1
|
Hernández B, Coïc YM, Kruglik SG, Sanchez-Cortes S, Ghomi M. Relationships between conformational and vibrational features of tryptophan characteristic Raman markers. Spectrochim Acta A Mol Biomol Spectrosc 2024; 316:124377. [PMID: 38701580 DOI: 10.1016/j.saa.2024.124377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 04/23/2024] [Accepted: 04/27/2024] [Indexed: 05/05/2024]
Abstract
Tryptophan (Trp) residue provides characteristic vibrational markers to the middle wavenumber spectral region of the Raman spectra recorded from peptides and proteins. In this report, we were particularly interested in eight Trp Raman markers, referred to as Wi (i = 1,…,8). All responsible for pronounced Raman lines, these markers originate from indole moiety, a bicyclic conjugated segment involved in the Trp structure. Numerous investigations have previously attempted to relate the variations observed in the spectral features of these markers to the environmental changes of Trp residues. To emphasize the most important points we can mention (i) the variations in the Raman profile of W4 (∼1360 cm-1) and W5 (∼1340 cm-1), frequently observed as a doublet with variable intensity ratio. These two markers were thought to result from a Fermi-resonance effect between certain planar and nonplanar modes; (ii) the changes observed in the wavenumbers and relative intensities of W4, W7 (∼880 cm-1) and W8 (∼760 cm-1) were supposed to be related to the accessibility of Trp to surrounding water molecules; and (iii) the wavenumber fluctuations of W3 (∼1550 cm-1), taken as a Trp side chain orientational marker. However, some ambiguities still exist regarding the interpretation of these markers, needing further clarification. Herein, upon a joint experimental and theoretical analysis based on a multiconformational approach, attention was paid to the relationships between structural and vibrational features of three indole-containing compounds with increasing structural complexity, i.e., skatole (3-methylindole), tryptophan, and tripeptide Gly-Trp-Gly. This study clearly shows that the existing assignments given to certain Trp Raman markers should be reconsidered, especially those based on the Fermi-resonance origin of W4-W5 (∼1360-1340 cm-1) doublet, as well as the purely environmental dependence of W7 and W8 markers.
Collapse
Affiliation(s)
- Belén Hernández
- LVTS, INSERM U1148. 74 rue Marcel Cachin. 93017 Bobigny Cédex France
| | - Yves-Marie Coïc
- Institut Pasteur, Université Paris Cité, CNRS UMR3523, Unité de Chimie des Biomolécules, F-75015 Paris, France
| | - Sergei G Kruglik
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, Laboratoire Jean-Perrin, 4 Place Jussieu, 75005 Paris, France
| | | | - Mahmoud Ghomi
- Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid, Spain.
| |
Collapse
|
2
|
Deng JJ, Peterson SD. Sensitivity of Phonation Onset Pressure to Vocal Fold Stiffness Distribution. J Biomech Eng 2024; 146:081003. [PMID: 38345603 DOI: 10.1115/1.4064718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Indexed: 03/22/2024]
Abstract
Phonation onset is characterized by the unstable growth of vocal fold (VF) vibrations that ultimately results in self-sustained oscillation and the production of modal voice. Motivated by histological studies, much research has focused on the role of the layered structure of the vocal folds in influencing phonation onset, wherein the outer "cover" layer is relatively soft and the inner "body" layer is relatively stiff. Recent research, however, suggests that the body-cover (BC) structure over-simplifies actual stiffness distributions by neglecting important spatial variations, such as inferior-superior (IS) and anterior-posterior gradients and smooth transitions in stiffness from one histological layer to another. Herein, we explore sensitivity of phonation onset to stiffness gradients and smoothness. By assuming no a priori stiffness distribution and considering a second-order Taylor series sensitivity analysis of phonation onset pressure with respect to stiffness, we find two general smooth stiffness distributions most strongly influence onset pressure: a smooth stiffness containing aspects of BC differences and IS gradients in the cover, which plays a role in minimizing onset pressure, and uniform increases in stiffness, which raise onset pressure and frequency. While the smooth stiffness change contains aspects qualitatively similar to layered BC distributions used in computational studies, smooth transitions in stiffness result in higher sensitivity of onset pressure than discrete layering. These two general stiffness distributions also provide a simple, low-dimensional, interpretation of how complex variations in VF stiffness affect onset pressure, enabling refined exploration of the effects of stiffness distributions on phonation onset.
Collapse
Affiliation(s)
- Jonathan J Deng
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Sean D Peterson
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| |
Collapse
|
3
|
Fujioka H, Murao Y, Okinaka M, John Spratt S, Shou J, Kawatani M, Kojima R, Tachibana R, Urano Y, Ozeki Y, Kamiya M. Cyano-Hydrol green derivatives: Expanding the 9-cyanopyronin-based resonance Raman vibrational palette. Bioorg Med Chem Lett 2024; 106:129757. [PMID: 38636718 DOI: 10.1016/j.bmcl.2024.129757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/11/2024] [Accepted: 04/15/2024] [Indexed: 04/20/2024]
Abstract
9-cyanopyronin is a promising scaffold that exploits resonance Raman enhancement to enable sensitive, highly multiplexed biological imaging. Here, we developed cyano-Hydrol Green (CN-HG) derivatives as resonance Raman scaffolds to expand the color palette of 9-cyanopyronins. CN-HG derivatives exhibit sufficiently long wavelength absorption to produce strong resonance Raman enhancement for near-infrared (NIR) excitation, and their nitrile peaks are shifted to a lower frequency than those of 9-cyanopyronins. The fluorescence of CN-HG derivatives is strongly quenched due to the lack of the 10th atom, unlike pyronin derivatives, and this enabled us to detect spontaneous Raman spectra with high signal-to-noise ratios. CN-HG derivatives are powerful candidates for high performance vibrational imaging.
Collapse
Affiliation(s)
- Hiroyoshi Fujioka
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho. Midori-ku, Yokohama, Kanagawa 226-8501, Japan
| | - Yuta Murao
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho. Midori-ku, Yokohama, Kanagawa 226-8501, Japan
| | - Momoko Okinaka
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Spencer John Spratt
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Jingwen Shou
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Minoru Kawatani
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho. Midori-ku, Yokohama, Kanagawa 226-8501, Japan; Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ryosuke Kojima
- Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ryo Tachibana
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yasuteru Urano
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yasuyuki Ozeki
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan; Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Mako Kamiya
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho. Midori-ku, Yokohama, Kanagawa 226-8501, Japan; Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Research Center for Autonomous Systems Meterialogy (ASMat), Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho. Midori-ku, Yokohama, Kanagawa 226-8501, Japan.
| |
Collapse
|
4
|
Jar C, Archibald A, Gibson M, Westover L. Evaluation of a vibration modeling technique for the in-vitro measurement of dental implant stability. J Mech Behav Biomed Mater 2024; 154:106537. [PMID: 38588632 DOI: 10.1016/j.jmbbm.2024.106537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/06/2024] [Accepted: 04/01/2024] [Indexed: 04/10/2024]
Abstract
The Advanced System for Implant Stability Testing (ASIST) is a device currently being developed to noninvasively measure implant stability by estimating the mechanical stiffness of the bone-implant interface, which is reported as the ASIST Stability Coefficient (ASC). This study's purpose was to determine whether changes in density, bonding, and drilling technique affect the measured vibration of a dental implant, and whether they can be quantified as a change in the estimated BII stiffness. Stability was also measured using RFA, insertion torque (IT) and the pullout test. Bone-level tapered implants (4.1 mm diameter, 10 mm length) were inserted in polyurethane foam as an artificial bone substitute. Samples were prepared using different bone densities (20, 30, 40 PCF), drilling sequences, and superglue to simulate a bonded implant. Measurements were compared across groups at a significance level of 0.05. The ASC was able to indicate changes in each factor as a change in the interfacial stiffness. IT and pullout force values also showed comparable increases. Furthermore, the relative difference in ISQ values between experimental groups was considerably smaller than the ASC. While future work should be done using biological bone and in-vivo systems, the results of this in-vitro study suggest that modelling of the implant system with a vibration-based approach may provide a noninvasive method of assessing the mechanical stability of the implant.
Collapse
Affiliation(s)
- Chester Jar
- University of Alberta, Department of Mechanical Engineering, Edmonton, Alberta, T6G 2R3, Canada.
| | - Andrew Archibald
- University of Alberta, Department of Medicine, Edmonton, Alberta, T6G 2R3, Canada.
| | - Monica Gibson
- University of Alberta, Department of Dentistry, Edmonton, Alberta, T6G 2R3, Canada.
| | - Lindsey Westover
- University of Alberta, Department of Mechanical Engineering, Edmonton, Alberta, T6G 2R3, Canada; University of Alberta, Department of Biomedical Engineering, Edmonton, Alberta, T6G 2R3, Canada.
| |
Collapse
|
5
|
Yang WW, Liu YC, Chen WH, Tai HH, Sato K, Ma HP, Liu C. Hitting weighted baseball enhances the experience of bat-ball contacts. Sports Biomech 2024; 23:728-739. [PMID: 33663343 DOI: 10.1080/14763141.2021.1890196] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 02/10/2021] [Indexed: 10/22/2022]
Abstract
Bat-ball contacts are critical in the baseball hitting process. However, an effective training method for increasing the impact perception of a bat-ball contact is currently unavailable. Although not widely used, hitting a stationary weighted baseball can be an appropriate method for batters to simulate the perception of hitting a moving baseball. Therefore, swing velocity, wrist vibration, and forearm muscle activation for hitting stationary weighted, stationary regulation, and pitched baseballs were investigated in this study. Twelve position players hit a stationary weighted, stationary regulation, and pitched baseball at a speed of 70.28 ± 3.84 km/h in a random order. The swing velocity, wrist vibration, forearm muscle activation, and co-contraction ratio during hitting phases were analysed. The results indicated that the swing velocity during each specific phase demonstrated no significant differences between the different conditions. Hitting weighted and pitched baseballs caused higher wrist vibration, muscle activation, and co-contraction ratio during the contact phase than hitting regulation balls (p < 0.05). The conclusion was that hitting weighted baseballs could mimic the impact condition of hitting pitched baseballs without changing the pattern of swing velocity, which suggested that this method has potential as a hitting drill for improving hitting perception at bat-ball contact.
Collapse
Affiliation(s)
- Wen-Wen Yang
- Department of Sports Medicine, China Medical University, Taichung, Taiwan
| | - Ya-Chen Liu
- The Office of Physical Education, Chung Hua University, Hsinchu, Taiwan
| | - Wei-Han Chen
- Graduate Institute of Sports Equipment Technology, University of Taipei, Taipei, Taiwan
| | - Hsing-Hao Tai
- The Office of Physical Education, Chien Hsin University of Science and Technology, Taoyuan, Taiwan
| | | | - Hsi-Pin Ma
- Department of Electronic Engineering, National Tsing Hua University, Hsinchu, Taiwan
- Center for Sport Science and Technology, National Tsing Hua University, Hsinchu, Taiwan
| | - Chiang Liu
- Graduate Institute of Sports Equipment Technology, University of Taipei, Taipei, Taiwan
- Center for Sport Science and Technology, National Tsing Hua University, Hsinchu, Taiwan
- National Baseball Research and Development Center, Taipei, Taiwan
| |
Collapse
|
6
|
Ishihara Y, Numano T, Ito D, Nishijo H, Takamoto K, Kikuchi J, Konuma S, Oka H. Development of a suitable vibration pad for renal MR elastography. Magn Reson Imaging 2024; 109:120-126. [PMID: 38492785 DOI: 10.1016/j.mri.2024.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/04/2024] [Accepted: 03/13/2024] [Indexed: 03/18/2024]
Abstract
The aim of this study was to develop a vibration pad suitable for renal MR elastography (MRE). Chronic kidney disease (CKD) is a progressive condition affecting >800 million people worldwide. Renal fibrosis is a common pathological feature of CKD that causes fibrotic regions to be much stiffer than those in normal renal tissues. Therefore, MRE can be used to diagnose CKD because it can image organ stiffness. In MRE, the shear modulus is obtained from the wavelength of the shear waves. Therefore, it is highly important to propagate shear waves with sufficient vibration strength in the tissue. By using a three-dimensional (3D) printer, we created a "Flexible Pad" suitable for renal MRE. The Flexible Pad was placed under the back of the participant in the supine position and deformed in response to the participant's weight, adhering closely to the body surface. Six healthy volunteers participated in this study. Our Flexible Pad allowed for coherent shear waves (clear waves with little scattering and interference) to be efficiently transmitted to the kidney deep-lying tissues in the abdomen. The shear moduli of the kidney (n = 6) were 8.95 ± 0.84 kPa in the right kidney and 9.70 ± 0.99 kPa in the left kidney. Our results indicate that using our Flexible Pad for renal MRE can provide a more reliable measurement of renal shear modulus.
Collapse
Affiliation(s)
- Yoshito Ishihara
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Tomokazu Numano
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan.
| | - Daiki Ito
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan; Office of Radiation Technology, Keio University Hospital, Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Hisao Nishijo
- Department of Sport and Health Sciences, Faculty of Human Sciences, University of East Asia, 2-1, Ichinomiya Gakuen-cho, Shimonoseki-shi, Yamaguchi 751-8503, Japan
| | - Koichi Takamoto
- Department of Sport and Health Sciences, Faculty of Human Sciences, University of East Asia, 2-1, Ichinomiya Gakuen-cho, Shimonoseki-shi, Yamaguchi 751-8503, Japan
| | - Jo Kikuchi
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Shota Konuma
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Hiromu Oka
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| |
Collapse
|
7
|
Du Y, Jiang S, Han Y, Liu Q, Cui L, Zhang CY. Synthesis of silica-encapsulated tetraphenylethylene with aggregation-induced electrochemiluminescence resonance energy transfer for sensitively sensing microcystin-LR. Talanta 2024; 272:125752. [PMID: 38354543 DOI: 10.1016/j.talanta.2024.125752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 01/31/2024] [Accepted: 02/05/2024] [Indexed: 02/16/2024]
Abstract
The reported organic electrochemiluminescence (ECL) luminophors for the detection of various markers often suffer from intermolecular π-π stacking-induced luminophore quenching. Herein, we demonstrate one-pot synthesis of a new aggregation-induced electrochemiluminescence (AIECL) emitter (i.e., TPE@SiO2/rGO composite) for sensitive measurement of microcystin-leucine arginine (MC-LR). The TPE@SiO2/rGO composite is constructed by embedding the silica-encapsuled 1,1,2,2-tetra(4-carboxylphenyl)ethylene (TPE) in the reduced graphene oxide. In comparison with the monomer TPE, this composite exhibit high luminescence efficiency and strong ECL emission, because the AIECL phenomenon triggered by the spatial confinement effect in the SiO2 cage induces the restriction of the internal motion and vibration of molecules. Notably, this composite has distinct advantages of easy preparation, simple functionalization, and stable luminescence. Especially, the TPE@SiO2/rGO-based ECL-RET system exhibits a high quenching efficiency (ΦET) of 69.7%. When target MC-LR is present, it triggers DNA strand displacement reaction (SDR), inducing the quenching of the ECL signal of TPE@SiO2/rGO composite due to ECL resonance energy transfer between TPE@SiO2/rGO composite and methylene blue (MB). The proposed biosensor enables highly sensitive, low-cost, and robust measurement of MC-LR with a large dynamic range of 7 orders of magnitude and a detection limit of 3.78 fg/mL, and it displays excellent detection performance in complex biological matrices, holding potential applications in food safety and water monitoring.
Collapse
Affiliation(s)
- Yu Du
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, China
| | - Su Jiang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, China
| | - Yun Han
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China
| | - Qian Liu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China
| | - Lin Cui
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, China.
| | - Chun-Yang Zhang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.
| |
Collapse
|
8
|
Bowling PE, Dasgupta S, Herbert JM. Eliminating Imaginary Vibrational Frequencies in Quantum-Chemical Cluster Models of Enzymatic Active Sites. J Chem Inf Model 2024; 64:3912-3922. [PMID: 38648614 DOI: 10.1021/acs.jcim.4c00221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
In constructing finite models of enzyme active sites for quantum-chemical calculations, atoms at the periphery of the model must be constrained to prevent unphysical rearrangements during geometry relaxation. A simple fixed-atom or "coordinate-lock" approach is commonly employed but leads to undesirable artifacts in the form of small imaginary frequencies. These preclude evaluation of finite-temperature free-energy corrections, limiting thermochemical calculations to enthalpies only. Full-dimensional vibrational frequency calculations are possible by replacing the fixed-atom constraints with harmonic confining potentials. Here, we compare that approach to an alternative strategy in which fixed-atom contributions to the Hessian are simply omitted. While the latter strategy does eliminate imaginary frequencies, it tends to underestimate both the zero-point energy and the vibrational entropy while introducing artificial rigidity. Harmonic confining potentials eliminate imaginary frequencies and provide a flexible means to construct active-site models that can be used in unconstrained geometry relaxations, affording better convergence of reaction energies and barrier heights with respect to the model size, as compared to models with fixed-atom constraints.
Collapse
Affiliation(s)
- Paige E Bowling
- Biophysics Graduate Program, The Ohio State University, Columbus, Ohio 43210, United States
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Saswata Dasgupta
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
- Department of Chemistry and Biochemistry, University of California-San Diego, La Jolla, California 92093, United States
| | - John M Herbert
- Biophysics Graduate Program, The Ohio State University, Columbus, Ohio 43210, United States
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| |
Collapse
|
9
|
Dong Y, Iammarino M, Liu J, Codling J, Fagert J, Mirshekari M, Lowes L, Zhang P, Noh HY. Ambient floor vibration sensing advances the accessibility of functional gait assessments for children with muscular dystrophies. Sci Rep 2024; 14:10774. [PMID: 38729999 PMCID: PMC11087496 DOI: 10.1038/s41598-024-60034-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 04/18/2024] [Indexed: 05/12/2024] Open
Abstract
Muscular dystrophies (MD) are a group of genetic neuromuscular disorders that cause progressive weakness and loss of muscles over time, influencing 1 in 3500-5000 children worldwide. New and exciting treatment options have led to a critical need for a clinical post-marketing surveillance tool to confirm the efficacy and safety of these treatments after individuals receive them in a commercial setting. For MDs, functional gait assessment is a common approach to evaluate the efficacy of the treatments because muscle weakness is reflected in individuals' walking patterns. However, there is little incentive for the family to continue to travel for such assessments due to the lack of access to specialty centers. While various existing sensing devices, such as cameras, force plates, and wearables can assess gait at home, they are limited by privacy concerns, area of coverage, and discomfort in carrying devices, which is not practical for long-term, continuous monitoring in daily settings. In this study, we introduce a novel functional gait assessment system using ambient floor vibrations, which is non-invasive and scalable, requiring only low-cost and sparsely deployed geophone sensors attached to the floor surface, suitable for in-home usage. Our system captures floor vibrations generated by footsteps from patients while they walk around and analyzes such vibrations to extract essential gait health information. To enhance interpretability and reliability under various sensing scenarios, we translate the signal patterns of floor vibration to pathological gait patterns related to MD, and develop a hierarchical learning algorithm that aggregates insights from individual footsteps to estimate a person's overall gait performance. When evaluated through real-world experiments with 36 subjects (including 15 patients with MD), our floor vibration sensing system achieves a 94.8% accuracy in predicting functional gait stages for patients with MD. Our approach enables accurate, accessible, and scalable functional gait assessment, bringing MD progressive tracking into real life.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Linda Lowes
- Nationwide Children's Hospital, Columbus, USA
| | - Pei Zhang
- University of Michigan, Ann Arbor, USA
| | | |
Collapse
|
10
|
Jiang Q, Yin Z, Yin H, Ma R, Lin W. Seismic performance of soft soil foundation with a new type of assembled wall tuned mass damper. PLoS One 2024; 19:e0298263. [PMID: 38722883 PMCID: PMC11081288 DOI: 10.1371/journal.pone.0298263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 01/22/2024] [Indexed: 05/13/2024] Open
Abstract
The design of tuned mass damper (TMD) parameters is influenced by the soil-structure-TMD coupling system; thus, it is important to consider the soil-structure interaction (SSI) for the vibration control effect of the TMD. Recently, the acquisition of TMD parameters considering soil-structure interactions has only remained at the theoretical stage, lacking relevant experimental verification. Traditional TMD face the problems of occupying a large building space, increasing construction costs, and non-replaceable components. In this study, an assembled wall-type damping TMD was designed. By comparing the dynamic response of the uncontrolled and controlled structures equipped with the newly assembled wall-type damping TMD in the shaking table test on a soft soil foundation, we analyzed whether the SSI effect was considered in the TMD design parameters on the damping effect of the newly assembled wall-type tuned mass damper. The TMD parameters optimized using the artificial intelligence algorithm were verified experimentally. The results indicated that the traditional TMD design parameters were discordant because the SSI effect was not considered. The SSI effect in the soil effectively reduces the dynamic response of the superstructure. By considering the SSI effect and improving the multi-population genetic algorithm, a wall-type damping TMD with optimized parameters can achieve a good damping effect.
Collapse
Affiliation(s)
- Qi Jiang
- School of Mining, Liaoning Technical University, Fuxin, China
| | - Zhigang Yin
- School of Mining, Liaoning Technical University, Fuxin, China
| | - Hang Yin
- Institute for Smart City of Chongqing University in Liyang, Liyang, China
| | - Runbo Ma
- College of Civil Engineering, Liaoning Technical University, Fuxin, China
| | - Weiqiang Lin
- College of Civil Engineering, Liaoning Technical University, Fuxin, China
| |
Collapse
|
11
|
Zhu Q, Xiao Q. Dynamics of seaweed-inspired piezoelectric plates for energy harvesting from oscillatory cross flow. Bioinspir Biomim 2024; 19:046004. [PMID: 38663427 DOI: 10.1088/1748-3190/ad43d1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 04/25/2024] [Indexed: 05/09/2024]
Abstract
Inspired by the vibrations of aquatic plants such as seaweed in the unsteady flow fields generated by free-surface waves, we investigate a novel device based on piezoelectric plates to harvest energy from oscillatory cross flows. Towards this end, numerical studies are conducted using a flow-structure-electric interaction model to understand the underlying physical mechanisms involved in the dynamics and energy harvesting performance of one or a pair of piezoelectric plates in an oscillatory cross flow. In a single-plate configuration, both periodic and irregular responses have been observed depending on parameters such as normalized plate stiffness and Keulegan-Carpenter number. Large power harvesting is achieved with the excitation of natural modes. Besides, when the time scale of the motion and the intrinsic time scale of the circuit are close to each other the power extraction is enhanced. In a two-plate configuration with tandem formation, the hydrodynamic interaction between the two plates can induce irregularity in the response. In terms of energy harvesting, two counteracting mechanisms have been identified, shielding and energy recovery. The shielding effect reduces plate motion and energy harvesting, whereas with the energy recovery effect one plate is able to recovery energy from the wake of another for performance enhancement. The competition between these mechanisms leads to constructive or destructive interactions between the two plates. These results suggest that for better performance the system should be excited at its natural period, which should be close to the intrinsic time scale of the circuit. Moreover, using a pair of plates in a tandem formation can further improve the energy harvesting capacity when conditions for constructive interaction are satisfied.
Collapse
Affiliation(s)
- Qiang Zhu
- Department of Structural Engineering, University of California, La Jolla, San Diego, CA 92093, United States of America
| | - Qing Xiao
- Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, Glasgow G4 0LZ, Scotland, United Kingdom
| |
Collapse
|
12
|
Cha J, Kim C, Choi SH. Extrinsic Laryngeal Muscle Activity With Different Diameters and Water Depths in a Semi-Occluded Vocal Tract Exercise. J Speech Lang Hear Res 2024; 67:1324-1338. [PMID: 38592964 DOI: 10.1044/2024_jslhr-23-00194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
PURPOSE Surface electromyography (sEMG) has been used to evaluate extrinsic laryngeal muscle activity during swallowing and phonation. In the current study, sEMG amplitudes were measured from the infrahyoid and suprahyoid muscles during phonation through a tube submerged in water. METHOD The sEMG amplitude values measured from the extrinsic laryngeal muscles and the electroglottographic contact quotient (CQ) were obtained simultaneously from 62 healthy participants (31 men, 31 women) during phonation through a tube at six different depths (2, 4, 7, 10, 15, and 20 cm) while using two tubes with different diameters (1 and 0.5 cm). RESULTS With increasing depth, the sEMG amplitude for the suprahyoid muscles increased in men and women. However, sEMG amplitudes for the infrahyoid muscles increased significantly only in men. Tube diameter had a significant effect on the suprahyoid sEMG amplitudes only for men, with higher sEMG amplitudes when phonating with a 1.0-cm tube. CQ values increased with submerged depth for both men and women. Tube diameter affected results such than CQ values were higher for men when using the wider tube and for women with the narrower tube. CONCLUSIONS Vocal fold vibratory patterns changed with the depth of tube submersion in water for both men and women, but the patterns of muscle activation differed between the sexes. This suggests that men and women use different strategies when confronted with increased intraoral pressure during semi-occluded vocal tract exercises. In this study, sEMG provided insight into the mechanism for differences between vocally normal individuals and could help detect compensatory muscle activation during tube phonation in water for people with voice disorders.
Collapse
Affiliation(s)
- Junseo Cha
- Department of Audiology and Speech-Language Pathology, Research Institute of Biomimetic Sensory Control, Catholic Hearing Voice Speech Center, Daegu Catholic University, Gyeongsan, South Korea
| | - Chaehyun Kim
- Department of Audiology and Speech-Language Pathology, Research Institute of Biomimetic Sensory Control, Catholic Hearing Voice Speech Center, Daegu Catholic University, Gyeongsan, South Korea
| | - Seong Hee Choi
- Department of Audiology and Speech-Language Pathology, Research Institute of Biomimetic Sensory Control, Catholic Hearing Voice Speech Center, Daegu Catholic University, Gyeongsan, South Korea
| |
Collapse
|
13
|
Tanabe T, Kaneko H. Illusory Directional Sensation Induced by Asymmetric Vibrations Influences Sense of Agency and Velocity in Wrist Motions. IEEE Trans Neural Syst Rehabil Eng 2024; 32:1749-1756. [PMID: 38656862 DOI: 10.1109/tnsre.2024.3393434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Illusory directional sensations are generated through asymmetric vibrations applied to the fingertips and have been utilized to induce upper-limb motions in the rehabilitation and training of patients with visual impairment. However, its effects on motor control remain unclear. This study aimed to verify the effects of illusory directional sensations on wrist motion. We conducted objective and subjective evaluations of wrist motion during a motor task, while inducing an illusory directional sensation that was congruent or incongruent with wrist motion. We found that, when motion and illusory directional sensations were congruent, the sense of agency for motion decreased. This indicates an induction sensation of the hand being moved by the illusion. Interestingly, although no physical force was applied to the hand, the angular velocity of the wrist was higher in the congruent condition than that in the no-stimulation condition. The angular velocity of the wrist and electromyography signals of the agonist muscles were weakly positively correlated, suggesting that the participants may have increased their wrist velocity. In other words, the congruence between the direction of motion and illusory directional sensation induced the sensation of the hand being moved, even though the participants' wrist-motion velocity increased. This phenomenon can be explained by the discrepancy between the sensation of active motion predicted by the efferent copy, and that of actual motion caused by the addition of the illusion. The findings of this study can guide the design of novel rehabilitation methods.
Collapse
|
14
|
Baker CP, Sundberg J, Purdy SC, Rakena TO, Leão SHDS. CPPS and Voice-Source Parameters: Objective Analysis of the Singing Voice. J Voice 2024; 38:549-560. [PMID: 35000836 DOI: 10.1016/j.jvoice.2021.12.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/08/2021] [Accepted: 12/13/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION In recent years cepstral analysis and specific cepstrum-based measures such as smoothed cepstral peak prominence (CPPS) has become increasingly researched and utilized in attempts to determine the extent of overall dysphonia in voice signals. Yet, few studies have extensively examined how specific voice-source parameters affect CPPS values. OBJECTIVE Using a range of synthesized tones, this exploratory study sought to systematically analyze the effect of fundamental frequency (fo), vibrato extent, source-spectrum tilt, and the amplitude of the voice-source fundamental on CPPS values. MATERIALS AND METHODS A series of scales were synthesised using the freeware Madde. Fundamental frequency, vibrato extent, source-spectrum tilt, and the amplitude of the voice-source fundamental were systematically and independently varied. The tones were analysed in PRAAT, and statistical analyses were conducted in SPSS. RESULTS CPPS was significantly affected by both fo and source-spectrum tilt, independently. A nonlinear association was seen between vibrato extent and CPPS, where CPPS values increased from 0 to 0.6 semitones (ST), then rapidly decreased approaching 1.0 ST. No relationship was seen between the amplitude of the voice-source fundamental and CPPS. CONCLUSION The large effect of fo should be taken into account when analyzing the voice, particularly in singing-voice research, when comparing pre and posttreatment data, and when comparing inter-subject CPPS data.
Collapse
Affiliation(s)
- Calvin P Baker
- Department of Voice, School of Music, University of Auckland, Auckland Central, Auckland, New Zealand.
| | - Johan Sundberg
- Division of Speech, Music and Hearing, School of Electrical Engineering and Computer Science, KTH (Royal Institute of Technology), Stockholm, Sweden; Department of Linguistics, Stockholm University, Stockholm, Sweden; University College of Music Education Stockholm, Sweden
| | - Suzanne C Purdy
- School of Psychology, University of Auckland, Auckland Central, Auckland, New Zealand
| | - Te Oti Rakena
- Department of Voice, School of Music, University of Auckland, Auckland Central, Auckland, New Zealand
| | - Sylvia H de S Leão
- Speech Science, School of Psychology, University of Auckland, Grafton, Auckland, New Zealand
| |
Collapse
|
15
|
Taylor JM, Conboy JC. Sum-frequency vibrational spectroscopy, a tutorial: Applications for the study of lipid membrane structure and dynamics. Biointerphases 2024; 19:031201. [PMID: 38738942 DOI: 10.1116/6.0003594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 04/23/2024] [Indexed: 05/14/2024] Open
Abstract
Planar supported lipid bilayers (PSLBs) are an ideal model for the study of lipid membrane structures and dynamics when using sum-frequency vibrational spectroscopy (SFVS). In this paper, we describe the construction of asymmetric PSLBs and the basic SFVS theory needed to understand and make measurements on these membranes. Several examples are presented, including the determination of phospholipid orientation and measuring phospholipid transmembrane translocation (flip-flop).
Collapse
Affiliation(s)
- Joshua M Taylor
- Department of Chemistry, University of Utah, 315 South 1400 East RM. 2020, Salt Lake City, Utah 84112
| | - John C Conboy
- Department of Chemistry, University of Utah, 315 South 1400 East RM. 2020, Salt Lake City, Utah 84112
| |
Collapse
|
16
|
Uchima PV, Idehara SJ. Assessing patient transport conditions during ambulance transit. Proc Inst Mech Eng H 2024; 238:508-519. [PMID: 38562010 DOI: 10.1177/09544119241240908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Emergency ambulances play a vital role in medical rescue and patient transportation, but their transit can impact patient health due to vehicle dynamic forces and vibrations. This study evaluates patient transport conditions on a stretcher subjected to vertical vibration excitation from road unevenness. Using an eight-degree-of-freedom numerical model, we analyze the construction parameters of a medical stretcher's support and vehicle suspension. Actual experimental data from an emergency vehicle were utilized to assess the vibration conditions experienced by both the stretcher and the ambulance floor. The model is adjusted based on measurements, specifically targeting the main vibration modes. The investigation involves determining temporal responses for vertical accelerations and characterizing vibration modal parameters under various transportation conditions. Notably, several system natural frequencies fall within the range of human body frequencies, making them susceptible to mechanical excitation, particularly in the human neck, abdomen, and spine. A sensitivity analysis underscores the influence of medical stretcher support structure parameters on patient comfort. Increasing support stiffness, which alters the stretcher's natural frequency, and damping coefficient reduce vibration propagation between the vehicle and the patient. Additionally, the research predicts the model's dynamic behavior on roads with low-quality pavement, indicating vibrational amplitudes that could potentially be discomforting and unhealthy for individuals. The study illustrates a vibration exposure period on a class E road, revealing that transportation longer than 25 min may cause damage to patient health.
Collapse
Affiliation(s)
- Pedro Vitor Uchima
- Department of Mobility Engineering, Federal University of Santa Catarina, Joinville, Santa Catarina, Brazil
| | - Sérgio Junichi Idehara
- Department of Mobility Engineering, Federal University of Santa Catarina, Joinville, Santa Catarina, Brazil
| |
Collapse
|
17
|
Matsumoto T, Kanaya M, Matsushima D, Han C, Tokuda IT. Synchronized and Desynchronized Dynamics Observed from Physical Models of the Vocal and Ventricular Folds. J Voice 2024; 38:572-584. [PMID: 34903395 DOI: 10.1016/j.jvoice.2021.10.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/25/2021] [Accepted: 10/28/2021] [Indexed: 11/16/2022]
Abstract
The ventricular folds, located superiorly to the vocal folds, do not usually vibrate during normal phonations. It has been shown, however, that they do vibrate together with the vocal folds under special circumstances such as voice pathology and singing voice. Towards understanding the effect of the ventricular fold oscillations on the vocal fold oscillations, the present study developed a synthetic model that takes into account anatomical features of the human ventricular folds. The synthetic model is made of flexible silicone compounds with material properties comparable to those of human ventricular fold tissues. In our experiment, an air-flow was injected into the vocal and ventricular fold models. As the distance between the left and right ventricular folds was reduced, the ventricular folds started to co-vibrate with the vocal folds. Depending upon the distance, various oscillation patterns of the vocal-ventricular folds were observed, e.g., synchronized dynamics with 1:1 or 1:2 frequency ratio and desynchronized chaotic dynamics. The observed chaotic dynamics might be related to voice pathology induced by the ventricular phonation. A computational model was further presented to elucidate the experimental findings.
Collapse
Affiliation(s)
- Takuma Matsumoto
- Graduate School of Science and Engineering, Ritsumeikan University, Noji-higashi, Kusatsu, Shiga, Japan
| | - Mayuka Kanaya
- Graduate School of Science and Engineering, Ritsumeikan University, Noji-higashi, Kusatsu, Shiga, Japan
| | - Daisuke Matsushima
- Graduate School of Science and Engineering, Ritsumeikan University, Noji-higashi, Kusatsu, Shiga, Japan
| | - Cong Han
- Department of Mechanical Engineering, Ritsumeikan University, Noji-higashi, Kusatsu, Shiga, Japan
| | - Isao T Tokuda
- Graduate School of Science and Engineering, Ritsumeikan University, Noji-higashi, Kusatsu, Shiga, Japan.
| |
Collapse
|
18
|
Ebrahimian A, Mohammadi H, Maftoon N. Material characterization of human middle ear using machine-learning-based surrogate models. J Mech Behav Biomed Mater 2024; 153:106478. [PMID: 38493562 DOI: 10.1016/j.jmbbm.2024.106478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 02/09/2024] [Accepted: 02/24/2024] [Indexed: 03/19/2024]
Abstract
This study aims to introduce a novel non-invasive method for rapid material characterization of middle-ear structures, taking into consideration the invaluable insights provided by the mechanical properties of ear tissues. Valuable insights into various ear pathologies can be gleaned from the mechanical properties of ear tissues, yet conventional techniques for assessing these properties often entail invasive procedures that preclude their use on living patients. In this study, in the first step, we developed machine-learning models of the middle ear to predict its responses with a significantly lower computational cost in comparison to finite-element models. Leveraging findings from prior research, we focused on the most influential model parameters: the Young's modulus and thickness of the tympanic membrane and the Young's modulus of the stapedial annular ligament. The eXtreme Gradient Boosting (XGBoost) method was implemented for creating the machine-learning models. Subsequently, we combined the created machine-learning models with Bayesian optimization (BoTorch) for fast and efficient estimation of the Young's moduli of the tympanic membrane and the stapedial annular ligament. We demonstrate that the resultant surrogate models can fairly represent the vibrational responses of the umbo, stapes footplate, and vibration patterns of the tympanic membrane at most frequencies. Also, our proposed material characterization approach successfully estimated the Young's moduli of the tympanic membrane and stapedial annular ligament (separately and simultaneously) with values of mean absolute percentage error of less than 7%. The remarkable accuracy achieved through the proposed material characterization method underscores its potential for eventual clinical applications of estimating mechanical properties of the middle-ear structures for diagnostic purposes.
Collapse
Affiliation(s)
- Arash Ebrahimian
- Department of Systems Design Engineering, University of Waterloo, Waterloo, ON, Canada; Centre for Bioengineering and Biotechnology, University of Waterloo, Waterloo, ON, Canada
| | - Hossein Mohammadi
- Department of Systems Design Engineering, University of Waterloo, Waterloo, ON, Canada; Centre for Bioengineering and Biotechnology, University of Waterloo, Waterloo, ON, Canada
| | - Nima Maftoon
- Department of Systems Design Engineering, University of Waterloo, Waterloo, ON, Canada; Centre for Bioengineering and Biotechnology, University of Waterloo, Waterloo, ON, Canada.
| |
Collapse
|
19
|
Peacock J, Spellman GM, Field DJ, Mason MJ, Mayr G. Comparative morphology of the avian bony columella. Anat Rec (Hoboken) 2024; 307:1735-1763. [PMID: 37365751 DOI: 10.1002/ar.25278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 06/01/2023] [Accepted: 06/04/2023] [Indexed: 06/28/2023]
Abstract
In birds, the columella is the only bony element of the sound conducting apparatus, conveying vibrations of the cartilaginous extracolumella to the fluid of the inner ear. Although avian columellar morphology has attracted some attention over the past century, it nonetheless remains poorly described in the literature. The few existing studies mostly focus on morphological descriptions in relatively few taxa, with no taxonomically broad surveys yet published. Here we use observations of columellae from 401 extant bird species to provide a comprehensive survey of columellar morphology in a phylogenetic context. We describe the columellae of several taxa for the first time and identify derived morphologies characterizing higher-level clades based on current phylogenies. In particular, we identify a derived columellar morphology diagnosing a major subclade of Accipitridae. Within Suliformes, we find that Fregatidae, Sulidae, and Phalacrocoracidae share a derived morphology that is absent in Anhingidae, suggesting a secondary reversal. Phylogenetically informed comparisons allow recognition of instances of homoplasy, including the distinctive bulbous columellae in suboscine passerines and taxa belonging to Eucavitaves, and bulging footplates that appear to have evolved at least twice independently in Strigiformes. We consider phylogenetic and functional factors influencing avian columellar morphology, finding that aquatic birds possess small footplates relative to columellar length, possibly related to hearing function in aquatic habitats. By contrast, the functional significance of the distinctive bulbous basal ends of the columellae of certain arboreal landbird taxa remains elusive.
Collapse
Affiliation(s)
- John Peacock
- Department of Physiology and Biophysics, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Garth M Spellman
- Department of Zoology, Denver Museum of Nature and Science, Denver, Colorado, USA
| | - Daniel J Field
- Department of Earth Sciences, University of Cambridge, Cambridge, UK
- Museum of Zoology, University of Cambridge, Cambridge, UK
| | - Matthew J Mason
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
| | - Gerald Mayr
- Ornithological Section, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt am Main, Germany
| |
Collapse
|
20
|
Pagán OR. The complexities of ligand/receptor interactions: Exploring the role of molecular vibrations and quantum tunnelling. Bioessays 2024; 46:e2300195. [PMID: 38459808 DOI: 10.1002/bies.202300195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 01/19/2024] [Accepted: 02/19/2024] [Indexed: 03/10/2024]
Abstract
Molecular vibrations and quantum tunneling may link ligand binding to the function of pharmacological receptors. The well-established lock-and-key model explains a ligand's binding and recognition by a receptor; however, a general mechanism by which receptors translate binding into activation, inactivation, or modulation remains elusive. The Vibration Theory of Olfaction was proposed in the 1930s to explain this subset of receptor-mediated phenomena by correlating odorant molecular vibrations to smell, but a mechanism was lacking. In the 1990s, inelastic electron tunneling was proposed as a plausible mechanism for translating molecular vibration to odorant physiology. More recently, studies of ligands' vibrational spectra and the use of deuterated ligand analogs have provided helpful information to study this admittedly controversial hypothesis in metabotropic receptors other than olfactory receptors. In the present work, based in part on published experiments from our laboratory using planarians as an experimental organism, I will present a rationale and possible experimental approach for extending this idea to ligand-gated ion channels.
Collapse
Affiliation(s)
- Oné R Pagán
- Department of Biology, West Chester University, West Chester, Pennsylvania, USA
| |
Collapse
|
21
|
Gustafsson JK, Södersten M, Ternström S, Schalling E. Treatment of Hypophonia in Parkinson's Disease Through Biofeedback in Daily Life Administered with A Portable Voice Accumulator. J Voice 2024; 38:800.e27-800.e38. [PMID: 34893384 DOI: 10.1016/j.jvoice.2021.10.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 10/06/2021] [Accepted: 10/10/2021] [Indexed: 11/18/2022]
Abstract
OBJECTIVES The purpose of this study was to assess the outcome following continuous tactile biofeedback of voice sound level administered, with a portable voice accumulator to individuals with Parkinson's disease (PD). METHOD Nine out of 16 participants with PD completed a 4-week intervention program where biofeedback of voice sound level was administered with the portable voice accumulator VoxLog during speech in daily life. The feedback, a tactile vibration signal from the device, was activated when the wearer used a voice sound level below an individually predetermined threshold level, reminding the wearer to increase voice sound level during speech. Voice use was registered in daily life with the VoxLog during the intervention period as well as during one baseline week, one follow-up week post intervention and 1 week 3 months post intervention. Self-to-other ratio (SOR), which is the difference between voice sound level and environmental noise, was studied in multiple noise ranges. RESULTS A significant increase in SOR across all noise ranges of 2.28 dB (SD: 0.55) was seen for participants with scores above the cut-off for normal function (>26 points) on the cognitive screening test Montreal Cognitive Assessment (MoCA) (n = 5). No significant increase was seen for the group of participants with MoCA scores below 26 (n = 4). Forty-four percent ended their participation early, all which scored below 26 on MoCA (n = 7). CONCLUSIONS Biofeedback administered in daily life regarding voice level may help individuals with PD to increase their voice sound level in relation to environmental noise in daily life, but only for a limited subset. Only participants with normal cognitive function as screened by MoCA improved their voice sound level in relation to environmental noise.
Collapse
Affiliation(s)
- Joakim Körner Gustafsson
- Department of Clinical Science, Intervention and Technology, Division of Speech and Language Pathology, Karolinska Institutet, Stockholm, Sweden; Medical Unit Speech and Language Pathology, Karolinska University Hospital, Stockholm, Sweden.
| | - Maria Södersten
- Department of Clinical Science, Intervention and Technology, Division of Speech and Language Pathology, Karolinska Institutet, Stockholm, Sweden; Medical Unit Speech and Language Pathology, Karolinska University Hospital, Stockholm, Sweden
| | - Sten Ternström
- School of Electrical Engineering and Computer Science, Division of Speech, Music and Hearing, Royal Institute of Technology (KTH), Stockholm, Sweden
| | - Ellika Schalling
- Department of Clinical Science, Intervention and Technology, Division of Speech and Language Pathology, Karolinska Institutet, Stockholm, Sweden; Medical Unit Speech and Language Pathology, Karolinska University Hospital, Stockholm, Sweden; Department of Neuroscience/Speech and Language Pathology, Uppsala University, Uppsala, Sweden
| |
Collapse
|
22
|
Condon S, Hu H, Kong M, Cave MC, McClain CJ. ALT poorly predicts Nonalcoholic Fatty Liver Disease (NAFLD) and liver fibrosis as determined by vibration-controlled transient elastography in adult National Health and Nutrition Examination Survey 2017-2018. Am J Med Sci 2024; 367:310-322. [PMID: 38307172 DOI: 10.1016/j.amjms.2024.01.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/04/2024]
Abstract
BACKGROUND Non-alcoholic fatty liver disease is a growing problem in the United States, contributing to a range of liver disease as well as cardiovascular disease. ALT is the most widely used liver chemistry for NAFLD evaluation. We hypothesized that the normal range many laboratories use was too high, missing many patients with clinically important steatosis and/or fibrosis. METHODS This study utilized 2017-2018 NHANES data including 9254 participants. We compared four different upper limits of normal for ALT with specific measurements of steatosis and liver stiffness as determined by liver elastography with FibroScan®. Liver stiffness was further characterized as showing any fibrosis or advanced fibrosis. After exclusions, our final pool was 4184 for liver stiffness measurement and 4183 for steatosis grade as measured by Controlled Attenuation Parameter (CAP). Using these variables, we performed logistic regression between ALT and CAP, and ALT and fibrosis/advanced fibrosis, and did a Receiver Operating Characteristic curve. RESULTS Based on three of the most widely used cut off values for ALT, we found that ALT does not reliably rule out NAFLD in over 50% of cases. It also missed 45.9-64.2% of patients with liver fibrosis. CONCLUSIONS Our study revealed that ALT is an inaccurate marker for NAFLD as measured by FibroScan® with CAP greater than or equal to 300 dB/m. Accuracy improved specific risk factors were considered. These data also showed that ALT was a poor marker for liver fibrosis. We conclude that there is no single ALT level that accurately predicts hepatic steatosis or fibrosis.
Collapse
Affiliation(s)
- Sally Condon
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Louisville, Louisville, KY, USA; The Liver Transplant Program at UofL Health - Jewish Hospital Trager Transplant Center, Louisville, KY, USA
| | - Huirong Hu
- Department of Bioinformatics and Biostatistics, University of Louisville, Louisville, KY, USA
| | - Maiying Kong
- Department of Bioinformatics and Biostatistics, University of Louisville, Louisville, KY, USA
| | - Matthew C Cave
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Louisville, Louisville, KY, USA; The Liver Transplant Program at UofL Health - Jewish Hospital Trager Transplant Center, Louisville, KY, USA; University of Louisville Alcohol Research Center, Louisville, KY, USA; Hepatobiology & Toxicology Center, Louisville, KY, USA; Robley Rex VA Medical Center, Louisville, KY, USA
| | - Craig J McClain
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Louisville, Louisville, KY, USA; The Liver Transplant Program at UofL Health - Jewish Hospital Trager Transplant Center, Louisville, KY, USA; University of Louisville Alcohol Research Center, Louisville, KY, USA; Hepatobiology & Toxicology Center, Louisville, KY, USA; Robley Rex VA Medical Center, Louisville, KY, USA.
| |
Collapse
|
23
|
Ouakka S, Verlinden O, Kouroussis G. Forests as natural metamaterial barriers for urban railway-induced vibration attenuation. J Environ Manage 2024; 358:120686. [PMID: 38599078 DOI: 10.1016/j.jenvman.2024.120686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 03/01/2024] [Accepted: 03/16/2024] [Indexed: 04/12/2024]
Abstract
Noise and vibrations generated by railway traffic can seriously affect the adjacent buildings and their residents. Different mitigation methods have been proposed in the past decades to tackle this challenge. Despite many mitigation measures presented in the literature, some of these measures have shown limitations in their application, while for others their carbon footprint does not justify their implementation in real projects. This study introduces the concept of forests as natural metamaterials to attenuate the vibrations generated at the wheel-rail interaction. In particular, a group of natural metamaterials, in the form of a forest, is introduced into a vehicle/track/soil validated model based on the two-step approach. The ideal tree/soil unit-cell constituting the forest is obtained through a parametric investigation of the geometrical and material properties in order to have the first band-gap within the main range of frequencies generated by railway traffic in urban areas. The vibration attenuation levels obtained by the introduction of the natural metamaterial are then evaluated by considering a range of operational velocities for the T2000 Brussels tram LRV (Light Rail Vehicle). Finally, some insights on the attenuation efficiency of the selected forest towards vibrations generated by HSTs (High-Speed Trains) are given by considering a mono-wheel model with a higher range of vehicle speeds.
Collapse
Affiliation(s)
- Slimane Ouakka
- Department of Theoretical Mechanics, Dynamics and Vibrations, Faculty of Engineering, University of Mons, Mons, 7000, Belgium.
| | - Olivier Verlinden
- Department of Theoretical Mechanics, Dynamics and Vibrations, Faculty of Engineering, University of Mons, Mons, 7000, Belgium
| | - Georges Kouroussis
- Department of Theoretical Mechanics, Dynamics and Vibrations, Faculty of Engineering, University of Mons, Mons, 7000, Belgium
| |
Collapse
|
24
|
Jouybari AF, Ferraroli N, Bouri M, Alaoui SH, Kannape OA, Blanke O. Augmenting locomotor perception by remapping tactile foot sensation to the back. J Neuroeng Rehabil 2024; 21:65. [PMID: 38678291 PMCID: PMC11055306 DOI: 10.1186/s12984-024-01344-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 03/19/2024] [Indexed: 04/29/2024] Open
Abstract
BACKGROUND Sensory reafferents are crucial to correct our posture and movements, both reflexively and in a cognitively driven manner. They are also integral to developing and maintaining a sense of agency for our actions. In cases of compromised reafferents, such as for persons with amputated or congenitally missing limbs, or diseases of the peripheral and central nervous systems, augmented sensory feedback therefore has the potential for a strong, neurorehabilitative impact. We here developed an untethered vibrotactile garment that provides walking-related sensory feedback remapped non-invasively to the wearer's back. Using the so-called FeetBack system, we investigated if healthy individuals perceive synchronous remapped feedback as corresponding to their own movement (motor awareness) and how temporal delays in tactile locomotor feedback affect both motor awareness and walking characteristics (adaptation). METHODS We designed the system to remap somatosensory information from the foot-soles of healthy participants (N = 29), using vibrotactile apparent movement, to two linear arrays of vibrators mounted ipsilaterally on the back. This mimics the translation of the centre-of-mass over each foot during stance-phase. The intervention included trials with real-time or delayed feedback, resulting in a total of 120 trials and approximately 750 step-cycles, i.e. 1500 steps, per participant. Based on previous work, experimental delays ranged from 0ms to 1500ms to include up to a full step-cycle (baseline stride-time: µ = 1144 ± 9ms, range 986-1379ms). After each trial participants were asked to report their motor awareness. RESULTS Participants reported high correspondence between their movement and the remapped feedback for real-time trials (85 ± 3%, µ ± σ), and lowest correspondence for trials with left-right reversed feedback (22 ± 6% at 600ms delay). Participants further reported high correspondence of trials delayed by a full gait-cycle (78 ± 4% at 1200ms delay), such that the modulation of motor awareness is best expressed as a sinusoidal relationship reflecting the phase-shifts between actual and remapped tactile feedback (cos model: 38% reduction of residual sum of squares (RSS) compared to linear fit, p < 0.001). The temporal delay systematically but only moderately modulated participant stride-time in a sinusoidal fashion (3% reduction of RSS compared a linear fit, p < 0.01). CONCLUSIONS We here demonstrate that lateralized, remapped haptic feedback modulates motor awareness in a systematic, gait-cycle dependent manner. Based on this approach, the FeetBack system was used to provide augmented sensory information pertinent to the user's on-going movement such that they reported high motor awareness for (re)synchronized feedback of their movements. While motor adaptation was limited in the current cohort of healthy participants, the next step will be to evaluate if individuals with a compromised peripheral nervous system, as well as those with conditions of the central nervous system such as Parkinson's Disease, may benefit from the FeetBack system, both for maintaining a sense of agency over their movements as well as for systematic gait-adaptation in response to the remapped, self-paced, rhythmic feedback.
Collapse
Affiliation(s)
- Atena Fadaei Jouybari
- Laboratory of Cognitive Neuroscience, Faculty of Life Sciences, Neuro-X Institute, Swiss Federal Institute of Technology (EPFL), Geneva, 1012, Switzerland
| | - Nathanael Ferraroli
- Laboratory of Cognitive Neuroscience, Faculty of Life Sciences, Neuro-X Institute, Swiss Federal Institute of Technology (EPFL), Geneva, 1012, Switzerland
| | - Mohammad Bouri
- REHAssist Group, EPFL, Station 9, STI IMT MED, Lausanne, Switzerland
| | - Selim Habiby Alaoui
- Laboratory of Cognitive Neuroscience, Faculty of Life Sciences, Neuro-X Institute, Swiss Federal Institute of Technology (EPFL), Geneva, 1012, Switzerland
| | - Oliver Alan Kannape
- Laboratory of Cognitive Neuroscience, Faculty of Life Sciences, Neuro-X Institute, Swiss Federal Institute of Technology (EPFL), Geneva, 1012, Switzerland
- Virtual Medicine Center, HUG-NeuroCentre, Department of Clinical Neurosciences, University Hospitals Geneva, Geneva, Switzerland
| | - Olaf Blanke
- Laboratory of Cognitive Neuroscience, Faculty of Life Sciences, Neuro-X Institute, Swiss Federal Institute of Technology (EPFL), Geneva, 1012, Switzerland.
| |
Collapse
|
25
|
Li K, Suliali NJ, Sahoo PK, Silver CD, Davrandi M, Wright K, Reardon C, Johnson SD, Krauss TF. Noise Tolerant Photonic Bowtie Grating Environmental Sensor. ACS Sens 2024; 9:1857-1865. [PMID: 38597428 PMCID: PMC11059099 DOI: 10.1021/acssensors.3c02419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 02/29/2024] [Accepted: 04/02/2024] [Indexed: 04/11/2024]
Abstract
Resonant photonic refractive index sensors have made major advances based on their high sensitivity and contact-less readout capability, which is advantageous in many areas of science and technology. A major issue for the technological implementation of such sensors is their response to external influences, such as vibrations and temperature variations; the more sensitive a sensor, the more susceptible it also becomes to external influences. Here, we introduce a novel bowtie-shaped sensor that is highly responsive to refractive index variations while compensating for temperature changes and mechanical (linear and angular) vibrations. We exemplify its capability by demonstrating the detection of salinity to a precision of 0.1%, corresponding to 2.3 × 10-4 refractive index units in the presence of temperature fluctuations and mechanical vibrations. As a second exemplar, we detected bacteria growth in a pilot industrial environment. Our results demonstrate that it is possible to translate high sensitivity resonant photonic refractive index sensors into real-world environments.
Collapse
Affiliation(s)
- Kezheng Li
- School
of Physics, Engineering and Technology, University of York, Heslington, York YO10
5DD, U.K.
| | - Nyasha J. Suliali
- School
of Physics, Engineering and Technology, University of York, Heslington, York YO10
5DD, U.K.
| | - Pankaj K. Sahoo
- School
of Physics, Engineering and Technology, University of York, Heslington, York YO10
5DD, U.K.
- Department
of Physics, Dhenkanal Autonomous College, Dhenkanal 759001 Odisha, India
| | - Callum D. Silver
- School
of Physics, Engineering and Technology, University of York, Heslington, York YO10
5DD, U.K.
| | - Mehmet Davrandi
- Reading
Technical Centre, Procter and Gamble Technical
Centres Ltd., Reading RG2 0QE, U.K.
| | - Kevin Wright
- Reading
Technical Centre, Procter and Gamble Technical
Centres Ltd., Reading RG2 0QE, U.K.
| | - Christopher Reardon
- School
of Physics, Engineering and Technology, University of York, Heslington, York YO10
5DD, U.K.
| | - Steven D. Johnson
- School
of Physics, Engineering and Technology, University of York, Heslington, York YO10
5DD, U.K.
| | - Thomas F. Krauss
- School
of Physics, Engineering and Technology, University of York, Heslington, York YO10
5DD, U.K.
| |
Collapse
|
26
|
Elmanaseer WR, Alamoush RA, Alsoleihat F, Al-Omiri MK. Position of Fovea Palatinae relative to the vibrating line in various soft palate classifications among Jordanian edentulous population. Sci Rep 2024; 14:9559. [PMID: 38671220 PMCID: PMC11053158 DOI: 10.1038/s41598-024-60162-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Accepted: 04/19/2024] [Indexed: 04/28/2024] Open
Abstract
This study aims to examine the relationship between the locations of Fovea Palatinae and the posterior vibrating line in different classes of soft palate angulation (House Classification), accordingly determine its reliability as a landmark and a tool for determining the posterior limit of the maxillary complete denture. 280 completely edentulous patients with normal healthy mucosa from both genders were randomly selected. The House classification of the soft palate angulation was identified and recorded as Class I, II, or III. Phonation was used to determine the position of the vibrating line. The Fovea Palatinae was then marked. Then, the distance between the Fovea Palatinae and the vibrating line was measured and recorded. Finally, the relative position of the Fovea Palatinae to the vibrating line was recorded as being anterior, posterior, or on the vibrating line. The Chi Square test, the effect size measures (Eta and Cramer's V tests), The Spearman's Rho rank correlation test, and multinominal logistic regression analysis were utilized to analyse the data. House classification percentages were measured among people whose Fovea Palatinae was detectable; Class II palate was the most prevalent (47.14%), followed by Class I (43.93%), and then Class III (8.93%). Based on vibrating line position, 129 (58%) had a vibrating line anterior to Fovea Palatinae, 57 (26%) on the Fovea Palatinae, 36 (16%) posterior to Fovea Palatinae, and in 58 (21%) Fovea Palatinae were not detected. The mean distance between the vibrating line and Fovea Palatinae was 3.66 ± 1.6 mm anteriorly and 2.97 ± 1.36 mm posteriorly. No significant differences were found between males and females in regard to House classification and vibrating line position. The odds of having the fovea posterior to the vibrating line would increase by 5% for each year increase in the age (P = 0.035, odds ratio = 1.050). Class II House classification of the soft palate was found to be the most prevalent among the study participants. Also, the vibrating line was anterior to the Fovea Palatinae in the majority of cases. The odds of having the fovea posterior to the vibrating line would increase by age. The Fovea Palatinae could be considered a useful guide for locating the vibrating line.
Collapse
Affiliation(s)
- Wijdan R Elmanaseer
- Department of Fixed and Removable Prosthodontics, School of Dentistry, University of Jordan, Amman, 11942, Jordan.
| | - Rasha A Alamoush
- Department of Fixed and Removable Prosthodontics, School of Dentistry, University of Jordan, Amman, 11942, Jordan
| | - Firas Alsoleihat
- Department of Restorative Dentistry, School of Dentistry, University of Jordan, Amman, 11942, Jordan
| | - Mahmoud K Al-Omiri
- Department of Fixed and Removable Prosthodontics, School of Dentistry, University of Jordan, Amman, 11942, Jordan
- Department of Prosthodontics, The City of London Dental School, Canada Water, Lower Road, London, UK
| |
Collapse
|
27
|
Awan WA, Islam T, N. Alsunaydih F, Alsaleem F, Alhassoonc K. Dual-band MIMO antenna with low mutual coupling for 2.4/5.8 GHz communication and wearable technologies. PLoS One 2024; 19:e0301924. [PMID: 38630765 PMCID: PMC11023486 DOI: 10.1371/journal.pone.0301924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Accepted: 03/25/2024] [Indexed: 04/19/2024] Open
Abstract
To satisfy the requirements of modern communication systems and wearables using 2.4/5.8 GHz band this paper presents a simple, compact, and dual-band solution. The antenna is extracted from a circular monopole by inserting various patches and stubs. The genetic algorithm is utilized to optimize the parameters and achieve the best possible results regarding bandwidth and gain. Afterward, a 2-port multiple-input-multiple-output (MIMO) configuration is created by positioning an identical second single element perpendicularly to the first one. The electrical size of the suggested MIMO configuration is 0.26 λL × 0.53 λL, where λL represents the free space wavelength at lower resonance of 2.45 GHz. The common ground technique is adopted to further reduce and achieve the accepted level of mutual coupling of the MIMO configuration. The presented MIMO antenna offers a low mutual coupling of < -27 dB with 0.2 envelope correlation coefficient (ECC). The antenna has a gain of around 6.2 dBi and 6.5 dBi at resonating frequencies of 2.45 GHz and 5.4 GHz. Furthermore, the specific absorption rate (SAR) analysis of the MIMO antenna offers a range inside of the standard values, showing its potential for On/Off body communications. The comparison with already published works shows that the proposed antenna achieves better results in either compact size or wide operational bandwidth along with low mutual coupling.
Collapse
Affiliation(s)
- Wahaj Abbas Awan
- Department of Information and Communication Engineering, Chungbuk National University, Cheongju, South Korea
| | - Tanvir Islam
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, United States of America
| | - Fahad N. Alsunaydih
- Department of Electrical Engineering, College of Engineering, Qassim University, Unaizah, Saudi Arabia
| | - Fahd Alsaleem
- Department of Electrical Engineering, College of Engineering, Qassim University, Unaizah, Saudi Arabia
| | - Khaled Alhassoonc
- Department of Electrical Engineering, College of Engineering, Qassim University, Unaizah, Saudi Arabia
| |
Collapse
|
28
|
Lin H, Lee HW, Yip TCF, Tsochatzis E, Petta S, Bugianesi E, Yoneda M, Zheng MH, Hagström H, Boursier J, Calleja JL, Goh GBB, Chan WK, Gallego-Durán R, Sanyal AJ, de Lédinghen V, Newsome PN, Fan JG, Castéra L, Lai M, Harrison SA, Fournier-Poizat C, Wong GLH, Pennisi G, Armandi A, Nakajima A, Liu WY, Shang Y, de Saint-Loup M, Llop E, Teh KKJ, Lara-Romero C, Asgharpour A, Mahgoub S, Chan MSW, Canivet CM, Romero-Gomez M, Kim SU, Wong VWS. Vibration-Controlled Transient Elastography Scores to Predict Liver-Related Events in Steatotic Liver Disease. JAMA 2024; 331:1287-1297. [PMID: 38512249 PMCID: PMC10958386 DOI: 10.1001/jama.2024.1447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 01/30/2024] [Indexed: 03/22/2024]
Abstract
Importance Metabolic dysfunction-associated steatotic liver disease (MASLD) is currently the most common chronic liver disease worldwide. It is important to develop noninvasive tests to assess the disease severity and prognosis. Objective To study the prognostic implications of baseline levels and dynamic changes of the vibration-controlled transient elastography (VCTE)-based scores developed for the diagnosis of advanced fibrosis (Agile 3+) and cirrhosis (Agile 4) in patients with MASLD. Design, Setting, and Participants This cohort study included data from a natural history cohort of patients with MASLD who underwent VCTE examination at 16 tertiary referral centers in the US, Europe, and Asia from February 2004 to January 2023, of which the data were collected prospectively at 14 centers. Eligible patients were adults aged at least 18 years with hepatic steatosis diagnosed by histologic methods (steatosis in ≥5% of hepatocytes) or imaging studies (ultrasonography, computed tomography or magnetic resonance imaging, or controlled attenuation parameter ≥248 dB/m by VCTE). Main Outcomes and Measures The primary outcome was liver-related events (LREs), defined as hepatocellular carcinoma or hepatic decompensation (ascites, variceal hemorrhage, hepatic encephalopathy, or hepatorenal syndrome), liver transplant, and liver-related deaths. The Agile scores were compared with histologic and 8 other noninvasive tests. Results A total of 16 603 patients underwent VCTE examination at baseline (mean [SD] age, 52.5 [13.7] years; 9600 [57.8%] were male). At a median follow-up of 51.7 (IQR, 25.2-85.2) months, 316 patients (1.9%) developed LREs. Both Agile 3+ and Agile 4 scores classified fewer patients between the low and high cutoffs than most fibrosis scores and achieved the highest discriminatory power in predicting LREs (integrated area under the time-dependent receiver-operating characteristic curve, 0.89). A total of 10 920 patients (65.8%) had repeated VCTE examination at a median interval of 15 (IQR, 11.3-27.7) months and were included in the serial analysis. A total of 81.9% of patients (7208 of 8810) had stable Agile 3+ scores and 92.6% of patients (8163 of 8810) had stable Agile 4 scores (same risk categories at both assessments). The incidence of LREs was 0.6 per 1000 person-years in patients with persistently low Agile 3+ scores and 30.1 per 1000 person-years in patients with persistently high Agile 3+ scores. In patients with high Agile 3+ score at baseline, a decrease in the score by more than 20% was associated with substantial reduction in the risk of LREs. A similar trend was observed for the Agile 4 score, although it missed more LREs in the low-risk group. Conclusions and Relevance Findings of this study suggest that single or serial Agile scores are highly accurate in predicting LREs in patients with MASLD, making them suitable alternatives to liver biopsy in routine clinical practice and in phase 2b and 3 clinical trials for steatohepatitis.
Collapse
Affiliation(s)
- Huapeng Lin
- Medical Data Analytics Centre, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China
- State Key Laboratory of Digestive Disease, Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong, China
| | - Hye Won Lee
- Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Terry Cheuk-Fung Yip
- Medical Data Analytics Centre, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China
- State Key Laboratory of Digestive Disease, Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong, China
| | - Emmanuel Tsochatzis
- University College London Institute for Liver and Digestive Health, Royal Free Hospital and UCL, London, United Kingdom
| | - Salvatore Petta
- Sezione di Gastroenterologia, PROMISE, University of Palermo, Italy
| | - Elisabetta Bugianesi
- Department of Medical Sciences, Division of Gastroenterology and Hepatology, A.O.U. Città della Salute e della Scienza di Torino, University of Turin, Turin, Italy
| | - Masato Yoneda
- Department of Gastroenterology and Hepatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Ming-Hua Zheng
- MAFLD Research Center, Department of Hepatology, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Hannes Hagström
- Department of Medicine, Huddinge, Karolinska Institutet, Sweden
- Division of Hepatology, Department of Upper GI Diseases, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Jérôme Boursier
- Hepato-Gastroenterology and Digestive Oncology Department, Angers University Hospital, Angers, France
- HIFIH Laboratory, SFR ICAT 4208, Angers University, Angers, France
| | - José Luis Calleja
- Department of Gastroenterology and Hepatology, Hospital Universitario Puerta de Hierro Majadahonda, Madrid, Spain
| | - George Boon-Bee Goh
- Department of Gastroenterology and Hepatology, Singapore General Hospital, Singapore
| | - Wah-Kheong Chan
- Gastroenterology and Hepatology Unit, Department of Medicine, Faculty of Medicine, University of Malaya, Malaysia
| | - Rocio Gallego-Durán
- Digestive Diseases Unit and CIBERehd, Virgen Del Rocío University Hospital, Seville, Spain
| | - Arun J. Sanyal
- Stravitz-Sanyal Institute for Liver Disease and Metabolic Health, VCU School of Medicine, Richmond, Virginia
| | - Victor de Lédinghen
- Centre d’Investigation de la Fibrose Hépatique, Haut-Lévêque Hospital, University Hospital of Bordeaux, Pessac, France
| | - Philip N. Newsome
- National Institute for Health Research, Biomedical Research Centre at University Hospitals Birmingham NHS Foundation Trust and the University of Birmingham, Birmingham, United Kingdom
| | - Jian-Gao Fan
- Department of Gastroenterology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai Key Lab of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Laurent Castéra
- Université Paris Cité, UMR1149 (CRI), INSERM, Paris, France; Service d’Hépatologie, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris (AP-HP), Clichy, France
| | - Michelle Lai
- Division of Gastroenterology & Hepatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Stephen A. Harrison
- Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
- Pinnacle Clinical Research, San Antonio, Texas
| | | | - Grace Lai-Hung Wong
- Medical Data Analytics Centre, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China
- State Key Laboratory of Digestive Disease, Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong, China
| | - Grazia Pennisi
- Sezione di Gastroenterologia, PROMISE, University of Palermo, Italy
| | - Angelo Armandi
- Department of Medical Sciences, Division of Gastroenterology and Hepatology, A.O.U. Città della Salute e della Scienza di Torino, University of Turin, Turin, Italy
| | - Atsushi Nakajima
- Department of Gastroenterology and Hepatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Wen-Yue Liu
- Department of Endocrinology, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Ying Shang
- Department of Medicine, Huddinge, Karolinska Institutet, Sweden
| | - Marc de Saint-Loup
- Hepato-Gastroenterology and Digestive Oncology Department, Angers University Hospital, Angers, France
| | - Elba Llop
- Department of Gastroenterology and Hepatology, Hospital Universitario Puerta de Hierro Majadahonda, Madrid, Spain
| | - Kevin Kim-Jun Teh
- Department of Gastroenterology and Hepatology, Singapore General Hospital, Singapore
| | - Carmen Lara-Romero
- Digestive Diseases Unit and CIBERehd, Virgen Del Rocío University Hospital, Seville, Spain
| | - Amon Asgharpour
- Stravitz-Sanyal Institute for Liver Disease and Metabolic Health, VCU School of Medicine, Richmond, Virginia
| | - Sara Mahgoub
- National Institute for Health Research, Biomedical Research Centre at University Hospitals Birmingham NHS Foundation Trust and the University of Birmingham, Birmingham, United Kingdom
| | | | - Clemence M. Canivet
- Hepato-Gastroenterology and Digestive Oncology Department, Angers University Hospital, Angers, France
- HIFIH Laboratory, SFR ICAT 4208, Angers University, Angers, France
| | - Manuel Romero-Gomez
- Digestive Diseases Unit and CIBERehd, Virgen Del Rocío University Hospital, Seville, Spain
| | - Seung Up Kim
- Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Vincent Wai-Sun Wong
- Medical Data Analytics Centre, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China
- State Key Laboratory of Digestive Disease, Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong, China
| |
Collapse
|
29
|
Castillo B, Marulanda J, Thomson P. Experimental Evaluation of Pedestrian-Induced Multiaxial Gait Loads on Footbridges: Effects of the Structure-to-Human Interaction by Lateral Vibrating Platforms. Sensors (Basel) 2024; 24:2517. [PMID: 38676134 PMCID: PMC11054870 DOI: 10.3390/s24082517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/27/2024] [Accepted: 03/01/2024] [Indexed: 04/28/2024]
Abstract
The introduction of resistant and lightweight materials in the construction industry has led to civil structures being vulnerable to excessive vibrations, particularly in footbridges exposed to human-induced gait loads. This interaction, known as Human-Structure Interaction (HSI), involves a complex interplay between structural vibrations and gait loads. Despite extensive research on HSI, the simultaneous effects of lateral structural vibrations with fundamental frequencies close to human gait frequency (around 1.0 Hz) and wide amplitudes (over 30.0 mm) remain inadequately understood, posing a contemporary structural challenge highlighted by incidents in iconic bridges like the Millennium Bridge in London, Solferino Bridge in Paris, and Premier Bridge in Cali, Colombia. This paper focuses on the experimental exploration of Structure-to-Human Interaction (S2HI) effects using the Human-Structure Interaction Multi-Axial Test Framework (HSI-MTF). The framework enables the simultaneous measurement of vertical and lateral loads induced by human gait on surfaces with diverse frequency ranges and wide-amplitude lateral harmonic motions. The study involved seven test subjects, evaluating gait loads on rigid and harmonic lateral surfaces with displacements ranging from 5.0 to 50.0 mm and frequency content from 0.70 to 1.30 Hz. A low-cost vision-based motion capture system with smartphones analyzed the support (Tsu) and swing (Tsw) periods of human gait. Results indicated substantial differences in Tsu and Tsw on lateral harmonic protocols, reaching up to 96.53% and 58.15%, respectively, compared to rigid surfaces. Normalized lateral loads (LL) relative to the subject's weight (W0) exhibited a linear growth proportional to lateral excitation frequency, with increased proportionality constants linked to higher vibration amplitudes. Linear regressions yielded an average R2 of 0.815. Regarding normalized vertical load (LV) with respect to W0, a consistent behavior was observed for amplitudes up to 30.0 mm, beyond which a linear increase, directly proportional to frequency, resulted in a 28.3% increment compared to rigid surfaces. Correlation analyses using Pearson linear coefficients determined relationships between structural surface vibration and pedestrian lateral motion, providing valuable insights into Structure-to-Human Interaction dynamics.
Collapse
Affiliation(s)
- Bryan Castillo
- School of Civil and Geomatic Engineering, University of Valley, Cali 760001, Colombia; (J.M.); (P.T.)
| | | | | |
Collapse
|
30
|
Dong Y, Noh HY. Ubiquitous Gait Analysis through Footstep-Induced Floor Vibrations. Sensors (Basel) 2024; 24:2496. [PMID: 38676114 PMCID: PMC11053483 DOI: 10.3390/s24082496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 04/05/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024]
Abstract
Quantitative analysis of human gait is critical for the early discovery, progressive tracking, and rehabilitation of neurological and musculoskeletal disorders, such as Parkinson's disease, stroke, and cerebral palsy. Gait analysis typically involves estimating gait characteristics, such as spatiotemporal gait parameters and gait health indicators (e.g., step time, length, symmetry, and balance). Traditional methods of gait analysis involve the use of cameras, wearables, and force plates but are limited in operational requirements when applied in daily life, such as direct line-of-sight, carrying devices, and dense deployment. This paper introduces a novel approach for gait analysis by passively sensing floor vibrations generated by human footsteps using vibration sensors mounted on the floor surface. Our approach is low-cost, non-intrusive, and perceived as privacy-friendly, making it suitable for continuous gait health monitoring in daily life. Our algorithm estimates various gait parameters that are used as standard metrics in medical practices, including temporal parameters (step time, stride time, stance time, swing time, double-support time, and single-support time), spatial parameters (step length, width, angle, and stride length), and extracts gait health indicators (cadence/walking speed, left-right symmetry, gait balance, and initial contact types). The main challenge we addressed in this paper is the effect of different floor types on the resultant vibrations. We develop floor-adaptive algorithms to extract features that are generalizable to various practical settings, including homes, hospitals, and eldercare facilities. We evaluate our approach through real-world walking experiments with 20 adults with 12,231 labeled gait cycles across concrete and wooden floors. Our results show 90.5% (RMSE 0.08s), 71.3% (RMSE 0.38m), and 92.3% (RMSPE 7.7%) accuracy in estimating temporal, spatial parameters, and gait health indicators, respectively.
Collapse
Affiliation(s)
- Yiwen Dong
- Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, USA;
| | | |
Collapse
|
31
|
Pfenninger C, Zeghoudi N, Bertrand MF, Lapole T. Effects of prolonged vibration to the flexor carpi radialis muscle on intracortical excitability. Sci Rep 2024; 14:8475. [PMID: 38605084 PMCID: PMC11009410 DOI: 10.1038/s41598-024-59255-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 04/08/2024] [Indexed: 04/13/2024] Open
Abstract
Prolonged local vibration (LV) can induce neurophysiological adaptations thought to be related to long-term potentiation or depression. Yet, how changes in intracortical excitability may be involved remains to be further investigated as previous studies reported equivocal results. We therefore investigated the effects of 30 min of LV applied to the right flexor carpi radialis muscle (FCR) on both short-interval intracortical inhibition (SICI) and intracortical facilitation (ICF). SICI and ICF were measured through transcranial magnetic stimulation before and immediately after 30 min of FCR LV (vibration condition) or 30 min of rest (control condition). Measurements were performed during a low-intensity contraction (n = 17) or at rest (n = 7). No significant SICI nor ICF modulations were observed, whether measured during isometric contractions or at rest (p = 0.2). Yet, we observed an increase in inter-individual variability for post measurements after LV. In conclusion, while intracortical excitability was not significantly modulated after LV, increased inter-variability observed after LV may suggest the possibility of divergent responses to prolonged LV exposure.
Collapse
Affiliation(s)
- Clara Pfenninger
- Laboratoire Interuniversitaire de Biologie de la Motricité, Université Jean Monnet Saint-Etienne, Lyon 1, Université Savoie Mont-Blanc, 42023, Saint-Étienne, France
| | - Narimane Zeghoudi
- Laboratoire Interuniversitaire de Biologie de la Motricité, Université Jean Monnet Saint-Etienne, Lyon 1, Université Savoie Mont-Blanc, 42023, Saint-Étienne, France
| | - Mathilde Fiona Bertrand
- Laboratoire Interuniversitaire de Biologie de la Motricité, Université Jean Monnet Saint-Etienne, Lyon 1, Université Savoie Mont-Blanc, 42023, Saint-Étienne, France
| | - Thomas Lapole
- Laboratoire Interuniversitaire de Biologie de la Motricité, Université Jean Monnet Saint-Etienne, Lyon 1, Université Savoie Mont-Blanc, 42023, Saint-Étienne, France.
| |
Collapse
|
32
|
Vallejo-Marin M, Russell AL. Harvesting pollen with vibrations: towards an integrative understanding of the proximate and ultimate reasons for buzz pollination. Ann Bot 2024; 133:379-398. [PMID: 38071461 PMCID: PMC11006549 DOI: 10.1093/aob/mcad189] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 12/08/2023] [Indexed: 04/12/2024]
Abstract
Buzz pollination, a type of interaction in which bees use vibrations to extract pollen from certain kinds of flowers, captures a close relationship between thousands of bee and plant species. In the last 120 years, studies of buzz pollination have contributed to our understanding of the natural history of buzz pollination, and basic properties of the vibrations produced by bees and applied to flowers in model systems. Yet, much remains to be done to establish its adaptive significance and the ecological and evolutionary dynamics of buzz pollination across diverse plant and bee systems. Here, we review for bees and plants the proximate (mechanism and ontogeny) and ultimate (adaptive significance and evolution) explanations for buzz pollination, focusing especially on integrating across these levels to synthesize and identify prominent gaps in our knowledge. Throughout, we highlight new technical and modelling approaches and the importance of considering morphology, biomechanics and behaviour in shaping our understanding of the adaptive significance of buzz pollination. We end by discussing the ecological context of buzz pollination and how a multilevel perspective can contribute to explain the proximate and evolutionary reasons for this ancient bee-plant interaction.
Collapse
Affiliation(s)
- Mario Vallejo-Marin
- Department of Ecology and Genetics, Uppsala University, Uppsala, 752 36, Sweden
| | - Avery L Russell
- Department of Biology, Missouri State University, Springfield, MO, 65897, USA
| |
Collapse
|
33
|
O’Connell-Rodwell CE, Berezin JL, Dharmarajan A, Ravicz ME, Hu Y, Guan X, O’Connor KN, Puria S. The impact of size on middle-ear sound transmission in elephants, the largest terrestrial mammal. PLoS One 2024; 19:e0298535. [PMID: 38598472 PMCID: PMC11006165 DOI: 10.1371/journal.pone.0298535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 01/25/2024] [Indexed: 04/12/2024] Open
Abstract
Elephants have a unique auditory system that is larger than any other terrestrial mammal. To quantify the impact of larger middle ear (ME) structures, we measured 3D ossicular motion and ME sound transmission in cadaveric temporal bones from both African and Asian elephants in response to air-conducted (AC) tonal pressure stimuli presented in the ear canal (PEC). Results were compared to similar measurements in humans. Velocities of the umbo (VU) and stapes (VST) were measured using a 3D laser Doppler vibrometer in the 7-13,000 Hz frequency range, stapes velocity serving as a measure of energy entering the cochlea-a proxy for hearing sensitivity. Below the elephant ME resonance frequency of about 300 Hz, the magnitude of VU/PEC was an order of magnitude greater than in human, and the magnitude of VST/PEC was 5x greater. Phase of VST/PEC above ME resonance indicated that the group delay in elephant was approximately double that of human, which may be related to the unexpectedly high magnitudes at high frequencies. A boost in sound transmission across the incus long process and stapes near 9 kHz was also observed. We discuss factors that contribute to differences in sound transmission between these two large mammals.
Collapse
Affiliation(s)
- Caitlin E. O’Connell-Rodwell
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, United States of America
- Department of Otolaryngology, Head & Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jodie L. Berezin
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Anbuselvan Dharmarajan
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Michael E. Ravicz
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, United States of America
- Department of Otolaryngology, Head & Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Yihan Hu
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Xiying Guan
- School of Medicine, Wayne State University, Detroit, Michigan, United States of America
| | - Kevin N. O’Connor
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Sunil Puria
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, United States of America
- Department of Otolaryngology, Head & Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States of America
- Graduate Program in Speech and Hearing and Biosciences and Technologies, Harvard Medical School, Boston, Massachusetts, United States of America
| |
Collapse
|
34
|
Hou S, Li B, Zhu D, Ye H, Zhang C. Research on the model of staggered tooth phase to reduce vibration of single-stage gear transmission system: Theoretical analysis and experiments. PLoS One 2024; 19:e0297936. [PMID: 38578717 PMCID: PMC10997131 DOI: 10.1371/journal.pone.0297936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 01/14/2024] [Indexed: 04/07/2024] Open
Abstract
Aiming at the problems of high vibration and high noise in gear transmission systems, a model of gear with staggered tooth phase structure(GSTPS) for reducing vibration is proposed. Without changing the overall structure of the gear transmission system, the purpose of reducing mesh stiffness fluctuations is achieved by staggering adjacent gears at a certain angle along the axis, thereby the vibration of the gear transmission system could be reduced. The characterization method of time-varying mesh stiffness of the GSTPS is studied. Then, the impact of different staggered tooth phases(STP) on reducing vibration of the transmission system are researched, and the basis for selecting the optimal STP are obtained. The experimental platform for reducing vibration with STP is established. And some experimental studies were conducted to validate the theoretical model.
Collapse
Affiliation(s)
- Shaoshuai Hou
- School of Intelligent Manufacturing, Luoyang Institute of Science and Technology, Luoyang, Henan, China
- State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, China
| | - Bin Li
- School of Intelligent Manufacturing, Luoyang Institute of Science and Technology, Luoyang, Henan, China
| | - Derong Zhu
- School of Intelligent Manufacturing, Luoyang Institute of Science and Technology, Luoyang, Henan, China
| | - Haichao Ye
- School of Intelligent Manufacturing, Luoyang Institute of Science and Technology, Luoyang, Henan, China
| | - Chunpeng Zhang
- School of Machinery and Automation, Weifang University, Weifang, Shandong, China
| |
Collapse
|
35
|
Siedenburg K, Bürgel M, Özgür E, Scheicht C, Töpken S. Vibrotactile enhancement of musical engagement. Sci Rep 2024; 14:7764. [PMID: 38565622 PMCID: PMC10987628 DOI: 10.1038/s41598-024-57961-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 03/23/2024] [Indexed: 04/04/2024] Open
Abstract
Sound is sensed by the ear but can also be felt on the skin, by means of vibrotactile stimulation. Only little research has addressed perceptual implications of vibrotactile stimulation in the realm of music. Here, we studied which perceptual dimensions of music listening are affected by vibrotactile stimulation and whether the spatial segregation of vibrations improves vibrotactile stimulation. Forty-one listeners were presented with vibrotactile stimuli via a chair's surfaces (left and right arm rests, back rest, seat) in addition to music presented over headphones. Vibrations for each surface were derived from individual tracks of the music (multi condition) or conjointly by a mono-rendering, in addition to incongruent and headphones-only conditions. Listeners evaluated unknown music from popular genres according to valence, arousal, groove, the feeling of being part of a live performance, the feeling of being part of the music, and liking. Results indicated that the multi- and mono vibration conditions robustly enhanced the nature of the musical experience compared to listening via headphones alone. Vibrotactile enhancement was strong in the latent dimension of 'musical engagement', encompassing the sense of being a part of the music, arousal, and groove. These findings highlight the potential of vibrotactile cues for creating intensive musical experiences.
Collapse
Affiliation(s)
- Kai Siedenburg
- Graz University of Technology, Signal Processing and Speech Communication Laboratory, 8010, Graz, Austria.
- Department of Medical Physics and Acoustics, Carl von Ossietzy Universität Oldenburg, 26129, Oldenburg, Germany.
| | - Michel Bürgel
- Department of Medical Physics and Acoustics, Carl von Ossietzy Universität Oldenburg, 26129, Oldenburg, Germany
| | - Elif Özgür
- Department of Medical Physics and Acoustics, Carl von Ossietzy Universität Oldenburg, 26129, Oldenburg, Germany
| | - Christoph Scheicht
- Department of Medical Physics and Acoustics, Carl von Ossietzy Universität Oldenburg, 26129, Oldenburg, Germany
| | - Stephan Töpken
- Department of Medical Physics and Acoustics, Carl von Ossietzy Universität Oldenburg, 26129, Oldenburg, Germany
| |
Collapse
|
36
|
van Leeuwen R. From S-matrix theory to strings: Scattering data and the commitment to non-arbitrariness. Stud Hist Philos Sci 2024; 104:130-149. [PMID: 38518509 DOI: 10.1016/j.shpsa.2023.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/15/2023] [Accepted: 12/18/2023] [Indexed: 03/24/2024]
Abstract
The early history of string theory is marked by a shift from strong interaction physics to quantum gravity. The first string models and associated theoretical framework were formulated in the late 1960s and early 1970s in the context of the S-matrix program for the strong interactions. In the mid-1970s, the models were reinterpreted as a potential theory unifying the four fundamental forces. This paper provides a historical analysis of how string theory was developed out of S-matrix physics, aiming to clarify how modern string theory, as a theory detached from experimental data, grew out of an S-matrix program that was strongly dependent upon observable quantities. Surprisingly, the theoretical practice of physicists already turned away from experiment before string theory was recast as a potential unified quantum gravity theory. With the formulation of dual resonance models (the "hadronic string theory"), physicists were able to determine almost all of the models' parameters on the basis of theoretical reasoning. It was this commitment to "non-arbitrariness", i.e., a lack of free parameters in the theory, that initially drove string theorists away from experimental input, and not the practical inaccessibility of experimental data in the context of quantum gravity physics. This is an important observation when assessing the role of experimental data in string theory.
Collapse
Affiliation(s)
- Robert van Leeuwen
- Institute for Theoretical Physics, Vossius Center for History of the Humanities and the Sciences, University of Amsterdam, P.O. Box 94485, 1090 GL, Amsterdam, the Netherlands.
| |
Collapse
|
37
|
Avhad A, Wilson A, Sayce L, Li Z, Rousseau B, Doyle JF, Luo H. An Integrated Experimental-Computational Study of Vocal Fold Vibration in Type I Thyroplasty. J Biomech Eng 2024; 146:041006. [PMID: 38319186 PMCID: PMC11005858 DOI: 10.1115/1.4064662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 01/30/2024] [Accepted: 01/31/2024] [Indexed: 02/07/2024]
Abstract
Subject-specific computational modeling of vocal fold (VF) vibration was integrated with an ex vivo animal experiment of type 1 thyroplasty to study the effect of the implant on the vocal fold vibration. In the experiment, a rabbit larynx was used to simulate type 1 thyroplasty, where one side of the vocal fold was medialized with a trans-muscular suture while the other side was medialized with a silastic implant. Vocal fold vibration was then achieved by flowing air through the larynx and was filmed with a high-speed camera. The three-dimensional computational model was built upon the pre-operative scan of the laryngeal anatomy. This subject-specific model was used to simulate the vocal fold medialization and then the fluid-structure interaction (FSI) of the vocal fold. Model validation was done by comparing the vocal fold displacement with postoperative scan (for medialization), and by comparing the vibratory characteristics with the high-speed images (for vibration). These comparisons showed the computational model successfully captured the effect of the implant and thus has the potential for presurgical planning.
Collapse
Affiliation(s)
- Amit Avhad
- Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37221
- Vanderbilt University
| | - Azure Wilson
- Department of Communication Science and Disorders, University of Pittsburgh, Pittsburgh, PA 15260
- University of Pittsburgh
| | - Lea Sayce
- Department of Communication Science and Disorders, University of Pittsburgh, Pittsburgh, PA 15260
- University of Pittsburgh
| | - Zheng Li
- Mechatronics Engineering Department, Morgan State University, Baltimore, MD 21251
- Morgan State University
| | - Bernard Rousseau
- Doisy College of Health Sciences, Saint Louis University, Saint Louis, MO 63103
- Saint Louis University
| | - James F Doyle
- School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907
- Purdue University West Lafayette
| | - Haoxiang Luo
- Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235-1592
| |
Collapse
|
38
|
Dierberger H, Pieper L, Jung M, Schulze M. Vibration emissions affect the quality of liquid-preserved AI doses in stallions. Theriogenology 2024; 218:1-7. [PMID: 38280300 DOI: 10.1016/j.theriogenology.2024.01.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/16/2024] [Accepted: 01/16/2024] [Indexed: 01/29/2024]
Abstract
Artificial insemination (AI) with liquid-preserved stallion semen is a widely used reproductive technology. As the demand for AI doses of high-class stallions is transnational, they are frequently exposed to long-distance transport. Since recent studies in boars indicated that vibration emissions caused by transport negatively affected sperm quality in vitro, this study questioned whether sperm quality in stallions is similarly impaired. Furthermore, we investigated stallion and extender-related differences in the spermatozoa's resistance to transport-related quality loss. Stallion ejaculates (n = 30) were collected at a German AI center, split in half, and subsequently diluted to a final sperm concentration of 50 × 106 sperm/mL using the semen extenders EquiPlus or Gent (both Minitüb GmbH, Germany). Four 12 mL aliquots of each sample were filled in plastic syringes according to a split-sample design and exposed to vibration (Displacement index Di = 3.0 ± 0.1) at 5 °C for 0 h (control), 3 h, 6 h or 9 h. All samples were stored for four days at 5 °C after transport simulation and analyzed for total sperm motility, thermo-resistance, membrane integrity, and mitochondrial activity determined by flow cytometry as well as the pH. After calculating generalized linear mixed models for each sperm quality trait, a negative impact of the duration of transport simulation could be shown on total sperm motility (P = 0.001), thermo-resistance (P = 0.030), and the pH (P = 0.001). Simulated transport for 6 h and 9 h diminished sperm quality (P ≤ 0.01), with 9 h reducing thermo-resistance by 5 ± 2.2% points (PP) for EquiPlus and sperm motility by 2.2 ± 1.7 PP for Gent compared to the control group. In contrast, samples exposed to vibration for 3 h showed no decline in sperm quality (P > 0.05). The individual stallion influenced every semen trait (P < 0.05) and transport-related losses in sperm thermo-resistance of up to 15.9 PP were demonstrated. Furthermore, EquiPlus was superior to Gent in all semen assessments (P < 0.001). We conclude that in vitro sperm quality is impaired by vibration. As the quality loss depends on the transport time, we recommend keeping shipping time as short as possible especially for spermatozoa of stallions that are susceptible to vibration-induced sperm quality loss.
Collapse
Affiliation(s)
- Hannah Dierberger
- Institute for Reproduction of Farm Animals Schönow, Bernauer Allee 10, D-16321, Bernau, Germany
| | - Laura Pieper
- Institute for Reproduction of Farm Animals Schönow, Bernauer Allee 10, D-16321, Bernau, Germany
| | - Markus Jung
- Institute for Reproduction of Farm Animals Schönow, Bernauer Allee 10, D-16321, Bernau, Germany
| | - Martin Schulze
- Institute for Reproduction of Farm Animals Schönow, Bernauer Allee 10, D-16321, Bernau, Germany.
| |
Collapse
|
39
|
Jalilvand S, Mousavi H. Vibration spectra of DNA and RNA segments. Eur Biophys J 2024; 53:95-109. [PMID: 38265690 DOI: 10.1007/s00249-023-01699-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 12/17/2023] [Accepted: 12/23/2023] [Indexed: 01/25/2024]
Abstract
The dispersion curves and density of states are used to analyze the vibrational characteristics of DNA and RNA segments. This is done using a harmonic Hamiltonian and the Green's function technique. Two configurations of DNA and RNA, finite and cyclic, have been investigated and compared to their infinite counterparts. For the DNA molecule, three models, including a fishbone model, a ldder model, and a fishbone ladder model, have been employed, while the RNA molecule has been represented using a half fishbone model. To enhance the realism of DNA and RNA simulations, the unit cells within each infinite system as well as the length of the finite and cyclic cases are gradually enlarged. The connections between the sub-sites have been modeled using linear springs, where the stiffness of the vertical springs exhibits random variations throughout the length of the DNA and RNA models. Shorter DNA and RNA segments exhibit additional peaks in their density of states, resulting in more bands in dispersion curves. This indicates that as the number of building blocks grows in these segments, their curves resemble those of infinite systems. These findings have practical implications for studying the vibration characteristics of similar macro-systems.
Collapse
Affiliation(s)
| | - Hamze Mousavi
- Department of Physics, Razi University, Kermanshah, Iran.
| |
Collapse
|
40
|
Yüksel MB, Atik AC, Külah H. Piezoelectric Multi-Channel Bilayer Transducer for Sensing and Filtering Ossicular Vibration. Adv Sci (Weinh) 2024; 11:e2308277. [PMID: 38380504 DOI: 10.1002/advs.202308277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/10/2024] [Indexed: 02/22/2024]
Abstract
This paper presents an acoustic transducer for fully implantable cochlear implants (FICIs), which can be implanted on the hearing chain to detect and filter the ambient sound in eight frequency bands between 250 and 6000 Hz. The transducer dimensions are conventional surgery compatible. The structure is formed with 3 × 3 × 0.36 mm active space for each layer and 5.2 mg total active mass excluding packaging. Characterization of the transducer is carried on an artificial membrane whose vibration characteristic is similar to the umbo vibration. On the artificial membrane, piezoelectric transducer generates up to 320.3 mVpp under 100 dB sound pressure level (SPL) excitation and covers the audible acoustic frequency. The measured signal-to-noise-ratio (SNR) of the channels is up to 84.2 dB. Sound quality of the transducer for fully implantable cochlear implant application is graded with an objective qualification method (PESQ) for the first time in the literature to the best of the knowledge, and scored 3.42/4.5.
Collapse
Affiliation(s)
- Muhammed Berat Yüksel
- Department of Electrical and Electronics Engineering, Middle East Technical University (METU), Universiteler Mah. Dumlipinar Blv. No:1, Ankara, 06800, Turkey
- METU MEMS Center, Mustafa Kemal Mah, Dumlupınar Bulvarı No: 280, Ankara, 06350, Turkey
| | - Ali Can Atik
- Department of Electrical and Electronics Engineering, Middle East Technical University (METU), Universiteler Mah. Dumlipinar Blv. No:1, Ankara, 06800, Turkey
- METU MEMS Center, Mustafa Kemal Mah, Dumlupınar Bulvarı No: 280, Ankara, 06350, Turkey
| | - Haluk Külah
- Department of Electrical and Electronics Engineering, Middle East Technical University (METU), Universiteler Mah. Dumlipinar Blv. No:1, Ankara, 06800, Turkey
- METU MEMS Center, Mustafa Kemal Mah, Dumlupınar Bulvarı No: 280, Ankara, 06350, Turkey
| |
Collapse
|
41
|
Liu J, Zhang H, Gao Y, Yu Z, Cong C, Wei X, Yang Q. Reinforcement hybridization in staggered composites enhances wave attenuation performance. J Mech Behav Biomed Mater 2024; 152:106435. [PMID: 38340479 DOI: 10.1016/j.jmbbm.2024.106435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/23/2024] [Accepted: 01/26/2024] [Indexed: 02/12/2024]
Abstract
Advanced composites with superior wave attenuation or vibration isolation capacity are in high demand in engineering practice. In this study, we develop the hybrid dynamic shear-lag model with Bloch's theorem to investigate the hybrid effect of reinforcement on wave attenuation in bioinspired staggered composites. We present for the first time the relationship between macroscopic wave filtering and hybridization of building blocks in staggered composites. Viscoelasticity was taken into account for both reinforcement and matrix to reflect the damping effect on wave transmission. Our findings indicate that reinforcement hybridization significantly enhances wave attenuation performance through two critical parameters: the linear stiffness and linear density of reinforcements. For purely elastic constituents, reinforcement hybridization consistently improves wave attenuation by reducing the initial frequency of the first bandgap and broadening it. For viscoelastic constituents, increasing the heterogeneity of reinforcements can benefit wave attenuation, particularly in ultralow frequency regimes, due to the strengthening of the damping effect. Our case study demonstrates that controlling the difference in linear density can result in up to a 59 % reduction in energy transmission. Our analysis suggests that hybridizing reinforcements could provide a new approach to designing and synthesizing advanced composites with exceptional wave attenuation performance.
Collapse
Affiliation(s)
- Junjie Liu
- Department of Engineering Mechanics, School of Mathematics, Statistics and Mechanics, Beijing University of Technology, Beijing, 100124, China.
| | - Hangyuan Zhang
- College of Mechanical & Energy Engineering, Beijing University of Technology, Beijing, 100124, China
| | - Yang Gao
- State Key Laboratory for Turbulence and Complex System, Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing, 100871, China
| | - Zhongliang Yu
- College of Mechanical Engineering, Yangzhou University, Yangzhou, 225127, China
| | - Chaonan Cong
- State Key Laboratory for Turbulence and Complex System, Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing, 100871, China
| | - Xiaoding Wei
- State Key Laboratory for Turbulence and Complex System, Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing, 100871, China
| | - Qingsheng Yang
- Department of Engineering Mechanics, School of Mathematics, Statistics and Mechanics, Beijing University of Technology, Beijing, 100124, China.
| |
Collapse
|
42
|
Hajarolasvadi S, Khaleghimeybodi M, Razavi P, Smirnov M, Prepeliă ST. Effect of sound-induced vibrations of the pinna on head-related transfer functions: Experimental and numerical investigations. J Acoust Soc Am 2024; 155:2875-2890. [PMID: 38682913 DOI: 10.1121/10.0025773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 04/04/2024] [Indexed: 05/01/2024]
Abstract
Numerical simulations of head-related transfer functions (HRTFs) conventionally assume a rigid boundary condition for the pinna. The human pinna, however, is an elastic deformable body that can vibrate due to incident acoustic waves. This work investigates how sound-induced vibrations of the pinna can affect simulated HRTF magnitudes. The work will motivate the research question by measuring the sound-induced vibrational patterns of an artificial pinna with a high-speed holographic interferometric system. Then, finite element simulations are used to determine HRTFs for a tabletop model of the B&K 5128 head and torso simulator for a number of directions. Two scenarios are explored: one where the pinna is modeled as perfectly rigid, and another where the pinna is modeled as linear elastic with material properties close to that of auricular cartilage. The findings suggest that pinna vibrations have negligible effects on HRTF magnitudes up to 5 kHz. The same conclusion, albeit with less certainty, is drawn for higher frequencies. Finally, the importance of the elastic domain's material properties is emphasized and possible implications for validation studies on dummy heads 1as well as the limitations of the present work are discussed in detail.
Collapse
Affiliation(s)
- Setare Hajarolasvadi
- Reality Labs Research at Meta, 8747 Willows Road, Redmond, Washington 98052, USA
| | | | - Payam Razavi
- Reality Labs Research at Meta, 8747 Willows Road, Redmond, Washington 98052, USA
| | - Michael Smirnov
- Reality Labs Research at Meta, 8747 Willows Road, Redmond, Washington 98052, USA
| | - Sebastian T Prepeliă
- Reality Labs Research at Meta, 8747 Willows Road, Redmond, Washington 98052, USA
| |
Collapse
|
43
|
Xie H, Liang M, Mo Y, Schmidt C, Wang C, Chien JH. Comparison Between Effects of Galvanic and Vibration-Based Vestibular Stimulation on Postural Control and Gait Performance in Healthy Participants: A Systematic Review of Cross-Sectional Studies. Ann Biomed Eng 2024; 52:757-793. [PMID: 38148425 DOI: 10.1007/s10439-023-03425-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 12/08/2023] [Indexed: 12/28/2023]
Abstract
Electricity and vibration were two commonly used physical agents to provide vestibular stimulation in previous studies. This study aimed to systematically review the effects of galvanic (GVS) and vibration-based vestibular stimulation (VVS) on gait performance and postural control in healthy participants. Five bioscience and engineering databases, including MEDLINE via PubMed, CINAHL via EBSCO, Cochrane Library, Scopus, and Embase, were searched until March 19th, 2023. Studies published between 2000 and 2023 in English involving GVS and VVS related to gait performance and postural control were included. The procedure was followed via the Preferred Reporting Items for Systematic reviews and Meta-Analyses guidelines. The methodological quality of included studies was assessed using the NIH study quality assessment tool for observational cohort and cross-sectional studies. A total of 55 cross-sectional studies met the inclusion criteria and were included in this study. Five studies were good-quality while 49 were moderate-quality and 1 was poor-quality. There were 50 included studies involving GVS and 5 included studies involving VVS. GVS and VVS utilized different physical agents to provide vestibular stimulation and demonstrated similar effects on vestibular perception. Supra-threshold GVS and VVS produced vestibular perturbation that impaired gait performance and postural control, while sub-threshold GVS and VVS induced stochastic resonance phenomenon that led to an improvement. Bilateral vestibular stimulation demonstrated a greater effect on gait and posture than unilateral vestibular stimulation. Compared to GVS, VVS had the characteristics of better tolerance and fewer side effects, which may substitute GVS to provide more acceptable vestibular stimulation.
Collapse
Affiliation(s)
- Haoyu Xie
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Meizhen Liang
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Yujia Mo
- Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA, USA
| | - Cindy Schmidt
- Leon S. McGoogan Health Sciences Library, University of Nebraska Medical Center, Omaha, NE, USA
| | - Chuhuai Wang
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China.
| | | |
Collapse
|
44
|
Bi X, Czajkowsky DM, Shao Z, Ye J. Digital colloid-enhanced Raman spectroscopy by single-molecule counting. Nature 2024; 628:771-775. [PMID: 38632399 DOI: 10.1038/s41586-024-07218-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 02/21/2024] [Indexed: 04/19/2024]
Abstract
Quantitative detection of various molecules at very low concentrations in complex mixtures has been the main objective in many fields of science and engineering, from the detection of cancer-causing mutagens and early disease markers to environmental pollutants and bioterror agents1-5. Moreover, technologies that can detect these analytes without external labels or modifications are extremely valuable and often preferred6. In this regard, surface-enhanced Raman spectroscopy can detect molecular species in complex mixtures on the basis only of their intrinsic and unique vibrational signatures7. However, the development of surface-enhanced Raman spectroscopy for this purpose has been challenging so far because of uncontrollable signal heterogeneity and poor reproducibility at low analyte concentrations8. Here, as a proof of concept, we show that, using digital (nano)colloid-enhanced Raman spectroscopy, reproducible quantification of a broad range of target molecules at very low concentrations can be routinely achieved with single-molecule counting, limited only by the Poisson noise of the measurement process. As metallic colloidal nanoparticles that enhance these vibrational signatures, including hydroxylamine-reduced-silver colloids, can be fabricated at large scale under routine conditions, we anticipate that digital (nano)colloid-enhanced Raman spectroscopy will become the technology of choice for the reliable and ultrasensitive detection of various analytes, including those of great importance for human health.
Collapse
Affiliation(s)
- Xinyuan Bi
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Daniel M Czajkowsky
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Zhifeng Shao
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
- National Engineering Research Center of Advanced Magnetic Resonance Technologies for Diagnosis and Therapy, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Jian Ye
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
- National Engineering Research Center of Advanced Magnetic Resonance Technologies for Diagnosis and Therapy, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
- Institute of Medical Robotics, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
- Shanghai Key Laboratory of Gynecologic Oncology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
| |
Collapse
|
45
|
Gottlow J, Sennerby L. Influence of diameter and length on primary stability in various implant site densities-An in vitro study in polyurethane blocks. Clin Implant Dent Relat Res 2024; 26:327-332. [PMID: 37926940 DOI: 10.1111/cid.13290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 10/12/2023] [Indexed: 11/07/2023]
Abstract
BACKGROUND The influence of dental implant length and diameter on primary stability in various bone densities is not well understood. AIM To in vitro study the effect of length and diameter on resonance frequency analysis (RFA), insertion torque (IT) and displacement (DP) measurements of dental implants in different implant site densities. MATERIALS AND METHODS Dental implants of four different diameters (Ø 3.5, 4.0, 4.5 and 5.0 mm) and three different lengths (7, 11 and 15 mm) (Neoss Ltd, Harrogate, UK) were placed in polyurethane blocks of three different densities (Sawbones Europe AB, Malmö, Sweden). The primary stability was assessed by RFA (ISQ) (Osstell, Osstell AB, Gothenburg, Sweden) and insertion torque measurements (ITmax in N cm) (iChiropo™, Bien-Air Dental SA, Bienne, Switzerland). In addition, the blocks were mounted in a rig and a lateral force of 25 N cm was applied to the implants and the DP was measured in μm with a micrometer gauge placed on the opposite side of the load transducer. Statistical analyses using linear and quadratic models were applied. RESULTS Implant length, diameter and block density were found to be significant independent predictors of RFA, ITmax, and DP measurements. Implant length had a strong effect, while the effect of diameter in general was subtle, particularly in the softest block. CONCLUSIONS Implant length affects primary stability more than implant diameter in polyurethane blocks of uniform density along the whole length of the tested implants.
Collapse
Affiliation(s)
- Johan Gottlow
- Department of Oral and Maxillofacial Surgery, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Lars Sennerby
- Department of Oral and Maxillofacial Surgery, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| |
Collapse
|
46
|
Uzundurukan A, Poncet S, Boffito DC, Micheau P. CT-FEM of the human thorax: Frequency response function and 3D harmonic analysis at resonance. Comput Methods Programs Biomed 2024; 246:108062. [PMID: 38359553 DOI: 10.1016/j.cmpb.2024.108062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/30/2024] [Accepted: 02/05/2024] [Indexed: 02/17/2024]
Abstract
BACKGROUND AND OBJECTIVE High-frequency chest wall compression (HFCC) therapy by airway clearance devices (ACDs) acts on the rheological properties of bronchial mucus to assist in clearing pulmonary secretions. Investigating low-frequency vibrations on the human thorax through numerical simulations is critical to ensure consistency and repeatability of studies by reducing extreme variability in body measurements across individuals. This study aims to present the numerical investigation of the harmonic acoustic excitation of ACDs on the human chest as a gentle and effective HFCC therapy. METHODS Four software programs were sequentially used to visualize medical images, decrease the number of surfaces, generate and repair meshes, and conduct numerical analysis, respectively. The developed methodology supplied the validation of the effect of HFCC through computed tomography-based finite element analysis (CT-FEM) of a human thorax. To illustrate the vibroacoustic characteristics of the HFCC therapy device, a 146-decibel sound pressure level (dBSPL) was applied on the back-chest surface of the model. Frequency response function (FRF) across 5-100 Hz was analyzed to characterize the behaviour of the human thorax with the state-space model. RESULTS We discovered that FRF pertaining to accelerance equals 0.138 m/s2N at the peak frequency of 28 Hz, which is consistent with two independent experimental airway clearance studies reported in the literature. The state-space model assessed two apparent resonance frequencies at 28 Hz and 41 Hz for the human thorax. The total displacement, kinetic energy density, and elastic strain energy density were furthermore quantified at 1 µm, 5.2 µJ/m3, and 140.7 µJ/m3, respectively, at the resonance frequency. In order to deepen our understanding of the impact on internal organs, the model underwent simulations in both the time domain and frequency domain for a comprehensive analysis. CONCLUSION Overall, the present study enabled determining and validating FRF of the human thorax to roll out the inconsistencies, contributing to the health of individuals with investigating gentle but effective HFCC therapy conditions with ACDs. This innovative finding furthermore provides greater clarity and a tangible understanding of the subject by simulating the responses of CT-FEM of the human thorax and internal organs at resonance.
Collapse
Affiliation(s)
- Arife Uzundurukan
- Centre de Recherche Acoustique-Signal-Humain, Université de Sherbrooke, 2500 Bd de l'Université, Sherbrooke, QC J1K 2R1, Canada.
| | - Sébastien Poncet
- Centre de Recherche Acoustique-Signal-Humain, Université de Sherbrooke, 2500 Bd de l'Université, Sherbrooke, QC J1K 2R1, Canada
| | - Daria Camilla Boffito
- Department of Chemical Engineering, École Polytechnique de Montréal, 2500 Chem. de Polytechnique, Montréal, QC H3T 1J4, Canada
| | - Philippe Micheau
- Centre de Recherche Acoustique-Signal-Humain, Université de Sherbrooke, 2500 Bd de l'Université, Sherbrooke, QC J1K 2R1, Canada
| |
Collapse
|
47
|
Bus-Jacobs L, Lau R, Soethoudt M, Gebbia L, Janssens E, Hermans T. Effects of Shock and Vibration on Product Quality during Last-Mile Transportation of Ebola Vaccine under Refrigerated Conditions 1. Emerg Infect Dis 2024; 30:757-760. [PMID: 38526137 PMCID: PMC10977826 DOI: 10.3201/eid3004.231060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024] Open
Abstract
Analyzing vaccine stability under different storage and transportation conditions is critical to ensure that effectiveness and safety are not affected by distribution. In a simulation of the last mile in the supply chain, we found that shock and vibration had no effect on Ad26.ZEBOV/MVA-BN-Filo Ebola vaccine regimen quality under refrigerated conditions.
Collapse
|
48
|
Gao Z, Wang Y, Yu K, Dai Z, Song T, Zhang J, Huang C, Zhang H, Yang H. Cardiac Multi-Frequency Vibration Signal Sensor Module and Feature Extraction Method Based on Vibration Modeling. Sensors (Basel) 2024; 24:2235. [PMID: 38610445 PMCID: PMC11014338 DOI: 10.3390/s24072235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 03/20/2024] [Accepted: 03/29/2024] [Indexed: 04/14/2024]
Abstract
Cardiovascular diseases pose a long-term risk to human health. This study focuses on the rich-spectrum mechanical vibrations generated during cardiac activity. By combining Fourier series theory, we propose a multi-frequency vibration model for the heart, decomposing cardiac vibration into frequency bands and establishing a systematic interpretation for detecting multi-frequency cardiac vibrations. Based on this, we develop a small multi-frequency vibration sensor module based on flexible polyvinylidene fluoride (PVDF) films, which is capable of synchronously collecting ultra-low-frequency seismocardiography (ULF-SCG), seismocardiography (SCG), and phonocardiography (PCG) signals with high sensitivity. Comparative experiments validate the sensor's performance and we further develop an algorithm framework for feature extraction based on 1D-CNN models, achieving continuous recognition of multiple vibration features. Testing shows that the recognition coefficient of determination (R2), mean absolute error (MAE), and root mean square error (RMSE) of the 8 features are 0.95, 2.18 ms, and 4.89 ms, respectively, with an average prediction speed of 60.18 us/point, meeting the re-quirements for online monitoring while ensuring accuracy in extracting multiple feature points. Finally, integrating the vibration model, sensor, and feature extraction algorithm, we propose a dynamic monitoring system for multi-frequency cardiac vibration, which can be applied to portable monitoring devices for daily dynamic cardiac monitoring, providing a new approach for the early diagnosis and prevention of cardiovascular diseases.
Collapse
Affiliation(s)
- Zhixing Gao
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China; (Z.G.); (Y.W.); (K.Y.); (Z.D.); (J.Z.); (C.H.); (H.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuqi Wang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China; (Z.G.); (Y.W.); (K.Y.); (Z.D.); (J.Z.); (C.H.); (H.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kang Yu
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China; (Z.G.); (Y.W.); (K.Y.); (Z.D.); (J.Z.); (C.H.); (H.Z.)
| | - Zhiwei Dai
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China; (Z.G.); (Y.W.); (K.Y.); (Z.D.); (J.Z.); (C.H.); (H.Z.)
| | - Tingting Song
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China; (Z.G.); (Y.W.); (K.Y.); (Z.D.); (J.Z.); (C.H.); (H.Z.)
| | - Jun Zhang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China; (Z.G.); (Y.W.); (K.Y.); (Z.D.); (J.Z.); (C.H.); (H.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chengjun Huang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China; (Z.G.); (Y.W.); (K.Y.); (Z.D.); (J.Z.); (C.H.); (H.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haiying Zhang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China; (Z.G.); (Y.W.); (K.Y.); (Z.D.); (J.Z.); (C.H.); (H.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hao Yang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China; (Z.G.); (Y.W.); (K.Y.); (Z.D.); (J.Z.); (C.H.); (H.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
49
|
Tan J, Wang M, Ni Z, Pei R, Shi F, Ye S. Intermolecular Protein-Water Coupling Impedes the Coupling Between the Amide A and Amide I Mode in Interfacial Proteins. Langmuir 2024; 40:6587-6594. [PMID: 38486393 DOI: 10.1021/acs.langmuir.4c00246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
The coupling between different vibrational modes in proteins is essential for chemical dynamics and biological functions and is linked to the propagation of conformational changes and pathways of allosteric communication. However, little is known about the influence of intermolecular protein-H2O coupling on the vibrational coupling between amide A (NH) and amide I (C═O) bands. Here, we investigate the NH/CO coupling strength in various peptides with different secondary structures at the lipid cell membrane/H2O interface using femtosecond time-resolved sum frequency generation vibrational spectroscopy (SFG-VS) in which a femtosecond infrared pump is used to excite the amide A band, and SFG-VS is used to probe transient spectral evolution in the amide A and amide I bands. Our results reveal that the NH/CO coupling strength strongly depends on the bandwidth of the amide I mode and the coupling of proteins with water molecules. A large extent of protein-water coupling significantly reduces the delocalization of the amide I mode along the peptide chain and impedes the NH/CO coupling strength. A large NH/CO coupling strength is found to show a strong correlation with the high energy transfer rate found in the light-harvesting proteins of green sulfur bacteria, which may understand the mechanism of energy transfer through a molecular system and assist in controlling vibrational energy transfer by engineering the molecular structures to achieve high energy transfer efficiency.
Collapse
Affiliation(s)
- Junjun Tan
- Hefei National Research Center for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei, Anhui 230088, China
| | - Mengmeng Wang
- Hefei National Research Center for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Zijian Ni
- Hefei National Research Center for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ruoqi Pei
- Hefei National Research Center for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Fangwen Shi
- Hefei National Research Center for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Shuji Ye
- Hefei National Research Center for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei, Anhui 230088, China
| |
Collapse
|
50
|
Zhang B, Dong M, He B, Fang H, Ruan H, Zhang M, Liang X, Zhang F, Sun D. A high-intensity low-frequency acoustic generator based on the Helmholtz resonator and airflow modulator. PLoS One 2024; 19:e0300832. [PMID: 38517876 PMCID: PMC10959342 DOI: 10.1371/journal.pone.0300832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 03/04/2024] [Indexed: 03/24/2024] Open
Abstract
The high-intensity low-frequency acoustic sources have essential applications in acoustic biological effects research, airport bird repelling, and boiler ash removal. However, generating high-intensity low-frequency acoustic waves in open space is difficult. In this paper, a low-frequency acoustic generator with a resonant cavity used to enhance the acoustic intensity in open space was developed, which is an aerodynamic acoustic generator to radiates a high-intensity acoustic wave of 52Hz. Some experiments were carried out to measure this generator's internal flow field and radiated acoustic field characteristics, including the propagation characteristics at 100m. The experimental results show that the resonant enhancement effect is presented near the predetermined resonance frequency, and the enhanced value is about 4dB. The acoustic intensity for 52Hz at 1m position is 124dB. By combining the Helmholtz resonator with the airflow modulator, the airflow resonance in the resonator enhances the air pressure pulsation inside the chamber and increases the disturbance of acoustic radiation to the air. So as to improve the sound intensity and radiation efficiency in the low-frequency range.
Collapse
Affiliation(s)
- Baoguo Zhang
- Northwest Institute of Nuclear Technology, Xi’an, China
| | - Mingrong Dong
- Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, China
| | - Bin He
- Northwest Institute of Nuclear Technology, Xi’an, China
| | - Houlin Fang
- Northwest Institute of Nuclear Technology, Xi’an, China
| | - Haozhong Ruan
- Northwest Institute of Nuclear Technology, Xi’an, China
| | - Min Zhang
- Northwest Institute of Nuclear Technology, Xi’an, China
| | - Xubin Liang
- Northwest Institute of Nuclear Technology, Xi’an, China
| | - Fang Zhang
- Northwest Institute of Nuclear Technology, Xi’an, China
| | - Deyu Sun
- Northwest Institute of Nuclear Technology, Xi’an, China
| |
Collapse
|