101
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Kang Z, Huang Z, Peng Q, Shi Z, Xiao H, Yin R, Fu G, Zhao J. Recycling technologies, policies, prospects, and challenges for spent batteries. iScience 2023; 26:108072. [PMID: 37867952 PMCID: PMC10589888 DOI: 10.1016/j.isci.2023.108072] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2023] Open
Abstract
The recycling of spent batteries is an important concern in resource conservation and environmental protection, while it is facing challenges such as insufficient recycling channels, high costs, and technical difficulties. To address these issues, a review of the recycling of spent batteries, emphasizing the importance and potential value of recycling is conducted. Besides, the recycling policies and strategies implemented in representative countries are summarized, providing legal and policy support for the recycling industry. Moreover, a comprehensive classification and comparison of recycling technologies identify the characteristics and current status of different approaches. The integrated recycling technology provides a better recycling performance with zero-pollution recycling of spent battery. Biorecycling technology is expected to gain a broad development prospect in the future owing to the superiority of energy-saving and environmental protection, high recycling efficiency, via microbial degradation, enzymatic degradation, etc. Consequently, as for the existing recycling challenges of waste batteries, developing new recycling technology and perfecting its recycling system is an indispensable guarantee for the sustainable development of waste battery. Meanwhile, theoretical support is offered for the recycling of spent batteries.
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Affiliation(s)
- Zhuang Kang
- School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
| | - Zhixin Huang
- Key Laboratory of Advanced Manufacturing Technology of the Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Qingguo Peng
- School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
- Key Laboratory of Advanced Manufacturing Technology of the Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Zhiwei Shi
- Key Laboratory of Advanced Manufacturing Technology of the Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Huaqiang Xiao
- School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
| | - Ruixue Yin
- School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
| | - Guang Fu
- School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
| | - Jin Zhao
- School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
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102
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Wei L, Pan Z, Shi X, Esan OC, Li G, Qi H, Wu Q, An L. Solar-driven thermochemical conversion of H 2O and CO 2 into sustainable fuels. iScience 2023; 26:108127. [PMID: 37876816 PMCID: PMC10590985 DOI: 10.1016/j.isci.2023.108127] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023] Open
Abstract
Solar-driven thermochemical conversion of H2O and CO2 into sustainable fuels, based on redox cycle, provides a promising path for alternative energy, as it employs the solar energy as high-temperature heat supply and adopts H2O and CO2 as initial feedstock. This review describes the sustainable fuels production system, including a series of physical and chemical processes for converting solar energy into chemical energy in the form of sustainable fuels. Detailed working principles, redox materials, and key devices are reviewed and discussed to provide systematic and in-depth understanding of thermochemical fuels production with the aid of concentrated solar power technology. In addition, limiting factors affecting the solar-to-fuel efficiency are analyzed; meanwhile, the improvement technologies (heat recovery concepts and designs) are summarized. This study therefore sets a pathway for future research works based on the current status and demand for further development of such technologies on a commercial scale.
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Affiliation(s)
- Linyang Wei
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
- School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Zhefei Pan
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Xingyi Shi
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Oladapo Christopher Esan
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Guojun Li
- School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Hong Qi
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Qixing Wu
- Shenzhen Key Laboratory of New Lithium-ion Batteries and Mesoporous Materials, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Liang An
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
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103
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Suo C, Li W, Luo S, Ma C, Liu S. Multisite photocatalytic depolymerization of lignin model compound utilizing full-spectrum light over magnetic microspheres. iScience 2023; 26:108167. [PMID: 37920663 PMCID: PMC10618704 DOI: 10.1016/j.isci.2023.108167] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/20/2023] [Accepted: 10/05/2023] [Indexed: 11/04/2023] Open
Abstract
Photocatalytic depolymerization is a high value-added approach for utilization of lignin. In this study, magnetic microspheres of FeCoRu@SiO2-TiO2 were synthesized by a co-precipitation method. Doping with CoOx and RuOx was used to improve the response to visible light, and doping with TiO2 was used to improve the response to ultraviolet light (λ < 380 nm). The lignin model compound depolymerization rate was >90%. The electron paramagnetic resonance results showed that the reaction occurred in two steps (aerobic phase and oxygen-free phase). Most of the O2- was produced in the first step by cleavage of C-O bonds. The second step was inhibited in an oxygen-free atmosphere. This research provides a valid method for enhancing the photocatalytic properties using full-spectrum light and exploring the lignin photocatalytic depolymerization mechanism. Further research is required to develop the catalyst properties and performance to produce radicals.
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Affiliation(s)
- Chengcheng Suo
- Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Wei Li
- Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Sha Luo
- Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Chunhui Ma
- Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Shouxin Liu
- Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
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104
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Chen X, Ye C, Wang Y, Wu Z, Zhu T, Zhang F, Ding X, Shi Z, Zheng Z, Li W. Quantifying evolution of soot mixing state from transboundary transport of biomass burning emissions. iScience 2023; 26:108125. [PMID: 37876807 PMCID: PMC10590856 DOI: 10.1016/j.isci.2023.108125] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/14/2023] [Accepted: 09/28/2023] [Indexed: 10/26/2023] Open
Abstract
Incomplete combustion of fossil fuels and biomass burning emit large amounts of soot particles into the troposphere. The condensation process is considered to influence the size (Dp) and mixing state of soot particles, which affects their solar absorption efficiency and lifetimes. However, quantifying aging evolution of soot remains hampered in the real world because of complicated sources and observation technologies. In the Himalayas, we isolated soot sourced from transboundary transport of biomass burning and revealed soot aging mechanisms through microscopic observations. Most of coated soot particles stabilized one soot core under Dp < 400 nm, but 34.8% of them contained multi-soot cores (nsoot ≥ 2) and nsoot increased 3-9 times with increasing Dp. We established the soot mixing models to quantify transformation from condensation- to coagulation-dominant regime at Dp ≈ 400 nm. Studies provide essential references for adopting mixing rules and quantifying the optical absorption of soot in atmospheric models.
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Affiliation(s)
- Xiyao Chen
- Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
| | - Chunxiang Ye
- College Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Yuanyuan Wang
- Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
| | - Zhijun Wu
- College Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Tong Zhu
- College Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Fan Zhang
- Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
| | - Xiaokun Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Zongbo Shi
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Zhonghua Zheng
- Department of Earth and Environmental Sciences, The University of Manchester, Manchester M13 9PL, UK
| | - Weijun Li
- Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
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105
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Fox D. The 3D printer that crafts complex robotic organs in a single run. Nature 2023:10.1038/d41586-023-03568-4. [PMID: 37968466 DOI: 10.1038/d41586-023-03568-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
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106
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Baker N. The robot chemist helping to pave the way to settlements on Mars. Nature 2023:10.1038/d41586-023-03566-6. [PMID: 37964119 DOI: 10.1038/d41586-023-03566-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
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107
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Chen X, Zhang C, Liu X, Dong Y, Meng H, Qin X, Jiang Z, Wei X. Low-noise fluorescent detection of cardiac troponin I in human serum based on surface acoustic wave separation. Microsyst Nanoeng 2023; 9:141. [PMID: 37954038 PMCID: PMC10632424 DOI: 10.1038/s41378-023-00600-5] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 08/11/2023] [Accepted: 08/20/2023] [Indexed: 11/14/2023]
Abstract
Acute myocardial infarction (AMI) is a life-threatening disease when sudden blockage of coronary artery occurs. As the most specific biomarker, cardiac troponin I (cTnI) is usually checked separately to diagnose or eliminate AMI, and achieving the accurate detection of cTnI is of great significance to patients' life and health. Compared with other methods, fluorescent detection has the advantages of simple operation, high sensitivity and wide applicability. However, due to the strong fluorescence interference of biological molecules in body fluids, it is often difficult to obtain high sensitivity. In order to solve this problem, in this study, surface acoustic wave separation is designed to purify the target to achieve more sensitive detection performance of fluorescent detection. Specifically, the interference of background noise is almost completely removed on a microfluidic chip by isolating microbeads through acoustic radiation force, on which the biomarkers are captured by the immobilized detection probe. And then, the concentration of cTnI in human serum is detected by the fluorescence intensity change of the isolated functionalized beads. By this way, the detection limit of our biosensor calculated by 3σ/K method is 44 pg/mL and 0.34 ng/mL in PBS buffer and human serum respectively. Finally, the reliability of this method has been validated by comparison with clinical tests from the nephelometric analyzer in hospital.
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Affiliation(s)
- Xuan Chen
- State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, 710049 China
| | - Chuanyu Zhang
- State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, 710049 China
| | - Xianglian Liu
- State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, 710049 China
| | - Yangchao Dong
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi’an, 710032 China
| | - Hao Meng
- The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, 710004 China
| | - Xianming Qin
- School of Mechano-Electronic Engineering, Xidian University, Xi’an, 710071 China
| | - Zhuangde Jiang
- State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, 710049 China
| | - Xueyong Wei
- State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, 710049 China
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108
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Poskus MD, Wang T, Deng Y, Borcherding S, Atkinson J, Zervantonakis IK. Fabrication of 3D-printed molds for polydimethylsiloxane-based microfluidic devices using a liquid crystal display-based vat photopolymerization process: printing quality, drug response and 3D invasion cell culture assays. Microsyst Nanoeng 2023; 9:140. [PMID: 37954040 PMCID: PMC10632127 DOI: 10.1038/s41378-023-00607-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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 08/10/2023] [Accepted: 09/11/2023] [Indexed: 11/14/2023]
Abstract
Microfluidic platforms enable more precise control of biological stimuli and environment dimensionality than conventional macroscale cell-based assays; however, long fabrication times and high-cost specialized equipment limit the widespread adoption of microfluidic technologies. Recent improvements in vat photopolymerization three-dimensional (3D) printing technologies such as liquid crystal display (LCD) printing offer rapid prototyping and a cost-effective solution to microfluidic fabrication. Limited information is available about how 3D printing parameters and resin cytocompatibility impact the performance of 3D-printed molds for the fabrication of polydimethylsiloxane (PDMS)-based microfluidic platforms for cellular studies. Using a low-cost, commercially available LCD-based 3D printer, we assessed the cytocompatibility of several resins, optimized fabrication parameters, and characterized the minimum feature size. We evaluated the response to both cytotoxic chemotherapy and targeted kinase therapies in microfluidic devices fabricated using our 3D-printed molds and demonstrated the establishment of flow-based concentration gradients. Furthermore, we monitored real-time cancer cell and fibroblast migration in a 3D matrix environment that was dependent on environmental signals. These results demonstrate how vat photopolymerization LCD-based fabrication can accelerate the prototyping of microfluidic platforms with increased accessibility and resolution for PDMS-based cell culture assays.
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Affiliation(s)
- Matthew D. Poskus
- Department of Bioengineering, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA USA
| | - Tuo Wang
- Department of Bioengineering, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA USA
| | - Yuxuan Deng
- Department of Bioengineering, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA USA
| | - Sydney Borcherding
- Department of Bioengineering, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA USA
| | - Jake Atkinson
- Department of Bioengineering, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA USA
| | - Ioannis K. Zervantonakis
- Department of Bioengineering, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA USA
- McGowan Institute of Regenerative Medicine, Pittsburgh, PA USA
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109
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Massardi S, Briem K, Veneman JF, Torricelli D, Moreno JC. Re-defining wearable robots: a multidisciplinary approach towards a unified terminology. J Neuroeng Rehabil 2023; 20:149. [PMID: 37936173 PMCID: PMC10631060 DOI: 10.1186/s12984-023-01269-7] [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: 11/03/2022] [Accepted: 10/17/2023] [Indexed: 11/09/2023] Open
Abstract
Effective communication is especially important in the wearable robots (WRs) community, which encloses a great variety of devices across different application domains, e.g., healthcare, occupational, and consumer. In this paper we present a vocabulary of terms with the aim to create a common understanding of terms and concepts among the different fields of expertise relevant in the WRs community. Our goal is to develop shared documentation that could serve as a reference to facilitate the use of accepted definitions in the field. The presented vocabulary is the result of different focus group discussions among experts in the field. The resulting document was then validated by presenting it to the WR community through an online survey. The results of the survey highlight a strong agreement in terms of acceptance of the vocabulary, its usefulness, and applicability of the proposed definitions as well as an overall appreciation for its purpose and target. This work represents a pilot study providing unique material for the WR community, encouraging the use of shared agreed definitions. The reported version of the vocabulary has been made available as a live document in a github repository, for public commenting and further improvements.
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Affiliation(s)
- Stefano Massardi
- Cajal Institute, Spanish National Research Council (CSIC), Madrid, Spain
- Department of Mechanical and Industrial Engineering (DIMI), University of Brescia, Brescia, Italy
| | - Kristín Briem
- Centre of Movement Science, Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | | | - Diego Torricelli
- Cajal Institute, Spanish National Research Council (CSIC), Madrid, Spain.
| | - Juan C Moreno
- Cajal Institute, Spanish National Research Council (CSIC), Madrid, Spain
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110
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Miao T, Li Q, Chen L, Li J, Hu X, Wu X, Wu W, Xiao D. Removal of the rate table: MEMS gyrocompass with virtual maytagging. Microsyst Nanoeng 2023; 9:138. [PMID: 37941763 PMCID: PMC10628254 DOI: 10.1038/s41378-023-00610-3] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 09/04/2023] [Accepted: 09/26/2023] [Indexed: 11/10/2023]
Abstract
High-performance micro-electro-mechanical system (MEMS) gyrocompasses for north-finding systems have been very popular for decades. In this paper, a MEMS north-finding system (NFS) based on virtual maytagging (VM) is presented for the first time. In stark contrast to previous schemes of MEMS-based NFSs (e.g., carouseling, maytagging) and the abandoning rate table, we developed a honeycomb disk resonator gyroscope (HDRG) and two commercial accelerometers for azimuth detection. Instead of the physical rotation of the integrated turntable in traditional NFSs, the vibratory working modes of the HDRG are rotated periodically with electronic control to reduce the uncertainty in the azimuth. After systematically analyzing the principle of NFSs with VM, we designed tests to verify the practicability at the sensor level. A bias instability of 0.0078°/h can be obtained during one day with VM in an HDRG. We also implemented comparative north-finding experiments to further check our strategy at the system level. The accuracy in the azimuth can reach 0.204° for 5 min at 28.2° latitude with VM and 0.172° with maytagging. The results show that without any mechanical turning parts, VM technology makes it possible to develop high-precision handheld MEMS NFSs.
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Affiliation(s)
- Tongqiao Miao
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha, 410073 China
| | - Qingsong Li
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha, 410073 China
| | - Liangqian Chen
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha, 410073 China
| | - Junjian Li
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha, 410073 China
| | - Xiaoping Hu
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha, 410073 China
| | - Xuezhong Wu
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha, 410073 China
| | - Wenqi Wu
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha, 410073 China
| | - Dingbang Xiao
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha, 410073 China
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111
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Leonardo's construction design takes shape centuries later. Nature 2023; 623:669. [PMID: 37978281 DOI: 10.1038/d41586-023-03528-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
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112
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Aminian-Dehkordi J, Rahimi S, Golzar-Ahmadi M, Singh A, Lopez J, Ledesma-Amaro R, Mijakovic I. Synthetic biology tools for environmental protection. Biotechnol Adv 2023; 68:108239. [PMID: 37619824 DOI: 10.1016/j.biotechadv.2023.108239] [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: 04/15/2023] [Revised: 08/17/2023] [Accepted: 08/20/2023] [Indexed: 08/26/2023]
Abstract
Synthetic biology transforms the way we perceive biological systems. Emerging technologies in this field affect many disciplines of science and engineering. Traditionally, synthetic biology approaches were commonly aimed at developing cost-effective microbial cell factories to produce chemicals from renewable sources. Based on this, the immediate beneficial impact of synthetic biology on the environment came from reducing our oil dependency. However, synthetic biology is starting to play a more direct role in environmental protection. Toxic chemicals released by industries and agriculture endanger the environment, disrupting ecosystem balance and biodiversity loss. This review highlights synthetic biology approaches that can help environmental protection by providing remediation systems capable of sensing and responding to specific pollutants. Remediation strategies based on genetically engineered microbes and plants are discussed. Further, an overview of computational approaches that facilitate the design and application of synthetic biology tools in environmental protection is presented.
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Affiliation(s)
| | - Shadi Rahimi
- Department of Life Sciences, Chalmers University of Technology, Göteborg, Sweden
| | - Mehdi Golzar-Ahmadi
- Norman B. Keevil Institute of Mining Engineering, University of British Columbia, Vancouver, Canada
| | - Amritpal Singh
- Department of Bioengineering, Imperial College London, London, SW72AZ, UK
| | - Javiera Lopez
- Department of Bioengineering, Imperial College London, London, SW72AZ, UK
| | | | - Ivan Mijakovic
- Department of Life Sciences, Chalmers University of Technology, Göteborg, Sweden; Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Lyngby, Denmark.
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113
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Siming L, Abraha A. Natural science and engineering instructors' knowledge and practice of brain-based instruction in Ethiopian higher education institutions. Heliyon 2023; 9:e22325. [PMID: 38045117 PMCID: PMC10689939 DOI: 10.1016/j.heliyon.2023.e22325] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 11/09/2023] [Accepted: 11/09/2023] [Indexed: 12/05/2023] Open
Abstract
Currently, the Brain-Based Instructional approach has become an alternative instructional method in the schooling system of different countries of the world. This study explored the current situation of natural science and engineering instructors' knowledge and practices of brain-based instruction in Ethiopian higher education institutions. A descriptive survey research design with concurrent mixed methods was employed. Data collection tools were developed based on the twelve principles of brain-based learning theory and confirmed their validity and reliability. Survey questions were used to gather quantitative data from 512 randomly selected instructors. Qualitative data were collected through interviews with 14 purposely selected instructors. Classroom observation was also conducted to triangulate data obtained through interviews and survey questions. Quantitative data were analyzed using descriptive statistics, whereas qualitative data were analyzed thematically. The findings of this study depict that most natural science and engineering instructors have good knowledge of brain-based instruction but not transferable knowledge and skills. There is a clear gap between instructors' knowledge and classroom practice of brain-based instruction. Thus, to improve instructional practices, higher education institutions need to work strongly to narrow the existing variation. Implications and further recommendations are also suggested.
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Affiliation(s)
- Luo Siming
- School of Education, Huazhong University of Science and Technology (HUST), Wuhan 430074, Hubei, China
| | - Ataklti Abraha
- School of Education, Huazhong University of Science and Technology (HUST), Wuhan 430074, Hubei, China
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114
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Kong YL. Multi-material 3D printing guided by machine vision. Nature 2023; 623:488-490. [PMID: 37968521 DOI: 10.1038/d41586-023-03420-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
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115
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Radisic M. Hydrogel implant rehabilitates muscles through electrical stimulation. Nature 2023; 623:37-38. [PMID: 37914943 DOI: 10.1038/d41586-023-03211-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
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116
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Chen S. The future is quantum: universities look to train engineers for an emerging industry. Nature 2023; 623:653-655. [PMID: 37957385 DOI: 10.1038/d41586-023-03511-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
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117
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A robot performs heart surgery with a strong but delicate touch. Nature 2023; 623:227. [PMID: 37919415 DOI: 10.1038/d41586-023-03353-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
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118
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Yu H, Zhao Z, Heidari AA, Ma L, Hamdi M, Mansour RF, Chen H. An accelerated sine mapping whale optimizer for feature selection. iScience 2023; 26:107896. [PMID: 37860760 PMCID: PMC10582515 DOI: 10.1016/j.isci.2023.107896] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 07/10/2023] [Accepted: 09/07/2023] [Indexed: 10/21/2023] Open
Abstract
An improved whale optimization algorithm (SWEWOA) is presented for global optimization issues. Firstly, the sine mapping initialization strategy (SS) is used to generate the population. Secondly, the escape energy (EE) is introduced to balance the exploration and exploitation of WOA. Finally, the wormhole search (WS) strengthens the capacity for exploitation. The hybrid design effectively reinforces the optimization capability of SWEWOA. To prove the effectiveness of the design, SWEWOA is performed in two test sets, CEC 2017 and 2022, respectively. The advantage of SWEWOA is demonstrated in 26 superior comparison algorithms. Then a new feature selection method called BSWEWOA-KELM is developed based on the binary SWEWOA and kernel extreme learning machine (KELM). To verify its performance, 8 high-performance algorithms are selected and experimentally studied in 16 public datasets of different difficulty. The test results demonstrate that SWEWOA performs excellently in selecting the most valuable features for classification problems.
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Affiliation(s)
- Helong Yu
- College of Information Technology, Jilin Agricultural University, Changchun 130118, China
| | - Zisong Zhao
- College of Information Technology, Jilin Agricultural University, Changchun 130118, China
| | - Ali Asghar Heidari
- Key Laboratory of Intelligent Informatics for Safety & Emergency of Zhejiang Province, Wenzhou University, Wenzhou 325035, China
| | - Li Ma
- College of Information Technology, Jilin Agricultural University, Changchun 130118, China
| | - Monia Hamdi
- Department of Information Technology, College of Computer and Information Sciences, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Romany F. Mansour
- Department of Mathematics, Faculty of Science, New Valley University, El-Kharga 72511, Egypt
| | - Huiling Chen
- Key Laboratory of Intelligent Informatics for Safety & Emergency of Zhejiang Province, Wenzhou University, Wenzhou 325035, China
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119
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Kumar S, Anastassov S, Aoki SK, Falkenstein J, Chang CH, Frei T, Buchmann P, Argast P, Khammash M. Diya - A universal light illumination platform for multiwell plate cultures. iScience 2023; 26:107862. [PMID: 37810238 PMCID: PMC10551653 DOI: 10.1016/j.isci.2023.107862] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 07/25/2023] [Accepted: 09/06/2023] [Indexed: 10/10/2023] Open
Abstract
Recent progress in protein engineering has established optogenetics as one of the leading external non-invasive stimulation strategies, with many optogenetic tools being designed for in vivo operation. Characterization and optimization of these tools require a high-throughput and versatile light delivery system targeting micro-titer culture volumes. Here, we present a universal light illumination platform - Diya, compatible with a wide range of cell culture plates and dishes. Diya hosts specially designed features ensuring active thermal management, homogeneous illumination, and minimal light bleedthrough. It offers light induction programming via a user-friendly custom-designed GUI. Through extensive characterization experiments with multiple optogenetic tools in diverse model organisms (bacteria, yeast, and human cell lines), we show that Diya maintains viable conditions for cell cultures undergoing light induction. Finally, we demonstrate an optogenetic strategy for in vivo biomolecular controller operation. With a custom-designed antithetic integral feedback circuit, we exhibit robust perfect adaptation and light-controlled set-point variation using Diya.
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Affiliation(s)
- Sant Kumar
- Department of Biosystems Science and Engineering (D-BSSE), ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Stanislav Anastassov
- Department of Biosystems Science and Engineering (D-BSSE), ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Stephanie K. Aoki
- Department of Biosystems Science and Engineering (D-BSSE), ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Johannes Falkenstein
- Department of Biosystems Science and Engineering (D-BSSE), ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Ching-Hsiang Chang
- Department of Biosystems Science and Engineering (D-BSSE), ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Timothy Frei
- Department of Biosystems Science and Engineering (D-BSSE), ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Peter Buchmann
- Department of Biosystems Science and Engineering (D-BSSE), ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Paul Argast
- Department of Biosystems Science and Engineering (D-BSSE), ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Mustafa Khammash
- Department of Biosystems Science and Engineering (D-BSSE), ETH Zürich, Mattenstrasse 26, 4058 Basel, Switzerland
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120
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Li X, Lin Z, Lv H, Yu L, Heidari AA, Zhang Y, Chen H, Liang G. Advanced slime mould algorithm incorporating differential evolution and Powell mechanism for engineering design. iScience 2023; 26:107736. [PMID: 37810256 PMCID: PMC10558746 DOI: 10.1016/j.isci.2023.107736] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/21/2023] [Accepted: 08/23/2023] [Indexed: 10/10/2023] Open
Abstract
The slime mould algorithm (SMA) is a population-based swarm intelligence optimization algorithm that simulates the oscillatory foraging behavior of slime moulds. To overcome its drawbacks of slow convergence speed and premature convergence, this paper proposes an improved algorithm named PSMADE, which integrates the differential evolution algorithm (DE) and the Powell mechanism. PSMADE utilizes crossover and mutation operations of DE to enhance individual diversity and improve global search capability. Additionally, it incorporates the Powell mechanism with a taboo table to strengthen local search and facilitate convergence toward better solutions. The performance of PSMADE is evaluated by comparing it with 14 metaheuristic algorithms (MA) and 15 improved MAs on the CEC 2014 benchmarks, as well as solving four constrained real-world engineering problems. Experimental results demonstrate that PSMADE effectively compensates for the limitations of SMA and exhibits outstanding performance in solving various complex problems, showing potential as an effective problem-solving tool.
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Affiliation(s)
- Xinru Li
- Key Laboratory of Intelligent Informatics for Safety & Emergency of Zhejiang Province, Wenzhou University, Wenzhou 325035, China
| | - Zihan Lin
- Key Laboratory of Intelligent Informatics for Safety & Emergency of Zhejiang Province, Wenzhou University, Wenzhou 325035, China
| | - Haoxuan Lv
- Key Laboratory of Intelligent Informatics for Safety & Emergency of Zhejiang Province, Wenzhou University, Wenzhou 325035, China
| | - Liang Yu
- Key Laboratory of Intelligent Informatics for Safety & Emergency of Zhejiang Province, Wenzhou University, Wenzhou 325035, China
| | - Ali Asghar Heidari
- School of Surveying and Geospatial Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Yudong Zhang
- School of Computing and Mathematical Sciences, University of Leicester, Leicester LE1 7RH, UK
| | - Huiling Chen
- Key Laboratory of Intelligent Informatics for Safety & Emergency of Zhejiang Province, Wenzhou University, Wenzhou 325035, China
| | - Guoxi Liang
- Department of Information Technology, Wenzhou Polytechnic, Wenzhou 325035, China
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121
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Johnson J, Manikandan S. Resource potential mapping of bifacial photovoltaic systems in India. iScience 2023; 26:108017. [PMID: 37829198 PMCID: PMC10565778 DOI: 10.1016/j.isci.2023.108017] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 08/29/2023] [Accepted: 09/18/2023] [Indexed: 10/14/2023] Open
Abstract
Bifacial photovoltaic is one of the technologies that can spearhead Indian ambitions to achieve the 7th United Nations Sustainable Development Goals and Nationally Determined Contributions of COP 26. But, like all emerging technology, the lack of awareness and unavailability of extensive data, like technology potential maps that could aid people in identifying the advantages of newer technologies, has led to sluggish growth in the Indian market. To expedite the growth of bifacial PV in the Indian market, optimized resource potential maps of bifacial PV were developed from an experimentally validated view factor-based bifacial PV model. The annual average bifacial gain was found to vary between 2.5% and 22% at various locations in India. The effect of ground albedo and height of installation was also studied. Furthermore, the annual and seasonal power out of bifacial PV was higher than monofacial PV at any location in India.
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Affiliation(s)
- Joji Johnson
- Department of Mechanical Engineering, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India
| | - S. Manikandan
- Department of Mechanical Engineering, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India
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122
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Hara T. Mechanism that determines the economics of 100% renewable power systems. iScience 2023; 26:107872. [PMID: 37752944 PMCID: PMC10518472 DOI: 10.1016/j.isci.2023.107872] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 07/26/2023] [Accepted: 09/06/2023] [Indexed: 09/28/2023] Open
Abstract
Many studies have evaluated the economic feasibility of 100% renewable power systems using the optimization approach, but the mechanisms determining the results remain unclear, making this issue still debatable. This study presents a mathematical formulation of the mechanism that only the demand and power generation profiles determine the optimal capacities of generation and storage and their trade-off relationship. Furthermore, this study demonstrates the comprehensive quantification of the corresponding relationships among the factor cost of technologies, their optimal capacities, and total system cost. Based on these findings, the study also shows that hybrid systems comprising multiple renewable energy sources and different types of storage, including long-duration energy storage, are critical to reducing the total system cost by using actual profile data for multiple years and regions in Japan. This suggests that large-scale deployment of current-level power-to-gas technologies, such as water electrolysis, can contribute to the economics of 100% renewable power systems.
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Affiliation(s)
- Takuya Hara
- Toyota Central R&D Labs., Inc, Yokomichi 41-1, Nagakute, Aichi 480-1192, Japan
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123
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Li G, Wu W, Zhen K, Zhang S, Chen Z, Lv Y, Hou X, Yu L. Effects of different drop height training on lower limb explosive and change of direction performance in collegiate Sanda athletes. iScience 2023; 26:107972. [PMID: 37829202 PMCID: PMC10565765 DOI: 10.1016/j.isci.2023.107972] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/11/2023] [Accepted: 09/16/2023] [Indexed: 10/14/2023] Open
Abstract
The purpose of the present study was to examine the effects of 6 weeks of 40-, 60-, or 80-cm drop jump (DJ) training on lower limb explosive and change of direction (CoD) performance in collegiate Sanda athletes. Repeated-measure ANOVA revealed that there was a significant group × time interaction for standing long jump test (p = 0.006), counter movement jump test (p = 0.026), Illinois agility test (p = 0.003), square test (p = 0.018), Nebraska test (p = 0.027), t test (p = 0.032), and hexagon test (p = 0.012) due to the best performance observed at post-test compared with pre-test for DJ60 (effect size = 0.89-2.89), and the improvement was higher than that of the other groups. These findings suggest that 6 weeks of DJ training could improve the lower limb explosive and CoD performance in collegiate Sanda athletes and that 60 cm may be the optimal drop height.
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Affiliation(s)
- Gen Li
- Key Laboratory of Physical Fitness and Exercise, Ministry of Education, Beijing Sport University, Beijing, China
- School of Physical Education & Sports Science, South China Normal University, Guangzhou, China
| | - Weiliang Wu
- Department of Sports Performance, Beijing Sport University, Beijing, China
| | - Kai Zhen
- Department of Sports Performance, Beijing Sport University, Beijing, China
| | - Shiyan Zhang
- Department of Sports Performance, Beijing Sport University, Beijing, China
| | - Zhizhou Chen
- Department of Sports Performance, Beijing Sport University, Beijing, China
| | - Yuanyuan Lv
- Key Laboratory of Physical Fitness and Exercise, Ministry of Education, Beijing Sport University, Beijing, China
- Institute of Sport and Health Science, Beijing Sport University, Beijing, China
| | - Xiao Hou
- Key Laboratory of Physical Fitness and Exercise, Ministry of Education, Beijing Sport University, Beijing, China
- School of Sport Sciences, Beijing Sport University, Beijing, China
| | - Laikang Yu
- Key Laboratory of Physical Fitness and Exercise, Ministry of Education, Beijing Sport University, Beijing, China
- Department of Sports Performance, Beijing Sport University, Beijing, China
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124
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Xing Q, Hong R, Shen Y, Shen Y. Design and validation of depth camera-based static posture assessment system. iScience 2023; 26:107974. [PMID: 37810248 PMCID: PMC10551660 DOI: 10.1016/j.isci.2023.107974] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 07/20/2023] [Accepted: 09/16/2023] [Indexed: 10/10/2023] Open
Abstract
Postural abnormalities have become a prevalent issue affecting individuals of all ages, resulting in a diminished quality of life. Easy-use and reliable posture assessment tools can aid in screening for and correcting posture deviation at an early stage. In this study, we present a depth camera-based static posture assessment system to screen for common postural anomalies such as uneven shoulders, pelvic tilt, bowlegs and knock-knees, forward head, scoliosis, and shoulder blade inclination. The system consists of an Azure Kinect camera, a laptop, and evaluation software. Our system accurately measures skeleton and posture indexes and shows favorable agreement with a golden standard optical infrared motion capture system. The findings indicate that the system is a low-cost posture assessment tool with high precision and accuracy, suitable for initial screening of postural abnormalities in individuals of all ages.
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Affiliation(s)
- Qingjun Xing
- School of Sport Science, Beijing Sport University, Beijing 100084, China
| | - Ruiwei Hong
- School of Sport Engineering, Beijing Sport University, Beijing 100084, China
| | - Yuanyuan Shen
- School of Sport Engineering, Beijing Sport University, Beijing 100084, China
| | - Yanfei Shen
- School of Sport Engineering, Beijing Sport University, Beijing 100084, China
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125
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Du Y, Liu Y, Wang A, Kong J. Research progress and future perspectives on electromagnetic wave absorption of fibrous materials. iScience 2023; 26:107873. [PMID: 37817934 PMCID: PMC10561061 DOI: 10.1016/j.isci.2023.107873] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2023] Open
Abstract
Electromagnetic waves have caused great harm to military safety, high-frequency electronic components, and precision instruments, and so forth, which urgently requires the development of lightweight, high-efficiency, broadband electromagnetic waves (EMW) absorbing materials for protection. As the basic fibrous materials, carbon fibers (CFs) and SiC fibers (SiCf) have been widely applied in EMW absorption due to their intrinsic characteristics of low density, high mechanical properties, high conductivity, and dielectric loss mechanism. Nevertheless, it has remained a great challenge to develop lightweight EMW-absorbing fibrous materials with strong absorption capability and broad frequency range. In this review, the fundamental electromagnetic attenuation mechanisms are firstly introduced. Furthermore, the preparation, structure, morphology, and absorbing performance of CFs and SiCf-based EMW absorbing composites are summarized. In addition, prospective research opportunities are highlighted toward the development of fibrous absorbing materials with the excellent absorption performance.
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Affiliation(s)
- Yuzhang Du
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710072, China
| | - Yichen Liu
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710072, China
| | - Aoao Wang
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710072, China
| | - Jie Kong
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710072, China
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126
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Ko J, Lee BJ, Lee J. Advanced operation of heated fluidic resonators via mechanical and thermal loss reduction in vacuum. Microsyst Nanoeng 2023; 9:127. [PMID: 37829159 PMCID: PMC10564801 DOI: 10.1038/s41378-023-00575-3] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 06/06/2023] [Accepted: 07/04/2023] [Indexed: 10/14/2023]
Abstract
For simultaneous and quantitative thermophysical measurements of ultrasmall liquid volumes, we have recently developed and reported heated fluidic resonators (HFRs). In this paper, we improve the precision of HFRs in a vacuum by significantly reducing the thermal loss around the sensing element. A vacuum chamber with optical, electrical, and microfluidic access is custom-built to decrease the convection loss by two orders of magnitude under 10-4 mbar conditions. As a result, the measurement sensitivities for thermal conductivity and specific heat capacity are increased by 4.1 and 1.6 times, respectively. When differentiating between deionized water (H2O) and heavy water (D2O) with similar thermophysical properties and ~10% different mass densities, the signal-to-noise ratio (property differences over standard error) for H2O and D2O is increased by 9 and 5 times for thermal conductivity and specific heat capacity, respectively.
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Affiliation(s)
- Juhee Ko
- Department of Mechanical Engineering, Center for Extreme Thermal Physics and Manufacturing, Korea Advanced Institute of Science and Technology (KAIST), 34141 Daejeon, Korea
| | - Bong Jae Lee
- Department of Mechanical Engineering, Center for Extreme Thermal Physics and Manufacturing, Korea Advanced Institute of Science and Technology (KAIST), 34141 Daejeon, Korea
| | - Jungchul Lee
- Department of Mechanical Engineering, Center for Extreme Thermal Physics and Manufacturing, Korea Advanced Institute of Science and Technology (KAIST), 34141 Daejeon, Korea
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127
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Liu Y, Li X, Pei B, Ge L, Xiong Z, Zhang Z. Towards smart scanning probe lithography: a framework accelerating nano-fabrication process with in-situ characterization via machine learning. Microsyst Nanoeng 2023; 9:128. [PMID: 37829156 PMCID: PMC10564742 DOI: 10.1038/s41378-023-00587-z] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 07/09/2023] [Accepted: 08/20/2023] [Indexed: 10/14/2023]
Abstract
Scanning probe lithography (SPL) is a promising technology to fabricate high-resolution, customized and cost-effective features at the nanoscale. However, the quality of nano-fabrication, particularly the critical dimension, is significantly influenced by various SPL fabrication techniques and their corresponding process parameters. Meanwhile, the identification and measurement of nano-fabrication features are very time-consuming and subjective. To tackle these challenges, we propose a novel framework for process parameter optimization and feature segmentation of SPL via machine learning (ML). Different from traditional SPL techniques that rely on manual labeling-based experimental methods, the proposed framework intelligently extracts reliable and global information for statistical analysis to fine-tune and optimize process parameters. Based on the proposed framework, we realized the processing of smaller critical dimensions through the optimization of process parameters, and performed direct-write nano-lithography on a large scale. Furthermore, data-driven feature extraction and analysis could potentially provide guidance for other characterization methods and fabrication quality optimization.
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Affiliation(s)
- Yijie Liu
- State Key Laboratory of Tribology in Advanced Equipment, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084 China
- Beijing Key Laboratory of Precision/Ultra-precision Manufacturing Equipments and Control, Tsinghua University, Beijing, 100084 China
| | - Xuexuan Li
- State Key Laboratory of Tribology in Advanced Equipment, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084 China
- Beijing Key Laboratory of Precision/Ultra-precision Manufacturing Equipments and Control, Tsinghua University, Beijing, 100084 China
| | - Ben Pei
- Biomanufacturing Center, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084 China
- Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Beijing, 100084 China
- ‘Biomanufacturing and Engineering Living Systems’ Innovation International Talents Base (111 Base), Beijing, 100084 China
| | - Lin Ge
- NT-MDT Spectrum Instruments China office, Beijing, 100053 China
| | - Zhuo Xiong
- Biomanufacturing Center, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084 China
- Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Beijing, 100084 China
- ‘Biomanufacturing and Engineering Living Systems’ Innovation International Talents Base (111 Base), Beijing, 100084 China
| | - Zhen Zhang
- State Key Laboratory of Tribology in Advanced Equipment, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084 China
- Beijing Key Laboratory of Precision/Ultra-precision Manufacturing Equipments and Control, Tsinghua University, Beijing, 100084 China
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128
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Serrano MA, Vidaurre A, Meseguer-Dueñas JM, Tort-Ausina I, Quiles S, Sabater i Serra R, García-Sanchez T, Bernal-Pérez S, Gámiz-González MA, Molina-Mateo J, Gómez-Tejedor JA, Riera J. Active methods in electricity and magnetism courses: Influence of degree, academic level and gender on student performance. Heliyon 2023; 9:e20490. [PMID: 37842579 PMCID: PMC10568342 DOI: 10.1016/j.heliyon.2023.e20490] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 09/08/2023] [Accepted: 09/26/2023] [Indexed: 10/17/2023] Open
Abstract
The performance of first-year students in electromagnetism (E&M) courses of different engineering degrees at a Spanish public university was measured using the Brief Electricity and Magnetism Assessment (BEMA), a standard research-based instrument to assess students' understanding after attending introductory courses in electricity and magnetism. In all cases, Flipped classroom (FC) built on information and communications technology was used. The objective of this paper is to analyse if the gain in the BEMA pre and post-test results is influenced by several factors such as the degree, the students' academic grade, and gender. Moreover, as some studies have shown that the students' retention of the concepts was significantly stronger in active learning than in traditional approaches, a third BEMA test was performed by the students to analyse the long-term retention gain dependence on the same factors. Students from different engineering degree programs were asked to complete two BEMA tests during the course and a third one after a few months. ANOVA tests were used to analyse the existence of significant differences in gain between student degree programs, student academic level and student gender. Results have shown no differences in the BEMA performance by degree program, but significant differences were found by academic level and gender. Retention did not depend on the degree course but on the academic level. Mean gain value by academic level, and gender was obtained and concluded that the best students presented the best gain results and that gain depends on the students' gender: males outperformed females in the BEMA tests, although there were no significant differences in the course grades. It is thus necessary to understand these differences and to implement measures in daily teaching work to improve women's performance.
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Affiliation(s)
- María-Antonia Serrano
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46021, Spain
| | - Ana Vidaurre
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46021, Spain
| | - José M. Meseguer-Dueñas
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46021, Spain
| | - Isabel Tort-Ausina
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46021, Spain
| | - Susana Quiles
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46021, Spain
| | - Roser Sabater i Serra
- Electrical Engineering Department, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46021, Spain
| | - Tania García-Sanchez
- Electrical Engineering Department, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46021, Spain
| | - Soledad Bernal-Pérez
- Electrical Engineering Department, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46021, Spain
| | - M. Amparo Gámiz-González
- Departamento de Educación, Universidad Internacional de Valencia, C/ Pintor Sorolla, 21, 46002, Valencia, Spain
| | - José Molina-Mateo
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46021, Spain
| | - José Antonio Gómez-Tejedor
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46021, Spain
| | - Jaime Riera
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46021, Spain
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129
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Wei Y. The compact accelerator that keeps electrons on the straight and narrow. Nature 2023; 622:467-468. [PMID: 37853148 DOI: 10.1038/d41586-023-03101-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
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130
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Tang H, Li YQ, Wang MJ, Wang Y, Luo CB. Valorization of lignin-derived compounds into poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by engineered Halomonas sp. Y3. Int J Biol Macromol 2023; 249:126079. [PMID: 37536413 DOI: 10.1016/j.ijbiomac.2023.126079] [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: 04/24/2023] [Revised: 07/25/2023] [Accepted: 07/29/2023] [Indexed: 08/05/2023]
Abstract
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is a biopolyester with great potential, but its high production cost via the propionate-dependent pathway has hindered its development. Herein, we engineer Halomonas sp. Y3 to achieve efficient conversion of various LDCs into PHBV without propionate supplement. Initially, we successfully achieve PHBV production without propionate supplement by overexpressing threonine synthesis. The resulting biopolyester exhibits a 3 HV proportion of up to 7.89 mol%, comparable to commercial PHBV (8 mol%) available from Sigma Aldrich (403105). To further enhance PHBV production, we rationally design the reconstruction of aromatic compound catabolism. The engineered strain Y3_18 efficiently assimilates all LDCs containing syringyl (S), guaiacyl (G), and p-hydroxyphenyl-type (H) units. From 1 g/L of S-, G-, and H-type LDCs, Y3_18 produces PHBV at levels of 449 mg/L, 488 mg/L, and 716 mg/L, respectively, with yields of 44.9 % (g/g), 48.8 % (g/g), and 71.6 % (g/g). Moreover, to improve PHBV yield from lignin, we integrate laccase-secretion and PHBV production modules. This integration leads to the accumulation of 425.84 mg/L of PHBV with a yield of 21.29 % (g/g) and a 3 HV proportion of 6.38 mol%. By harnessing the capabilities of Halomonas sp. Y3, we demonstrate an efficient and sustainable approach for PHBV production from a variety of LDCs.
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Affiliation(s)
- Hao Tang
- College of Life Science, Leshan Normal University, Leshan 614000, China
| | - Yuan-Qiu Li
- College of Life Science, Leshan Normal University, Leshan 614000, China
| | - Ming-Jun Wang
- College of Life Science, Leshan Normal University, Leshan 614000, China
| | - Yan Wang
- College of Life Science, Leshan Normal University, Leshan 614000, China.
| | - Chao-Bing Luo
- College of Life Science, Leshan Normal University, Leshan 614000, China.
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131
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Meng J, Liu S, Gao L, Hong K, Liu S, Wu X. Economical production of Pichia pastoris single cell protein from methanol at industrial pilot scale. Microb Cell Fact 2023; 22:198. [PMID: 37770920 PMCID: PMC10540378 DOI: 10.1186/s12934-023-02198-9] [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: 03/31/2023] [Accepted: 09/06/2023] [Indexed: 09/30/2023] Open
Abstract
BACKGROUND Methanol, synthesized from CO2, is a potentially sustainable one-carbon (C1) resource for biomanufacturing. The use of methanol as a feedstock to produce single cell protein (SCP) has been investigated for decades as an alternative to alleviate the high global demand for animal-derived proteins. The methylotrophic yeast Pichia pastoris is an ideal host for methanol-based SCP synthesis due to its natural methanol assimilation ability. However, improving methanol utilization, tolerance to higher temperature, and the protein content of P. pastoris are also current challenges, which are of great significance to the economical industrial application using methanol as a feedstock for SCP production. RESULTS In the present work, adaptive laboratory evolution (ALE) has been employed to overcome the low methanol utilization efficiency and intolerance to a higher temperature of 33 °C in P. pastoris, associated with reduced carbon loss due to the lessened detoxification of intracellular formaldehyde through the dissimilation pathway and cell wall rearrangement to temperature stress resistance following long-term evolution as revealed by transcriptomic and phenotypic analysis. By strengthening nitrogen metabolism and impairing cell wall synthesis, metabolic engineering further increased protein content. Finally, the engineered strain via multi-strategy produced high levels of SCP from methanol in a pilot-scale fed-batch culture at 33 °C with a biomass of 63.37 g DCW/L, methanol conversion rate of 0.43 g DCW/g, and protein content of 0.506 g/g DCW. SCP obtained from P. pastoris contains a higher percentage of protein compared to conventional foods like soy, fish, meat, whole milk, and is a source of essential amino acids, including methionine, lysine, and branched-chain amino acids (BCAAs: valine, isoleucine, leucine). CONCLUSIONS This study clarified the unique mechanism of P. pastoris for efficient methanol utilization, higher temperature resistance, and high protein synthesis, providing a P. pastoris cell factory for SCP production with environmental, economic, and nutritional benefits.
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Affiliation(s)
- Jiao Meng
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, No. 32, Xiqi Road, Tianjin Airport Economic Park, 300308, Tianjin, Tianjin, China
| | - Shufan Liu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, No. 32, Xiqi Road, Tianjin Airport Economic Park, 300308, Tianjin, Tianjin, China
| | - Le Gao
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, No. 32, Xiqi Road, Tianjin Airport Economic Park, 300308, Tianjin, Tianjin, China
| | - Kai Hong
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, No. 32, Xiqi Road, Tianjin Airport Economic Park, 300308, Tianjin, Tianjin, China
| | - Shuguang Liu
- Ningxia Future Biotechnology Co., Ltd, Jingsan Road, Ningdong Linhe Industrial Zone, Ningdong Town, Ningxia, China
| | - Xin Wu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, No. 32, Xiqi Road, Tianjin Airport Economic Park, 300308, Tianjin, Tianjin, China.
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132
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Callaway E. These ancient whittled logs could be the earliest known wooden structure. Nature 2023:10.1038/d41586-023-02928-4. [PMID: 37730787 DOI: 10.1038/d41586-023-02928-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
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133
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Wei G, Liu Y, Jiao B, Chang N, Wu M, Liu G, Lin X, Weng X, Chen J, Zhang L, Zhu C, Wang G, Xu P, Di J, Li Q. Direct recycling of spent Li-ion batteries: Challenges and opportunities toward practical applications. iScience 2023; 26:107676. [PMID: 37680490 PMCID: PMC10480636 DOI: 10.1016/j.isci.2023.107676] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023] Open
Abstract
With the exponential expansion of electric vehicles (EVs), the disposal of Li-ion batteries (LIBs) is poised to increase significantly in the coming years. Effective recycling of these batteries is essential to address environmental concerns and tap into their economic value. Direct recycling has recently emerged as a promising solution at the laboratory level, offering significant environmental benefits and economic viability compared to pyrometallurgical and hydrometallurgical recycling methods. However, its commercialization has not been realized in the terms of financial feasibility. This perspective provides a comprehensive analysis of the obstacles that impede the practical implementation of direct recycling, ranging from disassembling, sorting, and separation to technological limitations. Furthermore, potential solutions are suggested to tackle these challenges in the short term. The need for long-term, collaborative endeavors among manufacturers, battery producers, and recycling companies is outlined to advance fully automated recycling of spent LIBs. Lastly, a smart direct recycling framework is proposed to achieve the full life cycle sustainability of LIBs.
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Affiliation(s)
- Gaolei Wei
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, Department of Materials Science and Engineering, Harbin Engineering University, Harbin 150001, China
- Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Yuxuan Liu
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, Department of Materials Science and Engineering, Harbin Engineering University, Harbin 150001, China
- Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Binglei Jiao
- Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
- Department of Chemistry College of Science Shanghai University, Shanghai 200444, China
| | - Nana Chang
- Gusu Laboratory of Materials, Suzhou 215123, China
| | - Mengting Wu
- Gusu Laboratory of Materials, Suzhou 215123, China
| | - Gangfeng Liu
- Suzhou Botree Cycling Sci & Tech Co., Ltd, Suzhou 215128, China
| | - Xiao Lin
- Suzhou Botree Cycling Sci & Tech Co., Ltd, Suzhou 215128, China
| | - XueFei Weng
- Vacuum Interconnected Nanotech Workstation, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Jinxing Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, Jiangsu, P. R.China
| | - Liang Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, Jiangsu, P. R.China
| | - Chunling Zhu
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, Department of Materials Science and Engineering, Harbin Engineering University, Harbin 150001, China
| | - Guiling Wang
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, Department of Materials Science and Engineering, Harbin Engineering University, Harbin 150001, China
| | - Panpan Xu
- Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Jiangtao Di
- Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
| | - Qingwen Li
- Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
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134
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Liang H, Dong H, Zhang C, Geng Y, Liu X, Liu G, Zhong C. Combining LCA-MFA models to identify China's plastic value chain environmental impact mitigation pathways. iScience 2023; 26:107701. [PMID: 37694146 PMCID: PMC10483054 DOI: 10.1016/j.isci.2023.107701] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 07/31/2023] [Accepted: 08/17/2023] [Indexed: 09/12/2023] Open
Abstract
Characterizing material flows and environmental impacts of plastic value chain is crucial for sustainable plastic management. Here, we combine material flow analysis and life cycle assessment methods to map the flows of eight major plastics and investigate the multiple environmental impacts of China's plastic value chain. We find that packaging and textile sectors dominate plastic consumption and are responsible for the value chain environmental burdens, but with low recycling rates. Major environmental impacts are generated in plastic production and product manufacturing stages because of the consumption of coal-based feedstocks and electricity. We therefore set up six scenarios by considering carbon neutrality energy pathway, plastic recycling improvement, and technology updating, finding that the value chain environmental impact can be reduced by 14%-57% in 2060 under combined scenario. Particularly, carbon neutrality renewable energy pathway plays an important role. These findings provide valuable insights to identify key mitigation pathways for plastic value chain.
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Affiliation(s)
- Hongda Liang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Huijuan Dong
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chenyi Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yong Geng
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, Shanghai Jiao Tong University, Shanghai 200240, China
- School of International and Public Affairs, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Xiao Liu
- China Institute for Urban Governance, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Gang Liu
- College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Chen Zhong
- School of International and Public Affairs, Shanghai Jiao Tong University, Shanghai 200030, China
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135
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Yu F, Feng W, Luo M, You K, Ma M, Jiang R, Leng J, Sun L. Techno-economic analysis of residential building heating strategies for cost-effective upgrades in European cities. iScience 2023; 26:107541. [PMID: 37680479 PMCID: PMC10480630 DOI: 10.1016/j.isci.2023.107541] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 05/08/2023] [Accepted: 07/27/2023] [Indexed: 09/09/2023] Open
Abstract
The energy crisis in Europe requires cost-effective evaluations of residential heating strategies to reduce costs and mitigate greenhouse gas emissions. This research studied different heating systems in China and Europe. Based on heating energy surveys, simulation models were developed and further expanded for European cities. Monte Carlo analyses were conducted to understand the heating demand and utility costs in Rome, Madrid, and Athens. The sensitivity analysis found that electrifying heating systems with heat pumps can reduce household heating costs and mitigate European cities' dependence on natural gas. However, the high upfront investment may hinder the cost-effective deployment of high-performance heat pump systems. Building envelope retrofits can also provide plausible energy savings despite relatively long payback periods. Financial incentive analyses were conducted to quantify how fiscal measures can improve technologies' techno-economic performance. Finally, the paper provided policy recommendations on future building cost-effective retrofits and heating electrification in Europe.
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Affiliation(s)
- Fei Yu
- Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 90-2112, Berkeley, CA 94720, USA
- Southeast University, Architecture Department, Nanjing 210008, China
- Beijing University of Technology, Faculty of Architecture, Civil and Transportation Engineering, Beijing 100124, China
| | - Wei Feng
- Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 90-2112, Berkeley, CA 94720, USA
- Faculty of Materials Science and Energy Engineering, Shenzhen Institute of Advanced Technology, Shenzhen 518055, China
| | - Maohui Luo
- Tongji University, School of Mechanical Engineering, Shanghai 201804, China
| | - Kairui You
- Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Minda Ma
- Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 90-2112, Berkeley, CA 94720, USA
| | - Rui Jiang
- Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Jiawei Leng
- Southeast University, Architecture Department, Nanjing 210008, China
- Nanjing Urban Planning Design Institute of Southeast University, Nanjing 210096, China
| | - Liqun Sun
- Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
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136
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Marshall M. Why was the Morocco earthquake so deadly? Nature 2023:10.1038/d41586-023-02880-3. [PMID: 37699998 DOI: 10.1038/d41586-023-02880-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
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137
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Huang S, Wu J, Zheng L, Long Y, Chen J, Li J, Dai B, Lin F, Zhuang S, Zhang D. 3D free-assembly modular microfluidics inspired by movable type printing. Microsyst Nanoeng 2023; 9:111. [PMID: 37705925 PMCID: PMC10495351 DOI: 10.1038/s41378-023-00585-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 07/30/2023] [Accepted: 08/01/2023] [Indexed: 09/15/2023]
Abstract
Reconfigurable modular microfluidics presents an opportunity for flexibly constructing prototypes of advanced microfluidic systems. Nevertheless, the strategy of directly integrating modules cannot easily fulfill the requirements of common applications, e.g., the incorporation of materials with biochemical compatibility and optical transparency and the execution of small batch production of disposable chips for laboratory trials and initial tests. Here, we propose a manufacturing scheme inspired by the movable type printing technique to realize 3D free-assembly modular microfluidics. Double-layer 3D microfluidic structures can be produced by replicating the assembled molds. A library of modularized molds is presented for flow control, droplet generation and manipulation and cell trapping and coculture. In addition, a variety of modularized attachments, including valves, light sources and microscopic cameras, have been developed with the capability to be mounted onto chips on demand. Microfluidic systems, including those for concentration gradient generation, droplet-based microfluidics, cell trapping and drug screening, are demonstrated. This scheme enables rapid prototyping of microfluidic systems and construction of on-chip research platforms, with the intent of achieving high efficiency of proof-of-concept tests and small batch manufacturing.
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Affiliation(s)
- Shaoqi Huang
- Engineering Research Center of Optical Instrument and System, the Ministry of Education, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, 200093 China
| | - Jiandong Wu
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055 China
| | - Lulu Zheng
- Engineering Research Center of Optical Instrument and System, the Ministry of Education, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, 200093 China
| | - Yan Long
- Engineering Research Center of Optical Instrument and System, the Ministry of Education, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, 200093 China
| | - Junyi Chen
- Engineering Research Center of Optical Instrument and System, the Ministry of Education, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, 200093 China
| | - Jianlang Li
- Engineering Research Center of Optical Instrument and System, the Ministry of Education, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, 200093 China
| | - Bo Dai
- Engineering Research Center of Optical Instrument and System, the Ministry of Education, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, 200093 China
| | - Francis Lin
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2 Canada
| | - Songlin Zhuang
- Engineering Research Center of Optical Instrument and System, the Ministry of Education, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, 200093 China
| | - Dawei Zhang
- Engineering Research Center of Optical Instrument and System, the Ministry of Education, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, 200093 China
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138
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Alexandre L, Araya-Farias M, Nguyen ML, Naoumi N, Gropplero G, Gizeli E, Malaquin L, Descroix S. High-throughput extraction on a dynamic solid phase for low-abundance biomarker isolation from biological samples. Microsyst Nanoeng 2023; 9:109. [PMID: 37680311 PMCID: PMC10480215 DOI: 10.1038/s41378-023-00582-4] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/25/2023] [Accepted: 07/13/2023] [Indexed: 09/09/2023]
Abstract
Liquid biopsy, in particular circulating tumor DNA (ctDNA) analysis, has paved the way for a new noninvasive approach to cancer diagnosis, treatment selection and follow-up. As a crucial step in the analysis, the extraction of the genetic material from a complex matrix needs to meet specific requirements such as high specificity and low loss of target. Here, we developed a new generation of microfluidic fluidized beds (FBs) that enable the efficient extraction and preconcentration of specific ctDNA sequences from human serum with flow rates up to 15 µL/min. We first demonstrated that implementation of a vibration system inducing flow rate fluctuations combined with a mixture of different bead sizes significantly enhanced bead homogeneity, thereby increasing capture efficiency. Taking advantage of this new generation of high-throughput magnetic FBs, we then developed a new method to selectively capture a double-stranded (dsDNA) BRAF mutated DNA sequence in complex matrices such as patient serum. Finally, as proof of concept, ligation chain reaction (LCR) assays were performed to specifically amplify a mutated BRAF sequence, allowing the detection of concentrations as low as 6 × 104 copies/µL of the mutated DNA sequence in serum.
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Affiliation(s)
- Lucile Alexandre
- Laboratoire Physico-Chimie Curie, CNRS UMR 168, Institut Curie, PSL Research University, Paris, France
- Institut Pierre-Gilles de Gennes (IPGG), Sorbonne University, Paris, France
| | - Monica Araya-Farias
- Laboratoire Physico-Chimie Curie, CNRS UMR 168, Institut Curie, PSL Research University, Paris, France
- Institut Pierre-Gilles de Gennes (IPGG), Sorbonne University, Paris, France
- Present Address: Frédéric Joliot Institute for Life Sciences, Pharmacology and Immunoanalysis Unit, Immunoanalysis Studies and Research Laboratory, Alternative Energies and Atomic Energy Commission (CEA), Gif-sur-Yvette, France
| | - Manh-Louis Nguyen
- Laboratoire Physico-Chimie Curie, CNRS UMR 168, Institut Curie, PSL Research University, Paris, France
- Institut Pierre-Gilles de Gennes (IPGG), Sorbonne University, Paris, France
| | - Nikoletta Naoumi
- Department of Biology, University of Crete, Heraklion, Greece
- Institute of Molecular Biology and Biotechnology (IMBB) - FORTH, Heraklion, Greece
| | - Giacomo Gropplero
- Laboratoire Physico-Chimie Curie, CNRS UMR 168, Institut Curie, PSL Research University, Paris, France
- Institut Pierre-Gilles de Gennes (IPGG), Sorbonne University, Paris, France
| | - Electra Gizeli
- Department of Biology, University of Crete, Heraklion, Greece
- Institute of Molecular Biology and Biotechnology (IMBB) - FORTH, Heraklion, Greece
| | - Laurent Malaquin
- Laboratoire d’analyse et d’architecture des systèmes (LAAS) CNRS, Elia Group, Toulouse, France
| | - Stéphanie Descroix
- Laboratoire Physico-Chimie Curie, CNRS UMR 168, Institut Curie, PSL Research University, Paris, France
- Institut Pierre-Gilles de Gennes (IPGG), Sorbonne University, Paris, France
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139
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Xiang T. Heishan Gorge project: learn from past oversights. Nature 2023; 621:42. [PMID: 37670056 DOI: 10.1038/d41586-023-02751-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
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140
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Wicaksono AGC, Korom E. Attitudes towards science in higher education: Validation of questionnaire among science teacher candidates and engineering students in Indonesia. Heliyon 2023; 9:e20023. [PMID: 37809455 PMCID: PMC10559740 DOI: 10.1016/j.heliyon.2023.e20023] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 08/25/2023] [Accepted: 09/08/2023] [Indexed: 10/10/2023] Open
Abstract
In higher education, academic success and failure can be affected by students' affective states, such as their attitudes towards courses and learning. Many studies highlight the role of attitudes in the educational process resulting in a high demand for attitude assessments to plan comprehensive instructional strategies. The present study assessed and compared attitudes towards science in higher education. A total of 296 Indonesian undergraduate students from science teacher training and engineering majors participated in this study by completing the online Attitudes Towards Science Questionnaire (ATSQ). The validation analysis with confirmatory factor analysis and the Rasch model was performed to measure the instrument's properties resulting in a good fit model for the questionnaire's theoretical construct with acceptable individual fit items. Comparing the attitudes of science teacher candidates and engineering students, no significant differences were found in attitude towards science. Both groups revealed moderate attitudes, with higher responses to the science value variable, followed by enjoyment and confidence, anxiety and difficulty, and participation in science learning and activities. However, there were differences in the pattern of correlations between the variables, especially for anxiety and difficulty. The ATSQ has good psychometric properties and therefore can be used in research to assess attitudes towards science. It can stimulate further research in different contexts to confirm empirical evidence and promote attitude development in higher education.
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Affiliation(s)
| | - Erzsébet Korom
- Department of Learning and Instruction, Institute of Education, University of Szeged, Hungary
- MTA–SZTE Digital Learning Technologies Research Group, Hungary
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141
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Couto PS, Stibbs DJ, Rotondi MC, Takeuchi Y, Rafiq QA. Scalable manufacturing of gene-modified human mesenchymal stromal cells with microcarriers in spinner flasks. Appl Microbiol Biotechnol 2023; 107:5669-5685. [PMID: 37470820 PMCID: PMC10439856 DOI: 10.1007/s00253-023-12634-w] [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: 02/06/2023] [Revised: 06/06/2023] [Accepted: 06/11/2023] [Indexed: 07/21/2023]
Abstract
Due to their immunomodulatory properties and in vitro differentiation ability, human mesenchymal stromal cells (hMSCs) have been investigated in more than 1000 clinical trials over the last decade. Multiple studies that have explored the development of gene-modified hMSC-based products are now reaching early stages of clinical trial programmes. From an engineering perspective, the challenge lies in developing manufacturing methods capable of producing sufficient doses of ex vivo gene-modified hMSCs for clinical applications. This work demonstrates, for the first time, a scalable manufacturing process using a microcarrier-bioreactor system for the expansion of gene-modified hMSCs. Upon isolation, umbilical cord tissue mesenchymal stromal cells (UCT-hMSCs) were transduced using a lentiviral vector (LV) with green fluorescent protein (GFP) or vascular endothelial growth factor (VEGF) transgenes. The cells were then seeded in 100 mL spinner flasks using Spherecol microcarriers and expanded for seven days. After six days in culture, both non-transduced and transduced cell populations attained comparable maximum cell concentrations (≈1.8 × 105 cell/mL). Analysis of the culture supernatant identified that glucose was fully depleted after day five across the cell populations. Lactate concentrations observed throughout the culture reached a maximum of 7.5 mM on day seven. Immunophenotype analysis revealed that the transduction followed by an expansion step was not responsible for the downregulation of the cell surface receptors used to identify hMSCs. The levels of CD73, CD90, and CD105 expressing cells were above 90% for the non-transduced and transduced cells. In addition, the expression of negative markers (CD11b, CD19, CD34, CD45, and HLA-DR) was also shown to be below 5%, which is aligned with the criteria established for hMSCs by the International Society for Cell and Gene Therapy (ISCT). This work provides a foundation for the scalable manufacturing of gene-modified hMSCs which will overcome a significant translational and commercial bottleneck. KEY POINTS: • hMSCs were successfully transduced by lentiviral vectors carrying two different transgenes: GFP and VEGF • Transduced hMSCs were successfully expanded on microcarriers using spinner flasks during a period of 7 days • The genetic modification step did not cause any detrimental impact on the hMSC immunophenotype characteristics.
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Affiliation(s)
- Pedro Silva Couto
- Department of Biochemical Engineering, Advanced Centre for Biochemical Engineering, University College London, Gower Street, London, WC1E 6BT UK
| | - Dale J. Stibbs
- Department of Biochemical Engineering, Advanced Centre for Biochemical Engineering, University College London, Gower Street, London, WC1E 6BT UK
| | - Marco C. Rotondi
- Department of Biochemical Engineering, Advanced Centre for Biochemical Engineering, University College London, Gower Street, London, WC1E 6BT UK
| | - Yasuhiro Takeuchi
- Division of Infection and Immunity, University College London, Gower Street, London, WC1E 6BT UK
- Biotherapeutics and Advanced Therapies, Scientific Research and Innovation, Medicines, and Healthcare Products Regulatory Agency, South Mimms, EN6 3QG UK
| | - Qasim A. Rafiq
- Department of Biochemical Engineering, Advanced Centre for Biochemical Engineering, University College London, Gower Street, London, WC1E 6BT UK
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142
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Fox D. AI finally beats humans at a real-life sport - drone racing. Nature 2023:10.1038/d41586-023-02719-x. [PMID: 37648829 DOI: 10.1038/d41586-023-02719-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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143
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Nah MC, Krotov A, Russo M, Sternad D, Hogan N. Learning to manipulate a whip with simple primitive actions - A simulation study. iScience 2023; 26:107395. [PMID: 37554449 PMCID: PMC10405071 DOI: 10.1016/j.isci.2023.107395] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 05/26/2023] [Accepted: 07/11/2023] [Indexed: 08/10/2023] Open
Abstract
This simulation study investigated whether a 4-degrees-of-freedom (DOF) arm could strike a target with a 50-DOF whip using a motion profile similar to discrete human movements. The interactive dynamics of the multi-joint arm was modeled as a constant joint-space mechanical impedance, with values derived from experimental measurement. Targets at various locations could be hit with a single maximally smooth motion in joint-space coordinates. The arm movements that hit the targets were identified with fewer than 250 iterations. The optimal actions were essentially planar arm motions in extrinsic task-space coordinates, predominantly oriented along the most compliant direction of both task-space and joint-space mechanical impedances. Of the optimal movement parameters, striking a target was most sensitive to movement duration. This result suggests that the elementary actions observed in human motor behavior may support efficient motor control in interaction with a dynamically complex object.
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Affiliation(s)
- Moses C. Nah
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Aleksei Krotov
- Department of Bioengineering, Northeastern University, Boston, MA 02115, USA
| | - Marta Russo
- Department of Biology, Northeastern University, Boston, MA 02115, USA
- Department of Neurology, Policlinico Tor Vergata and the Laboratory of Neuromotor Physiology, IRCCS Santa Lucia Foundation, Rome, Italy
| | - Dagmar Sternad
- Department of Biology, Department of Electrical and Computer Engineering, Department of Physics, Institute of Experiential Robotics, Northeastern University, Boston, MA 02115, USA
| | - Neville Hogan
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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144
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Liu J, Chen J, Yan G, Chen W, Xu B. Clustering and dynamic recognition based auto-reservoir neural network: A wait-and-see approach for short-term park power load forecasting. iScience 2023; 26:107456. [PMID: 37575195 PMCID: PMC10415916 DOI: 10.1016/j.isci.2023.107456] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/21/2023] [Accepted: 07/19/2023] [Indexed: 08/15/2023] Open
Abstract
This paper proposes a novel clustering and dynamic recognition-based auto-reservoir neural network (CDbARNN) for short-term load forecasting (STLF) of industrial park microgrids. In CDbARNN, the available load sets are first decomposed into several clusters via K-means clustering. Then, by extracting characteristic information of the load series input to CDbARNN and the load curves belonging to each cluster center, a dynamic recognition technology is developed to identify which cluster of the input load series belongs to. After that, the input load series and the load curves of the cluster to which it belongs constitute a short-term high-dimensional matrix entered into the reservoir of CDbARNN. Finally, reservoir node numbers of CDbARNN which are used to match different clusters are optimized. Numerical experiments conducted on STLF of an actual industrial park microgrid indicate the dominating performance of the proposed approach through several cases and comparisons with other well-known deep learning methods.
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Affiliation(s)
- Jingyao Liu
- School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
| | - Jiajia Chen
- School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
| | - Guijin Yan
- School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
| | - Wengang Chen
- School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
| | - Bingyin Xu
- School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
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145
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Tsanni A. The Indigenous rocketeer. Nature 2023:10.1038/d41586-023-02635-0. [PMID: 37592129 DOI: 10.1038/d41586-023-02635-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
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146
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Debnath R, Creutzig F, Sovacool BK, Shuckburgh E. Harnessing human and machine intelligence for planetary-level climate action. NPJ Clim Action 2023; 2:20. [PMID: 38694954 PMCID: PMC11062317 DOI: 10.1038/s44168-023-00056-3] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 07/24/2023] [Indexed: 05/04/2024]
Abstract
The ongoing global race for bigger and better artificial intelligence (AI) systems is expected to have a profound societal and environmental impact by altering job markets, disrupting business models, and enabling new governance and societal welfare structures that can affect global consensus for climate action pathways. However, the current AI systems are trained on biased datasets that could destabilize political agencies impacting climate change mitigation and adaptation decisions and compromise social stability, potentially leading to societal tipping events. Thus, the appropriate design of a less biased AI system that reflects both direct and indirect effects on societies and planetary challenges is a question of paramount importance. In this paper, we tackle the question of data-centric knowledge generation for climate action in ways that minimize biased AI. We argue for the need to co-align a less biased AI with an epistemic web on planetary health challenges for more trustworthy decision-making. A human-in-the-loop AI can be designed to align with three goals. First, it can contribute to a planetary epistemic web that supports climate action. Second, it can directly enable mitigation and adaptation interventions through knowledge of social tipping elements. Finally, it can reduce the data injustices associated with AI pretraining datasets.
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Affiliation(s)
- Ramit Debnath
- Cambridge Zero and Department of Computer Science and Technology, University of Cambridge, Cambridge, CB3 0FD United Kingdom
- Division of Humanities and Social Science, California Institute of Technology, Pasadena, CA, 91125 USA
| | - Felix Creutzig
- Mercator Research Institute on Global Commons and Climate Change, Berlin, 10829 Germany
- Technical University Berlin, Berlin, 10827 Germany
| | - Benjamin K. Sovacool
- Center for Energy Technologies, Department of Business Development and Technology, Aarhus University, Aarhus, Denmark
- Science Policy Research Unit, University of Sussex Business School, Brighton, United Kingdom
- Institute for Global Sustainability, Department of Earth and Environment, Boston University, Boston, MA, USA
| | - Emily Shuckburgh
- Cambridge Zero and Department of Computer Science and Technology, University of Cambridge, Cambridge, CB3 0FD United Kingdom
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147
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Luo Z, Zhang H, Chen R, Li H, Cheng F, Zhang L, Liu J, Kong T, Zhang Y, Wang H. Digital light processing 3D printing for microfluidic chips with enhanced resolution via dosing- and zoning-controlled vat photopolymerization. Microsyst Nanoeng 2023; 9:103. [PMID: 37593440 PMCID: PMC10427687 DOI: 10.1038/s41378-023-00542-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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 04/07/2023] [Accepted: 04/10/2023] [Indexed: 08/19/2023]
Abstract
Conventional manufacturing techniques to fabricate microfluidic chips, such as soft lithography and hot embossing process, have limitations that include difficulty in preparing multiple-layered structures, cost- and labor-consuming fabrication process, and low productivity. Digital light processing (DLP) technology has recently emerged as a cost-efficient microfabrication approach for the 3D printing of microfluidic chips; however, the fabrication resolution for microchannels is still limited to sub-100 microns at best. Here, we developed an innovative DLP printing strategy for high resolution and scalable microchannel fabrication by dosing- and zoning-controlled vat photopolymerization (DZC-VPP). Specifically, we proposed a modified mathematical model to precisely predict the accumulated UV irradiance for resin photopolymerization, thereby providing guidance for the fabrication of microchannels with enhanced resolution. By fine-tuning the printing parameters, including optical irradiance, exposure time, projection region, and step distance, we can precisely tailor the penetration irradiance stemming from the photopolymerization of the neighboring resin layers, thereby preventing channel blockage due to UV overexposure or compromised bonding stability owing to insufficient resin curing. Remarkably, this strategy can allow the preparation of microchannels with cross-sectional dimensions of 20 μm × 20 μm using a commercial printer with a pixel size of 10 μm × 10 μm; this is significantly higher resolution than previous reports. In addition, this method can enable the scalable and biocompatible fabrication of microfluidic drop-maker units that can be used for cell encapsulation. In general, the current DZC-VPP method can enable major advances in precise and scalable microchannel fabrication and represents a significant step forward for widespread applications of microfluidics-based techniques in biomedical fields.
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Affiliation(s)
- Zhiming Luo
- School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518000 P. R. China
| | - Haoyue Zhang
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, School of Bioengineering, Dalian University of Technology, Dalian, 116024 P. R. China
| | - Runze Chen
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, School of Bioengineering, Dalian University of Technology, Dalian, 116024 P. R. China
| | - Hanting Li
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, School of Bioengineering, Dalian University of Technology, Dalian, 116024 P. R. China
| | - Fang Cheng
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, School of Bioengineering, Dalian University of Technology, Dalian, 116024 P. R. China
| | - Lijun Zhang
- Third People’s Hospital of Dalian, Dalian Eye Hospital, Dalian, 116024 P. R. China
| | - Jia Liu
- Central Laboratory, The Second Affiliated Hospital of The, Chinese University of Hong Kong, Shenzhen, 518172 P. R. China
| | - Tiantian Kong
- School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518000 P. R. China
| | - Yang Zhang
- School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518000 P. R. China
| | - Huanan Wang
- School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518000 P. R. China
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, School of Bioengineering, Dalian University of Technology, Dalian, 116024 P. R. China
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148
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From the archive: a prize for the design of a helicopter, and a venomous caterpillar. Nature 2023. [PMID: 37582938 DOI: 10.1038/d41586-023-02354-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
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149
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Bundell S. These shapes roll in peculiar ways thanks to new mathematics. Nature 2023:10.1038/d41586-023-02538-0. [PMID: 37558793 DOI: 10.1038/d41586-023-02538-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
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150
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Li Z, Wang K, Hou C, Li C, Zhang F, Ren W, Dong L, Zhao J. Self-sensing intelligent microrobots for noninvasive and wireless monitoring systems. Microsyst Nanoeng 2023; 9:102. [PMID: 37565051 PMCID: PMC10409863 DOI: 10.1038/s41378-023-00574-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/01/2023] [Accepted: 07/10/2023] [Indexed: 08/12/2023]
Abstract
Microrobots have garnered tremendous attention due to their small size, flexible movement, and potential for various in situ treatments. However, functional modification of microrobots has become crucial for their interaction with the environment, except for precise motion control. Here, a novel artificial intelligence (AI) microrobot is designed that can respond to changes in the external environment without an onboard energy supply and transmit signals wirelessly in real time. The AI microrobot can cooperate with external electromagnetic imaging equipment and enhance the local radiofrequency (RF) magnetic field to achieve a large penetration sensing depth and a high spatial resolution. The working ranges are determined by the structure of the sensor circuit, and the corresponding enhancement effect can be modulated by the conductivity and permittivity of the surrounding environment, reaching ~560 times at most. Under the control of an external magnetic field, the magnetic tail can actuate the microrobotic agent to move accurately, with great potential to realize in situ monitoring in different places in the human body, almost noninvasively, especially around potential diseases, which is of great significance for early disease discovery and accurate diagnosis. In addition, the compatible fabrication process can produce swarms of functional microrobots. The findings highlight the feasibility of the self-sensing AI microrobots for the development of in situ diagnosis or even treatment according to sensing signals.
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Affiliation(s)
- Zhongyi Li
- School of Mechatronical Engineering, Beijing Institute of Technology, 100081 Beijing, China
- Beijing Advanced Innovation Center for Intelligent Robots and Systems, Beijing Institute of Technology, 100081 Beijing, China
| | - Kun Wang
- Department of Biomedical Engineering, City University of Hong Kong, 999077 Kowloon Tong, Hong Kong China
| | - Chaojian Hou
- Department of Biomedical Engineering, City University of Hong Kong, 999077 Kowloon Tong, Hong Kong China
| | - Chunyang Li
- School of Mechatronical Engineering, Beijing Institute of Technology, 100081 Beijing, China
- Beijing Advanced Innovation Center for Intelligent Robots and Systems, Beijing Institute of Technology, 100081 Beijing, China
| | - Fanqing Zhang
- School of Mechatronical Engineering, Beijing Institute of Technology, 100081 Beijing, China
- Beijing Advanced Innovation Center for Intelligent Robots and Systems, Beijing Institute of Technology, 100081 Beijing, China
| | - Wu Ren
- School of Integrated Circuits and Electronics, Beijing Institute of Technology, 100081 Beijing, China
| | - Lixin Dong
- Department of Biomedical Engineering, City University of Hong Kong, 999077 Kowloon Tong, Hong Kong China
| | - Jing Zhao
- School of Mechatronical Engineering, Beijing Institute of Technology, 100081 Beijing, China
- Beijing Advanced Innovation Center for Intelligent Robots and Systems, Beijing Institute of Technology, 100081 Beijing, China
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