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Park S, Kim M, Nam H, Kwon J, Im CH. In-Car Environment Control Using an SSVEP-Based Brain-Computer Interface with Visual Stimuli Presented on Head-Up Display: Performance Comparison with a Button-Press Interface. Sensors (Basel) 2024; 24:545. [PMID: 38257638 PMCID: PMC10819861 DOI: 10.3390/s24020545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 01/04/2024] [Accepted: 01/12/2024] [Indexed: 01/24/2024]
Abstract
Controlling the in-car environment, including temperature and ventilation, is necessary for a comfortable driving experience. However, it often distracts the driver's attention, potentially causing critical car accidents. In the present study, we implemented an in-car environment control system utilizing a brain-computer interface (BCI) based on steady-state visual evoked potential (SSVEP). In the experiment, four visual stimuli were displayed on a laboratory-made head-up display (HUD). This allowed the participants to control the in-car environment by simply staring at a target visual stimulus, i.e., without pressing a button or averting their eyes from the front. The driving performances in two realistic driving tests-obstacle avoidance and car-following tests-were then compared between the manual control condition and SSVEP-BCI control condition using a driving simulator. In the obstacle avoidance driving test, where participants needed to stop the car when obstacles suddenly appeared, the participants showed significantly shorter response time (1.42 ± 0.26 s) in the SSVEP-BCI control condition than in the manual control condition (1.79 ± 0.27 s). No-response rate, defined as the ratio of obstacles that the participants did not react to, was also significantly lower in the SSVEP-BCI control condition (4.6 ± 14.7%) than in the manual control condition (20.5 ± 25.2%). In the car-following driving test, where the participants were instructed to follow a preceding car that runs at a sinusoidally changing speed, the participants showed significantly lower speed difference with the preceding car in the SSVEP-BCI control condition (15.65 ± 7.04 km/h) than in the manual control condition (19.54 ± 11.51 km/h). The in-car environment control system using SSVEP-based BCI showed a possibility that might contribute to safer driving by keeping the driver's focus on the front and thereby enhancing the overall driving performance.
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Affiliation(s)
- Seonghun Park
- Department of Electronic Engineering, Hanyang University, Seoul 04763, Republic of Korea; (S.P.); (J.K.)
| | - Minsu Kim
- Department of Artificial Intelligence, Hanyang University, Seoul 04763, Republic of Korea; (M.K.); (H.N.)
| | - Hyerin Nam
- Department of Artificial Intelligence, Hanyang University, Seoul 04763, Republic of Korea; (M.K.); (H.N.)
| | - Jinuk Kwon
- Department of Electronic Engineering, Hanyang University, Seoul 04763, Republic of Korea; (S.P.); (J.K.)
| | - Chang-Hwan Im
- Department of Electronic Engineering, Hanyang University, Seoul 04763, Republic of Korea; (S.P.); (J.K.)
- Department of Artificial Intelligence, Hanyang University, Seoul 04763, Republic of Korea; (M.K.); (H.N.)
- Department of Biomedical Engineering, Hanyang University, Seoul 04763, Republic of Korea
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Goo D, Park I, Nam H, Lee Y, Sawall J, Smith AH, Rehberger TG, Li C, Lillehoj HS. Collagen adhesin protein and necrotic enteritis B-like toxin as biomarkers for early diagnosis of necrotic enteritis in commercial broiler chickens. Poult Sci 2023; 102:102647. [PMID: 37060834 PMCID: PMC10139936 DOI: 10.1016/j.psj.2023.102647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/07/2023] [Accepted: 03/08/2023] [Indexed: 03/14/2023] Open
Abstract
Mouse monoclonal antibodies (mAbs) reactive with Clostridium perfringens collagen adhesin protein (CNA) and necrotic enteritis B-like toxin (NetB) were developed. The best capture/detection mAb pairs for CNA and NetB were selected based on their affinity and specificity to develop sandwich enzyme-linked immunosorbent assays (ELISAs) to detect CNA and NetB proteins, respectively, in jejunal digesta samples from commercial broiler farms in the United States. Prior to the analysis of samples from commercial broiler flocks, the specificity and sensitivity of the CNA and NetB ELISAs were validated using sera, jejunal digesta, and fecal samples from chickens coinfected with Eimeria maxima and CNA+/NetB+C. perfringens in an animal model of necrotic enteritis (NE). Subsequently, a total of 251 field samples were collected from 74 commercial poultry farms. Among these, 18 samples were from 6 broiler farms that used certified organics (CO), and 155 samples were from 42 farms with nonantibiotics (NA). In jejunal digesta samples, CNA levels ranged from 0.02 to 0.59 ng/mL and NetB levels ranged from 0.09 to 1.91 ng/mL. CNA and NetB levels showed a positive correlation with each other (Pearson correlation coefficient r = 0.772, P < 0.001). CNA and NetB levels in jejunal digesta were significantly decreased in CO farms compared with those from NA farms (P < 0.001). In conclusion, these new C. perfringens antigen-specific sandwich ELISAs offer a sensitive and specific means to detect C. perfringens CNA and NetB proteins as biomarkers of early NE occurrence in field samples from commercial broiler chickens.
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Affiliation(s)
- D Goo
- Animal Bioscience and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, USDA, Beltsville, MD, USA; Department of Poultry Science, University of Georgia, Athens, GA, USA
| | - I Park
- Animal Bioscience and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, USDA, Beltsville, MD, USA
| | - H Nam
- Animal Bioscience and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, USDA, Beltsville, MD, USA
| | - Y Lee
- Animal Bioscience and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, USDA, Beltsville, MD, USA
| | - J Sawall
- Arm & Hammer Animal and Food Production, Waukesha, WI, USA
| | - A H Smith
- Arm & Hammer Animal and Food Production, Waukesha, WI, USA
| | - T G Rehberger
- Arm & Hammer Animal and Food Production, Waukesha, WI, USA
| | - C Li
- Animal Bioscience and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, USDA, Beltsville, MD, USA
| | - H S Lillehoj
- Animal Bioscience and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, USDA, Beltsville, MD, USA.
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Jeon H, Kim G, Nam H, Suh S. The Function of Bedtime Procrastination in Individuals with Clinical Insomnia. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Kwon J, Hwang J, Nam H, Im CH. Novel hybrid visual stimuli incorporating periodic motions into conventional flickering or pattern-reversal visual stimuli for steady-state visual evoked potential-based brain-computer interfaces. Front Neuroinform 2022; 16:997068. [PMID: 36213545 PMCID: PMC9534124 DOI: 10.3389/fninf.2022.997068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 08/30/2022] [Indexed: 11/13/2022] Open
Abstract
In this study, we proposed a new type of hybrid visual stimuli for steady-state visual evoked potential (SSVEP)-based brain-computer interfaces (BCIs), which incorporate various periodic motions into conventional flickering stimuli (FS) or pattern reversal stimuli (PRS). Furthermore, we investigated optimal periodic motions for each FS and PRS to enhance the performance of SSVEP-based BCIs. Periodic motions were implemented by changing the size of the stimulus according to four different temporal functions denoted by none, square, triangular, and sine, yielding a total of eight hybrid visual stimuli. Additionally, we developed the extended version of filter bank canonical correlation analysis (FBCCA), which is a state-of-the-art training-free classification algorithm for SSVEP-based BCIs, to enhance the classification accuracy for PRS-based hybrid visual stimuli. Twenty healthy individuals participated in the SSVEP-based BCI experiment to discriminate four visual stimuli with different frequencies. An average classification accuracy and information transfer rate (ITR) were evaluated to compare the performances of SSVEP-based BCIs for different hybrid visual stimuli. Additionally, the user's visual fatigue for each of the hybrid visual stimuli was also evaluated. As the result, for FS, the highest performances were reported when the periodic motion of the sine waveform was incorporated for all window sizes except for 3 s. For PRS, the periodic motion of the square waveform showed the highest classification accuracies for all tested window sizes. A significant statistical difference in the performance between the two best stimuli was not observed. The averaged fatigue scores were reported to be 5.3 ± 2.05 and 4.05 ± 1.28 for FS with sine-wave periodic motion and PRS with square-wave periodic motion, respectively. Consequently, our results demonstrated that FS with sine-wave periodic motion and PRS with square-wave periodic motion could effectively improve the BCI performances compared to conventional FS and PRS. In addition, thanks to its low visual fatigue, PRS with square-wave periodic motion can be regarded as the most appropriate visual stimulus for the long-term use of SSVEP-based BCIs, particularly for window sizes equal to or larger than 2 s.
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Affiliation(s)
- Jinuk Kwon
- Department of Biomedical Engineering, Hanyang University, Seoul, South Korea
- Department of Electronic Engineering, Hanyang University, Seoul, South Korea
| | - Jihun Hwang
- Department of Electronic Engineering, Hanyang University, Seoul, South Korea
| | - Hyerin Nam
- Department of Artificial Intelligence, Hanyang University, Seoul, South Korea
| | - Chang-Hwan Im
- Department of Biomedical Engineering, Hanyang University, Seoul, South Korea
- Department of Electronic Engineering, Hanyang University, Seoul, South Korea
- Department of Artificial Intelligence, Hanyang University, Seoul, South Korea
- Department of HY-KIST Bio-Convergence, Hanyang University, Seoul, South Korea
- *Correspondence: Chang-Hwan Im
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Nam H, Kim J, Woo S, Park S, Lee H, Jang H, Park† K, Suh† S. 0971 Mother’s Parenting Style As A Moderator In The Relationship Between Temperament And Sleep Problems In Children With Obesity. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Based on past studies, a child’s temperament and parenting style greatly affect a child’s sleep. However, there are limited studies that have investigated how parenting styles and a child’s temperament interact and affect the child’s sleep in obese children. Thus, this study investigated parenting styles as a moderator in the relationship between temperament and sleep in obese children.
Methods
Seventy-seven obese children (male=66.2%, average BMI = 27.35±2.78) participated in the study. The mean age of the participants was 10.82(± 1.00) years. The primary caregiver (mother) of the participants completed the Junior Temperament and Character Inventory (J-TCI), and Parents as Social Context Questionnaire (K-PSCQ), and Children’s Sleep Habits Questionnaire (CSHQ). Among the different subscales, only Novelty Seeking (NS) and Reward Dependence (RD) were used for analysis among Junior Temperament and Character Inventory (J-TCI) components.
Results
In this sample, 66 children (85.7%) reported significant levels of sleep problems based on the CSHQ. Novelty seeking (NS) and reward dependence (RD) significantly predicted sleep problems (B=-.771, p<.05, B=-.683, p<.01). Additionally, mother’s negative parenting style moderated the relationship between NS and the child’s sleep problem [B=.03, 95% CI=.007, .049] and the relationship between RD and the child’s sleep problem [B=.031, 95% CI=.013, .049]. The more negative mother’s parenting style, the higher the child’s NS or RD scores had a negative effect on sleep.
Conclusion
The results of this study show that obese children experience high levels of sleep disturbance. Additionally, the mother’s negative parenting style moderated the relationship between temperament and sleep problems in obese children. The results suggest that sleep interventions for obese children should include the mother, especially in children with high novelty seeking and reward dependence.
Support
This work was supported by Korea Centers for Disease Control and Prevention & Korea National Research Institute of Health (2019020660E-00)
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Affiliation(s)
- H Nam
- SUNGSHIN WOMEN’S UNIVERSITY, Seoul, KOREA, REPUBLIC OF
| | - J Kim
- SUNGSHIN WOMEN’S UNIVERSITY, Seoul, KOREA, REPUBLIC OF
| | - S Woo
- Department of Medical Science, Hallym University School of Medicine, Chuncheon, KOREA, REPUBLIC OF
| | - S Park
- Center for Biomedical Sciences, Korea National Institute of Health, Cheongju, Chungbuk, KOREA, REPUBLIC OF
| | - H Lee
- Center for Biomedical Sciences, Korea National Institute of Health, Cheongju, Chungbuk, KOREA, REPUBLIC OF
| | - H Jang
- Center for Biomedical Sciences, Korea National Institute of Health, Cheongju, Chungbuk, KOREA, REPUBLIC OF
| | - K Park†
- Department of Family Medicine, Hallym University Sacred Heart Hospital, Hallym University School of Medicine, Anayng, KOREA, REPUBLIC OF
| | - S Suh†
- SUNGSHIN WOMEN’S UNIVERSITY, Seoul, KOREA, REPUBLIC OF
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Lee E, Lee J, Hur M, Park HY, Yum H, Nam H, Oh MY, Choi H, Kim J, Cho B, Lim Y, Won J. MG1124, a novel CEACAM1-targeted monoclonal antibody, has therapeutic potential as a combination partner of PD-1 inhibitors in NSCLC patients. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz253.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Shin C, Lee J, Kim YK, Nam H, Yoon EJ, Shin SA, Kim H, Jeon B. Cognitive decline in association with hyposmia in idiopathic rapid eye movement sleep behavior disorder: a prospective 2‐year follow‐up study. Eur J Neurol 2019; 26:1417-1420. [DOI: 10.1111/ene.14025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 06/18/2019] [Indexed: 11/29/2022]
Affiliation(s)
- C. Shin
- Department of Neurology Kyung Hee University Hospital SeoulKorea
| | - J.‐Y. Lee
- Department of Neurology Seoul National University Boramae Hospital SeoulKorea
| | - Y. K. Kim
- Department of Nuclear Medicine Seoul National University Boramae Hospital SeoulKorea
| | - H. Nam
- Department of Neurology Seoul National University Boramae Hospital SeoulKorea
| | - E. J. Yoon
- Department of Nuclear Medicine Seoul National University Boramae Hospital SeoulKorea
| | - S. A. Shin
- Department of Nuclear Medicine Seoul National University Boramae Hospital SeoulKorea
| | - H.‐J. Kim
- Department of Neurology Seoul National University Hospital Seoul Korea
| | - B. Jeon
- Department of Neurology Seoul National University Hospital Seoul Korea
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Choi C, Kang D, Kim H, Park S, Kim S, Nam H. Clinical outcomes of rectal neuroendocrine tumors less than 20 mm: a single institutional analysis of 371 patients. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz156.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Choi C, Kim S, Kang D, Park S, Nam H. Can an undifferentiated type early gastric cancer be a candidate for endoscopic resection? Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Park HY, Nam H, Kwon H, Yu C, Song S, Oh I, Yang H, Jo EC, Won J, Eun SY. A dual-targeting fusion protein, human PVR-4-1BBL for immunotherapy in AML. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy487.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kang D, Choi C, Kim H, Park S, Kim S, Ryu D, Ko J, Lee J, Lee J, Lee K, Kwon B, Kim H, Nam H. Associated factors with overlooked multiple synchronous gastric epithelial neoplasia. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kim S, Choi C, Kang D, Kim H, Park S, Ryu D, Ko J, Kim H, Kwon B, Lee K, Lee J, Lee J, Nam H. Clinical outcomes of endoscopic submucosal dissection for lesions on the proximal location of the stomach. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kang D, Kim H, Choi C, Park S, Kim S, Nam H, Ryu D, Ko J, Kim H, Kwon B, Lee K, Lee J, Lee J. Long-term clinical outcomes in large colorectal polyps with indefinite or positive resection margin after endoscopic resection. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Koo D, Lee J, Nam H. Sleep problems in patients with synucleinopathy and REM sleep behavior disorder. Sleep Med 2017. [DOI: 10.1016/j.sleep.2017.11.494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nam H, Kim C, Kim D, Lim J, Jeon S, Kim J, Lee Y, Cho J, Ryu J. P2.01-016 Prognostic Impact of a New Score Using Neutrophil-To-Lymphocyte Ratios in the Serum and Malignant Pleural Effusion in Lung Cancer Patients. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lee S, Nam H, Lee Y. Cariporide Enhances DNA Damage and Apoptosis of Malignant Mesothelioma Cells Preadapted to Acidic Environment. Clin Ther 2017. [DOI: 10.1016/j.clinthera.2017.05.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Jeong MK, Hwang C, Nam H, Cho YS, Kang BY, Cho EC. Effect of the gel elasticity of model skin matrices on the distance/depth-dependent transmission of vibration energy supplied from a cosmetic vibrator. Int J Cosmet Sci 2016; 39:42-48. [PMID: 27264842 DOI: 10.1111/ics.12346] [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: 03/21/2016] [Accepted: 06/02/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The purpose of this study was to determine how the energies supplied from a cosmetic vibrator are deeply or far transferred into organs and tissues, and how these depths or distances are influenced by tissue elasticity. METHODS External vibration energy was applied to model skin surfaces through a facial cleansing vibrator, and we measured a distance- and depth-dependent energy that was transferred to model skin matrices. As model skin matrices, we synthesized hard and soft poly(dimethylsiloxane) (PDMS) gels, as well as hydrogels with a modulus of 2.63 MPa, 0.33 MPa and 21 kPa, respectively, mostly representing those of skin and other organs. The transfer of vibration energy was measured either by increasing the separation distances or by increasing the depth from the vibrator. RESULTS The energies were transmitted deeper into the hard PDMS than into the soft PDMS and hydrogel matrices. This finding implies that the vibration forces influence a larger area of the gel matrices when the gels are more elastic (or rigid). There were no appreciable differences between the soft PDMS and hydrogel matrices. However, the absorbed energies were more concentrated in the area closest to the vibrator with decreasing elasticity of the matrix. Softer materials absorbed most of the supplied energy around the point of the vibrator. In contrast, harder materials scattered the external energy over a broad area. CONCLUSIONS The current results are the first report in estimating how the external energy is deeply or distantly transferred into a model skins depending on the elastic moduli of the models skins. In doing so, the results would be potentially useful in predicting the health of cells, tissues and organs exposed to various stimuli.
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Affiliation(s)
- M K Jeong
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, South Korea
| | - C Hwang
- Amorepacific Corporation R&D Center, Yonggu-daero, Yongin, 446-729, South Korea
| | - H Nam
- Amorepacific Corporation R&D Center, Yonggu-daero, Yongin, 446-729, South Korea
| | - Y S Cho
- Amorepacific Corporation R&D Center, Yonggu-daero, Yongin, 446-729, South Korea
| | - B Y Kang
- Amorepacific Corporation R&D Center, Yonggu-daero, Yongin, 446-729, South Korea
| | - E C Cho
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, South Korea
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Nam H, Galen K, Campara M, Perni N, Garcia-Roca R, Yeldandi V. Significance of preservation fluid cultures in solid organ transplantation. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Nam H, Kerman IA. Distribution of catecholaminergic presympathetic-premotor neurons in the rat lower brainstem. Neuroscience 2016; 324:430-45. [PMID: 26946268 DOI: 10.1016/j.neuroscience.2016.02.066] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 11/21/2015] [Revised: 02/11/2016] [Accepted: 02/26/2016] [Indexed: 11/15/2022]
Abstract
We previously characterized the organization of presympathetic-premotor neurons (PSPMNs), which send descending poly-synaptic projections with collaterals to skeletal muscle and the adrenal gland. Such neurons may play a role in shaping integrated adaptive responses, and many of them were found within well-characterized regions of noradrenergic cell populations suggesting that some of the PSPMNs are catecholaminergic. To address this issue, we used retrograde trans-synaptic tract-tracing with attenuated pseudorabies virus (PRV) recombinants combined with multi-label immunofluorescence to identify PSPMNs expressing tyrosine hydroxylase (TH). Our findings indicate that TH-immunoreactive (ir) PSPMNs are present throughout the brainstem within multiple cell populations, including the A1, C1, C2, C3, A5 and A7 cell groups along with the locus coeruleus (LC) and the nucleus subcoeruleus (SubC). The largest numbers of TH-ir PSPMNs were located within the LC and SubC. Within SubC and the A7 cell group, about 70% of TH-ir neurons were PSPMNs, which was a significantly greater fraction of neurons than in the other brain regions we examined. These findings indicate that TH-ir neurons near the pontomesencephalic junction that are distributed across the LC, SubC, and the A7 may play a prominent role in somatomotor-sympathetic integration, and that the major functional role of the A7 and SubC noradrenergic cell groups maybe in the coordination of concomitant activation of somatomotor and sympathetic outflows. These neurons may participate in mediating homeostatic adaptations that require simultaneous activation of sympathetic and somatomotor nerves in the periphery.
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Affiliation(s)
- H Nam
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, Birmingham, AL, United States; Cell Molecular and Developmental Biology Theme, Graduate Biomedical Sciences Program, University of Alabama at Birmingham, Birmingham, AL, United States
| | - I A Kerman
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, Birmingham, AL, United States.
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Koo D, Nam H. Association between obstructive sleep apnea syndrome and cerebral microbleeds in patients with ischemic stroke. Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Min S, Nam H, Kwon D, Hwang S, Kim M. Correlation of maxillo-mandibular skeletal changes and change of lip canting in two jaw orthognathic surgery for correction of facial asymmetry. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hue N, Nam H, Tung N. A Preliminary Investigation of Pentachlorobenzene Amount Created from Municipal Waste Incinerators and Industrial Furnaces at Some Provinces in Northern Vietnam. ACTA ACUST UNITED AC 2015. [DOI: 10.14233/ajchem.2015.18726] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kim HS, Park YH, Nam H, Lee YM, Song K, Choi C, Ahn I, Park SR, Lee YH, Hwang DJ. Overexpression of the Brassica rapa transcription factor WRKY12 results in reduced soft rot symptoms caused by Pectobacterium carotovorum in Arabidopsis and Chinese cabbage. Plant Biol (Stuttg) 2014; 16:973-981. [PMID: 24552622 DOI: 10.1111/plb.12149] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 12/03/2013] [Indexed: 06/03/2023]
Abstract
Chinese cabbage (Brassica rapa L. ssp. pekinensis), an important vegetable crop, can succumb to diseases such as bacterial soft rot, resulting in significant loss of crop productivity and quality. Pectobacterium carotovorum ssp. carotovorum (Pcc) causes soft rot disease in various plants, including Chinese cabbage. To overcome crop loss caused by bacterial soft rot, a gene from Chinese cabbage was isolated and characterised in this study. We isolated the BrWRKY12 gene from Chinese cabbage, which is a group II member of the WRKY transcription factor superfamily. The 645-bp coding sequence of BrWRKY12 translates to a protein with a molecular mass of approximately 24.4 kDa, and BrWRKY12 was exclusively localised in the nucleus. Transcripts of BrWRKY12 were induced by Pcc infection in Brassica. Heterologous expression of BrWRKY12 resulted in reduced susceptibility to Pcc but not to Pseudomonas syringae pv. tomato in Arabidopsis. Defence-associated genes, such as AtPDF1.2 and AtPGIP2, were constitutively expressed in transgenic lines overexpressing BrWRKY12. The expression of AtWKRY12, which is the closest orthologue of BrWRKY12, was down-regulated by Pcc in Arabidopsis. However, the Atwrky12-2 mutants did not show any difference in response to Pcc, pointing to a difference in function of WRKY12 in Brassica and Arabidopsis. Furthermore, BrWRKY12 in Chinese cabbage also exhibited enhanced resistance to bacterial soft rot and increased the expression of defence-associated genes. In summary, BrWRKY12 confers enhanced resistance to Pcc through transcriptional activation of defence-related genes.
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Affiliation(s)
- H S Kim
- National Academy of Agricultural Science, Rural Development Administration, Suwon, South Korea
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Guo M, Nam H, Li R, Xing L, Gao H. TH-E-17A-02: High-Pitch and Sparse-View Helical 4D CT Via Iterative Image Reconstruction Method Based On Tensor Framelet. Med Phys 2014. [DOI: 10.1118/1.4889677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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25
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Nam H, Guo M, Lee K, Li R, Xing L, Gao H. SU-E-I-93: Improved Imaging Quality for Multislice Helical CT Via Sparsity Regularized Iterative Image Reconstruction Method Based On Tensor Framelet. Med Phys 2014. [DOI: 10.1118/1.4888043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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26
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Kim J, Nam H, An S, Oh Y, Ji Y, Lee R. SU-E-I-62: A New Metal Artifact Reduction Algorithm Using Edge Preserving Smoothing Filter. Med Phys 2013. [DOI: 10.1118/1.4814172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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27
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Kim J, Nam H, Park S, Wu H, Ye S. Assessment of Tracking Jaws Based on MLC Aperture to Reduce Normal Tissue Irradiation in VMAT. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.2313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Park SJ, Shon OJ, Rim JA, Lee JK, Kim JS, Nam H, Kim H. Calixazacrown ethers for copper(II) ion-selective electrode. Talanta 2012; 55:297-304. [PMID: 18968373 DOI: 10.1016/s0039-9140(01)00420-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2001] [Revised: 04/19/2001] [Accepted: 04/23/2001] [Indexed: 11/18/2022]
Abstract
Five novel 1,3-alternate calix[4]azacrown ethers having 2-picolyl, 3-picolyl, and benzyl unit on the nitrogen atom were synthesized and used as ionophores for transition metal-selective polymeric membrane electrodes. The electrode based on 2-picolyl armed 1,3-alternate calix [4] azacrown ether exhibited Nernstian response toward copper (II) ion over a concentration range (10(-4.5) M-10(-2.5) M). The detection limit was determined as 10(-5) M in pH 7 and the selectivity coefficients for possible interfering cations were evaluated. Anions in the sample solution strongly affected the electrode response.
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Affiliation(s)
- S J Park
- School of Chemistry and Molecular Engineering, Center for Molecular Catalysis, Seoul National University, Seoul 151-742, South Korea
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Maris P, Vary JP, Navrátil P, Ormand WE, Nam H, Dean DJ. Origin of the anomalous long lifetime of ¹⁴C. Phys Rev Lett 2011; 106:202502. [PMID: 21668224 DOI: 10.1103/physrevlett.106.202502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Indexed: 05/30/2023]
Abstract
We report the microscopic origins of the anomalously suppressed beta decay of ¹⁴C to ¹⁴N using the ab initio no-core shell model with the Hamiltonian from the chiral effective field theory including three-nucleon force terms. The three-nucleon force induces unexpectedly large cancellations within the p shell between contributions to beta decay, which reduce the traditionally large contributions from the nucleon-nucleon interactions by an order of magnitude, leading to the long lifetime of ¹⁴C.
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Affiliation(s)
- P Maris
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011-3160, USA
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Ryu JS, Choi C, Yang S, Nam H, Kim H, Lee MH. Development of prognostic biomarker in pathologic stage I NSCLC patients: Protein expressions involving in DNA damage response. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.7578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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31
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Dean DJ, Langanke K, Nam H, Nazarewicz W. Pairing reentrance phenomenon in heated rotating nuclei in the shell-model Monte Carlo approach. Phys Rev Lett 2010; 105:212504. [PMID: 21231296 DOI: 10.1103/physrevlett.105.212504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2009] [Revised: 09/21/2010] [Indexed: 05/30/2023]
Abstract
Rotational motion of heated 72Ge is studied within the microscopic shell-model Monte Carlo approach. We investigate the angular momentum alignment and nuclear pairing correlations associated with J^{π} Cooper pairs as a function of the rotational frequency and temperature. The reentrance of pairing correlations with temperature is predicted at high rotational frequencies. It manifests itself through the anomalous behavior of specific heat and level density.
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Affiliation(s)
- D J Dean
- Physics Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831, USA
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Nam H, Huh S, Ju S, Choi J, Kim B. PET/CT Guided Brachytherapy Planning for Cervical Cancer. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lee J, Choi D, Huh S, Park W, Nam H, Yang J, Nam S, Lee J. Omitting Postoperative Radiation after Excision for Ductal Carcinoma In Situ of the Breast. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Nam H, Huh SJ, Park W, Bae DS, Kim BG, Lee JH, Kim CK, Park BK. Prognostic significance of MRI-detected bladder muscle and/or serosal invasion in patients with cervical cancer treated with radiotherapy. Br J Radiol 2010. [DOI: 10.1259/bjr/6646798] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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35
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Nam H, Huh SJ, Park W, Bae DS, Kim BG, Lee JH, Kim CK, Park BK. Prognostic significance of MRI-detected bladder muscle and/or serosal invasion in patients with cervical cancer treated with radiotherapy. Br J Radiol 2010; 83:868-73. [PMID: 20846984 DOI: 10.1259/bjr/66646798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In cervical cancer, the prognostic significance of bladder wall invasion on MRI without pathological evidence of mucosal invasion is not known. From 454 consecutive patients with cervical cancer who were treated with radiation, we reviewed images and analysed the outcome of 92 patients with the Federation of International Gynecology and Obstetrics (FIGO) stage IIIB-IVA. We analysed the patients in three groups, normal, wall (muscle and/or serosal) invasion and mucosal invasion, according to the findings on the MRI. Kaplan-Meier life table analysis and the log-rank test were used to assess the survival rates and differences according to prognostic factors. MRI detected abnormalities in the bladder wall in 42 patients (45.6%): wall invasion in 24 and mucosal invasion in 18. 5 of 18 patients, suspected on MRI to have mucosal invasion, showed no pathological evidence of mucosal invasion. Median follow-up period was 34 months. 3-year cause-specific survival (CSS) in the normal group compared with the wall invasion group was 76.2% vs 71.4% (p = 0.48). 3-year CSS for the wall invasion group compared with the mucosal invasion group was 71.4% vs 54.3% (p = 0.04). Mucosal invasion on MRI (p = 0.03) and concurrent chemoradiotherapy (p = 0.01) was significant for CSS. The prognosis for patients with cervical cancer with evidence of muscle and/or serosal invasion of the bladder on MRI may not differ from that for patients without abnormality on MRI. In patients with the MRI finding of bladder mucosal invasion, further studies should be conducted regarding the role of cystoscopy to determine the need for pathological confirmation.
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Affiliation(s)
- H Nam
- Department of Radiation Oncology, Samsung Medical Centre, Sungkyunkwan University School of Medicine, 135-710, Irwon-dong 50, Gangnam-gu, Seoul, South Korea
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Nam H, Huh S, Lee J. Prognostic Significance of MRI-detected Bladder Muscle and/or Serosal Invasion in Cervical Cancer Patients Treated with Radiotherapy. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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37
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Lee J, Huh S, Nam H, Ju S, Choi J, Kim B. 8050 Usefulness of FDG-PET/CT guided brachytherapy planning in patients with uterine cervical cancer. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71572-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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38
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Park D, Nam H, Jung T, Jung H, Lee S, Kim D. 69. Clinical, biochemical and electrophysiological study in chronic alcoholism. Clin Neurophysiol 2009. [DOI: 10.1016/j.clinph.2008.10.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Park D, Nam H, Kim J, Jeong J, Lee S. 65. Lumbrical and interosseus recording of 700 hands with carpal tunnel syndrome. Clin Neurophysiol 2008. [DOI: 10.1016/j.clinph.2007.11.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Current practice in MRI trends towards higher static magnetic field (B/sub 0/) because of the advantage of signal-to-noise ratio (SNR). However at high magnetic fields, the interaction between a coil and a load becomes significant, thus making current distribution on RF coils disturbed and causing transverse magnetic (B/sub 1/) field inhomogeneity. A novel approach to optimize B/sub 1/, field homogeneity is to use a transmit phased array and adjust the amplitudes and phases of the currents on each element independently. However, independent control is difficult to achieve in conventional arrays due to coupling between elements. In addition, the currents are generally load dependent. In this paper we show that a RF current source is an effective method for controlling the current on each element of the transmit phased array, and that the RF current source is much less sensitive to loading and a interelement coupling than a conventional 50Omega matched coil.
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Affiliation(s)
- H Nam
- Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
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Oh D, Lim D, Heo J, Choi S, Choi D, Nam H, Ahn Y, Park W, Huh S. 2157. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kang M, Park W, Choi Y, Nam H, Huh S, Ahn Y, Lim D, Park Y, Oh D. 2345. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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45
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Ahn Y, Nam H, Kim Y, Oh D, Ko Y. 2531. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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46
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Nam H, Lim D, Kim S, Sohn T, Noh J, Heo J, Kang W, Park C, Ahn Y, Huh S. 1073. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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47
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Noh J, Park W, Ahn Y, Nam H, Oh D, Chun H, Lee W, Yun S, Kang W, Park Y. 2180. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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48
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Kim B, Ahn Y, Park W, Park Y, Nam H, Yoon S, Kang W, Chon H. Results of Adjuvant Combined Modality Treatment for Rectal Cancer Patients with Synchronous Liver Metastasis Following Synchronous Rectal and Hepatic Resection. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Ahn Y, Kim K, Nam H, Oh D, Park Y, Lim D, Han J, Park J, Kim J, Kim K. P-190 Prognostic factors of N2 positive stage IIIA non-small cell lung cancer treated with preoperative concurrent radiochemotherapy and surgery. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80684-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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50
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Ahn Y, Kim B, Lim D, Nam H, Oh D, Park Y. P-601 High dose radiation therapy with 3 Gy per fraction in medicallyinoperable high dose radiation therapy with 3 Gy per fraction in medically inoperable stage I/II non-small cell lung cancer. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)81094-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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