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( Sang Gook Seo ),( Se Hwan Park ),( Jin-hwan Yoon ),( Byeong-wan Kim ),( Hyunseok Jee ) 한국운동생리학회(구 한국운동과학회) 2020 운동과학 Vol.29 No.2
PURPOSE: The purpose of this study was to investigate the effects of 5 weeks of basic military training on the physical fitness and blood biochemical factors in obese military recruits. METHODS: Forty-eight male recruits (20-25 years of age) were randomly assigned to the Control group and Exercise group. Both groups completed 5 weeks of basic military training. The Exercise group additionally performed a resistance exercise twice daily in the morning and afternoon (1-3 sets, 3 days per week) and power walking (60-80% HRmax, 30 minutes) four times weekly. Four body composition variables, physical fitness factors, serum lipid profiles, and obesity-related hormone levels were analyzed. RESULTS: Body weight, body fat ratio, body mass index, and waist circumference were significantly decreased in both groups between pre- and post-exercise tests (p<.01). However, no changes in these parameters were observed between the Control and Exercise groups. Twenty-meter shuttle running and maximal oxygen uptake were significantly increased post exercise (p<.001). Total cholesterol, triglyceride, and low-density lipoprotein levels were significantly decreased in both (Control and Exercise) post-exercise tests (p<.05). Leptin in both groups was significantly decreased; however, ghrelin showed a reverse pattern (p<.01). A significantly changed maximal oxygen uptake value via training was noted in both groups (p<.001). The time and interaction between the groups and the time were also significantly affected (p<.001). CONCLUSIONS: Our findings suggest that an additional exercise-training program with the basic military training plays an important role in improving military fitness and combat power.
Yoon, Byeong-Sung,Kwun, Hyok-Oun,Shin, Sang-Eun,Jin, Cheng-Wu,Yu, Chang-Yeon,Cho, Dong-Ha The Korean Society of Medicinal Crop Science 2003 韓國藥用作物學會誌 Vol.11 No.4
This study was conducted to classify photosynthesis rate and changes of rutin content of Korean buckwheat (cv. Chunchon-jaerae and Yangjeul-memil) treated with salinity, UV-C and low temperature. In case of cv. Chunchon-jaerae and Yangjeul-memil, according to the salt stress, transpiration rate, stomatal conductance and photosynthesis rate were decreased. Both cultivars also showed decrease of transpiration rate and photosynthesis rate under the UV-C. Rutin contents within leaf and stem of cv. Yangjeul-memil were decreased when NaCl concentration was high. Rutin contents within leaf and stem of cv. Yangjeul-memil were generally decreased when the time laps under the UV-C stress. Rutin contents within leaf and stem of cv. Chunchon-jaerae was also generally decreased when the time laps under the low temperature stress.
Effect of radiation scattering on dose uniformity in open and closed cell culture vessels
Yoon, Myonggeun,Park, Sung Yong,Shin, Jungwook,Kwak, Jungwon,Park, Junghun,Shin, Dongho,Park, Soah,Lee, Se Byeong,Lee, Doo Hyun,Shin, Kyung Hwan,Pyo, Hong Ryull,Kim, Joo-Young,Cho, Kwan Ho Informa Healthcare 2007 International Journal of Radiation Biology Vol.83 No.8
<P> Purpose: Dose uniformity in cell culture vessels such as Petri dishes and anoxic irradiation chambers is very important in radiobiological work as dose uniformity affects cell survival probabilities. In this study, we investigated X-ray dose inhomogeneity, caused by scattering, in typical culture vessels. Materials and methods: Three different cubic cell culture vessels, with side lengths of 10 cm, 15 cm and 20 cm, were designed and irradiated by X-rays of 6 MV and 15 MV at a source-to-surface distance (SSD) of 100 cm using a Varian 2100CD linear accelerator. Results: The relative X-ray dose distribution in a cell culture vessel depended strongly on whether the vessel had a lid. The percentage of the cell culture surface with the dose differing by more than 10% from the mean value of the dose was 43.4% in lidless vessels and 9.7% in lidded vessels. Conclusions: In radiobiological work, X-ray dose inhomogeneity within a cell culture vessel is not negligible and the placement of cells in the vessel should be carefully considered.</P>
Yoon, Jin-Hwan,Kim, Kwang-Woo,Kim, Je-Han,Heo, Kyu-Young,Jin, Kyeong-Sik,Jin, Sang-Woo,Shin, Tae-Joo,Lee, Byeong-Du,Rho, Ye-Cheol,Ahn, Byung-Cheol,Ree, Moon-Hor The Polymer Society of Korea 2008 Macromolecular Research Vol.16 No.7
There are two beamlines (BLs), 4C1 and 4C2, at the Pohang Accelerator Laboratory that are dedicated to small angle X-ray scattering (SAXS). The 4C1 BL was constructed in early 2000 and is open to public users, including both domestic and foreign researchers. In 2003, construction of the second SAXS BL, 4C2, was complete and commissioning and user support were started. The 4C2 BL uses the same bending magnet as its light source as the 4C1 BL. The 4C1 BL uses a synthetic double multilayer monochromator, whereas the 4C2 BL uses a Si(111) double crystal monochromator for both small angle and wide angle X-ray scattering. In the 4C2 BL, the collimating mirror is positioned behind the monochromator in order to enhance the beam flux and energy resolution. A toroidal focusing mirror is positioned in front of the monochromator to increase the beam flux and eliminate higher harmonics. The 4C2 BL also contains a digital cooled charge coupled detector, which has a wide dynamic range and good sensitivity to weak scattering, thereby making it suitable for a range of SAXS and wide angle X-ray scattering experiments. The general performance of the 4C2 BL was initially tested using standard samples and further confirmed by the experience of users during three years of operation. In addition, several grazing incidence X-ray scattering measurements were carried out at the 4C2 BL.
A 32-BIT LOW POWER RISC CORE FOR EMBEDDED APPLICATIONS
Byeong Yoon, Choi,Lee, Moon Key,Kwak, Sung Ho,Lee, Seung Ho THE RESEARCH INSTITUTE OF ASIC DESIGN YONSEI UNIVE 1996 Journal of the Research Institute of ASIC Design Vol.3 No.1
This paper describes microprocessor that has been designed for embedded and portable application. This RISC processor offers very low power consumption and fast context switching. This architecture is based on RISC principles. The processor adopts 3-stage instruction execution using a 2-phase 40MHz clock. This results in a high instruction throughput and real-time interrupt response. This chip is implemented with 0.6㎛ triple metal CMOS technology and consists of about 70K transistors. The power dissipation is 140mW.