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태권도 행정의 현황과 문제점 분석을 통한 행정 효율화 방안
전정우 한국체육과학회 2006 한국체육과학회지 Vol.15 No.2
This study played a purpose of study to present a plan for efficiency of Taekwondo administration through literature study and reward investigation etc.There is Kukkiwon, Korea Taekwondo Association and the World Taekwondo Federation have an organization carrying out Taekwondo administration.Do some overlapping function, and three these organizations are carrying each separate functional role and authority and duty of basically each different character.The Kukkiwon is a mental basis of Taekwondo that is working to total a head of Korean Taekwondo.Be the first administrative organizations, and Korea Taekwondo Association has character as a match group related to Taekwondo.The World Taekwondo Federation is an international organization of Taekwondo.But, the administrative problem of a Taekwondo total the administrative device which can collect enough an opinion of general Taekwondo people was not to each organizations.Therefore, have to add rationally democracy anger about administration currently-oriented efficiency in Taekwondo administration in order to solve a problem.Specially, allow a space participating in on the decision making process, and must introduce a democracy sincerity principle about substratum Taekwondo people about the executives.
A Double-bent Planar Leaf Flexure Guide for a Nano-scanner: Experimental Report
전정우,김종문,Young-Hyoung Lee,이동연 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.9
We describe an experimental study on the double-bent leaf flexure-guided nano-scanner introducedin a previous paper [J. Korean Phy. Soc. 57, 1581 (2010)]. The optimally-designed nanoscannerwas fabricated. Its performances were verified using a finite element analysis (FEA). Thenano-scanner is actuated by a voice coil motor. Its characteristics were measured with a laserinterferometer. The first resonant frequency is calculated as 17.1 Hz. The performances of thenano-scanner, including sine tracking capability, a multi-step response, and range of travel checkwere evaluated using various experimental procedures. Test results reveal that the scanner traveledover a 4.0 mm range and had good nano-precision (4 nm).
全廷祐 慶熙大學校 體育科學大學 1991 體育科學論叢 Vol.- No.4
The purpose of this study wae to examine the existing problems and essential factors in every areas for the vitaligation of Taekwondo. The vitaligation of Taekwondo requires all Taekwondo leaders to build the historical theoretical basis of Taekwondo. Under the basis the new educational program should be developed and applied to Taekwondo trainee. The facilities and mnanagemental system should be also reevaluated and provided.
Effect of Silk Fibroin Hydrolysate on the Apoptosis of MCF-7 human Breast Cancer Cells
전정우,조유영,이광길,이회삼,여주홍,권해용 한국잠사학회 2013 International Journal of Industrial Entomology Vol.27 No.2
Breast cancer is one of the most common cancers among women worldwide. Recentlyanticancer agents have been developed using natural substances. To evaluate the anticancereffect of hydrolysates of silk fibroin (HSF), we investigated the effect of HSF on cell viability andapoptosis of a breast cancer cell line, MCF-7, induced through the mitochondrial pathway. Theresult showed that HSF decreased cell viability in MCF-7 cells in a dose- and time-dependentmanner, resulting in an increase in the sub-G1 phase cell population. HSF increased the levelof the pro-apoptotic Bax protein and decreased the levels of the anti-apoptotic Bcl-2 protein. Inaddition, HSF induced apoptosis in MCF-7 cells through a mitochondria-dependent pathwayby increasing levels of cytochtome c, and cleavage of PARP. Taken together, these findingssuggest that HSF inhibits the proliferation of MCF-7 breast cancer cells through a mitochondriaand caspase dependent apoptotic pathway.
전정우 한국체육과학회 2007 한국체육과학회지 Vol.16 No.2
Due to tons of pressure to survive in the highly competitive society, Korean teenagers have less and less opportunities to participate in physical activities such as sound recreations and sports. In this critical situation, this study attempted to examine the mechanism and/or patterns of teenagers' physical activity consumption culture through the identification of its current state. To accomplish such the purpose of study, this study employed a qualitative research approach. Specifically, the participants of study contained a total of 20 high school students who were sampled with a stratified cluster purpose method. They were in-depth group interviewed with semi-structured research instruments. The qualitative data were analyzed through NUDIST*Vivo program that automatically changes such collected data into a type of quantitative data set such as frequency. Accordingly, the following findings were derived from this study. First, the major playing culture of teenagers were categorized into three patterns including rest/dispersion, spectating/convergence, and activity/devotion. Second, the major spaces for the teenagers' playing culture included arcade rooms, PC rooms, billiard halls, comic rooms, theaters, singing rooms, rock cafes, night clubs. Third, the major types of playing culture that were mostly perceived by teenagers comprised dance culture, drinking culture, singing culture, computer culture, sport culture, eating culture, tea culture and movie going culture. In conclusion, the aforementioned patterns of teenagers' consumption culture accrued to such controversial issues as follows. Most of their activities were relative to wasting time, conducting in sealed spaces, formating self centered playing culture, lack of family typed playing culture, lack of traditional playing culture, and aggressive expression of sensory preferences.
Diagnostic Criteria of Internal Jugular Phlebectasia in Korean Children
전정우,추무진,배일훈,신시옥,최영석,이동욱,심규화 연세대학교의과대학 2002 Yonsei medical journal Vol.43 No.3
Internal jugular phlebectasia (IJP) is a fusiform dilatation of the internal jugular vein (IJV), usually presented as a neck mass in children. Accurate diagnosis from carefully directed history, physical examination, and radiological study could result in lifesaving therapy. We performed our study to suggest possible clinical diagnostic criteria for IJP in Korean children. We reviewed three cases of IJP (patients group) and compared the diameter of the internal jugular phlebectasias with diameters of IJVs in ten normal children (control group) using ultrasonography (USG). There were no significant differences in the range of diameters in the resting state between the two groups. The diameters on the right side, compared with those on the left side, showed no statistical significance (p>0.05). The range of expanding diameter and average expanding ratios (resting state to Valsalva maneuver × 100%) showed a statistical difference between the two groups (p<0.05).