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장재훈,구본화,홍우영,김인익,고한석,Jang, Jae-Hoon,Ku, Bon-Hwa,Hong, Woo-Young,Kim, In-Ik,Ko, Han-Seok 한국군사과학기술학회 2006 한국군사과학기술학회지 Vol.9 No.1
This paper is to analyze the effectiveness of multistatic sonar network based on detection performance. The multistatic sonar network is a distributed detection system that places a source and multi-receivers apart. So it needs a detection technique that relates to decision rule and optimization of sonar system to improve the detection performance. For this we propose a data fusion procedure using Bayesian decision and optimal sensor arrangement by optimizing a bistatic sonar. Also, to analyze the detection performance effectively, we propose the environmental model that simulates a propagation loss and target strength suitable for multistatic sonar networks in real surroundings. The effectiveness analysis on the multistatic sonar network confirms itself as a promising tool for effective allocation of detection resources in multistatic sonar system.
수술자가 시행하는 수술 전 갑상선 초음파 검사의 유용성
장재훈,최재영<SUP>1<.SUP>,박원서,송정윤,고석환,Jae Hoon Jang,M.D.,Jae Young Choi,M.D.,Ph.D.<SUP>1<.SUP>,Won Seo Park,M.D.,Jeong Yoon Song,M.D.,Ph.D. and Suck Hwan Koh,M.D.,Ph.D. 대한갑상선-내분비외과학회 2008 The Koreran journal of Endocrine Surgery Vol.8 No.1
<B>Purpose: </B>Although the diagnostic accuracy of thyroid cancer by fine needle aspiration cytology (FNAC) is increasing, there are some nodules for which ultrasonography and FNAC show indeterminant. The purpose of this study was to determine the usefulness of thyroid ultrasonography by the surgeon prior to operation <B>Methods:</B> Forty-nine patients who underwent thyroid operations between June 2006 and January 2007 were selected for this study. Thyroid ultrasonography was performed on each patient.And we recorded and analyzed the shape and the margin of the nodule, internal echogeneiety, heterogeneiety, the presence of microcalcification, height versus width, and the presence of level VI lymph node larger than 3 mm, assigning each a score of 1, 2 or 3. <B>Results: </B>The average score was 17.1. Assuming an average score over 14 is considered to be malignant, the sensitivity, specificity, positive predictive value, and negative predictive value were 95.6%, 88.9%, 91.7%, 94.1% respec</B>tively. Statistically significant characteristics of malignancy were the shape and the margin of the nodule, internal echogeneiety, microcalcification, taller than wide shape and the presence of enlarged VI lymph nodes. The heterogeneiety had no significant P value. <B>Conclusion: </B>When malignancy cannot be confirmed even after repeated FNAC, preoperative ultrasonograpy performed by surgeons can be a reliable test and helpful for operations. <B>(Ko</B><B>rean J Endocrine Surg 2008;8:28-32)</B>
좌측 변형 경부 곽청술 후에 흉관손상 없이 발생한 양측성 유미흉 1예
장재훈,최재영,송정윤,박호철,고석환,Jae Hoon Jang,M,D,Jae Young Choi,M,D,Jeong Yoon Song,M,D,Ho Chul Park,M,D,and Suck Hwan Koh,M,D 대한갑상선-내분비외과학회 2006 The Koreran journal of Endocrine Surgery Vol.6 No.1
Bilateral chylothorax as a complication of modified radical neck dissection is extremely rare, but it is potentially serious and sometimes fatal. Early diagnosis and proper management is very important. We report here on a case of bilateral chylothorax following left modified radical neck dissection that was successfully treated with conservative management. (Korean J Endocrine Surg 2006;6:32-34)
지구성 운동 강도 차이가 흰쥐의 체중 및 비만지표에 미치는 영향
장재훈(Jae Hoon Jang) 한국체육교육학회 2009 한국체육교육학회지 Vol.14 No.2
The purpose of this study was to effects of the endurance exercise intensity on the Body weight and obesity index in rats. 84 male white rat of Sprague-Dawley(6 week of age) were divided into the three group; control group(COG; n=28), low intensity(20m/min) trained group(LTG; n=28), and high intensity(28m/min) trained group(HTG; n=28). The adaptation training to the environment and the adaptation training to the treadmill running were performed for one week, with the exercise program 5 times/week during 12 week. Following are the results of the research. The Body weight and food efficiency ratio were significant differences between exercise group and control group in 8 weeks and 12 weeks. There were significant differences on obesity index and fat mass change of control group, low intensity exercise group and high intensity exercise group in 4 weeks and 8 weeks, and significant difference between exercise group and control group in 12 weeks. Also, adipose tissue size and number were significant differences between exercise group and control group in 12 weeks. In conclusion, regular endurance exercise of 12 weeks have a meaningful influence on Body weight loss and obesity index but the different intensity of the exercise seemed to have no significant differences. It is suggested that when consider exercise program for obese person, there should be enough time for increase of energy consumption than exercise intensity.
Small-Sided Game 훈련이 축구학과 학생들의 유·무산소성 능력과 경기 중 운동강도에 미치는 영향
장재훈(Jang, Jae-Hoon) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.5
The purpose of the study was to examine the effects of SSG on aerobic and anaerobic capacities and exercise intensity during games in college students. Thirty-two college students majoring in football-related subjects participated in an 8-week study, and they were randomly assigned to either group one playing 8vs.8 game(n=16) or group two playing 4vs.4 game(n=16). The assessments included aerobic and anaerobic capacities, running distances during games, and exercise intensity before and after 8 weeks of each training. Results show that both groups significantly improved VO2max and total distances covered. For anaerobic capacities, while both groups showed significant improvements in average metabolic power, the group played 4vs.4 games showed a statistically significant increase in maximal metabolic power(p<.001). For the running outputs during the SSG, both groups showed similar improvements in jogging(p<.001), while the group played 8vs.8 games improved walking capacity (p<.05). Both groups showed significant changes in sprinting(p<.001), only the group playde 4vs.4 games improved distances covered while running(p<.05), high-intensity running(p<.001), and high-speed running(p<.001). Results indicated that the SSG training improved total distance coverde, anerobic and anaerobic capacities, and exercise intensity during games of college students. As the group played 4vs.4 games performed significantly better in high-intensity and speed running, compared to the other group, a small number of players of smaller pitches appear to influence the SSG trainging.