표적탐지성능을 이용한 다중상태 소나의 효과도 분석

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)

흰쥐에서 운동강도에 따른 혈중 렙틴과 비만도 및 생화학적 지표들과의 상관성

장재훈 ( Jae Hoon Jang ),허선 ( Sun Hur ) 한국운동영양학회 2006 Physical Activity and Nutrition (Phys Act Nutr) Vol.10 No.1

ZnO/nip-SiC:H/금속기판 구조 비정질 실리콘 태양전지의 후면 ZnO 및 완충충 삽입 효과에 대한 컴퓨터 수치해석

장재훈(Jae Hoon Jang),임굉수(Koeng Su Lim) 대한전기학회 1994 대한전기학회 학술대회 논문집 Vol.1994 No.7

대퇴골 전자간 골절 환자에서 TRIGEN(TM) INTERTAN Nail (InterTAN)과 제2형 항회전 근위 대퇴골수정(PFNA2)의 수술적 결과 비교

장재훈 ( Jae Hoon Jang ),김정일 ( Jeung Il Kim ),김엄지 ( Um Ji Kim ),문남훈 ( Nam Hoon Moon ) 대한골절학회 2016 대한골절학회지 Vol.29 No.2

목 적: 본 연구는 대퇴골 전자간 골절 환자를 대상으로 TRIGENTM INTERTAN nail (InterTAN)이 제2형 항회전 근위 대퇴골수정(proximal femoral nail antirotation 2, PFNA2)에 비해 우수한 임상결과를 보이는지 여부를 확인하고자 하였다. 대상 및 방법: 2009년 3월부터 2013년 12월까지 대퇴골 전자간 골절로 내원하였던 환자 중 연구 포함 기준을 만족시키는 164명을 대상으로 하였다. InterTAN군과 PFNA2군 간의 수술 시간, 출혈량, 술 후 방사선적 결과, 합병증 및 최종 추시에서의 임상결과를 비교 분석하였다. 결 과: InterTAN군에서 골유합률 및 골유합까지의 기간, 최종 추시에서 두 군 간의 임상결과는 유의한 차이가 없었다. InterTAN군에서 tip apex distance가 유의한 수준으로 길었으며(p<0.05), PFNA2군에서 근위 대퇴골의 외측벽 골절 빈도가 유의한 수준으로 높게 나타났다(p<0.05). 근위 골편의 활강은 PFNA2군에서 유의한 수준으로 높았다(p<0.05).결 론: InterTAN군과 PFNA2군은 두 군 모두 우수한 유합률을 보이며, 임상 결과는 InterTAN군이 PFNA2군보다 우수하지 않고 비슷한 결과를 보였다. Purpose: The primary purpose of this study was to demonstrate that the TRIGEN (TM) INTERTAN nail (InterTAN) could show better clinical outcome compared to the proximal femoral nail antirotation 2 (PFNA2) for treatment of intertrochanteric fracture in the elderly. Materials and Methods: Between March 2009 and December 2013, 164 patients with intertrochanteric fractures who met our inclusion and exclusion criteria were enrolled in this study. Evaluation variables, including operation time, blood loss during the operation, incidence of perioperative complications, clinical results at the last follow-up, and radiographic findings were assessed for comparison of the 2 implants. Results: Intraoperative lateral wall fracture was significantly higher in the PFNA2 group (p<0.05) and tip apex distance was significantly higher in the InterTAN group (p<0.05). Sliding of the proximal fragment at the last follow-up was significantly higher in the PFNA2 group. However, there was no significant difference in union rate, time to union, postoperative complications, and clinical outcomes at the last follow-up between the 2 groups. Conclusion: Based on these data, clinical outcomes at the last follow-up were equivalent between InterTAN and PFNA2.

八段錦의 文獻的 硏究

장재훈(Jae Hoon Jang),김준한(Jun Han Kim),송성애(Sung Ae Song),손인철(In Chul Son) 대한의료기공학회 2000 醫療氣功 Vol.4 No.2

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.

대학 축구선수의 조기은퇴 원인과 우등생으로써의 변화 연구

장재훈(Jae Hoon Jang) 한국체육교육학회 2010 한국체육교육학회지 Vol.15 No.3

이 연구는 학생운동 선수의 조기은퇴에 대한 대안과 필요성이 제기됨에 따라 대학축구선수의 조기은퇴 원인과 우등생으로써의 변화 연구를 실시하였다. 연구의 목적을 대학축구선수들의 조기은퇴 현황과 원인을 분석하고 조기은퇴 선수들이 대학생활에서 우등생으로 변화된 사례를 알아봄으로써 조기은퇴 선수들을 위한 대안을 세울 수 있는 기초자료를 제공하는데 있다. 연구문제는 다음과 같다. 첫째, 대학축구선수의 조기은퇴 현황을 파악하였다. 둘째, 대학축구선수의 조기은퇴원인을 파악하였다. 셋째, 대학축구선수의 조기은퇴 학생 중 연구 참여자의 대학생활을 알아보았다. 넷째, 우등생에 대한 또래학생의 의식을 알아보았다. 다섯째, 대학축구선수의 조기은퇴 학생이 우등생으로 변화된 사례와 시사점을 알아보았다. 1차 연구 참여자는 대학축구선수의 조기은퇴 현황과 원인을 분석하기 위해 2006년-2009년에 입학한 학생 중 조기은퇴 한 학생 96명으로 개인 신상카드와 상담 일지를 중심으로 분석하였다. 2차 연구 참여자는 조기은퇴 선수의 대학생활, 우등생에 대한 의식, 우등생으로 변화된 사례를 대한 고찰을 위해 조기은퇴 학생 7명, 일반학생 5명을 선정하여 심층면담을 실시하였다. 축구선수의 조기은퇴 현황과 원인분석에 대한 차료처리는 SPSS 12.0을 이용하여 기술통계량을 산출한 양적방법을 사용하였고 심층면담을 통해 얻어진 자료는 텍스트분석을 실시하였다. 연구결과, 대학축구선수의 조기은퇴 현황은 입학정원 218명 중 96명(44.04%)이 조기은퇴 한 것으로 나타났고, 조기은퇴 원인은 공부의 필요성 때문에 19명(19.79%), 운동능력이 부족해서 23명(23.96%), 부상으로 인해 27명(28.12%), 가정 형편이 어려워서 7명(7.29%), 지도자와 불화로 인해 11명(11.46%), 기타 9명(9.38)이었다. 연구 참여자의 대학생활은 학업 성적, 원어민 영어 학습, 어학연수, 자격증을 이용한 취업준비, 리더 역할 등을 수행하여 자신의 영향력을 높이는데 주력하였다. 우등생에 대한 또래학생들의 의식은 학업성적이 우수하고 리더십, 원만한 교우관계, 자기 발전을 위해 투자하는 학생, 타인을 배려하는 마음을 실천하는 학생, 탈렌트적 재능을 발휘하는 학생을 우등생으로 의식하고 있었다. 조기은퇴 학생이 우등생으로 변화된 사례의 시사점은 공부와 운동을 병행한 교육정책의 필요성, 대학의 리더는 사회의 리더로 성장할 수 있고, 자기 개발을 위해 시간과 노력을 투자하는 학생은 미래의 비전을 갖게 된다는 점을 제시하고 있다. This research has been investigated on the early retirement reasons for college soccer players and change into honor students under the circumstance that the necessity of alternatives for the early retirement of student players has been raised. This research investigated the cases of change of early retired players from college soccer players into honor students during their college life for analyzing the current condition and reasons of early retirement and providing early retired players with basic materials for setting up the alternatives. Research questions for accomplishing the purpose of research are as followings: First, it identified the current early-retirement condition of the college soccer players. Second, it grasped the early-retirement reasons of the college soccer players. Third, it explored the college life of participants in the research among early retired students. Fourth, it investigated the recognition of peer groups toward honor students. Fifth, it examined the cases and indications of change from early-retired students to honor students among college soccer players. Participants in the first research were 96 early retired players among students who entered school in 2006~2009. The analysis was conducted by focusing on personal identification card and counselling diary in order to analyze the current condition and reasons for the early-retirement of the college soccer players. The participants in the second research were 7 early retired students and 5 general students. Research and in-depth interview were conducted for examining the college life of early retired students, awareness toward honor students, and change into honor students. Quantitative method of descriptive statistics was applied by using SPSS 12.0 for data dealing in regard to the early-retirement condition of soccer players and cause analysis. As to the data, obtained through in-depth interview, text analysis was carried out. Findings of research on the current condition of early retirement showed that 96 (44.04%) of 218 students retired early. The reasons for early retirement are varied; the necessity of study for 19 players (19.79%), the lack of athletic capability for 23 players (23.96%), injury for 27 players (28.12%), financial difficulty of family for 7 players (7.29%), conflict with a leader for 11 players (11.46%), and other reasons for 9 players (9.38%). Participants in the research made an effort to enhance their power by performing various things; study for getting academic record, English learning from native speakers, language study abroad, acquirement of certificates for job preparation, and role of a leader, and etc. Recognition of peer groups toward honor students are that honor students are excellent in academic grade and leadership, form the amicable relationships with school friends, invest themselves in self-development, practice the mind of taking care of others, and display their talent. Indicating points of change case from early-retired players into honor students are that education policy to combine study and athletics is required, leader of college can grow as a leader of society, and students who invest their time and efforts in self-development have the clear vision of the future.

축구선수의 포지션이 심폐기능과 경기 중 운동강도, 이동거리에 미치는 영향

장재훈 ( Jae Hoon Jang ) 한국스포츠정책과학원(구 한국스포츠개발원) 2010 체육과학연구 Vol.21 No.3

이 논문은 축구선수의 포지션이 심폐기능과 경기 중 운동강도, 이동거리에 미치는 영향을 검증한 연구였다. 연구대상은 2009년 K3 리그에 참여하는 W팀의 선수 40명을 FW(n=12), MF(n=12), DF(n=16)로 구분하였다. 연구목적을 달성하기 위해 경기장을 4등분하였으며, 비디오카메라 4대를 고정하여 촬영한 후 영상분석을 실시하였다. 자료처리는 SPSS 통계 package를 이용하여 one-way ANOVA로 분석하였다. 연구결과, 심폐기능 요인인 최대산소섭취량과 운동지속시간(MF, FW > DW)에서 통계적으로 유의한 차이가 있었고( p<.05), 무산소 성역치시간(MF > FW > DF)은 각각의 포지션에 따라 통계적 유의한 차이가 있었다( p<.05). 경기 중 운동강도 차이는 HRminimum(DF > MF, FW), HRaverage(DF, MF > FW)에서 통계적으로 유의한 차이가 있었다 ( p<.05). 또한 이동거리 형태의 경우 워킹(MF > FW, DF), 조깅(MF > DF, FW), 스프린트(MF, FW > DF), 백스텝(DF > MF, FW), 사이드스텝(DF > FC, MF), 총 이동거리(MF > FW, DF)에서 통계적으로 유의한 차이를 보였다( p<.05). 결론적으로 축구 포지션의 특성이 심폐기능 요인과 경기 중 운동강도 및 이동거리에 영향을 미친다는 것을 확인하였다. 경기력 향상을 위해 포지션 특성에 맞는 보다 높은 체력훈련 프로그램 개발과 적용이 필요한 것으로 생각된다. This study verified effect of different player positions on cardiopulmonary function, exercise intensity and moving distance during games in soccer. As a subject of study, 40 players of W team participated in 2009 K3 League were classified into FW(n=12), MF(n=12), DF(n=16). To achieve the purpose of study, the stadium was quadrisected and 4 cameras were fixed to make a video recording for conducting visual analysis. The date processing was analyzed as one-way NANOVA using SPSS statistical package. The result of the study shows that there were statistically significant difference between V˙ O2max and exercise duration(MF, FW > DF). Also, cardiopulmonary function(p<.05), and anaerobic threshold time(MF > FW > DF) showed statistically significant difference by each position(p<.05). Exercise intensity showed statistically significant difference on HRminimum(DF > MF, FW), HRaverage(DF, MF > FW) during a soccer game(p<.05). And the moving distance showed statistically significant difference on working(MF > FW, DF), jogging(MF > DF, FW), sprint(MF, FW > DF), back-step(DF > MF, FW), side-step(DF > FC, MF), total moving distance(MF > FW, DF) (p<.05). In conclusion, it is confirmed that the features of soccer position has effect on cardiopulmonary function and exercise intensity during a game. The development and application of higher strength training program is thought to be necessary for the improvement of athletic performance.