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- 저자 : 김관(Kwan Kim) (검색결과 197 건)
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Low-resistance ohmic contacts to p-$Hg_{0.7}$$Cd_{0.3}$Te
김관,정한,김성철,이희철,김충기,김홍국,김재묵,Kim, Kwan,Chung, Han,Kim, Sung-Chul,Lee, Hee-Chul,Kim, Choong-Ki,Kim, Hong-Kook,Kim, Jae-Mook The Institute of Electronics and Information Engin 1994 전자공학회논문지-A Vol.31 No.10
Ohmic contacts between Au and p-HgHg_{0.7}Cd_{0.3}Te$ with low specific contact resistance have been obtained. The contact region of the wafer is first pre-heated for 5 seconds in a rapid thermal processing equipment. The temperature reaches a maximum value of about 200$^{\circ}C$ at the end of the 5 seconds. Next, a thin Au film is formed on the contact region by immersing the sample in AuCl$_{3}$ solution. the sample is then post-annealed in the same condition as the pre-heating after Pb/In pad metals are deposited on the electroless Au contacts. The specific contact resistance measured by transmission line model is 5${\times}10^{-3}{\Omega}cm^{2}$ at 80K. RBS and differential Hall measurement data suggest that the above low resistance ohmic contact is ascribed to surface traps and increased gold diffusion rate.
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김관일(Kwan -Il Kim),서경석(Kyung-Suk Suh),김주현(Joohyun Kim),신우영(Woo Young Shin),이남준(Nam-Joon Yi),장진영(Jin-Young Jang),김선회(Sun-Whe Kim),김세형(Se Hyung Kim),이건욱(Kuhn Uk Lee) 한국간담췌외과학회 2008 한국간담췌외과학회지 Vol.12 No.2
Purpose: The incidence and risk of malignancy are elevated in solid organ transplant recipients compared to persons in the general population. Epidemiological data reveal that the length of exposure to immunosuppressive therapy and the intensity of therapy are clearly related to the post-transplant risk of malignancy. The purpose of this study was to investigate the course of incidental intraductal papillary mucinous neoplasms (IPMN) of the pancreas after liver transplantation. Methods: We retrospectively reviewed the medical records of 17 patients with IPMNs of the pancreas who underwent liver transplantation between January 2000 and December 2006. The mean follow-up duration was 29.6 ± 22.8 months. Results: The mean patient age was 55.2 ± 7.2 years, and the male to female ratio was 14:3. All patients had branch duct type IPMNs. The lesions were located principally in the head (64.7%) and body (52.9%) of the pancreas. The mean tumor size was 13.0 ± 6.2 mm. There were no newly developed symptoms associated with these lesions, and none of the lesions enlarged during the follow-up period. No patients underwent surgical resection of their lesions. Conclusion: The course of each of the incidental small IPMNs of the pancreas was uneventful for more than 2 years after liver transplantation. Therefore, patients with incidental small IPMNs of the pancreas are not immediate candidates for surgical pancreas resection. However, a longterm follow-up study with a larger sample size will be required to establish treatment guidelines in immunosuppressed patients.
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테니스 동호인의 계획행동, 동기, 실행계획, 극복계획, 심리적 웰빙과 일빙 간의 관계
김관중(Kim, Kwan-Joong),송용관(Song, Yong-Gwan) 한국웰니스학회 2021 한국웰니스학회지 Vol.16 No.4
이 연구는 생활체육분야에서 테니스 동호인들이 테니스에 참여하면서 형성된 계획행동이 자기결정동기, 실행 및 극복계획, 그리고 심리적 웰빙과 일빙과 어떤 관계가 있는지 규명하였다. 이를 위해 P시에서 활동 중인 테니스 동호인 114명을 대상으로 설문조사를 진행하였다. 수집된 자료는 SPSS와 AMOS를 이용하여 빈도 분석, 기술통계 분석, 신뢰도 분석, 확인적 요인분석, 상관분석, 경로 분석을 실시하였다. 연구결과, 첫째, 테니스 동호인의 태도는 자율성 동기에 정적인 영향을 미치는 것으로 나타났으며, 무동기에는 부적인 영향을 미치는 것으로 나타났다. 또한, 주관적 규범은 자율성 동기에 정적인 영향을 미치는 것으로 나타났다. 둘째, 테니스 동호인의 자율성 동기는 실행계획과 극복계획 모두 정적인 영향을 미치는 것으로 나타났고, 무동기는 실행계획에 부적인 영향을 미치는 것으로 나타났다. 셋째, 테니스 동호인의 실행계획은 심리적 일빙에 정적인 영향을 미치는 것으로 나타났고, 극복계획은 심리적 일빙에 부적인 영향을 미치는 것으로 나타났다. 결과적으로, 테니스 동호인이 인식하는 계획행동은 동기 유형에 중요한 영향을 미치며, 이러한 동기 유형은 극복계획과 실행계획에 영향을 미치는 것으로 나타났다. 극복계획은 심리적 일빙을 예방하는 데에도 중요한 역할을 하는 것으로 밝혀졌다. 자율성 동기가 테니스 동호인들의 건강한 운동참여를 권장하고 심리적 삶의 질에 긍정적인 영향을 미친다는 사실을 알 수 있었다. Based on the theory of planned behavior (TPB; Ajzen, 1991), the purpose of this study was to examine the relationship between psychological well-being and ill-being, action and coping planning, self-determined motivation, and planned behavior in tennis participant’s. To this way, tennis participants of 114 asked to complete the questionnaire of quality of health-related life (i.e. psychological well-being), burnout (i.e., psychological ill-being), action and coping planning, self-determined motivation, and planned behavior. Collected data was analyzed on reliability, factorial validity, correlation and structural equating modeling using SPSS and AMOS programs. The main results showed that attitude within planned behavior positively predicted autonomous motivation and it negatively predicted amotivation. Second, The subjective norm directly predicted autonomous motivation. The action and coping planning also directly predicted autonomous motivation. Third, amotivaton negatively predicted action planning. Finally, the action planning positively predicted psychological ill-being whereas coping planning negatively predicted psychological ill-being. In conclusion the findings provide valuable and useful information that action and coping planning of tennis participant’s can be an important role to enhance beliefs that physical activity is beneficial.
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연극놀이 활동이 주의력결함 과잉행동 장애아동의 사회 적응 행동에 미치는 효과
김관일(Kim Kwan-Il),하영희(Ha Young-Hee) 한국재활과학회 2003 難聽과 言語障碍 Vol.26 No.2
Purpose to analyze effect that Creative Drama gets in Increase of ADHD child's adaptation action through activity is as following. First, Creative Drama effect that activity gets in increase of child's possession action effect recognize. Second, Creative Drama activity effect on Increase of child's pro-social action recognize. Research target coincides in ADHD diagnosis standard among second-year student child in Busan City B primary school and child who there is no problem on colloquial communication chose 3 people. A research tool used because spolin and elementary school teacher play meeting play red sky modify program and secure and activity number of times composes and enforced for 4 weeks 20 circuits. Data processing used reversal design method, and graphed frequency of target action that 6 observers observe frequency of target action directly by time sampling and is observed. If examine study finding, First, week's ADHD child's possession action the mountain through activity of Creative Drama increased. Second, p]ay red sky showed much increases to ADHD child's pro-social action through activity, This research is that Creative Drama does activity and preview that concentration action of week and pro-social action that is second-year student ADHD child's target action in primary school can increase. Correct various program must be developed and is applied in spot succession research about children of other obstacle area and children's ability.
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김관문(Kwan Moon Kim),김영석(Young Seok Kim),정성욱(Seong Uk Jeong),김성현(Sung Hyun Kim) 한국공업화학회 2002 공업화학 Vol.13 No.6
환경 친화적인 폐기물 처리 방법으로 활발한 연구가 진행되고 있는 열분해 공정은 연료유를 얻을 수 있는 장점을 가지고 있으나, 반응기내의 탄소 침적 문제로 인하여 상용화는 이루어지지 않고 있다. 반응기 내 탄소 침적체는 열분해 공정의 부산물로서 열 전달 저하 및 조업 효율을 떨어뜨리게 된다. 본 실험에서는 폐윤활유를 열분해 하였을 때 반응기 내에서 생성되는 탄소 침적체의 특성을 연구하였다. 또한 탄소 침적체의 생성을 억제하기 위하여 적절한 반응기 재질 선정 실험을 수행하였다. 철, 구리, 니켈, 알루미늄, 그리고 스테인레스 합금을 이용하여 탄소침적 현상을 최소화 할 수 있는 반응기 재질을 선정하였으며, 알루미늄 재질에서 침적체 생성이 가장 억제됨을 알 수 있었다. 기상에서의 탄소 침적 성장과정을 SEM을 이용하여 분석하고 탄소 침적체의 탄소와 수소 함량을 원소분석을 통해 알아보았다. The carbon deposition, a by-product, on the inner surface of a reactor during pyrolysis process makes the process undesirable even if pyrolysis is regarded as an environmentally benign and useful process, since it can be used to produce fuel oil as well as to recycle waste polymers. However, the aggregated carbons on the reactor wall decrease the reactor efficiency by reducing heat and mass transfer rate. In this study, to reduce the carbon deposition various reactor materials were tested and compared. The results showed that aluminum, among iron, copper, nickel, aluminum, and stainless steel alloys, was the best at reducing the coke formation on the reactor wall. Scanning Electron Microscopy (SEM) and Elemental Organic Analysis (EOA) were employed to examine the growth kinetics of carbon deposition onto the reactor wall, the morphology of coke, and the amount of carbon and hydrogen in the coke.
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김관중(Kwan-Joong Kim),김병기(Byung-Gi Kim) 한국정보과학회 1995 한국정보과학회 학술발표논문집 Vol.22 No.1
객체지향 시스템에서 객체의 크기는 매우 작은 반면 그 수는 수천에서 수만개 정도로 매우 많다. 이들 개개의 객체는 그 자체로서 하나의 세그먼트에 할당되는 것이 자연스러운 일이다. 그러나 현재의 세그먼테이션 개념으로 객체를 할당한다면 내부 단편화 현상에 의해 많은 양의 메모리를 낭비하게 된다. 따라서 객체 크기의 다양성 만큼 세그먼트의 크기 또한 다양해야 한다. 본 논문에서는 다양한 크기의 블럭을 제공하기 위해 동적 메모리 할당 기법의 하나인 가중치 버디 기법을 확장하는 방법 4단계를 제안하고 시뮬레이션을 통해 비교 고찰하여 객체지향 시스템에 적용가능한 확장 방법과 보다 나은 성능을 위한 연구 방향을 제안하고자 한다.
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김관중(Kim Kwan Joong),김병기(Kim Byung Gi) 한국정보처리학회 1997 정보처리학회논문지 Vol.4 No.6
An extension of the weighted buddy system, called the extended-weighted buddy system, for dynamic memory allocation in an object-oriented computer is presented. The extended-weighted buddy system allows block sizes of 2^k, 3*2^k, 5*2^k, 7*2^k, whereas the original weighted buddy system allowed block sizes of 2^k and 3*2^k. This extension is achieved at only the cost of additional 3 bits per block for memory management unit.Simulation results are presented which compare our method with the weighted buddy system. These results indicate that, for uniform request distributions, our system has less internal memory fragmentation than the weighted buddy system(approximately 60%). And, for exponential request distributions, it has less internal memory fragmentation than the weighted buddy method (approximately 50%). The external fragmentation is greater for this system than the weighted buddy system. But, our system has less total memory fragmentation for exponential request distributions, and two systems take a similar total memory fragmentation for uniform request distributions, so we can substitutes the extended-weighted buddy system for weighted buddy system.
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