정지궤도 위성과 지구국간 광통신 링크의 전송속도 해석

한종석,정진호,김영권,Han, Jong-Seok,Jung, Jin-Ho,Kim, Yung-Kwon 한국전기전자학회 1997 전기전자학회논문지 Vol.1 No.1

정지궤도 위성과 지구국간 광통신을 대기상태와 앙각의 함수로써 해석할 수 있는 한모델(Han's model)을 제시하였다. 한모델에서는 대기상태를 맑은날, 구름낀 날, 안개, 헤이즈, 비, 눈의 여섯가지 전형적인 상태로 구분한다. 비트오류을 $10^{-7}$을 만족하는 데이터 전송속도를 한모델을 이용하여 상향링크와 하향링크에 대해 해석하였다. 상향링크시의 포인팅손실이 하향링크시의 대기에 의한 공간 가간섭 저하보다 크기 때문에 데이터 전송속도는 하향링크 보다 오히려 상향링크시에 제한됨을 알 수 있었다. Han's model, which is able to analyze optical communication between earth station and geo-satellite as a function of atmospheric conditions and elevation angles. is presented. In Han's model, atmospheric conditions are roughly classified into six basic types; clear sky, cloud, haze, fog, rain and snow. Data rate satisfying for the BER below $10^{-7}$ is analyzed by Han's model in case of up-link and down-link, respectively. Data rate is more limited by up-link than by down-link because the pointing loss caused by atmosphere on the up-link is greater than the spatial coherence degradation caused by atmosphere on the down-link.

장애를 지닌 여성인력에 대한 취약구조 분석과 지원체계

권명옥,서은정,이한우,이상복 대구대학교 특수교육재활과학연구소 2000 再活科學硏究 Vol.16 No.1

본 연구에서는 여성장애인의 직업실태를 파악하고 문제점을 발견하여 복지대안을 마련하기 위하여 1980년 이후부터 2000년 이전까지의 문헌을 토대로 분석하였다 분석결과에 의하면, 전체 장애인의 약 절반을 차지하는 여성장애인의 직업실태에 관한 체계적 연구가 부족하고, 여성장애인 고용이 불충분하뇌, 취업직종이 단순지콩 및 특종직종에 정형화되어 있다. 또한 이직율이 일반인의 2배이며 이직이유 1순위가 보수로 나타났다. 소득수준이 비현실적으로 낮아서 경제적인 어려움을 겪고 있으며, 고용과정 및 취업상의 차별을 받고 있고, 남성장애인애 비해 인적 자원면에서 열악했다. 또한 직업 및 가사일에 대한 지지체계가 부족하고, 중중여성장애인의 직업재활 대책이 부족하다 여성장애인을 위한 복시대안으로는 장애인에 대한 국민의식 개선이 필요하고, 고용촉진 대안 및 고용증진 방안이 필요하며, 기본생활 보장을 위한 재정적 지원이 필요했다.

Disel 機關의 渦給性能에 關한 硏究

韓龍雲,金重燁,權純益 嶺南大學校 工業技術硏究所 1981 연구보고 Vol.9 No.2

The factors that effect the power output of diesel engine are intake temperature, intake pressure, compression ratio and so on, in constant revolution. Intake pressure and compression ratio of them are much more effective. If the compression ratio is raised, the thermal efficiency of engine increases, but silent driving is difficult for maximum combustion pressure. The durability of engine decreases also for vibration and mechanical strain of materials, and the weight of engine per horse power increases. In this paper an intake pressure in charge of negative effects to lower compression ratio is raised. The compression ratio is decreased through the gasket is replaced by thick copper plate between cylinder and cylinder head. The effect of supercharge is evaluated experimentally from measuring of an engine power output, fuel consumption, and intake air volume. As a result of a decreased compression ratio, it becomes the same as natural aspiration before change compression ratio to increase about 3% to supercharging-pressure change ratio per unit compression ratio in mean effective pressure. And it becomes also the same as natural aspiration before change compression ratio to the increase of supercharging pressure about 1.8% in thermal efficiency. In case the supercharging pressure is much greater than the former to increase intake air pressure, it will give better effects to lower compression ratio than higher compression ratio with natural aspiration.

정신과 입원환자의 정신사회적 스트레스 요인에 관한 연구

한선호,권영준,정한용 大韓神經精神醫學會 1989 신경정신의학 Vol.28 No.6

The psychosocial stressors experienced in the 6 months prior to the admission were studied in 249(140 male and 109 female) psychiatric inpatients who were hospitalized in the Neuropsychiatric department of Soonchunhyang University Hospital from January 1987 to December 1988. The results were as follows : 1) Among the 249 cases, 120(48.2%) cases had the psychosocial stressors prior to admission. 2) 37.9% of male cases and 61.5% of female cases had the psychosocial stressors prior to admission. Female cases had significantly higher occurrence of the psychosocial stressors. 3) By the educational level, there was a significant difference in occurrence of psychosocial stressors prior to admission. Middle school graduates had the highest, no education had the lowest occurrence of the psychosocial stressors. 4) By the occupation, there was a significant difference in occurrence of the psychosocial stressors prior to admission. Housewives had the highest, unemployed had the lowest occurrence of the psychosocial stressors. 5) 90.0% of the cases with adjustment disorder, 81.9% of the cases with anxious disorders, 66.7% of the cases with depressive disorders. 66.7% of the cases with somatoform disorders, 60.0% of the cases with paranoid disorders, 58.1% of the cases with bipolar disorders, 56.1% of the cases with psychotic disorders not elsewhere classified, 27.8% of the cases with organic mental disorders, 27.5% of the cases with schizophrenic disorders, 15.4% of the cases with personality disorders, and 8.3% of the cases with substance use disorders had the psychosocial stressors prior to admission. When cases were grouped into neurosis and psychosis, there was no significant difference between two groups in occurrence of the psychosocial stressors. 6) Major psychosocial stressors with theirs frequency were occupational problems(21.7%), physical illness or injury(20.0%), other interpersonal problems(18.3%), and conjugal problems(16.7%).

신경회로망 제어기를 이용한 PID 파라미터 추정에 관한 연구

權重東,裵銀敬,金恩基,全基英,李承桓,吳鳳煥,李勳九,金容珠,韓慶熙 明知大學校 産業技術硏究所 2006 産業技術硏究所論文集 Vol.25 No.-

In this paper, supposed to solve these problem to PID parameters controller algorithm using ANN. In the proposed algorithm, the parameters of the controller were adjusted to reduce by on-line system the error of the speed of IM. In this process, EBPA NN was constituted to an output error value of an IM and conspired an input and output. The performance of the self-tuning controller is compared with that of the PH) controller tuned by conventional method (Ziehler-Nichols). The effectiveness of the proposed control method is verified thought the Matlab Simulink and experimental results.

한국인 관상동맥의 변화양상에 대한 형태학적 연구

권태정,이상용,이한영,고영창,권기석,조재홍,김태공,김유훈,조갑래,서중석,이원태 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

디자인혁신에 있어서 유사성 판단에 관한 연구 : 의자, 시계, Facade를 중심으로 concentrated on the identity of chair, clock, Facade

한정완,차경준,오희권,류제선 한국디자인과학학회 1999 디자인과학연구 Vol.2 No.-

신제품이 개발 출시되어 크게 성장 할 수 있다는 것은 그것을 채택, 수용해 줄 수 있는 혁신층과 조기수용자 층의 소비자 구조를 가지고 있어야만 한다. 신제품 수용자의 조기 확보는 신제품 개발에 소요된 비용은 조기에 보충할 수 있고, 많은 고객을 확보하여 매출의 증대가 용이하고, 마케팅비용의 감소를 가져올 수 있으며. 시장에서 리더십을 가짐으로써 효과적 시장 진입이 되기도 한다. 이와 같이 신제품의 수용과 확산의 연구에서 혁신성이 차지하는 중요도가 매우 높기 때문에 많은 관심을 끌어 온 것이 사실이다. 그러나 이러한 혁신과 수용성 연구의 중요성에 비추어 혁신성에 대한 발견 사실의 모호성과 함께 관련변수에 관한 끊임없는 논의가 지속되어 왔고, 동시에 혁신성 연구가 지금까지 취하여 왔던 방향과 주제에 관련해서도 많은 비판이 이루어져 온 것도 사실이다. 이러한 관점에서 본 연구에서는 아직 논리적으로나 실체적으로 방법론이 확립되어 있지 않은 디자인 혁신의 개념을 새롭게 정립하고 그 특징과 요소를 분석하고 객관적인 기준으로 변한 할 수 있는 지표를 찾는다. 또한 디자인 혁신에 있어서 유사성 판단에 관한 실험을 통해 제품 집단의 유형과 기준을 명확히 파악하고 각 샘플의 공간 해석과 함께 시자극적 특성을 정량적으로 평가하는 실험적 이론으로 사용하고자 한다. 이는 디자인에 있어서의 혁신을 인지하고 각 제품 속에 속한 샘플들을 특징별로 지각하는 보다 과학적인 디자인 접근방법에 관해 새로운 방향을 모색할 수 있도록 하였다. If a new product Is devised and to be sold, it Should possess the group of people who are inclined to change and accept the product, and the group of consumers who can buy them. If you occupy the consumers to buy the products earlier, you car make up with the expenditure that you have spent to devise and make products, facilitate the raise of the sales, decrease the marketing expenditure, and have effective access to the market by going ahead of others. Like this the Innovation has great influence in the accepting and spreading of the products. However in spite of these Innovation and acceptance, there have kept the ceaseless disputes about finding the Innovation and related function, at the same time the study of innovation has been criticized about the direction and the theme we have taken until now. From this point of view, the methodology has not been established In the area of logic and its reality, and this study tries to set up the concepts and analyze the characteristic and the elements and find the standard to change those characteristics and elements in to objective standard. In addition, through the judgment of the similarity In the design innovation, it tries to identify clearly the types and the standard of the set of the products, Interpret the space of each sample, and use it as the experimental theory to evaluate the visual characteristics, Thus it can perceive innovation of the design. perceive the characteristics of the samples in each products, and find the new direction in the more scientific access to design.

창원대학생의 취업의식에 관한 조사연구

권요한,조희태,양병한,김정태 창원대학교 학생생활연구소 1991 학생생활연구 Vol.4 No.-

조기 가피제거술이 중화상 환자들의 내독소 변화에 미치는 영향

권정은,곽인숙,한태영,김광민 대한화상학회 2003 대한화상학회지 Vol.6 No.2

하지 분절 각도에 따른 수의 등척성 수축(MVIC)시 근전도 비교

김정자,이민형,김연정,채원식,한윤수,권선옥 한국운동역학회 2005 한국운동역학회지 Vol.15 No.1

J. J. KIM, M. H. LEE, Y. J. KIM, W. S. CHAE, Y. S. HAN, O. KWON. Comparison of the maximum EMG levels recorded in maximum effort isometric contractions at five different knee flexion angles. Korean Journal of Sport Biomechanics, Vol. 15, No. 1, pp. 197-206, 2005. The purpose of this study was to quantify the maximum EMG levels and determine if there are differences in these EMG levels with respect to different knee flexion angles. Eight university students with no known musculoskeletal disorders were recruited as the participants. The maximum voluntary isometric knee extensions and flexions were taken from each participant sat on the isokinetic exercise machine (Cybex 340) at five different knee flexion angles (10?30?50?70? 90?. After surface electrodes were attached to rectus femoris, vastus medialis, vastus laterlis, biceps femoris, and semitendinosus, maximum EMG levels at five different knee flexion angles were measured. The results showed that there was no significant difference in maximum EMG levels among five different knee flexion angles. Although there was no significant difference in EMG levels and were some variations among different knee flexion angles, the EMG signals of quadriceps in extension and biceps femoris in flexion were the greatest at 30? It seems that different joint angles or relative locations of body segments might affect the magnitude of EMG levels. Because the maximum EMG levels could change with a different knee flexion angle, an attempt should be made to more accurately measure these values. If then, %MVIC measure provides more reliable data and is most appropriate for EMG normalization.