Global-MAHN에서 라우팅 오버헤드 개선에 대한 연구

張良根,金玄旭,李光培,吳世德,裵振勝,金在浩 明知大學校 産業技術硏究所 2007 産業技術硏究所論文集 Vol.26 No.-

In this Paper, we studied the mechanism that increases the network reliability and decreases network load in GMAHN environment based on the AODV routing protocol. This proposed algorithm is the research on the algorithm, minimizing network overhead by preventing unnecessary network overhead previously and adapting Local repair mechanism to efficient data transmission when route error happens in network, in GMAHN environment. To evaluate the proposed algorithm's performance, we analyzed the proposed algorithm and adapting in various experiment environment according to 5 experiment viewpoint such as node movement, gateway network zone, mobile node number, flow number. After evaluating the experiment, we confirmed better network improvement altogether through following result such as total average data reception rate's increase, average data transmission time's decrease, network overhead's decrease than existing GMAHN algorithm.

초고층아파트의 거주특성에 관한 연구 : focused on the somparative amalysis of high-rise apartment in pusan 고층아파트와 비교분석을 중심으로

장승재,김동완 新羅大學校 1999 論文集 Vol.47 No.-

Super high-rise apartment, being a new housing pattern, have constructed a kind of building that increased in number and elevation, due to such as an economical use of land, a decrement of construction cost, a necessity of reorganization for urban district, a new urban life cycle of residents. Therefore, this study is aimed at investigating the residential character, and analysed the safety of residence, resident's satisfaction, and psychological behavior to compare super high-rise apartment above 20 stories with high-rise apartmenr below 15 stories in Pusan. Compared super high-rise apartments with high-rise apartments, residents in super high-rise apartments have been prefered to the super high-rise apartment and below 10stories, on the other gand, have been dissatisfied with the children's living, psychological stabilities in the safety of residence and psychological behavior aspects. Specially, super high-rise apartments have large problems such as the high possibility of accidents in balcony, the occurrence of wind noese, and the vibraftion of buildings in the safety of residential consciousness aspect.

空調設備 冷熱原시스템 更新에서 最適 代案시스템 選定을 위한 評價 硏究

장승재,김동완 신라대학교 자연과학연구소 1999 自然科學論文集 Vol.6 No.-

The renewal for the primary cooling system of existing office building requires to consider many factors such as life cycle cost factor, resource use factor, functional factor, indoor quality factor, architectural quality factor and environmental factor. However the current renewal method mostly considers only the simple economic factor even not taking into account the life cycle of the equipment. And, therefore, it could not evaluate the integrated performance of various optional renewal cases. The purpose of this paper is to introduce a statistical method - AHP(analytic hierarchy process) and to evaluate three optional cooling renewal cases such as turbo compression type, thermal storage type and absorption type for office building.

建築設備시스템 更新 評價基準 設定에 관한 硏究

장승재,김동완 신라대학교 자연과학연구소 1999 自然科學論文集 Vol.7 No.-

Nowadays, it is common and will be more often trend toward building and building equipment system to be reinstalled newly because of low of utility value as to deterioration and obsolescence. Building equipment system which is used for the amenity of indoor environment is composed of various components and their assemblies, and that is cause of not only renewed installation but also cost for solving them. It is shown as confused making-decision processes when the renewed equipment scheme of building proceeds. So, it is necessary and useful to evaluate them closely. therefore, this study is aimed to set renewal evaluation criteria of each sub equipment system for corrected renewal evaluation.

MATLAB을 이용한 자동차 엔진모델 설계 및 시뮬레이션

장종승,설재훈,김승철,임영도 東亞大學校 附設 情報通信硏究所 1997 情報通信硏究所論文誌 Vol.5 No.1

Detailed model of longitudinal dynamics of a typical automobile is developed. A nonlinear controller is designed for speed control of the automobile. This paper discribes the first step of a vehicle model design which designs a engine model. The design of a vehicle engine designs Matlab Simulink, and control which is compared describes characteristics be using Fuzzy and PID.

쉰소리로 발현한 흉부 대동맥류 1예 : Ortner씨 증후군 orther`s syndrome

장이선,진승원,박희철,박진아,윤희정,이종민,김재형 대한내과학회 2003 대한내과학회지 Vol.64 No.1

Ortner씨 증후군은 다양한 심장 질환에 이차적으로 생긴 반회 후두 신경 마비에 의한 쉰소리를 특징으로 하는 임상 질환이다. 저자들은 흉통없이 발생한 쇤소리를 주소로 내원한 환자에서 좌측 반회 후두 신경의 손상에 따른 성대 마비의 1차원적인 원인으로 대동맥궁 부위에서의 대동맥류를 진단하였기에 문헌 고찰과 더불어 보고하는 바이다. Ortner's syndrome is a clinical entity with hoarseness due to a left recurrent laryngeal nerve palsy caused by cardiac disease. It is a recognized complication of a number of conditions including, atrial septal defect, patent ductus arteriosus, primary pulmonary hypertension, Eisenmenger's syndrome and aortic aneurysm. A 71-year-old woman with a history of hypertension and diabetes complained hoarseness and hemoptysis for 3 days. Chest X-ray showed a soft tissue mass shadow in the left upper lung field and chest CT scan revealed a thoracic aortic aneurysm. We report a case of left recurrent laryngeal nerve palsy due to a huge thoracic aortic aneurysm in an old woman. (Korean J Med 64:105-108, 2003)

진행성 위암과 동반된 후복막 섬유화증 7예의 임상적 고찰

장재영,천영국,최우봉,김진오,조주영,이준성,이문성,심찬섭 순천향의학연구소;Soonchunhyang Medical Research Institute 2000 Journal of Soonchunhyang Medical Science Vol.6 No.1

Background/Aims: Retroperitoneal fibrosis is a fibrosing disease process which frequently develops ureteral obstruction. Malignant retroperitoneal fibrosis has been reported that various types of cancer including cancer of the breast, stomach, prostate, lung, cervix, uteri, colon, pancreas, ovary, and even Hodgkin's disease. While the pathogenesis remains obscure, small foci of metastatic neoplasm in the retroperitoneal space can elicit a desmoplastic reaction in secondary form to malignancy. Methods: Recently we experienced 7 cases of retroperitoneal fibrosis with advanced gastric cancer. So, we report 7 cases of retroperitoneal fibrosis with clinical and radiologic characteristics. Results: The most common signs and symptoms were related irreversible renal dysfunction. The urologic finding noted medial deviation of the involved ureters and hydronephrosis Conclusions: Clinical manifestations are abdominal pain, back pain, hydronephrosis, and uremia. When sudden back pain and hydronephrosis develop in advanced malignancy, physicians should be considerd for retroperitoneal fibrosis.

空氣調和시스템 更新評價를 위한 意思決定方案에 관한 연구

장승재,김동완 신라대학교 자연과학연구소 1998 自然科學論文集 Vol.5 No.-

Recently, renewal requirements resulted from obsolescence and deterioration of buildings and mechanical systems show a tendency to increase. On this point of view, the purpose of this study is to establish theoretical evaluation methodology of renewal plan of building HVAC system, such as renewal acceptance or rejection, renewal cost, renewal priority order. Failure rate, operating inferiority, adverse minimum and urgency rating were selected and used for evaluation factors of AHP(Analytic Hierarchy Process) which used in this study. Renewal evaluation by AHP will be come into provide successful methods to plan economical maintenance and renewal scheme.

탄화수소에 의한 NO의 선택적 촉매 환원 반응에서 Pt/MCM-48 촉매의 반응 메커니즘에 관한 연구

양재승,이성철,장재훈,이병용,정석진 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.4

기본형의 Si-MCM-48에 알루미늄 치환량과 귀금속 담지량의 변화에 따라 다양한 촉매를 제조하였고, 이를 탄화수소에 의한 선택적 촉매 환원(HC-SCR)반응에 적용하여 각각의 NO 환원반응 특성을 비교 고찰하였다. Pt/MCM-48 촉매의 NO 환원 활성을 고찰한 결과, 문헌상 보고 되고 있는 Pt/ZSM-5 촉매를 이용한 NO의 제거 활성과 비교하여 매우 우수한 결과를 보였다. 또한 5 vol% 이하의 산소 조건에서 그 활성이 현저하였으며, 특이하게 최고 활성에 도달한 후에 반응온도가 600℃까지 증가하여도 계속하여 그 활성을 유지하였다. XRD, TPD, TGA, XPS 등의 특성화를 통해 촉매의 표면 특성 및 반응 mechanism에 관한 연구를 수행하였으며, 이러한 결과로부터 Pt/MCM-48 촉매가 기존 촉매보다 일정 산소 조건에서 우수한 성능을 보이는 것은 담체의 표면 산특성과 촉매 고유의 redox mechanism에 기인한 것으로 해석하였다. Pt supported on MCM-48 was tested as a new catalyst for hydrocarbon-SCR process. MCM-48 is a new support material of the catalyst for SCR. Characterization and de-NO, activity test were performed for the newly synthesized MCM-48-supported catalysts. Pt(l wt%)/MCM-48 showed 90% of NO reduction at 250-500℃. It should be concluded, from what has been said above, that Pt/MCM-48 catalysts showed higher NO reduction conversion than zeolite based catalyst, and it was not affected by 5 vol% O₂ concentration and water vapor addition. It would be supposed that sustention of activity in that oxygen condition might be caused by surface acidic characteristic and its characteristic redox mechanism.

제7차 교육과정의 효율적 적용을 위한 고등학교 체육수업 실태조사

김승재,박장평 강원대학교 체육과학연구소 2000 江原大學校附設體育科學硏究所論文集 Vol.- No.23

A Research on high School Physical Education Classes for the Effective Application of the 7th Curriculum This research was performed to provide the fundamental materials for the selection of the effective form and content of the newly curriculum as surveying the understanding for the overall physical education class with 576 college student experienced in their high school age. We obtained the four results as following. First, the experience of understanding about the meaning and purpose of physical education, boy students were mostly higher than girls. And also the percentage of interest, boy students were high. They recognized the reason that they fell interested in P.E. class was that it made them feel better. And the reason that they felt it painful was that it always demanded beyond their ability. Second, in the case of warm-up, the percentage of the answers that there had been teacher's instruction were the highest. The pattern of warm-up were the highest practiced in a proper way without particular way. And the experience of learning about the need of warm-up, the answers that they have not learned about the need in detail were high. In the case of cool-down, the answers that it had never been due after class were the highest, and it was not changed their feeling after cool-down. The answers were high that they had learned it a little in the experience of learning about the need of cool-down. Third, the answers were high that they didn't know how the physical grade was scored, and they recognized the physical grade was scored as distinguishing the students who did well and didn't. Finally the answers were high that high that they didn't we of the content they learned in the P.E. class. However the boy students like to play basketball and soccer, and the girls like to play badminton. It was the highest that the number of playing is 4 times a week and the time is one or two hours. Therefore they want forward to play swimming and tennis best.