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.

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.

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.

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.

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.

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.

바닥판의 모드질량산정에 관한 연구

김장윤,황재승,홍성목 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

Modal mass is essential to analyze structural response under disturbance and to design the vibration control devices used to enhance the serviceability of structure. Modal mass differs from that of analytic mathematical model due to the error generated from analytical assumption and construction. Therefore, the objective of this study is to proposed to calculate the modal mass of structure based on the system identification. And the proposed method is applied to two examples, the single DOF system and the slab of apartment.

소아환자 진정요법에서 chloral hydrate의 용량에 따른 진정효과에 관한 연구

노승철,김영재,장기택,한세현 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.3

Chloral hydrate는 소아환자 진정요법 시 hydroxyzine과 함께 가장 일반적으로 사용되는 약물임에도 불구하고 협조도가 불량한 어린 환아들의 행동조절을 위한 적절한 용량에 대한 의견이 분분한 실정이며, 또한 chloral hydrate를 제조사의 추천용량으로 사용 시 적절한 진정수준을 제공하는데 있어 잦은 실패를 초래하는 경우를 볼 수 있었다. 지금까지도. chloral hydrate를 사용함에 있어 약물의 용량에 따른 진정의 효과와 안전성 측면에서 많은 의견들이 존재한다. 본 연구는 소아환자 진정요법에서 chloral hydrate의 용량에 따른 진정의 효과와 안전성 측면에서 적절한 용량을 제시하고자, 소아환자 진정요법 시 제조사의 추천용량인 chloral hydrate 50mg/kg와 더 높은 용량인 70mg/kg을 hydroxyzine 2mg/kg와 50% N₂O와 함께 투여하고, 진정의 효과와 안전성을 비교, 평가하여 다음과 같은 결론을 얻었다. 1. 수면, 울음, 움직임, 전체적인 행동양상에 대한 두 군 간의 비교, 평가에서 Ⅱ군(70mg/kg)이 Ⅰ군(50mg/kg)에 비해 네 가지 항목 모두에서 유의하게 더 높은 평균값을 나타내었다(p<0.05). 2. 진정요법의 성공률에 대한 두 군 간의 평가에서 Ⅰ군은 38.7%, Ⅱ군은 71.0%의 성공률을 나타내었으며, 통계적으로 유의한 차이를 나타내었다(p<0.05). 3. 저산소증의 발생률에 대한 두 군 간의 평가에서 Ⅰ군은 22.6%, Ⅱ군은 19.4%의 발생률을 나타내었으며, 통계적으로 유의한 차이가 없었다(p>0.05). Despite the widespread use of chloral hydrate with hydroxyzine in the sedation of children, there is little agreement among pediatric dentists regarding its therapeutic dosage for the management of very uncooperative young children. Also, increasing concern has been raised with respect to its frequent failure to provide adequate levels of sedation when used according to the manufacturer's recommended dosage. Therefore, there has been many suggestions with respect to sedative effectiveness and safety of varying drug dosage, and some pediatric dental articles have advocated dosages exceeding manufacturer's recommendations. This study was performed to compare the effectiveness and safety in behavior management of the manufacturer's recommended dose of chloral hydrate(50mg/kg) with those of a higher dose(70mg/kg) used together with hydroxyzine(2mg/kg) and nitrous oxide(50%) when young children were sedated for dental treatment. The following results were obtained; 1. Ⅱ group(70mg/kg) displayed higher mean score compared to Ⅰ group(50mg/kg) with regard to the degree of sleep, crying, movement and overall behavior. The difference was statistically significant(p<0.05). 2. In comparison of success rates for sedation between the two groups, Ⅰ group and Ⅱ group showed 38.7% and 71.0% success rates respectively. An analysis of variance was statistically significant(p<0.05). 3. Comparing the occurrence rate hypoxia between the two groups, there were 22.6% and 19.4% occurrence of hypoxia in Ⅰ group and Ⅱ group. An analysis of variance was not statistically significant(p>0.05).