뇌의 미만성 축삭 손상 정도, 지능 지수 그리고 예후와의 상호관계

양승민,김영백,권정택,박승원,황성남,최덕영 중앙대학교 의과대학 의과학연구소 2001 中央醫大誌 Vol.26 No.2

Diffuse axonal injury (DAI) is defined as posttraumatic coma for over 24 hours without intracranial mass lesion. the purpose of this study was to examine the neurologic state of the patient and to evaluate the psychiatric sequela after DAI by psychometric analysis.Twenty eight patients with DAI were analyzed by a psychoanalyzer. Electroencephalography and magnetic resonance(MR) imaging were performed on eighteen patients. The ratio of male to female was about 6 to 1 and the major cause was traffic accident followed by fall down. Radiologic abnormality in MR image was predictors of poor outcome and early neurologic state was one of the most significant prognostic factor. Psychometric anlysis revealed that lntelligence Quotient was correlated with outcomes and most of patients with DAI were in normal range of lntelligence Quotient(67.9%) but they have suffered from variable psychologic problems, such as depression, anziety, phobia and dementia. Previous studies in DAI have been based principally on the prognostic factors and treatment without a systemic apporach to their meurologic and psychologic problems. Psychometric analysis can reveal psychologic symptom in the patients with DAI and appropriate management of their psychiatric problems may carry important implications for management of patients with moderate or servere DAI and improve rehabilitation outcomes.

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.

분포정수 회로해석과 고장 조건을 이용한 지중 케이블 시스템 고장점 표정 알고리즘

李德洙,楊霞,崔勉松 明知大學校 産業技術硏究所 2005 産業技術硏究所論文集 Vol.24 No.-

본 논문은 분포정수회로 해석 방법에 기초한 새로운 지중 케이블 고장점 표정 알고리즘을 제안한다. 제안한 방법은 장거리 가공선로 해석에 적용되는 분포정수회로 해석 방법인 쌍곡선 함수 해석 방법을 케이블 시스템에 응용하여 코어와 시스에 관한 전압, 전류 방정식을 세우고, 각 고장에 대한 전체 회로를 분석하여 각 고장조건을 만들고 그것을 이용하여 고장거리에 관한 방정식을 수립한다. 마지막으로 저력계통 과도현상 해석 프로그램으로부터 측정한 케이블의 전압, 전류 데이터를 입력하고, 뉴튼-랩슨 반복법을 이용하여 고장거리를 추정한다. PSCAD/EMTDC를 이용하여 케이블의 다양한 고장을 모의하였으며, 제안한 알고리즘을 검증하였다.

사례기반추론기법을 이용한 선체 횡부재 구조설계 지식 표현 방법론 연구

윤덕영,양동열,차명석 朝鮮大學校 機械技術硏究所 1998 機械技術硏究 Vol.1 No.1

This paper shows the knowledge representation method for the possibility of the automation of the design and modeling of ship web frame in the level of detailed design using parametric design and case-based reasoning technique. It turns out that Case-Based Reasoning(CBR) based on casual model is successfully applied for the design automation.

受注價格 決定을 위한 原價分析

崔德圭,權貴良 동아대학교 경영문제연구소 2000 經營論叢 Vol.21 No.-

This study aims to investigate the entire problems related to cost accounting while minor manufacturing enterprises reach the price decision for merchandise in case of receiving their order in Korea and to provide some data required to more effective cost accounting in the future. Therefore, the main points of this study can be summed up as follows: First, it is shown from the analysis of the type of cost accounting system applied that 44% of the whole enterprises adopt an estimated cost accounting method while 37% of them adopt an actual cost accounting method. Thus, it is proved that market production-oriented enterprises adopt mostly an actual cost accounting method. It can be seen that more highly competitive enterprises adopt an actual cost accounting method while a monopolistic enterprise adopts an estimated cost accounting method. As for the survey concerning the purpose of cost accounting, it is proved that 63% of them account cost for the price decision in case of receiving an order. For the question such as which department estimates unit cost during the price decision in case of receiving an order, 56% of them answer that purchase department estimates unit cost, and this rate shows the highest. Second, as for the analysis of factor deciding the rate imposed on overhead cost in cost accounting to receive an order, they reply that they impose overhead cost in order to include a part of incidental expenses and personnel expenses of managers in accounting manufacturing cast among the selling price and managing expenses in addition to direct manufacturing expenses, and they reply that they decide the proper rate imposed on overhead cost on the basis of exact cost accounting in their post cost accounting and price before receiving an order. Third, it is proved that there is significant difference between an actual cost required and cost suggested by enterprise after the completion according to which department accounts the price ordered. Fourth, as for the analysis of contracting construction work, it is proved that 37% of the whole enterprises reply that about 85% of an estimated amount are required to the contract when they suggest an estimated amount to an ordering place while 36% of them reply that 90% of an estimated amount are required. In this respect, it can be seen that most of them take 10% to 15% off from the regular amount and 41% of them reply that main reason why they discount an estimated amount is customary. It is firmly believed that the results of this study will help to show a new bearing and a turning point for cost accounting system of minor manufacturing enterprises which have not yet completely possessed it after the analysis of problems in accounting cost in case of deciding the price ordered when making an object of further study big enterprises which have cost accounting system ready.

GMAHN 환경에서의 TCP 프로토콜 성능 분석

吳世德,金玄旭,李光培,張良根,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.-

Recently, GMAHN that provides interface between MANET and Wired Network has been focused in Mobile Communication. It is necessary that The technology provide reliable data transmission technology between mobile node and wired network in MANET environment that varing by the node movement. In this paper, using the TCP protocol(Tahoe, Reno, Vegas, SACK)that increases reliability between source and destination, we applied the TCP protocol mechanism to various environment, and compared result, and also proposed the efficient TCP mechanism by comparing each mechanism.

港灣 시스템의 生産性 堤高를 위한 戰略的 計劃에 관한 硏究

許南秀,梁漢洙,金俊式,崔德哲 慶南大學校 産業經營硏究所 1990 産業經營 Vol.13 No.-

原電에서 부하추종이 BTRS에 미치는 영향

홍원표,양현수,강 용,강덕원 忠南大學校 産業技術硏究所 1988 산업기술연구논문집 Vol.3 No.1

With the growing need of the country's electrical energy from nuclear power generation, the technical importance on the load following has been widely recognized. The load following is being executed by two modes, Boron Regeneration System(BRS) and Boron Thermal Regeneration System(BTRS). Especially, the function of BTRS is solely relied on the efficient use of Boration/dilution in strongly basic resin bed. Therefore, the most influential factors to be investigated in load following operation is to determine the effect of boron concentration in burn-up reactivity and to find the way how to improve the BTRS in order for reusing all the reactor cooling water contaminated by radioactive wastes. This study is mainly devoted to the following purposes : (1) Evaluation of operation data in nuclear power plant about the relation of burn-up reactivity and boron dilution/ boration in BTRS. (2) Diagnostic suggestion on the solving problems in operation of Demineralizer(exchange resin bed).

高X線 吸收유리에 있어서 BaO, SrO의 含量變化가 液相溫度에 미치는 影響

李卿喜,梁在翊,金德文,姜元浩 明知大學校 産業技術硏究所 1987 産業技術硏究所論文集 Vol.6 No.2

The liquidus temperature was observed according to the change of content BaO 6 W/O ~ 12W/O and SrO 1 W/O~4W/O in R₂O-PbO-Al₂O₃- (BaO+SrO+SiO₂) glass system. The liquidus temperature varied between 810°C ~ 950°C in these glasses. The effect of BaO & SrO content to the liquidus temperature of the glasses are as follows. 1. The variation of the liquidus temperature were remarkable by the content of SrO in the range of BaO contents from 6 W/O to 8 W/O. 2. The minimum liquidus temperature is located at the composition of BaO 8 W/O SrO 4 W/O SiO₂ 68 W/O.

관광자원으로서의 자연휴양림의 관광환경분석과 문제점에 관한 연구 : 유명산, 대관령, 청태산 중심으로

김종은,양덕희 慶熙大學校 觀光産業情報硏究院 2000 觀光産業情報論集 Vol.2 No.-

Rapid growth in living standards and leisure time has increased the demand for leisure facilities, and concentration of cities and environmental pollution have created more demand for green space. Now people think of forestry more as the space for rest and leisure than as that for wood production, The demand for the forestry of the city people, who want to escape from the routine, has exploded and will continue to grow. Forestry Administration started to develop 'forest for recreation' in 1988. As of December 1999, it has designated about 176 places as forest for recreation, 83 of which have been already completed. The government mobilized the people in an unprecedented afforestation campaign to plant trees in the barren hills and mountains at the beginning of the national foundation. The successful campaign has brought dense woods back, Beautiful valleys and natural ecology have recovered its value as tourism resources. The natural forest for recreation has created variety of benefits for general public. It helps individuals to relax and thus increase productivity and living standard. It has helped to meet the demand for leisure not only as a place of out-door activity but as a place for nature exploration. It also helps to enhance the underdeveloped economy and cultural standard of remote isolated villages. Short history of recreation forest uncovered a lot of problems in the areas of development, management and operation, which requires urgent attention.