鐵綱産業의 競爭力 强化 戰略에 관한 연구

김학중,이일수,강규철 聖潔大學校 社會科學硏究所 1997 社會科學硏究 Vol.4 No.1

송이 (Tricholoma matsutake) 자실체의 화학성분

이학주,최윤정,가강현,박원철 한국목재공학회 2003 목재공학 Vol.31 No.4

송이(Tricholoma matsutake) 자실체의 메탄올(methanol, MeOH) 추출물로부터 4개의 화합물을 분리하였으며, 기기분석 결과 adcnosinc (9-β-D-ribofuranosyladenine)을 비롯하여, methyl trans-cinnamate, ergosterol (ergosta-5, 7, 22-triene-3β-ol) 및 ergosta-4, 6, 8 (14), 22-tetraen-3-one으로 각각 동정하였다. One alkaloid derivatives, one amide and two steroids were isolated from the fruit bodies of Tricholoma matsutake. The structures were determinded as adenosine, methyl trans-cinnamate, ergosterol and ergosta-4, 6, 8 (14), 22-tetraen-3-one, respectively, on the basis of spectroscopic data.

퍼지 제어기의 Scaling Factor의 영향 분석

서선학,이철희 江原大學校 産業技術硏究所 1995 産業技術硏究 Vol.15 No.-

In this paper, we analyze the effects of scaling factors on the performance of a fuzzy controller. The quantitative relation between input and output variables of a fuzzy controller is obtained by using a quasi-linear fuzzy model. And an approximate transfer function of a fuzzy controller is derived from the comparison of fuzzy controller with the conventional PID controller. Then we analyze the effects of scaling factor using this approximate transfer function and root locus method.

열병합 발전설비가 포함된 전력계통의 경제급전 : 수리적 모델 Mathematical Model

김학만,신명철 成均館大學校 科學技術硏究所 1996 論文集 Vol.47 No.1

The weight of cogenerators in power system has increased as an electrical power source. The mathematical model of cogenerators should include exact characteristics of cogenerators to achieve an economic dispatch of power systems. A unique characteristic of cogenerators is that cogenerators produce both of the electrical energy and thermal energy. Naturally, the electrical and thermal energy must be considered for an efficient operation of cogenerators. To accomplish the economic dispatch of power system using cogenerators, we must inspect two key factors; the first one is that the relationship between electrical and thermal energy production. The other factor is a correlation between supply and demand of thermal energy. Aiming at the economic dispatch of power system, we propose a new mathematical model that reflects the previously mentioned key factors.

유연구조 퍼지추론 및 비퍼지화

이철희,서선학,Yager, R. 강원대학교 정보통신연구소 1997 정보통신논문지 Vol.1 No.-

In this paper, we suggest a new approach having the flexibility to the problem of fuzzy inference and defuzzification. For fuzzy inference, we observe the fact that it consists of three parts; the determination of firing level of each rule, the determination of degree of coupling between antecedent and consequent of a rule, and the aggregation of all rules. So we soften the paradigm of Mamdani's fuzzy inference model by using S-OWA operators. Also, for defuzzification, we introduced a combinability function to help to more intelligently guide the difuzzification process. And then, we treat it as a kind of clustering problem and apply the basic idea used in the mountain clustering method. The proposed method includes Mamdani's fuzzy inference model and center of gravity method as a special case, and it has the flexibility.

단백질 상호작용 추출을 위한 텍스트 마이닝 기법

이현철,여은주,조완섭,김학용,유재수 충북대학교 컴퓨터정보통신 연구소 2004 컴퓨터정보통신연구 Vol.12 No.1

단백질 간의 상호작용에 대한 연구는 생물학적 프로세스를 이해하기 위해 중요한 부분이다. 이 논문의 목적은 생물학적 내용을 담고 있는 연구논문으로부터 단백질간의 상호작용을 추출하는 확장성을 가진 텍스트 마이닝 기법을 제안하는데 있다. 단백질 간의 상호작용에 대한 정보는 주로 생명과학 관련 연구논문에 존재하지만 컴퓨터로 자동으로 처리하여 상호작용에 관한 정보를 추출할 수 있기 위해서는 텍스트 마이닝 기술이 적용되어야 한다. 바이오 텍스트 마이닝에서 대두되고 있는 중요한 쟁점은 대용량의 연구논문에서 필요한 정보를 어떻게 효율적으로 정확하게 추출할 것인가에 대한 내용이다. 또한, 관심이 있는 단백질의 종류나 상호작용에 대한 관련성을 나타내는 문장내 패턴의 다양성을 수용하기 위하여 시스템의 확장성을 높이는 것도 소프트웨어 공학적인 측면에서 중요한 이슈이다. The research for protein-protein interactions remains an important part to understand the biological process. This paper suggests a text mining technique with extensibility, which extracts the protein-protein interaction from the biological research papers. There is much information related to the protein-protein interactions in plentiful biological research papers, we need the text-mining technique to extract the protein-protein interaction information automatically and rapidly. The main issue in bio-textming lays how to extract the necessary information efficiently and correctly. In addition, it is a significant issue to accommodate the concerned kinds of proteins and the diversity patterns in sentences with the relevance about protein-protein interactions in order to increase system extendibility in aspect of software engineering.

백서에서 신 허혈성 손상에 미치는 칼슘 길항제의 효과

문철웅,정종훈,박천국,이승일,배학연,장경식,김만우,정춘해,홍순표,이병래,김호중 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Renal ischemia is one of the most common causes of acute renal failure. Four factors related to the pathogenesis of acute renal failure are vasoconstriction, decreased glomerular filtration rate, tubular back leak of filtrate, and intratubular obstruction. The cellular response to renal ischemic insults include decreased content of adenosine trihosphate, lipid peroxidation induced membrane degradation, alteration in cellular pH, and calcium or phospholipase induced mitochondrial dysfunction. Much attention has been given to the role of increased cellular calcium as a pathogenetic contributor to cell injury during ischemia. Author studied the protective effects of calcium antagonists on cellular injury during renal ischemia in rat. To investigate the protective role of these agents, author measured the amount of malondialdehyde(MDA) and the enzyme activities of free radical scarvengers-superoxide dismutase(SOD), catalase and glutathione peroxidase from non-pretreated group and calcium antagonists pretreated groups in control, ischemia and reflow subgroups. The results were summerized as follows: 1) The amount of MDA in non-pretreated group was higher in the reflow compared with the control(<p<0.01). But, in all pretreated groups, there was no statistically difference in the amount of MDA. 2) The SOD activity in non-pretreated group was lower in both the ischemia and the reflow compared with the control (P<0.05). But, in both verapamil and trifluoperazine-pretreated groups, there was no statistically difference in the SOD activity. 3) Both catalase and glutathione peroxidase activities in non-pretreated group were lower in both the ischemia and the reflow compared with the control (P<0.05). But in all pretreated groups, there was no statically difference in both catalase and glutathione peroxidase activities. These results suggest that free radical mediated ischemic injury by renal artery clamp in rat can be protected by intraperitoneal pretreatment with calcium antagonists. As trifluoperazine has a protective effect in renal ischemia, the calcium activated calmodulin dependent enzyme may play a role in renal ischemic injury.

제주도 호텔의 건축계획적 특성에 관한 연구

김학진,박철민 제주대학교 공과대학 첨단기술연구소 2003 尖端技術硏究所論文集 Vol.14 No.1

In order to overcome such limits of hotel sales, the role of hotel public section, such as eating and drinking facilities, is very important. Moreover, city hotels increase the value of public section by providing various event for citizens as well as and services for banquet. Since Jeju has urban hotels and resort hotels mixed together, their plane types and area composition based on the characters of customers using the public section are different from ones of other cities. The purpose of this study is to provide basic material for the quality improvement of the luxury resort hotels in Jeju. We examine the tendency of the systematic plane composition of the public sections which take different types of customers, such as Jeju people and tourists, into consideration, analyzing the plane types and the area composition of the luxury resort hotels in Jeju. The study shows that the public part of hotels always had great impact on hotels sales depending on the compositions of plane and area.

小員環 化合物에 關한 硏究 : Li-Bistosylhydrazone의 熱分解 生成物에 關하여 Products of the Lithium Fumaraldehyde Bistosylhydrazone Pyrolysis

李學沂,林龍進,沈相喆 경북대학교 공과대학 1971 工大硏究誌 Vol.1 No.-

The pyrolysis of dry lithiun salt of fumaraldehyde tosylhydrazone which was prepared by reacting fumaraldehyde and tosylhydrazine was studied. The products of therm a decomposition, acetylene, ethytlene and unidentified gaseous substances, were separated by GC to learn the ratio of the products which was variable according to the reaction conditions. The investigaton of the path route to form acetylene, ethylene and unidentified compounds remains for further work to learn the mechanism of tetrahedrane formation.

大學生의 學業成就와 諸 情意的 變因과의 相關硏究

韓宗哲,李學柱 울산대학교 1981 연구논문집 Vol.12 No.1

敎育은 人間 行動을 變化시키는 一連의 組織的 過程이다. 따라서 敎育의 過程을 通하여 變化된 知的 行動과 여러 情意的 要因과의 關係를 分析的으로 評價하는 일은 敎育 專門家에 주어진 重要 課題中의 하나다. 本 硏究에서는 1)敎育課程의 中核的 目標인 大學生들의 學業成就度와 情意的 側面인 自我槪念 및 知覺向性과의 關係 把握과 2)大學에서의 한 敎科의 學業成就度와 이들의 自我槪念 및 知覺向性 要因과의 相關關係는 統計的으로 意義가 없었다. 卽 學生들의 自我槪念이나 知覺向性은 이들의 學業成就度를 거의 豫言하지 못하고 있다. 단지 女子 集團의 경우 學業成就度와 知覺向性의 下位要因인 '自身에 대한 知覺'間에 統計的으로 매우 意義있는(1%수준) 相關關係를 보이고 있어, 學業成就度에 미치는 情意的 變因에 있어 男·女 學生集團 間에 差異가 있음을 알 수 있다. 그리고, 大學의 總 學點 平均點數는 한 敎科에 대한 成就度 變量의 約 62%만을 豫言할 수 밖에 없는 것으로 나타났다. 이것은 大學에 있어 學生들의 各 敎科에 대한 學點의 可變性을 말해 주는 것으로, 大學生들의 한 敎科에 대한 學業成就度에는 他 敎科에 대한 知的 能力(知識) 以外의 다른 情意的 要因이 크게 影響을 주는 것으로 보아야 할 것이다. It is one of the most well-recognized facts that the improvement of educational practices is closely tied with the possibility of innovation in educational evaluation itself and the evauation of improvements in student ability is one of the most important subjects in education. The first major problem for the future of education is to find wary and means of multiplying the measurable dimensions of academic achievement. Though there have been many attempts to measure student achievement, to diagnose learning difficulties and to verify affecting variables of student achievement, they have not been as fruitful as one might expect. Therefore, it is necessary that academic achievement, representing a highly specialized knowledge and higher mental abilities, is measured by affective traits. Purposes of the study Two major purposes were identified for the present study, 1) To verify the corrlation between the score of achievement test and self-concept, perceptual orientation. 2) To verify the correlation between the score of achievement test and the grade point average(G.P.A) at the college. Methods Among the instruments used in this study, and achievement test, standardized "Self Concept Inventory" and "Perceptual Orientation Scale" were used by the researchers. The subjects of this study were 190 students enrolled in "School and Community" courses of Yonsei University during the first academic semester, 1979. The procedures are as follows: the collecting of data on the achievement and psychological tests, and the treatment of the data by analysing them according to simple correlation, t-test, and analysis of variances. Major findings 1) The variables on the self concept and perceptual orientation were not related with the acievement test. But, the perception of other person as a sub-factor of "Perceptual Orientation Scale" proved statistically significant in females(1% level). 2) Generally, correlation between the score on the achievement test and the G.P.A was low(0.62). But correalation between the G.P.A.'s of freshmen and sophomores was high(1% level).