김치유래 젖산균의 균체지방산 분석을 이용한 분류학적 연구

이정숙,정민철,김우식,이근철,김홍중,박찬선,이헌주,주윤정,이근종,안종석,박완,박용하,민태익 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.2

표준균주를 포함한 230여개의 김치유래 젖산균에 대한 균체지방산(FAMEs)을 분석하였다. FAMEs profiles는 Euclidian Distance 17.5에 의해 7개의 Major Cluster와 1개의 Single Cluster로 나뉘어졌다. 이중 A, B, C 및 Cluster는 Leuconostoc속으로 분석되어졌고, F는 Lactobacillus속으로 분석되어졌다. 그리고 E와 G cluster는 두개의 Genus가 혼재되어 나타났으며 보충적인 연구가 필요하다. 앞으로 김치유래 젖산균의 균체지방산 분석결과를 기반으로 한 데이타베이스에 95가지 탄소원을 이용하는 수치분류학적 접근방법 및 Pyrolysis Mass Spectrometry 등의 화학적 분석 방법과 분자친화적 연구를 통한 종합적 분류정보 체계가 갖추어지면 젖산균의 신속, 정확한 동정 및 연구에 활발히 이용되어질 것이다. Two hundreds and thirty lactic acid bacteria, mostly isolated from Kimchi, including type strains were sued for analysis of cellular fatty acids. The 230 test strains were recoverd in 7 major and 1 single clusters defined a Euclidian distance of 17.5. These aggregate taxa were equivalent to the genus Leuconostoc (aggregate group A, B, C and D), and the genera Leuconostoc and Lactobacillus (aggregate group G). It is concluded as evident that FAMEs (Fatty Acid Methyl Esters) profile of cell can be used as a criterion in classification of lactic acid bacterial from kimchi. Additional comparative taxonomic studies need to be carried out on well chosen representative strains to determine the most appropriate methods of value.

화상 신호를 이용한 금속표면의 미소 결함 측정에 관한 연구

이주상,윤여권,김희남 明知大學校 産業技術硏究所 1993 産業技術硏究所論文集 Vol.12 No.-

This paper reports a method of measuring surface scratch using microscope and CCD. Included are both the theory of the technique and experimental verification. The range of surface scratch which can be accurately measured by this method is also reported. The nature of this method it is anticipated that the effective automatic testing and sorting can be possible for precision machining work.

사회봉사활동 교육과정 운영 연구

이동규,이영춘,조주연 서울敎育大學校 學生生活硏究所 1998 學生生活硏究 Vol.24 No.-

This study is a base research on which the Seoul National University of Education implements the subject of 'Social Service Activities' as part of the formal curriculum. The purpose of this study was to suggest a systematic program for the curriculum implementation. The major research methods of this study were the analysis of precedent literature regarding Social Service Actities, and the interview method. As the research results, this study presents the discussion products regarding the concept·characteristics·contents of social service activites, the present situation of service activites in Korea and other countries, the preparation/attitude of university students who are going to practise those activites. As far as the concrete curriculum implementation is concerned, this study suggests twofold specific ideas. First, this study presents ideas on the curriculum form such as regarding in which semeter the subject is open, how students apply for the subjects, how to designate advising professors, what is the role of the professors, how to evaluate the activity results of students, and how to select the relevant institutions in which the activities are carried out. Second, this study suggests to construct an curriculum implementation committee and to make a implementaion guide. The committee is supposed to carry out manage/control the social service curriculum, and consider important matters on the curriculum impletation.

전침 자극에 의한 오디 괄약근 운동성 변화에 관한 연구

이성구,김명완,김홍자,서동환,이상수,김동일,유교상,주연호,민병일,김지훈 경희대학교 동서의학연구소 2001 東西醫學硏究所 論文集 Vol.2000 No.-

Background/Aims: This study was designed to evaluated the effects of electroacupuncture on the sphincter of Oddi (SO) motility in humans and to correlate the manometric findings with plasma cholecystokinin (CCK) levels. Methods: Eleven patients (M: F= 5: 6) who had various kinds of biliary disorders were enrolled. SO motility was monitored with a conventional low-compliant continuously perfused technique using ERCP (n=9) or percutaneous transhepatic cholangioscope (n=2). After baseline monitoring for phasic wave contractions of SO, electroacupuncture was applied at a specific acupoint, GB 34, in these 11 patients. A nonspecific acupoint 5 cm away from GB 34 was selected as a control. Manometric parameters of SO were also checked in 6 subjects during stimulation of the control acupoint. CCK plasma levels were measured during the time course of electroacupuncture stimulation. Result: All the manometric parameters including the basal pressure of SO, amplitude, frequency and duration of phasic wave contraction of SO were significantly decreased (p< 0.05) during electroacupuncture stimulation. The inhibition of SO contractility was accompanied by increased CCK plasma levels. After removal of electroacupuncture stimulation, restoration of amplitude and duration to basal condition were noted. A tendency towards the return of SO contractility was also observed in basal pressure and frequency. Stimulation of the control acupoint, however, did not affect the SO contractility and plasma CCK levels. Conclusions: Electroacupuncture stimulation of acupoint GB 34 showed reversible inhibition of SO contraction in humans. We speculate that the response of SO to electroacupuncture stimulation may be mediated by some neurohormonal mechanisms including CCK release. (Korean Journal of Gastrointestinal Motility 2000;6:44-41)

교육대학생의 스트레스 요인 연구

이영희,조주연,방인태 서울敎育大學校 學生生活硏究所 1998 學生生活硏究 Vol.24 No.-

The purpose of this study was to analyze the stress factors which students at the Universities of Education have. Especially, after developing 'The stress-measurement scale for the students at the Universities of Education', this study identified the stress patterns and perception level on each stress factor of students of the Seoul National Univ. of Education. As a theoretical background, this study discussed researches on meaning of stress, concept/patterns/results of stress, and ways to cope with stress. Some results of this study are: First, the major domain in which students experience the highest level of stress is the domain of individual level, especially regarding personality. Female students experience the more degree of stress than male students do regarding this domain. Second, several stress domains which show high degree of relationship(higher than 60) with each other are domains of ① physical environments and study/work load, ②study/work load and study/work skills, ③ friendship and communication skills, ④ personality characteristics and self-confidence, ⑤ ways of thinking and value system, and ⑥ communication skill and study/work skill. Third, several variables which exert influence on the stress level of students at the Seoul National University of Education are variables on gender, army service experience, and academic year.

대용량 음성 인식을 위한 Parser 연구

이주헌,박윤건,권영헌,이건상,양성일 한양대학교 이학기술연구소 2004 이학기술연구지 Vol.7 No.

본 논문에서는 대용량 연속음성 인식에서 시스템의 성능 향상을 위해 음성인식 후처리 과정 중 구문분석을 위한 파서(Parser)를 구현하였다. 과싱(Parsing)을 위한 문법으로는 자유 어순의 언어인 한국어 특성에 적합한 '중심어 주도 구구조 문법(HPSG)을 사용하였으며, 한국어의 문장에 대한 구조적 측면에서 서술어의 형식과 성질에 따른 결합 문행을 제시하였다. 현태소 분석을 위한 인식엔진으로는 한양대학교 제어계측공학과 ROSP 연구실, 물리학과 음향학 연구실(FSL)에서 개발한 '한양 한국어 형태소 분석기(H2MA)'의 엔진을 사용하였다. 실험을 위해 문형에 따른 문장과 합성 동사문을 포함한 총 110여 문장이 사용되었다. 실험 결과 이중 주어문과 합성 동사문 을 포함한 단문의 경우 91.82%의 인식률을 얻었다. In this paper, we construct Parser for sentence analysis in order to improve performance of Large-vocabulary continuous speech recognition system. We use HPSG which is suitable for Korean of its partially-free word order characteristics, as a grammar for Parsing. We propose a combination of sentence pattern and characteristic of predicate in structural for Korean sentence. As recognition engine for Morpheme analysis, we use H2MA developed by ROSP laboratory and FSL laboratory in Hanyang University. As a result, we obtain the recognition rate 91.82% about short sentences including double subjects and synthesize verb sentences.

퍼지 환경하에서 유연생산시스템 일정계획의 Pairwise 해법에 관한 연구

이상완,신대혁,윤연근,박병주 동아대학교 공과대학부설 생산기술연구소 1996 生産技術硏究所硏究論文集 Vol.1 No.2

FMS(Flexible Manufacturing System) scheduling problem is a complex system and a NP-hard problem. Thus it is natural to look for heuristic method. Here, we consider the multi-part production scheduling problem in a FMS scheduring of altemative routings. The problem in more complex if the processing time is imprecision. It requires suitable method to deal with imprecision. Fuzzy set theory can be useful in modeling and solving scheduling problems with uncertain processing times. Lee-Ki fuzzy number comparison method will be used to compare processing times that evaluated under fuzziness. This study propose heuristic algorithm solving FMS scheduling problem under fuzzy environment. In this algorithm, the pairwise comparision method is used to find proper alternative routing. On the basis of the proposed method, and example in presented.

플라이애쉬를 혼입한 콘크리트포장의 배합특성에 관한 실험적 연구

이주형,최성용,윤경구,정영화 江原大學校 産業技術硏究所 1997 産業技術硏究 Vol.17 No.-

As the weight of trucks increases, the need for concrete pavement also increases. Therefore, the addition of fly-ash may improve the properties of pavement concrete as well as recycle fly-ash. A full factorial experiment was performed using the primary variables, such as water-cement ratio, fly-ash substitution ratio, and maximum size of coarse aggregate, as a preliminary study for optimum mixture design for pavement concrete. The results of preliminary study indicates that the addition of fly-ash is the most important factor determining concrete strength, followed by the maximum size of coarse aggregate and water-cement ratio. It, also, shows the relative importance of fly-ash substitution ratio, compared to the water-cement ratio, and the interaction effects between the primary variables. Optimum mixture designs for pavement concrete incorporating fly-ash, that satisfied the target responses, were proposed in terms of fly-ash substitution ratio, water cement ratio and maximum size of coarse aggregate.

라텍스 개질 콘크리트의 강도발현 및 내구특성

윤경구,홍창우,이주형,이종명 강원대학교 석재복합신소재제품연구센터 2001 석재연 논문집 Vol.6 No.-

본 연구는 라텍스 혼입률이 5%, 10%, 15%, 20%로 변화할 때 라텍스 개질 콘크리트의 내구 특성을 평가하는데 있다. 라텍스를 콘크리트에 혼입한 라텍스 개질 콘크리트는 보통 콘크리트의 색상과 성형성, 작업성를 갖으며, 약 20%~35%의 단위수향이 감소된다. 그리고 양생후, 콘크리트는 시멘트수화물과 라텍스 입자의 필름막에 의해 연결된 골재로 구성된다. 일반적으로 라텍스 양이 증가하면 콘크리트의 휨강도는 증가하는데, 이것은 라텍스가 시멘트 수화물과 골재사이의 점착력을 증가시키기 때문으로 판단된다. 라텍스 개질 콘크리트와 보통콘크리트와의 상대투수성을 측정하기 위하여 염소이온투과시험법을 사용하였다. 그 결과 라텍스 개질 콘크리트의 투수성은 보통콘크리트의 투수성보다 매우 낮음을 알 수 있었다. 이것은 라텍스가 미세공극을 충진하고 라텍스 입자의 필름막에 의해 골재와 시멘트수화물이 연결 때문이다. 또한 라텍스가 공극주위로 필름막을 형성하기 때문에 공기량이 투수성에 영향을 미치지 못한다는 것을 알 수 있었다. 보통콘크리트에서는 동결융해저항성을 증가시키기 위해 공기연행제를 필요로 하지만, 라텍스 개질 콘크리트에서는 적절한 양생이 이루어지면 추가적인 공기연행제는 요구되지 않는다. 또한 라텍스 혼입률이 증가함에 따라 추가적인 동결융해저항성의 증가는 나타나지 않았다. This study focused on the investigation of strength development and durability of latex modified concrete(LMC) as the latex content variated such as 5%, 10%, 15%, and 20%. When latex was added to concrete, the workability of LMC was quietly increased, compared to that of conventional concrete. This resulted in the decrease of the required water as 20% to 35% in order to obtain a same slump. In general, increasing the amount of latex decreased compressive strength a little but increased flexural strength quite a lot. This might be due to interconnection by a film of latex particles between hydrated cement and aggregates. This, also, might attribute to bonding between the hydrated cement and aggregates. The rapid chloride permeability test was used to evaluate the relative permeability of latex-modified concretes and conventional concretes. The results showed that the permeability of latex-modified concretes was considerably lower than that of conventional concretes tested, which might be due to the latex filled in voids and interconnections of hydrated cement and aggregates by a film of latex particles. Because of latex formed film surrounding the air void, air contents and voids does not effect to the permeability of latex modified concrete.

철근콘크리트 커플링 보의 해석기법과 병렬 전단벽의 거동 비교

이주화,박완신,윤현도 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

Ductile coupled flexural walls are the primary seismic load resisting systems of many structures. The coupling beams of these structures must exhibit excellent ductility and energy absorption ability. But the present analytical method about nonlinear behavior of reinforced concrete coupling beam scarcely anything. This paper composed of two subjects. First subject is a suggestion of analytical method of diagonally reinforced concrete coupling beam and longitudinally reinforced concrete coupling beam and rhombic coupling beam, and selected 5 specimens for that. Second subject is a comparison of seismic behavior of fully coupled shear wall and partially coupled shear wall. This paper used lDAHC-2D and Midas Gen 4.3.1 for the purpose of achievement these subjects. Suggested analytical method expected that it showed good agreement with reinforced concrete coupling beam inelastic behavior. Also, comparison of seismic behavior result showed that fully coupled shear wall have good behavior than partially coupled shear wall.