돼지설사 원인균 E. coli의 생육저해에 대한 유산균의 효과

姜國熙,成文喜,方泰瑛,龍球淵,林讚洙 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.1

E. coli A_2 diarrhea causing bacteria of pigs was anaerobically inoculated with 10^5/ml into prereduced YS medium (10% reconstituted skim milk+0.1% yeast extract), and then lactic acid bacteria were inoculated with 10^5/ml and 10^7ml into previous inoculated samples of E. coli A_2. Inoculated samples cultured at 37℃, were tested to determine changes in viable numbers of organisms and pH. The experimental results are summerized as follows: 1. In the mixed culture medium of 10^5/ml E. coli A_2 and L. casei YIT9018, E. coli A_2 decreased after 36 hours from incubation. 2. In the mixed culture medium of 10^5/ml E. coli A_2 and L. acidophilus, E. coli A_2 drastically decreased after 24 hours from incubation and was almost disappeared after 72 hours from incubation. 3. In the mixed culture medium of 10^5/ml E. coli A_2 and L. bulgaricus, E. coif A_2 drastically decreased after 24 hours from incubation and was almost disappeared after 72 hours from incubation. 4. In the mixed culture medium of 10^5/ml E. coli A_2 and Str. thermophilus, E. coli A_2 decreased after 12 hours from incubation. 5. When the pH value of the mixed culture, was, 4. 5 below, E. coli A_2 decreased.

공작 기계의 신뢰성 평가를 위한 웹 기반 해석 프로그램 개발

강태한,김봉석,이수훈,송준엽,강재훈 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

Web-based analysis programs for reliability assessment of machine tools were developed in this study. First, the reliability data analysis program was developed to search for failure rate using failure data and reliability test data of mechanical part. Second, failure mode analysis was developed through performance tests like circular movement test vibration test for machine tools. This analysis program shows correlation between failure mode and performance test result. Third, tool life was predicted by correlation between flank wear and cutting time, using the extended Taylor tool life equation in turning data and the equivalently converted equation in order to apply ball endmill data to Taylor tool life equation in milling data. All the information related to input and result data can be stored in theses programs.

고속 채널환경에 강건한 OFDM 시스템을 위한 채널추정기법

강연석,황태욱,최준철,김영수 경희-다반 ASIC 설계교육센터 2004 경희-다반 ASIC센터 논문집 Vol.5 No.-

본 논문에서는 Orhogonal Frequency Division Multiplexting(OFMB) 시스템의 성능 향상을 위해 파일럿 심볼을 이용한 향상된 채널추정 알고리즘을 제안한다 기존의 LMMSE 알고리즘을 이용한 채널 추정 방법은 파일럿 심볼만을 채널 추정에 이용함으로써 파일럿 간격이 멀어짐에 따라 성능이 현저하게 떨어지는 단점이 있다. 이런 문제를 해결하기 위해 파일럿 사이의 채널을 선 추정하고 이 추정된 값을 다시 파일럿과 함께 이용하여 채널을 추정하는 채널추정기법을 제안하였다. 제안된 추정기법은 도플러 주파수를 36Hz애서 185Hz인 페이딩 채널환경에 적용했다. 기존의 LMMSE 추정기법과 비교했을 때 특히 큰 도플러 주파수애 대해 강건한 특성을 보였다.

유자 과피를 이용한 oleoresin 제조 및 항산화 활성

강동수,배태진 麗水大學校 産業基術硏究所 1999 産業基術硏究所 論文集 Vol.8 No.-

As a way of mass process for citron peel, the extracting conditions of oleoresin concentrated the original flavor and taste, such as kind of solvents, particle sizes of a sample, sample to solvent ratios, extracting temperatures and times, were studied. Among eight solvents used for oleoresin extraction from citron peel, the optimal solvent was ethyl alcohol. The most appropriate particle size of citron peel powder, extracting temperature and mixing ratio of citron peel to ethyl alcohol were 20 mesh, 40℃ and 1 to 8 (w/v), respectively. The basis of yield in oleoresin extraction, optimum extracting time ws about 2 hours. The yield of oleoresin under the above-mentioned conditions was 28.7%. When the induced heating-oxidize with soy bean oil and sesame oil added 0.8% of oleoresin citron peel, induction-time extension effect appeared antioxidant activity that was applicable for 83.6~86.0% about effection of addition of 0.02% BHA.

삼상 순환 유동층 생물반응기에서 열전달 계수

강태규,송평섭,최길수,조용준,강용,최호석,김상돈 한국화학공학회 2002 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.40 No.5

직경이 0.102m이고 높이가 1.0m인 기체-액체 순환 및 삼상 순환유동층 생물반응기의 상승관에서 열전달 특성을 고찰하였다. 기체 및 액체의 유속 그리고 생물막 담체의 체류량이 상승관 내부의 수직 열원과 반응기 사이의 열전달 계수에 미치는 영향을 결정하였다. 기체-액체 순환 반응기에서 열전달 계수는 기체의 유속이 증가함에 따라 증가하였으나 액체 유속의 증가에 따라서는 약간 증가하였다. 삼상 순환유동층 생물반응기에서 열전달 계수는 기체의 유속과 유동 생물막 매체의 체류량이 증가함에 따라 증가하였으나 액체의 유속이 증가함에 따라서는 약간 증가하였다. 본 연구의 실험 범위에서 이들 열전달 계수는 실험 조작 변수의 상관식으로 잘 나타낼 수 있었다. Heat transfer characteristics have been investigated in the riser of gas-liquid circulation and three-phase circulating fluidized-bed bioreactors whose diameter and height are 0.102m and 1.0m, respectively. Effects of gas and liquid velocities and holdup of fluidized biofilm media on the heat transfer coefficient between the immersed vertical heater and the bed have been determined. The heat transfer coefficient in the gas-liquid circulation reactor increases with increasing gas velocity, but increases only slightly with increasing liquid velocity. The h(heat transfer coefficient) value in the three-phase circulating fluidized-bed bioreactor also increases with increasing gas velocity or holdup of fluidized biofilm media, but it increases only slightly with liquid velocity. The value of heat transfer coefficient has been well correlated in terms of operating variables.

제주마의 모색빈도에 관한 연구

강민수,정창조,강태숙,정재준 제주대학교 농과대학 제주도축산문제연구소 1988 畜産論叢 Vol.3 No.1

The coat color records of 210 Cheju Island pony were analyzed to examine if the frequency is independent of sex. In Chelu Island pony the frequencies of chestnut color were 35.7 and 39.7 percent respectively in the male and female, and those of bay color were 21.4 and 31.6 percent respectively. Other colors(black, fallow, piebald)tended to be more frequent in the female than in the male. The Chi-square tests for the sex x coat color table showed that the sex differences were significant.

객체지향 방법론을 이용한 자동차부품기업의 영업관리시스템 설계 및 구현

강성배,문태수 한국정보시스템학회 2004 情報시스템硏究 Vol.13 No.1

According to the increase of organizational complexity and the change of rapid information technology environment, many firms have shifted their information technology(IT) strategy from developing information systems in-house to purchasing application software such as Enterprise Resource Planning(ERP) Systems. Marketing and Sales functions within a Korean automotive part company include developing new assembly products, determining pricing, taking customer's orders, and shipping assembly products to customers. Marketing and Sales Information System(MSIS) in ERP system plays an important role in next Production Planning process. MSIS also makes management reporting and decision making faster and more uniform throughout an organization. MSIS promotes thinking about corporate goals, as opposed to thinking only about the goals of a single department or functional area. This paper intends to design and implement a MSIS in ERP systems for Korean automotive part company using object-oriented methodology. In order to accomplish the implementation of MSIS in ERP system, we employed UML as its standard modeling language. In this study, four diagramming techniques such as use case diagram, sequence diagram, class diagram, component diagram among eight modeling techniques are used for analyzing hierarchical business process. In traditional marketing and sales function, a company with an unintegrated information system can have marketing and sales data that is data redundant or inaccurate. MSIS integrated in ERP system can solve the sales forecast problem, which minimizes the total costs of production, inventory, and transportation under constraints of production capacity. Also, the use of UIVIL methodology makes S/W programmers shorten the phase of analysis and design in the implementation of MSIS system, and increase the reuse of software and the interoperability with corporate internal information system.

번들블럭조정법을 이용한 관측값의 해석

강태석,차관수 청주대학교 사회과학연구소 1992 한국사회과학연구 Vol.11 No.-

It is widly known that the improvements of highly accurate and dense control networks are major requirements to carry out a large scale mapping for numerical cadastral surveying. This study tries to present a improved method for aerial triangulation as a way to guarantee the accuracy of numerical cadastral photogrammetry. To subtanciate the study, a sample test block is selected to compare the accuracy of ground surveying and other photogrammetric methods. The result of this study can be summarized as follows : To begin with, the positon errors of proposed bundle adjustment with gross error detection for single models are proved for better accuracy then Direct Linear Transformation or Self-Calibration Bundle Adjustment. And also, in Block Adjustment, the Bundle Block Adjustment gets better results to compare with the Independent Model Adjustment. Thus, it is suggestive that the Bundle Block Adjustment would be an efficient device for the numerical cadastral surveying in futher time.

방송산업과 저작권

강태영,최양수,김영석 연세대학교 언론연구소 1992 언론 사회 문화 Vol.- No.2

자연산 및 양식산 농어의 영양성분 비교

강동수,배태진,하봉석 여수대학교 1998 論文集 Vol.12 No.2

The differences in the contents of nutritive components of meat were examined between wild and cultured sea bass. Total amino acid contents of the wild sea bass were higher than that of the cultured one. The main amino acids in the both sea bass were glutamic acid, aspartic acid, leucine and lysine. The wild sea bass contained higher amounts of glycine than in the cultured sea bass. Total free amino acid contents of the cultured sea bass were higher than that of the wild one. In composition of free amino acid, taurine was abundant, and glutamic acid, glycine, alanine and histidine were the major free amino acids. The contents of glycine, alanine and histidine in the wild fish were higher than those in the cultured one, while the content of taurine was lower. In the contents of nucleotides and their related compounds, IMP was dominant, and followed ADP, AMP, in order. The contents of nucleotides and their related compounds in the cultured sea bass were markedly lower than that of the wild sea bass. In fatty acid composition, C16:0, C18:1, C22:6, C16:1 and C20:5 fatty acids were abundant. The wild sea bass showed higher levels in C16:1 and C18:1 fatty acids than the cultured sea bass, while the cultured sea bass contained much amont of C22:6 fatty acid.