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국민학교 1,2,3학년 산수 교과서에 나타난 언어 진술형 덧셈 및 뺄셈 문제의 분석
劉承求 한국교육학회 대구·경북지회 1989 교육학논총 Vol.8 No.-
The purposes of this study were to identify the frequencies and diversities of word problem type in Korean elementary arithemetic textbooks of grade 1,2, and 3 and to suggest the improvement of textbook contents by comparing the frequency and presentation of word problems in Korean text with those in American and Soviet ones indirectly. The general findings are as follows. (1) AH the word problems in grade 1,2, and 3 texts were 148, and relatively few. (2) The word problems were relatively easy to solve and simple and not diverse. (3) It is similar to Soviet text that the word problems are distributed across units, and it is similar to American texts that word problems are easy to solve and not diverse. The recommandations are as follows. (1) The effects of the characteristics of text such as presentation sequence on children's learning processes and performance are required to be studied further. (2) Korean arithmetic texts are requested to contain diverse types of word problems regarding semantic structures. (3) In extra-cirricular learning and books, the word problem types not present in texts are requested to be presented. (4) Teachers in grade 1,2 and 3 should present word problems diversely to have children to take discriminating skills.
유승구,권대훈 안동대학 학생지도연구소 1989 學生指導硏究 Vol.9 No.1
Multidimensional self-esteem scale, need for approval scale and interpersonal orientation scale were administered to college students to examine the relationship between self-esteem and need for approval. The correlation coefficients of self- esteem with need for approval was .26. The correlation coefficients of sub-factors with need for approval were ranged from. 07 to.31. These coefficients were positive, but weak and unstable. Thus, it seems that self-esteem and for approval are treated as independent constructs. The students were divided into 4 groups by self-esteem mean score and need for approval mean score, and analyzed to identify the difference of each in self-reported GPA and interpersonal orientation score. The results indicated that high self-esteem/low need for approval group and high self-esteem/high need for approval group were significantly different in GPA score and interpersonal orientation score, but that low self-esteem groups were not. The findings were discussed in comparisons with previous studies.
펩타이드-Intergrase 융합 단백질의 재조합 활성
이나영,유승구 연세대학교 산업기술연구소 1996 논문집 Vol.28 No.2
Pepetide-Integrase fusion protein containing 17 additional amino acids at the amino terminal of bacteriophage Lambda Integrase was used for in vitro recombination assay and was found to have full recombination activity just as wild type Integrase. This result suggests the possibility that Integrase recombination system can be used to develop a novel peptide library system in which random peptides are displayed by DNA bound Integrase.
유승구 연세대학교 산업기술연구소 1994 논문집 Vol.26 No.2
Phosphocellulose column chromatography was performed in order to purify PRD1 DNA polymerase and terminal protein. In vitro replication assay with PRD1 natural template for each fraction showed a sole, sharp peak. The presence of PRD1 DNA polymerase and terminal protein in the peak fraction was confirmed by initiation complex formation assay. These results indicate that the PRD1 DNA polymerase and terminal protein are copurified from the crude cell extract by phosphocellulose column chromatography.
Plasmid DNA pBR 322의 증폭과 Hydroxyapatite Chromatography에 의한 분리
오두환,유주현,신원철,정건섭,유승구 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.1
The amplification and the isolation conditions of pBR322 plasmid DNA were investigated. For the amplification of pBR322 plasmid DNA, cells from logarithmic growth phase were most effective. The optimal conditions for the amplification of pBR322 plasmid DNA in Escherichia coli GM4 were obtained as follows; 50-150 ㎍/ml of chloramphenicol concentration, 6-8 hours of incubation time in the presence of chloramphenicol. Ampicillin and tetracycline had no effect on the amplification of pBR322 plasmid DNA. Approximately 1 mg of pBR322 plasmid DNA was purified from 3.5 ℓof Escherichia coli GM4 culture broth by hydroxyapatite chromatography. The purified pBR322 plasmid DNA was expressed in Escherichia coli C600.
柳承九 한국의사결정학회 1993 경영과학연구 Vol.2 No.-
This study is created to establish an optimum control model of quality costs(hence, QCs), and to represent the method of administering the QCs economically by evaluating and applying the very model in automobile parts companies. It is necessary that we increase the expenditure of prevention cost and decrease the failure cost so that we can reduce TC, when we compare the result of this analysis with the optimum quality cost control model of this study. This study has come to construct the optimum control model in which TC is objectively quantified by control cost as a decision variable. Consequently, the following function can be derived at : Let's designate failure cost 'F(F-EF+IF)', control cost 'K(K=A+P)', total quality cost "TC", and the mean value of F'E(F)'. Then, we can formulate a mathmatical function:'TC-K+a/K', in which TC is regarded as a dependent variable, and, control cost as a decision variable. In-order to determine a value:'K', so that we can render TC its lowest terms, we get the minimum control cost 'K=a', in which TC is differentiated by K. Therefore, the minimum TC becomes "TC=2√a'. According to the analysis of this study, it is established that the control cost must controled intention-ally for the reducing of total quality costs in the Korean parts business. Farther we can reduce failure cost by managing control cost s a decision variable efficiently and intentionally through the application of the derived optimum quality cost control model, diminish TC with the very model, and verify the usefulness of the model.