Chemical bonding states and atomic distribution within Zn(S,O) film prepared on CIGS/Mo/glass substrates by chemical bath deposition

K. Ahn,J.H. Jeon,정세영,김종만,H.S. Ahn,J. P. Kim,E.D. Jeong,조채용 한국물리학회 2012 Current Applied Physics Vol.12 No.6

Zn(S,O) thin films fabricated on CIGS/Mo/glass substrates by using chemical bath deposition (CBD) in acidic and basic solutions were studied. The Zn(S,O) thin films prepared in acidic solution [A-Zn(S,O) thin film] showed better crystallinity and a more compact surface morphology with larger grains than those prepared in basic solution [B-Zn(S,O) thin film] did. From the analysis of the chemical bonding states, at the initial growth step, the concentration ratio of ZneO/ZneS bonds in A-Zn(S,O) thin films was found to be approximately zero, while that in B-Zn(S,O) thin films was approximately equal to 1. The elemental distribution according to depth, determined by secondary ion mass spectroscopy (SIMS), was shown to be uniform throughout both the A- and B-Zn(S,O) thin films. To reduce the number of ZneO bonds in the B-Zn(S,O) thin films, the samples were post-annealed at up to 300 ℃ under vacuum, after which the concentration ratio of ZneO/ZneS bonds decreased by about 71% without any change in the crystallinity or surface morphology.

Anti-inflammatory Activities for the Extracts and Carpinontriols from Branches of Carpinus turczaninowii

Ko, H.N.,Oh, T.-H.,Baik, J.S.,Hyun, C.-G.,Kim, S.S.,Lee, N.H. ANSINET PUBLICATIONS 2013 International journal of pharmacology Vol.9 No.2

첫 0 電話番號檢出器의 設計

李健一 경북대학교 공과대학 1976 工大硏究誌 Vol.5 No.-

A simple and high reliable first 0 telephone number detector is designed to control the DDD telephone system.

線路直結 첫 0 電話다이얼펄스檢出器의 設計

李健一 경북대학교 공과대학 1977 工大硏究誌 Vol.6 No.-

A high reliable line connected first 0 telephone dial pulses dector has been designed with CMOS integrated circuits to control the DDD telephone system.

電源直結 SCR直流安定化 電源의 改善

李建一,崔文奭 慶北大學校 1976 論文集 Vol.22 No.-

A low cost and dfficient trasformer-less SCR regulator has been developed on the basis of J.Hicks and A.Hopengarten's circuit by the method of replacing the dc feedback circuit with an ac feedback circuit. The improved circuit can also work in full-wave instead of their half-wave operation. A simple constant voltage circuit employing the avalanche diode has been added for the reference voltage. The regulated dc output voltage range has been from 15 to 80 volts for the current up to about 1.5 amperes and its line regulation can be good as one percent over the range from 15 to 40 volts.

교육분화체제와 사회불평등

李建滿 서원대학교 교육연구소 1994 敎育發展 Vol.13 No.1

1.Problems Curriculum tracking has been viewed as one of the educational mechanism for selecting and socializing students to disparate roles. The dual school system of secondary education, which is made up of the general high schools and vocational high schools, has permitted schools to differentiate their curricula as well as to sort and socialize students to different occupational roles. Given this, an evaluation of the role curriculum tracing plays in structuring conditions of distributing students into positions in the social division of labor requires discussions of whether and to what extent academic differentiation in high schools relate to the existing class structure, prospect for labor market, and social mobility. 2.Purpose The study aimed at not only exploring the actul characteristics of student served by two different types of high school, but also identifying some of the consequences of academic differentiation by eamining the relationship of curriculum tracking to educational and occupational aspirations of the students. In addition, the syudy also attempted to discover the association of curriculum tracking with students, attitudes toward social inequality by investigating the degree of acceptance of social reward system resulting from education. 3.methods The data for this study were collected from a questionnaire survey. The sample comprised 32 classes from 8 achools. A total of 1396 students responses were analysed in this syudy. The data were analysed by utilizing Crosstabulation, Two, Three, Four-Way ANOVA,Multiple Discriminant analysis, and Multiple Classification Analysis. 4.Results The major findings in this study could be summarized as follows: First, students from affluent homes were most likely to be found in the general high schools, while students with poor family backgrounds were most likely to be found in the vocational high schools, regardless of their academic performance level. Second, students who attend the same type of school shared a common set of expectations about their future career, regardless of their social class origin and present academin performance level. Third, students in the vocational high schools and those with poor academic performance in the general high schools expressed negative attitudes in accepting the legitimacy of social reward system attributable to education.

韓國 高等敎育 變遷 小考

李建滿 서원대학교 교육연구소 1982 敎育發展 Vol.2 No.1

Higher Education is indeed being buffeted by change in society on every side. During the Japanese colonial times, It was very hard to have higher learning and to establish the institution of higher education. But in spite of the severe restriction and oppression of higher education by Japanese colonial government, our people had burning desire for having higher learning. Since the restoration of our country, colleges and universities have established and these institutions have been playing an important role as the public education institutions, but their development has been in quantity but not in quality. Institutions of higher learning are in crisis because society has altered, and intensified its demands on their capacities to fulfill their fuctions. With understanding of the transition of higher education on our country, the purpose of this study is to understand the direction of reformation on higher education which have been proceeded since 1970's.

出力電壓과 內部抵抗의 可變이 서로 獨立的인 內部抵抗可變 直流安定化電源

李健一 경북대학교 공과대학 1977 工大硏究誌 Vol.6 No.-

In this work, we have designed dc regulated power supply with variable internal resistance where output open circuit voltage and internal resistance are independently varied each other. The electrical characteristics observed in this power supply can be outlined as following: 1) Internal resistance can be varied equivalently in wide ranges from 0.2 to 500 ohms, 2) practically no vriation (within 0.02 percent per volt) is observed in output open circuit voltage when the internal resistance is varied, and 3) practically no variation (within 0.05 percent per ohm) is observed in internal resistance when the output open circuit voltage is varied.

대학생의 사회적ㆍ정치적 현실인식과 정치적 행동에 관한 연구

李建滿,金琪正 서원대학교 교육연구소 1992 敎育發展 Vol.11 No.1

In recent years there have been several studies on student movement and some of the work has been contributed to the understanding of the sources of student movement from the point of view of the socio-economic structure of Korean Society. Yet, scant progress has been made in identifying the actual characteristics of the activists, the degree of radicalism, and the extent of participation in movement activities. The objectives of this study are (1) to investigate the degree of radicalism and political attitudes of college students, (2) to examine the effects of media contact on the formation of radicalism and political attitudes, and (3) to develop an explanation of the relationship between individual background, media contact, radicalism, political attitudes, and participation in movement activities. Drawing upon a questionnaire survey administered in several classes to 1434 students at eight universities, empirical tests of the research problems are performed by utilizing Oneway Analysis of variance, Multiple Cassification Analysis, Correlation, and Multiple Regression Analysis. The major findings of this study can be summarized as follows: First, male students are much more likely to have frequent contacts with media than female students, in the fields of humanities, social sciences or engineering are much more interested in political knowledge and news than those in the areas of arts or education, and there are little differences in media contacts among respondents by socio-economic status. Second, most of the respondents show moderate radical views of socio-political realities, and specifically students from a lower SES background, who have lower grades, and are in the humanities or social science fields are more likely to hold radical views. Third, there emeges no differences in political attitudes among respondents by sex, grades, academic performance, and SES. But most students in this sample have negative sense of political efficacy and political trust. Students in humanities or social sciences are more likely to show this tendency compared as those in arts. Fourth, even though most of the respondents hold radical views and have negative political attitudes, they are not involved actively in the movement activities. Fifth, a significant association between media contacts and radicalism, political attitudes, political behavior is observed. Sixth, radicalism maintains the strongest effect of political behavior and the weakest is SES. Evidence indicates the importance of radicalism and negative political attitudes as major sources of predicting the likelihood of participation in movement activities.

沃泰化合物 Thermistor의 製造에 關한 硏究

李健一,李德東 慶北大學校 1975 論文集 Vol.20 No.-

(Ag_xCu_(1-x))_2HgI_4 (0≤x≤1) CTR thermistors were fabricated and their electrical characteristics were investigated. The x-dependent critical temperatures were in the range of (45∼75)℃. The x=0.9 samples gave the highest resistance anomaly index, 3.