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Kang, Tae June,Kim, Jeong-Gil,Lee, Ho-Young,Lee, Jae-Sang,Lee, Jae-Hyung,Hahn, Jun-Hee,Kim, Yong Hyup 한국정밀공학회 2014 International Journal of Precision Engineering and Vol.15 No.5
Aluminum (Al) thin films are used widely as an electronic material in a variety of applications because of their high conductivity, optical reflectance and low cost. In the present study, helium (He) and nitrogen (N2) ions were implanted in sputter-deposited Al thin films with different doses and energies, and the changes in the film properties, such as the surface roughness, optical reflectance, hardness and Young's modulus, were investigated. The results showed that the implantation of both ions smooth the surface of Al thin films by decreasing the hillock density, resulting in low global surface roughness. In particular, in the case of He ion implantation, the moderated degradation of optical reflectance was observed compared to the film implanted with nitrogen ion. On the other hand, excessive ion implantation increased the local (short-range) surface roughness, which deteriorated the optical reflectance of the Al films. The continuous stiffness measurement technique in nano-indentation showed that ion implantation increased the hardness near the surface. He ion implantation hardened the surface of the Al thin film, and almost 2 times higher surface hardness was achieved with an ion dose of $10^{18}ions/cm^2$ at 40 KeV.
Pull-out test에 의해 형성된 리드프레임/EMC 계면의 파손경로에 대한 형성과정 해석
이호영,박영배,전인수,김용협 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.3
Two types of copper-oxide layers were formed on the surface of a copper-based leadframe sheets by immersing them in two kinds of hot alkaline solutions. The oxide-coated leadframe sheets were molded with EMC (Epoxy Molding Compound), and the molded bodies were machined to form pull-out specimens for the purpose of measuring the adhesion strength between oxide-coated leadframe and EMC. After the pull-out tests, fracture surfaces were analyzed using various techniques to find out the failure loci, and subsequently, finite element modeling was carried out to simulate failure loci forming process. The results revealed that phase angle is a main factor affecting failure locus. Local phase angle changes resulted in locally different failure loci. (Received November 26, 2004)
李英俠 건국대학교 1977 學術誌 Vol.21 No.1
The contents of this treatise are composed of analyzing the Farm Land Reform in the underdeveloped countries after World War II , examining the scheme of government which plans to improve the reformation executed in 1950 into the new system, and suggesting the writer's new system.
劉永祥,南全姬,李相協 東國大學校 敎育問題硏究所 1988 교육문제연구 Vol.5 No.-
The modernization of industry structure is rendered to increase the woman's employment. The rate of woman's employment has been rapidly growing in Korea ever since the 1960's industrialization. The enormous number of highly educated woman has been raised while they have little took part in the social activities. It became a new problem of the society. This study, therefore, aims at analysing the female collegians employment consciousness and their career readiness situation in order to develop a program to guide the career course for the girl students of Universities in Korea. The three conceptions of questionaires were designed to investigate the famale students' employment consciousness ; That is, career consciousness, sex role and environmental factor. Such two methods as the O'Neil's Career Factor Check List, and the Spence and Helmerich's Attitudes Towards Women Scale (AWS) were used to recognize them. For a week, the rashly collected 900 girl students at Dong-Guk Univ were sampled, and then 817 responses of them were selected to analyse. χ²-test and one-way ANOVA were carried out to grasp the general characteristics over the matters. At first, the majority of female collegians (97.4%) hoped to get a job. Most of them (77.6%) put more emphasis on marriage than on work. It causes employers to consider that women graduated from the Universities are not progressive either rational. Neither do they get a job easily, nor do they deliberate future, aptitude, and major when they get to work. We can also discover the female collegians' career consciousness is influenced by the attitude toward sex role. Now that the distorted social general idea on the woman employment influences career consciousness, they are being discorded psychologically. This study shows a couple of condusions as followings ; First, no wonder most of female collegians hope to work. Bust the fixed social situation unchanged frustrates many girl students and prevents them from being employed. Secondly, they do not have the obvious and subjective career consciousness. So, they ought to be leaded to a steady and slow preparation for the employment. In order to do so, the college authorities are needed to give students the special or culture lectures in advance. Finally, every kinds of public offices, companies or constitutions have to increase the employment rates of capable women graduated and establish more public day nurseries so that they can manage both marriage and work. Moreover, the introduction to employment by the hour, the prevention of the sex distinction and labor surroundings improvement should be realized as soon as possible.
한동협,송영렬 경원전문대학 1999 論文集 Vol.21 No.-
This article has the goal to restructure the korea bank. To perform this purpose, we have the empirical test of the employees of banks. The result indicates that the concrete goal should be proposed, a lot of employees are fired and a lot of conflicts are presented.
한동협,송영렬 경원전문대학 2001 論文集 Vol.23 No.-
Business ethics management in globalization is important element of the competitiveness. And ethical behavior is doing the right things more than the law. In this circumstances, this study intends to inspect business ethics in Korea, Japan and USA corporations and suggest desirable business ethics. The summaries of the study are as follows: First, corporation must establish management strategy for enforcement of business ethics. Second, managers must recognize business ethics as added value of the corporation. Third, corporation must make code of business ethics. And managers must control the practice.
2.25Cr-1Mo강의 미소 피로균열의 발생 및 성장 거동
이상협,최영근,김상태 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.1
Initiation and propagation behavior of short fatigue cracks in 2.25Cr-1Mo steel was studied under load control at room temperature in order to investigate the relation between cyclic condition and crack behavior. Replica method was used to detect the initiation and the growth of surface short cracks continuously. The length and the density of small cracks distributed irregularly on the surface was analysed by the statistical method to calculate the fatigue damage and predict the fatigue life.