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오정환,서영란,이명현,이병일,김재정,김영규 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
Cu electrodeposition has been used for making the electrical circuits for various electronic devices like microvia in printed circuit board (PCB), damascene features, and Through Silicon Via (TSV). Organic additives play an important role for defect-free filling and above all additives, levelers enable to obtain perfect gap-filling of Cu by electrodeposition in case of relatively large size like microvia in PCB and TSV for 3-dimensional packaging. In this study, we have synthesized various ethylene glycol based levelers by changing alkly chain and the functional groups. The electrochemical properties were analyzed by Linear Sweep Voltammetry (LSV) and filling results of the synthesized levelers on microvia are reported. Finally, we suggested that the quaternary ammonium group and the ethylene oxy functional groups were crucial for the improved filling performance.
吳政換 경기대학교 호텔경영연구소 1992 호텔경영연구논총 Vol.- No.1
It is true that the on tourism is in itself so boundless that there has been a wide difference in its objects and research methods. However, since so far studies in this special field have been primarily made from the economic and social point of view, today, the need for a scientific research on hotel business seems to be becoming more and more acute to meet the increasing demand for international tourism as a whole. In this study I have a comparative study on the course of shift in accommodations from the angle of social science and history. But no one denys that the hotel business in tourist industry has proved to be the most viable business in that it excells others in profit, the acquisition of foreign exchanges, the effect of the increase in employment, and the outstanding contribution to the promotion and dissemination of social culture. Also seen from the management's viewpoint, the hotel industry is so effective in increasing fixed assets that today it has come to play a decisive role in the promotion of service industry. For this reason, today the lodging industry has come to be called the second important business in human history. Since there was no any historical record to be found before the emergence of modern hotels as a large-scale enterprise, to say nothing of any theoretical researches on the process of transition in hotel management, this study seems to be valuable as well as meaningful. Especially in Korea, the conception of hotel seems to have been derived from Western civilzation, and it is only since the late nineteenth century that with Korea's open-door policy, a few hotels such as Daebul Hotel, Sontag Hotel, and Station Hotel, have come into being for the first time in Korea even under the Japanese colonial rule. Since, especially in the range of the study of tourism, the historical form of study can be directly assembled into the history of tourism or hotel management, I have suggested in this study a historical method of research including the history of hotel management in tourism in general as a basic subsidiary science of the general theory of tourism. Finally, I can only that future students of hotel management may derive some little help from my labours. And it is my earnest desire to thank the writers for the invaluable information and suggestions accorded to me this study.
오정환 경기대학교 호텔경영연구소 1997 호텔경영연구논총 Vol.- No.5
It is true that the international conference business in this era of internationalization and globalization is expected to grow continuously because of its high value-added economic effect and the opportunity to enhance the national prestige abroad. And with the rapid development of technology and electronics, the conference halls will be equipped with the up-to-date electronic equipments and facilities, and that the chairs in the conference room will also become so comfortable and comfortable and convenient that the attendants at the meeting will not at all become tried or bored during the meeting no matter how long it conference continues. Also to be noted is the fact that since the international participants at the meetings come to Korea only through airlines, it is necessary to reduced their air fares and hotel charges. But there seems to be international conferences to be held here in Korea where the participants are invited with reduces cost or often free of charge because of our traditional customs to treat foreigners hospitable and heartily. The government and public organizations to sponsor the international conference or meeting tend to demand some economic and social sacrifice from the hotel and conference hall. And it is also necessary to invite the international conferences and group tours based on the principles of demand and supply regardless of private interests. It is very important for the government and public organizations to make every effort to invite as many small and large international conferences as possible at the turn of the 21st century. And it is also necessary for the government to try to provide economic benefits for the hotels and public organizations so that they are able to repair, change, and extend their old and outdated facilities and structures. It is also desirable for the large conglomerates, the government and public organizations to try to promote the construction of conference halls. In an attempt to promote nation's international conference business, the Ministry of Culture and Sports has earmarked 500 billion won as its promotion funds for the international conferences to be held here in Korea in 1997. The promotion funds from the government will be used in advancing the funds for the establishment of the international conference facilities and mending, in advancing and aiding the funds for the construction of the foundation facilities for the international conferences, in aiding and advancing the funds needed to invite and hold the international conference, in assisting the research funds for the promotion of the international conference business, and in paying the expenses necessary for the management and use of the foundation.