http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
전현배 ( Hyun Bae Chun ),오승연 ( Seung Yeon Oh ) 서강대학교 시장경제연구소(구 서강대학교 경제연구소) 2012 시장경제연구 Vol.41 No.1
본 연구는 외국인의 국내기업 소유결정요인으로 수직적 산업연관성의 역할에 대하여 실증분석을 실시한다. 2007년도 기업활동조사자료를 이용한 분석결과는 국내기업 소유 자회사에 비해서 외국인 소유 자회사는 모기업이 속한 산업에 중간재를 공급하는 수직 연관된 산업에 속할 확률이 높은 것으로 나타났다. 특히, 외국인 모회사와 한국과의 거리가 멀어질수록 수직적 산업연관성이 더욱 높은 것으로 나타났다. 이러한 결과는 외국인 기업은 국내기업에 비해 상대적으로 높은 국내시장에 대한 적응비용을 줄이기 위해 수직적 결합을 선택했을 가능성을 보여준다. The paper examines the role of vertical linkage in determining foreign ownership. Using the 2007 Survey of Business Stature and Activity, our empirical analysis shows that foreign-owned firms are more likely to supply intermediate inputs to the industry of their parent firms than domestically- owned firm. Vertical linkage becomes stronger as the geographic distance between foreign-owned firms and their parent firms increases. The result suggests that foreign parent firms might choose vertical integration to reduce adjustment costs in accessing the Korean market.
불소의 농도와 Seed Material이 Crystal Growth에 미치는 영향
오승연,정일영,금기연,이찬영 大韓齒科保存學會 1997 Restorative Dentistry & Endodontics Vol.22 No.2
The present study was undertaken to investigate the crystal growth onto human enamel mineral and synthetic hydroxyapatite(HA) seeds in media resembling the enamel fluid composition. Effects of fluoride at high concentrations on the precipitation were also examined in a bench-top crystal growth model adopting a miniaturized reaction column. The Ca, P and F concentrations and pH values of the inlet and outlet solutions were determined. The recovered solid samples were weighed to assess the amount of minerals precipitated during the experimental period, and finally viewed under a scanning electron microscope. Remarkable findings were that 1) both biological and synthetic seeds with the same total surface areas yielded similar amounts of crystal growth, 2) the amount of crystal growth was accelerated in a manner depending of fluoride concentrations in the media, 3) SEM observations disclosed that without the addition of fluoride, precipitation of thin, plate-like OCP crystals became prominent, but by increasing the fluoride concentration(beyond 1ppm F), rod-like crystals having a pointed edge were most frequently observed, without and evidence for precipitation of the plate-like crystals. Furthermore, the dimension of rod-like crystals was increased in proportion of fluoride concentrations, 4) there was no difference in the morphological feature of precipitated mineral phase upon seeding between human enamel seed and synthetic HA seed. The overall results support the view that the seeded crystal growth model is of value to gain insight into the mechanism of enamel crystal growth under fluoride regimens.