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Ettema, R.,윤병만 明知大學校 産業技術硏究所 1996 産業技術硏究所論文集 Vol.15 No.-
본 논문에서는 우리나라에서는 생소한 분야인 atmospheric icing에 관한 외국의 연구동향에 대해 정리하여 놓았다. Icing의 종류 및 특성, 형성원리, 수치모형, 각 국의 icing 하중에 대한 설계기준들에 대해 언급하였다. 또한 기존 연구의 한계점을 분석하고 앞으로의 연구방향을 제시하였다.
Gustavo G. Manzato,Theo A. Arentze,Harry J. P. Timmermans,Dick Ettema 서울시립대학교 도시과학연구원 2010 도시과학국제저널 Vol.14 No.1
This paper addresses an exploratory study about the mediated influence of a set of location and accessibility attributes along with firm types and the effect on office firm closures. We use a proportional hazard modeling approach, examining the probability that an office firm will go out of business in any given year, conditional on the fact that it did not go out of business in the years prior. Variables include urbanization levels and regional effects; accessibility to airports, train stations, shopping centers and the roadway network; availability of parking facilities and schools; demographic and economic aspects; effects of agglomeration economies; rent price; and the type of economic activity of the office firm. Most of them presented significant information to assist in the explanation of the firm closure. Also, interaction effects between covariates and firm types brought a better understanding about the firm closure patterns in relation to urban characteristics. Assessing firm closures is an element of a firm demographic approach and overall dynamics. In turn, this is part of a multiagent system to simulate the co-evolution of firm dynamics and changes in activity-travel patterns.