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        Building Extraction and 3D Modeling from Airborne Laser Scanning Data

        이정호,유기윤,한수희,변영기,김용일 대한원격탐사학회 2007 大韓遠隔探査學會誌 Vol.23 No.5

        The demand for more accurate and realistic 3D urban models has been increasing more and more. Many studies have been conducted to extract 3D features from remote sensing data such as satellite images, aerial photos, and airborne laser scanning data. In this paper a technique is presented to extract and reconstruct 3D buildings in urban areas using airborne laser scanning data. Firstly all points in a building were divided into some groups by height difference. From segmented laser scanning data of irregularly distributed points we generalized and regularized building boundaries which better approximate the real boundaries. Then the roof points which are subject to the same groups were classified using pre-defined models by least squares fitting. Finally all parameters of the roof surfaces were determined and 3D building models were constructed. Some buildings with complex shapes were selected to test our presented algorithms. The results showed that proposed approach has good potential for reconstructing complex buildings in detail using only airborne laser scanning data.

      • 제조업체의 환경, 전략, 그리고 성과에 관한 연구

        이정호,류춘호 한국경영학회 2007 한국경영학회 통합학술발표논문집 Vol.2007 No.8

        본 연구는 제조업체의 조합적 경쟁역량의 개념을 경쟁환경에 대하여 조작화하여 이를 측정할 수 있는 모형을 개발하고, 조합적 경쟁역량의 사업성과에 대한 영향력을 분석함으로써 제조업체가 경쟁환경에 적합한 경쟁역량을 획득할 수 있는 대안적 방법을 제시하는 것이다. 이를 위해 본 연구는 기초적 이론의 고찰을 기반으로 제조업체의 조합적 경쟁역량의 개념을 조작적으로 정의할 수 있는 가설의 설정과 더불어 조합적 경쟁역량이 사업성과에 어느 정도의 영향력을 지니는지, 그리고 조합적 경쟁역량이 경쟁환경에 대응하여 사업성과를 유도하는 방법은 무엇인지에 관한 가설들을 설정한 후, 이들을 표본으로 선정된 1 차 자료를 이용함으로써 실증적으로 검정하였다. 본 연구의 분석결과는 제조업체가 현재의 역량을 활용하고 미래의 기회를 탐색함으로써 개별적으로 선택되고 제한되는 경쟁역량들을 동시에 누적시킬 수 있으며 이를 통해 제조업체가 각각의 개별 경쟁역량들 조합시킬 수 있음을 보여준다. This study is to conceptualize the notion of combinative capability in manufacturing firms and to examine relationships among competitive environment, combinative capability, and business performance. Drawing on literature streams in operations strategy and organizational learning, this study develops and tests the constructs and operational measures of combinative capability of manufacturers and models the nomological set of relationships among constructs that form the basis of our theory. Using data from 170 operational managers, this study tests for effects of combinative capability on product quality, delivery speed, process flexibility, and price leadership and for effects of combinative capability on business performance. This research concludes that combinative capability can be viewed as an accumulation of individual capabilities that manufacturing firms can simultaneously improve and strengthen. This study points out in an alternative way that these combinative capabilities can be acquired.

      • 附加價値稅에 關한 硏究

        李廷鎬 慶北大學校 經商大學 經濟學科 1976 慶商大學論集 Vol.4 No.-

        This paper attempts to investigate various problems of the value-added tax system by analizing its economical effects, which will eventually help the government and enterprises with their making of policy about tax affars. The principle of the value-added tax is based on the benefit theory. This implies that all the businesses protected by the government are obliged to pay tax according to the added-value whether they get profits or suffer a loss. Form this point of view, it is incorrect to argue that the new tax system is contradictory because it will require even the deficit business to have the duty to pay taxes. The most ideal form of value-added tax system for korea is the consumption type. For this type can simplify the decision tax standard by means of the subtraction of expenditure paid to other enterprises form the gross earnings. When the value-added tax is levied according to the invoice method(or the tax from tax method), the tax burden will be shifted to the consumers, even if the tax payers are the business owners. And the wage earners will eventually bear a greater burden of taxes. when the consumption type is introduced at single tariff, the resource allocation will become neutral. But it will turn out to be unfavorable to the low-income classes due to the retroaction of the tax burden. Those against the value-added tax stress this point. In order to alleviate the tendency of retroaction of tax burden, a special consumption tax ought to be imposed on the luxurious articles on the one hand, and no tax should be levied on the livelihood expenditures on the other. This, however, in turn do some damage to the neutrality of resource allocation to tome extent. In view of the reasonably fair allocation of national resources, some exceptional cases in tax policy may be expected for the preservation of manpower resources or material resources. Furthermore, the presumptive subtraction methed, when properly adopted for the sake of small and medium enterprises or agricultural businesses, will help mitigate the retroaction of the tax burden. The antagonists fear that the value-added tax system will cause the price-hike. This is true only when the value-added tax is introduced as a new tax. On the other hand, it is a general viewpoint that when it replaces the current indirect taxes and aims at the same government revenue as the present one, the price level hike will be prevented. However, the changes in relative price will be inevitable, which will apprehensively be accompanied by a partial price-hike being taken a ride in the changes. In order to aboid this phenomenon, either the price-hike prevention act may be put in force or an abequate fiscal policy should be worked out. Speaking of the export, the adoption of zero rate will help prompt it because the previous taxes may be completely refunded. When the taxes on the import goods are well balanced, the balance of international payment will be improved as if we had a rise in exchange rate. It is also to be noted that adoption of consumption type will subtract the previous tax and shift the tax burden to the consumers. Consequently the Korean economy will get better due to the restriction on Consumption and sivings and investment will be promoted. In addition medernization of facilities will be realized through the immediate subtraction of tax for the investment. Even if an excessive investment and hot prosperity arise, they may be controled for the sake of economical stability by adjusting the subtraction rate. Besides, a elastic tax rate may be applied to the value-added tax as an effective weapon of fiscal policy. In the final analysis, we may take up the merits of those in favor of the value-added tax system or we may compensate the shortcomings of those against it. It solely depends on how we adjust the tax system to our national environment. In this regard, the value-added tax system may be recommendable. If an excessive high rate of tax is imposed even at the outset, the value-added tax will dentroy the merits and increase its demerits. It is true that a better social welfare requires righer government revenue. Therefore we can not but largely depent on the value-added tax for expanding the exemption of income tax and correcting the imbalance of income distribution which is likely to expand as the national economical situation improves. Accoridngly if we properly control the progressive rate of tax burden and develop the social security system the value-added tax may eventually cause the increment of the government revenue.

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