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Eigenvalues of Non-Sylvester Hadamard Matrices Constructed by Monomial Permutation Matrices
이승래,노종선,성굉모,Lee Seung-Rae,No Jong-Seon,Sung Koeng-Mo The Korean Institute of Communications and Informa 2006 韓國通信學會論文誌 Vol.31 No.4c
본 논문에서는 단항순열행렬에 의해 구성된 다양한 비실베스터 하다마드 행렬의 고유치가 유도 되었고 이는, 새로 구성한 행렬과 실베스트 하다마드 행렬의 고유치와의 연관성을 보여준다. In this paper, the eigenvalues of various non-Sylvester Hadamard matrices constructed by monomial permutation matrices are derived, which shows the relation between the eigenvalues of the newly constructed matrix and Sylvester Hadamard matrix.
이승래(Seung Rae Lee) 한국수산경영학회 1993 수산경영론집 Vol.24 No.1
In this paper, fishery economics is reviewed to extend a basic opportunity for developing new fishery economics and to evaluate the effects of the import liberalization on the fish trade structure of Korea. The principle outline of extensions emphasis to realize the modern fishery problems based on fishery economics and develop the practical methodology in order to analyze the impacts of the import liberalization on the fishery and fishermen welfare. During the process of export-oriented industrilization, the role and position of fishery in the economy is changed dynamically. When faced with the imperative of the role and position of fishery in the economy, fishery economists and domestic policy makers must decide how to organize themselves for solving fishery problems under the new regime in the import liberalization on the fish trade. Fishery problems impacted by the new regime can not be solved by fishery itself but be solved by the centralized efforts of all contributors in national views. Therefore the new systematic analytical methodology must be develop and the traditional fishery economics must be related to the regional development strategy and fishery sociology as subsidiary theories specialized. Due to the impacts of the import liberalization on the fish trade structure, fishery economists face with radical changes in the domestic fishery : a place of the resources harvest to place of the combination resource harvest and its demand, a fishing as a resource exploitation to a fishing as a resource management, a traditional small scale costal fishing to a modernized and scaled fishing, fishery using the given natural resource itself to fishery as technology intensive industry, and a food supply industry to a welfare indusry based on the regional and economic resource and social environment. As these changes, fishery and its community`s regional and economic resource and social environments as multiple roles of the regional economic development are emphasized in fishery economics under the new regime in the import liberalization on the fish trade. Furthermore, domestic policy makers and administrators in a public sector must realize the above radical changing trends in fishery and understand a social and economic environment in fishery and develop a new fishery structure facusing on the fishing system and the fishery laws. As this point, they make efforts to improve and develop fishery as a food supply industry. Japan, for example, has a non - governmental organization to conflict the problem of international fishery such as a movement of a civil environmental protection. Also fishermen in Japan already realized conservation and pollution problems in fishing as fundamental issues of human being. In focusing on these realizations, fishery economists and organizations must emphasize a role of education and information in structuring public sector collective relationships in fishery. Alao they cope with difficulty of the import liberalization on the fish trade positively and this difficulty takes into account after due a consideration of conserving domestic resources and fish consumers. Generally, the effects of the import liberalization of agriculture products has dampening effects on the production and farm income through reduction of prices of farm products in the domestic market. The impact of complete liberalization of farm products seems serious. But these effects on the fish trade are differ from that of agriculture and may enhance domestic fishery including a costal fishery, an inshore fishery and a deep - sea fishery in long run if this difficulty is solved by a centralization of the fishery resource management responsibility in professional skills, specialized knowledge, quick access to relevant data, and quantities of time and energy. Such a pinpointing of fishery resource management responsibility for difficulty of the import liberalization on the fish trade reconstructs a domestic fishery strongly. Fina
이승래 ( Seung Rae Lee ),김혁황 ( Hyuk Hwang Kim ),이준원 ( Joun Won Lee ) 한국국제통상학회 2015 국제통상연구 Vol.20 No.2
본 연구는 2003~2011년간 KOSPI와 KOSDAQ에 상장되어 있는 제조업체의 기업 패널 데이터를 사용하여 기업 R&D 투자가 기업의 생산성, 수출 및 해외직접투자(FDI)에 미치는 영향에 대해 실증 분석하였다. R&D 투자효과의 심도 깊은 분석을 위해 본 연구에서는 새로운 상품을 개발하거나 상품의 질을 상승시키는 제품혁신형 R&D와 기존의 동일한 상품을 보다 효율적으로 생산하여 생산비용을 감소시키는 공정혁신형 R&D가 수출과 FDI에 미치는 영향에 대해 분석하였다. 이와 같이 다른 성격을 지니고 있는 R&D 투자효과를 분석하기 위해 기업생산성을 매개 변수로 설정한 재귀적 구조방정식 모형을 사용하여 기업의 R&D 투자가 수출 및 FDI에 미치는 직접적인 효과(제품혁신)와 생산성 변화를 통한 간접효과(공정혁신)를 분석하였다. 기업생산성을 총요소 생산성으로 추정하여 분석한 결과 기업의 R&D 투자는 직접적으로 수출과 FDI 증가에 미치는 효과가 큰 것으로 나타나 제품혁신형 R&D가 공정혁신형 R&D보다 큰 효과를 보이는 것으로 분석되었다. 또한 기업을 자본집약적 및 노동집약적 산업으로 구분하여 분석한 결과 R&D 투자는 자본집약적인 산업에서 직간접적으로 수출과 FDI를 증가시키는 것으로 나타난 반면 노동집약적인 산업에서는 노동생산성 증가를 통해 간접적으로 수출을 증가시키는 것으로 분석되었다. This paper examines the effects of firm R&D on exports and foreign direct investment (FDI) by using Korean firm data. To provide in-depth analysis on R&D effects, we estimate the effects of technical innovation R&D and production process R&D by using recursive structural equation model. Taking into account that technical innovation is associated with product-specific quality, while production process innovation affects firm-specific productivity, we use firm productivity as a mediator variable to estimate the effects of firm R&D with and without incorporating firm productivity in the model. Our results show that firm R&D is more effective on increasing exports and FDI directly than indirectly through firm productivity change. Estimating firm R&D effects across different industry sectors, we find that firm R&D has significant impact on exports and FDI directly and indirectly through total factor productivity change among capital-intensive sectors, while it has significant effects on exports through labor productivity change insidelabor-intensive sectors. Our results provide evidence that while technical innovation R&D is more effective on improving foreign market performance, different types of R&D activities have different effects depending on industry characteristics.