http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 이석태 (검색결과 2,296 건)
- 무료
- 기관 내 무료
- 유료
-
-
이석태 한국항해항만학회 1998 한국항만학회논문집 Vol.9 No.-
The evaluation of port competition could be applied to determining the selection of a calling port. A few fundemental attributes of port competition were adapted by the 'brian storming'method. The criteria used for evaluating a port's competitiveness were as follows : efficiency of port operations, competitive power of each port's industry, economic activity of the hinderland associated with each port and capability of globalization. The weight of each criterion was 30%, 40%, 20% & 10%, respectively. And the most important factors that were considered in choosing each of the above criteria were profitability, port information system, cargo volume & inducement of foreign capital. The results of this study seemed to suggest that factors which influence port competition varied according to port circumstances, such as computer and communication systems and access to the global trade within the World Trade Organization.
-
-
이석태 한국유통정보학회 2000 유통정보학회지 Vol.3 No.1
This study aims at enhancing the international industrial competitiveness of business entities in the Kunsan area by improving its logistical information system, one of the port's major systems of logistics management. The Kunsan port handled only 1.2% of Korean international sea cargo in 1997. This low figure is partly caused by unfavourable natural conditions, such as tidal differences and continuing mud collapse. However, the development of a major port in the west-south area of Korea is inevitable because of the rapid economic development of China, which is bringing active trading with our country. Kunsan port is one of the major trading ports in Chun-Book province, located in the west-south area or the Korean peninsular. Therefore, new development plans for the Kun-Jang port stated in 1990 and will progress until 2011. After the successful completion of this project, Kun-Jang port will be equipped with 66 berths and will be able to handle 35.23 million tons of cargo annually. Because of the heavy cost required in developing this infrastructure, however, each investment plan must be carefully examined before implementation. For the efficiency of any port, a logistical information system which coordinates each sub-system of cargo flow in the port is essential. Successful port productivity can only be realized by the balanced operation of each sub-system, i. e. ocean transportation, navigational aids, cargo handling, storage, and inland transportation systems. The logistical information system with its computer and information communication can easily improve the port's productivity. In this study, I suggest some ideas of a logistical information system for the efficient, cost-effective flow, storage, and cargo handling of commodities and services from point of origin to point of destination, in accordance with customer requirements. First, the information infrastructure of hardware and software should be widely expanded. This is because Kunsan and its vicinity will become the center of logistics in west-south part of Korea, with sea, air and land transport terminals and large distribution centers. Secondly, a logistical information system should provide integrated information encompassing different logistical sub systems and affairs of related organizations. Logistics systems are composed of sea, rail, trucking and air transportation, storage, cargo, customs, and financial systems. For this, a logistical information system should provide various logistical database services for users' needs. Thirdly, logistical information users must be encouraged to use the logistical information system. This ca b realized by developing a user-friendly information system. Fourthly, a logistical information system, including a port logistical information system, should be connected internationally by a communication system, because the purpose of logistics is efficient flow from point of origin to point of destination. Fifthly, a logistical information system should be constructed in such a way as to be able to provide logistical systemization and solutions for efficiency of logistics in a total logistical system. Lastly, the spread of a logistical information system should be supported by lawful aids, such as a communication protocol and standardization of EDI. Future studies are required to develop methods to improve present logistical information systems by technological innovation.
-
-
-
-
-
베테-살피터 파동함수의 동력학적 대칭성깨짐에 대한 기여
이석태 한국물리학회 2002 새물리 Vol.44 No.4
베테-살피터 파동함수는 복합입자의 파동함수 계산을 위한 비섭동론적 방법의 하나이다. 그러나 이 파동함수는 페르미온이나 게이지입자의 루프계산에 등장하여 전파함수에 영향을 준다. 특히 게이지입자인 경우에는 일차루프에 파동함수가 작용하여 대칭성을 깰 수 있다. 본논문에서는 사다리꼴 근사범위내에서 페르미온-반페르미온의 구속상태인 $f {\bar f}$의 파동함수를 베테-살피터 방정식을 이용하여 검토하고 대칭성 깨짐 여부를 알아보고자 한다. The bethe-Salpeter wave function is one of the non-perturbation methods for bound--state wave--function calculations. These wave functions can appear in the loop calculation of fermion and gauge particles and affect the propagators. Especially, in the case of gauge particles, the bound wave function appearing on the 1st loop can break the symmetry. This article checks the possibility of symmetry breaking by the Bethe-Salpeter wave function within the ladder approximation and shows how each propagator is algebraically related to the calculation.
-
Algorithms for Anisotropic and Bianisotropic Maxwell’s Equations in Unbounded Media
이석태,Ilyoung Lee 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.5
The Fourier transform and the matrix representation of Maxwell’s inhomogeneous equations allow an analytic approach to the field calculation in an anisotropic or a bianisotropic medium. The coupling problem between E and H is resolved naturally after the vector differential equations are changed to algebraic equations by using Fourier transform. The Fourier transformed tensor Green’s functions (propagators) are also obtained algebraically in the wave vector k-space from the matrix equations, and these solutions turn out to be equivalent to the results from the traditional wave equations.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
