• Korean Management Science Review
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• v.27 no.1
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• pp.1-16
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• 2010

According to appearance of a new competitive factor, as 'Green', Green Logistics becomes the important evaluation factor for many firms in emerging competitive environment. Despite this importance, the recognition level of Korean firms on Green Logistics lags behind that of leading companies in developed countries. In addition, the literature studies and practical strategies for systematic management control plans are very insufficient. In this paper, we establish decision making framework of Green Logistics by using ANP(analytic network process). Specifically, we suggest at first the overall concepts and issues of Green Logistics through literature studies. Next, we derive 6 clusters and 21 components forming the strategic green logistics, and then we conduct surveys for pairwise comparison of experts on Green Logistics and compute relative weights of the clusters, components and altanatives considering the feedback structure. We expect that the results of this study will be very helpful for managers to make strategic decisions.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.779-782
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• 2006

21세기 지식정보화 사회에서 수많은 정보가 다양한 곳에서 빠르게 생산되어 다양한 분야에서 공유가 이루어지고 있다. 본 논문에서는 국내외 교육정보공유모델을 분석하여 교육콘텐츠의 다각화, 맞춤형 정보서비스, 지능형 학습 에이젼트 등의 차세대 정보기술변화를 고려한 차세대 교육정보공유모델을 세 가지 측면에서 설계하였다. 설계된 모델은 능동적이고 사용자 중심의 교육정보공유모델을 구축을 위한 참조 모델로서 활용될 수 있다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2019.11a
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• pp.20-21
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• 2019

The Joint Video Experts Team (JVET) has been working on the development of next generation of video coding standard called Versatile Video Coding (VVC). Position Dependent Intra Prediction Combination (PDPC) which is one of the major tools for intra prediction refines the prediction through a linear combination between the reconstructed samples and the predicted samples according to the sample position. In VVC WD6, nScale which is shift value that adjusts the weight is determined by the width and height of the current block. It may cause that PDPC is applied to regions that do not fit the characteristics of the current intra prediction mode. In this paper, we define nScale for each width and height so that the weight can be applied independently to the left and top reference samples, respectively. Experimental results show that, compared to VTM 6.0, the proposed method gives -0.01%, -0.04% and 0.01% Bjotegaard-Delta (BD)-rate performance, for Y, Cb, and Cr components, respectively, in All-Intra (AI) configuration.

• 전기의세계
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• v.21 no.3
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• pp.48-52
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• 1972

The application of pontryagin's Maximum Principle to the optimal control eventually leads to the problem of solving the two point boundary value problem. Most of problems have been related to their own special factors, therfore it is very hard to recommend the best method of deriving their optimal solution among various methods, such as iterative Runge Kutta, analog computer, gradient method, finite difference and successive approximation by piece-wise linearization. The gradient method has been applied to the optimal control of two point boundary value problem in the power systems. The most important thing is to set up some objective function of which the initial value is the function of terminal point. The next procedure is to find out any global minimum value from the objective function which is approaching the zero by means of gradient projection. The algorithm required for this approach in the relevant differential equations by use of the Runge Kutta Method for the computation has been established. The usefulness of this approach is also verified by solving some examples in the paper.

• The Journal of the Korean dental association
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• v.21 no.7 s.170
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• pp.579-583
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• 1983

A 58-year old woman with no molar teeth on her upper left side wanted these missing teeth to be replaced with a fixed implant prosthesis. Incision, from distal to 2nd premolar to hamulus, was performed and impression of canine fossa anteriorly, zygoma buccally, pterygoid hamulus posteriorly and palatal groove lingually was taken by Optosil (Bayer Dent.). The implant frame was made of Vitallium, and was inserted the next day after the impression had been taken. 12-days later, the 4-units fixed prosthesis was constructed. The patient was extremely comfortable, had no pain, and was able to chew food more efficiently.

• Publications of The Korean Astronomical Society
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• v.1 no.1
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• pp.21-37
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• 1984

The origin of five small satellites (1980 S1, 1980 S3, 1980 S26, 1980 S27 and 1980 S28) and F-ring of Saturn which were recently discovered inside the orbit of Mimas, is proposed in terms of the resonant effects by external satellites in the Saturnian primordial extended ring. From the calculations of resonance locations and strengths, the following conclusion could be derived. Assuming that present two objects 1980 S1 and 1980 S3 were originally a single object 1980 S1+S3, 1980 S1+S3 had been formed due to Enceladus' 2/1 resonance and 1980 S26 due to Mimas' 3/2 resonance at first and then 1980 S28. 1980 S27 and F-ring were formed in the next due to 1980 S1+S3's 8/7, 9/8 and 10/9 resonances, respectively.

• Journal of electromagnetic engineering and science
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• v.3 no.1
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• pp.17-21
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• 2003

In this paper, we design an optimal planar array geometry for maximum side-lobe reduction. The concept of thinned array is applied to obtain an optimal two dimensional(2-D) planar array structure. First, a 2-D rectangular array with uniform spacing is used as an initial planar array structure. Next, we modify the initial planar array geometry with the aid of thinned array theory in order to reduce the maximum side-lobe level. This is implemented by a genetic algorithm under some constraint, minimizing the maximum side-lobe level of the 2-D planar array. It is shown that the optimized planar array structure can achieve low side-lobe level without optimizing the excitations of the array antennas.

• Korean Journal of Health Education and Promotion
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• v.21 no.1
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• pp.103-114
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• 2004

The Korean society for health education and promotion was established in 1982. The following year, the first journal of the Korean society for health education and promotion was published It has been 20 years since the first journal was published. For the future possibilities of the journal this study examined the annals of the journals and the characteristics of those articles. To do that, 8 variables were chosen： year of publication, volume number, numbers of researchers, types of articles, study field, research subjects, and trends of the study. A great growth has been noticed during the last 20 years. However, it was found that only limited study fields were investigated and the most frequently adopted study subject was a student groups. Most of the studies were carried out for the purpose of providing basic information in their study fields. It is noted that for the next decade the journal should assure the quality of articles.

• Transactions of the Korean hydrogen and new energy society
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• v.21 no.4
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• pp.346-353
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• 2010

Hydrogen fueled vehicle was evaluated as one of the next-generation technology that will be able to solve the global warming, depletion of fossil fuel and etc. The practical use of hydrogen fueled vehicle, nevertheless, is being delayed more than expected schedule due to various causes. In order to promote the dissemination of hydrogen fueled vehicle, development status and obstacle factors of practical use for hydrogen fueled vehicles were reviewed and the strategy plans for dissemination promotion were proposed. Hydrogen fueled vehicles are included the hydrogen fuel cell, neat and enriched hydrogen fueled engines. The technicalness, economy, safety, cognizance, system, support and etc were considered in the strategy plans.

• Journal of the Korean Society for Precision Engineering
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• v.21 no.1
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• pp.167-172
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• 2004

A method for the design of a disk cam with a remote follower is presented. ADAMS software is utilized for the design process. The whole process is applied for the design of a cam profile to be used in a tappet shedding device of a shuttle loom. First the desired motion of the remote follower, the hearld frame in this case, is determined to improve the characteristic of a certain weaving process. Next, the desired displacement data is input to the ADAMS software and the cam profile is obtained as an output. To test the validity of the proposed method, designed cams were actually manufactured and implemented on a experimental loom. And with the help of potentiometer type displacement transducers, the motion of the remote followers were actually recorded. And the result was sufficient to prove the validity of the presented method.