• 한국콘텐츠학회:학술대회논문집
• /
• 한국콘텐츠학회 2003년도 춘계종합학술대회논문집
• /
• pp.149-154
• /
• 2003

21세기가 도래하면서 초고속 인터넷망의 발달과 더불어 편리함을 더욱 추구하고자 인터넷 주문 시스템이 발달 되어가고 있다. 현재 인터넷으로 음식 주문하는 시스템이 많이 개발되어 있지만 언제 어디서나 자신이 편한 곳에서 주문하고자 하는 소비자의 욕구에 충족하기 위하여 이동성이 확보된 무선 인터넷 단말기 (PDA, Pocket PC, HPC 등) 를 이용한 음식 주문시스템과 유선으로 주문 할 수 있는 시스템이 필요하다. 본 논문에서는 CTI를 기반으로 한 유/무선 인터넷 음식 주문 시스템을 설계하고 구현 하였다.

• 한국콘텐츠학회논문지
• /
• 제3권3호
• /
• pp.34-39
• /
• 2003

21세기가 도래하면서 초고속 인터넷망의 발달과 더불어 편리함을 더욱 추구하고자 인터넷 주문 시스템이 발달되어 가고 있다. 현재 인터넷으로 음식 주문하는 시스템이 많이 개발되어 있지만 언제 어디서나 자신이 편한 곳에서 주문하고자 하는 소비자의 욕구에 충족하기 위하여 이동성이 확보된 무선 인터넷 단말기 (PDA, Pocket PC, HPC등)를 이용한 음식 주문시스템과 유선으로 즉 PC를 통해서 음식점의 전화로 주문 할 수 있는 시스템이 필요하다. 본 논문에서는 CTI시스템을 기반으로 한 유/무선 인터넷 음식주문 시스템을 설계하고 구현하였다.

• 한국전산유체공학회지
• /
• 제13권3호
• /
• pp.69-78
• /
• 2008

The high-order numerical method based on the adaptive mesh refinement(AMR) on the quadrilateral unstructured grids has been developed in this paper. This adaptive-grid method, originally developed with MUSCL-TVD scheme, is now extended to the WENO (weighted essentially no-oscillatory) scheme with the Runge-Kutta time integration of fifth order in spatial and temporal accuracy. The multidimensional interpolation was studied in the preliminary research, which allows us to maintain the same order of accuracy for the computation of numerical flux between two adjacent cells of different levels. Some standard benchmark tests are done to validate this method for checking the overall capacity and efficiency of the present adaptive-grid technique.

• 대한기계학회논문집A
• /
• 제29권11호
• /
• pp.1455-1462
• /
• 2005

In this paper, we intend to introduce a nonlinear finite element method based on the fully nonlinear potential flow theory in order to simulate the large amplitude sloshing flow in two-dimensional baffled tank subject to horizontally forced excitation. The free surface is tracked by a direct time differentiation scheme with the four-step predictor-corrector time integration method. The flow velocity is accurately recovered from the velocity potential by second-order least square method. In order to maintain the finite element mesh regularity and total mass, the semi-Lagrangian surface tracking method with area conservation is applied. According to the numerical formulae, we perform the parametric experiments by varying the installation height and the opening width of baffles, in order to examine the effects of baffle on the nonlinear liquid sloshing. From the numerical results, the hydrodynamic characteristics of the large amplitude sloshing are investigated.

• 전자공학회논문지B
• /
• 제32B권1호
• /
• pp.110-119
• /
• 1995

The lateral resolution in an ultrasound imaging system is one of the most important factors for quality of the image and is determined by the beam focusing. For the better lateral resolution SDF(Sampled Delay Focusing) capable of digital focusing was proposed. The second-order sampling, one of band-width sampling methods, is suggested as being the best suitable for SDF because it allows total digital processing and is simple and economical. By proving that it introduces too much error, this article shows the second-order sampling is not appropriate for sampling of the wide-band signal generally used in ultrasound imaging systems. Also, this article suggests new sampling methods that maintain the advantages and reduce the unavoidable errors of the second-order sampling method. From computer simulation it is expected that the proposed methods reduce the errors of the second-order sampling method and can be used in real applications.

• 복식
• /
• 제24권
• /
• pp.47-58
• /
• 1995

The Study is to find out the thought of costume of the people who advocated the Wejung-chunksa. Conclusions are described as follows 1. The action to boycott western goods was the early response in the Wejung -chuksa Thought. The reason were in fear of ruin in chosun industry and worry about the westernizing the Korean. 2. The people of the Wejung-chuksa had the conservative character in order to maintain the traditional public order and the costume. They thought that costume have a role to distinguish between man and woman , the rich and the poor and so on. Therefore acceptance the wastern constume style meant that the Korean became a savage. So that they rejected the King's order about the dress-system reformation in 1884, 1895. That pointed that their ultimate purpose was to keep the traditional rule. 3. In appearance the purpose of the short-hair law was good for health. But it meant to destory the traditional order and to symbolize the civilization . Especially the short -hair in the people of Wejung-chuksa meant the destruction of the traditional rule and casting away the courtesy. Therefore they wanted to keep the value of the traditional costume.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2007년도 제38회 하계학술대회
• /
• pp.1716-1717
• /
• 2007

In this paper, a second order fuzzy sliding mode control that combines with a adaptive self-regulating technique is proposed for a nonlinear system with unknown dynamics. The chattering effect that is a representative disadvantage of the sliding mode control is avoided by using the second order sliding mode control instead of the first order sliding mode control. The proposed sub-controller is composed of the equivalent control that is approximated by an online rule regulation sheme and the hitting control that is used to constrain the states of the sub-system to maintain on the sub-sliding surface and used to guarantee the system robustness. Simulation results are presented to show the effectiveness of the proposed controller

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 B
• /
• pp.468-471
• /
• 2003

In this paper, a second order sliding mode control that combines with a fuzzy adaptation technique is presented for a nonlinear system with unknown dynamics. The chattering effect that is a representative disadvantage of the sliding mode control is avoided by using the second order sliding mode control instead of the first order sliding mode control. The proposed controller is composed of the equivalent control that is approximated by an online adaptation scheme and the hitting control that is used to constrain the states to maintain on the sub-sliding surface and used to guarantee the system robustness. Simulation results are presented to show the effectiveness of the proposed controller.

• 수산경영론집
• /
• 제15권1호
• /
• pp.1-57
• /
• 1984

The fisherman has been playing the roles of forming the fisheries village and surviving the fisheries production. Therefore, we should understand the nature of the fisherman's successor-cultivation which has been performed in order to maintain equlibrium between the fisheries economy and the national economy. Thesedays, fisherman's successor-cultivation mainly has been undertaken by the government in order to facilitate forming the economic foundation of fisherman's successor who has intended to choose "fisheries" as his own occupation in the future. From the above-mentioned, we find the meaning of the undertaking as both securing the foundation of living permanently and having the worth-while life of a professional fisherman by the survival and growth of his own business. And then, choosing the "fisheries" as an occupation, the successor should be satisfied with the requisites of occupation: 1) maintaining one's living, 2) working out one's individuality, 3) fulfilling one's social role-through engaging in the fisheries. Therefore, in order to have these requisites satisfied, I intend to suggest the followings : Firstly to maintain one's living, the environment of fisheies village should be kept in good condition to facilitate the successor's economic performance. Secondly to work out one's individuality, the fisheries' educational system should be adjusted to improve fisherman's ability. 1 hope to institute "the course of regional fisheries management" in fisheries high school and junior vocational collage, and "the school of fisheries management" for the learning of advanced fisheries knowledge. Thirdly to fulfill one's role, the opportunity actively participating in decision-making of the village's affair should be prepared more sufficiently, and the present fishing-centered fisheries system should be reformed into the fish-farming-centered fisheries system. To do this, the long-perspective vision is necessary. These three suggestions are come out from the macro-view point. Meanwhile the fisherman as an individual to improve his business is from the micro-view point. That is, the public aid, financial and legal, should be prepared. The above-mentioned suggestions are necessary to equalize fisherman's social status with other professional's especially from the result of improving the successor's economic force. Therefore, the principle of cultivating the fisherman's successor should be the principle of social equilibrium. be the principle of social equilibrium.

• 한국측량학회:학술대회논문집
• /
• 한국측량학회 2004년도 추계학술발표회 논문집
• /
• pp.361-366
• /
• 2004

Geographic Information has been used widely for landuse and management, city plan, and environment and disaster management, etc., But geographic information has been built for individual cases using various methods. Therefore, the discordancy in data, double investment, confusion of use and difficulty of decision supporting system have been occurred. In order to solve these problems, national government is need to framework database. This framework database was enacted for building and use of National Geographic Information System and focused on basic plan of the second national geographic information system. Also, the framework database was selected of eight fields by NGIS laws and 19 detailed items through meeting of framework committee since 2002. In this research, The 19 detailed items( road, railroad, coastline, surveying control point etc.,) of framework database consider a Priority order, In the result of this research, the framework database is obtain to a priority order for building and the national government will carry effectively out a budget for the framework database building. Each of 19 detailed items is grouping into using the priority order of the framework database by AHP analysis method and verified items by decision tree analysis method. The one of the highest priority order items is a road, which is important for building, continuous renovation, and maintain management for use.