• Title/Summary/Keyword: Alternative application

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A Study on the STATCOM Application for Efficient Operations of Wind Farm (풍력발전단지의 효율적인 운전을 위한 STATCOM 적용 가능성 연구)

  • 장성일;최정환;박인기;황혜미;최돈만;김광호;유능수
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.52 no.5
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    • pp.250-256
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    • 2003
  • In this papur, the STATCOM (STATic synchronous COMpensator) application for efficient operations of wind farm is described. The wind farm connected with the electric power network is one of good alternative energy sources. However, it would be also highly possible that interconnection of wind farm causes unwanted influences on distribution system operation, protection and control. This paper proposes the STATCOM application for reducing the negative effects from interconnection of wind farm with distribution networks. The simulation results show that STATCOM would be on effective and useful device to resolve the bad influences from wind farm on distribution networks and improve the operational efficiency of wind farm. In the simulation, the radial distribution network of IEEE 13 bus was modeled using PSCAD/EMTDC.

SGS: Splicing Graph Server

  • Bollina, Durgaprasad;Lee, Bernett T.K.;Ranganathan, Shoba
    • Proceedings of the Korean Society for Bioinformatics Conference
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    • 2005.09a
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    • pp.47-50
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    • 2005
  • SGS (Splicing Graph Server) is as web application based on the MVC architecture with a Java platform. The specifications of the implemented design pattern are closely associated with the specific requirements of splicing graphs for analyzing alternative splice variants from a single gene. The paper presents the use of MVC architecture using JavaBeans as a model, with a JSP viewer and the servlet as the controller for this bioinformatics web application, with the open source apache/tomcat application server and a MySql database management system.

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Application of Growth Models for Pigs in Practice -Review-

  • van der Peet-Schwering, C.M.C.;den Hartog, L.A.;Vos, H.J.P.M.
    • Asian-Australasian Journal of Animal Sciences
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    • v.12 no.2
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    • pp.282-286
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    • 1999
  • Growth of pigs is influenced by many factors. To assist pig producers in the evaluation of alternative feeding and management strategies growth models have been developed. In the Netherlands the Technical Model Pigfeeding (TMV) is developed. This model predicts the influence of feed intake, feed composition, genotype, sex and climate on growth, body composition, gross margin and mineral excretion of healthy growing/finishing pigs. The purpose of TMV is to support information services, feed companies, researchers and students. In addition to providing accurate predictions, a model should also be user-friendly and wishes of the user should be taken into account to stimulate application of the model in practice. In this paper, the theoretical background of TMV and a methodology to stimulate application of models in practice will be described.

A Preliminary Study on the Application of a Fuzzy Controller for the Automatic Landing System of Small Aircraft (소형항공기 자동착륙시스템의 퍼지제어기 적용에 관한 기초 연구)

  • Kim, Keun-Taek;Kim, Eung-Tai;Seong, Kiejeong;Ahn, Seok-min
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.20 no.1
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    • pp.86-93
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    • 2012
  • Fuzzy control has emerged as a practical alternative to classical control schemes in controlling certain time-varying, nonlinear, and ill-defined processes. As the current of this kind of a research paradigm, we concluded that there is a need for application study of a fuzzy control theory to the flight control systems of small aircraft being to be developed at KARI. And then, this preliminary study was carried out to the automatic landing system of the canard aircraft (Firefly) for the purpose of the preparation of extension of research contents and various application areas, in which FMRLC was chosen as the fuzzy controller of the system.

A Study on Architecture of Event Driven Service System (EDS(Event Driven Service) 시스템 구조에 관한 연구)

  • Song, Kwang-Bin;Cho, Sok-Pal
    • The Journal of Information Technology
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    • v.10 no.4
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    • pp.11-26
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    • 2007
  • EDS is a typical convergence service performing convergence between functions owned by multiple SPs. EDS provides users with the relevant information and the communication by the various personal conditional environment. An alternative terminology for events for net- work related applications is 'triggers'-these are assumed to be included in the present description. Events could be defined as any activities which occur within a service avail ability, signals. Events can be managed, for example, as part of a context-aware application. EDS carry out a procedure for processing user's requested information about mobil network-based entities, such as the combination with various applications, such as a LBS (Location Based Service) and area information. In AS (Application Service) network environments, the user has his customized EDS in the network, the EDS automatically connects the appropriate Terminals consistent with a user profile. EDS can also send the collected information to other requesting users by way of event information and using the procedures of combination with other services. The user can record/retrieve the user-related information to from the information base through EDS.

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Research and Development of the Triple Effect Absorption Chiller-Heater Technology in Japan

  • Kashiwagi, Takao;Akisawa, Atsushi;Hamamoto, Yoshinori
    • The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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    • v.33 no.3
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    • pp.43-49
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    • 2004
  • This article reviews R&D of triple effect cycle developed in Japan. Most of the refrigeration and heat pump technologies are dominated by vapor compressor system. The vapor compressor system, however, is highly concerned with the environmental regulations , as most of the vapor compressor technologies are using CFCs or HCFCs which are known as ozone depleting and global warming gases. As a consequence, refrigeration technologists are trying to invent or to develop an alternative to vapor compressor refrigeration devices. Thermally driven, absorption technology is one of the possible alternatives. At the moment, absorption cycle is most promising technology The paper summarizes briefly the current research and development in advanced technologies of triple effect absorption chiller-heater in Japan.(omitted)

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The selection of computerized manufacturing control system using MCDM model (다기준의사결정 모형을 이용한 전산화된 제조관리시스템의 선정에 관한 연구)

  • 정상윤;양대용
    • Journal of the Korea Society of Computer and Information
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    • v.6 no.1
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    • pp.113-118
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    • 2001
  • The purpose of this study is the optimal selection for evaluating alternative computerized manufacturing control software packages. The evaluation and analysis of the alternative computerized manufacturing control software packages is based on a model for Multi-Criteria Decision Making(MCDM). The ultimate of MCDM is to take the best choice among the alternatives or to rank them and the procedure depends on the decision maker's subjective judgement. An example is given to illustrate the application of the MCDM model.

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A Study on the Examination of Feminist Social Work Practice (여성주의 사회복지실천의 정립을 위한 고찰)

  • Kim, In-Sook
    • Korean Journal of Social Welfare
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    • v.41
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    • pp.93-118
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    • 2000
  • The purpose of this study was to introduce major contents and examine the feminist social work practice. Feminist social work practice has never been introduced and applied to social work fields in Korea. By contrast, it has been developed and expanded in advanced Western countries. Feminist social work was emerged under the influence of worldwide Women's Movement on the end of 1960's. After the time, there were critics of existing social work practice by feminist, increase in interest of women's issues, development of principles and methods in feminist social work practice. Feminist social work practice brought, transformative change, application of gender perspectives to social work practice. Also, it offered the visions for 'integrative practice', accepted the alternative principles and methods, and enriched 'theory-practice'. As the result, feminist social work practice contributed to solving or alleviating the problems of many clients, especially women clients. These evidences suggest that feminist social work practice has the possibility of holding an position as a new alternative social work practice.

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Research on the Throughput Impact of the Strategic Stabilizing Capacity Constraint Resources by Prolonging Planning Period

  • Wu, Horng-Huei;Chen, Ching-Piao;Tsai, Chih-Hung;Huang, Kuo-Wei
    • International Journal of Quality Innovation
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    • v.10 no.2
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    • pp.29-42
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    • 2009
  • The issue of capacity constraint resources (CCR) or bottlenecks wandering in product mix decision by applying Theory of Constraints (TOC) management philosophy has been mentioned and demonstrated in several papers. In this study, the effect for prolonging the planning period (PPP) so as to stabilize the CCR is investigated. The results show that the effect for PPP alternative will be positive or negative which is depending on the environment condition. However, a majority cases which have positive effect for PPP alternative can be recognized prior knowing the marketing demand, which is significant in the real application.

Formation of Skin Lotions Using Various Vehicles and Skin Hydration Effects for a Skin (다양한 제형을 활용한 화장수의 제조와 보습효과)

  • Cho, Wan-Goo;Kim, Su-Jeong
    • Journal of the Korean Applied Science and Technology
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    • v.26 no.2
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    • pp.124-131
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    • 2009
  • We have produced, characterized and compared different colloidal vehicles based on nanoemulsions. We also have investigated morphology and droplet distribution by means of electron microscope and photon correlation spectroscopy. Nanoemulsion systems characterized by different method on formulations have been obtained. Hydration power has been studied by means of a corneometer, measuring the skin electrical capacitance before and after the application of various type of skin lotions. It has been demonstrated that nanoemulsion with oil or fatty alcohol displayed a pronounced hydration power with respect to the solubilization system. In order to compare the smoothness of the skin after using skin lotion, we have measured the friction force. The skin lotions produced by nanoemulsion technique show improved smoothness of an atopic skin.