• 제목/요약/키워드: IT resource

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무인발전소 SCADA SYSTEM 에서의 AQR 제어 운영 (The AQR Control in the SCADA System of Manless Power Plant)

  • 옥연호;이은웅;변일환;김기원;오석영;최형철;이남형
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2009년도 제40회 하계학술대회
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    • pp.58_59
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    • 2009
  • Generator excitation system, supplying the voltage to power system, is controlled by various manners as aspects of power system. Previously excitation systems mainly used AVR(Automatic Voltage Regulator) and FCR(Field Current Regulator) to control voltage, but nowadays the excitation systems have the tendency to adopt AQR(Automatic Reactive power Regulator) and APFR(Automatic Power Factor Regulator) to do it so as to get into step with diverse requirements of power system and high digital technology. This paper presents which operation methods is effective for the equipment, according to increase the unmanned power station thanks to automation technic.

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Correlation of Oct-4 and FGF-4 Gene Expression on Peri-Implantation Bovine Embryos Reconstructed with Various Somatic Cells

  • Yoon, Byung-Sun;Song, Sang-Jin;Do, Jeong-Tae;Hong, Seung-Bum;Lee, Hoon-Taek;Chung, Kil-Saeng
    • 한국동물번식학회:학술대회논문집
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    • 한국동물번식학회 2002년도 춘계학술발표대회 발표논문초록집
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    • pp.66-66
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    • 2002
  • The efficiency of animal production using cloning technology is relatively low. It is considered that the nuclear transferred (NT) embryos proceed inappropriate reconstruction with donor-recipient cell, which lead to a abnormal embryo development, and differential expression of mRNA transcript. Especially, the expression of mRNA on peri-implantation stage embryos is very important factor to decide success of implantation and ongoing pregnancy. (omitted)

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자원지도에 의한 소수력 잠재량 산출 (Estimation Method of Small Hydro Power Potential Using a Resource Map)

  • 박완순;이철형
    • 한국태양에너지학회:학술대회논문집
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    • 한국태양에너지학회 2008년도 추계학술발표대회 논문집
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    • pp.322-326
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    • 2008
  • This paper presents an estimation method of small hydro power(SHP) potential using a SHP resource map. As a basic unit of SHP energy potential at a certain area, capacity and annual energy production of unit head was calculated from the catchment area given by a SHP resource map which was established by numerical hydrologic simulation so that a logical and relatively accurate potential estimation was possible comparing with the performance analysis model for SHP sites. The performance characteristics for Samok-Ri site were analyzed, using the SHP resource map and the developed model. It was found that the SHP resource map and the developed model is useful tool to estimate SHP potential.

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Design of Web-Based Module and Process for Metal Resource Management

  • Jung, Sung-Mo;Kim, Seok-Soo
    • International Journal of Contents
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    • 제4권1호
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    • pp.1-6
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    • 2008
  • Existing improvement measures for resource management are merely concentrating on the document automation only. In addition, such improvements rarely benefit metal millwork management. Following the trend of constructing high rise and multi-complex buildings, the importance of resource management from the aspect of construction project management is being emphasized. Metal work resources are critical most of construction projects, it became a target for special management. Therefore, the study has determined work process of metal work resource management, for the metal millwork is one of the most important construction materials most of construction projects, and proposed a web based module for improving the management task.

Improved Resource Allocation Scheme in LTE Femtocell Systems based on Fractional Frequency Reuse

  • Lee, Insun;Hwang, Jaeho;Jang, Sungjeen;Kim, Jaemoung
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제6권9호
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    • pp.2153-2169
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    • 2012
  • Femtocells provide high quality indoor communications with low transmit power. However, when femtocells are applied in cellular systems, a co-channel interference problem between macrocells and femtocells occurs because femtocells use the same spectrum as do the macrocells. To solve the co-channel interference problem, a previous study suggested a resource allocation scheme in LTE cellular systems using FFR. However, this conventional resource allocation scheme still has interference problems between macrocells and femtocells near the boundary of the sub-areas. In this paper, we define an optimization problem for resource allocation to femtocells and propose a femtocell resource allocation scheme to solve the optimization problem and the interference problems of the conventional scheme. The evaluation of the proposed scheme is conducted by System Level Simulation while varying the simulation environments. The simulation results show that the proposed scheme is superior to the conventional scheme and that it improves the overall performance of cellular systems.

The role natural resource planr new function

  • Lee, Myung sun
    • 한국자원식물학회:학술대회논문집
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    • 한국자원식물학회 2001년도 추계정기 학술발표회 초록집
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    • pp.5-10
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    • 2001
  • It is necessary for governmental supporting polices to collect. management and maintain the genetic resource with respects of diversity of useful natural resource plant and domestic variety for plant industry. There are the main tasks of functional plant industry to develope the techniques of systemic management of genetic resources with sufficient life because of having the key of human's fate with life and death and being the valuable thing to be Investigation. collection and introduction of genetic resource with natural resource plants. Agriculture after WTO is putting an emphasis on the development of functional plants with highly competitiveness In world market under long term and organizing plants Genetic resource of plant in the official institution are maintaining and managing to be possible the regeneration and reproduction if necessary. and utilizing whoever need them.

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컨테이너 터미널의 자원관리를 위한 정보시스템의 분석 및 설계에 관한 연구 (A Study on Analysis and Design Method for Resource Management Information System in Container Terminal)

  • 김헌종;송재성;서만승
    • 한국정보시스템학회:학술대회논문집
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    • 한국정보시스템학회 2000년도 추계학술대회
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    • pp.12-15
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    • 2000
  • An SADT-based methodology is presented for systematically analyzing the container working process in container terminal, as well as an object-oriented design method for an integrated information system for container terminal resource planning and management. Our design architecture is composed of four levels, activity interface, activity PDCA control, human resource management, and facility resource management. Especially, the consideration of the human resource management level makes it possible to support cooperative tasks, to make the authority and responsibility on a task clear, and to extremely promote the balance between human and facility resources. Finally, The system architecture is suggested for Virtual Container Terminal, in which a planned container working process is simulated for previous feasibility check, work orders are transferred to control real devices, and to manage the entire process and related data.

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Towards Resource-Generative Skyscrapers

  • Imam, Mohamed;Kolarevic, Branko
    • 국제초고층학회논문집
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    • 제7권2호
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    • pp.161-170
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    • 2018
  • Rapid urbanization, resource depletion, and limited land are further increasing the need for skyscrapers in city centers; therefore, it is imperative to enhance tall building performance efficiency and energy-generative capability. Potential performance improvements can be explored using parametric multi-objective optimization, aided by evaluation tools, such as computational fluid dynamics and energy analysis software, to visualize and explore skyscrapers' multi-resource, multi-system generative potential. An optimization-centered, software-based design platform can potentially enable the simultaneous exploration of multiple strategies for the decreased consumption and large-scale production of multiple resources. Resource Generative Skyscrapers (RGS) are proposed as a possible solution to further explore and optimize the generative potentials of skyscrapers. RGS can be optimized with waste-energy-harvesting capabilities by capitalizing on passive features of integrated renewable systems. This paper describes various resource-generation technologies suitable for a synergetic integration within the RGS typology, and the software tools that can facilitate exploration of their optimal use.

그리드 환경에서의 효율적인 자원 관리를 위한 공급-조정 전략 모델 (Supply-Driven Strategies Model for Resource Management in Grid Environment)

  • 마용범;이종식
    • 한국시뮬레이션학회:학술대회논문집
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    • 한국시뮬레이션학회 2005년도 추계학술대회 및 정기총회
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    • pp.65-70
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    • 2005
  • Recently, Grid is embossed as a new issue according to the need of cooperation related to distributed resources, data sharing, Interaction and so on. It focuses on sharing of large scale resources, high-performance, applications of new paradigms, which improved more than established distributed computing. Because of the environmental specificity distributed geographically and dynamic, the most important problem in grid environment is to share and to allocate distributed grid resources. This paper proposes supply-driven strategies model that is applicable for resource management in grid environment and presents a optimal resource allocation algorithm based on resource demands. Supply-driven strategies model can offer efficient resource management by transaction allocation based on user demand and provider strategy. This paper implements the supply-driven strategies model on the DEVS modeling and simulation environment and shows the efficiency and excellency of this model by comparing with established models.

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Mix/Path 분리에 의한 장기전력수급계획 대안생성 (Development of Alternative Long-term Electric Resource Plans by Mix/Path 2-Stage Procedure)

  • 권영한;김창수;진병문
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1996년도 하계학술대회 논문집 B
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    • pp.871-874
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    • 1996
  • It is practically very important in multi-criteria long-tenn IRP process to develop the set of candidate resource plans that meet following two conditions. First, the number of resource plans should not be too large for computer job. Second, the unknown best plan should exist among the set of candidate plans. In this paper, several novel procedures are developed. The main idea of the procedures is the two-stage approach. The first stage is to find the set of feasible resource capacity mixes in given target year(s). And, the second stage is to find the set of alternative paths of resource options for each resource mix determined in the first stage.

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