• 제목/요약/키워드: Operation Program

검색결과 3,079건 처리시간 0.032초

전력시장 환경하에 입찰기반의 직접부하제어 운영방안 (Bid-based Direct Load Control Framework Under Electricity Markets)

  • 이호철;송성환;윤용태
    • 전기학회논문지
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    • 제58권3호
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    • pp.455-461
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    • 2009
  • This paper proposes Direct Load Control(DLC) operation scheme using a bidding system and the methodology to value proper quantity decided by the DLC program, which is a kind of resources for stabilization of electricity market price during peak times by managing consumer electricity demand. Since DLC program in Korea is based on the contract with the customers participating in this program, it is difficult to anticipate voluntary participation. That is, incentive for participants in DLC program is insufficient. To cope with this point, it is necessary to develop a new market mechanism and market compatible operation scheme for DLC programs. DLC market mechanism is deemed to be equipped with iterative bidding system, independent operation from energy market, and interactive with bidding information on energy market. With this market mechanism, it is important to find the optimal operation point of DLC allowing for the factors of stabilizing the electricity market price and compensating DLC implementation. This paper focuses on the mathematical approaches for the bid-based DLC operation scheme and examines several scenarios for the following technical justifications: 1) stabilization of electricity market price during peak times, 2) elasticity of demand.

동영상 교육 프로그램이 자궁적출술 환자의 잔뇨량, 가스배출 및 상태불안에 미치는 효과 (The Effects of the Video Education Program on the Residual urine, Gas Passing and State Anxiety of Hysterectomy Patients)

  • 강경숙;전은미
    • 여성건강간호학회지
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    • 제16권4호
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    • pp.409-418
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    • 2010
  • Purpose: The purpose of this study was to identify the effects of a pre-operation video assisted education program on residual urine, gas passing and state anxiety in women undergoing hysterectomy. Methods: Nonequivalent control group non-synchronized design was used for the study. In the research, video assisted education program was applied to the experimental group while a similar conventional education was done to the control group. The pre-operation state anxiety and post-operation residual urine and gas discharge of both the groups were measured. The data were analyzed using SPSS. Results: The experimental group was significantly higher than control group on gas passing (t=3.04, p=.00). However the residual urine (t=0.34, p=.73) and state anxiety (t=0.81, p=.82) did not make significant differences. Conclusion: This study is very meaningful in that it developed and provided a nursing intervention can positively affect hysterectomy patients. The pre-operation video assisted education program may be an effective nursing intervention that is clinically practical and useful to reduce time of the gas passing of hysterectomy patients after the operation.

경기 지역 학교도서관의 방학독서교실 프로그램 운영 실태 분석 (An Analysis on the Operation of Vacation Reading Guidance Program in School Libraries of Gyeonggi Province)

  • 임성관
    • 한국도서관정보학회지
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    • 제45권4호
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    • pp.21-44
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    • 2014
  • 본 연구는 학교도서관에서 운영되는 방학독서교실의 운영 실태를 분석하여, 방학 중 독서교실의 체계적이고 효율적인 운영방안을 제안하는데 그 목적이 있다. 이를 위해 경기도에 위치한 100개의 학교도서관 사서(교사)로부터 방학독서교실 프로그램에 대한 설문지를 수집하여 분석하였다. 분석 내용은 1) 방학 중 독서교실 프로그램을 운영하는지의 여부, 2) 독서교실 운영의 목적, 3) 독서교실 참여 대상, 4) 독서교실 운영을 위해 참여하는 사람, 5) 독서교실 프로그램의 구체적인 내용 등이다. 분석 결과, 방학 중 독서교실 프로그램은 대부분의 학교에서 운영하였고, 운영 목적은 학생들의 독서흥미를 고취시키기 위한 것이었다. 이에 근거하여 학교도서관의 방학독서교실 프로그램 운영 방안을 다섯 가지 측면에서 제안하였다. 본 연구 결과는 학교도서관의 방학독서교실 프로그램 개발과 운영에 도움을 줄 것이다.

Development and Verification of Operation Management Tool for KASS

  • Minhyuk Son;ByungSeok Lee
    • Journal of Positioning, Navigation, and Timing
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    • 제12권4호
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    • pp.431-436
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    • 2023
  • In order to provide continuous Korea Augmentation Satellite System (KASS) services, the operation organization should continuously and systematically perform operations, maintenance, and technical activities. All subsystems of KASS, all Line Replacement Units (LRUs), and Software Replacement Units (SWRUs) should be operated and maintained continuously. In order to effectively manage these activities, it is necessary to develop an Operation Management Tool (OMT). For this purpose, operation management, operation organization, and operation activities were defined. The defined requirements were divided into general, function, interface, and database for OMT development, and functions and decision-making procedures consisting of site/asset/trouble/work order/schedule management were designed. The OMT developed by reflecting the site and asset information as well as the design content met predefined requirements. The OMT will be actively used in actual KASS operation and will evolve by continuously reflecting the additional requirements of operators. Through this tool, KASS will support continuous service provision.

50nm 급 낸드플래시 메모리에서의 Program/Erase 스피드 측정을 통한 트랩 생성 분석 (Trap Generation Analysis by Program/Erase Speed Measurements in 50 nm Nand Flash Memory)

  • 김병택;김용석;허성회;유장민;노용한
    • 한국전기전자재료학회논문지
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    • 제21권4호
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    • pp.300-304
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    • 2008
  • A novel characterization method was investigated to estimate the trap generation during the program /erase cycles in nand flash memory cell. Utilizing Fowler-Nordheim tunneling current, floating gate potential and oxide electric field, we established a quantitative model which allows the knowledge of threshold voltage (Vth) as a function of either program or erase operation time. Based on our model, the derived results proved that interface trap density (Nit) term is only included in the program operation equation, while both Nit and oxide trap density (Not) term are included in the erase operation equation. The effectiveness of our model was tested using 50 nm nand flash memory cell with floating gate type. Nit and Not were extracted through the analysis of Program/Erase speed with respect to the endurance cycle. Trap generation and cycle numbers showed the power dependency. Finally, with the measurement of the experiment concerning the variation of cell Vth with respect to program/erase cycles, we obtained the novel quantitative model which shows similar results of relationship between experimental values and extracted ones.

소규모 현장 오수처리시설의 통합관리를 위한 모니터링 시스템 설계 및 운영 프로그램 개발 (Design of Monitoring System for Integrated Management of On-site Wastewater Treatment Plants and Development of its Operation Program)

  • 조영현;권순국
    • 한국농공학회:학술대회논문집
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    • 한국농공학회 2002년도 학술발표회 발표논문집
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    • pp.137-140
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    • 2002
  • The monitoring system for integrated management of on-site wastewater treatment plants(biofilter) was designed and its operation program was developed. In design process, the research on monitoring parameters which will be able to represent condition and operation of the pilot plants was accomplished, and these parameters came to reveal with ORP(Oxidation-Reduction Potential), water level, pump and power on/off. Proposed monitoring system is composed with measurement, control, communication and display device, and PCB(Prototype Circuit Boards) and microcontroller (PIC16F877) technique are applied to its design of control device for performing specific function. also, The operation program of PC setup is developed in order to provide a convenience to the manager.

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차세대 전동차 대불선 시운전 시 유지보수방안 연구 (A study on advanced EMU's maintenance program on test operation in Dabul line)

  • 김영규;박세영;송정훈;안천헌;이한민
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2010년도 춘계학술대회 논문집
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    • pp.2215-2222
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    • 2010
  • Advanced EMU have been enhanced in terms of safe transport and maintainability. It is a new urban railway technology that enables an operation institution to cut repair and maintenance costs and customers to use convenient service at lower costs based on IT technology. If a development vehicle of Advanced EMU is completed, it will be used to test the entire advanced EMU system through sufficient performance check and reliability check prior to operation in commercial line. It will also verify efficiency, safety, punctuality and energy efficiency of transport. Accordingly, it is necessary to figure how to repair and maintain vehicles to enhance safety of Advanced EMU system in cooperation with operation during the period of comprehensive evaluation on the operation of a development vehicle in a test line. In this paper, we investigated the maintenance program of Advanced EMU on test operation in Dabul line. The test condition and operation environment of Advanced EMU in Daebul line was analyzed.

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관외 빙착형 빙축열시스템의 운전방식에 따른 최소용량 비교 (Comparative analysis of the minimum capacity of an ice-on-coil thermal storage system for various operation strategies)

  • 이대영;정성훈;강병하
    • 설비공학논문집
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    • 제11권3호
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    • pp.401-413
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    • 1999
  • An ice storage cooling facility with cooling capacity of 150㎾ has been constructed for the purpose of developing optimal design and control strategy for an ice storage system. As the first step to this purpose, a computer program has been developed to simulate the operation of the ice storage system and examined precisely by comparing the results with those measured from the test facility. With the simulation program verified from the comparison, a design procedure has been developed to determine the minimum capacity required for each operation strategy available commercially. It is shown that the minimum sizes of the chiller and the storage tank are strongly dependent on the control strategy, i.e., chiller priority or storage priority, but less affected by the arrangement method, i.e., chiller upstream or chiller downstream.

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융합인재교육(STEAM)의 아웃리치 프로그램 개발 및 운영 사례 (A Case Study of the STEAM Educational Outreach Program Development and their Application)

  • 서원석;이창훈
    • 공학교육연구
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    • 제18권6호
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    • pp.38-45
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    • 2015
  • This study aims to conduct a case study of the Science, Technology, Engineering, Arts, and Mathematics (STEAM) outreach program development and their application. This program was operated by 184 middle and high school students at C University on October 2014. The major results of these studies were as follows: First, The theme of the outreach program consisted of four engineering areas, aerospace engineering, chemical engineering, architectural engineering, and mechatronics (robot) engineering; moreover, the materials for the students' workbook, the guidebook for teachers, and the program operation manual for staffs in a university were developed by working with four authors and ten subject matter experts. Second, the satisfaction level with the contents and activities was ranged from 4.24-4.31 out of 5 points. Third, the vitalizing activation plan was discussed for the sustainable development and operation of the STEAM outreach program.

AC 서보모터 제어 프로그램 구조 설계 및 구현 (Structure Design and Implementation of AC Servo Motor Control Program)

  • 김경아;최준영
    • 대한임베디드공학회논문지
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    • 제18권5호
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    • pp.209-215
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    • 2023
  • This study proposes an AC servo motor control program structure and its implementation method to efficiently integrate 13 types of additional compensation algorithms into the basic FOC (field-oriented control) algorithm program. Various compensation algorithms are necessary to enhance the stability and performance of machine tools by compensating for interference from disturbances and vibrations. Each compensation algorithm is implemented as a separate, independent function and called from a switch-case statement in the ISR (interrupt service routine) of the PWM (pulse-width modulation) device. The advantages of this approach include facilitating not only debugging and testing but also reducing the possibility of errors during the program development phase. Thus, it is easy to add and activate each specific compensation algorithm for the program update during the program operation phase. The implemented motor control program was experimented with a single-axis feed shaft testbed driven by a commercial AC servo motor control drive board and a 750 Watts SPMSM (surface-mounted permanent magnet synchronous motor), and the results verified its normal operation and performance improvement.