• Title/Summary/Keyword: Unit Test Area

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A Code Assignment Algorithm for Microinstructions (마이크로 명령어의 코드 할당 알고리즘)

  • Kim, H.R.;Kim, C.S.;Hong, I.S.;Lim, J.Y.;Lim, I.C.
    • Proceedings of the KIEE Conference
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    • 1988.07a
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    • pp.587-590
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    • 1988
  • In the case of VLSI computer system control unit design using PLA, optimal state code assignment algorithm to minimize the PLA area is proposed. An optimal state code assignment algorithm which considers output state and logic minimization simultaneously is proposed, and by means of this, algorithm product term is minimized. Also, by means of this algorithm running time and memory capacitance is decreased as against heuristic state code assignment algorithm which uses matrix calculation and considers the constraint relation only. This algorithm is implemented on VAX 11/750 (UNIX4.3BSD). Through the various test example applied proposed algorithm, the efficiency of this algorithm is shown.

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The Study on the Physical and Mechanical Properties of Concrete Used Vitrified Glass (Vitrified Glass 를 혼입한 콘크리트의 물리.역학적 특성)

  • 민정기;조일호;남기성;한영규;성찬용
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • 1999.10c
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    • pp.301-306
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    • 1999
  • Over 4.1 billion metric tons of non-hazardous solid wastes are generated in the United States anually. Therefore, there is a need to reuse or reprocess as many products or by -products as possible. In this report, the aggregates produced from Naval Shipyard and Charlexton area dredge spoils are designated as NC and DS, respectively. The major objective of this portion was to determine the feasibility of the use of these aggregates in concrete mixtures. According to test results, the unit weight of concrete mixtures containing NC and DS (vitrified glass) was lower than the control mixture, and the control mixture produced higher compressive and bending strength compared to mixtures containing vitrified glass. However the mixtures containing vitrified glass still could be used in the field based on the minimum criteria set for the mix desgin.

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EFFICIENT THERMAL MODELING IN DEVELOPMENT OF A SPACEBORNE ELECTRONIC EQUIPMENT

  • Kim Jung-Hoon;Koo Ja-Chun
    • Bulletin of the Korean Space Science Society
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    • 2004.10b
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    • pp.270-273
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    • 2004
  • The initial thermal analysis needs to be fast and efficient to reduce the feedback time for the optimal electronic equipment designing. In this study, a thermal model is developed by using power consumption measurement values of each functional breadboard, that is, semi-empirical power dissipation method. In modeling heat dissipated EEE parts, power dissipation is imposed evenly on the EEE part footprint area which is projected to the printed circuit board, and is called surface heat model. The application of these methods is performed in the development of a command and telemetry unit (CTU) for a geostationary satellite. Finally, the thermal cycling test is performed to verify the applied thermal analysis methods.

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Multi-stack Technique for a Compact and Wideband EBG Structure in High-Speed Multilayer Printed Circuit Boards

  • Kim, Myunghoi
    • ETRI Journal
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    • v.38 no.5
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    • pp.903-910
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    • 2016
  • We propose a novel multi-stack (MS) technique for a compact and wideband electromagnetic bandgap (EBG) structure in high-speed multilayer printed circuit boards. The proposed MS technique efficiently converts planar EBG arrays into a vertical structure, thus substantially miniaturizing the EBG area and reducing the distance between the noise source and the victim. A dispersion method is presented to examine the effects of the MS technique on the stopband characteristics. Enhanced features of the proposed MS-EBG structure were experimentally verified using test vehicles. It was experimentally demonstrated that the proposed MS-EBG structure efficiently suppresses the power/ground noise over a wideband frequency range with a shorter port-to-port spacing than the unit-cell length, thus overcoming a limitation of previous EBG structures.

Hardware-in-the-Loop Simulation of a Vehicle-to-Vehicle Distance Control System (차간거리제어 Hardware-in-the-Loop 시뮬레이션)

  • Moon, Il-Ki;Lee, Chan-Kyu;Yi, Kyong-Su;Kwon, Young-Do
    • Proceedings of the KSME Conference
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    • 2001.06b
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    • pp.741-746
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    • 2001
  • This paper presents an investigation of a vehicle-to-vehicle distance control using a Hardware-in-the-Loop Simulation(HiLS) system. Since vehicle tests are costly and time consuming, how to establish a efficient and low cost development tool is an important issue. The HiLS system consists of a stepper motor, an electronic vacuum booster, a controller unit and two computers which are used to form real time simulation and to save vehicle parameters and signals of actuator through a CAN(Controller Area Network). Adoption of a CAN for communication is a trend in the automotive industry. Since this environment is the same as that of a real vehicle, a distance control logic verified in laboratory can be easily transfered to a test vehicle.

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Development of a 0.5MW PCS for efficient connection operation of wind power system (풍력 발전시스템의 효율적인 연계운전을 위한 0.5MW급 PCS 개발)

  • Lee, Yun-Jae;Choi, Eun-Sik;Lee, Chung-Woo;Ryu, Kang-Yeul;Jo, Jang-Ho;Lee, Jin
    • Proceedings of the KIPE Conference
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    • 2012.07a
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    • pp.498-500
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    • 2012
  • According to the climatic characteristics of the wind power output is difficult to predict and a severe strain due to a change in output has been very influential in the grid. Jeju Hangwon wind farm, many of the wind generator is installed in a wide area because it is not have this device that artificially Smoothing is needed. In addition, By the requirements of the power company active power supply / control and improve power system reliability and energy storage during the peak demand for electricity using the energy stored in the power supply is needed. In this paper, Unit 12 in Jeju Hangwon demonstrated 0.5MW PCS and energy storage system associated with the wind through the stabilization of output and the leveling of output and test results will be introduced.

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The Impact of Stock-to-Flow Price Ratio on Housing Starts (재고-신규주택 상대가격이 주택공급에 미치는 영향)

  • Ji, Kyu Hyun;Choi, Sung Ho
    • Land and Housing Review
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    • v.11 no.1
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    • pp.59-66
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    • 2020
  • This thesis investigates relationship between Stock-to-Flow price and housing starts in Seoul metropolitan form 2008 year to 2019 year. The paper tests the relationship through two time-series models such as a vector error correction model and Dynamic Panel regression model. The model results show evidence of positive correlation between Stock-to-Flow price and housing starts in the long run. By transforming the regional data into a panel data set and running a fixed effects model, we test the explanatory power of PBR on housing starts. The result of VECM confirms that one unit uprising PBR raises up apartment construction by 7.4%. This result supports that PBR is a major factor in choosing a start of housing construct. Base on the result of empirical model, We also suggest that the market self-regulation function of housing providers is operating in the entire metropolitan area market.

Dredging Material Application Lightweight Foamed Soil Full Scale Test Bed Verification (준설토 활용 경량기포혼합토 실규모 현장 실증 연구)

  • Kim, Dong-Chule;Yea, Gue-Guwen;Kim, Hong-Yeon;Kim, Sun-Bin;Choi, Han-Lim
    • Journal of Coastal Disaster Prevention
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    • v.5 no.4
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    • pp.163-172
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    • 2018
  • To propose the design technique and the execution manual of the LWFS(Lightweight Foamed Soil) method using dredged soil, the operation system for the test-bed integrated management, and to establish an amendment for the domestic quantity per unit and specifications, and a strategy for its internationalization. In order to utilize the dredged soil from the coastal area as a construction material, we constructed the embankment with LWFS on soft ground and monitored its behavior. As a result, it can be expected that the use of LWFS as an embankment material on the soft ground can improve the economic efficiency by reducing the depth and period of soil improvement as well as the uses of nearby dredged soil. To verify the utilization of the dredged soil as a material for light-weighted roadbed, soft ground and foundation ground, and surface processing, perform an experimental construction for practical structures and analyze the behavior. It is expected to be able to improve the soft ground with dredged soil and develop technique codes and manuals of the dredged soil reclamation by constructing a test-bed in the same size of the fields, and establish the criteria and manual of effective dredged soil reclamation for practical use. The application technology of the dredged soil reclamation during harbor constructions and dredged soil reclamation constructions can be reflected during the working design stage. By using the materials immediately that occur from the reclamation during harbor and background land developments, the development time will decrease and an increase of economic feasibility will happen. It is expected to be able to apply the improved soil at dredged soil reclamation, harbor and shore protection construction, dredged soil purification projects etc. Future-work for develop the design criteria and guideline for the technology of field application of dredged soil reclamation is that review the proposed test-bed sites, consult with the institutions relevant with the test-bed, establish the space planning of the test-bed, licensing from the institutions relevant with the test-bed, select a test-bed for the dredged soil disposal area.

Evaluation of Installation Damage Factor for Geogrid using Maximum Particle Size of Backfill Material (뒤채움 최대입도를 이용한 지오그리드 보강재의 시공손상계수 산정 방법)

  • Kim, Kyung-Suk;Choi, Young-Chul;Kim, Tae-Soo;Lim, Seoung-Yoon
    • Journal of the Korean Geosynthetics Society
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    • v.6 no.4
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    • pp.29-37
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    • 2007
  • Reduction Factor for Installation Damage required for calculation of design strength of geogrid used in MSEW(mechanically stabilized earth wall) design is usually obtained in the field test simulating real construction condition. However, damages occurred in geogrid during backfill work are influenced by many factors such as polymer types, unit weight per area, backfill construction method and gradation of backfill material and field test considering these factors demands lots of time and costs. In this study, factors affecting installation damage are analyzed and empirical method for evaluating reduction factor for installation damage using maximum particle size in backfill material is suggested.

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The Relationship among Nurse-Doctor Collaboration, Job Autonomy and Organizational Commitment (간호사-의사 협력, 직무자율성과 조직몰입의 관계)

  • Hong, Ji-Yeon;Kim, Ok-Hyun;Lee, Eun-Kyung
    • Journal of Korean Academy of Nursing Administration
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    • v.15 no.4
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    • pp.601-609
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    • 2009
  • Purpose: This study aimed to investigate and analyze the state of the relationship among nurse-doctor collaboration, job autonomy and organizational commitment. Method: The 304 participants were obtained who were working at a General ward, Intensive care unit and Operation room in three university hospitals located in Seoul and Kyunggi-do. The data were collected using a structured questionnaire from March 2d to April 10th, 2009. The collected data were analyzed with t-test, ANOVA, Scheff$\acute{e}$ test and Pearson's correlation on SPSS Win 16.0. Result: There was a significant relationship among nurse-doctor collaboration, job autonomy and organizational commitment. The level of appointment, clinical experience and current hospital experience of nurses affected significantly nurse-doctor collaboration, job autonomy and organizational commitment. The age of nurse had the relation nurse-doctor collaboration and organizational commitment. The relationship between the nurse's working area and job autonomy had positive correlation. Conclusions: The findings of study suggest that the program enhancing the collaborated relationship between nurses and doctors is important to improve nurse's job autonomy and organizational commitment under the situation of citizen's demanding more advanced medical service.

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