• Title/Summary/Keyword: Integrated Measure

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ESTIMATING THE OPERATOR'S PERFORMANCE TIME OF EMERGENCY PROCEDURAL TASKS BASED ON A TASK COMPLEXITY MEASURE

  • Jung, Won-Dea;Park, Jin-Kyun
    • Nuclear Engineering and Technology
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    • v.44 no.4
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    • pp.415-420
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    • 2012
  • It is important to understand the amount of time required to execute an emergency procedural task in a high-stress situation for managing human performance under emergencies in a nuclear power plant. However, the time to execute an emergency procedural task is highly dependent upon expert judgment due to the lack of actual data. This paper proposes an analytical method to estimate the operator's performance time (OPT) of a procedural task, which is based on a measure of the task complexity (TACOM). The proposed method for estimating an OPT is an equation that uses the TACOM as a variable, and the OPT of a procedural task can be calculated if its relevant TACOM score is available. The validity of the proposed equation is demonstrated by comparing the estimated OPTs with the observed OPTs for emergency procedural tasks in a steam generator tube rupture scenario.

Development of Sensing System for an Engine Oil Deterioration Detection Sensor Integrated with an Oil Filter (오일필터 일체형 엔진오일 퇴화감지센서용 센싱시스템 개발)

  • Chun, Sang-Myung
    • Journal of Sensor Science and Technology
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    • v.20 no.4
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    • pp.243-248
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    • 2011
  • The purpose of this study is to develop a sensing system to measure the capacitance of a pre-developed engine oil deterioration detection sensor integrated with an oil filter. To measure the capacitance of engine oil in the sensor, it is used the way measuring the electric charging time in a capacitor by impressing DC volt. This method has merits on cost and signal stability. The measured capacitance is compensated by comparison with the one measured by an impedance analyzer. Also, using the dielectric constant gained by an impedance analyzer, the calculating equation of the dielectric constant of engine oil related with the currently developed sensor is decided. Finally, the degradation degree of engine oil is estimated according to the change rate of dielectric constant between green oil and used oil. The newly developed personal controller is to control a series of the processes.

MSBS-SPR Integrated System Allowing Wider Controllable Range for Effective Wind Tunnel Test

  • Sung, Yeol-Hun;Lee, Dong-Kyu;Han, Jong-Seob;Kim, Ho-Young;Han, Jae-Hung
    • International Journal of Aeronautical and Space Sciences
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    • v.18 no.3
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    • pp.414-424
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    • 2017
  • This paper introduces an experimental device which can measure accurate aerodynamic forces without support interference in wide experimental region for wind tunnel test of micro aerial vehicles (MAVs). A stereo pattern recognition (SPR) method was introduced to a magnetic suspension and balance system (MSBS), which can eliminate support interference by levitating the experimental model, to establish wider experimental region; thereby MSBS-SPR integrated system was developed. The SPR method is non-contact, highly accurate three-dimensional position measurement method providing wide measurement range. To evaluate the system performance, a series of performance evaluations including SPR system measurement accuracy and 6 degrees of freedom (DOFs) position/attitude control of the MAV model were conducted. This newly developed system could control the MAV model rapidly and accurately within almost 60mm for translational DOFs and 40deg for rotational DOFs inside of $300{\times}300mm$ test section. In addition, a static wind tunnel test was conducted to verify the aerodynamic force measurement capability. It turned out that this system could accurately measure the aerodynamic forces in low Reynolds number, even for the weak forces which were hard to measure using typical balance system, without making any mechanical contact with the MAV model.

A Study on Optimal Developmental Cost for Quality Factors of Integrated Information Security Systems (통합정보보호시스템의 최적 품질 확보를 위한 최소개발비용 탐색에 관한 연구)

  • Park, You-Jin;Choi, Myeong-Gil
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.33 no.3
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    • pp.1-9
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    • 2010
  • To protect information resources, many organizations including private corporate and government employ integrated information security systems which provide the functions of intrusion detection, firewall, and virus vaccine. So, in order to develop a reliable integrated information security system during the development life cycle, the managers in charge of the development of the system must effectively distribute the development resources to the quality factors of an integrated information security system. This study suggests a distribution methodology that minimizes the total cost with satisfying the minimum quality level of an integrated information security system by appropriately assigning development resources to quality factors considered. To achieve this goal, we identify quality factors of an integrated information system and then measure the relative weights among the quality factors using analytic hierarchy process (AHP). The suggested distribution methodology makes it possible to search an optimal solution which minimizes the total cost with satisfying the required quality levels of processes by assigning development resources to quality factors during the development life cycle.

Difference in Percieved Effectiveness between Two Types of IS Outsourcing : Integrated vs. Backend (정보시스템 기능의 외부위탁(outsourcing) 유형에 따른 인식된 효과성에 관한 연구)

  • An, Jung-Ho;Park, Ji-Sang
    • Asia pacific journal of information systems
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    • v.4 no.2
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    • pp.165-187
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    • 1994
  • This paper tests whether there are any differences in perceived effectiveness according to the range of outsourcing, and we tried to identify the reasons if any. By executing a field survey and T-test on composite success measure value of two types (integrated outsourcing type and backend outsourcing type), we testified that the perceived effectiveness of the two types in outsourcing was not different. Discussion fo the stududy result followed. First, 'integrated outsourcing type' does not generate very excellent performance. Second, so far the characteristics of 'integrated outsourcing type' such as strategic management of IS, activating end-user computing(EUC), and making the strategic partnership with vendors and so on have not been successfully utilized as expected.

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The Analysis Method of Integrated Logistic System using Evolution Strategies and Data Envelopment Analysis (진화전략과 DEA를 이용한 통합 물류 시스템 분석 방법)

  • Um In-Sup;Lee Hong-Chul;Kang Jeong-Yun
    • Journal of the Korea Society for Simulation
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    • v.13 no.4
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    • pp.17-29
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    • 2004
  • The focus of this study is to represent a methodology of analysis for integrated logistic system by means of the Evolution Strategies and Data Envelopment Analysis(DEA). The integrated logistic system is composed of AS/RS (Automated Storages and Retrieval System), AGVs(Automated Guided Vehicle System) and Conveyor System. We design the simulation alternatives with choosing the qualitative critical factors for the each subsystem. Evolution Strategies is used to optimize the quantitative critical factors and responses of each alternative. DEA is applied to measure the efficiency of the alternatives in order to select the optimal operation efficiency scheme. The method of analysis which combines Evolution Strategies with DEA can be used to analyze the qualitative and quantitative critical factors in the integrated logistic systems.

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Surface Acoustic Waves Sensors for Wireless Measurement of Temperature (Surface Acoustic Wave를 이용한 무선 온도 센서 설계 및 구현)

  • Kim, Jaek-Won;Park, Joo-Yong;Kim, Kyung-Hwan;Yeo, Joon-Ho;Burm, Jin-Wook
    • Proceedings of the IEEK Conference
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    • 2006.06a
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    • pp.469-470
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    • 2006
  • Surface Acoustic Wave(SAW) devices can be used to as wireless sensor elements, called SAW transponders, for measuring shysical quantities such as temperature that do not need any power supply and may be accessed wirelessly. SAW devices were fabricated on Y-Z $LiNbO_3$ piezoelectric substrate with a good temperature coefficient property. The signal response of SAW sensor on the temperature change were compared. To measure the change of SAW velocity. Temperature changed form $20^{\circ}C$ to $400^{\circ}C$ was linearly changed, the SAW sensor is application to the temperature sensor.

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Exploring and Discussing the Link between Integrated Leadership in the Public Sector and Follower Happiness: the Case of South Korea

  • Lee, Soochang;Kim, Daechan
    • International Journal of Advanced Culture Technology
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    • v.7 no.2
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    • pp.42-51
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    • 2019
  • This study tests the applicability of concepts of integrated leadership-in-government and follower happiness in South Korea and then comes up with implication and limitations on the applicability based on the study of Mathias et al. (2018). The study adopts eight leaderships: accountability, rule-following, political loyalty, network governance, task-oriented, relations-oriented, change-oriented and diversity-oriented leadership that Mathias et al. (2018) employ from Fernandez et al. (2010) and Tummers and Knies (2016). We also select job satisfaction and self-perceived performance to measure follower happiness depending on Mathias et al. (2018). According to the analytical results, it shows that accountability leadership, network governance leadership, task-oriented leadership, relations-oriented leadership, and change-oriented leadership have positive influences on follower happiness measured. Based on the analytical results, this study suggests implication and limitation on the applicability of the link between integrated leadership and follower happiness in comparison to the results from Mathias et al. (2018).

Manipulability Analysis of a New Parallel Rolling Mill Based upon Two Stewart Platforms

  • Lee, Jun-Ho;Hong, Keum-Shik
    • 제어로봇시스템학회:학술대회논문집
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    • 2002.10a
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    • pp.107.5-107
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    • 2002
  • In this paper, a kinematic optimal design of a new paralleltype rolling mill based upon two Stewart platforms manipulator is investigated. The objective of this new parallel-type rolling mill is to permit an integrated control of the strip thickness, strip shape, pair crossing angle, uniform wear of the rolls, and tension of the strip. A manipulability measure, as the ratio of the manipulability ellipsoid volume and the condition number of a split Jacobian matrix, is defined. Two kinematic parameters, the radius of the base and the angle between two neighboring joints, are optimally designed by maximizing the global manipulability measure in the entire workspace.

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Airflow pattern of Double window system for Remodeling by using Integrated Simulation. (통합 시뮬레이션을 통한 리모델링용 이중창 시스템 기류 패턴 분석)

  • Kim, Eun-Hee;Nam, Hyun-Jin;Yook, In-Soo;Kim, Jeong-Yoon;Kim, Jae-Min
    • Proceedings of the SAREK Conference
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    • 2008.06a
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    • pp.1036-1041
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    • 2008
  • Double facade systems are often paid attention of as an effective energy saving measure for curtain wall buildings. However, it is not easy to install the system in existing buildings and requires substantial investment. An innovative double window system is proposed in this study which can be installed with exiting window systems in a cost effective way. the proposed system is connected to existing return ducts to make airflow between the existing window and the newly installed window. To ensure the best performance of the proposed system, simulation-based analysis was implemented in which airflow characteristics of inside double window were examined according to air pressures of return duct and window material by using computer simulation ESP-r. the overview of the proposed system and the results of the simulation-based analysis are presented in this paper.

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