• Title/Summary/Keyword: Team efficiency

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A Measurement of Team Efficiency of Operators in the Advanced Main Control Room of Nuclear Power Plant (국내 원자력발전소 첨단 주제어실 운전원의 팀 효율성 측정 방법에 관한 연구)

  • Kim, Sa-Kil;Byun, Seong-Nam;Lee, Dhong-Hoon
    • Journal of the Ergonomics Society of Korea
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    • v.27 no.1
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    • pp.21-27
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    • 2008
  • An increased use of teams of actors within complex systems has led to the emergence of various approaches for the assessment of different features associated with team performance. Over the last two decades, the performance of teams in complex systems has received considerable attention from the human factors community, and a number of methods have been developed in order to assess and evaluate team performance. The purpose of this paper is to propose a methodology for measuring team efficiency of operators in the advanced main control room of Korean nuclear power plant. Team efficiency is an index which is estimated of gabs between individual performances and team performance. The index was developed to compare among teams through past all performance measurements.

A Study of the Effects of Agent Activeness on Team Performance (행위자의 능동성이 팀 성과에 미치는 영향에 관한 연구)

  • 강민철
    • Journal of the Korean Operations Research and Management Science Society
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    • v.25 no.1
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    • pp.93-104
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    • 2000
  • Passive agents participate in team activities passively, that is, only upon requst, whereas active agents involve themselves voluntarily. Teams composed of active agents are generally believed to perform better than those with passive agents. In this paper, by using a computational simulation model we examine the effect of agent activeness on the efficiency of decision-making teams that access different amout of information. "Team-Soar" is a computational fraemwork that consists of a group of interconnected individual Al agents (i.e., Soar). A simulation experiment using Tearm-Soar was performed. Results of the simulation provide valuable insights on the roles of agent activeness. For example, the impact of having more active agents becomes more sigfniciant as the amout of information to process increases and when the team decision efficiency is important. Some of the results are counter-intultive and therefore provides an opportunity to understand the roles of the agnet activeness more deeply. For instance, the simulation results reveal that having more active agents did not always enhance team efficiency. Conclusively, the simulation experiment demonstrates how computational models contribute to the research of agents social characteristics.teristics.

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Influence of Glass Tube Diameter in the Cold Cathode Fluorescent Lamps for 40-inch LCD-TVs

  • Lee, Min-Kyu;Lee, Kyoung-Ho;Han, Kyu-Hyeon;Lee, Jae-Wook
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.707-710
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    • 2009
  • As the inner diameter of CCFL is increased in the range of outer diameters 3~5 mm, the luminance efficiency is increased by the low power consumption. For the outer diameter 5 mm, the efficiency is linearly increased even at the range of a high current.

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An Empirical Study on the Impacts of the Team-Based Organization Characteristics on Team Effectiveness in the University Library (대학도서관 팀제 운영방식이 팀 효과성에 미치는 영향)

  • Yoon, Hye-Young
    • Journal of Korean Library and Information Science Society
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    • v.35 no.4
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    • pp.23-40
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    • 2004
  • This study examined the impact of team characteristics(introduction of the team approach team empowerment, leadership of team leaders, open communication director's commitment) on team effectiveness (adaptability to the environments, job satisfaction the positive team culture, cost efficiency) in university libraries. The study used a survey design with a questionnaire to staffs who worked at f academic libraries in South Korea. The major findings from the empirical analysis are as follows. The well-prepared introduction of team approach and director's strong commitment were positively related to the team effectiveness variables such as adaptability to environment, job satisfaction, and cost efficiency.

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Fully Substituted Ethylene as a New Class of Highly Efficient Blue Emitting Materials for OLEDs

  • Park, Jong-Wook;Kim, Soo-Kang;Park, Young-Il;Kim, Kyoung-Soo;Choi, Cheol-Kyu;Lee, Sang-Do;Kim, Sang-Wook
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.363-367
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    • 2006
  • We synthesized new blue and bluish green emitting materials by using fully substituted ethylene moieties. Multi-layered EL devices were fabricated with synthesized materials and evaluated in terms of emission color and luminescence efficiency. BPBAPE[EML 4] having high $T_g$ of $155^{\circ}C$ showed luminance and power efficiency of 10.33cd/A and 4.0 lm/W without any doping agent. BTBPPA[EML 5] exhibited 5cd/A and 1.67lm/W efficiency with blue CIE value of (0.165, 0.195).

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Spin orbit torque detected by spin torque FMR in W/CoFeB bilayer

  • Kim, Changsoo;Moon, Kyoung-Woong;Chun, Byong Sun;Kim, Dongseok;Hwang, Chanyong
    • Journal of the Korean Magnetic Resonance Society
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    • v.23 no.2
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    • pp.46-50
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    • 2019
  • Spin orbit torque would be applied as the next generation of MRAM, so many researchers are interested in related field. To make a more efficient device, electric current should convert into spin current with high efficiency. Moreover, it becomes important to measure efficiency of spin orbit torque accurately. We measured spin torque FMR of W/CoFeB hetero structure system with direct current. The efficiencies of the damping like torque and field like torque were measured by using the linewidth and on-resonance field proportional to direct current. In addition, we analyzed that a quadratic shift of the on-response field was caused by the Joule heating.

Analysis on Design and Fabrication of High-diffraction-efficiency Multilayer Dielectric Gratings

  • Cho, Hyun-Ju;Lee, Kwang-Hyun;Kim, Sang-In;Lee, Jung-Hwan;Kim, Hyun-Tae;Kim, Won-Sik;Kim, Dong Hwan;Lee, Yong-Soo;Kim, Seoyoung;Kim, Tae Young;Hwangbo, Chang Kwon
    • Current Optics and Photonics
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    • v.2 no.2
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    • pp.125-133
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    • 2018
  • We report an in-depth analysis of the design and fabrication of multilayer dielectric (MLD) diffraction gratings for spectral beam combining at a wavelength of 1055 nm. The design involves a near-Littrow grating and a modal analysis for high diffraction efficiency. A range of wavelengths, grating periods, and angles of incidence were examined for the near-Littrow grating, for the $0^{th}$ and $-1^{st}$ diffraction orders only. A modal method was then used to investigate the effect of the duty cycle on the effective indices of the grating modes, and the depth of the grating was determined for only the $-1^{st}$-order diffraction. The design parameters of the grating and the matching layer thickness between grating and MLD reflector were refined for high diffraction efficiency, using the finite-difference time-domain (FDTD) method. A high reflector was deposited by electron-beam evaporation, and a grating structure was fabricated by photolithography and reactive-ion etching. The diffraction efficiency and laser-induced damage threshold of the fabricated MLD diffraction gratings were measured, and the diffraction efficiency was compared with the design's value.

A Productive Analysis of Sports Organizations in Korean Basketball League: Focused on DEA (한국프로농구구단의 생산성분석: DEA를 중심으로)

  • Kim, Seonmin
    • Journal of the Korea Safety Management & Science
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    • v.15 no.2
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    • pp.255-262
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    • 2013
  • Due to the competition between the various professional events, it is imperative for the team's management to improve efficiency by removing the inefficiencies of the professional team in order to gain a competitive edge. This study use different Data Envelopment Analysis (DEA) models to measure the efficiency of professional sport organizations. In this mathematical-analytical study, this study first reviews the related literature to analyze the input/output variables. In the end, the variables were detected and the data for this study were gathered from the Korean Basketball League (KBL). While previous studies examine relative efficiency of Korean Professional baseball teams by using CCR model, this study fully utilize the DEA method to investigate Korean professional sports organizations' operating problem. Thus, this study propose full results of DEA analysis such as efficiency score (overall, technical, and scale efficiency), slacks in inputs and outputs of inefficient organizations, Malmquist index) As a result, this study provides not only the exact productivity information of a team and a way of improving a firm's productivity with a decision maker.

Productivity Analysis of Spray Task in an International Airport

  • Kisi, Krishna P.;Kayastha, Rujan
    • International conference on construction engineering and project management
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    • 2022.06a
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    • pp.632-639
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    • 2022
  • The objective of this study is to analyze the productivity, efficiency, and factors affecting the productivity of a spray task from an international airport project. The study is focused on the productivity analysis of the Subcontractor whose job was to supply and apply sprayed-applied fire-resistive material (SFRM) on steel members to achieve the necessary fire ratings on the building structures of the Hamad International Airport, Qatar. The study analyzed the productivity of the four sprayer teams who completed the task at three locations and three areas of the airport. The study found that the productivity of the individual team observed during the SFRM spray task was not only different but was also observed different when they worked at varying floor heights where different factors affecting productivity were predominant. The study found that the efficiency was lowest (47.32%) when the spray team had to work at second-floor heights and factors affecting productivity such as limited accessibility for material movement and lifting, site congestion, lack of continuity of operation due to priority areas and frequent re-handling of machines and tools were present. Besides, the factors such as adverse weather conditions and sub-trades interference affected productivity at all locations. The findings show that productivity depends on multiple factors and those factors need to be identified and addressed to improve productivity. The findings also show that the estimated efficiency was hard to achieve but possible since Team 4 had 97% efficiency on the first floor of the airport.

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