• Title/Summary/Keyword: Team efficiency

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Relative efficiency and mesh selectivity of monofilament and twisted multifilament nylon gill net for Pacific saury, Cololabis saira, in the Northwest Pacific Ocean (북서태평양 꽁치 자망의 망지 재료에 따른 어획성능 및 망목선택성)

  • Jo, Hyun-Su;An, Doo-Hae;Koh, Jeong-Rack;Kim, Yeong-Seung;Park, Chang-Doo
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.42 no.4
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    • pp.195-202
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    • 2006
  • To determine the relative efficiency and mesh selectivity of gill net for the Pacific saury, Cololabis saira, a series of fishing experiments was carried out in the Northwest Pacific Ocean from August 13 to October 13 in 2002, using gill nets of different mesh size(30, 33, 35, 37, 39 and 42mm) constructed from two kinds of twine material(monofilament, twisted multifilament nylon web). The relative efficiency of two material gears was expressed as the ratio obtained by dividing monofilament catch by multifilament catch in number. The master selection curve of each material gear was estimated by applying the extended Kitahara's method. The catch of experimental gears is mostly Pacific saury(98.6%), Cololabis saira. The kinds of bycatch are common squid(0.7%), Pacific mackerel(0.6%), etc. Catch comparisons in the two gears showed that monofilament nylon nets are 1.7 times more efficient. The optimum values in monofilament and multifilament gill net for Pacific saury are 8.28 and 8.23, respectively.

Influence of Crystalline Si Solar Cell by Rie Surface Texturing (RIE 표면 텍스쳐링 모양에 따른 결정질 실리콘 태양전지의 영향)

  • Park, In-Gyu;Yun, Myoung-Soo;Hyun, Deoc-Hwan;Jin, Beop-Jong;Choi, Jong-Yong;Kim, Joung-Sik;Kang, Hyoung-Dong;Kwon, Gi-Chung
    • Journal of the Korean Vacuum Society
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    • v.19 no.4
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    • pp.314-318
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    • 2010
  • We fabricated a plasma texturing for multi-crystalline silicon cells using reactive ion etching (RIE). Multi-crystalline Si cells have not benefited from the cost-effective wet-chemical texturing processes that reduce front surface reflectance on single-crystal wafers. Elimination of plasma damage has been achieved while keeping front reflectance to extremely low levels. We will discuss reflectance, quantum efficiency and conversion efficiency for multi-crystalline Si solar cell by each RIE process conditions.

Balancing Efficiency and Flexibility in Software Project: The Role of Team Collective Improvisation, behavioral integration, and member diversity

  • Lee, Young-Joo;Lee, Jung-Hoon;Ham, Kyung Sun
    • Journal of Contemporary Eastern Asia
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    • v.16 no.1
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    • pp.22-45
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    • 2017
  • The successful management of software (SW) projects is a continuous concern to managers, which is attributed to the contradictory demands that most projects are facing; meeting user requirements within time and budget limit while flexibly dealing risks during the progress of the projects. The present study asserts project performance and risk mitigation are not tradeoff but to be achieved simultaneously, which is called SW project ambidexterity. Drawing on the literature on organizational behavior, hypotheses are developed speculating the relation among project performance, risk mitigation, team collective improvisation, team behavioral integration, and team diversity. Using empirical data collected from 102 SW project teams of 507 team members in South Korea, empirical analysis indicates team collective improvisation is a significant antecedent to SW project ambidexterity, playing a pivotal role to balance the contradictory demands. Furthermore, team behavioral integration positively influences the degree of team collective improvisation, and the magnitude of the relation is partially contingent on the team members' age and major diversity. The present study advances theory by providing a context specific explanation about the SW project ambidexterity and its precedents.

The Study of Particle Removal Efficiency (PRE) with Alkaline Ozonized Water (알칼라인 오존수를 아용한 입자제거에 관한 연구)

  • Lee, Seung-Ho;Kim, Tae-Gon;Lee, Jae-Hwan;Park, Jin-Goo;Bae, So-Ik;Lee, Gun-Ho;Kim, In-Jung
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2006.11a
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    • pp.362-363
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    • 2006
  • Ozonized DI water was supplied to make alkaline cleaning solutions to replace SCI chemicals in a bath with and without recirculation. With recirculation, low dissolved ozone and low pH cause lower particle removal efficiency (PRE) of 75%. However, direct supply of ozonized water with $NH_4OH$ to a bath without recirculation resulted in higher PRE over 93 %.

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Mesh selectivity of drum net traps for Buccinum opisoplectum Dall using SELECT model with unequal fishing and sampling efforts: A preliminary analysis (비균등한 어획노력량 및 샘플량인 경우의 SELECT 모델을 이용한 세고리물레고둥(Buccinum opisoplectum Dall)의 장구형 통발에 대한 망목선택성 : 예비분석)

  • Park, Hae-Hoon;Millar Russell B.;An Heui-Chun;Kim, Hyun-Young;Jeong, Eui-Cheol;Shin, Jong-Keun;Cha Bong-Jin;Kim, In-Ok
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.41 no.4
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    • pp.279-288
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    • 2005
  • The mesh selectivity of drum net traps for Buccinum opisoplectum Dall caught in the eastern sea of Korea was described. Several experiments were conducted between July 2003 and March 2004 and the data obtained from the experiment was fitted by SELECT (Share Each Length class's Catch Total) model with unequal fishing and sampling efforts. The selection curve was determined to be 'estimated fishing efficiency' by model deviance rather than AIC. However the fishing efficiency between 20mm and 35mm mesh size did not seem to be different. The $L_{50}$ lengths of the selectivity for the 55mm and 75mm mesh size were 65.4mm and 96.0mm, respectively.

Development of High-Definition PDP TV with High-Efficient Hexagonal Array Structure

  • Lee, Byung-Hak;Heo, Eun-Gi;Yoon, Cha-Keun;Lee, Kwang-Sik;Cho, Yoon-Hyoung;Yoo, Min-Sun
    • 한국정보디스플레이학회:학술대회논문집
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    • 2003.07a
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    • pp.347-350
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    • 2003
  • Optimization of the luminance, luminous efficiency, and address voltage margin characteristics has been made on the delta color array PDP with various hexagonal shape subpixels. The optimal subpixel and electrode designs are obtained for the 42-inch high-definition PDP ($1,366{\times}768$) with the fine pixel pitch less than 0.7 mm. The hexagonal delta array structure shows more improved characteristics than that of the normal delta array structure with rectangular shape subpixels.

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An Empirical Analysis of the Influence of Team Activity on the Knowledge Management Performance (팀 조직의 활동이 지식경영 활동 및 성과에 미치는 영향에 대한 실증적인 분석)

  • Kim, ChangHo;Lee, Kunchang;Chung, Namho
    • Knowledge Management Research
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    • v.6 no.2
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    • pp.91-108
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    • 2005
  • In recent years, organizations have chosen a team-organization as a standard activity level and it leads a significant change in process of knowledge producing. Nevertheless team-organization for building up effective performance and a good communication in organization has influenced knowledge management performance, the empirical analysis and survey have not proved yet. This study, therefore, makes an analysis that the change of organization base on team activity influences knowledge management performance. This study, based on 312 data by using LISREL as a model for studying, provides a result that a team-based activity positively influences knowledge management efficiency.

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Theoretical analysis of optimum refractive index profile and maximum transmission length of a GIPOF (GIPOF의 최적 굴절률 분포와 최대 전송거리에 대한 연구)

  • Jeong Hun;Kim Seung Taek;Gang Seong Bok;Lee Gyeong Gyun;Gang Hui Seok;Jo Yeong Jun
    • Proceedings of the Optical Society of Korea Conference
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    • 2003.07a
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    • pp.14-15
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    • 2003
  • Polymer optical fibers (POFs) are being considered as important high-speed communication media in the area of local area networks, datalinks and optical sensors. Large core diameter (500~1000 $\mu$m) and large numerical aperture (0.2~0.9) in a POF allow easy processing and connectorization, low cost high efficiency of beam coupling from LDs or LEDs, and complete immunity to EMI/EMR. There are many reports about 2.5 Gbps transmission the polymethylmethacrylate (PMMA) graded index (GI) POF over a distance of 100 m. (omitted)

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L-band Power Enhancement through the reinsertion of backward ASE filtered by a C/L-band coupler

  • Kim Seung Taek;Gang Seong Bok;Jeong Hun;Lee Gyeong Gyun;Gang Hui Seok;Jo Yeong Jun
    • Proceedings of the Optical Society of Korea Conference
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    • 2003.07a
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    • pp.20-21
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    • 2003
  • Erbium doped fiber (EDF) sources are useful devices for characterization of optical components for wavelength division multiplexing (WDM) fiber optic communication system. Therefore, there are many efforts to extend the bandwidth and to increase the power of the light source. Especially, L-band ASE source uses the low inversion state of EDF. It makes the power efficiency very low and needs a lot of fiber as several times as the fiber needed in C-band ASE generation. (omitted)

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