• Title/Summary/Keyword: SLACK

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Relationship between Ambidexterity Learning and Innovation Performance: The Moderating Effect of Redundant Resources

  • Wang, Dongling;Lam, Kelvin C.K.
    • The Journal of Asian Finance, Economics and Business
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    • v.6 no.1
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    • pp.205-215
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    • 2019
  • Researchers have confirmed the relationship between ambidexterity learning and innovation performance, but according to the resource-based theory, the relationship between ambidexterity learning and innovation performance is also affected by the internal resources of the organization. Internal resources are an important factor affecting the transformation of learning outcomes into performance. In addition, few scholars have pointed out whether different types of learning have different effects on different types of innovation performance. This study collects data from 170 High-tech enterprises in Shandong, china, and discusses the effects of exploitative learning and explorative learning on management innovation performance and technological innovation performance. This study further examines the moderating role of slack resource on the relationship between ambidexterity learning and innovation performance. Results show that ambidexterity learning has positive effect on innovation performance. Compared with exploitative learning, explorative learning has a greater impact on management innovation performance; compared with explorative learning, exploitative learning has a greater impact on technological innovation performances. Slack resource has positive moderating role between the relationship of exploitative learning, explorative learning and technology innovation performance. But Slack resource has no moderating role between the relationship of exploitative learning, explorative learning and management innovation performance.

Improvement of Variable Renewable Energy Penetration of Stand-Alone Microgrid Hosting Capacity by Using Energy-Storage-System Based on Power Sensitivity

  • CHOI, DongHee
    • Journal of Advanced Information Technology and Convergence
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    • v.10 no.2
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    • pp.91-101
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    • 2020
  • Recently, the demand for high penetration of variable renewable energy (VRE) penetration in a power system is increased. In consequence, distribution systems including microgrids confront the increased installation of VRE-based distributed generation. Despite of the high demand of VRE-based distributed generation in a distribution system, the installation of photovoltaic (PV) system in a distribution system has been restricted by various problems. In other words, the hosting capacity for high VRE penetration in a distribution system is limited. This paper analyzes the improvements of hosting capacity VRE penetration of stand-alone microgrid (SAMG) with energy storage system (ESS) by considering virtual-slack (VS) control based on power sensitivity. With the pre-defined power sensitivity, the ESS operates as virtual slack in the SAMG by controlling its bus voltage and phase angle indirectly. Therefore, the ESS enables the increase of VRE penetration in the SAMG. The proposed VS control is realized by analyzing the ESS as a virtual slack in power flow analysis based on power sensitivity. Then its validity is demonstrated with the case study on the SAMG in South Korea with practical data.

The Effect of Entrepreneurial Orientation, Learning Orientation and Dynamic Capability on International Performance: Moderating Effects of Slack Resource (중소기업의 기업가지향성, 학습지향성이 동적역량과 국제화 성과에 미치는 영향에 관한 연구: 여유자원의 조절효과를 중심으로)

  • Dong-Woo Ryu;Ki-Keun Kim
    • Korea Trade Review
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    • v.45 no.5
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    • pp.161-179
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    • 2020
  • The importance of entering the international market for small and medium-sized enterprises (SMEs) has been continuously emphasized. As a way to overcome these factors, prior studies have increased interest in dynamic capability. The purpose of this study is to investigate the effects of entrepreneurial orientation, learning orientation, and dynamic capability on their international performance of SMEs. Drawing on an extensive review of the literature on dynamic capability view and internationalization, hypotheses are developed and tested using a sample of 214 SMEs in South Korea. Structural equation modeling was applied. As a result of analysis, first, dynamic capability has a significant effect on international performance. Second, entrepreneurial orientation has significant influence on dynamic capability. Third, learning orientation has significant influence on dynamic capability. Lastly, slack resource was found to moderate the relationship between dynamic capability and international performance. The results indicate that their entrepreneurial orientation and learning orientation ware driver of their dynamic capability. and that their dynamic capability was significant driver of their international performance. In the final conclusion, implications and limitations of research and suggestions for future research are discussed.

Crosstalk Glitch Elimination Algorithm for Functional Fault Avoidance (기능적 오류방지를 위한 크로스톡 글리치 제거 알고리즘)

  • Lee, Hyung-Woo;Kim, You-Bean;Kim, Ju-Ho
    • Proceedings of the IEEK Conference
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    • 2004.06b
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    • pp.577-580
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    • 2004
  • Our paper focus on crosstalk noise problem, especially crosstalk glitch that occurs when victim is stable state and aggressor is transitive state. This generated glitch weigh with the functional reliability if the glitch is considerable. In this paper, we use buffer insertion, down sizing, buffer insertion with up-sizing methods concurrently. These methodologies use filtering effects which gates that have bigger noise margin than glitch width eliminates glitch. In addition, we do limited optimization in boundary of node's slack. Therefore, the operated node's changes are for nothing in other node's slack.

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Imprecise Computation based Scheduling for QoS Support in Multimedia Systems (멀티미디어 시스템에서 QoS 지원을 위한 불확정계산 기반의 스케줄링)

  • Kim, Tae-Su;Kim, Yong-Seok
    • Proceedings of the IEEK Conference
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    • 2005.11a
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    • pp.995-998
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    • 2005
  • A task in imprecise computation consists of mandatory part and optional part. The optional part can be executed partially and the quality of service is measured by the amount of the execution. Many paper showed that multimedia systems are good applications of imprecise computation. It is important to guarantee QoS which is a critical factor in multimedia systems. Previous works didn't consider QoS and processor slack were assigned randomly to tasks. This paper presented a systemic slack assignment method according to QoS levels of tasks. A simulation result showed that our method can be a good choice for multimedia systems with QoS requirement.

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Geometric Constraints Exploration for Timing-Driven Placement (타이밍이 고려된 배치를 위한 기하적인 제약조건 탐색)

  • Lee, Jae-Hoon;Cho, Jun-Dong
    • Proceedings of the Korean Information Science Society Conference
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    • 2007.10c
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    • pp.375-379
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    • 2007
  • 고성능 VLSI 설계 시 배치 후를 포함한 전체적인 설계 과정이 완성되기 전까지는 물리적인 정확한 설계의 특성은 배치 단계에서는 알기 어렵다. 따라서 주어진 성능 (시간적 제약조건)을 만족하는, 즉, timing-driven placement (타이밍이 고려된 배치)는 1.0 미크론 이하의 초미세한 설계에서 중요하게 되었다. 타이밍을 고려한 배치는 초기 레이아웃 디자인 단계에서 타이밍 제약조건에 의해 디자인 반복을 줄인다. 하지만 대부분의 배치 단계의 디자인 모델은 배치단계에서 기하학적인 면을 고려하여 최대허용 지연시간 (Slack 이라고 부름)과 같은 물리적인 디자인 효과를 분석하기 어려운데 이것은 물리적으로 정확한 특성이 이 단계에서 알려지지 않기 때문에 당연한 결과이다. 본 논문에서는 기하적인 요소를 고려한 Slack의 재분배의 이점을 이용하여 허용 지연시간 처리의 혁신적인 방법을 제안한다. 제안된 접근법은 timing-closed 솔루션을 쉽게 찾는데 도움을 주고 이는 디자인을 반복하는 시간을 절약할 수 있게 한다.

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Optimization of Fuel-cell stack design using CFD-ACE (CFD-ACE를 이용한 연료 전지 냉각판의 최적 설계)

  • 홍민성;김종민
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2003.10a
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    • pp.14-18
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    • 2003
  • Feul-cell system consists of fuel reformer, stack and energy translator. Among these parts, slack is a core part which produces electricity directly. In order to set a stack module, fabrication of appropriate stack, design of water flow path in stack, and control of coolant are needed. Especially, water or air is used as a coolant to dissipate heat. The different temperature of each electric cells after cooling and the high temperature of the stack affect the performance of the stack, Therefore, it is necessary that the relationship between coolant, healing rate, width of slack, properties of stack, and the shape of water flow path must be understood. For the optimal design, the computational simulation by CFD-ACE has been conducted and the resulting database has been constructed.

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Expended Hybrid Real-Time Scheduling Algorithm for guard Deadline of An Periodic Task (주기 태스크의 종료시간을 보장하기 위한 확장된 혼합 실시간 스케쥴링 알고리즘)

  • 한대만;최만억;구용완
    • Proceedings of the Korean Information Science Society Conference
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    • 1999.10c
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    • pp.161-163
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    • 1999
  • 본 논문은 고정 우선순위를 가지는 주기 태스크와 동적으로 발생하는 비주기 태스크를 스케쥴링하는 방법으로 슬랙 스틸링(slack stealing) 알고리즘을 소개하고 발생되는 문제점으로부터 새로운 알고리즘을 제시한다. 기존의 실시간 스케쥴링 알고리즘을 RM 스케쥴링에 의해 할당된 주기 태스크의 우선순위가 동적으로 발생하는 비주기 태스크의 수행으로 인한 주기 태스크들간의 긴급함에 적절하게 대응하지 못하고 주기 태스크들이 자신의 제한시간을 넘길 수 있다. 이는 슬랙 스틸링(slack stealing) 알고리즘에서 슬랙 타임을 구하는 함수의 한 요소로서 주기 태스크의 필요 계산시간 값이 긴급하지 않은 상위 우선 순위 태스크의 계산시간 까지 포함하는데 있다. 따라서 제안한 확장된 실시간 스케쥴링 알고리즘은 RM 스케쥴링에 의한 스케쥴링 가능성을 위배하지 않으면서 동적으로 발생하는 비주기적 태스크로부터 긴급도의 변화에 적응할 수 있는 우선 순위 체제의 알고리즘을 제시하고, 제안한 알고리즘이 다른 실시간 알고리즘보다 성능 개선이 있음을 모의 실험을 통하여 증명한다.

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Effectiveness of a Vehicle Restraint System in Frontal Crash (정면 충돌시 차량 구속 시스템의 효과)

  • Lee, Dong-Jae;Oh, Kwang-Seok;Son, Kwon
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.314-314
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    • 2000
  • This study deals with the analysis of the effectiveness of a safer belt in frontal crash. ATB, Articulated Total Body, program is used as a dynamics solver of the occupant model. ATB is a public code, however, the program is somewhat cumbersome to use due to lack of sufficient user interface. A preprocessor and a postprocessor are, therefore, developed for a user friendly graphic interface in Windows environment. Dialog boxes are used for an interface with GEBOD, Generator of Body Data, for human anthropometry and with ADAMS for vehicle dynamics. It is found through three test simulations that simulated results are in good agreement with those obtained by ATB. The effect of the initial slack of safety belt is investigated for frontal crash using the developed program.

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A Comparative Study on the Efficiency of Service Quality Management System : Focused on the SQI of City and Provincial Office (서비스 품질경영시스템의 효율성 비교분석에 관한 연구 : 시청과 도청의 서비스품질 만족도지수를 중심으로)

  • Yoo, Han-Joo;Song, Gwang-Suk
    • Journal of Korean Society for Quality Management
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    • v.35 no.3
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    • pp.21-36
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    • 2007
  • This article is to analyze the service efficiency of public sector using Data Envelopment Analysis(DEA). We tried to measure the public service quality and overall satisfaction by using several DEA models, degree of combination and top2box which is a little bit different methodology from traditional ones. We used CCR, Super-efficiency and Slack based measure(SBM) model in DEA to measure public service efficiency of the 16 public institutions(7 City Halls and 9 Provincial offices). Since the traditional method based on the measurement model(CCR, BCC) has the fundamental problems without taking account of the existence of slacks inputs and outputs in several efficient units, we suggest to measure the exact amount of efficiency and inefficiency of the public sector and rank analysis many efficient units exactly through the slacks-based measure model(SBM)