• Title/Summary/Keyword: Resolving power

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A Study on the two systems for Commercial Disputes Resolution (상사분쟁해결제도의 이원화(二元化)에 관한 일고(一考))

  • Sin, Han-Dong
    • Journal of Arbitration Studies
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    • v.8 no.1
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    • pp.123-148
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    • 1998
  • Recently many controversies originate for varies reasons, ranging from normal market competition to honest disagreements about rights. Disputes also arise from the clash between institutions and individuals. A free society should provide many systems for resolving controversies. We think of the courts as being primary, but, of course, they are not. In Korea, and in most other parts of the world, disagreements are resolved informally, without the need for judicial intervention. Settlements are worked out privately, usually without lawyers and certainly without judges. Most of judges are finding it difficult to cope with the needs and demands of society. Many businessmen who no longer want to get involved in lawsuits, are looking for alternative methods for resolving their disputes. However, there are actually two systems, litigation and arbitration only, to resolve disputes with binding both parties concerned. Litigation emphasizes on the equity and the justice with allowing three time's judgment for the resonable resolution, and arbitration, which is not subject to appeal, stress on the economic settlement rather than justice. Arbitration process results in a final and binding decisions. Although arbitration is a voluntary procedures that is created by the parties themselves, arbitration differs from mediation and conciliation because of its binding power. Arbitration is today coming into fashion as our primary methods for settling disputes. No company wants to have its funds tied up for long periods. Many parties prefer that the decision be final, rather than facing the prospect of extended appellate litigation. Therefore, government must encourage parties to settle their disputes by arbitration instead of litigation.

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Design of an Automatic Generation System for Embedded Processor Cores with Minimal Power Consumption (저전력 소모 임베디드 프로세서 코어 자동생성 시스템의 설계)

  • Kim, Dong-Won;Hwang, Sun-Young
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.32 no.10C
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    • pp.1042-1050
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    • 2007
  • This paper describes the system which automatically generates power-minimized embedded cores from MDL descriptions. An automatic generation system is constructed which generated embedded cores which consumes less power for application programs. From the usage information on pipeline stages for each instruction, the proposed system generates embedded cores with the capability of detecting/resolving pipeline hazards. The generated cores are configured such that the power consumption is minimized. The proposed system has been tested by generating HDL codes for ARM9, MIPS R3000 architectures. Experimental results show functional accuracy of the generated cores, and show that power reduction of $20%{\sim}40%$ has been observed for benchmark programs.

Development of medium resolution cross-dispersed silicon grisms in the Near Infrared ; Direct Silicon wafer bonding technique

  • Jeong, Hyeon-Ju;Wang, Wei-Song;Gully-Santiago, Michael;Deen, Casey;Pak, Soo-Jong;Jaffe, Daniel T.
    • The Bulletin of The Korean Astronomical Society
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    • v.36 no.2
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    • pp.125.2-125.2
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    • 2011
  • We are developing medium resolution cross-dispersed silicon grisms in the near IR region ($1.45{\sim}5.2{\mu}m$). The grisms will be installed in MIMIR, a multifunction instrument at the Lowel Observatory, USA. The two devices are designed to cover H and K band and L and M band simultaneously. Our goal is to make grism with R=3000 at 1.2 arcsec slit. The Silicon has high refractive index (n=3.4 at $1.5{\mu}m$) which enhances the resolving power by up to 5 times when compared to conventional material such as BK-7 (n=1.5 at 1.5 ${\mu}m$). The bonded grisms will be installed in a filter wheel for the uses switch from spectroscopic mode to imaging mode easily. Our device is compact and light weighted while it provides a decent resolving power. We produce monolithic grisms using e-beam lithography at the NASA JPL and chemically etching the grooves on the silicon prisms. Moreover, the main-disperser and cross-disperser will be contacted together by direct Si-Si bonding technique and eventually turn into one piece. The bonded pair offers more stability in terms of the layout of the spectrum and removes the Fresnel loss at the intersection of two grisms. We report on the proper wafer bonding steps through this research, and inspected the bonding quality thermally, optically and mechanically.

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The Maximum Installable DG Capacity According to Operation Methods of Voltage Regulator in Distribution Systems (배전계통의 전압조정기 운영방법에 따른 분산형전원 최대 도입 용량 산출)

  • Kim, Mi-Young
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.7
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    • pp.1263-1269
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    • 2009
  • Stable and sustainable power supply means maintaining a certain level of power quality and service while securing energy resource and resolving environmental issues. Distributed generation (DG) has become an essential and indispensable element from environmental and energy security perspectives. It is known that voltage violation is the most important constraint for load variation and the maximum allowable DG. In distribution system, sending voltage from distribution substation is regulated by ULTC (Under Load Tap Changer) designed to maintain a predetermined voltage level. ULTC is controlled by LDC (Line Drop Compensation) method compensating line voltage drop for a varying load, and the sending voltage of ULTC calls for LDC parameters. The consequence is that the feasible LDC parameters considering variation of load and DG output are necessary. In this paper, we design each LDC parameters determining the sending voltage that can satisfy voltage level, decrease ULTC tap movement numbers, or increase DG introduction. Moreover, the maximum installable DG capacity based on each LDC parameters is estimated.

Effects of Cooperative Orientation and Relationship Power on Conflict Resolution Strategy and Relationship Performance (프랜차이즈 본사의 협동지향성과 관계파워가 갈등해결전략과 신뢰 그리고 관계성과에 미치는 영향)

  • Han, Sang-Ho
    • The Korean Journal of Franchise Management
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    • v.8 no.2
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    • pp.17-24
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    • 2017
  • Purpose - In recent years, research has been conducted on the conflict resolution strategies of the franchise headquarters and the franchisees, but there is a lack of research on how the power structure and cultural factors play a role in resolving conflicts. From this perspective, this study is to examine the structural relationship between franchisors' cultural orientation and relationship power, and conflict resolution strategies, relationship trust, and relationship performance using. The findings of this study suggest how franchise headquarters should establish long-term relationship with franchisees and share information. Research design, data, methodology - The data were collected from April 1 to April 15, 2013. Because this study examined franchise industries from the franchisee perspective, we contacted franchisee store owner and managers located in Seoul and Gyeonggi Province. Interviewers trained contacted a total of 200 franchisees, and 196 franchisees responded. Out of 196 respondents, 13 respondents were deleted due to missing information. Thus, a total of 183 franchisee were used for this study. he data were analyzed using frequency analysis, confirmatory factor analysis, correlation analysis, and structural equational modeling with SPSS 24.0 and Amos 23.0 statistical program. Results - The results showed that cooperation orientation and relational power of franchisor had significant effects on conflict resolution strategies. Cooperating, obliging, and compromising strategies of conflict resolution strategy had significant effects on relationship trust. Also, relationship trust had significant effect on relationship performance. Conclusions - This study shows that the franchise headquarters and the franchisees share necessary information for common purposes and that continuous two-way communications play an important role in resolving conflicts. In other words, the result of this study suggests that if the franchise headquarters and the franchisee actively consider the position of the other party and strive to achieve the goal, conflict resolution may be more successful. In order to do this, the franchise headquarters will have to consider how to build and maintain continuous communication with the franchisees, and continuous education is also needed so that employees can have a cooperative attitude. However, since the culture of these organizations is not made up of simple staff training and is not formed within a short time, the CEO of the franchisee headquarters should take the lead in establishing a cooperative culture with the merchants over the long term.

Study on Very High-Rate Power Line Communications for Smart Grid (스마트그리드를 위한 초고속 전력선통신기술 연구)

  • Choi, Sung-Soo;Oh, Hui-Myoung;Kim, Young-Sun;Kim, Yong-Hwa
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.6
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    • pp.1255-1260
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    • 2011
  • In this paper, we study on the reliability of Very High-rate Power Line Communication (VH-PLC) for Smart Grid, so that the resultant data rate is over 400Mbps at a physical layer. Firstly, reviewing the research trend of the PLC, we discuss the required techniques for supporting the Smart Grid. Considering a pre-specification with the value of several parameters, we investigate a multi-carrier modulation technique to overcome limitations of higher rate transmission under power line channel environments. Then, we propose a system specification of the VH-PLC in the sense of enhancing two features. One is resolving the problem of the co-existence of the deployed high-speed PLC according to the published standardization of KS X 4600-1 in Korea. The other is getting better performance on the grid adopting the diverse element techniques, such as multi-carrier modulation, a subcarrier utilization mode, a variable rate LDPC (Low Density Parity Check) code, and a time and frequency diversity technique. Further, a simulation tool, composed of an Event-Driven simulator and a Time-Driven simulator, is developed for the purpose of verifying the system performance and continuously cross-checking the test bench signal of the proposed VH-PLC system.

A Study on the Application of Under Voltage Load Shedding Scheme in Line Contingency considering Motor Load (모터부하를 고려한 상정사고 발생 시 저전압 부하차단 적용 방안에 대한 연구)

  • Lee, Yun-Hwan
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.66 no.1
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    • pp.21-26
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    • 2017
  • Failure of high-voltage transmission line, which is responsible for large-scale power transmission, can be reason for system voltage instability. There are many methods to prevent voltage instability like adjustment of equipment, the generator voltage setting, and load shedding. Among them, the load shedding, have a problem of economic loss and cascading effect to power system. Therefore, the execution of load shedding, amount and timing is very important. Conventionally, the load shedding setting is decided by the preformed simulation. Now, it is possible to monitor the power system in real time by the appearance of PMU(Phasor Measurement Unit). By this reason, some of research is performed about decentralized load shedding. The characteristics of the load can impact to amount and timing of decentralized load shedding. Especially, it is necessary to consider the influence of the induction motor loads. This paper review recent topic about under voltage load shedding and compare with decentralized load shedding scheme with conventional load shedding scheme. And simulations show the effectiveness of proposed method in resolving the delayed voltage recovery in the Korean Power System.

Utilizing Under Voltage Load Shedding Strategy to Prevent Delayed Voltage Recovery Problem in Korean Power System

  • Lee, Yun-Hwan;Oh, Seung-Chan;Lee, Hwan-Ik;Park, Sang-Geon;Lee, Byong-Jun
    • Journal of Electrical Engineering and Technology
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    • v.13 no.1
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    • pp.60-67
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    • 2018
  • The presence of induction motor loads in a power system may cause the phenomenon of delayed voltage recovery after the occurrence of a severe fault. A high proportion of induction motor loads in the power system can be a significant influence on the voltage stability of the system. This problem referred to as FIDVR(Fault Induced Delayed Voltage Recovery) is commonly caused by stall of small HVAC unit(Heating, Ventilation, and Air Conditioner) after transmission or distribution system failure. This delayed voltage recovery arises from the dynamic characteristics associated with the kinetic energy of the induction motor load. This paper proposes the UVLS (Under Voltage Load Shedding) control strategy for dealing with FIDVR. UVLS based schemes prevent voltage instability by shedding the load and can help avoid major economic losses due to wide-ranging cascading outages. This paper review recent topic about under voltage load shedding and compare decentralized load shedding scheme with conventional load shedding scheme. The load shedding strategy is applied to an actual system in order to verify the proposed FIDVR mitigation solution. Simulations demonstrate the effectiveness of the proposed method in resolving the problem of delayed voltage recovery in the Korean Power System.

A New Random SPWM Technique for AC-AC Converter-Based WECS

  • Singh, Navdeep;Agarwal, Vineeta
    • Journal of Power Electronics
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    • v.15 no.4
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    • pp.939-950
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    • 2015
  • A single-stage AC-AC converter has been designed for a wind energy conversion system (WECS) that eliminates multistage operation and DC-link filter elements, thus resolving size, weight, and reliability issues. A simple switching strategy is used to control the switches that changes the variable-frequency AC output of an electrical generator to a constant-frequency supply to feed into a distributed electrical load/grid. In addition, a modified random sinusoidal pulse width modulation (RSPWM) technique has been developed for the designed converter to make the overall system more efficient by increasing generating power capacity and reducing the effects of inter-harmonics and sub-harmonics generated in the WECS. The technique uses carrier and reference waves of variable switching frequency to calculate the firing angles of the switches of the converter so that the three-phase output voltage of the converter is very close to a sine wave with reduced THD. A comparison of the performance of the proposed RSPWM technique with the conventional SPWM demonstrated that the power generated by a turbine in the proposed approximately increased by 5% to 10% and THD reduces by 40% both in voltage and current with respect to conventional SPWM.

Stable Power Plan Technique for Implementing SoC (SoC 구현을 위한 안정적인 Power Plan 기법)

  • Seo, Young-Ho;Kim, Dong-Wook
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.16 no.12
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    • pp.2731-2740
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    • 2012
  • ASIC(application specific integrated circuit) process is a set of various technologies for fabricating a chip. Generally there have been many researches for RTL design, synthesis, floor plan & routing, low power scheme, clock tree synthesis, and testability which are widely researched in recent. In this paper we propose a new methodology of power strap routing in basis of design experience and experiment. First the power strap for vertical VDD and VSS and horizontal VDD and VSS is routed, and then after the problems which are generated in this process are analyzed, we propose a new process for resolving them. For this, the strap guide is inserted to protect the unnecessary strap routing and dumped for next steps. Next the unnecessary power straps which are generated the first inserting process are removed, and the pre-routing is performed for the macro cells. Finally the resultant power straps are routed using the dumped routing guide. Through the proposed process we identified the efficient and stable route of the power straps.