• Title/Summary/Keyword: power delivery

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A Study on the Buyer's Specificity Requirement of the nature of the lack of the Conformity (매수인의 부적합 통지 내용의 상세정도에 관한 연구)

  • Heo, Kwang-Uk
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.39
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    • pp.27-55
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    • 2008
  • The concept of non-conformity is stipulated at Art. 35, CISG. According to the Art. 35, there is no directly stipulated concept of non-conformity. But Art. 35 said that the Seller must deliver goods which are of the quantity, quality and description required by the contract and which are contained or packaged in the manner required by the contract. Accordingly, the concept of non-conformity contains the conformity of quality, quantity, description, delivery of different goods and documents. Art. 39 does not specify the form of notice required. So parties can require a particular form by agreement. If there is no agreed form of notice, buyer' s notice must be sent by means appropriate in the circumstances. And Art. 39 states that the required notice of lack of conformity must be given to the seller. Notice of defects conveyed by the buyer to an independent third party is not found to have been given by means appropriate in the circumstances. And Art. 39 is subject to the parties' power under Art. 6 to derogate from or vary the effect of any provision of the Convention. When determining which requirement must be satisfied by the buyer is specifying the nature of any lack of conformity, a mixed objective-subjective standard should be applied, which has regard to the respective commercial situation of the buyer and the seller, to any cultural differences, but above all, to the nature of the goods. Also to determine the specificity requirement is to satisfy the purpose of notice of lack of conformity.

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Characterization of the Spiral Type Fault Current Limiters Using High-$T_c$ Superconducting Thin Films (나선형태로 제작된 고온초전도 한류기의 특성해석)

  • 정동철;박성진;강형곤;최효상;곽민환;임해용;황종선;최명호;추철원
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.14 no.6
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    • pp.518-524
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    • 2001
  • We report the current limiting properties of superconducting fault current limiters (SFCL). Our SFCL was patterned in a spiral type on a YB $a_2$C $u_3$$O_{7-x}$(YBCO) film deposited using rf sputtering techniques and was coated with a gold shunt layer in order to disperse the heat generated at hot spots in the YBCO film. Current increased up to 13.5 $A_{peak}$ at 60 Hz for the voltage of 13 $V_{peak}$, which is the minimum quench point, and increased up to 17.6 $A_{peak}$ at 60 Hz fo the voltage fo 141.4 $V_{peak}$. The quench completion time was 5 msec at 13 $V_{peak}$ and 4 msec at 141. $V_{peak}$ respectively. we think that this architecture using spiral-type SFCL can be useful for the protection of the power delivery systems from fault currents.s. currents.s.

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Development of Production Information System for Real-time Operation Brass-Pipe Production Machine (동파이프 생산 설비가동의 실시간 생산정보시스템 개발)

  • 정영득;김영균;박주식;강경식
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.27 no.1
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    • pp.1-8
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    • 2004
  • This study intend to make easy modification, even if there is a new job or structure change, by modularizing program and computerize and automation of production control management used in CIM. under the condition where manager control production on the job-site, for increasing connection with other operation and management on the computer by monitoring center computer, recognizing information by computer is needed, it is possible by converting transaction. So this study goal is to make delivery control and order control fast and accurate by finding dynamic history of machine and production information in enterprise without input production and quality information by themselves with quality information system. So production increase and quality improvement are possible by diminishing manager's and producer's work with the result of the study combining POP and CIM, after that, in e-business and m-business period that every enterprise must pass, customer satisfaction and sales promotion are possible with employee's computerizing minds. these study result also can knowledge process condition with theoretical class and have a power in finding a solution with foundation of theoretical knowledge.

Design of Sensor Network Security Model using Contract Net Protocol and DEVS Modeling (계약망 프로토콜과 DEVS 모델링을 통한 센서네트워크 보안 모델의 설계)

  • Hur, Suh Mahn;Seo, Hee Suk
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.4 no.4
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    • pp.41-49
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    • 2008
  • Sensor networks are often deployed in unattended environments, thus leaving these networks vulnerable to false data injection attacks in which an adversary injects forged reports into the network through compromised nodes. Such attacks by compromised sensors can cause not only false alarms but also the depletion of the finite amount of energy in a battery powered network. In order to reduce damage from these attacks, several security solutions have been proposed. Researchers have also proposed some techniques to increase the energy-efficiency of such security solutions. In this paper, we propose a CH(Cluster Header) selection algorithm to choose low power delivery method in sensor networks. The CNP(Contract Net Protocol), which is an approach to solve distribution problems, is applied to choose CHs for event sensing. As a result of employing CNP, the proposed method can prevent dropping of sensing reports with an insufficient number of message authentication codes during the forwarding process, and is efficient in terms of energy saving.

A Study on Introduction of Critical Chain Project Management(CCPM) to Construction Projects (건설 프로젝트에서의 CCPM 도입에 관한 연구)

  • Park Young-Min;Kim Soo-Yong;Im Hye-Man
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • autumn
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    • pp.427-431
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    • 2002
  • Nowadays in Korea, there has been extreme competition due to market reduction in the domestic construction industry. As a result every company try to change rapidly to secure competitive power, Although it isn't betterment for the way of construction project management then there has many problem such as a delay of the appointed date of delivery and go over the budget. In this study, we suggest an introduction of CCPM which is based on TOC to construction projects.

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Improvement of the Design-Build Bidding in the Domestic Construction Industry (국내 설계시공일괄입찰방식 개선방안)

  • Kim Su-Hyun;Jeon Min-Jeong;Koo Kyo-Jin;Hyun Chang-Taek
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • autumn
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    • pp.410-413
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    • 2003
  • In order to build up competitive power in construction market and to cope with international policy, Design-Build bidding is one of the viable bidding system, encouraging collaboration between design office and building construction firm. Design-Build is a promising delivery system to help expediting schedules, saving costs, and improving Quality. However, the problems of Design-Build project in the domestic construction industry are not to be able to take advantages of fast-tracking and value engineering process, because of the problems of inappropriate system and participants' inexperience. The purpose of this study is to suggest alternatives for Design-Build bidding of public sector in the domestic construction industry in the costs, quality and time aspect.

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Analysis of Digital Achilles Tendon of Scholarly Journals (학술지의 디지털 아킬레스건 분석)

  • 윤희윤
    • Journal of Korean Library and Information Science Society
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    • v.34 no.4
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    • pp.43-66
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    • 2003
  • Nowadays many academic libraries have considered and some have implemented the just-in-time(access) approach to collection development especially of scholarly journals. The adaption of the scholarly electronic journal based on access paradigm has brought a number of advantages and disadvantages to academic libraries. Electronic journals have promised rapid delivery of the latest research to the desktop through the ubiquitous platform of the Internet. But the promise of the e-journal is not yet a reality, and there are many misconceptions about what is actually available today. The objective of this paper is to analyse the probabilities of digital achilles tendon of scholarly journals resulting from a decline of purchase power, absence of selection(evaluation) criteria, superfluities and abuses of impact factor, access paradigm and halo effects, mismatching of demand-supply, md insufficiency in subject gateway functions.

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DEVELOPMENT OF AGRICULTURAL HYDRAULIC ROBOT(Part II) - Dynamic Characteristic of Hydraulic System

  • Mikio, Umeda;Michihisa, Iida;Kiyoshi, Namikawa
    • Proceedings of the Korean Society for Agricultural Machinery Conference
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    • 1993.10a
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    • pp.830-839
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    • 1993
  • Agricultural hydraulic robot which was reported in Part Ⅰ had been developed . The robot satisfied performance to intend before development. For actual use, however, it have been necessary to reduce manipulator weigh and to simplify construction of hydraulic control valve. Then, working stress of manipulator link and pressure fluctuation of hydraulic circuit were measured. Step and frequency response tests were done subject to amplitude of reference voltage of 0.1 , 0.3 , 0.5 and 1.0v. and delivery pressure of 3.5 and 5.0MPa. Working stress were about 25% comparing with fatigue strength, Thus, mass of manipulator might be reduce to 30 %. In hydraulic control system, virtual natural frequency of 6.5Hz is produced from the combination of drain passage area shortage of servovalve. Further , because of passage area shortage , working pressure at both side of cylinder was acted on. This phenomenon prevent utilize effectively engine power. Then, control valve for new model was p oposed.

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Development of a Peristaltic Micropump with Lightweight Piezo-Composite Actuator Membrane Valves

  • Pham, My;Goo, Nam-Seo
    • International Journal of Aeronautical and Space Sciences
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    • v.12 no.1
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    • pp.69-77
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    • 2011
  • A peristaltic micropump with lightweight piezo-composite actuator (LIPCA) membrane valves is presented. The micropump contained three cylinder chambers that were connected by microchannels and two active membrane valves. A circular miniature LIPCA was developed and manufactured to be used as actuating diaphragms. The LIPCA diaphragm acted as an active membrane valve that alternate between open and closed positions at the inlet and outlet in order to produce high pumping pressure. In this LIPCA, a lead zirconium titanate ceramic with a thickness of 0.1 mm was used as an active layer. The results confirmed that the actuator produced a large out-of-plane deflection. During the design process, a coupled field analysis was conducted in order to predict the actuating behavior of the LIPCA diaphragm; the behavior of the actuator was investigated from both a theoretical and experimental perspective. The active membrane valve concept was introduced as a means for increasing pumping pressure, and microelectromechanical system techniques were used to fabricate the peristaltic micropump. The pumping performance was analyzed experimentally in terms of the flow rate, pumping pressure and power consumption.

An Energy Efficient and Fair MAC Protocol Using Preamble Counting for Wireless Sensor Networks (무선 센서 네트워크의 MAC 프로토콜에서 에너지 효율성과 공정성 향상을 위한 기법 연구)

  • Lee, Dong-Ho;Chung, Kwang-Sue
    • Journal of KIISE:Information Networking
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    • v.35 no.2
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    • pp.149-157
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    • 2008
  • Since wireless sensor networks consist of nodes with the constrained battery, energy efficient MAC operation is one of the important issues. Low duty cycle operation is critical to conserve energy in wireless sensor network MAC protocol. Some paper proposed a new approach to low power listening, which employs a short preamble to further reduce energy consumption and to reduce latency. But short preamble suffers from unfair channel access problem since there was no consideration for contention between transmission nodes. Preamble counting proposes a solution to each of these problems by employing node selection information. Simulation results show that the preamble counting provides an improved energy efficiency and fairness of packet delivery.