• Title/Summary/Keyword: Draft system

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Experimental Study and Numerical Simulation of Cavity Oscillation in a Conical Diffuser

  • Chen, Chang-Kun;Nicolet, Christophe;Yonezawa, Koichi;Farhat, Mohamed;Avellan, Francois;Miyazawa, Kazuyoshi;Tsujimoto, Yoshinobu
    • International Journal of Fluid Machinery and Systems
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    • v.3 no.1
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    • pp.91-101
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    • 2010
  • Based on the one-dimensional stability analysis, the self-excited oscillation in hydraulic power generating systems was studied by a simple experiment and numerical simulation. It was shown that a cavity in a conical diffuser can cause surge. With the diffuser, a high amplitude and low frequency oscillation occurs at low cavitation number. This oscillation was not observed with the straight pipe. It was confirmed that the diffuser effect of the draft tube can be the cause of the full load surge in hydraulic power system. Numerical results were also analyzed to check the validity of the one-dimensional stability analysis.

Analysis and Development for Installation Safety Standard on Gas Boiler Exhaust System (가스보일러 배기시스템 설치 기준 분석 및 개발 (가스보일러 배기시스템 관련 설치 안전기준 개발II))

  • Lee, Soo-jeong;Choi, Kyoung suhk;Chae, Chung-keun;Kim, Ha na;Yun, Jin sun
    • 한국연소학회:학술대회논문집
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    • 2014.11a
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    • pp.111-112
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    • 2014
  • Exhaust gas boiler system with respect to national and international safety standards, comparative study best suited to the realities of local exhaust and exhaust system manufacturing, certification standards and gas boiler installation, management, and mip draft inspection standards will proceed through this study.

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Development of Guidelines for seismic isolation Design of LMR (액체금속로 면진설계를 위한 지침서 개발)

  • Yoo, Bong;Koo, Gyeong-Hoi;Lee, Jae-Han
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • 1998.04a
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    • pp.147-154
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    • 1998
  • The purpose of this paper is to propose the draft guidelines of seismic isolation design of Liquid Metal Reactor (LMR) using high damping laminated rubber bearings. The scopes of guidelines include design requirements of a seismically isolated system and components, seismic isolator, isolation system, interface system between seismic isolation and non-seismic isolation part, qualification and acceptance tests of seismic isolator, seismic isolation reliability, and seismic safety and monitoring system. Proposed guidelines shall be revised to extend to general design guideline for nuclear facilities by further research and discussions.

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Improving Archival Descriptive Standard Based on the Analysis of the Reviews by Archival Communities on RiC-CM Draft (RiC에 대한 기록공동체의 리뷰를 통해 본 기록물 기술표준 개선을 위한 제안)

  • Park, Ziyoung
    • The Korean Journal of Archival Studies
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    • no.54
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    • pp.81-109
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    • 2017
  • This study suggests an analysis of the reviews provided by international archival professionals on the RiC-CM draft published by ICA EGAD. Some implications for the Korean archival management environment were also suggested. Some professional reviews were accessible through the internet. Italian archival professionals held workshops at various levels for the analysis and discussion of the draft. Duranti, the project director of InterPARES, also gave opinions about the draft in cluding the perspective of digital preservation. In the review of Artefactual, the draft was discussed in terms of system implementation. Reed, the director of Recordkeeping Innovation, also gave a feedback based on the record management experiences in Australia. Some implications can be suggested based on these professional opinions. First, we should try to build a test bed for the adoption of RiC to archival description in the Korean environment. Second, a minimum level of data elements that can secure authenticity and integrity will also be needed. Third and lastly, rich authority data for agents and functions related to archival records and records groups are essential to take full advantage of the standard.

The Norwegian Forces' Gender Neutral Draft and Its Implication on the ROK Forces (노르웨이 성 중립 징병제와 한국군에 주는 시사점)

  • Cho, Sang Keun;Kim, In Chan;Hong, Myung Sook;Yu, Sun Young;Jeon, So Min;Park, Sang-Hyuk
    • The Journal of the Convergence on Culture Technology
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    • v.8 no.2
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    • pp.197-202
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    • 2022
  • Gender neutral draft is the system that the level of manpower which military demands right now can be kept and the concept of gender equality can enlarge itself. This thesis draws implications on the necessity of optional review of draft and the amelioration of military organizational culture for the military through the example of Norway that has adopted gender neutral draft initially in Europe. The Military that is characterized by traditionally male led domain accelerates itself the openness to female by the aggrandizement of social participation and the improvement of human right for female. The various concerns about a necessary facilities, the period ofmilitary service, the level of salary, the keeping of combat power, etc just should be overcome in order to enlarge conscription to female in Korea. Situations such as the environment of national security, the level of social participation to female, the treatment to minority are different, so it is difficult for us to draw any conclusion whether the adoption of sex neutral conscription is right or not. Nonetheless, the national strategy that prepares for future may not be concluded easily and we can not stop it even though it is discomfortable truth. In Conclusion, we anticipate that the sound discourse on measures of including female in draft will be continued from the start with this thesis.

The System Performance of Wireless CSMA/CA Protocol with Capture Effect

  • Dai, Jiang-Whai
    • Journal of Communications and Networks
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    • v.6 no.3
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    • pp.226-234
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    • 2004
  • This work presents a deterministic channel that rules according to inverse a power propagation law. The proposed channel model allows us to derive the lower bound and upper bound of packet's capture probability in Rayleigh fading and shadowing cellular mobile system. According to these capture probabilities, we analyze the system performance in the case of finite stations and finite communicated coverage of a base station. We also adopted a dynamic backoff window size to discuss the robustness of IEEE 802.11 draft standard. Some suggestions and conclusions from numerical results are given to establish the more strong CSMA/CA protocol.

Recent Developments : The Third Reading of the Revised Version of the UNCITRAL Arbitration Rules of 1976 (UNCITRAL의 최근 동향 : 1976년 UNCITRAL 중재규칙 개정안의 제3회독을 중심으로)

  • Kang, Pyoung-Keun
    • Journal of Arbitration Studies
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    • v.20 no.2
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    • pp.3-26
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    • 2010
  • In 2006, the UNCITRAL Working Group II started a new project on the revision of the UNCITRAL Arbitration Rules of 1976. Ever since that time, 9 sessions of the Working Group II were devoted to the discussions on such topic. The Arbitration Rules has been acknowledged to be used for settling international disputes involving various disputing parties. In recent years, many treaty-based arbitrations have been subject to the Arbitration Rules. This article focuses on the discussions made in the 52nd session of the Working Group II where the third reading of the revised draft of the Arbitration Rules was completed except for a few provisions. Among the draft rules, the delegations were hardly able to reach an agreement with regard to Articles 2(2), 34(2), 41(3), (4), and (6). It is expected that those provisions would be agreed in the coming 43rd plenary session of the UNCITRAL. The use of the Arbitration Rules is dependent on the agreement by the disputing parties. It is not like the UNCITRAL Model Law on International Commercial Arbitration which was adopted in Korean legal system in 1999. However, the proper functioning of arbitration rules is essential for the efficient and successful operation of the arbitration system in a particular country. That is the reason why we should keep close attention on the discussions of the UNCITRAL with regard to the revision of the Arbitration Rules.

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A Draft of Hull Piece Fabrication Line for Small and Medium Sized Shipyards by Object Oriented Analysis (객체지향분석에 의한 중소형 조선소 선체외판 생산설비 계획에 관한 연구)

  • 박명규;문귀호;김원돈
    • Journal of the Korean Institute of Navigation
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    • v.23 no.1
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    • pp.29-43
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    • 1999
  • The production process of the compound-curved hull plates includes hull design, definition, fairing, modeling, lofting, cutting, and forming in sequence. Traditional fabrication methods and shop environment caused low level to productivity in medium and small sized shipyards. The most effective solution to solve those problems is to rationalize the layout of facilities. For the well-balanced development of domestic shipbuilding industry, it is urgently required to reduce the gap between modernized large sized shipyards and traditional small and medium sized shipyards in production technologies and efficiencies. For the efficient and accurate hull piece forming, all information from design to forming should be clarified and organized in a systematic manner. Thus, management of the information plays an important role in the computerized and automated of hull piece forming. The object of this paper is to survey the status of the field, to find out the feasibility and to introduce a draft of hull piece fabrication line for small and medium sized shipyards. The development of required system follows the object oriented technology to extend to simulation based system for carrying out physical product flow and facilities layout analysis. It is feasible to operate such a modernized facility for a group of small and medium shipyards who are unable to have each of their own facility because of its large amount of initial investment and insufficient work load.

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A Study of Major Issues in the Act (Draft) on Remedy for Damage from Medical Accident and Medical Dispute Mediation, etc. (의료사고 피해구제 및 의료분쟁 조정 등에 관한 법률(안)의 주요 쟁점에 관한 고찰)

  • Park, Joon-Su
    • The Korean Journal of Health Service Management
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    • v.4 no.2
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    • pp.107-117
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    • 2010
  • In this paper, the researcher looked into major issues in the "Act (Draft) on Remedy for Damage from Medical Accident and Medical Dispute Mediation, etc." which was proposed by the Health & Welfare Committee, the National Assembly of the Republic of Korea, and which was pending with the Legislation & Judiciary Committee. Then the researcher pointed out worrisome problems therein and presented suggestion" to improve problematic situations. First of all, the researcher examined the following items which are major points in the aforementioned Act: 1) Establishment of Korea Medical Dispute Mediation and Arbitration Center, 2) Procedures for mediation and arbitration of medical disputes, 3) Establishment of Medical Injury Compensation Association, 4) Introduction of proxy payment for damages, 5) Compensation for no-fault medical accidents, 6) A system concerned with special cases on criminal punishment. Next, the researcher closely reviewed the following possible issues: 1) Limit of arbitrary mediation, 2) Postponement of the system concerned with special case on criminal punishment, 3) Examination of reasons for rejection, 4) Function and role of the Appraisal department, 5) A possibility of being reduced to an evidence collection procedure for lawsuit, 6) A possibility of no-fault compensation rather than injury compensation, 7) Operational issues related proxy payment for damages. Lastly, the researcher presented suggestions on how to improve each problematic issue.