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Parameter Estimation of the Storage Function Model: 2. Applicability of the Universal Model (저류함수법의 매개변수 추정: 2. 범용모형의 적용성)

  • Choi, Jong-Nam;Ahn, Won-Shik;Kim, Hung-Soo;Park, Min-Kyu
    • Journal of the Korean Society of Hazard Mitigation
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    • v.10 no.6
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    • pp.131-138
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    • 2010
  • We verified the applicability of the developed universal model for the parameter estimation through the rainfall-runoff analysis at 16 watersheds. The existing parameter estimation equations derived from the restricted conditions sometimes, gave the meaningless results which cannot reflect the watershed characteristics and so have not widely used in the ungaged watershed. The values estimated from the developed universal model showed which are sensitive to variations of watershed characteristics. Wider applicability of SFM in ungaged watersheds is expected with the used of effective rainfall from CN method and the universal model.

Development of the Integrated Information System for 3D Product Design/RP/CAE/3D Mold Design/Tooling (3차원 설계/RP/CAE/3차원 금형설계/제작 정보일원화시스템 개발)

  • 윤정호;전형환;안상훈;조명철
    • Korean Journal of Computational Design and Engineering
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    • v.2 no.1
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    • pp.35-43
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    • 1997
  • Concurrent Engineering is one of the methods which are used for the rapid product development. One of the important features in Concurrent Egineering is that the development process is to be parallel and the organization should be cross-functional. In order that the process be parallel and that the organization be cross-functional, an integrated information system such as PDM (Product Data Management) is required. Although the integrated data base is constructed, it could be meaningless if the application softwares were not inter-operable. This study shows an example of intergrated information system from three-dimensional product design to mold design and tooling for the development of Deflection Yoke(DY) which is one of the important parts of Cathode Ray Tube(CRT). A three-dimensional product design software, which is based on a commercial code, has been developed by ourselves. Selective Laser Sintering(SLS), which is one of the rapid prototyping techniques, has been used in this study. Mold design has been done by the three-dimensional way. A newly developed method of mold tooling, which is called Quick Die Manufacturing(QDM), has been introduced.

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A Study on the Detection of Hazardous Weather Conditions by a Doppler Weather Radar (도플러 레이다를 이용한 기상위험 탐지에 관한 연구)

  • 이종길
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.19 no.3
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    • pp.533-542
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    • 1994
  • In a Doppler weather radar, high resolution windspeed profile measurements are needed to provide reliable detection of a hazardous weather condition. For this purpose, the pulse-pair method is generally considered to be the most efficient estimator. However, this estimator has some bias errors due to asymmetric spectra and may yield meaningless results in the case of a multimodal return spectrum in this paper, bias errors were analyzed and an improved method was suggested to reduece these errors. For the case of a multimodal or seriously skewed spectrum, the modes of spectrum may provide more reliable information than the statistical mean. Therefore, the idea of a relatively simple mode estimator is also developed.

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Reasonable Hardware Design Methods for 2-Wheeled Mobile Robots : Based on Segway Type Mobile Robots (2륜 이동로봇의 합리적인 하드웨어 설계 노하우 : 세그웨이를 중심으로)

  • Joh, Jung-Woo;Park, Gwi-Tae
    • Proceedings of the IEEK Conference
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    • 2009.05a
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    • pp.109-111
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    • 2009
  • In this paper, we discuss how to design 2-wheeled mobile robot hard wares as reasonable and practical as possible. A segway type mobile robot consists of 2 wheels only, placed in parallel rather than horizon. 2-wheeled mobile robots make you overcome high cost and time consuming maintenance procedures of the robot by reducing the number of robot hardwares. The most challenging thing in a 2-wheeled mobile robot that has many more valid virtues than the traditional mobile robots is to make it balance itself whenever it stands still or goes forward. But balancing itself is not an easy matter and there are many researches and experiments on this issue. When researchers test theories on 2-wheeled mobile robots to improve its self balancing performance, they should consider how to design hard wares of that mobile robot. No matter how great those new theories are, if a testbed for those theories is not suitable, performance output would be poor and meaningless. In this point of view, to design a proper 2-wheeled mobile robot as a testbed is a very important issue with development of new theories. So we define 4 guide lines to design segway type mobile robots reasonably; about motor, battery, and MCU selection and shock-proof design with robust motor setting.

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Preferences for Care near the End of Life according to Chronic Patients' Characteristics (만성질환자의 특성에 따른 생애말기치료 선호도)

  • Yun, Seonyoung;Kang, Jiyeon
    • Korean Journal of Adult Nursing
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    • v.25 no.2
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    • pp.207-218
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    • 2013
  • Purpose: The purpose of this study was to explore the chronic patients' preferences for care near the end of life. Methods: This is a descriptive survey research, with subjects of 161 outpatients with hypertension, diabetes mellitus or chronic renal failure. Results: The majority of the subjects do not want meaningless life sustaining treatment and they report thinking positively about family or health care professional to participate in their end of life decision making process. Subjects reported preferring adequate pain management and spiritual support at the end of life. In regard to advance directives (ADs), those subjects with chronic disease report thinking positively about the necessity of ADs and its institutionalization. However, the subjects report not having the detailed information on the proper time and method of writing their ADs. Conclusion: Based on these results, educational programs on end of life decision making for chronic patients need to be developed. Also, the nurse should try to reflect the opinion of chronic patients as much as possible when make an end-of-life decision.

A Study on Flexibility of Movable Exhibition through Biomimicry Notion (바이오미미크리 개념을 통한 이동식 전시의 가변성에 대한 연구)

  • Lee, Yong-Jin;Yoon, Sang-Young;Cho, Kyoung-Young
    • Korean Institute of Interior Design Journal
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    • v.20 no.5
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    • pp.78-86
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    • 2011
  • The world is suffered from severe environmental problems such as climate change and global warming due to radical industrialization after the Industrial Revolution. With advancement of science and information technologies, national borders have become meaningless. In this global trend, movable exhibition shall be supposed to pursue "Local in Global." Thus, movable exhibition should get involved in an effort to find a cultural identity in the globalization and to better our position among the various cultures. As an alternative, movable exhibition can be established by combining biomimicry, which is biomimicry of life by imitating biological system, with Flexibility of movable space. By providing a hint to environmental problems and cultural uncertainty, this alternative will generate an advanced exhibition trend that is more environmental-friendly and more efficient. As a cumulative concept created by the nature for 3.8 billion years, biomimicry has evolved a lot more than the modern science. By catching this point, "A study on flexibility of movable exhibition through biomimicry notion" is providing a revolutionary paradigm stepping beyond the current exhibition trend, which pursues coexistence of human beings and the nature and, at the same time, introduces our culture.

Friend Recommendation Scheme Using Moving Patterns of Mobile Users in Social Networks (소셜 네트워크에서 모바일 사용자 이동 패턴을 이용한 친구 추천 기법)

  • Bok, Kyoungsoo;Seo, Kiwon;Lim, Jongtae;Yoo, Jaesoo
    • The Journal of the Korea Contents Association
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    • v.16 no.4
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    • pp.56-64
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    • 2016
  • With the development of information technologies and the wide spread of smart devices, the number of users of social network services has increased exponentially. Studies that identify user preferences and recommend similar users in these social network services have been actively done. In this paper, we propose a new scheme to recommend social network friends with similar preferences through the moving pattern analysis of mobile users. The proposed scheme removes the meaningless trajectories via companions, short time trajectories, and repeated trajectories to determine the correct user preference. The proposed scheme calculates user similarity using the meaningful trajectories and recommends users with similar preferences as friends. It is shown through performance evaluation that the proposed scheme outperforms the existing schemes.

The Revocation of the International Commercial Arbitral Award by the Chinese Court (중국법원의 섭외상사중재판정의 취소)

  • Lee, Shie-Hwan
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.31
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    • pp.107-134
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    • 2006
  • Enforcement of an arbitration award is an extremely important issue in arbitration. Arbitration, as a dispute settlement process, is rendered meaningless if it is not possible to enforce an award rendered by an arbitration tribunal. On the other hand, the present international arbitration system guided by the New York Convention and UNCITRAL Model Law is established on the dual supervision from the national courts. The nationality of the international arbitral award closely relates to the supervision of the national court, and the national court is entitled to decide the nationality of the international award in accordance with the conditions set in its own domestic law. The national court may set aside arbitral award made in its territory while the foreign court may refuge enforcement of foreign arbitral awards according to its own law and international convention to which it is a party. The conditions set in the Arbitration Law of the People's Republic of China are in agreement with those set in the UNCITRAL Model Law. The Chinese national court is entitled to set aside international awards made in China in accordance with the Chinese Law. The purpose of this paper is to clarify the Chinesr practice on the revocation of international commercial arbitral awards.

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Performance Evaluation of Left-Comer and Look-Ahead Chart Parsing for Small-Sized Context Free Grammar (소규모 문맥 자유 문법에 대한 Left-Corner / Look-Ahead 차트 파싱 알고리즘의 성능 평가)

  • Shim, Kwang-Seob
    • Journal of KIISE:Software and Applications
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    • v.36 no.7
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    • pp.571-579
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    • 2009
  • A left-comer and look-ahead chart parsing algorithm suppresses the generation of meaningless intermediate structures, and thus, gains parsing speed-ups. However, the algorithm requires additional costs to maintain left-comer and look-ahead information throughout the parsing process. Albeit the additional costs, previous research shows that significant parsing speed-ups have been achieved for large-sized context-free grammars. In this paper, we perform similar experiments with a small-sized grammar. We still get parsing speed-ups, but relatively low. We also find that left-comer information has rather negative effects on parsing speed-ups.

THE EFFECT OF A SYNTHETIC ANALOGUE OF PYROPHOSPHATE ON CALCIUM, MAGNESIUM AND PHOSPHORUS HOMEOSTASIS IN SHEEP

  • Matsui, T.;Kawabata, T.;Harumoto, T.;Yano, H.
    • Asian-Australasian Journal of Animal Sciences
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    • v.5 no.2
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    • pp.303-308
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    • 1992
  • Three female sheep were daily administered a pyrophosphate analogue, disodium 1-hydroxyethylidene-1, 1-bisphosphonate (HEBP) at the level of 4 mg/kg body weight. HEBP largely suppressed bone resorption, which was indicated by the reduction in plasma free hydroxyproline concentration and in calcium mobilization rate during the intravenous infusion of disodium ethylenediaminetetraacetate (EDTA). Contrary to the suppression of bone resorption, plasma total-calcium, magnesium and phosphorus concentrations were not changed by HEBP administration. These results suggest that bone mineral crystals play a meaningless role on calcium, magnesium and phosphorus homeostasis in ruminants if they are fed adequate amounts of these minerals. Plasma magnesium and phosphorus concentrations were not significantly changed after feeding. However, plasma total-calcium was decreased after feeding in both periods and the reduction seemed to be remarkable in the HEBP-treated period. Infusion of EDTA more remarkably reduced plasma ionized calcium concentration in the HEBP-treated that in the untreated period and the recovery of ionized calcium was retarded by HEBP administration. These results suggest that calcium release from bone is necessary for maintenance of plasma calcium when animals rapidly lose calcium.