• Title/Summary/Keyword: Ahn Jae-Hong

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상행대동맥의 외과적치료: 조기성적

  • Baek, Wan-Ki;Kim, Hyeok;Seo, Pil-Won;Yoo, Jae-Hyun;Lee, Won-Yong;Lee, Young-Tak;Park, Pyo-Won;Ahn, Hyeok;Park, Young-Kwan;Hong, Seung-Rok;Lee, Young-Gyun
    • Proceedings of the KTCVS Conference
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    • 1993.06a
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    • pp.25-25
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    • 1993
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Web Services of Bioinformatics (바이오인포매틱스 Web Services)

  • Cho, Hee-Hyung;Ahn, Bu-Young;Ahn, Sung-Soo;Park, Jae-Hong;Park, Hyung-Seong
    • Proceedings of the Korea Information Processing Society Conference
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    • 2005.11a
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    • pp.635-638
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    • 2005
  • 근래 들어 생명과학 및 생명정보에 대한 관심이 높아지면서, 활발한 연구 활동의 결과물로 많은 정보를 얻을 수 있게 되었다. 방대한 생명정보를 분석할 수 있는 많은 알고리즘이 개발되었으며, 웹 기술이 발달함에 따라 생명정보의 활용도가 높아져서 다양한 방법으로 정보 서비스가 가능하게 되었다. Web Services는 XML, SOAP, WSDL, UDDI를 사용하는 분산 컴포넌트 기반의 컴퓨팅 기술로 서비스를 제공하는 Service Provider와 서비스 제공자의 정보를 저장하는 Service Registry 및 서비스를 사용하는 Service Requestor로 구성된다. 본 논문에서는 바이오인포매틱스 분야에서 Web Services를 구성하는 모든 요소들을 개발한다. 특히 One-Stop Web Services는 GUI 환경의 인터페이스로 사용자에게는 용이한 실행 환경을 제공하고 있으며, Web Services 개발자에게는 사용자 인터페이스 개발 부담을 줄일 수 있다.

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FLUX DECLINE DURING THE ULTRA-FILTRATION OF DILUTE SI COLLOIDAL SOLUTION WITH HOLLOW FIBER MEMBRANE

  • Park, Ho-Sang;Nam, Suk-Tae;Jeon, Jae-Hong;Lee, Seok-Ki
    • Proceedings of the Membrane Society of Korea Conference
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    • 1999.07a
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    • pp.95-96
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    • 1999
  • The ultrafiltration behavior of dilute colloidal solution containing Si particles has been investigated. The experiments in cross flow mode have been performed at different operating condition by using the membrane with 20 kDa cut-off. The flux decline was due to the development of membrane fouling which was a dynamic process of two distinctive stages. For the high trans-membrane pressure, the pore blocking resistance was dominant at the initial period of filtraion and was followed by the cake resistance. And for the low cross flow velocity, the membrane fouling was governed by the cake filtration model at the initial stage of filtration process. Flux jump was observed temporally during the membrane filtration of mixed feed solution.

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A STUDY ON BIM-BASED 5D SIMULATION IN WEB ENVIRONMENT

  • Jae-Bok Lim;Jae-Hong Ahn;Ju-Hyung Kim;Jae-Jun Kim
    • International conference on construction engineering and project management
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    • 2013.01a
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    • pp.169-172
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    • 2013
  • Building Information Modeling (BIM) is an effective decision-making platform that helps to save project cost and enhance quality of construction. By generating and linking a wide variety of objects data, BIM can be effectively utilized, and it should be ensured that object properties maintain consistency throughout the project period of design, estimates, construction, maintenance and repair. This study examined how to utilize BIM data in a construction project, by linking cost and schedule data in web environment, to better utilize the information and maintain consistency of the BIM information. To do so, the model integrated WBS data and CBS data, linked them with BIM model to realize 5D simulation in web environment. As a result, cost and schedule data could be simultaneously acquired, and object properties-cost, schedule, location-as well. These are expected to contribute to developing a BIM-based automatic data-processing system in web environment.

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A Study On the Single Phase SRM Driver of High Power Factor Connection (단상 SRM의 고역률 구동회로에 관한 연구)

  • Hong, Jeng-Pyo;Lee, Sang-Hun;Park, Sung-Jun;Ahn, Jin-Woo;Kwon, Soon-Jae;Hong, Soon-Ill;Kim, Cheul-U
    • Proceedings of the KIEE Conference
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    • 2001.04a
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    • pp.345-348
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    • 2001
  • In this paper, the development of input power factor and harmonic distortion of line current were showed in the proposed single-stage SRM inverter. It is verified from the experiments that the proposed encoder and logic controller can be a powerful candidate for the practical low cost SRM drive.

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Overvoltage Protection Controller Design of Distributed Generation Connected to Power Grid Considering Islanding Condition

  • Cha, Jae-Hun;Park, Kyung-Won;Ahn, Hong-Seon;Kwon, Kyoung-Min;Oh, Jin-Hong;MAHIRANE, Philemon;Kim, Jae-Eon
    • Journal of Electrical Engineering and Technology
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    • v.13 no.2
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    • pp.599-607
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    • 2018
  • Distributed generation (DG) is being highlighted as an alternative for future power supplies, and the number of DG systems connected to conventional power systems is steadily increasing. DG generators are designed using power electronics and can give rise to various power quality problems, such as overvoltage or overcurrent. Particularly, unintentional islanding operation can occur in a conventional power system when the power grid is separated from the DG systems. Overvoltage may occur in this situation, depending on the power generation and power consumption. However, overvoltage phenomena might not happen even when islanding occurs. Therefore, it is necessary to analyze the fault characteristics during islanding. In this study, a fault analysis of islanding operation was carried out using PSCAD/EMTDC, and a countermeasure for the overvoltage problem is proposed.