• Title, Summary, Keyword: Platform characteristics

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An Analysis of the Factors Affecting User Satisfaction in Computational Science and Engineering Platforms: A Case Study of EDISON (계산과학공학플랫폼 품질 특성이 사용자 만족도에 영향을 미치는 요인에 관한 연구)

  • On, Noori;Kim, Nam-Gyu;Ru, Kimyoung;Jang, Hanbichnale;Lee, Jongsuk Ruth
    • Journal of Internet Computing and Services
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    • v.20 no.6
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    • pp.85-93
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    • 2019
  • Computational Science and Engineering is a convergence study that understands and solves complex problems such as science, engineering, and social phenomena through modeling using computing resources. Computational science and engineering combines algorithms, computational and informatics, and infrastructure. The importance of computational science is increasing with the improvement of computer performance and the development of large data processing technology. In Korea, Korea Institute of Science and Technology Information (KISTI) has been developing national computational science engineering software and utilization technology by combining basic science and computing technology through EDISON project. The EDISON project builds an open EDISON platform and integrates and services information systems in seven areas of computational science and engineering (computational thermal fluids, nanophysics, computational chemistry, structural dynamics, computational design, and computational medicine). Using this, we have established a web-based curriculum to lay the groundwork for fostering scientific talent and commercializing computational science and engineering software. The purpose of this study is to derive the quality characteristic factors of computational science platform and to empirically examine the effect on user satisfaction. This paper examines how the quality characteristics of information systems, the computational science engineering platform, affect the user satisfaction by modifying the research questions according to the propensity of the computational science platform by referring to the success factors of DeLone and McLean's information system. Based on the results of this study, we will suggest strategic implications for platform improvement by searching the priority of quality characteristics of computational science platform.

A study on temperature characteristics of the driving motor of platform screen door. (승강장 스크린도어용 구동모터의 온도특성에 관한 연구)

  • Ohn Jung-Ghun;Kwon Ki Jin;Choi Yung Ha;Shim Jae-Bock
    • Proceedings of the KSR Conference
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    • pp.1278-1284
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    • 2004
  • Platform screen dorr (PSD) is equipment composed of screens and doors on the platform of subways or light trains, separating the platform from the railroad. The equipment is opened and closed in connection to the doors of carriages. In order to operate the system safely, it is important to understand the characteristics of key parts. There are many parts and environmental factors such as voltage, current and temperature change but the present study measured the change rate of torque and energy changes according to the temperature of the driving motor and analyzed the characteristics of the changes and examined the features of a motor required for stable PDS and the conformability of control programs.

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The simulation on the characteristics of ventilation in the subway platform (지하철 승가장내의 환기 특성에 관한 해석적 연구)

  • Park, B.S.;Kim, H.Y.;Kim, Y.G.
    • Proceedings of the KSME Conference
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    • pp.139-145
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    • 2001
  • The purpose of present study is to find design parameters and operating conditions of the HVAC system in a subway platform. The simulation was carried out for the flow, heat and mass transfer for heating, ventilating and air-conditioning(HVAC) environments in the subway platform. The steady-state. incompressible flow assumption and standard $k-{\varepsilon}$ turbulence model are adopted. The location of HVAC air inlet above platform and the volume flow rate of curtain air released from inlet B are chosen as main parameters in this study. The results of present study are following: In the case of existence of train, the heat and contaminant released under the train have no effect on the average temperature and mass fraction of contaminant in the platform, but heat released on the train has influence on the average temperature in the platform. Train acts as an obstacle to exhaust the contaminant in the platform, but has good effect on the average temperature in the platform.

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An Experimental Study on the Aerodynamic Effects Generated by a Train Passing Rear by Platform (철도차량의 승강장 통과시 발생하는 공기역학적 영향에 대한 실험적 연구)

  • Kim, Dong-Hyeon;Kwon, Hyeok-Bin;Kim, Do-Hoon;Kim, Moon-Hun;Song, Moon-Shuk
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.28 no.6
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    • pp.734-739
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    • 2004
  • The aerodynamic effect on platform during the train passage, the results of field test on the high-speed railway platform are discussed and the whole test results and conclusions are synthesized. The field test for the high-speed railway have been conducted on the Osong temporary platform in the newly constructed Seoul-Busan high-speed line and total 12 measurements have been conducted for G7 train and KTX train. The results shows that the high-speed trains have similar aerodynamic characteristics and have far better characteristics referring to the conventional trains such as Saemaul and Mugungwha trains. To discuss the actual aerodynamic effects on the platform at its own operational speed, Beaufort wind scale have been introduced and the criteria for the safety on railway platform has also been discussed.

High Performance TFTs Fabricated Inside a Location-Controlled Grain by Czochralski (grain-filter) Process

  • Rana, Vikas;Ishihara, Ryoichi;Metselaar, J.W.;Beenakker, C.I.M.;Hiroshima, Yasushi;Abe, Daisuke;Higashi, Seiichiro;Inoue, Satoshi;Shimoda, Tatsuya
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.237-240
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    • 2003
  • This paper reports the characteristics of TFTs, formed inside a location-controlled grain: "single-crystalline" Si TFTs (c-Si TFTs). Position of the grains were controlled with a great precision by "${\mu}-Czochralski$ (grain-filter) process". Effects of process parameters, such as, deposition method of gate $SiO_2$, crystallization energy density and position of the channel with respect to the grain filters on TFT characteristics is investigated. It is concluded that the characteristics of TFTs drastically improved by avoiding the grain filter from the channel region. With TFTs having the current-flow direction parallel to radial direction from the grain-filter, electron mobility and subthreshold swing of 600 $cm^2/Vs$ and 0.21 V/dec. respectively are obtained.

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The Impact of New Media Properties to Self-Efficacy and Marketplatform Attractiveness (뉴미디어 환경 속성이 자기효능감 및 모바일 마켓플랫폼 매력도에 미치는 영향)

  • Lee, Jeong Hoon;Kim, Soo Kyung
    • Journal of Information Technology Applications and Management
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    • v.20 no.4
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    • pp.315-338
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    • 2013
  • As a result of New media that affects the marketing system, it is appeared a new marketing system called Market Platform in terms of market governance of trading. Market Platform is a new marketing system for ideal market system through the community structure from a hierarchy structure. It is determined that Market Platform as the role of adjustment of each side of market, buyer and seller, developed an existing marketing system. In this study, to target the Market Platform has recently emerged as the center of the market management in the new media environment. This study investigates what characteristics and impact of infrastructure of Market Platform will affect the cognitive impact on both buyers and sellers to clarify the impact on the self efficacy of the shopping process. Through this investigation, modeling for the impact that new media environment will attract Market Platform will be developed from the investigation of attractiveness of mobile market platform environment. Changes in the technical media environment gave the characteristics of the customer in the market platform, so consumers could involve not only consumed, but also manufactured. Thus, it is possible to increase the attractiveness if market must be able to not only for the convenience of shopping, but also make people to enjoy the experience of value co-creation. In other words, the new media, as a result of affecting the marketing system, mobile market platform is organized around the market of communication base. Network centrality, visible openness, ubiquitous multiplexity, 3 properties of new media increase the market self-efficacy of their customers. Therefore, the structure of market platform that enhance self-efficacy has higher attractiveness.

A Study on the Dielectric Design of the High-Voltage Platform for Developing the 28 GHz ECRIS at the KBSI

  • Hong, Jonggi;Park, Jin Yong;Kim, Sung Jun;Ok, Jung-Woo;Lee, Byoung-Seob;Jeon, Sangsu;Kang, Hyoungku
    • Journal of the Korean Physical Society
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    • v.73 no.8
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    • pp.1170-1173
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    • 2018
  • Currently, the 28 GHz ECRIS (electron cyclotron resonance ion source) was developed to produce a high-current heavy-ion beam at the KBSI (Korea Basic Science Institute). The high-voltage platform of the 28 GHz ECRIS is essential to deliver an ion beam to the next acceleration stage. The high-voltage platform was designed considering dielectric characteristics in order to ensure electrical safety. In this paper, a study on the dielectric characteristics of GFRP (glass-fiber-reinforced plastic) is performed to determine the thickness of the GFRP cylindrical shell located between the plasma chamber and the warm bore of the superconducting magnet cryostat. The dielectric experiments on a GFRP cylindrical shell were conducted under a DC voltage. Sphere-to-plane electrode systems were used to examine the dielectric characteristics. Also, the relationship between the dielectric characteristics of the GFRP cylindrical shell and the distribution of the electric field intensity was calculated and analyzed by using FEM (Finite Elements Method) simulations.

Effective Silicon Oxide Formation on Silica-on-Silicon Platforms for Optical Hybrid Integration

  • Kim, Tae-Hong;Sung, Hee-Kyung;Choi, Ji-Won;Yoon, Ki-Hyun
    • ETRI Journal
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    • v.25 no.2
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    • pp.73-80
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    • 2003
  • This paper describes an effective method for forming silicon oxide on silica-on-silicon platforms, which results in excellent characteristics for hybrid integration. Among the many processes involved in fabricating silica-on-silicon platforms with planar lightwave circuits (PLCs), the process for forming silicon oxide on an etched silicon substrate is very important for obtaining transparent silica film because it determines the compatibility at the interface between the silicon and the silica film. To investigate the effects of the formation process of the silicon oxide on the characteristics of the silica PLC platform, we compared two silicon oxide formation processes: thermal oxidation and plasma-enhanced chemical vapor deposition (PECVD). Thermal oxidation in fabricating silica platforms generates defects and a cristobalite crystal phase, which results in deterioration of the optical waveguide characteristics. On the other hand, a silica platform with the silicon oxide layer deposited by PECVD has a transparent planar optical waveguide because the crystal growth of the silica has been suppressed. We confirm that the PECVD method is an effective process for silicon oxide formation for a silica platform with excellent characteristics.

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Laser welding technology platform for automotive industry (자동차용 강판의 레이저 용접 플랫폼기술)

  • Kim, Cheol-Hee;Kang, Min-Jung;Ahn, Young-Nam
    • Laser Solutions
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    • v.14 no.1
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    • pp.6-13
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    • 2011
  • Manufacturing technology platform for automotive and mobile industries has been constructed since 2009, for the platform technology project funded by ministry of knowledge and economics. Technology platform in laser welding has also been developed for automotive steel sheets with a strength up to 1GPa. Laser welding technology platform will provide welding characteristics for various laser sources, steel plates and welding conditions. This article shortly explains outline of laser welding technology platform and partially introduces the developed laser welding data base.

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Concept of Spatial Information Social Platform and Role of Government as a Platformer (공간정보 소셜플랫폼의 개념과 플랫포머로서 정부의 역할)

  • Choi, Won-Wook;Hong, Sang-Ki;Shin, Dong-Bin;Ahn, Jong-Wook
    • Spatial Information Research
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    • v.20 no.4
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    • pp.37-45
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    • 2012
  • Moving forward on smart society, change of the way to solve the spatial issue used in information society is required. In order to be competitive and sustainable spatial information service, existing "spatial information open platform" strategy needs to be transformed into "spatial information social platform". The requirement for the spatial information open platform to be socialized and evolved into the spatial information social platform is investigated with respect to the characteristics of social platform P. Savalle(2010) suggested. Based on the investigation, the definition of spatial information social platform is formulated. Several roles of the government as a platformer to create and manage the spatial information social platform are suggested.