• 대한기계학회논문집B
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• 제28권6호
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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.

• 복식문화연구
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• 제31권3호
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• pp.310-329
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• 2023

To compete with the growth of fashion shopping platforms in the online fashion market, general shopping platforms have begun to expand their product categories to include fashion items. This research examines the characteristics that influence consumers' trust in each of these platforms and their intention to reuse them. Applying the concept of platforms, this study also distinguishes between general shopping platforms and fashion shopping platforms and compares their characteristics. This study surveyed 788 consumers in their 20s and 30s with experience in using general shopping platforms or fashion shopping platforms (389 and 399 respondents, respectively). SPSS was used to conduct frequency analysis, factor analysis, and cross-tabulations, and AMOS was used to conduct confirmatory factor analyses and structural equation analyses. The results were as follows: platform reputation, shopping convenience, and interactivity all influenced consumer trust. For fashion shopping platforms, the product quality factor significantly improved consumer trust. However, for general shopping platforms, the product quality factor only influenced reuse intentions to reuse and did not contribute to improving trust. Platform reputation and information offering have influenced reuse intentions for both shopping platforms. Regardless of the type of shopping platform, platform reputation has influenced reuse intentions and consumer trust, and platform esthetics didn't have affect consumer trust and consumers' reuse intentions. Consumer trust influenced the intention to reuse on both platforms.

• 한국컴퓨터정보학회논문지
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• 제29권7호
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• pp.129-137
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• 2024

사회적 기업은 경제적 목적과 사회적 목적을 동시에 달성해야 하는 이중적 구조로 인해 높은 비용구조와 비효율적 운영, 대부분 인적 자원과 물적 자원이 부족한 상태에 놓여 있다. 이러한 문제를 해결하기 위하여 사회적 기업 간의 자원 및 정보 공유 등의 협업은 중요한 관리적 문제로 주목받고 있다. 이러한 사회적 기업 간의 공동 프로젝트 추진, 자원 부족(자금, 기술, 인력, 장비 등)의 문제 해결, 기업간 의사소통 채널 구축 및 유기적 정보공유 등을 원활하게 지원하는 수단으로서 온라인 플랫폼(online platform)의 구축 및 운영이 중요시되고 있다. 이러한 배경에 따라 본 연구는 사회적 기업의 협업을 지원하는 온라인 플랫폼의 요구특성이 기업의 특성(일반 특성, 협업 특성)에 따라 어떻게 달라지는가를 실증적으로 규명한 결과, 규모에 따라 통계적으로 유의한 수준에서 차이가 존재하고 있음을 확인할 수 있었다. 이러한 결과는 향후 국내 사회적 기업의 협업 지원 온라인 플랫폼의 관리방안 도출, 플랫폼을 이용한 협업 증대 방안 모색 등에 있어서 유용하게 활용될 수 있을 것으로 기대된다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집D
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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.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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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.

• Journal of Information Technology Applications and Management
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• 제20권4호
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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.

• 한국콘텐츠학회논문지
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• 제22권6호
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• pp.342-353
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• 2022

본 연구는 중국 현지의 학습자들을 대상으로 실시간 온라인 교육 플랫폼의 교수자 특성, 콘텐츠 특성과 플랫폼특성이 학습만족도 및 지속사용의도에 미치는 영향을 분석함으로써 실시간 온라인 교육 플랫폼 시장의 활성화에 도움이 되고자 한다. 설문조사를 통해 총 670부 설문지를 수집하여 실증분석을 실시하였다. 분석 결과, 첫째, 교수자의 특성인 매력성을 제외하고 전문성과 성실성은 학습만족도에 모두 유의미한 정의 영향관계가 있었다. 둘째, 콘텐츠 특성의 유용성, 풍부성과 적절성은 학습만족도에 모두 유의미한 정의 영향 관계가 있었다. 셋째, 플랫폼 특성인 상호작용성을 제외하고, 기술성과 편리성은 학습만족도에 모두 유의미한 정의 영향 관계를 확인하였다. 넷째, 학습만족도는 지속사용의도에 유의한 긍정적인 영향을 미쳤다. 따라서 실시간 온라인 교육 플랫폼 시장의 활성화를 위해 교수자 특성, 콘텐츠 특성과 플랫폼특성에 대하여 실제로 느끼는 효용의 가치를 높였다는 점에서 큰 의미가 있다. 본 연구는 실시간 온라인 교육 플랫폼 실무적 시사점과 향후 연구방향을 제시하였다.

• 한국정보시스템학회지:정보시스템연구
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• 제31권2호
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• pp.111-136
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• 2022

Purpose The purpose of this study is to examine the effect that insecurity and autonomy of platform work have an influence on work-life balance and psychological well-being in an era of platform economy based on two characteristics of online platform work and self-determination theory. Design/methodology/approach This study suggested the structural equation model integrating two antecedents, insecurity and autonomy, work-life balance, and psychological well-being and proposed five hypotheses driven from the research model. A total of 334 valid samples were collected from platform workers by employing questionnaire including 24 question items of four constructs. Findings Three hypotheses were supported and one hypothesis was not supported at the significance level of 0.05. Insecurity of platform work has a negative influence on work-life balance at the significance level of 0.01, whereas insecurity of platform work has no a significant influence on psychological well-being. Autonomy of platform work has a positive influence on both work-life balance and psychological well-being at the significance level of 0.01. Work-life balance has a positive impact on psychological well-being at the significance level of 0.001. Insecurity have an influence on psychological well-being indirectly through mediation of work-life balance. Implications for academicians and practitioners were suggested.

• 한국IT서비스학회지
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• 제21권5호
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• pp.15-28
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• 2022

Recently, government agencies are actively adopting the platform model as a means of public policy. However, existing studies on the public platform are minimal and have focused on user experiences or the possibility of public usage of the platform model. Now the research concerning building governance structure and utilizing network effects of the platform after adopting the platform model in the public sector is keenly required. This study intended to ignite academic dialogue on the governance of public platforms in the context of digital transformation. This study focused on a case of the 'Special delivery,' a public delivery app established by Gyeonggi-do. In order to analyze the characteristics of the public platform and its governance structure, data were collected from press releases, policy reports, and news articles. Data was analyzed using the frame of Hagui's platform design factors and Ansell & Gash's collaborative governance model. The results of the public platform analyses showed 1) incompleteness in the value trade-off accounting, which was designed for platform business based on general cost-benefit analysis, and 2) a closed governance structure that limits direct participation of diverse user groups(i.e., service provider, customer) in order to enhance providers' utility by preventing customers' excessive online activities. The results of this study provided theoretical and policy implications regarding designing the strategy for accounting for value trade-offs and functioning governance structure for public platforms.

• 한국음향학회지
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• 제40권6호
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• pp.615-625
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• 2021

본 연구에서는 지하철 승강장에 적합한 실내음향 설계기준 제시에 앞서, 현재의 지하철 승강장의 위치별 실내음향 특성을 파악하기 위해 2개의 지하철 역사 승강장에서 현장 측정을 실시하였다. 승강장의 길이방향에 따른 분석 결과, 음원에서 수음점이 멀어질수록 음압레벨은 감소(최대 차이: 약 14 dB), 잔향시간은 증가하는 경향(최대차이: 0.8 s ~ 1.5 s)이었고, C₅₀과 D₅₀은 감소하는 경향(최대 차이: 5.9 dB ~ 9.1 dB와 31.8 % ~ 37.6 %)인 것으로 나타났다. 공간감의 지표인 Interaural Cross-correlation Coefficient(IACC)는 음원과의 거리에 따른 명확한 경향성은 보이지 않았지만, 전체적으로 0.3이하의 낮은 값을 보였다. 이러한 결과를 살펴보았을 때 지하철 승강장은 일반적으로 강한 반사재로 마감 되었음에도 수음위치에 따라 직접음과 반사음의 다양한 조합이 형성되어 비균일한 음장특성을 갖는 것으로 판단된다. 이는 길이 대비 높이가 낮고 긴 평면형태를 갖는 지하철 승강장에서는 음원과 수음점의 거리에 따라 근접음장과 원음장의 실내음향특성이 뚜렷이 발현되고 있음을 나타난다. 따라서, 승강장의 모든 위치에서 명료한 음정보를 갖춘 실내음향설계를 위해서 승강장에서의 스피커와 수음점 위치별 특성에 기인한 세부 건축 및 전기음향설계가 필요하다.