• 한국자동차공학회논문집
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• 제21권6호
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• pp.31-39
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• 2013

A virtual chassis platform for Fuel Cell Hybrid Electric Vehicles(FCHEV) has been developed, and a virtual platform similar to the actual system has been composed. In addition, major components such as a motor, fuel cell and battery for the virtual platform have been constructed by using a mathematical formulation. The FCHEV virtual platform using a detailed model based on the mathematical formula is capable of simulating various conditions according to changes of the control logic and component modules to evaluate performance, considering the vehicle dynamic characteristics. Usability of the mathematical model has been verified by comparative simulations according to the motor current control variation. In addition, reliability of the developed virtual chassis platform has been verified by simulating its fuel consumption with the UDDS(Urban Dynamometer Driving Schedule) FTP-72 velocity profile.

• 한국컴퓨터정보학회논문지
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• 제24권8호
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• pp.51-58
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• 2019

In this paper, we propose to characteristics of mobile phone dance live broadcast platform and the second-generation technology acceptance model TAM2, this paper established the user acceptance model of mobile phone dance live broadcast platform, aiming to study the influencing factors of users' acceptance on mobile phone dance live broadcast platform. Based on the empirical analysis of user survey, the model is validated, and the relationship between variables in the model is clarified. It is also confirmed that human-computer interaction, scene interaction, relationship interaction and other factors will affect the user's acceptance on mobile phone dance live broadcast platform. At the same time, based on the relationship among variables obtained in the research, this paper tries to analyze how the variables affect each other based on the actual practice of mobile phone dance live broadcast platform. In addition, the video design strategy and marketing strategy for further development of mobile phone dance live broadcast platform are given to help the platform and dance creators to carry out better promotion on the mobile side. In the end, this paper summarizes the shortcomings of this study and points out further research directions in the future, providing a reference for researchers in the field of mobile phone dance live broadcast platform acceptance.

• Structural Monitoring and Maintenance
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• 제7권4호
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• pp.345-365
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• 2020

At present, many machine leaning and data mining methods are used for analyzing and predicting structural response characteristics. However, the platform that combines big data analysis methods with online and offline analysis modules has not been used in actual projects. This work is dedicated to developing a multifunctional Hadoop-Spark big data platform for bridges to monitor and evaluate the serviceability based on structural health monitoring system. It realizes rapid processing, analysis and storage of collected health monitoring data. The platform contains offline computing and online analysis modules, using Hadoop-Spark environment. Hadoop provides the overall framework and storage subsystem for big data platform, while Spark is used for online computing. Finally, the big data Hadoop-Spark platform computational performance is verified through several actual analysis tasks. Experiments show the Hadoop-Spark big data platform has good fault tolerance, scalability and online analysis performance. It can meet the daily analysis requirements of 5s/time for one bridge and 40s/time for 100 bridges.

• Steel and Composite Structures
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• 제42권2호
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• pp.209-219
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• 2022

Offshore platforms in seismically active areas must be designed to survive in the face of intense earthquakes without a global structural collapse. This paper scrutinizes the seismic performance of a newly designed and established jacket type offshore platform situated in the entrance of the Gulf of Suez region based on the API-RP2A normalized response spectra during seismic events. A nonlinear finite element model of a typical jacket type offshore platform is constructed taking into consideration the effect of structure-soil-interaction. Soil properties at the site were manipulated to generate the pile lateral soil properties in the form of load deflection curves, based on API-RP2A recommendations. Dynamic characteristics of the offshore platform, the response function, output power spectral density and transfer functions for different elements of the platform are discussed. The joints deflection and acceleration responses demands are presented. It is generally concluded that consideration of the interaction between structure, piles and soil leads to higher deflections and less stresses in platform elements due to soil elasticity, nonlinearity, and damping and leads to a more realistic platform design. The earthquake-based analysis for offshore platform structure is essential for the safe design and operation of offshore platforms.

• 한국해양공학회지
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• 제36권6호
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• pp.390-402
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• 2022

Offshore wind energy has become a major energy source, and various studies are underway to increase the economic feasibility of floating offshore wind turbines (FOWT). In this study, the characteristics of wave-induced motion of a combined wind-wave energy platform were analyzed to reduce the variability of energy extraction. A user subroutine was developed, and numerical analysis was performed in connection with the ANSYS-AQWA hydrodynamic program in the time domain. A platform combining the TLP-type FOWT and the Wavestar-type wave energy converter (WEC) was proposed. Each motion response of the platform on the second-order wave load, the effect of WEC attachment and Power take-off (PTO) force were analyzed. The mooring line tension according to the installation location was also analyzed. The vertical motion of a single FOWT was increased approximately three times due to the second-order sum-frequency wave load. The PTO force of the WEC played as a vertical motion damper for the combined platform. The tension of the mooring lines in front of the incident wave direction was dominantly affected by the pitch of the platform, and the mooring lines located at the side of the platform were mainly affected by the heave of the platform.

• 트랜스-
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• 제5권
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• pp.29-48
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• 2018

본 연구는 미디어 플랫폼을 기반으로 대중화를 시도하고 있는 국내 무용계의 현상을 살펴보고 이를 문화 참여자들의 상호작용을 기반으로 고찰한다. 이는 무용의 대중화는 궁극적으로 무엇을 의미하는가? 미디어를 매개로 한 대중화전략은 어떤 특징을 띄는가? 이러한 시도들은 모두 같은 속성을 지닌 대중화 전략으로 이해될 수 있는가? 라는 의문에서 비롯된 것이다. 이를 위해 무용의 대중화 전략의 주요 매개로 사용되고 있는 방송매체와 최근 주목받는 온라인 커뮤니티 플랫폼의 특성을 살펴보고, 각 매체를 중심으로 관계 맺는 문화 참여자들의 의사소통 과정에 주목한다. 이를 통해 방송매체를 매개로 한 활동은 사업가(자본)에 의해 통제되고 조종됨으로써 창작자와 수용자(시청자)의 직접적인 커뮤니케이션이 불가능해지고, 사업가가 계획한 문화상품을 생산하는 데 그침으로써 매스컬처(Mass Culture)의 성격으로 분류됨을 밝힌다. 반면 사업가의 직접적인 개입 없이 창작자와 수용자의 직접적인 의사소통 및 상호작용이 가능하며, 창작의 권리가 보장되는 성격을 지닌 온라인 커뮤니티 플랫폼은 포퓰러컬처(Popular Culture)로 분류됨으로써, 무용의 대중화에 관한 담론 확장 및 방법에 적절한 미디어 플랫폼으로 기능함을 제안한다.

• 품질경영학회지
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• 제51권1호
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• pp.97-117
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• 2023

Purpose: The purpose of this study is to examine the factors affecting the intention to continue using the metaverse platform service from the user's point of view. Methods: The study conducted a survey of experienced people using Zepeto, Ifland, Gather Town, Zep, Roblox, Fortnite, and Minecraft, which are virtual world types among metaverse types, and valid 415 data were analyzed by SPSS (ver 22.0) and R (ver 4.1.0) program packages. Results: As a result of empirical analysis, it was found that interactivity and social presence among the characteristics of metaverse affected expectation confirmation, and sensory affordance and functional affordance affected expectation confirmation as affordance factors. In addition, all four characteristics of metaverse, reliability, playfulness, interactivity, and social presence, were found to have the greatest affect on perceived usefulness, and it was analyzed that playfulness, social presence, and reliability were influenced in order. The affordance factor was also found to have a positive effect on physical affordance, sensory affordance, and functional affordance. This study was found that it had a positive effect on the relationship between expectation confirmation and satisfaction and the relationship between perceived usefulness and satisfaction. satisfaction was analyzed to lead to continuance intention. Conclusion: This study is meaningful in that it examines the perspective of users who can be called customers of metaverse platform services. Based on the results of this study, it is expected to have a significant effect on the development of metaverse platform services not only on platform operators that provide metaverse platform services but also on providers who plan events and education using metaverse platform services.

• 한국컴퓨터정보학회논문지
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• 제27권3호
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• pp.183-199
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• 2022

스마트폰 콘텐츠 소비가 늘면서 중국 짧은 동영상(short clip) 시장이 급성장하고 있다. 이에 짧은 동영상 플랫폼인 TikTok이 큰 비즈니스 성공을 거두었다. 그러나 Tiktok플랫폼의 성공요인에 대한 고객중심적 연구는 많지 않다. 이를 위해 본 연구는 실증조사를 통해 Tiktok플랫폼의 소셜네트워크, TikTok플랫폼에 대한 애착, 사용자 참여, 심리적 거리감, 사회적 정체성 및 재사용의도 간의 관계를 검증하는 연구목적을 가진다. 2021년 10월 중국 내 TikTok플랫폼을 사용하는 소비자를 대상으로 설문조사를 실시하였다. 연구 결과 첫째, 소셜네트워크 특성은 사용자 참여와 애착에 유의한 영향을 미쳤다. 둘째, 사용자 참여는 사용자 애착에 유의한 영향을 미쳤다. 셋째, 사용자 애착과 사용자 참여 모두 재사용 의도에 유의한 영향을 미쳤다. 넷째, 심리적 거리감은 소셜네트워크 특성과 사용자 애착 사이의 관계를 부분 조절하는 역할을 하였다. 다섯째, 사회적 정체성은 소셜네트워크 특성과 사용자 참여 사이의 관계를 부분 조절하는 역할을 하였다. 이 연구 결과는 TikTok플랫폼 연구에 관한 이론적이고 실무적인 시사점을 제공할 것으로 기대된다.

• 인터넷정보학회논문지
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• 제20권6호
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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.

• 지능정보연구
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• 제24권2호
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• pp.37-57
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• 2018

최근 스마트폰의 확산에 힘입어 유용한 광고 매체로서 모바일 미디어에 대한 관심이 증가되고 있다. 모바일 미디어는 소비자들에게 언제, 어디서나 원하는 정보를 제공할 수 있을 뿐만 아니라 실시간으로 상호작용이 가능하다는 점에서 기존 광고매체들과는 차별화된 장점을 가진 것으로 평가 받고 있다. 그 동안 모바일 광고 연구들은 모바일 광고에 대한 만족도, 수용도 등을 서베이를 토대로 분석한 연구와 모바일 광고 메시지 수신에 영향을 미치는 요인을 중점적으로 탐구한 연구, 실험연구를 통해서 모바일 광고가 브랜드 회상, 광고태도, 브랜드 태도 등에 미치는 영향을 검증하는 연구들이 많이 진행되었다. 그러나 실증데이터를 통한 연구는 거의 진행되지 않았다. 본 연구에서는 상용서비스 중인 모바일 광고플랫폼을 기반으로 광고효과를 알아보기 위하여 광고주, 광고플랫폼, 퍼블리셔 관점에서 광고특성, 매체특성을 정의하고 각 특성이 광고효과에 미치는 영향을 분석하였다. 각 특성에 대한 회귀분석 결과 모바일 광고의 광고특성인 광고규격과 쾌락적, 실용적으로 구별한 매체 특성이 광고효과에 유의미한 결과를 나타냈으며, 서로간의 상호작용 효과도 확인하였다. 연구결과를 통하여 모바일 광고 업무 시 광고상품에 맞는 광고소재 제작 및 매체계획 등 광고효과에 최적화된 광고전략 수립에 기여할 것으로 보인다.