• Nuclear Engineering and Technology
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• 제56권3호
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• pp.1037-1051
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• 2024

This paper presents the construction results and design of the UNIST Reactor Innovation platform for small modular reactors as a versatile testbed for exploring innovative technologies. The platform uses simulant fluids to simulate the thermal-hydraulic behavior of a reference small modular reactor design, allowing for cost-effective design modifications. Scaling analysis results for single and two-phase natural circulation flows are outlined based on the three-level scaling methodology. The platform's capability to simulate natural circulation behavior was validated through performance calculations using the 1-D system thermal-hydraulic code-based calculation. The strategies for evaluating cutting-edge technologies, such as the integration of a solid oxide electrolysis cell for hydrogen production into a small modular reactor, are presented. To overcome experimental limitations, the hardware-in-the-loop technique is proposed as an alternative, enabling real-time simulation of physical phenomena that cannot be implemented within the experimental facility's hardware. Overall, the proposed versatile innovation platform is expected to provide valuable insights for advancing research in the field of small modular reactors and nuclear-based hydrogen production.

• 기술혁신학회지
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• 제22권2호
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• pp.220-241
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• 2019

본 연구는 플랫폼 생태계 이해관계자간의 공생, 경쟁 관계를 분석하는 이론적 프레임을 구축하고, 플랫폼 제공자와 서비스 제공자간 상호 작용 및 전략을 연구했다. 플랫폼 제공자는 서비스 제공자에 사용자 기반을 제공하며, 서비스 제공자는 플랫폼 제공자에 서비스를 제공하며 공생 관계를 맺는다. 더불어 플랫폼 제공자, 서비스 제공자는 다른 플랫폼 제공자, 서비스 제공자와 경쟁 관계를 형성하며 다양한 상호작용을 만든다. 기존 연구들은 플랫폼 제공자 관점에서 네트워크 효과를 높이는 전략에 집중하고 있다. 본 연구는 조직 생태학의 커뮤니티 이론을 통해 플랫폼 개방, 가격전략에서 플랫폼 제공자와 서비스 제공자간 상호 작용 및 상호 전략을 살펴보았다. 플랫폼 개방, 고가 가격 전락은 서비스 제공자를 늘리고, 이익을 늘리나, 서비스 제공자간 경쟁을 높이고, 서비스 제공자의 이익을 감소시켜 경쟁플랫폼으로의 이동을 촉진해 플랫폼 경쟁력을 약화시킨다. 이에 플랫폼 제공자는 서비스 제공자에 차별적인 플랫폼 자원 제공, 가격 정책을 펼치며 서비스 제공자는 싱글호밍을 통해 공생을 강화하거나, 멀티호밍으로 사용자 기반을 확대하며 플랫폼 생태계에 다양한 상호작용을 만든다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권8호
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• pp.3437-3456
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• 2020

The computational science and engineering field, which combines basic science and computing technology, has emerged as a third scientific methodology, following theories and experiments. This study aimed to identify factors and relationships that affect the continued use of the computational science and engineering (CSE) platform for its successful operation, utilization, and diffusion. To that end, the quality factors of the platform were derived by combining the information system success model and the technology acceptance model. These factors affected user satisfaction and intention to reuse through users' perceived usefulness and perceived ease of use of the platform. An empirical analysis was conducted through a questionnaire survey of 373 users of the EDISON platform, a representative CSE platform in Korea. The results revealed that all quality factors have a positive influence on perceived usefulness and perceived ease of use. Specifically, information quality has a significant influence on perceived ease of use, and system quality has a significant influence on perceived usefulness. Perceived ease of use has a greater impact on user satisfaction than perceived usefulness, and satisfaction affects intention to reuse. The results can contribute to the development of CSE platforms and the development strategy to expand the number of users.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권6호
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• pp.3071-3085
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• 2017

Currently, various technological models and services are emerging because of the development of information and communication technology and the convergence of industries. The ICT car field is expanding because of technological convergence in the automobile industry. However, ICT convergence services are still being developed based solely on technology; characterization of users and their needs is lacking. Therefore, two types of ICT car services that apply human-centered design processes are developed in this study. These processes create services and models while considering the quality and functions of products based on users (instead of technology) when developing products or services. Usability evaluation was performed on the developed services; a human-centered design process was applied to the results to confirm that the derived services resulted in high satisfaction. In the future, these research results will provide useful applications when developing ICT car services and strategies.

• 한국자동차공학회논문집
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• 제23권3호
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• pp.247-253
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• 2015

Platform standardization is widely used in commercial auto industries and other industries to acquire cost reduction as well as high reliability. This paper reviews some application examples and estimates expected effect of Korean army's platform standardization for combat system and combat support system. Also, military platform standardization based on utilization of commercial vehicles has been studied with the standard vehicles used in Korean army. It is estimated that outstanding results may be achieved if a dual platform, the public and military platforms, is utilized. So, when the strategy of the military transportation system is decided, "dual use" concept is necessary and this could maximize the effect of the military strategy reinforcement.

• 무역학회지
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• 제45권1호
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• pp.279-300
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• 2020

The cosmetic medical information mobile platform is evolving into a new channel for searching and obtaining relevant information before using cosmetic medical service. In addition, the medical institutions can facilitate the medical contracts, and take advantage of systemic customer management through the cosmetic medical information mobile platform. Therefore, the paradigm of the cosmetic medical mobile service industry is facing a flow of change through the use diffusion of cosmetic medical information mobile platform. In this study, in order to explore the factors affecting the use diffusion of the cosmetic medical information mobile platform, this study used the research model of the influence of the characteristics of the cosmetic medical information mobile platform on perceived convenience and usefulness, and use diffusion by applying TAM(Technology Acceptance Model). As a result, immediateness, interactivity, and customization in the characteristics of cosmetic medical information mobile platform had positive effects on the perceived convenience. Also, interactivity, customization, and economics had positive impacts on perceived usefulness. In addition, perceived convenience and usefulness had positive effects on the use diffusion. Through this study, the factors influencing the use diffusion of cosmetic medical information mobile platform were actually explored, and the service value of the cosmetic medical information mobile platform were categorized. Future research is expected to contribute to the continuous improvement of quality and expansion of the cosmetic medical service market based on various research.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.375-378
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• 2004

In the telematics industry, the development of an open telematics terminal platform technology will be a great contribution to the telematics industry with an interoperability and adaptability of the telematics services. This paper proposes a terminal platform test process and a prototype of terminal platform testbed systems for an open telematics terminal platform test.

• 한국생산제조학회지
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• 제24권6호
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• pp.660-666
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• 2015

To avoid radiation exposure from repeated x-rays taken during orthopedic surgery, an x-ray permeable teleoperated Stewart platform for orthopedic fracture surgery was developed. This system is composed of a user interface device and a teleoperated operational robot, both of which use a Stewart platform mechanism. The links of the operational robot are made from an x-ray permeable material, polycarbonate, to minimize the interference. The forward and inverse kinematics algorithm applied and the structural reliability were both verified through an analysis using commercial engineering software. To monitor the operating status in real time and stop the device during an emergency, a monitoring software was developed. The performance of the x-ray permeable teleoperated Steward platform was validated experimentally.

• Earthquakes and Structures
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• 제19권5호
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• pp.331-345
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• 2020

The multi-story timber structure with high platform base is one of the important architectural types in the traditional Chinese buildings. To study the dynamic characteristics and seismic responses on this kind of traditional structure, the 3-D finite element models of Xi'an drum tower which included the high platform base, upper timber structure and whole structure was established considering the structural form and material performance parameters of the structure in this study. By the modal analysis, the main frequencies and mode shapes of this kind of traditional building were obtained and investigated. The three kinds of earthquake excitations included El-Centro wave, Taft wave and Lanzhou wave were separately imposed on the upper timber structure model and the overall structure model, and the seismic responses on the tops of columns were analyzed. The results of time history analysis show that the seismic response of the upper timber structure is obviously amplified by high platform base. After considering the effect of high platform base, the mean value on the lateral displacement increments of the top column in the overall structure is more than 20.478% and the increase of dynamic coefficients was all above 0.818 under the above three different earthquake excitations. Obviously, it shows that the existence of high platform base has a negative influence on the seismic responses of upper timber structure. And the high platform base will directly affect the safety of the upper timber structure. Therefore, the influence of high platform base on the dynamic response of its upper timber structure cannot be neglected.

• 한국인터넷방송통신학회논문지
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• 제12권1호
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• pp.57-63
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• 2012

TIP기술은 2차원 그림 또는 한 장의 사진으로부터 기하정보를 추출하여 3차원 입체 효과를 만들어 영상 내부를 내비게이션 할 수 있는 기술로써, 게임, 엔터테인먼트, 교육, 홍보 등 다양한 응용분야에서 활용 가능한 기술이다. 본 논문에서는 android platform상에서의 OpenGL ES Library를 이용하여 확장된 TIP기술 적용 및 구현 방법을 제안한다. 제안 방법은 전경객체의 추출이 어려운 상황을 감안하여 보다 사실적 장면 구성이 용이하도록 사용자의 선택에 의한 소실점을 이용하고, OpenGL ES Library 를 이용하여 3차원 배경 모델을 획득한 후 이미지를 텍스처 매핑하여 3차원 가상공간을 완성한 후 카메라의 시점변환을 통해 이미지 내부를 내비게이션이 가능하도록 한다. 실험영상은 android platform상의 device에서 촬영한 이미지를 사용하여 android 2.1 및 OpenGL ES 1.0기반으로 구축된 제안 기술로 android platform의 스마트 device에서 적은 비용과 시간으로 다양한 응용개발에 적용 가능하도록 구현하였다.