사이버전 중심의 미래전 고찰

강태원(Taewon Kang),황정섭(Jeongseop Hwang) 한국정보보호학회 2002 情報保護學會誌 Vol.12 No.6

A Study on High Performance Converter Topology for Hydrogen Gas Generation Electrolysis System

Taewon Kang(강태원),Yuran Go(고유란),Yongsug Suh(서용석),Junik Jeong(정준익),Dohawn Rho(노도환) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7

This paper investigates a high performance converter topology for hydrogen gas generation electrolysis system. The proposed converter topology consists of full-bridge inverter, medium frequency transformer, and diode rectifier. Hydrogen gas generation electrolysis process considered in the paper is analyzed and characterized by its equivalent circuit. The electrolysis cell is modeled as effective resistance, capacitance, inductance, and internal emf voltage source. The proposed converter topology provides enhanced efficiency of hydrogen gas generation process under the operating condition of dc output voltage with high frequency ripple on it. The high performance operation of proposed converter is confirmed through the simulation with the electrolysis cell considered in the equivalent circuit model.

퍼지지능모델(F - 지능모델)의 구성에 의한 귀납학습시스템 설계

강태원(Taewon Kang),황종선(Chong-Sun Hwang) 한국정보과학회 1990 한국정보과학회 학술발표논문집 Vol.17 No.2

인간이 직면하는 대부분의 문제는 많은 모호성을 포함하게 되며 이에 따라 초근에는 FUZZY 논리에 대한 많은 연구가 진행되고 있다. 또한 학습은 인공지능 분야에서 가장 복합적이고 궁극적인 분야이다. 기존의 학습시스템은 근본적인 모호성을 취급하지 못하고 단지 주어진 명확한 상황(Game)에 대한 전형으로 연구되어져 왔다. 본 논문에서는 이러한 개념을 통합하여 규칙에 근거한 F-지능모델을 구성함으로서 정보 부족에 의한 모호성뿐만 아니라 근본적인 모호환경 하에서도 학습과 문제해결을 수행하는 귀납학습시스템을 설계하고 그에 필요한 규칙들을 분류한다.

Design of Three-winding Coupled Inductor for Minimum Current Ripple in Battery Chargers

Taewon Kang(강태원),Yongsug Suh(서용석) 전력전자학회 2015 전력전자학술대회 논문집 Vol.2015 No.07

경제성을 갖춘 고점성 디지털 프린터의 개발

강태원(Taewon Kang),최원식(Won Sik Choi),김태우(Tae Woo Kim),이기성(Kee Sung Lee) 한국생산제조학회 2016 한국생산제조학회지 Vol.25 No.4

Digital printing has been used in various industrial areas, including semiconductor manufacturing and textile printing. However, implications on ceramic textile have not been well established so far. Printing high-viscosity materials requires an understanding of their behavior. An inorganic high viscous material with a viscosity range of 20-30 cps is analyzed using a viscometer and through X-ray diffraction. In this study, a digital printer is designed and assembled using a high-viscosity material with software for PC control, resulting in reduced processing at a fast area velocity of 20 m²/hr. The present study demonstrated that the printer is capable of controlling the shape of the drop mass to smear ink smoothly onto the ceramic surface under an economic budget. In addition, to avoid any difficulty in color management, the ceramic printer is equipped with an independent color management system designed to cope with images on a highly viscous material.

생체재료를 설명하는 스트레인 에너지 함수에 대한 이론적 고찰

강태원(Taewon Kang) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.1

In order to understand the biomaterial like the blood vessel of artery, there is a need to quantify the biomechanical behavior of the vessel. However, theoretical framework to describe and quantify the behaviour of blood vessel was not well established so far. For studying the biomechanical behavior of artery, Rubber-liked material which is similar to passive artery is selected since conventional theoretical interpretation is very limited to understand and predict the behavior of biomaterial. Rubber-like material is assumed to be very similar to artery and has properties of isotropy, homogeneity and is undergoing large deformation. Based on this assumption, stress developed on Rubber-like material is described by strain energy function and strain invariants which are required to understand the nonlinear elastic behavior of biomaterial. The descriptor which would be used for understanding the biomechanical behavior of artery is studied in this work.

국제 간편 결제 서비스에 대한 소비자 수용에 관한 연구

강태원(Taewon Kang),장숙림(SHULIN ZHUANG) 전북대학교 산업경제연구소 2016 아태경상저널 Vol.8 No.3

구매자와 판매자를 연결하는 인터넷 기반 플랫폼들이 성공적인 비즈니스 모델로서의 위상을 확보해 나감에 따라 이러한 플랫폼 상에서의 국제 간편 결제시스템에 대한 관심도 증가해 왔다. 따라서 이러한 국제 간편 결제시스템에 대한 소비자들의 행동을 설명하고 예측하는 것은 성공적인 인터넷 기반비즈니스 전략을 수립하는데 주요한 문제라고 할 것이다. 그러나 이러한 중요성에도 불구하고 국제 간편 결제시스템에 대한 소비자들의 행동을 규명한 연구는 현재 미비하다. 본 연구는 기술수용모델과 계획행동이론을 이론적 준거 틀로 삼아 국제 간편 결제 시스템 이용자들의 행동의 인과관계를 실증적으로 검증하는데 주목적을 둔다. 이를 위해 국제 간편 결제를 이용하고 있는 중국 소비자들을 대상으로 설문조사를 실시하여 자료를 수집하고 수집된 자료를 구조방정식 모델링을 통해 실증적으로 분석하였다. With the development of information and communication technology and the increasing number of the technology users, many electronic commerce companies have been providing international easy payment service for customers. Nonetheless, not all customers adopt the service. Drawing on the technology acceptance model and the theory of planned behavior, the present study developed a theoretical model that may explain customers’ adoption of international easy payment service. The theoretical model was empirically tested with data collected from a survey on Chinese people’s usage of electronic commercial sites. The data were analyzed with a structural equation modeling technique. The results of this analysis are as follows. First, Trust, perceived behavior control, perceived usefulness, and perceived ease of use have positive effects on users’ willingness to use. Second, perceived ease of use has a positive effect on perceived usefulness. Third, trust and perceived behavior control have positive effects on attitude toward usage. Fourth, trust has a positive effect on users’ attitude toward usage and willingness to use. Fifth, perceived behavior control have positive effects on users’ attitude toward usage and willingness to use. The results suggest that the higher international easy payment service’s reliability is, the more likely the users adopt the service. In addition, the more knowledgable customers are, the more successfully the customers complete the transactions on electronic commercial sites.

전기자동차용 리튬이온 배터리 급속충전장치 설계와 제어

강태원(Taewon Kang),서용석(Yongsug Suh),박현철(Hyeoncheol Park),강병익(Byungik Kang),김성훈(Simon Kim) 전력전자학회 2013 전력전자학회 논문지 Vol.18 No.1

This paper presents a simple and cost-effective stand-alone rapid battery charging system of 30kW for electric vehicles. The proposed system mainly consists of active front-end rectifier of neutral point clamped 3-level type and non-isolated bi-directional dc-dc converter of multi-phase interleaved half-bridge topology. The charging system is designed to operate for both lithium-polymer and lithium-ion batteries. The complete charging sequence is made up of three sub-interval operating modes; pre-charge mode, constant-current mode, and constant-voltage mode. The pre-charge mode employs the stair-case shaped current profile to accomplish shorter charging time while maintaining the reliable operation of the battery. The proposed system is specified to reach the full-charge state within less than 16min for the battery capacity of 8kWh by supplying the charging current of 78A. Owing to the simple and compact power conversion scheme, the proposed solution has superior module-friendly mechanical structure which is absolutely required to realize flexible power expansion capability in a very high-current rapid charging system.

생체 유사재료를 설명하는 물질 상수 추정

강태원(Taewon Kang) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.1

It is important to have a well developed strain energy function in order to understand the mechanical behavior of biomaterial like the blood vessel of artery. However, since it is not possible to have a complete form of strain energy function of artery, theoretical framework describing the behaviour of Rubber-like material which is similar to blood vessel is applied to infer useful forms of strain energy function of biomaterial. Based on Chuong-Fung model and Mooney-Rivlin model, material parameters are estimated based on experimental data. From the results, it can be inferred that the estimated parameters can be used to explain the difference of mechanical characteristics between normal vessel and vessel with stent.

신경망 학습을 위한 콤팩트 유전 알고리즘

강태원(Taewon Kang) 한국정보기술학회 2020 한국정보기술학회논문지 Vol.18 No.2

This study is about the CGANN algorithm, which uses compact genetic algorithms to optimize multi-layer neural network weights. CGA is a variation of the genetic algorithm that does not construct a population sets and genetic operations like crossover and mutation but uses a prototype vector to generate chromosomes. In CGANN, the prototype vector is a vector storing the probability that the genes that make up a chromosome i.e. weights constituting the neural network take a specific value, and the CGA learns this to optimize the neural network. Using Kaggles Fruits360 image data set, CGANN was applied to neural networks for image classification problems, and it was found that, according to learning coefficient, it could be trained with more accuracy than GANN combined with common genetic algorithms.