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품질위험 지각 정도에 따른 인터넷 중고차 사이트의 신뢰형성 요인과 구매의도에 미치는 영향에 관한 연구
이호근,이승창,성대원,Lee, Ho-Geun,Lee, Seung-Chang,Seong, Dae-Won 한국경영정보학회 2003 Asia Pacific Journal of Information Systems Vol.13 No.2
Trust has been identified as a key component in many e-Commerce studies. The purpose of this study is to find out which factors play a major role in building trust and how the built-up trust affect consumer's purchase intention in Internet used-car transactions. Based on the information asymmetry, TAM(Technology Acceptance Model), and the trust theory, our research model includes factors such as a buyer's propensity-to-trust, institutional characteristics(inspection and warranty policy), word-of-mouth referral, perceived size, and perceived benefits as independent variables. The model also includes trust as a mediate variable, intention to purchase as a dependent variable and perceived quality risk as a moderate variable. The research model is tested by analyzing 787 sample data gathered from Internet used-car transaction sites. The result shows that the trust has significant effects on the online purchase intention, and institutional characteristics has been identified as the most significant factor for the trust of Internet used-car sites. The independent factors influencing trust vary depending on the level of perceived quality risk. For users who perceive the quality risk low, the perceived benefits explain a little portion of the purchase intention. However, those who perceive quality risk high would purchase used-cars only when they have trust on the Internet sites, indicating that trust play an important role as a mediate variable. This study suggests that enhancing the trust in Internet used-car sites is important to increase online transactions.
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ER-Valve 작동기를 이용한 Two link Robot의 위치제어
이호근,김휘동 한국공작기계학회 2001 한국공작기계학회 춘계학술대회논문집 Vol.2001 No.-
This paper presents performance analysis of two-linked robot system using ER (electro rheological) valve actuators. An ER fluid consisting of soluble chemical starches (particles) and silicone oil is made and its field-dependent yield stress is experimentally distilled using electro-viscometer. From this result, the design parameters of ER valve are determined. Based on parameter study, an ER valve system is designed and manufactured. Furthermore, the measured pressure drop is compared with predicted one obtained from the Bingham model. Following the evaluation of field-dependent pressure drop of ER valve, a two-linked robot system with two ER valve actuators is then constructed and its governing equation of motion is derived. From this equation, ND controller is established. Consequently, control performances of the proposed two-linked robot system featuring ER valve are evaluated.
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(Tl$_{0.5}$Pb$_{0.5}$)(Sr$_{2.8-x}$Ca$_x$Pr$_{0.2}$)Cu$_2$O$_{7-z}$ 계의 초전도 특성
이호근,김진 한국물리학회 2016 새물리 Vol.66 No.10
Polycrystalline samples of (Tl$_{0.5}$Pb$_{0.5}$)(Sr$_{2.8-x}$Ca$_x$Pr$_{0.2}$)Cu$_2$O$_{7-z}$ with 0 $\leq x \leq$ 2.3 were synthesized by using a solid- state reaction method. The structure and the physical properties were investigated by means of X-ray diffraction and transport measurements. We observed that the 1212 phase was mainly formed for compositions with values of $x$ above 0.4 and that nearly single-phased samples were obtained for samples with 0.6 $\leq x \leq$ 1.0. The maximum zero $T_c$ of 100.8 K was observed for the Ca-doped sample with $x$ = 0.8. Contrary to the expectation for homovalent substitution, the value of $T_c$ decreased as the Ca-doping content was increased above $x$ = 0.8. The superconducting behaviors induced by Ca doping are discussed in conjunction with the change in the hole concentration estimated from the thermoelectric power. (Tl$_{0.5}$Pb$_{0.5}$)(Sr$_{2.8-x}$Ca$_x$Pr$_{0.2}$)Cu$_2$O$_{7-z}$ 계 시편을 고상 반응법으로 합성한 후 그 구조와 물성을 X-선회절 및 수송특성 측정을 통해 연구했다. Ca 치환량 $x$가 0.4이상일 때 1212 상이 형성되었으며, $x$ = 0.6 - 1.0의 조성에서 거의 단일상 시편이 합성되었다. $x$ = 0.8 일 때 100.8 K의 최고 임계온도 특성이 관측되었다. 등가원소의 치환에도 불구하고 예상과 달리 Ca 치환량이 0.8 이상으로 증가될 때 임계온도가 감소했다. 상온 열기전력 측정결과는 Ca 치환량 $x$ 가 1.0 이상으로 증가될 때 임계온도가 감소하는 것은 치환으로 시편의 홀 농도가 최적 상태보다 감소되는 것과 연관됨을 지시해주었다.
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불순물 치환을 통한 Ru$Sr_2$EuCe$Cu_2$$O_z$ 계의 강자성 천이온도의 조절특성
이호근,김영호,권오현,Lee H. K,Kim Y. H,Kwon O. H 한국초전도학회 2004 Progress in superconductivity Vol.6 No.1
We investigated the effects of impurity doping on the electrical transport and magnetic properties of $(Ru, Sn)(Sr, La)<_2$$EuCeCu_2$$O_{z}$ samples. We found that Sn substitution fur Ru causes a significant decrease of the volume fraction of ferromagnetic phase, as well as a decrease of the temperature where the ferromagnetic component is observed. La substitution for Sr leads to an increase of the magnetic ordering temperature with a moderate change of ferromagnetic component. The experimental results are discussed in conjunction with the structural data, transport properties and a possible change of oxygen content.
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이호근 한국체육철학회 2003 움직임의철학 : 한국체육철학회지 Vol.11 No.1
Sport Culture : Steal to Living Yi, Ho-Kun(Korea University) Sport is the ideology. In a sense, this argument is like to say draw'a round square'. It can be a very dangerous idea that has a contradiction to logic because, traditionally, sport is considered as a physical activity and ideology is bounded on the spiritual. However, understanding the close relationship between sport and culture, it is not challenged idea that sport can be decoded the ideology-sport culture:steal to living-as a counter culture. Thus, I focus on the argument that a thorough and reflective study of 20 century sport culture is a necessary to prepare a possible 21 century sport through the analysis and synthesis of sport culture based on the understanding of culture. 국문초록스포츠는 관념이다. 어떤 의미에서 이 말은 마치 ‘둥근 삼각형’을 그려보라는 것처럼 들린다. 전통적으로 스포츠란 신체적 영역의 것으로, 관념이란 정신적 영역의 것으로 간주되었기에 논리적으로 모순되는 위험한 발상일지도 모른다. 그러나 스포츠와 문화의 긴밀한 연관성을 이해할 때 스포츠도 관념일 수 있다는 이 반문화적 해석-스포츠 문화:훔쳐야 사는 사회-은 더 이상 도전적 발상은 아니다. 따라서, 필자는 문화의 이해를 통한 스포츠 문화의 분석과 종합, 20세기 스포츠 문화의 철저한 반성적 연구는 21세기 가능한 준비의 일환으로 필연적이다란 사실에 주목한다.
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축소 모형 실험을 통한 정거장내 적정 배연방식에 관한 연구
이호근,김명우,이필영,김남석 한국방재학회 2008 한국방재학회논문집 Vol.08 No.04
If fire is occurred in the subway, the train must be moved to the closest station and make passengers get off the train. As a matter of fact, the Fire of Dae-gu Subway was coped with this way. But, the fire smoke extraction system of real subway stations have not designed to deal with fire of trains yet. Therefore, we have to establish a plan of station railroad for preventing from unexpected damage when the fired train comes to the station. The purpose of this study is to establish the effective smoke extraction measure that is to prevent stations from damage by the scale-down experiment. 지하철터널에서 화재가 발생하면, 열차는 가장 가까운 정거장으로 대피하여 승객들을 하차시켜야 한다. 실제로 대구지하철 화재사고가 이러한 방식으로 대응 하였으나 큰 인명 피해를 초래하였다. 지하철 정거장의 화재배연시스템은 열차화재에 대응할 수 있도록 설계되어 있지 않기 때문에 화재열차의 정거장 진입시 예상치 못한 피해를 유발할 수 있으며 피해방지를 위한 정거장 선로부의 배연계획 수립이 필요하다. 본 연구의 목적은 정거장 선로부의 열차화재시 효율적인 배연방식을 연구하고 승객의 피난 동선 확보를 위해 상층부로의 역류 방지대책을 축소모형실험에 의하여 수립하는 것이다.
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