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김해중(Hae-Joong Kim),박종우(Jong-woo Park),조동혁(Dong-hyuk Jo) 한국콘텐츠학회 2016 한국콘텐츠학회논문지 Vol.16 No.1
금융위기 이후 경제성장의 정체, 친환경 트렌드의 부상, 스마트폰의 대중화를 배경으로 등장한 공유경제는 불필요한 소비를 줄이고 자원 활용도를 높여 초연결 시대, 소비자 효용 증대 측면에서 주목받고 있다. 따라서 본 연구는 공유경제 서비스의 성공을 서비스 수용 후 지속적 사용으로 규정하고 서비스 이용 경험에서 지속 이용에 영향을 미치는 요인과 그 요인 간 인과적 관계를 실증적으로 검증하였다. 연구결과, 지각된 가치와 네트워크 외부성은 신뢰 및 만족에 모두 유의한 영향을 미치고, 지각된 위험은 신뢰에 유의한 영향을 미치는 것으로 나타났다. 또한 신뢰는 만족과 지속이용의도에 모두 유의한 영향을 미치고, 만족 또한 지속이용의도에 유의한 영향을 미치는 것으로 나타났다. 그리고 지각된 가치와 위험, 그리고 네트워크 외부성은 신뢰와 만족을 매개하여 지속이용의도에 유의한 영향을 미치는 것으로 나타났다. 본 연구를 통하여 최근 그 중요성이 강조되고 있는 공유경제 서비스의 성공 요인과 요인 간 구조적 관계를 확인함으로써 불확실한 경영환경 속에서 공유경제 서비스의 경쟁력을 제고 할 수 있는 계기를 제공하고자 한다. Since financial crisis, sharing economy emerged as a result of economic stagnation, emerging environmental-friendly trend and increasing smartphone penetration, which led to reducing unnecessary consumption and increasing the practical usage of resources. This indicates the possibility that the sharing economy service will develop in this hyperconnectivity era in terms of increasing consumer utility. In this study, the author, therefore, empirically analyzed the factors that affect the continuous usage from the experience of service use and the causal relationship between the factors by regulating the success of sharing economy service as the continuous use after the acceptance of service. The findings demonstrated that the perceived value and network externality had a significant effect on both trust and satisfaction, and the perceived risk had a significant effect on trust. In addition, trust affected both satisfaction and continuous use intention significantly, and satisfaction also had a significant effect on continuous use intention. And the perceived value and risk, and network externality mediated trust and satisfaction, thereby having a significant effect on continuous use intention. Through this research, the author intends to provide an opportunity to enhance the competitiveness of sharing economy service under an uncertain business environment by way of identifying the success factors of the sharing economy service whose important is growing in recently years and the structural relationship between these factors.
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크레아틴 투여와 무산소 운동이 신체조성과 근력기능에 미치는 영향
김해중(Kim Hae-Jong) 한국체육과학회 2006 한국체육과학회지 Vol.15 No.1
The purpose of this study was to investigate how a short-term oral administration of creatine could influence on body composition and isokinetic muscle strength functions. A total of 14 collegiate student was divided equally into two groups; creatine-treated group(CG) and placebo group(PG). The CG consumed creatine for 6 days (4 × 5g/day). The effects of a short-term creatine administration with a high intensity weight training was examined, and it could be concluded as; 1. After the short-term creatine administration with a high intensity weight training, lean body mass was increased and body fat mass was decreased. However, no statistical significance was found. The total body water was increased in CG. 2. The short-term creatine administration increased lower back muscle strength and grip strength in both groups. However, muscle function measured as isokinetic contraction has changed positively. Based on the results, changes of body composition may not be efficient by a short-term creatine administration. In general, increased muscle strength was similar in both groups. Thus, the effect of creatine treatment was not conclusive. But, muscle function measured by using an isokinetic machine showed an efficiency of the treatment The results support a positive effect of creatine. Therefore, creatine administration may not be useful for hypertrophy and muscle strength elevation for general population. However, for those who perform in elite level such as weight lifters or sprinters, the treatment may be highly efficient.
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산호 유래 실리콘 함유 다공성 수산화아파타이트의 합성 및 특성 분석
김수룡,이윤주,송희,이종헌,이강식,김해중,김영희,Kim, Soo-Ryong,Lee, Yoon-Joo,Song, Hee,Lee, Jong-Heon,Lee, Kang-Sik,Kim, Hae-Joong,Kim, Young-Hee 한국세라믹학회 2004 한국세라믹학회지 Vol.41 No.8
생체친화성 인공골 개발을 위하여 해면골과 매우 유사한 기공구조를 갖는 천연 산호(CaCO$_3$, aragonite phase)를 수열처리하여 수산화아파타이트 다공체를 제조하였다. 생체 친화성을 증진시키기 위하여 산호를 수열 처리하는 과정에서 실리콘을 치환시키는 실험을 하였다. 수열합성과 solvothermal 방법을 반복적으로 사용하여 실리콘이 치환된 수산화아파타이트를 합성하였으며 이들의 각 온도에 따른 상변화 및 실리콘 농도를 XRD, ICP, EDS 등을 통하여 분석하였다. 분석결과로부터 실리콘이 수산화아파타이트 골격 내에 균일하게 분산되어 있음을 확인하였다. A porous hydroxyapatite has been prepared using natural coral which resembles human cancellous bone in microstructure. To obtain a biomaterial having a good biocompatibility, substitution of silicon into the hydroxyapatite framework has been attempted. Si substituted hydroxyapatite has been prepared by hydrothermal treatment and solvothermal treatment of the natural coral repeatedly. Si concentration and phase of the Si substituted hydroxyapatite derived from coral have been characterized using a XRD, ICP, and EDS etc. EDS investigation confirmed the presence of silicon in the framework of hydroxyapatite structure.
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Study on Parametric Design of Traction Motor and Dynamic Performance of Electric Vehicle
손도(Tao Sun),권순오(Soon-O Kwon),김용호(Yong-Ho Kim),김해중(Hae-Jong Kim),홍정표(Jung-Pyo Hong) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This paper study the dynamic performance of electric vehicle (EV) by analyzing the traction motor parameters. Using the interior permanent magnet synchronous motor (IPMSM) as the traction motor, the characteristics of motor, such as maximum torque, power factor, constance power speed ratio, and maximum speed are estimated by the saliency ratio of inductance and flux linkage. Then, the relationships between these characteristics and the dynamic performance of EV are established. Thus, the influence of the parameters of the traction motor on the dynamic performance of EV is revealed.
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