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송치훈,최해운,Song, Chi Hun,Choi, Hae Woon 대한용접접합학회 2014 대한용접·접합학회지 Vol.32 No.2
Dual laser heat sources were used for polymer based material joining. An infrared camera and thermocouple DAQ system were used to correlate the temperature distribution to computer simulation. A 50 degree tilted pre-heating laser source was acting as a heating source to promote the temperature to minimize thermal shock by the following a welding heat source. Based on the experimental result, the skin depth was empirically estimated for computer simulation. The offsets of 3mm, 5mm and 10mm split by weld and preheat were effectively used to control the temperature distribution for the optimal laser joining process. The closer offset resulted in an excessive melting or burning caused by sudden temperature rising. The laser power was split by 50%, 75% and 100% of the weld power, and the best results were found at 50% of preheating. To accurately simulate the physical laser beam absorption and joining optical properties were experimentally measured for the computer FEM simulation. The simulation results showed close correlation between theoretical and experimental results. The developed dual laser process is expected to increase productivity and minimize the cost for the final products.
송치훈,이덕희,강정연 한국인터넷전자상거래학회 2023 인터넷전자상거래연구 Vol.23 No.5
The goal of this study was to identify factors that determine the acceptance of cloud computing (CC), by integrating dependability attributes with the technology acceptance model. Simultaneous application of structural equation modeling (SEM) and machine learning (ML) indicates that availability, reliability and maintainability are direct predictors of CC acceptance, but security is not. Availability and reliability act as antecedents on the usefulness and the ease of CC, but the effect of security on CC is significant only in the case of the relationship with the ease of use of CC. CC acceptance is predicted by the usefulness, and the ease to use mediates the relationships between dependability attributes and usefulness. Overall, the ML achieved higher prediction accuracy than SEM. This study provides researchers and practitioners with empirical evidence to deepen understanding of the drivers of CC acceptance.
프랜차이즈 시스템에서 가맹본부 요인과 가맹점 요인이 갈등원인으로서 기회주의에 미치는 영향
송치훈(Hyun-Soo Ha),강민성(Hyun-Soo Ha),편해수(Hyun-Soo Ha) 한국중재학회 2020 중재연구 Vol.30 No.4
본 연구에서는 프랜차이즈 시스템에서 가맹본부의 기회주의 기회주의에 영향을 미치는 요인을 거래 비용 이론, 힘-의존 이론의 관점에서 분석하였다. 가설검증 결과, 가맹본부의 지원이 가맹본부의 기회주의에 부정적인 영향을 미칠 것이라는 가설 1은 지지되었다. 또한, 가맹본부와의 관계에 대한 가맹점의 거래특유투자는 가맹본부의 기회주의에 긍정적인 영향을 미칠 것이라는 가설 2와 가맹본부에 대한 가맹점의 의존은 가맹본부의 기회주의에 긍정적인 영향을 미칠 것이라는 가설 3도 지지되었다. 마지막으로, 가맹점간 경쟁 강도가 가맹본부의 기회주의에 긍정적인 영향을 미칠 것이라는 가설 4는 지지되지 않았다. 본 연구의 이론적, 실제적 시사점은 다음과 같다. 본 연구의 이론적 시사점은 거래비용 이론, 힘-의존 이론을 적용하여 프랜차이즈 시스템에서 갈등을 야기하는 가맹본부의 기회주의에 영향을 미치는 요인을 실증하여 이론적 공백을 채웠다는 점이다. 또한, 본 연구는 프랜차이즈 시스템에서 가맹본부의 기회주의의 선행 요인을 확인하여 기회주의를 낮추기 위해 무엇을 관리해야 하는지를 파악할 수 있는 실무적 시사점을 제공하고 있다. 본 연구의 한계와 향후 연구 방향은 다음과 같다. 첫째, 프랜차이즈 시스템에서 가맹본부의 기회주의에 영향을 미치는 요인의 모든 것을 반영하지는 못했다는 점이다. 향후 연구에서 다양한 추가요인을 종합적으로 반영할 필요가 있다. 둘째, 본 연구는 가맹점 관점에서만 진행되었다. 향후 연구에서는 가맹점 관점뿐만 아니라 가맹본부 관점도 동시에 검토함으로써 보다 정확한 연구결과를 얻을 수 있을 것으로 기대된다. In this study, the factors affecting opportunism that causes conflict in the franchise system between franchisor and franchisee were analyzed based on the transaction cost theory and power-dependency theory. Hypothesis 1 states that franchisor support will negatively affect opportunism. Hypothesis 2 expresses that franchisee transaction-specific investment on the relationship with the franchisor will positively affect opportunism. Hypothesis 3 asserts that franchisee dependency on the franchisor will positively affect opportunism. All of these were supported. However, Hypothesis 4, maintaining that franchisee competitive intensity will positively affect opportunism, was not supported. The theoretical and practical implications of this study are as follows. This study has identified the antecedents of franchisor opportunism that causes conflict in the franchise system by comprehensively applying the transaction cost theory and power-dependency theory. This study can also identify what a company should manage specifically to lower opportunism by identifying the antecedents of franchisor opportunism in the franchise system. The limitations of this study and the directions for future studies are as follows. First, not all of the antecedents of franchisor opportunism in the franchise system have been extensively investigated from the transaction cost theory s and power-dependency theory s viewpoint. In the future, it is necessary to identify additional factors. Second, the study was conducted only from the franchisee s perspective. In future studies, more accurate research results can be obtained by simultaneously examining the franchisee s point of view and the franchisor s point of view.
송치훈(Chi Hun Song),홍서유(Seo Yoo Hong),정수미(Soo Mi Chung),한경철(Kyung Chul Han),박철범(Chul Bum Park),신봉규(Bong Gyu Shin) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.3
Ovarian cysts in the newborn are uncormnon. Fetal ovarian cysts are being diagnosed with inaeasing fiequency with development of obstetrical sonography. Most of these cysts are found within the first few months of life and have no clinical significance. But, a large ovarian cyst would be founded antenatally with sonography. A large ovarian cyst can cause life-theatening complications during parturition and in the neonatal period. We have experienced a case of fetal ovarian cyst in a 32-year-old primiparous woman with antenatal sonography and report our experience with a brief review of literatures.