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- 저자 : 정상훈 ( Sang Hoon Jeong ) (검색결과 120 건)
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선박·해양 구조물용 YS 460MPa 강재 FCAW 용접금속의 강도와 인성에 미치는 C의 영향
정상훈,엄정호,최한글,정병호,허성화,강창룡,Jeong, Sang-Hoon,Eom, Jeong-Ho,Choi, Han-Geul,Jeong, Byung-Ho,Hur, Sung-Hwa,Kang, Chang-Yong 대한용접접합학회 2014 대한용접·접합학회지 Vol.32 No.6
This paper has an purpose to study the effect of C on the toughness of YS 460 MPa FCAW weld metal. These effects were evaluated by charpy impact and CTOD test about 4 FCAW weld metal containing various C and Si content in relation to microstructure. Increase of C content was helpful to increase AF volume fraction and reduce PF(G) and FS volume fraction by increasing super cooling rate for ferrite transformation. Also, Increase of C content up to 0.045wt% made the strength and impact toughness higher by increasing AF volume fraction. The weld metal containing higher C content indicated higher CTOD value. It is because the volume fraction of PF(G) and FS, can play a role as crack initiation site, was reduced. Effect of C on the strength and elongation of weld metal was higher with an increase of Si contents.
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Solvent - water - 2 - Propanol 삼성분계의 액 - 액평형
정상훈,이진우,박동원 ( Sang Hoon Jeong,Jin Woo Lee,Dong Won Park ) 한국공업화학회 1997 공업화학 Vol.8 No.4
Due to the rising cost of energy, new separation processes based on extraction are becoming more attractive than before. Thus, the need for calculating and predicting liquid-liquid equilibria(LLE) compositions has very much increased. The purpose of this study is to determine the binodal curves, tie lines, plait point, distribution and selectivity for the ternary systems of 2-propanol-water with methyl ethyl ketone, methyl isobutyl ketone, ethylacetate, butylacetate, toluene and o-xylene as solvents at 25℃. And those tie line data were used to examine thermodynamic consistency. The experimental tie line data were correlated with NRTL and UNIQUAC models.
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LPG선 탱크용 FH 강재 FCAW 용접금속의 인장성질과 충격인성에 미치는 후열처리의 영향
정상훈,강창룡,Jeong, Sang-Hoon,Kang, Chang-Yong 대한용접접합학회 2014 대한용접·접합학회지 Vol.32 No.4
This paper has an aim to study the effect of PWHT and its conditions(peak temperature and holding time) on the tensile properties and impact toughness of FCAW weld metal in relation to microstructure. Impact toughness was evaluated to apply the cargo tank of liquified gas carriers under the various PWHT condition of each class societies. On the basis of these study, it was found that PWHT conditions within all class societies affect charpy absorbed energy of weld metal little or no, all PWHT weld metals kept similar level of charpy absorbed energy as as-weld weld metal down-to $-60^{\circ}C$ and finally indicated lower energy value than that of as-weld weld metal at $-75^{\circ}C$. It is because the precipitation of 2nd phase was controlled from welding consumable and the grain size was grown by PWHT.
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제품 사용중 표출되는 사용자의 대표감성 추출 및 상관관계분석
정상훈 ( Sang Hoon Jeong ),이건표 ( Kun Pyo Lee ) 한국감성과학회 2004 추계학술대회 Vol.2004 No.-
본 연구에서는 사용자가 제품을 사용하는 도중에 유발될 수 있는 인간의 감성 변화를 나타낼 수 있는 대표감성들을 추출하고 이들의 상판관계를 분석해 보았다. 우선 다양한 방법을 통해 감성어휘를 수집하여 일정한 기준에 따라 삭제 또는 통합하고 적합성 평가를 위한 두 차례의 설문조사를 실시하여 최종적으로 88개의 감성어휘를 추출하였다. 추출된 감성어휘들을 요인분석을 통해 6개 감성 카테고리로 구분하여 사용자들이 제품을 사용하면서 표출하는 대표감성을 추출하였다. 추출된 대표감성들간에 어떤 상관관계가 있는 지 알아보기 위한 분석에서는 대표감성들 중에서 유쾌성과 신규성이 다른 대표감성에 비해 상대적으로 평균이 높게 나타났고, 우수성은 다른 대표감성에 비해 상대적으로 평균이 낮게 나타났다. 본 연구를 통해 추출된 감성어휘와 대표감성은 제품을 사용하면서 표출되는 인간의 감성을 측정하는 데에 필요한 주관적 평가자료로 활용할 수 있을 것 이다.
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정상훈 ( Sang Hoon Jeong ) 한국감성과학회 2010 감성과학 Vol.13 No.4
Research from many marketing fields shows that the importance of factors which ultimately reflect customers`satisfaction towards a product or service vary with the progression of time. Likewise, the emotions that users experience from using the product can vary with prolonged interaction with the product itself. Thus, research was conducted under the notion that users` emotions at the initial stage of product usage is likely to vary with that at a later stage, when users would have had more experience with the product. In this research, a comparison was made between the emotions felt by customers with first-hand experience with the iPhone and those felt by long-time iPhone users who already had much more opportunities to familiarize themselves with the product. The results of the research conducted above show that, with first usage of the iPhone, users experience a relatively low level of negative emotions(Uncomfortableness) due to the predominance of the users` positive emotions. Over prolonged usage, however, the level of negative emotions associated with the usage of the iPhone has been shown to increase. Still, it is impossible to state that the Uncomfortableness associated with iPhone usage is high in general. In fact, it has been shown that positive emotions were rather experienced by iPhone users both before and after usage, suggesting that the emotions involved during iPhone usage was generally positive. Although more research would need to be conducted to safeguard this claim, it can be generally deduced from the results of this research that:when using a product, positive emotions in terms of the reflective level accounts for much of the negative emotions(i.e. discomfort) associated with behavioral level with regard to the product itself.
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정상훈 ( Sang Hoon Jeong ) 한국감성과학회 2014 감성과학 Vol.17 No.3
Due to recent interest in user experience and its significance, much research surrounding this theme is now being conducted. In this research, I investigated user experience during usage of a product and the satisfaction acquired by it, as well as the relationship between satisfaction of having used a product and whether the user would be more likely to purchase another product from the same company. The same experiment was conducted in South Korea and the United States of America in order to get more generalized experimental results. I found that amongst the six representative user emotions expressed while using a product, two of them correlated the most. First, ‘Satisfaction in Usability’ (the emotions aroused by satisfaction with usage or the practicality of the product); and second, ‘Discomfort or Displeasure’ (uncomfortable or unpleasant emotions expressed while using a product. The above two factors were found to be of the most influence concerning satisfaction of the product. Also ‘Satisfaction in Usability’ was found to be of the most influence in their preferability towards purchasing an item from the same company in the future. The significance of this finding is that aside from focussing on the attractiveness of the product`s exteriors and design, one should be concerned on the ease of usage and effectiveness as well as usability of the product, all of which contribute to how efficiently a consumer will utilize the product. Furthermore, in agreement with previous research concerning the correlation between satisfaction of a product and positive perspective on consecutive purchases, the result of this study shows that the more satisfaction consumers feel after using a product, the more likely they are to purchase additional merchandises from the same company which manufactured the original product.
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정상훈 ( Sang Hoon Jeong ) 한국감성과학회 2010 감성과학 Vol.13 No.3
The development of new technology and diversity in user needs lead mobile phone manufacturers to establish new strategies different from the existing for user attraction. Product identity, and brand image are major strategies for differentiation and adding new values to a product. This research starts with stating emotional brand image as the brand image made by the actual usage and the emotion built from the experience while using the product. This research will compare emotional brand image of the three major mobile phone manufactures in Korea (Brand A, C, and S) using evaluation of six representative emotions from users while using the product. The result of evaluating actual mobile phone users and the emotion built while actually using the product showed the brand image, and especially the emotional side of Korean mobile phone manufacturers. The result of this research itself would not be sufficient to simply state the emotional brand image of Korean mobile phone manufactures, but with further research including age, profession, gender and other demographic factors the result of this research would surely be able to abstract a clearer view of emotional brand image of Korean mobile phone manufactures.
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