• Elastomers and Composites
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• v.37 no.3
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• pp.170-176
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• 2002

Effects of type and loading level of process aids on the rheological and mechanical properties of styrene-butadiene rubber (SBR) compound were investigated. Five commercial grades of process aids composed of fatty acids and their various derivatives such as metal salts, esters, alcohols and amides were selected. The reduction in Mooney and shear viscosities was higher for metal salt-type process aids but lower for the process aids containing high molecular weight fatty acid alcohols and esters with increasing the loading of process aids. Tensile modulus generally decreased, while heat-build-up increased with increased process aids content. No considerable effect was observed for ulimate properties such as tensile strength and elongation at break.

• The Research Journal of the Costume Culture
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• v.28 no.1
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• pp.30-44
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• 2020

Bootleg fashion emerged from the fashion industry after 2010, and has been used across a range of different genres. However, it has yet to be theoretically established; therefore, this study will explain bootleg fashion as a new genre, which will help in the planning and designing of products within domestic fashion brands. The purpose of this study was to examine the characteristics and internal meaning of bootleg fashion as a recently emerged fashion phenomenon that borrows from other brands without permission. The research methodology included a theoretical literature review of fashion sites and related materials and empirical research using case analysis. Results of the analysis of both characteristics and internal meaning of bootleg fashion suggest the following characteristics: "unauthorized use of symbolic elements," "disorganization of boundaries between fashion," "multiplicity through globalization," and "newness through deconstruction and recombination." Internal meanings derived from the analysis were "parody through symbol," which is seen as "a parody and homage resulting from the unauthorized use of a brand," while "decomposition through disorganization" is seen as a break-up of the boundaries between different fashions from a mainstream-oriented perspective. A juxtaposition of elements was demonstrated by "playfulness through transformation," which showed that such fashion cannot coexist with positional transposition. Finally, "spread as a cultural phenomenon" was derived through the diffusion through digital media with DIY culture. As such, bootleg fashion has been reborn as an innovative fashion genre, breaking the taboo of the illegitimate from the past and demonstrating new endeavors.

• Journal of Family Resource Management and Policy Review
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• v.10 no.1
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• pp.53-66
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• 2006

This study was designed to get basic informations for the purpose of making healthy leisure environment of college students, and which will improve the satisfaction of their school life. Five hundreds of college students in Daegu and Gyeongbuk area were questioned by, our questionnaire during April, 2005. The data of 405 students (165 men, 240 women) Were analyzed by SPSS WIN 12.0 program. The data of 210 were from Daegu and 195 were from Gyeongbuk area, The results are as follows, First, $80\%$ of those questioned spend their leisure time doing some activities and the satisfaction degree was medium... They get the informations about leisure mainly through internet and the purpose of their leisure activities, were, to get rid of stress. Second; It was shown that their main leisure activities were doing internet, meeting friends, and listening music on weekdays, meeting friends, watching movie and doing internet on weekend. The major activities of the students during vocation were meeting friends, doing internet, and watching TV. Third, the students are concern about their leisure life, and they think that leisure life make improve the quality of life. The last, there is a correlation between quite activities such as watching TV, and dynamic activities such as a mountain-climbing leisure life satisfaction on weekdays. On weekend, however, there is a correlation between dynamic activities such as sports and the leisure life satisfaction. Moreover, on summer (winter) break personal activities such as religious activities and the leisure satisfaction.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.10a
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• pp.84-87
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• 2010

We manufacture an antifuse OTP (One-time programmable) cell for analog trimming which will be used in power management ICs. For the antifuse cell using dual program voltage of VPP (=7V) and VNN (=-5V), the thin gate oxide is broken down by applying a voltage higher than the hard break-down voltage to the terminals of the antifuse. The area of the manufactured antifuse OTP cell using $0.18{\mu}m$ BCD process is $48.01{\mu}m^2$ and is about 44.6 percent of that of an eFuse cell. The post-program resistances of the antifuse are good with the values under several kilo ohms when we measure twenty test patterns.

• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.193-198
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• 2008

Now days with the significant grows of internet and PC hardware/software, most of the business, include small size business and soho, is worked by PC/Network. However these critical changes, all the PC/Network system or service is identical and these make user a inconvenient experience and unpleasant aspect to PC/Network. This research is to segment the user bases on the user context of using PC and all this segmentation was done in contextual design process. From Contextual Interview, all data of user context of environment, use case, needs, voices, break downs were captured and these data were interpreted and filtered to affinity notes and user modeling. After the interpretation, the consolidation was being held by affinity diagram, which could make ready to segment the user. For the result, 3 segmentation was evaluated and which are the 'Holistic Networker', 'Unplugged Controller' and 'Passive Reactor'.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.531-534
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• 2004

Cutting work of the concrete pile is an important task to chsh a part of pile head which is compressed with more than $800kgf/cm^{2}$. It is usually performed by a crusher and three to four skilled workers. llecent analysis results of the pile cutting work reveal that it frequently makes a lot of cracks which significantly reduce the strength of the pile and is labor-intensive work. The primary objective of this study is to propose the end-effector which can effectively break PHC Pile without any longitudinal cracks before developing an automated pile cutting machine having unified grinder and crusher parts. It is anticipated that the development of the automated pile cutting machine would be able to bring improvements in safety, productivity, quality as well as cost saving.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.21 no.5
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• pp.791-799
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• 1997

The wear characteristics and wear mechanisms of plasma sprayed Al/sub 2/ O/sub 3/-40%TiO/sub 2/ and Cr/sub 2/O/sub 3/ deposited on casting aluminum alloy(AC4C) were investigated. Specimens were processed for various coating thicknesses. Ball on disk type wear tester was used for wear test. The scratch test on plasma sprayed coating surface showed that critical load to break the coating layer was greater than 40 N. The critical load increase with the increase of coating thickness of specimens. The friction coefficient of Cr/sub 2/O/sub 3/ coating layer was less than that of Al/sub 2/O/sub 3/-40%TiO/sub 2/ coating layer. The wear resistance of Cr/sub 2/O/sub 3/ coating layer was greater than that of Al/sub 2/O/sub 3/-40%TiO/sub 2/ coating layer. Microscopic observation of worn surfaces was made by SEM. SEM observation showed that the main mechanism of wear for Al/sub 2/O/sub 3/-40%TiO/sub 2/ coating layer was abrasive wear under 50 N. For the case of Al/sub 2/O/sub 3/-40%TiO/sub 2/ coating layer, as the surface cracks perpendicular to sliding direction propagated, the wear debris was generated in wear track. However, the main mechanism of wear for Cr/sub 2/O/sub 3/ coating layer was brittle fracture under 150 N.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.34 no.8
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• pp.1059-1065
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• 2010

An analysis was conducted to predict the hydraulic performance of a reactor coolant pump (RCP) of SMART at the off-design as well as design points. In order to reduce the analysis time efficiently, a single passage containing an impeller and a diffuser was considered as the computational domain. A stage scheme was used to perform a circumferential averaging of the flux on the impeller-diffuser interface. The pressure difference between the inlet and outlet of the pump was determined and was used to compute the head, efficiency, and break horse power (BHP) of a scaled-down model under conditions of steady-state incompressible flow. The predicted curves of the hydraulic performance of an RCP were similar to the typical characteristic curves of a conventional mixed-flow pump. The complex internal fluid flow of a pump, including the internal recirculation loss due to reverse flow, was observed at a low flow rate.

• Bulletin of the Korean Chemical Society
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• v.35 no.7
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• pp.2013-2018
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• 2014

The adsorption and decomposition of trimethylene oxide ($C_3H_6O$) molecule on the Al(111) surface were investigated by the generalized gradient approximation (GGA) of density functional theory (DFT). The calculations employed a supercell ($6{\times}6{\times}3$) slab model and three-dimensional periodic boundary conditions. The strong attractive forces between $C_3H_6O$ molecule and Al atoms induce the C-O bond breaking of the ring $C_3H_6O$ molecule. Subsequently, the dissociated radical fragments of $C_3H_6O$ molecule oxidize the Al surface. The largest adsorption energy is about -260.0 kJ/mol in V3, V4 and P2, resulting a ring break at the C-O bond. We also investigated the decomposition mechanism of $C_3H_6O$ molecules on the Al(111) surface. The activation energies ($E_a$) for the dissociations V3, V4 and P2 are 133.3, 166.8 and 174.0 kJ/mol, respectively. The hcp site is the most reactive position for $C_3H_6O$ decomposing.

• Journal of the Korean Society of Clothing and Textiles
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• v.30 no.2 s.150
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• pp.207-220
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• 2006

The purpose of the study is to develop the basic pattern of casual jacket for men aged between 25 and 34. Compared to the tailored jackets, casual jackets are designed much more diverse form depending on the target customer, price range and moreover fashion trend. Therefore in order to reduce the cost and time of developing new style, pattern draft from the basic pattern is better approach rather than develop each style form the measurements every time. For men's casual jacket pattern draft, the basic pattern of fit and comfort was developed through following research procedures. 173 men were surveyed about their habit of buying and wearing of casual jackets. MDs and pattern designers of 10 casual wear brands for men were interviewed. As a starting point, 3 different basic patterns were selected. 2 patterns were from the 2 interviewed brands and the last one was the pattern of ESMOD. The 3 patterns were studied by means of comparing measurements and general styling. As a results it was found that the pattern of S brand is featuring I silhouette, the pattern of K brand is featuring H silhouette and the pattern of ESMOD is featuring Y silhouette. The results of wearing test showed that the pattern of S brand is the best among the three. They were to add ease around the chest line and waist line, to relocate the waist line and the break point, to increase the jacket length and upper arm width. The improved pattern was made of polyester for the wearing test. The wearing test showed developed pattern was improved significantly. To verify the use of developed basic pattern, two buttoned single jacket was made.