• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.05a
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• pp.635-636
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• 2010

• Journal of the Korean Society for Precision Engineering
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• v.23 no.8 s.185
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• pp.203-210
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• 2006

This paper focuses on the development of RT technology suitable for manufacturing a small quantity of metal prototype of a precise part from an RP master. Dimensional accuracy and surface roughness are evaluated from Thermojet part of a 3D printer, and effective post-processing method is introduced. Investment casting is done using a prototype built from 3D printer as a wax pattern. Ceramic shell investment casting technique is developed to build a prototype with materials mostly wanted. Also, experimental result shows this research is very useful in manufacturing of a small quantity of functional part or a test part of a specific material.

• Fashion & Textile Research Journal
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• v.19 no.1
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• pp.11-18
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• 2017

The purpose of this study is to investigate the trends of Hanbok pattern research published in journals and theses. We collected 70 articles related to the Hanbok pattern. The articles were divided into 7 chronicles based on publishing year, and analyzed by journal, publishing year, research theme, wearing subject and research pattern. Researches can be categorized into journals, university research paper, and master's theses. After 1981, studies on the pattern of Hanbok have been continuing. Most researches were focused on traditional Hanbok, especially about Jeogori. Research on modernized Hanbok started from Vchronicle(2001~2005), but it has not progressed anymore. According to the analysis on wearing subject, the number of research for female Hanbok was almost three times that of the male. Most researches were performed on adult Hanbok, and subjects were expanded to children, adolescents and middle-aged. The body shape of the wearer did not mentioned on many articles. Pattern researches started from excavated costume, but most researches were about commercial patterns. These researches on the pattern on Hanbok have shown an increasing tendency as the years passed, but researches on modernized Hanbok, including Hanbok pattern development for modern life style should be conducted more actively. In an aging society, as the number of middle-aged consumers increases, pattern research on middle-aged or older people and their various body shapes should be necessary.

• Journal of the Korean housing association
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• v.20 no.6
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• pp.67-76
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• 2009

As the needs of housing for the elderly has increased, many researches have been carried out and some housing projects for the elderly including nursing home began to be provided. Most researches have focused on the development of housing type or space layout and only several ones on interior design. The interior design in house influences physically or psychologically on the elderly who lives in. Also, the subject of them which examined the needs or preference for housing for the elderly were the middle-aged, not the aged. The purpose of the study was to examine the preferred characteristics of interior design in residential space by the elderly. The structured interview with 120 old persons who lived in Busan was carried out using by a questionnaire and 3D images. The elderly answered about the preferred interior style, color, lighting and interior finishes of each room in house, such as living room, master bedroom, kitchen, and bathroom. On the basis of the findings, the characteristics of interior design of each room in house which the elderly preferred were presented. In general, they preferred the mixed interior style with tradition and modem. Also, the reddish and purple interior color, flower or plant patterned wall finishes, and wood floor were preferred in living room and master bedroom by the elderly. The white interior color and one colored wall finishes without any pattern were preferred in kitchen and bathroom.

• Fashion & Textile Research Journal
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• v.8 no.5
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• pp.562-570
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• 2006

Knit industry requires versatile knit designers who have to control whole process such as material select, color, type of machine, technique, structure and shape. In other words, knit designers urgently need to interplay between technology and design aesthetics. It becomes essential to learn and master basic principles of knitting in order to design and develop effectively for innovative knitwear design. The main purpose of this study is to show fresh methodology through examining the various applications of 'Stitch transfer knitting structure' used in women's knitwear design development. Stitch transfer knitting structure is one of the most popular techniques among various basic knitting methods. Eight knitwears were designed and produced with various types of formative applications which differ from existent stitch transfer knitwears of flat and simple style in the market. These are produced by computer knitting machine 'Shima Seiki 122S' and programmed by 'Knit CAD' software. Among various basic stitch transfer pattern, 'Leaf' pattern is selected as a most effective example for this study. This fabric applied to collar, sleeves, body pattern and accessories as formative decoration. It is expected that this study of methodology helps to get open mind and to indicate possibility to develop and show creative and innovative knitwear and knitted textile design.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.11
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• pp.3066-3073
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• 2009

Joint paths of master and branch pipes are induced mathematically for many kinds of joint patterns between both pipes in 3-axis pipe profile-cutting machines. By compensating them with a kerf width, the real cutting paths are determined, and their CL-data are generated, and the tool paths generated by CL-data are verified by a ghost function. A bevelling of welds is implemented through tilting a cutting torch in the $\beta$-axis direction for 8 sections in the chuck rotation of $\alpha$-axis. A PLC controls simultaneously position and velocity in a real time for $\alpha$, X, $\beta$-axis by loading CL-data generated. We developed the PLC-controlled 3-axis pipe profile-cutting system which can cut a master or branch pipe along the cutting path and simultaneously do a bevelling process.

• Polymer(Korea)
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• v.30 no.5
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• pp.407-411
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• 2006

The SiC-based ceramic nanopatterns were prepared by placing polydimethylsiloxane (PDMS) mold from DVD master on the spincoated polyvinylsilaeane (PVS) or allylhydridopolycaybosilane (AHPCS) as ceramic precursors to fabricate line pattern via UV-nanoimprint lithography (UV-NIL), and subsequent pyrolysis at $800^{\circ}C$ in nitrogen atmosphere. As the dimensional change of polymeric and ceramic patterns was comparatively investigated by AFM and SEM, the shrinkage in height was 38.5% for PVS derived pattern and 24.1% for AHPCS derived pattern while the shrinkage in width was 18.8% for PVS and 16.7% for AHPCS. It indicates that higher ceramic yield of the ceramic precursor resulted in less shrinkage, and the strong adhesion between the substrate and the pattern caused anisotropic shrinkage. This preliminary work suggests that NIL is a promissing route for fabricating ceramic MEMS devices, with the development on the shrinkage control.

• Journal of the Korean housing association
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• v.15 no.3
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• pp.43-51
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• 2004

The purpose of this study is to examine the physical characteristics of the detached housing area in the housing site development district. The process of this study is to investigate the characteristics of the physical structure and the building use, then to analyze the relationship of physical structure and the building use in the aspect of the morphological characteristics. The case study focuses on the Chil-kok2, An-Siml in Taegu. The streets pattern is composited gird and loop type mixed. The block is composited by 2 lots in general. But the obscurity of organization and character of the streets, the size and shape of lots which is not fit to the building use. A whole residential characters appears high residential density ratio. so residential environment became worse. The improving level of residential environment and efficiency of land use in the detached housing area of the housing site development district, firstly the propriety of the physical structure must be considered about detached house characters, and the housing uses which fit to the physical structure are needed, and also for the concrete realization of this, the designation of district, the zoning of residential area, the guideline of the district design, and establishment of comprehensive master planning in detached housing area are needed in aspect of the housing policy. As the result of this study, it suggests several design guideline to improve housing site development.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.10a
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• pp.137-140
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• 1997

In general, stereolithography parts is not suitable for master pattern. Because of its bad surface roughness. Therefore, To reduce roughness it requires post-process that is depending on user skill and takes long time to do. This study aims to develop an expert system which can select an optimal build orientation, reduce roughness and shorten post-processing time. Genetic Algorithm was introduced for optimization. A simplified computation model was developed for real-time response. For accurate roughness estimation, mterpolation of experimental data was implemented.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.06a
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• pp.46-49
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• 2003

Microsystem technology (MST) which originated from semiconductor processes has been widely spreaded into tile other industry such as sensors, micro fluidics and displays. The MST, however. has been troubled in spreading with its high cost and material limitations. So, in this paper, new process for micromolding technology using silicone rubber mold was introduced. Silicone rubber mold, which was fabricated by vacuum casting. can be transferred a master pattern to a final product with the same shape but different materials. In order to verify the possibility of application of silicone rubber mold to the MST, its transferability was evaluated. and then it applied to the fabrications of polishing pad and PDP barrier ribs.