• 한국가구학회지
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• 제11권1호
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• pp.45-51
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• 2000

일반적으로 도막의 강성은 목재의 강성에 비해 낮으므로 도장된 소재의 강성이 백골재에 비해 낮아질 것으로 짐작할 수 있으므로 본 연구에서 는 바이올린용 소재 인 유럽산 가문비 나무와 단풍나무에 투명 래커와 전통옻칠을 도포한 후, 진동모드를 해석하고 공진주파수를 비교함으로써 수종별 도료 종류에 따른 음향특성의 변화양상을 분석하고자 하였다. 분석결과, 도장전후의 기본진동모드는 동일하였고 양 수종 공히 도료의 종류에 관계없이 도장재의 공진주파수의 감소가 확인되었으며 가문비나무의 경우, 모드가 증가할수록 주파수 감소폭이 증가하였으나 옻칠이 투명래커에 비해 그 감소폭이 적었다. 단풍나무의 경우에도 상위 모드에서 더 큰 주파수 감소를 나타냈지만 옻칠과 투명래커의 주파수 감소폭이 일정치 않았다.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2013년도 자성 및 자성재료 국제학술대회
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• pp.95-95
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• 2013

The NdFeB magnet can be classified into the sintered magnet and bonded magnet. The former has superior magnet characteristics but the degree of freedom in shape is highly restricted, whereas the latter has a high degree of freedom, but its magnet characteristics are inferior to the former. When a NdFeB magnet is used at the elevated temperature, part of Nd must be replaced with a high priced Dy to increase its coercive force. For these reasons, a Dy free and high performance NdFeB bonded magnet is desired strongly. The author successfully developed a Dy free NdFeB anisotropic bonded magnet based on discovery of new phenomena called as d-HDDR reaction and its mass production process such as a thermally balanced hydrogen reaction furnace, micro capsuled powder, compression molding / injection molding under magnetic field, magnetic die and so on. Applied to DC brush seat motor for automotive use, the motor has become 50% small in size and weight. The commercialization of a half sized motor for automotive use has been realized up to the market share of 30%. At present, its commercialization is extending to various types of motors such as power tool, ABS motor, wiper motor, window motor, electric bike power motor, and compressor motor. It is expected that the applications will be increasingly enlarged to EV motor, wind generator, EPS motor, washing machine, and glass cutting machine. This innovative technology has realized Dy free high performance magnet and mudt make big contribution to not only rare element strategies but also energy conservation.

• 복식문화연구
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• 제25권3호
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• pp.315-326
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• 2017

The purpose of this study is to investigate the design methods and characteristics of papercraft fashion from 2001 to 2015. The study has been conducted through theoretical research and case study. Overall, types of papercraft expressions are classified into the following four categories: narrative papercraft fashion, organic papercraft fashion, variable papercraft fashion, and recycling papercraft fashion. The characteristics and aspects of each type of papercraft is described below. First, narrative papercraft fashion expresses as factual description of the natural environment. These works convey fantastic image by showing fairy tale animals or plants using paper folding or cutting. Second, organic papercraft fashion creates a futuristic shape by expressing organic parts in nature. Also, it often depicts future-oriented images by repeatedly representing organic shapes using uniform patterns in nature. Third, variable papercraft fashion expresses a variety of changing shapes through a flexible design based on the style of wearing. This variation may be accomplished through changeable dress connected to human gestures. Variable papercraft represents play-fulness, which conveys enjoyment to the wearer and the audience. Fourth, recycling papercraft fashion uses paper materials of the past, and recreates them into artworks through handicraft techniques. Recycling papercraft conveys high value added fashion by dissolving the material into pulp.

• 대한치과기공학회지
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• 제21권1호
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• pp.87-96
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• 1999

In order to examine the influence of sprue(used to make crown supplements) on casting, 3 kinds of sprue materials(wax, wood, plastic) and 3 types of sprue(round, square, triangle) were made and buried and cast, then the comparison and analysis of casting characters among sprue materials and among sprue type show the following results : 1. The comparison of casting characters in accordance with sprue materials shows wax sprue of 83.3%, wood sprue 81.3%, and plastic sprue of 80.7%, Wax sprue was the bast materials for casting, However there was no statistically significant difference of casting characters among was, plastic and wood. 2. The comparison of casting in accordance with sprue types shows square sprue of 94.0%, round sprue of 86.9% and triangle sprue of 84.2%. square sprue had a best casting character. 3. When a ring cast using wood sprue was classified from burying materials. its cutting of casting body and sprue indicated much more than any other sprue material. It seems to be caused by the influence of wood residuals and carbon occurrence.

• 복식
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• 제58권9호
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• pp.38-50
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• 2008

In the late Joseon period, as Korea suffered from two battles such as Byeongjahoran and Imjinweran, the people wanted to find comfortable shelters, which caused Bigi to prevail. That is, as an alternative to find a shelter which is physically prosperous and mentally comfortable and to get out of turbulent days, the people desired the utopian world of Sipseungji. The Sipseungji of 'Namsako' was deeply rooted in the society, which had a great impact on it. However, it is very surprising to find that the Sipseungji is metaphored in the process to make the shapes of Korean $J{\check{o}}gori$ which are a represented product of our culture. In other words, the ideal world we desired is a clothe itself which wraps human bodies, not any mysterious place that can not be found. They wanted to deliver the assumption that the ideal world is in humans themselves through clothes. Though a shaman sign of Sip (meaning ten), the Sipseungjiseol of Namsako became rooted in the living of the common people, which caused social confusion, but the Sipseungji suggests that as humans are the very lucky place, the utopian world is in themselves. Therefore, it should not be overlooked that the shapes of Korean $J{\check{o}}gori$ have instructional values that can not be found in those of other foreign cultures.

• 복식
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• 제67권2호
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• pp.88-100
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• 2017

This study is for the textiles of at Sun Am Temple and characteristic of embroidery. Tak Ui was composed of orange body and green upper cover, and had no strings. The body plate was covered with embroidery, with Gauze base, and upper part was appliqued, by cutting dragon pattern, cloud pattern on satin damask. The thread for embroidery was silk floss, silk twisted thread, rapped gold thread, and rapped silk thread. For padding, it was used cotton thread in the part of dragon's scales. It was used satin stitch, outline stitch, split stitch, couching, and counted stitch, etc. as method of embroidery. In particular, it embroidered counted stitch of diamond shape consecutively on the whole of Tak Ui, it does so with counted stitch of same effect of weaving Brocade in the part of cloud. Besides, it is one of the characteristic for couching rapped silk thread. Such lead embroidery is the popular method in the Ming dynasty of China, in the 16~17 century. The design of Tak Ui is dragon, cloud, and wave in the theme. In the center, 'Seong-su-man-nyeon' was placed on the heads of dragon. This is similar to Dragon Robe of Four-petalled medallion patterns, period of Ming dynasty in China. Therefore, it confirmed that Tak Ui was remodeled the embroidered textiles, made for royal robe, originally, with Tak Ui at temple.

• Journal of Mechanical Science and Technology
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• 제18권7호
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• pp.1055-1061
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• 2004

In this research, a vision system for detecting breakages of small-diameter taps, which are rarely detected by the indirect in-process monitoring methods such as acoustic emission, cutting torque and motor current, was developed. Two HMI (Human Machine Interface) programs to embed the developed vision system into a Siemens open architecture controller, 840D, were developed. They are placed in sub-windows of the main window of the 840D and can be activated or deactivated either by a softkey on the operating panel or the M code in the NC part program. In the event that any type of tool breakage is detected, the HMI program issues a command for an automatic tool change or sends an alarm signal to the NC kernel. An evaluation test in a high-speed tapping machine showed that the developed vision system was successful in detecting breakages of small-diameter taps up to M1.

• 한국기계가공학회지
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• 제15권2호
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• pp.22-30
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• 2016

It is very important to obtain the net shape of the product to maximize the shear cutting surface of fine blanking. In this paper, the fine blanking die was manufactured to achieve part characteristics, such as flatness and a fully sheared surface. The V-ring in the fine blanking die was designed to prevent lateral movement of the material. The fine blanking experiment was conducted with the fine blanking die. The material usage rate was increased by over 5.7% and that of the water-soluble lubricant was decreased by over 33% when the 2-cavity die technology was applied to fine blanking. The capacity of the existing press could lead to productivity improvement and cost reduction. Thus, 2-cavity die technology for fine blanking with a minute module of an accurate gear for producing seat recliner parts was developed.

• 한국기계가공학회지
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• 제16권5호
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• pp.31-39
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• 2017

Research in the machine tool industry has focused on ICT-based smart machines rather than hardware technologies related to machine tools. Real-time tool-status monitoring is representative of this type of technology and has become important for measuring sensors during cutting processes. In this paper, we studied several research areas and used a round bar to conduct fundamental research into the axial displacement of the main spindle of a tool when it was subjected to a machining load. We were able to use the gap sensor to detect the axial displacement indirectly by using grooves with various shapes on the round bar and sensing the gaps between the grooves. We then determined the optimal groove shape for monitoring the tool state.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.739-742
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• 2007

토적계산의 수량산정을 위한 지형정보시스템은 공사전후의 수치지형도를 토대로 과거와 현재의 지형변화를 예측케하며 지형변화에 대한 시각적 판단으로 도모한다. 본 사례연구는 경제성, 기술뿐 아니라 자연적 요인을 고려한 종합적 검토를 수행하여 개발 계획 및 개발과정에 대한 타당성을 검정하고, 이를 위해 시공 전의 지형적 형상과 시공 후의 현황을 바탕으로 다양한 기하학적 분석을 수행함으로써 향후 토적계산을 산정하는데 유용한 자료로 활용할 수 있을 것이다.