• 대한기계학회논문집
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• 제12권4호
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• pp.705-711
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• 1988

본 연구에서는 대구중공업(주)의 대형선반 베드면 재질과 동일한 회수철(KS D4301 GC30)시편을 선삭가공하고 볼베어링의 레이스를 이용한 구조로 설계된 볼형 표 면로울링기구를 사용하여 로울러 다듬질을 행함으로서 전가공에 따른 가압력이 표면조 도에 미치는 영향을 구명하는데 목적을 두었으며 아울러 로울링 회수에 따른 표면조도, 경도 및 직경의 변화량을 실험적으로 구명하였다.

• Geomechanics and Engineering
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• 제19권5호
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• pp.407-420
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• 2019

This paper illustrates the results of a series of seismic geotechnical centrifuge experiments to explore dynamic structure-soil-structure interaction (SSSI) of two structures (named S1 and S2) installed on ground surface. A dense homogeneous ground is prepared in an equivalent shear beam (ESB) container. Two structural models are designed to elicit soil-foundation-structure interaction (SFSI) with different masses, heights, and dynamic characteristics. Five experimental tests are carried out for: (1) two reference responses of the two structures and (2) the response of two structures closely located at three ranges of distance. It is found that differential settlements of both structures increase and the smaller structure (S2) inversely rotates out of the other (S1) when they interact with each other. S2 structure experiences less settlement and uplift when at a close distance to the S1 structure. Furthermore, the S1 structure, which is larger one, shows a larger rocking and a smaller sliding response due to the SSSI effects, while S2 structure tends to slide more than that in the reference test, which is illustrated by an increase in sliding response and rocking stiffness as well as a decrease in moment-to-shear ratio (M/H·L) of the S2 structure.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 춘계학술대회 논문집
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• pp.775-778
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• 2000

Single point diamond turning technique fur optical crystals is reported in this paper. The main factors influencing the machined surface quality are discovered and regularities of machining process are drawn. Optical crystals have found more and more important applications in the field of modern optics. Optical crystals are mostly brittle materials of poor machinability. The traditional machining method is polishing which has many shortcomings such as low production efficiency, poor ability to be automatically controlled and edge effect of the workpiece. SPDT has been widely used in manufacturing optical reflectors of non-ferrous metals such as aluminum and copper which are easy to be machined for their proper ductility. But optical crystals being discussed here are characterized by their high brittleness which makes it difficult to obtain high quality optical surfaces on them. The purpose of cur research is to find the optimum machining conditions for ductile cutting of optical crystals and apply the SPDT technique to the manufacturing of ultra precision optical components of brittle materials. As a result, the cutting force is steady, the cutting force range is 0.05-0.08N. The surface roughness is good when spindle is above 1400rpm. and feed rate is small. The influence of depth of cut is very small.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2003년도 정기총회 및 추계학술대회
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• pp.295-299
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• 2003

The development of rapid science technology and data communication technology in 1990 was infiltrated into our real lives deeply and drew forth various changes in various sides. According to that with the new definition of the character of space the users' patterns in the space were changed. We come to have a turning point of change with the introduction of personal computer and digital revolution late in the 20th century. Accordingly, this study is to analyze the connected structure of the space on a basis of the apartment model house since 2000 in order to investigate the aspect of changing the space according to the era of informationization. This analysis of space structure makes the characteristics in the era of informationization objectified. And it will understand the distinct change of space by grasping the relations with the connection of space, and predict the direction that the dwelling space heads for the future.

• 복식
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• 제47권
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• pp.125-142
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• 1999

Dancing along with mankind has existed in various ways form old age to the present. This dancing combined with artistic meaning is called the art of dancing. This study is mainly about the functions decorations and expressions of dancing costume and the claracteristics of the costumes by the 20th century designers Leon bakst Oskar Schlemer Pablo Picasso. The dancing costume were not so much different from those of the public from old age to middle age. In 18th and 19th centuries the length of the cotstumes become short from the knee to the thigh. The functions have much to do with the development of dancing for example the appearance of toeshoes. The costumes are designed not to prevent the movements of dancers smooth line in old age and ladylike vend high-blown line in the 18th and 19th centuries. Cotton and hemp textiles are turning into the transparent forms such as lace and gauge. The personal ornaments earings and necklaces have change into the pattern with wings and tassels. The dancing costumes of Leon Bakst Oskar Schlemer and Pablo Picasso are designed after the due consideration of body shape. Bakst focused on the beauty of smooth lines with splendid colors and decorations. Schlemer analyzed the body abstractly and metaphysically and expressed it with detaile and simple lines. Picasso emphasized cubic forms with cubism and expressed the characteristics of costumes with clear colors and smooth curved line. Bakst Schlemer and Picasso made the early 20th century the age of functional dancing costumes putting a light on the concept of space and foundation for the modern dancing costumes.

• 복식
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• 제51권6호
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• pp.147-165
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• 2001

Haute couture denotes a luxurious made-to-order dressmaker's shop. In principle, it refers to a place that is registered with the Paris Apparel Association and has met the size and criteria specified by the association. The features of modern fashion expressed in haute couture have been contemplated by categorizing them into mixed impression appearing in haute couture work pieces. turning the collection event into a spectacle and commercialization for the succession of haute couture. Mixed impression manifested in the haute couture has engendered (1) the creative and dynamic feature (2) eclecticism with popular culture (3) mixed impression of reactionism (4) ethnic characteristics. From the above considerations, one could say that the factors drive the very existence of haute couture and comprise three elements of impeccable backgrounds, They are (1) organizing ability and protective policies of the French fashion industry, (2) relentless experimental spirit of the haute couture designers and (3) Paris that supports creativity and fashion fabrication, have coincided with rising up of the value of persistence on originality of work pieces in accordance with diversifying cultural transformations. consumer-oriented patterns by way of capital symbolized by consumers and restructuring of company operation by each shop. This report describes comprehensive understanding of haute couture, creativity and dynamic power of the haute couture work pieces. Akin to the efforts to maintain the existence of high-grade cultures throughout the overall cultures themselves, haute couture, on the basis of these factors, should also become the motive power through which luxurious culture in fashion is created in the days ahead.

• 한국조경학회지
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• 제25권4호
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• pp.30-38
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• 1998

Nowaday special attention is being paid to the conservation of all species or ecosystmes of sites for public projects. Many environmental conservation policies and projects in Japan emphasize the coexistence of man with nature and close contact with nature. The objectives of this study was to investigate policies and projects for the creation of areas for the close contact with nature in Japan, to characterize change of techniques for the space creation over times, and to classify those policies and projects implemented by many government agencies. This study was mainly carried out by literature survey of laws, policies and projects related to environmental conservation pertinent to national scale. Major findings of this study can be summarized as follows: First, two most significant turning points for the environmental conservation in Japan were the establishment of the Office of Environmental in 1971 and the enactment of many laws influenced by the awareness of global environmental problems since 1990. Second, polices and projects for the creation of areas for the close contact with nature started in 1960s by the Office of Forestry, and focused on planting and development of simple facilities in forests. And the conservation of natural environment, ecological restoration and the expansion of urban green spaces, and the creation of biotopes and other areas for the close contact with nature in urban areas were the major characteristics of environmental conservation in Japan during 1970s, 1980s, and 1990s, respectively.

• 한국실내디자인학회논문집
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• 제22권5호
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• pp.88-95
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• 2013

The purpose of this study is to analyze the phenomenological approaches in Holl's architecture centered on his Nelson-Atkins Art Museum. This study mainly deals with concrete and practical architectural contents based on his recent works rather than existing studies about philosophical point of views to his architecture. Because Holl has had turning point from theoretical research to practical application and development stage. Therefore, this study aims to find out Holl's phenomenological approaches that were different from his early works. Nelson-Atkins art museum shows effect of luminosity as well as inflow of light in the phenomenological experiences of light and space. Holl gave new addition building that he designed contrasts of massing, transparency of material, colors to enhance existence of new building through phenomenological experiences. Narrow and long circulation and various focal points provide multi-view points and overlapped spaces in body experiences As a result, Holl shows shifts from theoretical application to architectural utilization. Nelson-Atkins art museum is important in that this project is one of stating points about this shift.

• KIEE International Transactions on Electrophysics and Applications
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• 제5C권1호
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• pp.33-38
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• 2005

Recently, lasers have become widely used throughout the medical treatment field. Several types of lasers have been used for the purpose of hair removal since the Alexandrite laser was approved by the FDA (Food & Drug Administration) for clinical epilation. In this study, a long-pulsed Alexandrite laser system for hair removal adopting a multi-discharge method in which three flash lamps are turned on consecutively was designed and fabricated. This laser system shows the technology that makes it possible to create extended pulse by turning on three flash lamps consecutively. With this technique, the pulse width can be varied from 4ms∼10ms. Then using this Alexandrite laser system with the pulse width 10ms and the beam size 7mm, hair removal was performed on the back portion of a human hand and leg. This study shows that treatment by the long-pulsed Alexandrite laser produces hair removal with no relevant side effects.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.311-312
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• 2006

In this paper, steering systems for mobile robot with permanent magnet wheels are discussed. The mobile robot with permanent magnet wheels can have three different types of steering and driving configurations; two-wheels, three-wheels, four-wheels. By a Two-WD(Wheel Driving) system, driving and steering characteristics are controlled by ratio of each wheel speeds. Three-WD system is steered by a front wheel and driven by rear wheels. Four-WD system has better stability than two wheel system. Usually the permanent magnet wheel has nearly none slip. Thus turning radius of the mobile robot with three-WD and four-WD System will be increased and the steering and driving system will be complicated. To solve this problem, two magnet wheels with two dummy wheels are used in this study. fuming radius of the developed mobile robot is small and the structure of the robot is simple. It is possible to move forward, backward, to turn left and right, and to rotate freely with two-WD. This study proved that two-WD system is very suitable fur the mobile robot with permanent magnet wheels.