• Structural Engineering and Mechanics
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• 제73권1호
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• pp.97-108
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• 2020

This study presents a 4 node, 11 DOF/node plate element based on higher order shear deformation theory for lamina composite plates. The theory accounts for parabolic distribution of the transverse shear strain through the thickness of the plate. Differential field equations of composite plates are obtained from energy methods using virtual work principle. Differential field equations of composite plates are obtained from energy methods using virtual work principle. These equations were transformed into the operator form and then transformed into functions with geometric and dynamic boundary conditions with the help of the Gâteaux differential method, after determining that they provide the potential condition. Boundary conditions were determined by performing variational operations. By using the mixed finite element method, plate element named HOPLT44 was developed. After coding in FORTRAN computer program, finite element matrices were transformed into system matrices and various analyzes were performed. The current results are verified with those results obtained in the previous work and the new results are presented in tables and graphs.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 봄 학술논문 발표대회
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• pp.210-211
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• 2022

Pruning is the most important work for the growth and aesthetics of street trees. It is also the most actively conducted maintenance work. However, the specifications, application methods, and cost criteria for pruning have not been systematically established. This has recently caused a lot of confusion in the practice of street tree pruning, such as indiscriminate pruning and lack of construction costs. Therefore, this study clarified the contents of work according to the form of pruning. It added 'aesthetic pruning,' which takes into account design. In addition, It revised equipment not in conformity with the law and excluded personnel necessary for on-site traffic control so that they could be reflected separately. As a result, this study is expected to contribute a lot to securing appropriate construction costs for maintaining street trees.

• 한국가구학회지
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• 제26권3호
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• pp.267-273
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• 2015

This study is a review on the relationship between furniture purchasers and producers in the Joseon period. Understanding the relationships in our traditional spirit and the Joseon furniture that reflects a aesthetic sense is a meaningful work. Joseon was to build an ideal country which put emphasis on the order and harmony through Theory of 'Yeak' as the confucianism nation. Human aesthetics, which emphasis on the spiritual value by confirmity to nature and forcus on the relaxed, deficient personality rather than completeness was established as the central formative consciousness of the Joseon Dynasty. The nature of things in the confucian scholar prior to the representations of things is expressed in the form of master craftsman's skill and soul. Formative consciousness of the confucian scholar is to realize ideals by communciation and interchange with master craftsman's soul in the form of the Joseon furniture. The beauty of restraint and brevity in the Joseon Dynasty furniture includes meanings and procedures of art work. It implies an orderer's purpose of production and a producer's products. Understanding the spirit of times in the production becomes the cornerstone capable of getting closer to the furniture ultimate proper function. These problems have a very close relationship with the problems of modern people's commnuication. We expect an even higher growth of the furniture by achieving more improved communication based on the consumer's great insight and the producer's passion.

• 한국실내디자인학회논문집
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• 제14권5호
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• pp.114-122
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• 2005

A study of light in Kahn's architecture must be significance as a work in building new architectural space and a new foundation for architecture, as well as clarification of the uniqueness of Kahn's architectural space and search for its significance. In addition, the study provides a greater comprehension of an the concept of Kahn's architecture by clarifying the degree of association of light into other concepts of architecture. Therefore, this study attempts to examine Louis I. Kahn's statement, sketch and work. His sketch along with the characteristics of the technique how to present it also enables comprehension of other aspects of architecture as a means to revive architecture. Khan's use of light enabled the evolution of primarily two types 'specular surface' and 'unique opening part' by associating them with the need to diminish glaringness. Each of these types has been evolved individually and is indicative of a concept of light that can be largely divided into ' object's light ' and ' space's light ' Object's light refers to a type in which the formative significance of structural part and different directions of light coexist, and its formative characteristics play a role that differentiate places within space. Space's light is present on wall spaces that limit space and exhibits its distinguished role differentiating places within space in the form of 'expression'.

• 한국분말재료학회지
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• 제26권6호
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• pp.528-538
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• 2019

The transition from "More-of-Less" markets (economies of scale) to "Less-of-More" markets (economies of scope) is supported by advances of disruptive manufacturing and reconfigurable-supply-chain management technologies. With the prevalence of cyber-physical manufacturing systems, additive manufacturing technology is of great impact on industry, the economy, and society. Traditionally, backbone structures are built via bottom-up manufacturing with either pre-fabricated building blocks such as bricks or with layer-by-layer concrete casting such as climbing form-work casting. In both cases, the design selection is limited by form-work design and cost. Accordingly, the tool-less building of architecture with high design freedom is attractive. In the present study, we review the technological trends of additive manufacturing for construction-scale additive manufacturing in particular. The rapid tooling of patterns or molds and rapid manufacturing of construction parts or whole structures is extensively explored through uncertainties from technology. The future regulation still has drawbacks in the adoption of additive manufacturing in construction industries.

• 미술이론과 현장
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• 제6호
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• pp.7-25
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• 2008

The following thesis has been composed with the inspiration attained from Paul Ardenne's conception on Contextual Art. In Europe and in the United States, there is a group of artists who emphasize in the importance of artist's participation in social, political, economical, environmental and moral issues. Since the 1960's, these artists have pondered on Modernism's ideas where art is contextually separated from humanly issues whereas the manners of such artists put on emphasis in the intent to participate in the real human social and ethical issues. Forerunner in this field of art such as Wolfgang Leib display hybrid or meta style in their work. His work displays a quadrilateral form of pollen which represents the simultaneous blending of two mixed ideas such as the abstract from the real. Thus heterogeneous style and philosophy which includes a range of medias and today's trend is observed in Contextual Art. Such art form is also found in landscapes where it is not seen as an observable object but rather an interactive object. It is correlated to Arte Povera of the Italian Art Movement, Support-Surface of the French Art Movement and lastly to the Fluxus. Through these art movements, we find a mutual antipathy towards putting art for sales in the capitalism market and reflect the social role of art in postmodern era.

• Safety and Health at Work
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• 제4권4호
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• pp.216-220
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• 2013

A 46-year-old man who had worked as a bumper spray painter in an automobile body shop for 15 years developed lung cancer. The patient was a nonsmoker with no family history of lung cancer. To determine whether the cancer was related to his work environment, we assessed the level of exposure to carcinogens during spray painting, sanding, and heat treatment. The results showed that spray painting with yellow paint increased the concentration of hexavalent chromium in the air to as much as $118.33{\mu}g/m^3$. Analysis of the paint bulk materials showed that hexavalent chromium was mostly found in the form of lead chromate. Interestingly, strontium chromate was also detected, and the concentration of strontium chromate increased in line with the brightness of the yellow color. Some paints contained about 1% crystalline silica in the form of quartz.

• Journal of Preventive Medicine and Public Health
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• 제46권1호
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• pp.39-49
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• 2013

Objectives: This study aims to investigate the prevalence of musculoskeletal symptoms and factors related to daily activities in a representative Korean population. Methods: This study was based on the questions about musculoskeletal symptoms in the Korean General Social Survey 2010. The questionnaire about musculoskeletal symptoms was adopted from Korean Occupational Safety and Health Agency guide, and it includes general characteristics, characteristics of pain, work type, work intensity and a 12-item Short Form Health Survey (SF-12). We utilized the criteria of the National Institute for Occupational Safety and Health to define the prevalence of musculoskeletal symptoms. Demographic, behavioral and socioeconomic factors were analyzed using logistic regression. Results: The prevalence of musculoskeletal symptoms was 38.3%. The prevalence was higher in females, the elderly, those without health insurance, and those with a low income, low education, and occupations with a heavy workload. The prevalence by body part was highest in the back, shoulder, and knee, in that order. The physical component summary and mental component summary of the SF-12 decreased with increasing musculoskeletal symptoms. Conclusions: Musculoskeletal symptoms are very common in the general population, and related to various socio-demographic factors. These results suggest that active prevention and management of musculoskeletal symptoms is needed at a national level.

• 복식
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• 제61권7호
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• pp.80-100
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• 2011

The purpose of this research is to classify that fashion and art in the twentieth century broadened the creative field by individually applying each other's ideas or through collaboration. This paper analyses the work of individual artists and fashion designers who created work on the boundaries of fashion and art. These samples are selected to extract features related to specific periods as it is proposed that contemporary creation has been developed from a combination of fashion and art, sharing their distinct concerns. Accordingly, this research will focus on the collaboration between fashion and art in the twentieth century from the aspect of 'fashion into art'/'art into fashion' in order to analyse the historical flow, and thereby examine the relationship between fashion and art. The cross-fertilization between fashion and art was initiated as an imitation of form in the early twentieth century, and led to a 'new cross-disciplinary form' which exists on the boundary of fashion and art. This paper considers the relationship between fashion and art from the perspective of sharing intrinsic concepts and the creation of a new creative sphere. It analyses the characteristics of the works of fashion designers and artists whose works lie on the boundary between fashion and art.

• 한국정밀공학회지
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• 제26권9호
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• pp.58-63
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• 2009

Silicon carbide (SiC) has been used for many engineering applications because of their high strength at high temperatures and high resistances to chemical degradation. SiC is very useful especially for a glass lens mold whose components demanded to the machining with good surface finish and low surface damage. The performance and reliability of optical components are strongly influenced by the surface damage of SiC during grinding process. Therefore, the severe process condition optimization shall be necessary for the highly qualified SiC glass lens mold. Usually the major form of damage in grinding of SiC is a crack occurs at surface and subsurface. The energy introduced in the layers close to the surface leads to the formation of these cracks. The experimental studies have been carried out to get optimum conditions for grinding of silicon carbide. To get the required qualified surface finish in grinding of SiC, the selection of type of the wheel is also important. Grinding processes of sintered SiC work-pieces is carried out with varying wheel type, depth of cut and feed using diamond wheel. The machining result of the surface roughness and the number of flaws, have been analyzed by use of surface profilers and SEM.