• Structural Engineering and Mechanics
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• v.65 no.5
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• pp.573-585
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• 2018

This article presents strain gradient elasticity-based procedures for static bending, free vibration and buckling analyses of functionally graded rectangular micro-plates. The developed method allows consideration of smooth spatial variations of length scale parameters of strain gradient elasticity. Governing partial differential equations and boundary conditions are derived by following the variational approach and applying Hamilton's principle. Displacement field is expressed in a unified way to produce numerical results in accordance with Kirchhoff, Mindlin, and third order shear deformation theories. All material properties, including the length scale parameters, are assumed to be functions of the plate thickness coordinate in the derivations. Developed equations are solved numerically by means of differential quadrature method. Proposed procedures are verified through comparisons made to the results available in the literature for certain limiting cases. Further numerical results are provided to illustrate the effects of material and geometric parameters on bending, free vibrations, and buckling. The results generated by Kirchhoff and third order shear deformation theories are in very good agreement, whereas Mindlin plate theory slightly overestimates static deflection and underestimates natural frequency. A rise in the length scale parameter ratio, which identifies the degree of spatial variations, leads to a drop in dimensionless maximum deflection, and increases in dimensionless vibration frequency and buckling load. Size effect is shown to play a more significant role as the plate thickness becomes smaller compared to the length scale parameter. Numerical results indicate that consideration of length scale parameter variation is required for accurate modelling of graded rectangular micro-plates.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.12
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• pp.8462-8471
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• 2015

It is widely known that consumer satisfaction, as well as consumer voice and loyalty, affect firms' performance. Prior studies on consumer satisfaction have focused on expectancy disconfirmation theory and its effects on satisfaction related to disconfirmation with consumer expectation and with perceived performance. This study classified consumer expectation into should-expectation and will-expectation, and investigated how disconfirmation with these expectations affects consumer satisfaction differently based on regulatory focus. Specifically, for promotion-focused consumers, disconfirmation of will-expectation has a more significant influence on consumer satisfaction than that of should-expectation. For prevention-focused consumers, disconfirmation of should-expectation has a more significant influence on consumer satisfaction. The results of this study provide academic insights that not only generic expectation (will-expectation) but also should-expectation play an important role in determining consumer satisfaction according to regulatory focus. In addition, it is expected that the findings can be used as a guide to manage consumer expectation in practice.

• Journal of the Korean Institute of Landscape Architecture
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• v.15 no.2
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• pp.43-56
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• 1987

The concept of ‘Open Space’ is conceived to be very valuable subject of interest in developing modern settlement system. In Korea, many new and old residential sites have been developed or renewed to fulfil the housing demands. And such trends seem to continue for the time being. What is more, the requirments for more comfortable residential environments, that is deeply concerned with ‘Open Space’, inorease gradually. As a basis for designing more efficent residential environments to fit Korean morden life style, self - grown, traditional and agricultural villages are studied. This study is concenturated on the Open Space System with its socio - cultural and physical backgrounds. For this, data and materials are some widely collected and are analysed focused on the systems and structures of ‘Open Spaee’. Some results from this study are summarized as follow ; 1. It is assumed that the number of houses per village is around 60, and that its area reaches to the radious of 3-4km. 2. ‘POONGSU’is a generally adopted theory based on natural elements like mountians, waters, and orientations when locating villages and composing their spatial structures. As a result of this, the basic structures of villages and Open Space are defined. 3. Circulation system is integrated to the hierachyal order system ; that is, Passing Road \longrightarrowEntry Road\longrightarrowCentral Read\longrightarrowDisperse and Access Road. 4. The natural and agricultural land uses are overlapped with diverse outdoor activities - religious services, play and recreation, relaxation, etc - without any physical modification. 5. At each villages, several artificial and spot - like green facilities are found. And distinctive functions, meanings, and locationalities are given to each of them. On that, they become a visual and psychological centers of each village. 6. In addition to its basic function of circulation, Central Road takes the sence of place for outdoor activities. Because of this charactor, it plays an important role of activating the village life and binding the various Open Space elements.

• Korean Business Review
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• v.12
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• pp.103-118
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• 1999

Many security companies in Korea play the same role as the broker who can do dual trading in the American securities market. It seems that the proper model for the Korean market microstructure should contain the existence of broker. But the broker occupied little attention in U.S. until the early 1990. The purpose of this paper is to review and evaluate the strategic trader models of market microstructure theory which contain the broker as player. Three major models, Sarkar(1995), Chakravarty(1994), Chun, Oh, and Weller(1996) were compared and evaluated critically in the context of the Korean security market microstructure. The model of Sarkar(1995) was evaluated to be more appropriate for the Korean securities market context. Finally, limitations of this paper were indicated and some directions for the further research were suggested.

• CELLMED
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• v.4 no.1
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• pp.3.1-3.8
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• 2014

Spa represents a treatment widely used in many rheumatic diseases (RD). The mechanisms by which immersion in mineral or thermal water ameliorates RD are not fully understood. The net benefit is probably the result of a combination of factors, among which the mechanical, thermal and chemical effects are most prominent. Buoyancy, immersion, resistance and temperature play important roles. According to the gate theory, pain relief may be due to the pressure and temperature of the water on skin; heat may reduce muscle spasm and increase the pain threshold. Mud-bath therapy increases plasma ${\beta}$-endorphin levels and secretion of corticotrophin, cortisol, growth hormone and prolactin. It has recently been demonstrated that thermal mud-bath therapy induces a reduction in circulating levels of prostaglandin E2, leukotriene B4, interleukin-$1{\beta}$ and tumour necrosis factor-${\alpha}$, important mediators of inflammation and pain. Furthermore, balneotherapy has been found to cause an increase in insulin-like growth factor-1, which stimulates cartilage metabolism, and transforming growth factor-${\beta}$. Beneficial anti-inflammatory and anti-degenerative effects of mineral water were confirmed in chondrocytes cultures, too. Various studies in vitro and in humans have highlighted the positive action of mud-packs and thermal baths, especially sulphurous ones, on the oxidant/antioxidant system. Overall, thermal stress has an immunosuppressive effect. Many other non-specific factors may also contribute to the beneficial effects observed after spa therapy in some RD, including effects on cardiovascular risk factors (e.g. adipokines) and changes in the environment, pleasant surroundings and the absence of work duties.

• Journal of the Korean Society of Costume
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• v.56 no.7 s.107
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• pp.58-67
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• 2006

This study of popular culture is in based on an academic point of view and based thereon an investigation of popular culture from a fashion standpoint follows. This study is to suggest that the popular culture theory can be a basic framework to examine the characteristics of fashion Icon and to verify that the characteristics of Fashion Icon is similar to the codes of the popular culture of today, This study considers the characteristics of popular culture as commercialism, mass-media relationship and a symbolic interaction. The images of movie stars projected through diverse entertainment media are the very fashion icons and strong role models that are copied by consumers. Now, the public take the lead in cultural industry, and they create new images as positive receivers of the images of fashion icons, not as mere imitators or followers. Fashion irons have contributed to diversifying the styles of ideal feminine beauty, and their lift pattern and image are one of the major sources to stir up the imagination and inspiration of people. Thus, the times, fashion and entertainment media have continued to evolve, closely affecting one another, and fashion icons play a role of fashion leader, through entertainment media, who takes the initiative in mass fashion without just being confined to the field of entertainment. This study meaningful from the aspect that discussion of popular culture has been placed in a position that recognizes the entity of and interest in popular culture. through this study, I hope that the scope of interest in Fashion design will expand and that approaches to popular culture will become more diversified.

• Fashion & Textile Research Journal
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• v.14 no.6
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• pp.889-897
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• 2012

This study suggests a direction for stage-costume design by making stage costumes based on amusement, eclecticism, and the masquerade, which are the criteria for approaching stage costume designs according to characteristics of the mask theatre presented by P. G. Bogatyryov. The conclusions of this study are as follows. First, criteria to approach stage costume design for mask theatre can be classified into amusement, eclecticism, and masquerade according to the characteristics of the mask theatre presented by P. G. Bogatyryov. Second, the stage costume of a mongrel dog showed amusement through the expression of the image of therianthropy through the combination of a fur-lined vest and wristlet, Korean traditional trousers with the paw-prints of a dog. Third, eclecticism contains diverse characteristics and escapes from being singularly defined due to the fusion of severally different heterogeneous objects. The stage costume differently used a method of wearing clothing in a different period, of choosing clothing materials, and of expressing color in every character to indicate ambiguity to which the drama points through the integration of various expression elements. Fourth, the masquerade present characters (Taembang, Daejang, and Changseok)who simultaneously play the role of fairies after having changed into a white mask and having worn Korean a traditional overcoat (Durumagi) on the original clothes; the, result is the change of the theatrical structure into another time and space inside the theatrical scene of imagination through a concealment of the original clothing.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.27 no.1
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• pp.713-722
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• 2009

Gravity measurement can determine the earth gravitational field, also is the fundamental to the research of earth gravitational field, geodesy and geodynamic, vertical movement of the crust, geoid surface, sea level and climate etc. Recently, National Geographic Information Institute (NGII) introduced FG-5 absolute gravity meter in order to lay a foundation for establishment of Absolute Gravity Network, and furthermore NGII plan to construct about 1,200 multi dimensional and function Unified Control Points(UCP) in nationwide. It will play an important role in development of high accuracy geoid model in South Korea. This paper explains the fundamental theory and method of relative gravity measurement, surveys the relative gravity of 21 stations using latest Scintrex CG-5 relative gravimeter. In addition, it calculates gravity values, compare and analysis gravity survey results using datum-free adjustment and weighted constraint adjustment. The results indicate show that datum-free and weighted constraint adjustment methods are available to determine high accuracy gravity achievement, datum-free method is more advantage than weighted constraint adjustment.

• The Journal of Internal Korean Medicine
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• v.30 no.3
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• pp.525-533
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• 2009

Objectives : There are lots of reports that cardiovascular disease, including hypertension, cerebro-vascular accident, and coronary heart disease, is related to atherosclerotic changes. Increased serum levels of lipids could play a role in these changes. This study aimed to investigate the relationship between PWV and risk factors of cardiovascular disease, including serum lipid values. Methods : This study included 261 subjects ($49.32{\pm}11.79$ years, 112 male) who underwent PWV and serum lipid evaluation. We investigated the correlation between serum lipid values, blood pressure, body mass index (EMI) and PWV. Pearson's correlation and partial correlation analysis were applied to examine the relationship between PWV and risk factors of cardiovascular disease. Results : Serum triglyceride, total cholesterol, systolic blood pressure, and diastolic blood pressure were significantly correlated with PWV. Partial correlation coefficient adjusted by age yielded significant correlation between serum triglyceride, systolic blood pressure, diastolic blood pressure and PWV. Conclusion : In this study, it seems that there are significant relationships between PWV, triglyceride and blood pressure. We could suggest that PWV might have some relationships with Dam-eum and blood stasis in oriental theory.

• Journal of the Korean Institute of Educational Facilities
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• v.18 no.6
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• pp.57-64
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• 2011

This study is the spatial characteristics of child education facilities through the cognitive development of child. Early childhood is the most important period in every human developmental stage; physical, emotional, and mental parts. Thus, the education in early childhood should be conducted naturally by a variety of experiences, sensibility, and physical activities, not by knowledge-oriented education which has been conducted until today. The education based on experience has been adapted, not only domestically, but internationally, and the early childhood education focused on child's development is especially emphasized in Europe. It's because the industrialization started earlier in Europe than in other countries, and it leaded to the entry of women in public affair. Consequently, early childhood education was taken charge of by the nation. While it has gone through trial and error, and Now it leaded to the better way. This study checks the common factors which shows the spatial characteristics based on experience and the relationship between the features of infants and concept of space in Piaget's theory. And then, I am going to systemize the relationship of each factor and suggest the design plan so that it could be applied methodologically when the space is designed for child education facilities beyond the current education only focused on programs.