• Journal of the Korean Society for information Management
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• v.32 no.3
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• pp.155-182
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• 2015

This study came up a library thought and the theory of cataloging through analyzing the life and writings of Seymour Lubetzky who founded the principals of cataloging in the twentieth century. This study investigated the historical social, ideological, and cultural context, using a literature survey and the methodology of historical research. Moreover, this study aimed a comprehensive research based on the results of domestic and foreign fragmentary studies, and analyzed the effects of Lubetzky's thought of cataloging. Thus, this study found Lubetzky's library and cataloging thought. The theory of cataloging that analyzes the above findings is the design of cataloging rules and a bibliographical relationship establishment. First of all, the principles of descriptive cataloging should contain the necessity, simplicity, unity, consistency, finality, and the characteristics of interrelations, and clarify the purpose of cataloging. The bibliographical relationship is built on dividing a work as an intellectual product into a book as a physical substance. Moreover, a basic entry is entered on the basis of author names for planning the concentration of works, and a corporate name and an anonym are contained in the author names for extending the concept of author.

• Journal of the Korean Society for information Management
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• v.30 no.3
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• pp.133-156
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• 2013

The purposes of this study are (1) to examine the relationships among attitude on SNS use, subjective norm, perceived behavioral control, and SNS use, (2) to analyze effect of SNS use on bonding network and bridging network, (3) to consider moderating effect of the gender on the relationship between SNS use and Social network. We conducted a survey for 20-30's SNS user. The results of analysis using the Structural Equation Model(SEM) represent that attitude on SNS use, subjective norm, and perceived behavioral control are significant determinants of the SNS use. SNS use affects bonding network and bridging network. An interesting result was observed that the gender had moderating effect on the relationship between SNS use and social network. Based on these results, we suggest theoretical and practical implications of this study.

• Journal of Digital Contents Society
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• v.18 no.1
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• pp.47-54
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• 2017

In this research, I analyze cases of character packages in Japane, extract the concept of design that was loved by consumers and inmates and succeeded in marketing, and aim to establish the logic and principle. In addition, in the future, when introducing and utilizing the character package design in Korea, this research intends to make a guideline for the development of objective validity and empathic package design. After identifying the design concept and finding the principle by targeting package design of five character of Tohato which mixed various media and expanded sales, I want to find out the cause of success. Therefore, I have studied the theory and principles of enterprise and creative in product strategy through case analysis of character design concept and character package design. As a result, a design that leaving the functional side, having a story, making memories, and inducing a sense of closeness was as a successful case of renewal. In the package design, in some cases, package design execution is more important under the theoretical system according to consumer behavior analysis and Promotion of bold design concept of the design for the success of that concept, deviated from the existing principle.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.10 no.1
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• pp.163-172
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• 1990

The filter criteria of geotextiles to prevent excessive loss of fine particles in cohesion-less soils are largely depend on the flow conditions of water in soil/geotextile systems. In the soil/geotextile system under uni-directional flow conditions, it is adequate to retain only the coarse soil fraction because a 'self-induced' soil filter layer may form in cohesionless soil adjacent to the geotextile. In alternating flow conditions, however, a complete soil filter layer within the soil will not form and thus the geotextile pores must be small enough to retain finer particles of the soil to be protected. Based on these concepts, theoretical filtration criteria of geotextiles are developed considering the flow conditions of water. To test the validity of these criteria, laboratory testing was carried out. This indicated that large losses of fine particles would result, especially at high hydraulic gradients, short periods and low vertical loads. The revised filtration criteria are proposed evaluating effect of various design factors.

• Journal of the Korean Geotechnical Society
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• v.19 no.4
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• pp.55-64
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• 2003

Desiccation of a soil is basically the removal of water by evaporation, which is controlled by evaporativity and evaporability. Surface evaporation improves the trafficability which is essential for the access of construction equipment in the area reclaimed with soft clay. The existing traditional methods for evaluating evaporation can not account for the deformation of reclaimed soft soils during evaporation. Therefore, a theoretical model for predicting the rate of evaporation from the surface of a deformable material is proposed. The model is based on a system of equations for coupled heat and mass transfer in unsaturated soils. The modified pressure plate extractor test and glass desiccator test were carried out to obtain the soil-water characteristic curve for a deformable soil. The column drying test was conducted to investigate one dimensional water flow, heat flow and evaporation in the surface. A finite difference program was developed to solve the coupled nonlinear partial differential equations, which permit the study of water, vapor and heat flows in the deformable soil. Comparison between measured and simulated values shows a reasonably good matching between the two.

• The Journal of the Korea Contents Association
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• v.13 no.2
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• pp.412-419
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• 2013

Firm's competitive advantage and profitability can be gained over competitors by human resources and human resource management that are characterized by idiosyncrasies or differentiation. Yet, the results of previous studies have been a emerging consensus that the isomorphism and homogeneity of HRM and HR practices among firms regardless of thoese industrial areas, size, organizational settings, etc. are universal. Based on the previous studies of similarities of HRM, the paper theoretically investigates the background and reasons of introducing similar HR practices among firms. The paper shows the dynamism of HR system in Korean firms, adapting a new HR system. Three types of reasons are found, coercive isomorphism, mimetic isomorphism, and normative isomorphism. However, it is also discussed that there is an important gap in the theoretical and empirical research. More empirical research is suggested in order for gaining meaningful results on HR studies.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.40 no.2
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• pp.217-223
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• 2020

As construction work on soft ground increases, many researchers have studied to secure the stability of trafficability with interest in construction safety accidents due to reinforcement work. Although the stability of soft ground is evaluated based on the allowable bearing capacity of theoretical equations proposed in the literature such as Yamanouchi and Meyerhof formulas, further numerical verification also requires comparison of the stress increase (Δσ_z) and deformation of the distributed contact pressure on the soft ground. In this study, the deformation of the soft ground is compared with the increasing the seam tensile strength of geotextile using the finite element analysis program, and the stress increase is investigated by variation of the distributed contact pressure by appling input data of case study.

• School Mathematics
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• v.8 no.4
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• pp.417-439
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• 2006

Many studies indicate the emerging crisis of education of calculus even though the emphasis of calculus have been widely recognized. In our classrooms, the education of calculus also has been faced with its bounds. Most instructions of calculus is too much emphasis on the algebraic approach, thus students solve mathematical problems without truly understanding the underlying concept. The purpose of this study is to develop mathematization teaching and learning materials and methods in caculus based on the mathematization teaching and learning theories by Freudenthal and the variability principles of conceptual learning by Dienes, In order to this purpose, first, we analyzed the high school mathematics II textbook of 7th curriculum in Korea. Second, we developed mathematization teaching and learning materials and methods in highschool calculus. Consequently, the following conclusions have been drawn: we have reorganized and reconstructed the context problem in calculus based on concepts of tangent line and instantaneous rate of change.

• Journal of Digital Convergence
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• v.10 no.11
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• pp.243-251
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• 2012

Digital items, considered as virtual assets, include avatars, accessories for the avatars, digital wallpapers, and game items, etc. The objective of this study is to examine the factors influencing the purchase of digital items. Factors, based upon Uses and Gratifications theory, including image making, self-expression, social awareness and fun-seeking, are introduced as salient variables for purchasing digital items. In addition, social identification and flow are also considered as key motivators. Statistical results indicates that social identification affects both flows and the intension to purchase digital items, and then flow next influences intension to purchase. It was also found that motives based upon Uses and Gratifications theory influences social identification, but have no impact on flow. As a conclusion, the academic and practical implications of these findings are also discussed.

• Journal of the Korean Geotechnical Society
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• v.27 no.7
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• pp.35-45
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• 2011

Cost effective design and construction are necessary to establish the design concept of tunnel lining. Loosening load acting on the concrete lining is compared with Terzaghi tunnel theory and numerical analysis. It is analyzed under the condition of weathered rock and soil with varying in-situ stress ratio ($K_0$). Based on the result, loosening load calculated by Tcrzaghi tunnel theory is much greater than numerical analysis results. And the load calculated in weathered soil is lager than weathered rock condition. As in-situ stress ratio increases, the stress acting on the tunnel lining decreases in Terzaghi theory rapidly, whereas there is little effect in numerical analysis.