• Journal of Nutrition and Health
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• v.10 no.4
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• pp.5-9
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• 1977

• Proceedings of the Zoological Society Korea Conference
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• 2000.10a
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• pp.63.1-63
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• 2000

No Abstract, See Full Text

• Structural Engineering and Mechanics
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• v.73 no.4
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• pp.407-426
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• 2020

In this present paper, a semi-analytical mesh-free method is employed for the three-dimensional free vibration analysis of a bi-directional functionally graded piezoelectric circular structure. The dependent variables have been expanded by Fourier series with respect to the circumferential direction and have been discretized through radial and axial directions based on the mesh-free shape function. The current approach has a distinct advantage. The nonlinear Green-Lagrange strain is employed as the relationship between strain and displacement fields to observe thermal impacts in stiffness matrices. Nevertheless, high order terms have been neglected at the final steps of equations driving. The material properties are assumed to vary continuously in both radial and axial directions simultaneously in accordance with a power law distribution. The convergence and validation studies are conducted by comparing our proposed solution with available published results to investigate the accuracy and efficiency of our approach. After the validation study, a parametric study is undertaken to investigate the temperature effects, different types of polarization, mechanical and electric boundary conditions and geometry parameters of structures on the natural frequencies of functionally graded piezoelectric circular structures.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2002.04a
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• pp.155-160
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• 2002

Recently, the development of aerospace and automobile industries has brought new technological challenges, rebated to the growing complexity of products and the new geometry of the models. High speed milling with a 5-Axis milling machine has been widely used fur 3D sculptured surface parts. When turbine blades are machined by a 5-axis milling, their thin and cantilever shape causes vibrations, deflections and twists. Therefore, the surface roughness and the waviness of the workpiece are not good. In this paper, the effects of cutter orientation and the lead/tilt angle used to machine turbine blades with a 5-axis high speed ball end-milling were investigated to improve geometric accuracy and surface integrity. The experiments were performed using a lead/tilt angle of 15$^{\circ}$ to the workpiece with four cutter directions such as horizontal outward, horizontal inward, vertical outward, and vortical inward directions. Workpiece deflection, surface roughness and the machined surface were all measured with various cutter orientations such as cutting directions, and lead/tilt angle. The results show that the best cutting strategy for machining turbine blades with a 5-axis milling is horizontal inward direction with a tilt angle.

• International Commerce and Information Review
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• v.15 no.2
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• pp.411-428
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• 2013

This study presented practical directions for logistics network unification services, storage and shipment automation in order to prepare advanced strategies for warehouse management systems(WMS) of e-trade using network technology. The WMS technology using UPnP network will be a new paradigm in logistics and distribution. To meet desires of our society and develop successful unified logistics services, what is proposed in this study should be properly performed and it is important to have proper attitude to deal with new changes. Therefore, this study aims to present a base for interpretation of WMS using UPnP network rather than its technological directions.

• Journal of the Korean housing association
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• v.17 no.5
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• pp.127-136
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• 2006

The intent of this study is to propose future planning guidelines and directions of the mixed-use buildings in the residential land development district in country-side cities, based on the concept that the neighborhood facilities are to be strategically laid out in a convenient location and planned in a proper manner for a healthy, safe, friendly and new neighborhood environment. For this purpose, seventeen mixed-use buildings which had been built in Shin-Eum housing development district in Gimcheon from 1995 until 2004 were chosen and investigated in terms of architectural characteristics in that process with surveying and analyzing those. The scope of investigation on case studies was that site size would be below 400 square meters, total area below 1500 square meters, and the number of stories below five stories high on the ground. Method of investigation on those was through field investigation, field photographs, recordings and drawings on those. Investigative contents have been divided and analyzed into the quantitative and qualitative factors in urban and architectural dimension. From results of quantitative investigations, five planning guidelines or directions could be obtained. From results of qualitative investigations, five planning guidelines or directions could be obtained. The criteria will be applied to new architectural developments of the neighborhood facilities linked with the small shops.

• Journal of the Korean Institute of Educational Facilities
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• v.27 no.5
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• pp.3-12
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• 2020

The purpose of this study is to suggest some interior design directions for university library in the circumstances of rapid change of user's demand for the library. In order to extract some ideas about designing the library, I analyzed the libraries of UC Berkeley which has tried to transform the existing condition of the building for satisfying user's new needs. Informations of compositions, layouts of furnitures and book shelves, environmental conditions of 25 branch libraries of UC Berkeley, and spatial behavior patterns in libraries were surveyed and analyzed to get insights to design a new model of library buildings. The interesting phenomena got from the survey is that most of the library users used their own laptop computer in the library regardless of environmental conditions of the library or book types. In conclusion, as the library is changing to the place of studying, not of reading books, four design directions for the library are suggested in this research as like these; 1) Establishing a Regulation Free Environment for a user, 2) Enhancing the Aura of Books as an Interior Design Element, 3) Supplying Personalized Spatial Characters, and 4) Providing an Impactful Space.

• Journal of the Korean Institute of Telematics and Electronics
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• v.26 no.9
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• pp.1428-1435
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• 1989

In this paper we propose a new algorithm which extracts spatial arrangement information of texture elements in structural textures. In the proposed algorithm, by the use of projection information in several directions obtained from the texture image we can get two directions which determine the texture structure and the parallelogram grid which isolates texture elements. The isolated texture elements are analyzed and used to synthesize texture images. Computer simulation shows that the proposed method can extract proper spatial structure of the texture element even when the texture image is highly corrupted by additive noise.

• The Korean Journal of Applied Statistics
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• v.1 no.1
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• pp.1-11
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• 1987

The Government is making every effort to improve the quality of statistics as well as the statistical system as a part in the sixth Five-year Economic and Social Development Plan which started from 1987. With regard to development plan, this paper is aiming to show the directions for improvement and development of the government statistical activities conforming to new socio-economic situation by reviewing and analysing the developing stage and the current circumstances and problems of statistics.

• Proceedings of the KGS Conference
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• 2004.05a
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• pp.94-94
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• 2004

In this paper the author surveys the available literature on "bioregionalism", a relatively new intellectual tradition evolved from the North American environmental social movements of the 1970s and 1980s. The so-called "bioregional approach" is gaining acceptance among environmental planners in North America and elsewhere, and has attracted the attention of some geographers. (omitted)ographers. (omitted)