• 대한한의학원전학회지
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• 제26권2호
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• pp.1-7
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• 2013

Objective & Method : By investigating physiological function of tri-energizer, symptoms, and organ coordination, we obtained following conclusion. Tri-energizer is the membrane structure that surrounds the five visceral organs and six hollow organs, and filled with fluid. Tri-energizer acts as the passage for the flow of qi energy. Result & Conclusion : Therefore, dysfunction of the tri-energizer is caused by abnormal evaporation and metabolism. Upper-energizer regulates cardiopulmonary function, middle-energizer regulates spleen and stomach functions, and lower-energizer regulates liver, kidneys, small and large intestines, and bladder functions. Such a functional specialization is possible by receiving the source of qi through the wall wrapping around the internal organs. Tri-energizer represents the exterior and interior relationship by acting as the membrane structure supporting the five visceral organs and six hollow organs and at the same time, as the pericardium surrounding the heart.

• 한국해양공학회지
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• 제24권6호
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• pp.1-6
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• 2010

A far field approximate solution of the slowly varying force on a 3 dimensional offshore structure in gravity ocean waves is presented. The first order potential, or at least the far field form of the Kochin function, of each frequency wave is assumed to be known. The momentum flux of the fluid domain is formulated to find the time variant force acting on the floating body in bichromatic waves. The second order difference frequency force is identified and extracted from the time variant force. The final solution is expressed as the circular integration of the product of Kochin functions. The limiting form of the slowly varying force is identical to the mean drift force. It shows that the slowly varying force components caused by the body disturbance potential can be evaluated at the far field.

• 한국정보통신학회논문지
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• 제6권8호
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• pp.1269-1275
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• 2002

이 논문은 Bell형 스위칭 함수를 이용하여 가변구조제어계의 도달 기간을 제거하기 위한 새로운 방법을 제공한다. 제안된 방법에 의해 전체 과정동안 도달 기간이 제거된다. trapezoidal형 브러쉬리스 DC 모터의 효과적인 속도 제어를 위해 시변 스위칭 함수를 사용하여 속도 제어기를 구성하였다.

• 아동학회지
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• 제22권4호
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• pp.149-166
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• 2001

This study examined differences in function, structure, and satisfaction of adolescent friendships by differing patterns of internet usage and of real life versus internet friendships. Subjects were 396 male and female 10th grade students. Data were collected with structured questionnaires and analyzed by SPSS. Findings were that the internet functioned as a major field of interpersonal relationships for Korean adolescents. Among 3 types of internet usage patterns, pursuit of interpersonal relationship, constituted most of the functioning and the most intimate friendships and game pleasure had the fewest and least intimate friendships both in real life and on the internet. Subjects addicted to the internet had the most functioning friendships and the highest level of intimacy in friendships. As the level of internet addiction increased, the level of satisfaction in friendships in real life decreased while the level of satisfaction of friendships through the internet increased.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 춘계학술대회
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• pp.1089-1093
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• 2003

The moving least square (MLS) basis is implemented for the real-space band-structure calculation of 2D photonic crystals. The value-periodic MLS shape function is thus used in order to represent the periodicity of crystal lattice. Any periodic function can properly be reproduced using this shape function. Matrix eigenequations, derived from the macroscopic Maxwell equations, are then solved to obtain photonic band structures. Through numerical examples of several lattice structures, the MLS-based method is proved to be a promising scheme for predicting band gaps of photonic crystals.

• 한국CDE학회논문집
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• 제5권4호
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• pp.359-372
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• 2000

Current CAD systems are good enough to be used as a tool to manipulate three-dimensional shapes. This is a very important capability to be owned by a design tool because a major portion of designers'activities is spent on the shape manipulation in the design detailing process. However, the whole design process involves a lot more than the, shape manipulation. Currently, these remaining tasks, mostly logical reasoning process for the function realization together with structure decomposition in the top-down manner, are processed in the designer's brain. To support the top-down functional design process of a mechanical product, a system integrating the functional, structural and geometrical aspects of a product design in a unified environment is presented. Using this system, a designer can perform function decomposition, structure decomposition, and geometry detailing, and function verification activities in parallel and the whole design process it modeled resultantly. Once the whole design process is modeled, any redesign task can be automatically performed with the verification of the desired functions.

• Journal of Magnetics
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• 제17권1호
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• pp.13-18
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• 2012

Starting with Kubo's formula and using the projection operator technique introduced by Kawabata, EPR lineprofile function for a $Mn^{2+}$-doped wurtzite structure GaN semiconductor was derived as a function of temperature at a frequency of 9.49 GHz (X-band) in the presence of external electromagnetic field. The line-width is barely affected in the low-temperature region because there is no correlation between the resonance fields and the distribution function. At higher temperature the line-width increases with increasing temperature due to the interaction of electrons with acoustic phonons. Thus, the present technique is considered to be more convenient to explain the resonant system as in the case of other optical transition systems.

• 한국해양공학회지
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• 제19권3호
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• pp.59-65
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• 2005

In today's industry, the butterfly valve has been used to control a flow effectively. However, it is difficult to have the existing structural optimization using field analysis from CFD to structure analysis when the structure is influenced by fluid. Therefore, an initial model of this study is to evaluate the stability of the valve using FEM and CFD. And, it selected variable using initial analysis results. Also, it accomplished the shape optimization design using the orthogonal arrangement and characteristic function. Research result, a few experiments showed the optimal results of there dimensional structures to be multi-objective.

• 대한기계학회논문집A
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• 제30권2호
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• pp.128-134
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• 2006

Topology optimization is an effective scheme to obtain the initial design concept: however, it is hard to apply in case of non-linear or multi-objective problems. In this study, a modified topology optimization method is proposed to generate a structure of a swing arm type actuator satisfying maximum compliance as well. as maximum stiffness using the multi-objective optimization. approach. The multi-objective function is defined to maximize the compliance in the direction of focusing of the actuator and the second eigen-frequency of the structure. The design of experiments are performed and the response surface functions are formulated to construct the multi-objective function. The weighting factors between conflicting functions are determined by the back-error propagation neural network and the solution of multi-objective function is acquired using the genetic algorithm.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.1176-1180
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• 2008

This paper represents a study on design hypothesis to improve properties of a product. The functional requirements and function structure of various technical products are analysed. From the above analysis we could formulate one hypothesis. This hypothesis also satisfies basic rules clarity, simplicity and safety that are required in all design cases. The hypothesis says that functional requirements is refined to improve and if there are components which have the same function, they can be integrated into one component and improved. A one-handed faucet was developed by applying the above hypothesis to a two-handed faucet. The design of heat exchange tester was be improved successfully through the hypothesis.