• 경영과학
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• 제15권2호
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• pp.125-142
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• 1998

The aggregation on linear large-scale dynamic systems is examined in this paper and a "two-step" approach is proposed. In this procedure, the aggregated system consists of two subsystems. The first subsystem represents aggregation through the retainment of dominant eigenvalues of the original system, leading to a first approximation of the desired output of the original system. The purpose of augmenting it with a second subsystem is to provide an estimation of the error on the first approximation, thus permitting a second correction to the output approximation and resulting in an output approximation of greater accuracy. Optimization techniques are discussed for the determination of unknown parameters in the aggregated system. These techniques use minimization principles of certain suitable performance indices and are developed for both single input-single output and multiple input-multiple output system. Numerical examples illustrating these procedures are given and the results are compared with those obtained using existing methods. Finally, a pharmacokinetics problem is studied from the aggregation point of view.

• The Journal of Korean Physical Therapy
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• 제5권1호
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• pp.71-77
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• 1993

The baby makes very great strides in the first year of his life. The developmental principles may be summarised as follows : first, the continuous process from conception to maturity, second, the physical manifestation of neural maturation, third, the cephalocaudal direction, from proximal to distal, fourth generalized mass activity to specific individual responses, fifth, reflex dominance to integration. The stages of normal movement development an head control, rolling creeping(on belly), sitting crawling(on hands and on knees), standing and walking. The knowledge of normal movement development needs for the assessment treatment and management of C.N.S. injuried infant.

• Transactions on Electrical and Electronic Materials
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• 제17권1호
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• pp.29-32
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• 2016

Using the various exchange-correlation functionals, such as LDA, GGA-PBE, GGA-PBEsol and GGA-AM05 functionals, first principle studies were conducted to determine the structures of paraelectric and ferroelectric PbTiO₃. Based on the structures determined by the various functionals, the piezoelectric properties of PbTiO₃ are predicted under the density-functional perturbation theory (DFPT). The present prediction with the various GGA functionals are closer to the experimental findings compared to the LDA values. The present DFT calculations using the GGA-PBEsol functional estimate the experimental data more reasonably than the conventional LDA and GGA fucntionals. The GGA-AM05 functional also predicts the experimental data as well as the GGA-PBEsol. The piezoelectric tensor calculated with PBEsol is relatively insensitive to pressure.

• 한국보육학회지
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• 제17권2호
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• pp.45-73
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• 2017

본 연구는 뇌 기반 학습 원리를 적용한 유아디자인교육 활동이 유아의 창의성과 친사회적 행동에 미치는 효과를 알아보는 데 목적이 있다. 실험집단 연구대상은 K광역시에 위치한 I유치원 만 5세반 유아 17명, 비교 집단의 연구대상은 S유치원 만 5세반 유아 19명이다. 실험집단 유아들에게는 8주 동안 16회에 걸쳐 뇌 기반 원리를 적용한 유아디자인교육 활동을 적용하였고, 비교집단은 연령별 만 5세 누리과정에 기초한 미술 교육 활동을 실시하였다. 연구결과는 첫째, 뇌 기반 원리를 적용한 유아디자인교육 활동을 한 실험집단 유아들이 비교집단 유아들보다 창의성의 유창성, 독창성, 민감성 점수가 높았다. 둘째, 뇌 기반 원리를 적용한 유아디자인교육 활동을 한 실험집단 유아들은 비교집단 유아들보다 도움주기, 의사소통 능력, 나누기, 감정이입 및 조절 점수가 높았다. 이러한 결과는 뇌 기반 학습 원리를 적용한 유아디자인교육 활동이 유아의 창의성과 친사회적 행동 증진에 있어 긍정적 영향을 미치며, 이는 유아의 창의성과 친사회적 행동 향상을 돕기 위한 교수 학습방법으로 뇌 기반 원리를 적용한 유아디자인교육 활동이 의미 있는 대안이 될 수 있음을 시사해 준다.

• 동의생리병리학회지
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• 제35권6호
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• pp.211-218
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• 2021

In order to increase the clinical value of an identification of patterns according to the eight principles (IPEP) in Korean medicine practice, The research on the Clinical Practice Guideline (CPG) of IPEP should comprehend the situation of clinical usage of IPEP practiced by Korean medicine doctors at first. Google survey form were emailed to Korean Medicine doctors registered in the Association of Korean Medicine on 04/15/2021 and the survey was closed at 04/22/2021. Data of 505 answered cases were analyzed by Frequency analysis, Chi-Square analysis, correlation analysis for understanding differences by groups. Out of 505 respondents, 57.6% have answered that they are using IPEP. It means that 42.4% of KM doctors don't use in the medical practice reversely in spite of fundamental diagnostic theory. The 64.7% respondents of no using IPEP presented their opinion about the theoretical problem that it is difficult to use because the concept of IPEP is ambiguous. And next, the 52.1% of the respondents expressed that there is no objective tools to measure and record the IPEP evidences in actual implementation. And 49.6% of the respondents also suggested that it is hard to trust and use IPEP similar to the previous comment. Even about 50% of the respondents are carrying out diagnosis and treatment using IPEP, it showed that there were several unsolved problems such as lack of understanding and practical tools or objective indicators for diagnosis of IPEP. Through the above results, the concept, usage, measurement requirements with indices and discriminant logic of IPEP were manifested as the main hopes of attending members of Korean medicine in the survey, so the IPEP CPG should make clear about these difficult but necessary assignment in the near future.

• 한국과학교육학회지
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• 제29권1호
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• pp.22-42
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• 2009

본 연구에서는 현직 교사가 자신의 생애, 특히 교직입문 이후 경력이 경과함에 따라서 접하게 되는 다양한 경험들 속에서 이루어진 교수실행의 연화과정을 탐색하고자 한다. 이를 위하여 구체적으로 교사의 관점에 근거해 교사의 삶을 살펴보는 생애사적 접근을 취하였고, 실천원리 (practical principle)의 변화 중심으로 개별 과학 교사의 교수실행 변화 과정을 상술하였다. 연구 참여자들은 각각 7년차, 10년차 중등 과학교사로 면담 및 수업관찰을 통해 연구 참여자의 교수실행 특징 및 변화 과정에 관한 자료를 수집하였다. 연구 결과로부터 연구 참여자들의 교수실행 변화과정의 특징을 다음과 같이 도출할 수 있었다. 연구 참여자들의 교수실행 변화는 1) 변화를 촉발한 결정적 경험, 이후 2) 기존 교수실행에 대한 적극적인 반성, 마지막으로 3) 교수실행의 구체적인 변화에 직접적인 영향을 미친 경험들이라는 3 요소의 상호작용을 통해 이해될 수 있었다. 이와 같은 교수실행 변화는 실천원리의 지형 (국면) 변화로 나타났다. 과거와 비교하여 변화원 주요 실천원리의 변화 양상은 (1) 기존 실천원리의 강화, (2) 기존 실천원리의 대체 (3) 새로운 실천원리의 형성으로 대별할 수 있었다.

• Management Science and Financial Engineering
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• 제20권1호
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• pp.27-32
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• 2014

This paper introduces three different simulation algorithms of the shifted Poisson distribution. The first algorithm is the inverse transform method, the second is the rejection sampling, and the third is gamma-Poisson hierarchy sampling. Three algorithms have different regions of parameters at which they are efficient. We numerically compare those algorithms with different sets of parameters. As an application, we give a simulation method of the constant elasticity of variance model.

• 대한인간공학회지
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• 제5권2호
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• pp.33-36
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• 1986

Compatiblity is a very generalized concept that has substantial applicablity to various aspects of human factors. It refers to the spatial movement, or conceptual relationships of stimuli and of responses, individually or in combination, which are consistent with human expectations. In this paper, first, several remarks which should be considered in designing the visual display and control of automobile are considered. Also, two advanced designs of visual display and control are suggested based on the compatibility principles.

• 호남수학학술지
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• 제34권3호
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• pp.439-449
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• 2012

In a recent paper, M. Balaj [B] established an alternative principle. The principle was applied to a matching theorem of Ky Fan type, an analytic alternative, a minimax inequality, and existence of solutions of a vector equilibrium theorem. Based on the first author's fixed point theorems, in the present paper, we obtain generalizations of the main result of Balaj [B] and their applications.

• Journal of Oral Medicine and Pain
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• 제25권1호
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• pp.9-28
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• 2000

The purpose of this article, the first part of series, is to describe the general theory applicable to various chromatographic procedures. History of chromatography, separation of matters, classification of chromatography, underlying principles of separation in chromatography, covering resolution, column efficiency, column selectivity, and capacity factor, movement of solute in chromatographic phase, including elution development, displacement development, and frontal analysis, were discussed. Mathematical description of plate theory and thermodynamic viewpoint of retention were emphasized.