• KIEAE Journal
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• 제9권1호
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• pp.107-113
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• 2009

The energy cost is resulted from the energy use. Its sources are divided into some types and depended on the building use or energy-use type. The energy cost should be affected by the amount of the energy use. The cost could be calculated to consider various factors such as the insulation, heating type, building shape and others. But it can not consider all of the affect factors to the energy cost and need to categorize the factors to the condition for estimating the cost. In this paper, it aimed at providing the estimation model in linear equation and multiple linear regression, utilizing the building exterior condition and management characteristics in apartment housing. Its survey are conducted in two parts of management characteristics and building exterior condition. The correlation analysis is conducted to get rid of the multicolinearity among the inputted factors. The number of linear equation model is 11 and includes the 1st, 2nd and 3rd equation function, power function and others. Among these, it suggested the 2nd and 3rd function and power function in terms of the statistics. In multiple linear regression model, the building volume and management area are inputted to the estimation.

• 한국생활과학회지
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• 제10권1호
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• pp.57-71
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• 2001

The purpose of this study is to find the relationship between the clothing behavior and the MBTI personality type. I selected the college women of W college 96 grade as an object of this study for MBTI personality type test. It is analyzed to relation according to energy direction, perceiving function, behavior style, and function/temperament of psychology. This study presents the fashion, modesty, ostentation, extravagance, and aesthetic of clothing behavior in relation to MBTI personality type. The results of study is as follows : 1. There was the difference of significant level(P<0.05) between fashion and perceiving function on MBTI preference tendency of personality type. When person having a lot of fashion corrects a information, this person mostly uses the function of intuition among perceiving function. 2. There was the difference of significant level(P<0.05) between modesty and perceiving function on MBTI preference tendency of personality type. Modesty was deeply related to introversion of person having energy direction. 3. There was no difference of significant level between ostentation and energy direction, perceiving function, behavior style, decision function on MBTI reference tendency of personality type. 4. There was shown the difference of significant level(P<0.01) between extravagance and energy direction on MBTI preference tendency of personality type. Extravagance is deeply related to extraversion of person having external experience. 5. There was no difference between aesthetic and clothing behavior. 6. There was no difference between function / temperament of psychology and clothing behavior.

• 대한전기학회논문지:전력기술부문A
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• 제54권7호
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• pp.337-344
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• 2005

An energy function is derived on the basis of the EMM(Equivalent Mechanical Model) to take account of the effects of tap changer, and then the VC(Voltage Collapse) criteria is proposed to predict the voltage collapse in Power systems. The VC criterion can be evaluated by using the energy margin given by the energy gap between UEP(Unstable Equilibrium Point) and SEP(Stable Equilibrium Point) of the energy function adopted, in which it is noted that the energy contour should be considered due to energy discontinuity associated with tap changing. This paper shows that the proposed VC criterion improves the accuracy of voltage stability analysis with application to a two-bus sample system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 E
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• pp.1803-1805
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• 1998

Electron temperature, electron density and electron energy distribution function were measured in Radio-Frequency Inductively Coupled Plasma(RFICP) using a probe method. Measurements were conducted in argon discharge for pressure from 10 mTorr to 40 mTorr and input rf power from 100W to 600W and flow rate from 3 sccm to 12 sccm. Spatial distribution electron temperature and electron density and electron energy distribution function were measured for discharge with same aspect ratio(R/L=2). Electron temperature was found to depend on pressure, but only weakly on power. Electron density and electron energy distribution function strongly depended on both pressure and power. Electron density and electron energy distribution function increased with increasing flow rate. Radial distribution of the electron density and electron energy distribution function were peaked in the plasma center. Normal distribution of the electron density electron energy distribution function were peaked in the center between quartz plate and substrate. These results were compared to a simple model of ICP, then we found out the generation mechanism of Radio-Frequency Inductively Coupled Plasma.

• 대한화학회지
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• 제41권3호
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• pp.123-129
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• 1997

1,3-CHD의 비평면 고리반전 진동운동에 미치는 환산질량 효과를 고찰하기 위하여 원자간의 결합 벡터 모델을 이용한 컴퓨터 프로그램을 작성하였고, 이로부터 큰 진폭으로 운동하는 고리반전 진동운동에 대한 운동에너지 팽창함수를 계산하였다. 1,3-CHD의 운동에너지 팽창함수의 계산에 필요한 구조 파라미터들은 순이론적 HF/6-31G** 방법에 의하여 결정하였으며, 이 화합물의 비평면 고리반전 진동운동에 대한 위치에너지 함수는 운동에너지 팽창함수와 이전에 보고된 저주파 라만 데이터를 이용하여 결정하였다. 그 결과 1,3-CHD의 비평면 진동좌표에 대한 운동에너지 팽창함수를 고려하여 진동 Hamiltonian을 계산하였을 때 1,3-CHD의 고리반전 진동운동에 대한 보다 신빙성 있는 비평면 위치에너지 함수를 결정할 수 있었다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2009년도 제36회 동계학술대회 초록집
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• pp.148.1-148.1
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• 2009

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 학술대회 논문집 전문대학교육위원
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• pp.159-162
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• 2006

In this paper energy distribution function in $SiH_4$ has been analysed over the E/N range 0.5${\sim}$300Td and Pressure value 0.5, 1.0, 2.5 Torr by a two-term approximation Boltzmann equation method and by a Monte Carlo simulation. The motion has been calculated to give swarm parameters for the electron drift velocity, diffusion coefficient, electron ionization, mean energy and the electron energy distribution function. The electron energy distribution function has been analysed in $SiH_4$ at E/N=30, 50Td for a case of the equilibrium region in the mean electron energy and respective set of electron collision cross sections. The results show that the deduced electron drift velocities, the electron ionization or attachment coefficients, longitudinal and transverse diffusion coefficients and mean energy agree reasonably well with theoretical for a rang of E/N values.

• Architectural research
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• 제12권1호
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• pp.39-47
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• 2010

This paper describes a topology optimization technique which can maximize the fundamental frequency of the structures. The fundamental frequency maximization is achieved by means of the minimization of modal strain energy as an inverse problem so that the strain energy based resizing algorithm is directly used in this study. The strain energy to be minimized is therefore employed as the objective function and the initial volume of structures is used as the constraint function. Multi-frequency problem is considered by the introduction of the weight which is used to combine several target modal strain energy terms into one scalar objective function. Several numerical examples are presented to investigate the performance of the proposed topology optimization technique. From numerical tests, it is found to be that the proposed optimization technique is extremely effective to maximize the fundamental frequency of structure and can successfully consider the multi-frequency problems in the topology optimization process.

• Journal of Electrical Engineering and Technology
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• 제6권2호
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• pp.161-166
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• 2011

This paper proposes an algorithm for determining critical generator lists using accelerating power and synchronizing power coefficient (SPC), and critical generator group (CGG) from CGG candidates, which is a combination of critical generators. The accurate determination of CGG provides a more accurate energy margin while providing system operator with information of possible unstable generator group. Classical transient energy function (TEF) method selects the critical generators with big corrected kinetic energy of each generator at the moment of fault removal. However, the generator with small acceleration after fault, that is, the generator with small corrected kinetic energy, is also likely to belong to CGG if the generator has small synchronizing power. The proposed algorithm has been verified to be effective compared with the classical TEF method. We utilized the power system of Korean Electric Power Corporation(KEPCO) as a test system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.241_242
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• 2009

This paper presents a method to assess total transfer capability (TTC) by using energy function. To get the critical energy, the potential energy boundary surface(PEBS) method which is one of the transient energy function(TEF) method is used. TTC assessment is to calculate TTC by using the repeated power flow (RPF) method. It is seen that energy margin can be use to assess available transfer capability(ATC).