• 음성과학
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• 제11권4호
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• pp.121-127
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• 2004

This study attempted to provide a spectrum analysis for quantitative evaluation of singing voice quality of singing students rather than the presence or absence of the singer's formant. The regression analysis was used to analyse the relationship between ringing quality, SPR, and SPP of singing voice of college student subjects majoring in music. This study measured singing. power ratio (SPR) in 41 singing students. Digital audio recordings were made in sung vowels for acoustic analyses. Each sample was judged by 1 experienced singing teacher and 4 voice pathologists on one semantic bipolar 7-point scales (ringing-dull). The results showed that the SPR and SPP had significant correlations with ringing quality. The SPR had a significant relationship with ringing quality on singing voice in singing students. The SPR can be an important quantitative measurement for evaluating singing voice quality.

• Asia pacific journal of information systems
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• 제29권2호
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• pp.217-247
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• 2019

This paper draws on the interdependence theory to examine the role of power and mutual dependence on the relationship between internal/external diffusion and performance improvement within a supply chain. The results from a survey of 375 respondents show that two patterns of IOS diffusion - internal diffusion and external diffusion - have different impacts on a firm's performance improvement according to differences in power and mutual dependence between two parties in the supply chain.

• Journal of Electrical Engineering and Technology
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• 제9권2호
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• pp.686-694
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• 2014

A power semiconductor device, usually used as a switch or rectifier, is very significant in the modern power industry. The power semiconductor, in terms of its physical properties, requires a high breakdown voltage to turn off, a low on-state resistance to reduce static loss, and a fast switching speed to reduce dynamic loss. Among those parameters, the breakdown voltage and on-state resistance rely on the doping concentration of the drift region in the power semiconductor, this effect can be more important for a higher voltage device. Although the low doping concentration in the drift region increases the breakdown voltage, the on-state resistance that is increased along with it makes the static loss characteristic deteriorate. On the other hand, although the high doping concentration in the drift region reduces on-state resistance, the breakdown voltage is decreased, which limits the scope of its applications. This addresses the fact that breakdown voltage and on-state resistance are in a trade-off relationship with a parameter of the doping concentration in the drift region. Such a trade-off relationship is a hindrance to the development of power semiconductor devices that have idealistic characteristics. In this study, a novel structure is proposed for the Insulated Gate Bipolar Transistor (IGBT) device that uses conductivity modulation, which makes it possible to increase the breakdown voltage without changing the on-state resistance through use of a P-floating layer. More specifically in the proposed IGBT structure, a P-floating layer was inserted into the drift region, which results in an alleviation of the trade-off relationship between the on-state resistance and the breakdown voltage. The increase of breakdown voltage in the proposed IGBT structure has been analyzed both theoretically and through simulations, and it is verified through measurement of actual samples.

• 한국콘텐츠학회논문지
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• 제9권6호
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• pp.145-152
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• 2009

오늘날 우리는 너무나도 많은 이미지들 속에 둘러 쌓여있다. 이러한 이미지들은 각자의 의미들을 내포하면서 의식적이든 무의식적이든 우리의 주체에 영향을 미친다. 푸코는 서구의 뿌리 깊은 이성주의와 합리주의가 알고 보면 자율에 의해 스스로 만들어진 것이 아니라 타율의 권력에 의해 강제로 만들어진 것임을 폭로하고 있다. 이러한 관계 속에 이미지는 특성상 단지 보는 것 만 으로도 감정전달이 잘 이루어지기 때문에 권력에 의해 그 의미가 조정되어져 사람들을 통제하고 규합하는 권력의 수단으로서 사용되어져왔다. 테크놀로지와 미디어의 발달은 이미지를 재현의 대상에서 벗어나 조작과 변형, 복제의 새로운 패러다임을 가져왔다. 이제 이미지는 보이지 않는 파놉티콘을 형성하며 권력형성과 또 이에 대항하는 대응관계로 변화여 가고 있다.

• The Korean Journal of Ecology
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• 제27권1호
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• pp.27-33
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• 2004

Cryptomeria japonica plantation was monitored every year during 15 years from 1983 to 1997 for stem diameter and volume. The reciprocal equation, 1/Y = A + B/N, was applied to the relationship between cumulative volume Y and cumulative number N from the largest tree in the stand each year. The parameters A and B, which means respectively the reciprocal of an asymptotic value of total stand stem volume and the reciprocal of the maximum stem volume, are related by a power function. The power functional relationship between A and B derived a linear relationship of B-points ( $N_{B}$, $V_{B}$; $N_{B}$ = B/A, $Y_{B}$ = 1/2A) of each Y-N curve on log-log coordinates. The gradient of B-point line was so steep that the Y-N curve moved parallel upward year by year. The time trajectory of mean stem volume (W) and density ($\rho$) provided evidence in favor of the 3/2 power law of self-thinning, because the gradient of W - $\rho$ trajectory on log-log coordinates approximated to -3/2 at the final stage of stand development. On the basis of the results of Y-N curves and W - $\rho$ trajectory, the time trajectory of maximum stem volume $W_{max obs}$ and $\rho$ was derived theoretically. The gradient of $W_{max obs}$ - $\rho$ trajectory on log-log coordinates is calculated to be -0.6105 at the final stage. The gradient of $W_{max obs}$ - $\rho$ trajectory was steeper than that of W - $\rho$ trajectory at the early stage, while the former is gentler than the latter at the later stage.stage.e.age.e.

• 한국생활과학회지
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• 제10권1호
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• pp.127-139
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• 2001

The purpose of this study was to find out the relationships among the elderly's self-esteem and life-adjustment according to decision-making power in their family. Interview survey was conducted and were selected. 296 over age 60 who lived in Jeonju. Frequencies, Percentiles, Pearson's correlation, t-test, ANOVA and Duncan's method were utilized for data analysis. The findings of this study were as follows ; 1) Decision-making power of the elderly in family had significant differences according to sex, coresiding with married children, and the sum of monthly personal expenses. 2) Elderly's self-esteem had significant differences according to sex, the present job, the situation of a spouse, and the sum of the monthly personal expenses. 3) Elderly's life-adjustment had significant difference according to residence type, the present job, the situation of a spouse, religion, education, and the sum of the monthly personal expenses. 4) Clothing and food in family had significant differences according to sex. 5) The elderly men's self-esteem had positive relationship with housing, sons and daughters guidance, grandchildren care, and family event and etc. But the elderly women's self-esteem had positive relationship with food, grandchildren care, and family event and etc. 6) The elderly men's life-adjustment had positive relationship with clothing, food, housing, family economy, sons and daughters guidance, grandchildren care, and family event and etc. But the elderly women's life-adjustment had positive relationship with food, housing, sons and daughters guidance, grandchildren care, and family event and etc.

• 한국지반공학회논문집
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• 제34권9호
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• pp.43-49
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• 2018

감쇠식을 이용한 지진재해평가는 다양한 사회기반시설을 대상으로 한 프로젝트에 널리 수행된다. 이에 따라, 다양한 지반 조건에서의 최대지반가속도 예측을 위한 수많은 감쇠식과 관련 연구들이 수십 년에 걸쳐 이루어졌다. 하지만 기존에 제시된 대부분의 감쇠식들은 일반적으로 토층 상부 30m에 대한 평균 전단파 속도를 지반 분류의 기준으로 적용하여 다양한 지반 조건에서의 지진 규모나 최대지반가속도를 예측할 수 있도록 제시되어 터널이나 원자력 발전소와 같이 기반암을 기초로 하여 건설되는 특수한 유형의 사회기반시설물에 적용하기에는 불확실성을 지니고 있었다. 본 연구에서는 일본에서 측정된 데이터를 기반으로 암반 조건에서의 최대지반가속도 예측이 가능한 개선된 상관관계를 제시하였으며, 산출된 결과를 기존에 제시된 감쇠식을 통해 계산된 결과와 비교하였다. 분석결과, 기존에 제시된 감쇠식들을 통해 최대지반가속도를 예측할 경우, 200km 미만의 거리 내에 위치한 암반지역에서의 최대지반가속도를 상대적으로 과소 예측 하는 것으로 나타났다.

• 의정연구
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• 제15권1호
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• pp.5-38
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• 2009

이 연구는 민주화 이후 국회-대통령-정당관계를 역사적으로 살펴봄으로써 이를 상생적인 관계로 이끌어가기 위한 조건들에 대하여 고찰하고자 하였다. 연구자는 정당 내부의 권력집중도와 정당기율의 정도가 국회-대통령관계의 상생성에 결정적 영향을 미친다고 보고 이를 분석의 중심틀로 적용하였다. 2002년 이전까지 한국 정당은 권력집중형에 강한 기율이 특징이었다. 대통령 정당은 그의 의제실현을 목적으로 한 입법도구였고, 야당은 반대자로만 존재하는 집단적 대립과 교착의 시대였다. 2002-4년이후 정당정치에서 권력을 분산시키고 기율을 약화시키는 미국식 원내정당화를 포함하여 다양한 제도 개혁이 이루어졌으나 현재까지는 상생정치가 별로 진전되지 않고 있다. 개혁의 결과는 의원들 개인보다는 파벌의 중요도를 증진하였다. 그런데 파벌정치가 (잠재적)대권후보를 중심으로 강하게 응집함으로써 국회는 여전히 정당간의 당론들만이 격돌하는 입법전쟁터로 존재할 뿐이다. 분석을 토대로 연구자는 상생정치 발전을 위해서 현재 정당 및 하위 파벌들의 집단적 행태를 더욱 해체하는 방향으로의 제도 개선을 제안하였다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 춘계학술대회 초록집
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• pp.136.2-136.2
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• 2011

In this work, we analyzed correlations between life-cycle greenhouse gas (GHG) emissions and life-cycle cost of energy resources. Energy resources studied in this paper include coal, natural gas, nuclear power, hydropower, geothermal energy, wind power, solar thermal energy, and solar photovoltaic energy, and all of them are used to generate electricity. We calculated the mean values, ranges of maximum minus minimum values, and ranges of 90% confidence interval of life-cycle GHG emissions and life-cycle cost of each energy resource. Based on the values, we plotted them in two dimensional graphs to analyze a relationship and characteristics between GHG emissions and cost. Besides, to analyze the technical maturity, the GHG emissions and the range of minimum and maximum values were compared to each other. For the electric generation, energy resources are largely inverse proportional to the GHG emission and the corresponding cost.

• 복식문화연구
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• 제18권3호
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• pp.588-598
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• 2010

Purposes of this research were to examine characteristics of contractors and the relationship between contractors and wholesalers of apparel products. Influence of such variables on wholesalers' satisfaction was also assessed. Location, reputation and service were factors of contractor characteristics. Dependence, cooperation and power were three factors that were considered for contractor-wholesaler relationship variable. Survey data from 109 wholesalers located in Dongdaemun Fashion Town in Korea was used for analysis. Empirical results confirmed the importance of service factor of contractor characteristics. Service and location of the contractor had positive influence on cooperation. Location had negative influence on power. Reputation had positive direct influence on wholesaler satisfaction. Cooperation between contractors and wholesalers had significant influence on wholesaler satisfaction.