• 가정과삶의질연구
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• 제31권3호
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• pp.125-140
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• 2013

In the study of married couples, there has been a great lack of analysis of the factors affecting the marital satisfaction of spouses until now. In this study, the subjects were couples living in Seoul or Gyeonggi Province. The data collection period was November 20 to December 20, 2009, and data ond 184 couples were collected and used for the analysis. The SPSS 17.0 program was used for the analysis. The main findings of this study are as follows: First, the husbands' marital satisfaction was higher than that of the wives. And the variables of spousal support, alternative comparison level and marital dissolution disability were also found to be statistically significant according to gender. Second, it was confirmed that the self-variables had a greater effect than partner variables on couples' marital satisfaction. Third, the influential factors of the marital satisfaction of husbands and wives depended on the individual resource variables (self-esteem, health of origin of family, parenting efficacy), the couple relationship variables (spousal support, spousal similarity, recovery attempts), and the level of marital alternatives.

• 한국지하수토양환경학회지:지하수토양환경
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• 제24권5호
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• pp.31-41
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• 2019

In 2013, the Ministry of Environment in South Korea promulgated a new regulatory bulletin that contained revised enforcement ordinance on soil management protocols. The bulletin recommends the use of Universal Soil Loss Equation (USLE) for the soil erosion estimation, but USLE has limited applicability in prediction of soil erosion because it does not allow direct estimation of actual mass of soil erosion. Therefore, there is a great need of revising the protocol to allow direct comparison between the measured and estimated values of soil erosion. The Korean Soil Loss Equation (KORSLE) was developed recently and used to estimate soil loss in two fields as an alternative to existing USLE model. KORSLE was applied to estimate monthly rainfall erosivity indices as well as temporal variation in potential soil loss. The estimated potential soil loss by KORSLE was adjusted with correction factor for direct comparison with measured soil erosion. The result was reasonable since Nash-Stucliff efficiency were 0.8020 in calibration and 0.5089 in validation. The results suggest that KORSLE is an appropriate model as an alternative to USLE to predict soil erosion at field scale.

• 한국도서관정보학회지
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• 제36권1호
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• pp.47-69
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• 2005

구전설화에 바탕을 두고 있는 전래동화는 다양한 이본이 존재하는데, 어린이들을 위해 어떤 책을 선택하는 것이 좋을지, 즉 어느 책의 본문이 가장 좋을지가 늘 의문이었다. 이 연구는 이 의문을 해결하기 위하여 시도된 것으로 원문서지학의 연구방법으로 문헌을 비평하였다. 널리 알려진 전래동화 <해님과 달님>의 이본 6편을 대상으로 줄거리 파악을 통해 구조를 분석하고 이를 토대로 제목, 배경, 등장인물, 문체, 기능을 비교 분석하였다. 그 결과 6편의 이본 가운데 어효선본의 본문이 비교적 우수하다고 판단되었다. 어효선본에서 조력자인 옥황상제를 하느님으로 바꾸고, 문체를 구어체로 바꾸며, 해와 달이 된 오누이가 서로 바꾸는 마지막 장면을 삭제한다면 이상적인 원문이 될 것이다. 이러한 원문서지학적인 연구가 축적되고, 이러한 역량이 갖추어질 때 비로소 사서가 내용, 즉 컨텐츠에 대해서 발언할 수 있게 될 것이다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2014년도 추계학술대회
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• pp.233-236
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• 2014

본 연구의 목적은 가드너의 다중지능이론을 활용한 개별화수업이 다양한 성향과 개인차를 갖고 있는 대안학교 학생들의 컴퓨터교과의 학업성취도향상과 학습흥미도향상에 미치는 영향을 알아보는 것이다. 본 연구의 목적을 달성하기 위해서 다중지능이론을 적용한 컴퓨터교과 수업프로그램을 화성시에 소재하고 있는 특성화 대안학교 2학년 2개 학급을 연구대상으로 진행하였다. 다중지능이론에 기초한 기존 연구결과를 토대로 수업에 적용 가능한 교수학습 활동 전략을 실시한 1개 학급 20명과 기존의 전통식 교육방식으로 수업을 실시한 1개 학급 19명의 학생을 대상으로 주 2시간씩 10차시 수업을 진행하였다. 자료 분석은 실험집단과 비교집단의 사전 사후 검사의 차이를 독립 t-test를 이용하여 분석하였다. 이에 대한 자료통계 분석결과 다음과 같은 결론을 얻을 수 있었다. 첫째, 다중지능이론을 활용해서 수업을 실시한 실험집단이 전통적 강의식 수업을 실시한 비교 집단에 비해서 학업성취도가 더 높은 것으로 나왔다. 둘째, 다중지능이론을 활용해서 수업을 실시한 실험집단이 전통적 강의식 수업을 실시한 비교집단에 비해서 학습흥미가 더 높은 것으로 나왔다. 셋째, 사회성발달은 실험집단과 비교집단 둘 다 별 차이를 보이지 않았다.

• 한국자동차공학회논문집
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• 제19권4호
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• pp.64-71
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• 2011

Homogeneous charge compression ignition (HCCI) was the best concept able to provide low NOx and PM in diesel engine emissions. This new alternative combustion process was mainly controlled by chemical kinetics in comparison with the conventional combustion in internal combustion engine. In this paper, detailed kinetic reaction mechanisms of diesel surrogate was investigated to understand the diesel HCCI engine combustion. It was tested two existing mechanisms and two new mechanisms for the comparison of experimental result. The best mechanism for diesel surrogate was suggested through this comparison.

• 설비공학논문집
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• 제5권4호
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• pp.306-317
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• 1993

In this study, a performance comparison of scroll compressor for various refrigerants(CFC-12, HCFC-22 and HFC-134a) has been numerically carried out. The thermodynamic properties have been calculated by using the recent experimental equations and the performance has been investigated qualitatively at the same geometric specifications and operating conditions of scroll compressor. The results are as follows; HFC-134a has the highest compression ratio of 5.40. The mass flow rate of HCFC-22, which affects the cooling capacity of refrigerant system, is higher than that of other refrigerants. HFC-134a has the highest adiabatic efficiency in comparison with CFC-12 and HCFC-22.

• 산업경영시스템학회지
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• 제11권17호
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• pp.67-80
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• 1988

This study is concerned with the comparison of two time homogeneous Poisson processes. Traditionally, the methods of testing equality of Poisson processes were based on the binomial distribution or its normal approximations. The sampling plans used in these methods are to observe the processes concurrently over a predetermined time interval, possibly different for each process. However, when the values of the intensities of the processes are small, inverse type sampling plans are more appropriate since there may be cases where only a few or even no events are observed in the predetermined time interval. This study considers 9 inverse type sampling plans for the comparison of two Poisson processes. For each sampling plans considered, critical regions and the design parameters of the sampling plan are determined to guarantee the significance level and the power at some values of the alternative hypothesis. The Problem of comparing of two Weibull processes are also considered.

• 대한기계학회논문집
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• 제17권9호
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• pp.2358-2372
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• 1993

In this study, the computer modeling for prediction of the performance of fin-tube heat exchanger using alternative refrigerant, HFC-134a was developed and the computer program for calculating the various properties of HFC-134a and the existing refrigerant CFC-12 and HCFC-22 was made. The heat exchanger modeling is based on a tube-by-tube approach, which is capable of analysis for the complex coil array. Performance of each tube is analyzed separately by considering the cross-flow heat transfer with external airstream and the appropriate heat and mass transfer relationships. A performance comparison according to the different refrigerants is provided using this developed model. As the result of this study, total heat transfer rate of evaporator and condenser using HFC-134a were found higher than that of using CFC-12 for the same operating conditions. When the mass flow rate of HFC-134a was less than CFC-12 about 18. 16%, the cooling capacities of evaporator were found to be the same.

• 한국지능시스템학회논문지
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• 제12권2호
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• pp.157-163
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• 2002

본 연구의 목적은 배치 특성의 정량화에 의해 배치 대안들을 비교할 수 있는 객관적인 평가 기준을 정림하는 것이다. 장비배치는 모든 구성 요소들의 기능을 최대로 하고 동시에 공간적인 제한 조건을 만족시키도록 여러 가지 장비들의 위치를 결정하는 설계단계이다. 선박의 경우 설계자가 제시하는 몇 가지 배치안 중 한 가지만 선택하게 되는데 이 과정은 숙련된 전문가의 경험, 지식, 판단에 대한 의존도가 매우 높고 또한, 객관적인 평가가 어렵다. 우리는 이러한 서술적인 언어로 된 것을 퍼지 이론을 통해 정량화하여 배치안을 객관적으로 평가할 수 있는 기준을 제시한다.

• Journal of Biosystems Engineering
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• 제31권2호
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• pp.115-120
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• 2006

Our environment is faced with serious problems related to the air pollution from diesel engines in these days. In particular, the exhaust emissions of agricultural diesel engines are recognized main cause which influenced environment strongly. In this study, the potential possibility of biodiesel fuel was investigated as an alternative fuel for a naturally aspirated agricultural D.I. diesel engine. The smoke emission of biodiesel fuel was reduced remarkably in comparison with diesel fuel, that is, it was reduced approximately 50% at 2500 rpm, full load. But, power, torque and brake specific energy consumption didn't have large differences. But, NOx emission of biodiesel fuel was increased compared with commercial diesel fuel. Also, the effects of exhaust gas recirculation (EGR) on the characteristics of NOx emission has been investigated. It was found that simultaneous reduction of smoke and NOx was achieved with biodiesel fuel (20vol-%) and cooled EGR method($5{\sim}15%$) in an agricultural D.I. diesel engine.