• Journal of the Korean Home Economics Association
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• v.46 no.7
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• pp.95-108
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• 2008

The major purpose of this study was to investigate the effect of intergenerational transmission of self-differentiation on psychological adjustment of college students. Specifically, the present study endeavored to test the causal model focusing on the effect of the father's and the mother's self-differentiation on college student's psychological adjustment through the student's self-differentiation. The data were collected from 254 male and 293 female college students and their parents by using self-administered questionnaire method. The casual model was tested through structural equation model by using AMOS 7.0 program. The results showed that mother's and father's self-differentiation had direct and indirect effect on student's psychological adjustment. The results showed that both mother's and father's self-differentiation had direct effect on son's self-differentiation level, which directly influenced his psychological adjustment. The test of structural equation model also revealed that daughter's self-differentiation level was positively influenced only by mother's self-differentiation, while father's self-differentiation did not influenced female student's self-differentiation. Both male and female student's psychological adjustment was directly influenced by his or her self-differentiation level.

• The Korean Journal of Financial Management
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• v.14 no.3
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• pp.113-135
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• 1997

본 논문의 목적은 미국 손해보험회사간의 합병을 대상으로 하여 합병전과 후 기업의 X-효율성을 실증분석과 모의분석 방법을 이용해서 검증하고 합병의 잠재적인 X-효율성 효과를 분석하고자 하였다. X-효율성의 증진정도를 파악하기 위해서 횡단면적인 비용함수를 먼저 추정하였는데 비용함수 추정시 생산물이 제로(0)인 경우를 포함하기 위하여 혼용초월 로그비용함수(hybrid translog cost function)를 사용하였다. 그리고 Berger(1992)의 비분포방법(distribution free approach)를 사용하여 기업의 합병전,후 X-효율성을 추정하였다. 1986년부터 1990년 사이에 수평합병한 미국 손보사를 대상으로 피합병기업(merged firms)과 합병기업(merging firms)간의 X-효율성 차이를 검증하였으나 합병전 합병기업이 더 효율적이라는 통계적 증거는 없었다. 두 번째로 합병기업은 합병후 효율성이 증진하였느냐는 가설도 검증하였으나 이 가설을 지지할 만한 통계적 증거는 미약하였다. 가상합병을 통한 모의분석에서는 합병후 상당한 X-효율성 증진이 있을 것이라는 통계적으로 유의한 결과를 얻었으나 합병후 규모효율성의 중진에 대해서는 통계적 유의성이 없었다. 이는 합병의 최대 효익이 규모효율성 증대가 아닌 X-효율성 증대라는 Shaffer(1993)나 Berger and Humphrey(1993)의 연구결과와 일치한다. 실증분석 결과와 모의분석 결과를 비교하면 전자에서는 합병후 X-효율성의 증가효과가 거의 없었으나 후자에서는 합병후 상당한 X-효율성 증가가 있을 것으로 나타났다. 이는 실제 미국 손보사의 합병에서 과도한 합병프리미엄 지급, 규제에 의한 중복비용 둥으로 단기적으로 볼 때 합병사가 부담하는 합병비용이 합병에 의한 효익보다 컸을 것이라는 것을 시사한다.

• The Korean Journal of Pesticide Science
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• v.2 no.2
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• pp.68-74
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• 1998

벼멸구의 카보후란에 대한 저항성 기작을 구명하기 위해 실내에서 카보후란으로 30세대 도태하여 얻은 저항성계통($LD_{50};\;20.3{\mu}g/g$)과 약제를 12년 동안 처리하지 않은 벼멸구 감수성 계통($LD_{50};\;0.3{\mu}g/g$)을 완충용액과 마쇄하여, 105,000g에서 2시간 원심분리하여 얻은 상등액(에스테라제층)과 침전물(P450-산화효소층)을 효소액으로 하여 $^{14}C$-카보후란을 반응시켜 계통 간 대사물 량의 차이를 조사한 바 저해제(piperonyl butoxide; 산화효소저해제, diethylmalate; 글루타치온 전이효소 저해제, iprobenfos; 에스테라제 저해제)와 보조인자 (NADPH; P-450 산화효소, 글루타치온; 글루타치온전이효소)에 상관없이 카보후란의 대사물과 그 양이 계통간 차이가 없었다. 이상의 결과로부터 저항성 벼멸구에서 일반적으로 곤충에서 생화학적 저항성 기구로 잘 알려진 가수 분해 효소의 일종인 에스테라제와 p-450 산화효소, 글루타치온 전이효소의 활성 증가가 저항성 발달에 관여하지 않음을 알 수 있었다.

• The KIPS Transactions:PartD
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• v.18D no.6
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• pp.443-450
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• 2011

Model-based Component development methodologies consider the whole system as an component and develop physical components through recursive decomposition and refinements of components in a top-down manner. We developed a model translator that can be used to formally verify interaction consistency among components, especially the interaction behavior between before- and after- refinements of components. This translator can be used to identify potential problems in the refinement process so that problems can be addressed from the early stage of development. This paper introduces our translation approach and the organization of the translator. The translator has been applied to two case studies to show its usefulness.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.8 no.3
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• pp.1-10
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• 2009

Bus delay time is occurred as the result of traffic condition and important factor to predict bus arrival time. In this paper, transition probability matrixes between bus stops are made by using Markov Chain and it is predicted bus delay time with them. As the results of study, it is confirmed a possibility of adapting the assumption which it has same bus transition probability between stops through paired-samples T-test and overcame the limitation of exiting studies in case there is no scheduled bus arrival time for each stops with using bus interval time. Therefore it will be possible to predict bus arrival time with Markov Chain.

• Proceedings of the KIEE Conference
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• 2006.10a
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• pp.217-219
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• 2006

본 논문은 초고압용 XLPE 케이블의 절연/단도전의 계면특성 향상을 위해 계면활성제 부가를 통한 절연파괴전압 향상에 관한 것으로, 계면구조의 변화와 이에 따른 절연파괴전압의 상관성을 밝히고자 하였다. 이를 위해, 계면확성제의 함량에 따른 절연/반도전 계면에서의 결정 미세구조(라멜라 밀도와 분자배향)를 스침각 X-ray와 TEM분석을 통해 밝히고, 이를 절연파괴 특성과의 상관성을 밝혔다. 연구결과, 사용되는 기저고분자와 첨가제 간의 정합성과 최적의 첨가제 함량이 절연재료의 파괴강도에 큰 영향이 있음을 알 수 있었다. 즉, 과도한 첨가제의 부가로 인하여 계면으로 이동한 계면활성제 간에 인력으로 뭉치게 되고(aggregation), 결국 국부적인 도메인을 형성하여 절연파괴 개시부로 작용할 수 있게 된다. 이를 스침각 X-ray (Gl-SAXS)를 통하여 라멜라 밀도 및 배향을 정량화 할 수 있으며, 이는 XLPE 전력케이블의 반도전 재료의 처방 및 계면특성 정량화 기법으로 유효하게 사용될 수 있을 것이다.

• Annual Conference of KIPS
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• 2020.05a
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• pp.32-35
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• 2020

본 논문은 실시간 데이터 분석을 위한 컨테이너 가상화 기술 사용에 대한 효용성을 알아보기 위해 HDP 와 MapR 배포판에 포함된 Spark 를 도커라이징 전과 후 환경에 설치 후 HiBench 벤치마크 프로그램을 이용해 성능을 측정하였다. 그리고 성능 측정치에 대해 대응표본 t 검정을 이용하여 도커라이징 전과 후의 성능 차이가 있는지를 통계적으로 분석하였다. 분석 결과, HDP 는 도커라이징 전과 후에 대한 성능 차이가 있었지만 MapR 은 성능 차이가 없었다.

• Management & Information Systems Review
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• v.39 no.2
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• pp.17-37
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• 2020

The purpose of this study is to investigate the global spillover effects through the existence of linear and nonlinear causal relationships between the US, European and BRIC financial markets after the period from the introduction of the Euro, the financial crisis and the subsequent EU debt crisis in 2007~2010. Although the global spillover effects of the financial crisis are well described, the nature of the volatility effects and the spread mechanisms between the US, Europe and BRIC stock markets have not been systematically examined. A stepwise filtering methodology was introduced to investigate the dynamic linear and nonlinear causality, which included a vector autoregressive regression model and a multivariate GARCH model. The sample in this paper includes the post-Euro period, and also includes the financial crisis and the Eurozone financial and sovereign crisis. The empirical results can have many implications for the efficiency of the BRIC stock market. These results not only affect the predictability of this market, but can also be useful in future research to quantify the process of financial integration in the market. The interdependence between the United States, Europe and the BRIC can reveal significant implications for financial market regulation, hedging and trading strategies. And the findings show that the BRIC has been integrated internationally since the sub-prime and financial crisis erupted in the United States, and the spillover effects have become more specific and remarkable. Furthermore, there is no consistent evidence supporting the decoupling phenomenon. Some nonlinear causality persists even after filtering during the investigation period. Although the tail distribution dependence and higher moments may be significant factors for the remaining interdependencies, this can be largely explained by the simple volatility spillover effects in nonlinear causality.

• Therapeutic Science for Rehabilitation
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• v.1 no.1
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• pp.57-70
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• 2012

Objective : This study was to evaluate the effects of a Neurofeedback(NFB) and Computer Assisted Cognitive Rehabilitation(CACR) training to improve on cognition and affected arm function in stroke subjects. Methods : Participants were randomly allocated to three groups: NFB(n=14), CACR(n=14) and control(n=16). All groups received occupational therapy and physical therapy for 5 session 30 minutes per week during 6 weeks. Also NFB and CACR group practiced additional NeuroComp training and RehaCom training for 30 sessions 30 minutes during 6 weeks. Results were evaluated by cognition, affected arm function. Results : There were significantly increased by CACR training that outcomes of MMSE-K(p<.05). And there weren't significantly difference by NFB and CACR training that outcomes of the affected arm function. And a difference between three groups wasn't found. Conclusion : The NFB and CACR training improves cognitive function. These results suggest that NFB and CACR training is feasible and suitable for individuals with stroke.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.59 no.4
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• pp.413-426
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• 2014

This study was conducted to investigate changes of physicochemical properties and fatty acid compositions of rough rice stored at different storage temperatures and periods. So we analyzed texture, alkali digestion value (ADV), toyo glossiness value, pasting properties, fat acidity and fatty acid compositions of five rice varieties every 4 month on the condition of which rough rice had been stored at different temperatures (ambient and low temperature condition at $15^{\circ}C$) for 2 years. Hardness of cooked rice was increased by storage periods and cohesiveness of cooked rice was not considerably different among varieties according to storage temperatures and periods. ADV was significantly different among varieties and storage periods but not different with storage temperatures. Toyo glossiness value of cooked rice was continuously decreased from 4 months after storage regardless to storage temperature. The pasting properties were considerably affected by storage temperatures and periods of rough rice. Increase in peak viscosity, final viscosity and breakdown was observed but setback was decreased by storage periods. Fat acidity of brown rice was much higher than that of milled rice during storage of rough rice and tend to increase by storage period. Oleic acid among fatty acids of brown rice except Sindongin and Hitomebore tended to be decreased by storage periods and linoleic acid among fatty acids of brown rice of Hopum was decreased by storage periods. The contents of linoleinic acid and stearic acid among fatty acids of milled rice were comparatively decreased from 4 months after storage, whereas the content of palmitic acid tended to be increased by storage periods.