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The effect of health care reform: Testing the stability of systematic risk
Sewell, Daniel K.,Song, Joon-Jin The Korean Data and Information Science Society 2010 한국데이터정보과학회지 Vol.21 No.5
As the U.S. Congress has continued to debate over the health care reform pushed by President Obama, there is an ample reason to believe that the systematic risk of the health care industry, especially health care plan providers, is increasing. This study measures and compares the systematic risk of two health care industry indexes and one portfolio of health care plan providers from before and after the introduction of the health care legislation into Congress in September, 2009. The Capital Asset Pricing Model (CAPM) is used to measure the systematic risk, and a dummy variable approach and the Chow test are used to formally compare the systematic risk from before and after the introduction of the legislation.
동기부족 영어 초급 대학생들을 위한 동기의 기대가치 모델 활용 방안
더글라스시웰 ( Douglas Sewell ) 한국외국어대학교 외국어교육연구소 2008 외국어교육연구 Vol.22 No.1
본 연구의 목적은 영어 학습에 있어서 동기가 미흡한 학생들을 대상으로 하여 그들이 생각하는 자신의 학습 능력과 학습의 필요성이 동기 유발에 관여한다는 기대가치 모델의 유효성을 밝히고자 하는 것이다. 특히, 본 연구는 이러한 학생들을 대상으로 이루어질 차후에 심도 있는 연구를 위한 선행 연구의 일환이다. 먼저 기대가치 모델과 한국의 교육 현실을 보기 위하여 한국에서 요구되는 바람직하고 능력 있는 교사상이 논의되었으며, 학생들이 바라는 이러한 교사상이 충족되는 가에 따라 배움에 대한 기대가 성립됨을 제시하였다. 열의가 부족한 대학생들의 낮은 학습 동기는 스스로의 학습능력을 낮게 판단하는 것과 관련될 수 있음을 실험 결과를 통해 제안하였다. 또한 각 수업 활동마다 이 학생들의 자기 학습능력 기대치의 고저와 동기 발생 정도의 증감이 일정한 관계를 유지하여 비례적으로 증감함을 보여 주었다. 마지막으로 본 연구는 한국 대학생들에 있어서 기대가치 모델의 유효성을 제시함과 동시에, 연구의 대상이 된 성향의 학생들을 교수함에 있어서 직면하게 되는 중요한 문제점을 이해하는 하나의 틀을 제공하고 있다. This paper considers the Expectancy-Value Model of Motivation in relation to poorly motivated false beginner Korean college students for the purposes of both showing the model is valid, as well as providing preliminary insights on these students for future research. This paper begins by considering this model with respect to the Korean educational system. In doing so, an overview of the teacher`s role and the expectations inherent in it in the Korean context are discussed. Following this, a link between the fulfillment of these expectations and students` expectancy of learning is suggested. This paper next shows experimental evidence suggesting that poorly motivated false beginner Korean college students` lowered level of motivation can be reasonably explained by them having a lowered expectancy of learning. This paper further shows that within these students, there is a general covariance of expectancy and motivation for different classroom activities. This paper thus provides support for the validity of the Expectancy-Value Model of Motivation within the Korean context, as well as providing a framework for understanding some of the critical issues faced when teaching English to these students.
The effect of health care reform: Testing the stability of systematic risk
Daniel K. Sewell,송준진 한국데이터정보과학회 2010 한국데이터정보과학회지 Vol.21 No.5
As the U.S. Congress has continued to debate over the health care reform pushed by President Obama, there is an ample reason to believe that the systematic risk of the health care industry, especially health care plan providers, is increasing. This study measures and compares the systematic risk of two health care industry indexes and one portfolio of health care plan providers from before and after the introduction of the health care legislation into Congress in September, 2009. The Capital Asset Pricing Model (CAPM) is used to measure the systematic risk, and a dummy variable approach and the Chow test are used to formally compare the systematic risk from before and after the introduction of the legislation.
Lane Samantha R.,Sewell Robert D.E.,Jiang Robert The Korean Fiber Society 2006 Fibers and polymers Vol.7 No.1
It has been reported for several decades that microbes, which naturally contaminate cotton fibres during crop growth and subsequent storage can have an adverse effect on the structural quality of cotton lint. Although several studies have analysed the relationship between numbers of Gram-negative bacteria or bacterial endotoxin and particular physical properties, these studies have been limited to cotton from the United States, and the possible effects of fungal contamination have not been examined in detail. This study quantified the Gram-negative bacteria and fungal cells, as well as measuring concentrations of bacterial endotoxin and fungal glucan, on cotton lint samples from international sources. Spearman's rank correlation coefficients calculated between these results and quality data analysed by an automated testing instrument revealed several significant correlations. Findings included inverse correlations between the biological contamination parameters and fibre elongation, micronaire and reflectance. The possible causes and implications of these findings were also discussed.