一类整群环的K1群的计算

着重讨论整群环的K1群的计算,问题的关键点在于其对应的SK1群的计算,其中,p群的整群环的SK1群的结果是已知的.讨论了计算SK1群的基本理论,并证明了一类特殊的非p群(p1q1阶群)的整群环的SK1群是平凡的.     

The Rise and Fall of a Required Interdisciplinary Course: Lessons Learned

In order to meet the South Dakota Board of Regents requirements for an upper level writing course with global perspective for all graduates, the administration at the University of South Dakota established an interdisciplinary course to be taken by all majors. Two faculty members from different disciplines were assigned to teach each section with support from an English Ph.D. student. The institution built an active learning classroom for 18 teams of 6 students taught simultaneously in each section. However, after only four semesters, the administration canceled the course. In this article, we offer an analysis of this situation and suggest lessons learned, both positive and negative, during the development, implementation, and redesign of this interdisciplinary course.     

Social investigation and economic empowerment: Trade Schools for Girls, 1892–1914

Women workers are at the bottom of the industrial scale. In almost every trade they do the least skilled portion of the work and the wages average not more than 12s a week. They work long hours, partly because their occupation is in workshops or the home rather than in the factories, and their trades are for the most part those in which overtime is allowed; and to this legal overtime is freely added, often . . .without payment. What a mockery to preach self‐help to women so placed! They cannot help themselves . . . Wages in the trades which are filled by women are always tending to fall lower and lower. The women are unorganised, and they will take work at any price. ^{1 1}Karl Pearson, quoted in H. Morten, ‘Technical Education for Girls’, Fortnightly (January 1901), 174.      

Sensitivity to linguistic stress,phonological awareness and early reading ability in preschoolers

Recent research has found that sensitivity to linguistic stress is related to phonological awareness and reading development. This study investigated the roles of two types of linguistic stress sensitivity (lexical and metrical stress) in the phonological awareness and reading development of young children. Forty‐five kindergarten children were tested on a battery of tasks that examined linguistic stress sensitivity and early reading ability. Results indicated that lexical stress, but not metrical stress sensitivity, is significantly related to phonological awareness and early reading ability. However, lexical stress is not able to predict unique variance in early reading ability once phonological awareness is controlled for. The relationships of both lexical and metrical stress sensitivity with phonological awareness and early reading development are discussed.     

基于事件分析法的国家创新政策对高新技术产业的影响分析

选取在深圳中小板上市的高新技术企业为样本,运用事件分析法分析了我国2006年以来创新政策中的税收优惠政策的颁布对公司市场价值的影响。与考察单个事件影响原理不同,此次研究的税收优惠政策为＂间断发生的同类事件＂,故通过对该类事件发生作用的事件窗口内的＂异常波动＂来衡量事件的影响作用。实证研究结果表明：税收优惠政策的颁布给深圳中小板上市的高新技术企业市场价值带来了正向影响。此外,以传统的石化产业和新兴的生物医药产业为例,研究创新政策对不同产业公司的影响差异。结果表明：税收优惠政策的颁布对不同产业的平均超常收益率和累积平均超常收益率影响趋势基本相同,均呈现出增长趋势;但相比而言,对新兴的高新技术产业影响更为显著。     

The Effects of Liberal Arts Experiences on Liberal Arts Outcomes

Despite scholars’ praise of liberal arts education as a model form, very little research has examined the actual impact of liberal arts education on learning outcomes. The elaborate rhetoric and anecdotal support, long used to advance liberal arts education as the premier type of education with value for all, is no longer sufficient. The practices and conditions that lead to outcomes of a liberally educated student remain an empirical black box. Guided by the work of Pascarella et al. [2005, Liberal arts colleges and liberal arts education: New evidence on impacts. ASHE Higher Education Report, 31(3)], this study examined the extent to which an institutional ethos, that values student–student and student–faculty interaction within a supportive environment characterized by high expectations for developing the intellectual arts, manifests in the lived experiences of students and predicts the development of outcomes theoretically associated with the liberal arts. Specifically, we investigated the construct and predictive validity of the liberal arts experience scale relative to liberal arts outcomes. Using data from the first phase of the Wabash National Study of Liberal Arts Education, net of student background characteristics and institution attended, we found liberal arts experiences had a positive effect on four of six liberal arts outcomes, including intercultural effectiveness, inclination to inquire and lifelong learning, well-being, and leadership.

THE SELECTION OF COMMUNICATION CHANNELS BY THE ELDERLY TO OBTAIN INFORMATION

Effective communication is a concern of those involved in programs for the elderly. The primary focus of this study is the influence of audience variables on the selection of communication channels by the elderly to obtain information.

Five county aging‐service programs and four AARP chapter meetings were surveyed. Participants indicated how they usually obtained information about five different topics of special concern to older adults. The communication channels included five media: Television, radio, newspapers, magazines, and brochures/leaflets, and three interpersonal channels: Friends/relatives, professionals, and organizations.

Education, age, income, and living arrangements were related to communication channel selection. Elderly people who did not complete high school were less inclined to select any of the channels. Age was a factor, especially if the individual was over 80 years old. A lower income influenced the selection of two print media (newspapers and magazines), along with two interpersonal sources (relatives/friends and organizations). Individuals living alone were less likely to be reached through newspapers and organizations. Gender did not directly influence source selection.

Television and newspapers were the most preferred channels for information, followed by friends/relatives, brochures/leaflets, and organization. Radio, magazines, and professionals were the least often selected channels.

The most difficult‐to‐reach segment of the sample shared three characteristics: Those with less than a high school education and lower income tended to have a lower information‐seeking orientation, and in some cases being older was a factor.     

A New Approach to Developing Interactive Software Modules Through Graduate Education

Educational technology has attained significant importance as a mechanism for supporting experiential learning of science concepts. However, the growth of this mechanism is limited by the significant time and technical expertise needed to develop such products, particularly in specialized fields of science. We sought to test whether interactive, educational, online software modules can be developed effectively by students as a curriculum component of an advanced science course. We discuss a set of 15 such modules developed by Harvard University graduate students to demonstrate various concepts related to astronomy and physics. Their successful development of these modules demonstrates that online software tools for education and outreach on specialized topics can be produced while simultaneously fulfilling project-based learning objectives. We describe a set of technologies suitable for module development and present in detail four examples of modules developed by the students. We offer recommendations for incorporating educational software development within a graduate curriculum and conclude by discussing the relevance of this novel approach to new online learning environments like edX.