Systematic Dynamic Effects in Multiple Impact Pairs and Distributed Factors

In this paper in general the dynamic effects are considered and described, caused by different stand-ing waves in discrete and distributed systems with impacts and other strongly positional non-linear fac-tors, introduction of which in the models of me-chanical objects is dictated by the necessity to con-sider processes, accompanied with impacts of me-chanical subsystems of different nature.     

一类高阶中立型时滞微分方程的振动性

用不同于已有文献的方法研究了一类高阶中立型微分方程,本文不需要条件f∞t0Q(s)ds=∞,获得了这类方程振动性的几个新的结果.     

Partisan Patriotism in the American Presidency: American Exceptionalism,Issue Ownership,and the Age of Trump

This study employs issue ownership theory to examine the partisan dynamics surrounding the idea of American exceptionalism in presidential discourse. We conducted a content analysis of invocations of American exceptionalism in all major U.S. presidential addresses—domestic and foreign—from the end of World War II through Trump’s 1st year in office. We find that even though Republicans have traditionally claimed ownership of American exceptionalism, patterns in presidential discourse tell a very different story. Specifically, our results show (a) in domestic contexts, Republican and Democratic presidents were very similar in their invocations of American exceptionalism during the Cold War but that Democrats have held a substantial advantage over Republicans throughout the post–Cold War era, including on issue areas that Republicans are perceived to “own” (e.g. national security); (b) in foreign contexts, Democrats have been much more outspoken in their embrace of American exceptionalism throughout both the Cold War and post–Cold War; and (c) President Trump has diverged significantly, both in substance and frequency, from his Democratic and Republican predecessors in his invocation of American exceptionalism. We reflect on the implications of these findings on our broader understanding of issue—and trait—ownership, presidential discourse, and American exceptionalism in American politics.     

��It depends on what science teacher you got��: urban science self-efficacy from teacher and student voices

In the United States today, urban schools serve the majority of high-poverty and high minority populations including large numbers of Hispanic students. While many Hispanic students perform below grade level in middle school science, the science teaching community as a whole is lacking elements of diversity as teachers struggle to meet the needs of all learners. Researchers have recognized that science teacher effectiveness, one consequence of self-efficacy among teachers, is associated with future science achievement and science-related careers of their students. This qualitative study explores how three science teachers’ effectiveness in the classroom impacts students’ science self-efficacy beliefs at one urban middle school. Hispanic students were the focus of this investigation due to demographics and history of underperformance within this district. Teachers’ perspectives, as well as outside observer evaluations of instructional strategies and classroom climates were triangulated to explore dynamics that influence students’ interests and motivation to learn science using a framework to link teachers’ sense of efficacy (focusing on student outcomes). Findings suggest the impact teacher effectiveness can have on student outcomes, including strengthened student science self-efficacy and increased science achievement. Building awareness and support in teachers’ sense of efficacy, as well as developing respectful and supportive relationships between educator/facilitator and pupil during the transition to middle school may construct permanence and accomplishment for all in science.     

A Comprehensive Analysis of High School Genetics Standards: Are States Keeping Pace with Modern Genetics?

Science education in the United States will increasingly be driven by testing and accountability requirements, such as those mandated by the No Child Left Behind Act, which rely heavily on learning outcomes, or "standards," that are currently developed on a state-by-state basis. Those standards, in turn, drive curriculum and instruction. Given the importance of standards to teaching and learning, we investigated the quality of life sciences/biology standards with respect to genetics for all 50 states and the District of Columbia, using core concepts developed by the American Society of Human Genetics as normative benchmarks. Our results indicate that the states' genetics standards, in general, are poor, with more than 85% of the states receiving overall scores of Inadequate. In particular, the standards in virtually every state have failed to keep pace with changes in the discipline as it has become genomic in scope, omitting concepts related to genetic complexity, the importance of environment to phenotypic variation, differential gene expression, and the differences between inherited and somatic genetic disease. Clearer, more comprehensive genetics standards are likely to benefit genetics instruction and learning, help prepare future genetics researchers, and contribute to the genetic literacy of the U.S. citizenry.     

倾斜金标试纸图像的线宽测量方法

基于显微图像的金标试纸条测试线线宽参数的测量方法具备操作方便、测量速度快、分辨率高等优点,然而图像采集系统采集到的金标试纸条的显微图像不可避免地会发生倾斜,这为后续的图像分割和参数测量带来了困难,因此需要对倾斜的金标试纸条显微图像进行校正。根据霍夫变换法和最小二乘法在直线检测中的优点和适用条件,拟采用一种结合霍夫变换法和最小二乘法的直线检测算法来求得金标试纸条图像的边缘线和边缘线的倾斜角度参数,并采用图像旋转变换算法实现对原图像的倾斜校正。实验表明,所采用的倾斜校正算法具备计算量小、占用内存小、校正精度高的优点,通过倾斜校正可以准确测量倾斜金标试纸图像的线宽参数。     

文化创意产业视域下的上海艺术设计高端人才培养

基于调查数据,探讨了2012、2013年上海文化创意产业结构、发展规模以及该类技能人才占有情况,分析了上海本专科院校艺术设计类技能人才培养建设现状,提出了从培养单纯掌握专业技法的工具型人才向培养熟悉完整艺术设计流程的综合职业人才转变的人才培养思路和以高端人才为导向的多元化教育模式与个性化人才培养方案。     

Four Cases of Transfer Leading to Accomplishment

Throughout their lives, individuals accumulate and apply lessons learned from instruction and experience. It is unclear how they transfer these lessons to become accomplished in their fields. In this exploratory study, we develop grounded hypotheses about the relationship of transfer to accomplishment. Selected individuals told stories about what they learned that influenced their major accomplishments, their sources, and timing. Findings indicate that individuality is magnified on the road to accomplishment, although shared lessons were evident. Attitudes and values, adopted and applied, seemed to play a special role in the passage from transfer to accomplishment.     

小学语文教科书中的爱国主义语篇的概念意义构建研究

人教版语文第一册中有四篇课文是以传递爱国主义价值观为宗旨的。选取其中《我多想去看看》作为研究对象,运用符际互补理论框架,研究如何通过文字和图像符号系统的相互作用和相互配合,形成连贯的语篇,分析结果表明,文字图像之间的符际关系着重在"国旗"、"地点"、"升旗仪式"以及"观礼"等方面;在小学语文教材中可以通过文字和图像符号系统的互补形成连贯的多模态语篇并传导主流价值观。