Bringing Engineering Design into High School Science Classrooms: The Heating/Cooling Unit

Infusing engineering design projects in K-12 settings can promote interest and attract a wide range of students to engineering careers. However, the current climate of high-stakes testing and accountability to standards leaves little room to incorporate engineering design into K-12 classrooms. We argue that design-based learning, the combination of scientific inquiry and engineering design, is an approach that can be used to meet both K-12 educators’ and engineering advocates’ goals. This paper describes an 8-week high school curriculum unit, the Heating/Cooling System, in which engineering design is used to teach students central and difficult chemistry concepts such as atomic interactions, reactions, and energy changes in reactions. The goals of the paper are to (1) describe this successful design-based unit, (2) provide guidelines for incorporating design-based learning into other science topics, and (3) provide some evidence of its value for teaching difficult chemistry concepts and increasing interest in engineering careers.     

求自然数方幂和的简单方法

讨论了利用二项式公式求自然数的方幂和的简单、实用方法。     

自然数幂和公式的简捷方法

利用高阶导数,简捷地推导出了∑n-1 k=0rkkm的两种形式的求和公式,并证明了一个Bernoulli数的确切表达式,得到了一个新的Bernoulli数递推公式。     

自然数方幂和公式的系数三角形

与用扬辉三角形可求出二项式任意次幂的展开式相似,自然数方幂和公式的系数三角形可求出自然数方幂和任意次幂的求和公式,且这种方法的计算速度超过以往的任何一种计算方法。     

自然数幂和公式与三角公式的几何证明——数学史与数学教学关系个案研究

作为数学教育改革的一种尝试,文章将数学发展的历史与数学教育相结合给出了自然数幂和公式与三角公式的直观证明。由此探讨了数学史与数学教育的关系（ＨＰＭ）,认为数学史上许多思想方法十分精彩,富有启发性,若能将它们渗透到数学教学中,对数学教育改革将具有极其重要的意义。     

英语数字夸张初探

数字不仅具有计数意义,而且具有很强的修辞功能,文章具体分析了英语中应用数字表示夸张的三种类型及其制约因素和语用分析.     

The Cognitive Predictors of Computational Skill with Whole versus Rational Numbers: An Exploratory Study

The purpose of the present study was to explore the 3rd-grade cognitive predictors of 5th-grade computational skill with rational numbers and how those are similar to and different from the cognitive predictors of whole-number computational skill. Students (n = 688) were assessed on incoming whole-number calculation skill, language, nonverbal reasoning, concept formation, processing speed, and working memory in the fall of 3rd grade. Students were followed longitudinally and assessed on calculation skill with whole numbers and with rational numbers in the spring of 5th grade. The unique predictors of skill with whole-number computation were incoming whole-number calculation skill, nonverbal reasoning, concept formation, and working memory (numerical executive control). In addition to these cognitive abilities, language emerged as a unique predictor of rational-number computational skill.     

日语广告中的数词及其语用修辞效果分析

广告是广告商与消费者之间的一种特殊的语言交际形式，它不仅具有促进商品流通的经济功能，而 且具有较高的语言审美价值。本文从增强语言的可信度、引发人们的形象思维等方面探讨了数词在日语广告句中 的语用修辞效果。     

数形结合问题初探

数形结合思想方法是研究数学问题的重要方法,有些数量关系,借助几何图形的直观描述,可以使许多抽象的概念和复杂的关系形象化、简单化,而几何的一些性质,借助于代数的精确刻画得以严谨。数形有机的结合,可以达到简捷、明了的效果。     

Pell数平方倒数的无限和

In this paper,we consider infinite sums derived from the reciprocals of the square of the Pell numbers.Then applying the floor function to the reciprocals of this sums,we obtain a new and interesting identity involving the Pell numbers.     

论自然人破产制度建立之下侵权之债的破产免责制度构建

当前学界关于建立自然人破产制度的呼声越来越高,自然人破产制度的建立已经成为大势所趋。在关于自然人破产制度的具体设计中,侵权之债的破产免责制度仍需要进一步研究。在我国,对于自然人破产中的侵权之债不能当然免责,应采取许可免责;其次,应对侵权之债进行分类,规定哪些可以免责,哪些不可以免责;最后,对于可以免责的侵权之债,应规定为自然之债,仅仅失去强制执行力,而不是必然消灭。     

Irrational Numbers: The Gap between Formal and Intuitive Knowledge

This report focuses on prospective secondary mathematics teachers’ understanding of irrational numbers. Various dimensions of participants’ knowledge regarding the relation between the two sets, rational and irrational, are examined. Three issues are addressed: richness and density of numbers, the fitting of rational and irrational numbers on the real number line, and operations amongst the elements of the two sets. The results indicate that there are inconsistencies between participants’ intuitions and their formal and algorithmic knowledge. Explanations used by the vast majority of participants relied primarily on considering the infinite non-repeating decimal representations of irrationals, which provided a limited access to issues mentioned above.     

The purposes and processes of master's thesis supervision: a comparison of Chinese and Dutch supervisors

The number of international Chinese students enrolled in research programmes in Western universities is growing. To provide effective research supervision to these students, it is helpful to understand the similarities and differences in the supervision process between the host country and their home country. We explored which learning outcomes supervisors of master's theses aim for in two cultures, China and the Netherlands, and how they help their students to achieve these learning outcomes. Semi-structured interviews with 10 Chinese and 10 Dutch supervisors revealed, besides a strong resemblance, some clear differences between the two groups. For example, the Chinese supervisors aim to prepare their students for future jobs and use explicit assessment and regulation to monitor student progress, while the Dutch supervisors aim to enhance student well-being and use implicit regulation, emotional support and frequent posing of questions to facilitate student learning. Implications for cross-cultural and international education are provided.     

The digital history and pedagogy project: Creating an interpretative/pedagogical historical website

The Digital History and Pedagogy Project (DHPP) is an interpretive/pedagogical collection of Web-based historical resources designed for use in inquiry-based learning in high school and university classrooms. It has been created by faculty and graduate students at a large urban college of education. This paper provides a rationale for the project rooted in current literature; presents a theoretical framework for this and other similar projects; and describes five current digital historical resources (DHRs) within the context of our framework.     

A Model for Expanding Active Learning Regionally: The Greater Upstate New York Inquiry-Based Learning Consortium

What began as a small group of professors gathering to discuss implementation of Inquiry-Based Learning (IBL) in our classes has developed into a strong regional community of practice. Through a generous grant and a lot of hard work, we created the Greater Upstate New York IBL consortium with a mission to create, grow, and maintain a community of instructors across the region. We describe how the consortium formed organically and the way that it operates. We provide suggestions for creating your own regional community of practice for supporting the adoption and enhancement of active learning techniques.     

有关广义第二类Stirling数S~(λ，μ)(η，κ)的研究

本文讨论了由序列{λ,λ+μ,λ+2μ…,λ+ημ…}产生的第二类广义Stirling数S~(λ,μ)(η,κ),通过对其相关性质的深入研究,我们得到了三个重要的定理。     

朝鲜语自然语言处理研究现状分析

国内朝鲜语自然语言处理的研究起步较晚,基础研究相对薄弱,在介绍自然语言处理发展历程的基础上,重点对朝鲜语自然语言处理的研究现状进行了分析,并对其未来的发展趋势进行总结,希望为今后朝鲜语自然语言处理的发展提供一定的参考。     

Learning science with an interactive simulator: negotiating the practice-theory barrier

This article investigates how interactive representations can be used to enhance conceptual learning. It is a naturalistic study of 14 students in four groups aged 16–17 years working with an interactive simulator. The article is based on qualitative data to enable analyses of the students’ processes of conceptual learning as interactive sense-making, as discussions, verbalisation and use. The activities of the learners are studied in detail from a socio-constructive perspective with regard to how they relate previous knowledge and experiences to theory, investigating the progress of conceptual learning inspired by the notion of a coordination class (diSessa, A. A., &; Sherin, B. L. [1998]. What changes in conceptual change? International Journal of Science Education, 20(10), 1155–1191. doi:10.1080/0950069980201002). This process brings design issues related to conceptual learning to the fore. The study points towards a revised inquiry approach in which a digital representation can be used to negotiate a meeting point between theory, previous experience and knowledge, and be instrumental in conceptual sense-making.     

Rethinking Natural Environment Practice: Implications from Examining Various Interpretations and Approaches

Early intervention professionals have implemented natural environment practices for over a decade, despite the continued debate on how to interpret and implement this practice. This article reviews several theoretical frameworks for understanding natural environment practice, and also summarizes different approaches for implementation. The authors present a model for rethinking and redefining natural environment practice in the context of recent approaches.     

大数法则视野下的习惯法地位

大数法则表征群体内大多数成员共有的行为,也是支配群体行为与维持群体稳定性的规范。很多习惯法的形成源于大数法则,它们对群体行为的调整也要借助大数法则的特性。由于大数法则与人权紧密联系,是国家法制定的重要基础,并且它有助于法官在个案中作出理性裁决,因此,从大数法则的视野出发,习惯法应得到相应地尊崇。但同时,大数法则的内容并不必然与人权完全契合,法官在个案中也未必能确证习惯法的大数法则基础,依托于不同大数法则的习惯法之间会发生抵触,这导致大数法则视野下的习惯法存在适用界限。