关于后方交会的一些误区

文章分析了在一个角度和一个三角形中进行后方交会时最佳点位的规律,指出某些规程中有关后方交会问题的不足之处.     

Gentrification,Charter Schools,and Enrollment Patterns in Washington,DC: Shared Growth or New Forms of Educational Inequality?

ABSTRACT

Cities in the United States and across the world have experienced gentrification at the same time as school choice policies have become more popular. This research examines the relationship between gentrification and charter schooling, seeking to understand how together they affect demographic composition of schools across Washington, DC. This study uses geographic information systems (GIS) mapping and statistical techniques to show that gentrified neighborhoods are more likely to have charter schools. Additionally, the demographic compositions of charter schools and traditional public schools differ depending on the gentrification classification of the census tract in which the schools are located. While a handful of diverse charter schools exist in gentrified neighborhoods and some diverse public schools exist in traditionally affluent neighborhoods, schools in Washington, DC remain racially and economically isolated overall.     

Biomechanics and visual-motor control: how it has, is, and will be used to reveal the secrets of hitting a cricket ball

Cricket batting is an incredibly complex task which requires the coordination of full-body movements to successfully hit a fast moving ball. Biomechanical studies on batting have helped to shed light on how this intricate skill may be performed, yet the many different techniques exhibited by batters make the systematic examination of batting difficult. This review seeks to critically evaluate the existing literature examining cricket batting, but doing so by exploring the strong but often neglected relationship between biomechanics and visual-motor control. In three separate sections, the paper seeks to address (i) the different theories of motor control which may help to explain how skilled batters can hit a ball, (ii) strategies used by batters to overcome the (at times excessive) temporal constraints, and (iii) an interpretation from a visual-motor perspective of the prevailing biomechanical data on batting.     

母语负迁移对中国学生翻译学习的影响

翻译作为一种双语信息的转换过程,难免会受到母语负迁移的影响。可从词汇和句法两个方面探讨母语负迁移对中国学生翻译学习的影响,并就如何帮助中国学生克服翻译学习中的母语负迁移提出了切实可行的对策,以便更好地促进翻译学习,提高学生的翻译能力。     

核心素养视域下的中小学书法教育的思考

随着教育改革的不断深入,中国学生发展核心素养为各个学科的教学实践提供了更有力的抓手和更细化的要求。作为中小学教育体系的重要组成部分,书法教育的开展也应当以核心素养为指导。通过厘清中小学书法教育对学生发展核心素养,尤其是在人文底蕴、健康生活、责任担当等方面的重大作用,分析现有中小学书法教育中对有效发展核心素养的制约因素,探究实现中小学书法教育促进学生发展的路径与策略。     

Closing the Gaps and Filling the STEM Pipeline: A Multidisciplinary Approach

There is a growing demand for degreed science, technology, engineering and mathematics (STEM) professionals, but the production of degreed STEM students is not keeping pace. Problems exist at every juncture along the pipeline. Too few students choose to major in STEM disciplines. Many of those who do major in STEM drop out or change majors. Females and minorities remain underrepresented in STEM. The success rate of college students who are from low-income background or first-generation students is much lower than that of students who do not face such challenges. Some of those who successfully complete their degree need help in making the transition to the workforce after graduation. A program at Lamar University takes a multidisciplinary approach to addressing these problems. It is designed to recruit, retain and transition undergraduates to careers in STEM, focusing its efforts on five science disciplines and on these “at-risk” students. The program was supported by a 5-year grant from the National Science Foundation and is supported through August 31, 2016 by Lamar University and a grant from ExxonMobil. A formal assessment plan documents the program’s success. The program received an award from the Texas Higher Education Board for its contributions towards Closing the Gaps in Higher Education in Texas. This paper describes the program’s theoretical framework, research questions, methods, evaluation plan, and instruments. It presents an analysis of the results achieved using these methods and implications for improvements to the program resulting from lessons learned.     

浅谈本科毕业论文的写作与指导

从本科生毕业论文的选题、撰写、整理及答辩等环节出发,结合指导基础数学专业本科生毕业论文的实践经历,提出了一些看法与见解.     

Seeing in the Dark: Embodied Cognition in Amateur Astronomy Practice

We add to research on embodied cognition by investigating the observational practices of amateur astronomers. Specifically, we take an interactionist perspective and examine how the body is recruited, moment by moment, as a resource for producing and communicating meaning during field activity. The data corpus is a set of ethnographic video records and field notes on the routines of a community of astronomers, especially small-group interactions during planning, searching for, observing, and confirming sight of a celestial target. Within this space, our analysis highlights how different modalities of embodied action and reasoning (gestures, tool use, gaze, touch, and others) were deployed and coordinated throughout the process of observing a celestial object and how those emerged in the transactions among participants. Our findings rehearse many issues and topics in the contemporary literature (e.g., gesturing for measuring or representationally) but also reveal important, novel forms of embodied action and reasoning in science, technology, engineering, and mathematics practices (e.g., training the eyes in averted vision and inscribing a celestial scene onto one’s hand). More broadly, these findings further affirm the power of interactionist analyses of knowing and learning while also surfacing areas in which expanded theorizing is needed to account for the full set of cognitive phenomena we observed.