Mathematics as a Social Construct: Teaching Mathematics in ContextHayley Barnes and Elsie Venter University of Pretoriahayley.barnes@up.ac.za and elsie.venter@up.ac.zaWhy is teaching in context an important option to consider in the teaching of mathematics? What does it mean to teach mathematics from and in contexts? And what are the possible challenges associated with this practice? The aim of this paper is not to provide a comprehensive answer or solution to these questions. We attempt rather to address these questions specifically with regard to South Africa and the theory of Realistic Mathematics Education. In this article we consider a vignette of a more formal and traditional mathematics lesson and then suggest possible reasons why we need to be teaching more in context. Furthermore we discuss the application of the theory of Realistic Mathematics Education as a potential approach to facilitate teaching in context. Finally we present some challenges associated with this practice.

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英语原文共 19 页， N. Noddings的关怀理论：一种女性的伦理方法和道德教育 摘要：本文旨在探讨Noddings关于关怀伦理的中心思想。Noddings将关怀的核心意义定义为对那些与看护人情感相连的人的关注，她鼓励看护人的行为不按照道德理论和道德原则，而是根据个人的存在决定。她也反对道德价值普遍性概念。 然而，关心本身在道德层面上就不一定是好的。要将关怀行为评估为道德上好的或适度的，照顾者必须在关怀之外有另一个参照框架。因此， 因此，必须采用普遍性的概念来创造并维持一个参考框架，以此来检查照顾行为的价值。我认为，她的理论中的这些不一致源于她拒绝道德价值观的普遍性概念，以及她拒绝将原则和规则作为道德行为的主要指南。 关键词：Nel Noddings，关怀，专注，普遍性，情感，理性 介绍 关

英语原文共 12 页， 346-347（2016）66-77 可在目录列表 ScienceDirect WEAR 期刊主页： www.elsevier.com/locate/wear 承受轴向激励螺栓接合的实验和数值模拟研究 刘建华 a，华江欧阳 b，彭金芳 a，超前张 C，平舆县周 C，利君马 C，朱旻昊 摩擦学研究所牵引动力国家重点实验室，西南交通大学，成都610031，中国 工程，利物浦大学，利物浦L69 3GH，英国的学校 青岛四方机车车辆股份有限公司，青岛266111，中国 articleinfo 文章历史： 收到2 2015年6月 在收到修改后的形式 2015年10月12日 接受16 2015年10月 可在线3 2015年11月 关键词： 螺栓连接 松 磨损机理 润滑 有限元法 抽象 承受轴向激励螺栓连接的动态行为是使用实验和数值的方法的影响。首先，减少夹紧力的量是通过实

英语原文共 7 页， 使用添加剂改善乙醇燃料汽车的冷起动 Nelson Ricardo Silva, Joseacute; Ricardo Sodreacute; 摘要 乙醇已被用作汽油的替代燃料，尤其是在巴西汽车市场。这种燃料的化学性质在预热期间给冷起动和操作带来困难。为了最大限度地减少这个问题，迄今为止，乙醇燃料车辆装备有汽油贮存器，它在发动机起动时将汽油以小百分比注入汽缸。由于汽油系统的额外成本，并且获得的结果不完全令人信服，所以这种解决方案并不被视为最终的解决方案。在这项工作中，MTBE（甲基叔丁基醚）已经作为乙醇添加剂进行了测试，以改善其冷起动特性。结果显示发动机在低至-6摄氏度的温度下立即起动。与纯乙醇相比，乙醇-MTBE混合物的碳氢化合物废气，氮氧化合物和醛的排放水平降低，而一氧化碳的排放水平增加。当车辆使用混合燃�

The Marketing Plan of Real estateWilliam A.CohenReal estate development is support for the people's daily lives-47 socialist market economic system development, make the real estate market has become the main economic activity members, in the face of the changing market. real estate enterprises are to seize the opportunities and meet the challenges, we must adopt modern marketing concepts, master of modern marketing techniques. China's real estate marketing and sales management environment even after 20 years of market concepts nurtured, But in China's real estate integrity, marketing innovation, product innovation,and the management structure with the international community on distance.1.Real estate marketing elementary knowledge1.1 Marketing conceptsThe market marketing translates from an English marketing word. Most early produces to US, in 1960 the American market marketing association (AMA) defined the committee the definition: The market marketing is the product either the servi

Project Cost Control: the Way it WorksIn a recent consulting assignment we realized that there was some lack of understanding of the whole system of project cost control, how it is setup and applied. So we decided to write up a description of how it works. Project cost control is not that difficult to follow in theory.First you establish a set of reference baselines. Then, as work progresses, you monitor the work, analyze the findings, forecast the end results and compare those with the reference baselines. If the end results are not satisfactory then you make adjustments as necessary to the work in progress, and repeat the cycle at suitable intervals. If the end results get really out of line with the baseline plan, you may have to change the plan. More likely, there will be (or have been) scope changes that change the reference baselines which means that every time that happens you have to change the baseline plan anyway.But project cost control is a lot more difficult to do in pract

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