A diffractive reading of dialogical feedback through the political ethics of care     

Vivienne Bozalek  Veronica Mitchell  Arona Dison  Melanie Alperstein 《Teaching in Higher Education》2016,21(7):825-838

With regard to improving higher education feedback practices, there is an increasing interest in using the efficacy of dialogue rather than the more traditional unidirectional approaches. We build on this impetus by considering how the ethics of care can be used to analyse the dialogical aspects of feedback. By diffractively reading insights of Boud and Molloy [2013a. “What is the Problem with Feedback?” In Feedback in Higher and Professional Education: Understanding it and Doing it Well, edited by D. Boud, and E. Molloy, 1–10. London: Routledge; Boud, D., and E. Molloy. 2013b. “Rethinking Models of Feedback for Learning: The Challenge of Design.” Assessment &; Evaluation in Higher Education 38 (6): 698–712] on dialogic feedback through the moral elements of care ethics, this paper proposes a novel way of discerning the extent to which the dialogical giving and receiving of feedback contributes to learning. To illustrate this, we draw on experiences from an Emerging Technologies professional development course for higher educators. We examine our own dialogical interactions of giving and receiving feedback using the moral elements of care ethics – attentiveness, responsibility, competence, responsiveness and trust, to provide a concrete example of how the ethics of care can be used productively for evaluating feedback practices.  相似文献   

丙烯催化聚合产物的X-射线衍射 Ⅱ.产物经熔体结晶形成的结构     

杨始堃  郭誉文  刘佑习 《中山大学学报论丛》1990,(3)

探讨了几个反应条件制得的聚丙烯的熔体结晶形成的结构问题,表明改变聚合温度等条件,不仅产物的等规度、结晶动力学过程受影响,而且β晶的形成能力有明显差异;在现有实验条件下,乙烯共聚改性产物不形成β晶,且随结晶条件改变,2θ=21°衍射峰高不同,它反映形成聚乙烯的结晶多少不同,若共聚物中有足够的长度的聚乙烯链段的话。  相似文献   

贝塞尔—高斯光束圆孔衍射场的传播特性     

徐寿泉 《株洲师范高等专科学校学报》2003,8(2):1-5,12

用标量Kirchhoff-Huyghons衍射积分导出Bessel-Gauss光束，Bessel光束-Gaussial光束圆孔衍射场轴向及横向场强分布的解析表达式，比较了它们的传播特性，探讨了Bessel-Gauss光束在无衍射传播距离上其传播行为依赖于孔半径，束腰参数以及横向波数。  相似文献   

Cantor分形光栅衍射场的自相似性分析     

徐寿泉 《株洲师范高等专科学校学报》2005,10(5):5-9

用平移相因子描述Cantor型分形光栅衍射场，分析了这一类型衍射场的自相似性。  相似文献   

不涉及结构的多晶X射线衍射全谱拟合及相关定量分析方法     

苗伟  陶琨 《实验技术与管理》2007,24(10):40-44

建立了不涉及结构的多晶X射线衍射全谱拟合定量分析方法、相关定量分析方法及其中文视窗版应用程序,其中包括PDF2组合全谱拟合定量分析法、自定义卡片组合全谱拟合定量分析法、自测各单相谱组合全谱拟合法,以及全谱峰分离定量分析法和积分强度K值定量分析法。各方法均使用积分强度的方案,从而排除了以峰高法计算强度的本征缺陷。并通过设计模拟谱和实际样品衍射谱验证了这些方法的可行性。指出了在使用PDF2数据库时,需要考虑对实际测试和所用PDF2卡片的单色器使用情况进行一致化校正,程序中含有此功能。  相似文献   

光的衍射和漫反射现象教学创新与拓展     

吕海军  赵文辉  刘艳磊  张静 《教育教学论坛》2019,(25):156-157

在大学物理教学中,光的衍射现象和漫反射效应是必备的知识点。在理想条件下,夫琅禾费单缝衍射中会有衍射光芒并带有明暗相间条纹的出现,有色粉末的研磨程度越高,漫反射越强,颜色越深。把光的衍射现象和漫反射效应的演示带入课堂,引导学生对影响现象的因素进行探讨,并给出合理的解释。  相似文献   

纳米Co/Fe/Cu合金的X射线衍射分析     

王锋 《泉州师范学院学报》2003,21(2):28-32

通过X射线衍射和磁电阻测量，对快淬法制备的铸态和退火处理的Co15-xFexCu85(X＝0，3，6，9，12，15)系列样品颗粒合金进行了结构和输走性质的研究．发现了造成Co—Fe—Cu合金输运性质变化的Co、CoFe相分离过程，这结果与Co—Fe—Cu合金相图相一致．在快淬CoFeCu样品中磁电阻效应小于CoCu样品．条带是多晶体，颗粒尺寸为几百纳米．  相似文献   

畸变光束圆孔衍射的研究     

江腾蛟 《嘉应学院学报》2013,(8):36-39

采用Zernike多项式拟合元件位相畸变的方法,提出了波前畸变圆孔衍射模型,并进行了波前畸变圆孔衍射及其和理想状态下圆孔衍射的比较.通过分析,不同波长经过球差波前畸变圆孔衍射,最大光强分布的位置是不同的,与理想圆孔衍射的光强分布位置差别比较大,波前畸变对衍射光强分布有很大的影响.  相似文献   

Willystine Goodsell (1870–1962) and John Dewey (1859–1952): history,philosophy and women’s education     

Joyce Goodman 《History of education》2013,42(6):837-854

This article explores the work of history and philosophy in publications by Willystine Goodsell, professor of history and philosophy at Teachers College, Columbia University, and the entanglement of Goodsell’s approach to scholarship with that of her doctoral supervisor John Dewey. The article experiments with diffractive reading to examine Dewey’s and Goodsell’s approach to history, as well as Goodsell’s configuration of women’s historical and contemporary participation in education. It looks at Dewey’s comment that women’s ‘philosophising’ would not be the same ‘in viewpoint or tenor’ as that composed from the ‘different masculine experience of things’ and investigates the principles that order liberal and vocational education in Goodsell’s view of a reformed education for women. The conclusion asks whether diffractive reading is an enhanced form of intertextuality.  相似文献   

不规则形状粒子Fraunhofer衍射计算     

赵剑琦 《中国科学院大学学报》2011,28(4):462-466

讨论了半透明不规则形状粒子Fraunhofer衍射积分的计算问题.借助于标量Kirchhoff理论,推导出关于衍射的3种新的相互等价的1D围线积分形式,直接摆脱了通常2D面积分中繁琐的区域划分的束缚.在此基础上求得投影截面为任意多角形粒子衍射的解析结果.  相似文献