Reconceptualising educational assessment in South Africa — testing times for teachers     

John Pryor  Cassius Lubisi 《International Journal of Educational Development》2002,22(6)

This paper explores some of the problems arising when Continuous Assessment (CA) is grafted onto established pedagogic practices. It focuses on three issues: teachers' restricted understandings of assessment, teachers' emphasis on criteria that demonstrate concern with social control, and some of the problems connected with peer assessment. Two vignettes derived from fieldwork associated with a project to improve the quality of primary education are used to raise the issues. We argue that the development of desired practices is hampered above all by tacit values in tension with those underpinning the new curriculum. These values, together with the complexity of curriculum design, create serious problems of manageability and interpretation, which can only be addressed through detailed interactive in-service training, aimed at reconceptualising teachers' notions of assessment.  相似文献   

Volterra积分方程解的存在性     

端木连喜 《临沂师范学院学报》2004,26(3):22-25

建立了Volterra积分方程存在三个非负解的一些标准，并给出了结论的具体运用．问题的证明中运用了LeggettWilliams不定点理论．  相似文献   

Numerical method to determine mechanical parameters of engineering design in rock masses     

薛廷河  项贻强  郭发忠 《Journal of Zhejiang University. Science. B》2004,(7)

INTRODUCTION The historical development of research in rockmechanics has yielded numerous useful and work-able theories. The Coulomb Criterion (1772) andMohr’s Hypothesis (1990) both provide easy andeffective methods for determining mechanical pa-rameters such as rock strength. R.E. Goodmanformulated the equation of mesh and non-meshjoints construction. Other researchers conductedexperiments on different types of rock masses withspecific, unique properties, to solve increasinglyc…  相似文献   

从词义角度谈现在进行时言外之意     

陈伟平 《钦州学院学报》2003,18(1):54-58

英语时态形式与意义不一致的现象是广大英语学习者在英语应用中很容易产生错误的地方。时态的意义和用法并不能以时态形式笼统解释。现在进行时不表示"正在进行"的原因正是动词本身的词义所决定的。根据词义,动词有静态动词和动态动词之分,现在进行时除表示"现在正在进行"的行为动作以外,还包括表示"过去"、"将来"、"渐进"、"重复"、"临时"、"描述"等意义。  相似文献   

When is a X2 not a X2?     

A. C. KIMBER 《Teaching Statistics》1987,9(3):74-77

  相似文献   

爱因斯坦对布朗运动的解释与现代统计动力学     

张太荣 《六盘水师范高等专科学校学报》2007,19(3):28-32

回顾爱因斯坦对布朗运动的统计解释.介绍用连续时间随机行走模型对布朗运动粒子行为进行描述,与爱因斯坦的结论进行了比较而得出结论:由连续时间随机行走模型得出的结论比爱因斯坦的结论更具有一般性.  相似文献   

VUHZ电磁液位监测系统在连铸机上的应用     

毕海合 《环球赛鸽科技》2015,(14)

VUHZ电磁液位传感器在世界各大钢厂占有非常重要的份额,性能稳定,使用简单便于维护。本文从电气硬件设定和PLC程序软件两个方面介绍VUHZ液位监测系统在结晶器液位控制方面正确使用。  相似文献   

放射性物位计在连续重整装置的应用     

杨霄 《科技广场》2015,(2)

催化剂再生系统是连续重整装置反再部分的核心环节。在催化剂再生和循环的过程中需要准确检测催化剂的物位,为控制系统提供可靠参数。放射性物位计就是一种能准确检测设备中催化剂物位的仪表。本文介绍了放射性物位计的工作原理、配置方法和防护事项。同时,结合国产连续重整工艺,介绍了放射性物位计在连续重整中的设置和标定。  相似文献   

Examining citizens' perceived value of internet of things technologies in facilitating public sector services engagement     

Ramzi El-Haddadeh  Vishanth Weerakkody  Mohamad Osmani  Dhaval Thakker  Kawaljeet Kaur Kapoor 《Government Information Quarterly》2019,36(2):310-320

With the advancement of disruptive new technologies, there has been a considerable focus on personalisation as an important component in nurturing users' engagement. In the context of smart cities, Internet of Things (IoT) offer a unique opportunity to help empower citizens and improve societies' engagement with their governments at both micro and macro levels. This study aims to examine the role of perceived value of IoT in improving citizens' engagement with public services. A survey of 313 citizens in the UK, engaging in various public services, enabled through IoT, found that the perceived value of IoT is strongly influenced by empowerment, perceived usefulness and privacy related issues resulting in significantly affecting their continuous use intentions. The study offers valuable insights into the importance of perceived value of IoT-enabled services, while at the same time, providing an intersectional perspective of UK citizens towards the use of disruptive new technologies in the public sector.  相似文献   

Honey-bee mating optimization (HBMO) algorithm for optimal reservoir operation   总被引：2，自引：0，他引：2  

A. Afshar  M.A. Mariño  B.J. Adams 《Journal of The Franklin Institute》2007,344(5):452-462

In recent years, evolutionary and meta-heuristic algorithms have been extensively used as search and optimization tools in various problem domains, including science, commerce, and engineering. Ease of use, broad applicability, and global perspective may be considered as the primary reason for their success. The honey-bee mating process has been considered as a typical swarm-based approach to optimization, in which the search algorithm is inspired by the process of real honey-bee mating. In this paper, the honey-bee mating optimization (HBMO) algorithm is presented and tested with a nonlinear, continuous constrained problem with continuous decision and state variables to demonstrate the efficiency of the algorithm in handling the single reservoir operation optimization problems. It is shown that the performance of the model is quite comparable with the results of the well-developed traditional linear programming (LP) solvers such as LINGO 8.0. Results obtained are quite promising and compare well with the final results of the other approach.  相似文献