Gesture as a window on children's beginning understanding of false belief

Given that gestures may provide access to transitions in cognitive development, preschoolers' performance on standard tasks was compared with their performance on a new gesture false belief task. Experiment 1 confirmed that children (N=45, M age=54 months) responded consistently on two gesture tasks and that there is dramatic improvement on both the gesture false belief task and a standard task from ages 3 to 5. In 2 subsequent experiments focusing on children in transition with respect to understanding false beliefs (Ns=34 and 70, M age=48 months), there was a significant advantage of gesture over standard and novel verbal-response tasks. Iconic gesture may facilitate reasoning about opaque mental states in children who are rapidly developing concepts of mind.     

Prioritizing the education of marginalized young people in Brazil: a collaborative approach

This paper explores constructions of the ‘new’ university student in the context of UK government policy to widen participation in higher education. New Labour discourse stresses the benefits of widening participation for both individuals and society, although increasing the levels of participation of students from groups who have not traditionally entered university has been accompanied by a discourse of ‘dumbing down’ and lowering standards. The paper draws on an ongoing longitudinal study of undergraduate students in a post–1992 inner‐city university in the UK to examine students' constructions of their experiences and identities in the context of public discourses of the ‘new’ higher education student. Many of the participants in this study would be regarded as ‘non‐traditional’ students, i.e. those students who are the focus of widening participation policy initiatives. As Reay et al. (2002) discovered, for many ‘non‐traditional’ students studying in higher education is characterized by ‘struggle’, something that also emerged as an important theme in this research. The paper examines the ways in which these new student identities both echo the New Labour dream of widening participation and yet continue to reflect and re‐construct classed and other identities and inequalities.     

Developing Children's Early Competencies to Engage With Science

Science educators have long been concerned with how formal schooling contributes to learners’ capacities to engage with science after school. This article frames productive engagement as fundamentally about the coordination of claims with evidence, but such coordination requires a number of reasoning capabilities to evaluate the strength of evidence, critique methods, and other factors upon which evidence evaluation rests, evaluating sources and potential biases, and so on. Although the general discourse on education commonly suggests students are bad at such things, we review cognitive development research that demonstrates children display a variety of capabilities, even at early ages, that can be productively built upon by formal science instruction. We use this research to suggest some possibilities for formal schooling to develop children's capacities for evaluating claims within the pursuit of personally meaningful goals. We conclude with observations of useful directions our analysis opens to research.     

基于元搜索的聚类挖掘引擎

针对目前搜索引擎返回结果的海量性和无结构性，构建一个基于元搜索的聚类挖掘引擎，旨在利用元搜索引擎返回的结果，提高搜索结果聚类效率，快速有效地为用户提供一个搜索结果结构视图，从而进行进一步的知识发现。介绍了搜索引擎和挖掘引擎的主要功能及差别，应用向量空间模型对元搜索结果进行处理。介绍当前主要的聚类算法-K—means划分法和层次凝聚聚类法，并在此基础上提出基于元搜索结果将两种聚类算法相结合的聚类方法。     

Enhancing Student Learning in Food Engineering Using Computational Fluid Dynamics Simulations

Abstract: The current generation of students coming into food science and engineering programs is very visually oriented from their early experiences. To increase their interest in learning, new and visually appealing teaching materials need to be developed. Two diverse groups of students may be identified based on their math skills. Food science students tend to find it difficult to use mathematics as a problem‐solving tool for food engineering problems. Food engineering students, on the other hand, should be challenged to use emerging mathematical tools to develop their problem‐solving skills. Therefore, the approach of this project involved the development of a curriculum to train undergraduate food engineers in the effective use of computational fluid dynamics (CFD) software to solve food engineering problems by engaging them in the creation of food engineering teaching tools. These CFD outputs were then used as innovative teaching tools for the food science students. In this paper, this concept will be illustrated by unsteady‐state heat transfer and fluid flow problems. To evaluate the efficiency of the teaching materials developed, a student focus group was asked to answer the same quiz following a conventional and CFD output aided teaching session. The assessment result showed an improved understanding of the subject after the CFD teaching session. These visual aids were excellent tools to illustrate the validity of the formulas presented in class. In addition, the new visual materials enabled a better understanding of the relationships among different process parameters. In general, this helped the food science students better appreciate the food engineering concepts that govern food processing operations.     

Application of a transversal laguerre network in adaptive equalization

Synchronous data transmission systems that transmit information over dispersive channels often employ adaptive equalization techniques in the processing of the received signals. Most equalizers presently used in communication systems are of the tapped delay line (TDL) type. In this paper, we propose a class of adaptive equalizers of which the TDL equalizer is a member. Another interesting member of this class is the Laguerre adaptive equalizer which is to be introduced in this paper. The configuration of the Laguerre equalizer is developed. It is found, as shown by the examples, that the Laguerre equalizer is more accurate, and is less sensitive to timing error than the conventional TDL equalizer.     

从英汉互译实例浅析"功能对等"翻译标准

近年来,美国语言学家兼翻译家Nidar的“功能对等”理论成为翻译理论领域的主流。该理论现已被广泛采纳并应用于社会生活各个领域的翻译,它对从事翻译工作的人士或第二语言学习者具有重要的指导意义。分别以词汇、语句和语篇为基本翻译单位,通过对比英汉两种语言在形式、语义和语用等方面的异同和两种语言人们的审美和情感倾向性的异同,来探讨翻译中如何运用“功能对等”这一翻译标准。     

Effectiveness of Multimedia Pedagogical Agents Predicted by Diverse Theories: a Meta-Analysis

Multimedia pedagogical agents are on-screen characters that allow users to navigate or learn in multimedia environments. Several agents’ characteristics may moderate their instructional effectiveness, including appearance, gender, nonverbal communication, motion, and voice. Here, we conducted a meta-analysis to test hypotheses from diverse theories predicting the effects of these agents’ characteristics. We tested predictions of cognitive load theory, cognitive theory of multimedia learning, computers are social actors, social agency theory, uncanny valley, and the action observation network. Our meta-analysis of 32 effect sizes (N?=?2104) revealed a small overall effect (g+?=?0.20), showing that learning with multimedia pedagogical agents was more effective than learning without these agents. As predicted by the redundancy effect of cognitive load theory and the coherence principle of cognitive theory of multimedia learning, 2D agents (g+?=?0.38) tended to be more effective than 3D agents (g+?=?0.11). As predicted by the computers are social actors hypothesis, most of the agents’ characteristics, including nonverbal communication, motion, and voice, appeared not to moderate their effectiveness. We conclude that multimedia pedagogical agents help learning through multimedia, and that students may be able to learn similarly from different types of agents.

     

中国女排与世界女排强队跳发球运用效果的比较研究

本文从回顾排球发球技术的历史入手 ,论述了跳发球的技术特点 ,并根据中国女排在世界杯赛上跳发球的效果及同世界强队的差距 ,有针对性地提出相应的对策。