Triadic Relations in a Game of Pachisi

A triad is the smallest network form where one can study how a link affects a link or a node affects a link indirectly connected. Through triads, one can glimpse the more complex relational dynamics in larger networks. Studies of various triadic relationships have gained growing interest among OM scholars in recent years as both researchers and practitioners recognize that such a triadic framework allows us to appreciate the relational complexity in larger supply networks. We adapted the Pachisi game to demonstrate the triadic relational dynamics among firms in a supply network. We have played this game in various undergraduate and graduate classes. This simple game has enabled us to introduce such topics as supply networks and coalition strategies in a lively classroom environment. We have received positive feedback from the students validating an effective learning experience.     

Video quality based link adaptation for low latency video transmission over WLANs

INTRODUCTION Low latency video transmission is very de manding in terms of the performance of all layers i the protocol stack. Over the last decade, research ha focused on enhancements of each individual laye without considering cross-layer interactions. Adapt ing video coding to the channel/network condition and technologies (and vice versa) (Girod et al., 2002 via the cross-layer exchange of information has onl recently been investigated. van der Schaar et al.(200 developed a cross-laye…     

略论儿童的早期教育

早期教育在整个教育过程中是非常重要的环节。目前,我区少数民族教育的早期教育阶段 是个薄弱环节,所以做为一个民族教育工作者,必须要了解为什么要进行早期教育,怎样进 行早期教育最为有效,早期教育有什么样的规律,以及早期教育存在一些什么误区等内容。     

New Simulation Methods to Facilitate Achieving a Mechanistic Understanding of Basic Pharmacology Principles in the Classroom

We present a simulation tool to aid the study of basic pharmacology principles. By taking advantage of the properties of agent-based modeling, the tool facilitates taking a mechanistic approach to learning basic concepts, in contrast to the traditional empirical methods. Pharmacodynamics is a particular aspect of pharmacology that can benefit from use of such a tool: students are often taught a list of concepts and a separate list of parameters for mathematical equations. The link between the two can be elusive. While wet-lab experimentation is the proven approach to developing this link, in silico simulation can provide a means of acquiring important insight and understanding within a time frame and at a cost that cannot be achieved otherwise. We suggest that simulations and their representation of laboratory experiments in the classroom can become a key component in student achievement by helping to develop a student’s positive attitude towards science and his or her creativity in scientific inquiry. We present results of two simulation experiments that validate against data taken from current literature. We follow with a classroom example demonstrating how this tool can be seamlessly integrated within the traditional pharmacology learning experience.     

复杂的凝视:《庭院里的女人》

《庭院里的女人》自公映以来 ,反响较大 ,出现了种种批评的声音。我们应清醒地看到这些批评存在的偏颇性 ,充分认识影片的内涵与价值 ,也应看到罗燕为沟通东西方文化所做的努力与贡献     

Theory-based Correlations and Their Role in Children's Concepts

Recent accounts of conceptual development have emphasized the important role intuitive theories play in concept formation; however, it is still not clear exactly how these theories exert their influence. We present evidence that elementary school age children use theories to link together specific features associated with individual concepts. The results of our first experiment indicate that theory-based correlations play a prominent role in typicality judgments and in decisions about category membership. In a second experiment, we demonstrate that children's theories play an important role in determining which attributes will be considered most central to the concept. The results of these studies suggest that feature correlations can serve to link children's concepts with their intuitive theories of the world.     

论汉语课堂教学环节

课堂教学是汉语教学的中心环节，汉语课堂教学环节包括启动环节、导入环节、展开环节、调整环节、结束环节、汉语课外学习实践活动等六部分，组织好课堂教学，就可以保证汉语教学目标的实现。     

平面构成在摄影艺术的延伸

本文通过分析平面构成和摄影课程的内在联系,阐述了构成法则在摄影艺术中是一种重要的表现形式,我们可以有效的引导学生把摄影创作提升一个新的高度。     

生物科学专业《无机及分析化学》课程的改革与探索

本文提出以素质教育为核心, 应需施教, 对该课程的教学改革进行了探索, 把无机化学和分析化学合并为一门课; 删除过于难深的内容, 增加与农业结合的内容; 结合实验课, 在教学内容、教学环节和教学手段上全面进行改革, 收到良好效果.     

Sociodemographic Inequality in Early Literacy Development: The Role of Teacher Perceptual Accuracy

Previous research has established that student learning is influenced by how accurately teachers perceive student academic ability. But studies rarely investigate the degree to which inaccuracies in teacher perceptions exacerbate demographic inequality in academic ability. Using a sample of almost 14,000 children from the Early Childhood Longitudinal Study, Kindergarten Cohort, we found that children whose literacy skills are overestimated by their teachers typically gain more literacy skills during kindergarten. Conversely, children whose skills are underestimated learn less. It is important to note that the skills of socioeconomically disadvantaged children are on average underestimated. As a result, inequalities in kindergarten literacy development stem in part from the links between teacher misperceptions and student background. We also explored the extent to which these relationships operate through practices associated with ability grouping. We found instructional grouping to be a weak facilitator of the link between teacher perceptions and student learning, suggesting the need for further research that identifies the social and structural classroom characteristics that link teacher perceptual accuracy to student learning.     

How adolescents navigate Wikipedia to answer questions / ¿Cómo navegan los adolescentes en Wikipedia para contestar preguntas?

Abstract

In one experiment, we explored how high school students use hyperlink relevance cues while they navigate to answer questions from hypertexts. Current evidence has shown that students may navigate by either performing a deep semantic analysis of the relationship between the question and the existing hyperlinks, or by matching words in the question to words in the hyperlink labels. We focused on how students combine both cues during navigation, and how comprehension skills relate to the use of such cues. Our study revealed that 14 year old students (N = 53) selected hyperlinks by relying to a similar degree on both word matching and semantic overlap. Furthermore, when there was a conflict between an irrelevant link cued via word matching and a relevant link only cued through semantic overlap, students’ comprehension skills facilitated their initial selection of an informative relevant link. To conclude, we discuss the implications of these results for current models of hypertext navigation.     

如何把握体育理论教学课堂提问

提问是理论课教学中十分重要的教学环节,认真把握提问的对象、时机、内容、方式、过程等环节,对顺利完成教学任务,达成教学目标将起到积极的作用.本文主要阐述了把握理论教学课堂提问的方法,为理论课教师更好地驾驭课堂提供理论指导.     

Residual Structures in Growth Models With Ordinal Outcomes

Growth models allow for the study of within-person change and between-person differences in within-person change. Typically, these models are applied to continuous variables where the residuals are assumed to be normally distributed. With normally distributed residuals there are a variety of residual structures that can be imposed and tested, which have been shown to affect model fit and parameter estimation. This article concerns residual structures in growth models with binary and ordered categorical outcomes using the probit link function. Different residual structures and their appropriateness for growth data are discussed and their use is illustrated with longitudinal data collected as part of Head Start’s Family and Child Experiences Survey 1997 Cohort. We close with recommendations for the specification and parameterization of growth models that use the probit link.     

独生子女大学生自我管理的研究

我们采用《大学生自我管理量表》对长沙市三所重点大学的259名大学生进行随机问卷调查。结果表明：与非独生大学生相比,独生男、女大学生在自我管理的某些维度上有显著差异;独生女大学生的自我管理要显著地好于独生男大学生。     

Research and Teaching: Conditions for a positive link

It has become increasingly clear over the past decade that the question of a positive link between research and teaching has no simple or general answer. At the same time, there may well be a positive link under particular conditions. This paper argues that a positive link can be due primarily to the processes, rather than the outcomes, inherent in research and teaching, and that, in particular, student-centred teaching and learning processes are intrinsically favourable towards a positive link, while more traditional teaching methods may at best lead to a positive link for the most able students, who in the perception of traditional academics are, of course, the future university teachers. This finding, in turn, leads to a rational explanation of the persistent myth of a general positive link. Finally, it is argued that pedagogic research and its outcomes could play an important role in strengthening the link.     

高职院校学生职业道德教育研究

当代高职院校的职业道德教育现状不容乐观,职业道德教育仍然是高职教育的一个薄弱环节,我们必须加强高职院校学生职业道德教育的工作力度。     

对开放教育考试改革的思考

考试是开放教育教学过程中的重要环节。开放教育在试点工作中,虽然在考试方式、考试方法等方面进行了积极的改革与探索,但改革力度并不显著,仍未摆脱应试方式、方法的束缚,不能体现基于计算机与网络的远程开放教育的特点,不能满足参加远程开放教育学习者的需求,因此,改革势在必行。本文认为,开放教育必须在考试的内容、形式、题型、时间等方面进行改革,完善开放教育考试的各个环节,建立与之相适应的、有别于传统普通高等教育的考试方式。     

Rate-distortion optimized frame dropping and scheduling for multi-user conversational and streaming video

INTRODUCTION Video packets are transmitted over the Internet using a best-effort service. Therefore, a large number of simultaneous video streams or cross traffic arriving at a network node (e.g. a multimedia gateway) may sometimes exceed the node’s forwarding capacity, i.e., the incoming data rate may exceed the outgoing data rate at the node. In this paper, we consider a scenario where M streaming videos and N conversa- tional videos pass through a network node with lim- ited forwardi…     

Students' Understandings of Gravity in an Orbiting Space-Ship

We report on an investigation of students' ideas about gravity after a semester of instruction in physics at university. There are two aspects to the study which was concerned with students' answers to a carefully designed qualitative examination question on gravity. The first aspect is a classification of the answers and a comparative study of the ways the problem was tackled by two large groups of students who had different backgrounds in physics and were exposed to different teaching styles. The second aspect is to investigate how students link concepts to solve the problem. We used a phenomenographic analysis of student responses to extract patterns of reasoning and alternative conceptions behind the solutions. We found no differences between the classes of answers given by students in the two courses. Our analysis also identifies a hierarchy in the complexity of the hypothetical reasoning pathways, which we interpret as reflecting the ways in which students may link concepts and resolve conflicts as they solve the problem. The hypothetical reasoning pathways may help educators to develop instructional material or lecture room dialogue in order to tease out key issues. An unexpected finding is that there is a discrepancy between our conclusion that the two groups of answers are similar and the distribution of marks awarded by the examiner – which implies that the quality of the answers is different for the two groups.     

Web Spam技术研究综述(英文)

Web spamming是指故意误导搜索引擎的行为,它使得一些页面的排序值比它的应有值更高.最近几年,随着web spam的急剧增加,使得搜索引擎的搜索结果也降低了一些等级.文章首先讨论了Spam的基本概念和影响,然后详细地分析了当前的各种Spamming技术,包括term spaming、link spamming和隐藏技术三种类型.我们相信本文的分析对于开发恰当的反措施是非常有用的.