Ordinal regression by a gravitational model in the field of educational data mining

Educational data mining (EDM) is a research area where the goal is to develop data mining methods to examine data critically from educational environments. Traditionally, EDM has addressed the following problems: clustering, classification, regression, anomaly detection and association rule mining. In this paper, the ordinal regression (OR) paradigm, is introduced in the field of EDM. The goal of OR problems is the classification of items in an ordinal scale. For instance, the prediction of students' performance in categories (where the different grades could be ordered according to A ? B ? C ? D) is a classical example of an OR problem. The EDM community has not yet explored this paradigm (despite the importance of these problems in the field of EDM). Furthermore, an amenable and interpretable OR model based on the concept of gravitation is proposed. The model is an extension of a recently proposed gravitational model that tackles imbalanced nominal classification problems. The model is carefully adapted to the ordinal scenario and validated with four EDM datasets. The results obtained were compared with state‐of‐the‐art OR algorithms and nominal classification ones. The proposed models can be used to better understand the learning–teaching process in higher education environments.     

现代教育技术条件下教师角色转变的策略

现代教育技术条件下,教学内容,教学目标和教学方法及师生关系等都发生了全新的变化。教学模式从原来的单一模式向着多元化发展,要求教师由“经验型”向“研究型”过渡,探讨网络环境下教师角色的转变有着一定的现实意义。教师作为知识源等辅助性的外围作用在很大程度上为各种媒体技术所替代,教师工作中那些简单、机械性的劳动将更多地由计算机等媒体来完成。因此,教师角色向多重性演变。     

Mentor modeling: the internalization of modeled professional thinking in an epistemic game

Players of epistemic games – computer games that simulate professional practica – have been shown to develop epistemic frames: a profession's particular way of seeing and solving problems. This study examined the interactions between players and mentors in one epistemic game, Urban Science. Using a new method called epistemic network analysis, we explored how players develop epistemic frames through playing the game. Our results show that players imitate and internalize the professional way of thinking that the mentors model, suggesting that mentors can effectively model epistemic frames, and that epistemic network analysis is a useful way to chart the development of learning through mentoring relationships.     

Technological determinism in educational technology research: some alternative ways of thinking about the relationship between learning and technology

This paper argues that research on the educational uses of technology frequently overemphasizes the influence of technology. Research in the field is considered a form of critical perspective, and assumptions about technology are questioned. Technological determinism is introduced, and different positions on this concept are identified. These are used to discuss the ways in which work within the field might be described as technologically deterministic. Four theoretical perspectives (activity theory, communities of practice, actor–network theory, and the social construction of technology) are then briefly characterized, demonstrating that alternative positions are viable, and positioning each in relation to the earlier discussion of technological determinism. The paper concludes by arguing that research, building on such alternative conceptions of technology, is important in developing our understanding of the relationship between technology and learning, as well as identifying potential methodological implications.     

CAI 在 X-射线衍射实验教学中的应用

简述了计算机辅助教学（ＣＡＩ）软件在实验教学中的意义,介绍了由暨南系开发的“多晶Ｘ－射线衍射实验”ＣＡＩ教学软件的功能特色,组成结构以及该软件在实验教学中的应用。     

市政设施管理信息系统的面向对象设计与实现

根据对面向对象分析,设计与建模及可复用构件理论的研究,结合在软件开发中的实践经验,采用当前面向对象领域最为流行的统一建模语言进行系统的建模,开了一套科学,的“市政设施管理系统”从而使得市政部门能迅速掌握市政设施的基本情况,产能及时,准确地作出科学的决策。     

浅谈综合布线系统

综合布线系统(Premises Distributed System,简称PDS)是一套应用于建筑物内或建筑群之间为计算机、通信设施与监控系统预先设置的信息传输通道。它将语音、数据、图像等设备彼此相连,同时能使上述设备与外部通信数据网络相连接。     

基于C/S和B/S模式的学分制下的高校教学管理信息系统的运行与实践

本文介绍了我校"教学管理信息系统"的运行现状。强调建立健全管理规章制度、明确各职能部门的工作职责、协调各部门的工作关系、及时更新系统内的数据信息、经常培训操作人员是保证系统健康运行的基本前提。为确保系统正常运行,对系统管理员、管理部门工作人员和师生提出了基本要求。     

Organized knowledge sharing with book-centered Web sites: An architecture, implementation and analysis

For educators, the World Wide Web offers a valuable technology for knowledge sharing. It can complement more traditional approaches to knowledge sharing such as books and lectures. Here, we identify and differentiate three major approaches for Web-based knowledge sharing: course-centered sites, subject-centered sites, and book-centered sites. A rationale for book-centered sites, those developed to facilitate students’ and instructors’ efforts in courses that use the book, is advanced. We introduce an architecture of features that can guide developers of such sites. This is illustrated by a book-centered site implemented according to the architecture. Several sites for introductory business computing books are compared and contrasted in terms of the architecture, suggesting ways in which each can be extended. This revised version was published online in July 2006 with corrections to the Cover Date.     

Psychology for the public: A content analysis of Psychology Today..

Surveyed the extent to which Psychology Today (PT) has maintained an empirical basis for its articles and the degree to which psychologists and individuals with doctorates have been responsible for PT articles. Two samples of PT were selected for review by 2 raters (the present authors). Findings indicate that not only have PT articles significantly shifted away from a presentation of empirically based data, but the proportion of articles authored by psychologists, as well as the educational level of authors, has declined, particularly in the last 3 yrs. (4 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)