RESEARCH REPORT

Books Reviewed in this Article: Quantitative Approaches in Business Studies. Tackling Biology Projects. Investigating Statistics: A beginner's guide. Quantitative Analysis. Geographical Data Sources presentation and analysis. A Concise Course in A Level Statistics. Urban Data Sources and Methods In Geography.     

Calculating degrees of freedom for a structural equation model

Multivariate Analysis of Categorical Data: Theory. John P. Van de Geer, Newbury Park, CA: Sage, 1993, 104 pages.

Multivariate Analysis of Categorical Data: Applications. John P. Van de Geer, Newbury Park, CA: Sage, 1993, 128 pages.     

NetWare中FoxBASE^＋共享数据库方法

介绍网络环境中的FoxBASE^ 共享数据库方法及其实用技术。主要阐述了对数据库文件的操作：文件的加锁、解锁，共享地打开，共享操作技术和应该互斥操作的FOX命令。     

BOOK REVIEWS

Books Reviewed in this Article: Concise Statistics by M. G. Godfrey, E M. Roebuck and A. J. Sherlock. Exploring Data: An Introduction to Data Analysis for Social Scientists by Catherine Marsh. Statistics Book 1 (also Book 2) by M. E. M. Jones. Fieldwork Studies in Geography by Jack Gilleft. How to think about Statistics by John Phillips.     

工业多媒体及分布式超媒体数据库

多媒体技术正逐步形成一个新的分支──工业多媒体技术，它是自动控制技术、现代控制理论、信息工程、电子技术、传感器技术和计算机多媒体技术的多学科交叉，在应用中，它需建立分布式超媒体数据库。本文主要探讨多媒体技术的多学科交叉，在应用中，它需建立分布式超媒体数据库。本文主要探讨多媒体技术自动化和测控中应用的学科交叉及分布超媒体数据库。     

论大数据时代顶岗实习的课堂观察

研究从大数据时代的课堂观察概念、大数据时代顶岗实习课堂观察的意义、大数据时代顶岗实习课堂观察的学习、大数据时代顶岗实习课堂观察的路径四个方面,从理论到实践阐述了大数据时代顶岗实习的课堂观察。     

BOOK REVIEWS

Books Reviewed in this Article: Exploring Statistics with the TI-82 Graphics Calculator A series of articles for teachers. The Economist Pocket Britain in Figures (1997 Edition). Talking about Statistics: A Psychologist's Guide to Data Analysis. Teaching Statistics: Key Maths.     

数据挖掘中决策树分类算法的研究与改进

决策树分类算法是数据挖掘中一个重要的内容,而ID3算法又是决策树分类算法中的一种重要方法且被广泛应用。然而在实际应用过程中,现存的决策树算法也存在着很多不足之处,如计算效率低下、多值偏向等。为了解决这些问题,提出了一种基于ID3算法的加权简化信息熵算法,它提高了决策树的构建速度,减少了算法的计算运行时间,同时也克服了ID3算法往往偏向于选择取值较多的属性作为测试属性的缺陷。并且随着数据规模的增大,决策树的分类性能表现得越好。     

Book Reviews

Books Reviewed in this Article: Used Numbers. SMP 11-16 Handling Data Booklets. Statistics. Basic Statistical Computing. Innumeracy: Mathematical illiteracy and its consequences.     

Book Reviews

Book reviewed in this Article: Key Data 1994/5 Edition , Central Statistical Office. Fifty Things to do with Databases and Spreadsheets Centre for Statistical Education     

Book Review

Book reviewed in this article:
Using National Data Bases in Educational Research Thomas L. Hilton (Ed.)     

Letters

Books Reviewed in this Article: Facts and Figures: A practical approach to Statistics By David Baker. Stanley Thornes. 1989. Statistical Reasoning in Law and Public Policy: Volume 1, Statistical Concepts and Issues of Fairness By Joseph L. Gastwirth. Data Handling Skills in G.C.S.E. Science By Ian Pritchard.     

空间数据的数据库管理技术

空间数据是指具有空间含义的多维数据,它有广泛的应用领域,如气象学、地图学等。然而,由于空间数据的非结构化特点,传统管理方式是采用文件系统。存在诸如完整性、一致性、安全性等文面的问题。如何利用数据库技术管理空间数据是同行关注的问题。Oracle7的“空间数据选件”较好地解决这一难题,实现了属性及空间数据一体化管理,本文较为详细讨论Oracle7空间数据管理技术。     

基于OPC的变电所实时数据采集系统设计

研究了基于OPCSERVER的变电站综合自动化系统(实时数据采集模块),此方案具有用户操作简单、实时数据可靠性高等优点。所做的主要工作如下:(1)介绍了OPE基本概念及其工作的一般原理;(2)阐述了变电站综合自动化系统(实时数据采集模块)的系统结构及数据结构等。     

Support for Comprehensive Sexuality Education and Adolescent Access to Condoms and Contraception in South Carolina

A telephone survey was administered to residents of a historically conservative southern state to assess resident's level of support for comprehensive sexuality education (CSE) in schools and support for the availability of condoms and contraception to reduce unintended pregnancies and sexually transmitted infections. Data were obtained from 841 residents and findings revealed that the majority of residents: (a) support CSE, (b) support access to birth control, and (c) support the availability of condoms. Data were analyzed to determine characteristics of those in support of these prevention strategies so that data could inform key stakeholders, policy makers and health promotion strategies.     

Linking faculty development to community college student achievement: a mixed methods approach

Using a mixed methods, multilevel research design, this pilot inquiry explored the relationship between college faculty professional development and the academic achievement of diverse students by coupling two separate links: (a) the effects that professional development activities have on improving teaching strategies, and (b) the effects these teaching strategies have on student learning. Data were collected from administrators, faculty, and students to discover what teaching strategies are being used and, in their view, how these strategies affect learning outcomes. Data sources included a survey, documents, interviews, and observations. The case study institution is a New Mexico community college, and the research focuses on two academic programs with 145 students enrolled. Data analyses revealed three main themes: (a) faculty development and its link to teacher effectiveness and student learning outcomes are embedded in the mission, goals, and policies of the institution; (b) faculty development is considered vital, funding is always available, and faculty participate in on- and off-campus development activities to enhance their teaching effectiveness and student learning outcomes; and (c) the institution focused on collecting and analyzing student learning outcomes data, but no data-driven means for assessing the effectiveness of faculty development activities existed.     

A model for preservice teachers’ intentions to use ICT in future lessons†

This study proposes a model for determining preservice teachers’ intentions to use information and communication technology (ICT) in future lessons. Data were collected from 21 preservice teachers via interview in the first stage of the study and from 2904 preservice teachers from 16 different universities via a designed scale in the second stage of the study. Data were analyzed through structural equation modeling. A model capable of explaining 85% of variance in preservice teachers’ intentions to use ICT in their future lessons was developed. Perceived usefulness (PU) was seen to have the highest influence on their intentions, while facilitating conditions, social influence, and anxiety had a low direct effect. In addition, these factors were found to have a high indirect influence on intention through other factors such as PU, perceived ease-of-use, and efficacy.

Abbreviations: ICT: information and communication technology; M: mean; SD: standard deviation; SEM: structural equation modeling     

Letters

Books Reviewed in this Article: Statistics & Experimental Design - An Introduction for Biologists and Biochemists. Nuffield National Curriculum Mathematics Handling Data 4. Statistics for Science Projects.