组态软件在PLC控制应用技术课程教学中的应用

监视与控制通用系统,即MCGS,是一种常用于工业控制的组态软件,随着经济的发展和计算机技术的提高,越来越多的工业采用自动化控制、生产、管理技术,因此很多高校也纷纷将该软件教学纳入课堂教学中。主要探讨了组态软件在PLC控制应用技术课程教学中的应用。     

Risk-aversion: understanding teachers’ resistance to technology integration

Teachers who do not integrate technology are often labelled as ‘resistant’ to change. Yet, considerable uncertainties remain about appropriate uses and actual value of technology in teaching and learning, which can make integration and change seem risky. The purpose of this article is to explore the nature of teachers’ analytical and affective risk perceptions, and how these influence decisions to integrate technology in their teaching practice. These ideas are explored through an in-depth qualitative analysis of teacher interviews focusing on experiences with, and beliefs about, technology and teaching. Results suggest decisions to integrate technology in teaching are influenced by negative affective responses to technology, general risk-aversion in teaching, and the perceived value of technology in teaching. The risk analysis framework and findings presented in this paper can be used to support communication with teachers to minimise perceived risks and, where appropriate, help support future technology use.     

基于Android的XML解析器的分析与比较

Android平台上应用程序访问Web服务时,多数都会使用XML的解析技术．文中从工作原理、常用接口及类方法,XML文档解析的过程三个方面,分析比较Android所支持的三种解析技术：DOM、SAX、XML Pull．指出Android平台上选用何种解析技术主要取决于三方面的因素：移动设备内存的大小、XML解析文档的大小,以及移动应用程序中解析文档的主要用途．     

An investigation of two-way text messaging use with deaf students at the secondary level

Deaf and hard-of-hearing students are often delayed in developing their independent living skills because of parental restrictions on activities outside the home due to worries about their child's inability to communicate, their whereabouts, and their general safety. Recent accounts of the use of two-way text messagers suggests that, like electronic mail, distance communication problems that have long plagued deaf people may be ameliorated--by the use of such technology (M. R. Power & D. Power, 2004; S. S. Rhone & Cox News Service, 2002). This project was designed as an initial foray into investigating the use of two-way text messaging technology as a way of increasing the independence of deaf adolescents and reducing their parents' anxiety about their safety and responsibility. All the deaf and hard-of-hearing students in the deaf and hard-of-hearing programs at two urban high schools (ages 13-19), the staff of the deaf departments at these two schools, and the parents/guardians of the students participated in this study. Preuse surveys, postuse surveys, and monthly statistics on the number of times each pager was used enabled us to chart how often the participants used the technology. The data were used to identify concerns that parents have about student independence and safety, the extent to which deaf students engage in independent activities, and expectations surrounding how two-way text messaging use might increase independence and literacy skills. The data collected on this project to date confirm that two-way text messaging technology is indeed useful for deaf adolescents and helps alleviate some of the concerns that have kept them from developing independence as quickly or readily as their hearing peers. The potential policy implications for this research are discussed.     

小波分析在钢板裂纹电涡流检测中的应用

在钢板的表面裂纹的在线检测中,经常利用电涡流检测技术,但是获得信号比较微弱,而且干扰严重;文章将小波变换引入到信号的处理中,对检测信号进行除噪,并加强其特征值,进而得到较好的检测信号。     

多媒体网络教学中的流式媒体传输方式

现代远程教育是计算机技术和网络通信技术相结合的产物，而多媒体技术是Internet上最热门的技术。本详细地论述多媒体在IP网络上的传播技术－－流式媒体传播技术及在远程教学系统中的应用。     

Learning design for multiple modes of provision: the Zambian community school teacher development programme

Abstract

The use of technology to support learning is becoming ubiquitous in Africa. However, technology is more often used to distribute information rather than as a tool to mediate learning. The work presented here on a programme for Zambian community school teachers (non-traditional students) illustrates how learning design allied to appropriate theoretical concepts make use of technology to mediate learning. The objective of this course was to support Zambian community school teachers, with little formal teacher education, to use interactive methods to support their teaching practices. The research makes use of a constructivist-hermeneutic-interpretivist-qualitative paradigm to critically evaluate the learning design by experts. A social constructivist framework for learning design and technology mediation was used to create and evaluate learning resources. The work illustrates how a distance education paper-based course design is enhanced by the use of contemporary learning theory and digital technology to model good interactive classroom practice.     

Using digital technology to enhance formative assessment in mathematics classrooms

In this paper, which is based on research from the EU-funded project Improving Progress through Formative Assessment in Science and Mathematics Education, we explore how iPads are used within formative assessment processes by six mathematics teachers and their classes in two secondary comprehensive schools in the Midlands of England. A design research approach is first used to develop and trial six lessons in which iPads are used in different ways within formative assessment processes. Through lesson observations, video analysis and teacher interviews we then examine how iPad technology contributes to these processes, the functions it performs and the distribution of activity between the main actors (teacher, technology and student). An analytic approach is developed which captures the interactions in visual representations, showing how the technology is often used as a form of communication but also performs more active functions which affect the role taken by the teacher in formative processes. The study offers insight into ways in which iPad technology contributes to effective student learning through formative assessment and introduces an analytic approach that may be useful for further studies.     

多媒体技术在中学英语教学中存在的问题及建议

文章以目前教师利用最多的计算机多媒体技术为例,说明中学英语教师在利用现代教育技术中存在的问题,分析问题的原因,并提出建议,以期能够提高教师利用计算机多媒体技术辅助英语课堂教学的效率.     

Maximising the educational affordances of a technology supported learning environment for introductory undergraduate phonetics

New technologies afford a range of opportunities that can transform teaching techniques and offer enhanced possibilities for learning. This potential is often not grasped by the technologist or the educationalist when introducing new technologies into the learning situation and a situation arises which can be described as "New technology, no new pedagogy" This paper examines why this situation arises, before progressing to suggest a set of target areas the affordances of new technology ought to transform when introduced into the socio–cultural learning environment (Vygotsky, 1978). This set of target areas is illustrated through the presentation of a technology supported learning environment for introductory undergraduate phonetics. Each course module is discussed in relation to these targets and how the affordances of new technology are used to meet them. The student and lecturer reflections on the course indicate that the use of new technology as applied in this introductory undergraduate phonetics course was appropriate, although not always 100% successful.     

Reframing and Articulating Socio-scientific Classroom Discourses on Genetic Testing from an STS Perspective

In recent decades, Science & Technology Studies (STS) have revealed the dynamic interaction between science and technology and society. Technology development is not an autonomous process and its artifacts are not socially inert. Society and technology shape each other. Technologies often have ‘soft impacts’ in terms of unpredicted side effects on individuals and society. Nevertheless, current societal discourse on technological innovations is still dominated by ‘hard impacts’ such as quantifiable risks for health, safety and the environment. Furthermore, participants in socio-scientific discourses often underestimate their agency in influencing technological innovations, and at the same time overestimate their freedom of choice to use a technology. Past debates on technological innovations have shown how these debates were framed and often caught in fruitless discourse patterns or arguments. Interventionist STS research experiments with solutions to this problem. Assuming that an STS perspective is helpful in reframing and articulating socio-scientific classroom discourses, the case of genetic testing is used to explore this. An important positive ‘hard impact’ of genetic testing is disease prevention. However, this is put into perspective by addressing ‘soft impacts’ such as limited access to certain careers based on genetic risk and changes in the conception of health and the perception of responsibility for one’s health. Discussion stoppers such as ‘playing God’ or ‘We can’t stop technological advancement’ can be challenged through uncovering underlying assumptions. The use of narratives and future scenarios in classrooms seems fruitful in provoking imagination and engaging students in public debates on technological innovations.     

基于文本编辑方式下的ASP脚本调试技巧

基于ASP技术WEB应用系统的开发正在广泛流行,而大量的初学者面临着如何在文本编辑方式下对脚本程序的编写与调试问题。通过ASP中脚本程序常见错误进行分析,并且指出相应的代码编写及调试技巧,为ASP开发的初学人员提供捷径。     

Technology education and science education: Engineering as a case study of relationships

Technology education and science education are seen to be related in a particular fashion by many science educators, a relationship exemplified by the common pairing of the two areas in labels such as “Science-Technology-Society” and “Science and Technology Curriculum”. At the heart of this common science education perspective is a view of technology education as dependent on and subservient to science education. In this paper engineering, often seen by scientists as a form of applied science dependent on and subservient to science, is considered. An analysis of the arguments that engineering, far from being an applied science, is a unique way of knowing (that engineering has a unique epistemology) is used to consider the technology education view of the relationships between science education and technology education. It is suggested that science educators need to rethink their perceptions of this relationship if they are to understand the arguments of technology educators. Specializations: science education, teacher education.     

Home and away: the use of institutional and non-institutional technologies to support learning and teaching

This paper examines the usage of institutional and non-institutional technologies to support learning and teaching in UK higher education. Previous work on disruptive technology and disruptive innovation has argued that users prefer simple and convenient technologies, and often repurpose technologies from designers' intentions; this paper evaluates its data in relation to this argument. The paper uses a structured observation as its research instrument; seven participants (three lecturers and four students) were given one of two tasks. Results showed the participants using a narrow range of technologies, and showed a preference for non-institutional over institutional technologies. The paper argues that there is a misalignment between the technologies provided by higher education institutions (HEIs) and the technologies used in practice by students and lecturers, and further argues that disruptive technology and disruptive innovation comprise a useful means of assessing the likely success, in terms of usage, of a technology.     

A case study of how a sample of preservice teachers made sense of incorporating iPads into their instruction with children

The increased use of and demand for technology in early childhood education classrooms and programs creates new challenges for practicing and preservice early educators being asked to employ such technology within their teaching. Early childhood teacher education programs have struggled to meet these demands for teaching their students how to integrate such technology into their instruction with young children. Preservice teachers who do receive such training often fail to develop the skills and/or beliefs required to implement technology effectively into their own classrooms. The study reported on in this article addresses this issue by providing insight into how a sample of early childhood preservice teachers who used iPads and their apps in their coursework and high-stakes early learning field placements made sense of using these devices as teachers. Such findings illuminate instructional opportunities for teacher educators to consider as they seek to assist their students in making sense about how to implement as well as adopt appropriate and effective instructional strategies into their own classrooms.     

Research on Scaling Up Evidence-Based Instructional Practice: Developing a Sensitive Measure of the Rate of Implementation

Few evidence-based instructional practices achieve large-scale use, often remaining only in the schools directly involved in their development. Research on scaling up effective educational practice often lacks sensitive measures of the practice's implementation and the required research protocol. This article describes how we used rate of implementation as a sensitive measure to help identify barriers to implementation of class-wide peer tutoring (CWPT). Using communication technologies and a learning management system, we monitored the rate of CWPT implementation and its research protocol across nine schools in five states. Rate of implementation was defined as the number of weeks in which a school successfully completed the 12 implementation tasks required to reach full implementation. We discuss factors related to the variation in implementation rate (30-50 weeks) between schools, and implications of this measurement strategy for research on instructional practices and the technology used to facilitate scalability research.     

Developing a tobacco survey for deaf youth

Formidable barriers hinder use of standard data collection methods among deaf youth. Culturally and linguistically sensitive data collection strategies are needed to identify the unmet health and programming needs of this population. Unfortunately, researchers often fail to describe the issues involved in developing such targeted methods. The authors describe development of a culturally appropriate data collection instrument for a study of tobacco-related knowledge, attitudes, and practices among deaf youth. The instrument uses interactive multimedia technology to administer a questionnaire translated into the primary languages used by the Deaf. The procedures taken to accommodate this technology to these languages and to Deaf culture are described. This process yielded useful insights with respect to data collection not only among the Deaf, but among other frequently overlooked and underserved populations as well.     

Online Learning as a catalyst for reshaping practice – The experiences of some academics developing online learning materials

While tertiary teaching staff are familiar with teaching strategies used in traditional course delivery, the design and delivery of courses integrating new technologies such as online materials poses new challenges for many. Hence, although technology may be used, its use is often at a superficial level, failing to have significant impact on teaching practice. Motivated by the authors' belief that the development of online learning materials is an endeavour aimed at improving the quality of the learning environment, this paper explores the experiences of several lecturers within Griffith University as they engage in the design and development of online materials as part of the university's flexible learning initiative. Insights into the experiences and perceptions of teaching staff developing online materials are used to highlight issues that can then be used to inform appropriate professional development support for tertiary staff. This in turn will enable the integration of technology into the learning environment to act as a catalyst for positive changes to teaching practice.     

"梦"与"窗"--谈电影与电视的区别

电影与电视的区别,通常用"梦"与"窗"来形容.文章从三个层面分析电影与电视的区别,即技术层面、艺术层面和接受层面.技术层面从制作技术、传播技术和呈现技术三个方面来论述;艺术层面从艺术综合、艺术选材和艺术表现三个方面来论述;接受层面从接受环境、接受主体和接受心理三个方面来论述.最后指出正是由于电影与电视之间存在的区别,电影才不会消亡.     

Eye-tracking verification of the strategy used to analyse algorithms expressed in a flowchart and pseudocode

The results of qualitative and quantitative investigations conducted with individuals who learned algorithms in school are presented in this article. In these investigations, eye-tracking technology was used to follow the process of solving algorithmic problems. The algorithmic problems were presented in two comparable variants: in a pseudocode and flowchart. The eye-tracking data resulted in both qualitative (films registering the gaze paths) and quantitative measures, which allowed the detection and interpretation of the differences in the task-solving strategies between those who found the correct answer and those that did not. The results confirmed a hypothesis that use of the formal notation characteristic of a programming language for presenting algorithms is often a practical difficulty in the process of solving even simple tasks. This study opens a new direction of research; they show that eye-tracking technology can be used to optimise the educational process of learning programming.