通信的安全技术

从现代保密军事通信的实际出发,介绍两种通信数字技术:频率捷变(FA)和直序(DS)扩频调制技术。     

The impact of information technology on internal communication

This study explored the impact of information technology on internal communication at a tertiary education institution. An employee survey was distributed to determine the current impact of information technology on internal communication, and to explore the possible impact of two further information technology based communication systems. The survey found that despite a preference for face-to-face communication, respondents were better informed, more willing to communicate and exchanged more job-related information since the introduction of e-mail, voice mail and Wordview (policy and academic documents available on the network). The survey explored the possibility of introducing an electronic meeting system with 50% of respondents willing to try such a system. As the majority of respondents spend minimal time travelling and freely give their opinions at meetings, however, it is unlikely that such a system would result in further improvements in internal communication. Survey findings indicate the need for respondents to be better informed about the information available on their computers and how to access the information. The findings also indicate that there may be potential improvements in internal communication if an intranet is established. © 1998 IFIP, published by Chapman & Hall Ltd     

出国留学经历对跨文化交际情感因素的影响研究

跨文化交际情感因素是跨文化交际能力构成要素的重要组成部分,本文主要从文化偏见、焦虑、态度和移情四个方面来调查留学经历对跨文化交际情感因素的影响。研究结果表明国外留学经历有助于减少跨文化交际活动中的文化偏见和焦虑心理,同时也有利于培养交际主体对跨文化交际行为的积极态度和移情能力。     

The impact of electronic communication technology on written language

Communication technology is changing things. Language is no exception. Some language researchers argue that language is deteriorating due to increased use in electronic communication. The present paper investigated 100 randomly selected electronic mails （e-mails） and 50 short messaging system （SMS） messages of a representative sample of international students in University Putra Malaysia （UPM） to find out the impact of these two specific modes of electronic communication on written language use. The e-mails from UPM International Students Association （UPM-ISA） yahoo group were content analyzed. A non-probability convenience sampling was used to select the 50 short message services sent to the researcher about different subject matters by Malaysian and international students at UPM. Then, they were also content analyzed. The results indicated that the language used in students＇ e-mails and SMS messaging was full of spoken-like spelling, unconventional use of punctuation and abbreviations, and ungrammatical sentences. However, the more in-depth content analysis of the data revealed that the written language is being creatively adapted, developed, and enhanced to suit the conditions of the electronic communication age. Syntactical and lexical reductions are just strategies used to reduce effort, time and space.     

The physical placement of classroom technology and its influences on educational practices

The purpose of this study was to gain deeper insights into how technology restructures the classroom as a spatial setting and how the positioning of these technologies can be associated with educational practices. The research includes a photographic and schematic representation of 115 classrooms in 12 primary schools in Belgium, resulting in a typology based on structural features of the classrooms. Based on the typology derived and the specific positioning of technology, nine teachers were purposefully selected and interviewed regarding their perceptions concerning the link between the use of technology and the classroom layout. The results indicate that (1) the positioning of technology can be related to specific types of technology use; (2) the classroom layout is in transition from one central display to multiple screens; and (3) because of physical access to technology, the educational practice of individual classes is spatially dispersed over different locations within the school.     

Emerging influences of information technology on school curriculum

Just as information technology has improved effectiveness in medicine, finance, manufacturing, and numerous other sectors of society, advanced computing and telecommunications have the potential to help students master complex 21st-century skills. Research-based curriculum projects are developing examples of technologies that enable online virtual communities of practice using advanced tools to solve realworld problems. Learners engage in guided, reflective inquiry through extended projects that inculcate sophisticated concepts and skills and generate complex products. Pupils act as partners in developing learning experiences and generating knowledge, and students' collaborative construction of meaning is enhanced via different perspectives on shared experiences. Simulation and visualization tools help students recognize patterns, reason qualitatively about physical processes, translate among frames of reference, and envision dynamic models. These curricular approaches improve success for all types of learners and may differentially enhance the performance of at-risk students.     

数字图书馆建设研究

随着国家通信技术和网络技术等高新技术的飞速发展,我国电子商务环境已初步形成,目前已建成的ChinaNet、CERNet、CSTNet、ChinaGBN等网络都初具规模,为高校数字图书馆开展电子商务提供了良好的外部平台。数字图书馆是图书馆自动化的高级阶段,各种数字化技术初具规模;数字图书馆信息资源丰富,为生产新的信息产品和开展新的信息服务提供了可靠保证;对数字图书馆的用户来说,足不出户就可以查到自己所需的信息资料,利用电子商务方式可以享受到数字图书馆提供的各类增值信息服务,购买到各种信息产品,更大程度上满足了他们的信息需求。     

The communication of science and technology: Past,present and future agendas

Community learning of science and technology has undergone radical review in the past few years. This paper outlines changes that have taken place in research methods that have addressed the informal learning of science, particularly in the museum sector. We discuss the shift in perspective that has occurred over the past three decades in the public understanding movement, examine some current issues, and suggest future directions for research. The paper concludes with a personal vision for the future of community learning about science and technology.     

基于波束赋形技术的无线通信实验

为了让学生在实验课中了解下一代通信的核心技术,例如机器通信、新型空中接口、大规模多输入多输出天线阵列、波束赋形等,使教学内容紧跟科技前沿,对无线通信实验课程教学内容及实验流程进行了改革,给出实验系统的基本框架,提出了基于波束赋形的无线通信实验教学改进方案。     

The digital literacy debate: an investigation of digital propensity and information and communication technology

Research suggests students’ use of information and communication technology (ICT) may be more a matter of digital literacy and access rather than a generational trait. We sought to identify ICT preferences of post-secondary students (N = 580) through a Digital Propensity Index (DPI), investigating communication methods, Internet practices and the creation of online content. Age, gender and socioeconomic status were examined as factors which might explain why students use ICT. Results suggest age is a factor in ICT use but that it is not the most important consideration; the gender gap and gaps between socioeconomic groups in terms of ICT use may be closing. The findings raise a variety of implications for institutions training pre-service teachers, curriculum developers designing instructional materials and educational leaders developing ICT policy for schools.     

Linguistic influences on professional communication and recognition: A study of chemists and engineers in two Quebec universities

Linguistic influences on networks of professional communication and recognition among engineers at two Quebec universities were examined. It was hypothesized that chemists and engineers affiliated with the French medium University of Montreal and the Ecole Polytechnique would be less active in research and more likely to obtain scientific recognition locally and to feel professionally unrecognized outside Quebec compared to their colleagues at McGill University. The findings suggest that the localizing effects of using a medium of scientific training which is not the predominant language of international scientific communication and recognition (French) are ambiguous. Although chemists and engineers at the French medium institutions were less active researchers, their language of professional communication with other scientific communities was English and there was little sense of isolation.This research has been supported by grants from the Canadian Council and the Ecole Polytechnique of Montreal. The authors also wish to thank Miss Madeleine Palmer, Miss Daniella Quiniou and Miss Rosalba Casas for their help in data collection for this paper.     

Information and communication technology integration: Beyond the early adopters

Several ICT initiatives have failed to create systemic change in education. As outlined, a number of factors may account for this. For the potential of ICT to be widely realized beyond early adopting teachers, educators must be convinced that the resources enable them to do their jobs better and more efficiently. The major contributions of CITI and the Curriculum Navigator lie in their ability to provide strategies, resources, and planning functionality to achieve this goal.     

Adoption of information communication technology by teacher educators: one-on-one coaching

Abstract

Research evidence suggests teacher educators who role model the use of information communication technology (ICT) in their practice help their students build confidence and competence as ICT users. This research finding is also supported by feedback from Louisiana Tech University students in teacher education. Research also indicates that a number of factors impact the adoption of ICT in the practice of teacher educators. This research has examined one of these factors, namely the benefits of one-on-one coaching for teacher educators by technology coaches as they worked together to learn to use technology. Participants included 33 teacher educators from Louisiana Tech University and 14 pre-service teachers. The pre-service teachers served as technology coaches and worked with the teacher educators in their offices and classrooms as they learned to use technology for their personal benefit and to integrate technology into their teaching. Interviews and observations indicated that coaches as well as teacher educators benefited from the relationship and both groups increased their technology competency.     

高职通信技术专业实践教学改革探讨

本文分析了高职通信技术专业实践教学的现状,对高职通信专业实践教学环节存在的问题进行了分析,提出了一些改革的思路,目的在于提高增强学生对实践环节的学习兴趣,提高学生的实践能力、创新能力、职业能力。     

信息技术教学中的情感交流

课堂教学中,培养学生积极的学习情感,会使学生学习兴趣和信心倍增、智力活跃,从而主动参与认知活动。以"差生班"的授课情况为例,从"完善自我,用形象魅力吸引学生"、"借助网络‘关注’学生,架起师生情感交流的桥梁"和"领情入境,诱导学生求知情感"三个方面注重师生情感交流,以提高信息技术教学的有效性。