Data Compression in Information Technology——High Speed Sampling Theorems

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Initiation in Audio – Visual Communications

Teaching audio-visual communications

Dealing with audio—visual communications and, in the broader sense, communications as a whole, is a subject which has been taught in French schools for many years. It has aroused interest in many neighbouring countries such as Spain, Portugal, Italy and Germany, and also in countries as far away as Quebec, Panama, the Ivory Coast and Kuwait.     

Perspectives in Science — Exploring Science,Technology and Society

Abstract

The National Film Board of Canada is breaking new ground in educational technology with a pilot series of ‘interactive’ videos entitled Perspectives in Science. The series, aimed at the junior high school level, addresses issues of environmental and sociological concern not traditionally dealt with in formal science curricula. This paper examines the rationale behind the development of the Perspectives in Science video series. Science curriculum guidelines across Canada are being re‐written to reflect a change in education strategies that will encompass not only the teaching of scientific concepts, but also the applications of those concepts, as well as the implications of utilizing those concepts. Referred to as the ‘S‐T‐S’ connection, or, Science‐Technology‐Society, the new focus has been extensively documented by the Science Council of Canada and is currently causing a stir in the science teaching community as teachers scramble to find audio‐visual productions that address these new concerns and, at the same time, engage their students.

This paper also explains the design concept for presenting materials on S‐T‐S in an interactive model. Each video includes a short, open‐ended drama, followed by a number of ‘interactive components’. The tapes are ‘interactive’ in that teachers and students can choose to follow the material linearly or search for specific segments using the running time code as an electronic page reference. The interactive components consist of documentary style discussions with Canadians involved in some aspect of the scientific, technological, and societal issues presented, animated sequences, experiments, and filmography. The videos investigate issues of water, biotechnology, and toxic waste—with additional topics on soil, forestry, and air in production.

Finally, this paper documents the formative evaluation of the series noting the favourable response of teachers and students to the design concept and material content. The findings of this research indicated that the interactive video was both timely and appropriate for science teaching in view of major changes now being made to science curricula.     

Technology in education: Research and development in the project ‘Physics and Technology’

Summaries

English

The diagnosis of pupils’ misconceptions and the identification of reasons for such misconceptions must be considered the prerequisite for helping the pupils to develop correct scientific conceptions. In the present study, an attempt was made to investigate student teachers’ competency to diagnose pupils’ answers for possible misconceptions. It was found that student teachers are, by and large, not capable of making appropriate diagnoses of misconceptions. In view of this, it is suggested that in science teacher‐training programmes specific training activities be included which are designed to develop the desired diagnostic competence.     

Water Environment Pollution in Three—Gorge Reservoir Area and Treatment Technology

After the erecgtion of Three-Gorge Reservoir,The Water Environment in the reservoir area will be turned into water dobies like laker,and the self-clarification ability of water will also be moch slower than ever,Now,the quality of water in most segments in upper reaches of Yangtze River cannot meet the requiremets of I-II class Environment Quality Standard (GHZB1-1999),In Yangtze River,Jialing River and Wujiang River,the mian indexes such as colon bacillus,nonionic ammonia,chemical oxygen demand(COD),petroleum,phenol,total phosphorus(TP),heavy metal,etc.,have exceeded the standard limits.The water bodies of the reservoir area are facing serious risk of eutrophicatioinm.To solve that problem.A countermeasure of multi-spot diverted treatment and separate discharge is recommended,for doing this,lots of smallscale wastemwate treatment facilities employing updated activated sludge treatment technologies are to be set up.Up to now,a number of sewage treatment technologies to control eutrophication of water have been developed,which include processes of sequencing batch activated sludge(SBR),absorbing bio-degradation (AB),oxidation channel,package intermittent aeration system(PIAS),intermittent cylce extended aeration system(ICEAS),UNITANK and so on ,The Efective one to be applied in the reservoir area should convey the requirements of ecological agriculture,forestry and urban planning ,and be accompanied by legal support for appropriate exploitation of natural resources.     

Future Trends in Fruit Postharvest Technology

环境保护、安全性、消费者的需求取向以及经济回报是果实采后操作技术研究及其商业应用必须考虑的关键因素．论述了气调贮藏、拮抗性微生物防治采后病害、热处理与致离子辐射、可食性被膜、非破坏性果实内质测定以及工程等果实采后技术重要领域的研究现状与未来趋势     

Achieving Efficient Channel Utilization for Data Communications in IEEE 802.11 WLAN

In the IEEE g02. 11 protocol, the adoption of the exponential backoff technique leads to throughput performance strongly dependent on the initial contention window size and, most importantly, on the number of contending stations considered in the network. This paper proposes a simple but accurate method to dynamically estimate the number of contending stations in a wireless local area network （ WLAN ）. Based on estimation, all the mobile stations dynamically adjust the initial contention window in medium access control （ MAC ） layer to avoid collisions. The simulation results show that the proposed algorithm can achieve efficient channel utilization, higher system throughput, and better fairness performance.     

Media and Violence: Does McLuhan Provide a Connection?

School shootings publicized worldwide inevitably awaken the debate about contemporary communication media and violence. It is often conjectured that regular exposure of young people to countless acts of aggression in contemporary popular media leads them to become more aggressive and, in some cases, to commit violent crimes. But is this claim valid? Media guru Marshall McLuhan argues that it is not so much the content of such media that incites aggressive actions as the sociostructural conditions they bring into being. In this article, Jane O'Dea draws on the cultural context of postmodernity and on Jean Baudrillard's thought to explore and critically assess the validity of the linkage McLuhan proposes, identifying the kinds of questions, inquiries, and educational implications it potentially raises.     

Translator’s Subjectivity in Science and Technology Translation

Science and technology translation involves various industries and professions,with its own system of terminology and unique language features.For a translator,who is not a professional scientist or technician,it seems to be difficult to do science and technology translation accurately and properly.Consequently,it is necessary for the translator to give play to his subjectivity when translating science and technology documents or related interpretation:searching for related data to replenish necessary professional knowledge,consulting with professional technicians actively to clarify the jargon and common sayings,and thinking critically to scrutiny the source text.     

Decision‐Making in Future Science and Technology Curricula

Summaries

English

In this article, the author argues in favour of a decision‐making orientated science and technology curriculum for secondary school students. To achieve this, the curriculum should (i) expose students to open‐ended problems within their natural setting, (ii) provide students with real decision‐making situations and (iii) involve them in scientific‐technological social actions, e.g. in community institutions or industrial plants.     

Technology enhanced learning in programming courses – international perspective

Technology enhanced learning (TEL) is increasingly influencing university education, mainly in overcoming disadvantages of direct instruction teaching approaches, and encouraging creativity, problem solving and critical thinking in student-centered, interactive learning environments. In this paper, experiences from object-oriented programming (OOP) courses that are taught in three institutions from three different European countries are presented and compared. The courses are based on Java and are delivered in the second year of studies, after students have attended an introductory programming course. The emphasis is given on TEL approaches and accompanying tools and services, focusing mainly on Learning Management Systems (LMS). Our students completed an appropriate questionnaire to evaluate the importance and utilization of TEL services that are used or planned to be used at the programming courses. The results of statistical analysis of collected data show that students from all three institutional groups consider organizational services provided by TEL tools as much or very much important in their education, while communicational services are rarely used. Using non-parametric statistical tests we studied the similarities and differences in perceived importance of TEL services among students from different institutional groups.     

Graduates’ Reflections on an Online Doctorate in Educational Technology

In recent years online education doctorates have become more prevalent to accommodate the growing need for distance academic preparation. Due to the newness of these degree programs, there is a dearth of information in the literature on learner perspectives of effective online teaching and learning strategies. The authors of this paper are recent graduates of the online Doctor of Education program in Educational Technology at the University of Florida. They convey their own experiences using supporting research and the three components of the Community of Inquiry (CoI) model (Garrison, Anderson, & Archer, 2000)—social, cognitive, and teaching presence—to examine this online doctoral program. The insights in the paper are intended to promote dialogue on the student perspective and make recommendations to further the initiation and development of online education doctorates.     

School Environment and Technology Implementation in K–12 Classrooms

The purpose of this study was to examine teachers’ perceptions of their school environment in terms of factors that enhance or prohibit the use of instructional technology. The study also investigated whether the technology implementation environment varied for schools at different locations and different levels. Both quantitative and qualitative data indicated that the most serious problem in K–12 technology implementation was time constraints, followed by technical problems that could not be taken care of in a timely manner. Suburban schools had the most favorable conditions in all aspects of technology implementation support. No significant differences were found between school levels.     

Wearalble Technology——Oxflord S2Ao Unit 5o More reading

课题:Wearable technology 教学目标: ①认知目标是培养学生分析课文框架思想,初步理解穿戴科技目前和未来在现实社会的应用. ②能力目标注重帮助学生理解课文的写作风格及培养学生的思维想象能力. 教学过程:     

Technology utilisation in elementary schools in Turkey’s capital: a case study

A case study was conducted to explore teachers’ current technology use in elementary schools in Ankara, the capital of Turkey. The data were collected through a survey, and participants included 1030 classroom teachers across eight districts. The present study results revealed that significant challenges remain with regard to technology use in the classroom, even in the capital of Turkey, where teachers have advantages in terms of technology access and use compared to rural areas. The participant teachers used technologies most frequently for lesson preparation activities, rather than for delivering instruction. Although the teachers felt that school principals and colleagues were usually supportive of technology use in lessons, they complained about insufficient professional development activities and incentives. Representing a snapshot of teachers’ technology use in elementary school settings, this study sheds light on essential factors that should be considered in any technology integration process in schools. The study findings offer valuable insight for policy-makers and school leaders on how to support the technology integration process and allocate money for technology initiatives.     

Technology‐loving Luddites? Declining participation in high school computing studies in Australia

The research discussed in this article is based on an Australian Research Council‐funded study carried out over three years (2005–2007) in three states ¹ 1. New South Wales, Victoria, and South Australia View all notes in Australia. The study sought to understand students’ experiences and decisions at secondary school to ascertain why few girls choose to enter tertiary‐level Communication and Information Technology (CIT) courses, and what strategies could be implemented in schools to remedy this problem. The results suggest that while boys still tend to dominate the higher levels of CIT subjects in Australian high schools across the three states, there was also a general decline in participation at all levels. Drawing on qualitative and quantitative data, the article examines patterns and explanations regarding the nature of participation in CIT subjects. The article develops a Luddite analysis in order to understand the strong rejection of this area of study in the three Australian states.