浅谈教师如何灵活运用数字影像技术

数字影像作为一种动态的媒体资源,在教学中起着重要的作用,就数字影像在优质课例资源建设和多媒体CAI教学在的运用进行了探讨。     

图像置乱技术综述

概述了图像置乱方法的产生和分类,分析了几种典型的置乱算法的原理,在此基础上,阐述了图像置乱中的关键技术.     

Ninth graders' attitudes towards selected uses of technology

Technology has become affordable and available for science teachers of all grade levels. This study presents the results of collecting attitudinal data from over 240 ninth grade physical science students prior to the integration of technology into their science curriculum. The data were evaluated utilizing a probabilistic model, which corrects for the nonlinearity of rating scale responses. Results indicate that surveyed students, on average, were supportive of the integration of a wide range of technology into their classroom. Although students were generally positive, they were statistically more supportive of activities that involved the sending of electronic messages to other students when a comparison was made to their attitudes toward the collecting of data with computer probes. The results suggest that physical science teachers may want to initiate the integration of technology into classes by first requiring students to use electronic mail to share data collected without the aid of a computer. This activity could, in turn, be followed by labs that require the collecting of data with computer probes and subsequent sharing of that data with other students through electronic mail.     

基于设备的维修方法和技能培养

本文探讨了设备在使用过程中出现的问题和故障,如何采用一定的技术手段和维修方法,恢复设备正常使用。并介绍了在实际维修工作中一些具体的经验和技巧,同时对技术人员提高维修技能和业务水平也提出了要求。     

小波与视频图像压缩技术探讨

小波基的时频局部化特性和小渡变换的多尺度展开结构使得基于小波的图像／视频压缩编码不仅具有良好的率失真特性,而且更容易实现压缩码流的全伸缩特性,基于小波的图像／视频压缩编码在未来将会显示出技术优越性。小波图像压缩新技术的研究,目前和未来很长一段时间仍将是图像和视频压缩应用研究的热点。     

高等学校与科技创新

当今世界，科技因素越来越成为提升国家竞争力和综合国力的战略性资源和决定性因素，科技进步与创新越来越成为经济社会发展的主导力量。世界各国为抢占创新制高点展开了激烈角逐，并随着科技经济一体化进程的不断加快，这种竞争愈演愈烈。处于这种激烈竞争大环境中的我国，为了中华民族的伟大复兴和全面建设小康社会，坚定不移地实施科教兴国和可持续发展战略，抓紧实施国家创新体系，大力推进科技创新。在继国家经贸委推出技术创新工程和中国科学院推出“知识创新工程”之后，国家教育部也准备启动科技创新工程。在新一轮科技创新热潮中，…     

Exploring Electronic Landscapes: Technical Communication, Online Learning, and Instructor Preparedness

Instead of focusing on technologies of online delivery, specific course design, or reporting on the successes or lessons learned of an online or distance education course, in this essay I focus on the readiness of technical communication teachers for teaching in online settings. Using ideas gleaned from cultural geography, specifically the concept of reading and interpreting landscapes, I develop a framework for instructors to determine their willingness, readiness, and preparedness to teach online. The final section of this essay provides an example of using this framework based on my explorations into my readiness to teach online. I find that self-selection for online instruction is a critical step in developing powerful instructional settings and allows technical communication teachers to cross or remove existing boundaries within their own pedagogical practices.     

Exploring Electronic Landscapes: Technical Communication,Online Learning,and Instructor Preparedness

Instead of focusing on technologies of online delivery, specific course design, or reporting on the successes or lessons learned of an online or distance education course, in this essay I focus on the readiness of technical communication teachers for teaching in online settings. Using ideas gleaned from cultural geography, specifically the concept of reading and interpreting landscapes, I develop a framework for instructors to determine their willingness, readiness, and preparedness to teach online. The final section of this essay provides an example of using this framework based on my explorations into my readiness to teach online. I find that self-selection for online instruction is a critical step in developing powerful instructional settings and allows technical communication teachers to cross or remove existing boundaries within their own pedagogical practices.     

基于本体的图像语义检索关键技术实现

本文跟随当前语义网以及本体技术的发展潮流,在研究分析图像语义检索技术后,设计出一棵图像语义资源描述树作为新的一种图像语义描述模式,以此构建基于本体的图像语义检索模型,提出一个基于支持向量机技术的图像语义提取标注的改进方法。     

Gender differences in attitudes towards learning oral skills using technology

This paper reports a quantitative study on gender differences in attitudes when learning oral skills via technology. The study was conducted at Tafila Technical University, Jordan, with 70 female and 30 male students, to find out if female students are better and faster in learning a language than male. Specifically, it seeks to investigate differences in attitudes between females and males in terms of practicality, confidence and anxiety. The results of the study show that there were no significant differences between female and male students when comparing the pre- and post-test mean scores. Both genders establish the same levels of attitudes before and after undergoing this course, which suggests that the exposure to language learning using technology did not contribute to any significant gender inequality. The paired sample t-test results showed improved attitudes toward learning oral skills in both females and males. The study also indicates female and male improvement in the anxiety dimension showing that their initial strong apprehension toward this course was greatly reduced at the end of the course. In terms of confidence, female showed better enhanced confidence level than male at the end of the course.     

Instructor Social Presence Effects on Learner Social Presence,Achievement, and Satisfaction

Instructor social presence involves instructors establishing their presence as “being there” in terms of frequency of communication and interaction with students as well as supporting students throughout the learning process (Lowenthal 2015). Instructor social presence can be constructed and maintained through the design and facilitation of online courses. Studies have indicated that instructor social presence can be correlated with increased learning satisfaction, engagement and achievement as well as learners perceptions of the instructor. This sequential explanatory mixed method study investigated the effects of instructor social presence on achievement, satisfaction and learner social presence and further sought to identify effective instructor social presence techniques in asynchronous online courses. The results of this study showed that the degree of instructor social presence significantly influenced instructor perceptions of student achievement. Findings also suggest that a well-designed collaborative learning activity can be an effective strategy for building instructor social presence.     

The NonMSW Task Supervisor,MSW Field Instructor,and the Practicum Student

Abstract

This paper adds to the literature on field instruction and supervision of social work practicum students by nonMSW professionals. It shares insights gained from a focus group discussion of professionals' experiences with practica when there was no MSW on site. Reported findings indicate student, agency, and relational characteristics contribute to the success of these placements. The focus group and the authors conclude that active involvement of all three parties -the on-site nonMSW supervisor, the off-site MSW field instructor, and the practicum student -in a triad model of field education increases the likelihood that these practica provide students with field learning experiences that are among the very best.     

科技英语文体中动词形态的用法及翻译

科技英语文体动词形态的应用变化极为广泛，探求动词形态在科技英语中的用法和翻译对领会掌握科技英语有着重要作用．文章就常见动词形态的用法和翻译作了深入辨析，以便于语言学习者更好地了解科技英语的特点及应用，为翻译应用科技英语奠定坚实的基础．     

改进的灰度图像的骨架提取与重建算法

数学形态学是一种非线性的处理信息的工具,它是一种建立在集合论和形态学上的对图像进行分析理解的工具,数学形态学主要有四个算子:扩张、腐蚀、开启和闭合。该文把灰度图像函数映射成二值图像以后,基于数学形态学理论,提出一种灰度图像的骨架提取和重建算法,并取得非常好的效果。