工业多媒体及分布式超媒体数据库     

赵士滨 《广东技术师范学院学报》1997,(4)

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。  相似文献   

移动电子商务的解决方案   总被引：1，自引：1，他引：1  

鲍克忠  储节旺 《情报科学》2002,20(9):976-979

本文介绍了移动电子商务的关键技术和爱立信，HP等公司的移动电子商务的解决方案。  相似文献   

无线互联时代的新商业模式—移动电子商务     

何绍华  林翔 《情报科学》2001,19(5):505-508

代表着无线互联时代的新商业模式－基于无线互联的电子商务正迅速成为业界的关注焦点。本文对移动电子商务的实现问题、服务内容以及运作模式进行详细阐述。  相似文献   

MICROTAB and the Teaching of Statistics     

MICHAEL F. FULLER 《Teaching Statistics》1988,10(1):12-15

  相似文献   

移动虚拟校园(MVC)的构思与实践   总被引：6，自引：0，他引：6  

崔光佐  陈虎  李树芳 《现代远程教育研究》2002,(4):29-32

移动教育已经成为现代教育技术应用的一个新方向，如何将移动计算技术应用于教育正在成为研究的热点。本首先探讨了移动计算技术的原理和特点，讨论了移动计算技术在校园建设中的作用，提出了移动虚拟校园（MVC）的概念，给出了其基本框架。同时，本还对该构架中的多项关键技术进行了研究并开发了多个实用的系统，并正在北京大学进行试用，目前运行效果良好。实践表明，移动虚拟校园在目前的技术条件下是可行的，并能发挥巨大的效益。  相似文献   

A theory of instruction for introductory programming skills     

Benjamin Xie  Dastyni Loksa  Greg L. Nelson  Matthew J. Davidson  Dongsheng Dong  Harrison Kwik 《Computer Science Education》2019,29(2-3):205-253

ABSTRACT

Background and Context: Current introductory instruction fails to identify, structure, and sequence the many skills involved in programming.

Objective: We proposed a theory which identifies four distinct skills that novices learn incrementally. These skills are tracing, writing syntax, comprehending templates (reusable abstractions of programming knowledge), and writing code with templates. We theorized that explicit instruction of these skills decreases cognitive demand.

Method: We conducted an exploratory mixed-methods study and compared students’ exercise completion rates, error rates, ability to explain code, and engagement when learning to program. We compared material that reflects this theory to more traditional material that does not distinguish between skills.

Findings: Teaching skills incrementally resulted in improved completion rate on practice exercises, and decreased error rate and improved understanding of the post-test.

Implications: By structuring programming skills such that they can be taught explicitly and incrementally, we can inform instructional design and improve future research on understanding how novice programmers develop understanding.  相似文献   

‘What is puberty,then?’ Smartphones and Tumblr images as de/re-territorialisations in an upper secondary school classroom     

Antti Paakkari  Pauliina Rautio 《Discourse: Studies in the Cultural Politics of Education》2019,40(6):873-888

ABSTRACT

In this paper, we explore the part mobile phone use plays in the capitalist assemblages present in school classrooms. Capitalism is approached through the continuous movement of de- and re-territorialisation. The empirical grounding is a wide study on mobile phone use conducted at an upper secondary school in Finland. The focus of this paper is one psychology lesson on puberty and the ways in which territories such as puberty are challenged in the school life of young people through their mobile phone use in class. Analysing a student’s Tumblr photo stream, we show how smartphones challenge the existing territorialities in a classroom. We locate three central deterritorialising movements: in relation to the physical space of the classroom; to the affective space of the classroom; and to the notion of body in puberty. We conclude that mobile phone use matters to students intimately and channels flows of capitalism at school.  相似文献   

The use of mobile devices as means of data collection in supporting elementary school students’ conceptual understanding about plants     

Zacharias C. Zacharia  Charalambia Lazaridou  Lucy Avraamidou 《International Journal of Science Education》2016,38(4):596-620

The purpose of this study was to examine the impact of mobile learning among young learners. Specifically, we investigated whether the use of mobile devices for data collection during field trips outside the classroom could enhance fourth graders’ learning about the parts of the flower and their functions, flower pollinators and the process of pollination/fertilization, and the interrelationship between animals and plants, more than students’ use of traditional means of data collection. For this purpose, we designed a pre–post experimental design study with two conditions: one in which participants used a mobile device for data collection and another using traditional means (e.g. sketching and note-taking). The sample comprised 48 fourth graders (24 in each condition), who studied the flower, its parts, and their functions. A conceptual test was administered to assess students’ understanding before and after instruction. Moreover, the students’ science notebooks and accompanying artifacts were used as a data source for examining students’ progress during the study's intervention. The conceptual test and notebook data were analyzed statistically, whereas we used open coding for the artifacts. Findings revealed that using mobile devices for data collection enhanced students’ conceptual understanding more than using traditional means of data collection.  相似文献   

移动IP网络环境下防火墙穿越的实现     

黄力 《柳州职业技术学院学报》2007,7(2):107-111

移动IP技术的出现使移动用户在Internet的海洋里自由翱翔。为了安全起见,企业和家庭网络都采用防火墙安全策略。在没有取得授权的情况下,移动用户无法访问企业或家庭的网络,一定程度限制了移动用户对网络资源的获取。本文提出一套基于外部代理的移动IP安全穿越防火墙的解决方案,方案设置一个移动节点,该节点可以从外部代理中获得一个授权地址,通过该地址实现与其家乡代理和通信对端的通信,在不修改协议和网络实体的情况下,利用IPSec协议实现防火墙的安全穿越和端到端的安全通信。  相似文献   

Learner presence,perception, and learning achievements in augmented–reality–mediated learning environments     

Yu-Hsuan Chen 《Interactive Learning Environments》2018,26(5):695-708

Although research has indicated that augmented reality (AR)–facilitated instruction improves learning performance, further investigation of the usefulness of AR from a psychological perspective has been recommended. Researchers consider presence a major psychological effect when users are immersed in virtual reality environments. However, most research on learner presence has focused on measuring it rather than the factors influencing it. This study explored the relationship between learner perception and presence in an AR-facilitated learning environment. A game-type AR learning process was developed and an experiment was implemented employing a one-group pretest–posttest method. Three sets of research instruments were developed, comprising a learning achievement test, a learner's presence inventory, and a questionnaire on learners’ perception of the AR-mediated environment. A total of 60 validated data samples were collected and statistically analysed. The researchers determined that learner presence closely relates to learning achievement and AR learning perception. These results indicate that a more satisfactory AR perception leads to a higher level of learner presence in the AR environment, thereby resulting in more beneficial learning outcomes.  相似文献