Design and evaluation of online multimedia maintenance manuals

Maintenance in production environments is becoming increasingly complex as machines become more technologically advanced and need less maintenance. As a result, maintenance personnel face more difficult tasks. At the same time the maintenance engineers obtain less experience with the tasks. In this context, online multimedia manuals are thought to give better support for searching information and expressing complex interactions with physical objects than paper manuals. Three prototypes were designed and formative evaluated in an industrial environment. The evaluation of the first prototype showed that maintenance engineers encountered serious problems with the online multimedia manual, as they omitted crucial steps in the task. The second prototype addressed this problem. The third prototype addressed a problem observed in the second prototype when subjects switched between the online manual and the machine controls.     

基于XML的在线多媒体课件设计与实现

简要分析了现有的课件存在的问题,提出了一种可扩展的基于XML的在线多媒体课件层次信息模型,利用XML语言定义了课件标记语言对该模型进行XML绑定,通过ASP代码成功把XML引入了课件标记文档中,并利用XSL的解析器来解析转换,实现了能在浏览器中表现的在线多媒体课件库系统.通过现有的技术可实现基于XML的在线多媒体交互教学是行之有效的,而且符合CELTS内容包装规范.从而有效地解决了多媒体课件网络化过程中出现的一些问题.     

浅谈多媒体教室的基本维护

随着我国教育事业的快速发展,各学校都在实行多媒体教学,多媒体教学可以让课堂更生动起来,但同时对多媒体教室的维护工作是一个要面临的课题,本文结合多媒体教室的一些经验对教室的基本维护进行一些探讨。     

Design and evaluation of a multimedia storage server for mixed traffic

The relative simplicity of access to digital communications nowadays and the simultaneous increase in the available bandwidth are leading to the definition of new telematic services, mainly oriented towards multimedia applications and interactivity with the user. In the near future, a decisive role will be played in this scenario by the providers of interactive multimedia services of the on-demand type, which will guarantee the end user a high degree of flexibility, speed and efficiency. In this paper, some of the technical aspects regarding these service providers are dealt with, paying particular attention to the problems of storing information and managing service requests. More specifically, the paper presents and evaluates a new storage technique based on the use of disk array technology, which can manage both typical multimedia connections and traditional requests. The proposed architecture is based on the joint use of the partial dynamic declustering and the information dispersal algorithm, which are employed for the allocation and retrieval of the data stored on the disk array. We also define efficient strategies for request management in such a way as to meet the time constraints imposed by multimedia sessions and guarantee good response times for the rest of the traffic. The system proposed is then analyzed using a simulation approach.     

Deep learning-based automatic annotation and online classification of remote multimedia images

Multimedia Tools and Applications - In this paper, based on in-depth analysis of remote multimedia images, the automatic annotation and classification of graphics are tested and analyzed by...     

Design and evaluation of an adaptive incentive mechanism for sustained educational online communities

Most online communities, such as discussion forums, file-sharing communities, e-learning communities, and others, suffer from insufficient user participation in their initial phase of development. Therefore, it is important to provide incentives to encourage participation, until the community reaches a critical mass and “takes off”. However, too much participation, especially of low-quality can also be detrimental for the community, since it leads to information overload, which makes users leave the community. Therefore, to regulate the quality and the quantity of user contributions and ensure a sustainable level of user participation in the online community, it is important to adapt the rewards for particular forms of participation for individual users depending on their reputation and the current needs of the community. An incentive mechanism with these properties is proposed. The main idea is to measure and reward the desirable user activities and compute a user participation measure, then cluster the users based on their participation measure into different classes, which have different status in the community and enjoy special privileges. For each user, the reward for each type of activity is computed dynamically based on a model of community needs and an individual user model. The model of the community needs predicts what types of contributions (e.g. more new papers or more ratings) are most valuable at the current moment for the community. The individual model predicts the style of contributions of the user based on her past performance (whether the user tends to make high-quality contributions or not, whether she fairly rates the contributions of others). The adaptive rewards are displayed to the user at the beginning of each session and the user can decide what form of contribution to make considering the rewards that she will earn. The mechanism was evaluated in an online class resource-sharing system, Comtella. The results indicate that the mechanism successfully encourages stable and active user participation; it lowers the level of information overload and therefore enhances the sustainability of the community.     

分布式航空维修质量综合评价系统设计与实现

详细阐述了灰色关联度分析理论在航空维修质量评价中的应用,提出了开发基于Intranet的分布式航空维修质量综合评价系统（简称DCEAMQ系统）的设计方案和实现方法。     

Studying online: evaluation of an online study environment

This study evaluates student use of an online study environment. Its purposes were to (1) determine if college students will voluntarily use online study tools, (2) identify characteristics of users and nonusers of the tools, and (3) determine if the use of online study tools relates to course achievement. Approximately 25% of students used the online tools for more than one hour before each of three examinations. In comparing use of the study tools provided, the largest number of students made use of the online lecture notes and the greatest amount of online study time was devoted to reviewing multiple choice questions. The perceived ease of access to the Internet differentiated tool users from nonusers. Study tool users scored higher on course examinations after accounting for measures of ability and study skill.     

The evaluation of online courses

Abstract Given the special characteristics of online courses, their quantitative/qualitative evaluation calls for the adoption of specific procedures to assess both the learning process and the participant performance. This paper seeks to shed light on the aspects and issues involved in the evaluation of online courses, focusing on the peculiarities that distinguish such evaluation from that of traditional distance education. Subsequently, a methodological approach will be proposed that was developed and tested during evaluation of online courses for in‐service teacher training and for training of staff in small and medium‐sized enterprises.     

多媒体教学课件的设计制作及应用

计算机技术、多媒体技术、互联网技术的发展丰富了计算机辅助教学(CAI)的手段,作为计算机辅助教学应用于课堂教学最常见的表现形式——多媒体教学课件应运而生.介绍了不同用途的多媒体课件类型和一般制作方法,对使用Microsoft PowerPoint软件制作的课堂教学类PPT课件展开详尽探讨,结合作者实际教学经验,总结归纳了教学课件的设计和制作应遵循的原则、课件制作技巧以及在艺术处理上应注意的问题,同时对课件的应用提出了建议.     

多媒体教学系统的设计与实现

为了给多媒体教学提供良好的网络环境,提升教学效果,提高学生积极性,根据传统教学与多媒体教学的不同,整合教学资源,设计、开发了基于网络的多媒体教学系统.此系统由视显文件配置、直播录制、用户管理、设备管理、授课管理与导播切换六大模块构成.该系统的建成,可加强学生间以及师生间互动,增强辅导学生的实时性,提升教师授课内容的丰富...     

多媒体远程教学系统的设计与实现

利用B／S模型开发了多媒体大学语文远程教学系统,文章针对大学语文课程的特点从教改实践的分析入手,探讨了软件的设计思想、结构特点及相关的制作方法,并提出了网上在线动态组卷的实现方法。     

Investigating response time and accuracy in online classifier learning for multimedia publish-subscribe systems

Multimedia Tools and Applications - The enormous growth of multimedia content in the field of the Internet of Things (IoT) leads to the challenge of processing multimedia streams in real-time....     

基于固态硬盘的在线全文索引管理策略研究

为解决基于固态硬盘的全文检索系统的在线索引管理问题,首先分析了现有的基于磁盘的索引管理策略,指出传统索引方法会造成固态硬盘的过分损耗,并不适用于固态硬盘.然后提出了一种针对固态硬盘的在线索引管理方法:基于分块的部分合并.该方法避免了对固态硬盘有害的索引原地更新,并以固态硬盘高速随机读取的特点为基础,通过减少不必要索引合并减轻固态硬盘的负担.实验结果表明,该策略不仅具有优越的索引与检索性能,还大幅减少了固态硬盘的损耗.     

Design of a multimedia object-oriented DBMS

The emerging multimedia information (such as video, image, voice, graphics) services have imposed many new requirements and research considerations on the design of database management systems (DBMSs). Conventionally, a multimedia DBMS is designed by developing a multimedia presentation layer on top of a pre-existing object-oriented DBMS (which can be truly object-oriented or relational-based), such that the core of the DBMS was developed earlier independent of the design of the multimedia presentation layer. Due to the fact that multimedia capabilities are not actually embedded in the DBMSs, such systems tend to provide only a rather limited set of functionalities in multimedia and are not satisfactory in supporting multimedia applications. This paper describes some key features of a multimedia object-oriented DBMS that is currently being developed. In this system the DBMS is carefully redesigned to provide special multimedia capabilities, such that the mismatch between the DBMS and the multimedia application layer can be eliminated. In particular, this paper will focus on unique multimedia capabilities including multimedia object modeling, video data management, and distributed collaboration. This project was supported in part by Rome Laboratory, U.S. Air Force under the contract no. F30602-94-C-0090     

Design and implementation of a multimedia CSCW platform

In this paper, a generic four-layer framework for computer supported cooperative work (CSCW) is proposed. With clear separation of functionalities in each layer of the framework, application developers could implement their specific CSCW applications easily. Based on the four-layer framework, the architecture of a general purpose CSCW platform is designed and implemented with the necessary functionalities to help the collaborations among group members. To provide the system with more features and user friendliness, multimedia processing and transmission capabilities for audio and video are incorporated into the platform. Features like application-sharing, group decision support, multimedia mail transmission, etc., are well implemented in the platform. Moreover, an efficient network transport protocol, called VXTP, is designed and implemented to avoid the transmission overhead of conventional TCP. The performance measurements using both VXTP and TCP are given in the paper for comparison. Lastly, compared with other CSCW systems, our design achieves greater flexibility and portability by adopting the generality philosophy in the framework.