Application of Courseware Based on Information Retrieval Technology
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PAPER APPLICATION OF COURSEWARE BASED ON INFORMATION RETRIEVAL TECHNOLOGY Application of Courseware Based on Information Retrieval Technology http://dx.doi.org/10.3991/ijet.v11i03.5346 Aili Qi1, Yunsong Wang2, Chengchun Shen1 1 Guizhou University of Engineering Science, Bijie, China 2 Guizhou Minzu University, Zunyi, China Abstract—distance teaching has become one of the im- courseware retrieval method on the basis of ontology, and portant approaches for people to acquire knowledge. How- the courseware retrieval method can be used in distance ever, due to time limit, it is very difficult for people to spare teaching. Yuan et al. [5] designed Solar-based multimedia much time from work and life on distance teaching. Besides, teaching courseware cloud retrieval system. This system there are numerous employees who have mastered some achieved efficient and flexible courseware cache, online knowledge in their fields, so it is unnecessary to complete all retrieval, duplication checking and highlight display func- courses of distance teaching. Thus, retrieval knowledge tions and improved usability through index duplication. acquisition becomes very crucial. The author proposed a Yan et al. [6] designed ontology-based courseware re- courseware teaching system with retrieval function which source retrieval system by combining ontology and Agent effectively solves courseware retrieval, based on multimedia technology. It provided individualized courseware retriev- information such as image, audit and video. The author al service, achieved courseware resource sharing, boosted applied this system in actual teaching of “Sports Psychology” courseware making efficiency and reduced teacher’s pres- course. This course gained favorable teaching effect, and sure of courseware making. Existing researches solve the improved students’ learning efficiency and learning effect as problem of massive courseware information retrieval to well as their initiative and enthusiasm for acquiring some extent. But they fail to fundamentally resolve fun- knowledge. damentally retrieval problem in distance teaching and especially fail to effectively settle courseware retrieval Index Terms—courseware, teaching, information retrieval, problem based on image, audio and video. The author put Sports Psychology forward a courseware teaching system with retrieval func- tion, applied it in actual teaching of “Sports Psychology” I. INTRODUCTION and gained favorable teaching effect. Sports Psychology is a branch of psychology which aims to study human psychological characteristics and II. INFORMATION RETRIEVAL TECHNOLOGY laws during engaging in sports. Sports Psychology as an A. Basic concept of information retrieval emerging subject in sports science, is closely related to Sports Science, Sport Sociology, Exercise Physiology, The full name of Information Retrieval [7] is “Infor- Sports Training Theory and Method as well as theories mation Storage and Retrieval”. Information retrieval refers and methods of other sports. Moreover, it is an essential to a process of organizing and storing of information ac- course of PE specialty [1]. This course mainly narrates the cording to certain method and finding out relevant infor- effects of cognition, emotion, will and individuality on mation according to users’ needs [7]. physical exercise. It analyzes people’s psychology in B. Principle of information retrieval sports skill formation process, training process, competi- tion process and guides athletes how to master good psy- Information retrieval is divided into two parts: infor- chological skills and mentality. Stolz and Pill suggested mation storage and information retrieval. In information the teaching of PE course including Sports Psychology storage process, it is necessary to carry out information should be combined with sports games [2]. This teaching screening for information source, transform information experiment result shows that such teaching mode is wel- and storage information into database in accordance with comed by students. predefined unity concept. In information retrieval process, the system transforms retrieval request to retrieval lan- With continuous development of network and multime- guage according to predefined unity concept, retrieve and dia information, distance teaching has become one of the feedback retrieval results. important approaches for people to acquire knowledge. However, due to time limit, it is very difficult for people C. Text information retrieval to spare much time from work and life on distance teach- Text information retrieval, also called natural language ing. Besides, there are numerous employees who have retrieval, refers to a technology of word matching, seeking mastered some knowledge in their fields, so it is unneces- in natural language directly through the computer without sary for them to complete all courses of distance teaching. any indexing of literature. The earliest and most typical Thus, retrieval knowledge acquisition becomes very cru- text retrieval is book index of a library. The books are cial. Smeaton [3] designed a set of document retrieval indexed according to book’s name, author, publishing system which achieves courseware retrieval, based on house, publishing time and book number. Readers can language processing framework. Mittal et al. [4] applied seek the books they want according to the index. content classification representation to design a set of 32 http://www.i-jet.org PAPER APPLICATION OF COURSEWARE BASED ON INFORMATION RETRIEVAL TECHNOLOGY File Night” Global text Night” Form 1 Form 2 Form 3 Form 4 Image Image Form 5 Form 6 Form 7 Form 8 Title: Night” Field 1 Field 2 Field 3 Field 4 text field 1 text field 2 Figure 1. Example of multimedia information element subdivision D. Multimedia information retrieval The courseware information is decomposed into In content-based multimedia information (such as im- three kinds of information, text, image and audio age, speech and video) retrieval, the color, texture, shape, motion and other visual features as well as audio features are extracted to characterize semantics of multimedia Establish the relationship between the content so as to realize query and management of multi- information and the time media data. Figure 1 shows an example of hierarchical storage of multimedia file. Multimedia file is divided into several multimedia element domains to achieve retrieval To collate information in time and to associate with the search keywords positioning. Figure 2. Schematic diagram of multimedia courseware information III. INFORMATION RETRIEVAL TECHNOLOGY storage process The implementation of courseware teaching system with retrieval function depends on scientific information Select a course storage and retrieval process design under the help of audio/video information separation, speech text infor- mation conversion and information synchronization meth- od. User information retrieval A. System process design In this experiment, the retrieval process of courseware Retrieve text, image, and audio information teaching system with retrieval function can be divided into: courseware information storage process and courseware information retrieval process, as shown in Figure 2 and Figure 3. Combine text, image and audio information In multimedia courseware information storage process, courseware information can be classified into three types (text, image and audio) according to different courseware Retrieval of multimedia courseware to users information component elements. Text information may come from textbook, PPT courseware, note and black- Figure 3. Schematic diagram of multimedia courseware information board writing etc.; image information may come from retrieval process classroom teaching video and PPT courseware etc.; audio In multimedia courseware information retrieval process, information may come from classroom teaching record- users choose a course they are interested in, the system ing, music and classroom teaching video etc. The three will acquire relevant information of the course and display types of information are stamped with timestamp accord- it. Users further retrieve, and the system acquires ing to time sequence of course teaching to make text im- courseware-related text, image and audio information age and audio information establish relevance with time. according to the retrieval. It integrates the three types of Then, the three types of information are segmented on the information according to time relationship to form users’ basis of teaching content, and segmented elements are multimedia courseware information and present it to us- connected with possible key words for retrieval for the ers. sake of retrieval. iJET ‒ Volume 11, Issue 03, 2016 33 PAPER APPLICATION OF COURSEWARE BASED ON INFORMATION RETRIEVAL TECHNOLOGY B. Audio/video information separation method are integrated at the client according to the timestamp. As previously mentioned, we will encounter the need of This avoids possible non-synchronization problem in separation of audio information from the video in multi- transmission process and achieves text, image and audio media courseware information storage process. courseware information synchronization at client. Because of information technology progress, relevant E. System interface design techniques about extraction of audio signals from video In terms of page navigation, traditional distance course file have become quite mature. Power Video Converter, platform navigation style is followed. The list is applied to Total