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In this paper, ULearn (University of Surrey learning on-line) and e-learning techniques are used to enhance the students’ understanding and participation in Dynamics modules for an undergraduate programme in the School of Engineering, University of Surrey. The Dynamics modules are taught at Levels 2 and 3 and contain several mechanisms and vibrating systems. The modules consist of several chapters, each of which has its own folder, or content file, in ULearn. In addition to the discussion board and chat room, on-line simulations have been made available and integrated within ULearn. In order to evaluate students’ understanding and encourage the student participation in ULearn, timed on-line assessments, in the form of multiple-choice quizzes, have been designed. The feedback of the students has indicated that the use of ULearn was of great help to improve their understanding of the Dynamics modules.  相似文献   
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Notes and Reviews

Some recent Unesco publications  相似文献   
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The prominent perceived professional needs of 365 Jordanian and 1,162 Malaysian secondary-level science teachers were examined using the Science Teacher Inventory of Need. These were compared across subgroups of the respective samples and across the two samples. The Jordanian science teachers' needs were in the areas of delivering science instruction, managing science instruction, administering science instructional facilities and equipment, and improving one's competence as a science teacher. The Malaysian science teachers' needs came from those four areas plus the area specifying objectives for science instruction. Needs from the first four areas were shared across the two samples. These needs were similar to ones observed in U.S. samples. The reason for the similarities is questioned.  相似文献   
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This study explored the value of providing Introductory Accounting distance education students with feedback via a computer‐based learning (CBL) package modelled on teacher dialogue. CBL provided tightly focussed feedback without increasing the materials’ complexity ('element interactivity'), and without redundant feedback, while ensuring the learners engaged with the materials at an optimal ('germane') mental processing level. The CBL feedback provided verification and elaboration at key points. The CBL was used to complement written learning materials. The students using CBL performed significantly better than the total group. The students found the CBL materials useful, but ranked the written materials higher than CBL. Both student preferences and learning results indicated the value of CBL feedback.  相似文献   
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Tāhā Hussein     
Abdel Fattah Galāl 《Prospects》1993,23(3-4):687-709
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Arabic is a morphologically rich language that presents significant challenges to many natural language processing applications because a word often conveys complex meanings decomposable into several morphemes (i.e. prefix, stem, suffix). By segmenting words into morphemes, we could improve the performance of English/Arabic translation pair’s extraction from parallel texts. This paper describes two algorithms and their combination to automatically extract an English/Arabic bilingual dictionary from parallel texts that exist in the Internet archive after using an Arabic light stemmer as a preprocessing step. Before using the Arabic light stemmer, the total system precision and recall were 88.6% and 81.5% respectively, then the system precision an recall increased to 91.6% and 82.6% respectively after applying the Arabic light stemmer on the Arabic documents.  相似文献   
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