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Isaías García Carmen Benavides Héctor Alaiz Angel Alonso 《Journal of Science Education and Technology》2013,22(4):589-601
This paper describes research on the use of knowledge models (ontologies) for building computer-aided educational software in the field of control engineering. Ontologies are able to represent in the computer a very rich conceptual model of a given domain. This model can be used later for a number of purposes in different software applications. In this study, domain ontology about the field of lead–lag compensator design has been built and used for automatic exercise generation, graphical user interface population and interaction with the user at any level of detail, including explanations about why things occur. An application called Onto-CELE (ontology-based control engineering learning environment) uses the ontology for implementing a learning environment that can be used for self and lifelong learning purposes. The experience has shown that the use of knowledge models as the basis for educational software applications is capable of showing students the whole complexity of the analysis and design processes at any level of detail. A practical experience with postgraduate students has shown the mentioned benefits and possibilities of the approach. 相似文献
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P. Sharma M. Bose Isa Mohd S. Bagdi H. G. Raj 《Indian journal of clinical biochemistry : IJCB》2000,15(2):83-87
Genomic DNA from a clinical isolate ofMycobacterium avium-intracellulare complex was purified and cloned in PBR 322 at the tetracycline resistance site using Bam HI restriction enzyme. A 16 kb cloned
fragment was purified, radiolabeled and used as a probe. Genomic DNA isolated from nineteen MAC strains, threeM. tuberculosis strains and oneM. kansasii strain were digested with Eco RI restriction enzyme, Southern blotted and hybridized with the 16 kb cloned and labeled fragment.
Twelve MAC strains showed positive hybridization although five strains gave faint signals. Positive hybridization was noted
in two out of the threeM. tuberculosis strains, possibly due to shared DNA homology. No signal was received from the singleM. kansasii strain used in this study. 相似文献
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Ormanci Ummuhan Cepni Salih Deveci Isa Aydin Ozhan 《Journal of Science Education and Technology》2015,24(5):532-548
Journal of Science Education and Technology - In Turkey and many other countries, the importance of the interactive whiteboard (IWB) is increasing, and as a result, projects and studies are being... 相似文献
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Mojtaba Salehi Isa Nakhai Kamalabadi Mohammad Bagher Ghaznavi Ghoushchi 《Education and Information Technologies》2014,19(4):713-735
Material recommender system is a significant part of e-learning systems for personalization and recommendation of appropriate materials to learners. However, in the existing recommendation algorithms, dynamic interests and multi-preference of learners and multidimensional-attribute of materials are not fully considered simultaneously. Moreover, these algorithms cannot effectively use the learner’s historical sequential patterns of material accessing in recommendation. For addressing these problems and improving the accuracy and quality of recommendation, a new material recommender system framework based on sequential pattern mining and multidimensional attribute-based collaborative filtering (CF) is proposed. In the sequential pattern based approach, modified Apriori and PrefixSpan algorithms are implemented to discover latent patterns in accessing of materials and use them for recommendation. Leaner Preference Tree (LPT) is introduced to take into account multidimensional-attribute of materials, and learners’ rating and model dynamic and multi-preference of learners in the multidimensional attribute-based CF approach. Finally, the recommendation results of two approaches are combined using cascade, weighted and mixed methods. The proposed method outperforms the previous algorithms on the classification accuracy measures and the learner’s real learning preference can be satisfied accurately according to the real-time up dated contextual information. 相似文献
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Strello Andrés Strietholt Rolf Steinmann Isa Siepmann Charlotte 《Educational Assessment, Evaluation and Accountability》2021,33(1):139-167
Educational Assessment, Evaluation and Accountability - Research to date on the effects of between-school tracking on inequalities in achievement and on performance has been inconclusive. A... 相似文献
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Muhammad Jika Saidu Miah Shah J. Isa Azman Mat Samsudin Ahmad Zam Hariro 《Education and Information Technologies》2022,27(4):5551-5571
Education and Information Technologies - Information governance (IG) embraces underlying necessities to organize information using consistent method for meeting organizational needs. This demand... 相似文献
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Peter Bergström Eva Mårell-Olsson Isa Jahnke 《Scandinavian Journal of Educational Research》2019,63(1):38-52
This study provides new insights into Swedish teachers’ didactical designs when handling two contemporary challenges regarding the new national curriculum and the increasing digitalisation of schools through one-to-one computing initiatives. The research questions consider how teachers organise physical and digital resources in their classrooms as well as variations in teachers’ pedagogical communication. From a study of 23 one-to-one computing classrooms (using tablets), some ethnographic-inspired methods were applied based on classroom observation and recordings of teachers’ teaching. The findings show two distinct forms of teachers’ classroom organisation that indicate different didactical designs used by teachers to integrate one-to-one computing into the classroom. Variations in teaching resulted in a shift of symbolic power and control from teachers to students, which exploit the potential of using one-to-one computing in the classroom. 相似文献
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研究目的：通过比较沉积物运移的不同标准,经选优得出更高精度的标准。创新要点：使用更少的参数和分情况来获得高精度的设计标准。研究方法：1.按状态将下水道中沉积物分成两类：没有沉淀的沉积物和沉淀的推移质;2.利用已有设计标准的方程,运用非线性回归和 MINITAB软件,得到不同情况下的最佳方程式;3.用实验所得的值对各方程预测值进行验证,比较各方程式的预测精度。 重要结论：1.本文提出的方程式可以预测不同情况下的沉积物运移;2.相比于其它标准,本文提出的方程式形式简单、所需参数少和参数估计简单,并且预测精度更高。 相似文献
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