A framework for web-based learning     

Badrul H. Khan 《TechTrends》2000,44(3):51-51

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Effects of audiotutorial and conventional instructional techniques on cognitive achievements     

Abdul G. Khan 《科学教学研究杂志》1980,17(1):47-53

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A qualitative analysis of context-aware ubiquitous learning environments using Bluetooth beacons     

Sohaib Ahmed  Sameena Javaid  Moazzam Fareed Niazi  Anzar Alam  Adnan Ahmad  Murad Ali Baig 《Technology, Pedagogy and Education》2019,28(1):53-71

The use of Bluetooth Low Energy (BLE) beacons is becoming widespread for context-aware learning environments. This technology can be used in indoor and outdoor settings such as museums, shops, home and schools in order to identify the location of learners and their contexts. Specifically, in the constructivist view of learning, learners can use such sensing technology for constructing knowledge and experiencing learning at any time, anywhere. However, exploration of such technology has been limited in the constructivist context-aware ubiquitous learning (U-learning) literature. For this purpose, the authors evaluated two android-based U-learning applications: one was an outdoor learning environment in a garden, the other was about locating books in a library. The applications were implemented and tested with school and university students. The qualitative results are presented in this article, and show how such sensing technology is promising for both pedagogical environments.  相似文献   

Glial cells: The other cells of the nervous system     

Yasmin Khan  Medha S. Rajadhyaksha 《Resonance》2002,7(6):6-13

Neuroscientists have believed for a long time that glial cells are supportive elements of the nervous system and have little role in neuronal function. Despite outnumbering neurons tenfold in the Central Nervous System (CNS), and contributing to more than half the brain volume, not much attention was paid to these cells. Recently, glial cells have been found to be far more active participants in CNS function. A set of glial cells, the oligodendrocytes, has attracted attention as their precursors have been found to be extremely plastic. Though these precursor cells are initially committed to form oligodendrocytes alone, they can also be induced to form astrocytes and neurons. Such examples of transdetermination are opening up new lines of research with immense clinical implications. In this part of the series we review some aspects of oligodendrocyte structure and function.  相似文献   

The socioemotional development of orphans in orphanages and traditional foster care in Iraqi Kurdistan     

Abdulbaghi Ahmad  Kirmanj Mohamad 《Child abuse & neglect》1996,20(12):1161-1173

In order to investigate orphans' situation and development in Iraqi Kurdistan, samples from the two available orphan care systems, the traditional foster care and the modern orphanages, are examined at an index test and at 1-year follow-up regarding competency scores and behavioral problems at both test occasions, and post-traumatic stress reactions at a 1-year follow-up. Achenbach Child Behavior Check List (CBCL) and two instruments regarding post-traumatic stress disorder (PTSD) were used. While competency scores showed an improvement in both samples at the follow-up test, the problem scores increased in the orphanage sample and decreased among the foster care subjects. Moreover, the orphanage sample reported higher frequency of post-traumatic stress disorder (PTSD) than the foster care children. The results are discussed with regard to the value of the Kurdish society's own traditions in taking care of orphans.  相似文献   

Gender and Education for All: Progress and problems in achieving gender equity     

Grace Chisamya  Joan DeJaeghere  Nancy Kendall  Marufa Aziz Khan 《International Journal of Educational Development》2012

The paper explores the effects of rapid increases in gender parity in primary schooling in Bangladesh and Malawi on gender inequities in schools and communities. Based on an analysis of comparative case studies of marginalized communities, we argue that educational initiatives focused on achieving gender parity provide limited evidence that girls’ educational experiences modeled significantly different gender norms than in communities, or that by being educated, girls experienced a transformation of the inequitable gender relations they faced in society. The data illustrate persistent gender discrimination related to educational attainment and learning, and gender-based violence in schools. These patterns of gendered discrimination and violence largely mirrored those that girls and boys experienced in their homes and communities, raising important questions about the transformational capacity of current gender parity and schooling models.  相似文献   

Level of Students＇ Achievement in Mathematics at the End of Elementary Education in Yemen     

Tarig Mohamed  Ali Mohamed  Khair Ahmad  Zamri Khairani  Tahra Aisa  Elrofai 《美中教育评论》2012,(6):588-593

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Intensity of parasitic infestation in silver carp, Hypophthalmichthys molitrix     

M. M. Alam  M. A. Khan  M. A. Hussain  D. Moumita  A. G. Mazlan  K. D. Simon 《Journal of Zhejiang University. Science. B》2012,13(12):1024-1028

Silver carp, Hypopthalmichthys molitrix is one of the most economically valuable fish species in Bangladesh. However, its production is often hindered by parasite-induced mortality. The present study reports the intensity of parasitic infestation in 216 specimens of H. molitrix collected from different fish markets in Rajshahi City, Bangladesh. Nine different parasite species (Trichodina pediculatus, Dactylogyrus vastator, Ichthyophthirius multifilis, Gyrodactylus elegans, Lernaea sp., Apiosoma sp., Myxobolus rohitae, Camallanus ophiocephali, and Pallisentis ophiocephali) were recovered from the gill, skin, stomach, and intestine of host fish. The highest level of infection was observed for host skin, while lower levels were observed for host gill, stomach, and intestine. The results also revealed that the intensity of parasite infection in different organs of H. molitrix varied with the season. In particular, the highest levels of infection were recorded during the winter period (November-February), when fish are most susceptible to parasites. The findings of the study will help in the management and conservation of H. molitrix.  相似文献   

Stress intensity factors under combined bending and torsion moments     

Al?Emran?IsmailEmail author  Ahmad?Kamal?Ariffin  Shahrum?Abdullah  Mariyam?Jameelah?Ghazali  Mohammed?Abdulrazzaq  Ruslizam?Daud 《浙江大学学报(A卷英文版)》2012,13(1):1-8

This paper discusses stress intensity factor (SIF) calculations for surface cracks in round bars subjected to combined torsion and bending loadings. Different crack aspect ratios, a/b, ranging from 0.0 to 1.2 and relative crack depths, a/D, ranging from 0.1 to 0.6 were considered. Since the loading was non-symmetrical for torsion loadings, a whole finite element model was constructed. Then, the individual and combined bending and torsion loadings were remotely applied to the model. The equivalent SIF method, F*_EQ, was then used explicitly to combine the individual SIFs from the bending and torsion loadings. A comparison was then carried out with the combined SIF, F*_FE, obtained using the finite element analysis (FEA) under similar loadings. It was found that the equivalent SIF method successfully predicted the combined SIF for Mode I. However, discrepancies between the results determined from the different approaches occurred when F _III was involved. It was also noted that the predicted F*_FE using FEA was higher than the F*_EQ predicted through the equivalent SIF method due to the difference in crack face interactions.  相似文献   

Policy versus ground reality: secondary English language assessment system in Bangladesh     

Sharmistha Das  Prithvi Shrestha  Arifa Rahman  Rubina Khan 《Curriculum Journal》2014,25(3):326-343

Any policy reform in education is highly effective when it is planned and implemented ‘holistically’ and yet, it is the most challenging way forward. Many countries in Asia have reformed their English language policies and syllabi in the last two decades due to the increasing value of the language worldwide. Motivated by a ‘communicative approach’ to English language teaching, Bangladesh was one of the countries that launched such a reform in the 1990s. However, this reform has been criticised for imposing the changes on teachers without preparing them sufficiently. More importantly, there is limited evidence as to how much the secondary English language assessment system is aligned with the changes introduced in the curriculum. In order to explore this gap, a medium-scale study was conducted in 38 secondary schools in Bangladesh, following a mixed methods approach. The findings highlighted a ‘mismatch’ between the intended English language learning outcomes and current assessment practices, including the resulting challenges faced by the teachers. This paper argues that language education reform is likely to fail if the assessment system is not aligned with the curriculum.  相似文献