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Nurul Akidah BAHARUDDIN Hamimah Abd RAHMAN Andanastuti MUCHTAR Abu Bakar SULONG Huda ABDULLAH 《浙江大学学报(A卷英文版)》2013,14(1):11-24
Solid oxide fuel cells(SOFCs) offer high energy conversion,low noise,low pollutant emission,and low processing cost.Despite many advantages,SOFCs face a major challenge in competing with other types of fuel cells because of their high operating temperature.The necessity to reduce the operational temperature of SOFCs has led to the development of research into the materials and fabrication technology of fuel cells.The use of composite cathodes significantly reduces the cathode polarization resistance and expands the triple phase boundary area available for oxygen reduction.Powder preparation and composite cathode fabrication also affect the overall performance of composite cathodes and fuel cells.Among many types of cathode materials,lanthanum-based materials such as lanthanum strontium cobalt ferrite(La1-xSrxCo1-yFeyO3- have recently been discovered to offer great compatibility with ceria-based electrolytes in performing as composite cathode materials for intermediate-to low-temperature SOFCs(IT-LTSOFCs).This paper reviews various ceria-based composite cathodes for IT-LTSOFCs and focuses on the aspects of progress and challenges in materials technology. 相似文献
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This study examines the higher education experience among Palestinian Arab females in two national spaces and seeks to determine whether studying at an Arab institution of higher learning in a nearby Arab country can alleviate the emotional and economic difficulties that affect Palestinian women at Israeli universities. What can institutions of higher learning in Israel learn or derive from the proposed model to relieve the alienation and exclusion that their female Palestinian students experience? The study will compare two geographically distinct groups of women students. The first is a group of Palestinian women who attend university in Jordan, while the second consists of Palestinian women of Bedouin origin from southern Israel who study in the Jewish Israeli cultural space. The study seeks to shed light on the experience of Muslim students in Western and Muslim universities. 相似文献
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Fused deposition modelling （FDM） is one of rapid prototyping （RP） technologies which uses an additive fabrication approach.Each commercially available FDM model has different types of process parameters for different applications.Some of the desired parts require excellent surface finish as well as good tolerance.The most common parameters requiring setup are the raster angle,tool path,slice thickness,build orientation,and deposition speed.The purpose of this paper is to discuss the process parameters of FDM Prodigy Plus （Stratasys,Inc.,Eden Prairie,MN,USA）.Various selected parameters were tested and the optimum condition was proposed.The quality of the parts produced was accessed in terms of dimensional accuracy and surface finish.The optimum parameters obtained were then applied in the fabrication of the master pattern prior to silicone rubber moulding （SRM）.These parameters would reduce the post processing time.The dimensional accuracy and surface roughness were analyzed using coordinate measuring machine （CMM） and surface roughness tester,respectively.Based on this study,the recommended parameters will improve the quality of the FDM parts produced in terms of dimensional accuracy and surface roughness for the application of SRM. 相似文献
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Michèle Cowan Nasir Nisar Arain Tawfic Samer Abu Assale Abdulelah Hassan Assi Raed Alwai Albar Paul K. Ganguly 《Anatomical sciences education》2010,3(5):272-275
Alfaisal University is a new medical school in Riyadh, Kingdom of Saudi Arabia that matriculates eligible students directly from high school and requires them to participate in a hybrid problem‐based learning (PBL) curriculum. PBL is a well‐established student‐centered approach, and the authors have sought to examine if a student‐centered, integrated approach to learn human structures leads to positive perceptions of learning outcomes. Ten students were divided into four groups to rotate through wet and dry laboratory stations (integrated resource sessions, IRSs) that engaged them in imaging techniques, embryology, histology, gross anatomy (dissections and prosections), surface anatomy, and self‐directed learning questions. All IRSs were primarily directed by students. During two second‐semester organ system blocks, forty students responded to a structured questionnaire designed to poll students' perceptions of changes in their knowledge, skills, and attitudes as a result of IRS. The majority (60%) of students felt that the student‐centered approach to learning enhanced their medical knowledge. Most students also felt that the IRS approach was advantageous for formulating clear learning objectives (55%) and in preparing for examinations (65%). Despite their positive feelings toward IRS, students did not view this learning approach as an adequate replacement for the knowledge gained from lectures and textbooks. Students' performance on objective structured practical examinations improved significantly for the two curricular blocks that included IRS compared with earlier non‐IRS blocks. A student‐centered approach to teach human structure in a hybrid PBL curriculum may enhance understanding of the basic sciences in first‐year medical students. Anat Sci Educ 3:272–275, 2010. © 2010 American Association of Anatomists. 相似文献
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Booney Vance Larry Mayes Ronald C. Eaves Naim Abu Homos 《Psychology in the schools》1991,28(2):100-105
The present investigation compared the Cognitive Levels Test (CLT) and the Wechsler Intelligence Scale for Children-Revised (WISC-R) scores for 55 children who were referred for remedial educational services. A comparison of the correlations for each of the criterion measures from the WISC-R showed a consistent significant positive relationship with the CLT. A repeated measures analysis of variance that compared standard scores for the CLT with those of the WISC-R indicated that significant differences existed between WISC-R IQs and the CLT Cognitive Index. Implications concerning the validity of the Cognitive Levels Test are discussed. 相似文献
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Learning communities and fair trade in doctorates and development: report of a collaborative project
Janinka Greenwood Safayet Alam Abu Nayeem Mohammad Salahuddin Mollah Mohammed Haroon-Ar Rasheed 《Globalisation, Societies & Education》2016,14(1):49-67
This article reports the second stage of a study examining an academic partnership in which Bangladeshi doctoral students in a western university focus their research in the grounded context of Bangladesh and investigate the processes for change. After briefly outlining the previous published stage which examined the academic trade in higher education with developing countries, the article builds on the concept of fair academic trade to critically reflect on the development of a doctoral learning community, a publication project and three specific doctoral studies. The methodological approach is one of participatory action research, with focus on critical reflection on practice. 相似文献
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This research examined the function within lexical access of the main morphemic units from which most Arabic words are assembled, namely roots and word patterns. The present study focused on the derivation of nouns, in particular, whether the lexical representation of Arabic words reflects their morphological structure and whether recognition of a word involves recognition of its morphological constituents. The morphology of Arabic language constitutes two main systems: inflectional morphology and derivational morphology. Inflectional morphology is used to express grammatical relations and derivational morphology deals with the formation of new words in language; it contains two types of word patterns: verbal and nominal. In this study, it was assumed that roots are lexical entities that can facilitate lexical access to a large cluster of words that derive from them, whereas word patterns are not lexical entities and have no role in access to words assembled by them. The lexical representations of the main morphemic units were examined in four experiments using skilled readers applying masked priming technique tasks: lexical decision and naming. The results indicated that previous exposure to a word sharing the same word pattern had no marked facilitating effect on lexical decision or on naming. The main conclusion of this study on the morphology of Arabic is that roots and word patterns have no essential role in word organisation in the mental lexicon. In addition, words in nominal pattern in derivational morphology are represented in their whole shape in the mental lexicon and each word has an independent representation. 相似文献
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Aqilah Nawwarah H.A. Rajak Dk. Nurul Najiah Pg Abu Bakar Nur Dina Azyyati Lajim Nurul Hikmatull Su’aidah Haji Kamarulzaman Siti Nur Fakhrinah Haji Karim Mohammad Nabil Almunawar 《Education and Information Technologies》2018,23(6):2341-2361
This research studies on the e-learning services acceptance in higher education institutions in Brunei Darussalam. This research has seven hypotheses, relating to independent, intermediary, and dependent variables. The independent variables include lecturer’s characteristics, design of learning contents, teaching materials, and playfulness; while the intermediary variables are perceived benefits and perceived ease of use. On the other hand, the dependent variable in this research is the intention to use e-learning. Multiple regression analysis were conducted to test the hypotheses proposed. Data analysis from this research has confirmed that the lecturer’s characteristics, teaching materials, perceived ease of use and the intention to use e-learning corresponds to the perceived benefits. Meanwhile, the design of learning content and the intention to use e-learning are positively related to the perceived ease of use and lastly, the variable playfulness is positively related to the intention to use e-learning. 相似文献