Systematic use of teleconferencing in distance education     

Yusup Hashim  Ibrahim Jaafar 《Educational technology research and development : ETR & D》1999,47(2):117-124

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Mixed-methods pre-match cooling improves simulated soccer performance in the heat     

Jeffrey William Frederick Aldous  Bryna Catherine Rose Chrismas  Ibrahim Akubat  Charlotte Anne Stringer  Grant Abt 《European Journal of Sport Science》2019,19(2):156-165

This investigation examined the effects of three pre-match and half-time cooling manoeuvres on physical performance and associated physiological and perceptual responses in eight University soccer players during a non-motorised treadmill based individualised soccer-specific simulation [intermittent soccer performance test (iSPT)] at 30°C. Four randomised experimental trials were completed; following 30-min (pre-match) and 15-min (half-time) cooling manoeuvres via (1) ice slurry ingestion (SLURRY); (2) ice-packs placed on the quadriceps and hamstrings (PACKS); (3) mixed-methods (MM; PACKS and SLURRY concurrently); or no-cooling (CON). In iSPT first half, a moderate increase in total (Mean?±?Standard Deviation: 108?±?57 m, qualitative inference: most likely, Cohen’s d: 0.87, 90%CL: ±0.31), high-speed (56?±?46 m, very likely, 0.68?±?0.38) and variable run (15?±?5 m, very likely, 0.81?±?0.47) distance covered was reported in MM compared with CON. Additionally, pre-match reductions in thermal sensation (–1.0?±?0.5, most likely, –0.91?±?0.36), rectal (–0.6?±?0.1°C, very likely, –0.86?±?0.35) and skin temperature (–1.1?±?0.3°C, very likely, –0.88?±?0.42) continued throughout iSPT first half. Physical performance during iSPT first half was unaltered in SLURRY and PACKS compared to CON. Rectal temperature was moderately increased in SLURRY at 45-min (0.2?±?0.1°C, very likely, 0.67?±?0.36). Condition did not influence any measure in iSPT second half compared to CON. Only MM pre-match cooling augmented physical performance during iSPT first half, likely due to peripheral and central thermoregulatory factors favourably influencing first half iSPT performance. Further practical half-time cooling manoeuvres which enhance second half performance are still required.  相似文献   

做信虫一周年——我的信虫放送     

Rony 《当代体育》2009,(1):73-73

我们做信虫每个人都有一个自己的方向。以前我的方向是德国和英国,久而久之,随着写信数量的增多。目标从德国、英国逐渐扩大到了西班牙、意大利等。然而德国始终是我写信的起点。有人说德国联赛不像英格兰联赛那样赏心悦目,也不像西班牙联赛充满技术含量,但我依然热爱着德国联赛。当然其中一部分原因也归功于写信的缘故。直到这个赛季,我每个赛季都保持着至少写20封信给德国的俱乐部或官员的数量,最多是一个赛季写了将近50封给德国的俱乐部。当时带着一种恒心和毅力坚持写信,想收到各个俱乐部的签名卡,虽然最后失败的也不胜枚举,但我也坚定了作为信虫的决心。  相似文献   

岁月荷兰     

Rony/ 《当代体育》2009,(4):74-74

笔者是一个荷兰球迷,喜欢橙色的激情和攻势足球,对荷兰联赛也充满着热爱,如果让我用一句话来形容荷兰联赛便为：“小荷才露尖尖角”。荷兰联赛培养出了一批又一批的世界希望之星,  相似文献   

留洋中国球员收获     

Rony 《当代体育》2009,(2):74-74

2008年夏天对于中国足球来说是特别的一年,随之而来的却是留洋球员人数越来越少,从当时的十多人急剧减少到了几个人。这次我来介绍一下自己以前的一些留洋球员签名。  相似文献   

Role of water molecules in sodium bis(2-ethylhexyl) phosphate reversed micelles in n-heptane     

Taleb H. Ibrahim 《Journal of The Franklin Institute》2010,347(5):875-881

Recently molecular modeling was employed on the metal-extracted aggregates that form during the liquid/liquid extraction of transition metals. During the extraction process, the aqueous phase pH is adjusted with sodium hydroxide. In additional to the formation of the transition metal-extractant reversed micelles, sodium-bis(2-ethylhexyl) phosphate (NaDEHP) reversed micelles can also form. According to the classical model of reversed micelles, water molecules act as promoters for the formation of reversed micelles. Water molecules act as “gluing” agents for micellization in apolar media. Here we report a unique finding about the role of water molecules in reversed micellar aggregates using molecular modeling. The molecular modeling of the reversed micellar system of NaDEHP in n-heptane clearly shows that water molecules can act as an “antimicellization” agent. Water molecules have no gluing effect on the formation of NaDEHP reversed micelles. In fact, large NaDEHP reversed micelles are formed in “dry” conditions.  相似文献   

Digitization of past question papers, dissertations and theses: A case study of 30 Nigerian university libraries     

Ibrahim Usman Alhaji   《International Information and Library Review》2007,39(3-4):228-246

This paper evaluates the status of digitization in 30 Nigerian university libraries with a view to identifying the status, progress, prospects and challenges to digitize library materials and form the basis of providing a roadmap to successful execution of digitization projects. The study assessed the status of digitization of past question papers, theses and dissertations in Nigerian university libraries from May to September 2006 through a self-administered questionnaire, site visits and interviews. It was found that, though there are automation services in those universities, there is no digitization of these materials mentioned in the surveyed institutions. The major obstacles militating against digitizing in the university libraries include lack of funds, lack of appropriate facilities, lack of skilled manpower and lack of constant electricity supply. Respondents were anxious to have the services to commence because of their importance in facilitating teaching, learning and research.  相似文献   

Student orientation in higher education: development of the construct     

Ibrahim Alnawas 《Higher Education》2015,69(4):625-652

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The implications of a connectivist learning blog model and the changing role of teaching and learning          下载免费PDF全文

Elaine Garcia  Ibrahim Elbeltagi  Mel Brown  Kerry Dungay 《British journal of educational technology : journal of the Council for Educational Technology》2015,46(4):877-894

While the use of Web 2.0 tools and specifically blogs is becoming increasingly popular within higher education (HE) and has been shown to promote learning, relatively little is known about the manner in which such tools may affect how teaching and learning may change as a result of the use of such tools. It is within this context that a connectivist learning model was created and has been further developed within this paper in order to consider the implications of how the use of blogs may change the manner in which teaching and learning occurs. Within this research, a case study of the use of collective student blogs utilized as part of a formally assessed module, undertaken within an HE institution, is utilized to explore the manner in which teaching and learning can be seen to change through a connectivist learning model of blog usage. From this case study, it appears that connectivism does provide a theoretical model for the way in which teaching and learning may change as a result of the use of blogs by learners. However, the experience of staff and students who undertook the project suggests that while a number of elements of the connectivist model can be identified, these are not seen universally among all students.  相似文献   

ASSESSING CHEMISTRY-LEARNING COMPETENCIES OF STUDENTS IN ISOLATED RURAL SENIOR HIGH SCHOOLS BY USING THE NATIONAL EXAMINATION: A CASE STUDY OF SIMEULUE ISLAND,INDONESIA     

M- Adlim  Soewarno S  Hasbi Ali  Armia Ibrahim  Hasmunir Umar  Khairil Ismail  Usman A. Gani  Ishak Hasan  Burhanuddin Yasin 《International Journal of Science and Mathematics Education》2014,12(4):817-839

This study explored learning competency based on the Indonesian National Examination focusing especially on chemistry performance and the circumstances of senior high school students and teachers in rural areas of Simeulue Island, Indonesia. The National Examination total score and chemistry score for students in rural areas were consistently lower than students in urban areas during 2008–2010. The majority of rural students were failing to master key chemistry concepts. Their low performance on laboratory-based questions appeared to indicate that the associated practical work was not done as part of the chemistry courses. Some chemistry topics were not taught due to insufficient time, student weaknesses, insufficient textbooks, and other reasons. The issues of low competency of teachers, poverty for the majority of students, low enrollment in schools, and low competition among students in these rural senior high schools appeared to be common problems across rural settings. The local government has recommended providing a consolidated rural high school with qualified chemistry teachers, laboratories, and transportation to address factors negatively influencing student achievement. Furthermore, local rural school officials need to recruit and retain qualified teachers in these isolated areas, provide effective textbooks and instructional resources, and facilitate the professional development of chemistry teachers.  相似文献