Detection of optimal spreading codes for DS-CDMA wireless systems with despreading sequences weighted by adjustable chip waveforms     

Ibrahim Develi 《Journal of The Franklin Institute》2005,342(1):69-84

This paper considers the problem of detecting the optimal spreading codes (OSC) in a given code set for a direct sequence-code division multiple access system that employs despreading sequences weighted by adjustable chip waveforms. Due to computational complexity required to detect the OSC in a code set, a simple and efficient strategy is introduced. Analysis and numerical results show that the proposed strategy can successfully distinguish the spreading codes being most suitable references for a given code set in which the candidate spreading codes have equal crosscorrelation properties.  相似文献   

The use of lysosomal enzymuria in the early detection and monitoring of the progression of diabetic nephropathy     

Donatien Gatsing  Ibrahim Hassan Garba  Godwin I. Adoga 《Indian journal of clinical biochemistry : IJCB》2006,21(2):42-48

Recent acquisitions on the early detection and monitoring of the progression of diabetic complications (nephropathy) using the techniques of enzymology (lysosomal enzymes) are reviewed. it appears that the kidney is the principal source of urinary lysosomal enzymes. Urinary samples for lysosomal enzyme determination can be either 24-hour or spot-collection. The use of synthetic substrates (4-methylumbelliferyl substrates) provides an easy, inexpensive, sensitive and highly reproducible method of lysosomal enzyme assay. It is recommended that more than one enzyme be assayed in the process. The use of fractional enzyme excretion (FEE) ratios is further recommended. The urinary lysosomal glycosidases investigated and found to be of particular diagnostic value in the early detection of diabetic nephropathy include N-acetyl-β-D-glucosaminidase (β-hexosaminidase, NAG), β-glucuronidase and β-galactosidase, with NAG being the most useful indicator. Urinary NAG can be used in monitoring the progression of diabetic nephropathy. The fluorimetric assay of lysosomal glycosidases is particuarly recommended in developing countries since it is simple, sensitive and inexpensive.  相似文献   

PRInK: Environmental virtual interactive based education and learning model for STEM motivation     

Yahaya  Jamaiah  Fadzli  Sazrol  Deraman  Aziz  Yahaya  Noor Zaitun  Halim  Lilia  Rais  Izhar Abadi Ibrahim  Ibrahim  Siti Rohana Ahmad 《Education and Information Technologies》2022,27(4):4771-4791

Education and Information Technologies - Pollution from quarry activities has a substantial environmental impact on many countries. This issue should be addressed accordingly as its impact may...  相似文献   

The impact of orthographic connectivity on visual word recognition in Arabic: A cross-sectional study     

Asaid Khateb  Manal Khateb-Abdelgani  Haitham Y. Taha  Raphiq Ibrahim 《Reading and writing》2014,27(8):1413-1436

This study aimed at assessing the effects of letters’ connectivity in Arabic on visual word recognition. For this purpose, reaction times (RTs) and accuracy scores were collected from ninety-third, sixth and ninth grade native Arabic speakers during a lexical decision task, using fully connected (Cw), partially connected (PCw) and nonconnected (NCw) Arabic words and pseudowords. Effects of grade on word recognition (in RTs and accuracy) and word superiority were predicted to occur. Also, in the third grade, recognition of NCw was predicted to be faster and more accurate than recognition of Cw, because in previous studies NCw were assumed to be visually less complex. In sixth and ninth grades, due to the frequent exposure to connected forms, the recognition of Cw was predicted to be as fast as or faster and more accurate than NCw. The findings largely supported the first and the second hypotheses. As for the third graders, a mixed pattern was obtained, suggesting that the participants were probably in a transitional phase. The results from sixth graders clearly showed that NCw yielded the slowest response times and the lowest accuracy scores across connectivity conditions. Finally, for ninth graders, the absence of connectivity effects on the speed of processing was attributed to the use of very frequent and highly automatized words.  相似文献   

基于Hough直线检测的深度图像配准方法   总被引：1，自引：0，他引：1  

阿布来提·依布拉音  王治强  刘薇  高慧婷 《中国科学院研究生院学报》2013,30(1):112-116

针对传统的图像配准方法中寻找图像之间点对应关系这一难点问题,提出一种基于Hough直线检测的深度图像配准方法.利用Hough变换检测深度图像上的直线,确定不同视点图像上直线之间的对应关系.根据对应直线三维空间上的方向向量确定两幅图像之间的刚体变换参数.最后用模拟深度图像验证方法的有效性并给出三维重建结果.  相似文献   

Enhancing employability through industrial training in the Malaysian context     

Stefanie Pillai  Mahmud H. Khan  Ida Syahirah Ibrahim  Sharmane Raphael 《Higher Education》2012,63(2):187-204

This study discusses the industrial training programme at the University of Malaya in Malaysia, specifically the issues that need to be addressed in order to enhance the employability skills of graduates. Findings from the feedback obtained from trainees and organizations in the 2008/2009 academic session were examined in terms of the extent to which trainees felt they were prepared for their training, and the extent to which the tasks given to them during their training were appropriate. Further, trainees’ self-rating of particular skills and industry’s rating of the trainees were also examined. The feedback is discussed in the context of the need to equip graduates with employability skills, an issue facing Higher Education Providers worldwide. The findings indicate that most of the students were prepared to face the world of work. However, there were several issues which needed attention. These included the need to address the possible mismatch between the tasks assigned to trainees and their areas of study, and the need to enhance English language competency and particular soft skills throughout their degree programme. Continuous input from industry is also necessary to ensure that the training benefits all parties and contributes to the employability skills of trainees.  相似文献   

Do children with reading difficulties benefit from instructional game supports? Exploring children's attention and understanding of feedback     

Asimina Vasalou  Laura Benton  Seray Ibrahim  Emma Sumner  Nelly Joye  Elisabeth Herbert 《British journal of educational technology : journal of the Council for Educational Technology》2021,52(6):2359-2373

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The Potentials of Using Mobile Technology in Teaching Individuals with Learning Disabilities: A Review of Special Education Technology Literature     

Adel Ibrahim M Qahmash 《TechTrends》2018,62(6):647-653

Within the literature, a respectful number of studies related to the use of assistive technologies for special education, resulting in an enormous agenda that encompasses various types of assistive technology applied across disabilities in different types of curricula. These disabilities include, but are not limited to: learning disabilities, mild, moderate and severe mental retardation, speech and communication disorders, hearing and speaking disabilities, and autism Hence, under the intertwined and overlapping umbrellas of assistive technologies and special education, mobile technology finds its promising, new spot on the surface of emerging assistive technologies in the field of special education. This paper addresses the potentials of using mobile technology in teaching individuals with developmental disorders based on current literature.  相似文献   

Jordanian student teachers' perceptions of teaching writing in kindergartens during their field training experience   总被引：1，自引：1，他引：0  

Fathi Ihmeideh  Akram Al‐Basheer  Ibrahim Al‐Momani 《欧洲师范教育杂志》2008,31(4):403-417

The purpose of the study was to examine student teachers' perceptions of teaching writing in kindergartens and to identify to what extent the cooperating teachers influence the student teachers' perceptions. To achieve the research aims, a 31‐item questionnaire was developed by the researchers and administered to 50 student teachers and their cooperating teachers. The questionnaire was administrated to both groups as a pre‐test and to student teachers as a post‐test. The results of the study revealed that student teachers were more likely to be emergent literacy‐oriented in their perceptions of teaching writing than they were to the reading readiness philosophy. Furthermore, the influence of the cooperating teachers was insignificant as the student teachers' perceptions of teaching writing developed earlier were more stable and difficult to alter later. In light of these findings the researchers addressed a number of suggestions and recommendations.  相似文献   

COBRA framework to evaluate e-government services: A citizen-centric perspective     

Ibrahim H. Osman  Abdel Latef Anouze  Zahir Irani  Baydaa Al-Ayoubi  Habin Lee  Asım Balcı  Tunç D. Medeni  Vishanth Weerakkody 《Government Information Quarterly》2014

E-government services involve many stakeholders who have different objectives that can have an impact on success. Among these stakeholders, citizens are the primary stakeholders of government activities. Accordingly, their satisfaction plays an important role in e-government success. Although several models have been proposed to assess the success of e-government services through measuring users' satisfaction levels, they fail to provide a comprehensive evaluation model. This study provides an insight and critical analysis of the extant literature to identify the most critical factors and their manifested variables for user satisfaction in the provision of e-government services. The various manifested variables are then grouped into a new quantitative analysis framework consisting of four main constructs: cost; benefit; risk and opportunity (COBRA) by analogy to the well-known SWOT qualitative analysis framework. The COBRA measurement scale is developed, tested, refined and validated on a sample group of e-government service users in Turkey. A structured equation model is used to establish relationships among the identified constructs, associated variables and users' satisfaction. The results confirm that COBRA framework is a useful approach for evaluating the success of e-government services from citizens' perspective and it can be generalised to other perspectives and measurement contexts.  相似文献