A new eccentricity-based simulation to generate ultimate confined interaction diagrams for circular concrete columns     

Ahmed Abd El-Fattah  Asad Esmaeily 《Journal of The Franklin Institute》2011,348(7):1163-1176

The analysis of circular concrete columns using unconfined concrete models is a well established practice. However, there is a necessity to develop realistic analysis and design tools that predict the extreme ultimate capacity of such columns since modern codes and standards like AASHTO LRFD are introducing extreme load events. The increase in strength and ductility due to full axial confinement is not applicable to pure bending and bending plus axial load simply because the area of effective confined concrete is reduced. The higher the eccentricity the smaller the compressed portion of the confined core. Accordingly, the ultimate confined strength is gradually reduced from the fully confined value f_cc′ (at zero eccentricity) to the unconfined value f_c′ (at infinite eccentricity) as a function of eccentricity to diameter ratio. A numerical analysis algorithm is developed using the finite layer procedure and the secant stiffness approach within a framework of incremental-iterative moment of area computations. The resulting nonlinear section analysis requires radial loading in which the eccentricity is kept constant or the axial load is proportional to the applied moment. The results are compared with existing experimental data and the widely used Mander model to benchmark the present predictions.  相似文献   

The Effects of One versus Two Years of Intensive Reading Intervention Implemented with Late Elementary Struggling Readers          下载免费PDF全文

Jeremy Miciak  Garrett Roberts  W. Pat Taylor  Michael Solis  Yusra Ahmed  Sharon Vaughn  Jack M. Fletcher 《Learning disabilities research & practice》2018,33(1):24-36

We examined the effectiveness of a researcher‐provided reading intervention with 484 fourth graders with significant reading difficulties. Students were randomly assigned to one year of intervention, two years of intervention, or a business‐as‐usual comparison condition (BAU). Students assigned to two years of intervention demonstrated significantly greater gains in reading fluency compared to students who received one year of intervention and the BAU group. Students in both the one‐ and two‐year groups demonstrated similar and significantly larger gains in word reading in comparison to the BAU group. There were no statistically significant differences between the three groups on standardized measures of reading comprehension. We discuss these results in the context of research with late elementary and secondary students targeting reading comprehension.  相似文献   

Gradual refinement for application-specific MPSoC design from Simulink model to RTL implementation   总被引：1，自引：0，他引：1  

Kai Huang  Xiao-lang Yan  Sang-il Han  Soo-ik Chae  Ahmed A. Jerraya  Katalin Popovici  Xavier Guerin  Lisane Brisolara  Luigi Carro 《浙江大学学报(A卷英文版)》2009,10(2):151-164

The application-specific multiprocessor system-on-chip （MPSoC） architecture is becoming an attractive solution to deal with increasingly complex embedded applications, which require both high performance and flexible programmability. As an effective method for MPSoC development, we present a gradual refinement flow starting from a high-level Simulink model to a synthesizable and executable hardware and software specification. The proposed methodology consists of five different abstract levels： Simulink combined algorithm and architecture model （CAAM）, virtual architecture （VA）, transactional accurate architecture （TA）, virtual prototype （VP） and field-programmable gate array （FPGA） emulation. Experimental results of Motion-JPEG and H.264 show that the proposed gradual refinement flow can generate various MPSoC architectures from an original Simulink model, allowing processor, communication and tasks design space exploration.  相似文献   

The Muslim football player and Ramadan: current challenges     

Zerguini Y  Ahmed QA  Dvorak J 《Journal of sports sciences》2012,30(Z1):S3-S7

Islam is a monotheistic Abrahamic faith characterised by devotional orthopraxy. The actions expected of followers of Islam are closely prescribed in the Qur'an. Muslims understand Ramadan as a mandatory requirement, excused only in the event of illness, infirmity or extremes of age. Due to the increasing popularity of football among Muslims, more and more Muslim football players of all levels make the decision to follow the Ramadan fast while they need to practise and compete. Sports medicine clinicians and scientists have the responsibility to provide them with the knowledge and evidence on how exactly Ramadan fasting impacts on their performance and how to optimise their eating, drinking and sleeping in order to minimise negative effects of their religious practice, should any have been demonstrated. The first International Federation of Football Associations (FIFA) Medical Assessment and Research Centre (F-MARC) study concluded that biochemical, nutritional, subjective well-being and performance variables were not adversely affected in young male national level players who followed Ramadan fasting in a controlled environment. Match performance was however not measured and the study did not include elite level players, leading to the Ramadan consensus meeting in order to answer the remaining questions. The conclusions and recommendations published in this supplement suggest that the best coping strategies will remain individual - as is the choice to fast.  相似文献   

Modern standard Arabic speech corpus for implementing and evaluating automatic continuous speech recognition systems     

Mohammad Abd-Alrahman Mahmoud Abushariah  Raja Noor Ainon  Roziati Zainuddin  Assal Ali Mustafa Alqudah  Moustafa Elshafei Ahmed  Othman Omran Khalifa 《Journal of The Franklin Institute》2012,349(7):2215-2242

This paper presents our work towards developing a new speech corpus for Modern Standard Arabic (MSA), which can be used for implementing and evaluating Arabic speaker-independent, large vocabulary, automatic, and continuous speech recognition systems. The speech corpus was recorded by 40 (20 male and 20 female) Arabic native speakers from 11 countries representing three major regions (Levant, Gulf, and Africa). Three development phases were conducted based on the size of training data, Gaussian mixture distributions, and tied states (senones). Based on our third development phase using 11 hours of training speech data, the acoustic model is composed of 16 Gaussian mixture distributions and the state distributions tied to 300 senones. Using three different data sets, the third development phase obtained 94.32% and 8.10% average word recognition correctness rate and average Word Error Rate (WER), respectively, for same speakers with different sentences (testing sentences). For different speakers with same sentences (training sentences), this work obtained 98.10% and 2.67% average word recognition correctness rate and average WER, respectively, whereas for different speakers with different sentences (testing sentences) this work obtained 93.73% and 8.75% average word recognition correctness rate and average WER, respectively.  相似文献   

Finite/fixed-time synchronization control of coupled memristive neural networks     

Jiarong Li  Haijun Jiang  Cheng Hu  Ahmed Alsaedi 《Journal of The Franklin Institute》2019,356(16):9928-9952

Finite-time and fixed-time synchronization (FAFS) of coupled memristive neural networks (CMNNs) with discontinuous feedback functions are explored in this paper. Firstly, a more comprehensive stability theory is systematically established. Secondly, by designing adaptive feedback controller and discontinuous feedback controller, both finite-time and fixed-time synchronization can be realized through regulating the main control parameter. Thirdly, 1-norm and quadratic-norm Lyapunov functions are considered simultaneously in this article, while in estimating the settling time, the former one is more accurate than the latter one under the same synchronization criteria. Finally, in numerical simulation, the analysis and comparison of the proposed controllers are given to show the effectiveness of the corresponding results.  相似文献   

Hepcidin and Ferritin: Important Mediators in Inflammation Associated Anemia in Systemic Lupus Erythematosus Patients     

Neeraja Kunireddy  Rachel Jacob  Siraj Ahmed Khan  B. Yadagiri  K. S. S. Sai Baba  I. Rajendra Vara Prasad  Iyyapu Krishna Mohan 《Indian journal of clinical biochemistry : IJCB》2018,33(4):406-413

Systemic Lupus Erythematosus is an autoimmune disease with female preponderance. Anemia is found in 50% of Systemic Lupus Erythematosus patients. This is a cross sectional case control study with 30 female Systemic Lupus Erythematosus patients having inflammation associated anemia (Hemoglobin < 10.0 gm/dl) and 30 age matched controls with the aim to measure serum hepcidin and ferritin levels, correlate and study their role as homeostatic regulators of iron metabolism and utility as markers. Serum transferrin, ferritin, iron, total iron binding capacity, hsCRP, liver enzymes and renal parameters were analyzed by using automated analyser. Hepcidin levels were estimated by Sandwich-ELISA method. There was significant decrease in Iron (p < 0.0001), Iron Binding capacity (p < 0.0001), Transferrin (p < 0.0001) in patients, and a significant increase in inflammatory markers: hs-CRP (p < 0.0001), ESR (p < 0.0001) compared to controls. Significant increase in both Hepcidin (p < 0.0001) and Ferritin (p < 0.0001) was observed in patients with significant positive correlation (r = 0.711) with each other. Additionally, ferritin and hepcidin significantly positively correlated with hs-CRP and ESR (r = 0.526, 0.735); (r = 0.427, 0.742) respectively. Negative correlation with hemoglobin, iron, total iron binding capacity and transferrin with hepcidin (r = ? 0.80, ? 0.307, ? 0.553, ? 0.584) and ferritin (r = ?0.722, ? 0.22, ? 0.654, ? 0.728) was observed respectively. On ROC analysis both hepcidin and ferritin has sensitivity of 96.7%, specificity of 100% at cut-off values of 110 and 49 respectively. AUC of hepcidin was 0.993 and ferritin was 0.978. We have established a positive linear correlation between Hepcidin and Ferritin levels in disease activity and the changes correlated with the inflammatory state and anemia in patients, making them important mediators and potential markers of inflammation associated anemia.  相似文献   

Stationary distribution of an HIV model with general nonlinear incidence rate and stochastic perturbations     

Yan Wang  Daqing Jiang  Tasawar Hayat  Ahmed Alsaedi 《Journal of The Franklin Institute》2019,356(12):6610-6637

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After Six Decades of Systematic Study of Creativity: What Do Teachers Need to Know About What It Is and How It Is Measured?     

Ahmed M. Abdulla  Bonnie Cramond 《Roeper Review》2017,39(1):9-23

With creativity now being emphasized in schools, it is important for teachers to understand what it is and how it is measured. This review of the literature is an attempt to make sense of the many definitions and measures of creativity. As a result, this comprehensive review shows that most definitions agree that there are at least two criteria to judge whether a person or a product is creative or not, originality and usefulness. Organized according to Rhodes’s 3 P conceptualization of creativity—person, process, product, and press—more than 40 assessments used in creativity research were reviewed. Familiarity with the definitions, views of, and measurement of creativity can help teachers recognize and foster creativity in their students.  相似文献   

Introduction
Access and equity in financing higher education in Arab countries     

Ahmed Galal  Taher H. Kanaan 《Prospects》2011,41(1):5-8

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