Ahmed Taha - Academia.edu (original) (raw)

Papers by Ahmed Taha

Healthcare

Recruiting and retaining sufficient participants is one of the biggest challenges researchers fac... more Recruiting and retaining sufficient participants is one of the biggest challenges researchers face while conducting clinical trials (CTs). This is due to the fact of misconceptions and insufficient knowledge concerning CTs among the public. The present cross-sectional study was conducted from April 2021 to May 2022. We evaluated knowledge and attitude among 480 participants using a pretested Arabic questionnaire. The correlation between knowledge and attitude score was tested through Spearman’s correlation test, and the logistic regression test evaluated the associated factors for knowledge and attitude. Of the studied participants, 63.5% were male and belonged to the age group less than 30 years (39.6%). Nearly two-thirds (64.6%) of them had never heard of CT. More than half of the participants had poor knowledge (57.1%) and attitude (73.5%) towards CTs. Participants’ knowledge scores were significantly associated with education level (p = 0.031) and previous participation in healt...

arXiv (Cornell University), Apr 12, 2018

Northwestern journal of law and social policy, 2018

Legal pluralism is "generally defined as a situation in which two or more legal systems coexist i... more Legal pluralism is "generally defined as a situation in which two or more legal systems coexist in the same social field." 1 One type of legal pluralism occurs when a group of people is subject to both the law of its country and to a religious law. Practicing Muslims in the United States are in this situation-they must fulfill numerous personal obligations imposed by Islamic law within the context of the American legal system. Doing so is usually not difficult; however, it causes significant problems in at least one area: calculating their annual almsgiving (zakāt) required by Islamic law. Muslim jurists disagree about how much zakāt should be paid on certain modern financial assets created by American corporate, securities, and tax law, such as publicly traded stocks and 401(k) retirement accounts. As a result, American Muslims can choose from a wide range of zakāt calculation opinions, which are usually presented on the internet without a framework of legal reasoning. This causes inequity, confusion, and creates a moral hazard for American Muslims that threatens to undermine the societal and spiritual purposes of zakāt. Zakāt is a mandatory almsgiving in Islam. As one of the five central "pillars" of Islam, paying zakāt is one of the most important religious obligations of Muslims. 2 Each year, Muslims whose wealth exceeds their basic needs must donate a specified portion of their financial assets and certain tradable assets, such as business inventories, livestock, and agricultural produce. Detailed rules exist for calculating zakāt, and these rules differ somewhat by asset type. Thus, Muslims seeking guidance regarding how much zakāt to pay have turned to Islam's scriptural sources and jurisprudential tradition, Muslim scholars and jurisconsults, and, in present times, even Islamic websites for information about these rules.

PLOS ONE, 2021

Nowadays, forensic authorship authentication plays a vital role in identifying the number of unkn... more Nowadays, forensic authorship authentication plays a vital role in identifying the number of unknown authors as a result of the world’s rapidly rising internet use. This paper presents two-level learning techniques for authorship authentication. The learning technique is supplied with linguistic knowledge, statistical features, and vocabulary features to enhance its efficiency instead of learning only. The linguistic knowledge is represented through lexical analysis features such as part of speech. In this study, a two-level classifier has been presented to capture the best predictive performance for identifying authorship. The first classifier is based on vocabulary features that detect the frequency with which each author uses certain words. This classifier’s results are fed to the second one which is based on a learning technique. It depends on lexical, statistical and linguistic features. All of the three sets of features describe the author’s writing styles in numerical forms. ...

This study aims at being acquainted with the using the body fat percentage (%BF) with body Mass I... more This study aims at being acquainted with the using the body fat percentage (%BF) with body Mass Index (BMI) as input parameters in fuzzy logic decision support system to predict properly the lifted weight for students at weightlifting class lift according to his abilities instead of traditional manner. The sample included 53 male students (age = 21.38 ± 0.71 yrs, height (Hgt) = 173.17 ± 5.28 cm, body weight (BW) = 70.34 ± 7.87.6 kg, Body mass index (BMI) 23.42 ± 2.06 kg.m-2, fat mass (FM) = 9.96 ± 3.15 kg and fat percentage (% BF) = 13.98 ± 3.51 %.) experienced the weightlifting class as a credit and has variance at BW, Hgt and BMI and FM. BMI and % BF were taken as input parameters in FUZZY logic whereas the output parameter was the lifted weight (LW). There were statistical differences between LW values before and after using fuzzy logic (Diff 3.55± 2.21, P > 0.001). The percentages of the LW categories proposed by fuzzy logic were 3.77% of students to lift 1.0 fold of their bo...

Brain Sciences, 2022

Background: The COVID-19 pandemic has reached over 276 million people globally with 5.3 million d... more Background: The COVID-19 pandemic has reached over 276 million people globally with 5.3 million deaths as of 22nd December 2021. COVID-19-associated acute and long-term neurological manifestations are well recognized. The exact profile and the timing of neurological events in relation to the onset of infection are worth exploring. The aim of the current body of work was to determine the frequency, pattern, and temporal profile of neurological manifestations in a cohort of Egyptian patients with confirmed COVID-19 infection. Methods: This was a prospective study conducted on 582 hospitalized COVID-19 patients within the first two weeks of the diagnosis of COVID-19 to detect any specific or non-specific neurological events. Results: The patients’ mean (SD) age was 46.74 (17.26) years, and 340 (58.42%) patients were females. The most commonly encountered COVID-19 symptoms were fever (90.72%), cough (82.99%), and fatigue (76.98%). Neurological events (NE) detected in 283 patients (48.63...

Back ground:Gold nanoparticles (GNPs) offer a great promise in biomedicine. Currently, there is n... more Back ground:Gold nanoparticles (GNPs) offer a great promise in biomedicine. Currently, there is no data available regarding the toxicity of GNPs .ROS and free radical production is one of the primary mechanisms of nanoparticle toxicity.The present in vivo study investigated the toxicological effects of size-sorted GNPs along four different time intervals at the cellular levels that include liver, spleen and blood cells through biophysical and biochemical studies, these studies were confirmed by histopathological studies Animals and Methods:Adult SpragueDewally male rats weighting (100120g) received intraperitoneal injection of colloidal gold nanoparticles of different sizes(10,50,100nm) that were repeated day by day .Animals were scarified after (14,21,30 and 40) blood samples ,liver and spleen were collected. The parameters studied included: measuring of whole blood viscosity , RBCs aggregation parameters, hepatic lipid peroxidation, Super oxide dismutase (SOD), glutathione (GSH), ...

Merchant marine officers have multiple specific duties and responsibilities to perform. Moreover,... more Merchant marine officers have multiple specific duties and responsibilities to perform. Moreover, there is a need for a well-trained workforce to operate modern ships. In this era, the development of technological tools to assist in the delivery of the syllabus, and develop the marine cadets’ practical knowledge during training on-board is highly required. This study reviewed literature concerning Maritime Education and Training, in addition to personalised learning and online mobile learning. The research proposes the creation, assessment and validation of generic Interactive Maritime Education and Training (iMET) application, that is utilising Near Field Communication (NFC) technology, as a personalised interactive self-study mobile tool, with respect to cadets’ different learning preferences. The main aim of this research is to test the hypothesis that, the iMET tool has a direct positive impact on the Maritime Education and Training process on-board the training ship, and it is ...

Santa Clara law review, 2015

Nearly everyone who purchases a product that offers a mail-in rebate intends to redeem the rebate... more Nearly everyone who purchases a product that offers a mail-in rebate intends to redeem the rebate. Yet most consumers, including those who purchased the product because of the mail-in rebate, never submit the materials required to receive their rebates. Thus, prominent legal scholars propose requiring rebate offers to disclose actual redemption rates. The idea, of course, is that such disclosures will improve consumers’ purchase decisions by causing consumers to realize that they too are unlikely to redeem rebates. But is this what would really happen? We report the results of a controlled experiment that examines the effects of such disclosures on U.S. consumers. Surprisingly, we find that these disclosures backfire, increasing rather than decreasing consumers’ willingness to purchase rebated products. We discuss how our experimental results inform both the rebate debate and the more general debate about the likely success of other non-restrictive legal interventions.

A field experiment was conducted at Ismailia Research Station (30 35' N latitude, 30 26' ... more A field experiment was conducted at Ismailia Research Station (30 35' N latitude, 30 26' E longitude, 20.0m above mean sea level), Egypt during the 2016 and 2017 growing seasons to study the effect of three irrigation treatments (125, 100 and 75%ETo) on forage yield and its attributes of Sudan-grass crop. The effects of irrigation levels on the amounts of applied irrigation water, water consumptive use, water productivity on forage yield and its components, as well as its yield quality were studied. Results indicated that distribution uniformity values were 76 and 78% in 1 and 2 seasons, respectively. Average amounts of applied irrigation water under 125, 100, and 75% ETo irrigation levels treatment were 4450, 3710 and 2980 m ha, respectively. While the average water consumption were 3675, 2879 and 2140 m ha, respectively. The percentages of saved water were 20 and 50% for the 100 and 75 ETo, respectively as compared with the 125% ETo treatment. Average water use efficiency ...

PLANT ARCHIVES, 2021

The study was conducted for the period 25/8/2019 and for 25/11/2019 in fish laboratory / College ... more The study was conducted for the period 25/8/2019 and for 25/11/2019 in fish laboratory / College of Agricultural Engineering Sciences / University of Baghdad to definition effect of using cooked fish offal meals and heat and solar dried intent on diets of common carp fish. 126 fingerlings with an average initial weight of 24.5 ± 0.5 g / biomass were randomly distributed to nine feeding treatments by two replicates per treatment and by seven fingerlings per replicate. Equal Nine protein and energy feeds were formulation approximately with different proportions of addition of fish offal meals (%10, %24). Respectively for all treatments except the control treatment that was free of addition and included T2, T3: thermally dried cooked offal meal and T4, T5: sun-dried, cooked offal meal and T6, T7: thermally dried un cooked offal meal and T8, T9: sun dried un cooked offal meal. The results indicated that the T4 treatment was the best laboratory treatment, and there were significant differences (P <0.01) were recorded with the control treatment T1 and the rest of the other treatments in the growth and diet criteria, We conclude from the present study to the possibility of using Fish offal meal cooked and sun-dried at a rate of %10 as a source of animal protein in diets of common carp fish without negative effects on the efficiency of nutrition, growth and at the lowest nutritional costs.

Alexandria Science Exchange Journal, 2018

Effective intercropping pattern, use of highly efficient irrigation system and proper irrigation ... more Effective intercropping pattern, use of highly efficient irrigation system and proper irrigation scheduling are one of the current challenges in agriculture sector for saving water, maximizing crop production and economic benefits. Thus, a two-year field experiment was conducted at Ismailia Research Station (30o 35' N latitude, 30o 26' E longitude, 20.0m above MSL), Egypt during the two growing seasons of 2016 and 2017 to study the effect of three irrigation treatments (1.2, 1.0 and 0.8 ETo calculated by the BIS model) and five peanut/sunflower intercropping patterns ((P1 = 100% peanut + 25 % sunflower), (P2 = 100% peanut + 33% sunflower), (P3 = 100% peanut + 50% sunflower), (P4 = sole peanut), and (P5 = sole sunflower)) on yield and its components of both crops, applied irrigation water, consumptive use, land and water productivity and net income. The experimental layout was designed in strip plot with three replicates. The results indicated that light intensity percentage significantly decreased with the 1.2 ETo treatment. The highest values of growth and yield of pod, seed and oil of peanut and sunflower were detected with the application of 1.2 ETo. Intercropping sunflower with peanut significantly reduced the yield of both crops in both seasons. However, intercropping sunflower at low density (P1) recorded the maximum values for yield and yield components of peanut, compared to the P2 and P3 treatments. The highest values of applied water (451 and 439mm) and consumptive use (403 and 415mm) were obtained in the first and second growing seasons, respectively when P3 (100% P + 50% S) was irrigated with 1.2 of ETo. Intercropping sunflower with peanut increased water use efficiency (kg/mm or cereal unit/mm) compared with sole crop. The average of water equivalent ratio was highest (1.255) produced with P3 under 1.0 ETo treatment, as average of both growing seasons. The maximum value of land equivalent ratio (1.569) and net income (L.E. 22589/ha) were recorded with P3 intercropping pattern irrigated with 1.2 of ETo treatment, on average basis of both growing seasons. Sunflower was the dominant component for the all intercropping systems, while peanut was the dominated crop. Thus, we recommend the implementation of P3 intercropping system, namely 100% peanut + 50% sunflower irrigated with 1.2 of ETo to increase land productivity in sandy soil under sprinkler irrigation or with 1.0 of ETo to save on the applied irrigation water, with yield lose were low. Under severe drought conditions, we recommended application of 0.8 ETo.

Advances in Animal and Veterinary Sciences, 2018

The blue-green algae (Spirulina platensis) is widely distributed worldwide. The nutritional value... more The blue-green algae (Spirulina platensis) is widely distributed worldwide. The nutritional value of Spirulina algae is well-documented. Spirulina has unique high protein content, about 50-70% by dry weight, and it is considered as a good source of essential amino acid. Additionally, Spirulina was recognised to have a wide range of essential nutrients, including essential fatty acids and polysaccharides, vitamins and minerals, and carotenoids.The aim of this study was to determine the injection effect of spirulina liquid extract on fertility and hatching traits, production performance, and some biochemical characteristics of quail eggs during the incubation period. Four hundred and fifty eggs were selected for hatching. The eggs were divided into three groups, and every group was treated differently. The results of the first treatment showed that there was a significant difference in the hatchability percentage of fertilized eggs. Furthermore, the percentage of failed eggs and weak chicks from the control treatment is almost significantly. The results of the second treatment showed that there was no effect on the average weight of the hatched chicks and feed conversion ratio. The third treatment showed a significant increase in the weight gain and feed consumed. It was noticed that the treatments did not have a notable effect on the relative weight of the liver, heart, and intestines. No significant differences were observed of physiological characteristics, as total protein concentration, enzymatic activity of GOT, GPT, and MDA level. The third treatment caused an increase in GSH glutathione level comparison with a control treatment. The injection of spirulina liquid extracts in late stages of incubation could improve the hatchability percentage chicks and their chances of survival. It can also strengthen the new hatch chicks immunity and antioxidants status.

Advances in Science, Technology and Engineering Systems Journal, 2017

At Microarchitectural level, multi-core processor, as a complex System on Chip, has sophisticated... more At Microarchitectural level, multi-core processor, as a complex System on Chip, has sophisticated on-chip components including cores, shared caches, interconnects and system controllers such as memory and ethernet controllers. At technological level, architects should consider the device types forecast in the International Technology Roadmap for Semiconductors (ITRS). Energy simulation enables architects to study two important metrics simultaneously. Timing is a key element of the CPU performance that imposes constraints on the CPU target clock frequency. Power and the resulting heat impose more severe design constraints, such as core clustering, while semiconductor industry is providing more transistors in the die area in pace with Moore's law. Energy simulators provide a solution for such serious challenge. Energy is modelled either by combining performance benchmarking tool with a power simulator or by an integrated framework of both performance simulator and power profiling system. This article presents and asses trade-offs between different architectures using four cores battery-powered mobile systems by running a custom-made and a standard benchmark tools. The experimental results assure the Energy/ Frequency convexity rule over a range of frequency settings on different number of enabled cores. The reported results show that increasing the number of cores has a great effect on increasing the power consumption. However, a minimum energy dissipation will occur at a lower frequency which reduces the power consumption. Despite that, increasing the number of cores will also increase the effective cores value which will reflect a better processor performance.

Portugaliae Electrochimica Acta, 2004

The rate of copper II/zinc cementation from copper sulphate solutions in the absence and in the p... more The rate of copper II/zinc cementation from copper sulphate solutions in the absence and in the presence of methanol (CH 3 OH) and dimethyl sulphoxide (DMSO) has been studied and the reaction was found to follow first-order kinetics. The influence of several parameters on the course of the reaction, such as cylinder rotation speed, initial concentration of Cu 2+ ions, temperature and concentration of organic solvent, was investigated. In the case of CH 3 OH, rotating zinc cylinder was used, while in the presence of DMSO stationary zinc sheet and rotating zinc cylinder were used. It was found that (1) the percentage inhibition caused by methanol ranged from 10.70 to 58.38 depending on the concentration of the alcohol used; (2) the rate of cementation in the presence of DMSO using rotating zinc cylinder > the rate of cementation in the presence of DMSO using stationary zinc sheet; (3) the rate of cementation on zinc cylinder in the presence of DMSO < the rate of cementation in the presence of CH 3 OH. Different reaction conditions, and the physical properties of solutions are studied to obtain dimensionless correlation among all these parameters. Thermodynamic parameters ∆S*, ∆H* and ∆G* were studied.

Advances in Natural Sciences: Nanoscience and Nanotechnology, 2015

One-dimensional (1D) porous carbon nanofibers (CNFs) decorated by silver (Ag) nanoparticles (NPs)... more One-dimensional (1D) porous carbon nanofibers (CNFs) decorated by silver (Ag) nanoparticles (NPs) were prepared using a one-pot/self-template synthesis strategy by combining electrospinning and carbonization methods. The characterization results revealed that AgNPs were homogenously distributed along the CNFs and possessed a relatively uniform nano-size of about 12 nm. The novel membrane distinctively displayed enhanced photocatalytic activity under visible-light irradiation. The membrane exhibited excellent dye degradation and bacteria disinfection in batch experiments. The high photocatalytic activity can be attributed to the highly accessible surface areas, good light absorption capability, and high separation efficiency of photogenerated electron–hole pairs. The as-prepared membranes can be easily recycled because of their 1D property.

Proceedings of the 11th ACM on Asia Conference on Computer and Communications Security, 2016

Advances in Operations Research, 2015

This paper presents a new hybrid of Bat Algorithm (BA) based on Mutual Information (MI) and Naive... more This paper presents a new hybrid of Bat Algorithm (BA) based on Mutual Information (MI) and Naive Bayes called BAMI. In BAMI, MI was used to identify promising features which could potentially accelerate the process of finding the best known solution. The promising features were then used to replace several of the randomly selected features during the search initialization. BAMI was tested over twelve datasets and compared against the standard Bat Algorithm guided by Naive Bayes (BANV). The results showed that BAMI outperformed BANV in all datasets in terms of computational time. The statistical test indicated that BAMI has significantly lower computational time than BANV in six out of twelve datasets, while maintaining the effectiveness. The results also showed that BAMI performance was not affected by the number of features or samples in the dataset. Finally, BAMI was able to find the best known solutions with limited number of iterations.

Proceedings of the third ACM conference on Data and application security and privacy, 2013

Smartphones have become very popular and versatile devices. An emerging trend is the integration ... more Smartphones have become very popular and versatile devices. An emerging trend is the integration of smartphones into automotive systems and applications, particularly access control systems to unlock cars (doors and immobilizers). Smartphone-based automotive solutions promise to greatly enhance the user's experience by providing advanced features far beyond the conventional dedicated tokens/transponders. We present the first open security framework for secure smartphone-based immobilizers. Our generic security architecture protects the electronic access tokens on the smartphone and provides advanced features such as context-aware access policies, remote issuing and revocation of access rights and their delegation to other users. We discuss various approaches to instantiate our security architecture based on different hardware-based trusted execution environments, and elaborate on their security properties. We implemented our immobilizer system based on the latest Android-based smartphone and a microSD smartcard. Further, we support the algorithmic proofs of the security of the underlying protocols with automated formal verification tools.