Investigating Islamic Studies Teachers' Attitudes Towards Utilizing Virtual Learning Environment in Distance Teaching among Primary Stage Pupils

Osama Mohamed Ahmed Salem,Mohammed bin Muthayb Al-Baqami International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.2

This research aimed at investigating Islamic Studies teachers' attitudes towards utilizing virtual learning environment in distance teaching among primary stage pupils. It also aimed at determining the statistical differences among variables due to sex, educational qualification, number of years of experience, and training sessions. This research adopted the descriptive approach. The sample consisted of male and female primary teachers of Islamic Studies (N=250) in governmental schools in Taif. The questionnaire was used as a main research tool. It included (20) items. Results showed that Islamic Studies teachers' attitudes towards utilizing virtual learning environment in distance teaching among primary stage pupils were ranked to a medium degree. There was a statistically significant difference among primary Islamic Studies teachers' attitudes due to sex variable. It was recommended to adopt more training sessions and seminars for adopting the idea of utilizing virtual learning environments among Islamic Studies teachers at boys' and girls' school in Mecca through emphasizing its significance and benefits in Teaching.

High-Performance Elevator Traction Using Direct Torque Controlled Induction Motor Drive

Osama Mohamed Arafa,Mohamed Elsayed Abdallah,Ghada Ahmed Abdel Aziz 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.3

This paper presents a detailed realization of direct torque controlled induction motor drive for elevator applications. The drive is controlled according to the well-known space vector modulated direct control scheme (SVM-DTC). As the elevator drives are usually equipped with speed sensors, flux estimation is carried out using a current model where two stator currents are measured and accurate instantaneous rotor speed measurement is used to overcome the need for measuring stator voltages. Speed profiling for a comfortable elevator ride and other supervisory control activities to provide smooth operation are also explained. The drive performance is examined and controllers’ parameters are fine-tuned using MATLAB/SIMULINK. The blocks used for flux and torque estimation and control in the offline simulation are compiled for real-time using dSPACE Microlabox. The performance of the drive has been verified experimentally. The results show good performance under transient and steady state conditions.

The Effect of an Educational Program Based on the 3D Glasses as a Technological Innovation on the Academic Achievement and Attitude towards E-Learning

Osama Mohamed Ahmed Salem,Noheir Taha Hassan Mohamed International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.1

The research aimed to identify the effectiveness of an educational program using 3D glasses as a technological innovation on academic achievement and attitude towards elearning in science in the preparatory stage. The research relied on the analytical descriptive approach and the semi-experimental approach. The research tools were the achievement test and the scale of attitude towards e-learning. An educational program was designed and produced using 3D glasses. The study sample consisted of 60 students from the second grade in the preparatory stage at the Rural Jeddah School. The research concluded to the following results: There was a satistically sigificant difference at the level of sig. (0.05) among the -mean scores of the experiemtal and control group students in the post assessment atthe level of achievement in favor of the experiemental group and therewas a satistically sigificant difference at the level of sig. (0.05) among mean scores of the experiemtal and control group students in the post assessment at the level of attitude towards e-learning in favor of the experiemental group. And it was found that the positive effect of the 3D educational program for improving the level of achievement and the attitude towards e-learning for the students. The program allowed the experimental group students to practice self-learning, interaction, and achievement according to the individual differences among them.

High-Performance Elevator Traction Using Direct Torque Controlled Induction Motor Drive

Arafa, Osama Mohamed,Abdallah, Mohamed Elsayed,Aziz, Ghada Ahmed Abdel The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.3

This paper presents a detailed realization of direct torque controlled induction motor drive for elevator applications. The drive is controlled according to the well-known space vector modulated direct control scheme (SVM-DTC). As the elevator drives are usually equipped with speed sensors, flux estimation is carried out using a current model where two stator currents are measured and accurate instantaneous rotor speed measurement is used to overcome the need for measuring stator voltages. Speed profiling for a comfortable elevator ride and other supervisory control activities to provide smooth operation are also explained. The drive performance is examined and controllers' parameters are fine-tuned using MATLAB/SIMULINK. The blocks used for flux and torque estimation and control in the offline simulation are compiled for real-time using dSPACE Microlabox. The performance of the drive has been verified experimentally. The results show good performance under transient and steady state conditions.

Heat transfer characteristics and entropy generation for wing-shaped-tubes with longitudinal external fins in cross-flow

Sayed Ahmed E. Sayed Ahmed,Osama M. Mesalhy,Mohamed A. Abdelatief 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.6

A numerical study is conducted to clarify heat transfer characteristics, effectiveness and entropy generation for a bundle of wingshaped-tubes attached to Longitudinal fins (LF) at downstream side. The air-side Re a ranged from 1.8 x 10 3 to 9.7 x 10 3 . The fin height (h f ) and fin thickness (δ) have been changed as: (2 mm ≤ h f ≤ 12 mm) and (1.5 mm ≤ δ ≤ 3.5 mm). The analysis of entropy generation is based on the principle of minimizing the rate of total entropy generation that includes the generation of entropy due to heat transfer and friction losses. The temperature field around the wing-shaped-tubes with (LF) is predicted using commercial CFD FLUENT 6.3.26 software package. Correlations of Nu a , St a , and Bejan number (Be), as well as the irreversibility distribution ratio (Φ) in terms of Re a and design parameters for the studied bundle are presented. Results indicated that, installing fins with heights from 2 to 12 mm results in an increase in Nu a from 11 to 36% comparing with that of wing-shaped tubes without fins (NOF). The highest and lowest values of effectiveness (ε) at every value of the considered Re a range are occurred at h f = 6 mm and (NOF), respectively. The wing-shaped-tubes heat exchanger with h f = 6 mm has the highest values of (ε), efficiency index (η) and area goodness factor (G a ) and also the lowest values of Φ and hence the best performance comparing with other arrangements. The minimum values of Φ are occurred at h f = 6 mm. (Be) decreases with increasing Re a for all studied h f . The heat transfer irreversibility predominates for (1800 ≤ Re a ≤ 4200) while the opposite is true for (6950 < Re a ≤ 9700). δ has negligible effect on Nu a and heat transfer irreversibility. Comparisons between the experimental and numerical results of the present study and those, previously, obtained for similar available studies showed good agreements.

Preemptive pregabalin for postoperative analgesia during minimally invasive hysterectomy: a systematic review and meta-analysis of randomized controlled trials

Ahmed Abu-Zaid,Osama Alomar,Nora F AlNaim,Fatimah Shakir Abualsaud,Mohammed Ziad Jamjoom,Latifa F AlNaim,Abdullah AMA Almubarki,Saeed Baradwan,Saud Abdullah Saud Aboudi,Faisal Khalid Idris,Meshael Fod 대한산부인과학회 2022 Obstetrics & Gynecology Science Vol.65 No.2

We aimed to perform a systematic review and meta-analysis of all randomized placebo-controlled trials (RCTs)that examined the analgesic benefits of preemptive pregabalin among patients undergoing minimally invasivehysterectomy. Five major databases were systematically screened from inception until August 29, 2021 Relevantstudies were evaluated for risk of bias. Endpoints were analyzed using the random-effects model and pooled asthe mean difference or risk ratio with a 95% confidence interval. Four studies with seven treatment arms met theinclusion criteria. The total sample size was 304 patients: 193 and 111 patients were allocated to the pregabalin andplacebo groups, respectively. Overall, the included studies revealed a low risk of bias. The summary results revealedthat the mean postoperative pain scores at rest were significantly lower in the pregabalin group than in the controlgroup at 0, 2, 4, 6, 12, and 24 hours. Moreover, the mean postoperative pain scores on movement/coughing weresignificantly lower in the pregabalin group than in the control group at 12 and 24 hours. The rate of patients whowere opioid-free postoperatively was significantly higher in the pregabalin group than in the control group. Therewas no significant difference between the groups in terms of the mean postoperative time to first rescue analgesicand the rates of adverse events. Compared with placebo, preemptive pregabalin was largely safe, and was correlatedwith superior analgesic effects in terms of lower postoperative pain scores and higher opioid-sparing effects. Additional RCTs are needed to confirm these findings.

Simulation Study of a New Approach for Field Weakening Control of PMSM

Mohamed Taha Elsayed,Osama Ahmed Mahgoub,Sherif Ahmed Zaid 전력전자학회 2012 JOURNAL OF POWER ELECTRONICS Vol.12 No.1

In this paper, the different techniques for the field weakening, also known as constant power speed range (CPSR) operation, for permanent magnet synchronous motor (PMSM) will be introduced and analysed. Field weakening of PMSM, can be done using either vector control (VC) or conventional phase in advance (CPA). Implementation of these techniques depending on some features and constrains. Most of these features and constrains came from the motor parameters. One of these constrains is the motor inductance which determining whether the motor can be driven in the CPSR or not. A new approach for the field weakening will be discussed and to be verified to overcome this constrain. The new approach will be verified through both techniques VC and CPA.

The effect of alpha-lipoic acid supplementation on anthropometric, glycemic, lipid, oxidative stress, and hormonal parameters in individuals with polycystic ovary syndrome: a systematic review and meta-analysis of randomized clinical trials

Ahmed Abu-Zaid,Saeed Baradwan,Ibtihal Abdulaziz Bukhari,Abdullah Alyousef,Mohammed Abuzaid,Saleh A. K. Saleh,Heba M. Adly,Osama Alomar,Ismail Abdulrahman Al-Badawi 대한산부인과학회 2024 Obstetrics & Gynecology Science Vol.67 No.1

This systematic review and meta-analysis aimed to examine the effect of the antioxidant alpha-lipoic acid (ALA) on various cardiometabolic risk factors and hormonal parameters in patients with polycystic ovary syndrome (PCOS). We searched PubMed, EMBASE, SCOPUS, Cochrane Library, and Web of Science databases without language restrictions until May 2023 to find randomized controlled trials (RCTs) that assessed the impact of ALA supplementation on anthropometric, glycemic, lipid, oxidative stress, and hormonal parameters in women with PCOS. Outcomes were summarized using the standardized mean difference (SMD) and 95% confidence interval (CI) in a random-effects model. An I2 statistic of >60% established significant between-study heterogeneity. The overall certainty of the evidence for each outcome was determined using the grading of recommendations, assessment, development, and evaluations system. Seven RCTs met the inclusion criteria. The ALA group had significant reductions in fasting blood sugar (fasting blood sugar (FBS), n=7 RCTs, SMD, -0.60; 95% CI, -1.10 to -0.10; I2=63.54%, moderate certainty of evidence) and homeostatic model assessment for insulin resistance (homeostatic model assessment of insulin resistance (HOMA-IR), n=4 RCTs, SMD, -2.03; 95% CI, -3.85 to -0.20; I2=96.32%, low certainty of evidence) compared with the control group. However, significant differences were observed between the groups in body mass index, insulin, estrogen, follicle-stimulating hormone, luteinizing hormone, testosterone, low-density lipoprotein, highdensity lipoprotein, triglyceride, total cholesterol, malondialdehyde, or total antioxidant capacity profiles. ALA supplementation improves FBS and HOMA-IR levels in women with PCOS. ALA consumption is an effective complementary therapy for the management of women with PCOS.

Early and Late Functional Outcomes of Anal Sphincter-Sparing Procedures With Total Mesorectal Excision for Anorectal Adenocarcinoma

Osama Eldamshety,Sherif Kotb,Ashraf Khater,Waleed Elnahas,Sameh Roshdy,Mohamed S. Zahi,Hend M.H. Rashed Elkalla,Omar Farouk,Ahmed Senbel,Adel Fathi,Emad-Eldeen Hamed,Khaled Abdelwahab,Islam A. Elzahby 대한대장항문학회 2020 Annals of Coloproctolgy Vol.36 No.3

Purpose: The study aims to assess the functional outcome of anal sphincter-sparing procedures (SSP) with total mesorectal excision (TME) for anorectal adenocarcinoma. Methods: In a multicentric, prospective, single-group study in the period between December 2012 and November 2017, 93 patients presented with anorectal adenocarcinoma were included in the study. Sixty-nine patients underwent SSP with TME. SSP included the combined approach of transabdominal TME with intersphincteric resection (ISR) or transanal transabdominal TME. Using the per anal examination scoring system (PASS), postoperative anal function was assessed after 1 year. Results: Bowel motility time was 50±19 hours. The time needed for narcotic analgesia was 54±18.8 hours. Mean hospital stay was 15.4±10.25 days. Incidence of evident fecal incontinence after ISR is 10.6% (7 of 67 cases). The PASS findings of 69 cases are as follows: extremely hypotonic 8.6% (6 cases), slightly hypotonic 26.1% (18 cases), normal tone 58% (40 cases), slightly stenotic 3 cases (4.3%), or occluded 2.9% (2 cases). Urinary dysfunction occurred in 1 case (1.4%). Temporary diversion was performed in 61 patients (87.1%). Conclusion: Sphincter preservation with TME for anorectal adenocarcinoma helps avoid permanent stoma and provides reasonable functional outcomes. PASS is a new application for postoperative assessment of anal function.

The impact of omeprazole on mycophenolate pharmacokinetics in kidney transplant recipients

( Mohamed S. Abdelhalim ),( Ahmed S. Kenawy ),( Heba H. El Demellawy ),( Amany A. Azouz ),( Sarah S. Alghanem ),( Torki Al-otaibi ),( Osama Gheith ),( Mohamed Abd Elmonem ),( Mohammed K. Afifi ),( Rag 대한신장학회 2020 Kidney Research and Clinical Practice Vol.39 No.4

Background: The absorption rates of mycophenolate mofetil (MMF) and enteric-coated mycophenolate sodium (ECMPS) may be influenced by the concomitant use of omeprazole. Methods: One hundred kidney transplant patients were recruited during their outpatient visits, including 50 on MMF and 50 on EC-MPS. At the clinic, a predose mycophenolic acid (MPA) sample (C0) was collected; subsequently, the participants received the proton-pump inhibitor omeprazole along with either MMF or EC-MPS. Two more blood samples were collected at 1.5 and 3.5 hours and used to estimate an area under the curve (AUC) from zero to 12 hours [AUC (0-12)]. Results: The mean number of months after transplant was 92 months. The median AUC (0-12) and C0 results were 62.2 mg·h/L and 2.0 mg/L for the MMF group and 71.9 mg·h/L and 1.8 mg/L for the EC-MPS group (P = 0.160 and 0.225, respectively). Interestingly, 54% of the MMF group and 62% of the EC-MPS group showed AUCs above the target values. The correlation between MPA C0 and the predicted AUC was poor in both groups. Conclusion: Omeprazole can be safely co-administered with either MMF or EC-MPS, as it did not compromise the MPA exposure. Unexpectedly, however, a high percentage of patients presented MPA AUCs exceeding the target value, highlighting the importance of periodically assessing MPA level.