Publications by authors named "M Almalki"
Metal halide perovskites have shown exceptional potential in converting solar energy to electric power in photovoltaics, yet their application is hampered by limited operational stability. This stimulated the development of hybrid layered (two-dimensional, 2D) halide perovskites based on hydrophobic organic spacers, templating perovskite slabs, as a more stable alternative. However, conventional organic spacer cations are electronically insulating, resulting in charge confinement within the inorganic slabs, thus limiting their functionality.
View Article and Find Full Text PDFThis paper investigates enhancing the efficiency of solar water pumping systems (SWPS) by implementing a Maximum Power Point Tracking technique based on the Bat Metaheuristic Optimizer (MPPT-bat) for the photovoltaic generator (PVG) side, coupled with Direct Torque Control (DTC) for the induction motor powering the pump. Unlike traditional techniques, which make no compromise between tracking speed, oscillation and robustness. The integration of the MPPT-bat represents a significant advance, making it possible to improve PVG performance whatever the weather conditions.
View Article and Find Full Text PDFObjective: To determine the prevalence of piriformis syndrome (PS) among undergraduate university health sciences students aged 18 to 25 and assess the significant predictors of PS regardless of its type and severe PS in particular.
Design: A cross-sectional study.
Setting: The study was conducted at a tertiary care hospital of a public university in Pakistan from December 2023 to May 2024.
Background: This study aims to perform a review by selecting, analyzing, and evaluating articles that discuss the accuracy of intraoral scanners (IOSs) in recording post space compared to conventional impression-making techniques.
Methods: The review question framed using the PITR framework (participant, index test, targeted condition, and reference standard) is as follows: What is the dimensional accuracy (T) of impressions made using intraoral scanners (I) for post space (P) compared to impressions made using conventional techniques and digitalized using extraoral scanners (R)? Four electronic databases were searched using pre-set keywords. The guidelines and strategies recommended by PRISMA formed the basis for planning, executing, and documenting this systematic review.
Article Synopsis
- Clavicle fractures are common in emergency departments, while acromioclavicular (AC) joint injuries are rare and even more so when combined with clavicle fractures.
- A 29-year-old male patient experienced both an AC joint dislocation and a midshaft clavicle fracture, leading to surgical treatment that resulted in excellent recovery and range of motion after one year.
- The case highlights the rarity of this combination of injuries and stresses the importance of timely diagnosis and investigation to achieve favorable functional outcomes, although there's still no agreement on the best treatment approach.