Umm al-Qura University

Design and Optimization of Smart-Grid-Connected Microgrids for EV Charging Stations Integrating Net Energy Metering and Demand Response

The widespread adoption of EVs is expected to intensify peak demand, stress distribution networks, and increase carbon emissions if traditional grid-based charging models continue. Therefore, this study proposes a smart-grid-connected microgrid (MG) architecture for EV charging s...

Effectiveness of plasma atherogenic index as a predictor of cardiovascular risk in patients with metabolic syndrome and related cardiometabolic conditions: a systematic review.

Metabolic syndrome (MetS) and cardiovascular-kidney-metabolic syndrome represent escalating global health challenges characterized by complex lipid derangements. While traditional lipid panels are standard, the atherogenic index of plasma (AIP) has emerged as a potentially superi...

Tailored novel nanocomposites for advanced disposal of crystal violet dye from water

Crystal violet is a toxic cationic dye that poses substantial threats to aquatic biota and public health because of its persistence, bioaccumulation potential, and documented cytotoxic and carcinogenic effects. Efficient removal of this pollutant from contaminated water therefore...

A Feature‐Enhanced Artificial Neural Network‐Assisted Adaptive Truncated EWMA Control Chart for Robust Monitoring of Contaminated Processes

ABSTRACT The use of conventional memory‐type control charts can be significantly hindered by the presence of outliers and contaminated observations, as these can lead to excessive false alarms and be difficult to detect true process shifts. To tackle the aforementioned problems,...

DFT supported experimental evaluation of air oxidation converting a thiosemicarbazone oxidovanadium(IV) to a dioxidovanadium(V) complex

Two novel vanadium complexes, viz., an oxidovanadium(IV) complex [VO(HL)(acac)] (1) and a dioxidovanadium(V) complex [VO₂(HL)(H₂O)] (2), were synthesized using the tridentate ONS-donor Schiff base ligand H₂L (N-(dehydroacetic acid)-4-phenyl-3-thiosemicarbazone). The complexes wer...

Petroselinic acid: a rare fatty acid with emerging roles in nutrition, green chemistry and bio-industry

Petroselinic acid (PeA), a rare monounsaturated fatty acid (C18:1Δ6), has garnered scientific interest due to its unique cis-Δ6 double bond configuration and limited botanical distribution. Predominantly found in the Apiaceae family (e.g., parsley, coriander, dill), PeA exhibits...

Unilateral Balance, Muscular Strength, Foot Arch Status, and Physical Performance in Young Adults with and Without Low Back Pain

Background/Objectives: Low back pain (LBP) is a major cause of disability worldwide. In Saudi Arabia, research has predominantly focused on its prevalence and associated risk factors, with comparatively limited evidence directly comparing balance, muscular strength, foot characte...

Pregabalin-associated adverse drug reactions

Pregabalin is widely used for neuropathic pain, epilepsy, and anxiety disorders but has become increasingly associated with misuse and dependence. Understanding its global safety profile is essential to support pharmacovigilance and toxicovigilance efforts. This study aimed to ch...

Multiscale finite element modeling of macro-encapsulated phase-change material in 3D-Printed concrete walls under Riyadh climatic conditions

Phase-change materials (PCMs) are widely used in building systems to control indoor temperature fluctuations and improve energy efficiency. This study conducts a multiscale finite element investigation of the thermal performance of three-dimensional (3D) printed concrete walls in...

Quality by Design‐Guided Transethosomal Gel of Donepezil Hydrochloride and Quercetin for Potential Alzheimer's Management: Stability‐Indicating Eco‐Compatible RP‐HPLC Method

ABSTRACT Alzheimer's disease requires innovative therapeutic strategies that not only alleviate symptoms but also protect neurons. Donepezil hydrochloride, a cholinesterase inhibitor, and quercetin, a potent antioxidant, were co‐formulated into a transethosomal gel to enhance bra...

Behavioral and Clinical Correlates of Poor Sleep and Anxiety Symptoms in Adults Aged 50 Years and Older: A Cross-Sectional Study

Background/Objectives: Sleep quality, anxiety symptoms, physical activity, musculoskeletal pain, and multimorbidity are interrelated health domains, but evidence examining these factors together among adults aged ≥50 years in Saudi Arabia remains limited. This study described the...

Exploring memory effects and chaotic transitions in the fractional–order Bogoyavlenskii dynamical system

We explore the fractional form of the Bogoyavlenskii equation in this work using the modified version of the Riemann-Liouville fractional derivative operator introduced by Jumarie to reveal the memory and hereditary properties of the fractional dynamical systems. This analytical...

Quad port MIMO antenna design for WLAN and N78 application using regression machine learning validation

This paper presents the design and analysis of a compact four-port MIMO antenna intended for 5G communication systems, specifically targeting the n78 band (3.5 GHz) and the WLAN band (5.25 GHz). The proposed antenna has dimensions of 88.2 mm × 88.2 mm (1.03λ 0 × 1.03λ 0 ). It ach...

Innovative development of an advanced machine learning modeling for predicting compressive strength of graphene-infused concrete: a SHAP and PDP approach

The quasi-brittle response of cementitious materials continues to limit their structural efficiency, necessitating advanced reinforcement strategies. While conventional fibers improve mechanical performance, the emergence of graphene-based nanomaterials offers new opportunities t...

Tailored novel nanocomposites for advanced elimination of methylene blue dye from water

Novel SrCO 3 /CuO/MgO/C (Abbreviated as CSM600) and SrCO 3 /CuO/MgO/Sr 2 CuO 2 CO 3 /Cu 2 SrO 3 /SrCuO 2 /C (Abbreviated as CSM800) multiphase nanocomposites were successfully synthesized through a Pechini sol–gel route followed by calcination at 600 and 800 °C. Structural analys...

Protective Effects of Prenatal Bacopa monnieri Extract Against Valproic Acid-Induced Autism-like Behavioral and Neurohistological Alterations in Mice

Autism spectrum disorder (ASD) is a neurodevelopmental condition characterized by impaired social communication and repetitive behaviors. Oxidative stress is increasingly recognized as a key contributor to the neuro-degeneration and behavioral abnormalities associated with ASD. B...

Phytochemical profile and in vitro antimicrobial, antiviral, and anticancer activities of Echium angustifolium ethanolic extract

Echium angustifolium is traditionally valued for its therapeutic properties; yet comprehensive studies on its biological activities are limited. Aerial flowering parts were sequentially extracted with solvents of varying polarity. Extracts were analyzed for yield, phytochemical c...

A numerical study of non-Newtonian blood-based hybrid nanofluid flow over a stretching cylinder with Cattaneo–Christov heat flux and homogeneous heterogeneous reactions

Non-Newtonian hybrid nanofluids have attracted considerable attention in biomedical and industrial thermal systems because of their superior heat transfer performance and complex transport characteristics. In particular, blood-based hybrid nanofluids containing copper (Cu) and al...

Evaluating the Role of MIA3 Variant rs17465637 in Coronary Artery Disease: A Comprehensive Case–Control Analysis

Objectives: Coronary artery disease (CAD) remains a leading cause of morbidity and mortality worldwide, yet population-specific evidence regarding the contribution of MIA3 genetic variation in Middle Eastern populations remains limited. This study investigated the association of...

Lipid accumulation product (LAP): a key indicator for metabolic dysregulation and inflammatory status in obesity

The Lipid Accumulation Product (LAP) is recognized as an indicator of lipid-induced cellular stress. While its predictive value for conditions like diabetes, liver disease, and metabolic syndrome is established, its specific correlations with individual metabolic and hematologica...