Jouf University

Structural Properties of Isosymmetric Transformations on Metric Spaces

In this paper, we introduce and study m,n;q-isosymmetric transformations on metric spaces, generalizing the notions of m;q-isometries and n;q-symmetries that have recently been investigated in the literature. Our approach combines these two metric structures within a common frame...

Network-Based Walk-Access Coverage of an Integrated Metro–Bus System: Measurement Sensitivity and Distributional Outcomes in Riyadh

Walk access determines the effective catchment of a transit system, yet coverage statistics are still commonly derived from straight-line buffers, and no network-based estimate exists for Riyadh’s newly integrated metro and bus system. This study quantifies walk-access service co...

Transcutaneous Vagus Nerve Stimulation Improves Motor Function of Upper Extremity in Adults with Chronic Ischemic Stroke: A Randomized Controlled Trial

BackgroundUpper limb motor dysfunctions are common after stroke affecting daily activities. About 60% of survivors still have impairment despite rehabilitation.ObjectiveTo assess the effect of transcutaneous auricular vagal nerve stimulation (taVNS) on upper limb motor function i...

Green Recycling of Waste Tire Rubber Crumb: Characterization and Water Treatment Applications

Discarded tires are adding to the waste problem that exists worldwide and requires proper recycling methods. Rather than employing chemicals or energy-intensive thermal treatments, which leads to an increase in environmental pollution, in this work, the discarded tires are subjec...

Influence of outdoor running surface type on loading rate and lower-limb kinematics

Abstract Background Running surface characteristics may influence loading rate and lower-limb biomechanics during running. However, evidence regarding the effects of outdoor running surfaces remains limited. Therefore, this study investigated the effects of different outdoor runn...

Bioactive essential oils as sustainable postharvest technology: suppression of sprouting and preservation of physicochemical quality in cold-stored potato tubers

Sprouting during storage represents a principal postharvest constraint for potato ( Solanum tuberosum L.), driving physiological weight loss, quality deterioration, and severe loss of marketability. Furthermore, recent regulatory restrictions on synthetic suppressants, such as ch...

Ebola Virus Persistence in Immune-Privileged Niches: Molecular Mechanisms, Host–Virus Interactions, and Therapeutic Opportunities

Ebola virus disease (EVD) has traditionally been conceptualized as an acute, fulminant illness culminating in either death or apparent systemic viral clearance. However, clinical, virological, and genomic evidence gathered since the 2013–2016 West African epidemic demonstrates th...

Distribution and Source of Metals in the Horizontal and Vertical Profiles, and Their Ecological Risk in the Red Sea Coast, Western Saudi Arabia

Metal pollution is a critical environmental challenge that endangers marine life and ecosystems worldwide. This study evaluated the metal distribution in horizontal and vertical profiles, as well as their sources in the Red Sea coast, Western Saudi Arabia, using the contamination...

Neonatal and Maternal Sepsis in Gulf Cooperation Council Countries, 1990–2023: A Global Burden of Disease Analysis and Forecast to 2050

Introduction: Sepsis remains an important cause of preventable morbidity and mortality, but long-term trends in neonatal and maternal sepsis across the Gulf Cooperation Council (GCC) have not been well characterized. Methods: We analysed Global Burden of Disease (GBD) 2023 estima...

Variable reactive power compensators versus fixed and switchable capacitor banks in providing ancillary services considering voltage fluctuations

Voltage fluctuations across distribution network buses can significantly influence both load consumption patterns and the reactive power output of compensation devices. To address these effects, strategic placement of reactive power support equipment is essential. While prior res...

Machine learning driven replication free storage optimization for wearable healthcare sensors

Wearable sensors (WS) are becoming an important tool for detecting and monitoring physical changes in humans, which, together with improved diagnostic techniques and clinical procedures, represents an important development in the clinical field. The information obtained from thes...

Addiction management and rehabilitation programs in Saudi Arabia: a scoping review of current practices and opportunities for healthcare technology integration

Substance use disorders (SUDs) represent a growing public health challenge in Saudi Arabia despite strict legal and social controls. Addiction management is primarily delivered through centralized inpatient and residential rehabilitation programs; however, the available evidence...

Structural features, activity relationships, and synthetic strategies of indole-based derivatives as antitubercular agents targeting mycolic acid biosynthesis

Tuberculosis (TB) is a severe airborne infectious disease caused by Mycobacterium tuberculosis ( M. tb ), primarily impacting the lungs and other organs. Antimicrobial resistance in TB is an emerging problem that requires immediate treatment and management. It is difficult to cur...

XGB-AGMoE: A Validation-Adaptive XGBoost-Anchored Granular Mixture-of-Experts Framework for Multi-Class Intrusion Detection in IoMT WiFi–MQTT Traffic

The Internet of Medical Things (IoMT) environment is based on WiFi and MQTT communication, which results in highly imbalanced intrusion-detection data with a high degree of heterogeneity. In this study, XGB-AGMoE is proposed, a validation-adaptive XGBoost-anchored Granular Mixtur...

Structural and optical properties of PVA/PVP polymer blend nanocomposite membrane reinforced with Zn0.08Cd0.92O nanoparticles for potential flexible optoelectronic applications

Abstract PVA/PVP polymer blend nanocomposite films incorporating Zn 0.08 Cd 0.92 O nanoparticles at concentrations ranging from 0.3 to 2.0 wt% were fabricated via the solution casting method. The structural, morphological and optical properties of the prepared films were systemat...

Insecticidal activity of Metarhizium anisopliae-mediated nanoparticles and fungal metabolites against the red palm weevil, Rhynchophorus ferrugineus

Abstract This study evaluated the insecticidal activity of green-synthesized metallic nanoparticles (Ag, CuO, and ZnO) and the ethanolic extract of Metarhizium anisopliae against the red palm weevil ( Rhynchophorus ferrugineus ). Physicochemical characterization confirmed the suc...

LC-MS analysis, In-vitro & in-silico antioxidant potential and cosmeceutical application of Crocus sativus (saffron)

The skin, a prominent organ undergoing noticeable changes over time, serves as a model for unravelling ageing complexities. Reactive oxygen species (ROS) contribute to intrinsic ageing, emphasising the need for interventions targeting skin health. This research highlights the Cro...

Transient Wave Propagation in Double–Porosity Spherical Cavities: A Spatiotemporal Nonlocal Elasticity Framework with Klein–Gordon Operator

This study introduces a novel Klein–Gordon-type spatiotemporal nonlocal elasticity framework to investigate transient wave propagation in spherical cavities characterized by double porosity. Unlike classical nonlocal models that rely solely on spatial parameters, this work innova...

On the Rayleigh surface wave dynamics of porous piezo-thermoelectric smart material with spatio-temporal nonlocality and fractional higher-order three-phase-lag theory

This study examines Rayleigh-type surface wave propagation in a porous piezo-thermoelectric semi-infinite medium incorporating spatio–temporal nonlocality together with fractional higher-order three-phase-lag heat conduction. The governing equations are formulated within the fram...

Seamless grid following and grid forming inverter mode transition enabled by machine-learning based SCR estimation and smooth switching control

The increasing penetration of inverter-based resources has led to converter-dominated power systems in which grid strength varies significantly and strongly influences inverter control performance. Grid-following (GFL) and grid-forming (GFM) control strategies offer complementary...