Umm al-Qura University

Characterizing optimal task latency in mobile edge computing both mathematically and metaheuristically

Abstract A large body of research has recently focused on minimizing task latency in mobile edge computing (MEC). Researchers in the field have typically posed the minimization exercise as a non-convex optimization problem and solved it either mathematically or metaheuristically,...

The Impact of Preexisting Cardiac Implantable Electronic Devices on the Safety of Transcatheter Tricuspid Valve Interventions: A Systematic Review and Meta-Analysis

Background: Tricuspid regurgitation (TR) increases mortality but remains undertreated due to high surgical risks. Transcatheter tricuspid valve interventions (TTVI) offer safer alternatives, improving functional status and quality of life. However, many candidates for TTVI have t...

Robust RSSI indoor localization through federated adversarial training

Wi-Fi RSSI-based indoor localization offers a practical foundation for context-aware services but is challenged by data privacy concerns and susceptibility to adversarial perturbations. This paper presents FedAdvLoc as an application-oriented federated training design that incorp...

Slow–fast nonlinear dynamics and non-normal relaxation pulses near exceptional points in an autonomous Kerr dimer

We study an active–passive Kerr dimer in which a slow saturable reservoir and unequal Kerr shifts make the optical state drive its own non-Hermitian spectral trajectory. Direct integration shows stable narrow relaxation pulses with T = 248.077 and I max = 24.604 , preceded by fin...

Green HR Accountability and Redistribution Mechanisms: Scale development and validation

This study introduces and validates the Green HR Accountability and Redistribution Mechanisms model, a new framework for understanding the unintended consequences of Green Human Resource Management. Drawing on the labor process tradition, Green HR Accountability and Redistributio...

Spectrofluorometric determination of nasal cGMP using a propidium iodide supramolecular probe for diagnosis and monitoring of chronic olfactory dysfunction

Abstract Cyclic guanosine monophosphate (cGMP) serves as a critical second messenger in olfactory signal transduction. This study developed and validated a novel, highly sensitive spectrofluorometric method for cGMP determination in human nasal secretions based on its site-specif...

Unseen barriers to home healthcare: a qualitative study of providers’ perspectives from Saudi Arabia

This study investigated the challenges of providing care in Home Health Care (HHC) settings in Saudi Arabia. We employed a qualitative design and used thematic analysis to identify patterns and themes in the data supplemented with selected techniques commonly associated with grou...

Bending analysis of circular plates under a refined Lord–Shulman fractional theory with variable thermal conductivity

This article examines the bending response of a circular plate under thermoelastic conditions using a refined Lord–Shulman fractional theory incorporating variable thermal conductivity. The analysis considers three theoretical frameworks: the simple classical thermoelasticity the...

Job satisfaction among Saudi and Non-Saudi critical care and emergency nurses: associations with psychological distress, turnover intention, and perceived retention strategies

Critical care and emergency nurses work in complex and demanding environments that may affect their occupational well-being, psychological health, and job satisfaction. Although previous studies have examined nurse retention challenges, limited evidence exists regarding factors a...

From Cadastre to Canopy: Assessing Land Administration Readiness for Nature-Based Solutions in Saudi Arabia

Saudi Arabia has committed to one of the world’s largest urban greening programmes, yet whether its land administration system can hold, value, and sustain the resulting assets remains unexamined. This study assesses that readiness under Vision 2030 and SDG 11, with Riyadh as the...

Exploring the multifaceted therapeutic potential of linalool in triple negative breast cancer integrating in vitro, in silico, and network pharmacology approaches

A very aggressive type of breast cancer is triple-negative breast cancer (TNBC), leading to few treatment options, poor prognosis, and overall survival. The current trend in the application of natural compounds, especially essential oils, is an appropriate therapeutic approach wi...

A tempered fractional Halanay inequality with feedback stabilization applications

This paper develops a tempered fractional Halanay inequality for delay systems governed by the Caputo tempered fractional derivative. The proposed comparison principle establishes a sharp decay estimate combining exponential tempering with Mittag-Leffler relaxation, while explici...

Design, RLC equivalent circuit modeling, and ML/DL-based performance prediction of a graphene MIMO antenna for 6G THz systems

Intense interest in ultra-high-speed, low-latency, and large-capacity wireless communication has accelerated the development of terahertz (THz) antenna systems for sixth-generation (6G) networks. This work presents a compact graphene-based 1 × 2 multiple-input, multiple-output (M...

The potential use of traditional singing and dancing for respiratory health promotion in Saudi Arabia: an observational study

Singing is the production of musical tones with the voice. Like breathing, it requires breath control and uses many of the same anatomical structures. This universal human behaviour has been practiced for thousands of years in various cultural contexts, including religious ceremo...

LC–MS/MS Method for Simultaneous Quantification of Zolpidem, Zopiclone, and Their Metabolites in Human Urine and Its Pharmacokinetic Application

ABSTRACT Zolpidem (Z1) and zopiclone (Z2) are widely prescribed for insomnia; but their misuse in drug‐facilitated crimes presents significant forensic and clinical challenges. This study aimed to develop and validate a simple and sensitive LC–MS/MS method, coupled with dispersiv...

Synthesis, molecular modelling, and biological evaluation of new pyrazine-oxadiazole hybrids as anticancer agents

Three various pyrazine-oxadiazole hybrids 4a-c , 7a-c , and 10a-c were synthesized by reacting the precursor, 4-(pyrazin-2-ylamino)benzohydrazide ( 2 ), with different substituted benzoic acids, aryl isothiocyanates, where the produced thiosemicarbazides cyclized with iodine/NaOH...

Motion in the ER3BP Under a Heterogeneous Triaxial Primary and a Modified Newtonian Force of the Secondary

This paper investigates the dynamical behaviour of an infinitesimal mass body moving under the gravitational influence of a heterogeneous triaxial primary body and a secondary body that produces a modified Newtonian gravitational force in the elliptic restricted three-body proble...

Efficient hardware realization of 2D-chaotic Baker map using FPGA for secure image encryption

As the digital ecosystem evolves, the widespread generation, transmission, and storage of medical images expose sensitive healthcare data to significant security threats, necessitating robust and efficient encryption techniques. While several chaos-based encryption methods have b...

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...