Mathematics, Statistics & Physics
Recent Submissions
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Integrative WATSU Teaching Strategies to Foster Adaptive Mastery of Coaches and Enhance Aquatic Skills in Children With Diverse Abilities
( Routledge , 2025 , Article)Physical activities are essential for their overall health and development, yet children with disabilities often face numerous barriers that hinder their participation. Aquatic therapeutic activities, particularly WATSU, ... -
Bridging the gap: investigating discrepancies between subjective and objective sleep assessment in university students
( Taylor and Francis Ltd. , 2025 , Article)Introduction Sleep quality among university students is crucial for academic success and overall well-being. This study investigated the discrepancies between subjective and objective sleep assessment in university students ... -
Prevalence of syphilis infection among migrant workers in Qatar: a nationwide cross-sectional survey
( BMJ Publishing Group , 2024 , Article)Objectives Scant data are available on syphilis infection within migrant populations worldwide and in the population of the Middle East and North Africa region. This study investigated the prevalence of both lifetime and ... -
Cellulose-inspired approaches to sustainable EMI shielding materials: A comprehensive review
( Elsevier , 2024 , Article Review)Electromagnetic induction (EMI) shielding has become essential across various industries to counteract the detrimental impact of EMI on electronic devices and delicate machinery. Traditional EMI shielding materials, ... -
Differential protection against SARS-CoV-2 reinfection pre- and post-Omicron
( Springer Nature , 2025 , Article)The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has rapidly evolved over short timescales, leading to the emergence of more transmissible variants such as Alpha and Delta1, 2–3. The arrival of the Omicron ... -
Hepatitis C virus transmission among people who inject drugs in the Middle East and North Africa: mathematical modeling analyses of incidence and intervention impact
( Elsevier , 2025 , Article)BackgroundThe Middle East and North Africa (MENA) region is the most affected by hepatitis C virus (HCV) infection globally. This study aimed to estimate HCV incidence among people who inject drugs (PWID) in MENA and ... -
Evaluating chemiluminescent immunoassays for syphilis detection: A comparative analysis
( Elsevier , 2025 , Article)BackgroundSyphilis, caused by Treponema pallidum (TP), remains a significant global public health concern, with approximately 8 million new cases annually. Diagnosing syphilis is challenging due to its often-asymptomatic ... -
Evaluating Hospital Admission Data as Indicators of COVID-19 Severity: A National Assessment in Qatar.
( Oxford University Press , 2025 , Article)Accurately assessing SARS-CoV-2 infection severity is essential for understanding the health impact of the infection and evaluating the effectiveness of interventions. This study investigated whether SARS-CoV-2-associated ... -
Impact of a potential Chlamydia vaccine in the USA: mathematical modelling analyses.
( BMJ Publishing Group , 2024 , Article)(CT) infection is a global health challenge. New approaches are needed to control CT disease burden. An age-structured deterministic mathematical model calibrated to nationally representative population-based data was ... -
A new oscillator with mega-stability and its Hamilton energy: Infinite coexisting hidden and self-excited attractors
( American Institute of Physics Inc. , 2020 , Article)In this paper, we introduce an interesting new megastable oscillator with infinite coexisting hidden and self-excited attractors (generated by stable fixed points and unstable ones), which are fixed points and limit cycles ... -
Age could be driving variable SARS-CoV-2 epidemic trajectories worldwide
( Public Library of Science , 2020 , Article)Current geographic spread of documented severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections shows heterogeneity. This study explores the role of age in potentially driving differentials in infection ... -
A novel hybrid secure image encryption based on Julia set of fractals and 3D lorenz chaotic map
( MDPI , 2020 , Article)Chaos-based encryption schemes have attracted many researchers around the world in the digital image security domain. Digital images can be secured using existing chaotic maps, multiple chaotic maps, and several other ... -
A new megastable nonlinear oscillator with infinite attractors
( Elsevier , 2020 , Article)Dynamical systems with megastable properties are very rare in the literature. In this paper, we introduce a new two-dimensional megastable dynamical system with a line of equilibria, having an infinite number of stable ... -
A Bayesian Approach to Competing Risks Model with Masked Causes of Failure and Incomplete Failure Times
( Hindawi Limited , 2020 , Article)We present a Bayesian approach for analysis of competing risks survival data with masked causes of failure. This approach is often used to assess the impact of covariates on the hazard functions when the failure time is ... -
A new megastable chaotic oscillator with singularity
( Springer Science and Business Media Deutschland GmbH , 2020 , Article)While multistability is known as a hot topic in nonlinear dynamics, two exceptional cases of multistable systems have been investigated less: extreme multistable systems and megastable systems are two newer categories of ... -
A fractional-order model for the novel coronavirus (COVID-19) outbreak
( Springer , 2020 , Article)The outbreak of the novel coronavirus (COVID-19), which was firstly reported in China, has affected many countries worldwide. To understand and predict the transmission dynamics of this disease, mathematical models can be ... -
A novel secure occupancy monitoring scheme based on multi-chaos mapping
( MDPI , 2020 , Article)Smart building control, managing queues for instant points of service, security systems, and customer support can benefit from the number of occupants information known as occupancy. Due to interrupted real-time continuous ... -
A Power Associative Loop Structure for the Construction of Non-Linear Components of Block Cipher
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)In the symmetric key cryptography, the purpose of the substitution box is to generate confusion and hence improve the security of the whole cryptosystem. For this reason, many algebraic substitution boxes are constructed ... -
A new Tikhonov-TV regularization for optical flow computation
( SPIE , 2020 , Conference)Tikhonov regularization and total variation (TV) are two famous smoothing techniques used in variational image processing problems and in particular for optical flow computation. We consider a new method that combines these ... -
A novel symmetric image cryptosystem resistant to noise perturbation based on S8 elliptic curve S-boxes and chaotic maps
( Springer Science and Business Media Deutschland GmbH , 2020 , Article)The recent decade has seen a tremendous escalation of multimedia and its applications. These modern applications demand diverse security requirements and innovative security platforms. In this manuscript, we proposed an ...
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