105 publication(s) trouvée(s)
Article scientifique
A self-adaptive memetic algorithm with Lyapunov damping for stochastic OPF: evidence from South Africa's grid crisis
This study presents Lyapunov-SQP-MA (Lyapunov-guided Sequential Quadratic Programming Memetic Algorithm), a self-adaptive memetic algorithm that embeds an online stability estimator …
Article scientifique
Modelling of South African adolescent hypertension: application of frequentist quantile regression on main effect variables and interactions
Background Childhood hypertension has become a major global public health concern. It is not only an indicator of poor cardiovascular …
Article scientifique
Diffusive predator-prey model with Beddington-DeAngelis functional response: theoretical analysis and numerical results
In this work, we consider a one-dimensional diffusive predator–prey model with a Beddington–DeAngelis functional response, formulated as a system of …
Article scientifique
Structural instability and volatility shifts in emerging-market banking equities: evidence from South Africa's big five banks
Background Banking-equity returns in emerging markets may change markedly between calm and stressed periods. This study examines structural instability in …
Article scientifique
American options under tempered space-fractional diffusion: Riesz scaling, risk-neutral pricing, and exercise boundary analysis
Pure stable log-price models with stability index γ < 2 have no finite positive exponential moment and therefore cannot be …
Article scientifique
Mathematical model analysis for dynamics and control of African cassava mosaic virus and East African cassava mosaic Cameroon virus co-infections
Introduction Cassava is a key staple crop in many developing countries but is severely affected by African cassava mosaic virus …
Article scientifique
Hierarchical Bayesian autoregressive smooth transition time series models
Background Public health policy and disease surveillance systems require accurate forecasting of infectious disease dynamics to support timely interventions and …
Article scientifique
Extinction pathways in dengue-Zika multi-pathogen systems with antibody-dependent enhancement
Introduction Antibody-dependent enhancement (ADE) creates complex multi-pathogen dynamics that fundamentally alter extinction probabilities in co-circulating dengue and Zika viruses. Methods …
Article scientifique
In-host modeling of Tfh–Tfr–fCD8+ T cell dynamics on HIV reservoir persistence
HIV persistence within germinal centers is driven by complex interactions among T follicular helper (Tfh), T follicular regulatory (Tfr), and …
Article scientifique
Time-fractional cocaine–heroin dynamics with spatially heterogeneous diffusion: analysis and fractional Parker–Sochacki approximation
Fractional reaction–diffusion models provide a powerful framework for describing dynamical systems in which memory effects and spatial interactions are significant. …
Article scientifique
Reversed degree-based graph invariants in machine learning-driven QSPR analysis of antiviral drugs
The prediction of physicochemical properties of antiviral drugs is an important challenge in pharmaceutical research due to the high cost …
Article scientifique
Assessment of robustness of linear mixed model under irregular longitudinal data
Introduction Observational data collected from electronic health records (EHR) are often obtained at irregular visit time points because the visit …
Article scientifique
An application of multiscale modeling in food-borne disease dynamics: a case study of Taenia solium cysticercosis
Introduction Food-borne diseases remain a major public health challenge, particularly in low- and middle-income countries where inadequate sanitation, poor livestock …
Article scientifique
Fuzzy midpoint–based imputation methods for non-parametric survival estimation with interval-censored data
The analysis of failure time data frequently encounters situations in which the exact time of event occurrence is unknown but …
Article scientifique
Modeling the interplay of seasonality, armed conflict, and intervention strategies on malaria transmission dynamics in Sudan
Malaria incidence has been increasing in Sudan due to the combined effects of climate change, seasonal transmission patterns, and recurring …
Article scientifique
Nonlocal elliptic equations with mixed fractional Laplacians: stability and nonexistence results
In this study, we investigate the non-existence of solutions to the non-linear elliptic equation involving mixed fractional Laplacians: ( - …
Article scientifique
Modeling the impact of WASH funding on cholera dynamics: an integrated modeling approach
Cholera remains a persistent public health challenge in many low- and middle-income countries, driven by inadequate access to safe water, …
Article scientifique
Macroeconomic transmission effects on stock market performance in Tanzania: evidence from a structural VAR analysis
This study examines the dynamic interactions between key macroeconomic indicators and stock market performance in Tanzania, a frontier market in …
Article scientifique
Analysis of mitigation strategies for respiratory syncytial virus: perspectives from mathematical modeling
Respiratory Syncytial Virus (RSV) continues to pose a serious threat to global health, especially for young children, older adults, and …
Article scientifique
Enhanced state-space estimation of long-memory commodity volatility using the Unscented Kalman Filter and variational Bayes method for non-linear modeling
This study addresses the limitations of the Kalman Filter (KF) by extending the application of the Unscented Kalman Filter (UKF) …
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