Ahmed Draia University

Evaluation of surrogate biomarkers of memory and cognition in aging adults with vitamin B12 deficiency: A cross-sectional study.

Background: Vitamin B12 (Vit B12) is a cofactor in one-carbon metabolism, methylation reactions, myelin synthesis, and neuronal function. Its deficiency can lead to neurodegeneration and cognitive decline. This study aims to evaluate cognitive and memory-related biomarkers in oth...

Stability of a Transmission Problem for a Shear Beam Model

ABSTRACT In this paper, we consider a transmission problem for a shear beam model consisting of two different materials joined at an interface. The system is modeled by coupled hyperbolic‐elliptic equations where linear frictional damping is applied to the transverse displacement...

Vibration Analysis of 2D Porous Functionally Graded Beams With Inclined Cracks Under Thermo‐Hygro‐Mechanical Coupling

ABSTRACT This work provides an in‐depth investigation into wave propagation in functionally graded material (FGM) beams subjected to coupled thermo‐hygro‐mechanical loading. The proposed model explicitly accounts for the presence of cracks, material porosity, axial pre‐stress, an...

Physiologically-aware data generation: A differentiable HMM and frequency-domain Transformer GAN approach

The generation of multivariate medical time series, such as intensive care unit (ICU) trajectories, remains challenging because patient signals are highly heterogeneous, non-stationary, and strongly multimodal. In this paper, we present a methodological proof-of-concept for the s...

Genetic-Algorithm Optimization of Dynamic Efficiency in Bidirectional Porous Functionally Graded Beams

This study develops an analytical–evolutionary framework for optimizing the dynamic efficiency of bidirectional porous functionally graded beams. Touratier’s higher-order shear deformation theory is coupled with a real-coded genetic algorithm. The material-gradation indices in th...