Khazar University

Reservoir eutrophication prediction with explainable framework integrating temporal convolutional networks and bidirectional sequence modeling

Abstract Accurate prediction of total nitrogen (TN) concentration in dam reservoirs is recognized as one of the significant challenges in water resources management. In this regard, the present study, to develop an intelligent and robust modeling framework, introduced the integra...

A single-switch quadratic DC–DC converter with ultra-high voltage gain and low voltage stress on semiconductors

This study offers a single-switch ultra-high step-up DC–DC converter based on the quadratic configuration. In the proposed topology, the quadratic structure is integrated with an auxiliary circuit employing a three-winding coupled inductor. The converter obtains an enhanced volta...

Nonlinear Dynamic Analysis of Oscillatory Behavior of Graphene Nano/Microelectromechanical System Using a Hybrid Morlet Wavelet Neural Network Framework

The Nano/microelectromechanical systems (N/MEMS), particularly graphene-based devices, exhibit highly nonlinear and oscillatory dynamic behavior that is complicated to solve accurately utilizing the conventional numerical and theoretical approaches. This study aims to design an a...

Physical viability of the massive pulsar PSR J0952–0607 within a polytropic framework

We develop a relativistic model for one of the most massive pulsars, PSR J0952-0607, by constructing exact solutions of Einstein’s field equations (EFEs) within the framework of the generalized Tolman–Kuchowicz (GTK) spacetime. The stellar interior is modeled as anisotropic matte...

Pan-immune-inflammation Value as a Potential Inflammatory Marker in Autism Spectrum Disorder

Objective: Neuroinflammation and immune dysregulation are implicated in the etiology of autism spectrum disorder (ASD).This study investigated the relationship between inflammatory markers-pan-immune-inflammation value (PIV), systemic immune-inflammation index (SII), neutrophil-t...

Fermi acceleration mechanisms beyond Lorentz symmetry

Abstract We construct models for first- and second-order Fermi acceleration of particles, incorporating generic frame transformations, dispersion relations, and conservation laws. Within this framework, we study deformations of Lorentz symmetry via the $$\kappa $$ κ -Poincaré alg...

Surface and interface engineering of SnO2-based electron transport layers for high-performance and flexible perovskite solar cells

Perovskite solar cells (PSCs) have emerged as a leading photovoltaic (PV) technology, achieving rapid progress in power conversion efficiency (PCE) and promising prospects for scalable, flexible applications. Within these devices, the electron transport layer (ETL) plays a decisi...

Associations of the will to live with loneliness and psychological resilience in young and middle-aged Turkish adults

The will to live is a key motivational resource related to meaning, adaptation, and well-being. Most previous research has focused on older adults in Western countries, with limited evidence in younger populations and non-Western contexts. This study examined the relationships be...

Green energy transition and energy efficiency in Türkiye: The roles of industrial productivity and fossil fuel inefficiency

This study investigates the determinants of energy efficiency effectiveness in Türkiye within the context of green energy transition and sustainable development goals over the period 1990–2024. Despite the growing importance of sustainable energy transformation, limited attention...

A unified fixed point approach for enriched bivariate mappings with applications to volterra systems and fractional-order chaos

We develop a unified fixed point theory for enriched bivariate contractions in ordered Banach spaces and in ordered convex metric spaces. Two classes of mappings are introduced and analysed: enriched bivariate Ciric-Reich-Rus contractions ( 𝒞 B C R R C e ) and enriched bivariate...

Gravitational wave signatures and periodic orbits of a charged black hole in a Hernquist dark matter halo

Abstract In this work, we study the motion of massive test particles and the gravitational wave emission associated with periodic trajectories around a magnetically charged black hole immersed in a Hernquist dark matter halo. We begin by analyzing the effective potential and the...

Stochastic Analysis and Stability of Diabetic Population Dynamics

Modeling diabetic illness with random perturbations is the goal of this work. The proposed model consists of three classes: the pre-diabetic population, the diabetic population with complications, and the diabetic population without complications. We examined the suggested proble...

A compact 2D photonic crystal biosensor for optical detection of glioblastoma brain tissues enhanced by neural networks

Abstract In this work, a compact optical sensor based on a two-dimensional photonic crystal is proposed for detecting glioblastoma and pre-tumor brain tissues. The sensor uses a hexagonal lattice of silicon rods in air with a ring resonator structure at its center. The designed d...

Ultralight dark matter halo structures around a noncommutative Euler-Heisenberg black hole spacetime

Cosmological simulations of ultra-massive black-hole configurations in the early universe challenge the idealized assumption of vacuum black-hole solutions. In this respect, we propose noncommutative-smeared Euler-Heisenberg-type black hole solutions embedded in ultralight dark m...

Structural characterization and CO2 adsorption enhancement of synthesized calcined flower-like Mg–Al LDH@γ-Al2O3

Abstract Flower-like Mg–Al CO 3 layered double hydroxides (LDHs) grown on γ-Al₂O₃ substrates with varying Mg:Al molar ratios (2:1 and 3:1 in the precursors( were successfully synthesized via a controlled co-precipitation method. The structural morphology, composition, crystallini...

Scenario-based ESG scoring for sustainable financial investments using an advanced multi-facet fuzzy system

Sustainable financial investments are emerging as a multidimensional decision-making area that requires a holistic assessment of environmental, social, and governance (ESG) criteria. However, the literature demonstrates that the relative importance of each of these criteria on in...

Advanced industrial-scale recycling of nickel waste alloys: a driver for circular economy objectives

An eco-friendly electrochemical method of nickel alloy waste leaching was developed for circular economy. The nickel concentration was 72.11 g/L in 100 g/L HCl after 90 A·h, 60 °C and 5 A/dm2 current, while 37.37 g/L nickel was obtained in 100 g/L H₂SO₄ under these conditions. Th...

Buckling of carbon nanotubes using molecular dynamics simulation: Investigating the effect of boron doping by considering the interaction energy

This study investigates the atomic-scale stability and buckling behavior of boron-doped carbon nanotubes (CNTs) using molecular dynamics simulations. After equilibration in the NVT ensemble, we applied compressive deformation to evaluate the mechanical response and structural evo...

Stochastic delay derivatives of Newcastle disease application in epidemic model: Stability analysis and approximation

The illicit trade in wildlife for pet purposes poses a direct risk to animal populations through overharvesting, but it also serves as an indirect conduit for the spread of contagious diseases. The present study assessed the effects of the hypothetical release of captured, infect...

Exact solution to the linear Ginzburg–Landau equation for a single-band type-II superconductor confined in a thin-film structure

Abstract We solve exactly the linear Ginzburg–Landau equation for a single-band bulk superconductor confined to a thin-film structure. In order to achieve a confinement effect, we replace the constant mass with an effective mass varying with position. We break the isotropic behav...