Understanding the generation and evolution of planetary magnetic fields requires a quantitative grasp of how key dynamo diagnostics respond to variations in fundamental hydrodynamic control parameters. In this study, we perform a systematic numerical investigation of convection-driven dynamo models in rotating spherical shells, using a suite of simulations spanning several orders of magnitude...
UAV-based LiDAR equipment was designed as a high-performance drone equipped with a LiDAR system, which operates on electric batteries with a period of flight up to 45 minutes (with a payload) and can transport equipment with an operational weight of 27 kg, the maximum weight of take-off being up to 50 kg. The drone control is done through an advanced system that allows monitoring its position...
Here, we generalize the 2d description of gravity theory via a self-interacting class of topological BF models to an arbitrary, even spacetime dimension, greater or equal to 8 (the 4d and 6d cases have been analyzed previously and were shown to lead to several types of couplings). Our methodology relies on a variant of deformation method based on a local cohomological BRST approach in the...
Starting from the Lagrangian formulation of a special class of interacting topological BF models in an arbitrary even spacetime dimension deduced previously by a particular deformation method, here we investigate its Hamiltonian roots in the light of the general result according to which each theory with nontrivial gauge symmetries at the Lagrangian level always originates in a system subject...
Invoking the specificity of first-order dynamics for fermionic fields and using a Darboux argument, one avoids the Dirac prescription for inferring the geometric structures of various fermionic fields on a 4-dimensional Minkowski spacetime.
The study of rotational flows of an inviscid incompressible fluid with free boundary is of high theoretical and practical interest (e.g., the evolution of surface waves on the ocean, their approximation by model equations, the dynamics of wave interactions). The vorticity is the key quantity in the analysis of the fluid motion.
We consider a two-dimensional water-wave problem with a general...
We present an updated analysis of scientific productivity in physics across the Balkan countries, continuing and expanding earlier studies based on bibliometric data. The current study is primarily based on data retrieved from the OpenAlex database, covering the period from 1996 to 2024, with an accent on last 20 years, from 2005 to 2024. To evaluate database consistency and coverage, OpenAlex...
We present the results of the numerical studies of the spectra of optical magnons in bcc Fe at room conditions (𝑇 ≈ 298 K and 𝑃 ≈ 1 bar). Recently, we modelled spectra of phonons and magnons in bcc-iron at these conditions by dynamic structure factors (DSF) calculations and with the aid of Chamati potential [1-3]. It has been shown that use of this potential developed within the embedded-atom...
In this work we present some inversion algorithms used for minimally doubled fermions and a comparative study of them in the case of a specific class of MDF: Boriçi – Creutz fermions.
We have studied three main algorithms: Biconjugate gradient stabilized method BICGStab, the Conjugate Gradient method applied to the Normal Equations CGNE and Generalized minimal residual method GMRES, used for...
Abstract
This study presents the design and implementation of a novel vehicle safety system leveraging an ESP32 microcontroller and an array of environmental and motion sensors to dynamically calculate and display optimal following distances. Addressing critical factors influencing braking performance, the device integrates real-time data on vehicle speed, ambient temperature, and humidity to...
Abstract
This study opens new directions on Traffic Modeling using Neural Networks, their limitations and exploring existing research on the use of FNN, RNN and CNN architectures in this domain. Our proposed hybrid model leverages the strengths of both CNNs for recognizing spatial patterns and RNNs for capturing temporal dependencies in traffic data. The paper details our methodology,...
We study a generalized Duffin--Kemmer equation for spin 1 particle with two characteristics, anomalous magnetic moment and polarizability in presence of external uniform magnetic and electric fields.
After separating the variables in cylindrical coordinates, we get the system of ten first order partial differential equations for 10 functions $f_i(r,z)$. To describe the $r$-dependence of...
The energy function and the equations of motion on the extended
upper Siegel-Jacobi half space of order n attached to a linear Hamiltonians
in the generators of the real Jacobi group of order n are studied. The case
n = 1 is presented separately.
Microscopy is an important field that has seen significant improvements over the last decades to overcome unique inherent limitations. Some times the physical limitations could be overcome by using computational imaging. Fourier Ptychography is a powerful computational imaging technique that overcomes the resolution limitations of traditional microscopy by combining multiple low-resolution...
