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7 Results Found

  • Article
  • Open Access
3 Citations
2,656 Views
17 Pages

Axial-Symmetric Diffraction Radiation Antenna with a Very Narrow Funnel-Shaped Directional Diagram

  • Yuriy Sirenko,
  • Seil Sautbekov,
  • Merey Sautbekova,
  • Nataliya Yashina,
  • Nursaule Burambayeva and
  • Assel Begimova

5 November 2021

The paper is focused on reliable modeling and analysis of axially symmetric radiators with a very narrow (throat) funnel-shaped radiation pattern. When such a diagram is formed, a wave analogue of Smith–Purcell coherent radiation is realized—the surf...

  • Article
  • Open Access
10 Citations
3,852 Views
17 Pages

First-Principles Simulation of Dielectric Function in Biomolecules

  • Puja Adhikari,
  • Rudolf Podgornik,
  • Bahaa Jawad and
  • Wai-Yim Ching

2 October 2021

The dielectric spectra of complex biomolecules reflect the molecular heterogeneity of the proteins and are particularly important for the calculations of electrostatic (Coulomb) and electrodynamic (van der Waals) interactions in protein physics. The...

  • Technical Note
  • Open Access
24 Citations
5,981 Views
15 Pages

16 February 2021

Estimating the permittivity of heterogeneous mixtures based on the permittivity of their components is of high importance with many applications in ground penetrating radar (GPR) and in electrodynamics-based sensing in general. Complex Refractive Ind...

  • Article
  • Open Access
4 Citations
2,046 Views
37 Pages

Analytical Methods for Causality Evaluation of Photonic Materials

  • Tomasz P. Stefański,
  • Jacek Gulgowski and
  • Kosmas L. Tsakmakidis

18 February 2022

We comprehensively review several general methods and analytical tools used for causality evaluation of photonic materials. Our objective is to call to mind and then formulate, on a mathematically rigorous basis, a set of theorems which can answer th...

  • Review
  • Open Access
775 Views
27 Pages

31 December 2025

Over the past 50 years, scientific interest in electromagnetic field-biology interactions has flourished. Important experimental observations and mathematical hypotheses remain central to academic debate. Adey and Blackman found that specific electro...

  • Article
  • Open Access
359 Views
17 Pages

2 November 2025

This study introduces a new integral operator Ip,μδ that extends the traditional Rafid operator to meromorphic p-valent functions. Using this operator, we define and investigate two new subclasses: Σp+δ,μ,α, consisting o...

  • Review
  • Open Access
2 Citations
2,122 Views
82 Pages

Statistical Dynamics and Subgrid Modelling of Turbulence: From Isotropic to Inhomogeneous

  • Jorgen S. Frederiksen,
  • Vassili Kitsios and
  • Terence J. O’Kane

31 July 2024

Turbulence is the most important, ubiquitous, and difficult problem of classical physics. Feynman viewed it as essentially unsolved, without a rigorous mathematical basis to describe the statistical dynamics of this most complex of fluid motion. Howe...