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22 Results Found

  • Article
  • Open Access
2 Citations
1,671 Views
9 Pages

24 October 2022

The objective of this paper was to present a new inverse problem statement and numerical method for the Volterra integral equations with piecewise continuous kernels. For such Volterra integral equations of the first kind, it is assumed that kernel d...

  • Feature Paper
  • Article
  • Open Access
2 Citations
531 Views
42 Pages

31 March 2025

This paper studies the boundedness and convergence properties of the sequences generated by strict and weak contractions in metric spaces, as well as their fixed points, in the event that finite jumps can take place from the left to the right limits...

  • Feature Paper
  • Article
  • Open Access
2 Citations
586 Views
31 Pages

8 July 2025

This paper studies the convergence of distances between sequences of points and that of sequences of points in metric spaces. This investigation is focused on the iterative processes built with composed self-mappings of a cyclic contraction, which ca...

  • Article
  • Open Access
883 Views
20 Pages

25 September 2025

This paper addresses first- and second-kind Volterra integral equations (VIEs) with discontinuous kernels. A hybrid method combining the Homotopy Analysis Method (HAM) and Physics-Informed Neural Networks (PINNs) is developed. The convergence of the...

  • Article
  • Open Access
9 Citations
2,013 Views
23 Pages

Integral Representation of the Solutions for Neutral Linear Fractional System with Distributed Delays

  • Hristo Kiskinov,
  • Ekaterina Madamlieva,
  • Magdalena Veselinova and
  • Andrey Zahariev

In the present paper, first we obtain sufficient conditions for the existence and uniqueness of the solution of the Cauchy problem for an inhomogeneous neutral linear fractional differential system with distributed delays (even in the neutral part) a...

  • Article
  • Open Access
1,566 Views
13 Pages

2 August 2024

This paper explores the linearized stability of nonlinear delay differential equations (DDEs) with impulses. The classical results on the existence of periodic solutions are extended from ordinary differential equations (ODEs) to DDEs with impulses....

  • Article
  • Open Access
3 Citations
1,550 Views
20 Pages

28 July 2022

In the present paper, sufficient conditions are obtained under which the Cauchy problem for a nonlinearly perturbed nonautonomous neutral fractional system with distributed delays and Caputo type derivatives has a unique solution in the case of initi...

  • Article
  • Open Access
1,280 Views
20 Pages

Specific Characteristics of Numerical Simulation of Mechatronic Systems with PWM-Controlled Drives

  • Andrey Achitaev,
  • Konstantin Timofeev,
  • Konstantin Suslov,
  • Yuri Kalachev and
  • Yuri Shornikov

1 October 2024

This paper explores the features of numerical simulation used to analyze the dynamic behaviour of drives controlled by pulse-width modulators. Modern motor control systems commonly employ pulse-width modulation. Effective numerical modelling of such...

  • Article
  • Open Access
8 Citations
1,927 Views
31 Pages

In this paper, we introduce and systematically analyze the classes of (pre-)(B,ρ,(tk))-piecewise continuous almost periodic functions and (pre-)(B,ρ,(tk))-piecewise continuous uniformly recurrent functions with values in complex Banach spaces...

  • Review
  • Open Access
3 Citations
2,650 Views
22 Pages

In this review, we outline the important results on the resistivity encountered by an electron in magnetically ordered materials. The mechanism of the collision between the electron and the lattice spins is shown. Experiments on the spin resistivity...

  • Article
  • Open Access
3 Citations
1,956 Views
12 Pages

The Numerical Solution of the External Dirichlet Generalized Harmonic Problem for a Sphere by the Method of Probabilistic Solution

  • Mamuli Zakradze,
  • Zaza Tabagari,
  • Nana Koblishvili,
  • Tinatin Davitashvili,
  • Jose Maria Sanchez and
  • Francisco Criado-Aldeanueva

19 January 2023

In the present paper, an algorithm for the numerical solution of the external Dirichlet generalized harmonic problem for a sphere by the method of probabilistic solution (MPS) is given, where “generalized” indicates that a boundary functi...

  • Case Report
  • Open Access
1,065 Views
9 Pages

Possible Drug–Radiopharmaceutical Interaction in 99mTc-Sestamibi Parathyroid Imaging

  • Tracia-Gay Kennedy-Dixon,
  • Mellanie-Anne Didier,
  • Keisha Allen-Dougan,
  • Peter Glegg and
  • Maxine Gossell-Williams

1 October 2025

Drug–radiopharmaceutical interactions can significantly alter radiotracer biodistribution, complicating diagnostic accuracy. This case report describes a 64-year-old male who underwent a Technetium-99m-methoxyisobutyl isonitrile (99mTc-MIBI) pa...

  • Article
  • Open Access
3,502 Views
12 Pages

3 June 2019

Striving for permanent alcohol abstinence can be difficult to achieve or even impossible, which in turn often results in discontinuation of treatment. The main area of interest among researchers dealing with the problem of alcohol dependence is the a...

  • Article
  • Open Access
7 Citations
6,084 Views
29 Pages

Four-Types of IIT-Induced Group Integrity of Plecoglossus altivelis

  • Takayuki Niizato,
  • Kotaro Sakamoto,
  • Yoh-ichi Mototake,
  • Hisashi Murakami,
  • Takenori Tomaru,
  • Tomotaro Hoshika and
  • Toshiki Fukushima

30 June 2020

Integrated information theory (IIT) was initially proposed to describe human consciousness in terms of intrinsic-causal brain network structures. Particularly, IIT 3.0 targets the system’s cause–effect structure from spatio-temporal grain...

  • Article
  • Open Access
6 Citations
6,840 Views
22 Pages

17 February 2016

The propagation of small perturbations in complex geometries can involve hydrodynamic-acoustic interactions, coupling acoustic waves and vortical modes. A propagation model, based on the linearized Navier–Stokes equations, is proposed. It includes th...

  • Case Report
  • Open Access
5 Citations
3,087 Views
8 Pages

3 February 2023

We report the singular case of a 31-year-old woman who developed very serious Fluphenazine-induced parkinsonism over a few days due to a doubly incongruent drug prescription by indication and dosage having been applied to a healthy subject over one w...

  • Article
  • Open Access
10 Citations
3,175 Views
15 Pages

14 July 2020

Bulk metallic glass (BMG) is a new kind of material which is made by rapid condensation of alloy. With excellent properties like high strength, high hardness, corrosion resistance, BMG is increasingly applied in mold manufacturing, weapon equipment a...

  • Article
  • Open Access
3 Citations
2,750 Views
23 Pages

Investigation of 2D Seismic DDA Method for Numerical Simulation of Shaking Table Test of Rock Mass Engineering

  • Xiaodong Fu,
  • Jingyu Kang,
  • Qian Sheng,
  • Lu Zheng,
  • Wenjie Du and
  • Haifeng Ding

17 April 2022

Since the basic theory of the discontinue deformation analysis (DDA) method was proposed, the DDA open source has gone through a long development process. At present, different kinds of programs have been widely applied in rock mass engineering such...

  • Article
  • Open Access
13 Citations
5,055 Views
12 Pages

Background: Newer personalized medicines including targeted therapies such as PARP inhibitors and CDK 4/6 inhibitors have been shown to improve the survival of breast and gynaecological cancer patients. However, efficacy outcomes may be ham5pered by...

  • Article
  • Open Access
4 Citations
6,719 Views
11 Pages

16 October 2017

The generation of clean renewable energy is becoming increasingly critical, as pollution and global warming threaten the environment in which we live. While there are many different kinds of natural energy that can be harnessed, marine tidal energy o...

  • Article
  • Open Access
15 Citations
8,558 Views
23 Pages

28 December 2021

The amount of solid and liquid organic waste and wastewater is continuously increasing all over the world. The necessity of their reuse and recycling is, therefore, becoming more and more pressing. Furthermore, the limited fossil fuel resources, in c...