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Computation, Volume 10, Issue 2

2022 February - 20 articles

Cover Story: Employing first-principles calculations based on density functional theory (DFT), we designed a novel two-dimensional (2D) elemental monolayer allotrope of carbon called hexatetra-carbon. In the hexatetra-carbon structure, each carbon atom bonds with its four neighboring atoms in a 2D double layer crystal structure, which is formed by a network of carbon hexagonal prisms, a semiconductor with an indirect band gap of 2.20 eV. This novel monolayer may be obtained from bilayer graphene under external mechanical strain. As a semiconductor with a moderate band gap in the visible light range, once synthesized, hexatetra-carbon shows promising applications in new opto-electronics technologies. View this paper.
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Articles (20)

  • Article
  • Open Access
19 Citations
3,614 Views
14 Pages

The problem of the optimal siting and sizing of fixed-step capacitor banks is studied in this research from the standpoint of convex optimization. This problem is formulated through a mixed-integer nonlinear programming (MINLP) model, in which its bi...

  • Article
  • Open Access
2 Citations
3,501 Views
21 Pages

Hierarchical Epidemic Model on Structured Population: Diffusion Patterns and Control Policies

  • Elena Gubar,
  • Vladislav Taynitskiy,
  • Denis Fedyanin and
  • Ilya Petrov

In the current study, we define a hierarchical epidemic model that helps to describe the propagation of a pathogen in a clustered human population. The estimation of a novel coronavirus spreading worldwide leads to the idea of the hierarchical struct...

  • Article
  • Open Access
9 Citations
3,877 Views
21 Pages

We consider kinetic energy functionals that depend, beside the usual semilocal quantities (density, gradient, Laplacian of the density), on a generalized Yukawa potential, that is the screened Coulomb potential of the density raised to some power. Th...

  • Review
  • Open Access
8 Citations
5,627 Views
23 Pages

Science Mapping the Academic Knowledge on Business Improvement Districts

  • Diogo Gaspar Silva,
  • Herculano Cachinho and
  • Kevin Ward

Business Improvement Districts (BIDs) are a contemporary urban revitalization policy that has been set in motion through international policymaking circuits. They have been presented as a panacea to the economic and social challenges facing many citi...

  • Article
  • Open Access
8 Citations
5,385 Views
16 Pages

Accuracy and Precision in Electronic Structure Computation: Wien2k and FPLO

  • Manuel Richter,
  • Seo-Jin Kim,
  • Klaus Koepernik,
  • Helge Rosner and
  • Arnulf Möbius

Electronic structure calculations in the framework of density functional theory are based on complex numerical codes which are used in a multitude of applications. Frequently, existing experimental information is used as a gauge for the reliability o...

  • Article
  • Open Access
2 Citations
2,674 Views
14 Pages

Confirming the result of a calculation by a calculation with a different method is often seen as a validity check. However, when the methods considered are all subject to the same (systematic) errors, this practice fails. Using a statistical approach...

  • Article
  • Open Access
2 Citations
4,456 Views
25 Pages

Bibliometric methods are relevant for a range of applications and disciplines. The majority of existing scholarship investigating citation and reference patterns focuses on studying research impact. This article presents a new approach to studying th...

  • Article
  • Open Access
11 Citations
3,516 Views
16 Pages

Nowadays, a prime technology in generation IV nuclear reactors, the supercritical water reactor (SCWR), is the main object of focus. The current article aims to develop a thermal hydraulic numerical model for predicting density wave oscillation (DWO)...

  • Article
  • Open Access
4 Citations
3,428 Views
15 Pages

Electromagnetic field propagation inside composite materials represents a challenge where fiber-scale simulation remains intractable using classical simulation methods. The present work proposes an original 3D simulation with a mesh resolution fine e...

  • Article
  • Open Access
2 Citations
2,952 Views
16 Pages

The focus of the present paper is on clustering, namely the problem of finding distinct groups in a dataset so that each group consists of similar observations. We consider the finite mixtures of regression models, given their flexibility in modeling...

  • Article
  • Open Access
4 Citations
4,437 Views
10 Pages

Hybrid exchange-correlation functionals provide superior electronic structure and optical properties of semiconductors or insulators as compared to semilocal exchange-correlation potentials due to admixing a portion of the non-local exact exchange po...

  • Article
  • Open Access
12 Citations
9,007 Views
26 Pages

The plane–cube intersection problem has been discussed in the literature since 1984 and iterative solutions to it have been used as part of piecewise linear interface construction (PLIC) in computational fluid dynamics simulation codes ever sin...

  • Article
  • Open Access
8 Citations
4,316 Views
13 Pages

The modulation of intermolecular interactions upon aggregation induces changes in excited state properties of organic molecules that can be detrimental for some optoelectronic applications but can be exploited for others. The time-dependent density f...

  • Article
  • Open Access
18 Citations
4,700 Views
9 Pages

Hexatetra-Carbon: A Novel Two-Dimensional Semiconductor Allotrope of Carbon

  • Mosayeb Naseri,
  • Jaafar Jalilian,
  • Dennis R. Salahub,
  • Maicon Pierre Lourenço and
  • Ghasem Rezaei

Employing first-principles calculations based on density functional theory (DFT), we designed a novel two-dimensional (2D) elemental monolayer allotrope of carbon called hexatetra-carbon. In the hexatetra-carbon structure, each carbon atom bonds with...

  • Article
  • Open Access
7 Citations
4,363 Views
21 Pages

An Efficient Method for Comparing Numbers and Determining the Sign of a Number in RNS for Even Ranges

  • Andrei Tchernykh,
  • Mikhail Babenko,
  • Egor Shiriaev,
  • Bernardo Pulido-Gaytan,
  • Jorge M. Cortés-Mendoza,
  • Arutyun Avetisyan,
  • Alexander Yu Drozdov and
  • Viktor Kuchukov

Fully Homomorphic Encryption (FHE) permits processing information in the form of ciphertexts without decryption. It can ensure the security of information in common technologies used today, such as cloud computing, the Internet of Things, and machine...

  • Article
  • Open Access
2 Citations
8,753 Views
10 Pages

Bolted joints are widely used in composite aircraft structures, for their assembly. The appropriate bolted joint configuration (hole/bolt diameter, pitch, etc.) is carefully selected during the detail design phase, where high fidelity numerical model...

  • Article
  • Open Access
3,445 Views
24 Pages

For the inverse problem in physical models, one measures the solution and infers the model parameters using information from the collected data. Oftentimes, these data are inadequate and render the inverse problem ill-posed. We study the ill-posednes...

  • Article
  • Open Access
6 Citations
3,527 Views
11 Pages

A Theoretical Survey of the UV–Visible Spectra of Axially and Peripherally Substituted Boron Subphthalocyanines

  • Al Mokhtar Lamsabhi,
  • M. Merced Montero-Campillo,
  • Otilia Mó and
  • Manuel Yáñez

The UV–visible spectra of a series of subphthalocyanines (SubPcs) characterized by three different axial substituents (An) in combination with H, F, NO2, SO2H and SO2CH3 peripheral substituents (Ri) were predicted and analyzed by means of time-...

  • Article
  • Open Access
7 Citations
3,565 Views
12 Pages

The lowest-energy singlet (S1) and triplet (T1) excited states of organic conjugated chromophores are known to be accurately calculated by modern wavefunction and Time-Dependent Density Functional Theory (TD-DFT) methods, with the accuracy of the lat...

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Computation - ISSN 2079-3197