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Mathematical modeling of the SARSCoV-2 epidemic in Qatar and its impact on the national response to COVID-19
(
University of Edinburgh
, 2021 , Article)
Background Mathematical modeling constitutes an important tool for planning robust responses to epidemics. This study was conducted to guide the Qatari national response to the severe acute respiratory syndrome coronavirus ...
On Phase-I monitoring of process location parameter with auxiliary information-based median control charts
(
MDPI AG
, 2020 , Article)
A control chart is often used to monitor the industrial or services processes to improve the quality of the products. Mostly, the monitoring of location parameters, both in Phase I and Phase II, is done using a mean control ...
On existence and uniqueness of best proximity points for proximal β-quasi contractive mappings on metric spaces
(
Forum-Editrice Universitaria Udinese SRL
, 2021 , Article)
This paper focus on the study of the generalization of the best proximity
point theorems for non-self contractions. In fact we propose two new theorems on the
existence and the uniqueness of best proximity points for ...
Pt-doped armchair graphene nanoribbon as a promising gas sensor for CO and CO2: DFT study
(
Elsevier
, 2021 , Article)
In this work, four armchair graphene nanoribbon (AGNR) based sensor materials were built using Atomistic ToolKit Virtual NanoLab (ATK-VNL) and utilized to detect carbon monoxide (CO) and carbon dioxide (CO2) gases. First, ...
DFT investigation of H2S adsorption on graphenenanosheets and nanoribbons: Comparative study
(
Elsevier
, 2020 , Article)
Graphenenanosheet (GNS), armchair graphenenanoribbon (AGNR), and zigzag graphenenanoribbon (ZGNR) systems were investigated by first principle calculations using the density functional theory (DFT). The DFT calculations ...
SARS-CoV-2 antibody-positivity protects against reinfection for at least seven months with 95% efficacy
(
Elsevier
, 2021 , Article)
Background Reinfection with the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been documented, raising public health concerns. SARS-CoV-2 reinfections were assessed in a cohort of antibody-positive persons ...
CO, CO2, and SO2 detection based on functionalized graphene nanoribbons: First principles study
(
Elsevier
, 2020 , Article)
In this study, density functional theory (DFT) has been used to build armchair graphene nanoribbon (AGNR) gas sensor and study its capacity to detect carbon monoxide (CO), carbon dioxide (CO2), and sulfur dioxide (SO2) ...
Production of flexible nanocomposite membranes for x-ray detectors
(
Elsevier
, 2020 , Article)
Flexible membranes of poly(vinyl alcohol) (PVA) polymer and CuO nanoparticles for x-ray detection applications are reported in this work. PVA represents a polymer matrix for nanoparticles, and its flexibility and electrical ...
Oyster oscillator: a novel mega-stable nonlinear chaotic system
(
Springer
, 2021 , Article)
Designing novel mega-stable chaotic oscillators has been a hot topic of research lately. In the current paper, a two-dimensional mega-stable oscillator is presented. The oscillator has a vast amount of coexisting limit ...
A symmetric oscillator with multi-stability and chaotic dynamics: bifurcations, circuit implementation, and impulsive control
(
Springer
, 2021 , Article)
Finding chaotic oscillators with unique properties is a hot topic. In this paper, a symmetric oscillator with multi-stability is proposed. This oscillator has bounded dynamics for any initial conditions. It is also shown ...