Browsing Mathematics, Statistics & Physics by Title
Now showing items 173-192 of 728
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Coupled coincidence point results for (ψ,φ) -weakly contractive mappings in partially ordered Gb-metric spaces
( Hindawi Publishing Corporation , 2013 , Article)In this paper we present some coupled coincidence point results for (ψ,φ) -weakly contractive mappings in the setup of partially ordered Gb -metric spaces. Our results extend the results of Cho et al. (Fixed Point Theory ... -
Covid-19 Vaccine Protection among Children and Adolescents in Qatar.
( Massachusetts Medical Society , 2022 , Article)The BNT162b2 vaccine against coronavirus disease 2019 (Covid-19) has been authorized for use in children 5 to 11 years of age and adolescents 12 to 17 years of age but in different antigen doses. We assessed the real-world ... -
Creating textured surfaces using plasma electrolysis
( Materials Research Society , 2013 , Article)Plasma electrolysis (PE) is a combination of electrolysis and plasma discharge. Previous studies indicated that PE usually created porous surface with irregular morphology as a result of the plasma-cathode interaction that ... -
Cryptanalysis of nonlinear confusion component based encryption algorithm
( Elsevier , 2021 , Article)Recently many substitution box based encryption algorithms ensuring privacy have been proposed. Many, chaotic map based S-boxes have been generated posing high nonlinearity and strong cryptographic properties. Encryption ... -
Dark soliton scattering in symmetric and asymmetric double potential barriers
( Elsevier B.V. , 2017 , Article)Motivated by the recent theoretical study of (bright) soliton diode effects in systems with multiple scatterers, as well as by experimental investigations of soliton-impurity interactions, we consider some prototypical ... -
Dark solitons near potential and nonlinearity steps
( American Physical Society , 2016 , Article)We study dark solitons near potential and nonlinearity steps and combinations thereof, forming rectangular barriers. This setting is relevant to the contexts of atomic Bose-Einstein condensates (where such steps can be ... -
Density manifolds, geometric measures and high-energy physics in transfinite dimensions
( Elsevier B.V. , 2009 , Article)We discuss certain manifolds with density. Furthermore, we outline natural connections leading to E-infinity theory and high-energy physics from a geometric measure and transfinite dimensional theoretical viewpoints. -
Derivation of a new Merton's optimal problem presented by fractional stochastic stock price and its applications
( Elsevier Ltd , 2017 , Article)In this article, a new model of Merton's optimal problem is derived. This derivation is based on stock price presented by fractional order stochastic differential equation. An extension of Hamilton-Jacobi-Bellman is used ... -
Design, fabrication, and characterization of Hg2+ sensor based on graphite oxide and metallic nanoclusters
( Elsevier B.V. , 2018 , Article)In this paper, sensors with field-effect transistor structure have been developed to detect low concentration of mercury ions (Hg2+) in water. These sensors are based on graphite oxide decorated with silver nanoclusters, ... -
Detection of DNA Bases via Field Effect Transistor of Graphene Nanoribbon with a Nanopore: Semi-empirical Modeling
( Institute of Electrical and Electronics Engineers , 2021 , Article)DNA sequencing techniques are critical in order to investigate genes’ functions. Obtaining fast, accurate, and affordable DNA bases detection makes it possible to acquire personalized medicine. In this article, a ... -
Developing a risk prediction model for breast cancer: A Statistical Utility to Determine Affinity of Neoplasm (Sudan-CA Breast)
( BioMed Central Ltd. , 2017 , Article)Background: Breast cancer risk prediction models are widely used in clinical settings. Although most of the well-known models were designed based on data collected from western population, yet they have been utilized for ... -
Developing, implementing and improving learning outcomes assessment in Qatar's public higher education
( Hamad bin Khalifa University Press (HBKU Press) , 2014 , Article)This study reports on the development and implementation of the Student Learning Outcomes Assessment process and the system implemented at Qatar University. This system consists of two phases, initiation and enhancement, ... -
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 ... -
DFT investigation of H2S and SO2 adsorption on Zn modified MoSe2
( Elsevier , 2022 , Article)Development of decidedly sensitive and selective gas sensors is desirable to maintain control of environment quality against hazardous pollutant. The adsorption of H2S and SO2 molecules on pristine and Zn doped MoSe2 ... -
A diagnostic tool for family and marriage counseling with Muslim couples
( Springer Nature , 2022 , Article)This study aimed to describe the development and psychometric properties of a questionnaire for Muslim couples and families based on how couples view and experience marital and family issues. A questionnaire was developed ... -
Differential cryptanalysis of diffusion and confusion based information confidentiality mechanism
( Elsevier , 2022 , Article)Wireless multimedia communications have progressed significantly in recent years. As a result, there is an increasing demand for more secure media transmission to protect multimedia information. Image encryption systems ... -
Dimensional regularization of the spatial wave function for a singular contact interaction in the relativistic schrodinger equation
( Institute of Physics Publishing , 2016 , Conference Paper)Based on our previous work in PRD 89, 125023 (2014), we stress here (for the first time) the regularization of the spatial wave function for the δ-contact interaction within the relativistic Schrodinger equation. The ... -
Directionally sensitive homogeneously weighted moving average control charts
( Wiley , 2021 , Article)One-sided control charts for monitoring changes in the mean level are proposed in this paper. The proposed charts are given in the form of a homogeneously weighted moving average technique that provides efficient monitoring ... -
Disability, depression and somatization in a low back pain population
( Blackwell Publishing Asia , 2006 , Article)Objective: The aim of this study was to determine the prevalence of low back pain (LBP) in a primary care setting population and examine its association with the symptoms of depression and somatization. Methods: This ... -
Discontinuous coupling and transition from synchronization to an intermittent transient chimera state
( Sharif University of Technology , 2021 , Article)Coexistence of coherent and incoherent clusters, called chimera state, has been observed in different coupling configurations. A majority of studies have considered a static scheme for the network. In this paper, synchronization ...