Browsing Mathematics, Statistics & Physics by Title
Now showing items 616-635 of 683
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Some new results on universal metric spaces
( Chiang Mai University , 2017 , Article)In this paper we establish some common fixed point results for two self-mappings f and g on a universal metric space of dimension n. To prove our results we assume that f is a weakly U-contraction mapping of types Au and ... -
Some remarks concerning D∗-metric spaces
( International Scientific Research Publications , 2020 , Article)In [S. Sedghi, N. Shobe, H. Y. Zhou, Fixed Point Theory Appl., 2007 (2007), 13 pages], Sedghi et al. introduced the notion of D∗ -metric space and in [S. Sedghi, N. Shobe, A. Aliouche, Mat. Vesnik, 64 (2012), 258–266] the ... -
Spatial Covariate Adjusted Survival Rates for Middle East Respiratory Syndrome (Mers) Coronavirus in the Arabian Peninsula
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)The frequent outbreaks of novel or emerging infectious diseases are alarming. There is a need for urgent and appropriate intervention that can be adapted quickly for such diseases. Middle East respiratory syndrome coronavirus ... -
Spatial modelling of contribution of individual level risk factors for mortality from Middle East respiratory syndrome coronavirus in the Arabian Peninsula.
( Public Library of Science , 2017 , Article)Middle East respiratory syndrome coronavirus is a contagious respiratory pathogen that is contracted via close contact with an infected subject. Transmission of the pathogen has occurred through animal-to-human contact at ... -
Spatially Correlated Time Series and Ecological Niche Analysis of Cutaneous Leishmaniasis in Afghanistan.
( MDPI , 2017 , Article)Leishmaniasis is the third most common vector-borne disease and a very important protozoan infection. Cutaneous leishmaniasis is one of the most common types of leishmaniasis infectious diseases with up to 1.2 million ... -
Spatiotemporal algebraically localized waveforms for a nonlinear Schrödinger model with gain and loss
( Elsevier B.V. , 2017 , Article)We consider the asymptotic behavior of the solutions of a nonlinear Schrödinger (NLS) model incorporating linear and nonlinear gain/loss. First, we describe analytically the dynamical regimes (depending on the gain/loss ... -
Spectral-based optimal output-feedback boundary control of a cracking catalytic reactor PDE model
( Taylor and Francis Ltd. , 2024 , Article)This research paper focuses on the design of a boundary optimal controller with output feedback for a tubular catalytic cracking reactor. The process is represented by a set of non-linear parabolic partial differential ... -
Spinel ferrite nanoparticles for H2S gas sensor
( Springer Verlag , 2017 , Article)We investigate H2S gas sensors based on spinel ferrite CuFe2O4 nanoparticles prepared by the co-precipitation method. This technique is an efficient and fast technique to produce nanoparticles. Furthermore, those nanoparticles ... -
Stagnation point flow study with water based nanoparticles aggregation over a stretching sheet: numerical solution
( American Scientific Publishers , 2016 , Article)Intention of the current study is to examined the two dimensional stagnation point flow of waterbased nanofluid towards a stretching sheet. To simplify the problem similarity transformations are smearing on basic boundary ... -
Standard numerical schemes for coupled parallel flow over porous layers
( Elsevier , 2007 , Article)In this work, we develop finite difference schemes of various orders of accuracy that are suitable for the simulation of flow through and over porous layers. The flow through the porous layer is assumed to be governed by ... -
Statistical analysis for the impact of smoking on the behavior and health of Qatari adolescents
( De Gruyter , 2018 , Article)The links between the use of tobacco and health risks are well known. Most of the younger smokers reside in Asia which includes Qatar, the focus country of this study. Cigarette smoking among children is rising at an ... -
Statistical estimate of radon concentration from passive and active detectors in Doha
( MDPI AG , 2018 , Article)Harnessing knowledge on the physical and natural conditions that affect our health, general livelihood and sustainability has long been at the core of scientific research. Health risks of ionising radiation from exposure ... -
Strange non-dissipative and non-chaotic attractors and Palmer’s deterministic quantum mechanics
( Elsevier Ltd , 2008 , Article) -
Structural evaluation, preliminary in vitro stability and electrochemical behavior of apatite coatings on Ti6Al4V substrates
( Elsevier Ltd , 2016 , Article)Medical-grade alloys, such as Ti-6Al-4V, have been used for fixation of fractured bone and for the total replacement of defective bone. Their bioactivity could be improved by applying a bone-like apatite layer onto their ... -
Structural influence of chromium substituted magnetite ferrofluids on the optical and antibacterial characteristics
( Elsevier Ltd , 2023 , Article)A series of chromium substituted magnetite (CrxFe1?xFe2O4) ferrofluids with various concentrations ranging from x = 0-0.8 is reported in this work. Simple, cost effective and gentle co-precipitation method is followed for ... -
Student perspectives on the integration of artificial intelligence into healthcare services
( SAGE Publications Inc. , 2023 , Article)Background: Healthcare workers are often overworked, underfunded, and face many challenges. Integration of artificial intelligence into healthcare service provision can tackle these challenges by relieving burdens on ... -
Students Impression About Using Mobile Phones in Classroom
( Kassel University Press GmbH , 2020 , Article)Mobile phones are widely used by university students and there is a controversial topic whether students should be able to use them freely during lectures. A survey was distributed seeking student opinions on using mobile ... -
Study on ferroelastic characteristics of gamma irradiated lithium potassium sulfate crystal
( Elsevier , 1999 , Article)A detailed study of the optical absorption vs. γ-irradiation dose for lithium potassium sulfate crystal, LiKSO4 cut out perpendicular to x, y and z directions is presented. The optical density was measured within the ... -
SU (5) with nonuniversal gaugino masses
( World Scientific Publishing Co. Pte Ltd , 2018 , Article)We explore the sparticle spectroscopy of the supersymmetric SU(5) model with nonuniversal gaugino masses in light of latest experimental searches. We assume that the gaugino mass parameters are independent at the GUT scale. ... -
A superconducting millimetre switch with multiple nano-bridges
( International Symposium on Space Terahertz Technology , 2014 , Conference Paper)In this paper, we describe the design of a planar superconducting on/off switch comprising a high normal resistance nano-bridge deposited across a slotline transmission line. We present preliminary experimental results ...