Mathematics, Statistics & Physics: Recent submissions
Now showing items 381-400 of 738
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Heat Transfer Characteristics of Fractionalized Hydromagnetic Fluid with Chemical Reaction in Permeable Media
( MDPI , 2022 , Article)This manuscript optimizes the conjugate heat transfer and thermal-stress analysis for hydromagnetic Brinkman fluid with chemical reaction in permeable media. The governing equations of non-Newtonian Brinkman fluid have ... -
Simulation of natural convective heat transfer and entropy generation of nanoparticles around two spheres in horizontal arrangement
( Elsevier , 2021 , Article)Herein, laminar convective heat transfer from two horizontally arranged spheres has been evaluated by using numerical models inside water-based fluids incorporated with alumina (Al2O3), copper oxide (CuO), and copper (Cu) ... -
Numerical Simulation of Magnetic Dipole Flow Over a Stretching Sheet in the Presence of Non-Uniform Heat Source/Sink
( Frontiers Media , 2021 , Article)The main objective of current communication is to present a mathematical model and numerical simulation for momentum and heat transference characteristics of Maxwell nanofluid flow over a stretching sheet. Further, magnetic ... -
Fabrication of selective gas sensors using Fe3O4 nanoparticles decorated with CuO
( Elsevier , 2022 , Article)Metal-oxide nanoparticles are regarded as favorable candidates for different device applications including gas sensors. Decoration of nanoparticles with smaller ones of different types enables taking advantage of 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 ... -
Effect of mRNA Vaccine Boosters against SARS-CoV-2 Omicron Infection in Qatar.
( Massachusetts Medical Society , 2022 , Article)Waning of vaccine protection against coronavirus disease 2019 (Covid-19) and the emergence of the omicron (or B.1.1.529) variant of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have led to expedited ... -
Prediction of future failures in the log-logistic distribution based on hybrid censored data
( Springer , 2022 , Article)We consider the prediction of future observations from the log-logistic distribution. The data is assumed hybrid right censored with possible left censoring. Different point predictors were derived. Specifically, we obtained ... -
Production of hazardous gas sensors using spinel ferrite nanoparticles
( Hamad bin Khalifa University Press (HBKU Press) , 2018 , Conference Paper)This work reports on sensitive and selective gas sensors based on copper ferrite (CuFe2O4) nanoparticles. The nanoparticles were produced different methods including: colloid microwave assisted hydrothermal method, and ... -
Production of hazardous gas sensors using spinel ferrite nanoparticles
( Hamad bin Khalifa University Press (HBKU Press) , 2018 , Conference Paper)This work reports on sensitive and selective gas sensors based on copper ferrite (CuFe2O4) nanoparticles. The nanoparticles were produced different methods including: colloid microwave assisted hydrothermal method, and ... -
High sensitivity H2S gas sensors using lead halide perovskite nanoparticles
( Elsevier , 2022 , Article)We report the development of a high sensitivity H2S gas sensor based on perovskite nanoparticles, which can be synthesized using relatively simple solution-growth methods. The gas sensor was fabricated from the metal halide ... -
An Efficient Audio Encryption Scheme Based on Finite Fields
( IEEE , 2021 , Article)Finite fields are well-studied algebraic structures with enormous efficient properties which have applications in the fields of cryptology and coding theory. In this study, we proposed a lossless binary Galois field ... -
Universal large-order asymptotic behavior of the strong-coupling and high-temperature series expansions
( American Physical Society , 2022 , Article)For theories that exhibit second-order phase transition, we conjecture that the large-order asymptotic behavior of the strong-coupling (high-temperature) series expansion takes the form σnnb where b is a universal ... -
Efficient homogeneously weighted dispersion control charts with an application to distillation process
( Wiley , 2021 , Article)Monitoring disturbances in process dispersion using control chart is mostly based on the assumption that the quality characteristic follows normal distribution, which is not the case in many real-life situations. This paper ... -
Robust Distribution-Free Hybrid Exponentially Weighted Moving Average Schemes Based on Simple Random Sampling and Ranked Set Sampling Techniques
( Hindawi , 2021 , Article)This paper proposes new nonparametric hybrid exponentially weighted moving average (HEWMA) control charts based on simple random sampling (SRS) and ranked set sampling (RSS) techniques using the Wilcoxon rank-sum W statistic. ... -
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 ... -
Investigation of NH3 adsorption on noble metal modified MoSe2
( Elsevier , 2022 , Article)Gas pollutants represent hazard for the quality of the ambient environment, thus, the development of sensitive and selective gas sensors is essential to monitor and maintain its decent quality. The adsorption of NH3 gas ... -
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 ... -
A Novel Simulation-Based Adaptive MEWMA Approach for Monitoring Linear and Logistic Profiles
( IEEE , 2021 , Article)As a common approach in the development of control charts in Statistical Process Control (SPC), an industrial process is monitored with one or more quality characteristics using their corresponding distributions. Note ... -
Characterizing the effective reproduction number during the COVID-19 pandemic: Insights from Qatar’s experience
( International Society of Global Health , 2022 , Article)Background: The effective reproduction number, Rt, is a tool to track and understand epidemic dynamics. This investigation of Rt estimations was conducted to guide the national COVID-19 response in Qatar, from the onset ... -
Goodness-of-fit testing based on Gini Index of spacings for progressively Type-II censored data
( Taylor & Francis , 2021 , Article)In this article, we propose two new scale invariant test statistics when the available data are subject to progressively Type-II censoring. The proposed tests are based on Gini index of spacings. It is observed thorough ...
