Mathematics, Statistics & Physics: المرسلات الحديثة
السجلات المعروضة 401 -- 420 من 738
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On goodness-of-fit testing for Burr type X distribution under progressively type-II censoring
( Springer , 2022 , Article)In this article, we propose two goodness-of-fit test statistics for the Burr Type X distribution when the available data are subject to progressively Type-II censoring. The proposed test statistics are based on the sample ... -
Relative infectiousness of SARS-CoV-2 vaccine breakthrough infections, reinfections, and primary infections.
( Springer , 2022 , Article)SARS-CoV-2 breakthrough infections in vaccinated individuals and in those who had a prior infection have been observed globally, but the transmission potential of these infections is unknown. The RT-qPCR cycle threshold ... -
A novel method to generate key-dependent s-boxes with identical algebraic properties
( Elsevier , 2022 , Article)The s-box plays the vital role of creating confusion between the ciphertext and secret key in any cryptosystem, and is the only nonlinear component in many block ciphers. Dynamic s-boxes, as compared to static, improve ... -
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 ... -
BNT162b2 and mRNA-1273 COVID-19 vaccine effectiveness against the SARS-CoV-2 Delta variant in Qatar.
( Nature Researc , 2021 , Article)With the global expansion of the highly transmissible SARS-CoV-2 Delta (B.1.617.2) variant, we conducted a matched test-negative case-control study to assess the real-world effectiveness of COVID-19 messenger RNA vaccines ... -
Association of Prior SARS-CoV-2 Infection With Risk of Breakthrough Infection Following mRNA Vaccination in Qatar.
( American Medical Association , 2021 , Article)The effect of prior SARS-CoV-2 infection on vaccine protection remains poorly understood. To assess protection from SARS-CoV-2 breakthrough infection after mRNA vaccination among persons with vs without prior SARS-CoV-2 ... -
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 ... -
mRNA-1273 COVID-19 vaccine effectiveness against the B.1.1.7 and B.1.351 variants and severe COVID-19 disease in Qatar
(2021 , Article)The SARS-CoV-2 pandemic continues to be a global health concern. The mRNA-1273 (Moderna) vaccine was reported to have an efficacy of 94.1% at preventing symptomatic COVID-19 due to infection with ‘wild-type’ variants in a ... -
Epidemiological impact of prioritising SARS-CoV-2 vaccination by antibody status: Mathematical modelling analyses
( BMJ Publishing Group , 2021 , Article)Background Vaccines against SARS-CoV-2 have been developed, but their availability falls far short of global needs. This study aimed to investigate the impact of prioritising available doses on the basis of recipient ... -
Bayesian inference for Pr ( Y<X ) in the exponential distribution based on records
( Elsevier , 2014 , Article)We consider Bayesian estimation of the stress–strength reliability based on record values. The estimators are derived under the squared error loss function in the one parameter as well as two-parameter exponential ... -
New solitary wave and multiple soliton solutions for the time-space coupled fractional mKdV system with time-dependent coefficients
( American Scientific Publishers , 2016 , Article)In this paper, a simplified bilinear method combined with a fractional transform has been used to obtain new multiple soliton solutions for the Fractional coupled modified KdV systems with variable coefficients. These ... -
Multi-soliton solutions of the BBM equation arisen in shallow water
( International Scientific Research Publications , 2016 , Article)In this work, multiple soliton solutions and multiple singular soliton solutions are formally derived for the BBM equation. A novel transformation method combined with the Hirota's bilinear method are used to determine the ... -
A new numerical method for heat equation subject to integral specifications
( International Scientific Research Publications , 2016 , Article)We develop a numerical technique for solving the one-dimensional heat equation that combine classical and integral boundary conditions. The combined Laplace transform, high-precision quadrature schemes, and Stehfest inversion ... -
Logarithmic Bounds for Oscillatory Singular Integrals on Hardy Spaces
( Hindawi Publishing Corporation , 2016 , Article)We establish a logarithmic bound for oscillatory singular integrals with quadratic phases on the Hardy space H 1 (R n). The logarithmic rate of growth is the best possible. 2016 Hussain Al-Qassem et al. -
Selective hydrogen gas sensor using CuFe 2 O 4 nanoparticle based thin film
( Elsevier B.V. , 2016 , Article)Hydrogen gas sensors based on CuFe2O4 nanoparticle thin films are presented in this work. Each gas sensor was prepared by depositing CuFe2O4 thin film on a glass substrate by dc sputtering inside a high vacuum chamber. ... -
An algorithm approach to maximal monotone operators and pseudo-contractions
( International Scientific Research Publications , 2016 , Article)The purpose of this article is to find the minimum norm solution of maximal monotone operators and strict pseudo-contractions in Hilbert spaces. A parallel algorithm is constructed. Some analysis techniques are used to ... -
Bioinformatic analysis of human opn3 alternative promoters associated with cancer
( Natural Sciences Publishing Co. , 2016 , Article)In this bioinformatics study we analyzed the functional motifs and structural features of regulatory regions of OPN3, a member of the guanine nucleotide-binding protein (G protein)-coupled receptor super-family, which is ... -
Enhancing passive UHF RFID backscatter energy using chirp spread spectrum signals and channel shortening
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Performance of passive ultrahigh frequency radio-frequency identification (UHF RFID) systems depends on the energy level of the backscattered signal from the RF tag to the RFID reader. In the indoor environment, the ... -
A strongly secure certificateless digital signature scheme in the random oracle model
( Femto Technique Co., Ltd. , 2016 , Article)The main purpose of this paper is to provide a security proof for the certificateless digital signature scheme found in [Hassouna, Bashier, and Barry, A short certificateless digital signature scheme, International Conference ... -
Some common fixed point results of graphs on b-metric space
( International Scientific Research Publications , 2016 , Article)The aim of this paper is to present some coincidence point results and common fixed points for pair of self-mappings satisfying generalized contractive condition in the framework of b-metric spaces endowed with a graph. ...
