Mathematics, Statistics & Physics: المرسلات الحديثة

السجلات المعروضة 321 -- 340 من 728

    • EXPLORATION of the NOVEL CORONA VIRUS TRANSITION GRAPHS with PETRINET MODELING 

      Alam, Fatima; Abdel-Salam, Abdel Salam G.; Sohail, Ayesha; Yousaf, M.; Tunç, Sümeyye ( World Scientific Publishing , 2021 , Article)
      Corona virus (CoV) is a group of viruses with non-bifurcated, single-stranded, and positive-sense RNA genomes. Apart from infecting several economically significant vertebrates (such as pigs and chickens), it is reported ...

    • A Note on Parabolic Maximal Operators along Surfaces of Revolution via Extrapolation 

      Ali, Mohammed; Al-Qassem, Hussain ( MDPI , 2022 , Article)
      Under weak conditions on the kernels, we obtain sharp Lp bounds for rough parabolic maximal integral operators over surfaces of revolution. By virtue of these bounds along with Yano’s extrapolation argument, we confirm the ...

    • Evaluating the Online Learning Experience at Higher Education Institutions 

      Abdel-Salam, Abdel Salam G.; Hazaa, Khalifa; Abu-Shanab, Emad Ahmed ( IGI Global , 2022 , Article)
      In light of recent COVID-19 pandemic, universities had to cope by resorting to online learning without previous preparation. This paper tries to investigate student satisfaction with online learning. The literature review ...

    • A novel procedure for constructing invariant subspaces of a set of matrices 

      Al-Dweik, Ahmad Y.; Ghanam, Ryad; Thompson, Gerard; Azad, Hassan ( Springer , 2022 , Article)
      A problem that is frequently encountered in a variety of mathematical contexts is to find the common invariant subspaces of a single or of a set of matrices. A new method is proposed that gives a definitive answer to this ...

    • Some coupled fixed point theorems on multiplicative metric spaces with an application 

      Hussain, Baqir; Ur Rehman, Saif; Jaradat, Mohammed M.M.; Khan, Sami Ullah; Arshad, Muhammad ( AIMS Press , 2022 , Article)
      This article aims to prove some coupled fixed point (FP) theorems for nonlinear contractive type mapping in multiplicative metric space (MM-space). Our presented work consists of the maximum type and some other expressions ...

    • Protection of Omicron sub-lineage infection against reinfection with another Omicron sub-lineage 

      Chemaitelly, Hiam; Ayoub, Houssein H.; Coyle, Peter; Tang, Patrick; Yassine, Hadi M.; ... more authors ( Nature Research , 2022 , Article)
      There is significant genetic distance between SARS-CoV-2 Omicron (B.1.1.529) variant BA.1 and BA.2 sub-lineages. This study investigates immune protection of infection with one sub-lineage against reinfection with the other ...

    • HIV incidence and impact of interventions among female sex workers and their clients in the Middle East and north Africa: a modelling study 

      Chemaitelly, Hiam; Ayoub, Houssein H.; Omori, Ryosuke; El Feki, Shereen; Hermez, Joumana G.; ... more authors ( Elsevier , 2022 , Article)
      Background: The incidence of HIV infection among female sex workers and their clients in the Middle East and north Africa is not well known. We aimed to assess HIV incidence, the contribution of heterosexual sex work ...

    • Engineering the band gap of BN and BC2N nanotubes based on T-graphene sheets using a transverse electric field: Density functional theory study 

      Roya, Majidi; Ayesh, Ahmad I. ( Elsevier , 2022 , Article)
      A new class of nanotubes formed by rolling boron nitride (BN) and boron carbonitride (BC2N) sheets in the form of T-graphene is suggested in this work. The structural and electronic properties of these nanotubes, named ...

    • Effects of Previous Infection and Vaccination on Symptomatic Omicron Infections. 

      Altarawneh, Heba N; Chemaitelly, Hiam; Ayoub, Houssein H; Tang, Patrick; Hasan, Mohammad R; ... more authors ( Massachusetts Medical Society , 2022 , Article)
      The protection conferred by natural immunity, vaccination, and both against symptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection with the BA.1 or BA.2 sublineages of the omicron (B.1.1.529) ...

    • Solving Integral Equations Using Weakly Compatible Mappings via D*-Metric Spaces 

      Butush, Roqia; Mustafa, Zead; Jaradat, M. M.M. ( MDPI , 2022 , Article)
      We introduce a new pair of mappings (S, T) on D∗-metric spaces called DS∗-W.C. and DR∗S-W.C. Many examples are presented to show the difference between these mappings and other types of mappings in the literature. Moreover, ...

    • Duration of mRNA vaccine protection against SARS-CoV-2 Omicron BA.1 and BA.2 subvariants in Qatar. 

      Chemaitelly, Hiam; Ayoub, Houssein H; AlMukdad, Sawsan; Coyle, Peter; Tang, Patrick; ... more authors ( Nature Research , 2022 , Article)
      SARS-CoV-2 Omicron BA.1 and BA.2 subvariants are genetically divergent. We conducted a matched, test-negative, case-control study to estimate duration of protection of the second and third/booster doses of mRNA COVID-19 ...

    • Harmonic image inpainting using the charge simulation method 

      Kalmoun, El Mostafa; Nasser, Mohamed M.S. ( Springer , 2022 , Article)
      It was recently reported that harmonic inpainting or Laplace interpolation when used in the context of image compression can yield impressive reconstruction results if the encoded pixels were carefully selected. Mathematically, ...

    • Simulating local fields in carbon nanotube-reinforced composites for infinite strip with voids 

      Nasser, Mohamed M. S.; Kalmoun, El Mostafa; Mityushev, Vladimir; Rylko, Natalia ( Springer , 2022 , Article)
      A numerical simulation of the thermal properties is conducted for an isotropic and homogeneous infinite strip composite reinforced by carbon nanotubes (CNTs) and containing voids. The CNTs can be uniformly or randomly ...

    • Effects of BA.1/BA.2 subvariant, vaccination, and prior infection on infectiousness of SARS-CoV-2 omicron infections. 

      Qassim, Suelen H; Chemaitelly, Hiam; Ayoub, Houssein H; AlMukdad, Sawsan; Tang, Patrick; ... more authors ( Oxford University Press , 2022 , Article)
      Compared to BA.1, BA.2 was associated with lower RT-qPCR cycle threshold (Ct) value-3.53 fewer cycles (95% CI: 3.46-3.60), signifying higher infectiousness. This may reflect higher viral load and/or longer duration of ...

    • Likelihood and Bayesian Inference in the Lomax Distribution under Progressive Censoring 

      Baklizi, A.; Saadati Nik, A.; Asgharzadeh, A. ( Horizon Research Publishing(HRPUB) , 2022 , Article)
      The Lomax distribution has been used as a statistical model in several fields, especially for business failure data and reliability engineering. Accurate parameter estimation is very important because it is the base for ...

    • Impact of COVID-19 Pandemic News on the Cryptocurrency Market and Gold Returns: A Quantile-on-Quantile Regression Analysis 

      Mahdi, Esam; Al-Abdulla, Ameena ( MDPI , 2022 , Article)
      In this paper, we investigate the relationship between the RavenPack news-based index associated with coronavirus outbreak (Panic, Sentiment, Infodemic, and Media Coverage) and returns of two commodities—Bitcoin and gold. ...

    • Chimera states in a multi-weighted neuronal network 

      Iqtadar, Hussain; Jafari, Sajad; Perc, Matjaž; Ghosh, Dibakar ( Elsevier , 2022 , Article)
      There are multiple types of interactions among neurons, each of which has a remarkable effect on the neurons' behavior. Due to the significance of chimeras in neural processes, in this paper, we study the impact of different ...

    • Differential cryptanalysis of diffusion and confusion based information confidentiality mechanism 

      Noor, Munir; Khan, Majid; Hussain, Iqtadar; Amin, Muhammad ( 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 ...

    • Image encryption scheme for multi-focus images for visual sensors network 

      Khan, Majid; Khan, Lalsaid; Hazzazi, Mohammad Mazyad; Jamal, Sajjad Shaukat; Hussain, Iqtadar ( Springer , 2022 , Article)
      Image fusion is the technique to obtain an image, possessing spatially and spectrally enhanced as compared to the individual high spatial and high spectral images. After obtaining a detailed image, propagation over an ...

    • A dual layer security scheme for medical images using Hessenberg and singular value decompositions 

      Elmoasry, Ahmed; Khan, Lal Said; Khan, Majid; Hussain, Iqtadar ( Springer , 2022 , Article)
      Due to the recent advancement in the field of the Internet of Medical things (IoMT). To facilitate doctors and patients, in the process of diagnosis and treatment, the medical imaging equipment is connected to the IoMT. ...