Mathematics, Statistics & Physics: Recent submissions
Now showing items 201-220 of 814
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Weighted estimates for oscillatory singular integrals
(2013 , Article)We establish uniform bounds for oscillatory singular integrals as well as oscillatory singular integral operators. We allow the singular kernel to be given by a function in the Hardy space H1(Sn-1), while such results were ... -
Rough oscillatory singular integrals on ℝⁿ
( Instytut Matematyczny , 2014 , Article)We establish sharp bounds for oscillatory singular integrals with an arbitrary real polynomial phase P. The kernels are allowed to be rough both on the unit sphere and in the radial direction. We show that the bounds grow ... -
On the boundedness of a class of rough maximal operators on product spaces
(2011 , Article)In this paper, we study the Lp boundedness of a class of maximal operators T (γ) {Ωj} and a related class of rough singular integrals on product spaces. We obtain appropriate Lp estimates for such maximal operators and ... -
Boundedness of rough integral operators on triebel-lizorkin spaces
( Universitat Autonoma de Barcelona, Seccio de Matematiques , 2012 , Article)We prove the boundedness of several classes of rough integral operators on Triebel-Lizorkin spaces. Our results represent improvements as well as natural extensions of many previously known results. -
On the boundedness of rough oscillatory singular integrals on Triebel-Lizorkin spaces
( springer link , 2011 , Article)We obtain appropriate sharp bounds on Triebel-Lizorkin spaces for rough oscillatory integrals with polynomial phase. By using these bounds and using an extrapolation argument we obtain some new and previously known results ... -
On certain estimates of rough oscillatory singular integrals
(2011 , Article)We obtain appropriate sharp estimates for rough oscillatory integrals with polynomial phase. Our results represent significant improvements as well as natural extensions of what was known previously. -
Electrospun Polysulfone Hybrid Nanocomposite Fibers as Membrane for Separating Oil/Water Emulsion
( Springer Nature , 2023 , Article)Commercial polymer membranes are largely utilized to separate oil/water mixtures; however, membrane fouling, flux decline, and short lifetime often inhibit their high performance. In order to resolve these drawbacks of the ... -
An efficient image encryption scheme based on double affine substitution box and chaotic system
( Elsevier , 2021 , Article)Privacy of information is one of the most important and unavoidable issues in our digitally advance era. A huge amount of information transmitted over different servers and networking protocols. The sphere of digitally ... -
A new approach to predicting cryptocurrency returns based on the gold prices with support vector machines during the COVID-19 pandemic using sensor-related data
( MDPI , 2021 , Article)In a real-world situation produced under COVID-19 scenarios, predicting cryptocurrency returns accurately can be challenging. Such a prediction may be helpful to the daily economic and financial market. Unlike forecasting ... -
An efficient image encryption scheme based on fractal Tromino and Chebyshev polynomial
( Springer International Publishing , 2021 , Article)The security of digital content during transmission and storage through insecure communication links and databases is a challenging issue in today's world. In this article, an encryption scheme based on fractal Tromino and ... -
A New System with a Self-Excited Fully-Quadratic Strange Attractor and Its Twin Strange Repeller
( World Scientific , 2021 , Article)In nonlinear dynamics, the study of chaotic systems has attracted the attention of many researchers around the world due to the exciting and peculiar properties of such systems. In this regard, the present paper introduces ... -
A Chaotic Quadratic Bistable Hyperjerk System with Hidden Attractors and a Wide Range of Sample Entropy: Impulsive Stabilization
( World Scientific , 2021 , Article)Hidden attractors generated by the interactions of dynamical variables may have no equilibrium point in their basin of attraction. They have grabbed the attention of mathematicians who investigate strange attractors. ... -
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 ... -
Measuring skewness: We do not assume much
( Sharif University of Technology , 2021 , Article)Since skewness plays a vital role in different engineering phenomena, its accurate measurement gains significance. Several measures have been taken to quantify the extent of skewness in distributions over the years, but ... -
Optimization of tank engine crank shaft material properties
( Taylor and Francis Ltd. , 2023 , Article)Metals and coating materials, with best material properties are highly desired in the field of engineering to control the stresses and strains, that play important role in design strategies. The crankshaft, an important ... -
On the Investigation of Monthly River Flow Generation Complexity Using the Applicability of Machine Learning Models
( Hindawi Limited , 2021 , Article)Streamflow is associated with several sources on nonstationaries and hence developing machine learning (ML) models is always the motive to provide a reliable methodology to understand the actual mechanism of streamflow. ... -
Causes of Undergraduate Students' Underachievement in a Gulf Cooperation Council Country (GCC) University
( SAGE Publications Inc. , 2022 , Article)UNESCO reports enrollment in higher education in the Arab and Gulf Cooperation Council region doubled from 5.1 million in 2000 to 10.7 million in 2015. Despite significant budgets and the world's lowest teacher-to-student ... -
Estimation of health-related quality of life in the presence of missing Values in EQ-5D
( Hindawi Limited , 2021 , Article)One of the notes worthy problems in analysis of clinical and observational studies is missing data and nonresponse from patients. Turning a blind eye to the missing behavior may provide biased results with overestimated ... -
Dynamical analysis of the delayed immune response to cancer
( Elsevier , 2021 , Article)In the antitumor response, cytotoxic CD8 + T cells and the functional organization of CD4 + T cells play an important role. During this research, a mathematical model is built. In this model, the ability of CD4 + T cells, ... -
An analytical study of employee happiness in service sectors: A pilot study
( Natural Sciences Publishing , 2021 , Article)The present paper aims to investigate happiness levels of employees in services and underpin disparate evidences from existing literature, to any reported differences in the levels of happiness among employees. This paper ...
