Mathematics, Statistics & Physics: Recent submissions
Now showing items 121-140 of 738
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On rough maximal operators and Marcinkiewicz integrals along submanifolds
(2009 , Article)We investigate the LP boundedness for a class of parametric Marcinkiewicz integral operators associated to submanifolds and a class of related maximal operators under the L(log L)α(Sn-1) condition on the kernel functions. ... -
On certain estimates for marcinkiewicz integrals and extrapolation
( Universidad de Barcelona , 2009 , Article)We obtain Lp estimates for parametric Marcinkiewicz integrals associated to polynomial mappings and with rough kernels on the unit sphere as well as on the radial direction. These estimates will allow us to use an extrapolation ... -
On certain rough integral operators and extrapolation
( Victoria university , 2009 , Article)In this paper, we obtain sharp Lp estimates of two classes of maximal operators related to rough singular integrals and Marcinkiewicz integrals. These estimates will be used to obtain similar estimates for the related ... -
Certain estimates of oscillatory integrals and extrapolation
(2010 , Article)In this paper we study the boundedness properties of certain oscillatory integrals with polynomial phase. We obtain sharp estimates for these oscillatory integrals. By the virtue of these estimates and extrapolation we ... -
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. -
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 ... -
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. -
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 ... -
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 ... -
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 ... -
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. ... -
Association of Serum Vitamin D level and COVID-19 infection: A Case-control Study
( HBKU Press , 2022 , Article)Background: Vitamin D is considered a potent modulator of the immune system, albeit its role in COVID-19 infection is a matter of debate. The present study aimed to estimate the association between serum vitamin D levels ... -
The Reliability, Validity and Normative Scores of the Bene-Anthony Family Relations Test for Use With Arab Children
( Frontiers Media S.A. , 2021 , Article)Background: The Bene-Anthony Family Relations Test (BAFRT) is one of the most widely used measures of family dynamics seen from a child's perspective. However, the most common issue surrounding this test is the lack of ...
