Results 41 to 50 of about 524,417 (274)
Existence of Positive Periodic Solutions for n-Dimensional Nonautonomous System
Discrete Dynamics in Nature and Society, 2014 In this paper we consider the existence, multiplicity, and nonexistence of positive periodic solutions for n-dimensional nonautonomous functional differential system x'(t)=H(t,x(t))-λB(t)F(x(t-τ(t))), where hi are ω-periodic in t and there exist ω ...
Youjun Liu, Huanhuan Zhao, Jurang Yan
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The Newtonian limit of the relativistic Boltzmann equation
, 2004 The relativistic Boltzmann equation for a constant differential cross section and with periodic boundary conditions is considered. The speed of light appears as a parameter $c>c_0$ for a properly large and positive $c_0$. A local existence and uniqueness
Glassey R. T. +4 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Neuropsychological complications may impair the qualitative prognosis of patients with pediatric brain tumors. However, multifaceted evaluations cannot be conducted in all patients because they are time consuming and burdensome for patients.
Ami Tabata +9 more
wiley +1 more source
Existence of positive periodic solutions of an SEIR model with periodic coefficients [PDF]
Applications of Mathematics, 2012 The paper deals with the SEIR epidemic model \[ S'=\Lambda (t)-\beta (t)S\,I-\mu (t)S, \] \[ E'=\beta (t)S\,I-(\mu (t)+\varepsilon (t))\,E, \] \[ I'=\varepsilon (t)E-(\mu (t)+\alpha (t)+\gamma (t))\,I, \] \[ R'=\gamma (t)I-\mu (t)R, \] where \(\Lambda ,\alpha ,\beta ,\gamma ,\varepsilon ,\mu \) are positive \(T\)-periodic continuous functions.
Zhang, Tailei, Liu, Junli, Teng, Zhidong
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Alveolar soft part sarcoma (ASPS) is a rare soft tissue sarcoma occurring most commonly in adolescence and young adulthood. Methods We present the clinical characteristics, treatments, and outcomes of patients with newly diagnosed ASPS enrolled on the Children's Oncology Group study ARST0332.
Jacquelyn N. Crane +11 more
wiley +1 more source
Positive periodic solutions of functional discrete systems and population models
Advances in Difference Equations, 2005 We apply a cone-theoretic fixed point theorem to study the existence of positive periodic solutions of the nonlinear system of functional difference equations x(n+1)=A(n)x(n)+f(n,xn).
Christopher C. Tisdell +1 more
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Fractional Schrodinger-Poisson equations with general nonlinearities
Electronic Journal of Differential Equations, 2016 In this article we study the existence of positive solutions and ground state solutions for a class of fractional Schrodinger-Poisson equations in R^3 with general nonlinearity.
Ronaldo C. Duarte, Marco A. S. Souto
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Symmetry breaking in the periodic Thomas--Fermi--Dirac--von Weizs{\"a}cker model
, 2017 We consider the Thomas--Fermi--Dirac--von~Weizs{\"a}cker model for a system composed of infinitely many nuclei placed on a periodic lattice and electrons with a periodic density. We prove that if the Dirac constant is small enough, the electrons have the
Ricaud, Julien
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Implementing Health‐Related Quality of Life Assessment in Pediatric Oncology: A Feasibility Study
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background There is growing interest in embedding health‐related quality of life (HRQoL) assessment and patient‐reported outcome measures (PROMs) within clinical cancer care. This study evaluated the feasibility, acceptability, and usability of implementing an electronic PROM (ePROM) platform to measure HRQoL in children with cancer ...
Mikaela Doig +13 more
wiley +1 more source
Existence of positive periodic solutions for non-autonomous functional differential equations
Electronic Journal of Differential Equations, 2001 We establish the existence of positive periodic solutions for a first-order differential equation with periodic delay. For this purpose, we use the fixed point theorem proved by Krasnoselskii.
Sui Sun Cheng, Guang Zhang
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