Results 31 to 40 of about 263,726 (280)

A Class of Diffusion Zero Attracting Stochastic Gradient Algorithms With Exponentiated Error Cost Functions

open access: yesIEEE Access, 2020
In this paper, a class of diffusion zero-attracting stochastic gradient algorithms with exponentiated error cost functions is put forward due to its good performance for sparse system identification. Distributed estimation algorithms based on the popular
Zhengyan Luo   +2 more
doaj   +1 more source

China’s global governance strategy and the revival of leftist ideologies in Africa: a constructivist analysis of norm diffusion and political alignment

open access: yesCogent Social Sciences
This empirical and theoretical study examines China’s strategic engagement in Africa through a constructivist lens, analyzing how Beijing’s approach to global governance influences the resurgence of leftist ideologies across the continent.
Jani Grey Kasunda
doaj   +1 more source

Feasibility and Safety of High‐Dose Proton Re‐Irradiation in Recurrent Pediatric Central Nervous System Tumors: A Single‐Institution Retrospective Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Purpose Pediatric central nervous system (CNS) tumors often recur despite multimodality therapy. Although re‐irradiation (re‐RT) has historically been limited by concerns for severe late toxicities, modern techniques have renewed interest in this approach. Proton therapy provides dosimetric advantages that may enable curative re‐treatment with
Jin‐Ho Song   +15 more
wiley   +1 more source

Analysis of the fractional diffusion equations with fractional derivative of non-singular kernel

open access: yesAdvances in Difference Equations, 2017
In this paper we study linear and nonlinear fractional diffusion equations with the Caputo fractional derivative of non-singular kernel that has been launched recently (Caputo and Fabrizio in Prog. Fract. Differ. Appl. 1(2):73-85, 2015).
Mohammed Al-Refai, Thabet Abdeljawad
doaj   +1 more source

A note on the design of hp-version interior penalty discontinuous Galerkin finite element methods for degenerate problems [PDF]

open access: yes, 2005
We consider a variant of the hp-version interior penalty discontinuous Galerkin finite element method (IP-DGFEM) for second order problems of degenerate type. We do not assume uniform ellipticity of the diffusion tensor.
Georgoulis, Emmanuil H., Lasis, Andris
core   +1 more source

Quasinonlocal coupling of nonlocal diffusions

open access: yes, 2017
We developed a new self-adjoint, consistent, and stable coupling strategy for nonlocal diffusion models, inspired by the quasinonlocal atomistic-to-continuum method for crystalline solids.
Li, Xingjie Helen, Lu, Jianfeng
core   +2 more sources

Assessing Cognitive Functioning in Children With Brain Tumors: Interaction of Neighborhood Social Determinants of Health and Neurological Risk

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background This study investigated how neighborhood‐level social determinants of health (SDOH), including redlining and neurological risk, interact to influence cognitive outcomes in children treated for brain tumors (CTBT). Methods A retrospective chart review of 161 CTBT aged 5–17 was conducted.
Alannah R. Srsich   +5 more
wiley   +1 more source

A Simplified Algorithm for Inverting Higher Order Diffusion Tensors

open access: yesAxioms, 2014
In Riemannian geometry, a distance function is determined by an inner product on the tangent space. In Riemann–Finsler geometry, this distance function can be determined by a norm.
Laura Astola   +4 more
doaj   +1 more source

Decay rates for a class of diffusive-dominated interaction equations

open access: yes, 2011
We analyse qualitative properties of the solutions to a mean-field equation for particles interacting through a pairwise potential while diffusing by Brownian motion.
Agapito   +36 more
core   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

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