Results 51 to 60 of about 1,794,477 (278)

Exact solution for a fermion in the background of a scalar inversely linear potential

, 2004
The problem of a fermion subject to a general scalar potential in a two-dimensional world is mapped into a Sturm-Liouville problem for nonzero eigenenergies. The searching for possible bounded solutions is done in the circumstance of power-law potentials.
't Hooft, Abramowitz, Antonio S. de Castro, Bagrov, Bhalerao, Capri, Cavalcanti, Coleman, Coleman, Cooper, Coutinho, Coutinho, de Castro, de Castro, Flügge, Fröhlich, Galić, Hiller, Ho, Kogut, Kratzer, Landau, Moss, Nogami, Nogami, Spector, Strange, Thaller   +27 more
core   +1 more source

Lower and Upper Solutions for Singular Derivative Dependent Dirichlet Problem [PDF]

Mathematical Inequalities & Applications, 2001
The author develops the lower and upper solution method to work out the Dirichlet problem \[ u''+f(t,u,u')=0,\quad u(a)=0,\;u(b)=0, \] where \(f\) can be singular for \(t=a\), \(t=b\) and \(u=0\). Solutions are supposed to be in \(W^{1,1}(a,b)\cap W^{2,1}_{loc}(a,b)\).
openaire   +1 more source

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

FEBS 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

A method of upper and lower solutions for functional differential inclusions [PDF]

International Journal of Stochastic Analysis, 2002
In this paper, a fixed point theorem for condensing maps combined with upper and lower solutions are used to investigate the existence of solutions for first order functional differential inclusions.
Benchohra, Mouffak, Ntouyas, Sotiris K.
openaire   +2 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Existence of traveling wavefronts for integrodifference equations with bilateral exponential kernel

Electronic Journal of Differential Equations, 2016
In this article, we study the existence of traveling wavefronts for integrodifference equation with a bilateral exponential kernel, namely, the Laplacian kernel.
Huaqin Peng, Zhiming Guo, Zizi Wang
doaj  

Weighted k-Server Bounds via Combinatorial Dichotomies

, 2017
The weighted $k$-server problem is a natural generalization of the $k$-server problem where each server has a different weight. We consider the problem on uniform metrics, which corresponds to a natural generalization of paging.
Bansal, Nikhil, Elias, Marek, Koumoutsos, Grigorios   +2 more
core   +2 more sources

Upper–lower solutions for nonlinear parabolic systems and their applications

Journal of Mathematical Analysis and Applications, 2011
A method of upper and lower-solutions for nonlinear time-dependent reaction-diffusion systems of the type \[ \begin{cases} {\partial \over {\partial t}} u_i(x,t) - d_i \Delta u_i(x,t)= f_i(u_1,\dots,u_m, x) \quad \text{ for } x\in \Omega \subset \mathbb R^m \\ \alpha_i u_i(x,t) + \beta_i {\partial \over \partial n} u_i(x,t) = \psi_i(u_1,\dots,u_{i-1 ...
Abudiab, Mufid, Ahn, Inkyung, Li, Lige
openaire   +2 more sources

Transferrin receptor 1‐mediated iron uptake supports thermogenic activation in human cervical‐derived adipocytes

FEBS Letters, EarlyView.
In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai, Mizuki Seo, Gyath Karadsheh, Fachrur Rizal Mahendra, Máté Á Demény, Ferenc Győry, János András Mótyán, László Fésüs, Endre Kristóf, Rini Arianti   +9 more
wiley   +1 more source

Minimal wave speeds of delayed dispersal predator-prey systems with stage structure

Electronic Journal of Differential Equations, 2016
This article concerns the minimal wave speed of delayed predator-prey systems with nonlocal dispersal and stage structure. By the method of upper and lower solutions, we prove the existence of positive traveling wave solutions.
Shuxia Pan
doaj