Results 11 to 20 of about 1,211,830 (116)

On the Fredholm Alternative for the Fučík Spectrum

open access: yesAbstract and Applied Analysis, 2010
We consider resonance problems for the one-dimensional p-Laplacian assuming Dirichlet boundary conditions. In particular, we consider resonance problems associated with the first three curves of the Fučík Spectrum.
Pavel Drábek, Stephen B. Robinson
doaj   +3 more sources

On the First Curve in the FučiK Spectrum with Weights for a Mixed p-Laplacian

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2007
We show the existence of a first curve in the Fučik spectrum with weights for the p-Laplacian under mixed boundary conditions. We also study the asymptotic behavior of this first curve.
Liamidi Leadi, Aboubacar Marcos
doaj   +2 more sources

Sign-Changing Solutions for Nonlinear Elliptic Problems Depending on Parameters

open access: yesInternational Journal of Differential Equations, 2010
The study of multiple solutions for quasilinear elliptic problems under Dirichlet or nonlinear Neumann type boundary conditions has received much attention over the last decades.
Siegfried Carl, Dumitru Motreanu
doaj   +2 more sources

On Solvability of the Damped Fučík Type Problem with Integral Condition [PDF]

open access: yesMathematical Modelling and Analysis, 2014
The solvability results are established for the boundary value problem with a damping term , x(0) = 0, where x + = max{x, 0}, x - = max{-x, 0}, h is a bounded nonlinearity, µ, λ real parameters.
Natalija Sergejeva
doaj   +2 more sources

Evaluation of carbonification of coals using a portable Raman spectrometer

open access: yesJournal of Raman Spectroscopy, Volume 54, Issue 11, Page 1220-1232, November 2023., 2023
This study illustrates that it is possible to discriminate among the coals of different degrees of maturation of the carbonaceous matter and other types of carbonaceous matter using the data acquired with a portable Raman spectrometer using spectroscopic parameters: D and G band widths and wavenumber positions.
Adam Culka   +2 more
wiley   +1 more source

De novo 2′‐fucosyllactose bioproduction through modular engineering of a novel Escherichia coli K12‐derived strain

open access: yesFood Bioengineering, Volume 2, Issue 2, Page 89-104, June 2023., 2023
A novel Escherichia coli K12 derivative was used as a chassis for 2′‐FL biosynthesis. Inactivation of transcriptional regulator McbR can improve 2′‐FL production. Double mutation F40S/Q237S of FutC‐J166 increased 2′‐FL titer by 1.55‐fold. Abstract The most abundant human milk oligosaccharide 2′‐fucosyllactose (2′‐FL) is a valuable component that has ...
Chunyu Ma   +4 more
wiley   +1 more source

Multi‐level metabolic engineering of Escherichia coli for high‐titer biosynthesis of 2′‐fucosyllactose and 3‐fucosyllactose

open access: yesMicrobial Biotechnology, Volume 15, Issue 12, Page 2970-2981, December 2022., 2022
An engineered Escherichia coli was developed for high‐titer FL biosynthesis by introducing multi‐level metabolic engineering strategies. Combined with the optimization of metabolic pathways and the performance improvement of rate‐limiting enzymes, 64.62 g/L of 2 '‐FL and 40.68 g/L of 3‐FL were finally obtained in the 3‐L bioreactors.
Mengli Li   +5 more
wiley   +1 more source

Notes on the Fučík spectrum and the mixed boundary value problem [PDF]

open access: yes, 2007
summary:The paper is devoted to the study of the properties of the Fučík spectrum. In the first part, we analyse the Fučík spectra of the problems with one second order ordinary differential equation with Dirichlet, Neumann and mixed boundary conditions ...
Massa, Eugenio   +4 more
core   +1 more source

Infinitely many new curves of the Fučík spectrum [PDF]

open access: yes, 2015
In this paper we present some results on the Fučík spectrum for the Laplace operator, that give new information on its structure. In particular, these results show that, if Ω is a bounded domain of R^N with N>1, then the Fučík spectrum has infinitely ...
Molle, R   +5 more
core   +1 more source

Boundary Value Problems for a Super‐Sublinear Asymmetric Oscillator: The Exact Number of Solutions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2013, Issue 1, 2013., 2013
Properties of asymmetric oscillator described by the equation x′′=−λ(x+)p+μ(x−)q (i), where p ≥ 1 and 0 < q ≤ 1, are studied. A set of (λ, μ) such that the problem (i), x(0) = 0 = x(1) (ii), and |x′(0)| = α (iii) have a nontrivial solution, is called α‐spectrum. We give full description of α‐spectra in terms of solution sets and solution surfaces.
Armands Gritsans   +2 more
wiley   +1 more source

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