Results 11 to 20 of about 1,625 (133)

A Snakemake Toolkit for the Batch Assembly, Annotation and Phylogenetic Analysis of Mitochondrial Genomes and Ribosomal Genes From Genome Skims of Museum Collections. [PDF]

open access: yesMol Ecol Resour
ABSTRACT Low coverage ‘genome‐skims’ are often used to assemble organelle genomes and ribosomal gene sequences for cost‐effective phylogenetic and barcoding studies. Natural history collections hold invaluable biological information, yet poor preservation resulting in degraded DNA often hinders polymerase chain reaction‐based analyses.
White OW   +4 more
europepmc   +2 more sources

A review of migratory Alosidae marine ecology in the northwest Atlantic. [PDF]

open access: yesJ Fish Biol
Abstract Migratory animals play a crucial role in connecting distinct habitats by transferring matter and energy across ecosystem boundaries. In the North Atlantic, anadromous species exemplify this through their movement between freshwater and marine environments.
Brown CR   +8 more
europepmc   +2 more sources

Host Disease Tolerance Predicts Transmission Probability for a Songbird Pathogen. [PDF]

open access: yesEcol Evol
The effects of host disease tolerance on pathogen transmission are not well understood. Here, we use wild‐caught house finches to show that natural variation in tissue‐specific tolerance to a bacterial pathogen affects the transmission of this pathogen.
Henschen AE   +4 more
europepmc   +2 more sources

Changing perspectives: The development of preservice teachers' field-specific ability beliefs across academic disciplines. [PDF]

open access: yesBr J Educ Psychol
Abstract Background Field‐specific ability beliefs (FABs) reflect the perception that success in academic fields depends on innate, unteachable abilities. These beliefs affect teaching practices and student motivation. However, little is known about their longitudinal development during teacher education. Aims This study examines how FABs evolve during
Asbury K, Carstensen B, Klusmann U.
europepmc   +2 more sources

On the Nonhomogeneous Fourth-Order p-Laplacian Generalized Sturm-Liouville Nonlocal Boundary Value Problems

open access: yesDiscrete Dynamics in Nature and Society, 2012
We study the nonlinear nonhomogeneous n-point generalized Sturm-Liouville fourth-order p-Laplacian boundary value problem by using Leray-Schauder nonlinear alternative and Leggett-Williams fixed-point theorem.
Jian Liu, Zengqin Zhao
doaj   +1 more source

Existence of three positive solutions for boundary value problem with fractional order and infinite delay

open access: yesAnnals of the West University of Timisoara: Mathematics and Computer Science, 2015
In this paper we investigate the existence three positives solutions by using Leggett-Williams fixed point theorem in cones for three boundary value problem with fractional order and infinite delay.
Benaouda Hedia
doaj   +1 more source

Generalization for Amann's and Leggett–Williams' three-solution theorems and applications

open access: yesJournal of Mathematical Analysis and Applications, 2004
Let \(X\) be a nonempty closed convex subset of a real ordered Banach space \(E\) and \(A:X \to X\) a completely continuous operator. The authors give conditions for \(A\) to have at least three fixed points. The results generalize those of \textit{H. Amann} [J. Funct. Anal. 11, 346--384 (1972; Zbl 0244.47046)], \textit{R. W. Leggett} and \textit{L. R.
Li, Fuyi, Han, Guodong
openaire   +2 more sources

Multiple Positive Solutions for Nonlinear First-Order Impulsive Dynamic Equations on Time Scales with Parameter

open access: yesAdvances in Difference Equations, 2009
By using the Leggett-Williams fixed point theorem, the existence of three positive solutions to a class of nonlinear first-order periodic boundary value problems of impulsive dynamic equations on time scales with parameter are obtained.
Da-Bin Wang, Wen Guan
doaj   +2 more sources

Triple solutions for a nonlocal functional boundary value problem by Leggett-Williams theorem

open access: yesApplicable Analysis, 2004
Applicable ...
Karakostas, G. L.   +2 more
openaire   +3 more sources

Positive Solutions for Boundary Value Problems of Second-Order Functional Dynamic Equations on Time Scales

open access: yesAdvances in Difference Equations, 2009
Criteria are established for existence of least one or three positive solutions for boundary value problems of second-order functional dynamic equations on time scales.
Karaca IlkayYaslan
doaj   +2 more sources

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