Results 71 to 80 of about 61,849 (347)

Effects of chronic browsing on life‐history traits of an irruptive large herbivore population

open access: yesPopulation Ecology, EarlyView.
This study aimed to determine the relationship between diet quality, body mass, and size (hind foot length), and female reproduction and sought to identify the mechanism by which high density under severe food limitations is maintained. Our results demonstrated that sika deer introduced to Nakanoshima Island have maintained high densities through high ...
Koichi Kaji   +9 more
wiley   +1 more source

New Properties and Matrix Representations on Higher-Order Generalized Fibonacci Quaternions with q-Integer Components

open access: yesAxioms
In this paper, by using q-integers and higher-order generalized Fibonacci numbers, we define the higher-order generalized Fibonacci quaternions with q-integer components. We give some special cases of these newly established quaternions.
Can Kızılateş   +3 more
doaj   +1 more source

The Regularity of Functions on Dual Split Quaternions in Clifford Analysis

open access: yesAbstract and Applied Analysis, 2014
This paper shows some properties of dual split quaternion numbers and expressions of power series in dual split quaternions and provides differential operators in dual split quaternions and a dual split regular function on Ω⊂ℂ2×ℂ2 that has a dual split ...
Ji Eun Kim, Kwang Ho Shon
doaj   +1 more source

Combining transient dynamics and logistic‐asymptotic growth to study the recovery of two seabird populations after rat eradication

open access: yesPopulation Ecology, EarlyView.
This study examines the demographic dynamics of two seabird populations on Tromelin Island, 15 years after the eradication of brown rats. The results indicate that these populations are in good health and are expected to continue growing until breeding sites are saturated in about a century.
Merlène Saunier   +6 more
wiley   +1 more source

Zeroing neural networks for computing quaternion linear matrix equation with application to color restoration of images

open access: yesAIMS Mathematics, 2023
The importance of quaternions in a variety of fields, such as physics, engineering and computer science, renders the effective solution of the time-varying quaternion matrix linear equation (TV-QLME) an equally important and interesting task.
Vladislav N. Kovalnogov   +7 more
doaj   +1 more source

Commutative Quaternion Matrices

open access: yes, 2013
In this study, we introduce the concept of commutative quaternions and commutative quaternion matrices. Firstly, we give some properties of commutative quaternions and their Hamilton matrices.
Kösal, Hidayet Hüda, Tosun, Murat
core   +1 more source

A Note on Jacobsthal Quaternions

open access: yes, 2016
In this paper we introduce the Jacobsthal quaternions and the Jacobsthal–Lucas quaternions and give some of their properties. We derive the relations between Jacobsthal quaternions and Jacobsthal–Lucas quaternions and we give the matrix representation of
A. Szynal-Liana, I. Włoch
semanticscholar   +1 more source

“Balbin's Quaternions” [PDF]

open access: yesNature, 1888
NATURE of December 15, 1887 (p. 145), which has lately reached me, contains a notice of a treatise on Quaternions, by Prof. Valentin Balbin, in which the reviewer alludes to the “slight alterations” introduced into the notation of quaternions by Messrs. Houel and Laisant, and apparently visits them all with equal condemnation.
openaire   +3 more sources

Quaternion group algebra and representations of the quaternions [PDF]

open access: yesCommunications in Algebra, 2019
AbstractIn this paper, we provide a concrete and explicit decomposition of the quaternion group algebra through a suitable basis of the algebra.
openaire   +2 more sources

Quaternionic electrodynamics [PDF]

open access: yesModern Physics Letters A, 2020
We develop a quaternionic electrodynamics and show that it naturally supports the existence of magnetic monopoles. We obtained the field equations, the continuity equation, the electrodynamic force law, the Poynting vector, the energy conservation, and the stress-energy tensor.
openaire   +3 more sources

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