Results 11 to 20 of about 358,667 (342)

The Multiple Paths to Multiple Life [PDF]

open access: yesJournal of Molecular Evolution, 2021
AbstractWe argue for multiple forms of life realized through multiple different historical pathways. From this perspective, there have been multiple origins of life on Earth—life is not a universal homology. By broadening the class of originations, we significantly expand the data set for searching for life.
Christopher P. Kempes, David C. Krakauer
openaire   +3 more sources

Conceptual unity of existence in Islamic philosophy: A critical review [PDF]

open access: yesKom: Časopis za Religijske Nauke, 2022
In ontology, a fundamental philosophical discipline, the term "existence" has a central role. Taking into account frequent misunderstandings and lack of discernment between a concept and its objective example in philosophical discussions on various ...
Razić Refik
doaj   +1 more source

Existence and exact multiplicity of positive periodic solutions to forced non-autonomous Duffing type differential equations

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
The paper studies the existence, exact multiplicity, and a structure of the set of positive solutions to the periodic problem $$ u''=p(t)u+q(t,u)u+f(t);\quad u(0)=u(\omega),\ u'(0)=u'(\omega), $$ where $p,f\in L([0,\omega])$ and $q\colon[0,\omega ...
Jiří Šremr
doaj   +1 more source

Multiplicity among solar-type stars [PDF]

open access: yesAstronomy & Astrophysics, 2018
Context. The statistical properties of binary stars are clues for understanding their formation process. A radial velocity survey was carried on amongst nearby G-type stars and the results were published in 1991. Aims.
J. Halbwachs   +3 more
semanticscholar   +1 more source

Periodic Solutions of Some Classes of One Dimensional Non-autonomous Equation

open access: yesFrontiers in Physics, 2020
In this paper, the periodic solutions of a certain one-dimensional differential equation are investigated for the first order cubic non-autonomous equation. The method used here is the bifurcation of periodic solutions from a fine focus z = 0.
Saima Akram   +8 more
doaj   +1 more source

A SURVEY OF STELLAR FAMILIES: MULTIPLICITY OF SOLAR-TYPE STARS [PDF]

open access: yes, 2009
We present the results of a comprehensive assessment of companions to solar-type stars. A sample of 454 stars, including the Sun, was selected from the Hipparcos catalog with π>40 mas, σπ/π < 0.05, 0.5 ⩽ B − V ⩽ 1.0 (∼F6–K3), and constrained by absolute ...
D. Raghavan   +8 more
semanticscholar   +1 more source

Representative and highly sensitive express method of measurement of f-activity [PDF]

open access: yesЯдерна фізика та енергетика, 2022
The method for determination of f-activity (spontaneous fission) of samples based on a combination of multiplicity spectrometry, measurement of radiation energy, and registration of time of long-range fission products is considered.
Yu. G. Shchepkin   +3 more
doaj   +1 more source

On the Multiplicity One Conjecture in min-max theory [PDF]

open access: yesAnnals of Mathematics, 2019
We prove that in a closed manifold of dimension between 3 and 7 with a bumpy metric, the min-max minimal hypersurfaces associated with the volume spectrum introduced by Gromov, Guth, Marques-Neves, are two-sided and have multiplicity one. This confirms a
Xin Zhou
semanticscholar   +1 more source

Standing waves to upper critical Choquard equation with a local perturbation: Multiplicity, qualitative properties and stability

open access: yesAdvances in Nonlinear Analysis, 2022
In this article, we consider the upper critical Choquard equation with a local perturbation −Δu=λu+(Iα∗∣u∣p)∣u∣p−2u+μ∣u∣q−2u,x∈RN,u∈H1(RN),∫RN∣u∣2=a,\left\{\begin{array}{l}-\Delta u=\lambda u+\left({I}_{\alpha }\ast | u\hspace{-0.25em}{| }^{p})| u\hspace{
Li Xinfu
doaj   +1 more source

The images of time in the epoch of multiculturalism

open access: yesCreativity Studies, 2008
The article is devoted to the comprehension of the connection between the idea and practice of multiculturalism and images of time that define the identity of classical cultural models.
Ina Nalivaika
doaj   +1 more source

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