Results 51 to 60 of about 16,387 (222)

Thermodynamical aspects of running vacuum models [PDF]

open access: yes, 2016
The thermal history of a large class of running vacuum models in which the effective cosmological term is described by a truncated power series of the Hubble rate, whose dominant term is $\Lambda (H) \propto H^{n+2}$, is discussed in detail. Specifically,
Basilakos, Spyros   +2 more
core   +2 more sources

Nádobkové kachle ze 14. století z hradu Kost v severovýchodních Čechách : příspěvek k počátkům užívání kachlů na šlechtických sídlech

open access: yesArchaeologia Historica, 2022
Studie se věnuje souboru kamnářské keramiky, který byl objeven při záchranném výzkumu na hradě Kost (Čechy). Kolekce je tvořena zlomky baňkovitých kachlů s prodlouženým hrdlem, které se vyznačují aplikací zelené glazury a specifickou keramickou hmotou ...
Pavel Drnovský, Jiří Unger
doaj   +1 more source

Field Cooled Annular Josephson Tunnel Junctions

open access: yes, 2020
We investigate the physics of planar annular Josephson tunnel junctions quenched through their transition temperature in the presence of an external magnetic field.
Koshelets, Valery P.   +2 more
core   +1 more source

Gamma-ray bursters as sources of cosmic rays [PDF]

open access: yes, 1995
The little we do know of the physical conditions in gamma-ray bursters makes them conducive to the acceleration of high-energy cosmic rays, especially if they are at cosmological distances.
Milgrom, Mordehai, Usov, Vladimir
core   +3 more sources

Benefits of the long-term research into the Pustý hrad castle (Deserted castle) in Zvolen and its prospects for the future

open access: yesArchaeologia historica, 2020
The National Cultural Monument of the Pustý hrad castle in Zvolen towers majestically on a hill at the south edge of the town of Zvolen, in the heart of Slovakia. The interest in research into this site goes back to the 18th century.
Noémi Beljak-Pažinová, J. Beljak
semanticscholar   +1 more source

Turning Around the Sphaleron Bound: Electroweak Baryogenesis in an Alternative Post-inflationary Cosmology [PDF]

open access: yes, 1997
The usual sphaleron bound and the statement of the impossibility of baryon production at a second order phase transition or analytic cross-over are reformulated in the first part of the paper as requirements of the expansion rate of the Universe at the ...
A. B. Burd   +76 more
core   +4 more sources

Elliptical Ring Antenna Excited by Circular Disc Monopole for UWB Communications

open access: yesInternational Journal of Antennas and Propagation, 2020
This research proposes a compact elliptical ring antenna excited by a circular disc monopole (CDM) for ultra-wideband (UWB) communications. In the study, time- and frequency-domain pulse distortions of the antenna in the transmission mode were ...
Krittaya Nakprasit   +2 more
doaj   +1 more source

Comment on "Kinetic decoupling of WIMPs: Analytic expressions" [PDF]

open access: yes, 2017
Visinelli and Gondolo (2015, hereafter VG15) derived analytic expressions for the evolution of the dark matter temperature in a generic cosmological model. They then calculated the dark matter kinetic decoupling temperature $T_{\mathrm{kd}}$ and compared
Erickcek, Adrienne L.   +1 more
core   +3 more sources

Modelling of Data Communication over Medium-Voltage Power Distribution Lines

open access: yesCommunications, 2016
The paper is dedicated to different topologies of medium-voltage power distribution lines with respect to their properties influencing the transmission of communication signals.
Jaromir Hrad, Jiri Vodrazka
doaj   +1 more source

Quintessential Affleck-Dine baryogenesis with non-minimal couplings

open access: yes, 2018
We present a novel Affleck-Dine scenario for the generation of the observed baryon asymmetry of the Universe based on the non-trivial interplay between quintessential inflationary models containing a kinetic dominated post-inflationary era and a non ...
Bettoni, Dario, Rubio, Javier
core   +1 more source

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