Zobrazeno 1 - 10
of 116
pro vyhledávání: '"Robert Klement"'
Autor:
Daniel Drdlik, Vojtech Marak, Robert Klement, Pavel Tofel, Katarina Drdlikova, Hynek Hadraba, Zdenek Chlup
Publikováno v:
Boletín de la Sociedad Española de Cerámica y Vidrio, Vol 63, Iss 5, Pp 368-376 (2024)
In progressive particle or layered composites based on a combination of BaTiO3 and Al2O3, serving as e.g. ceramic harvesters, new phases are formed during heat treatment. The dominant one is BaTiAl6O12. This study provides information about the micro
Externí odkaz:
https://doaj.org/article/86caf723d2ea42718684b52dcc807795
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-9 (2023)
Abstract The optical characteristics of Dy3+-doped phosphate and borophosphate glasses with different divalent network modifiers prepared by melt-quenching are studied. The glass sets (A) with a molar composition of 40MO–60P2O5 and (B) with a molar
Externí odkaz:
https://doaj.org/article/3a651df298c543fc87cd9a6ef5ffafa7
Autor:
Guillermo Torres, Gail H. Schaefer, Robert P. Stefanik, David W. Latham, Andrew F. Boden, Narsireddy Anugu, Jeremy W. Jones, Robert Klement, Stefan Kraus, Cyprien Lanthermann, John D. Monnier
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 31 (2024)
We report long-baseline interferometric observations with the CHARA Array that resolve six previously known double-lined spectroscopic binary systems in the Hyades cluster, with orbital periods ranging from 3 to 358 days: HD 27483, HD 283882, HD 2687
Externí odkaz:
https://doaj.org/article/1cc85ce0070443c4b45d108eeb5363ff
Autor:
Robert Klement, Thomas Rivinius, Douglas R. Gies, Dietrich Baade, Antoine Mérand, John D. Monnier, Gail H. Schaefer, Cyprien Lanthermann, Narsireddy Anugu, Stefan Kraus, Tyler Gardner
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 70 (2024)
Rapid rotation and nonradial pulsations enable Be stars to build decretion disks, where the characteristic line emission forms. A major but unconstrained fraction of Be stars owe their rapid rotation to mass and angular momentum transfer in a binary.
Externí odkaz:
https://doaj.org/article/0da8682752b84672a5e5dfabde9c183b
Publikováno v:
The Astrophysical Journal Letters, Vol 942, Iss 1, p L6 (2022)
The origin of the bright and hard X-ray emission flux among the γ Cas subgroup of B-emission line (Be) stars may be caused by gas accretion onto an orbiting white dwarf (WD) companion. Such Be+WD binaries are the predicted outcome of a second stage
Externí odkaz:
https://doaj.org/article/e7ddcac8590246d992474eeffe73702e
Autor:
Rex Lam, Eric L. Sandquist, Gail H. Schaefer, Christopher D. Farrington, John D. Monnier, Narsireddy Anugu, Cyprien Lanthermann, Robert Klement, Jacob Ennis, Benjamin R. Setterholm, Tyler Gardner, Stefan Kraus, Claire L. Davies, Jerome A. Orosz
Publikováno v:
The Astronomical Journal, Vol 166, Iss 1, p 29 (2023)
We present measurements of the interferometrically resolved binary star system 12 Com and the single giant star 31 Com in the cluster Coma Berenices. 12 Com is a double-lined spectroscopic binary system consisting of a G7 giant and an A3 dwarf at the
Externí odkaz:
https://doaj.org/article/ba7343c603ab47fca87b391537e1afbb
Autor:
Narsireddy Anugu, Jacques Kluska, Tyler Gardner, John D. Monnier, Hans Van Winckel, Gail H. Schaefer, Stefan Kraus, Jean-Baptiste Le Bouquin, Steve Ertel, Antoine Mérand, Robert Klement, Claire L Davies, Jacob Ennis, Aaron Labdon, Cyprien Lanthermann, Benjamin R. Setterholm, Theo ten Brummelaar, Akke Corporaal, Laurence Sabin, Jayadev Rajagopal
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 2, p 149 (2023)
Some evolved binaries, namely post–asymptotic giant branch (AGB) binaries, are surrounded by stable and massive circumbinary disks similar to protoplanetary disks found around young stars. Around 10% of these disks are transition disks: they have a
Externí odkaz:
https://doaj.org/article/c827fade92334d3e90442fa72630c44f
Publikováno v:
Molecules, Vol 26, Iss 22, p 6901 (2021)
Transparent oxyfluoride glass-ceramics (GCs) with embedded β-Na1.5Y1.5F6 crystals doped with Er3+ ions were fabricated by a melt-quenching method with subsequent heat-treatment. The structural characterizations and spectroscopic techniques were perf
Externí odkaz:
https://doaj.org/article/c1273b26ce4d4e95a557b1b9554353d7
Autor:
Anna, Prnová, Jana, Valúchová, Milan, Parchovianský, Peter, Švančárek, František, Šimko, Aydar, Rakhmatullin, Helena, Pálková, Hruška, Branislav, Róbert, Klement, Dušan, Galusek
Publikováno v:
In Journal of Materials Research and Technology September-October 2023 26:2333-2351
Autor:
Marzieh Ghadamyari, Róbert Klement, Hossein Ebrahim Hosseini, Milan Parchovianský, Jozef Kraxner, Dušan Galusek, Sathya Narayanasamy, Erwin Hack, Gurdial Blugan, Monika Michálková
Publikováno v:
Open Ceramics, Vol 19, Iss , Pp 100654- (2024)
Achieving full-spectrum lighting is a major challenge for phosphor-converted light-emitting diodes (pc-LEDs), which are crucial for solid-state lighting. This study presents the synthesis of polycrystalline Eu-doped Y3Al5O12 (YAG) phosphors through a
Externí odkaz:
https://doaj.org/article/7ec10aa6d99947a1a75759c856a3c1d3