Results 41 to 50 of about 12,496 (186)

The Use of Online Education by the Czech Population in the European Context

International Journal of Research in E-Learning, 2021
The article deals with online educational courses in the Czech Republic. The subject of the investigation is the participation of individuals between 16–74 years of age in online education in the Czech Republic and its development.
Hanne-Lore Bobáková, Martina Chylková
doaj   +1 more source

Comments on "Casimir Effect in the Kerr spacetime with Quintessence"

, 2017
This comment is devoted to the recalculation of the Casimir energy of a massless scalar field in the Kerr black hole surrounded by quintessence derived in [B. Toshmatov, Z. Stuchl\'{i}k and B. Ahmedov, Eur. Phys. J.
Ahmedov, Bobomurat, Stuchlík, Zdeněk, Toshmatov, Bobir   +2 more
core   +1 more source

‘Why Did You Go to Buda?’: The Humanist Sodality and Mantuan’s Rustic Idyll in Bohuslaus of Hassenstein’s Ecloga sive Idyllion Budae (1503)☆

Renaissance Studies, EarlyView.
Abstract In the late fifteenth century, the Hungarian royal court at Buda was home to a cosmopolitan community of humanists. In early modern historiography, this cultural milieu has often been interpreted as one of the new, emergent ‘centres’ of the Renaissance in East Central Europe.
Eva Plesnik
wiley   +1 more source

Sensitivity of winter rapeseed (Brassica napus L.) to isolates of the fungus Leptosphaeria maculans (Desm.) Ces. et de Not

Plant Protection Science, 2002
The pure cultures of the fungus Leptosphaeria maculans were isolated from the rapeseed leaves collected in Moravia. Two isolates were collected on the basis of their ability to produce yellow colour.
E. Plachká, L. Odstrčilová
doaj   +1 more source

Construction of minimal non-invertible skew-product maps on 2-manifolds

, 2014
Applying the Hric-J\"ager blow up technique, we give an affirmative answer to the question about the existence of non-invertible minimal circle-fibered self-maps of the Klein bottle.
Trofimchuk, Sergei, Šotola, Jakub
core   +1 more source

On nonlocal symmetries for the Krichever--Novikov equation [PDF]

, 2012
We construct new infinite hierarchies of nonlocal symmetries and cosymmetries for the Krichever--Novikov equation using the inverse of the fourth-order recursion operator of the latter.Comment: 11 pages, no ...
Adler, Bocharov, Błaszak, Demskoi, Grinevich, Guthrie, Hernández Heredero, Igonin, Krichever, Maltsev, Marvan, Marvan, Marvan, Marvan, Mikhailov, Novikov, Oevel, Petr Vojčák, Reyes, Reyes, Sergyeyev, Sergyeyev, Sergyeyev, Sokolov   +23 more
core   +1 more source

Pre‐industrial Use of Bauxite by Late Gothic Goldsmith Masters: Analytical Evidence and Experimental Study

ChemPlusChem, Volume 90, Issue 6, June 2025.
First analytical evidence and replication of yet undescribed substantial change in gilding technology in the early modern period ‐ the replacement of imported red clay (bole) with locally available bauxite. Proof of its source ‐ Croatian Minjera, according to a unique find of mineral diaspore.
David Hradil, Janka Hradilová, Petr Bezdička, Ivan Razum   +3 more
wiley   +1 more source

ON OBSERVATIONAL PHENOMENA RELATED TO KERR SUPERSPINARS

Acta Polytechnica, 2014
We investigate possible signatures of a Kerr naked singularity (superspinar) in various observational phenomena. It has been shown that Kerr naked singularities (superspinars) have to be efficiently converted to a black hole due to accretion from ...
Zdenek Stuchlik, Jan Schee
doaj   +1 more source

Unconstrained Lagrangian Variational Principles for the Einstein Field Equations

Entropy, 2023
This paper deals with the problem of establishing a systematic theoretical formulation of variational principles for the continuum gravitational field dynamics of classical General Relativity (GR).
Claudio Cremaschini, Massimo Tessarotto
doaj   +1 more source

Disc-oscillation resonance and neutron star QPOs: 3:2 epicyclic orbital model

, 2010
The high-frequency quasi-periodic oscillations (HF QPOs) that appear in the X-ray fluxes of low-mass X-ray binaries remain an unexplained phenomenon. Among other ideas, it has been suggested that a non-linear resonance between two oscillation modes in an
Abramowicz, Abramowicz, Abramowicz, Abramowicz, Abramowicz, Abramowicz, Abramowicz, Akmal, Aliev, Baldo, Barret, Barret, Barret, Belloni, Belloni, Berti, Bhattacharyya, Blaes, Blaes, Blaes, Boutelier, Bursa, Bursa, Chandrasekhar, Chodos, De Villiers, E. Šrámková, G. Török, Glendenning, Hartle, Hawley, Horák, Horák, Horák, Horák, Horák, Kluźniak, Kluźniak, Kluźniak, Kluźniak, Kluźniak, Kotrlová, Kotulič Bunta, Kozlowski, KStuchlík otrlová, Lattimer, Lattimer, M. Urbanec, McClintock, Miller, Miller, Montero, Méndez, Okazaki, Ortega-Rodríguez, P. Bakala, P. Čech, Paczyński, Psaltis, Rebusco, Rebusco, Reynolds, Rezzolla, Rezzolla, Rubio-Herrera, Schnittman, Silbergleit, Straub, Stuchlík, Török, Török, Török, Török, Török, Török, Török, Török, Török, Török, Urbanec, van der Klis, Vio, Wagoner, Wagoner, Wagoner, Z. Stuchlík, Zanotti, Zanotti, Říkovská Stone, Šrámková, Šrámková   +90 more
core   +1 more source