Results 41 to 50 of about 233,826 (182)

A study of X-ray point sources in Heiles Clouds 1 and 2

Acta Polytechnica
Star formation takes place in the coldest parts of molecular clouds, beginning in the densest, collapsing regions of filaments. As pre-main sequence stars are luminous X-ray emitters, X-ray point sources can serve as effective tracers of YSOs.
Nóra Varga, András Péter Joó, Bendegúz Koncz   +2 more
doaj   +1 more source

Total Polarisation Conversion in Two-dimensional Electron System under Cyclotron Resonance Conditions

, 2001
The polarisation conversion of a linear polarised electromagnetic wave incident onto a two-dimensional (2D) electron system at an angle is theoretically studied.
Bakunov M I, Born M, Galchenkov L A, T V Teperik, V V Popov, Volkov V A, Volkov V A   +6 more
core   +2 more sources

Polarisation-independent Bragg gratings in ion-exchanged glass channel waveguides [PDF]

, 2000
The polarisation dependence of Bragg gratings photowritten in ion-exchanged glass waveguides is characterised for waveguides with different mask-opening widths and burial depths.
Drapp, B., Geraghty, D. F., Honkanen, S., Ingenhoff, J., Morrell, M. M., Peyghambarian, N., Provenzano, D., Yariv, A.   +7 more
core   +1 more source

Modelling the X-ray polarimetric signatures of complex geometry: the case study of the "changing look" AGN NGC 1365

, 2013
"Changing look" Active Galactic Nuclei (AGN) are a subset of Seyfert galaxies characterized by rapid transitions between Compton-thin and Compton-thick regimes.
Dovciak, Michal, Goosmann, Rene W., Grosso, Nicolas, Karas, Vladimir, Marin, Frederic, Muleri, Fabio, Porquet, Delphine   +6 more
core   +2 more sources

An entangled two photon source using biexciton emission of an asymmetric quantum dot in a cavity [PDF]

, 2002
A semiconductor based scheme has been proposed for generating entangled photon pairs from the radiative decay of an electrically-pumped biexciton in a quantum dot.
A. Imamoḡlu, C. H. W. Barnes, D. Birkedal, D. Branning, D. Gammon, F. Knill, G. Chen, G. J. Milburn, H.M. Wiseman, I. Robert, J.M. Gérard, K. Edamatsu, M. Pelton, N. Gisin, O. Benson, P. Borri, R.M. Stevenson, S.V. Gupalov, T. Flissikowski, T. M. Stace, V.D. Kulakovskii, Z.L. Yuan   +21 more
core   +4 more sources

Trends of Social Polarisation and Segregation in Athens (1991–2011)

Social Inclusion, 2021
This article investigates social and spatial changes in the Athens metropolitan area between 1991 and 2011. The main question is whether social polarisation—and the contraction of intermediate occupational categories—unevenly developed across the city is
Thomas Maloutas, Hugo Botton
doaj   +1 more source

Influence of electrode geometry and NLLS fit analysis of I-V measurements in a three-electrode cell [PDF]

, 1988
The analysis of electrode polarisation (I-V) measurements of oxygen electrodes on δ-Bi2O3-based solid electrolytes is complicated by an ohmic polarisation correction which is of the order of the electrode resistance.
Boukamp, B.A., Burggraaf, A.J., Seshan, K., Vinke, I.C., Vries, K.J. de   +4 more
core   +3 more sources

Value Conflicts and the (Post) Democratic Constellation of Society

Partecipazione e Conflitto
Western democracies rather than being consolidated are increasingly shattered by new value and identitarian conflicts. Instead of a widening consensus about core democratic values, we observe the intensification of value polarisation.
Hans-Jörg Trenz
doaj   +1 more source

Optical polarisation variability of radio loud narrow line Seyfert 1 galaxies. Search for long rotations of the polarisation plane [PDF]

, 2018
Narrow line Seyfert 1 galaxies (NLSy1s) constitute the AGN subclass associated with systematically smaller black hole masses. A few radio loud ones have been detected in MeV -- GeV energy bands by Fermi and evidence for the presence of blazar-like jets ...
Angelakis, E., Blinov, D., Eggen, J., Itoh, R., Kiehlmann, S., Marchili, N., Myserlis, I., Zensus, J. A.   +7 more
core   +4 more sources

Do lulismo ao antipetismo? Polarização, partidarismo e voto nas eleições presidenciais brasileiras

Opinião Pública
Resumo O debate recente sobre identificação partidária e comportamento eleitoral no Brasil vem apontando para a crescente importância do posicionamento dos eleitores com respeito aos principais partidos presidenciais – PT e PSDB – na escolha dos ...
André Borges, Robert Vidigal
doaj   +1 more source