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- University of CreteGR206 papers
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8 papers · 1 filter
Chandra Observations of the Collisional Ring Galaxy NGC 922
A. H. Prestwich, J. L. Galache. T. Linden, V. Kalogara +5
In this paper we report on Chandra observations of the starburst galaxy NGC 922. NGC 922 is a drop-through ring galaxy with an expanding ring of star formation, similar in many res…
Patterns of variability in Be/X-ray pulsars during giant outbursts
Pablo Reig, Elisa Nespoli
The discovery of source states in the X-ray emission of black-hole binaries and neutron-star low-mass X-ray binaries constituted a major step forward in the understanding of the ph…
Gain-Driven Discrete Breathers in PT-Symmetric Nonlinear Metamaterials
N. Lazarides, G. P. Tsironis
We introduce a one dimensional parity-time (PT)-symmetric nonlinear magnetic metamaterial consisted of split ring dimers having both gain and loss. When nonlinearity is absent we f…
Tunable ferroelectricity in artificial tri-layer superlattices comprised of non-ferroic components
K. Rogdakis, J. W. Seo, Z. Viskadourakis +7
Heterostructured material systems devoid of ferroic components are presumed not to display ordering associated with ferroelectricity. In heterostructures composed of transition met…
Incorporating Causal Prior Knowledge as Path-Constraints in Bayesian Networks and Maximal Ancestral Graphs
Giorgos Borboudakis, Ioannis Tsamardinos
We consider the incorporation of causal knowledge about the presence or absence of (possibly indirect) causal relations into a causal model. Such causal relations correspond to dir…
Bi-quadratic magnetoelectric coupling in underdoped La_2CuO_{4+x}
S. Mukherjee, B. M. Andersen, Z. Viskadourakis +2
The recent discovery of relaxor ferroelectricity and magnetoelectric effect in lightly doped cuprate material La_2CuO_{4+x} has provided a number of questions concerning its theore…