Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Dănilă, Bogdan"'
Publikováno v:
Eur. Phys. J. C 80, 617 (2020)
We investigate static and spherically symmetric solutions in a gravity theory that extends the standard Hilbert-Einstein action with a Lagrangian constructed from a three-form field $A_{\alpha \beta \gamma}$, which is related to the field strength an
Externí odkaz:
http://arxiv.org/abs/2004.06605
Publikováno v:
Phys. Rev. D 99, 064028 (2019)
We consider vacuum static spherically symmetric solutions in the hybrid metric-Palatini gravity theory, which is a combination of the metric and Palatini $f(R)$ formalisms unifying local constraints at the Solar System level and the late-time cosmic
Externí odkaz:
http://arxiv.org/abs/1811.02742
Publikováno v:
Advances in High Energy Physics, 2016, 7521464 (2016)
We perform the study of the stability of the cosmological scalar field models, by using the Jacobi stability analysis, or the Kosambi-Cartan-Chern (KCC) theory. In the KCC approach we describe the time evolution of the scalar field cosmologies in geo
Externí odkaz:
http://arxiv.org/abs/1609.05636
Publikováno v:
Phys. Rev. D 95, 044031 (2017)
We consider the internal structure and the physical properties of specific classes of neutron, quark and Bose-Einstein Condensate stars in the hybrid metric-Palatini gravity theory, which is a combination of the metric and Palatini $f(R)$ formalisms.
Externí odkaz:
http://arxiv.org/abs/1608.02783
Publikováno v:
MNRAS 453, 2982:2991 (2015)
We investigate the transition to Self Organized Criticality in a two-dimensional model of a flux tube with a background flow. The magnetic induction equation, represented by a partial differential equation with a stochastic source term, is discretize
Externí odkaz:
http://arxiv.org/abs/1508.02305
Autor:
Danila, Bogdan
Publikováno v:
Phys. Rev. E 93, 022301 (2016)
A simple but efficient spectral approach for analyzing the community structure of complex networks is introduced. It works the same way for all types of networks, by spectrally splitting the adjacency matrix into a "unipartite" and a "multipartite" c
Externí odkaz:
http://arxiv.org/abs/1506.06395
Publikováno v:
Eur. Phys. J. C (2015) 75:203
Due to their superfluid properties some compact astrophysical objects, like neutron or quark stars, may contain a significant part of their matter in the form of a Bose-Einstein Condensate. Observationally distinguishing between neutron/quark stars a
Externí odkaz:
http://arxiv.org/abs/1504.06014
Publikováno v:
Phys Rev E 80 (6) 066116, 2009
We show that the capacity of a complex network that models a city street grid to support congested traffic can be optimized by using routes that collectively minimize the maximum ratio of betweenness to capacity in any link. Networks with a heterogen
Externí odkaz:
http://arxiv.org/abs/0902.2415
The community structure of a complex network can be determined by finding the partitioning of its nodes that maximizes modularity. Many of the proposed algorithms for doing this work by recursively bisecting the network. We show that this unduely con
Externí odkaz:
http://arxiv.org/abs/0901.2151
We present a study of the application of a variant of a recently introduced heuristic algorithm for the optimization of transport routes on complex networks to the problem of finding the optimal routes of communication between nodes on wireless netwo
Externí odkaz:
http://arxiv.org/abs/physics/0703261