output
20142022
most citedIdentification of Patient Zero in Static and Temporal Networks - Robustness and Limitations

104 citations

10 papers

astro-ph.CO2022★ 2 cited

Dark matter fluid constraints from galaxy rotation curves

Dalibor Perkovic, Hrvoje Stefancic

Galaxy rotation curves are considered to be convincing evidence for dark matter or some dynamically equivalent alternative mechanism. Starting only from the rotation curve data, we…

astro-ph.CO2020

Purely kinetic k-essence description of barotropic fluid models

Dalibor Perkovic, Hrvoje Stefancic

Purely kinetic k-essence models have been shown in the literature to be a field theory equivalent of barotropic fluid models of dark energy or dark matter-dark energy unification.…

q-bio.PE2020★ 19 cited

Bi-stability of SUDR+K model of epidemics and test kits applied to COVID-19

Vinko Zlatić, Irena Barjašić, Andrea Kadović +2

Motivated with various responses of world governments to COVID-19, here we develop a toy model of the dependence epidemics spreading on the availability of tests for disease. Our m…

gr-qc2020★ 31 cited

Barotropic fluid compatible parametrizations of dark energy

Dalibor Perkovic, Hrvoje Stefancic

Parametrizations of Equation of state parameter as a function of the scale factor or redshift are frequently used in dark energy modeling. The question investigated in this paper i…

q-fin.RM2019★ 14 cited

Controlling systemic risk - network structures that minimize it and node properties to calculate it

Sebastian M. Krause, Hrvoje Štefančić, Vinko Zlatić +1

Evaluation of systemic risk in networks of financial institutions in general requires information of inter-institution financial exposures. In the framework of Debt Rank algorithm,…

gr-qc2019★ 14 cited

Dark sector unifications: dark matter-phantom energy, dark matter -- constant dark energy, dark matter-dark energy-dark matter

Dalibor Perkovic, Hrvoje Stefancic

The paper brings a novel approach to unification of dark matter and dark energy in terms of a cosmic fluid. A model is introduced in which the cosmic fluid speed of sound squared i…

math.CA2018

Inequalities of the Edmundson-Lah-Ribarič type for n-convex functions with applications

Rozarija Mikić, Josip Pečarić, Djilda Pečarić

In this paper we derive some Edmundson-Lah-Ribaric type inequalities for positive linear functionals and n-convex functions. Main results are applied to the generalized f-divergenc…

astro-ph.CO2018★ 5 cited

Transient dark energy, cosmological constant boundary crossing and dark energy data fits

Dalibor Perkovic, Hrvoje Stefancic

The formalism of dark energy based on modeling speed of sound as a function of equation of state parameter is elaborated. A specific model which allows detailed study of cosmologic…

physics.soc-ph2014★ 8 cited

Extraction of Temporal Networks from Term Co-occurrences in Online Textual Sources

Marko Popović, Hrvoje Štefančić, Borut Sluban +5

A stream of unstructured news can be a valuable source of hidden relations between different entities, such as financial institutions, countries, or persons. We present an approach…

cs.SI2014★ 104 cited

Identification of Patient Zero in Static and Temporal Networks - Robustness and Limitations

Nino Antulov-Fantulin, Alen Lancic, Tomislav Smuc +2

Detection of patient-zero can give new insights to the epidemiologists about the nature of first transmissions into a population. In this paper, we study the statistical inference…