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Community structures are found to exist ubiquitously in real-world complex networks. We address here the problem of community detection in directed networks. Most of the previous literature ignores edge directions and applies methods designed for community detection in undirected networks, which… |
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In this paper we revisit the problem of performing a QR-step on an unreduced
Hessenberg matrix H when we know an "exact" eigenvalue ?0 of H. Under exact arithmetic, this
eigenvalue will appear on diagonal of the transformed Hessenberg matrix H~ and will be decoupled
from the remaining part of the… |
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Usually, clinicians assess the correct hemodynamic behavior and fetal wellbeing during the gestational age thanks to their professional expertise, with
the support of some indices defined for Doppler fetal waveforms. Although
this approach has demonstrated to be satisfactory in the most of the… |
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Hybrid particle-continuum computational frameworks permit the simulation of gas flows by locally adjusting the resolution to the degree of non-equilibrium displayed by the flow in different regions of space and time. In this work, we present a new scheme that couples the direct simulation Monte… |
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REFIR is a Fourier Transform Spectrometer designed to measure the upwelling IR Earth's emission from space in the spectral range 100 to 1000 cm -1 with an unapodized spectral resolution of about 0.5 cm -1. One of the main scientific objectives of REFIR is to monitor the far IR planetary emission… |
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Nondestructive evaluation of hidden surface damage by means of stationary
thermographic methods requires the construction of approximated solutions
of a boundary identification problem for an elliptic equation. In this paper,
we describe and test a regularized reconstruction algorithm based on the… |
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Advanced persistent threats (APTs) have rocketed over the last years. Unfortunately, their technical characterization is incomplete--it is still unclear if they are advanced usages of regular malware or a different form of malware. This is key to develop an effective cyberdefense. To address this… |
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The definition of the Simon tensor, originally given only in Kerr spacetime and associated with the static family of observers, is generalized to any spacetime and to any possible observer family. Such generalization is obtained by a standard '3 + 1' splitting of the Bianchi identities, which are… |
