scholarly journals An empirical characterization of community structures in complex networks using a bivariate map of quality metrics

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Vinh-Loc Dao ◽  
Cécile Bothorel ◽  
Philippe Lenca
Keyword(s):  
Complex Networks ◽  
Quality Metrics ◽  
Community Structures

Exploring wall shear stress spatiotemporal heterogeneity in coronary arteries combining correlation-based analysis and complex networks with computational hemodynamics

2020 ◽  
Vol 234 (11) ◽  
pp. 1209-1222 ◽  
Author(s):  
Karol Calò ◽  
Giuseppe De Nisco ◽  
Diego Gallo ◽  
Claudio Chiastra ◽  
Ayla Hoogendoorn ◽  
...  
Keyword(s):  
Shear Stress ◽  
Wall Shear Stress ◽  
Complex Networks ◽  
Coronary Arteries ◽  
Early Stage ◽  
Flow Direction ◽  
Computational Hemodynamics ◽  
Time Histories ◽  
Wall Shear

Atherosclerosis at the early stage in coronary arteries has been associated with low cycle-average wall shear stress magnitude. However, parallel to the identification of an established active role for low wall shear stress in the onset/progression of the atherosclerotic disease, a weak association between lesions localization and low/oscillatory wall shear stress has been observed. In the attempt to fully identify the wall shear stress phenotype triggering early atherosclerosis in coronary arteries, this exploratory study aims at enriching the characterization of wall shear stress emerging features combining correlation-based analysis and complex networks theory with computational hemodynamics. The final goal is the characterization of the spatiotemporal and topological heterogeneity of wall shear stress waveforms along the cardiac cycle. In detail, here time-histories of wall shear stress magnitude and wall shear stress projection along the main flow direction and orthogonal to it (a measure of wall shear stress multidirectionality) are analyzed in a representative dataset of 10 left anterior descending pig coronary artery computational hemodynamics models. Among the main findings, we report that the proposed analysis quantitatively demonstrates that the model-specific inlet flow-rate shapes wall shear stress time-histories. Moreover, it emerges that a combined effect of low wall shear stress magnitude and of the shape of the wall shear stress–based descriptors time-histories could trigger atherosclerosis at its earliest stage. The findings of this work suggest for new experiments to provide a clearer determination of the wall shear stress phenotype which is at the basis of the so-called arterial hemodynamic risk hypothesis in coronary arteries.

scholarly journals Visualizing real-world networks

2021 ◽  
Author(s):  
Lyndsay Roach
Keyword(s):  
Complex Networks ◽  
Real World ◽  
The Internet ◽  
Network Data ◽  
Community Structures ◽  
Large Networks ◽  
Computing Power ◽  
On Line ◽  
Using Data ◽  
The Impact

The study of networks has been propelled by improvements in computing power, enabling our ability to mine and store large amounts of network data. Moreover, the ubiquity of the internet has afforded us access to records of interactions that have previously been invisible. We are now able to study complex networks with anywhere from hundreds to billions of nodes; however, it is difficult to visualize large networks in a meaningful way. We explore the process of visualizing real-world networks. We first discuss the properties of complex networks and the mechanisms used in the network visualizing software Gephi. Then we provide examples of voting, trade, and linguistic networks using data extracted from on-line sources. We investigate the impact of hidden community structures on the analysis of these real-world networks.

scholarly journals Graph spectral characterization of the XY model on complex networks

2017 ◽  
Vol 96 (1) ◽  
Author(s):  
Paul Expert ◽  
Sarah de Nigris ◽  
Taro Takaguchi ◽  
Renaud Lambiotte
Keyword(s):  
Complex Networks ◽  
Spectral Characterization ◽  
Xy Model

Visualizing complex networks by leveraging community structures

2021 ◽  
Vol 565 ◽  
pp. 125506
Author(s):  
Zhenhua Huang ◽  
Junxian Wu ◽  
Wentao Zhu ◽  
Zhenyu Wang ◽  
Sharad Mehrotra ◽  
...  
Keyword(s):  
Complex Networks ◽  
Community Structures

scholarly journals Hierarchical Characterization of Complex Networks

2006 ◽  
Vol 125 (4) ◽  
pp. 841-872 ◽  
Author(s):  
Luciano da Fontoura Costa ◽  
Filipi Nascimento Silva
Keyword(s):  
Complex Networks
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