Small-worldness index

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August undefined, 2024

WebNov 28, 2024 · From Table 5, within global topological properties three groups had a small-world connectome organisation, as the mean small-worldness index was greater than one. There were statistically significant differences in terms of small-worldness index (p = 0.004). Patients receiving chemotherapy had the lowest mean small-worldness index, … WebJul 1, 2011 · A small-worldness index was proposed to measure the degree of small-worldness in networks (Humphries and Gurney, 2008, Humphries et al., 2006). This …

Self-organisation of small-world networks by adaptive …

WebApr 30, 2008 · A network is now deemed a ‘small-world’ if S>1 - an assertion which may be tested statistically. We then examined the behavior of S on a large data-set of real-world … WebThe small-world coefficient is defined as: sigma = C/Cr / L/Lr where C and L are respectively the average clustering coefficient and average shortest path length of G. Cr and Lr are respectively the average clustering coefficient and average shortest path length of an equivalent random graph. sickness wiki

R: Compute the small-worldness index.

WebHosted on the Open Science Framework WebHumphries and Gurney [ 34] introduced a small-worldness metric which uses the network-average clustering coefficient and path length values, relative to these metrics for random networks, to provide an overview of connectivity in the entire network. WebTo consider a network as "smallworld", it is also suggested to inspect that the network has a transitivity substantially higher than comparable random networks and that its average … sickness where you cough up flower petals

smallworldness: Compute the small-worldness index. in qgraph: Graph

WebJan 23, 2024 · The small-worldness index can simultaneously reflect the integration and segregation. Thus, small-worldness might be more sensitive than the other network measures because two measures act as variables. It can be assumed that alterations in structural covariance network with a decrease in the brain efficiency may play an … WebSep 21, 2016 · As a simple scalar measure of “small-worldness,” Humphries and colleagues defined the small-world index, σ to be the ratio of the clustering coefficient (normalized by … the pic and bowWebJul 29, 2024 · Finally, the small-worldness index (SWI) reflects the efficiency of the functional organisation of the network or graph, and is measured as the ratio between the normalised clustering coefficient ... sickness will be no more

"WebThen the small-worldness metric, sw, is given by the ratio of Equations (12 and 13), s w = γ λ. ( 14) In a binary framework, small world networks have γ > 1 and λ ~ 1 and present a … " - Small-worldness index

Small-worldness index

Frontiers Small Worldness in Dense and Weighted Connectomes

WebJan 16, 2024 · In the present study, we found that the global small-worldness index was higher in the evening after the whole day of functioning, compared with the morning, regardless of the participant’s chronotype. Results on small-worldness of human brain networks in relation to time of day and participant fatigue level remain mixed and even … WebApr 18, 2015 · The small-worldness is believed to be a crucial aspect of efficient brain organization that confers significant advantages in signal processing (e.g., Lago-Fernández et al. 2000 ).

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WebJul 1, 2011 · It is known that the small-worldness index scales linearly with the network size (Humphries & Gurney, 2008). In other words, keeping the structural parameters of a network fixed and by increasing the number of nodes the small-worldness index expressed by S also increases (Fig. 1 A). However, we found that as more hub nodes underwent an attack ... WebSmall-world network Full size image Interpretation of graph metrics in the context of cognitive and behavioral outcomes is an area of ongoing investigation. It is likely an oversimplification to interpret a higher or lower value of most metrics as necessarily a positive or negative outcome (Bullmore & Bassett, 2011 ).

WebThe small-worldness index is then computed as the transitivity (normalized by the random transitivity) over the average shortest path length (normalized by the random average shortest path length). The lo and up quantiles of the distribution of the random networks are also returned for both the transitivity and the average shortest path length. http://www.sachaepskamp.com/qgraph/reference/smallworldness.html

WebBoth density and small worldness increase rapidly starting in 2003, reaching a maximum in 2004 and decreasing rapidly, falling to zero in 2005. The observed temporal development is more pronounced for small worldness, by an order of magnitude. More specifically, the small worldness increase is about by 3000%, while the density increase is about ... WebFeb 25, 2016 · The small-world index 15,16 is the most common statistic to quantify small-world structure in binary networks, but produces values greater than one for a large range …

WebSep 21, 2024 · Global and nodal properties were calculated and compared between two groups, including small-worldness index, clustering coefficient, characteristic path length, degree centrality ( DC ), betweenness centrality ( BC) and nodal efficiency. Both LDH and HC groups showed small-world architecture in the functional network of brain.

WebJul 6, 2024 · Although small-world index described by Humphries et al. is one of the most commonly used network features in brain network studies, we can find that it is not a … the picalilli 206WebFeb 27, 2024 · I am trying to calculate small-worldness index using package qgraph. I create an igraph object and use the function: smallworldness(). The result is [Inf] or [NaN]. What … sickness wikipediaWebSep 13, 2024 · Exploratory partial Pearson’s correlation analyses showed that the small-worldness indices were positively correlated with ALSFRS ( r = 0.27, P = 0.017, Fig. 3 a); the degree centrality of the right medial orbital frontal cortex was negatively correlated with depression symptoms ( r = − 0.30, P = 0.011) (Fig. 3 b) and the nodal efficiency of the … the picaninny grampiansWebFeb 21, 2024 · In order to examine whether or not a network does satisfy the small-worldness property, three Graph Theoretic metrics are calculated across a range of intra-cluster rewiring probabilities, \... thepiccarelinkWebWe addressed the limits of small-world measures and defined new metric indices: the small-world efficiency (SWE) and the small-world angle (SWA), both based on the tradeoff … sickness what is rsvWebDec 7, 2015 · I want to calculate the small-world index for weighted graphs. I have tried the smallworldness from qgraph, but in the original paper of Humphries 2008, this index (if I … sickness with bad coughWebJul 1, 2011 · In this article, for a number of real-world as well as Watts–Strogatz model networks, we investigated the profile of the network small-worldness as random failures, … sickness well wishes