Small-worldness index

Author: klzk

August undefined, 2024

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. WebSep 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 …

National Center for Biotechnology Information

WebJul 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 ... WebApr 15, 2024 · Such a network has a small-world index >1, including a clustering coefficient that has a ratio > 1 compared to random networks, and a characteristic path length with a ratio close to 1 that is like that of random networks. ... Corresponding small-worldness and network measures in both TTM and controls suggest brain networks that generally have ... earth to kids inc

how to calculate small-world index in weighted networks

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 … http://www.endmemo.com/rfile/qgr_smallworldness.php WebDec 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 … ctr hmrc

Compute the small-worldness index. — smallworldness • qgraph

R qgraph::smallworldness -- EndMemo

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. ctr holdings limitedWebFeb 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 … ctr holdings

"WebJul 11, 2024 · The small-worldness index has also been calculated to extract topology descriptors of brain networks to understand WM phases . These indicators are effective in assessing overall network topography but are not at local important brain regions where activities are generally associated with cognitive tasks. " - Small-worldness index

Small-worldness index

Frontiers Small Worldness in Dense and Weighted Connectomes

WebJan 5, 2024 · Ketamine and CP-101,606 diminished the global clustering coefficient and small-worldness index. At the nodal level, all compounds induced increased connectivity of the regions mediating reward and cognitive aspects of emotional processing, such as ventromedial prefrontal cortex, septal nuclei, and nucleus accumbens. 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 ).

Did you know?

WebIn terms of the EEG functional network, the small-worldness index significantly reduced by 3.5% (p < 0.05) and the characteristic path length increased by 1.8% (p < 0.10) at the end of the session compared to the baseline. No obvious change was found in the seizure frequency during follow-up (p > 0.05). The Mini-Mental State Examination (MMSE ... 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.

http://www.sachaepskamp.com/qgraph/reference/smallworldness.html WebHosted on the Open Science Framework

WebMar 31, 2024 · Compute the small-worldness index (Humphries & Gurney, 2008) relying on the global transitity of the network (Newman, 2003) and on its average shortest path … WebJun 1, 2024 · The small-world model is of special interest when describing human brain networks, because it supports efficient information segregation and integration with low …

WebA small world network is characterized by a small average shortest path length, and a large clustering coefficient. Small-worldness is commonly measured with the coefficient sigma or omega. Both coefficients compare the average clustering coefficient and shortest path …

WebCompute the small-worldness index (Humphries & Gurney, 2008) relying on the global transitity of the network (Newman, 2003) and on its average shortest path length. Usage smallworldness (x, B = 1000, up = 0.995, lo = 0.005) Arguments Details The function computes the transitivity of the target network and the average shortest path length. ctr hivWebJul 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 … earth to jupiter travel timeWebFeb 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 … earth to jupiter sizeWebSmall-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 ). earth to loonetteWebThe Small World Index (SWI) is defined as = Both ω′ and SWI range between 0 and 1, and have been shown to capture aspects of small-worldness. However, they adopt slightly … ctr hnoWebSource code for networkx.algorithms.smallworld. """Functions for estimating the small-world-ness of graphs. A small world network is characterized by a small average shortest path length, and a large clustering coefficient. Small-worldness is commonly measured with the coefficient sigma or omega. Both coefficients compare the average clustering ... ctr holding assets gmbhWebTo 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 … earth to luna a snail tale