Showing 1 - 10 of 110
Mobile telephones, company ID badges, and similar common devices form a sensor network which can be used to map human …
Persistent link: https://www.econbiz.de/10010589346
We empirically study various network properties of an online community. The numbers of articles written by each user to … the bulletin boards of each of the others are used to construct the directed and weighted network B, and gifting behaviors … among users are also kept track of, to build the network G which is again directed and weighted. Detailed analysis reveals …
Persistent link: https://www.econbiz.de/10010590755
Ranking nodes by their spreading ability in complex networks is a fundamental problem which relates to wide applications. Local metric like degree centrality is simple but less effective. Global metrics such as betweenness and closeness centrality perform well in ranking nodes, but are of high...
Persistent link: https://www.econbiz.de/10010873421
using a network approach, which describes the interlinks between boards of directors. Following mainstream literature, I … Board Network; I then apply three different vertex centrality measures: degree, betweenness and flow betweenness. What … emerges from the network construction and by applying the degree centrality is a structure with a large number of connections …
Persistent link: https://www.econbiz.de/10010873585
information is passed around the network. Nodes with high betweenness may be regarded as key players that have a highly active …. This new definition shares a similar philosophy to that of communicability for pairs of nodes in a network, which was … also describes network sensitivity when the edges of a given node are subject to infinitesimally small perturbations. Using …
Persistent link: https://www.econbiz.de/10010871654
We analyze the cross-correlation matrix C of the index returns of the main financial markets after the 2008 crisis using methods of random matrix theory. We test the eigenvalues of C for universal properties of random matrices and find that the majority of the cross-correlation coefficients...
Persistent link: https://www.econbiz.de/10010742315
Identifying influential nodes that lead to faster and wider spreading in complex networks is of theoretical and practical significance. The degree centrality method is very simple but of little relevance. Global metrics such as betweenness centrality and closeness centrality can better identify...
Persistent link: https://www.econbiz.de/10011057185
centrality of a node and to characterize its role in a network. Using the subway network of Boston and the London rapid transit … geometric properties of the network. Furthermore, evaluating the correlations between these inherited measures and classical …
Persistent link: https://www.econbiz.de/10011057609
we define as correlation plots of local and global network properties. We show that these fingerprints are suitable tools … centrality on different random-network models like Erdős–Rényi, small-world and Barabási–Albert as well as on different real …
Persistent link: https://www.econbiz.de/10011058406
This article proposes a new procedure to evaluate Asia Pacific stock market interconnections using a dynamic setting. Dynamic spanning trees (DST) are constructed using an ARMA–FIEGARCH–cDCC process. The main results show that: 1. the DST significantly shrinks over time; 2. Hong Kong is found...
Persistent link: https://www.econbiz.de/10011059164