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Networks: structure, function and optimisation

Gupte, Neelima; Singh, Brajendra K.; Janaki, T.M. - In: Physica A: Statistical Mechanics and its Applications 346 (2005) 1, pp. 75-81

Recent studies have shown that the structure and connectivity properties of networks have important consequences for … and performance of these networks can be enormously enhanced by judicious manipulation of connectivity properties. We … performance and efficiency of networks. We examine this question in two specific contexts, the load-bearing properties of a …

Persistent link: https://www.econbiz.de/10010589208

Percolation thresholds of a group of anisotropic three-dimensional fracture networks

Khamforoush, M.; Shams, K. - In: Physica A: Statistical Mechanics and its Applications 385 (2007) 2, pp. 407-420

) fracture networks made of mono-disperse hexagons have been calculated numerically. The first model is when the fracture … networks are comprised of two groups of fractures that are distributed in an anisotropic manner about two orthogonal mean … that as the anisotropicity of networks increases, the percolation thresholds in X-, Y-, and Z-directions span the range of …

Persistent link: https://www.econbiz.de/10010874149

Pore space morphology analysis using maximal inscribed spheres

Silin, Dmitriy; Patzek, Tad - In: Physica A: Statistical Mechanics and its Applications 371 (2006) 2, pp. 336-360

A new robust algorithm analyzing the geometry and connectivity of the pore space of sedimentary rock is based on … establishes their respective volumes and connectivity. The proposed algorithm also produces a stick-and-ball diagram of the rock …

Persistent link: https://www.econbiz.de/10011057491

Percolation phenomena: a broad-brush introduction with some recent applications to porous media, liquid water, and city growth

Stanley, H. Eugene; Andrade, José S.; Havlin, Shlomo; … - In: Physica A: Statistical Mechanics and its Applications 266 (1999) 1, pp. 5-16

This brief overview is designed to introduce some of the advances that have occurred in our understanding of percolation phenomena. We organize our presentation around three simple questions: (i) What are percolation phenomena? (ii) Why do we care? (iii) What do we actually do? To answer the...

Persistent link: https://www.econbiz.de/10011057657

Ferromagnetic phase transition in Barabási–Albert networks

Aleksiejuk, Agata; Hołyst, Janusz A.; Stauffer, Dietrich - In: Physica A: Statistical Mechanics and its Applications 310 (2002) 1, pp. 260-266

Ising spins put onto a Barabási–Albert scale-free network show an effective phase transition from ferromagnetism to paramagnetism upon heating, with an effective critical temperature increasing as the logarithm of the system size. Starting with all spins up and upon equilibration pinning the...

Persistent link: https://www.econbiz.de/10011060678

Evolutionary minority games with small-world interactions

Kirley, Michael - In: Physica A: Statistical Mechanics and its Applications 365 (2006) 2, pp. 521-528

, ranging from regular lattices to random networks, are used to investigate the population dynamics. The results suggest that … agents sharing information in small-world networks can coordinate their behaviour more effectively than agents playing the …

Persistent link: https://www.econbiz.de/10011060681

Continuum percolation of simple fluids: energetic connectivity criteria

Pugnaloni, Luis A; Márquez, Ileana F; Vericat, Fernando - In: Physica A: Statistical Mechanics and its Applications 321 (2003) 3, pp. 398-410

properties of simple fluids based on an energetic connectivity criterion proposed long ago by T.L. Hill (J. Chem. Phys. 23 (1955 …) 617). This connectivity criterion appears to be the most appropriate in the study of gas–liquid phase transition. So far …

Persistent link: https://www.econbiz.de/10011061943

Residual closeness in networks

Dangalchev, Chavdar - In: Physica A: Statistical Mechanics and its Applications 365 (2006) 2, pp. 556-564

A new characteristic (residual closeness) which can measure the network resistance is presented. It evaluates closeness after removal of vertices or links, hence two types are considered—vertices and links residual closeness. This characteristic is more sensitive than the well-known measures...

Persistent link: https://www.econbiz.de/10011064223

Networked analysis of the Shanghai subway network, in China

Zhang, Jianhua; Xu, Xiaoming; Hong, Liu; Wang, Shuliang; … - In: Physica A: Statistical Mechanics and its Applications 390 (2011) 23, pp. 4562-4570

the critical threshold of this fraction is obtained. Two novel parameters called the functionality loss and connectivity … of subway lines are proposed for measuring the transport functionality and the connectivity of subway lines. Subway lines … 4 and 7 are selected as examples for evaluating the connectivity of lines subjected to different attack protocols. This …

Persistent link: https://www.econbiz.de/10010591731

The effects of node exclusion on the centrality measures in graph models of interacting economic agents

Caetano, Marco Antonio Leonel; Yoneyama, Takashi - In: Physica A: Statistical Mechanics and its Applications 430 (2015) C, pp. 216-223

This work concerns the study of the effects felt by a network as a whole when a specific node is perturbed. Many real world systems can be described by network models in which the interactions of the various agents can be represented as an edge of a graph. With a graph model in hand, it is...

Persistent link: https://www.econbiz.de/10011264554