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community

Overview page. Subjects: Social Sciences — Arts and Humanities.

Many sociological and anthropological definitions exist, but most tend to privilege some combination of small-scale, relative boundedness, strong affective ties, traditionalism, and...

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Communities

Ginestra Bianconi.

in Multilayer Networks

June 2018; p ublished online July 2018 .

Chapter. Subjects: Mathematical and Statistical Physics; Computational Physics. 8438 words.

Multilayer networks have a mesoscale structure organized in multilayer communities, spanning different layers and often revealing important functional properties of the network. In this...

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Community structure

Mark Newman.

in Networks

July 2018; p ublished online October 2018 .

Chapter. Subjects: Mathematical and Statistical Physics. 32091 words.

A discussion of community structure in networks and methods for its detection. The chapter begins with an introduction to the idea of community structure, followed by descriptions of a...

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Graph structures: communities

Guido Caldarelli.

in Scale-Free Networks

May 2007; p ublished online January 2010 .

Chapter. Subjects: Mathematical and Statistical Physics. 8144 words.

This chapter provides an explanation and analysis of a series of algorithms commonly used to compute communities in complex networks.

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Community structure of networks

Ernesto Estrada.

in The Structure of Complex Networks

October 2011; p ublished online December 2013 .

Chapter. Subjects: Mathematical and Statistical Physics. 10633 words.

This chapter discusses the methods currently used for detecting network communities. It starts with an intuitive introduction of the concept of network community. The chapter then considers...

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Motifs, cliques, communities

Sergey N. Dorogovtsev.

in Lectures on Complex Networks

February 2010; p ublished online May 2010 .

Chapter. Subjects: Mathematical and Statistical Physics. 5870 words.

This chapter discusses subgraphs in complex networks. First, it considers ‘building blocks’ of networks-motifs subgraphs that are present in many copies in a network. It focuses on the...

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Computational complexity, phase transitions, and message-passing for community detection

Cristopher Moore.

in Statistical Physics, Optimization, Inference, and Message-Passing Algorithms

December 2015; p ublished online March 2016 .

Chapter. Subjects: Mathematical and Statistical Physics. 13284 words.

This chapter provides a whirlwind tour of problems and techniques at the boundary of computer science and statistical physics. It starts with a brief description of computational complexity...

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World Wide Web, Wikipedia, and Social Networks

Guido Caldarelli and Alessandro Chessa.

in Data Science and Complex Networks

September 2016; p ublished online December 2016 .

Chapter. Subjects: Mathematical and Statistical Physics. 5434 words.

The World Wide Web (WWW) is an information network built on top of the Internet. Its graph structure is given by the hyperlink connections among web pages. Many important services run over...

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Introduction

Mark Newman.

in Networks

July 2018; p ublished online October 2018 .

Chapter. Subjects: Mathematical and Statistical Physics. 4658 words.

An overview of topics discussed in the book. The introduction starts with a discussion of a range of example networks including the internet, social networks, the world wide web, and...

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Financial market models with global interactions

NEIL F. JOHNSON, PAUL JEFFERIES and PAK MING HUI.

in Financial Market Complexity

July 2003; p ublished online January 2010 .

Chapter. Subjects: Mathematical and Statistical Physics. 22173 words.

Simple models of a population of heterogeneous agents (traders) open the way to next-generation finance. These models offer something significant in return to the scientific community: they...

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Matrix algorithms and graph partitioning

M. E. J. Newman.

in Networks

March 2010; p ublished online September 2010 .

Chapter. Subjects: Mathematical and Statistical Physics. 19666 words.

The preceding chapter discussed a variety of computer algorithms for calculating quantities of interest on networks, including degrees, centralities, shortest paths, and connectivity. This...

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The Langevin approach to modelling Brownian motion

Peter Richmond, Jürgen Mimkes and Stefan Hutzler.

in Econophysics and Physical Economics

September 2013; p ublished online December 2013 .

Chapter. Subjects: Mathematical and Statistical Physics. 2486 words.

This chapter expands on the essential points of the theory of Brownian motion. It follows Langevin's approach, developed in 1908, and described by him as ‘infinitely more simple’ than...

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The Brownian motion model of asset prices

Peter Richmond, Jürgen Mimkes and Stefan Hutzler.

in Econophysics and Physical Economics

September 2013; p ublished online December 2013 .

Chapter. Subjects: Mathematical and Statistical Physics. 5031 words.

This chapter shows that Bachelier predated Einstein with his PhD thesis entitled ‘Theorie de la Speculation’, a complete analysis of futures and options, based on the ideas of random...

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Nonlinear nanoelectromechanical systems

R. Karabalin and M. L. Roukes.

in Fluctuating Nonlinear Oscillators

July 2012; p ublished online September 2012 .

Chapter. Subjects: Mathematical and Statistical Physics. 17587 words.

The emerging field of NEMS has spawned an exceptional recent growth of activity amongst the research and engineering communities. Among the many interesting attributes of NEMS, they possess...

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Graphs on structured spaces

A.C.C. Coolen, A. Annibale and E.S. Roberts.

in Generating Random Networks and Graphs

March 2017; p ublished online May 2017 .

Chapter. Subjects: Mathematical and Statistical Physics. 11013 words.

This chapter moves beyond viewing nodes as homogeneous dots set on a plane. To introduce more complicated underlying space, multiplex networks (which are defined with layers of interaction...

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Overview of the statistical problem

W. David McComb.

in Homogeneous, Isotropic Turbulence

February 2014; p ublished online April 2014 .

Chapter. Subjects: Mathematical and Statistical Physics. 16576 words.

The nature of the ‘turbulence problem’ is discussed with particular reference to homogeneous, isotropic turbulence. An analogy is drawn between the turbulence problem and quantum field...

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Networks

Stefan Thurner, Rudolf Hanel and Peter Klimekl.

in Introduction to the Theory of Complex Systems

September 2018; p ublished online November 2018 .

Chapter. Subjects: Mathematical and Statistical Physics. 40580 words.

Understanding the interactions between the components of a system is key to understanding it. In complex systems, interactions are usually not uniform, not isotropic and not homogeneous:...

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Councils, Boards, Committees and Panels

Ken Peach.

in Managing Science

November 2017; p ublished online December 2017 .

Chapter. Subjects: Mathematical and Statistical Physics. 3900 words.

This chapter discusses the hierarchy, governance and role of the committee structure of universities and laboratories, along with the rights and responsibilities of the committee members....

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Epidemics on networks

M. E. J. Newman.

in Networks

March 2010; p ublished online September 2010 .

Chapter. Subjects: Mathematical and Statistical Physics. 18042 words.

One of the reasons for the large investment the scientific community has made in the study of social networks is their connection with the spread of disease. Diseases spread over networks...

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Modern telecommunications: a playground for physicists?

Aris L. Moustakas.

in Stochastic Processes and Random Matrices

August 2017; p ublished online January 2018 .

Chapter. Subjects: Mathematical and Statistical Physics. 12297 words.

Data traffic in wireless networks has been increasing exponentially for a long time and is expected to continue this trend. The emerging data-hungry applications, such as video-on-demand...

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Genetic networks

Ernesto Estrada.

in The Structure of Complex Networks

October 2011; p ublished online December 2013 .

Chapter. Subjects: Mathematical and Statistical Physics. 6109 words.

This chapter discusses the structural analysis of genetic networks. It starts by introducing general concepts of molecular biology and by accounting for the different kinds of genetic...

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