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Summary of community detection algorithms in igraph 0.6 - Bommarito ConsultingBommarito Consulting, LLC. Based on Launchpad traffic and mailing list responses, Gabor and Tamas will soon be releasing igraph 0.6.

Summary of community detection algorithms in igraph 0.6 - Bommarito ConsultingBommarito Consulting, LLC

Article metrics for: Quantifying Trading Behavior in Financial Markets Using Google Trends : Scientific Reports. [1405.3117] Be In The Know: Connecting News Articles to Relevant Twitter Conversations. Cluster your Twitter Data with R and k-means. Hello everbody!

Cluster your Twitter Data with R and k-means

Today I want to show you how you can get deeper insights into your Twitter followers with the help of R. Because I just completed the course “Machine Learning” by Prof. Andrew Ng on Coursera I will use the k-means algorithm and cluster my Twitter followers by the ratio of their followers and how many people they follow. Setup. Anomaly detection in online social networks — ScienceDirect. Highlights We review current approaches to detecting anomalies in social networks.

Anomaly detection in online social networks — ScienceDirect

We identify key attributes of anomalies and use these to categorise detection methods. We generalise the process of anomaly detection into five main steps. We identify important areas for future research. [1406.2720] The Effect of Social Learning on Individual Learning and Evolution. Influence Modeling of System Interactions. What is a latent structure influence process ?

Influence Modeling of System Interactions

A stochastic process of human related behaviors normally involves a large and highly structured latent-state (probability) space. The latent structure influence process is a state-space model that effectively compresses the large latent-state space by exploring and exploiting the structure in this space. [1402.4540] A Unifying Framework for Measuring Weighted Rich Clubs by Integrating Randomized Controls. [1309.7233] Multilayer Networks. Positive Network Assortativity of Influenza Vaccination at a High School: Implications for Outbreak Risk and Herd Immunity. Schools are known to play a significant role in the spread of influenza.

High vaccination coverage can reduce infectious disease spread within schools and the wider community through vaccine-induced immunity in vaccinated individuals and through the indirect effects afforded by herd immunity. In general, herd immunity is greatest when vaccination coverage is highest, but clusters of unvaccinated individuals can reduce herd immunity. Here, we empirically assess the extent of such clustering by measuring whether vaccinated individuals are randomly distributed or demonstrate positive assortativity across a United States high school contact network. Table of Contents — February 2014, 39 (1) Paperscape. Towards a Methodology for Validation of Centrality Measures in Complex Networks. Background Living systems are associated with Social networks — networks made up of nodes, some of which may be more important in various aspects as compared to others.

Towards a Methodology for Validation of Centrality Measures in Complex Networks

While different quantitative measures labeled as “centralities” have previously been used in the network analysis community to find out influential nodes in a network, it is debatable how valid the centrality measures actually are. Statistical Thinking: The Bedrock of Data Science. By Joel B.

Statistical Thinking: The Bedrock of Data Science

Greenhouse Thanks to Google Chief Economist Hal Varian's 2009 prediction that "the sexy job in the next 10 years will be statisticians," it is now OK to self-identify as a statistician. This calls for some explanation. For many, their first experience with statistics was anything but pleasant, so telling someone you are a statistician has often been a conversation stopper -- or worse. How network theory is informing cognitive science. Aug. 8, 2013 10:33 a.m.

How network theory is informing cognitive science

Networks have long played a key role in cognitive science, from artificial neural networks to spreading activation models of semantic memory. Recently, a new network science has been developed, providing insights into the emergence of global, system-scale properties in contexts as diverse as the Internet, metabolic reactions, and collaborations among scientists. Today, the inclusion of network theory into cognitive sciences, and the expansion of complex-systems science, promises to significantly change the way in which the organization and dynamics of cognitive and behavioral processes are understood, according to a recent paper co-authored by SFI External Professor Morten Christiansen that reviews recent contributions of network theory to the cognitive sciences.

Read the paper in Trends in Cognitive Science. Huffington Post. Co-authored with Catherine M.

Huffington Post

Machalaba, MPH Novel diseases and pandemics have captured our global attention. How to quantify success. [1306.4626] Activity clocks: spreading dynamics on temporal networks of human contact. Google searches can predict stock markets, study finds. Lathia_mcss2013. Random alliance networks. A Centre Marc Bloch, CNRS/MAEE/HU, Friedrichstr 191, D-10117 Berlin, Germany b Centre d’analyse et de mathématique sociales, CNRS/EHESS, 190 avenue de France, F-75013 Paris, France c Institut National d’Etudes Démographiques, 133 boulevard Davout, F-75011 Paris, France d Laboratoire d’Anthropologie Sociale, Collège de France/CNRS/EHESS, 52 Rue du Cardinal Lemoine, F-75005 Paris, France Available online 25 May 2013.

Random alliance networks

Early-warning signals of topological collapse in interbank networks : Scientific Reports. Data For our analysis we focus on the recent global financial crisis, that manifested itself at the end of 2007 and continued throughout 20083, and on its build-up phase, which is much more difficult to identify.

Early-warning signals of topological collapse in interbank networks : Scientific Reports

We selected a dataset reporting 44 quarterly snapshots of the Dutch Interbank Network (DIN in the following), starting from the first quarter of 1998 and ending with the last quarter of 20089. Each snapshot reports the exposures between Dutch banks at the end of the corresponding quarter, and represents them as binary links directed from the borrower to the lender. Our data include the year when the crisis manifested itself in its strongest form (2008) plus the preceding 10 years, arguably the build-up phase. Same_sex_sexual_attraction_does_not_spread. [1210.2376] Interdependence and Predictability of Human Mobility and Social Interactions. Self-Healing Networks: Redundancy and Structure.

[1310.4377] Hierarchical block structures and high-resolution model selection in large networks. [1307.2278] Collective Philanthropy: Describing and Modeling the Ecology of Giving. ComplexityAdvice. Scientists Create Cybernetic Links Between People—by DJing - Facts So Romantic. Complex networks researcher at IU fighting crime with mobile phone data: IUB Newsroom: Indiana University. Emilio Ferrara has worked with Italian authorities on murder, robbery cases April 16, 2014 BLOOMINGTON, Ind. -- Emilio Ferrara, a post-doctoral researcher at Indiana University’s Center for Complex Networks and Systems Research, is using network science and a connected society to fight crime. Ferrara and collaborators from the University of Messina, Italy, have already assisted police in Italy with investigations into murder, bribery, robbery, drug trafficking and prostitution by using social network modeling to conduct criminal network analysis using phone call data obtained by police.

Unlike the broad, dragnet-style searches of phone call records the U.S. National Security Agency has been criticized for, the four computer scientists are conducting large-scale analysis of digital phone traces obtained by Italian police through court warrants.