Navigation Links
Nature paper describes technique for extracting hierarchical structure of networks
Date:5/1/2008

Networks -- used throughout the sciences in the study of biological, technological, and social complexity -- can often be too complex to visualize or understand.

In a May 1 Nature paper, Hierarchical structure and the prediction of missing links in networks, Santa Fe Institute (SFI) researchers Aaron Clauset, Cristopher Moore, and Mark Newman show that many real-world networks can be understood as a hierarchy of modules, where nodes cluster together to form modules, which themselves cluster into larger modules -- arrangements similar to the organization of sports players into teams, teams into conferences, and conferences into leagues, for example.

This hierarchical organization, the researchers show, can simultaneously explain a number of patterns previously discovered in networks, such as the surprising heterogeneity in the number of connections some nodes have, or the prevalence of triangles in a network diagram. Their discovery suggests that hierarchy may, in fact, be a fundamental organizational principle for complex networks.

Unlike much previous work in this area, Clauset, Moore, and Newman propose a direct but flexible model of hierarchical structure, which they apply to networks using the tools of statistical physics and machine learning.

To demonstrate the practical utility of their model, they analyze networks from three disparate fields: the metabolic network of the spirochete Treponema pallidum (the bacteria that causes syphilis), a network of associations between terrorists, and a food web of grassland species. Even when only half of the connections in these networks were shown to their algorithm, the researchers found that hierarchical structure can predict missing connections with an accuracy of up to 80 percent.

Many networks, particularly those in the biological sciences, are not well understood, says Clauset, an SFI Postdoctoral Fellow. "But hierarchy offers a way to understand their large-scale organization and, from this, predict what interactions we might have missed.


'/>"/>

Contact: Aaron Clauset
aaronc@santafe.edu
505-946-2774
Santa Fe Institute
Source:Eurekalert

Related biology news :

1. Male seahorses are natures Mr. Mom, Texas A&M researchers say
2. Nurture over nature
3. AMNH scientists grace Science & Nature covers
4. Pediatricians alerted to the developmental nature of underage drinking in special journal supplement
5. 2008 Signature Genomic Laboratories Travel Award presented
6. K-State contributions to red flour beetle genome sequencing featured in March 27 issue of Nature
7. Genes selective signature aids detection of natural selection in microbial evolution
8. In nature -- and maybe the corner office -- scientists find that generalists can thrive
9. Iridescence workshop promotes natures nanotechnology
10. Entrust Digital Signatures Help Secure More Than 18 Million U.S. ePassports
11. Scientists enhance Mother Natures carbon handling mechanism
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/22/2017)... Optimove , provider of the ... as 1-800-Flowers and AdoreMe, today announced two new ... Using Optimove,s machine learning algorithms, these features allow ... recommendations to their customers based not just on ... intent drawn from a complex web of data ...
(Date:3/13/2017)... Future of security: Biometric Face Matching software  ... ... DERMALOGs Face Matching enables to match face pictures against each other or against ... (PRNewsFoto/Dermalog Identification Systems) ... Matching" is the fastest software for biometric Face Matching on the market. The ...
(Date:3/6/2017)... March 6, 2017 Mintigo , ... today announced Predictive Sales Coach TM , its ... sales intelligence into Salesforce. This unique AI application ... sales organizations with deep knowledge of their customers ... intelligent engagement. Predictive Sales Coach extends Mintigo,s existing ...
Breaking Biology News(10 mins):
(Date:3/24/2017)... NEW YORK , March 24, 2017 ... Composite ended the trading session at 5,817.69, down 0.07%; ... finish at 20,656.58; and the S&P 500 closed at ... session as 4 sectors closed in green, 4 sectors ... the day. This Friday, Stock-Callers.com has initiated reports coverage ...
(Date:3/23/2017)... ... 2017 , ... Lajollacooks4u is proud to announce it has become the premiere team-building cooking event ... companies around the world, such as Illumina, HP and Qualcomm, and is ranked #1 in ... popularity is due to its new team building format, a way for teams to not ...
(Date:3/23/2017)... LOUISVILLE, Colo. , March 23, 2017  GlobeImmune, ... purchase agreement for the sale of 12,835,490 shares of ... the  NantWorks  ecosystem of companies. In connection with the sale ... GlobeImmune $100,000 in cash and issue to GlobeImmune 200,000 ... common stock. "We are pleased to ...
(Date:3/23/2017)... YORK , March 23, 2017 ... ... of death, putting significant strain on health care systems, in ... cancer diagnoses rises, so too does the development of innovative ... minimum side effects. Among the many types of cancer treatments, ...
Breaking Biology Technology: