Navigation Links
MIT control theory research: How to control complex networks
Date:5/12/2011

tine says. Control research on large networks has been concerned mostly with questions of synchronization, he says.

In the past 10 years, researchers have learned a great deal about the organization of such networks, in particular their topology the patterns of connections between different points, or nodes, in the network. Slotine and his colleagues applied traditional control theory to these recent advances, devising a new model for controlling complex, self-assembling networks.

The researchers started by devising a new computer algorithm to determine how many nodes in a particular network need to be controlled in order to gain control of the entire network. (Examples of nodes include members of a social network, or single neurons in the brain.)

"The obvious answer is to put input to all of the nodes of the network, and you can, but that's a silly answer," Slotine says. "The question is how to find a much smaller set of nodes that allows you to do that."

There are other algorithms that can answer this question, but most of them take far too long years, even. The new algorithm quickly tells you both how many points need to be controlled, and where those points known as "driver nodes" are located.

Next, the researchers figured out what determines the number of driver nodes, which is unique to each network. They found that the number depends on a property called "degree distribution," which describes the number of connections per node.

A higher average degree (meaning the points are densely connected) means fewer nodes are needed to control the entire network. Sparse networks, which have fewer connections, are more difficult to control, as are networks where the node degrees are highly variable.

In future work, Slotine and his collaborators plan to delve further into biological networks, such as those governing metabolism. Figuring out how bacterial metabolic networks are controlled could help biologi
'/>"/>

Contact: Caroline McCall
cmccall5@mit.edu
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Ben-Gurion University students develop thought-controlled, hands-free computer for the disabled
2. Dopamine controls formation of new brain cells
3. People control thoughts better when they see their brain activity: UBC study
4. Starch-controlling gene fuels more protein in soybean plants
5. Immune therapy can control fertility in mammals
6. Getting closer to a better biocontrol for garden pests
7. Latest hands-free electronic water faucets found to be hindrance, not help, in infection control
8. €12 million ($16.9 million) project to develop new tools for malaria control
9. Asthma drug could help control or treat Alzheimers disease
10. Economics and evolution help scientists identify new strategy to control antibiotic resistance
11. World first -- Localized delivery of an anti-cancer drug by remote-controlled microcarriers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/21/2014)... which is commonly used as a farm soil fertilizer, ... genes from the cows, gut bacteria. The findings, reported ... the American Society for Microbiology, hints that cow manure ... resistance genes that transfer to bacteria in the soils ... resistance (AR) genes have already been identified, but the ...
(Date:4/21/2014)... Dallas have received a federal grant to investigate ... of many everyday products might affect human health. ... and Dr. Rockford Draper, professor of molecular and ... from the National Institute of Environmental Health Sciences, ... track how multi-walled carbon nanotubes interact with human ...
(Date:4/21/2014)... Professor Lawrence Krauss was honored at the Academia ... to public understanding of science and for his ... The Academia Film Olomouc award for Outstanding Communication ... on April 19, in Olomouc, Czech Republic. , ... of science documentary films, and the largest such ...
Breaking Biology News(10 mins):Cow manure harbors diverse new antibiotic resistance genes 2Cow manure harbors diverse new antibiotic resistance genes 3Grant to fund research on possible cell contaminants 2Grant to fund research on possible cell contaminants 3Lawrence Krauss is honored at international festival of science documentary films 2Lawrence Krauss is honored at international festival of science documentary films 3
... (Edmonton) Two University of Alberta researchers have published a step ... harmful chemicals on commercial crops by developing plants that produce ... biologist Allen Good says the energy required to produce nitrogen ... a $100 billion a year. Good says that while they ...
... adelgid, has been marching north along the Appalachians, killing almost ... forests in Georgia, Tennessee, and Virginia. The pest recently arrived ... only extreme cold stops the adelgid. But now a ... "fungal microfactory" technology that promises to give forest managers and ...
... joint meeting of the International Ethological Conference (IEC) and ... more than 1,100 researchers from around the world for ... Included among the speakers will be one of ... head of the Department of Ethology at the Etvs ...
Cached Biology News:Forest fungus factory 2Behavior 2011 to draw global contingent of more than 1,100 animal researchers to IU next week 2
(Date:1/14/2014)... and BETHESDA, Md. , ... joining together with two institutes from the National Institutes ... tools for bringing safer, more effective treatments to patients ... National Center for Advancing Translational Sciences (NCATS) and the ...
(Date:1/14/2014)... , Jan. 14, 2014  RXi Pharmaceuticals Corporation (OTCQX: ... and commercializing innovative therapies addressing major unmet medical ... received the Notice of Allowance from the United ... self-delivering RNAi compounds (sd-rxRNA®), for the treatment of ...
(Date:1/14/2014)... UK (PRWEB) January 13, 2014 Bob ... with more than 20 years in the industry, has ... photonics . Hainsey will serve as the society’s Science ... Dr. Hainsey join SPIE as our Technology Strategist, further ...
(Date:1/14/2014)... Independent publisher Bitingduck Press, with offices in ... big ideas for 2014 in production and sales of ... produce high-quality, low-cost, DRM-free ebooks and to use the ... The first major development will be bookstore sales in ...
Breaking Biology Technology:Organovo Announces Collaboration with National Institutes of Health 2Organovo Announces Collaboration with National Institutes of Health 3RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 3Photonics R&D Leader Bob Hainsey Joins SPIE Technical Staff 2Bitingduck Press Looks Forward to 2014 With Multimedia E-books 2
... MONICA, Calif., Oct. 9 Aida,Pharmaceuticals, Inc. ... China,s,leading pharmaceutical companies, today announced that the ... sale of Etimicin,sulfate throughout China. Aida expects ... to increase noticeably as sales efforts are,pursued ...
... Angiotech Pharmaceuticals,Inc. (NASDAQ: ANPI , TSX: ... company, today announced that it intends to ... Food and Drug Administration,(FDA) for its innovative, ... "After reviewing the data from our recently ...
... Pharmaceutical and biotech,companies reach much greater and sustained ... and marketing, balancing therapeutic,innovation with commercial focus in ... companies to break down the walls that have ... strengths of both,talented medical researchers and skillful marketers. ...
Cached Biology Technology:Sales of Etimicin Sulfate to Expand Nationwide as Government Restriction is Lifted 2Angiotech announces intent to file 510(k) for its innovative 5-FU Central Venous Catheter (CVC) based on positive results from pivotal trial 2Angiotech announces intent to file 510(k) for its innovative 5-FU Central Venous Catheter (CVC) based on positive results from pivotal trial 3Angiotech announces intent to file 510(k) for its innovative 5-FU Central Venous Catheter (CVC) based on positive results from pivotal trial 4Angiotech announces intent to file 510(k) for its innovative 5-FU Central Venous Catheter (CVC) based on positive results from pivotal trial 5Angiotech announces intent to file 510(k) for its innovative 5-FU Central Venous Catheter (CVC) based on positive results from pivotal trial 6Pharmaceutical Product Launch: Commercially Focused R&D Increases Drug's Market Potential 2