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The diminishing role of hubs in dynamical processes on complex networks

It is notoriously difficult to predict the behaviour of a complex self-organizing system, where the interactions among dynamical units form a heterogeneous topology. Even if the dynamics of each microscopic unit is known, a real understanding of their contributions to the macroscopic system behaviour is still lacking. Here, we develop information-theoretical methods to distinguish the contribution of each individual unit to the collective out-of-equilibrium dynamics. We show that for a system of units connected by a network of interaction potentials with an arbitrary degree distribution, highly connected units have less impact on the system dynamics when compared with intermediately connected units. In an equilibrium setting, the hubs are often found to dictate the long-term behaviour. However, we find both analytically and experimentally that the instantaneous states of these units have a short-lasting effect on the state trajectory of the entire system. We present qualitative evidence of this phenomenon from empirical findings about a social network of product recommendations, a protein–protein interaction network and a neural network, suggesting that it might indeed be a widespread property in nature.

 

"The diminishing role of hubs in dynamical processes on complex networks"

Quax R, Apolloni A and Sloot P.M.A.

Journal of the Royal Society Interface, 10, 20130568, published 4 September 2013

http://dx.doi.org/10.1098/rsif.2013.0568


Via Complexity Digest
june holley's insight:

Hubs arent as important as we think - in complex networks!

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Rick Quax's curator insight, September 25, 2013 8:19 AM

The inherent storage and transmission of information bits may provide new insights into the behavior of complex systems.

networks and network weaving
How networks can transform our world
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Tweet Chat #5: Re-imagining Cities through Collaboration

Tweet Chat #5: Re-imagining Cities through Collaboration | networks and network weaving | Scoop.it
How does the collaborative economy affect the way we live, work and move around cities? Sharing cities, cities as platform... How do these concepts differ from cities' traditional functions? We ca
june holley's insight:

This is tomorrow!

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Liz Rykert's curator insight, April 15, 10:49 PM

Tweet cat tomorrow. Thanks June Holley!

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Spreading dynamics on networks: the role of burstiness, topology and stationarity

Spreading on networks is influenced by a number of factors including different parts of the inter-event time distribution (IETD), the topology of the network and nonstationarity. In order to understand the role of these factors we study the SI model on temporal networks with different aggregated topologies and different IETDs. Based on analytic calculations and numerical simulations, we show that if the stationary bursty process is governed by power-law IETD, the spreading can be slowed down or accelerated as compared to a Poisson process; the speed is determined by the short time behaviour, which in our model is controlled by the exponent. We demonstrate that finite, so called "locally tree-like" networks, like the Barab\'asi-Albert networks behave very differently from real tree graphs if the IETD is strongly fat-tailed, as the lack or presence of rare alternative paths modifies the spreading. A further important result is that the non-stationarity of the dynamics has a significant effect on the spreading speed for strongly fat-tailed power-law IETDs, thus bursty processes characterized by small power-law exponents can cause slow spreading in the stationary state but also very rapid spreading heavily depending on the age of the processes.


Spreading dynamics on networks: the role of burstiness, topology and stationarity
Dávid X. Horváth, János Kertész

http://arxiv.org/abs/1404.2468


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PlexusCall: Mentoring Military Women - Plexus Institute

june holley's insight:

This should be excellent. Lots for network weavers to learn.

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Tamarack Learning Centre - Learn about Community Collaboration, Poverty Reduction, Leadership

Tamarack Learning Centre - Learn about Community Collaboration, Poverty Reduction, Leadership | networks and network weaving | Scoop.it
Tamarack's Learning Centre offers research, seminars and resources about community care, collaboration, leadership and poverty reduction in Canada and beyond.
june holley's insight:

Also download Paper on measuring social capital.

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Rescooped by june holley from 21st Century Learning and Teaching
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To Advance Education, We Must First Reimagine Society

To Advance Education, We Must First Reimagine Society | networks and network weaving | Scoop.it
Why haven't education reform efforts amounted to much? Because they start with the wrong problem, says John Abbott, director of the 21st Century Learning Initiative. Overhauling the educational paradigm means replacing the metaphor — the concept of the world and its inhabitants as machine-like entities — that has shaped the education system, as well as many other aspects of our culture.


Creating “Collaborative Learning Communities”

“It is essential to view learning as a total community responsibility,” he says, and to expect no short cuts. Children need to be integrated, fully contributing members of the broader community, so they can feel useful and valued. (It is not just the children who need this, he adds; healthy communities also need children.)

.

On a practical level, the most powerful lever for change, Abbott says, is people coming together to “rethink the role of community in the learning process,” agreeing how to divide up responsibilities among professional teachers and other community members, and then launching small pilot projects that are true to their new vision. These efforts will build on each other, he says, and large-scale change will follow.


Via Gust MEES
june holley's insight:
Not just for people involved in education!
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Silverback Learning's curator insight, April 7, 9:15 AM

Thinking  outside the box that has been public education since it's inception. This is a good read. 

Javier Antonio Bellina's curator insight, April 11, 1:32 PM

Educación y Sociedad

Bibiana Vargas's curator insight, April 13, 4:05 PM

Overschooled and undereducated.  Love the statement. Thinking of borrowing it soon.

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Predicting Successful Memes using Network and Community Structure

Predicting Successful Memes using Network and Community Structure | networks and network weaving | Scoop.it
We investigate the predictability of successful memes using their early spreading patterns in the underlying social networks. We propose and analyze a comprehensive set of features and develop an accurate model to predict future popularity of a meme given its early spreading patterns. Our paper provides the first comprehensive comparison of existing predictive frameworks. We categorize our features into three groups: influence of early adopters, community concentration, and characteristics of adoption time series. We find that features based on community structure are the most powerful predictors of future success. We also find that early popularity of a meme is not a good predictor of its future popularity, contrary to common belief. Our methods outperform other approaches, particularly in the task of detecting very popular or unpopular memes.
-- To be presented at ICWSM 2014

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A solution to the collective action problem in between-group conflict with within-group inequality

Conflict with conspecifics from neighbouring groups over territory, mating opportunities and other resources is observed in many social organisms, including humans. Here we investigate the evolutionary origins of social instincts, as shaped by selection resulting from between-group conflict in the presence of a collective action problem. We focus on the effects of the differences between individuals on the evolutionary dynamics. Our theoretical models predict that high-rank individuals, who are able to usurp a disproportional share of resources in within-group interactions, will act seemingly altruistically in between-group conflict, expending more effort and often having lower reproductive success than their low-rank group-mates. Similar behaviour is expected for individuals with higher motivation, higher strengths or lower costs, or for individuals in a leadership position. Our theory also provides an evolutionary foundation for classical equity theory, and it has implications for the origin of coercive leadership and for reproductive skew theory.


A solution to the collective action problem in between-group conflict with within-group inequality
• Sergey Gavrilets & Laura Fortunato

Nature Communications 5, Article number: 3526 http://dx.doi.org/10.1038/ncomms4526 


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Collaboration Match: connect with the right non-profit

Collaboration Match: connect with the right non-profit | networks and network weaving | Scoop.it

Click here to edit the title

june holley's insight:

Interesting new platform for matching interests. 

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Simon Terry

Simon Terry | networks and network weaving | Scoop.it

Some 


Via Beth Kanter
june holley's insight:

This blog is full of interesting thinking.

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Beth Kanter's curator insight, April 1, 8:48 PM

Very thoughtful posts on Networked Mindsets

Rescooped by june holley from Creativity & Innovation
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The Enterprise Technologies To Watch In 2014

The Enterprise Technologies To Watch In 2014 | networks and network weaving | Scoop.it

A next-generation enterprise describes an organization that is proactively moving into the present by changing how they assimilate, architect, apply, and maintain their technology solutions.


The purpose: Updating and transforming their processes, structures, and business models to effectively align with and work natively in today’s networked, open, and participative digital economy.


Via Kenneth Mikkelsen, Paul Hobcraft, Emeric Nectoux
june holley's insight:

How many of these are you familiar with?

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Emeric Nectoux's curator insight, April 4, 12:25 AM

What are the most promising emerging enterprise technologies that are reaching a stage of must-adopt this year?


To answer that question, Dion Hinchcliffe has to look at the needs of what he called the next-generation enterprise (NGE):

"A next-generation enterprise describes an organization that is proactively moving into the present by changing how they assimilate, architect, apply, and maintain their technology solutions. The purpose: Updating and transforming their processes, structures, and business models to effectively align with and work natively in today’s networked, open, and participative digital economy. While that may be a mouthful, it also accurately describes what most organizations must do to ultimately avoid disruption in the marketplace as technology increasingly defines how our businesses engage with and provide value to the world."

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Complexity Explorer

Complexity Explorer | networks and network weaving | Scoop.it
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▶ Community Building Workshop with Symphonia - YouTube

▶ Community Building Workshop with Symphonia - YouTube | networks and network weaving | Scoop.it
Symphonia working together with World renowned community builder, Peter Block, offer the possibility to South Africans, a process in which communities are bu...
june holley's insight:

Lots of process ideas here.

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Can We Create a Network of 100 Sharing Cities by 2015?

Can We Create a Network of 100 Sharing Cities by 2015? | networks and network weaving | Scoop.it
Fifty cities around the world began mapping their shared resources in October and November during Shareable's worldwide Map Jam. This is just the beginning of the Sharing Cities Network - an ambitious project to create one hundred sharing cities by 2015.
june holley's insight:

Networks move meta! 


The Sharing Cities Network will scale up and replicate successful sharing models by:

  • increasing collaboration between sharing projects
  • spreading best practices among members
  • catalyzing new sharing projects
  • ultimately, creating complete sharing cities.
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Which social media network type is your topic? Which did you want it to be?

Which social media network type is your topic?  Which did you want it to be? | networks and network weaving | Scoop.it
There are at least six different types of social media network structures present in systems like Twitter and other services in which people are able to reply to one another. Each of the six patter...
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Rescooped by june holley from Culture Change
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Amazon.com: Flex: The New Playbook for Managing Across Differences eBook: Jane Hyun, Audrey S. Lee: Kindle Store

Flex: The New Playbook for Managing Across Differences - Kindle edition by Jane Hyun, Audrey S. Lee. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Flex: The New Playbook for Managing Across Differences.

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Liz Rykert's curator insight, April 11, 11:46 AM

Looks like an interesting new resource for culture change strategists and people working in new distributed systems. Adding to my reading list!

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Improve Decision-Making With Help From the Crowd

Improve Decision-Making With Help From the Crowd | networks and network weaving | Scoop.it
Most decisions in organizations are made by escalating them up the management hierarchy — and it's usually the highest paid person in the room's opinion (“HIPPO”) that prevails. The HIPPO model of decision-making will likely…
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Rescooped by june holley from Innovation & Creativity
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Flat Organisations Innovate More | Culture and Innovation

Flat Organisations Innovate More | Culture and Innovation | networks and network weaving | Scoop.it
The culture in our firms has a big influence on how innovative we are. Two ways to change the culture are to go with a flatter organisational hierarchy, and to examine the assumptions that underlie...

Via Anne Leong
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Claude Emond's curator insight, April 5, 8:13 AM

Here goes the pyramid ! 

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The Simple Rules of Social Contagion

It is commonly believed that information spreads between individuals like a pathogen, with each exposure by an informed friend potentially resulting in a naive individual becoming infected. However, empirical studies of social media suggest that individual response to repeated exposure to information is far more complex. As a proxy for intervention experiments, we compare user responses to multiple exposures on two different social media sites, Twitter and Digg. We show that the position of exposing messages on the user-interface strongly affects social contagion. Accounting for this visibility significantly simplifies the dynamics of social contagion. The likelihood an individual will spread information increases monotonically with exposure, while explicit feedback about how many friends have previously spread it increases the likelihood of a response. We provide a framework for unifying information visibility, divided attention, and explicit social feedback to predict the temporal dynamics of user behavior.


The Simple Rules of Social Contagion
Nathan O. Hodas & Kristina Lerman

Scientific Reports 4, Article number: 4343 http://dx.doi.org/10.1038/srep04343


Via Shaolin Tan, NESS, Complexity Digest
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Rescooped by june holley from Talks
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From Crystal Ball to Magic Wand: The New World Order in Times of Digital Revolution

From Crystal Ball to Magic Wand: The New World Order in Times of Digital Revolution.

Dirk Helbing, ETH Zurich.

Talk delivered via skype on March 24, 2014, to the AAAI workshop on THE INTERSECTION OF ROBUST INTELLIGENCE AND TRUST IN AUTONOMOUS SYSTEMS


We need another Apollo project, but this time focusing on our Earth. I am ready for this, are you?

Please watch this movie to the end.
The solution to our world's problems is different from what many strategic thinkers believed.


https://www.youtube.com/watch?v=AErRh_yDr-Q


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Eli Levine's curator insight, April 2, 10:07 PM

I'm not perfect, but I'd say I've done a reasonably good job at predicting these things happening.

 

You have economic pinches, combined with aspirations towards ideals, of course you're going to have Arab Springs!  Furthermore, you have governments that are not following along according to the newly expressed needs of the people, you're more likely to get unrest, violence and increase the POTENTIAL for overthrow of your whole system of governance and economics (speaking, of course, with regards to Egypt especially).  Better to improve your odds and adapt yourself to the new normal of the society's needs (which are fairly consistent throughout time, space and culture).

 

What on Earth are our current policy-makers doing by persisting with the overly-cozy relationship with the private elite and their philosophies over the actual, presented needs of the general public?  Where is their more accurate view of humanity, themselves and the various needs and functions of humanity?

 

Seriously?

And I'm the one on the outside.

 

Think about it.

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Followers Are Not Enough: Beyond Structural Communities in Online Social Networks

Community detection in online social networks is typically based on the analysis of the explicit connections between users, such as "friends" on Facebook and "followers" on Twitter. But online users often have hundreds or even thousands of such connections, and many of these connections do not correspond to real friendships or more generally to accounts that users interact with. We claim that community detection in online social networks should be question-oriented and rely on additional information beyond the simple structure of the network. The concept of 'community' is very general, and different questions such as "who do we interact with?" and "with whom do we share similar interests?" can lead to the discovery of different social groups. In this paper we focus on three types of communities beyond structural communities: activity-based, topic-based, and interaction-based. We analyze a Twitter dataset using three different weightings of the structural network meant to highlight these three community types, and then infer the communities associated with these weightings. We show that the communities obtained in the three weighted cases are highly different from each other, and from the communities obtained by considering only the unweighted structural network. Our results confirm that asking a precise question is an unavoidable first step in community detection in online social networks, and that different questions can lead to different insights into the network under study.


Followers Are Not Enough: Beyond Structural Communities in Online Social Networks
David Darmon, Elisa Omodei, Joshua Garland

http://arxiv.org/abs/1404.0300


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Rescooped by june holley from Non-profit Networks + Collaboration
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Our Healthy Alliance

Our Healthy Alliance | networks and network weaving | Scoop.it

Via Ari Sahagún
june holley's insight:

An assessment tool for alliances... we need something like this for networks!

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Ari Sahagún's curator insight, April 1, 8:48 PM

Assessment tool for alliances...how cool!

Olivia Millard's curator insight, April 5, 11:45 AM

An online partnership relationship assessment tool!

Rescooped by june holley from Future of Work
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A Journey of Discovery with Don Tapscott

A Journey of Discovery with Don Tapscott | networks and network weaving | Scoop.it

One of the world's leading authorities on the digital revolution, Don Tapscott, shares the vital qualities and characteristics of our digitally connected world. He will explain how the power of networks will radically transform our ability to solve global challenges, the way states are governed and how the next generation will live and work in the future. You are invited to learn from his personal journey of profound discovery.


Via Stowe Boyd
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Noise in biology

Noise permeates biology on all levels, from the most basic molecular, sub-cellular processes to the dynamics of tissues, organs, organisms and populations. The functional roles of noise in biological processes can vary greatly. Along with standard, entropy-increasing effects of producing random mutations, diversifying phenotypes in isogenic populations, limiting information capacity of signaling relays, it occasionally plays more surprising constructive roles by accelerating the pace of evolution, providing selective advantage in dynamic environments, enhancing intracellular transport of biomolecules and increasing information capacity of signaling pathways. This short review covers the recent progress in understanding mechanisms and effects of fluctuations in biological systems of different scales and the basic approaches to their mathematical modeling.


Lev S Tsimring 2014 Rep. Prog. Phys. 77 026601
http://dx.doi.org/10.1088/0034-4885/77/2/026601


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The French Incubators Network

The French Incubators Network | networks and network weaving | Scoop.it
The French Incubators network: startups mapping, venture, social network connections
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Nine Web-Accessible Links to Films on the Positive Deviance Approach

Here are resources to help those interested in the positive deviance (PD) approach to social, organisational, and individual behaviour change. The PD approach is premised on the belief that, in every community, there are certain individuals or groups whose uncommon behaviours and strategies enable them to find better solutions to problems than their peers, while having access to the same resources and often facing more daunting challenges.
june holley's insight:

Great concept - important for network weaving.

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