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tsuomela : networks   124

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"Research4Impact connects people from the academic, nonprofit, and governance spaces who are interested in collaborating with each other. Collaborations answer important questions, increase the effectiveness of policies and programs, and ultimately improve our quality of life."
networks  academic  non-profit  research 
march 2017 by tsuomela
vis.js - A dynamic, browser based visualization library.
"A dynamic, browser based visualization library. The library is designed to be easy to use, to handle large amounts of dynamic data, and to enable manipulation of and interaction with the data. The library consists of the components DataSet, Timeline, Network, Graph2d and Graph3d."
network-analysis  networks  visualization  software  web  javascript  library 
may 2016 by tsuomela
Home | Academic Preservation Trust
"The Academic Preservation Trust (APTrust) is committed to the creation and management of a sustainable environment for digital preservation. APTrust’s aggregated repository will help solve one of the greatest challenges facing research libraries and their parent institutions – preventing the permanent loss of scholarship and cultural records being produced today. APTrust offers new levels of confidence in the preservation of digital content, up to and including permanent deposit in the Digital Preservation Network (DPN) through our systems.  From the start, an institution that places digital content in APTrust will be able to use our capabilities to recover that content in the event it is lost from the local institutional environment. Disaster recovery is only the first in a list of services APTrust is already developing or considering, all in collaboration with our member community.  Such future services may include format migration, alert systems, access to APTrust-stored content (when that is the desire of the owning institution), and aggregated discovery. As our member institutions combine their expertise and resources to accomplish a common mission, together they will develop scalable solutions, new functionalities, and enriched services that will be offered broadly through APTrust."
digital  preservation  archives  libraries  networks  scholarly-communication 
september 2015 by tsuomela
SylvaDB - Welcome to The Sylva Project
"Sylva ["silva", a book to organize knowledge during the Renaissance] is an easy-to-use, flexible, and scalable database management system that helps you collect, collaborate, visualize and query large data sets. In Sylva, all your data is connected using a graph, and you will see the connections all the way through. "
software  database  networks  tools  digital-humanities 
june 2015 by tsuomela
Web Science Trust | The Web Science Trust
"The Web Science Trust (WST) is a charitable body with the aim of supporting the global development of Web Science through a network of world class laboratories known as WSTnet. It is hosted by the University of Southampton."
web-archive  internet  science  networks  archive  research  collaboration 
january 2015 by tsuomela
A network framework of cultural history
"The emergent processes driving cultural history are a product of complex interactions among large numbers of individuals, determined by difficult-to-quantify historical conditions. To characterize these processes, we have reconstructed aggregate intellectual mobility over two millennia through the birth and death locations of more than 150,000 notable individuals. The tools of network and complexity theory were then used to identify characteristic statistical patterns and determine the cultural and historical relevance of deviations. The resulting network of locations provides a macroscopic perspective of cultural history, which helps us to retrace cultural narratives of Europe and North America using large-scale visualization and quantitative dynamical tools and to derive historical trends of cultural centers beyond the scope of specific events or narrow time intervals."
history  culture  visualization  networks  geography  emergence 
august 2014 by tsuomela
The Hidden Geometry of Complex, Network-Driven Contagion Phenomena
The global spread of epidemics, rumors, opinions, and innovations are complex, network-driven dynamic processes. The combined multiscale nature and intrinsic heterogeneity of the underlying networks make it difficult to develop an intuitive understanding of these processes, to distinguish relevant from peripheral factors, to predict their time course, and to locate their origin. However, we show that complex spatiotemporal patterns can be reduced to surprisingly simple, homogeneous wave propagation patterns, if conventional geographic distance is replaced by a probabilistically motivated effective distance. In the context of global, air-traffic–mediated epidemics, we show that effective distance reliably predicts disease arrival times. Even if epidemiological parameters are unknown, the method can still deliver relative arrival times. The approach can also identify the spatial origin of spreading processes and successfully be applied to data of the worldwide 2009 H1N1 influenza pandemic and 2003 SARS epidemic.
networks  epidemiology  epidemics  geography 
december 2013 by tsuomela
Social isolation, loneliness, and all-cause mortality in older men and women
"Both social isolation and loneliness are associated with increased mortality, but it is uncertain whether their effects are independent or whether loneliness represents the emotional pathway through which social isolation impairs health. We therefore assessed the extent to which the association between social isolation and mortality is mediated by loneliness. W"
loneliness  isolation  social  connection  networks  psychology  mortality  health 
march 2013 by tsuomela
Life in a Networked Age - Global Guerrillas
"In the last thirty years, we've seen a shift in the technological substrate.  This new susbstrate is increasingly a family of technologies related to information networks. As this new substrate begins to take control, we're going to need new management forms.  Both bureaucratic and market systems are proving insuffient solutions to the challenges of a networked age."
technology  organization  networks 
march 2013 by tsuomela
The Leviathan Model
"We propose an opinion dynamics model that combines processes of vanity and opinion propagation. The interactions take place between randomly chosen pairs. During an interaction, the agents propagate their opinions about themselves and about other people they know. Moreover, each individual is subject to vanity: if her interlocutor seems to value her highly, then she increases her opinion about this interlocutor. On the contrary she tends to decrease her opinion about those who seem to undervalue her. The combination of these dynamics with the hypothesis that the opinion propagation is more efficient when coming from highly valued individuals, leads to different patterns when varying the parameters. For instance, for some parameters the positive opinion links between individuals generate a small world network. In one of the patterns, absolute dominance of one agent alternates with a state of generalised distrust, where all agents have a very low opinion of all the others (including themselves). We provide some explanations of the mechanisms behind these emergent behaviors and finally propose a discussion about their interest. "
agent-based-model  complexity  model  social  opinion  self-perception  networks 
february 2013 by tsuomela
UnderstandingSociety: Marketing Wittgenstein
"Who made Wittgenstein a great philosopher?  Why is the eccentric Austrian now regarded as one of the twentieth century's greatest philosophers? What conjunction of events in his life history and the world of philosophy in the early twentieth century led to this accumulating recognition and respect?"
philosophy  history  analytic-philosophy  reputation  social-construction  networks 
january 2013 by tsuomela
Experiments in Motion Research Seminar, Fall 2012 |
"Networks and mobility have always been linked. So long as there have been people, individuals have been driven to connect with each other to communicate thoughts and to exchange things. Transportation and communication are two reflections of the need to overcome the distance between us. The pre-modern city is the product of the first great intensification of mobility, produced by the explosion in trade and knowledge made possible by the invention of writing, the wheel, and the sailboat in Mesopotamia. With the development of modern postal systems, the telegraph, and the telephone, as well as the invention of trains, steamships, and automobiles in the nineteenth century, the city intensified to an entirely different energy level, producing the modern metropolis.

After a century of relatively stable intensification, we are now again experiencing a phase-shift as the Internet and mobile telecommunications devices are reframing mobility. The last two decades have sent us hurtling headlong into a new age in which our lives, more than ever, trace trajectories over networks. We live in a network culture that we urgently need to understand."
syllabi  networks  history 
september 2012 by tsuomela
NodeXL: Network Overview, Discovery and Exploration for Excel
"NodeXL is a free, open-source template for Microsoft® Excel® 2007 and 2010 that makes it easy to explore network graphs. "
network-analysis  networks  microsoft  software  visualization  analysis  graphics 
august 2012 by tsuomela
The Abundance Builders | World Future Society
A techno-optimist portrait of the future that still thinks the internet of things, personal fabrication, medicine-on-a-chip, and nanotechnology will 'build abundance for all.'
future  futurism  optimism  nanotechnology  medicine  fabrication  networks  abundance 
july 2012 by tsuomela
[1207.2743] The evolutionary origins of modularity
"A central biological question is how natural organisms are so evolvable (capable of quickly adapting to new environments). A key driver of evolvability is the widespread modularity of biological networks--their organization as functional, sparsely connected subunits--but there is no consensus regarding why modularity itself evolved. While most hypotheses assume indirect selection for evolvability, here we demonstrate that the ubiquitous, direct selection pressure to reduce the cost of connections between network nodes causes the emergence of modular networks. Experiments with selection pressures to maximize network performance and minimize connection costs yield networks that are significantly more modular and more evolvable than control experiments that only select for performance. These results will catalyze research in numerous disciplines, including neuroscience, genetics and harnessing evolution for engineering purposes. "
evolution  modularity  networks  connection  biology  nature 
july 2012 by tsuomela
Network Interventions - Science Magazine 6 July 2012
The term “network interventions” describes the process of using social network data to accelerate behavior change or improve organizational performance. In this Review, four strategies for network interventions are described, each of which has multiple tactical alternatives. Many of these tactics can incorporate different mathematical algorithms. Consequently, researchers have many intervention choices at their disposal. Selecting the appropriate network intervention depends on the availability and character of network data, perceived characteristics of the behavior, its existing prevalence, and the social context of the program.
networks  network-analysis  intervention  research 
july 2012 by tsuomela
In networks, cooperation trumps collaboration | Harold Jarche
"In networks, cooperation trumps collaboration. Collaboration happens around some kind of plan or structure, while cooperation presumes the freedom of individuals to join and participate."
networks  organizations  knowledge-management  cooperation  collaboration 
june 2012 by tsuomela
The World is Small and Life is Long
"I am not certain whether I like or dislike this emerging world. I think I am leaning towards dislike. The slogan, the world is small and life is long describes a tense and anxious world of constant social shadow-boxing. One where you must always be on, socially. A world where burning bridges is more dangerous, and open conflict becomes ever costlier, leading to less dissent and more stupidity.

It is a situation of false harmony. One where peace is less an indicator of increasing empathy and human connection, and more an indicator of increasing wariness. You never know which world your world will collide with next, with what consequences. You never know what missed opportunity or threat could decisively impact your life."
facebook  social-media  networks  social-networking  behavior  interaction  psychology  social-psychology 
april 2012 by tsuomela
PopTech : Duncan Watts - Social contagion: What do we really know?
"Again, we don’t know for sure, but we suspect that the analogy with biological disease is badly flawed. For example, whereas it is probably true that most people are susceptible to HIV, our susceptibility to any particular idea, product, musical artists, etc. varies tremendously, depending on our tastes, backgrounds, and circumstances. Unlike for influenza, to which you’re either exposed or not exposed, even the ideas you do encounter have to compete for attention with everything else that you’re exposed to. And unlike models of disease, which assume that disease spreads exclusively from person to person, information can be disseminated by the media and advertising as well as by word of mouth.

All of these differences, along with many others, could dramatically alter the prospects for social epidemics, as well as introduce other mechanisms entirely by which social change can come about, yet models of social influence reflect very little of this added complexity"
social-contagion  ideas  networks  influence  persuasion  society  epidemics  via:cshalizi 
march 2012 by tsuomela
[1106.0296] The Emergence of Leadership in Social Networks
"We study a networked version of the minority game in which agents can choose to follow the choices made by a neighbouring agent in a social network. We show that for a wide variety of networks a leadership structure always emerges, with most agents following the choice made by a few agents. We find a suitable parameterisation which highlights the universal aspects of the behaviour and which also indicates where results depend on the type of social network. "
social-networks  networks  game-theory  leadership  agents  social-science  choice 
august 2011 by tsuomela
Omniorthogonal: How to avoid the singularity
The cure for singulatarianism lies is in the direction of sociology and network thinking in general. Monotheism wants to collapse the universe's locus of control into a single transcendent point
singularity  commentary  religion  belief  networks  sociology  ethics 
august 2011 by tsuomela
Science 3.0 | Home
"Science 3.0 combines the hypothesis based inquiry of laboratory science with the methods of social science research to understand and improve the use of new human networks made possible by today’s digital connectivity. This website is a community where those interested in the advancement of research can share ideas, tools and build connections."
science  communication  future  networks  social-science 
august 2011 by tsuomela
New INC Research Network: Unlike Us – Understanding Social Media Monopolies and their Alternatives :: Institute of Network Cultures Blog
"The aim of this proposal is to establish a research network of artists, designers, scholars, activists and programmers who work on 'alternatives in social media'. Through workshops, conferences, online dialogues and publications, Unlike Us intends to both analyze the economic and cultural aspects of dominant social media platforms and to propagate the further development and proliferation of alternative, decentralized social media software."
research  network  networks  culture  project  academic-programs 
july 2011 by tsuomela
Human Brain Limits Twitter Friends To 150 - Technology Review
"It turns out that when people start tweeting, their number of friends increases until they become overwhelmed. Beyond that saturation point, the conversations with less important contacts start to become less frequent and the tweeters begin to concentrate on the people they have the strongest links with.

So what is the saturation point? Or, in other words, how many people can tweeters maintain contact with before they get overwhelmed? The answer is between 100 and 200, just as Dunbar predicts. "
communication  networks  dunbar-number  social  behavior  sociology  neurology  brain  evolution  twitter  social-media 
may 2011 by tsuomela
UnderstandingSociety: Social networks as aggregators
"This passage emphasizes quite a few themes that have been important throughout UnderstandingSociety -- the heterogeneity of social phenomena, the difficulty of formulating a clear understanding of social ontology, and the challenge of representing the processes of aggregation through which individual social actions contribute to mid- and large-scale social outcomes.

So how do the analytical resources of network theory contribute to a better understanding of the ways that actions aggregate into outcomes?"
sociology  social  theory  objects  network-analysis  networks  scale 
april 2011 by tsuomela
Scientific Network | ResearchGate
"ResearchGate is the professional network for scientists"
social-media  networks  science 
april 2011 by tsuomela
Blogs and Bullets: Breaking Down Social Media - Whimsley
Differentiates some of the categories that connect social media and political change.
social-media  networks  politics  vocabulary  definition  revolution  change 
april 2011 by tsuomela
Bruno Latour, Some Experiments in Art and Politics / Journal / e-flux
"So how can we have both networks and spheres? How do we avoid the pitfalls of a globalization that has no real globe in which to place everything? In a work presented at the Venice Biennale in 2009, Tomas Saraceno provided a great, and no doubt unintended, metaphor for social theory. In an entire room inside the Biennale’s main pavilion, Galaxies Forming along Filaments, Like Droplets along the Strands of a Spider’s Web (2008) consisted of carefully mounted elastic connectors that produced the shape of networks and spheres."
art  networks  philosophy  sociology  model  visualization  commons 
march 2011 by tsuomela
A clash of networks and institutions | 2.0.2 |
"The shift of balance from the institutional society to the network society will topple dictators, bring down governments, occasionally create terror and mayhem, create economic risk and opportunity, and quickly eliminate some traditional civic and state institutions. Things will seem stable one minute and unstable the next. Sometimes institutional power will out for good or bad (as depressingly seems to be the case in Libya- not least because of the weakness of international institutions.) Often though, institutions and their leaders will be crushed by the power of networks. It creates new possibilities alongside new risks. Our success as a movement is determined by our ability to build enduring institutions of change out of networks of outrage. Wisconsin, Egypt, Tunisia, London, have all found themselves caught in this shift. Social media is only the very superficial surface of this"
networks  social-media  protests  change  revolution 
march 2011 by tsuomela
Tunisia, Egypt, Miami: The Importance of Internet Choke Points - Andrew Blum - Technology - The Atlantic
"Terremark's building in Miami is the physical meeting point for more than 160 networks from around the world. They meet there because of the building's excellent security, its redundant power systems, and its thick concrete walls, designed to survive a category 5 hurricane. But above all, they meet there because the building is "carrier-neutral." It's a Switzerland of the Internet, an unallied territory where competing networks can connect to each other. Terremark doesn't have a dog in the fight. Or at least it didn't."
internet  infrastructure  geography  networks  network  monopoly  vulnerability  politics  regulation  design 
march 2011 by tsuomela
WikiLeaks Lessons: The Party of We — Already in Control
"What's most important is the tipping point, spawned not by Assange but by a new body politic — a new party of individuals bonded by commonality of interest not defined by national or geographic boundaries. The Party of We.

In response to the attacks on Wikileaks, this virtual We Party, comprised of citizens of the world, unleashed an unprecedented — and united — attack on parts of the infrastructure that transact payments and sustain eCommerce and for a brief moment shut critical parts of it down.

This was unprecedented not because it hasn't been tried before (even with some success), but because its success, however brief the moment may have been, was only reversed by those who started it and who had a change of heart. Furthermore, it was novel in its motivation not to hack a system or engage in fraud or greed, but rather in support of a cause — a belief in the idea and purity of unencumbered speech."
politics  internet  wikileaks  government  revolution  centralization  censorship  control  networks  power 
february 2011 by tsuomela
Internet is easy prey for governments -
"For all that the revolution in Egypt tells us about the power of networked media to promote bottom-up change, it even more starkly reveals the limits of our internet tools and the ease with which those holding power can take them away.

Yes, services such as Twitter and Facebook give activists the means to organize as never before. But the more dependent on them we become, the more subservient we are to the corporations and governments that control them."
politics  networks  control  revolution  power  centralization  censorship  government 
february 2011 by tsuomela
How wise are crowds?
Fortunately, in a paper to be published in the Review of Economic Studies, researchers from MIT’s Departments of Economics and Electrical Engineering and Computer Science have demonstrated that, as networks of people grow larger, they’ll usually tend to converge on an accurate understanding of information distributed among them, even if individual members of the network can observe only their nearby neighbors. A few opinionated people with large audiences can slow that convergence, but in the long run, they’re unlikely to stop it.
collective-intelligence  crowdsourcing  modeling  game-theory  simulation  intelligence  wisdom  networks  collective 
november 2010 by tsuomela
Network Culture Fall 2010 |
network culture fall 2010
My latest syllabus for the Network Culture course as I am teaching it this term at Columbia.

Topics to be addressed include network theory, changing concepts of time and space, the rise of networked publics, contemporary poetics, new forms of subjectivity, and methods of control. Throughout, we will make connections between architecture and this insurgent condition.
syllabi  network  networks  culture 
november 2010 by tsuomela
Book Review: 'Where Good Ideas Come From' by Steven Johnson -
So what's the philosopher's stone for creativity, the elixir for making innovative places?

A "series of shared properties and patterns recur again and again in unusually fertile environments," Johnson argues, be they companies, cities or coral reefs. Good ideas, whether expressed as patents or paintings or DNA, flourish in liquid networks stocked with old ideas and physical resources that can be cannibalized, recycled and repurposed. Liquid networks give creative groups the chance to explore the "adjacent possible," the new functions or capabilities opened up by incremental innovations; discover new uses for old ideas; and explore potentially fruitful errors. Finally, they serve as a proving ground for ideas, making it easier to experiment, fail quickly and cheaply and iterate faster.
book  review  creativity  innovation  networks 
november 2010 by tsuomela
Cormode - A manifesto for modeling and measurement in social media - First Monday - 6 September 2010
Online social networks (OSNs) have been the subject of a great deal of study in recent years. The majority of this study has used simple models, such as node–and–edge graphs, to describe the data. In this paper, we argue that such models, which necessarily limit the structures that can be described and omit temporal information, are insufficient to describe and study OSNs. Instead, we propose that a richer class of Entity Interaction Network models should be adopted. We outline a checklist of features that can help build such a model, and apply it to three popular networks (Twitter, Facebook and YouTube) to highlight important features. We also discuss important considerations for the collection, validation and sharing of OSN data.
social-networks  social-media  network-analysis  networks  research  measurement  methods  twitter  data  social  network 
october 2010 by tsuomela
CASOS brings together computer science, dynamic network analysis and the empirical study of complex socio-technical systems. Computational and social network techniques are combined to develop a better understanding of the fundamental principles of organizing, coordinating, managing and destabilizing systems of intelligent adaptive agents (human and artificial) engaged in real tasks at the team, organizational or social level. Whether the research involves the development of metrics, theories, computer simulations, toolkits, or new data analysis techniques advances in computer science are combined with a deep understanding of the underlying cognitive, social, political, business and policy issues.
complexity  modeling  research  networks  social  analysis  network-analysis  simulation  sociology  agent-based-model  school(CarnegieMellon) 
september 2010 by tsuomela
[1008.5166] Network Archaeology: Uncovering Ancient Networks from Present-day Interactions
Often questions arise about old or extinct networks. What proteins interacted in a long-extinct ancestor species of yeast? Who were the central players in the social network 3 years ago? Our ability to answer such questions has been limited by the unavailability of past versions of networks. To overcome these limitations, we propose several algorithms for reconstructing a network's history of growth given only the network as it exists today and a generative model by which the network is believed to have evolved.
network-analysis  networks  model  mathematics  archaeology  history  influence 
september 2010 by tsuomela
Greg's Cable Map
World map of intercontinental, oceanic, internet cables.
infrastructure  internet  map  networks  oceans  telecommunications  communication 
august 2010 by tsuomela
Beyond The Echo: Reshaping Politics Through Networked Progressive Media by Tracy Van Slyke and Jessica Clark
Beyond The Echo Chamber is a book and blog dedicated to changing the national conversation about progressive media and the future of journalism itself.

Co-authored by Jessica Clark and Tracy Van Slyke, Beyond The Echo Chamber: Reshaping Politics Through Networked Progressive Media tells the story of the rise of progressive media from 2004 to today and lays out a clear, hard-hitting theory of ongoing impact.
politics  progressive  book  infrastructure  weblog-group  media  journalism  institutions  networks 
february 2010 by tsuomela
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