The intuitive tools in Gephi for applying filtering methods are one of its most useful features.
To be continued. Read more »
Source: GGN (September 2010)
In the course of chearing my way through an online class on Social Network Analysis through Coursera, my interest was drawn to Prof Adamic’s well-known political blog census from 2004, which seemed to reinforce the “Red State, Blue State” politics of division notable — with caveats — during that election season.
And it got me to thinking … and not least because strategic consultancies like Blue State Digital and Movements.org have made it a goal to reproduce their strategic methods for parties outside the United States. Brazliian marketers on the left have done the same, working for members of the Foro de S. Paulo. The recent Honduran election was masterminded by a PT strategist, for example.
The paper actuallly raises a lot of interesting questions, such as what constitutes an “A-list” political blog, the counting of negative citation ties — “Rush Limbaugh is an ass” — and the liberal use of “echo chamber” tactics.
In the last Brazilian presidential election, the opposition coalition loudly decrying the use of digital “dirty tricks” was itself a paying customer of a broad-based, professionally managed volunteerism campaign aimed at motivating youth, modeled after a type of strategy promoted, for example, by the Association of Youth Movements — which no longer exists, it seems.
In the meantime, how to set up a similar analysis using the tools at hand: a fairly large database of blogs and sites from some Web crawling I have been doing with WIRE, combined with rudimentary analysis and drawing skills I have been studying on my own? Read more »
Above, “natural clusters” — a term that needs a definition — in the network of Demo Day 21212, held in October and intended to get state, private and foreign venture capitalists together with Brazilian startups, both academic and non-academic. Along with advertorial-ridden press with conflict of interest problems to promote the event.
Therefore, we should check to see if the categories can be sorted by algorithm into a more or less thematically unified overview, as a precursor to the selection of subnets.
A simple Fruchterman with a heat map provides a sample of the universe of entities involved.
The question is how to find communities performing their distinct functions in this complex but highly coordinated process.
RIO – Militias control 454 of Rio de Janeiro’s 1,001 shantytowns, according to a survey by anthropologist Alba Zaluar and a team from the Institute of Social and Political Studies (IESP) of Rio de Janeiro State University and Christovam Barcellos, coordinator of the ICICT institute at Fiocruz. This number represents 45% of all shantytowns in Rio.
The study also shows that 370 communities, or 37% of all slum zones, are still controlled by the drug trade. Police Pacification Units (UPP) are installed in 174, or 18%, of the areas. All of the results of the study, entitled “Urban health — homicides in the slums of Rio,” will be presented on Wednesday at a seminar on the UPP and how to transform it into a form of “proximity policing.”
In recent days I have been cheating my way shamelessly through the course in Social Network Analysis @ Coursera put together by Lada Adamic.
And I continue my own modest mappings of items of interest. (Crawling such “newsstand” sites as Periodismo.com and Journalist’s Toolbox is an effective way of obtaining grist for the mill, for example, and the databases I have created here were seeded by such sources as Arts & Letters Daily and the membership roles of the World Association of Newspaper.)
Among other things, I was startled to find this blog listed among a complex of ideologically and stylistically disparate periodicals that have have lately been forming business associations — from Mexico’s Jornada and the Chilean and Argentine Clarins to Brazil’s O Globo, IstoE and others.
Below, the Toolbox as a component in an analysis of ABONG (above), the Association of Brazilian NGOs — itself a link-heavy yellow pages to the philanthropical sector.
Some of these overlaps, I believe, are explained by common, but not disclosed or accentuated, adherence to the advice of a handful of world-class media consultancies, most especially Innovation-Media Consulting. How else could El Pais and Liberation present news faces with so many design similarities?
I have been doing some more thinking about how exploratory SNA might be applied to what we journalists call “beat-building” — the construction of readily assessible rosters, league charts and other updated information on sectors or topics that interest us, with statistics and structural analysis to help focus our attention where it is needed.
Consider the network fragment shown above. From repeated mulling over the actors in this scenario, I immediately recognize portions of the network of the Instituto Millenium, a large and influential Cato-style NGO — it has shared personnel with Cato in the past.
(Obviously, googleapis is just an artifact of the underlying network — a girder left bare by some post-modern architect. I tend to refer to these nodes as “social code” and look to filter them out, but am out of ideas on how to do it or even whether to do it, and when. )
Otherwise, you find yourself hypnotised by a graph consisting mainly of star networks.)
And now, consider another angle. A new — to me — venture capital player called 21212 is mentioned often across several different views of the network in close connection with (1) government-funded venture capital incubators and their policy wornks, such as FINEP, (2) net libertarian innovation policy wonks working to influence policy in various institutions, and not forgetting (3) the mainstream press, which often works closely with class (2). You could call these the evangelicals.
And these antipodean apostles do not waver in the face of frank advertorialism.
Topic: [Pajek] merging two datasets.
Wouter de Nooy, co-author of the authoritative textbook on the social network analysis software package Pajek, answers a question I have had in mind myself.
Elisa, Because the two networks that you want to merge have different sets of vertices, you cannot use the Union of Lines and Intersection commands. Use the Union of Vertices to create a network with all vertices and lines from both networks. Now two vertices may refer to the same person or organization. Then use the Net>Partition>Vertex [Labels] command to obtain a partition with a class for each set of vertices that have exactly the same label. Finally, shrink vertices within these classes to one new vertex with the Operations>Shrink Network>Partition command.I think this will do the job but the resulting network may not be recognized as a two-mode network by Pajek any longer.
Let us suppose that the sum of the sum of vertices in the two networks is 69, or 36+33 but that a certain number of these labels refer to identical nodes. Pajek computes the intersection of these partitions and creates another just to hold the vertex names.
Redundant vertices are marked with hash-tag, #, otherwise used to indicate a node is representative of a cluster or reduction.
Note that this can be applied to cases of multiple overlapping edges and can be iterated in order to discover information about a relationship from various sources at various times.
Here, I am using a network crawled by WIRE and seeded with links from Arts & Letters Daily. I have another based on the membership rolls of the World Association of Newspapers, and finally a larger (400,000 URLs) network derived from a much more thorough crawling based on the results of the previous two investigations.
An effective way to develop seeds for your crawl is to search for “newsstands” and “rosters” — systematic lists representing explicit ties — or chances to create them efficiently.
I am also beginning to be able to recognize examples of network structure, such as brokerage roles.
From a reading of the CENPEC program Web site and an analysis of the roster of Abong, the Association of Brazilian NGOs, I could see that this diagram — created in yEd — was was an important one: a cut-vertex without which the analyst loses track of the institutional context.
In the network of Brazilian labor federations, above, I found IREX in an interesting position — a classic bridging structure, in this case between the U.S. diplomatic establishment and the policy research arm of the dominant labor federation, CUT.
George Soros and Bill Gates certainly do seem to be involved in a lot of “public diplomacy” offensives.
This is interesting because among other “roster” projects, I have been working on Brazilian labor and industrial federations. (The National Industrial Confederation — CNI — has ruined things by migrating to a new URL that has yet to percolate up.)
I have also been accompanying the emergence of strategic alliances among South American dailies — Mexico’s Jornada, for example.
The so-called Brazilian “dirty blogs” are exhibiting closer coordination with the alternative press and coming into their own as a genuine alternative. The mainstreaming of Brasil 247 is an example, as is the commitment of the iG group to venture cap and innovation.
I am sorry not to have prepared a more thorough presentation.
Source: Brasil 24/7.
247 – The debut of the Prisa group’s El Pais in a Portuguese language online version provokes yet another example of the Stone Age style lobbying of the major Brazilian dailies.
Representatives of the ANJ, the National Association of Newspapers, announced a lawsuit to remove the page from the Web. The reason: the law that limits to 30% the amount of foreign capital that may be invested in domestic media companies. “We see this as a clear affront to constitutional norms,” said Ricardo Pedreira, executive director of the ANJ. “They also plan to compete for advertising, which implies they are a domestic media outlet. We are looking carefully at the issue.”