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Hi ha moltes Societats del Coneixement possibles. Aquí apostem per una d’oberta i lliure.

Anàlisi bibliometric amb anàlisi de xarxes socials

Un amic ha postejat a la llista REDES aquesta referència sobre un article que analitza els indicadors de reputació científica.

Leydesdorff, Loet (2008). “How are new citation-based journal indicators adding to the bibliometric toolbox?”

Scimago ,que surt a l’article, és un grup de recerca espanyol molt bo, que utilitza l’ARS ( sobre coautories, citacions) per a estudiar la producció científica mundial, a partir d’aplicar algoritmes d’anàlisi de xarxes al corpus científic. Una metodologia ja classica en l’anàlisi bibliogràfica.

Filed under: SNA - Social Network Anàlisis, , , – Congrès més que interessant.

18th International World Wide Web Conference
April 20 – 24, 2009, Madrid, Spain

WWW2009 seeks original papers describing research in all areas of the Web.
Papers may be submitted to the following tracks:

* Data Mining
* Internet Monetization
* Performance and Scalability
* Rich Media
* Search
* Security and Privacy
* Semantic / Data Web
* Social Networks and Web 2.0
* User Interfaces and Mobile Web
* Web Engineering
* XML and Web Data

In addition, the conference solicits original research papers to the following alternate tracks:

* Industrial Practice and Experience
* WWW in Ibero-America

Refereed papers due:  November 3, 2008 (11:59 pm Hawaii Time; no extensions will be granted)
Acceptance Notification:   January 20, 2009
Conference dates:  April 20 – 24, 2009


Workshops: October 10th, 2008
Tutorials: November 30th, 2008
Panels: December 21st, 2008
Posters: January 11th, 2009
Developers track: February 2nd, 2009

Submissions should present original reports of substantive new work and can be up to 10 pages in length. Papers should properly place the work within the field, cite related work, and clearly indicate the innovative aspects of the work and its contribution to the field. We will not accept any paper which, at the time of submission, is under review for or has already been published or accepted for publication in a journal or another conference.

All papers will be peer-reviewed by at least three reviewers from an International Program Committee. Accepted papers will appear in online proceedings published by the ACM Digital Library and the conference’s web site. The Program Committee will select a small number of excellent papers for fast-track journal publication in the ACM Transactions on the Web.

Authors of accepted papers will retain proprietary rights to their work, but will be required to sign a copyright release form to IW3C2. Detailed formatting and submission requirements are available at

The WWW2009 program will also include Tutorials and Workshops, Panels, a W3C track, a Developers track, Posters, and Exhibitions. See for details.

General Chairs:
* Juan Quemada, Universidad Politecnica de Madrid (Spain)
* Gonzalo Leon, Universidad Politecnica de Madrid (Spain)

Program Chairs
* Yoelle Maarek, Google Inc. (Israel)
* Wolfgang Nejdl, L3S and Hannover University (Germany)

Local Organizing Committee Chair
* Joan Vinyes, Universidad Politecnica de Madrid (Spain)

Filed under: DataMining i Datawarehouse, Economia de xarxes, emarketing, SNA - Social Network Anàlisis, ,

Valor d’una xarxa: la llei de Metcalfe

Una de les ocupacions principals d’aquesta web seran les xarxes en general, i en particular topics/tags com:

Per començar, aqui tenim una important llei de les xarxes, formulada per un dels creadors de tecnologia base per a Internet, en Bob Metcalf, copiada de Wikipedia:

Metcalfe’s law states that the value of a telecommunications network is proportional to the square of the number of users of the system (n²). First formulated by Robert Metcalfe in regard to Ethernet, Metcalfe’s law explains many of the network effects of communication technologies and networks such as the Internet, social networking, and the World Wide Web. It is related to the fact that the number of unique connections in a network of a number of nodes (n) can be expressed mathematically as n(n-1)/2, which is proportional to n² asymptotically.

The law has often been illustrated using the example of fax machines: a single fax machine is useless, but the value of every fax machine increases with the total number of fax machines in the network, because the total number of people with whom each user may send and receive documents increases.

Metcalfe’s law is more of a heuristic or metaphor than an iron-clad empirical rule. In addition to the difficulty of quantifying the “value” of a network, the mathematical justification measures only the potential number of contacts, i.e., the technological side of a network. However the social utility of a network depends upon the number of nodes in contact. For instance, if Chinese and non-Chinese users don’t understand each other, the utility of a network of users that speak the other language is at zero, and the law has to be calculated for the two networks separately.


Filed under: Networks, ,

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