Tuesday, May 18, 2010

Review of "It’s a Network, Not an Encyclopedia: A Social Network Perspective on Wikipedia Collaboration"

This paper investigates the relationship between Wikipedia article's centrality (degree and eigenvector centrality) and articles quality, sampling 300 articles (out of 15000) from the Wikiproject Medicine, and studying a 300x1800 two-mode network (articles by editors, where nodes are articles and ties are the number of editors who contributed to each pair of articles).

The dependent variable is article's quality (on a 5-point Likert scale, assigned by the Wikipedia community), and the independent variables are degree centrality and eigenvector centrality; moreover the author considered a set of control variables, related to topic importance, popularity of articles and other measures of direct collaboration.

In general, the results indicate that articles' centrality is positively correlated to articles' quality.

Thursday, November 26, 2009

Semantic Enrichment of Memory Archives: Case Study on Jurka.net

Today I presented the first case study of the LiveMemories project: a joint work with SoNet, Opera Universitaria, Portobeseno, Cooperativa Mercurio, and Studiare a Trento.

In summary, the goal of the case study was to assess which web platforms people in Trentino would use for sharing memories, and how; and to collect memories from the local community and suggest how LiveMemories techniques can enrich them.

Our main activities in the case study were to:
  • Identify a specific community of people (in this case, localized in a specific district of Trento)
  • Test different ways in which they might share memories, both
    • Offline: interviews, events, collection of memories in a photo format
    • Online: providing web tools (Flickr, Facebook, Jurka.net)
  • and reported how they used them, and what was most successful
  • Imagine what kind of web services LM could offer to enrich memory archives
So, we chose to investigate the collection of memories, the fostering of a community, and the potential value of LiveMemories to such communities in a geographically limited case study, where the memories refer to a well defined place:
The district of San Bartolomeo


Here's the agenda of the whole day:

10.00 Welcome
Andrea Zanotti (FBK – President)
Paolo Traverso (FBK‐ Centre for Information Technology‐irst – Director)

10.15 LiveMemories Demonstration Day
Bernardo Magnini (FBK‐irst)

10.30 Demonstrator 1: Content Extraction and Content Integration on Newspaper Archives (Case Study on L’Adige and Vita Trentina)
Massimo Poesio (Uni. Trento), Luciano Serafini (FBK‐irst) and Paul Lewis (Uni. Southampton)

11.00 Break

11.30 Demonstrator 2: Semantic Enrichment of Memory Archives (Case Study on Jurka.net)
Paolo Massa (FBK‐irst) and Michela Ferron (FBK‐irst)

12.00 Invited Talk: Semantic Search and Different Visualization Models in Media Archives
Waltraud Wiedermann (Austria Press Agentur – CEO), Rüdiger Baumberger (Austria Press Agentur – Technical Director)

12.30 Invited Demonstration: Visual Media Analysis for the General Public
Michael Granitzer and Wolfgang Kienreich (Know Centre – Graz)

13.00 Buffet lunch

14.00 Demonstrator 3: Content Presentation (Case Study on Blog Stories)
Fausto Giunchiglia (UniTN)

14.30 Demonstrator 4: Searching, Navigating and Visualizing Digital Memories: Trento's Municipal Assembly case study
Marco Ronchetti (UniTN)

15.00 Conclusion
Paolo Traverso (FBK‐irst – Director)

Special Guests

Luciano Paris (SIE – CEO)
Marta DeMarchi (RTTR – President)

Wednesday, August 05, 2009

I hold my breath. Do you?

I was browsing the Internet looking for more information on continuous partial attention and how Linda Stone defines it, when I found this interesting issue of "email apnea". This post explains better what I am talking about. One day, Linda Stone realized that while checking emails, exploring the messages and thinking what to answer first, what to do next, etc., she was holding her breath.
She wondered if this could have somehow some effect on her (and I wonder it too). So she called Dr. Margaret Chesney at the National Institute of Health (NIH). In brief, Chesney explained that breath-holding and hyperventilating can affect our body's balance of oxygen, CO2, and NO.
NO is Nitric oxide, which is used by our body to fight different kinds of infections, and tumors. It is associated with learning, memory, sleeping, feeling pain, and probably depression, and it also mediates inflammations and rheumatism.

Breath-holding seems also to be related to the vagus nerv, which goes from the head to the neck, chest and abdomen, and mediates the autonomic nervous system, which is formed by the sympathetic and the parasympathetic nervous system. Now, shallow breathing, breath-holding and hyperventilating "activate" our sympathetic nervous system in a "fight or flight" response, which causes the liver to dump glucose and cholesterol into our blood, our heart rate to increase, our sense of satiety to be compromised, and our body to anticipate the physical activity that once was associated with a physical fight or flight response. Quite ironically, when our only physical activity is sitting and responding to email, we're sort of "all dressed up with nowhere to go."

Well, moral of the story: breathe!

Tuesday, July 07, 2009

Michela @UAB (Barcelona): Theory, methods and applications of social networks. Dynamic Analysis with SIENA

This was the first day here @UAB (Universitat Autònoma de Barcelona), and I feel like I have learned much more in one day than in one month on my own. Wow...
Anyway, the course is an introduction to the theory and methods of social networks and especially in dynamic analysis of social networks with SIENA, but it also includes some sessions about other software and other kinds of analysis.
Today José Luis Molina introduced social network analysis and the three main kinds of social networks: sociocentric, egocentric and personal network. The major field here at UAB is on ego and personal networks.
In the morning we analysed a sociocentric network with UCINET and visualized it with Netdraw, and in the afternoon we created our own personal network through Egonet, a software that allows you to create and manage questionnaires with different "name generators" and many other characteristics of 'ego' and 'alters'.
Tomorrow, with Jürgen Lerner, we will see Visone, a software for network visualization.
I have already received some useful suggestions concerning the research I am carrying on with my group at FBK, and I am sure I will learn many other things by the end of the week, especially with regard to dynamic network analysis, which will be explained through SIENA by William J. Burk, and which (I discovered) is the field of study of one of the participant to the course, who works with Netlogo.

Monday, June 01, 2009

Memoria tra Passato e Futuro - June 3, 2009

The workshop "Memoria tra Passato e Futuro" has been organized in the frame of Livememories, and will be held at Fondazione Bruno Kessler - Trento, Via S. Croce 77, on the 3rd of June 2009.
The workshop aims at discussing on the conception of collective memory, its meaning and its social role considering the newest advancement in the Web technologies. An interdisciplinary discussion on these issues will be of a central part of the workshop. More information can be found on livememories.org.

Workshop Programme:
9.00 Welcome speech - Massimo Poesio, Bernardo Magnini
9.30 Kieron O’Hara - Memories for life: individual, social and technological contributions to extended cognition
10.30 Coffee break
11.00 Alessandro Cavalli - The social construction of collective memories
12.00 Maurizio Giangiulio - Le società ricordano? Maurice Halbwachs e dintorni
13.00 Lunch
14.30 Stef Scagliola, Franciska de Jong - Access to content: the after sales of conducting oral theories
15.30 Anna Lisa Tota - Public memory and cultural trauma theories
16.30 Coffee break
17.00 Final discussion

Scientific Committee

Silvia Gherardi - Sociology and social research Department, UniTN
Maurizio Giangiulio - Philosophy, History and Cultural heritage, UniTN
Bernardo Magnini - HLT Research Unit, FBK
Massimo Poesio - Information Engineering and Computer Science Department/CIMEC, UNiTN

Friday, May 01, 2009

Showcase selection for the LiveMemories project

Yesterday we presented our joint work on the case study of LiveMemories to the project's partners , and proposed the showcase for the first year.
Here it is!