Home » Videos & webcasts

Videos & webcasts

PUPS-IT video

PUPS-IT video demonstrates use of virtual post-it notes. The application has been made as a demonstration for the project Personalised Ubiservices in Public Spaces (PUPS), a Tekes Ubicom project.

Duration: 2:04
Recorded: Summer 2008

Video (edited)
www.hiit.fi/~mjmander/video/Pups-it.mov

Learning to Learn Implicit Queries from Gaze Patterns

A video lecture by  Kai Puolamäki: In the absence of explicit queries, an alternative is to try to infer users' interests from implicit feedback signals, such as clickstreams or eye tracking. The interests, formulated as an implicit query, can then be used in further searches. We formulate this task as a probabilistic model, which can be interpreted as a kind of transfer learning and meta-learning. The probabilistic model is demonstrated to outperform an earlier kernel-based method in a small-scale information retrieval task.

Duration: 20:04
Recorded: The 25th International Conference on Machine Learning (ICML 2008), Helsinki, July 08

Webcast with integrated slide show
Videolectures.net »

Causal Modelling Combining Instantaneous and Lagged Effects: an Identifiable Model Based on Non-Gaussianity

A video lecture by Aapo Hyvärinen: Causal analysis of continuous-valued variables typically uses either autoregressive models or linear Gaussian Bayesian networks with instantaneous effects. Estimation of Gaussian Bayesian networks poses serious identifiability problems, which is why it was recently proposed to use non-Gaussian models. Here, we show how to combine the non-Gaussian instantaneous model with autoregressive models. We show that such a non-Gaussian model is identifiable without prior knowledge of network structure, and we propose an estimation method shown to be consistent. This approach also points out how neglecting instantaneous effects can lead to completely wrong estimates of the autoregressive coefficients.

Duration: 24:36
Recorded: The 25th International Conference on Machine Learning (ICML 2008) , Helsinki, July 08

Webcast with integrated slide show
Videolectures.net »

Virtual Economies Seminar

The AVEA project at the Helsinki Institute for Information Technology HIIT organized an open research seminar on so-called virtual economies. We focused on the following question: "Why should economists and social scientists be interested in virtual economies?" Through discussion and presentations by academic researchers and industry representatives, we investigated the potential of conducting quantitative research on virtual economies that is of interest to mainstream, "serious" researchers.

Duration: 2:15
Recorded: 2 June 08 at 9.45 EET (GMT+3)

Webcast (unedited)
Part 1 (RealMedia) »
Part 2 (RealMedia) »
Part 1-2 (QuickTime) »

CityWall

The CityWall is a large mutli-touch display installed in a central location in Helsinki which acts as a collaborative and playful interface for the everchanging media landscape of the city.

Duration: 2:54
Recorded: June 07

Video (edited)
Youtube »