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Atum: Scalable Group Communication Using Volatile Groups

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Live Streaming with Gossip

Maxime Monod

Peer-to-peer (P2P) architectures have emerged as a popular paradigm to support the dynamic and scalable nature of distributed systems. This is particularly relevant today, given the tremendous increase in the intensity of information exchanged over the Int ...

EPFL2010

Characterising Conversationsal Group Dynamics Using Nonverbal Behaviour

Daniel Gatica-Perez, Dinesh Babu Jayagopi

This paper addresses the novel problemof characterizing conversational group dynamics. It is well documented in social psychology that depending on the objectives a group, the dynamics are different. For example, a competitive meeting has a different objec ...

2009

Discovering Group Nonverbal Conversational Patterns with Topics

Daniel Gatica-Perez, Dinesh Babu Jayagopi

This paper addresses the problem of discovering conversa- tional group dynamics from nonverbal cues extracted from thin-slices of interaction. We first propose and analyze a novel thin-slice interaction descriptor - a bag of group non- verbal patterns - wh ...

2009

Egocentric and object-based transformations in the laterality judgement of human and animal faces and of non-corporeal objects

Silvio Ionta

Mental rotation of body parts is influenced by specific sensory-motor information, and may be performed using an egocentric (subject-based) or an object-based mental transformation. Neurologically healthy volunteers were asked to verbally judge the lateral ...

2009

Cayley Graphs and growth of groups

Nathalie Pellet

One of the most fundamental objects in algebra is the group. There exist plenty of different groups. In the following article we consider some free abelian gorups, cyclic groups, free groups and fundamental groups as well as the products of groups and draw ...

2008

“Alice in London Architecture Festival.”

Jean-Denis Bourquin, Claire Hofmann Chalard

A group of 12 architecture students from EPFL returned from the London Festival of Architecture (19 June-19 July 08), where their contribution, "Overflow", a structure that reacts to tides in the Thames River, was chosen as the best overall project among a ...

EPFL2008

Applications of a theorem of Singerman about Fuchsian groups

Hugo Parlier

Assume that we have a (compact) Riemann surface S, of genus greater than 2, with S = D/Gamma, where D is the complex unit disc and Gamma is a surface Fuchsian group. Let us further consider that S has an automorphism group G in such a way that the orbifold ...

2008

ELLPAG - Economics of Long-Life Pavement

Nicolas Bueche

One of the most important research efforts developed to date is the European Project ELLPAG (European Long-Life Pavement Group). It was founded, in 2002, as a FEHRL group to gather the European knowledge. The group has been active since then, and it has be ...

2008

Degree and valuation of the Schur elements of cyclotomic Hecke algebras

Following the generalization of the notion of families of characters, defined by Lusztig for Weyl groups, to the case of complex reflection groups, thanks to the definition given by Rouquier, we show that the degree and the valuation of the Schur elements ...

Elsevier2008

Perceptual learning requires a minimal number of trials per session, but no sleep

Michael Herzog, Elisa Tartaglia, Carl Kristoffer Aberg

A common assumption in perceptual learning is that the improvement of performance basically depends on the amount of training. However, other factors such as sleep and training intensity (trials per session) have also been shown to be important. We trained ...

Association for Research in Vision and Ophthalmology2008