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Celli F.,CIMeC | Pianesi F.,FBK | Stillwell D.,Psychometrics Center | Kosinski M.,Psychometrics Center
AAAI Workshop - Technical Report | Year: 2013

In the Workshop on Computational Personality Recognition (Shared Task), we released two datasets, varying in size and genre, annotated with gold standard personality labels. This allowed participants to evaluate features and learning techniques, and even to compare the performances of their systems for personality recognition on a common benchmark. We had 8 participants to the task. In this paper we discuss the results and compare them to previous literature. Copyright © 2013, Association for the Advancement of Artificial Intelligence. All rights reserved.

Kalimeri K.,CIMeC | Lepri B.,FBK | Lepri B.,Massachusetts Institute of Technology | Kim T.,Massachusetts Institute of Technology | And 2 more authors.
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2011

We propose the use of Granger Causality to model the effects that dominant people induce on the other participants' behavioral patterns during small group interactions. We test the proposed approach on a dataset of brainstorming and problem solving tasks collected using the sociometric badges' accelerometers. The expectation that more dominant people have generalized higher influence is not borne out; however some more nuanced patterns emerge. In the first place, more dominant people tend to behave differently according to the nature of the task: during brainstorming they engage in complex relations where they simultaneously play the role of influencer and of influencee, whereas during problem solving they tend to be influenced by less dominant people. Moreover, dominant people adopt a complementarity stance, increasing or decreasing their body activity in an opposite manner to their influencers. On the other hand, less dominant people react (almost) as frequently with mimicry as with complementary. Finally, we can also see that the overall level of influence in a group can be associated with the group's performance, in particular for problem solving task. © 2011 Springer-Verlag.

Koenderink J.,Catholic University of Leuven | Koenderink J.,University Utrecht | van Doorn A.,University Utrecht | Albertazzi L.,CIMeC | And 2 more authors.
i-Perception | Year: 2015

Does human vision deploy a generic template for open landscapes that might fit the gist of current optical input? In an experiment, participants judged depth order in split-field images in which the two fuzzily delineated half-images were filled with different hues. For the majority of observers, we find a systematic dependence of depth order of these half-images on their hue and/or brightness difference. After minor cleaning of the data, we are left with two mutually wellseparated clusters. Correlation with the statistical distribution of hue and brightness in generic "open landscape" photographs reveals that one cluster correlates with hue, the other with brightness. This suggests that human observers indeed at least partly rely on "generic landscape" templates in the psychogenesis of their visual awareness. © 2015 J Koenderink, A van Doorn, L Albertazzi, J Wagemans.

Zenklusen F.,MAHLE Argentina SA | Cavalieri F.,CIMEC | Luengo C.,CIMEC | Risso J.,CIMEC | Cardona A.,CIMEC
SAE Technical Papers | Year: 2012

Valve engine manufactures have to satisfy the demands of a market that requires to increase the strength of their products and to extend the time between servicing. In a combustion engine valve, the mechanical stresses are generated during the closing event by loads coming mainly from the return spring, the inertia loads of retainer, keeper and stem, closing velocity, valve tilt and the thermal loads from the combustion. The objective of this work is to understand the valve closing process, and to predict numerically the maximum stresses in new valve designs in a shorter time and at lower costs compared with experimental procedures. In this work, the experimental valve stem stress response under impact velocity was registered using strain gauges and then compared by Finite Element Method solutions showing good agreement. Copyright © 2012 SAE International.

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