David A. van Leeuwen

TL;DR: In this paper, local density functional calculations and experimental magnetization studies on giant nickel carbonyl clusters are presented, and the results show convincingly that the effect of the carbonyls ligation is to quench completely the magnetic moments of the nickel atoms at the surface of the clusters, leaving the inner core metal atoms relatively unaffected.

TL;DR: The development of a gender-independent laugh detector is described with the aim to enable automatic emotion recognition and acoustic measurements showed differences between laughter and speech in mean pitch and in the ratio of the durations of unvoiced to voiced portions, which indicate that these prosodic features are indeed useful for discrimination between laughed and speech.

TL;DR: This paper describes data collection efforts conducted as part of the RedDots project which is dedicated to the study of speaker recognition under conditions where test utterances are of short duration and of variable phonetic content.

TL;DR: The effect of duration variability on phoneme distributions of speech utterances and i-vector length is analyzed and it is demonstrated that, as utterance duration is decreased, number of detected unique phonemes andi- vector length approaches zero in a logarithmic and non-linear fashion.

TL;DR: A simple global calibration metric is proposed that can be generally applied to a multiple-hypothesis problem and it is demonstrated experimentally on some NIST-LRE-'05 data how this relates to the calibration of some of the derived binary-hypotheses sub-problems.