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X-WR-CALDESC:Events for Namur Institute For Complex Systems
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DTSTART;TZID=Europe/Paris:20171207T130000
DTEND;TZID=Europe/Paris:20171207T140000
DTSTAMP:20260408T194510
CREATED:20171116T160011Z
LAST-MODIFIED:20171206T202424Z
UID:243-1512651600-1512655200@www.naxys.be
SUMMARY:Henri Vanhomwegen (UNamur)
DESCRIPTION:Title: Mutual funds styles distinctiveness and financial performance insights from Europe \nAsbtract: Do mutual funds following a same style adopt similar investment strategies? Are these potential differences more salient over certain periods? What drives a mutual fund to be distinct from its peers? Does it pay? Those are central questions for both academics and market practitioners that we aim to address in this paper. More generally\, we propose to study the degree of commonality among European equity mutual funds over time\, and its impact on financial performance. To this end\, we use several market-based measures of commonality among 4957 European equity mutual fund returns over the 1999-2016 period. We pay a particular attention to the computation of adequate metrics\, the so-called « strategy distinctiveness index » applying up-to-date techniques from statistics and machine learning to generate clusters of mutual funds associated to “styles”\, from which we can gauge how similar or distinct a mutual fund is from its peers (i.e. the mutual funds belonging to the same cluster or style). Our results show marked changes in the level of commonality over time\, distinctiveness among European mutual funds decreasing sharply before the crisis before going up and eventually reaching a new low in the recent months. We find strong evidence regarding the contribution of fund-level as well as cluster characteristics to strategy distinctiveness. Turning to financial performance\, our results show a strong and robust\, positive impact of strategy distinctiveness on financial performance.
URL:https://www.naxys.be/event/henri-vanhomwegen-unamur/
LOCATION:E25
CATEGORIES:NAXYS Seminar
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DTSTART;TZID=Europe/Paris:20171214T130000
DTEND;TZID=Europe/Paris:20171214T140000
DTSTAMP:20260408T194510
CREATED:20171116T160402Z
LAST-MODIFIED:20171207T091559Z
UID:246-1513256400-1513260000@www.naxys.be
SUMMARY:Sébastien Clesse (UCL - UNamur)
DESCRIPTION:Title:  Is Dark Matter made of Primordial Black Holes? \nAbstract: The detection of gravitational waves by Advanced-LIGO/VIRGO has opened a wide new field of astronomy.   Strangely\, the merging rate of massive black holes was found to be compatible with the rate expected if they constitute the Dark Matter.  This has revived the interest for Primordial Black Holes (PBH) formed in the early Universe constituting a fraction or even the totality of Dark Matter .  This scenario is however well constrained by other astrophysical observations.  I will review the pros and cons of this scenario\, in the view of the most recent results and observations\, and I will emphasize how PBH Dark Matter could resolve some long-standing cosmological and astrophysical puzzles.   The presentation will be understandable by a broad audience of mathematicians\, physicists and students.
URL:https://www.naxys.be/event/sebastien-clesse-ucl-unamur/
LOCATION:E22
CATEGORIES:NAXYS Seminar
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DTSTART;TZID=Europe/Paris:20171221T130000
DTEND;TZID=Europe/Paris:20171221T140000
DTSTAMP:20260408T194510
CREATED:20171116T160642Z
LAST-MODIFIED:20171205T202348Z
UID:248-1513861200-1513864800@www.naxys.be
SUMMARY:Anthony Hendrickx
DESCRIPTION:Title: Algorithme génétique et Rotifères Bdelloïdes: les mathématiques au service de la biologie \nRésumé: Existant depuis 1962\, les algorithmes génétiques se sont toujours basés sur un mode de reproduction sexuée\, la reproduction asexuée entraînant une accumulation de mutations délétères\, censée provoquer l’extinction de l’espèce. Cependant\, l’espèce du Bdelloïde\, malgré son mode de reproduction asexuée\, survit depuis des dizaines de millions d’années dans des milieux extrêmes et variés. Cette incroyable faculté semble être expliquée par l’observation\, chez cette espèce\, de phénomènes connus sous les noms de conversion génique et transfert horizontal. L’objectif de ce mémoire était de modéliser\, sous forme d’algorithmes génétiques\, l’évolution asexuée du Rotifère Bdelloïde\, afin d’étudier l’importance et l’influence de ces deux phénomènes. Des relations mathématiques connues en génétique\, liant taux de mutation\, longueur d’ADN et taux de conversion génique\, sont retrouvées numériquement\, permettant de valider et de simplifier notre modélisation. L’utilité du phénomène de conversion génique\, permettant de rendre nos algorithmes plus stables\, robustes et précis qu’un algorithme génétique classique\, est ensuite démontrée. Enfin\, l’importance du mécanisme de transfert horizontal\, améliorant l’efficacité du modèle asexué\, est mise en évidence\, permettant d’envisager un algorithme plus efficace que les modèles classiques.
URL:https://www.naxys.be/event/anthony-hendrickx/
LOCATION:E25
CATEGORIES:NAXYS Seminar
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