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Yves Dupont, L'université en miettes. Servitude volontaire, lutte des places et sorcellerie
2014
Lectures
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Pour citer cet article Référence électronique Simon Ridley , « Yves Dupont, L’université en miettes. ...
Yves Dupont, L’université en miettes. ...
doi:10.4000/lectures.14950
fatcat:jzpe5xdhejfmnam54cc3lfu2rq
Spatial+: a novel approach to spatial confounding
[article]
2020
arXiv
pre-print
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Acknowledgements Emiko Dupont is supported by a scholarship from the EPSRC Centre for Doctoral Training in Statistical Applied Mathematics at Bath (SAMBa), under the project EP/L015684/1. ...
arXiv:2009.09420v1
fatcat:2shu6wz5y5ca3mpeldhlfbne2y
Remarks on Determinant Line Bundles, Chern-Simons Forms and Invariants
2002
Mathematica Scandinavica
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Furthermore we construct for families of bundles and connections over manifolds with boundary, a generalized Chern-Simons invariant as a section of a determinant line bundle. ...
Finally we calculate the covariant derivative of the section with respect to the connection obtained johan l. dupont and flemming lindblad johansen in section 2. ...
Simons in [7] (see also Cheeger-Simons [6] or [9] ) for a single connection in a principal bundle over a closed manifold. ...
doi:10.7146/math.scand.a-14376
fatcat:uuuxls4ddrdudcge6chobrlh3y
Vibrotactile Feedback for Vertical 2D Space Exploration
[article]
2020
arXiv
pre-print
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Visually impaired people encounter many challenges in their everyday life, especially when it comes to navigating and representing space. The issue of shopping is addressed mostly on the level of navigation and product detection, but conveying clues about the object position to the user is rarely implemented. This work presents a prototype of vibrotactile wristband using spatiotemporal patterns to help visually impaired users reach an object in the 2D plane in front of them. A pilot study on
arXiv:2003.13934v1
fatcat:kcz3spsgmnfiroewy6xtv64ap4
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... lve blindfolded sighted subjects showed that discretizing space in a seven by seven targets matrix and conveying clues with a discrete pattern on the vertical axis and a continuous pattern on the horizontal axis is an intuitive and effective design.
A dilogarithmic formula for the Cheeger–Chern–Simons class
2006
Geometry and Topology
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We present a simplification of Neumann's formula for the universal Cheeger-Chern-Simons class of the second Chern polynomial. ...
Theorem 1.6 1 4π 2 L equals the Cheeger-Chern-Simons class P 1 modulo 1/24. ...
Relation with the Cheeger-Chern-Simons class In this section we relate the maps constructed above to the Cheeger-Chern-Simons class C 2 . Our goal is to prove the following theorem. ...
doi:10.2140/gt.2006.10.1347
fatcat:eoqhfkxwvvhxrblwjuoz5swdau
On a generalization of Cheeger-Chern-Simons classes
1990
Illinois Journal of Mathematics
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This will be explored in Dupont-Hain-Zucker [D-Ha-Z].
Cheeger-Chern-Simons classes In the following, denotes a smooth principal bundle over a paracompact smooth manifold M. ...
(O) following Cheeger-Simons [Cr-Si], see also Cheeger [Cr] .) ...
doi:10.1215/ijm/1255988266
fatcat:unu7nqpesvgbxpbm3eqfsohhru
Bee conservation: Inclusive solutions
2018
Science
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Augmenting interictal mapping with neurovascular coupling biomarkers by structured factorization of epileptic EEG and fMRI data
[article]
2020
arXiv
pre-print
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Van Eyndhoven a, * , Patrick Dupont b,c , Simon Tousseyn d , Nico Vervliet a , Wim Van Paesschen e,f , Sabine Van
Huffel a , Borbála Hunyadi g
a KU Leuven, Department of Electrical Engineering (ESAT ...
0.79
0.60
0.07
0.47
0.50
15.8
15.0
10.9
7.9
10.2
5.5R = 2
Augmenting interictal mapping with neurovascular coupling biomarkers by
structured factorization of epileptic EEG and fMRI data
Simon ...
arXiv:2004.14185v1
fatcat:cqg4jzfhavhdhalxl2ugadaqim
Augmenting interictal mapping with neurovascular coupling biomarkers by structured factorization of epileptic EEG and fMRI data
2020
NeuroImage
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Patrick Dupont: Conceptualization, Investigation, Writing -original draft. Simon Tousseyn: Data curation, Investigation, Writing -original draft. Nico Vervliet: Software, Writing -original draft. ...
doi:10.1016/j.neuroimage.2020.117652
pmid:33359347
pmcid:PMC7903163
fatcat:w3za4sdl3vdcnnitdpcjm7oxny
Sensitivity of Heterogeneous Marine Benthic Habitats to Subtle Stressors
2013
PLoS ONE
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It is important to understand the consequences of low level disturbances on the functioning of ecological communities because of the pervasiveness and frequency of this type of environmental change. In this study we investigated the response of a heterogeneous, subtidal, soft-sediment habitat to small experimental additions of organic matter and calcium carbonate to examine the sensitivity of benthic ecosystem functioning to changes in sediment characteristics that relate to the environmental
doi:10.1371/journal.pone.0081646
pmid:24312332
pmcid:PMC3842950
fatcat:ft7g7i7efng2zpwfm2hxsde36a
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... reats of coastal eutrophication and ocean acidification. Our results documented significant changes between key biogeochemical and sedimentary variables such as gross primary production, ammonium uptake and dissolved reactive phosphorus flux following treatment additions. Moreover, the application of treatments affected relationships between macrofauna communities, sediment characteristics (e.g., chlorophyll a content) and biogeochemical processes (oxygen and nutrient fluxes). In this experiment organic matter and calcium carbonate showed persistent opposing effects on sedimentary processes, and we demonstrated that highly heterogeneous sediment habitats can be surprisingly sensitive to subtle perturbations. Our results have important biological implications in a world with relentless anthropogenic inputs of atmospheric CO 2 and nutrients in coastal waters.
Unbalanced biparental care during colony foundation in two subterranean termites
2018
Ecology and Evolution
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These colonies were 100 m away from each other for R. grassei and 300 m for R. flavipes, that is, distances that typically ensure colony independence (Perdereau, Bagnères, Dupont, & Dedeine, 2010) . ...
patterns of social interactions may provide important insights into our understanding of the invasive success of R. flavipes (Brossette et al., 2017; Perdereau et al., 2010; Perdereau, Dedeine, Christidès, Dupont ...
doi:10.1002/ece3.4710
pmid:30680106
pmcid:PMC6342128
fatcat:wdz37p5ppjas7cdvkiru36257u
Experimental Analysis on Autonomic Strategies for Cloud Elasticity
2015
2015 International Conference on Cloud and Autonomic Computing
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In spite of the indubitable advantages of elasticity in Cloud infrastructures, some technical and conceptual limitations are still to be considered. For instance, resource start up time is generally too long to react to unexpected workload spikes. Also, the billing cycles' granularity of existing pricing models may incur consumers to suffer from partial usage waste. We advocate that the software layer can take part in the elasticity process as the overhead of software reconfigurations can be
doi:10.1109/iccac.2015.22
dblp:conf/iccac/DupontLOL15
fatcat:rvvv5elqijhwzkoxuietk5qwgi
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... ally considered negligible if compared to infrastructure one. Thanks to this extra level of elasticity, we are able to define cloud reconfigurations that enact elasticity in both software and infrastructure layers so as to meet demand changes while tackling those limitations. This paper presents an autonomic approach to manage cloud elasticity in a crosslayered manner. First, we enhance cloud elasticity with the software elasticity model. Then, we describe how our autonomic cloud elasticity model relies on dynamic selection of elasticity tactics. We present an experimental analysis of a sub-set of those elasticity tactics under different scenarios in order to provide insights on strategies that could drive the autonomic selection of the proper tactics to be applied.
Alteration of gut microbiota with rifampicin does not impair maternal care in the European earwig
[article]
2020
biorxiv/medrxiv
pre-print
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The microbes residing within the gut of an animal host often maximise their own fitness by modifying their host's physiological, reproductive, and behavioural functions. Whereas recent studies suggest that they may also shape host sociality and therefore have critical effects on animal social evolution, the impact of the gut microbiota on maternal care remains unexplored. This is surprising, as this social behaviour is widespread among animals, often determines the fitness of both juveniles and
doi:10.1101/2020.10.08.331363
fatcat:mm5n44kxzndtjmjdmvrejt7udq
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... parents, and is essential in the evolution of complex animal societies. Here, we address this gap in knowledge by testing whether life-long alterations of the gut microbiota with rifampicin - a broad-spectrum antibiotic - impair the expression of pre- and post-hatching maternal care in the European earwig, an insect exhibiting extensive forms of maternal care towards eggs and juveniles. Our results first confirm that rifampicin altered the mothers' gut microbial communities and revealed that the composition of the gut microbiota differs before and after egg care. Contrary to our predictions, however, the rifampicin-induced alterations of the gut microbiota did not modify the expression of pre- or post-hatching care. Independent of maternal care, rifampicin increased the females' feces production and resulted in lighter eggs and juveniles. By contrast, rifampicin altered none of the other 23 physiological, reproductive and longevity traits measured over the females' lifetime. Overall, these findings reveal that altering the gut microbiota does not necessarily affect host sociality. More generally, our results emphasize that not all animals have evolved a co-dependence with their microbiota.
VARIABILIDADE INTRASSAZONAL EXTREMA DA TEMPERATURA DO AR À SUPERFÍCIE NA PENÍNSULA ANTÁRTICA
2014
Ciência e Natura
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23 Doutor(a) do Programa de Pós-Graduação em Meteorologia da UFSM, Santa Maria, RS, Brasil Resumo A Península Antártica (PA) é uma das regiões da Terra onde o aquecimento foi mais acelerado nos últimos 50 anos. Há indícios de que esta tendência esteja associada, em parte, ao aumento da atividade intrasazonal (IS) tropical. Utilizando dados de estações, este estudo mostrou que a variabilidade da temperatura do ar à superfície (Tsup) sobre a PA apresenta um pico estatisticamente significativo na
doi:10.5902/2179460x13880
fatcat:spp6qderqfgvvlfp7sgjus532m
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... scala IS (78 dias). A influência da Oscilação Madden-Julian (MJO) sobre os eventos IS da Tsup na PA foi quantificada: mais de 60% dos eventos foram associados à MJO, via trem de ondas de Rossby com periodicidade em torno de 30-40 dias. Portanto, outros mecanismos precisam ser investigados para explicar a variabilidade IS da Tsup na PA não associada à MJO (NMJO). Tanto os eventos NMJO quanto o total de eventos (MJO + NMJO) foram mais frequentes na primavera. Além disso, nos últimos 12 anos analisados (1998-2009) houve uma maior frequência de eventos MJO do que NMJO, principalmente na primavera e no inverno. Palavras-chaves: extremos de temperatura, variabilidade intrassazonal, MJO, PSA, Península Antártica. Abstract The Antarctic Peninsula (AP) is one of the earth's regions where warming was most rapid in the past 50 years. There are evidences that this trend is linked in part to increased tropical intraseasonal (IS) activity. From stations data, this study showed that the surface air temperature (SAT) variability on the AP has a statistically significant peak in the IS time-scale (78 days). The Madden -Julian Oscillation (MJO) influence on the IS events were quantified: more than 60% of events were associated with MJO via Rossby wave train with periodicity about 30-40 days. Therefore, other mechanisms need to be investigated to explain the IS SAT variability on the AP not associated with the MJO (NMJO). NMJO and total events (MJO + NMJO) were more frequent in the spring. Furthermore, in the last 12 years studied (1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009) there was a higher frequency of MJO than of NMJO events, especially in spring and winter.
Temperature shapes oviposition site selection and post-oviposition egg transport in an insect with parental care
[article]
2021
bioRxiv
pre-print
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Depositing eggs in an area with adequate temperature is often crucial for mothers and their offspring, as the eggs are immobile and therefore cannot avoid exposure to sub-optimal temperatures. However, the importance of temperature on oviposition site selection is less clear when mothers have the capability to avoid these potential adverse effects by both moving their eggs after oviposition and providing other forms of egg care. In this study, we addressed this question in the European earwig,
doi:10.1101/2021.11.23.469705
fatcat:7o4oqfmtofbllmurbyyf4ctme4
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... n insect in which mothers care for the eggs during several months in winter and often move them during this period. Using 60 females from two Canadian populations (St John's and Harvey station) set up under controlled thermal gradients, we demonstrated that earwig females both select oviposition sites according to temperature and move their eggs after oviposition to reach warmer environmental temperatures. While this set of behavioural thermoregulation is present in the two studied populations, its modality of expression was population-specific: St John's females explored greater ranges of temperatures before oviposition, laid their eggs in warmer areas, and moved their eggs quicker toward warm locations. Overall, our study reveals that earwig females have evolved both pre-and post-oviposition behavioural strategies to mitigate the risks inherent to tending eggs during winter. More generally, it also reveals that egg care and egg transport do not prevent behavioural thermoregulation via oviposition site selection and highlights the diversity of behaviours that insects can adopt to enhance their tolerance to global climate change.
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