Julien Coussement, David Lebeaux, Christian van Delden, Hélène Guillot, R. Freund, Sierk Marbus, Giovanna Melica, Eric Van Wijngaerden, Benoît Douvry, Steven Van Laecke, Fanny Vuotto, Leïla Tricot, Mario Fernández‐Ruiz, Jacques Dantal, Cèdric Hirzel, Jean‐Philippe Jaïs, Verónica Rodríguez-Nava, Olivier Lortholary, Frédérique Jacobs, James Anstey, Martine Antoine, Asmae Belhaj, Jerina Boelens, Hans De Beenhouwer, Julien De Greef, Catherine Denis, Erwin Ho, Margareta Ieven, Stijn Jonckheere, Christiane Knoop, Alaín Le Moine, Hector Rodríguez-Villalobos, Judith Racapé, Sandrine Roisin, Bernard Vandercam, Marie-Laure Vander Zwalmen, Gaëlle Vanfraechem, Jan Verhaegen, Albert M. Vollaard, Herman F. Wunderink, Katia Boggian, Adrian Egli, Christian Garzoni, Matthias Hoffmann, Hans H. Hirsch, Nina Khanna, Oriol Manuel, Pascal Meylan, Nicolas J. Mueller, Klara M. Posfay‐Barbe, Diem‐Lan Vu, Maja Weisser, Benoı̂t Barrou, Pascal Battistella, Emmanuelle Bergeron, Nicolas Bouvier, Sophie Caillard, Éric Caumes, H. Chaussade, Cécile Chauvet, Romain Crochette, Éric Epailly, Marie Essig, Sébastien Gallien, R. Guillemain, Canan Herel, Bruno Hoën, Nassim Kamar, Thierry Le Gall, Arnaud Lionet, Hélène Longuet, Marie Matignon, Anaick Miel, Hélène Morel, Salima Ould Ammar, S. Pattier, Marie‐Noelle Péraldi, Johnny Sayegh, Anne Scemla, A. Sénéchal, Jérôme Tourret,
Background. Nocardiosis is a rare, life-threatening opportunistic infection, affecting 0.04% to 3.5% of patients after solid organ transplant (SOT). The aim of this study was to identify risk factors for Nocardia infection after SOT and to describe the presentation of nocardiosis in these patients.
Tópico(s): Diagnosis and treatment of tuberculosis
2016 - Oxford University Press | Clinical Infectious Diseases
Marie‐Josée Bergeron, Nicolas Feau, Don Stewart, Philippe Tanguay, Richard C. Hamelin,
Biosurveillance is a proactive approach that may help to limit the spread of invasive fungal pathogens of trees, such as rust fungi which have caused some of the world's most damaging diseases of pines and poplars. Most of these fungi have a complex life cycle, with up to five spore stages, which is completed on two different hosts. They have a biotrophic lifestyle and may be propagated by asymptomatic plant material, complicating their detection and identification. A bioinformatics approach, based ...
Tópico(s): Bioenergy crop production and management
2019 - Public Library of Science | PLoS ONE
Sophie Brajon, Nadine Ringgenberg, Stephanie Torrey, Renée Bergeron, Nicolas Devillers,
Prenatal stress (PNS) can have detrimental effects on behaviour and welfare, such as decreased exploration. Whether housing enrichment before weaning compensate negative effect of PNS in commercial pigs is unknown. To address this question, 44 sows were assigned to either a mixing stress (T) or a control (C) treatment in mid-gestation. During lactation, half of the T and C sows were housed with their 12-piglets litter in straw enriched pens (E) while the others were housed in standard farrowing crates ( ...
Tópico(s): Human-Animal Interaction Studies
2017 - Elsevier BV | Applied Animal Behaviour Science
Alexandre Alanio, Jean Ménotti, Maud Gits‐Muselli, Samia Hamane, Blandine Denis, Emmanuel Rafoux, Régis Peffault de la Tour, Sophie Touratier, Anne Bergeron, Nicolas Guigue, Stéphane Bretagne,
The performance of antigen galactomannan (GM) for diagnosing invasive aspergillosis (IA) is hampered by the occurrence of false-positive results. Quantitative PCR has been proposed to improve the diagnosis of IA. Therefore, we analyzed the value of performing a PCR test to the GM-positive serum sample. Using a quantitative PCR assay specific for Aspergillus fumigatus 28S ribosomal DNA, we retrospectively tested 422 GM-positive (Platelia Bio-Rad kit) serum samples collected over 1 year from 147 patients. ...
Tópico(s): Plant Pathogens and Fungal Diseases
2017 - Frontiers Media | Frontiers in Microbiology
David Lebeaux, R. Freund, Christian van Delden, Hélène Guillot, Sierk Marbus, Marie Matignon, Eric Van Wijngaerden, Benoît Douvry, Julien De Greef, Fanny Vuotto, Leïla Tricot, Mario Fernández‐Ruiz, Jacques Dantal, Cèdric Hirzel, Jean‐Philippe Jaïs, Verónica Rodríguez-Nava, Frédérique Jacobs, Olivier Lortholary, Julien Coussement, James Anstey, Martine Antoine, Nathalie Ausselet, Asmae Belhaj, Jerina Boelens, Hans De Beenhouwer, Catherine Denis, Erwin Ho, Margareta Ieven, Stijn Jonckheere, Christiane Knoop, Alaín Le Moine, Hector Rodríguez-Villalobos, Judith Racapé, Sandrine Roisin, Bernard E. Van Beers, Marie-Laure Vander Zwalmen, Gaëlle Vanfraechem, Steven Van Laecke, Jan Verhaegen, Benoı̂t Barrou, Pascal Battistella, Emmanuelle Bergeron, Nicolas Bouvier, Sophie Caillard, Éric Caumes, H. Chaussade, Cécile Chauvet, Romain Crochette, Éric Epailly, Marie Essig, Sébastien Gallien, R. Guillemain, Canan Herel, Bruno Hoën, Nassim Kamar, Thierry Le Gall, C. Levi, Arnaud Lionet, Hélène Longuet, Giovanna Melica, Anaick Miel, Hélène Morel, Salima Ould Ammar, S. Pattier, Marie‐Noelle Péraldi, Johnny Sayegh, Anne Scemla, A. Sénéchal, Jérôme Tourret, Katia Boggian, Adrian Egli, Christian Garzoni, Matthias Hoffman, Hans H. Hirsch, Nina Khanna, Oriol Manuel, Pascal Meylan, Nicolas J. Mueller, Klara M. Posfay‐Barbe, Diem‐Lan Vu, Maja Weisser, Albert M. Vollaard, Herman F. Wunderink,
Summary In our study of 117 organ transplant recipients with nocardiosis, a history of tumor, invasive fungal infection, donor age, and no acute rejection were independently associated with 1-year mortality. Short-course antibiotic treatment (≤120 days), used in 17 patients, appeared promising.
Tópico(s): Infectious Diseases and Mycology
2017 - Oxford University Press | Clinical Infectious Diseases
Nadine Ringgenberg, Renée Bergeron, Nicolas Devillers,
Tópico(s): Animal Nutrition and Physiology
2010 - Elsevier BV | Applied Animal Behaviour Science
Jean-Michel Beaudoin, Renée Bergeron, Nicolas Devillers, Jean-Paul Laforest,
Enrichment objects can be a practical way to provide rooting and chewing material to growing pigs, on which they can express species-specific behaviors. The challenge is to provide enrichment objects that will satisfy pigs' behavioral needs, while being practical and low-cost for the producers. Two trials were conducted to evaluate the effects of object characteristics such as design, location, cleanliness or degree of wear, on pigs' interest over time. The first trial compared seven objects, varying ...
Tópico(s): Effects of Environmental Stressors on Livestock
2019 - Multidisciplinary Digital Publishing Institute | Animals
Isabel Leal, Marie‐Josée Bergeron, Nicolas Feau, Clement K. M. Tsui, B. Foord, Kevin Pellow, Richard C. Hamelin, Rona N. Sturrock,
Coniferiporia sulphurascens is a facultative fungal pathogen that causes laminated root rot (LRR) in commercially important coniferous species worldwide. This fungus spreads primarily by way of vegetative mycelium transferring at points of contact between infected and healthy roots. Successful intervention to control LRR requires a better understanding of the population structure and genetic variability of C. sulphurascens. In this study, we investigated the population genetic structure and origin ...
Tópico(s): Plant Pathogens and Resistance
2018 - American Phytopathological Society | Phytopathology
Marie‐Michèle Dufour, Nicolas Bergeron, Axelle Rabasa, Stéphane Guay, Steve Geoffrion,
Health-care workers (HCW) exposed to COVID-19 are at risk of experiencing psychological distress. Although several cross-sectional studies have been carried out, a longitudinal perspective is needed to better understand the evolution of psychological distress indicators within this population. The objectives of this study were to assess the evolution of psychological distress and to identify psychological distress trajectories of Canadian HCW during and after the first wave of COVID-19.This prospective ...
Tópico(s): Resilience and Mental Health
2021 - SAGE Publishing | The Canadian Journal of Psychiatry
Geneviève Belleville, Marie‐Christine Ouellet, Jessica Lebel, Sunita Ghosh, Charles M. Morin, Stéphane Bouchard, Stéphane Guay, Nicolas Bergeron, Tavis S. Campbell, Frank P. MacMaster,
Background: The 2016 wildfires in Fort McMurray (Alberta, Canada) led to a massive displacement of 88,000 people and destroyed 2,400 homes. Although no direct human fatality resulted, many individuals feared for their lives or those of their loved ones. Objectives: (1) To estimate the prevalence of post-traumatic stress, major depressive, insomnia, generalized anxiety, and substance use disorders in the adult population of Fort McMurray 1 year after the evacuation; (2) To identify pre-, peri-, and ...
Tópico(s): Homelessness and Social Issues
2021 - Frontiers Media | Frontiers in Public Health
We study algebraic cycles on moduli spaces Fh of h-polarized hyper-Kähler manifolds. Following previous work of Marian, Oprea, and Pandharipande on the tautological conjecture on moduli spaces of K3 surfaces, we first define the tautological ring on Fh. We then study the images of these tautological classes in the cohomology groups of Fh and prove that most of them are linear combinations of Noether–Lefschetz cycle classes. In particular, we prove the cohomological version of the tautological conjecture ...
Tópico(s): Advanced Algebra and Geometry
2019 - Duke University Press | Duke Mathematical Journal
Miklós Abért, Nicolas Bergeron, Ian Biringer, Tsachik Gelander, Nikolay Nikolav, Jean Raimbault, Iddo Samet,
We study the asymptotic behaviour of Betti numbers, twisted torsion and other spectral invariants of sequences of locally symmetric spaces.Our main results are uniform versions of the DeGeorge-Wallach Theorem, of a theorem of Delorme and various other limit multiplicity theorems.A basic idea is to adapt the notion of Benjamini-Schramm convergence (BSconvergence), originally introduced for sequences of finite graphs of bounded degree, to sequences of Riemannian manifolds, and analyze the possible ...
Tópico(s): Random Matrices and Applications
2017 - Princeton University | Annals of Mathematics
Nicolas Bergeron, Zhiyuan Li, John J. Millson, Colette Mœglin,
We prove the Noether-Lefschetz conjecture on the moduli space of quasi-polarized K3 surfaces. This is deduced as a particular case of a general theorem that states that low degree cohomology classes of arithmetic manifolds of orthogonal type are dual to the classes of special cycles, i.e. sub-arithmetic manifolds of the same type. For compact manifolds this was proved in [3], here we extend the results of [3] to non-compact manifolds. This allows us to apply our results to the moduli spaces of quasi- ...
Tópico(s): Geometry and complex manifolds
2016 - Springer Science+Business Media | Inventiones mathematicae
Nicolas Bergeron, John J. Millson, Colette Mœglin,
Let S be a closed Shimura variety uniformized by the complex n-ball associated with a standard unitary group. The Hodge conjecture predicts that every Hodge class in H2k(S,Q), k=0,⋯,n, is algebraic. We show that this holds for all degrees k away from the neighborhood ]13n,23n[ of the middle degree. We also prove the Tate conjecture for the same degrees as the Hodge conjecture and the generalized form of the Hodge conjecture in degrees away from an interval (depending on the codimension c of the subvariety) ...
Tópico(s): Geometry and complex manifolds
2016 - Mittag-Leffler Institute | Acta Mathematica
Sylvain Hallé, Nicolas Bergeron, Francis Guérin, Gabriel Le Breton, Oussama Beroual,
The paper focuses on bugs in web applications that can be detected by analyzing the contents and layout of page elements inside a browser's window. Based on an empirical analysis of 35 real-world web sites and applications (such as Facebook, Dropbox, and Moodle), it provides a survey and classification of more than 90 instances of layout-based bugs. It then introduces Cornipickle, an automated testing tool that provides a declarative language to express desirable properties of a web application as ...
Tópico(s): Software Testing and Debugging Techniques
2016 - Elsevier BV | Journal of Logical and Algebraic Methods in Programming
This text is an introduction to the spectral theory of the Laplacian on compact or finite area hyperbolic surfaces. For some of these surfaces, called "arithmetic hyperbolic surfaces", the eigenfuncti
Tópico(s): Mathematical Dynamics and Fractals
2016 - Springer Nature | Universitext
Nicolas Bergeron, John J. Millson, Colette Mœglin,
We show that special cycles generate a large part of the cohomology of locally symmetric spaces associated to orthogonal groups. We prove in particular that classes of totally geodesic submanifolds generate the cohomology groups of degree |$n$| of compact congruence |$p$|-dimensional hyperbolic manifolds “of simple type” as long as |$n$| is strictly smaller than |$\frac{p}{3}$|. We also prove that for connected Shimura varieties associated to |$\mathcal{O} (p,2)$| the Hodge conjecture is true for classes of ...
Tópico(s): Geometry and complex manifolds
2016 - Oxford University Press | International Mathematics Research Notices
Nicolas Bergeron, Mehmet Haluk Şengün, Akshay Venkatesh,
Let M be an arithmetic hyperbolic 3-manifold, such as a Bianchi manifold. We conjecture that there is a basis for the second homology of M, where each basis element is represented by a surface of `low' genus, and give evidence for this. We explain the relationship between this conjecture and the study of torsion homology growth.
Tópico(s): Topological and Geometric Data Analysis
2016 - Duke University Press | Duke Mathematical Journal
Nicolas Bergeron, Elisha Falbel, Antonin Guilloux,
In the paper we define a "volume" for simplicial complexes of flag tetrahedra.This generalizes and unifies the classical volume of hyperbolic manifolds and the volume of CR tetrahedra complexes considered in [4,6].We describe when this volume belongs to the Bloch group and more generally describe a variation formula in terms of boundary data.In doing so, we recover and generalize results of Neumann-Zagier [13], Neumann [11], and Kabaya [10].Our approach is very related to the work of Fock and Goncharov [ ...
Tópico(s): Advanced Algebra and Geometry
2014 - Mathematical Sciences Publishers | Geometry & Topology
Nicolas Bergeron, Peter A. Linnell, Wolfgang Lück, Roman Sauer,
We study the asymptotic growth of Betti numbers in tower of finite covers and provide simple proofs of approximation results, which were previously obtained by Calegari and Emerton, in the generality of arbitrary $p$-adic analytic towers of covers. Further, we also obtain partial results about arbitrary pro-$p$ towers.
Tópico(s): Mathematical Dynamics and Fractals
2014 - European Mathematical Society | Groups Geometry and Dynamics
Nicolas Bergeron, Laurent Clozel,
En nous basant sur les résultats d’Arthur ( http://www.claymath.org/cw/arthur/ , 2011) (annoncés dans Arthur in Harmonic Analysis, the Trace Formula, and Shimura Varieties, pp. 1–263, 2005) nous démontrons les conjectures énoncées dans Bergeron (Int. Math. Res. Not. 20 : 1089–1122, 2003 ; Mém. Soc. Math. Fr. 106, 2006) et Bergeron et Clozel (Astérisque 303, 2005) dans le cas des groupes orthogonaux à l’exclusion des groupes de type 6 D 4. En ce qui concerne ces derniers, nous annonçons la démonstration que ...
Tópico(s): Homotopy and Cohomology in Algebraic Topology
2012 - Springer Science+Business Media | Inventiones mathematicae
Nicolas Bergeron, Akshay Venkatesh,
HTML view is not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button. When does the amount of torsion in the homology of an arithmetic group grow exponentially with the covolume? We give many examples where this is the case, and conjecture precise conditions.
Tópico(s): Homotopy and Cohomology in Algebraic Topology
2012 - Cambridge University Press | Journal of the Institute of Mathematics of Jussieu
Nastaran Faghihnia, Lara M. Mangravite, Sally Chiu, Nicolas Bergeron, Ronald M. Krauss,
Small dense low-density lipoprotein (LDL) particles and apolipoprotein (apo) CIII are risk factors for cardiovascular disease (CVD) that can be modulated by diet, but there is little information regarding the effects of dietary saturated fat on their plasma levels. We tested the effects of high vs low saturated fat intake in the context of a high beef protein diet on levels and composition of LDL subclasses and on apoCIII levels in plasma and LDL. Following consumption of a baseline diet (50% carbohydrate ( ...
Tópico(s): Lipoproteins and Cardiovascular Health
2012 - Springer Nature | European Journal of Clinical Nutrition
Nicolas Bergeron, Daniel T. Wise,
We give a criterion in terms of the boundary for the existence of a proper cocompact action of a word-hyperbolic group on a ${\rm CAT}(0)$ cube complex. We describe applications towards lattices and hyperbolic 3-manifold groups. In particular, by combining the theory of special cube complexes, the surface subgroup result of Kahn-Markovic, and Agol's criterion, we find that every subgroup separable closed hyperbolic 3-manifold is virtually fibered.
Tópico(s): Advanced Combinatorial Mathematics
2012 - Johns Hopkins University Press | American Journal of Mathematics
Miklós Abért, Nicolas Bergeron, Ian Biringer, Tsachik Gelander, Nikolay Nikolov, Jean Raimbault, Iddo Samet,
Tópico(s): Mathematical Dynamics and Fractals
2011 - Elsevier BV | Comptes Rendus Mathématique
Nicolas Bergeron, Frédéric Haglund, Daniel T. Wise,
We prove that the fundamental groups of 'standard' arithmetic hyperbolic manifolds virtually retract onto their geometrically finite subgroups. In particular, this implies that the homology groups of immersed totally geodesic hypersurfaces of compact arithmetic hyperbolic manifolds virtually inject in the homology groups of the ambient manifold.
Tópico(s): Advanced Algebra and Geometry
2011 - Wiley | Journal of the London Mathematical Society
A. Giraldo, Jo Aubert, Nicolas Bergeron, Eric Derckx, B. Johan Feenstra, Romaric Massard, Jurrien Mans, Anthony Slack, Paul A. Vermeulen,
Abstract— Electrowetting‐based displays have been successfully demonstrated in reflective mode, showing video capability and high optical performance. However, because this technology is based on a high‐efficiency optical switch operating between a light‐absorbing state and a light‐transmitting state, the technology lends itself naturally to a transmissive mode enabling a complete range of applications. This paper describes the first active‐matrix full‐color transmissive electrowetting displays ...
Tópico(s): Interactive and Immersive Displays
2010 - Wiley | Journal of the Society for Information Display
A. Giraldo, Jo Aubert, Nicolas Bergeron, Fahong Li, Anthony Slack, Melanie Van de Weijer,
Abstract In the past, electrowetting‐based displays have been successfully demonstrated in reflective mode, showing video capability and high optical performances. In this paper, we demonstrate for the first time that this technology can be extended to the transmissive mode enabling a large variety of applications. This paper describes the main technical and system aspects and explores the capability of this high efficiency optical switch.
Tópico(s): Interactive and Immersive Displays
2009 - Wiley | SID Symposium Digest of Technical Papers
Sébastien Ouimet, Richard R. Riker, Nicolas Bergeron, Mariève Cossette, Brian P. Kavanagh, Yoanna Skrobik,
Tópico(s): Alcoholism and Thiamine Deficiency
2007 - Springer Science+Business Media | Intensive Care Medicine
Nicolas Bergeron, Yoanna Skrobik, Marc‐Jacques Dubois,
Tópico(s): Anesthesia and Neurotoxicity Research
2005 - Springer Science+Business Media | Intensive Care Medicine