Discriminant of a generic projection of a minimal normal surface singularity

Let $(S,0)$ be a rational complex surface singularity with reduced fundamental cycle, also known as a {\em minimal} singularity. Using a fundamental result by M. Spivakovsky, we explain how to get a minimal resolution of the discriminant curve for a generic projection of $(S,0)$ onto (\C^2,0) directly from the resolution graph of $(S,0)$.Comment: February 2003. Submitted to CRA

General elements of an m-primary ideal on a normal surface singularity

In this paper, we show how to apply a theorem by L\^e D.T. and the author about linear families of curves on normal surface singularities to get new results in this area. The main concept used is a specific definition of {\em general elements} of an ideal in the local ring of the surface. We make explicit the connection between this notion and the elementary notion of general element of a linear pencil, through the use of {\em reduction}. This allows us to prove the invariance of the generic Milnor number (resp. of the multiplicity of the discriminant), between two pencils generating two ideals with the same integral closure (resp. the projections associated). We also show that our theorem, applied in two special cases, on the one hand completes a theorem by Snoussi on the limits of tangent hyperplanes, and on the other hand gives an algebraic $\mu$-constant theorem in linear families of planes curves.Comment: December 200

General elements of an mm-primary ideal on a normal surface singularity

December 2002.In this paper, we show how to apply a theorem by Lê D.T. and the author about linear families of curves on normal surface singularities to get new results in this area. The main concept used is a specific definition of {\em general elements} of an ideal in the local ring of the surface. We make explicit the connection between this notion and the elementary notion of general element of a linear pencil, through the use of {\em reduction}. This allows us to prove the invariance of the generic Milnor number (resp. of the multiplicity of the discriminant), between two pencils generating two ideals with the same integral closure (resp. the projections associated). We also show that our theorem, applied in two special cases, on the one hand completes a theorem by Snoussi on the limits of tangent hyperplanes, and on the other hand gives an algebraic $\mu$-constant theorem in linear families of planes curves

Discriminant of a generic projection of a minimal normal surface singularity

February 2003. Submitted to CRAS.Let $(S,0)$ be a rational complex surface singularity with reduced fundamental cycle, also known as a {\em minimal} singularity. Using a fundamental result by M. Spivakovsky, we explain how to get a minimal resolution of the discriminant curve for a generic projection of $(S,0)$ onto (\C^2,0) directly from the resolution graph of $(S,0)$

Le schwannome pénien: à propos d’un cas

Le Schwannome, ou neurinome, du pénis est une tumeur extrêmement rare. Il s'agit d'une tumeur de la gaine des nerfs péniens. Un homme de 29 ans opéré pour un neurinome du pénis. La tumeur fut réséquée avec  succès tout en préservant la fonction érectile du patient. La résection tumorale est le traitement de choix dans les schwannomes localisés, un suivi régulier est conseillé. Le taux de récidive locale est extrêmement faible après résection complète. A travers cet article, nous allons présenter un nouveau cas de neurinome du pénis et nous allons faire une brève revue de la littérature sur cette pathologie rare.Key words: Schwannome, neurinome, péni

Vers un musée humaniste et inclusif

Cet entretien entre Nathalie Bondil, directrice générale et conservatrice en chef du Musée des beaux-arts de Montréal et Anik Meunier, professeure titulaire en éducation et muséologie et directrice du Groupe de recherche sur l’éducation et les musées (GREM) de l’Université du Québec à Montréal (UQAM), a eu lieu le 1er novembre 2018 à l’occasion du lancement du livre Culture et éducation non formelle. Cet ouvrage collectif dirigé par Daniel Jacobi est le dixième titre de onze publiés dans la collection « Culture et publics », dirigée par Anik Meunier et Jason Luckerhoff, professeur titulaire en culture et communications de l’Université du Québec à Trois-Rivières (UQTR). L’animation a été assurée par Julie Rose, étudiante à la maîtrise en muséologie et assistante de recherche au sein du GREM de l’UQAM

Characteristics of a prototype matrix of Silicon PhotoMultipliers (SiPM)

International audienceThis work reports on the electrical (static and dynamic) as well as on the optical characteristics of a prototype matrix of Silicon Photomultipliers (SiPM). The prototype matrix consists of 4 × 4 SiPM's on the same substrat fabricated at FBK-irst (Trento, Italy). Each SiPM of the matrix has an area of 1 × 1mm2 and it is composed of 625 microcells connected in parallel. Each microcell of the SiPM is a GM-APD (n+/p junction on P+ substrate) with an area of 40 × 40 μm2 connected in series with its integrated polysilicon quenching resistance. The static characteristics as breakdown voltage, quenching resistance, post-breakdown dark current as well as the dynamic characteristics as gain and dark count rate have been analysed. The photon detection efficiency as a function of wavelength and operation voltage has been also estimated