Gated networks: an inventory

Gated networks are networks that contain gating connections, in which the outputs of at least two neurons are multiplied. Initially, gated networks were used to learn relationships between two input sources, such as pixels from two images. More recently, they have been applied to learning activity recognition or multi-modal representations. The aims of this paper are threefold: 1) to explain the basic computations in gated networks to the non-expert, while adopting a standpoint that insists on their symmetric nature. 2) to serve as a quick reference guide to the recent literature, by providing an inventory of applications of these networks, as well as recent extensions to the basic architecture. 3) to suggest future research directions and applications.Comment: Unpublished manuscript, 17 page

Non-contact, single-sided access ultrasonic guided waves for the assessment of materials mechanical properties

Abstract: Research about material characterization without contact has been carried out by many authors using immersion or laser-based ultrasonic techniques. Immersion techniques however imply that the material is not water sensitive and that the sample fits within the immersion tank. Therefore, it is important to develop a characterization process that is suitable for all types of materials, and ideally not requiring access to both sides of the tested specimen, as this is often not possible in industrial context.Résumé de la communication présentée lors du congrès international tenu conjointement par Canadian Society for Mechanical Engineering (CSME) et Computational Fluid Dynamics Society of Canada (CFD Canada), à l’Université de Sherbrooke (Québec), du 28 au 31 mai 2023

Gated networks: an inventory

Unpublished manuscript, 17 pagesGated networks are networks that contain gating connections, in which the outputs of at least two neurons are multiplied. Initially, gated networks were used to learn relationships between two input sources, such as pixels from two images. More recently, they have been applied to learning activity recognition or multi-modal representations. The aims of this paper are threefold: 1) to explain the basic computations in gated networks to the non-expert, while adopting a standpoint that insists on their symmetric nature. 2) to serve as a quick reference guide to the recent literature, by providing an inventory of applications of these networks, as well as recent extensions to the basic architecture. 3) to suggest future research directions and applications

Genetic determinism of sensitivity to Corynespora cassiicola exudates in rubber tree (Hevea brasiliensis)

An indirect phenotyping method was developed in order to estimate the susceptibility of rubber tree clonal varieties to Corynespora Leaf Fall (CLF) disease caused by the ascomycete Corynespora cassiicola. This method consists in quantifying the impact of fungal exudates on detached leaves by measuring the induced electrolyte leakage (EL%). The tested exudates were either crude culture filtrates from diverse C. cassiicola isolates or the purified cassiicolin (Cas1), a small secreted effector protein produced by the aggressive isolate CCP. The test was found to be quantitative, with the EL% response proportional to toxin concentration. For eight clones tested with two aggressive isolates, the EL% response to the filtrates positively correlated to the response induced by conidial inoculation. The toxicity test applied to 18 clones using 13 toxinic treatments evidenced an important variability among clones and treatments, with a significant additional clone x treatment interaction effect. A genetic linkage map was built using 306 microsatellite markers, from the F1 population of the PB260 x RRIM600 family. Phenotyping of the population for sensitivity to the purified Cas1 effector and to culture filtrates from seven C. cassiicola isolates revealed a polygenic determinism, with six QTL detected on five chromosomes and percentages of explained phenotypic variance varying from 11 to 17%. Two common QTL were identified for the CCP filtrate and the purified cassiicolin, suggesting that Cas1 may be the main effector of CCP filtrate toxicity. The CCP filtrate clearly contrasted with all other filtrates. The toxicity test based on Electrolyte Leakage Measurement offers the opportunity to assess the sensitivity of rubber genotypes to C. cassiicola exudates or purified effectors for genetic investigations and early selection, without risk of spreading the fungus in plantations. However, the power of this test for predicting field susceptibility of rubber clones to CLF will have to be further investigated. (Résumé d'auteur

State Of the Art Report in the fields of numerical analysis and scientific computing. Final version as of 16/02/2020 deliverable D4.1 of the HORIZON 2020 project EURAD.: European Joint Programme on Radioactive Waste Management

Document information Project Acronym EURAD Project Title European Joint Programme on Radioactive Waste Management Project Type European Joint Programme (EJP) EC grant agreement No. 847593 Project starting / end date 1 st June 2019-30 May 2024 Work Package No. 4 Work Package Title Development and Improvement Of NUmerical methods and Tools for modelling coupled processes Work Package Acronym DONUT Deliverable No. 4.

Global Boundary Stratotype Section and Point (GSSP) for the Anthropocene Series: Where and how to look for potential candidates

International audienc

Uppskattning av riktning med visuell odometri

This Master thesis tackles the problem of measuring objects’ directions from a motionlessobservation point. A new method based on a single rotating camera requiring the knowledge ofonly two (or more) landmarks’ direction is proposed. In a first phase, multi-view geometry isused to estimate camera rotations and key elements’ direction from a set of overlapping images.Then in a second phase, the direction of any object can be estimated by resectioning the cameraassociated to a picture showing this object. A detailed description of the algorithmic chain isgiven, along with test results on both synthetic data and real images taken with an infraredcamera.Detta masterarbete behandlar problemet med att mäta objekts riktningar från en fastobservationspunkt. En ny metod föreslås, baserad på en enda roterande kamera som kräverendast två (eller flera) landmärkens riktningar. I en första fas används multiperspektivgeometri,för att uppskatta kamerarotationer och nyckelelements riktningar utifrån en uppsättningöverlappande bilder. I en andra fas kan sedan riktningen hos vilket objekt som helst uppskattasgenom att kameran, associerad till en bild visande detta objekt, omsektioneras. En detaljeradbeskrivning av den algoritmiska kedjan ges, tillsammans med testresultat av både syntetisk dataoch verkliga bilder tagen med en infraröd kamera

Uppskattning av riktning med visuell odometri

This Master thesis tackles the problem of measuring objects’ directions from a motionless observation point. A new method based on a single rotating camera requiring the knowledge of only two (or more) landmarks’ direction is proposed. In a first phase, multi-view geometry is used to estimate camera rotations and key elements’ direction from a set of overlapping images. Then in a second phase, the direction of any object can be estimated by resectioning the camera associated to a picture showing this object. A detailed description of the algorithmic chain is given, along with test results on both synthetic data and real images taken with an infrared camera.Detta masterarbete behandlar problemet med att mäta objekts riktningar från en fast observationspunkt. En ny metod föreslås, baserad på en enda roterande kamera som kräver endast två (eller flera) landmärkens riktningar. I en första fas används multiperspektivgeometri, för att uppskatta kamerarotationer och nyckelelements riktningar utifrån en uppsättning överlappande bilder. I en andra fas kan sedan riktningen hos vilket objekt som helst uppskattas genom att kameran, associerad till en bild visande detta objekt, omsektioneras. En detaljerad beskrivning av den algoritmiska kedjan ges, tillsammans med testresultat av både syntetisk data och verkliga bilder tagen med en infraröd kamera

Régulation de l'expression du régulateur global csrA par le système à deux composants CpxR/A chez E. coli

CsrA est un régulateur global très conservé au sein des bactéries, qui contrôle la stabilité et/ou l'expression des ARN messagers avec lesquels il interagit. CsrA est impliqué dans de nombreuses voies de régulation, notamment le métabolisme central du carbone ainsi que les comportements sociaux tels que la motilité ou la formation de biofilms. De plus, de récents travaux effectués dans notre laboratoire ont montré une influence de CsrA sur l'homéostasie de l'enveloppe. La régulation de l'expression et de l'activité de CsrA est majoritairement due à des boucles de rétrocontrôle au sein du métabolisme central et de la réponse stringente.L’objectif de notre travail était d’identifier de nouveaux régulateurs de l'expression de csrA. Nous avons tout d'abord étudié la modification de 3 phénotypes influencés par CsrA dans différentes souches mutantes. Cette première approche nous a permis d'identifier les systèmes à deux composants CpxR/A et EnvZ/OmpR comme potentiels régulateurs de l'expression de csrA. Nous nous sommes ensuite attaché à caractériser la régulation de l'expression de csrA par CpxR/A. Nous avons montré que CpxR/A régule positivement la transcription de csrA en milieu riche et en milieu chimiquement défini contenant des acides aminés. Nous avons mis en évidence que le facteur de transcription CpxR se lie sur 2 sites de fixation sur la région promotrice de csrA et régule ainsi l'activité du principal promoteur de csrA.CsrA is a global regulator conserved within the bacterial kingdom. CsrA is a post-transcriptional regulator that interacts with messenger RNAs and controls their expression and/or stability. CsrA is involved in numerous pathways, especially in the central carbon metabolism and the social behaviours, like motility and biofilm formation. Moreover, recent data obtained in our lab indicate the implication of CsrA in the envelope homeostasis. The regulation of the expression of CsrA is mainly due to feedback loops taking place in the central carbon metabolism and stringent response.The objective of our work was to identify new regulators of csrA expression. Firstly, we studied the modification of CsrA-dependent phenotypes in different mutant strains. This approach allowed us to identify the 2 two component systems CpxR/A and EnvZ/OmpR as potential regulators of csrA expression. We focused on the characterisation of the regulation of csrA expression by CpxR/A. We demonstrated that CpxR/A up-regulates csrA transcription both in rich and chemically-defined medium supplemented with amino acids. Furthermore, we showed that the transcription factor CpxR binds the csrA promoter region on 2 binding sites and thus regulates the activity of the main promoter of csrA.Doctorat en Sciencesinfo:eu-repo/semantics/nonPublishe