Institution
University of Avignon
Education•Avignon, Provence-Alpes-Côte-d'Azur, France•
About: University of Avignon is a education organization based out in Avignon, Provence-Alpes-Côte-d'Azur, France. It is known for research contribution in the topics: Population & Speaker recognition. The organization has 1526 authors who have published 3766 publications receiving 88928 citations.
Topics: Population, Speaker recognition, Context (language use), Extraction (chemistry), Wireless network
Papers published on a yearly basis
Papers
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TL;DR: Results show that isomerism, both constitutional and stereochemical, affects the orientations of aminoxyl-NO and/or hydroperoxyl groups relative to the beta-CD annulus for optimal H-bond interaction and stability.
Abstract: Nitrone spin traps are commonly employed as probes for the identification of transient radicals in chemical and biological systems using electron paramagnetic resonance (EPR) spectroscopy. Nitrones have also found applications as therapeutic agent in the treatment of radical-mediated diseases. Therefore, a spin trap that incorporates high reactivity to superoxide radical anion (O2•−), more persistent superoxide adduct, enhanced bioavailability, and selective targeting in one molecular design is desirable. In this work, the synthesis of a nitrone spin trap, 4, that is tethered via amide bonds to a β-cyclodextrin (β-CD) and a dodecyl chain was achieved with the expectation that the β-cyclodextrin would lead to increased reactivity to O2•− and persistent O2•− adduct while the lipophilic chain would impart membrane targeting property. The two constitutional racemic isomers, 4a and 4b, were separated using preparative HPLC, and structural analysis and self-aggregation properties were carried out using NMR, ind...
34 citations
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TL;DR: The results suggest that overexpression of a selenium-independent GPX in tomato plants modifies specifically gene expression and leads to modifications of photosynthetic regulation processes.
34 citations
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TL;DR: The results suggest that seeding after topsoil has been removed is a promising method to reintroduce N. pulchra to highly degraded sites where there is little to no native seed bank.
Abstract: Question: What is the most appropriate combination of treatments to reintroduce Nassella pulchra, a perennial bunchgrass, into degraded mediterranean coastal grasslands? Location: Central coast of California, USA. Methods: N. pulchra was sown from seeds and transplanted into a degraded grassland in a multi-factorial experiment testing the effects of (1) two grazing intensities (lightly grazed by native mammal species or ungrazed); (2) topsoil removal and (3) reduction of plant neighbours. The experiment was carried out on two types of surrounding vegetation (exotic annual grasses and exotic forbs). Results: Topsoil removal greatly enhanced establishment from seeds and transplant survival, mainly because it reduced the exotic vegetation and thus reduced competition. While removing neighbours was essential when topsoil was left intact, it had a negative effect on N. pulchra when surrounding species included exotic forbs (Brassica spec. and Asteraceae) at low density (after topsoil removal). Moderate grazing by native mammals (deer, rabbits and gophers) did not affect N. pulchra. Conclusion: Our results suggest that seeding after topsoil has been removed is a promising method to reintroduce N. pulchra to highly degraded sites where there is little to no native seed bank.
34 citations
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23 Aug 2010TL;DR: Three solutions are investigated: model-level adaptation, score- level adaptation (normalisation), and the combination of the two, called “compound” adaptation, which can be applied to any unimodal or multimodal biometric system, thus facilitating system-level integration and performance optimisation.
Abstract: The performance of biometric systems can be significantly affected by changes in signal quality. In this paper, two types of changes are considered: change in acquisition environment and in sensing devices. We investigated three solutions: (i) model-level adaptation, (ii) score-level adaptation (normalisation), and (iii) the combination of the two, called “compound” adaptation. In order to cope with the above changing conditions, the model-level adaptation attempts to update the parameters of the expert systems (classifiers). This approach requires the authenticity of the candidate samples used for adaptation be known (corresponding to supervised adaptation), or can be estimated (unsupervised adaptation). In comparison, the score-level adaptation merely involves post processing the expert output, with the objective of rendering the associated decision threshold to be dependent only on the class priors despite the changing acquisition conditions. Since the above adaptation strategies treat the underlying biometric experts/classifiers as a black-box, they can be applied to any unimodal or multimodal biometric system, thus facilitating system-level integration and performance optimisation. Our contributions are: (i) proposal of compound adaptation; (ii) investigation and comparison of two different quality-dependent score normalisation strategies; and, (iii) empirical comparison of the merit of the above three solutions on the BANCA face (video) and speech database.
34 citations
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TL;DR: In this paper, a framework to carry out the topological sensitivity analysis in this context is proposed and a numerical example concerning the treatment of ultrasonic probing data in metallic plates is presented.
Abstract: This paper deals with the use of the topological derivative in detection problems involving waves. In the first part, a framework to carry out the topological sensitivity analysis in this context is proposed. Arbitrarily shaped holes and cracks with Neumann boundary condition in 2 and 3 space dimensions are considered. In the second part, a numerical example concerning the treatment of ultrasonic probing data in metallic plates is presented. With moderate noise in the measurements, the defects (air bubbles) are detected and satisfactorily localized by means of a single sensitivity computation.
34 citations
Authors
Showing all 1574 results
Name | H-index | Papers | Citations |
---|---|---|---|
Peter J. Diggle | 85 | 518 | 40325 |
Frédéric Baret | 73 | 289 | 25453 |
Farid Chemat | 71 | 339 | 18533 |
Eitan Altman | 60 | 637 | 16760 |
Mathilde Causse | 56 | 122 | 11973 |
Giancarlo Cravotto | 54 | 484 | 13555 |
Montserrat Dueñas | 52 | 117 | 6401 |
Catherine M.G.C. Renard | 52 | 235 | 9183 |
Pierre Renault | 49 | 172 | 23844 |
Yves Le Conte | 48 | 155 | 7985 |
Christophe Nguyen-The | 47 | 122 | 7499 |
Olivier Ouari | 46 | 145 | 6231 |
Miguel A. Pappolla | 46 | 121 | 9864 |
Marie-Josèphe Amiot | 45 | 113 | 7893 |
Marie Weiss | 44 | 139 | 9955 |