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Search Results: 1 - 10 of 1317 matches for " Bresson Damien "
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Oblique Corpectomy to Manage Cervical Myeloradiculopathy
Chibbaro Salvatore,Makiese Orphee,Bresson Damien,Reiss Alisha,Poczos Pavel,George Bernard
Neurology Research International , 2011, DOI: 10.1155/2011/734232
Abstract: Background. The authors describe a lateral approach to the cervical spine for the management of spondylotic myeloradiculopathy. The rationale for this approach and surgical technique are discussed, as well as the advantages, disadvantages, complications, and pitfalls based on the author's experience over the last two decades. Methods. Spondylotic myelo-radiculopathy may be treated via a lateral approach to the cervical spine when there is predominant anterior compression associated with either spine straightening or kyphosis, but without vertebral instability. Results. By using a lateral approach, the lateral aspect of the cervical spine and the vertebral artery are easily reached and visualized. Furthermore, the lateral part of the affected intervertebral disc(s), uncovertebral joint(s), vertebral body(ies), and posterior longitudinal ligament can be removed as needed to decompress nerve root(s) and/or the spinal cord. Conclusion. Multilevel cervical oblique corpectomy and/or lateral foraminotomy allow wide decompression of nervous structures, while maintaining optimal stability and physiological motion of the cervical spine. 1. Introduction Cervical spondylotic myelopathy (CSM) and cervical spondylotic radiculopathy (CSR) are classically approached by anterior single or multiple disc space decompression [1, 2], multilevel corpectomy [3], laminectomy [4–10], or laminoplasty [11–18]. More recently, techniques using lateral multiple oblique corpectomy (MOC) and/or foraminotomy [19–28] have been used with increasing frequency. In general, when three or more levels are affected, the preferred techniques remain either an anterior multilevel corpectomy or a posterior route such as laminectomy, open door laminoplasty, and posterior foraminotomy. However, the best management of such pathology (especially if 3 or more levels are involved) remains controversial. The authors consider the cervical spine lateral approach a valid and safe option to treat such pathologies as it provides very good clinical results and maintains long-term spinal stability. The goal of this paper is to further and critically present the idea and rationale of the cervical spine lateral approach with its advantages, disadvantages, complications, and pitfalls in a critical review of their last 2 decades experience. 2. Technique Indication Predominant anterior compression associated with either straightening or kyphosis of the cervical spine in the absence of instability is the general indication for the proposed technique. In cases of both anterior and posterior compression, the posterior
La précarité : une catégorie d’analyse pertinente des enjeux de la norme d’emploi et des situations sociales d’entre-deux
Maryse Bresson
SociologieS , 2011,
Abstract: Le présent article propose de prolonger le débat sur La précarité commencé dans la livraison de SociologieS mise en ligne le 27 septembre 2010. Il met en perspective les analyses d’Henri Eckert et Mircea Vultur, et propose une grille d’analyse de la précarité ou plus exactement, ici, des emplois dits atypiques . L’auteure invite à distinguer d’une part, les représentations sociales et les ressentis subjectifs des individus ; d’autre part, les processus économiques et sociaux associés aux transformations du marché du travail, afin de mieux articuler ensuite ces deux dimensions, en insistant sur l’enjeu de la norme d’emploi, et sur l’idée d’entre-deux proposée comme clé de lecture de la précarité. Precariousness: a pertinent analysis of the standard of employment issues and of "in-between" social situationsThis paper proposes to extend the debate on "Precariousness" started in SociologieS online on September 27, 2010. It puts into perspective analyses of Henry Eckert and Mircea Vultur, and offers an analysis of precariousness, or more precisely, here, jobs as "atypical". The author invites to distinguish, on the one hand, social representations and how individualsfeel subjectively the precariousness; on the other hand, economic and social processes associated to changes in the labour market, in order to better articulate these two dimensions, with particular emphasis on the issue of the standard of employment, and on the idea of "in-between" proposed as a key to reading the precariousness. Es la precariedad un concepto pertinente en lo que concierne la problemática del empleo y des situaciones sociales ambiguas?Este artículo es la continuación del debate sobe la precariedad publicado en la red en Sociologies el 27 septiembre de 2010. Pone en perspectiva los análisis de Henri Eckert y de Mircea Vultur y presenta un panel de análisis de la precariedad en particular de los empleos inhabituales. La autora distingue las representaciones sociales y las impresiones subjetivas de los individuos y por otra parte los procesos económicos y sociales asociados a las transformaciones del contexto laboral con el fin de articular estas dos dimensiones, insistiendo sobre la norma del trabajo y sobre el hecho que los empleos se sitúan frecuentemente en una encrucijada de la que parten direcciones y normas divergentes.
L'automatisation intégrale de la distillation en discontinu. Deuxième Partie : Fonctionnement de l'automate de distillation TILBIP 640 Integral Automation of Bath Distillation. Part Two : How the Tilbip 640 Distillation Robot Works
Bresson E.,Follain G.
Oil & Gas Science and Technology , 2006, DOI: 10.2516/ogst:1974024
Abstract: Les auteurs, abordent plus un détail, dans la deuxième partie de cet article, la fa on dont les fonctions de contr le de la distillation en discontinu sont réalisées dans l'automate intégral de distillation. On examine, pour chacun des problèmes rencontrés, les raisons tant théoriques que pratiques, voire même technologiques, qui ont conduit à la réalisation de cet automate de distillation. Si l'automatisation complète d'un poste de distillation en discontinu doit nécessairement porter sur l'ensemble des fonctions, on distingue cependant, pour la clarté des explications, quatre fonctions fondamentales et quatre fonctions annexes. Part 2 of this article gives further details about how the batch-distillation control functions are designed in the integral distillation robot. For each of the problems encountered, the article examines both the theoretical and practical reasons, and even the technological ones, that underly the construction of this distillation robot. Whereas the complete automation of a batch-distillation station must necessarily cover all the functions, four basic functions and four allied functions are singled out for the sake of clarity in the explanations.
TV-SVM: Total Variation Support Vector Machine for Semi-Supervised Data Classification
Xavier Bresson,Ruiliang Zhang
Computer Science , 2012,
Abstract: We introduce semi-supervised data classification algorithms based on total variation (TV), Reproducing Kernel Hilbert Space (RKHS), support vector machine (SVM), Cheeger cut, labeled and unlabeled data points. We design binary and multi-class semi-supervised classification algorithms. We compare the TV-based classification algorithms with the related Laplacian-based algorithms, and show that TV classification perform significantly better when the number of labeled data is small.
I.C.E.: a Transportable Atomic Inertial Sensor for Test in Microgravity
Robert A. Nyman,Gael Varoquaux,Fabien Lienhart,Damien Chambon,Salah Boussen,Jean-Fran?ois Clément,T. Muller,Giorgio Santarelli,Frank Pereira Dos Santos,André Clairon,Alexandre Bresson,Arnaud Landragin,Philippe Bouyer
Physics , 2006,
Abstract: We present our the construction of an atom interferometer for inertial sensing in microgravity, as part of the I.C.E. (\textit{Interf\'{e}rom\'{e}trie Coh\'{e}rente pour l'Espace}) collaboration. On-board laser systems have been developed based on fibre-optic components, which are insensitive to mechanical vibrations and acoustic noise, have sub-MHz linewidth, and remain frequency stabilised for weeks at a time. A compact, transportable vacuum system has been built, and used for laser cooling and magneto-optical trapping. We will use a mixture of quantum degenerate gases, bosonic $^{87}$Rb and fermionic $^{40}$K, in order to find the optimal conditions for precision and sensitivity of inertial measurements. Microgravity will be realised in parabolic flights lasting up to 20s in an Airbus. We show that the factors limiting the sensitivity of a long-interrogation-time atomic inertial sensor are the phase noise in reference frequency generation for Raman-pulse atomic beam-splitters and acceleration fluctuations during free fall.
Free Anterolateral Thigh Perforator Flap for Head and Neck Cancer Resection in a Nonagenarian  [PDF]
Frank Lin, Damien Grinsell
Modern Plastic Surgery (MPS) , 2012, DOI: 10.4236/mps.2012.21001
Abstract: With an aging population, free flap reconstruction for head and neck cancer ablation in the elderly is becoming more commonplace. In nonagenarians, however, such major operations are still rarely offered due to its physiological demands. We report the first case of successful resection and reconstruction of head and neck cancer with a free perforator flap in a 96 year old patient. We feel that with careful patient and flap selection, careful preoperative workup and close collaboration between treating teams, age alone should not preclude patients from receiving the best possible curative treatment and reconstruction in head and neck cancers. Even in nonagenarians, perforator free flaps, such as the anterolateral thigh flap, can be used safely to achieve good functional and aesthetic outcomes.
An Inquiry into the Effectiveness of Student Generated MCQs as a Method of Assessment to Improve Teaching and Learning  [PDF]
Damien Hutchinson, Jason Wells
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.47A2014
Abstract:

In anticipation of helping students mature from passive to more active learners while engaging with the issues and concepts surrounding computer security, a student generated Multiple Choice Question (MCQ) learning strategy was designed and deployed as a replacement for an assessment task that was previously based on students providing solutions to a series of short-answer questions. To determine whether there was any educational value in students generating their own MCQs students were required to design MCQs. Prior to undertaking this assessment activity each participant completed a pre-test which consisted of 45 MCQs based on the topics of the assessment. Following the assessment activity the participants completed a post-test which consisted of the same MCQs as the pre-test. The pre and post test results as well as the post test and assessment activity results were tested for statistical significance. The results indicated that having students generate their own MCQs as a method of assessment did not have a negative effect on the learning experience. By providing a framework to the students based on the literature to support their engagement with the learning material, we believe the creation of well-structured MCQs resulted in a more advanced understanding of the relationships between the concepts of the learning material as compared with plainly answering a series of short-answer questions from a textbook. Further study is required to determine to what degree this learning strategy encouraged a deeper approach to learning.

What Is the Natural Weight of the Current Old?  [PDF]
Damien Gaumont, Daniel Leonard
Theoretical Economics Letters (TEL) , 2013, DOI: 10.4236/tel.2013.35043
Abstract: We consider a simple overlapping generations model with an externality à la Arrow-Romer [1,2] and a government with fiscal powers. If it wishes to maximize a criterion depending on the lifelong utility of agents, is there a natural weight for the utility of the current old? We show in a simple example that this weight depends on the specific features of the model, in particular the length of the horizon, and cannot be chosen arbitrarily. Our result has a neat economic interpretation [2].
The Human Nuclear Poly(A)-Binding Protein Promotes RNA Hyperadenylation and Decay
Stefan M. Bresson,Nicholas K. Conrad
PLOS Genetics , 2013, DOI: 10.1371/journal.pgen.1003893
Abstract: Control of nuclear RNA stability is essential for proper gene expression, but the mechanisms governing RNA degradation in mammalian nuclei are poorly defined. In this study, we uncover a mammalian RNA decay pathway that depends on the nuclear poly(A)-binding protein (PABPN1), the poly(A) polymerases (PAPs), PAPα and PAPγ, and the exosome subunits RRP6 and DIS3. Using a targeted knockdown approach and nuclear RNA reporters, we show that PABPN1 and PAPα, redundantly with PAPγ, generate hyperadenylated decay substrates that are recognized by the exosome and degraded. Poly(A) tail extension appears to be necessary for decay, as cordycepin treatment or point mutations in the PAP-stimulating domain of PABPN1 leads to the accumulation of stable transcripts with shorter poly(A) tails than controls. Mechanistically, these data suggest that PABPN1-dependent promotion of PAP activity can stimulate nuclear RNA decay. Importantly, efficiently exported RNAs are unaffected by this decay pathway, supporting an mRNA quality control function for this pathway. Finally, analyses of both bulk poly(A) tails and specific endogenous transcripts reveals that a subset of nuclear RNAs are hyperadenylated in a PABPN1-dependent fashion, and this hyperadenylation can be either uncoupled or coupled with decay. Our results highlight a complex relationship between PABPN1, PAPα/γ, and nuclear RNA decay, and we suggest that these activities may play broader roles in the regulation of human gene expression.
Enhanced Lasso Recovery on Graph
Xavier Bresson,Thomas Laurent,James von Brecht
Computer Science , 2015,
Abstract: This work aims at recovering signals that are sparse on graphs. Compressed sensing offers techniques for signal recovery from a few linear measurements and graph Fourier analysis provides a signal representation on graph. In this paper, we leverage these two frameworks to introduce a new Lasso recovery algorithm on graphs. More precisely, we present a non-convex, non-smooth algorithm that outperforms the standard convex Lasso technique. We carry out numerical experiments on three benchmark graph datasets.
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