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Artykuły w czasopismach na temat "Strong localisation"
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Kumar, S., i P. Majumdar. "Anti-localisation to strong localisation: The interplay of magnetic scattering and structural disorder". Europhysics Letters (EPL) 65, nr 1 (styczeń 2004): 75–81. http://dx.doi.org/10.1209/epl/i2003-10056-8.
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Acharya, D., S. Singha Roy, K. Khoshelham i S. Winter. "MODELLING UNCERTAINTY OF SINGLE IMAGE INDOOR LOCALISATION USING A 3D MODEL AND DEEP LEARNING". ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences IV-2/W5 (29.05.2019): 247–54. http://dx.doi.org/10.5194/isprs-annals-iv-2-w5-247-2019.
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<p><strong>Abstract.</strong> Many current indoor localisation approaches need an initial location at the beginning of localisation. The existing visual approaches to indoor localisation perform a 3D reconstruction of the indoor spaces beforehand, for determining this initial location, which is challenging for large indoor spaces. In this research, we present a visual approach for indoor localisation that is eliminating the requirement of any image-based reconstruction of indoor spaces by using a 3D model. A deep Bayesian convolutional neural network is fine-tuned with synthetic images generated from a 3D model to estimate the camera pose of real images. The uncertainty of the estimated camera poses is modelled by sampling the outputs of the Bayesian network fine-tuned with synthetic images. The results of the experiments indicate that a localisation accuracy of 2 metres can be achieved using the proposed approach.</p>
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Kling, M. F., Ch Siedschlag, I. Znakovskaya, A. J. Verhoef, S. Zherebtsov, F. Krausz, M. Lezius i M. J. J. Vrakking. "Strong-field control of electron localisation during molecular dissociation". Molecular Physics 106, nr 2-4 (luty 2008): 455–65. http://dx.doi.org/10.1080/00268970701864739.
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Saeedvand, Saeed, Seyed Naser Razavi i Hadi S. Aghdasi. "Localisation and Pre-calculation for Anti-missile Defence Shield System". Defence Science Journal 66, nr 1 (27.01.2016): 37. http://dx.doi.org/10.14429/dsj.66.8831.
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<p>One of the most important problems in anti-missile systems is localisation ambulatory missiles’ defence sites along with fixed missiles’ defence sites in best positions to destroy enemy’s missiles. For localisation, there are lots of constraints and consumptions, which should be considered to making predictions in missiles behaviours. An optimum algorithm for localisation of the missiles’ defence sites is provided. Predictions of attackers’ missiles behaviors for assisting real-time defending operations in the defender sites is also provided. One simulator for finding the best places to locate ambulatory missiles’ defence sites presented. This simulator considers fixed and ambulatory missiles’ defence sites along with their parameters to provide best solutions by relying on modified genetic algorithm.</p><p><strong>Defence Science Journal, Vol. 66, No. 1, January 2016, pp. 37-43, DOI: http://dx.doi.org/10.14429/dsj.66.8831</strong></p>
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Hoppenot, Philippe, Etienne Colle i Christian Barat. "Off-line localisation of a mobile robot using ultrasonic measurements". Robotica 18, nr 3 (maj 2000): 315–23. http://dx.doi.org/10.1017/s0263574799002180.
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Regarding assistance to disabled people for object manipulation and carrying, the paper focuses on the localisation for mobile robot autonomy. In order to respect strong low-cost constraints, the perception system of the mobile robot uses sensors of low metrological quality, ultrasonic ring and odometry. That poses new problems for localisation, in particular. Among different localisation techniques, we present only off-line localisation. With poor perception means, it is necessary to introduce a priori knowledge on sensors and environment models. To solve the localisation problem, the ultrasonic image is segmented applying the Hough transform, well-adapted to ultrasonic sensor characteristics. The segments are then matched with the room, modelled and assumed to be rectangular. Several positions are found. A first sort, based on a cost function, reduces the possibilities. The remaining ambiguities are removed by a neural network which plays the part of a classifier detecting the door in the environment. Improvements of the method are proposed to take into account obstacles and non-rectangular room. Experimental results show that the localisation operates even with one obstacle.
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Besstrashnov, V. M., i A. L. Strom. "Active faults crossing trunk pipeline routes: some important steps to avoid disaster". Natural Hazards and Earth System Sciences 11, nr 5 (17.05.2011): 1433–36. http://dx.doi.org/10.5194/nhess-11-1433-2011.
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Abstract. Assessment of seismic strong motion hazard produced by earthquakes originating within causative fault zones allows rather low accuracy of localisation of these structures that can be provided by indirect evidence of fault activity. In contrast, the relevant accuracy of localisation and characterisation of active faults, capable of surface rupturing, can be achieved solely by the use of direct evidence of fault activity. This differentiation requires strict definition of what can be classified as "active fault" and the normalisation of methods used for identification and localisation of active faults crossing oil and natural gas trunk pipelines.
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Elgart, Alexander, i Sasha Sodin. "The trimmed Anderson model at strong disorder: localisation and its breakup". Journal of Spectral Theory 7, nr 1 (2017): 87–110. http://dx.doi.org/10.4171/jst/156.
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Elola, María T., Marcelo O. Cabada, Gustavo A. Barisone i Nilda E. Fink. "Immunohistochemical localisation of a galectin from Bufo arenarum ovary". Zygote 6, nr 1 (luty 1998): 1–9. http://dx.doi.org/10.1017/s0967199400005025.
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SummaryGalectins are a group of soluble animal lectins that exhibit specificity for β-galactosides and conserve sequence homology in the carbohydrate-recognition domain. The galectin from Bufo arenarum ovary showed a strong cross-reaction with the lectin of 14.5 kDa purified from embryos at early blastula stage. In this paper, we studied the immunohistochemical localisation of the galectin of 14.5 kDa from ovary of the toad B. arenarum in adult ovary sections. We also analysed the immunohistochemical localisation of the embryonic lectin during early development using the antiserum anti-ovary galectin. In the ovary, oocytes in the previtellogenic stage showed strong reactivity in the nucleus and the cortex but not in the cytoplasm. Oocytes in the stage of primary vitellogenesis exhibited a similar pattern in the nuclear and cortical areas but showed immunostaining in the cytoplasm. Intense nuclear staining was detected in oocytes in the stage of late vitellogenesis and in mature oocytes, which also presented strong reactions in the yolk platelets that completely covered the cytoplasm. In blastula embryos the staining was found in the blastomeres, the yolk platelets and the blastocoele. Each lectin localisation is discussed in relation to potential biological roles in the corresponding tissues.
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Botti, Valentina, Lorena Urbanelli, Krizia Sagini, Luigi Tarpani, Alessio Cesaretti, Cosimo G. Fortuna i Fausto Elisei. "Quaternized styryl-azinium fluorophores as cellular RNA-binders". Photochemical & Photobiological Sciences 19, nr 3 (2020): 362–70. http://dx.doi.org/10.1039/c9pp00465c.
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Kumar, S., i P. Majumdar. "Transport and localisation in the presence of strong structural and spin disorder". European Physical Journal B 46, nr 2 (lipiec 2005): 237–49. http://dx.doi.org/10.1140/epjb/e2005-00249-5.
Pełny tekst źródłaRozprawy doktorskie na temat "Strong localisation"
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Bellando, de Castro Louis. "Localisation de la lumière et effets coopératifs dans des nuages d'atomes froids". Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-00988897.
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Ce travail de thèse présente une étude numérique et théorique de l'influence des effets coopératifs sur la localisation de la lumière dans des vapeurs atomiques, suivie d'une étude expérimentale de ces effets coopératifs dans le régime de diffusion multiple dans des nuages d'atomes froids dilués. Le premier chapitre décrit le modèle que nous utilisons, basé sur l'Hamiltonien effectif d'interaction matière rayonnement, afin d'étudier numériquement la localisation de la lumière et les effets coopératifs. Nous discutons également des différences fondamentales existant entre la situation réelle où la lumière est assimilée à une onde vectorielle et l'approximation scalaire plus facile à traiter analytiquement. Le deuxième chapitre se concentre sur la présentation des résultats numériques complétée d'une comparaison systématique entre les cas scalaire et vectoriel. Nous remarquons dans cette partie que l'approximation scalaire, valable dans la limite des milieux spatialement dilués, présente des différences drastiques avec le cas vectoriel lorsque nous considérons des milieux spatialement denses. Nous n'observons pas également d'indications suffisantes nous permettant de discriminer le fait que les effets coopératifs ne soient pas à la base des mécanismes de localisation de la lumière. Dans la dernière partie nous nous intéressons expérimentalement aux signatures des effets coopératifs dans le régime de diffusion multiple en confrontant à nos résultats expérimentaux plusieurs approches théoriques tenant compte ou pas des effets d'interférences.
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Balestra, Julien. "Caractérisation de la source des séismes par inversion des données sismologiques et géodésiques : mécanismes au foyer, optimisation des modèles de vitesse, distribution du glissement cosismique". Thesis, Université Côte d'Azur (ComUE), 2017. http://www.theses.fr/2017AZUR4020/document.
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La caractérisation de la source d’un séisme se fait à partir de l’analyse des mesures des déplacements transitoires et statiques du sol, et dépend de la quantité et de la qualité de ces mesures. Nous avons travaillé sur la détermination des mécanismes au foyer des répliques du séisme de Saintes (MW 6.4, 2004), et sur la détermination de la distribution spatio-temporelle du glissement cosismique des séismes de L’Aquila (Mw 6.3, 2009), et de Miyagi-Oki (Mw 7.2, 2005) et de Sanriku-Oki (Mw 7.3, 2011). Ces travaux se sont basés sur des méthodes d’inversions, et différents jeux de données (accélérométriques, large-bandes, GPS et InSAR) accessibles ou non selon le séisme considéré. La seule diversité des mesures n’est pas suffisante pour décrire la rupture. La modélisation des données se confronte à des difficultés, comme par exemple la pertinence des modèles de vitesses sismiques pour la modélisation des données accélérométriques. Une autre problématique récurrente est la non-unicité de la meilleure solution déterminée par les méthodes d’inversions pour décrire les données. Pour répondre à ces deux problématiques, nous avons d‘une part développé une procédure d’exploration de modèles de vitesse pour déterminer les valeurs optimales capables de décrire au mieux les données accélérométriques du séisme de L’Aquila. D’autre part, nous avons développé une procédure de construction d’un modèle de source moyen que nous avons appliqué pour la détermination du glissement cosismique des séismes de L’Aquila, de Miyagi-Oki, et de Sanriku-Oki. L’ensemble de ces travaux et les réponses aux problèmes soulevés sont présentés dans ce travail de thèseStudies of the earthquake source are based on observations of seismic ground motions. They also depend on the quality and the density of measurements. In this present work we will present studies of the determination of focal mechanism of main aftershocks of the Les Saintes (MW 6.4, 2004) earthquake, and the determination of the coseismic slip of the L’Aquila (MW 6.3, 2009), the Miyagi-Oki (MW 7.2, 2005), ant the Sanriku-Oki (MW 7.3, 2011) earthquakes. These studies were based on two inversion methods. Different kinds of data were available (strong motion, broadband teleseismic, GPS and InSAR) depending on the earthquake studied. But the multiplicity of data is not sufficient to well describe rupture process. There are others difficulties as the data modeling of strong motion. Seismic velocity models are used to describe the characteristics of layers crossed by seismic waves. The quality of the modeling is depending on the pertinence of these seismic velocity models. The description of the rupture process is also depending on the non-uniqueness of the best solution given by global inversion methods. We propose two procedures in order to take into account these two classic issues. First, we developed a velocity model exploration procedure to obtain optimized 1D velocity models in order to improve the strong motion modeling of the L’Aquila earthquake. Then we developed a procedure to build an average rupture model from the combined results of several joint inversions, which was applied to the L’Aquila, the Miyagi-Oki, and the Sanriku-Oki earthquake. This thesis presents all these works and answers to the raised issues
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Ruess, Frank Joachim Physics Faculty of Science UNSW. "Atomically controlled device fabrication using STM". Awarded by:University of New South Wales. Physics, 2006. http://handle.unsw.edu.au/1959.4/24855.
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We present the development of a novel, UHV-compatible device fabrication strategy for the realisation of nano- and atomic-scale devices in silicon by harnessing the atomic-resolution capability of a scanning tunnelling microscope (STM). We develop etched registration markers in the silicon substrate in combination with a custom-designed STM/ molecular beam epitaxy system (MBE) to solve one of the key problems in STM device fabrication ??? connecting devices, fabricated in UHV, to the outside world. Using hydrogen-based STM lithography in combination with phosphine, as a dopant source, and silicon MBE, we then go on to fabricate several planar Si:P devices on one chip, including control devices that demonstrate the efficiency of each stage of the fabrication process. We demonstrate that we can perform four terminal magnetoconductance measurements at cryogenic temperatures after ex-situ alignment of metal contacts to the buried device. Using this process, we demonstrate the lateral confinement of P dopants in a delta-doped plane to a line of width 90nm; and observe the cross-over from 2D to 1D magnetotransport. These measurements enable us to extract the wire width which is in excellent agreement with STM images of the patterned wire. We then create STM-patterned Si:P wires with widths from 90nm to 8nm that show ohmic conduction and low resistivities of 1 to 20 micro Ohm-cm respectively ??? some of the highest conductivity wires reported in silicon. We study the dominant scattering mechanisms in the wires and find that temperature-dependent magnetoconductance can be described by a combination of both 1D weak localisation and 1D electron-electron interaction theories with a potential crossover to strong localisation at lower temperatures. We present results from STM-patterned tunnel junctions with gap sizes of 50nm and 17nm exhibiting clean, non-linear characteristics. We also present preliminary conductance results from a 70nm long and 90nm wide dot between source-drain leads which show evidence of Coulomb blockade behaviour. The thesis demonstrates the viability of using STM lithography to make devices in silicon down to atomic-scale dimensions. In particular, we show the enormous potential of this technology to directly correlate images of the doped regions with ex-situ electrical device characteristics.
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Sarkis, Matthieu. "Compactifications hétérotiques avec flux". Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066074/document.
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Nous étudions différents aspects liés aux compactifications hétérotiques avec torsion. Nous définissons et calculons le genre elliptique vêtu associé aux compactifications Fu-Yau, et exploitons ce résultat pour calculer les corrections de seuil à une boucle de différents couplages BPS-saturés dans l’action effective de supergravité à quatre dimen- sions. Enfin nous nous intéressons à des solutions supersymétriques non-compactes qui généralisent, entre autres, les solutions hétérotiques connues sur le conifoldWe study various aspects of heterotic compactifications with torsion. We de- fine and compute the dressed elliptic genus associated to Fu-Yau compactifications, and use this result to compute one-loop threshold corrections to various BPS-saturated cou- plings in the four-dimensional effective supergravity action. Finally, we study non-compact supersymmetric solutions which generalize, among others, the known heterotic solutions on the conifold
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Moriceau, Lucille. "Caractérisation de la protéine 140K impliquée dans l’adressage aux chloroplastes des complexes de réplication du virus de la mosaïque jaune du navet (TYMV)". Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLS255/document.
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Le virus de la mosaïque jaune du navet (TYMV) possède un génome monopartite constitué d’ARN de polarité positive codant pour trois protéines, dont seule la polyprotéine 206K est indispensable à la réplication virale.Elle subit une maturation protéolytique, générant les protéines 140K et 66K, localisées au niveau de l’enveloppe des chloroplastes, siège de la réplication virale.Adressée aux chloroplastes, la protéine 140K y recrute la 66K et se comporte comme une protéine intégrale membranaire.Le domaine d’adressage aux chloroplastes (DAC) de la protéine 140K a été défini grâce à la transfection et à des protoplastes d’Arabidopsis thaliana par différentes constructions codantpour des versions délétées de la protéine fusionnées à l’EGFP, et à leur observation en microscopie confocale. Le DAC comprend deux hélices alpha amphipathiques dont la présence a été attestée par dichroïsme circulaire. Leur nécessité pour la localisation aux chloroplastes, l’association aux membranes et la réplication virale, a été étudiée. Différents patterns de distribution subcellulaire de la protéine 140K ont été observés. Ils sont corrélés au taux d’expression de la protéine. Sa dimérisation a également été démontrée.L’implication d’autres résidus du DAC dans la localisation subcellulaire, la dimérisation et la réplication virale, a également été recherchéeTurnip yellow mosaic virus (TYMV) is a positive single-stranded RNA virus. Among the three ORFs encoded by the TYMV genome, 206K is the only protein required for viral replication. It is cleaved into 140K and 66K, which are both present at the chloroplast envelope membrane, where viral replication takes place.The 140K protein is targeted to chloroplasts, where it recruits 66K, and behaves as an integral membrane protein. The chloroplast targeting domain (DAC) of the 140K protein was defined using Arabidopsis thaliana protoplasts transfected by various constructs encoding deleted versions of 140Kfused to EGFP and subsequent confocal microscopy. The DAC comprises two amphipathic alpha helices, as confirmed by circular dichroism. Their involvement in chloroplast localisation and membrane association has been assessed, as well as their contribution to viral replication.We observed different subcellular distribution patterns of 140K protein, which correlate with the expression level of the protein. Its capability to dimerize has also been demonstrated.The involvement of other DAC residues in subcellular localisation, dimerization and viral replication has been studied
Części książek na temat "Strong localisation"
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Borja, Ronaldo I. "On the post-localization behavior of elasto-plastic solids with strong discontinuity". W Bifurcation and Localisation Theory in Geomechanics, 13–19. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003210931-3.
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Powell, Martin. "Coalition health policy: a game of two halves or the final whistle for the NHS?" W Social Policy Review 28. Policy Press, 2016. http://dx.doi.org/10.1332/policypress/9781447331797.003.0002.
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This chapter contains an analysis of the development of the NHS under the Coalition Government. While some argue that under the Coalition Government the UK approaches the end of the NHS, the analysis shows that the reforms initiated by the Coalition Government have diverging directions and diverging ideological foundations. Whereas in the first part of the Coalition Government’s rule merely competition, privatization and marketization dominated the debate, the second part stills carries the heritages of the neo-liberal paradigm but also introduces other measures to improve the performance of the NHS and guarantee its financial sustainability: prevention, integration and localisation. But the question is if these initiatives are strong enough to guarantee a bright future for the NHS.
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Güler, Hüseyin, i Erkan Erdil. "Does Participation in International R&D Networks Enhance Local Dynamism?" W Handbook of Research on Cultural and Economic Impacts of the Information Society, 203–32. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8598-7.ch009.
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This chapter which is in line with the global pipelines-local buzz framework addresses the collaboration dynamics of ICT researchers from universities of an emerging economy who are mostly benefiting from national funds and do not have dominating or core roles in international R&D networks. It provides a novel taxonomy to identify the degree of globalisation versus localisation of ICT scientists in Turkey. Based on international and national project portfolios of Turkish ICT researchers who participated in FP6 and other international projects between 2003 and 2006, four groups (gatekeepers, externally oriented researchers, internally oriented researchers, inactive researchers) were formed in terms of their degree of local or global focus. For the period of 2007–2013, the performance of the same population was traced with respect to its international or national project density, publication output, involvement in decision making processes on academic project funding, and contribution to R&D capacity development in the private sector. Findings show that that most of the researchers who are engaged in international collaboration are also locally active and they seem to be the most productive actors within the four groups. The study also implies that having a strong project portfolio at both national and international levels relates to having a work experience abroad after the PhD fulfilment and being at a university with advanced research ecosystem in Turkey. This chapter concludes with key policy recommendations, highlighting the need on moving beyond one-size-fits-all policies which should take in to account the heterogeneity, differentiation on career levels, national priorities and capacity requirements of the research ecosystem.
Streszczenia konferencji na temat "Strong localisation"
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Forciniti, Carmen, Laura Eboli, Gabriella Mazzulla i Francisco Calvo. "Exploring the Factors that Impact on Transit Use through an Ordered Probit Model: the Case of Metro of Madrid". W CIT2016. Congreso de Ingeniería del Transporte. Valencia: Universitat Politècnica València, 2016. http://dx.doi.org/10.4995/cit2016.2016.3205.
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The configuration of urban areas is the result of a cyclic relationship between land use and transportation system: the changes in transportation system arrangements influence the localisation of residence and economic activities, as well as the changes in land use affect transportation system characteristics. In this context, by operating on land use, travel demand can be shift from the individual transportation modes to transit systems. In the literature, many conceptual models were proposed to describe the complex relationship between land use and travel behaviour. In addition to spatial variation, the study of travel demand shows the categorical variation of variables. This work aims to analyse the influence of the categorical variation of variables impacting on transit use. An ordered probit model is proposed for evaluating how transit use depends on variables related to socio-economic characteristics of population, territorial features, accessibility, and transportation system. The study case is Madrid metro network (Spain). The results show a strong influence of characteristics of population and land use variables on daily trips made using metro system and highlighted the aspects that mainly impact on the choice to travel by metro, providing useful suggestions for shifting people from individual transportation mode to transit systems.DOI: http://dx.doi.org/10.4995/CIT2016.2016.3205
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Troiani, Francesco, Nadia Cherubini, Alessandro Dodaro, Franco Vittorio Frazzoli i Romolo Remetti. "L/ILW Waste Characterisation by the ENEA Multi-Technique Gamma System SRWGA". W ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4730.
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The SEA Radioactive Waste Gamma Analyser (SRWGA), is the gamma assay system of the ENEA Laboratory for L/ILW Waste Characterisation, which started operating in 1996 as a simple gamma scanner and has been under a continuous improvement process to became a multi-techniques system. The SRWGA is designed for the assay of radioactive waste drums containing gamma emitting nuclides. The system operates with an XtRa (extended range) Ge coaxial detector. This is liquid nitrogen colled, and shielded by means of a lead cylinder with two collimation windows; one mixed transmission source is provided. The system allows the application of four different measuring techniques, each one with its peculiar field of application, depending on waste characteristics or measuring time: Open Geometry, Segmented Gamma Scanning (with multi-energy transmission correction), Angular Scanning and, recently, Low Resolution Emission and Transmission Tomography, as the SRWGA is now endowed with new mechanical motions systems for tomographic capabilities. Tomographic reconstructions are obtained by means of a backprojection filtered by convolution methods (for transmission tomography) and Best Likelihood Maximisation (for emission tomography). The information obtained with transmission and emission tomography allows the localisation of matrix dishomogeneities and hot spots, carrying out a strong reduction of total activity uncertainties. This work presents the experimental results obtained using certified γ sources located in known matrices.
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Faidy, Claude. "Comparison and Harmonization of French RCCM and ASME Code". W 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29773.
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The objectives of this paper is to discuss technical harmonization of Nuclear Codes and Standards, based on French long experience in Codes and Standards used for design-fabrication and operation of nuclear components (mainly pressure retaining components). After a long period of use of ASME Section III code, during the Westinghouse licensing process, AFCEN (AREVA, EDF and the major manufacturers) decided to develop their own AFCEN French Codes. The 1st version has been issued in 1980 and the last one in 2007, completed by annual addendum. During more than 20 years the 2 Codes, RCCM and ASME Section III, have leave separately, with different constraints like industrial history, localisation of fabrication, more new plants in France than in USA, different R&D programs to support Code improvement… Recently a detailed review of differences for class 1 vessel has showed under a “general global quality equivalence”, a lot of differences in the Code development process, in the Code organization, in the scopes, in the State of the Art fulfillment, in ageing consideration at the design stage, in relation with national or international regulations, in term of standards used or complementary specification needs… The harmonization of Codes and Standards is possible under an important effort to move toward new ideas, more international rules and with a strong support of national safety authorities.
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Faidy, Claude. "International Harmonisation: A Key Challenge for Mechanical Components Codes and Standards". W ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97968.
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Many Code Comparisons have been done by different organizations. The differences are better and better known by Code Development Organizations like ASME, AFCEN, JSME, KEPIC, CSA and NIKIET. This paper uses the last MDEP (Multinational Design Evaluation Program) comparison for class 1 components to classify differences in different aspects: - National regulatory requirements - Technical differences - Scope differences. Few examples are selected to confirm needs of harmonization in different areas like: documentation, design rules, materials, product specifications, welding and non destructive examination personal qualifications. The paper concludes on selected topics proposed for harmonization by AFCEN. The objectives of this paper is to discuss technical harmonization of Nuclear Codes and Standards, based on French long experience in Codes and Standards used for design-fabrication and operation of nuclear components (mainly pressure retaining components). After a long period of use of ASME Section III code, during the Westinghouse licensing process, AFCEN (AREVA, EDF and the major manufacturers) decided to develop their own AFCEN French Codes. The 1st version has been issued in 1980 and the last one in 2007, completed by annual addendum. During more than 20 years the 2 Codes, RCC-M and ASME Section III, have leave separately, with different constraints like industrial history, localisation of fabrication, more new plants in France than in USA, different R&D programs to support Code improvement… Recently a detailed review of differences for class 1 vessel has showed under a “general global quality equivalence”, a lot of differences in the Code development process, in the Code organization, in the scopes, in the State of the Art fulfillment, in ageing consideration at the design stage, in relation with national or international regulations, in term of standards used or complementary specification needs… The harmonization of Codes and Standards is possible under an important effort to move toward new ideas, more international rules and with a strong support of national safety authorities.
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Boisseau, M. R., J. Bonnet, G. Freyburger, P. Desbordes, L. Brottier, J. M. Orgogozo i H. Bricaud. "HEMOSTASIS AND HEMORHEOLOGY AFTER ISCHEMIC STROKE IN PATIENTS WITHOUT CARDIOPATHY AND OTHER LOCALISATION OF ATHEROSCLEROSIS". W XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644210.
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Hemorheological parameters (whole blood filtration, whole blood viscosity, plasma viscosity and erythrocyte deformability by ektacytometry) and fibrinolysis parameters (Euglobulin Lysis Time ELT, t-PA activity, and Plasminogen ActivatorInhibitor -PAI- before and after Venous Occlusion Test -VOT-) were measured in 20 stroke patients. All these patients had a crerebrovascular accident (CVA) localised to the carotid arterial tree. They has no signs of heart disease and were without risk factors for atherosclerosis (high blood pressure, diabetes) ; they were investigated in the week following the CVA. They were divided into 4 groups : 1/ transcient ischemic accident, 2,3,4/ size of infarct classified from results of C. T. Scan carried out 2 or 3 days after the stroke (2/small +, 3/moderate ++, 4/large +++).For the hemorheological parameters we noted only a slight increase in whole blood filtration (27±8“ vs 21±2”, p<0,05).The ELT was however significantly increased in these patients (258 ±57 min. vs 133 ±33,p<0,001)suggesting impairement of fibrinolysis. The following points were noteworthy : the ELT return to normal after to VOT,there was a relationship between stroke severity and the PAI levels and the viscosity at low shear stress. These two parameters were dramatically impaired in the most severely affected patients. Transcient ischemic accidents had comparable features to the CVA of moderate size.The extend of the disorders of the hemorheological disorders and the abnormalities in fibrinolysis seemed to be related to the severity of the involvement in patients with ischemic stroke with no evidence of heart disease or atherosclerosis in other systems.
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de Cidrac, L., L. Radoï, R. Pecorari i T. Nguyen. "Tumeur à cellules géantes : à propos d’un cas récidivant et agressif à localisation mandibulaire". W 66ème Congrès de la SFCO. Les Ulis, France: EDP Sciences, 2020. http://dx.doi.org/10.1051/sfco/20206603021.
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Introduction : La tumeur à cellules géantes (TCG) est une lésion osseuse qui se développe préférentiellement au niveau de l’épiphyse des os longs chez des sujets de 20 à 40 ans, mais exceptionnellement au niveau des maxillaires. D’étiologie inconnue, elle fait partie du groupe des tumeurs osseuses bénignes. Ce groupe nosologique comprend le granulome central à cellules géantes (GCCG), le chérubisme, le kyste anévrismal ainsi que les TCG et les tumeurs brunes liées à l’hyperthyroïdie. L’histologie ne permet pas de poser un diagnostic de certitude entre la TCG et le GCCG. Cependant, les TCG présentent un tableau clinique plus agressif et récidivant. Il existe un risque de transformation maligne en sarcome dans 10 à 20% des cas (Barthélemy 2009) et un fort potentiel métastatique (Martin-Duverneuil 2004). Observation : Le cas rapporté est celui d’une patiente de 28 ans qui présentait une tuméfaction intrabuccale douloureuse de 35mm de grand axe, en distal de 47. Le Cone Beam (CBCT) montrait une lésion osseuse radioclaire sous-jacente de 22mm de grand axe, à proximité d’un apex résiduel de 48. Le diagnostic initial était celui d’un kyste résiduel compliqué d’une cellulite. Le traitement a consisté en une énucléation simple. L’examen anatomopathologique suspectait un granulome périphérique à cellules géantes (GPCG) avec atteinte osseuse. La patiente a été perdue de vue 4 mois jusqu’à la récidive de la lésion. Le nouveau CBCT montrait une lésion ostéolytique de 40mm de grand axe, au niveau de l’angle mandibulaire, envahissant la branche montante avec perforation des corticales et atteinte des tissus mous. Une chirurgie interruptrice mandibulaire en marges saines avec reconstruction par attelle en titane préformée a été réalisée. L’examen anatomopathologique de la pièce d’exérèse n’a pas pu conclure entre GCCG et TCG. La patiente a été suivie 2 ans sans récidive. Discussion : Contrairement au GPCG, le GCCG et la TCG se développent d’abord dans l’os spongieux puis de manière excentrique jusqu’aux corticales osseuses qui peuvent être détruites et aux tissus mous qui sont refoulés ou envahis. Le contenu est mou, de couleur brun-rouge, parfois vacuolaire ou hémorragique. L’examen histologique montre un stroma assez homogène, très vasculaire, contenant, à côté de cellules mononuclées, de grandes cellules multinucléées : les cellules géantes. Le nombre de noyaux serait corrélé avec l’agressivité de la tumeur (Ficarra 1987). Moins fréquente que le GCCG, la TCG est plus agressive. Elle récidive dans environ 50% des cas. La recommandation actuelle est de la traiter par exérèse chirurgicale réglée avec des limites histologiques saines. Le curetage est insuffisant pour prévenir le risque de récidive et de transformation maligne (Barthélémy 2009). Dans le cas rapporté, la forme particulièrement agressive de la tumeur chez cette jeune patiente (récidive en 4 mois avec perforation des corticales et envahissement des parties molles) nous a orienté vers le diagnostic de TCG et un traitement radical de sa récidive. Conclusion : La TCG nécessite un diagnostic précoce et une exérèse en marges saines dès la première intervention afin de diminuer le risque de récidive et d’éviter des traitements plus mutilants.