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1. Experimental observation of ultrasound fast and slow waves through three-dimensional printed trabecular bone phantoms

Author

Fabien Mézière, Renaud Boistel, Arnaud Derode, Petra Jusková, Laurent Malaquin, Marie Muller, Emmanuel Bossy, J. Woittequand, Institut Langevin - Ondes et Images (UMR7587) (IL), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Physico-Chimie-Curie (PCC), Centre National de la Recherche Scientifique (CNRS)-Institut Curie [Paris]-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC), Département Electronique et Physique (EPH), Institut Mines-Télécom [Paris] (IMT)-Télécom SudParis (TSP), Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut International de Paléoprimatologie, Paléontologie Humaine : Evolution et Paléoenvironnement (IPHEP), Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers, Institut Langevin ondes et images, Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-ESPCI ParisTech-Centre National de la Recherche Scientifique (CNRS), Physique des ondes pour la médecine, Université Paris Diderot - Paris 7 (UPD7)-ESPCI ParisTech-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut Curie [Paris], Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Curie [Paris]-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Département Electronique et Physique (TSP - EPH), and Université de Poitiers-Centre National de la Recherche Scientifique (CNRS)

Subjects
medicine.medical_specialty, Materials science, Time Factors, Acoustics and Ultrasonics, [SDV.BID]Life Sciences [q-bio]/Biodiversity, 01 natural sciences, 030218 nuclear medicine & medical imaging, law.invention, 03 medical and health sciences, Motion, 0302 clinical medicine, Arts and Humanities (miscellaneous), law, 0103 physical sciences, Image Interpretation, Computer-Assisted, medicine, PHASE CONTRAST IMAGING, Animals, Medical physics, BONE MICROARCHITECTURE, Femur, Horses, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 010301 acoustics, Stereolithography, ComputingMilieux_MISCELLANEOUS, Ultrasonography, business.industry, Phantoms, Imaging, PHASE CONTRAST MICROTOMOGRAPHY, Ultrasound, Equipment Design, X-Ray Microtomography, Synchrotron, Trabecular bone, Ultrasonic Waves, FRELON CAMERA, Printing, Three-Dimensional, business, Epiphyses, Software, Synchrotrons, Biomedical engineering
Abstract

International audience; In this paper, ultrasound measurements of 1:1 scale three-dimensional (3D) printed trabecular bone phantoms are reported. The micro-structure of a trabecular horse bone sample was obtained via synchrotron x-ray microtomography, converted to a 3D binary data set, and successfully 3D-printed at scale 1:1. Ultrasound through-transmission experiments were also performed through a highly anisotropic version of this structure, obtained by elongating the digitized structure prior to 3D printing. As in real anisotropic trabecular bone, both the fast and slow waves were observed. This illustrates the potential of stereolithography and the relevance of such bone phantoms for the study of ultrasound propagation in bone.

Published
2016
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2. Optical Transimpedance Receiver for High Data Transmission in OFDM Modulation Format

Author

Frederique Deshours, Georges Alquie, Ghalid Idir Abib, Emmanuel Grard, Victor Rodrigues, Eric Leclerc, Ali Kabalan, Anne-Laure Billabert, Laboratoire d'Electronique et Electromagnétisme (L2E), Université Pierre et Marie Curie - Paris 6 (UPMC), Département Electronique et Physique (TSP - EPH), Institut Mines-Télécom [Paris] (IMT)-Télécom SudParis (TSP), 3S Photonics, United Monolithic Semiconductors (UMS), Electronique, Systèmes de communication et Microsystèmes (ESYCOM), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Université Paris-Est Marne-la-Vallée (UPEM)-ESIEE Paris, Département Electronique et Physique (EPH), and Université Paris-Est Marne-la-Vallée (UPEM)-ESIEE Paris-Conservatoire National des Arts et Métiers [CNAM] (CNAM)

Subjects
Transimpedance amplifier, Engineering, business.industry, Orthogonal frequency-division multiplexing, Optical link, 020208 electrical & electronic engineering, Electrical engineering, 02 engineering and technology, Optical performance monitoring, Optical modulation amplitude, Noise figure, Passive optical network, Atomic and Molecular Physics, and Optics, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, 020210 optoelectronics & photonics, Radio over fiber, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, business
Abstract

International audience; This paper presents the design and performance of a single-ended transimpedance amplifier (TIA) for gigabit passive optical networks (GPON) implementing orthogonal frequency division multiplexing (OFDM) modulation format. The circuit is realized using an industrial GaAs integrated technology. Low power consumption and small chip area are the main challenges in the TIA design. On-wafer characterization in terms of S-parameters, noise figure, gain compression and intermodulation are presented and compared to simulated results showing a good agreement. The TIA is linked with a broadband PIN photodiode and introduced in a radio over fiber (RoF) system. The optical link is simulated in a microwave software and characterized in terms of error vector magnitude (EVM) by varying the radio frequency (RF) input power and the laser bias current.

Published
2015
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3. A new protocol for multi-biometric systems' evaluation maintaining the dependencies between biometric scores

Author

Lorene Allano, Sonia Garcia-Salicetti, Bernadette Dorizzi, Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Département Electronique et Physique (EPH), Institut Mines-Télécom [Paris] (IMT)-Télécom SudParis (TSP), Services répartis, Architectures, MOdélisation, Validation, Administration des Réseaux (SAMOVAR), Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), and Département Electronique et Physique (TSP - EPH)

Subjects
Dependency (UML), Biometrics, Computer science, Chimeric" persons, Multibiometric scores' fusion, 020206 networking & telecommunications, 02 engineering and technology, Mutual information, computer.software_genre, Independency tests, Independency criteria, Clustering, Artificial Intelligence, Signal Processing, Performance evaluation, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Computer Vision and Pattern Recognition, Data mining, "Chimeric" persons, Cluster analysis, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, computer, Protocol (object-oriented programming), Software
Abstract

International audience; We address the problem of measuring the dependency of multibiometric systems' scores, using Kolmogorov-Smirnov and Mutual Information criteria, and studying the validity of performance evaluation on chimeric persons. On the NIST-BSSR1 database, we formalize a common assumption in the literature: for independent scores, multibiometric systems can be evaluated on "random chimeric" persons. We show that this is not valid for dependent scores and propose a novel protocol for building "cluster-based chimeric" persons maintaining the level of dependency between scores. Finally, we show that performance evaluation for dependent modalities on such persons is equivalent to that obtained on "real" persons.

Published
2012
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4. Ring-based PON supporting multiple optical private networks using OCDMA technique

Author

Steevy Cordette, Philippe Gallion, Catherine Lepers, Mohammad Gharaei, Ihsan Fsaifes, Laboratoire Traitement et Communication de l'Information (LTCI), Télécom ParisTech-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Département Electronique et Physique (EPH), Institut Mines-Télécom [Paris] (IMT)-Télécom SudParis (TSP), Services répartis, Architectures, MOdélisation, Validation, Administration des Réseaux (SAMOVAR), Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Département Electronique et Physique (TSP - EPH)

Subjects
Computer science, Throughput, 02 engineering and technology, Optical CDMA, 01 natural sciences, Passive optical network, 010309 optics, 020210 optoelectronics & photonics, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Optical line termination, Electrical and Electronic Engineering, Optical access networks, Network architecture, PON, Access network, business.industry, Code division multiple access, Ring network, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, 10G-PON, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, business, Telecommunications, Computer network
Abstract

International audience; This work is a novel attempt to provide local communications for multiple optical private networks (PNs) within ring-based passive optical network (PON). In order to improve network throughput performance, PNs traffic is decentralized from PON traffic let no extra traffic management into optical line terminal (OLT). To achieve multiple secure optical private networking over ring-based PON layout, optical code division multiple access (OCDMA) technique is applied. This technique leads to interconnect optical network units (ONUs) in the same PN sharing the same codeword while other PNs benefiting from different codewords. This scheme can be used in access networks to establish discrete communications between different sites in an enterprise or a university campus or even a residential accommodation. The proposed network architecture is then set up and its bit error rate performance is experimentally demonstrated. Finally, the network scalability and throughput performance of the proposed scheme are analyzed

Published
2010
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5. Thermal-Signature-Based Sleep Analysis Sensor

Author

Andrea Pinna, Dan Istrate, Ali Seba, Toufik Guettari, Patrick Garda, Adrien Ugon, Biomécanique et Bioingénierie (BMBI), Université de Technologie de Compiègne (UTC)-Centre National de la Recherche Scientifique (CNRS), Systèmes Electroniques (SYEL), Laboratoire d'Informatique de Paris 6 (LIP6), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Recherche et d'Innovation Technologique (ESIGETEL) (LRIT), Département Electronique et Physique (TSP - EPH), Institut Mines-Télécom [Paris] (IMT)-Télécom SudParis (TSP), and Département Electronique et Physique (EPH)

Subjects
medicine.medical_specialty, Computer science, Computer Networks and Communications, media_common.quotation_subject, 0206 medical engineering, 02 engineering and technology, Polysomnography, Electromyography, Audiology, Electroencephalography, thermopile sensor, actimetry, thermal camera, data classification, tele-medicine, polysomnography, 03 medical and health sciences, Muscle tone, 0302 clinical medicine, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, medicine, ComputingMilieux_MISCELLANEOUS, Simulation, media_common, Sleep Stages, lcsh:T58.5-58.64, medicine.diagnostic_test, Hypnogram, lcsh:Information technology, business.industry, Communication, biomedical_chemical_engineering, Electrooculography, 020601 biomedical engineering, Human-Computer Interaction, medicine.anatomical_structure, Sleep (system call), business, 030217 neurology & neurosurgery, Vigilance (psychology)
Abstract

This paper address the development of a new technic in the sleep analysis domain. Sleep is defined as a periodic physiological state during which vigilance is suspended and reactivity to external stimulations diminished. We sleep on average between six and nine hours per night and our sleep is composed of four to six cycles of about 90-minutes each. Each of these cycles is composed of a succession of several stages of sleep, more or less deep. The analysis of sleep is usually done using a polysomnography. This examination consists of recording, among other things, electrical cerebral activity by electroencephalography (EEG), ocular movements by electrooculography (EOG) and chin muscle tone by electromyography (EMG). The recording is done mostly in a hospital, more specifically in a service for monitoring the pathologies related to sleep. The readings are then interpreted manually by an expert to generate a hypnogram, a curve showing the succession of sleep stages during the night in 30-second epochs. The proposed method is based on the follow-up of the thermal signature that makes it possible to classify the activity into three classes: "awakening", "calm sleep" and "agitated sleep". The contribution of this non-invasive method is part of the screening of sleep disorders, to be validated by a more complete analysis of the sleep. The measure provided by this new system, based on temperature monitoring (patient and ambient), aims to be integrated into the tele-medicine platform developed within the framework of the Smart-EEG project by the SYEL - SYstèmes ELectroniques team. Analysis of the data collected during the first surveys carried out with this method showed a correlation between thermal signature and activity during sleep. The advantage of this method lies in its simplicity and the possibility of carrying out measurements of activity during sleep and without direct contact with the patient at home or hospitals.

Published
2017
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6. Optical Power Control in GMPLS Control Plane

Author

Djamel Amar, Bernard Cousin, Julien Meuric, Mohamad Kanj, Esther Le Rouzic, Institut de Recherche Technologique b-com (IRT b-com), Orange Labs [Lannion], France Télécom, Advanced technologies for operated networks (ADOPNET), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-RÉSEAUX, TÉLÉCOMMUNICATION ET SERVICES (IRISA-D2), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Université de Bretagne Sud (UBS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Rennes (ENS Rennes)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-CentraleSupélec-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Bretagne Sud (UBS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Rennes (ENS Rennes)-Centre National de la Recherche Scientifique (CNRS)-CentraleSupélec, Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Télécom Bretagne-RÉSEAUX, TÉLÉCOMMUNICATION ET SERVICES (IRISA-D2), CentraleSupélec-Télécom Bretagne-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Rennes (ENS Rennes)-Université de Bretagne Sud (UBS)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Télécom Bretagne-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Rennes (ENS Rennes)-Université de Bretagne Sud (UBS)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Département Electronique et Physique (EPH), Institut Mines-Télécom [Paris] (IMT)-Télécom SudParis (TSP), Services répartis, Architectures, MOdélisation, Validation, Administration des Réseaux (SAMOVAR), Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-IMT Atlantique (IMT Atlantique), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Télécom Bretagne-RÉSEAUX, TÉLÉCOMMUNICATION ET SERVICES (IRISA-D2), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Département Electronique et Physique (TSP - EPH)

Subjects
Multiwavelength optical networking, control plane, Engineering, Optical power budget, Computer Networks and Communications, Physics::Optics, 02 engineering and technology, Optical burst switching, 01 natural sciences, Passive optical network, RSVP-TE, 010309 optics, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], 020210 optoelectronics & photonics, OSPF-TE, Optical Transport Network, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, ComputingMilieux_MISCELLANEOUS, Optical communications repeater, Optical amplifier, business.industry, Optical performance monitoring, Flex-Grid, Optical link design, GMPLS, Optical power control, business, Computer network
Abstract

The exponential traffic growth in optical networks has triggered the evolution from fixed-grid to flex-grid technology. This evolution allows better spectral efficiency and spectrum usage over current optical networks in order to facilitate huge dynamic traffic demands. The promise of flex-grid technology in terms of increasing the number of optical channels established over optical links, however, may not be sustainable because of the associated increase in optical amplification power. In this work, we detail a power control process that takes advantage of link optical power and channel optical signal-to-noise ratio (OSNR) margins to allow network operators to support this optical power increase while maintaining the use of legacy optical amplifiers. New generalized multiprotocol label switching (GMPLS) protocol extensions are proposed on which to integrate the optical power control process in the control plane. The performance of the process is evaluated in terms of the blocking ratio and network throughput over fixed-grid and flex-grid networks. Results show that controlling optical power benefits from the flex-grid technology in terms of spectrum and capacity gain and reduces optical connection blocking.

Published
2016
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7. Neural Correlates of Learning in the Prefrontal Cortex of the Monkey: A Predictive Model

Author

Bernadette Dorizzi, Wolfram Schultz, Yves Burnod, Emmanuel Guigon, Action-Neuroimagerie-Modelisation (ANIM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Département Electronique et Physique (TSP - EPH), Institut Mines-Télécom [Paris] (IMT)-Télécom SudParis (TSP), Réseau National des Systèmes Complexes (RNSC), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CGE-CPU-Centre National de la Recherche Scientifique (CNRS), and Département Electronique et Physique (EPH)

Subjects
Time Factors, Computer science, Cognitive Neuroscience, Memorization, Task (project management), 03 medical and health sciences, Cellular and Molecular Neuroscience, 0302 clinical medicine, Animals, Learning, Prefrontal cortex, 030304 developmental biology, Motor Neurons, 0303 health sciences, Neural correlates of consciousness, Artificial neural network, Working memory, Macaca mulatta, Anticipation, Frontal Lobe, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Neural Networks, Computer, Consumer neuroscience, Neuroscience, Mathematics, 030217 neurology & neurosurgery, Cognitive psychology
Abstract

International audience; The principles underlying the organization and operation of the prefrontal cortex have been addressed by neural network modeling. The involvement of the prefrontal cortex in the temporal organization of behavior can be defined by processing units that switch between two stable states of activity (bistable behavior) in response to synaptic inputs. Long-term representation of programs requiring short-term memory can result from activity-dependent modifications of the synaptic transmission controlling the bistable behavior. After learning, the sustained activity of a given neuron represents the selective memorization of a past event, the selective anticipation of a future event, and the predictability of reinforcement. A simulated neural network illustrates the abilities of the model (1) to learn, via a natural step-by-step training protocol, the paradigmatic task (delayed response) used for testing prefrontal neurons in primates, (2) to display the same categories of neuronal activities, and (3) to predict how they change during learning. In agreement with experimental data, two main types of activity contribute to the adaptive properties of the network. The first is transient activity time-locked to events of the task and its profile remains constant during successive training stages. The second is sustained activity that undergoes nonmonotonic changes with changes in reward contingency that occur during the transition between stages.

Published
1995
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8. TCT-107 The DISCOVER Registry: 1 Year outcomes of a fully re-positionable and retrievable non-metallic transcatheter aortic valve in a real-world population

Author

Fernando Gatto, Thierry Lefèvre, Ulrich Hink, Martine Gilard, Karl-Heinz Kuck, Antonio Colombo, Christoph Naber, Federico De Marco, Jan Van der Heyden, Christian Butter, Didier Tchetche, Guus R. G. Brueren, Smita Scholtz, Peter den Heijer, Dimitar Divchev, Wolfgang Schillinger, Azeem Latib, Federico M. Asch, Hüseyin Ince, Joachim Schofer, Peter Frambach, Giuseppe Bruschi, Stephan Kische, Daniel R. Wagner, Hervé Le Breton, Georg Nickenig, Laboratory of Cardiovascular Research, Centre de Recherche Public de la Santé, Division of Cardiology, Hôpital Minicipal et Clinique D'Eich-Centre Hospitalier du Luxembourg (CHL), Optimisation des régulations physiologiques (ORPHY (EA 4324)), Université de Brest (UBO)-Centre Hospitalier Régional Universitaire de Brest (CHRU Brest)-Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO)-Université de Brest (UBO), Département Electronique et Physique (TSP - EPH), Institut Mines-Télécom [Paris] (IMT)-Télécom SudParis (TSP), Laboratoire Traitement du Signal et de l'Image (LTSI), Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Pontchaillou [Rennes], Département Electronique et Physique (EPH), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM), and Jonchère, Laurent

Subjects
[SDV.IB] Life Sciences [q-bio]/Bioengineering, Aortic valve, medicine.medical_specialty, Transcatheter aortic, business.industry, 030204 cardiovascular system & hematology, Direct flow, 03 medical and health sciences, 0302 clinical medicine, medicine.anatomical_structure, Internal medicine, medicine, Cardiology, [SDV.IB]Life Sciences [q-bio]/Bioengineering, 030212 general & internal medicine, Radiology, Cardiology and Cardiovascular Medicine, business, ComputingMilieux_MISCELLANEOUS
Abstract

The Direct Flow Medical Trans-catheter Aortic Valve System has a non-metallic design with a pressurized support structure, which allows precise positioning, retrieval and full hemodynamic assessment of valve performance prior to permanent implantation. The DISCOVER registry is a European prospective

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