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Université de Rennes | Institut De Physique De Rennes - Academia.edu
The mines of the Laurion plateau were in full operation from 480 to 431 BC. These silver-bearing lead mines, the exploitation of which remains mysterious, will contribute to the prestige of Athens and Pericles. Very many mine shafts will... more
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Experimental observations of confined granular materials in the presence of an electric field that induces cohesive forces are reported. The angle of repose is found to increase with the cohesive force. A theoretical model for the... more
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      Mathematical PhysicsClassical PhysicsSteady stateGranular Material
On one hand the graph isomorphism problem (GI) has received considerable attention due to its unresolved complexity status and its many practical applications. On the other hand a notion of compatible topologies on graphs has emerged from... more
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      Theoretical Computer ScienceConnectednessMathematical SciencesDigital Topology
Experimental observations of confined granular materials in the presence of an electric field that induces cohesive forces are reported. The angle of repose is found to increase with the cohesive force. A theoretical model for the... more
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      Mathematical PhysicsPhysicsClassical PhysicsSteady state
Context Changes in environmental conditions may influence bird populations, including pest bird species, and their distribution. In Argentina, particularly in the Pampas region, agricultural expansion has resulted in important changes in... more
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      GeographyBiological SciencesEnvironmental SciencesWildlife
We have studied single curved films stabilized by globular proteins, using small angle scattering. By combining both the use of in-house X-ray and synchrotron radiation, we have measured the structural properties of films (thickness,... more
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      EngineeringMaterials ScienceSoft MatterPhysical sciences
lished human temporal bone measurements. We showed that the cochlea influences the transfer function only at high frequency and could be omitted from a surgical simulator. In addition, surgeons were able to manipulate the validated middle... more
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      Clinical SciencesAudiology and NeurotologyNeurosciences
Cochlear implant array insertion forces are potentially related to cochlear trauma. We compared these forces between a standard (Digisonic SP; Neurelec, Vallauris, France) and an array prototype (Neurelec) with a smaller diameter. The... more
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      RoboticsRobotic SurgeryTissue BanksCochlear Implant
Computer-assisted navigation systems can now potentially guide the surgeon to the cochlea with a trajectory avoiding the facial nerve through a keyhole approach. Five temporal bone specimens, with 4 titanium screws placed in the mastoid... more
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      SoftwareComputer assisted orthopaedic surgeryThree Dimensional ImagingTemporal Bone
Otological microsurgery is delicate and requires high dexterity in bad ergonomic conditions. To assist surgeons in these indications, a teleoperated system, called RobOtol, is developed. This robot enhances gesture accuracy and handiness... more
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      RoboticsAlgorithmsTechnologyMicrosurgery
Introduction. In order to achieve a minimal trauma to the inner ear structures during array insertion, it would be suitable to control insertion forces. The aim of this work was to compare the insertion forces of an array insertion into... more
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      TechnologyBiological SciencesNeural ProsthesesCochlear Implants
Hypothesis: Loading otoprotective drug into cochlear implant might change its mechanical properties, thus compromising atraumatic insertion. This study evaluated the effect of incorporation of dexamethasone (DXM) in the silicone of... more
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      ZoologyDexamethasoneCochlear ImplantsAnti-inflammatory agents
This paper is centered on the development of a new training and rehearsal simulation system for middle ear surgery. First, we have developed and validated a mechanical atlas based on finite element method of the human middle ear. The... more
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      Magnetic Resonance ImagingComputer assisted orthopaedic surgeryComputer SimulationComputer Assisted Instruction
Middle ear surgery involves the smallest and the most fragile bones of the human body. Since microsurgical gestures and a submillimetric precision are required in these procedures, the outcome can be potentially improved by robotic... more
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      RoboticsComputational BiologyMicrosurgerySoftware
Hypothesis: The aim of the study was to evaluate force profiles during array insertion in human cochlea specimens and to evaluate a mechatronic inserter using a 1-axis force sensor. Background: Today, the surgical challenge in cochlear... more
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      ZoologyCochlear ImplantsFrictionClinical Sciences
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      RoboticsMagnetic Resonance ImagingMicrosurgeryComputer assisted orthopaedic surgery
RobOtol is a micro-surgical tele operated system designed to assist middle ear surgery. A new prototype, with an improved controller system and mechanical enhancement is presented. Surgeons and engineers evaluated the robot by tasks... more
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    • OPERATING SYSTEM
Middle ear surgery requires micro-surgical techniques and may benefit from robotic assistance. A prototype of tele-operated system is presented. Methods to determine design specifications, kinematic structure and optimization of the... more
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      SurgeryOPERATING SYSTEMVisual ImpairmentTelerobotics
In order to design a drug delivery system to the human cochlea, a magnetic pump driving Fe3O4 super paramagnetic nanoparticles (MNP) attachable to a drug was evaluated. Such a device could be inserted into the cochlea by a minimally... more
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