Search results for "PRISMS"

showing 3 items of 3 documents

Prismatic Adaptation as a Novel Tool to Directionally Modulate Motor Cortex Excitability: Evidence From Paired-pulse TMS

2014

Abstract Background The prismatic adaptation (PA) is a visuo-motor procedure that has captured the attention of neuroscientists in the last decades, hence it seems to affect high-order cognition. However, the basic neural processes related to PA and its effects on cortical plasticity are not clear yet. Objective/hypothesis The aim of the present study is to explore whether PA induces a direct effect on the motor cortices (M1) excitability. Methods Fourteen healthy participants were submitted to paired-pulse TMS to measure short-intracortical-inhibition (SICI) and intracortical-facilitation (ICF) on both the left and the right M1, before and after PA, that could induce a leftward or rightwar…

AdultMaleBiophysicsAdaptation (eye)Affect (psychology)lcsh:RC321-571NeuroplasticitymedicineHumansPRISMSMotor cortex; Prismatic adaptation; SICI-ICF; Inter-hemispheric excitabilityPrismatic adaptationlcsh:Neurosciences. Biological psychiatry. NeuropsychiatrySettore M-PSI/02 - Psicobiologia E Psicologia FisiologicaPulse (signal processing)General NeuroscienceCognitionNeurophysiologyEvoked Potentials MotorSICI-ICFAdaptation PhysiologicalTranscranial Magnetic Stimulationmedicine.anatomical_structureEXCITABILITYFacilitationInter-hemispheric excitabilityMotor cortexSettore MED/26 - NeurologiaFemaleNeurology (clinical)PsychologyNeuroscienceMotor cortexBrain Stimulation
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Simbol-X Mirror Module Thermal Shields: II-Small Angle X-Ray Scattering Measurements

2009

The formation flight configuration of the Simbol-X mission implies that the X-ray mirror module will be open to Space on both ends. In order to reduce the power required to maintain the thermal stability and, therefore, the high angular resolution of the shell optics, a thin foil thermal shield will cover the mirror module. Different options are presently being studied for the foil material of these shields. We report results of an experimental investigation conducted to verify that the scattering of X-rays, by interaction with the thin foil material of the thermal shield, will not significantly affect the performances of the telescope.

PhysicsPhysics::Instrumentation and DetectorsScatteringbusiness.industryShieldsX-ray bursts X-ray imaging Lenses prisms and mirrorsParticle detectorlaw.inventionTelescopeSettore FIS/05 - Astronomia E AstrofisicaOpticslawShieldAngular resolutionSmall-angle scatteringbusinessX- and gamma-ray telescopes and instrumentation X-ray scattering X-ray sourceFOIL methodAIP Conference Proceedings
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Background Rejection of Charged Particles in the Simbol-X Telescope: Preliminary Study of Protons Scattering

2009

X-ray telescopes equipped with focusing optics in high eccentric orbit, as e.g. Newton-XMM and Chandra, showed a degradation of the detector performance and an important increase of the noise due to soft protons with energy between a few tens of keV and a few MeV, that are focused on the detector through the mirror module. It should be noted that the focusing of the protons by Wolter optics was an unexpected phenomenon. In Simbol-X a magnetic diverter will be implemented to deflect protons, in order to reduce the flux of charged particles impinging upon the focal plane. Obviously the design of the diverter should take into consideration the protons distribution at the exit of the mirror mod…

Physicsbusiness.industryScatteringAstrophysics::High Energy Astrophysical PhenomenaDetectorX-ray opticsCharged particleParticle detectorlaw.inventionTelescopeSettore FIS/05 - Astronomia E AstrofisicaOpticsCardinal pointlawX- and gamma-ray telescopes and instrumentation X-ray beams and x-ray optics Lenses prisms and mirrorsbusinessNoise (radio)AIP Conference Proceedings
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