Search results for "Senso"
showing 10 items of 4750 documents
Cortical Proprioceptive Processing Is Altered by Aging
2018
Proprioceptive perception is impaired with aging, but little is known about aging-related deterioration of proprioception at the cortical level. Corticokinematic coherence (CKC) between limb kinematic and magnetoencephalographic (MEG) signals reflects cortical processing of proprioceptive afference. We, thus, compared CKC strength to ankle movements between younger and older subjects, and examined whether CKC predicts postural stability. Fifteen younger (range 18-31 years) and eight older (66-73 years) sedentary volunteers were seated in MEG, while their right and left ankle joints were moved separately at 2 Hz (for 4 min each) using a novel MEG-compatible ankle-movement actuator. Coherence…
Biogenic Amines Modulate Olfactory Receptor Neurons Firing Activity in Mamestra brassicae
2001
The modulatory effects of the biogenic amines octopamine and serotonin on pheromonal receptor neurons of Mamestra brassicae were investigated. The responses to sex pheromone components of two cells types (A and B) in single male long sensilla trichodea were monitored. Cell types A and B do not respond to the same compound. The response of type A to a pulse of the major sex pheromone component increased 5 min after octopamine injection. Responses of type B to other odorants increased after 30 min. In the absence of any pheromone stimulation the background firing activity of type A increased following octopamine injection. This background activity was used to evaluate the kinetics of octopami…
Somatosensory event-related potentials in the rabbit cerebral and cerebellar cortices: a correspondence with mismatch responses in humans.
2001
Somatosensory event-related potentials (ERPs) were recorded from the cerebellar (CerCx), somatosensory (SomCx) and visual (VCx) cortices in rabbits in two stimulus conditions. In the oddball condition, airpuffs to two different locations in the rabbit's muzzle corresponded to infrequently presented deviant stimuli (oddball-deviants) interspersed with frequently presented standard stimuli. In the deviant-alone condition, deviants (alone-deviants) were presented without standards. ERPs to oddball-deviants differed significantly from those to standards in CerCx and SomCx, but not in VCx. Furthermore, some of these differences were not found between ERPs to alone-deviants and those to standards…
Ensuring High Performance of Consensus-Based Estimation by Lifetime Maximization in WSNs
2015
The estimation of a parameter corrupted by noise is a common tasks in wireless sensor networks, where the deployed nodes cooperate in order to improve their own inaccurate observations. This cooperation usually involves successive data exchanges and local information updates until a global consensus value is reached. The quality of the final estimator depends on the amount of collected observations, hence the number of active nodes. Moreover, the inherent iterative nature of the consensus process involves a certain energy consumption. Since the devices composing the network are usually battery powered, nodes becoming inactive due to battery depletion emerges as a serious problem. In this wo…
Algoritmi reputazionali e consenso validamente prestato
2021
Il commento analizza la recente giurisprudenza di legittimità in materia di algoritmo reputazionale: la Cassazione, nel riprendere la lettura del Garante della privacy, afferma come ai fini del trattamento lecito dei dati da parte delle piattaforme web, il consenso è validamente manifestato solo se relativo ad uno specifico trattamento; e sempre che il singolo sia stato adeguatamente informato delle modalità di funzionamento dell’algoritmo. L’autrice sottolinea come in chiave prospettica un simile orientamento consentirebbe di limitare le forme di discriminazione “occulta”, che spesso le piattaforme predispongono all’insaputa dei lavoratori
A Refractive Index Sensor Based on the Resonant Coupling to Cladding Modes in a Fiber Loop
2013
We report an easy-to-build, compact, and low-cost optical fiber refractive index sensor. It consists of a single fiber loop whose transmission spectra exhibit a series of notches produced by the resonant coupling between the fundamental mode and the cladding modes in a uniformly bent fiber. The wavelength of the notches, distributed in a wavelength span from 1,400 to 1,700 nm, can be tuned by adjusting the diameter of the fiber loop and are sensitive to refractive index changes of the external medium. Sensitivities of 170 and 800 nm per refractive index unit for water solutions and for the refractive index interval 1.40-1.442, respectively, are demonstrated. We estimate a long range resolut…
Sensitivity optimization with cladding-etched long period fiber gratings at the dispersion turning point
2016
This work presents a refractive index sensor based on a long period fiber grating (LPFG) made in a reduced cladding fiber whose low order cladding modes have the turning point at large wavelengths. The combination of these parameters results in an improved sensitivity of 8734 nm/refractive index unit (RIU) for the LP0,3 mode in the 1400-1650 wavelength range. This value is similar to that obtained with thin-film coated LPFGs, which permits to avoid the coating deposition step. The numerical simulations are in agreement with the experimental results. This work was supported in part by the Spanish Ministry of Education and Science-FEDER TEC2013-43679-R. J.L. Cruz also acknowledges financial s…
Tesi portanti di un'antropologia di segno sponsale
2015
Il saggio presenta e argomenta alcune affermazioni che consentano di intendere l'amore sponsale come ambito di crescita educativa delle persone: itinerario nel quale sia possibile pervenire ad una conoscenza sempre più adeguata del nome proprio e del desiderio d'essere e di senso costitutivo di ogni soggetto. Assumono rilievo le categorie di relazionalità riconoscente e quella del dono incondizionato di sé all'altro.
Chapter 1 Pain and hyperalgesia: definitions and theories
2006
Publisher Summary This chapter describes pain as an unpleasant sensory and emotional experience associated with actual or potential tissue damage. It reflects the first-person perspective of pain: “pain is an unpleasant sensory and emotional experience.” “Nociception” is a term that may more adequately reflect these aspects of pain sensation. The chapter reviews that the adequate stimulus to activate the receptive organs of the nociceptive system consists of either actual or potential tissue damage. But not all noxious stimuli are detected by the nociceptive system. Therefore, the adequate stimulus for this system in the strict sense is that subset of noxious stimuli that can be encoded by …
Influence of mass transport on the competition between corrosion of aluminium alloy surface and the release of primer containing inhibitors : validat…
2014
The conventional aircraft paint scheme for corrosion protection of aluminum structures is partly based on application of a primer containing inhibitors. In such coatings, release of the inhibiting species enables fast healing of a bare metal surface after a mechanical damage of the protective layers. Nevertheless, considering possible depletion of inhibitors by uncontrolled leaching, it appears important to estimate the corrosion risk integrating “corrosion” sensors in the structure. The objective of this work was to understand the operating mode of a sensor simulating a damaged paint coating whose concept is based on the competition between the triggering of localized corrosion and the pas…