340 research outputs found
Digital Video Broadcast-Terrestrial (DVB-T) Single Frequency Networks Positioning in Dynamic Scenarios
No full textSince Global Navigation Satellite Systems (GNSS) show degraded performance in dense urban and indoor areas, a positioning sensor based on Digital Video Broadcast-Terrestrial (DVB-T) systems is presented in this paper. DVB-T signals can be considered as signals-of-opportunity for positioning, due to their good properties. One of the challenges to overcome is to distinguish the signals from different emitters. Here, we suppose that the user can first compute his position by GNSS during an initialization phase, which is used for solving all the ambiguities concerning DVB-T emitters. Starting from there, DVB-T signals can be used for aiding positioning when the user enters a GNSS-blocked area, up to a limit case, where all the GNSS satellites are not in view and only DVB-T signals are used for positioning. We tested this method by simulation, by adopting the Hata model for the emitter attenuations and the Rayleigh model for multipath. The obtained results show good performance if the receiver correctly associates the signal to the user’s motion
The ambiguous role of perception. Empiricist views and biological perspectives on sense perception within the Hippocratics.
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In forma di senso. L'encefalocentrismo del trattato ippocratico Sulla malattia sacra nel suo contesto epistemologico.
No full textBetween distinction and separation. Rethinking the centrality of the brain in Alcmaeon’s theory of sense-perception and cognition.
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Le rappresentazioni del corpo "anaisthētos" nel "Corpus Hippocraticum": una 'via negativa' verso la conoscenza
No full textThis paper seeks to investigate the medical representations and descriptions of ἀναισθησία as we find them in the Hippocratic Corpus. It represents an attempt to analyze both the cognitive and the physiological aspects of perception and, above all, its distortion and/or absence in Hippocratic medicine. The medical phenomenology of ἀναισθησία will be considered in respect to both its outcomes (inability to perceive the outside world; inability to perceive one's internal states), but also in the light of, and in connection with, other phenomena like the absence/suspension of phonation, disturbances of breathing, alteration of the body's motor functions, and insensibility to pain
Maria Michela Sassi (ed.), Tracce nella mente. Teorie della memoria da Platone ai moderni
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