1,720,986 research outputs found
Analisi delle linee di evoluzione di un progetto ad ampio impiego di tecnologia per la sanità
No full textIl processo di introduzione pianificata di tecnologia e di personale appropriato, dedicato alla sua acquisizione, manutenzione e gestione, viene analizzato prendendo
come caso di studio l’esperienza del Sistema Sanitario di Trieste che dal 1975, per mezzo del “Progetto Cattinara”, ha impostato in forma innovativa un
proficuo rapporto con le tecnologie per la salute. Questa intuizione originaria viene messa in relazione e confrontata con le conseguenze degli attuali sviluppi tecnologici
nel settore delle biotecnologie in generale. Sono affrontate sinteticamente le nuove prospettive emergenti nei processi diagnostici e terapeutici, focalizzando
l’attenzione sulle ripercussioni provocate all’interno nel processo di formazione dei tecnici, sulla necessità che si sviluppi un “sapere trans-disciplinare”, sui nuovi
orientamenti che si impongono nella struttura da dare e nella progettazione da seguire per la costruzione di nuovi ospedali. Il capitolo si conclude con una riflessione
sulla necessità di una crescita di una comunità delle scienze della vita in cui armonicamente possano coniugarsi gli aspetti della ricerca a breve, medio e lungo termine,
esprimersi pienamente le nuove potenzialità terapeutiche e crearsi tessuti imprenditoriali destinati alla valorizzazione dei risultati della ricerca
Elementi di fisica della circolazione extracorporea.
No full textVengono sviluppati i concetti fondamentali della circolazione dei fluidi, particolarizzandone il comportamento nel caso di fluidi non newtoniani che si muovono in regime oscillatorio in vasi artificiali di natura non biologica. Il capitolo è diviso in tre parti: nella prima è trattato il comportamento del flusso di un fluido ideale in un circuito extracorporeo, nella seconda è riportata un'introduzione matematica ad alcuni aspetti della fluidodinamica e nella terza sono presentate le caratteristiche fluidiche rilevanti del sangue
Fast Optical Response of Cortical Neurons to Visual Stimulation
No full textAim of this researh is the identification of a non invasive
methodology to detect the fast NIRS signal during visual stim-
ulation. We based our studies on Gratton and Steinbrink
works on fast NIRS identification and we focalized our atten-
tion on how to increase the signal to noise ratio. The first
step was to develop a visual stimulus for maximize neuronal
activity in according to the hypercolumn model of Hebel and
Wiesel; afterwards, using flexible and low-cost instruments,
LEDs and Photodiode, and developing a new head support for
this devices, we set the basies for a flexible instrumental de-
sign to identified NIRS signal, leaving the possibility to im-
prove mathematical algorithms for epocs extraction and signal
analysis for later time
Relative photometric measurements of retinal circulation. A video technique
No full textA new and non invasive method for the study of the dynamics of human retinal circulation through recording of fluorescein dilution curves by means of a high sensitivity TV camera
System for the interaction between the ocular movement of a subject and a personal computer
No full textAn apparatus for the interaction between the ocular movement of a subject and a personal computer (PC), comprises sensor means (1a, 1b, 2a, 2b, 4) for detecting the ocular movements of said subject, filtering and amplifying means (5) for filtering and amplifying signals generated by said sensor means (1a, 1b, 2a, 2b, 4) and coding means (11) for coding said signals, said coding means (11) is suitable for coding said signals according to the USB protocol of a personal computer. A method for the interaction between the ocular movements of a subject and a personal computer comprises detecting said ocular movements by means of sensor means (1a, 1b, 2a, 2b, 4), filtering and amplifying signals generated by said sensor means (1a, 1b, 2a, 2b, 4), coding said signals; said signals are coded according to the USB protocol of a personal computer
A new methodology to evaluate Human Workload State Inference
Full text linkElectronics and automation are increasingly part
of our daily lives, and led to the introduction of systems and
intelligent machines to which the human work is delegated and
that collaborate and support the user in the conduct of mancritical
operations.
The University of Modena and Reggio Emilia is partner of
the european project “Designing Dynamic Distributed
Cooperative Human-Machine Systems” (D3CoS,
www.d3cos.eu), that aim is the definition of affordable methods,
techniques and tools which go beyond assistance systems and
consequently address the specification, development and
evaluation of cooperative systems from a multi-agent
perspective where human and machine agents are in charge of
common tasks, assigned to the system as a whole. The key on
which to base the cooperation between the machine and the
human is the amount of workload of the human operator.
So we were involved into investigate aspects of the functional
state of human operators interacting with the demonstrator in
the unmanned aerial vehicle (UAV) and maritime domains. We
analyzed and correlated objective psycho-physiological
measures: eye blinks, respiration rate and amplitude, electro
dermal activity, heart rate variability, blood pressure; with
subjective self-assessed measure evaluated with two
questionnaires: NASA-TLX and Rating Scale Mental Effort
(RSME); with the aim to realize a mathematical regression
model for classifying the mental operators workload.
Keywords— Workload, psycho-physiological measures,
statistical analysis, cooperative systems
A METHOD FOR GIVING COMMANDS BY MEANS OF EYE MOVEMENTS
No full textA method for giving commands by means of eye movements, characterised in that it comprises following stages: detecting an image of the pupil and detecting an initial fixation position of a centre of a pupil (O) with respect to a predetermined reference system; positioning a centre of a discrete bundle of straight lines having predetermined directions, at a centre of the pupil (O) and dividing a plane of the image into discrete regions; positioning a centre of a discrete bundle of rays at the centre of the pupil (O), the bundle of rays having predetermined directions and senses; associating each discrete region to a specific directed ray belonging to the discrete bundle of orientated rays; detecting a final position of fixation assumed by the centre of the pupil (O) after a displacement thereof with respect to the initial fixation position; identifying a first displacement vector of the centre of the pupil (O) having an origin in the initial position of the centre of the pupil (O) and a vertex in the final position of the centre of the pupil (O); associating one of the orientated rays of the discrete bundle to the direction and sense of a first displacement vector assignable to an object to be moved (P); attributing, to the first displacement vector of the object (P) associated to the orientated ray of the discrete bundle, a modulus which is identical to a modulus of the first displacement vector of the centre of the pupil (O) multiplied by a predetermined gain factor
Fast optical changes recorded in primary visual cortex during visual stimulation
No full textNear infrared spectroscopy (NIRS) is now an established non-invasively clinical technique to detect changes in blood flow [1][2]. In recent studies, NIRS, is instead used to detect neuronal activities, consistent with evoked potentials, arising from changes in light scattering and diffusion related either to membrane potential variations and cell swelling [3]. These optical response, called fast NIRS, occurs with a latency time of an order of milliseconds after stimulus presentation.
After the first studies performed with a continuous light system [4], we tested the ability to detect an optical response due to visual stimulation with a frequency modulated light source
Experimental errors in digital image processing for the determination of geometrical parameters of the human eye.
No full textMethod to evidence errors in acquiring information about shape and dimension of anterior segment of the human eye through processing of images obtaiuned from slit lamp
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