Search results for "informatica"
showing 10 items of 1003 documents
A silicon photomultiplier-based analog front-end for DC component rejection and pulse wave recording in photoplethysmographic applications
2022
The growing attention towards healthcare and the constant technological innovations in the field of semiconductor components have allowed a widespread availability of smaller devices, suitable to be worn and able to continuously acquire physiological signals. Wearable devices are, however, more prone to yield signals corrupted by artifacts caused by movement. This issue is particularly relevant in photoplethysmographic (PPG) applications where also, to exploit the whole dynamic range of the acquisition device, the DC component of the signal should be removed and the AC component amplified. In this context, we have designed and realized an analog front-end (AFE) suitable to be integrated wit…
An Integrated Method for Image Retrieval
1995
This paper presents an information fusion method for image retrieval; the retrieval strategy is based on statistical and geometrical features extracted from sub-images. Our goal is to find a set of best similar images related to a prototype image; this goal may be obtained according to image content rather than symbolic attributes. MRI (Magnetic Resonance Imaging) images and astronomical images have been adopted to test the method. Main steps of the procedure to retrieve images are: (l) Segmentation, (2) Matching, and (3) Decision. The first step involves four clusters co-operating segmentation algorithms; in the matching step, a sets of candidate similar images is provided; finally an info…
Polygonal mesh segmentation by surface curvature diffusion.
2011
Postmortem Electrical Conductivity Changes of Dicentrarchus labrax Skeletal Muscle: Root Mean Square (RMS) Parameter in Estimating Time since Death
2022
Electric impedance spectroscopy techniques have been widely employed to study basic biological processes, and recently explored to estimate postmortem interval (PMI). However, the most-relevant parameter to approximate PMI has not been recognized so far. This study investigated electrical conductivity changes in muscle of 18 sea bass specimens, maintained at different room temperatures (15.0 °C; 20.0 °C; 25.0 °C), during a 24 h postmortem period using an oscilloscope coupled with a signal generator, as innovative technology. The root mean square (RMS) was selected among all measured parameters, and recorded every 15 min for 24 h after death. The RMS(t) time series for each anima…
Connectivity Analysis in EEG Data: A Tutorial Review of the State of the Art and Emerging Trends
2023
Understanding how different areas of the human brain communicate with each other is a crucial issue in neuroscience. The concepts of structural, functional and effective connectivity have been widely exploited to describe the human connectome, consisting of brain networks, their structural connections and functional interactions. Despite high-spatial-resolution imaging techniques such as functional magnetic resonance imaging (fMRI) being widely used to map this complex network of multiple interactions, electroencephalographic (EEG) recordings claim high temporal resolution and are thus perfectly suitable to describe either spatially distributed and temporally dynamic patterns of neural acti…
Formalizzazione della vaghezza
2009
L'effetto della tessitura interna sulle preferenze cognitive
2008
In questo lavoro vengono esplorati gli effetti della tessitura interna di un'immagine sulle preferenze cognitive relative alla simmetria percepita. A questo scopo è stato preparato un test su soggetti umani basato sulla identificazione della simmetria principale in una figura geometrica al variare della sua tessitura interna, i cui esiti sono stati comparati con l'analisi effettuata da un modello di ricerca della simmetria fuzzy che incorpora elementi di preferenza ricalcati sull'esperienza umana. Dai risultati ottenuti si può vedere come, in accordo con il modello gestaltico, la preferenza cognitiva relativa alla simmetria viene influenzata anche da fattori considerati secondari come la te…
Il linguaggio informatico inglese e italiano: considerazioni su alcuni aspetti lessicali dal confronto tra le due lingue.
2005
Nel corso di quest'ultimo ventennio lo studio dei linguaggi specialistici ha ricevuto un'attenzione sempre maggiore, parallelamente alla rapida espansione della letteratura tecnico-scientifica in diversi campi del sapere. Uno degli ambiti specialistici in costante evoluzione è senza dubbio quello informatico. Proprio la terminologia connessa con lo sviluppo di questo specifico settore sarà qui assunta a oggetto di analisi e di riflessione. Più precisamente, taluni aspetti terminologici del linguaggio informatico inglese verranno messi a confronto con i corrispondenti aspetti del linguaggio informatico italiano così che emergano sia certi tratti peculiari dell'uno e dell'altro, sia rilevanti…
Modeling and designing a robotic swarm: A quantum computing approach
2023
Nature is a neverending source of inspiration for technology. Quantum physics suggests applications to- ward quantum computing. Swarms’ self-organization leads to robotic swarm developments. Here, quantum computing is applied to swarm robotics. We model local interactions with a quantum circuit, testing it on simulators and quantum computers. To relate local with global behavior, we develop a block matrix-based model. Diagonal sub-matrices contain information on single robots; off-diagonal sub-matrices are the pairwise interaction terms. Comparing different swarms means comparing different block matrices. Choosing initial values and computation rules for off-diagonal blocks (with a particul…
Novel VAMPIRE algorithms for quantitative analysis of the retinal vasculature
2013
This paper summarizes three recent, novel algorithms developed within VAMPIRE, namely optic disc and macula detection, arteryvein classification, and enhancement of binary vessel masks, and their performance assessment. VAMPIRE is an international collaboration growing a suite of software tools to allow efficient quantification of morphological properties of the retinal vasculature in large collections of fundus camera images. VAMPIRE measurements are currently mostly used in biomarker research, i.e., investigating associations between the morphology of the retinal vasculature and a number of clinical and cognitive conditions.