Search results for "Beni culturali"
showing 10 items of 1017 documents
Il web per la cultura. Dalla digital identity alla progettazione dei servizi in rete.
2006
Negli ultimi decenni è in atto una trasformazione nell’ambito dei beni culturali definibile come un processo di apertura dei luoghi della cultura (musei, siti archeologici, biblioteche, etc.) verso l’esterno, determinato dalle istituzioni stesse, con il loro differente modo di intendere la conservazione e di gestire la fruizione del patrimonio storico-artistico e dal sistema dei fruitori, con la loro diversa domanda del prodotto culturale, che si svolge in tempi e modi differenti rispetto al passato. D’altra parte, gli studiosi della cybercultura segnalano che il nostro tempo, con l’incalzante introduzione di nuove tecnologie e strumenti, apparterrebbe in realtà solo agli albori di una rivo…
The use of bioindicators (Posidonia oceanica and benthic foraminifera) to evaluate metal pollution in a complex ecological system: marine coastal env…
2007
A stochastic reaction-diffusion-taxis model for picophytoplankton dynamics
2011
The dynamics of picophytoplankton communities in marine environment is studied by astochastic reaction-dìffusìon-taxis model, analyzing the time evolution of the biomass concentration along a water column. The model is based on two stochastic differentìal equations, where the random fluctuations of the environmental variables are considered by inserting two multiplicative noise terms. Specifically, the model describes the dynamics of diffusion of picophytoplankton biomass and nutrient concentrations. In the proposed model the marine environment is characterized by poorly mixed waters and picophytoplankton is subject to intraspecific competition for light and nutrients. By numerically solvin…
A stochastic reaction-diffusion-taxis model for two picophytoplankton populations
2012
In this work, the stationary distributions of two populations of picophytoplankton, i.e. picoeukaryotes and Prochlorococcus, are studied. This two groups account on average for 60% of the total chlorophyll a (chl a) and divinil chlorophyll a (divinil chl a) concentration in Mediterranean Sea. The interaction of these populations with the environment occurs through two factors that limit the growth of the aquatic microorganisms: light intensity and nutrient, i.e. phosphorus. The dynamics of the two picophytoplanktonic groups, distributed at different depth along a water column (one-dimensional spatial domain), is analyzed starting from a deterministic reaction-diffusion-taxis model. This con…
Mass spectrometry coupled to chromatography systems and cultural heritage: a case study on the content of an ancient jar
2009
In this chapter an introduction to mass spectrometry will be given, with particular reference to mass spectrometry coupled to chromatography systems. Further some mass spectrometry applications in the field of cultural heritage will be briefly reported and discussed. Finally a experimental investigation on the content of an ancient jar will be reported. Together with experimental details a description of the techniques adopted, results obtained and forthcoming experiments will be also given.
On the physical origin of the protein dynamical transition
2012
Automated approach for indirect immunofluorescence images classification based on unsupervised clustering method
2018
Autoimmune diseases (ADs) are a collection of many complex disorders of unknown aetiology resulting in immune responses to self-antigens and are thought to result from interactions between genetic and environmental factors. ADs collectively are amongst the most prevalent diseases in the U.S., affecting at least 7% of the population. The diagnosis of ADs is very complex, the standard screening methods provides seeking and recognizing of Antinuclear Antibodies (ANA) by Indirect ImmunoFluorescence (IIF) based on HEp-2 cells. In this paper an automatic system able to identify and classify the Centromere pattern is presented. The method is based on the grouping of centromeres present on the cell…
Automatic detection of lung nodules in CT datasets based on stable 3D mass–spring models
2012
We propose a computer-aided detection (CAD) system which can detect small-sized (from 3 mm) pulmonary nodules in spiral CT scans. A pulmonary nodule is a small lesion in the lungs, round-shaped (parenchymal nodule) or worm-shaped (juxtapleural nodule). Both kinds of lesions have a radio-density greater than lung parenchyma, thus appearing white on the images. Lung nodules might indicate a lung cancer and their early stage detection arguably improves the patient survival rate. CT is considered to be the most accurate imaging modality for nodule detection. However, the large amount of data per examination makes the full analysis difficult, leading to omission of nodules by the radiologist. We…
EPR dosimetry intercomparison using smart phone touch screen glass
2014
International audience; This paper presents the results of an interlaboratory comparison of retrospective dosimetry using the electron paramagnetic resonance method. The test material used in this exercise was glass coming from the touch screens of smart phones that might be used as fortuitous dosimeters in a large-scale radiological incident. There were 13 participants to whom samples were dispatched, and 11 laboratories reported results. The participants received five calibration samples (0, 0.8, 2, 4, and 10 Gy) and four blindly irradiated samples (0, 0.9, 1.3, and 3.3 Gy). Participants were divided into two groups: for group A (formed by three participants), samples came from a homogene…