1,355,179 research outputs found
Epifani nella prima fase del regionalismo italiano
No full textPremessi brevi cenni sulla distinzione tra i concetti di federalismo e di regionalismo, il contributo indaga il pensiero e l'opera di Vito Donato Epifani, sostenitore dell'idea regionale nella seconda metà del XIX secolo e precursore del principio di sussidiarietà
Means of nonparametric priors based on Increasing Additive Processes
No full textWe provide a survey on some distributional results concerning means of random probability measure constructed via suitable transformation of an increasing additive process (abbreviated as IAP), i.e. increasing, not necessarily hopmogeneous, and purely discontinuous Lévy process. In particular, we deal with normalized random measures having independent increments and with neutral to the right (NTR) random probability measures. The former are obtained by normalizing IAPs and the exact distribution of a mean is found by resorting to a well-known inversion formula for characteristic functions. Morevoer, expressions of the posterior distributions of those means, in the presence of exchangeable observations, are given. Also the latter may be characterized in terms of IAPs and we show the connection between a mean of a NTR prior and the so-called exponential functional. We study finiteness and absolute continuity of these functionals and provide some formulae for computing their moments, provided they exist. All the results contained in the first section can be found in Lijoi, Regazzini and Pruenster (2000) whereas those of Section 2 are based on Epifani, Lijoi and Pruenster (2002)
Some considerations on a version of the law of the iterated logarithm due to F. P. Cantelli
No full textIstituto Lombardo. Accademia di Scienze e Lettere. Rendiconti. Scienze Matematiche e Applicazioni. A ISSN: 0021-250
A finitely additive version of the law of the iterated logarithm
No full textA finitely additive version of the law of the iterated logarithm (LIL) is proposed. The formulation involves only finite-dimensional distributions of a sequence of independent random variables. It is also proved that in the case where one deals with σ-additive probabilities, the given result is equivalent to the classical version of the LIL
Nonparametric Priors for Vectors of Survival Functions
Get PDFThe paper proposes a new nonparametric prior for twodimensional vectors of survival functions (S1, S2). The definition we introduce is based on the notion of L´evy copula and it will be used to model, in a nonparametric Bayesian framework, twosample survival data. Such an application will yield a natural extension of the more familiar neutral to the right process of Doksum (1974) adopted for drawing inferences on single survival functions. We, then, obtain a description of the posterior distribution of (S1, S2), conditionally on possibly rightcensored data. As a byproduct of our analysis, we find out that the marginal distribution of a pair of observations from the two samples coincides with the MarshallOlkin or the Weibull distribution according to specific choices of the marginal L´evy measures
Morphometric and neurophysiological analysis of skeletal muscle in paraplegic patients with traumatic cord lesion.
No full textParaplegia. 1991 May;29(4):247-52.
Morphometric and neurophysiological analysis of skeletal muscle in paraplegic patients with traumatic cord lesion.
Lotta S, Scelsi R, Alfonsi E, Saitta A, Nicolotti D, Epifani P, Carraro U.
Source
Centro di Recupero G. Verdi, USL.3., Pavia, Italy.
Abstract
Morphometric and electrophoretic properties of soleus and medialis gastrocnemius fibres from paraplegic patients were studied 1 to 10 months following complete traumatic cord transection (spinal cord level C5-T1). In the short term of paraplegia (1-6 months) gastrocnemius medialis and soleus muscles showed predominant atrophy of IIA fibre types. In long term paraplegia (8-10 months) atrophy and reduction of type 1 fibres, with presence of high percentages of type IIB fibres, were seen in both studied muscles. The consistence in both muscles of IIB intermediate fibres in long term paraplegia, seems to indicate the initial stage of a mechanism of fibre transformation reflecting the adaptative capacity of the paretic muscle to spasticity. Electrophysiological studies of the H-reflex and the H/M ratio values reveal an increase of the H-reflex excitability in the soleus and gastrocnemius muscles during a 1 to 10 months follow-up.
PMID:
1831255
[PubMed - indexed for MEDLINE
Autonomous Intelligent Remote Sensing System for Military Threat Object Detection
No full textArtificial intelligence is revolutionizing many fields across the board. As new methods are proposed in the literature, they not only impose the state of the art of a specific field, but also positively influence other domains into which the results obtained can be transferred. In this paper, we propose a multi-stage system for solving a multidisciplinary problem: the identification of objects within a video stream and a measure of their threat level. The proposed system uses deep learning techniques developed in different application domains, in which great results are already widely documented
Predicting donations and profiling donors in a blood collection center: a Bayesian approach
No full textDonor profiling and donation prediction are two key tasks that any blood collection center must face. Profiling is important to target promotion campaigns, recruiting donors who will guarantee a high production of blood units over time. Predicting the future arrivals of donors allows to size the collection center properly and to provide reliable information on the future production of blood units. Both tasks can be addressed through a statistical prediction model for the intensity function of the donation event. We propose a Bayesian model, which describes this intensity as a function of individual donor's random frailties and their fixed-time and time-dependent covariates. Our model explains donors' behaviors from their first donation based on their individual characteristics. We apply it to data of recurrent donors provided by the Milan department of the Associazione Volontari Italiani del Sangue in Italy. Our method proved to fit those data, but it can also be easily applied to other blood collection centers. The method also allows general indications to be drawn, supported by quantitative analyses, to be provided to staff
Esperienze soggettive disturbanti e vulnerabilità psicotica: Due tradizioni di ricerca.
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