Search results for "REVISION"

Coherent Conditional Previsions and Proper Scoring Rules

2012

In this paper we study the relationship between the notion of coherence for conditional prevision assessments on a family of finite conditional random quantities and the notion of admissibility with respect to bounded strictly proper scoring rules. Our work extends recent results given by the last two authors of this paper on the equivalence between coherence and admissibility for conditional probability assessments. In order to prove that admissibility implies coherence a key role is played by the notion of Bregman divergence.

On general conditional random quantities

2009

In the first part of this paper, recalling a general discussion on iterated conditioning given by de Finetti in the appendix of his book, vol. 2, we give a representation of a conditional random quantity $X|HK$ as $(X|H)|K$. In this way, we obtain the classical formula $\pr{(XH|K)} =\pr{(X|HK)P(H|K)}$, by simply using linearity of prevision. Then, we consider the notion of general conditional prevision $\pr(X|Y)$, where $X$ and $Y$ are two random quantities, introduced in 1990 in a paper by Lad and Dickey. After recalling the case where $Y$ is an event, we consider the case of discrete finite random quantities and we make some critical comments and examples. We give a notion of coherence fo…

Il cotile. La revisione nelle protesi totale d'anca

2011

MODELLO DI PREVISIONE DELLA STATURA FINALE IN PAZIENTI PEDIATRICI ITALIANI AFFETTI DA DEFICIT DI GH TRATTATI CON SOMATROPINA

2021

Obiettivi: elaborare un modello di previsione della statura finale in pazienti pediatrici con deficit di GH trattati con somatropina ricombinante, valutando quali siano le variabili più importanti nel determinismo della statura finale. Metodi: 1043 pazienti trattati per deficit di GH (picco di GH <10 ng/dl a 2 test di stimolo) giunti ad altezza finale. Mediana età a inizio trattamento 11 (IQR 8.7/12.8) anni; mediana altezza a inizio trattamento -2.43 (IQR -2.80/-2.01) SDS; mediana altezza bersaglio -1.09 (IQR -1.63/-0.48) SDS; dose iniziale di somatropina mediana altezza finale -1.08 SDS (IQR -1.64/-0.50 SDS, vs altezza a inizio trattamento p <0.001, vs altezza bersaglio p=ns). Analis…

I controlli dell'Organo di revisione sugli atti di programmazione dell'ente locale

2020

Il capitolo tratta delle funzioni che gli Organi di revisione degli Enti locali sono tenuti a svolgere, con specifico riferimento agli atti di programmazione. Vengono esplicitate, anche con l’ausilio di appositi quadri sinottici, le fasi del processo di verifica su ciascun atto programmatorio. Apposito paragrafo è inoltre rivolto a sensibilizzare gli Organi di controllo circa le attività da svolgere nel caso in cui l’Ente si avvalga degli istituti dell’esercizio provvisorio e della gestione provvisoria.

Analisi delle serie storiche economiche

2009

Ricorda cosa ti hanno fatto in Auschwitz

2010

L'autore ricostruisce la genesi dell'opera di Luigi Nono e ne difende l'efficacia messa in dubbio dal dibattito sull'inefficacia del memoriale italiano di Auschwitz e sulla minaccia di un suo smantellamento ad opera dell' attuale direzione dell'ex-campo di concentramento

The Stability Theory of Knowledge and Belief Revision: Comments on Rott

2005

In this commentary on Rott’s paper “Stability, Strength and Sensitivity: Converting Belief into Knowledge”, I discuss two problems of the stability theory of knowledge which are pointed out by Rott. I conclude that these problems offer no reason for rejecting the stability theory, but might be grounds for deviating from the standard AGM account of belief revision which Rott presupposes.

Reassessing Accuracy Rates of Median Decisions

2007

We show how Bruno de Finetti''s fundamental theorem of prevision has computable applications in statistical problems that involve only partial information. Specifically, we assess accuracy rates for median decision procedures used in the radiological diagnosis of asbestosis. Conditional exchangeability of individual radiologists'' diagnoses is recognized as more appropriate than independence which is commonly presumed. The FTP yields coherent bounds on probabilities of interest when available information is insufficient to determine a complete distribution. Further assertions that are natural to the problem motivate a partial ordering of conditional probabilities, extending the computation …

Formalized classification of ephemeral wetland vegetation (Isoëto-Nanojuncetea class) in Poland (Central Europe)

2021

Formalized classification of the class Isoëto-Nanojuncetea has not been performed in Poland. We used 69,562 relevés stored in Polish Vegetation Database. Based on the literature and expert knowledge we selected 63 diagnostic species for the Isoëto-Nanojuncetea class. Unequivocal classification was applied in this work according to Cocktail method. A set of formal definitions was established using a combination of logical operators of total cover of species in case of high-rank syntaxa while sociological species groups and cover of particular species were used for logical formulas describing class, alliances and associations. An Expert System was prepared and applied to classify the whole da…