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showing 6 items of 336 documents
On the friction/tangential restitution problem: Independent friction-restitution modeling of sphere rebound with arbitrary spin
2023
Most descriptions of collision events introduce coefficients of friction and tangential restitution which vary significantly with the impact angle, in contrast with the independence of the normal coefficient of restitution with this parameter. A redefinition of the coefficients of friction and tangential restitution based on the idea that friction and restitution effects can be treated as being mutually independent, provides a satisfactory description of experimental data using a ‘constant’ restitution coefficient independent on the impact angle. This independent friction-restitution modeling is developed here for the rebound of a homogeneous sphere having an arbitrary spin on a rough massi…
Real-world experience with obeticholic acid in patients with primary biliary cholangitis
2021
Background & aims Obeticholic acid (OCA) is the second-line treatment approved for patients with primary biliary cholangitis (PBC) and an inadequate response or intolerance to ursodeoxycholic acid. We aimed to evaluate the effectiveness and safety of OCA under real-world conditions. Methods Patients were recruited into the Italian PBC Registry, a multicentre, observational cohort study that monitors patients with PBC at national level. The primary endpoint was the biochemical response according to Poise criteria; the secondary endpoint was the biochemical response according to normal range criteria, defined as normal levels of bilirubin, alkaline phosphatase (ALP), and alanine aminotransfer…
Sulla rilevanza del valore normale nei trasferimenti immobiliari
2011
Con la legge del 7.07.2009, n. 88 (c.d. legge comunitaria 2008) il legislatore è intervenuto a modificare le disposizioni relative alla determinazione della base imponibile nelle cessioni immobiliari, ripristinando la disciplina antecedente all’emanazione del c.d. decreto Bersani ed eliminando la possibilità di recuperare a tassazione un maggiore imponibile attraverso il ricorso ad una presunzione legale relativa. Nel lavoro, fatta una breve premessa sulle nozioni di valore normale e valore venale, vengono esaminate le conseguenze che la novella normativa ha prodotto sui poteri di rettifica dell’amministrazione finanziaria in materia di IVA, nonché i riflessi che essa, pur non riguardando e…
MODELING OF VOLATILITY IN THE ROMANIAN CAPITAL MARKET
2012
This paper aims to analyze the volatility of capital market in Romania by selecting a portfolio of representative indices (BET BET_FI and RASDAQ_C). In this respect, we want to identify the most appropriate model to estimate volatility by using modern econometric tools and useful GARCH models respectively. The study results highlight that EGARCH(1,1) model has managed to eliminate all traces of statistically significant autocorrelation and ARCH effects from the residuals from daily series, giving an accurate image of the Romanian capital market volatility.
Caracterización de la voz eufónica a partir de parámetros acústicos y electromiografía de superficie
2022
El objetivo de este estudio es describir de manera detallada las características de la voz eufónica o normal, a través de parámetros acústicos de corta duración y electromiográficos de superficie. Procedimiento: Los datos se obtuvieron de 146 sujetos de habla hispana (72 hombres y 74 mujeres) entre 20 y 50 años de edad sin alteración vocal, previo cálculo del tamaño de la muestra. Las muestras vocales fueron clasificadas audioperceptivamente como voces normales (G = 0) por 3 expertos en el área de la voz. Las diferentes muestras vocales se registraron y analizaron con el software de análisis acústico Praat (Boersma & Weenink, Ámsterdam, Países Bajos) y con electromiografía de superficie (EM…
H&E Multi-Laboratory Staining Variance Exploration with Machine Learning
2022
In diagnostic histopathology, hematoxylin and eosin (H&E) staining is a critical process that highlights salient histological features. Staining results vary between laboratories regardless of the histopathological task, although the method does not change. This variance can impair the accuracy of algorithms and histopathologists’ time-to-insight. Investigating this variance can help calibrate stain normalization tasks to reverse this negative potential. With machine learning, this study evaluated the staining variance between different laboratories on three tissue types. We received H&E-stained slides from 66 different laboratories. Each slide contained kidney, skin, and colon tissue sampl…