Search results for " norma"
showing 3 items of 623 documents
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…