Search results for "PC"
showing 10 items of 2805 documents
Automatic regrouping of strata in the goodness-of-fit chi-square test
2019
Pearson’s chi-square test is widely employed in social and health sciences to analyze categorical data and contingency tables. For the test to be valid, the sample size must be large enough to provide a minimum number of expected elements per category. This paper develops functions for regrouping strata automatically no matter where they are located, thus enabling the goodness-of-fit test to be performed within an iterative procedure. The functions are written in Excel VBA (Visual Basic for Applications) and in Mathematica. The usefulness and performance of these functions is illustrated by means of a simulation study and the application to different datasets. Finally, the iterative use of …
"Desde la teoría y para la acción": la Transición en los artículos de José Vidal-Beneyto publicados en El País (1976-1996)
2015
A PCA-based clustering algorithm for the identification of stratiform and convective precipitation at the event scale: an application to the sub-hour…
2021
AbstractUnderstanding the structure of precipitation and its separation into stratiform and convective components is still today one of the important and interesting challenges for the scientific community. Despite this interest and the advances made in this field, the classification of rainfall into convective and stratiform components is still today not trivial. This study applies a novel criterion based on a clustering approach to analyze a high temporal resolution precipitation dataset collected for the period 2002–2018 over the Sicily (Italy). Starting from the rainfall events obtained from this dataset, the developed methodology makes it possible to classify the rainfall events into f…
Se combida a los Devotos de Maria Santissima, que quisieren acompañar la Imagen de la Assumpcion de esta Divina Señora à su Convento de San Juan de R…
Com a tít. el començament del text Banda
Letania de la Assumpcion de Maria santissima
El f. orlat Text a tres col. separades per bandes
Por el Real Monasterio Benedictino Cisterciense de Nuestra Sra. de Poblèt ... Fray Geronimo Villar ... Presidente mayor de la Real Casa Priorato de …
1750
Signat al final: "D. Joaquin Antonio Salon" Port. orlada Escut calc. del Monestir de Poblet a la port Caplletra ornada al començament del text Sign.: [ ]1, [A]2, B-C2, E-F2 Notes al marge i envoltant el text Reclams
De la violencia a la ética pasando por Madonna
1995
School administrators’ perceptions of democratic coexistence in Catalan schools: An analytical study
2022
In democratic societies, education should help build a participative, critical and responsible citizenry and therefore promote the role of schools as settings where students learn democratic coexistence. With the study reported on here we aimed to analyse how coexistence is fostered in classrooms and schools, as well as the possible synergy between schools’ efforts to educate in democratic coexistence, and the children’s social participation in their setting. To do so, we focused on the perspective of 476 school administrators at schools in Catalonia (Spain) based on an ad-hoc questionnaire comprised of 22 items on a Likert scale. The results reflect settings that value democratic coexisten…
Enhancement of the Lifetime of Metastable States in Er-Doped Si Nanocrystals by External Colored Noise
2015
The changes in the lifetime of a metastable energy level in Er-doped Si nanocrystals in the presence of an external source of colored noise are analyzed for different values of noise intensity and correlation time. Exciton dynamics is simulated by a set of phenomenological rate equations which take into account all the possible phenomena inherent in the energy states of Si nanocrystals and Er^{3+} ions in the host material of Si oxide. Electronic deexcitation is studied by examining the decay of the initial population of the Er atoms in the first excitation level 4I_{13/2} through fluorescence and cooperative energy transfer upconversion. Our results show that the deexcitation process of th…
Evidencias psicométricas de una medida breve de resiliencia en adultos mayores peruanos no institucionalizados
2018
Resumen: La resiliencia es comprendida como el dominio de recursos personales y factores contextuales que permiten un afrontamiento exitoso y el logro de una adaptación positiva ante los diferentes estresores que aparecen a lo largo de la vida, siendo así importante dentro del proceso de envejecimiento saludable y exitoso. En la actualidad se han desarrollado instrumentos breves para la medición de la resiliencia como la escala breve de resiliencia (BRCS - Brief Resilient Coping Scale) que evalúa la capacidad de los individuos para hacer frente al estrés de manera adaptativa. En este sentido, el estudio ofrece evidencia de validez y fiabilidad de la BRCS en adultos mayores no institucionali…