Mariana Rodriguez Carrillo

En el proceso de extracción de cloruro de sodio a partir de agua de mar queda una salmuera residual rica en sales de sodio y magnesio que al ser tratadas químicamente y al ser evaporada permite recuperar aproximadamente el 75% del cloruro de sodio que ...

Downloadable! Este trabajo se basa en experiencias vividas durante varios cursos, en diferentes carreras y en diferentes modalidades de estudio. Nuestro objetivo es proponer un sistema de acciones para potenciar la labor educativa, o que permitirá elevar los indicadores de permanencia ...

Downloadable! Al culminar el primer curso de la carrera Ingeniería Industrial en Santiago de Cuba, nos dedicamos a revisar documentos docente-metodológicos y de la Didáctica de la Educación Superior, entre otros, a fin de tratar de esclarecer algunas inquietudes que tuvimos ...

Since his election as Venezuela’s president in 1999, Hugo Chávez has experienced impressive and long lasting support from the majority of Venezuelan citizens. However, crucial defeats in the December 2007 referendum and the November 2008 regional elections have led many to speculate if and why Chávez’s popularity may be waning. Speculation in major news sources is that Venezuela’s alarming and increasing crime and economic problems are taking a toll on Chávez’s public support. Scholars have shown that perceptions of crime and economic well-being significantly affect government legitimacy and democratic stability (Seligson and Boidi 2008). At the same time, those most likely to suffer crime victimization (the poor) and those belonging to the lower socio-economic groups are thought to be key supporters of Chávez’s long tenure in office. This paper examines the relationships between crime and economic insecurities, among both self-reported adherents of Chávez and those opposed, to dete...

This study examined the psychometric properties of an Argentine Version of the Morningness Composite (CS) and the Early/Late Preference (PS) Scales. During summer (long photoperiod in Argentina), 304 subjects (69.1% women; mean age=33.64 yrs, SD=14 yrs) completed the scales for the first time. In winter (short photoperiod), 100 of the same individuals (71% women; mean age=37.17 yrs, SD=14.63 yrs) were retested. The total scores ranged within the values reported by previous studies and were independent of gender. Older subjects showed higher morningness scores. The internal consistencies were good (CS=0.86, PS=0.82). Item 7 from the CS and items 7 and 9 from the PS showed low item-scale correlation. Factor analysis produced a three-factor solution for both scales. However, the inconsistency of the evening items suggests that the single-solution may be more acceptable. Test-retest correlations were satisfactory (CS=0.88, PS=0.78), but the two-related-sample test revealed significant differences between test and retest scores, suggesting relative temporal stabilities. Both scales presented similar and acceptable psychometric properties and good correlation, indicating construct validity.

... Un centinela solar: el Soho. Autores: Mariana López Rodríguez; Localización: Tribuna de Astronomía: Revista de astronomía, astrofísica y ciencias del espacio, ISSN 0213-5892, Nº 37-38, 2002 , págs. 78-83. Fundación Dialnet. Acceso de usuarios registrados. ...