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Copyright of CIVILIZAR: Ciencias Sociales y Humanas is the property of Universidad Sergio Arboleda and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Alpha: Revista de Artes, Letras y Filosofía is the property of Universidad de Los Lagos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Dilemas Contemporáneos: Educación, Política y Valores is the property of Dilemas Contemporaneos: Educacion, Politica y Valores and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Taking into account that a number of empirical research regarding language use and attitudes has been centered in the Southwest and, to a lesser extent, in other areas such as New York, few studies have been conducted in Florida. In this paper, I report on the responses of 140 Spanish Heritage college students from Florida to a questionnaire about how regularly they use Spanish and English. In order to establish the reliability of the responses to the questionnaires and to get a more in-depth knowledge of the causes for language shift or/and maintenance, 89 participants were interviewed. The results revealed that interlocutors' sociolinguistic profile play a mayor role when selecting English or Spanish. For instance, English is the language of preference with some family members and neighbors, although Spanish, to a lesser extent, is also used. The majority of participants stated that Spanish is the language used when interacting with family members who are not proficient in English such as grandparents [ABSTRACT FROM AUTHOR]

Copyright of Revista Uruguaya de Ciencia Política is the property of Instituto de Ciencia Politica (Universidad de la Republica de Uruguay) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The main purpose of the present paper was to determine the multi-variable models to predict the Efficiency of Nickel reduction with greater effectiveness, when varying the chemical-mineralogical composition of lateritic ores in the Herreshoff furnaces. The research was made in a Loza (8 furnaces) of Punta Gorda Plant for working periods of 8 hours during three months. The data bases and their statistical processing were made in EXCEL. As a result, several multi-variable models were obtained , with effectiveness of prognosis superior than 95 %; the high effectiveness to predict the Efficiency of Nickel reduction was demonstrated when organizing the procedure of filtering Data Base by intervals of Limonite: Serpentine ratio (R5); it was confirmed the validity of the procedure of filtering Data Base to adjust the multi-variable models in the particular case of reduction roasting of lateritic ores, which can be employed to create an integrated software for its use in real time with the information in the INTRANET of Plant; it was explained the regularity in the signs and values behaviour of regression and correlation coefficients when comparing the best models of chemical and mineralogical Data Bases, with emphasis on the contradictions of the Ni variable, as well as the variables of Fe, Al and its minerals. [ABSTRACT FROM AUTHOR]

The anuran family Rhinophrynidae today comprises a single species restricted to southernmost Texas and Central America. Three extinct genera allied to this family are known from the Jurassic (Rhadinosteus) and Eocene (Chelomophrynus, Eorhinophrynus), whereas the sole extant genus Rhinophrynus is known from the latest Eocene (Chadronian) of Saskatchewan and the Pleistocene of Mexico. We provide the first records of the Rhinophrynidae from the Oligocene of eastern North America. From two of the oldest terrestrial vertebrate sites on the Florida peninsula (1-75, early Oligocene; Brooksville 2, late Oligocene), we have identified one nearly complete and several partial humeri, two radioulnae, two partial presacral vertebrae, three partial ilia, and one femur that are all referable to the Rhinophrynidae. These specimens are similar in size to the Eocene Rhinophrynus canadensis, smaller than the extant R. dorsalis, and might be distinguishable from both by features of the ilium and humerus. The presence of rhinophrynids during the Oligocene provides the first indication of change in the anuran fauna on the Florida peninsula during the Cenozoic. [ABSTRACT FROM AUTHOR]