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DIALNET OAI Articles (759,804 recursos)
Dialnet (Difusión de Alertas en la Red) es una plataforma de recursos y servicios documentales, cuyo objetivo fundamental se centra en mejorar la visibilidad y el acceso a la literatura científica hispana a través de Internet.

Geociencias. Medio ambiente

Mostrando recursos 1 - 20 de 6,255

1. La Iª Conferencia Internacional sobre Educación y Formación en Geociencias - Lillo Beviá, José; Anguita Virella, Francisco

2. La historia de la geología y su potencial educativo: una reflexión desde América Latina - Figueiroa, Silvia F. de M.; Lopes, María Margaret

3. El continente perdido - Anguita Virella, Francisco

4. La Historia de la Geología como hilo conductor de una unidad didáctica: tectónica de placas - García Cruz, Cándido Manuel

5. Una aproximación didáctica a la naturaleza de la Ciencia a través de los textos hsitóricos - Rebollo Bueno, Manuel

6. La utilización de la Historia de la Ciencia para trabajar problemas relacionados con los fósiles - Borrego Aguayo, María Josefa; Guede, Benigno; Menéndez, Esther; Pacheco, Flora; García, Ramón

7. Epistemología e Historia de la Geología como fuentes para la selección y organización del curriculum - Companí, Maurício; Wagner Gonçalves, Pedro

8. Epistemología e Historia de la Ciencia: contribuciones a la planificación didáctica: la deriva continental - Praia, Joâo Félix

9. Darwin como geólogo: sugerencias para la enseñanza de Ciencias de la Tierra - Sequeiros San Román, Leandro

10. Que puede aportar el conocimiento de la historia de la geología a los profesores en formación - Domingo Morató, Montserrat; Ambrós, Sonia

11. Construcción del conocimiento científico: algunos ejemplos de Geociencias - Marqués, Luis

12. Por su historia la conocerán - Pedrinaci Rodríguez, Emilio

13. Propuesta metodológica para la selección, evaluación y conservación de sitios geológicos - caso de estudio estado Falcón - Yanes, Soraya
This paper consisted of the implementation of a methodology (modified from Bruschi, 2007) for the selection, evaluation and conservation of sites of geological interest in Falcón State. It is a contribution to the knowledge about the variety of the Falcón region, known only by scientific research on its stratigraphy, paleontology, tectonics among others, but not by the delimitation of sites with potential interest for Geology. Thanks to the support of experts from different geological disciplines with knowledge about Falcón State, a list of 28 sites in Falcón that were subject to evaluation through direct and indirect procedures to calculate the...

14. Nuevo registro de tres especies de Orthaulax (Gastropoda:Strombidae) en las formaciones San Luis y Patiecitos del Oligoceno tardío – Mioceno temprano en el estado Falcón, Venezuela - Macsotay, Oliver; Olivares, Isabel
Until now, the genus Orthaulax has been considered as absent from the Oligo-Miocene basins of South America. On the other hand, it proliferated in the infralittoral environments from the calcareous platforms of the Greater and Lesser Antilles, whose development was influenced by the predominance of plankton-rich and oxygen-rich warm waters entering from the Pacific Ocean. However, in the Venezuelan basins, characterized by muddy sediments, zoned marine waters and the lack of carbonates; six fossil specimens were found and assigned to Orthaulax aguadillensis, O. conoides and O. inornatus, belonging to the family Strombidae, also representing all growth stages and with high...

15. Análisis variográfico de los porcentajes de sílice, alúmina, pérdida por calcinación, fósforo y manganeso en las menas de mineral de hierro del cerro San Joaquín, municipio bolivariano Angostura, estado Bolívar - Araya, Luis; Llatas, Isabel
TThe purpose of this paper is to analyze the variograms of chemical variables that accompany iron ore present in the Cerro San Joaquin, Ciudad Piar, Bolívar state. The data used correspond to campaigns conducted exploratory wells on the hill above. The methodology used in this study was first exploratory statistical analysis of the chemical composition of the ores. Then Variogram map is constructed to detect the directions of anisotropy, and the experimental variograms were calculated on the primary and secondary directions for each variable. Finally, theoretical variogram models were fitted in the obtained experimental variograms. The results show that the...

16. Inferencia de velocidades de ondas S mediante la técnica de redes neuro-difusas - Coronado, Ronal; Hurtado, Nuri; Aldana, Milagrosa
In this work we use neuro fuzzy system (NFS) in order to obtain inference equations of shear velocity (Vs) of a well in terms of the logarithmic of its porosity (φ), its water saturation (Sw) and its clay volume (Vsh) data. The data belong to a well of the Guafita Field located in the Sub-basin of Apure, Venezuela. For training of NFS were used as input values: φ, Sw, Vsh; and Vs a s output. The training was made with multiple combinations of the independent parameters φ, Vsh and Sw. The results suggest that the use of the three types...

17. Formulación de un fluido de perforación base diesel de bajo impacto ambiental - Correía, Joseph; Godoy, Génesis; García González, Mario; Vega, Rubén
Drilling fluids must possess chemical and physical properties that allow conditioned at the location of each perforation, this without impairing the environmental sensitivity of the surrounding wellbore. The oil-based fluids have been uself for its many advantages, but these were originally formulated with diesel as a base compound with high concentration of aromatic compounds (28%), the latter with a representative degree of contamination to both humans and the environment environmental. That is the why cleaner bases have emerged such as synthetic oils, but with the disadvantage of high cost have emerged. Considering previously described, was aimed to find the best...

18. Medición de gas radón en un segmento de la Falla de Boconó, estados Táchira y Mérida. - Rengifo, Martín; Aranguren, Reina; Laffaille, Jaime; Ferrer, Carlos; Audemard M., Franck A.
A survey of total radon soil gas have been accomplished on the Boconó fault in the Merida Andes, where a segment of this active fault of ~170 km long, between the city of La Grita, in the Táchira state, and the Santo Domingo village, in Mérida state, was considered. Measurements of soil gas were taken along traverse lines perpendicular to the trace using a portable radiation monitor. The aim of this work is to characterize the diverse provinces traversed by this active fault, as well as, to evaluate the response of the method in different geological – geomorphological site conditions...

19. Cartografía neotectónica de la Falla de Boconó entre Tabay y La Toma, Mérida - Venezuela. - Alvarado, Miguel; Cantos, Gabriela; Pérez, Edwin; Audemard M., Franck A.
The Boconó fault is the most important and distinctive geological feature of western Venezuela. It runs for more than 500 km in the southeast-northwest direction with significant implication on the complex structure of the venezuelan Andes. Between the towns of Tabay and La Toma of Mérida state, it have been identified some segments of the fault parallel to the valley of Chama river. The overall geometry is rectilinear with the Chama basin located over the trace of the fault. This work attempts to describe the persistence and consistence of the geomorphological traits that have been produced by the most recent...

20. Velocidades de las estaciones SIRGAS2000 sobre las placas del Caribe y Suramericana aplicando los modelos de la UNAVCO y VEMOS2009 - Liberal, Luis M.
This work is aimed at determining velocities of a set of SIRGAS2000 stations located in the Caribbean and South American plates, based on the different solutions provided by UNAVCO and VEMOS2009 models and calculations. Velocity vectors obtained from these models are used to transform the coordinates of the national and continental network stations, which will support new stations, once the observations from the Global Navigation Satellite System (GNSS) are adjusted and transformed through the International Terrestrial Reference Framework (ITRF) in which they are ultimately expressed. Mean velocities of the SIRGAS2000 stations on the Caribbean plate in MORVEL2010 are 19.08 +...

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