7,520 research outputs found
Deliry C, Grangier C. et Quesada R., 2004 -Catalogue des plantes vasculaires de l'isle Crémieu
No full textMein Marie-Thérèse. Deliry C, Grangier C. et Quesada R., 2004 -Catalogue des plantes vasculaires de l'isle Crémieu . In: Bulletin mensuel de la Société linnéenne de Lyon, 74ᵉ année, n°4, avril 2005. p. 126
Conmemoración de Don Gonzalo Jiménez de Quesada
No full textConmemoración de Don Gonzalo Jiménez de Quesada
Visualizing the Marrow of Science
No full textThis study proposes a new methodology that allows for
the generation of scientograms of major scientific domains,
constructed on the basis of cocitation of Institute
of Scientific Information categories, and pruned using
PathfinderNetwork, with a layout determined by algorithms
of the spring-embedder type (Kamada–Kawai),
then corroborated structurally by factor analysis. We
present the complete scientogram of the world for the
Year 2002. It integrates the natural sciences, the social
sciences, and arts and humanities. Its basic structure
and the essential relationships therein are revealed,
allowing us to simultaneously analyze the macrostructure,
microstructure, and marrow of worldwide scientific
output
Showing the essential science structure of a scientific domain and its evolution
No full textCategory cocitation and its representation through social networks is proving to be a very adequate technique for the visualization and
analysis of great scientific domains. Its combination with pathfinder networks using pruning values r=∞and q=n−1 makes manifest the essence of research in the domain represented, or what we might call the `most salient structure'. The possible loss of structural information, caused by aggressive pruning in peripheral areas of the networks, is overcome by creating heliocentric maps for each category. The depictions obtained with this procedure become tools of great usefulness in view of their capacity to reveal the evolution of a given scientific domain over time, to show differences and similarities between different domains, and to suggest possible new lines for development. This article presents the scientogram of the United States for the year 2002, identifying its essential structure. We also show the scientograms of China for the years 1990 and 2002, in order to study its particular national evolution.
Finally, we try to detect patterns and tendencies in the three scientograms that would allow one to predict or flag the evolution of a scientific domain
Curso de economía política: Conferencia inaugural (Marzo 19 de 1907)
No full textFil: Quesada, Ernesto. Facultad de Ciencias Juridicas y Sociales, Universidad de La Plata
Quesada gigas
No full text<p> <i>Quesada gigas</i></p> <p> foi observada em 30 hospedeiros. Dentre as frutíferas, está associada a abacateiro, abieiro, cacaueiro, tamarindeiro e lechia. Com relação as ornamentais e florestais destacam-se: angico, cabriúva, cássia imperial, ipê-amarelo, jacarandá, mogno e seringueira. Eta espécie é mencionada na literatura associada a esponjeira (RUFFINEILI, 1970), angico (HEINRICH & PUPIN NETO, 1964), cacaueiro (MARTINELLI <b>et</b> al., 1986) e cafeeiro (FONSECA & ARAÚJO, 1939). Com exceção do angico e cacaueiro já referidos na literatura, são encontradas também como hospedeiras de <i>Q</i>. <i>gigas</i> no Campus de Jaboticabal; as demais plantas hospedeiras mencionadas, são referidas pela primeira vez <b>(Tabela 1).</b></p>Published as part of <i>Martinelli, Nilza Maria & Zucchi, Roberto Antonio, 1997, PRIMEIROS REGISTROS DE PLANTAS HOSPEDEIRAS DE Fidicina mannifera, Quesada gigas E Dorisiana drewseni (Hemiptera - Cicadidae), pp. 271-281 in Revista de Agricultura 72 (3)</i> on page 273, DOI: <a href="http://zenodo.org/record/10114596">10.5281/zenodo.10114596</a>
The Cambrian-Early Ordovician Rift Stage in the Gondwanan Units of the Iberian Massif. In: Quesada C., Oliveira J. (eds) The Geology of Iberia: A Geodynamic Approach, Vol.2, Cap.2
No full textA rifting stage initiated the Variscan cycle in NW Gondwana, lasted from Terreneuvian to Early Ordovician times and culminated in opening of the Rheic Ocean. The result of lithospheric stretching was the development of a horst-and-graben structure in the upper crust and formation of basins with sharp variations in thickness and facies of the sedimentary infill. Emplacement of large volumes of igneous rocks, both plutonic and volcanic, accompanied this stage in three different intervals: (i) Early Igneous Event (Terreneuvian), exclusively composed of felsic peraluminous rocks associated with the formation of core complexes in the mid-upper crust; (ii) Main Igneous Event (Cambrian Series 2 to Furongian), displaying bimodal character; and iii) Late Event (Tremadocian-Floian), with mixed characteristics of the other two events and abundant peralkaline rocks. The rifting axis was initially located close to the Cadomian suture that fringed the Ossa Morena Zone. For about 60 m.y. the rifting processes initially propagated “zip-like” along the axis and then widened cratonward to affect inner parts of Gondwana, such as the Central Iberian Zone. The rift/drift transition was diachronous, starting in Iberia (Ossa Morena Zone) in the Furongian
Variscan Magmatism. In: Quesada C., Oliveira J. (eds) The Geology of Iberia: A Geodynamic Approach, Vol. 2, Cap. 13
No full textThis chapter aims to identify, characterize and locate the main facts/events related to orogenesis in the Iberian Peninsula. Its succession in space and time determines the geodynamic environment of the broader geological phenomenon corresponding to the Variscan cycle. In this sense, this section comprises two parts: I—The Iberian orogenic magmatism seen through a space-time approach of its westernmost region—focus on the enormous complexity of the inherited basement, its nature, age and distribution in space. Establishes a space-time sequence of geodynamic environments correlated with the obtained data and tries to identify the agents responsible for its genesis. Some case studies are presented to illustrated significant regional aspects of the magmatic process and II—An overview of the petrogenesis of the great batholiths and of the basic, intermediate and mantle-related rocks—identify and analyze a great amount of these rocks intruding and extruded from 400 to 280 Ma and to better understanding the large-scale process involving the whole lithosphere during Variscan cycle
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