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Now showing items 4221-4230 of 4316
Poblamiento prehistórico de la península ibérica: dinámica demográfica versus frecuencias del C14
(Aranzadi, 2018)
El trabajo reúne y analiza 1.395 dataciones C14 de la prehistoria ibérica, del lapso cronológico 13000-5000 BP. A partir de ellas se plantea si las mismas sirven para evaluar correctamente el poblamiento tanto a nivel ...
Los sistemas de producción lítica en el Epimagdaleniense y el Sauveterroide del Alto Ebro: El caso del abrigo de Atxoste (Vírgala, Álava, País Vasco)
(Aranzadi, 2015)
En el presente artículo se exponen los resultados principales del análisis tecnológico y de materias primas de la de los niveles VIb2 y VIb del abrigo de Atxoste (Vírgala, Álava), adscritos respectivamente al Epimagdaleniense ...
El abrigo de Martinarri (Obécuri, Treviño): una ocupación del Tardiglaciar en la Cuenca Alta del Ebro
(CSIC, 2012-12-30)
Presentamos el yacimiento de Martinarri, recientemente descubierto en Treviño. Los iniciales trabajos de excavación han evidenciado ocupaciones en el tránsito del Pleistoceno al Holoceno que llenan de contenido un episodio ...
Beta-Hydroxyimino Phosphorus Derivatives. An Efficient Tool in Organic Synthesis
(Bentham Science Publishers, 2011)
[EN] The purpose of this review article is to illustrate synthetic aspects of functionalized phosphorus derivatives containing an oximo moiety at the beta-position. First section will be focused on the synthesis of phosphine ...
La competencia prosódica en la lectura en voz alta: análisis de los aspectos rítmicos
(Pontificia Universidad Católica de Chile, Facultad de Letras, 2013-05-01)
[EN] The current methodological tendencies give particular importance to the teaching of orality.
Thus, several investigations have verified that reading aloud to children contributes positively to their cognitive ...
Poly(ionic Liquid) Thermo-responsive Hydrogel Microfluidic Actuators
(2017-03-14)
tributylhexyl phosphonium sulfopropylacrylate (PSPA) poly(ionic liquid) (PILc) hydrogels as temperature controlled actuators in microfluidic devices. The hydrogel size is modulated by localised changes in its temperature ...
Herritartasuna, immigrazioa eta Euskal Estatua
(Ipar Hegoa fundazioa/Udako Euskal Unibertsitatea, 2012)
Immigrazioak herritartasunarekin, nazioarekin eta estatuarekin lotura zuzena du, eta agerian uzten du kategoria horien izaera eraikia. Hortik abiatuta, immigrazioak Euskal Herrian duen eragina aztertzen da. Lehenik, bertara ...
Chatter avoidance in the milling of thin floors with bull-nose end mills: Model and stability diagrams
(Elsevier, 2011-01)
The milling of thin parts is a high added value operation where the machinist has to face the chatter problem. The study of the stability of these operations is a complex task due to the changing modal parameters as the ...
Towards complex system design and management in the engineering domain – the smart grid challenge
(Lawrence Erlbaum Associates, 2013-06-30)
Our world is facing a significant challenge from climate change and global warming, coupled with an increased awareness about the importance of preserving the environment. This challenge calls for us to use our resources ...
Mathematical development of an average method for estimating the reduction of the Heat Loss Coefficient of an energetically retrofitted occupied office building
(Elsevier, 2019-03-07)
The performance gap between the design energy consumption of buildings and their real energy consumption has three main sources: the energy systems’ performance, the users’ behaviour and the buildings’ envelope performance. ...