Search results for "tiles"
showing 10 items of 185 documents
Peer effects in the light of students interactions and the subjective dimensions of school experience
2011
This Thesis addresses the issue of peer-effects in the context of school. From analysis of a large database produced by a Chilean national study (SIMCE 2004), this work investigates the mechanisms through which pupils with different levels of scholastic, human and cultural capital influence each other. These influences seem present for a diverse range of school outcomes, including academic achievement. Drawing on the literature produced by different disciplinary approaches —sociology, economics, social psychology and education— the study focuses on ways of identifying and measuring peer-effects. The presence of subjective dimensions capable of reflecting, in part, the school experience of p…
High sensing potentialities of tetra-tert-butyl-metallophthalocyaninesbased acoustic microsensors for xylenes measurement in air at room temperature
2022
International audience; Xylenes, classified as Volatil Organic Compounds, is a very harmful pollutant for human health that can be absorbed into the body via all exposures routes: inhalation, ingestion, or dermal. As defined by the US Environmental Protection Agency, the occupational exposure limi-tes are set to 100 ppm while the guidelines in non-occupational context are fixed to 50 ppm. For the concentration measurements in the at-mosphere, authorities commonly used sampling methods with post-exposure chemical titration or chromatography. A strong interest remains on the development of low cost, low power consumption and easy implemented microsensors able to deliver real-time indicative m…
Desarrollo de embutidos con menores niveles de nitrificantes inoculados con levaduras seleccionadas para mantener las características sensoriales pro…
2020
Los agentes de curado (nitratos y nitritos) desempeñan funciones importantes en la elaboración de embutidos curado-madurados, entre las que se encuentra el desarrollo del aroma característico de estos productos. El uso exclusivo de nitrato, de nitrito o de una mezcla de los dos, puede tener diferente repercusión en el perfil aromático. Sin embargo, existe una tendencia a la reducción del uso de estos aditivos por su relación con la generación de N-nitrosaminas que ha hecho que en los últimos años exista una gran preocupación a nivel de los consumidores. Por ello, en la presente tesis doctoral se ha estudiado el efecto que produce la reducción de la cantidad añadida de nitrato o de la mezcla…
Innovative and Applied Research in Biology: Proceedings, Vol.1
2019
Projekti: ZD2016/AZ81 & ZD2016/AZ107
The marine diapsid reptile Endennasaurus from the Upper Triassic of Italy
2005
The marine reptile Endennasaurus from the Upper Triassic Zorzino Limestone of northern Italy is rede- scribed and reassessed. New details of the skull and postcra- nial skeleton are revealed, confirming the attribution of this genus to the diapsid reptile clade Thalattosauriformes. Phylo- genetic analysis suggests that Endennasaurus was related to the European genus Askeptosaurus and the Chinese Anshun- saurus. Despite a rather conservative postcranial morphology, Endennasaurus clearly occupied a highly specialized dietary niche as it combined a slender tapering premaxillary rostrum with a complete absence of either marginal or palatal teeth.
Magma and volatile supply to post-collapse volcanism and block resurgence in Siwi caldera (Tanna Island, Vanuatu arc)
2011
Siwi caldera, in the Vanuatu arc (Tanna island), is a rare volcanic complex where both persistent eruptive activity (Yasur volcano) and rapid block resurgence (Yenkahe horst) can be investigated simultaneously during a post-caldera stage. Here we provide new constraints on the feeding system of this volcanic complex, based on a detailed study of the petrology, geochemistry and volatile content of Yasur-Siwi bulk-rocks and melt inclusions, combined with measurements of the chemical composition and mass fluxes of Yasur volcanic gases. Major and trace element analyses of Yasur-Siwi volcanic rocks, together with literature data for other volcanic centers, point to a single magmatic series and p…
Measuring the market power in the ceramic tile industry: An international comparison
2004
This paper measures the degree of competition faced by Spanish and Italian exporters of ceramic tiles in several European Union member states. The results indicate that Spanish producers have a substantial market power while Italian exporters face a high degree of competition. This finding is consistent with the significant gain (loss) in the world production and export shares that Spanish (Italian) producers experienced during the 1990s. The results are also consistent with accounting data. Furthermore, comparisons in the extent of market power across source countries and European destination markets reveal that most variation in the data is related to the source country. JEL no. F12, F14,…
La distribution des tuiles estampillées de la VIIIe légion Augusta autour de Mirebeau-sur-Bèze (Côte-d'Or, France)
2011
The 8th Augustan Legion was installed at Mirebeau-sur-Bèze (Côte-d'Or) after 70 AD following the troubles that arose with the Lingons. It remained there until the time of Domitian, a period of roughly twenty years, during which time the soldiers produced tiles stamped with the name of the legion. Analysis of the dispersion of the tiles in the region around Mirebeau shows that they followed the communication routes. Consideration of the contexts in which these tiles were used, their number on each site and the resources necessary to manufacture them reveals that the 8th Legion may have played a significant role in the diffusion and adoption of tiled roofs, a construction technique that was t…
Atmospheric Oxidation Reactions of Methyl Salicylate as Green Leaf Volatiles by OH Radical: Theoretical Kinetics and Mechanism
2020
Modelación del proceso de biofiltro percolador para el tratamiento de emisiones en aire de Compuestos Orgánicos Volátiles de elevada solubilidad en a…
2016
La contaminación del aire producida por las emisiones a la atmosfera de compuestos orgánicos volátiles (COV) es una de las causas más importantes asociadas al deterioro de la calidad ambiental. Una de las fuentes principales de emisión de COV son las industrias que utilizan disolventes. En este sentido, las industrias deben hacer un esfuerzo por adaptar sus procesos productivos para minimizar el impacto ambiental. Sin embargo, las propiedades de los disolventes los convierten en indispensables en algunas aplicaciones por lo que el tratamiento de las emisiones derivadas de su uso se convierte en una necesidad. El uso de biofiltros percoladores para la depuración de COV de elevada solubilidad…