71 research outputs found
Saber, sen i trobar: Ramon de Cornet i el Consistori de la Gaia Ciència
No full textThe study of 14th-century Occitan poetry has been overshadowed by its alleged subjection to the
poetics of the contests organized by the Toulousain Consistory of the Gay Science. Moreover,
most scholars have criticized the Consistory for trying to impose an excessively contrived poetic
form, coupled with moral or pious contents, in compliance with Christian orthodoxy. The few
authors from that century who do not completely match that framework, such as Ramon de
Cornet – paradoxically, the author with a greater amount of preserved works and with a wider
diffusion - are considered an exception and even, in his case, an eccentric figure. But when
studying Cornet within his most immediate literary context, it becomes apparent that 14th century
poetics are the natural evolution of the late troubadour tradition and are in no way limited to the
alleged consistorial pressures. This can be illustrated by Ramon de Cornet’s “Al noble cavalier”Sovint l’estudi de la lírica occitanocatalana del segle xiv ha estat supeditat a la poètica de certamen
que gravita a l’entorn del Consistori del Gai Saber de Tolosa de Llenguadoc. A aquest fet, cal
sumar-hi el judici pejoratiu que gran part de la crítica ha formulat sobre el Consistori, atribuintli la voluntat d’imposar una forma artificiosa acompanyada d’un contingut moral o devot que
s’avingués amb l’ortodòxia cristiana. Els pocs autors conservats de l’època que no es podien
encabir del tot en aquest marc, com ara Ramon de Cornet –paradoxalment l’autor amb més obra
conservada de la primera meitat del Tres-cents i amb una difusió més àmplia–, són considerats
una excepció i fins i tot, en el cas de Cornet, d’estrafolari. Però si estudiem la seva obra en el
marc de la tradició literària més immediata, la dels darrers trobadors, veurem com la poètica del
XIV és una evolució natural d’aquest llegat, que respon a unes exigències de gust literari que va
molt més enllà de les suposades coaccions consistorials. Una mostra d’això és la peça "Al noble
cavalier" de CornetAquest article forma part del projecte CODITECAM III Corpus Digital de Textos Catalans Medievals III, amb el
suport del Ministerio de Ciencia e Innovación, Universitat de Girona (FFI2011-27844-C03-02, Sadurní Martí IP).
L’autora és becària de la Fundació La Caixa i l’Ambaixada de França a Espanya. Aquest article és una versió ampliada
de la comunicació presentada a “Els espais del coneixement I Congrés Internacional ARDIT de Medievalistes
Predoctorals”, celebrat a Barcelona del 14 al 16 de novembre de 201
La materialización de ideas: realidades, necesidades, oportunidades, encuentros y desencuentros
No full textDado el nivel de actuación que han tenido en nuestra historia y pueden tener en la época actual los materiales, se presenta en este trabajo un análisis de la realidad de quien trabaja con los mismos ya sea buscando un acercamiento emocional, un ambiente más sostenible o una nueva tecnología. Se pretende: conocer la importancia de los materiales; contextualizar el trabajo de diseñadores, arquitectos, ecologistas y científicos en relación a los materiales; detectar materiales innovadores; caracterizar las aplicaciones y prestaciones de los materiales encontrados y descontextualizar algunos de ellos; determinar la relación material-sostenibilidad-innovación; implementar conceptos innovadores en el desarrollo de producto; estudiar las necesidades que los diferentes perfiles de profesionales plantean frente a un sistema de gestión e información como Mater, Centro de Materiales (FAD. Fomento de las Artes y del Diseño).Donat el nivell d’actuació que han tingut a la nostra història i poden tenir a l’època actual els materials, aquest treball presenta una anàlisi de la realitat de qui treballa amb aquests, ja sigui buscant un apropament emocional, un ambient més sostenible o una nova tecnologia. Es pretén: conèixer la importància dels materials; contextualitzar el treball dels dissenyadors, arquitectes, ecologistes i científics en relació als materials; detectar materials innovadors; caracteritzar les aplicacions i prestacions dels materials trobats i descontextualitzar alguns d’ells; determinar la relació material-sostenibilitat-innovació; implementar conceptes innovadors en el desenvolupament del producte; estudiar les necessitats que els diferents perfils de professionals plantegen de cara a un sistema de gestió i informació com Mater, Centre de Materials (FAD. Foment de les Arts i del Disseny)
Combined use of the GGSFT data base and on Board Marine Collected Data to Model the Moho Beneath the Powell Basin, Antarctica
No full textThe Powell Basin is a small oceanic basin located at the NE end of the Antarctic Peninsula developed during the Early Miocene and mostly surrounded by the continental crusts of the South Orkney Microcontinent, South Scotia Ridge and Antarctic Peninsula margins. Gravity data from the SCAN 97 cruise obtained with the R/V Hespérides and data from the Global Gravity Grid and Sea Floor Topography (GGSFT) database (Sandwell and Smith, 1997) are used to determine the 3D geometry of the crustal-mantle interface (CMI) by numerical inversion methods. Water layer contribution and sedimentary effects were eliminated from the Free Air anomaly to obtain the total anomaly. Sedimentary effects were obtained from the analysis of existing and new SCAN 97 multichannel seismic profiles (MCS). The regional anomaly was obtained after spectral and filtering processes. The smooth 3D geometry of the crustal mantle interface obtained after inversion of the regional anomaly shows an increase in the thickness of the crust towards the continental margins and a NW-SE oriented axis of symmetry coinciding with the position of an older oceanic spreading axis. This interface shows a moderate uplift towards the western part and depicts two main uplifts to the northern and eastern sectors
VSAD - Dataset
No full textThis dataset contains the data from :
Lacroix, E., Cornet, S., Deggouj, N., Edwards, M. “Visuo-Spatial
Abilities Diagnosis - Test (VSAD): Evaluate the potential cognitive
difficulties of children with vestibular impairment through a new tablet-based
computerised test battery”.
(Currently in submission)
Data have been generated with the VSAD-Test using the Metrisquare
DiagnosIS software (www.metrisquare.net).
Access to the test is free of charge but requires author approval.
Contact us for a
request to use the VSAD: [email protected]; [email protected]</div
Advanced seismic methods applied to the study of snow avalanche dynamics and avalanche formation
No full textSnow avalanches are extended moving sources of infrasonic and seismic energy. The acoustic and seismic wave fields generated by an avalanche is a complex natural phenomenon produced by the interaction of the flow with its environment. Seismic waves are mainly generated by friction and the impacts of the flow on the snow cover and terrain features; whereas the infrasound waves are generated by the interaction of the powder cloud with the air. Nowadays, avalanches are recorded using seismic and infrasound sensors that provide data that can be used to obtain information about the characteristics of the source and the basis processes that govern avalanche dynamics such as erosion and deposition. So far, the knowledge of how all these dynamical processes and the inherent characteristics of avalanches affect the signatures of the signals is limited and thus more quantitative data are require. Additionally, seismic and infrasonic monitoring systems can provide information on the avalanche triggering mechanisms such as, for example, the shaking produced by an earthquake. Few earthquake-generated avalanches have been documented to date, all of them visually or statistically identified. Hence, a complete dataset of such events does not exist.
This study aims to enlarge the current application of seismic methods, mainly for snow avalanche research, which in turn, is relevant to improve monitoring systems. A catalogue of thirty-three snow avalanches of different natures is analysed using the seismic signals recorded with a set of seismic sensors at the Vallée de la Sionne test site in Switzerland. A comparative analysis of the seismic measurements and data acquired with other instrumentation such as infrasound sensor, several frequency-modulated continuous wave radars, and weather stations, is presented in each case to complement and validate the results.
This thesis presents novel contributions using seismic methods in the research field of avalanche dynamics and in the field of avalanche formation, specifically in the field of avalanche induced by earthquakes. As a first step, the joint analysis of seismic and infrasound data, correlated with radar measurements, provides data of the onset of an avalanche with the arrival of an earthquake. Seismic data were used to quantify energy parameters and changes in the elastic stress field within the snowpack due to the earthquake. This event was compared with two stronger earthquakes that did not trigger any avalanche. The study was complemented by nivo-meteorological data and snow cover simulations. I conclude that when the snowpack is only marginally stable, then the displacement caused by even a small earthquake could be enough to trigger an avalanche. In addition, the analysis of the other two, even stronger, earthquake shows that in stable conditions no avalanche was triggered.
Furthermore, in order to better understand the connection between seismic signals and avalanche dynamics, I quantify the seismic signals in a set of seismic indices. For each seismic signal, the duration, peak ground velocity of the envelope, and both the
intensity and the frequency content were compared with the avalanche flow regimes and the thicknesses of the snow cover measured using radar measurements, as well as with the avalanche size. The frequency content of the seismic signal can be used to infer the avalanche flow regime and to characterize its internal parts. Furthermore, the seismic signal duration can be correlated to the avalanche size. If the snow cover absorption does not significantly weaken the intensity of the signal, the avalanche size can also be deduced from the peak ground velocity and its intensity. These results show that avalanche characteristics can be feasible inferred using only seismic data. Such analysis can be usefully employed in avalanche monitoring and management.Las avalanchas de nieve son extensas fuentes móviles de energía sísmica e infrasónica. El campo de ondas acústicas y sísmicas generado por ellas es un fenómeno natural complejo producido por la interacción del flujo con su medio ambiente. Actualmente, las avalanchas son monitorizadas mediante sensores sísmicos y de infrasonido proporcionando datos para caracterizar las avalanchas y los procesos dinámicos que las gobiernan. Además, estos sistemas de monitoreo también proporcionan información sobre los mecanismos de desencadenamiento de avalanchas tales como, por ejemplo, las vibraciones producidas por terremotos.
El objetivo de este tesis es ampliar las aplicaciones actuales de los métodos sísmicos principalmente para investigar avalanchas de nieve, y que a su vez, los resultados sean relevantes para mejorar los sistemas de monitoreo actuales. Se analiza un catálogo de treinta y tres avalanchas de nieve registradas mediante sensores sísmicos en el sitio de test de Vallée de la Sionne (Suiza). Un análisis comparativo de los datos sísmicos y datos adquiridos con otra instrumentación (datos de infrasonido, radares de frecuencia modulada y estaciones meteorológicas) se presenta en cada caso para complementar y validar los resultados de la tesis.
Los resultados obtenidos presentan aportaciones novedosas dentro del campo de investigación de la dinámica de avalanchas de nieve y de su formación, específicamente en el campo de avalanchas inducidas por terremotos. En este campo, se analiza un conjunto de datos únicos de una avalancha que coincide temporalmente con un terremoto, evaluando la posibilidad de ser o no desencadenado por las vibraciones generadas por el terremoto. En el campo de investigación de la dinámica de avalanchas, se ha realizado una parametrización de las señales sísmicas de un catálogo de avalanchas de diferente naturaleza. La cuantificación de las señales sísmicas en el conjunto de índices definidos permite inferir directamente características dinámicas de las avalanchas de nieve
Inversión numérica 3D de datos gravimétricos procedentes de campañas marinas y de satélite. Aplicación a un área antártica
No full textSe presenta la modelización gravimétrica de la corteza oceánica en la zona de central del Pasaje del Drake, en la Fractura Shackleton (Antártida) a modo de ejemplo de aplicación de inversión numérica en 3D de datos de gravedad discutiendo los métodos utilizados. Los datos tratados corresponden a una campaña realizada por el barco oceanográfico español Hespérides y a la base «Global Gravity Grid and Global Sea Floor Topography» (GGSFT) (Sandwell y Smith, 1997). Se comentan y analizan las limitaciones de aplicación del Método de Factorización Espectral (Spector y Grant, 1970) que permite separar la contribución de las distintas fuentes de la anomalía de gravedad. En particular, en el caso de datos marinos y satelitales que hemos utilizado se considera el efecto negativo en el espectro radial de la mezcla indiscriminada de datos de diverso origen. Se comenta, también, el método de inversión utilizado basado en Parker (1973) y la utilización de la corrección de placa de agua (WPC) aplicada a la anomalía de Aire libre para la obtención de la anomalía Total, punto de partida del proceso de inversión
Inversión numérica 3D de datos gravimétricos procedentes de campañas marinas y de satélite. Aplicación a un área antártica
No full textSe presenta la modelización gravimétrica de la corteza oceánica en la zona de central del Pasaje del Drake, en la Fractura Shackleton (Antártida) a modo de ejemplo de aplicación de inversión numérica en 3D de datos de gravedad discutiendo los métodos utilizados. Los datos tratados corresponden a una campaña realizada por el barco oceanográfico español Hespérides y a la base «Global Gravity Grid and Global Sea Floor Topography» (GGSFT) (Sandwell y Smith, 1997). Se comentan y analizan las limitaciones de aplicación del Método de Factorización Espectral (Spector y Grant, 1970) que permite separar la contribución de las distintas fuentes de la anomalía de gravedad. En particular, en el caso de datos marinos y satelitales que hemos utilizado se considera el efecto negativo en el espectro radial de la mezcla indiscriminada de datos de diverso origen. Se comenta, también, el método de inversión utilizado basado en Parker (1973) y la utilización de la corrección de placa de agua (WPC) aplicada a la anomalía de Aire libre para la obtención de la anomalía Total, punto de partida del proceso de inversión
Fractal dimension versus density of the built-up surfaces in the periphery of Brussels.
No full textThis paper aims at showing the usefulness of the fractal dimension for characterizing the spatial structure of the built-up surfaces within the periurban fringe. We first discuss our methodology and expectations in terms of operationality of the fractal dimension theoretically and geometrically. An empirical analysis is then performed on the southern periphery of Brussels (Brabant Wallon). The empirical analysis is divided into two parts: first, the effect of the size and shape of the windows on the fractal measures is empirically evaluated; this leads to a methodological discussion about the importance of the scale of analysis as well as the real sense of fractality. Second, we show empirically how far fractal dimension and density can look alike, but are also totally different. The relationship between density and fractality of built-up areas is discussed empirically and theoretically. Results are interpreted in an urban sprawl context as well as in a polycentric development of the peripheries. These analyses confirm the usefulness but also the limits of the fractal approach in order to describe the built-up morphology. Fractal analysis is a promising tool for describing the morphology of the city and for simulating its genesis and planning. Keywords: Fractals – dimension – periurbanisation – Brussels Note to the ERSA2004 referees: This is the state of our paper on April 30th 2004. It is not finished nor checked by an English native but results seem quite promising. Please take contact with the corresponding author for the latest version of the paper at the moment of the refereeing process or at the moment of editing the proceedings, if necessary. We thank you for your comments and questions.
Items vsad.zip
No full textThis folder contains the original items from the VSAD-Test, presented in:Lacroix, E., Cornet, S., Deggouj, N., Edwards, M. “Visuo-Spatial Abilities Diagnosis - Test (VSAD): Evaluate the potential cognitive difficulties of children with vestibular impairment through a new tablet-based computerised test battery”.(Currently in submission)Items are part of the VSAD-Test, using the Metrisquare DiagnosIS software (www.metrisquare.net). Access to the test is free of charge but requires author approval.Contact us for a request to use the VSAD: [email protected]; [email protected]</div
Snow avalanche speed determination using seismic methods
No full textWe present a new method to determine the average propagation speed of avalanches using seismic techniques. Avalanche propagation speeds can reach 70 m/s and more, depending on a wide range of factors, such as the characteristics of the avalanche track (e.g. topography) and the snowpack properties (e.g. density). Since the damage produced by the avalanche depends primarily on the size and on the speed of the avalanche, the knowledge of the latter is therefore crucial for estimating avalanche induced hazard in inhabited mountain areas. However, our knowledge of this basic physical parameter is limited by the difficulty of conducting various measurements in the harsh winter weather conditions that often accompany this natural phenomenon. The method of avalanche speed determination presented in this paper is based on cross-correlation and time-frequency analysis techniques. The data used in this study come from the Ryggfonn (Norway) avalanche experimental site operated by the Norwegian Geotechnical Institute (NGI), and recorded by an array of 6 geophones buried along the main avalanche path during the 2003-2004 and 2004-2005 winter seasons. Specifically, we examine the speeds of 11 different events, characterized by size and snow type. The results obtained are compared with independent speed estimates from CW-radar and pressure plate measurements. As a result of these comparisons our method was validated and has proved to be successful and robust in all cases. We detected a systematic behaviour in the speed evolution among different types of avalanches. Specifically, we found that whereas dry/mixed type flow events display a complex type of speed evolution in the study area with a gradual acceleration and an abrupt deceleration, the speed of the wet snow avalanches decreases with distance in an approximately linear fashion. This generalization holds for different size events. In terms of time duration and maximum speed of the studied events, dry/mixed type avalanches lasted between 8 to 18 s and reached speeds up to 50 m/s, whereas the duration of wet avalanches ranged between 50 and 80 s and their maximum speeds were 10 m/
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