Recensiones [Revista de Historia Económica Año XI Invierno 1993 n. 1 pp. 209-243]

Editada en la Universidad Carlos IIILutgardo García Fuentes. Sevilla, los vascos y América. (Las exportaciones de hierro, manufacturas metálicas en los siglos XVI, XVII y XVIII) (Por Rafael Uñarte Ayo).-- Enrique Tandeter. Coacción y mercado. La minería de la plata en el Potosí Colonial 1692-1826 (Por Zacarías Moutoukias).-- Manuel Miño Grijalva. Obrajes y tejedores en Hueva España (1700-1810) (Por Pedro Pérez Herrero).-- Luis Perdices Blas.Pablo de Olavide (1725-1803), el Ilustrado (Por Victoriano Martin Martín).-- Daniel Peribáñez Caveda. Comunicaciones y comercio marítimo en la Asturias preindustrial (1750-1850) (Por José Ramón García López).-- Vicent Llombart.Campomanes, economista y político de Carlos III (Por Luis Perdices Blas).-- M. Teresa Pérez Picazo.El mayorazgo en la historia económica de la región murciana, expansión, crisis y abolición (siglos XVIII-XIX) (Por Juan Antonio Carmona Pidal).-- Nelson Lourenço. Familia rural e industria. Mudanga social na regido de Leiria (Por Carmen Sarasúa García).-- Blanca Sánchez Alonso.La inmigración española en Argentina, siglos XIX y XX (Por José Moya).-- Gianni Toniolo.An Economic History qf Liberal Italy, 1859-1918 (Por Francesco L. Galassi).-- Albert Carreras. Estadísticas históricas de España. Siglos XIX-XX (Por Sebastian Coll Martín)Publicad

Disminución de la emisión de contaminantes por la adición de O2 al aire de aspiración, en un motor ciclo Otto

La emisión de contaminantes y la formación del smog fotoquímico, son de gran interés para la ciudad de Santiago de Chile, debido a su particular configuración geográfica. El presente trabajo comprobó que la adición de oxígeno al aire de aspiración de un motor de combustión interna, produce una disminución, respecto al valor normal de 80% en las emisiones de monóxido de carbono (CO) y de 45% en los de hidrocarburos (HC), y un aumento de 40% en la emisión de dióxido de nitrógeno (NO2). La disminución del (CO) é (HC), contribuye a minimizar la formación de smog fotoquímico; en cambio, el aumento en los NO2 incide significativamente en dicha formación, por ser el (HC) el reactivo limitante

Generación semi-automática de mosaicos. Aplicación de técnicas de fusión de imágenes

Se presenta un sistema semi automático de generación de mosaicos que reduce la intervención humana a un llÚnimo. El procedimiento esta constituido por los pasos de corrección geométrica, corrección radiométrica, determinación del contenido óptimo en la zona de solape mediante técnicas de fusión de imágenes y generación de la imagen compuesta. Se presentan resultados de su aplicación sobre imágenes utilizadas en aplicaciones reales de teledetección

Instabilities developed in stratified flows over pronounced obstacles

In the present work we study numerical and experimentally the flow of a two-layer stratified fluid over a topographic obstacle. The problem reflects a wide number of oceanographic and meteorological situations, where the stratification plays an important role. We identify the different instabilities developed by studying the pycnocline deformation due to a pronounced obstacle. The numerical simulations were made using the model caffa3D.MB which works with a numerical model of Navier-Stokes equations with finite volume elements in curvilinear meshes. The experimental results are contrasted with numerical simulations. Linear stability analysis predictions are checked with particle image velocimetry (PIV) measurements.</p

Two-layer stratified flows over pronounced obstacles at low-to-intermediate Froude numbers

Two-layer stratified flows over abrupt topographic obstacles, simulating relevant situations in oceanographic problems, are investigated numerically and experimentally in a simplified two-dimensional situation. Experimental results and numerical simulations are presented at low-to-intermediate Froude numbers for two different obstacles: one semicylindrical and the other prismatic. In both cases, four different flow regimes downstream of the obstacles are found: (I) subcritical flow, (II) internal hydraulic jump, (III) Kelvin-Helmholtz instability at the interface, and (IV) shedding of billows. The critical values of the Froude number for the transition between different regimes depend strongly on the shape of the obstacle. In regime (III), we show that the characteristics of the lee wave that appears past the obstacle can be explained with a theoretical stability analysis. Almost independence of the vortex shedding frequency with upstream velocity is observed and explained.</p

Interweaving and enriching digital music collections for scholarship, performance, and enjoyment

Comunicació presentada a: 6th International Conference on Digital Libraries for Musicology (DLfM) celebrat el 9 de novembre de 2019 a La Haia, Països Baixos.The turn toward the digital has opened up previously difficult to access musical materials to wider musicological scholarship. Digital repositories provide access to publicly licensed score images, score encodings, textual resources, audiovisual recordings, and music metadata. While each repository reveals rich information for scholarly investigation, the unified exploration and analysis of separate digital collections remains a challenge. TROMPA—Towards Richer Online Music Public-domain Archives—addresses this through a knowledge graph interweaving composers, performers, and works described in established digital music libraries, facilitating discovery and combined access of complementary materials across collections. TROMPA provides for contribution of expert insights as citable, provenanced annotations, supporting analytical workflows and scholarly communication. Beyond scholars, the project targets four further user types: instrumental players; choir singers; orchestras; and music enthusiasts; with corresponding web applications providing specialised views of the same underlying knowledge graph. Thus, scholars’ annotations provide contextual information to other types of users; while performers’ rehearsal recordings and performative annotations, conductors’ marked up scores, and enthusiasts’ social discussions and listening behaviours, become available to scholarly analysis (per user consent). The knowledge graph is exposed as Linked Data, adhering to the FAIR principles of making data Findable, Accessible, Interoperable, and Re-usable, and supporting further interlinking, re-interpretation and re-use beyond the immediate scope of the project.This project has received funding from the European Union’s Horizon 2020 research and innovation programme H2020-EU.3.6.3.1. - Study European heritage, memory, identity, integration and cultural interaction and translation, including its representations in cultural and scientific collections, archives and museums, to better inform and understand the present by richer interpretations of the past under grant agreement No. 770376

Interweaving and enriching digital music collections for scholarship, performance, and enjoyment

Comunicació presentada a: 6th International Conference on Digital Libraries for Musicology (DLfM) celebrat el 9 de novembre de 2019 a La Haia, Països Baixos.The turn toward the digital has opened up previously difficult to access musical materials to wider musicological scholarship. Digital repositories provide access to publicly licensed score images, score encodings, textual resources, audiovisual recordings, and music metadata. While each repository reveals rich information for scholarly investigation, the unified exploration and analysis of separate digital collections remains a challenge. TROMPA—Towards Richer Online Music Public-domain Archives—addresses this through a knowledge graph interweaving composers, performers, and works described in established digital music libraries, facilitating discovery and combined access of complementary materials across collections. TROMPA provides for contribution of expert insights as citable, provenanced annotations, supporting analytical workflows and scholarly communication. Beyond scholars, the project targets four further user types: instrumental players; choir singers; orchestras; and music enthusiasts; with corresponding web applications providing specialised views of the same underlying knowledge graph. Thus, scholars’ annotations provide contextual information to other types of users; while performers’ rehearsal recordings and performative annotations, conductors’ marked up scores, and enthusiasts’ social discussions and listening behaviours, become available to scholarly analysis (per user consent). The knowledge graph is exposed as Linked Data, adhering to the FAIR principles of making data Findable, Accessible, Interoperable, and Re-usable, and supporting further interlinking, re-interpretation and re-use beyond the immediate scope of the project.This project has received funding from the European Union’s Horizon 2020 research and innovation programme H2020-EU.3.6.3.1. - Study European heritage, memory, identity, integration and cultural interaction and translation, including its representations in cultural and scientific collections, archives and museums, to better inform and understand the present by richer interpretations of the past under grant agreement No. 770376