La condición "postcolonial": Identidades dinámicas entre la diferencia y el sincretismo

Reseña de: Mezzadra, Sandro (coord.; VV.AA.) (2008), Estudios postcoloniales. Ensayos fundamentales, Editorial Traficantes de Sueños, colección Mapas, Madri

Tree aboveground biomass and species richness of the mature tropical forests of Darien, Panama, and their role in global climate change mitigation and biodiversity conservation

AbstractThe remote forests of the Darien region in eastern Panama are among the last remnants of relatively undisturbed forest habitat in the Central American isthmus. Despite decades of efforts by the government, nongovernmental organizations, and civil society, including Indigenous peoples, to protect the region's natural heritage, it remains under significant threat due to widespread illegal logging. Now, the Panamanian government is considering the mechanism, Reducing Emissions from Deforestation and Forest Degradation (REDD+), as another option to limit forest loss. Central to the proper functioning of REDD+ is the need to reduce uncertainties in estimates of aboveground biomass (AGB). These estimates are used to establish realistic reference levels against which additional contributions to reducing carbon dioxide emissions from the loss and degradation of forests can be financially compensated. Also, highly desirable to REDD+ is the achievement of biodiversity cobenefits. REDD+ investments will likely be directed primarily to areas where the potential to simultaneously mitigate climate change and conserve biodiversity is highest. Here, we present the results of a field‐based forest carbon inventorying method tested in Darien's mature forests with the participation of Embera and Wounaan Indigenous peoples. We also explore whether variations in field‐based estimates of AGB across mature forests, in both undisturbed and disturbed areas, are detectable through free and readily‐available remote sensing data sources. Furthermore, we examine and compare AGB and tree species richness in Darien with other well‐studied forest sites across the tropics. Our findings reveal that Darien's forests play a crucial role globally and regionally in storing carbon and housing biodiversity, and support the imperative need to protect these forests in a culturally appropriate manner with the region's Indigenous peoples

Medida de la temperatura interna de una cámara de combustión

Ce travail a pour but d’étalonner un instrument optique. Ce dispositif est un radiomètre qui va être utilisé pour mesurer la température interne d’un foyer de combustion. Il sert à caractériser la température selon les valeurs de tension qui fourni. Par conséquent le but de ce rapport est présenter les courbes de calibration du radiomètre obtenues à partir des mesures sur un corps noir et de vérifier ces résultats. Le travail réalisé sur le projet à été complété par une recherche et le choix de fournisseurs de fluxmètres thermiques et de peinture présentant une haute émissivité pour compléter les actions actuellement menées sur le même foyer de combustion. _______________________________________________________________________________This work studies the calibration of an optical instrument. The instrument is a radiometer which is going to be used to measure the temperature on the inner wall of a combustion chamber. It is used to measure the temperature according to the voltage values recorded. Therefore the aim of this report is to design the radiometer calibration curves from measurements on a black body. The project is completed with the research and selection of flowmeters and high emissivity paint providers to help other projects on the same combustion chamber. ____________________________________________________________________________________Este trabajo tiene por objetivo calibrar un instrumento óptico. Este dispositivo es un radiómetro que va a ser utilizado para medir la temperatura interna de una cámara de combustión. Sirve para caracterizar la temperatura según los valores de tensión que nos proporciona. Por consiguiente el objetivo de esta memoria es presentar las curvas de calibración del radiómetro obtenidas a partir de medidas en un cuerpo negro y también de verificar que los resultados son fiables. El trabajo realizado en este proyecto ha sido completado por una búsqueda y elección de proveedores de flujómetros térmicos y de pintura de alta emisividad para completar otros proyectos llevados a cabo en la misma cámara de combustión.Ingeniería Industria

Mourning heritage and museum: memory, education, morbidity and consumption. Notes for a possible musealization of the Valle de los Caídos.

El anuncio del gobierno de España de su decisión de exhumar los restos del dictador Francisco Franco de la Basílica de la Santa Cruz del Valle de los Caídos para poner fin a una situación anómala en un sistema democrático ha supuesto la reactivación del debate en torno a la conservación de este conjunto monumental. Abandono, demolición y resignificación son algunas de las acciones que se han propuesto. Sin embargo, este texto aboga por una concisa musealización del monumento funerario. Para ello, se argumenta el papel que los museos juegan en la superación del dolor a nivel individual y social y su papel en la conformación y resguardo del sistema democrático y se analizan algunos casos de fama mundial tanto desde la óptica del museo como del espacio urbano.The announcement of the government of Spain of its decision to exhume the mortal remains of the dictator Francisco Franco from the Basilica of the Holy Cross of the Valle de los Caídos in order to put an end to an anomalous situation in a democratic system has meant the reactivation of the debate around the conservation of this monumental complex. Abandonment, demolition and resignification are some of the actions that have been proposed. However, this text advocates for a concise musealization of the funerary monument. With this aim, the role that museums play in overcoming pain at the individual and social levels and their role in shaping and safeguarding the democratic system is argued, and some world-renowned cases are analyzed both from the perspective of the museum and the urban space

Mapping Differential Reddening in the Inner Galactic Globular Cluster System

A serious limitation in the study of many globular clusters—especially those located near the Galactic center—has been the existence of large and differential extinction by foreground dust. In a series of papers, we intend to map the differential extinction and remove its effects, using a new dereddening technique, in a sample of clusters in the direction of the inner Galaxy, observed using the Magellan 6.5 m telescope and the Hubble Space Telescope. These observations and their analysis will let us produce high-quality color-magnitude diagrams of these poorly studied clusters that will allow us to determine these clusters' relative ages, distances, and chemistry and to address important questions about the formation and the evolution of the inner Galaxy. We also intend to use the maps of the differential extinction to sample and characterize the interstellar medium along the numerous low-latitude lines of sight where the clusters in our sample lie. In this first paper, we describe in detail our dereddening method along with the powerful statistics tools that allow us to apply it, and we show the kind of results that we can expect, applying the method to M62, one of the clusters in our sample. The width of the main sequence and lower red giant branch narrows by a factor of two after applying our dereddening technique, which will significantly help to constrain the age, distance, and metallicity of the cluster

Hierarchical clustered register file organization for VLIW processors

Technology projections indicate that wire delays will become one of the biggest constraints in future microprocessor designs. To avoid long wire delays and therefore long cycle times, processor cores must be partitioned into components so that most of the communication is done locally. In this paper, we propose a novel register file organization for VLIW cores that combines clustering with a hierarchical register file organization. Functional units are organized in clusters, each one with a local first level register file. The local register files are connected to a global second level register file, which provides access to memory. All intercluster communications are done through the second level register file. This paper also proposes MIRS-HC, a novel modulo scheduling technique that simultaneously performs instruction scheduling, cluster selection, inserts communication operations, performs register allocation and spill insertion for the proposed organization. The results show that although more cycles are required to execute applications, the execution time is reduced due to a shorter cycle time. In addition, the combination of clustering and hierarchy provides a larger design exploration space that trades-off performance and technology requirements.Peer ReviewedPostprint (published version

Modulo scheduling with integrated register spilling for clustered VLIW architectures

Clustering is a technique to decentralize the design of future wide issue VLIW cores and enable them to meet the technology constraints in terms of cycle time, area and power dissipation. In a clustered design, registers and functional units are grouped in clusters so that new instructions are needed to move data between them. New aggressive instruction scheduling techniques are required to minimize the negative effect of resource clustering and delays in moving data around. In this paper we present a novel software pipelining technique that performs instruction scheduling with reduced register requirements, register allocation, register spilling and inter-cluster communication in a single step. The algorithm uses limited backtracking to reconsider previously taken decisions. This backtracking provides the algorithm with additional possibilities for obtaining high throughput schedules with low spill code requirements for clustered architectures. We show that the proposed approach outperforms previously proposed techniques and that it is very scalable independently of the number of clusters, the number of communication buses and communication latency. The paper also includes an exploration of some parameters in the design of future clustered VLIW cores.Peer ReviewedPostprint (published version

Effect of Vinyl Flooring on the Modal Properties of a Steel Footbridge

Damping ratios associated with non structural elements play an important role in mitigating the pedestrian-induced vibrations of slender footbridges. In particular, this paper analyses the effect of vinyl flooring on the modal parameters of steel footbridges. Motivated by the unexpected high experimental damping ratios of the first vibration modes of a real footbridge, whose deck was covered by a vinyl flooring, this paper aims at assessing more accurately the experimental damping ratios generated by this non-structural element on steel footbridges. For this purpose, a laboratory footbridge was built and vinyl flooring was installed on it. Its numerical and experimental modal parameters without and with the vinyl flooring were determined. The operational modal analysis method was used to estimate experimentally the modal parameters of the structure. The damping ratios associated with the vinyl flooring were obtained via the substraction between the experimental damping ratios of the laboratory footbridge with and without the vinyl flooring. An average increase of the damping ratios of 2.069% was observed due to the vinyl flooring installed. According to this result, this type of pavement may be a useful tool to significantly increase the damping ratios of steel footbridges in order to reduce pedestrian-induced vibrationsMinisterio de Economía y Competitividad DPI2014-53947-RFondo Europeo de Desarrollo Regional DPI2014-53947-