El entenao, de Alfredo Pareja Diezcanseco, y la afirmación de la cultura montuvia como componente integral de lo nacional (Del Fabulador)

El autor estudia el poema que Alfredo Pareja escribiera en 1935, El entenao, dentro del proyecto literario y social del Grupo de Guayaquil, ya que presenta los valores del montuvio y lo muestra como víctima de un sistema de justicia que ampara la usurpación y el abuso de los poderosos (el entenado es una figura de orígenes paternos inciertos, que simboliza el abandono y menosprecio con que se mira al montuvio). El proyecto del Grupo, a pesar del empeño y los esfuerzos investigativos -que incluyeron la mirada desde la arqueología-, quedó luego estancado en «lo folclórico», durante décadas. Por ello tiene sentido la publicación de la obra en 1988, cuando el país inició un nuevo proceso de definición de lo nacional- esta vez en torno a la interculturalidad-, la publicación coincide y contribuye con este segundo esfuerzo por integrar la cultura montuvia en el escenario nacional.

Del olvido a la memoria de la impunidad de la masacre de 1912 a través de La hoguera bárbara (Del historiador y el Ensayista)

La autora revisa la contribución de Alfredo Pareja a la memoria del país, a través de su libro La hoguera bárbara. Escrito en 1944, trae a la luz pública un tema eludido o marginado en años previos, reconstruyendo los escenarios que antecedieron a la masacre de Eloy Alfaro y otros liberales, asi mismo presenta claves para la comprensión de los eventos que estuvieron detrás de esos crímenes que marcaron la historia del país. El presente ensayo analiza tres momentos de la memoria social para indagar si fue posible olvidar estos hechos. Primero, revisa la percepción del pueblo y la versión oficial de la masacre de 1912, se recuerda que, en 1919, el fiscal en el juicio para identificar a autores, cómplices y encubridores, determinó en forma concluyente la responsabilidad del Estado en la misma, no obstante, los crímenes quedaron en la impunidad. El segundo momento es el de culto a Alfaro a través de la celebración de su obra pública, en los años 20 y 30, la memoria social sobre la masacre parece distendida. Finalmente, en los años 40, se publican obras sobre Alfaro, por el centenario de su nacimiento -entre ellas La hoguera bárbara-, presentándolo como héroe liberal y mártir del pueblo.

"Ella", de Juan Carlos Onetti. Necrofilia y ficción (Homenaje)

La autora reflexiona sobre el relato “Ella”, del uruguayo Juan Carlos Onetti, y sobre otras representaciones de la muerte de Eva Perón, escritas por Jorge Luis Borges, David Viñas y Néstor Perlongher. Afirma que en la Argentina de Perón ya confluían realidad y ficción, y que las múltiples biografías de Eva serían “un duelo de versiones narrativas entre la ficción y la historia o, si se prefiere, una metáfora de la historia”. Rosano plantea que, en los textos revisados, es la realidad la que adopta contornos fantasmagóricos, disparados por motivos diversos: la descomposición y el tópico del mal olor, la impostura del cuerpo embalsamado y del mandatario, el entrelazamiento entre lo político y lo sexual en la escena del velorio, la imagen de Eva, “una diosa que muestra sus encajes de novia de suburbio” pero también una siniestra y doliente “zombi escarlata”. Señala, finalmente, que los textos muestran a los fieles, esos “miles de necrófilos murmurantes y enlutados”, sometidos a la potencia del mito.

Los militares profanadores de la ciudad (Dossier: Literaturas de la integración, el Sur y su diversidad)

Reseña dos novelas publicadas en la década de 1980, que se ambientan en los años en que la dictadura uruguaya invade Minas, una pequeña ciudad de provincias. La balada de Johnny Sosa es la historia de la pérdida de la inocencia del negro Johnny, es también una “parábola sobre la dignidad humana, dando voz a quienes no la tienen, a los desheredados. A quienes, con militares o sin ellos siempre han estado en el fondo de la bolsa”. La misma ciudad de Minas es también el escenario de Las ventanas del silencio, novela en la que hablan diferentes voces, se narra cómo los soldados realizan allanamientos, encarcelan, torturan y matan, imponen el reparto de castigos y de favores. Aquí, en esta ciudad pequeña, en la que la frase “En Uruguay todos se conocen” resulta más evidente, el efecto de la dictadura y de las delaciones que ella propiciaba fue devastador. Ambas novelas narran, en definitiva, lo que ha ocurrido en este país “cuando los militares profanaron la ciudad”.

A general-method for tracking analysis and its application to meteorological data

Recent interest in the validation of general circulation models (GCMs) has been devoted to objective methods. A small number of authors have used the direct synoptic identification of phenomena together with a statistical analysis to perform the objective comparison between various datasets. This paper describes a general method for performing the synoptic identification of phenomena that can be used for an objective analysis of atmospheric, or oceanographic, datasets obtained from numerical models and remote sensing. Methods usually associated with image processing have been used to segment the scene and to identify suitable feature points to represent the phenomena of interest. This is performed for each time level. A technique from dynamic scene analysis is then used to link the feature points to form trajectories. The method is fully automatic and should be applicable to a wide range of geophysical fields. An example will be shown of results obtained from this method using data obtained from a run of the Universities Global Atmospheric Modelling Project GCM.

Advances in Model-Based Traffic Vision

Model based vision allows use of prior knowledge of the shape and appearance of specific objects to be used in the interpretation of a visual scene; it provides a powerful and natural way to enforce the view consistency constraint. A model based vision system has been developed within ESPRIT VIEWS: P2152 which is able to classify and track moving objects (cars and other vehicles) in complex, cluttered traffic scenes. The fundamental basis of the method has been previously reported. This paper presents recent developments which have extended the scope of the system to include (i) multiple cameras, (ii) variable camera geometry, and (iii) articulated objects. All three enhancements have easily been accommodated within the original model-based approach

Pose Refinement of Active Models using Forces in 3D

A new algorithm is described for refining the pose of a model of a rigid object, to conform more accurately to the image structure. Elemental 3D forces are considered to act on the model. These are derived from directional derivatives of the image local to the projected model features. The convergence properties of the algorithm is investigated and compared to a previous technique. Its use in a video sequence of a cluttered outdoor traffic scene is also illustrated and assessed.

A simple, intuitive camera calibration tool for natural images

The paper reports an interactive tool for calibrating a camera, suitable for use in outdoor scenes. The motivation for the tool was the need to obtain an approximate calibration for images taken with no explicit calibration data. Such images are frequently presented to research laboratories, especially in surveillance applications, with a request to demonstrate algorithms. The method decomposes the calibration parameters into intuitively simple components, and relies on the operator interactively adjusting the parameter settings to achieve a visually acceptable agreement between a rectilinear calibration model and his own perception of the scene. Using the tool, we have been able to calibrate images of unknown scenes, taken with unknown cameras, in a matter of minutes. The standard of calibration has proved to be sufficient for model-based pose recovery and tracking of vehicles.

Visual Object Recognition Using Deformable Models of Vehicles

This workshop paper reports recent developments to a vision system for traffic interpretation which relies extensively on the use of geometrical and scene context. Firstly, a new approach to pose refinement is reported, based on forces derived from prominent image derivatives found close to an initial hypothesis. Secondly, a parameterised vehicle model is reported, able to represent different vehicle classes. This general vehicle model has been fitted to sample data, and subjected to a Principal Component Analysis to create a deformable model of common car types having 6 parameters. We show that the new pose recovery technique is also able to operate on the PCA model, to allow the structure of an initial vehicle hypothesis to be adapted to fit the prevailing context. We report initial experiments with the model, which demonstrate significant improvements to pose recovery.

An Integrated Traffic and Pedestrian Model_based Vision System

The paper describes a novel integrated vision system in which two autonomous visual modules are combined to interpret a dynamic scene. The first module employs a 3D model-based scheme to track rigid objects such as vehicles. The second module uses a 2D deformable model to track non-rigid objects such as people. The principal contribution is a novel method for handling occlusion between objects within the context of this hybrid tracking system. The practical aim of the work is to derive a scene description that is sufficiently rich to be used in a range of surveillance tasks. The paper describes each of the modules in outline before detailing the method of integration and the handling of occlusion in particular. Experimental results are presented to illustrate the performance of the system in a dynamic outdoor scene involving cars and people.

Estimating surface CO2 fluxes from space-borne dry air mole fraction observations using an Ensemble Kalman filter

We have developed an ensemble Kalman Filter (EnKF) to estimate 8-day regional surface fluxes of CO2 from space-borne CO2 dry-air mole fraction observations (XCO2) and evaluate the approach using a series of synthetic experiments, in preparation for data from the NASA Orbiting Carbon Observatory (OCO). The 32-day duty cycle of OCO alternates every 16 days between nadir and glint measurements of backscattered solar radiation at short-wave infrared wavelengths. The EnKF uses an ensemble of states to represent the error covariances to estimate 8-day CO2 surface fluxes over 144 geographical regions. We use a 12×8-day lag window, recognising that XCO2 measurements include surface flux information from prior time windows. The observation operator that relates surface CO2 fluxes to atmospheric distributions of XCO2 includes: a) the GEOS-Chem transport model that relates surface fluxes to global 3-D distributions of CO2 concentrations, which are sampled at the time and location of OCO measurements that are cloud-free and have aerosol optical depths <0.3; and b) scene-dependent averaging kernels that relate the CO2 profiles to XCO2, accounting for differences between nadir and glint measurements, and the associated scene-dependent observation errors. We show that OCO XCO2 measurements significantly reduce the uncertainties of surface CO2 flux estimates. Glint measurements are generally better at constraining ocean CO2 flux estimates. Nadir XCO2 measurements over the terrestrial tropics are sparse throughout the year because of either clouds or smoke. Glint measurements provide the most effective constraint for estimating tropical terrestrial CO2 fluxes by accurately sampling fresh continental outflow over neighbouring oceans. We also present results from sensitivity experiments that investigate how flux estimates change with 1) bias and unbiased errors, 2) alternative duty cycles, 3) measurement density and correlations, 4) the spatial resolution of estimated flux estimates, and 5) reducing the length of the lag window and the size of the ensemble. At the revision stage of this manuscript, the OCO instrument failed to reach its orbit after it was launched on 24 February 2009. The EnKF formulation presented here is also applicable to GOSAT measurements of CO2 and CH4.

Cue combination for 3D location judgements

Cue combination rules have often been applied to the perception of surface shape but not to judgements of object location. Here, we used immersive virtual reality to explore the relationship between different cues to distance. Participants viewed a virtual scene and judged the change in distance of an object presented in two intervals, where the scene changed in size between intervals (by a factor of between 0.25 and 4). We measured thresholds for detecting a change in object distance when there were only 'physical' (stereo and motion parallax) or 'texture-based' cues (independent of the scale of the scene) and used these to predict biases in a distance matching task. Under a range of conditions, in which the viewing distance and position of the tarte relative to other objects was varied, the ration of 'physical' to 'texture-based' thresholds was a good predictor of biases in the distance matching task. The cue combination approach, which successfully accounts for our data, relies on quite different principles from those underlying geometric reconstruction.

View-based approaches to spatial representation in human vision

In an immersive virtual environment, observers fail to notice the expansion of a room around them and consequently make gross errors when comparing the size of objects. This result is difficult to explain if the visual system continuously generates a 3-D model of the scene based on known baseline information from interocular separation or proprioception as the observer walks. An alternative is that observers use view-based methods to guide their actions and to represent the spatial layout of the scene. In this case, they may have an expectation of the images they will receive but be insensitive to the rate at which images arrive as they walk. We describe the way in which the eye movement strategy of animals simplifies motion processing if their goal is to move towards a desired image and discuss dorsal and ventral stream processing of moving images in that context. Although many questions about view-based approaches to scene representation remain unanswered, the solutions are likely to be highly relevant to understanding biological 3-D vision.

Scales and voices in World Historical Archaeology

This paper briefly sets the scene for the articles that follow, introducing some key debates that have characterized the recent practice of historical archaeology. The definition of historical archaeology is explored according to parameters of chronology and methodology, drawing a distinction between New World traditions that define the subject as 'post-Columbian' and Old World approaches that establish broader connections with the 'documentary archaeology' of all literate societies. Current issues in European and American historical archaeology are highlighted, including the gradual breakdown of the medieval/post-medieval divide and the call for a global 'modern-world archaeology' to address the 'grand historical narratives' of the period, such as capitalism, economic improvement, and consumerism. The resistance to this global research agenda is explored with reference to archaeologies of diaspora and postcolonialism, which demand local perspectives to explore diversity and meaning. Finally, the innovative use of community archaeology and multi-vocality is introduced, with particular reference to the experimental narratives pursued by American historical archaeologists, in their new role as 'storytellers'.

Introduction: scales and voices in world historical archaeology

This paper briefly sets the scene for the articles that follow, introducing some key debates that have characterized the recent practice of historical archaeology. The definition of historical archaeology is explored according to parameters of chronology and methodology, drawing a distinction between New World traditions that define the subject as 'post-Columbian' and Old World approaches that establish broader connections with the 'documentary archaeology' of all literate societies. Current issues in European and American historical archaeology are highlighted, including the gradual breakdown of the medieval/post-medieval divide and the call for a global 'modern-world archaeology' to address the 'grand historical narratives' of the period, such as capitalism, economic improvement, and consumerism. The resistance to this global research agenda is explored with reference to archaeologies of diaspora and postcolonialism, which demand local perspectives to explore diversity and meaning. Finally, the innovative use of community archaeology and multi-vocality is introduced, with particular reference to the experimental narratives pursued by American historical archaeologists, in their new role as 'storytellers'.