Calculating the inherent visual structure of a landscape (inherent viewshed) using high-throughput computing

This paper describes a method of calculating the inherent visibility at all locations in a landscape (‘total viewshed’) by making use of redundant computer cycles. This approach uses a simplified viewshed program that is suitable for use within a distributed environment, in this case managed by the Condor system. Distributing the calculation in this way reduced the calculation time of our example from an estimated 34 days to slightly over 25 hours using a cluster of 43 workstations. Finally, we discuss the example ‘total viewshed’ raster for the Avebury region, and briefly highlight some of its implications

Johannesburgo: Núcleos intransigentes de significado: Un examen de la nomosfera a través de "Collective Amnesia" de Koleka Putuma

This research paper delves into the intersection of critical thinking, comparative literature, and urban theory by examining Emily Apter's theory of the untranslatable in the context of South African poet Koleka Putuma's poetry book, Collective Amnesia. Apter's concept of the untranslatable serves as a theoretical framework to analyze Putuma's utilization of untranslatable elements within her poetry as a means of resistance against colonial discourse. Specifically, the paper argues that Putuma strategically employs untranslatables to challenge and disrupt the colonial reader's expectations and interpretations, thereby asserting agency and autonomy within the literary space. Furthermore, this paper explores how the untranslatables utilized by Putuma offer insights into the intricacies of Johannesburg as a contested urban space. Drawing from contemporary urban theory, particularly David Delaney's conception of the nomosphere, the paper analyzes how Putuma's incorporation of untranslatable elements within her poetry provides a nuanced understanding of Johannesburg's complex social, cultural, and historical dynamics. Through close textual analysis, the paper uncovers the ways in which untranslatables function as symbolic markers that reveal the nomospheric layers of the city, shedding light on its spatial politics, power dynamics, and socio-cultural tensions.Este artículo de investigación profundiza en la intersección entre el pensamiento crítico, la literatura comparada y la teoría urbana a través del análisis de la teoría del intraducible de Emily Apter en el contexto del libro de poesía de la poetisa sudafricana Koleka Putuma, "Amnesia Colectiva". El concepto de intraducible de Apter sirve como marco teórico para examinar la utilización estratégica de elementos intraducibles por parte de Putuma en su poesía como medio de resistencia frente al discurso colonial. Concretamente, el artículo argumenta que Putuma emplea los intraducibles para desafiar y trastornar las expectativas e interpretaciones del lector colonial, reafirmando así su agencia y autonomía dentro del ámbito literario. Asimismo, este trabajo explora cómo los intraducibles utilizados por Putuma ofrecen una perspectiva sobre las complejidades de Johannesburgo como espacio urbano en disputa. A través del prisma de la teoría urbana contemporánea, especialmente la concepción de la nomosfera propuesta por David Delaney, el artículo analiza cómo la inclusión de elementos intraducibles por parte de Putuma en su poesía proporciona una comprensión matizada de las dinámicas sociales, culturales e históricas complejas de Johannesburgo. Mediante un análisis textual minucioso, el artículo revela cómo los intraducibles funcionan como marcadores simbólicos que desvelan las capas nomosféricas de la ciudad, arrojando luz sobre sus políticas espaciales, dinámicas de poder y tensiones socioculturales

"Self pop-out”: agency enhances self-recognition in visual search

In real-life situations, we are often required to recognize our own movements among movements originating from other people. In social situations, these movements are often correlated (for example, when dancing or walking with others) adding considerable difficulty to self-recognition. Studies from visual search have shown that visual attention can selectively highlight specific features to make them more salient. Here, we used a novel visual search task employing virtual reality and motion tracking to test whether visual attention can use efferent information to enhance self-recognition of one's movements among four or six moving avatars. Active movements compared to passive movements allowed faster recognition of the avatar moving like the subject. Critically, search slopes were flat for the active condition but increased for passive movements, suggesting efficient search for active movements. In a second experiment, we tested the effects of using the participants' own movements temporally delayed as distractors in a self-recognition discrimination task. We replicated the results of the first experiment with more rapid self-recognition during active trials. Importantly, temporally delayed distractors increased reaction times despite being more perceptually different than the spatial distractors. The findings demonstrate the importance of agency in self-recognition and self-other discrimination from movement in social setting

Proteomic analysis of lipoprotein lipase charge isoforms

Comunicaciones a Congreso

La lipoproteína lipasa de rata se nitra in vivo en respuesta a la administración de lipopolisacárido

Comunicaciones a congreso

Microelectromechanical resonators based on an all polymer/carbon nanotube composite structural material

Carboxylated multi-wall carbon-nanotubes (CNTs) monolayers are integrated on microfabricated all-polymer micro-electromechanical systems (pMEMS) resonator bridges on glass substrates. The structural layer of the MEMS bridges is a multilayer blended conductive polymer based on poly(3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS) to which functionalized CNT monolayers are electrostatically attached. The resonance frequency (fres) of electrostatically actuated pMEMS bridges was measured as a function of their length (32–67 lm) for different multilayer compositions. A significant increase in fres and quality factor (Q) with the addition of CNT monolayers to the PEDOT:PSS structural material is observed, demonstrating that CNT monolayers can be used to modulate pMEMS resonator properties.Peer ReviewedPostprint (published version

Integrated Optical Interferometric Biosensors based on Microelectronics technology for biosensing applications

6 páginas, 8 figuras.-- Comunicación oral presentada al Ibersensors´2002 celebrado en Lima (Perú) en 2002.Integrated optical sensors have reached a great importance during last years since they can be used for the direct detection of biomolecular interactions. Moreover, Silicon microelectronics technology allows mass production as well as the fabrication of microsystems by hybrid integration of sources, sensors, photodelectors and CMOS electronics. For the fabrication of an evanescent field sensor with an integrated Mach-Zehnder interferometric (MZI) configuration, the optical waveguides must verify two main characteristics: monomode behaviour and high surface sensitivity. In this paper we present the development of a MZI sensor based on two different optical waveguides: TIR (Total Internal Reflection) and ARROW (Antiresonant Reflecting Optical Waveguides). The advantages of both structures are discussed and experimental results of the devices are presented.Peer reviewe