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

"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