The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
G. Lorimer Moseley - One of the best experts on this subject based on the ideXlab platform.
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Untangling visual and proprioceptive contributions to hand Localisation over time
Experimental Brain Research, 2015Co-Authors: Valeria Bellan, Helen R. Gilpin, Tasha R. Stanton, Roger Newport, Alberto Gallace, G. Lorimer MoseleyAbstract:Previous studies showed that self-Localisation ability involves both vision and proprioception, integrated into a single percept, with the tendency to rely more heavily on visual than proprioceptive cues. Despite the increasing evidence for the importance of vision in localising the hands, the time course of the interaction between vision and proprioception during visual occlusion remains unclear. In particular, we investigated how the brain weighs visual and proprioceptive information in hand Localisation over time when the visual cues do not reflect the real position of the hand. We tested three hypotheses: Self-Localisations are less accurate when vision and proprioception are incongruent; under the same conditions of incongruence, people first rely on vision and gradually revert to proprioception; if vision is removed immediately prior to hand Localisation, accuracy increases. Sixteen participants viewed a video of their hands, under three conditions each undertaken with eyes open or closed: Incongruent conditions (right hand movement seen: inward, right hand real movement: outward), Congruent conditions (movement seen congruent to real movement). The right hand was then hidden from view and participants performed a Localisation task whereby a moving vertical arrow was stopped when aligned with the felt position of their middle finger. A second experiment used identical methodology, but with the direction of the arrow switched. Our data showed that, in the Incongruent conditions (both with eyes open and closed), participants perceived their right hand close to its last seen position. Over time, the perceived position of the hand shifted towards the physical position. Closing the eyes before the Localisation task increased the accuracy in the Incongruent condition. Crucially, Experiment 2 confirmed the findings and showed that the direction of arrow movement had no effect on hand Localisation. Our hypotheses were supported: When vision and proprioception were incongruent, participants were less accurate and initially relied on vision and then proprioception over time. When vision was removed, this shift occurred more quickly. Our findings are relevant in understanding the normal and pathological processes underpinning self-Localisation.
A Harvey Millar - One of the best experts on this subject based on the ideXlab platform.
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SUBA: the Arabidopsis Subcellular Database.
Nucleic acids research, 2006Co-Authors: Joshua L Heazlewood, Robert E Verboom, Julian Tonti-filippini, Ian Small, A Harvey MillarAbstract:Knowledge of protein Localisation contributes towards our understanding of protein function and of biological inter-relationships. A variety of experimental methods are currently being used to produce Localisation data that need to be made accessible in an integrated manner. Chimeric fluorescent fusion proteins have been used to define subcellular Localisations with at least 1100 related experiments completed in Arabidopsis. More recently, many studies have employed mass spectrometry to undertake proteomic surveys of subcellular components in Arabidopsis yielding Localisation information for approximately 2600 proteins. Further protein Localisation information may be obtained from other literature references to analysis of locations (AmiGO: approximately 900 proteins), location information from Swiss-Prot annotations (approximately 2000 proteins); and location inferred from gene descriptions (approximately 2700 proteins). Additionally, an increasing volume of available software provides location prediction information for proteins based on amino acid sequence. We have undertaken to bring these various data sources together to build SUBA, a SUBcellular location database for Arabidopsis proteins. The Localisation data in SUBA encompasses 10 distinct subcellular locations, >6743 non-redundant proteins and represents the proteins encoded in the transcripts responsible for 51% of Arabidopsis expressed sequence tags. The SUBA database provides a powerful means by which to assess protein subcellular Localisation in Arabidopsis (http://www.suba.bcs.uwa.edu.au).
Adbelhamid Miri - One of the best experts on this subject based on the ideXlab platform.
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Tuberculosis of the talus in the child
European Journal of Orthopaedic Surgery & Traumatology, 2003Co-Authors: Youssef Teklali, Zouheir Fellous El Alami, Tarik El Madhi, Hassan Gourinda, Adbelhamid MiriAbstract:Objective Authors report an exceptional localization of tuberculosis in children. Background Tuberculosis became a pathology of high incidence in the last 20 years, even in industrialized countries. Localization in the talus is rarely reported (less than 100 pediatric cases worldwide). The authors report on observation of isolated bone tuberculosis of talus in a 20-month old boy. Isolated infection of the talus by Koch's bacillus (KB) is extremely rare; only a few rare cases in the child and at the adult have been reported in the literature. In our observation, a delay of 6 week was necessary to make diagnosis of bone tuberculosis. Reasons for this delay, and some diagnostic and therapeutic aspects of this disease, are discussed here. Conclusion Tuberculosis of the talus must be considered before any other inflammatory ankle disease. But du travail Les auteurs attirent l'attention sur une Localisation exceptionnelle de la tuberculose chez l'enfant. Introduction La tuberculose a connu une nette recrudescence de son incidence au cours des 20 dernières années même dans les pays développés. Cette maladie peut intéresser plusieurs Localisations, certaines telle l'astragale, sont très rarement rapportées. Les auteurs rapportent une observation d'ostéite tuberculeuse astragalienne chez un nourrisson de 20 mois. Commentaires L'atteinte isolée de l'astragale par le bacille de Koch (BK), est une entité extrêmement rare, seuls quelques rares cas ont été rapportés dans la littérature chez l'enfant et chez l'adulte. Dans notre observation, un délai de 6 semaines a été nécessaire pour poser le diagnostic d'ostéite tuberculeuse, les raisons de ce retard, ainsi que différents aspects diagnostiques et thérapeutiques de cette affection sont discutés à travers cette observation.
Laurent G.j. Montesi - One of the best experts on this subject based on the ideXlab platform.
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Strain weakening enables continental plate tectonics
Tectonophysics, 2014Co-Authors: Frédéric Gueydan, Jacques Précigout, Laurent G.j. MontesiAbstract:Much debate exists concerning the strength distribution of the continental lithosphere, how it controls lithosphere-scale strain localization and hence enables plate tectonics. No rheological model proposed to date is comprehensive enough to describe both the weakness of plate boundary and rigid-like behaviour of plate interiors. Here we show that the duality of strength of the lithosphere corresponds to different stages of microstructural evolution. Geological constraints on lithospheric strength and large strain numerical experiments reveal that the development of layers containing weak minerals and the onset of grain boundary sliding upon grain size reduction in olivine cause strain Localisation and reduce strength in the crust and subcontinental mantle, respectively. The positive feedback between weakening and strain localization leads to the progressive development of weak plate boundaries while plate interiors remain
Schymura Christopher - One of the best experts on this subject based on the ideXlab platform.
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Cognitive models for acoustic and audiovisual sound source localization
2020Co-Authors: Schymura ChristopherAbstract:Viele alltägliche Anwendungen wie Sprachassistenten und Telefonkonferenzsysteme sind auf eine effiziente Lokalisation von Schallquellen angewiesen. In dieser Arbeit werden drei neuartige Ansätze zur Schallquellenlokalisation vorgestellt. Der erste Ansatz ist im Bereich der audiovisuellen Lokalisation von Schallquellen angesiedelt. Durch zusätzliche visuelle Informationen ist es möglich, die Ortung von Schallquellen speziell in akustisch stark gestörten Umgebungen zu verbessern. Ausgehend von der Erkenntnis, dass menschliche Hörer Kopfbewegungen nutzen um die Ortung von Schallquellen zu verbessern, wird im zweiten Teil dieser Arbeit ein System vorgestellt, das dieses Verhalten als Regelkreises für Anwendungen in der Robotik nachbildet. Im letzten Teil wird dann ein Verfahren zur Bestimmung der Einfallsrichtung des Direktschalls in Umgebungen mit Nachhall eingeführt. Hierdurch wird die nachfolgende Schallquellenlokalisation insbesondere in Umgebungen mit starkem Nachhall optimiert.Many common applications like intelligent personal assistants and teleconferencing systems require an accurate localization of sound sources in their environment. In this thesis, three novel approaches to sound source localization will be presented. The first approach is proposed in the context of audiovisual localization of sound sources. Hereby, estimating the position of sound sources can be improved by incorporating additional visual information. Subsequently, the second part of this thesis introduces a closed-loop feedback control system for robotics applications. This system is based on psychoacoustic evidence that human listeners utilize head movements to refine the localization of sound sources. The last part of this work proposes an algorithm for determining the direct sound direction-of-arrival in reverberant environments. This yields an improved sound source localization performance in challenging acoustic environments with large reverberation time
