2,005 research outputs found

    Delayed action does not always require the ventral stream : A study on a patient with visual form agnosia

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    Acknowledgements The authors would like to thank D.F. for participating in all our experiments with great patience. We also would like to thank Dr David Carey for his very helpful and insightful comments on an earlier draft of this manuscript. This work was partly funded by a post-doctoral research fellowship awarded to Constanze Hesse by the German Research Council (DFG/HE 6011/1-1).Peer reviewedPostprin

    Archaeological dating of colluvial and lacustrine deposits in a GIS environment investigating the multi-period site Gortz 1 on Oberer Beetzsee, Brandenburg

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    From the mid-14th century CE onwards, extensive soil erosion, caused by intensive agricultural practices, has led to the destruction of landscape structures in Central Europe. In 2016, the University of Applied Sciences in Berlin investigated the colluvial deposits at the site of Gortz in western Brandenburg (Germany), which had accumulated on the lower slopes and were caused by the processes just mentioned. The mapping of each individual archaeological find made it possible to project all finds onto one profile running along the slope. Transformation of the finds' coordinates from profile view to plan view enabled the visualization in a Geographical Information System (GIS). The combination of adjacent strata into larger units using a pedological and sedimentological approach enabled an improved dating of colluvial deposits. In addition, the method facilitated the dating of historical water levels in the Beetzsee chain of lakes, which are part of the Havel river system. As a result, it could be demonstrated that substantial anthropogenic activity, such as clay quarrying and bank straightening, took place during the Late Slavic Period. An interlocking horizon of colluvial and lacustrine deposits indicates that the water level of the lake Oberer Beetzsee rose from a value under 29.4 m above sea level (a.s.l.) in the 11th/12th century CE to approximately 29.8 m a.s.l. in the 13th century CE. However, isolated flooding events during the 13th century CE can be recorded up to a height of 30.5 m a.s.l. A modern colluvial deposit of 1 m in thickness indicates an acute endangerment of the archaeological site by modern agriculture.Flächenhafte Bodenerosion, ausgelöst durch intensive landwirtschaftliche Nutzung, führte ab Mitte des 14. Jahrhunderts u.Z. zur Zerstörung von Landschaftsstrukturen und in Mitteleuropa. Kolluvien, welche durch diese Prozesse entstanden und am Unterhang akkumulierten, wurden auf dem Fundplatz Gortz (westliches Brandenburg, Deutschland) durch die Hochschule für Technik und Wirtschaft Berlin im Jahr 2016 untersucht. Konsequente Einzelfundeinmessung ermöglichte die Projizierung aller Funde auf eines der längs zum Hang verlaufenden Profile. Koordinatentransformation der Funde von der Profilansicht in die Draufsicht, ermöglichte die Visualisierung in einem GIS. Die Zusammenfassung benachbarter Schichten auf Basis der bodenkundlich-sedimentologischen Ansprache ermöglichte eine verbesserte Datierung der Kolluvien. Zusätzlich ermöglichte diese Methode die Datierung historischer Pegelstände der Beetzseekette, eines Teils des Flusssystems der Havel. Im Ergebnis ließen sich für die spätslawische Zeit starke anthropogene Aktivitäten wie Mergelabbau und eine Uferbegradigung nachweisen. Über einen Verzahnungshorizont limnischer und kolluvialer Sedimente. ließ sich ein Pegelanstieg des Oberen Beetzsees von einem Wert unterhalb von 29.4 m Normalhöhennull (NHN) im 11./12. Jahrhundert u.Z. auf etwa 29.8 m NHN im 13. Jahrhundert u.Z. feststellen. Es lassen sich für das 13. Jahrhundert u.Z. jedoch auch vereinzelte Überschwemmungsereignisse bis in eine Höhe von 30.5 m NHN fassen. Ein modernes Kolluvium von einem Meter Mächtigkeit zeigt die akute Gefährdung des Bodendenkmals durch die moderne Landwirtschaft

    Compost and digestate: sustainability, benefits, impacts for the environment and for plant production

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    This proceedings volume contains the papers presented at the CODIS 2008 congress held on 27 - 29 February 2008 in Solothurn (Switzerland).The composting and digestion of biogenic waste materials and the subsequent application of compost and digestate to soil contributes to nutrient recycling and renewable energy production. Moreover, compost and digestate can improve soil fertility and suppress plant diseases. On the other hand, compost and digestate may also contain a variety of pollutants hazardous to soil, such as heavy metals and organic contaminants.Compost and digestate have been thoroughly investigated in the framework of two associated projects entitled Organic Pollutants in Compost and Digestate in Switzerland and Effects of Composts and Digestate on the Environment, Soil Fertility and Plant Health. These projects yielded new insights into the properties of compost and digestate, mainly with regard to biological parameters and the occurrence of both classic and emerging organic pollutants.The CODIS 2008 congress was the final event of these two projects

    Biomechanical factors may explain why grasping violates Weber's law

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    Copyright © 2015. Published by Elsevier Ltd. Acknowledgments The experiment was part of N. Aschenneller’s MD thesis. The study was funded by the Staedtler Stiftung (Nuremberg, Germany).Peer reviewedPostprin

    Temporal order judgments and presaccadic shifts of attention: What can prior entry teach us about the premotor theory?

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    A temporal order judgment (TOJ) 2-alternative forced choice design was used to examine presaccadic shifts of attention. Prior work on the premotor theory of attention (PTA) has predominantly focused on single-target discrimination tasks as a tool to measure accuracy and shifts of attention. It is important to demonstrate that the PTA is effective across attentional tasks that have been shown to be reliable in other contexts. Therefore, it was decided to use a perceptual task that probes multiple locations simultaneously and can equally be used to examine spatial spread of attention in more detail. In typical TOJ studies, prior entry is the metric used to measure an attentional effect. Prior entry is the biasing of temporal perception toward an attentionally cued location. This generally manifests as observers processing events at the cued location more rapidly, altering their perspective of temporal order. Participants were required to prepare saccades toward one of four targets, two of which would light up either synchronously or sequentially after a GO signal but before saccadic execution. Results demonstrated that in conditions with critical stimulus onset asynchronies, saccade preparation had a significant effect on performance. Prior entry effects were observed at saccade congruent locations with probes at these locations being typically perceived earlier than probes presented at a neutral location. These effects were not observed in control trials without a saccade. A further spatial effect was demonstrated for the attentional modulation, suggesting that this effect is restricted predominantly to horizontal configurations. Overall, results demonstrated that presaccadic attention is effective at eliciting a prior entry effect in TOJ designs and that such effects are more pronounced when the probes are distributed across the two lateral hemifields

    Avoiding unseen obstacles : Subcortical vision is not sufficient to maintain normal obstacle avoidance behaviour during reaching

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    Acknowledgement This work was funded by the RS MacDonald Charitable Trust (awarded to C. Hesse in June 2013). T. Schenk was supported by a grant from the German Research Council (DFG – SCHE 735/3-1). The authors would like to thank Dr Stefanie Biehl for her valuable advice on lesion localisation based on the CT and MRI scans of the patients. We would also like to thank all the patients for taking part in our experiments and for giving up so much of their free time.Peer reviewedPostprin

    The functional subdivision of the visual brain : Is there a real illusion effect on action? A multi-lab replication study

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    Acknowledgements We thank Brian Roberts and Mike Harris for responding to our questions regarding their paper; Zoltan Dienes for advice on Bayes factors; Denise Fischer, Melanie Römer, Ioana Stanciu, Aleksandra Romanczuk, Stefano Uccelli, Nuria Martos Sánchez, and Rosa María Beño Ruiz de la Sierra for help collecting data; Eva Viviani for managing data collection in Parma. We thank Maurizio Gentilucci for letting us use his lab, and the Centro Intradipartimentale Mente e Cervello (CIMeC), University of Trento, and especially Francesco Pavani for lending us his motion tracking equipment. We thank Rachel Foster for proofreading. KKK was supported by a Ph.D. scholarship as part of a grant to VHF within the International Graduate Research Training Group on Cross-Modal Interaction in Natural and Artificial Cognitive Systems (CINACS; DFG IKG-1247) and TS by a grant (DFG – SCHE 735/3-1); both from the German Research Council.Peer reviewedPostprin
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