Prof. Dr. York Winter

Profil

• Cluster: Neuro Cure - Animal Outcome Unit

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  Förderer: DFG Exzellenzinitiative Cluster Zeitraum: 03/2010 - 10/2012 Projektleitung: Prof. Dr. York Winter

• Cluster NeuroCure II: Animal Outcome

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  Förderer: DFG Exzellenzinitiative Cluster Zeitraum: 11/2012 - 10/2017 Projektleitung: Prof. Dr. York Winter

• Cognition Mediated Floral Evolution: Pollinator Decision Making in a Virtual Pollination Ecology Paradigm

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  Förderer: Volkswagen Stiftung Zeitraum: 06/2009 - 12/2012 Projektleitung: Prof. Dr. York Winter

• Erfassung kognitiver Parameter bei Mäusen mit Hilfe touch-screen-basierter, operanter Systeme

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  Förderer: DFG sonstige Programme Zeitraum: 10/2014 - 12/2017 Projektleitung: Prof. Dr. York Winter

• Evidence Based Cultural Medicine

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  Förderer: Bundesministerium für Forschung, Technologie und Raumfahrt Zeitraum: 07/2016 - 08/2017 Projektleitung: Prof. Dr. York Winter

• Künstliche Intelligenz zur Verhaltensdiagnostik

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  Förderer: Bundesministerium für Forschung, Technologie und Raumfahrt Zeitraum: 04/2020 - 12/2022 Projektleitung: Prof. Dr. York Winter

• Laufkompensator

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  Zeitraum: 09/2012 - 11/2012 Projektleitung: Prof. Dr. York Winter

• Lieferung eines Virtual Reality Systems für das Deutsche Zentrum für Degenerative Erkrankungen

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  Zeitraum: 01/2013 - 04/2013 Projektleitung: Prof. Dr. York Winter

• Lokomotionssensor

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  Förderer: Wirtschaftsunternehmen / gewerbliche Wirtschaft Zeitraum: 06/2010 - 12/2010 Projektleitung: Prof. Dr. York Winter

• Lokomotionssensor II

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  Zeitraum: 10/2011 - 06/2012 Projektleitung: Prof. Dr. York Winter

• Patientendrehstuhl mit Eingabegerät

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  Zeitraum: 11/2010 - 12/2010 Projektleitung: Prof. Dr. York Winter

• PhenoBase – Database for Habit-Survey and Mouse Models

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  Förderer: Bundesministerium für Wirtschaft und Energie Zeitraum: 07/2015 - 06/2016 Projektleitung: Prof. Dr. York Winter

• RFID-automatisierte Sortieranlage für Vögel

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  Zeitraum: 04/2012 - 06/2012 Projektleitung: Prof. Dr. York Winter

• SFB 1315/1: Experimentelle Technologien für Tierverhalten und -training (TP C02)

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  Förderer: DFG Sonderforschungsbereich Zeitraum: 07/2018 - 06/2022 Projektleitung: Prof. Dr. York Winter

• SFB 1315/2: Experimentelle Technologien für Tierverhalten und -training (TP C02)

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  Förderer: DFG Sonderforschungsbereich Zeitraum: 07/2022 - 06/2026 Projektleitung: Prof. Dr. York Winter

• Somatosensorische virtuelle Realität für die Gehirnforschung

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  Förderer: Einstein Stiftung Berlin Zeitraum: 04/2013 - 03/2016 Projektleitung: Prof. Dr. York Winter

• Tierexperimentelle Verhaltensforschung für Krankheitsmodelle in Neurologie und Psychiatrie

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  Zeitraum: 01/2015 - 03/2017 Projektleitung: Prof. Dr. York Winter

• Tierversuchsfreie Verhaltensdiagnostik

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  Förderer: Bundesministerium für Forschung, Technologie und Raumfahrt Zeitraum: 02/2015 - 07/2018 Projektleitung: Prof. Dr. York Winter

• Virtual Reality Servo Ball

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  Zeitraum: 01/2013 - 08/2013 Projektleitung: Prof. Dr. York Winter

• space application services

  PT

  39 Treffer60.2%
  • INTeractive RObotics Research Network
    P

    60.2%

• ROBOSOFT Services Robots

  PT

  38 Treffer60.2%
  • INTeractive RObotics Research Network
    P

    60.2%

• Velamed GmbH Medizintechnik & Biomechanische Konzepte, Köln

  PT

  22 Treffer58.1%
  • EXGAVINE: Bewegungsspiele in der Virtuellen Realität als Therapieform neurologischer Erkrankungen
    P

    58.1%

• RetroBrain R&D UG

  PT

  22 Treffer58.1%
  • EXGAVINE: Bewegungsspiele in der Virtuellen Realität als Therapieform neurologischer Erkrankungen
    P

    58.1%

• Science & Startups Berlin

  T

  17 Treffer57.6%
  • Zuwendung im Rahmen des Programms „exist – Existenzgründungen aus der Wissenschaft“ aus dem Bundeshaushalt, Einzelplan 09, Kapitel 02, Titel 68607, Haushaltsjahr 2026, sowie aus Mitteln des Europäischen Strukturfonds (hier Euro-päischer Sozialfonds Plus – ESF Plus) Förderperiode 2021-2027 – Kofinanzierung für das Vorhaben: „exist Women“
    T

    57.6%

• BGG Berliner Gesellschaft für Großaquarien mbH

  PT

  69 Treffer57.0%
  • Entwicklung einer kamerabasierten Lösung für die Detektion des Bewegungsverhaltens und die Bestimmung des Längen- und Massenwachstums
    P

    57.0%

• cubeoffice GmbH & Co.KG

  PT

  70 Treffer57.0%
  • Entwicklung einer kamerabasierten Lösung für die Detektion des Bewegungsverhaltens und die Bestimmung des Längen- und Massenwachstums
    P

    57.0%

• SoftBank Robotics

  PT

  24 Treffer56.9%
  • Embodied Audition for RobotS
    P

    56.9%

• InnovationLab GmbH

  P

  9 Treffer56.5%
  • Interfaces in opto-electronic thin film multilayer devices
    P

    56.5%

• KOPF, HAND + FUSS gemeinnützige Gesellschaft für Bildung mbH

  PT

  21 Treffer55.9%
  • WayIn – Der Inklusionswegweiser für Arbeitgeber: Technische Entwicklung und wissenschaftliche Begleitanalyse
    T

    55.9%

• Inhibition of IL-12/IL-23 signaling reduces Alzheimer's disease–like pathology and cognitive decline

  2012

  Nature Medicine · 413 Zitationen · DOI

• Bat Flight Generates Complex Aerodynamic Tracks

  2007

  Science · 222 Zitationen · DOI

  The flapping flight of animals generates an aerodynamic footprint as a time-varying vortex wake in which the rate of momentum change represents the aerodynamic force. We showed that the wakes of a small bat species differ from those of birds in some important respects. In our bats, each wing generated its own vortex loop. Also, at moderate and high flight speeds, the circulation on the outer (hand) wing and the arm wing differed in sign during the upstroke, resulting in negative lift on the hand wing and positive lift on the arm wing. Our interpretations of the unsteady aerodynamic performance and function of membranous-winged, flapping flight should change modeling strategies for the study of equivalent natural and engineered flying devices.

• Ultraviolet vision in a bat

  2003

  Nature · 148 Zitationen · DOI

• The energy cost of flight: do small bats fly more cheaply than birds?

  1998

  Journal of Comparative Physiology B · 148 Zitationen · DOI

• Absent or Low Rate of Adult Neurogenesis in the Hippocampus of Bats (Chiroptera)

  2007

  PLoS ONE · 123 Zitationen · DOI

  Bats are the only flying mammals and have well developed navigation abilities for 3D-space. Even bats with comparatively small home ranges cover much larger territories than rodents, and long-distance migration by some species is unique among small mammals. Adult proliferation of neurons, i.e., adult neurogenesis, in the dentate gyrus of rodents is thought to play an important role in spatial memory and learning, as indicated by lesion studies and recordings of neurons active during spatial behavior. Assuming a role of adult neurogenesis in hippocampal function, one might expect high levels of adult neurogenesis in bats, particularly among fruit- and nectar-eating bats in need of excellent spatial working memory. The dentate gyrus of 12 tropical bat species was examined immunohistochemically, using multiple antibodies against proteins specific for proliferating cells (Ki-67, MCM2), and migrating and differentiating neurons (Doublecortin, NeuroD). Our data show a complete lack of hippocampal neurogenesis in nine of the species (Glossophaga soricina, Carollia perspicillata, Phyllostomus discolor, Nycteris macrotis, Nycteris thebaica, Hipposideros cyclops, Neoromicia rendalli, Pipistrellus guineensis, and Scotophilus leucogaster), while it was present at low levels in three species (Chaerephon pumila, Mops condylurus and Hipposideros caffer). Although not all antigens were recognized in all species, proliferation activity in the subventricular zone and rostral migratory stream was found in all species, confirming the appropriateness of our methods for detecting neurogenesis. The small variation of adult hippocampal neurogenesis within our sample of bats showed no indication of a correlation with phylogenetic relationship, foraging strategy, type of hunting habitat or diet. Our data indicate that the widely accepted notion of adult neurogenesis supporting spatial abilities needs to be considered carefully. Given their astonishing longevity, certain bat species may be useful subjects to compare adult neurogenesis with other long-living species, such as monkeys and humans, showing low rates of adult hippocampal neurogenesis.

• Energetic cost of hovering flight in nectar-feeding bats (Phyllostomidae: Glossophaginae) and its scaling in moths, birds and bats

  1999

  Journal of Comparative Physiology B · 120 Zitationen · DOI

• The Cost of Hovering and Forward Flight in a Nectar-Feeding Bat, <i>Glossophaga Soricina</i>, Estimated From Aerodynamic Theory

  1993

  Journal of Experimental Biology · 103 Zitationen · DOI

  Energy expenditure during flight in animals can best be understood and quantified when both theoretical and empirical approaches are used concurrently. This paper examines one of four methods that we have used to estimate the cost of flight in a neotropical nectar-feeding bat Glossophaga soricina (Phyllostomidae), namely the use of kinematic and morphological data and aerodynamic theory to estimate the mechanical power requirements (power output) for hovering and horizontal forward flight. A hot-wire anemometer was used to measure induced velocity (the velocity of air accelerated by the wings) during hovering in order to estimate induced power. Our estimate of aerodynamic power (the sum of induced, profile and parasite powers) required for a 0.0105 kg G. soricina to hover is 0.15 W and our estimate of the inertial power (the power required to oscillate the wings) is 0.19 W. Thus, the total mechanical power for hovering is 0.34 W or 32.4 W kg-1. The mechanical power required for horizontal forward flight, near the minimum power flight speed (4.2 ms-1) for a 0.0117 kg bat is 0.14 W (12.3 W kg-1), of which 0.10 W is aerodynamic power and 0.042 W is inertial power. Comparison with our results on metabolic power requirements estimated from nectar intake gives a mechanical efficiency of 0.15 for hovering flight and 0.11 for forward flight near the minimum power speed.

• Foraging in a complex naturalistic environment: capacity of spatial working memory in flower bats

  2005

  Journal of Experimental Biology · 101 Zitationen · DOI

  Memory systems have evolved under selection pressures, such as the need to remember the locations of resources or past events within spatiotemporally dynamic natural environments. The full repertoire of complex behaviours exhibited by animals in dynamic surroundings are, however, difficult to elicit within simply structured laboratory environments. We have developed a computer-controlled naturalistic environment with 64 feeders for simulating dynamic patterns of water or food resource availability (depletion and replenishment) within the laboratory. The combination of feeder and cage remote control permits the automated transfer of animals between cage and test arena and, therefore, high experimental throughput and minimal disturbance to the animals (bats and mice). In the present study, we investigated spatial working memory in nectar-feeding bats (Glossophaga soricina, Phyllostomidae) collecting food from a 64-feeder array. Feeders gave only single rewards within trials so that efficient foraging required bats to avoid depleted locations. Initially, bats tended to revisit feeders (win-stay), but within three trials changed towards a win-shift strategy. The significant avoidance of revisits could not be explained by algorithmic search guiding movement through the array nor by scent cues left by the bats themselves and, thus, the data suggest that bats remembered spatial locations depleted of food. An examination of the recency effect on spatial working memory after bats shifted to a win-shift strategy indicated that bats held more than 40 behaviour actions (feeder visits) in working memory without indication of decay. This result surpasses previous findings for other taxa.

• Kinematics of flight and the relationship to the vortex wake of a Pallas' long tongued bat (<i>Glossophaga soricina</i>)

  2010

  Journal of Experimental Biology · 94 Zitationen · DOI

  To obtain a full understanding of the aerodynamics of animal flight, the movement of the wings, the kinematics, needs to be connected to the wake left behind the animal. Here the detailed 3D wingbeat kinematics of bats, Glossophaga soricina, flying in a wind tunnel over a range of flight speeds (1-7 m s(-1)) was determined from high-speed video. The results were compared with the wake geometry and quantitative wake measurements obtained simultaneously to the kinematics. The wingbeat kinematics varied gradually with flight speed and reflected the changes observed in the wake of the bats. In particular, several of the kinematic parameters reflected the differences in the function of the upstroke at low and high flight speeds. At lower flight speeds the bats use a pitch-up rotation to produce a backward flick which creates thrust and some weight support. At higher speeds this mechanism disappears and the upstroke generates weight support but no thrust. This is reflected by the changes in e.g. angle of attack, span ratio, camber and downstroke ratio. We also determined how different parameters vary throughout a wingbeat over the flight speeds studied. Both the camber and the angle of attack varied over the wingbeat differently at different speeds, suggesting active control of these parameters to adjust to the changing aerodynamic conditions. This study of the kinematics strongly indicates that the flight of bats is governed by an unsteady high-lift mechanism at low flight speeds and points to differences between birds and bats.

• Compromised fidelity of endocytic synaptic vesicle protein sorting in the absence of stonin 2

  2013

  Proceedings of the National Academy of Sciences · 86 Zitationen · DOI

  Neurotransmission depends on the exocytic fusion of synaptic vesicles (SVs) and their subsequent reformation either by clathrin-mediated endocytosis or budding from bulk endosomes. How synapses are able to rapidly recycle SVs to maintain SV pool size, yet preserve their compositional identity, is poorly understood. We demonstrate that deletion of the endocytic adaptor stonin 2 (Stn2) in mice compromises the fidelity of SV protein sorting, whereas the apparent speed of SV retrieval is increased. Loss of Stn2 leads to selective missorting of synaptotagmin 1 to the neuronal surface, an elevated SV pool size, and accelerated SV protein endocytosis. The latter phenotype is mimicked by overexpression of endocytosis-defective variants of synaptotagmin 1. Increased speed of SV protein retrieval in the absence of Stn2 correlates with an up-regulation of SV reformation from bulk endosomes. Our results are consistent with a model whereby Stn2 is required to preserve SV protein composition but is dispensable for maintaining the speed of SV recycling.

• Hierarchical strategy for relocating food targets in flower bats: spatial memory versus cue-directed search

  2004

  Animal Behaviour · 83 Zitationen · DOI

• Actuator disk model and span efficiency of flapping flight in bats based on time-resolved PIV measurements

  2011

  Experiments in Fluids · 80 Zitationen · DOI

• Early-life environmental enrichment generates persistent individualized behavior in mice

  2020

  Science Advances · 77 Zitationen · DOI

  Individuals differ in their response to environmental stimuli, but the stability of individualized behaviors and their associated changes in brain plasticity are poorly understood. We developed a novel model of enriched environment to longitudinally monitor 40 inbred mice exploring 35 connected cages over periods of 3 to 6 months. We show that behavioral individuality that emerged during the first 3 months of environmental enrichment persisted when mice were withdrawn from the enriched environment for 3 additional months. Behavioral trajectories were associated with stable interindividual differences in adult hippocampal neurogenesis and persistent epigenetic effects on neuronal plasticity genes in the hippocampus. Using genome-wide DNA methylation sequencing, we show that one-third of the DNA methylation changes were maintained after withdrawal from the enriched environment. Our results suggest that, even under conditions that control genetic background and shared environment, early-life experiences result in lasting individualized changes in behavior, brain plasticity, and epigenetics.

• Wing beat kinematics of a nectar-feeding bat,<i>Glossophaga soricina,</i>flying at different flight speeds and Strouhal numbers

  2006

  Journal of Experimental Biology · 76 Zitationen · DOI

  High-speed film analysis showed that the wing beat kinematics in Glossophaga soricina change gradually with increasing flight speed, indicating that there is no sudden gait change at any particular, critical, flight speed. The flight of two adult specimens was studied over a range of flight speeds (1.23-7.52 ms(-1)) in a 30 m long flight tunnel. During the upstroke in hovering and slow flight there is a tip-reversal or supination of the handwings, which thus produce a backward flick. This backward motion successively disappears at speeds V approximately 3.2 ms(-1), above which the wingtip path becomes more vertical or directed upwards-forwards relative to the still air (the stroke plane angle increasing with flight speed as alpha=44.8V(0.29)). We found no correlations between either span ratio SR (the ratio of the wing span on the upstroke to that on the downstroke) and V, or downstroke ratio (the duration of the downstroke divided by the total stroke period) and V. On the other hand, SR decreases significantly with increasing wing beat frequency f, SR proportional to f(-0.40). The Strouhal number (St=f x amplitude/V), a dimensionless parameter describing oscillating flow mechanisms and being a predictor of the unsteadiness of the flow, decreases with the speed as St proportional to V(-1.37). Close to the theoretical minimum power speed (4-6 m s(-1)) G. soricina operates with a Strouhal number in the region 0.17<St<0.22, which is associated with efficient lift and thrust production. At slower speeds, 3.4-4 m s(-1), St is 0.25-0.4, which is still within the favourable region. But at speeds below 3 m s(-1) St becomes higher (0.5<St<0.68), indicating that unsteady effects become important, with unfavourable lift and thrust production as a result. Only at these speeds do the bats perform the backward flick during the upstroke, which may produce thrust. This may serve as a compensation in some bats and birds to increase aerodynamic performance.

• OPERATIONAL TONGUE LENGTH IN PHYLLOSTOMID NECTAR-FEEDING BATS

  2003

  Journal of Mammalogy · 75 Zitationen · DOI

  Glossophagine bats (Phyllostomidae, Glossophaginae) are specialized visitors to the flowers of several hundred species of neotropical plants. They are able to exploit flowers in hovering flight by imbibing nectar with a highly protrusile brush-tip tongue. As tongue extension is achieved by muscular and vasohydraulic mechanisms, its operational length can be inferred only from actively feeding animals. For this study, we measured maximum tongue extensions during nectar feeding in 9 species of glossophagine bats. We trained bats to feed from vertically oriented glass test tubes (9-and 15-mm inside diameter). The maximum depth of nectar drainage by a bat was recorded as maximum operational tongue length. Measured operational tongue lengths were in the range of the total body length of bats. The record length was 77 mm (in tubes with 15-mm inside diameter) in the 17-g flower specialist Choeronycteris mexicana. This compares with only 11-24 mm in the nonglossophagine frugivorous bat Carollia perspicillata, an opportunistic nectar feeder. The capacity for tongue extension proves the specialized status of neotropical glossophagines as flower visitors and clearly distinguishes them anatomically and ecologically from nonglossophagine nectar-feeding bats.

• Longitudinal intravital imaging of the femoral bone marrow reveals plasticity within marrow vasculature

  2017

  Nature Communications · 72 Zitationen · DOI

  The bone marrow is a central organ of the immune system, which hosts complex interactions of bone and immune compartments critical for hematopoiesis, immunological memory, and bone regeneration. Although these processes take place over months, most existing imaging techniques allow us to follow snapshots of only a few hours, at subcellular resolution. Here, we develop a microendoscopic multi-photon imaging approach called LIMB (longitudinal intravital imaging of the bone marrow) to analyze cellular dynamics within the deep marrow. The approach consists of a biocompatible plate surgically fixated to the mouse femur containing a gradient refractive index lens. This microendoscope allows highly resolved imaging, repeatedly at the same regions within marrow tissue, over months. LIMB reveals extensive vascular plasticity during bone healing and steady-state homeostasis. To our knowledge, this vascular plasticity is unique among mammalian tissues, and we expect this insight will decisively change our understanding of essential phenomena occurring within the bone marrow.

• Comparing Aerodynamic Efficiency in Birds and Bats Suggests Better Flight Performance in Birds

  2012

  PLoS ONE · 71 Zitationen · DOI

  Flight is one of the energetically most costly activities in the animal kingdom, suggesting that natural selection should work to optimize flight performance. The similar size and flight speed of birds and bats may therefore suggest convergent aerodynamic performance; alternatively, flight performance could be restricted by phylogenetic constraints. We test which of these scenarios fit to two measures of aerodynamic flight efficiency in two passerine bird species and two New World leaf-nosed bat species. Using time-resolved particle image velocimetry measurements of the wake of the animals flying in a wind tunnel, we derived the span efficiency, a metric for the efficiency of generating lift, and the lift-to-drag ratio, a metric for mechanical energetic flight efficiency. We show that the birds significantly outperform the bats in both metrics, which we ascribe to variation in aerodynamic function of body and wing upstroke: Bird bodies generated relatively more lift than bat bodies, resulting in a more uniform spanwise lift distribution and higher span efficiency. A likely explanation would be that the bat ears and nose leaf, associated with echolocation, disturb the flow over the body. During the upstroke, the birds retract their wings to make them aerodynamically inactive, while the membranous bat wings generate thrust and negative lift. Despite the differences in performance, the wake morphology of both birds and bats resemble the optimal wake for their respective lift-to-drag ratio regimes. This suggests that evolution has optimized performance relative to the respective conditions of birds and bats, but that maximum performance is possibly limited by phylogenetic constraints. Although ecological differences between birds and bats are subjected to many conspiring variables, the different aerodynamic flight efficiency for the bird and bat species studied here may help explain why birds typically fly faster, migrate more frequently and migrate longer distances than bats.

• Kinematics and wing shape across flight speed in the bat,<i>Leptonycteris yerbabuenae</i>

  2012

  Biology Open · 71 Zitationen · DOI

  The morphology and kinematics of a flying animal determines the resulting aerodynamic lift through the regulation of the speed of the air moving across the wing, the wing area and the lift coefficient. We studied the detailed three-dimensional wingbeat kinematics of the bat, Leptonycteris yerbabuenae, flying in a wind tunnel over a range of flight speeds (0-7 m/s), to determine how factors affecting the lift production vary across flight speed and within wingbeats. We found that the wing area, the angle of attack and the camber, which are determinants of the lift production, decreased with increasing speed. The camber is controlled by multiple mechanisms along the span, including the deflection of the leg relative to the body, the bending of the fifth digit, the deflection of the leading edge flap and the upward bending of the wing tip. All these measures vary throughout the wing beat suggesting active or aeroelastic control. The downstroke Strouhal number, St(d), is kept relatively constant, suggesting that favorable flow characteristics are maintained during the downstroke, across the range of speeds studied. The St(d) is kept constant through changes in the stroke plane, from a strongly inclined stroke plane at low speeds to a more vertical stroke plane at high speeds. The mean angular velocity of the wing correlates with the aerodynamic performance and shows a minimum at the speed of maximum lift to drag ratio, suggesting a simple way to determine the optimal speed from kinematics alone. Taken together our results show the high degree of adjustments that the bats employ to fine tune the aerodynamics of the wings and the correlation between kinematics and aerodynamic performance.

• High-speed stereo DPIV measurement of wakes of two bat species flying freely in a wind tunnel

  2009

  Experiments in Fluids · 66 Zitationen · DOI

• The near and far wake of Pallas' long tongued bat (<i>Glossophaga soricina</i>)

  2008

  Journal of Experimental Biology · 58 Zitationen · DOI

  SUMMARY The wake structures of a bat in flight have a number of characteristics not associated with any of the bird species studied to this point. Unique features include discrete vortex rings generating negative lift at the end of the upstroke at medium and high speeds, each wing generating its own vortex loop,and a systematic variation in the circulation of the start and stop vortices along the wingspan, with increasing strength towards the wing tips. Here we analyse in further detail some previously published data from quantitative measurements of the wake behind a small bat species flying at speeds ranging from 1.5 to 7 m s–1 in a wind tunnel. The data are extended to include both near- and far-wake measurements. The near-/far-wake comparisons show that although the measured peak vorticity of the start and stop vortices decreases with increasing downstream distance from the wing, the total circulation remains approximately constant. As the wake evolves, the diffuse stop vortex shed at the inner wing forms a more concentrated vortex in the far wake. Taken together, the results show that studying the far wake,which has been the standard procedure, nevertheless risks missing details of the wake. Although study of the far wake alone can lead to the misinterpretation of the wake topology, the net, overall circulation of the main wake vortices can be preserved so that approximate momentum balance calculations are not unreasonable within the inevitably large experimental uncertainties.

• Comparative aerodynamic performance of flapping flight in two bat species using time-resolved wake visualization

  2011

  Journal of The Royal Society Interface · 56 Zitationen · DOI

  Bats are unique among extant actively flying animals in having very flexible wings, controlled by multi-jointed fingers. This gives the potential for fine-tuned active control to optimize aerodynamic performance throughout the wingbeat and thus a more efficient flight. But how bat wing performance scales with size, morphology and ecology is not yet known. Here, we present time-resolved fluid wake data of two species of bats flying freely across a range of flight speeds using stereoscopic digital particle image velocimetry in a wind tunnel. From these data, we construct an average wake for each bat species and speed combination, which is used to estimate the flight forces throughout the wingbeat and resulting flight performance properties such as lift-to-drag ratio (L/D). The results show that the wake dynamics and flight performance of both bat species are similar, as was expected since both species operate at similar Reynolds numbers (Re) and Strouhal numbers (St). However, maximum L/D is achieved at a significant higher flight speed for the larger, highly mobile and migratory bat species than for the smaller non-migratory species. Although the flight performance of these bats may depend on a range of morphological and ecological factors, the differences in optimal flight speeds between the species could at least partly be explained by differences in their movement ecology.

• Learning real-life cognitive abilities in a novel 360°-virtual reality supermarket: a neuropsychological study of healthy participants and patients with epilepsy

  2013

  Journal of NeuroEngineering and Rehabilitation · 54 Zitationen · DOI

  Learning effects in our paradigm extend beyond mere verbal learning of the shopping list as the data show evidence for multi-layered learning (at least visual-spatial, strategic, and verbal) on concordant measures. Importantly, learning also correlated with measures of figural-spatial memory and the degree of immersion into the VR. We propose that cognitive training with the VR supermarket program in the OctaVis will be efficient for the assessment and training of real-life cognitive abilities in healthy subjects and patients with epilepsy. It is most likely that our findings will also apply for patients with cognitive disabilities resulting from other neurological and psychiatric syndromes.

• Bats as pollinators: foraging energetics and floral adaptations

  2001

  Cambridge University Press eBooks · 51 Zitationen · DOI

  Bat pollination is a pan-tropical phenomenon, performed in the Old World by small megachiropterans (Pteropodidae) and in the New World by microchiropterans of the leaf-nosed bat family Phyllostomidae (Dobat 1985). Flower-visiting bat species total about 50 worldwide, while Dobat (1985) listed about 750 bat-pollinated plant species in 270 genera (590 for the Neo- and 160 for the Palaeotropics). Since then, many more cases have been found.

• ZOO-FISH Analysis in a Species of the Order Chiroptera: Glossophaga soricina (Phyllostomidae)

  1999

  Chromosome Research · 51 Zitationen · DOI

• A sorting system with automated gates permits individual operant experiments with mice from a social home cage

  2011

  Journal of Neuroscience Methods · 50 Zitationen · DOI

• Charité – Universitätsmedizin Berlin

  SFB 1315/2: Experimentelle Technologien für Tierverhalten und -training (TP C02)

  university

• Hebrew University of Jerusalem

  Somatosensorische virtuelle Realität für die Gehirnforschung

  university

Name

Prof. Dr. York Winter

Titel

Prof. Dr.

Fakultät

Lebenswissenschaftliche Fakultät

Institut

Institut für Biologie

Arbeitsgruppe

Kognitive Neurobiologie

Telefon

+49 30 2093-47940

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26.4.2026, 01:14:15