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594 results for “REACH”
Reaching and grasping objects in depth for people with stereovision deficits and healthy controls.
<p>Decades of research into hand-object interaction and manipulation skills has yielded fundamental insights with applications in robotics and motor learning. Nevertheless, integrating visual function (especially binocular function, important to perceive depth) into this equation is crucial, forming a triangle between vision, reaching, and object manipulation.</p> <p> </p> <p>The ReGraD dataset provides kinematic data during hand-object interaction in monocular and binocular conditions at different depths and monocular/binocular conditions. It comprises two sub-datasets: ReGraD A (two measurements) can determine its test-retest reliability, whilst ReGraD B (one measurement) can characterize individuals with and without visual disorders. ReGraD includes 35 controls and 3 patients with amblyopia aged 6 to 35.</p> <p> </p> <p>The ReGraD dataset may aid to (1) gain insights into hand-object interaction under various eye conditions and depths, (2) assess reliability and reproducibility and (3) examine the effects of groups (control vs. patients) and age, among others. The ReGraD dataset contains raw data that can also be used to develop algorithms for data segmentation and data interpolation in the kinematic field.</p>
In-home Obesity Prevention to Reach Low-income Infants
ClinicalTrials.gov study NCT03529695. IPD Sharing: YES. Countries: 1. Publications: 1.
Cognitive-based Prosthetics to Improve Grasp and Reaching After SCI
ClinicalTrials.gov study NCT04577573. IPD Sharing: YES. Countries: 1. Publications: 1.
Data from: Reaching new heights: Arboreal ant diversity in a North American temperate forest ecosystem
Open the record for dataset details and reuse information.
Opinion dynamics in social network under competition: the role of influencing factors in consensus reaching
Open the record for dataset details and reuse information.
Data from: Does losing reduce the tendency to engage with rivals to reach mates? An experimental test
Open the record for dataset details and reuse information.
Dissociable use-dependent processes for volitional goal-directed reaching
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High-frequency sensor data collected by Stroud Water Research Center in a recovery reach of White Clay Creek site ID WCC017 from April through December 2018
High-frequency sensor data at 5-min intervals using a s::can®oxy::lizer IITM and Solinst level logger, an Apogee SQ-212 sensor, and an s::can® field spectrophotometer in a recovery reach at White Clay Creek from April through December 2018. These data were collected as part of a study focused on baseflow dynamics of DOC and nitrate in White Clay Creek, Stroud Water Research Center. The parameters in this data package are water temperature, dissolved oxygen, depth, Photosynthetically Active Radiation (PAR), dissolved oxygen concentration, dissolved organic carbon concentration (DOC) and nitrate concentration. Data are presented in two tables. All the parameters and table are further explained in the metadata.
Non-native weed reaches community dominance under the canopy of native tree
Whether facilitation from native plants is strong enough to trigger community dominance by non-natives remains unclear. We explored the possibility that facilitation from Prosopis caldenia, the dominant native tree in the semiarid open forest of central Argentina, drives local community dominance by Chenopodium album, an annual herb native to Europe. We assessed this hypothesis by conducting extensive field sampling in which we recorded the relative abundance of species growing under the canopy of P. caldenia (caldén microsites) and in adjacent locations free of this tree (open microsites). If our hypothesis is correct, then the relative abundance of C. album will be greater than that of the rest of the species only when growing under P. caldenia. Also, we measured C. album performance, estimated its soil seed bank, and characterized growing conditions in caldén and open microsites. We found that the relative abundance of C. album was over seven times greater than that of any other species in communities occurring in caldén microsites; by contrast, C. album co-dominated communities with several other species in the open. Chenopodium album density, cover, biomass, and fecundity were all several times greater in caldén than open microsites. Similarly, C. album seed bank displayed an eight-fold increase in caldén as compared to open microsites. Growing conditions were markedly different between microsites, which could explain positive responses from C. album. Our results suggest that facilitation from natives is indeed strong enough to trigger local community dominance by non-natives, advancing the understanding of community-level consequences of this interaction.
High-frequency sensor turbidity data collected by Stroud Water Research Center in a meadow reach of White Clay Creek site ID WCC017 from January 2014 through May 2021
High-frequency sensor data from a Campbell Scientific OSB3 (every 5-minutes) in a recovery reach at White Clay Creek from January 2014 through May 2021. Funded by NSF and DEB as part of the LTREB grant to study the recovery of stream ecosystem structure and function during reforestation, Stroud Water Research Center. The parameter in this data package is turbidity. Data are presented in two tables which likely have significant overlap. The raw data table presents the data exactly as it was downloaded from the Aquarius Database. It is formatted as a "wide" human-readable table. Turbidity at White Clay Creek Site WCC017 since 2014 OSB3 presents only the data from the respective sensors. These tables are gap filled for intervals greater than 10 minutes and less than 24 hours, formatted as a "wide" human-readable table. All of the parameters and table are further explained in the metadata.
Epigynal scape large, reaching spermathecae (c2) in An of Zelotibia (Araneae, Gnaphosidae), a spider genus with a species swarm in the Albertine Rift
Epigynal scape large, reaching spermathecae (c2)
Intaglio. Oval intaglio in garnet engraved with a child reaching up to a standing figure of Hariti; behind her a Bactrian inscription.
<p>Intaglio. Oval intaglio in garnet engraved with a child reaching up to a standing figure of Hariti; behind her a Bactrian inscription. British Museum 1892,1103.173.</p>
Decision making in slow and rapid reaching: Sacrificing success to minimize effort
<p>Datasets associated with the following publication:</p> <p>Hesse, C., Kangur, K., & Hunt, A. (2020). Decision making in slow and rapid reaching: Sacrificing success to minimize effort. Cognition</p> <p>The folder contains data files for each of the Experiments as presented in the article. There is a separate description file providing further relevant information for the data files uploaded for each experiment.</p> <p>For further questions, please contact:<br> c.hesse[at]abdn.ac.uk</p>
Title Digitized Social Interactions: Reaching Beyond the Limits of the Naked Eye
<p>The complexity and non-linear dynamics of socio-motor phenomena underlying social interactions are often missed by observation methods that attempt to capture, describe, and rate the exchange in real time. Unknowingly to the rater, socio-motor behaviors of a dyad influence each other through implicit mirroring and shared cohesiveness that escape the naked eye. Implicit in their ratings nonetheless is the assumption that the other participant of the social dyad has an identical nervous system as that of the interlocutor, and that sensory-motor information is processed similarly by both agents’ brains. What happens when this is not the case? We here use the Autism Diagnostic Observation Schedule (ADOS) to formally study social dyadic interactions, at the macro- and micro-level of behaviors, by combining observation with digital data from wearables. We find that integrating subjective and objective data reveals fundamental new ways to improve standard clinical tools more generally into outcome measures of human behaviors and treatment effectiveness.</p> <p>This Supplementary Material contains the results from analyzing the gyroscope data in parallel with the results presented in the main paper from the linear acceleration data. Further the video (animation) explains the advantages of using a hybrid model of pencil and paper with digital biomarkers to advance clinical and basic research.</p>
Changes to anthropogenic pressures on reach-scale rivers in South and Southeast Asia from 1990 to 2014
<p>The data documented the spatiotemporal anthropogenic pressures on reach-scale rivers across South and Southeast Asia from 1990-2014. The data used to produce the results reported in the manuscript "Changes to anthropogenic pressures on reach-scale rivers in South and Southeast Asia from 1990 to 2014".</p> <p>The attributes of the data are explained as follows:</p> <p>(1) "lengthkm": the length (km) of the river reach.</p> <p>(2) "order": stream order of the river reach, from Lin et al. (2019).</p> <p>(3) "nnCCI92": the anthropogenic pressures induced by irrigation in 1992.</p> <p>(4) "nnCCI00": the anthropogenic pressures induced by irrigation in 2000.</p> <p>(5) "nnCCI14": the anthropogenic pressures induced by irrigation in 2014.</p> <p>(6) "nnGHSL90": the anthropogenic pressures induced by human usage in 1990.</p> <p>(7) "nnGHSL00": the anthropogenic pressures induced by human usage in 2000.</p> <p>(8) "nnGHSL14": the anthropogenic pressures induced by human usage in 2014.</p> <p>(9) "sum90": the total anthropogenic pressures on river reaches in 1990.</p> <p>(10) "sum00": the total anthropogenic pressures on river reaches in 2000.</p> <p>(11) "sum14": the total anthropogenic pressures on river reaches in 2014.</p> <p>(12) "mean9014": the average anthropogenic pressures on river reaches from 1990-2014.</p> <p>(13)"domin14": dominant pressure indicator impacting river reaches in 2014. "1" for healthy rivers, "2" for "both human usage and irrigation", "3" for "irrigation", "4" for "human usage".</p> <p><strong>Version 2 updates the anthropogenic pressures on rivers considering the proportion of irrigation taken from groundwater.</strong></p>
Gaze-dependent Coding of Somatosensory Reach Targets after Effector Movement: Testing the Impact of Online Information, Movement Timing, and Target Distance
<p>The uploaded files contain data as SPSS data files (.sav) and tab delimited (.csv) textfiles as well as the respective variable desriptions as images (.png). In particular, I uploaded 1) the raw data, 2) the means of reach errors which we analyzed by repeated-measures ANOVA, and 3) the means of ellipse sizes on which repeated-measures ANOVA of precision were based.</p> <p>After publication of the article, I also uploaded the reported analyses and corresponding datafiles (plus some more material) here: </p> <p>https://doi.org/10.5281/zenodo.821307</p>
Decoding Movement Goals from the Fronto-Parietal Reach Network
<p>Here we provide fMRI data used for MVPA in the following project (for details see data description file):</p> <p>Gertz H, Lingnau A and Fiehler K (2017). Decoding Movement Goals from the Fronto-Parietal Reach Network. <em>Front. Hum. Neurosci.</em> <strong>11</strong>:84. doi: 10.3389/fnhum.2017.00084</p> <p>During reach planning, fronto-parietal brain areas need to transform sensory information into a motor code. It is debated whether these areas maintain a sensory representation of the visual cue or a motor representation of the upcoming movement goal. Here, we present results from a delayed pro-/anti-reach task which allowed for dissociating the position of the visual cue from the reach goal. In this task, the visual cue was combined with a context rule (pro vs. anti) to infer the movement goal. Different levels of movement goal specification during the delay were obtained by presenting the context rule either before the delay together with the visual cue (specified movement goal) or after the delay (underspecified movement goal). By applying fMRI multivoxel pattern analysis (MVPA) we demonstrate movement goal encoding in the left dorsal premotor cortex (PMd) and bilateral superior parietal lobule (SPL) when the reach goal is specified. This suggests that fronto-parietal reach regions maintain a prospective motor code during reach planning. When the reach goal is underspecified, only area PMd but not SPL represents the visual cue position indicating an incomplete state of sensorimotor integration. Moreover, this result suggests a potential role of PMd in movement goal selection.</p>
Dataset supporting "Reach-relevant somatosensory signals modulate tactile suppression"
<p>Here we provide the psychophysical and kinematic data reported in: Gertz, H., Voudouris, D., & Fiehler, K. (2017). Reach-relevant somatosensory signals modulate tactile suppression. <em>Journal of Neurophysiology</em>, jn.00052.2017. http://doi.org/10.1152/jn.00052.2017</p> <p>Tactile stimuli on moving limbs are typically attenuated during reach planning and execution. This phenomenon has been related to internal forward models that predict the sensory consequences of a movement. Tactile suppression is considered to occur due to a match between the actual and predicted sensory consequences of a movement, which might free capacities to process novel or task-relevant sensory signals. Here we examined whether and how tactile suppression depends on the relevance of somatosensory information for reaching. Participants reached with their left or right index finger to the unseen index finger of their other hand (body target) or an unseen pad on a screen (external target). In the body target condition, somatosensory signals from the static hand were available for localizing the reach target. Vibrotactile stimuli were presented on the moving index finger before or during reaching, or in a separate no-movement baseline block, and participants indicated whether they detected a stimulus. As expected, detection thresholds before or during reaching were higher compared to baseline. Tactile suppression was also stronger for reaches to body targets than external targets, as reflected by higher detection thresholds and lower precision of detectability. Moreover, detection thresholds were higher when reaching with the left than with the right hand. Our results suggest that tactile suppression is modulated by position signals from the target limb that are required to successfully reach to the own body. Moreover, limb dominance seems to affect tactile suppression presumably due to disparate uncertainty of feedback signals from the moving limb.</p>
Reaching the limit in autonomous racing: Optimal control versus reinforcement learning
<p>A central question in robotics is how to design a control system for an agile mobile robot. This paper studies this question systematically, focusing on a challenging setting: autonomous drone racing. We show that a neural network controller trained with reinforcement learning (RL) outperformed optimal control (OC) methods in this setting. We then investigated which fundamental factors have contributed to the success of RL or have limited OC. Our study indicates that the fundamental advantage of RL over OC is not that it optimizes its objective better but that it optimizes a better objective. OC decomposes the problem into planning and control with an explicit intermediate representation, such as a trajectory, that serves as an interface. This decomposition limits the range of behaviors that can be expressed by the controller, leading to inferior control performance when facing unmodeled effects. In contrast, RL can directly optimize a task-level objective and can leverage domain randomization to cope with model uncertainty, allowing the discovery of more robust control responses. Our findings allowed us to push an agile drone to its maximum performance, achieving a peak acceleration greater than 12 times the gravitational acceleration and a peak velocity of 108 kilometers per hour. Our policy achieved superhuman control within minutes of training on a standard workstation. This work presents a milestone in agile robotics and sheds light on the role of RL and OC in robot control.</p>
Data for "Statistical characteristics of thunderstorm activity in the middle reaches of the Yangtze River Basin based on a five-year cloud-to-ground lighting dataset"
<p>Data for "Statistical characteristics of thunderstorm activity in the middle reaches of the Yangtze River Basin based on a five-year"</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.