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    2142 research outputs found

    Regularized quantum periods for four-dimensional Fano manifolds

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    Molecular formula prediction for chemical filtering of 3D OrbiSIMS Datasets

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    3D OrbiSIMS raw data required to reproduce figures in the manuscript linked to this repository. File formats are itm., enabling access to both spectral and depth profiling data for each series

    Spatial contiguity determines overshadowing between global-shape representations and stimulus-response associations in human navigation

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    Recent failures to observe cue competition in different preparations, together with the long-standing debate about competition phenomena in the spatial learning literature, have casted doubts on their generality. A recent study (Herrera et al., in press) suggested that strong goal-landmark contiguity might be a critical factor for competition to occur in human spatial navigation. This study aimed to extend those findings and evaluate the effect of goal-landmark contiguity together with variations in the starting-point locations, and the length of training trials. Participants were requested to find an invisible goal (a Wi-Fi hotspot) in a virtual T-Maze. Each group was trained with a landmark placed at different distances from the goal (Proximal, Middle, Distal and Control - no landmark). During test, participants were instructed to look the Wi-Fi signal outside of the arena, to assess if the landmark impaired or not its global representation. In Experiment 1, participants were released from a fixed location over 15 training trials, in Experiment 2 participants were released from multiple locations, and in Experiment 3 participants were released from a fixed arm but received 3 trials only. Overshadowing was found under strong contiguity (Proximal Group), but only when participants were consistently released from the same location and received extended training (Experiment 1), and no other cue competition effects were found across experiments. These results add further support to the increasing literature that shows strong contiguity is a key determinant of overshadowing in human spatial navigation, and we characterise the conditions under which this happens

    Data corresponding to the work: "TRAIL part 3: The stable orientation of aggregate ice particles in free-fall"

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    This data set corresponds to the work entitled "TRAIL part 3: The stable orientation of aggregate ice particles in free-fall" and contains files regarding the shape of particles studied and the orientation adopted in free-fall

    Effect of popping water content and amylose/amylopectin ratio on the physical properties of expanded starch products with different shear histories - data

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    Data collected for and presented in the research paper titled "Effect of popping water content and amylose/amylopectin ratio on the physical properties of expanded starch products with different shear histories"

    Order, disorder, and metalation of tetraphenylporphyrin (2H-TPP) on Au(111)

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    A thermally induced order–disorder transition of tetraphenylporphyrin (2H-TPP) on Au(111) is characterised by scanning probe microscopy and X-ray photoelectron spectroscopy-based techniques. We observed that a transition from an ordered close-packed phase to a disordered diffuse phase is correlated with an on-surface cyclodehydrogenation reaction, and that additional heating of this diffuse phase gives rise to a single distinct nitrogen environment indicative of the formation of a Au–TPP species

    Contiguity and overshadowing interactions in the rapid-streaming procedure

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    Previous research has reported that temporal contiguity is a critical factor determining the direction of cue-interactions: strong contiguity leads to competition (e.g., overshadowing), but weak contiguity leads to no-interaction and sometimes leads to facilitation (e.g., potentiation). In these experiments, we adapted the streamed-trial procedure to further explore this interaction in a preparation in which the presentation of trials occurred in rapid streams. In five experiments we assessed whether contiguity and overshadowing effects are reliably observed in this procedure, and whether there was an interaction between them. Participants had to learn the relationship between visual cues and an outcome. Using within-subject designs, participants experienced independent series of streams in which cues and outcomes were trained either with delay or trace conditioning, and these target cues were presented either alone or with another cue. Across experiments, we consistently observed overshadowing (Experiments 1, 2, 5) and contiguity effects (Experiments 2, 3, 4, 5). Despite the consistency of both effects, we did not find that weakening temporal contiguity abolished competition between cues, although the magnitude of overshadowing was weaker with trace conditioning. This suggests that in the streamed-trial procedure contiguity modulates competition to some extent, but perhaps the parameters and conditions used in here were not adequate to produce a shift from competition to facilitation. Overall, these results suggest that the extent to which contiguity determines cue-interactions depends on multiple variables that we address in the General Discussion

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