18 research outputs found
Looking ahead: anticipatory gaze and motor ability in infancy
No full textThe present study asks when infants are able to selectively anticipate the goals of observed actions, and how this ability relates to infants' own abilities to produce those specific actions. Using eye-tracking technology to measure on-line anticipation, 6-, 8- and 10-month-old infants and a control group of adults were tested while observing an adult reach with a whole hand grasp, a precision grasp or a closed fist towards one of two different sized objects. The same infants were also given a comparable action production task. All infants showed proactive gaze to the whole hand grasps, with increased degrees of proactivity in the older groups. Gaze proactivity to the precision grasps, however, was present from 8 months of age. Moreover, the infants' ability in performing precision grasping strongly predicted their ability in using the actor's hand shape cues to differentially anticipate the goal of the observed action, even when age was partialled out. The results are discussed in terms of the specificity of action anticipation, and the fine-grained relationship between action production and action perception
Relation between infants' gaze proactivity and motor ability.
No full text<p>Performances in grasping and observation tasks in Small and Large conditions (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0067916#s2" target="_blank">Methods</a>) are plotted as green diamonds and blue circles, respectively. Corresponding regression lines are shown as green and blue solid lines.</p
Gaze arrival times.
No full text<p>Time of gaze arrival at the Target relative to arrival of actor's hand. Gaze arrival times are plotted as a function of Target size and hand Shape in each Age group. Actor's hand-arrival time is represented by the horizontal line at 0 ms. Negative values represents proactive eye movements. Error bars represents within-subjects standard errors. * indicates <i>p</i><.05.</p
Snapshots of stimulus videos.
No full text<p>The figure shows the hand movement kinematic for the two targets layouts (panel <b>A</b> and <b>B</b>) in each experimental condition (for each panel, from top to bottom: No Shape–Small Target, Pre-Shape–Small Target, No Shape–Large Target and Pre-Shape–Large Target). The leftmost column depicts the Fixation phase with the Target AOI (white circle) superimposed on the target object. The central columns show the actor’s hand during the Movement phase for the frames corresponding to each quartile of the movement, and the column corresponding to the 100% of the Movement phase shows the actual end of the action, i.e., the last frame of the actual video. The rightmost column depicts the Contact phase. The person depicted in this figure has given written informed consent, as outlined in the PLoS consent form, to publication of their photograph.</p
An Exploration of the Dynamics of Consensual Approaches in Biodiversity Planning for the Wider Countryside: Evaluating the Usefulness and Applicability of Actor-Network Theory
No full textThis research examines the usefulness of applying theoretical principles from the Sociology of
Translation and Actor Network Theory to the scenario of biodiversity planning in Oxfordshire
between the early nineteen nineties and 2001. It develops a model derived from a social
constructionist approach to considering Nature, and seeks to apply it to empirical data on the
development of Oxfordshire's Local Biodiversity Action Plan. The data is considered in relation
to the four poles of the model which are the 'scientific knowledge or technical' pole; the
'institutional' pole; the 'production of practices' pole and the 'nature protected' pole. The idea
that is applied is that scientific knowledge that is generated for a purpose becomes the accepted
wisdom and consequently is institutionalized. From this acceptance of the importance of
scientific or technical authority, practices will then be generated (for example, land or water
management strategies) and these then protect particular elements of nature; essentially what
society, and more specifically, the actors involved with problematising the issue deem as being
elements that are important to preserve.
Also, there is a time and space dimension built into the model since the author builds on the
ideas of actor-network theorists who argue that a network is not a flat shape but that actors may
act at a distance (e. g. global actor) but still be linked into a localized network. Similarly, actors
may be incorporated from different times but may be held into place within a given network
because their views or actions are part of a stable agreement (e. g. text/intermediary object) that
has encapsulated a number of different actors.The actor-networks presented in this thesis are
heterogeneous in nature in that they incorporate elements of nature and the human world as
different actors represent the views of others. The research explores stable and unstable
networks that are founded within consensual approaches through partnership working between
many different types of organisation
Measurement of vector-boson scattering and limits on anomalous quartic gauge couplings with the ATLAS detector
No full textSee paper for full list of authors - 49 pages in total, author list starting page 33, 13 figures, 12 tables, submitted to Physical Review D, all figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2014-05/International audienceThis paper presents the extended results of measurements of W±W±jj production and limits on anomalous quartic gauge couplings using 20.3 fb−1 of proton-proton collision data at s√=8 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with two leptons (e or μ) with the same electric charge and at least two jets are analyzed. Production cross-sections are determined in two fiducial regions, with different sensitivities to the electroweak and strong production mechanisms. An additional fiducial region, particularly sensitive to anomalous quartic gauge coupling parameters α4 and α5, is introduced, which allows more stringent limits on these parameters compared to the previous ATLAS measurement
Jet energy scale measurements and their systematic uncertainties in proton-proton collisions at TeV with the ATLAS detector
No full textSee paper for full list of authors - 51 pages in total, author list starting page 35, 15 figures, 1 table, submitted to Phys. Rev. D., all figures including auxilary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/PERF-2016-04/International audienceJet energy scale measurements and their systematic uncertainties are reported for jets measured with the ATLAS detector using proton-proton collision data with a center-of-mass energy of TeV, corresponding to an integrated luminosity of 3.2 fb collected during 2015 at the LHC. Jets are reconstructed from energy deposits forming topological clusters of calorimeter cells, using the anti- algorithm with radius parameter . Jets are calibrated with a series of simulation-based corrections and in situ techniques. In situ techniques exploit the transverse momentum balance between a jet and a reference object such as a photon, boson, or multijet system for jets with ) is derived from dijet balance measurements. For jets of GeV, the additional uncertainty for the forward jet calibration reaches its largest value of about 2% in the range and in a narrow slice of
Measurement of the top quark mass in the t(t)over-bar -> dilepton channel from root s=8TeVATLAS data
No full textThe top quark mass is measured in the t (t) over bar -> dilepton channel (lepton= e, mu) using ATLAS data recorded in the year 2012 at the LHC. The data were taken at a proton-proton centre-of-mass energy of root s = 8 TeV and correspond to an integrated luminosity of about 20.2 fb(-1). Exploiting the template method, and using the distribution of invariant masses of lepton-b-jetpairs, the top quark mass is measured to be m(top) = 172.99 +/- 0.41(stat)+/- 0.74(syst) GeV, with a total uncertainty of 0.84 GeV. Finally, acombination with previous ATLAS m(top) measurements from root s = 7 TeV data in the t (t) over bar -> dilepton and t (t) over bar -> lepton + jets channels results in m(top) = 172.84 +/- 0.34(stat)+/- 0.61(syst) GeV, with a total uncertainty of 0.70 GeV. (C) 2016 The Author. Published by Elsevier B.V
Measurements of the Total and Differential Higgs Boson Production Cross Sections Combining the H→γγ and H→ZZ∗→4ℓ Decay Channels at s√=8 TeV with the ATLAS Detector
No full text6 pages plus author list + cover page + supplemental material (26 pages total), 7 figures, 23 tables, submitted to Physical Review Letters. All figures including auxiliary figures are available at this http URL - See paper for full list of authorsInternational audienceMeasurements of the total and differential cross sections of Higgs boson production are performed using 20.3 fb−1 of pp collisions produced by the Large Hadron Collider at a center-of-mass energy of s√=8 TeV and recorded by the ATLAS detector. Cross sections are obtained from measured H→γγ and H→ZZ∗→4ℓ event yields, which are combined accounting for detector efficiencies, fiducial acceptances and branching fractions. Differential cross sections are reported as a function of Higgs boson transverse momentum, Higgs boson rapidity, number of jets in the event, and transverse momentum of the leading jet. The total production cross section is determined to be σpp→H=33.0±5.3(stat)±1.6(sys)pb. The measurements are compared to state-of-the-art predictions
Measurement of the production cross section in the + jets final state in collisions at TeV using the ATLAS detector
No full textSee paper for full list of authors - 37 pages in total, author list starts at page 21, 2 figures, 6 tables, submitted to Phys. Rev. D, all figures and tables including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-18/International audienceA measurement of the inclusive production cross section in the final state using only the hadronic decays of the lepton is presented. The measurement is performed using 20.2 fb of proton-proton collision data recorded at a center-of-mass energy of TeV with the ATLAS detector at the Large Hadron Collider. The cross section is measured via a counting experiment by imposing a set of selection criteria on the identification and kinematic variables of the reconstructed particles and jets, and on event kinematic variables and characteristics. The production cross section is measured to be pb, which is in agreement with the measurements in other final states and the theoretical predictions at this center-of-mass energy
