7,701 research outputs found
Strange and Multi-Strange Particle Production in ALICE
The production of strange and multi-strange hadrons in proton-proton (pp) and
lead-lead (Pb-Pb) collisions is studied with the ALICE experiment at the CERN
LHC. These particles are reconstructed via their weak decay topologies,
exploiting the tracking and particle identification capabilities of ALICE.
Measurements of central rapidity yields of , and
baryons, their antiparticles and mesons are
presented as a function of transverse momentum for Pb-Pb collisions at
TeV. They are compared to those observed in pp collisions
as well as to results from lower energy nucleus-nucleus measurements.Comment: 4 pages, 3 figures, Hot Quarks 2012 Proceeding
Feature space analysis for human activity recognition in smart environments
Activity classification from smart environment data is typically done employing ad hoc solutions customised to the particular dataset at hand. In this work we introduce a general purpose collection of features for recognising human activities across datasets of different type, size and nature. The first experimental test of our feature collection achieves state of the art results on well known datasets, and we provide a feature importance analysis in order to compare the potential relevance of features for activity classification in different datasets
Recovering pyramid WS gain in non-common path aberration correction mode via deformable lens
It is by now well known that pyramid based wavefront sensors, once in closed
loop, have the capability to improve more and more the gain as the reference
natural star image size is getting smaller on the pyramid pin. Especially in
extreme adaptive optics applications, in order to correct the non-common path
aberrations between the scientific and sensing channel, it is common use to
inject a certain amount of offset wavefront deformation into the DM(s),
departing at the same time the pyramid from the optimal working condition. In
this paper we elaborate on the possibility to correct the low order non-common
path aberrations at the pyramid wavefront sensor level by means of an adaptive
refractive lens placed on the optical path before the pyramid itself, allowing
the mitigation of the gain loss
Unsupervised grounding of textual descriptions of object features and actions in video
We propose a novel method for learning visual concepts and their correspondence to the words of a natural language. The concepts and correspondences are jointly inferred from video clips depicting simple actions involving multiple objects, together with corresponding natural language commands that would elicit these actions. Individual objects are first detected, together with quantitative measurements of their colour, shape, location and motion. Visual concepts emerge from the co-occurrence of regions within a measurement space and words of the language. The method is evaluated on a set of videos generated automatically using computer graphics from a database of initial and goal configurations of objects. Each video is annotated with multiple commands in natural language obtained from human annotators using crowd sourcing
Multi-strange particle measurements in 7 TeV proton-proton and 2.76 TeV PbPb collisions with the ALICE experiment at the LHC
The production of charged multi-strange particles is studied with the ALICE
experiment at the CERN LHC. Measurements of the central rapidity yields of
and baryons, as well as their antiparticles, are presented
as a function of transverse momentum () for inelastic pp
collisions at TeV and compared to existing measurements performed
at the same and/or at lower energies. The results are also compared to
predictions from two different tunes of the PYTHIA event generator. We find
that data significantly exceed the production rates from those models. Finally,
we present the status of the multi-strange particle production studies in Pb-Pb
at TeV performed as a function of collision centrality.Comment: 4 pages, 3 figures. Submitted to the Proceedings of QM201
Smart-traps combined with molecular on-site detection to monitor Monochamus spp. and associated pine wood nematode
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