10,698 research outputs found
Coworker Distributive Fairness Judgments of the Workplace Accomodations of Employees with Disabilities
[Excerpt] I present a model of when and how coworkers judge the distributive fairness of workplace accommodations of employees with disabilities. Fairness judgments are made when accommodations are salient and relevant to coworkers. I thus present factors influencing the salience and relevance of accommodation. I also argue that fairness judgments are based on equity and need rules and therefore explore factors influencing equity comparisons and perceived warrantedness. Finally, I suggest directions and ideas for future research
Strangeness production in p-Pb and Pb-Pb collisions with ALICE at LHC
The main goal of the ALICE experiment is to study the properties of the hot
and dense medium created in ultra-relativistic heavy-ion collisions. The
measurement of the (multi-)strange particles is an important tool to understand
particle production mechanisms and the dynamics of the quark-gluon plasma
(QGP). We report on the production of K,
(), () and
() in proton-lead (p-Pb) collisions at
= 5.02 TeV and lead-lead (Pb-Pb) collisions at
= 2.76 TeV measured by ALICE at the LHC. The comparison of
the hyperon-to-pion ratios in the two colliding systems may provide insight
into strangeness production mechanisms, while the comparison of the nuclear
modification factors helps to determine the contribution of initial state
effects and the suppression from strange quark energy loss in nuclear matter.Comment: 4 pages, 3 figures, Proceedings of SQM'16 conference, 27 June - 1
July 201
Multi-strange baryon production in Pb-Pb and pp collisions at = 2.76 TeV with the ALICE experiment at the LHC
The production of and baryons and their anti-particles
in Pb-Pb and pp collisions at = 2.76 TeV has been measured by
the ALICE collaboration. The transverse momentum spectra at mid-rapidity (|y| <
0.5) in pp and Pb-Pb collisions for five centrality intervals have been
compared with model predictions. Hyperon yields and spectra in Pb-Pb
collisions, normalized to the corresponding measurements in pp at the same
centre-of-mass energy, allow the study of the strangeness enhancement and the
nuclear modification factor as a function of the transverse momentum ()
and collision centrality.Comment: 4 pages, 3 figures. Proceedings of the Strangeness in Quark Matter
Conference (SQM 2013), 22nd - 27th July 2013, published by the Open Access
Journal of Physics: Conference Series (JPCS), in the IOP conference serie
The Impact of Subordinate Disability on Leader-Member Exchange Relationships
[Excerpt] An organizational simulation (n = 85) and a field study (41 supervisors and 220 subordinates) were conducted to investigate the impact of subordinates\u27 disability status on leader-member exchange (LMX) relationships. Both studies investigated how subordinate disability and ingratiation were related to LMX quality. As hypothesized, the interaction of disability and ingratiation affected LMX. Ingratiation had a stronger relationship to supervisors\u27 LMX ratings when a subordinate had a disability. Implications of the results are discussed and suggestions for future research presented
Gravity-Induced Interference and Continuous Quantum Measurements
Gravity-induced quantum interference is a remarkable effect that has already
been confirmed experimentally, and it is a phenomenon in which quantum
mechanics and gravity play simultaneously an important role. Additionally, a
generalized version of this interference experiment could offer the possibility
to confront against measurement outputs one of the formalisms that claim to
give an explanation to the so called quantum measurement problem, namely the
restricted path integral formalism. In this work we will analyze a possible
extension of Colella, Overhauser, and Werner experiment and find that in the
context of the restricted path integral formalism we obtain new interference
terms that could be measured in an extended version of this experimental
construction. These new terms not only show, as in the first experiment, that
at the quantum level gravity is not a purely geometric effect, it still depends
on mass, but also show that interference does depend on some parameters that
appear in the restricted path integral formalism, thus offering the possibility
to have a testing framework for its theoretical predictions.Comment: Accepted for publication in Physics Letters A, 12 pages, no figure
The Convergence of Particle-in-Cell Schemes for Cosmological Dark Matter Simulations
Particle methods are a ubiquitous tool for solving the Vlasov-Poisson
equation in comoving coordinates, which is used to model the gravitational
evolution of dark matter in an expanding universe. However, these methods are
known to produce poor results on idealized test problems, particularly at late
times, after the particle trajectories have crossed. To investigate this, we
have performed a series of one- and two-dimensional "Zel'dovich Pancake"
calculations using the popular Particle-in-Cell (PIC) method. We find that PIC
can indeed converge on these problems provided the following modifications are
made. The first modification is to regularize the singular initial distribution
function by introducing a small but finite artificial velocity dispersion. This
process is analogous to artificial viscosity in compressible gas dynamics, and,
as with artificial viscosity, the amount of regularization can be tailored so
that its effect outside of a well-defined region - in this case, the
high-density caustics - is small. The second modification is the introduction
of a particle remapping procedure that periodically re-expresses the dark
matter distribution function using a new set of particles. We describe a
remapping algorithm that is third-order accurate and adaptive in phase space.
This procedure prevents the accumulation of numerical errors in integrating the
particle trajectories from growing large enough to significantly degrade the
solution. Once both of these changes are made, PIC converges at second order on
the Zel'dovich Pancake problem, even at late times, after many caustics have
formed. Furthermore, the resulting scheme does not suffer from the unphysical,
small-scale "clumping" phenomenon known to occur on the Pancake problem when
the perturbation wave vector is not aligned with one of the Cartesian
coordinate axes.Comment: 29 pages, 29 figures. Accepted for publication in ApJ. The revised
version includes a discussion of energy conservation in the remapping
procedure, as well as some interpretive differences in the Conclusions made
in response to the referee report. Results themselves are unchange
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