5,202 research outputs found
Event-by-Event Jet Quenching
High momentum jets and hadrons can be used as probes for the quark gluon
plasma (QGP) formed in nuclear collisions at high energies. We investigate the
influence of fluctuations in the fireball on jet quenching observables by
comparing propagation of light quarks and gluons through averaged, smooth QGP
fireballs with event-by-event jet quenching using realistic inhomogeneous
fireballs. We find that the transverse momentum and impact parameter dependence
of the nuclear modification factor R_AA can be fit well in an event-by-event
quenching scenario within experimental errors. However the transport
coefficient qhat extracted from fits to the measured nuclear modification
factor R_AA in averaged fireballs underestimates the value from event-by-event
calculations by up to 50%. On the other hand, after adjusting qhat to fit R_AA
in the event-by-event analysis we find residual deviations in the azimuthal
asymmetry v_2 and in two-particle correlations, that provide a possible faint
signature for a spatial tomography of the fireball.Comment: 8 pages, 5 figures; v2: new figure added, small changes and fixes,
this version published in Phys. Lett.
Rearrangement collisions between gold clusters
Collision processes between two gold clusters are investigated using
classical molecular dynamics in combination with embedded atom (EA) potentials,
after checking the reliability of EA results by contrasting them with first
principles calculations. The Au projectiles considered are both single atoms
(N=1) and clusters of N=2, 12, 13 and 14 atoms. The targets contain N= 12, 13
and 14 gold atoms. The initial projectile energy E is in the range 0 < E < 1.5
eV/atom. The results of the collision processes are described and analyzed in
detail.Comment: LATeX file, 8 figures, uses svjour.cl
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Your Abjection is in Another Castle: Julia Kristeva, Gamer Theory, and Identities-in-Différance
Typified rhetorical situations are often a result of normalized ideologies within cultures; however, they also have the capability to produce new ideology. Within these discursive sites, identities are constructed among these normalized social acts. More importantly, these identities are constructed across many layers, not limited to one social act, but many that overlap and influence each other. In this paper, I focus on the identities that are constructed in marginalized spaces within sites of interacting discourse. Focusing on the rhetoric of abjection posited by Julia Kristeva, along with McKenzie Wark’s exploration of gamespace, a liminal theoretical space that encompasses the sites of analysis and ideology formation from the perspective of gamers, I analyze disruptions of normalized social practices in the gaming genre in order to implement the use of abjection as a method of understanding how sites of difference produce meaning for minoritarian subjects
Beneficial True Bugs: Minute Pirate Bugs
This fact sheet describes beneficial true bugs: minute pirate bugs. It includes their life cycle and tips for promoting beneficial insects such as conservation and enhancement, predator release, and the predator release process
Using a Sustainable Livelihoods Approach to Assessing the Impact of ICTs in Development
This paper describes the sustainable livelihoods framework as a useful tool in assessing the contribution of ICTs to development projects. Assessing the role of ICTs in development can be difficult because they are so multifaceted, and because the effect of ICT use is often indirect. This paper argues that applying the sustainable livelihood frameworks in assessment can help to broaden their scope in a manageable way and prove more analytically rigorous than other available methods. The example of an impact assessment of a Colombian telecentre is used to demonstrate how such an approach can be applied
Common Crane Fly in Turf
Crane flies belong to one of the most specious families of flies. The adult flies, also known as “mosquito hawks”, are not giant mosquitoes and do not bite, and though the name suggests it, they do not feed on mosquitoes. In general, the larvae are associated with aquatic and semi-aquatic habitats. The majority of crane flies are not pests
Comparing the validity of two sets of evaluation principles : adding value to both
This chapter provides a comparative analysis between the evidence-based principles for collaborative approaches to evaluation (CAE) and those associated with the DECI (Developing Evaluation Capacity in Information Society Research)- hybrid approach. The CAE principles were derived from a research project that gathered insights from 320 evaluators who practice CAE. The DECI principles emerged from an action and implementation project within which a number of partner projects were mentored in utilization-focused evaluation (UFE) combined with research communication. The comparison is meant to assess the extent to which there is convergent validity and to explore the complementarity of the principle sets
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