2,449 research outputs found
Masculinity in Pulitzer Prize-winning plays, 1982--2002: A content analysis study.
This study examines masculinity in Pulitzer Prize-Winning Plays from 1982--2002. Masculinity has been under intense scrutiny and criticism in the media in the past twenty years and male images have changed during this period of time. Traditional male roles have been criticized and new male ideals have been presented to counter these images from the past. This research project seeks to examine how Pulitzer Prize winners in Drama have presented leading male roles from 1982--2002. Particular elements under consideration are: age, race, economic status, marital status, and other areas. The primary area of analysis is through masculine archetypes---King, Warrior, Magician, and Lover. Through these archetypes, concepts of masculinity are studied and conclusions drawn to determine how men have been presented in these Pulitzer Prize-winning plays
A vision of leadership for secondary school : a reflective essay
Leadership requires a vision. A clear picture of what you want to accomplish. It\u27s teaching those around you how they can better themselves as well as the people they are working with. It\u27s developing, organizing, and monitoring a plan so the vision can be carried out. It\u27s knowing that you cannot reach the vision alone and drawing from the people around you. Using all the resources your school and community have to offer. Leadership is modeling desired behaviors and showing others you care. Leadership is making tough decisions , and leading change when needed. Leadership is not what you think, but it is what you do
Particle transport and heating in the microturbulent precursor of relativistic shocks
Collisionless relativistic shocks have been the focus of intense theoretical
and numerical investigations in recent years. The acceleration of particles,
the generation of electromagnetic microturbulence and the building up of a
shock front are three interrelated essential ingredients of a relativistic
collisionless shock wave. In this paper we investigate two issues of importance
in this context: (1) the transport of suprathermal particles in the excited
microturbulence upstream of the shock and its consequences regarding particle
acceleration; (2) the preheating of incoming background electrons as they cross
the shock precursor and experience relativistic oscillations in the
microturbulent electric fields. We place emphasis on the importance of the
motion of the electromagnetic disturbances relatively to the background plasma
and to the shock front. This investigation is carried out for the two major
instabilities involved in the precursor of relativistic shocks, the
filamentation instability and the oblique two stream instability. Finally, we
use our results to discuss the maximal acceleration at the external shock of a
gamma-ray burst; we find in particular a maximal synchrotron photon energy of
the order of a few GeV.Comment: 14 pages, 6 figures. Revised versio
Nucleosome repositioning via loop formation
Active (catalysed) and passive (intrinsic) nucleosome repositioning is known
to be a crucial event during the transcriptional activation of certain
eucaryotic genes. Here we consider theoretically the intrinsic mechanism and
study in detail the energetics and dynamics of DNA-loop-mediated nucleosome
repositioning, as previously proposed by Schiessel et al. (H. Schiessel, J.
Widom, R. F. Bruinsma, and W. M. Gelbart. 2001. {\it Phys. Rev. Lett.}
86:4414-4417). The surprising outcome of the present study is the inherent
nonlocality of nucleosome motion within this model -- being a direct physical
consequence of the loop mechanism. On long enough DNA templates the longer
jumps dominate over the previously predicted local motion, a fact that
contrasts simple diffusive mechanisms considered before. The possible
experimental outcome resulting from the considered mechanism is predicted,
discussed and compared to existing experimental findings
Laser-Induced Electron Emission from Au Nanowires: A Probe for Orthogonal Polarizations
Photoelectron field emission, induced by femtosecond laser pulses focused on metallic nanotips, provides spatially coherent and temporally short electron pulses. The properties of the photoelectron yield give insight into both the material properties of the nanostructure and the exciting laser focus. Ultralong nanoribbons, grown as a single crystal attached to a metallic taper, are sources of electron field emission that have not yet been characterized. In this report, photoemission from gold nanoribbon samples is studied and compared to emission from tungsten and gold tips. We observe that the emission from sharp tips generally depends on one transverse component of the exciting laser field, while the emission of a blunted nanoribbon is found to be sensitive to both components. We propose that this property makes photoemission from nanoribbons a candidate for position-sensitive detection of the longitudinal field component in a tightly focused beam
Biomass offsets little or none of permafrost carbon release from soils, streams, and wildfire: an expert assessment
As the permafrost region warms, its large organic carbon pool will be increasingly vulnerable to decomposition, combustion, and hydrologic export. Models predict that some portion of this release will be offset by increased production of Arctic and boreal biomass; however, the lack of robust estimates of net carbon balance increases the risk of further overshooting international emissions targets. Precise empirical or model-based assessments of the critical factors driving carbon balance are unlikely in the near future, so to address this gap, we present estimates from 98 permafrost-region experts of the response of biomass, wildfire, and hydrologic carbon flux to climate change. Results suggest that contrary to model projections, total permafrost-region biomass could decrease due to water stress and disturbance, factors that are not adequately incorporated in current models. Assessments indicate that end-of-the-century organic carbon release from Arctic rivers and collapsing coastlines could increase by 75% while carbon loss via burning could increase four-fold. Experts identified water balance, shifts in vegetation community, and permafrost degradation as the key sources of uncertainty in predicting future system response. In combination with previous findings, results suggest the permafrost region will become a carbon source to the atmosphere by 2100 regardless of warming scenario but that 65%â85% of permafrost carbon release can still be avoided if human emissions are actively reduced
Kinetic Theory of Radiation in Nonequilibrium Relativistic Plasmas
Many-particle QED is applied to kinetic theory of radiative processes in
many- component plasmas with relativistic electrons and nonrelativistic heavy
particles. Within the framework of nonequilibrium Green's function technique,
transport and mass-shell equations for fluctuations of the electromagnetic
field are obtained. We show that the transverse field correlation functions can
be decomposed into sharply peaked (non-Lorentzian) parts that describe resonant
(propagating) photons and off-shell parts corresponding to virtual photons in
plasmas. Analogous decomposi- tions are found for the longitudinal field
correlation functions and the correlation functions of relativistic electrons.
As a novel result a kinetic equation for the reso- nant photons with a finite
spectral width is derived. The off-shell parts of the particle and field
correlation functions are shown to be essential to calculate the local ra-
diating power in relativistic plasmas and recover the results of vacuum QED.
The influence of plasma effects and collisional broadening of the relativistic
quasiparticle spectral function on radiative processes is discussed.Comment: 63 pages, 11 figure
Preclinical evaluation of the antitumor activity of bortezomib in combination with vitamin C or with epigallocatechin gallate, a component of green tea
DBI Inflation in the Tip Region of a Warped Throat
Previous work on DBI inflation, which achieves inflation through the motion
of a brane as it moves through a warped throat compactification, has
focused on the region far from the tip of the throat. Since reheating and other
observable effects typically occur near the tip, a more detailed study of this
region is required. To investigate these effects we consider a generalized warp
throat where the warp factor becomes nearly constant near the tip. We find that
it is possible to obtain 60 or more e-folds in the constant region, however
large non-gaussianities are typically produced due to the small sound speed of
fluctuations. For a particular well-studied throat, the Klebanov-Strassler
solution, we find that inflation near the tip may be generic and it is
difficult to satisfy current bounds on non-gaussianity, but other throat
solutions may evade these difficulties.Comment: 26 pages, 1 figure. v1. references added, typos corrected v2.
clarifications mad
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