5,416 research outputs found
CONFRONTING SAME-SEX, STUDENT-TO-STUDENT SEXUAL HARASSMENT: RECOMMENDATIONS FOR EDUCATORS AND POLICY MAKERS
Student-on-student sexual harassment has been the subject of significant scholarly commentary and numerous court battles. In light of the United States Supreme Court\u27s decision in Davis v. Monroe County Board of Education, which held that in certain cases students have a cause of action under Title IX against schools for peer sexual harassment, many schools have been advised to consider responses to and ways to prevent student-on-student sexual harassment. When considering corrective and preventative approaches to peer sexual harassment in the schools, educators and policy makers should strongly consider addressing same-sex harassment. Prior to its decision in Davis, a unanimous United States Supreme Court, in Oncale v. Sundowner Offshore Services, Inc., held that same-sex harassment in the workplace may be actionable under Title VII. Given the judiciary\u27s frequent reliance on Title VII standards in Title IX cases, at least when considering what type of conduct is actionable, Oncale, when read together with Davis, signals the opening of a new avenue for students seeking relief for same-sex peer harassment. This article hopes to offer some insight for educators and policy makers developing responses to same-sex peer harassment. First, it more fully explains the Supreme Court\u27s decisions in Davis and Oncale and their importance to educators. Second, it briefly summarizes recent scholarship concerning the effects of a homophobic school climate on students. Finally, it offers some basic guidance for practice and policy formation
Functionally terminated liquid nitroso fluorocarbon terpolymers
Properties of polymer for conformal coating for electronic circuitry are described. Nitroso fluorocarbon polymers were selected for application. Chemical reactions for production of polymers are discussed. Technique allows regulation of crosslink densities, molecular weight, and viscosity
The Search for a Realistic String Model at LHC
We survey the low-energy supersymmetry phenomenology of a three-family
Pati-Salam model constructed from intersecting D6-branes in Type IIA string
theory on the T^6/(Z_2 x Z_2) orientifold which possesses many of the
phenomenological properties desired in string model-building. In the model,
there is no exotic matter in the low-energy spectrum, the correct mass
hierarchies for quarks and leptons may be obtained, and the gauge couplings are
automatically unified at the string scale. We calculate the supersymmetry
breaking soft terms and the corresponding low-energy supersymmetry particle
spectra for the model. We find the WMAP constrained dark matter density can be
generated in this model in the stau-neutralino and chargino-neutralino
coannihilation regions, with expected final states at LHC consisting of low
energy leptons and O(GeV) neutrinos. Moreover, we expect final states in the
supercritical string cosmology (SSC) scenario to comprise high energy leptons
and O(GeV) neutrinos.Comment: 35 pages, 4 figures, accepted for publication in PR
Mine water outbreak and stability risks : examples and challenges from England and Wales
Abstract Although their frequency of occurrence is rare, the sudden outbreak of mine water from abandoned mines, or collapse of waste rock stores can be environmentally significant and represent significant postclosure legacies. This paper reports on a national survey of abandoned non-coal mine sites where concerns over mine water outbreak or stability are apparent across England and Wales. A range of respondents across environmental regulators and local authorities were consulted to populate a geodatabase. Outbreak risk was highlighted as a documented or suspected concern at 19 mine sites. Typical issues were related to adit blockages and associated perched mine water alongside issues of sudden ingress of surface waters into mines under high flow conditions. The majority of the responses concerning stability issues (72 sites in total) were related to fluvial erosion of riparian waste rock heaps. While successful management of such issues is highlighted in some cases, these are generally isolated examples. In both cases, the fact that stability or outbreak issues are often caused or exacerbated by extreme rainfall events highlights a potential future management issue with the predicted effects of climate change in north west Europe
Proton Stability and Dark Matter in a Realistic String MSSM
We demonstrate the existence of an extra nonanomalous U(1) gauge symmetry in
a three-generation Pati-Salam model constructed with intersecting D6-branes in
Type IIA string theory on a T^6/(Z_2 \times Z_2) orientifold. This extra U(1)
forbids all dimension-4, 5, and 6 operators which mediate proton decay in the
MSSM. Moreover, this results in the effective promotion of baryon and lepton
number to local gauge symmetries, which can potentially result in leptophobic
and leptophilic bosons observable at the LHC. Furthermore, it is not
necessary to invoke R-parity to forbid the dimension-4 operators which allow
rapid proton decay. However, R-parity may arise naturally from a spontaneously
broken U(1)_{B-L}. Assuming the presence of R-parity, we then study the direct
detection cross-sections for neutralino dark matter, including the latest
constraints from the XENON100 experiment. We find that these limits are now
within required range necessary to begin testing the model.Comment: Expanded discussion of Z' boson phenomenology. Accepted for
publication to Physical Review D. arXiv admin note: text overlap with
arXiv:1103.603
Exact 1-D Model for Coherent Synchrotron Radiation with Shielding and Bunch Compression
Coherent Synchrotron Radiation has been studied effectively using a
1-dimensional model for the charge distribution in the realm of small angle
approximations and high energies. Here we use Jefimenko's form of Maxwell's
equations, without such approximations, to calculate the exact wake-fields due
to this effect in multiple bends and drifts. It has been shown before that the
influence of a drift can propagate well into a subsequent bend. We show, for
reasonable parameters, that the influence of a previous bend can also propagate
well into a subsequent bend, and that this is especially important at the
beginning of a bend. Shielding by conducting parallel plates is simulated using
the image charge method. We extend the formalism to situations with compressing
and decompressing distributions, and conclude that simpler approximations to
bunch compression usually overestimates the effect. Additionally, an exact
formula for the coherent power radiated by a Gaussian bunch is derived by
considering the coherent synchrotron radiation spectrum, and is used to check
the accuracy of wake-field calculations
Representation of Dormant and Active Microbial Dynamics for Ecosystem Modeling
Dormancy is an essential strategy for microorganisms to cope with
environmental stress. However, global ecosystem models typically ignore
microbial dormancy, resulting in major model uncertainties. To facilitate the
consideration of dormancy in these large-scale models, we propose a new
microbial physiology component that works for a wide range of substrate
availabilities. This new model is based on microbial physiological states and
is majorly parameterized with the maximum specific growth and maintenance rates
of active microbes and the ratio of dormant to active maintenance rates. A
major improvement of our model over extant models is that it can explain the
low active microbial fractions commonly observed in undisturbed soils. Our new
model shows that the exponentially-increasing respiration from
substrate-induced respiration experiments can only be used to determine the
maximum specific growth rate and initial active microbial biomass, while the
respiration data representing both exponentially-increasing and
non-exponentially-increasing phases can robustly determine a range of key
parameters including the initial total live biomass, initial active fraction,
the maximum specific growth and maintenance rates, and the half-saturation
constant. Our new model can be incorporated into existing ecosystem models to
account for dormancy in microbially-mediated processes and to provide improved
estimates of microbial activities.Comment: 38 pages, 2 Tables, 4 Figure
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Memory in Autistic Spectrum Disorder
Behavioral evidence concerning memory in high-functioning forms of autism (HFA) and in moderately low-functioning autism (M-LFA) is reviewed and compared. Findings on M-LFA are sparse. However, it is provisionally concluded that memory profiles in HFA and M-LFA (relative to ability-matched controls) are similar, but that declarative memory impairments are more extensive in M-LFA than in HFA. Specifically, both groups have diminished memory for emotion- or person-related stimuli. Regarding memory for non-social stimuli, both groups probably have mental-age appropriate nondeclarative memory; and within declarative memory, both groups have mental-age appropriate immediate free recall of within-span or supra-span lists of unrelated items, as well as cued recall and paired associate learning. By contrast, recognition is largely unimpaired in HFA but moderately impaired in M-LFA; and free recall of meaningful or structured stimuli is moderately impaired in HFA but more severely impaired in M-LFA. Theoretical explanations of data on declarative memory in HFA identify problems in the integrative processing, or the consolidation and storage, of complex stimuli; or a specific problem of recollection. Proposed neural substrates include the following: disconnectivity of primary sensory and association areas; dysfunctions of medial prefrontal cortex, hippocampus or posterior parietal lobe; or combinations of these associated with neural disconnectivity. Hypothetically, perirhinal dysfunction might explain the more extensive declarative memory impairments in M-LFA. Foreseeable consequences of uneven memory abilities in HFA and M-LFA are outlined, including possible effects on language and learning in M-LFA. Finally, priorities for future research are identified, highlighting the urgent need for research on memory in lower-functioning individuals
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