10,514 research outputs found
Impure Thoughts on Inelastic Dark Matter
The inelastic dark matter scenario was proposed to reconcile the DAMA annual
modulation with null results from other experiments. In this scenario, WIMPs
scatter into an excited state, split from the ground state by an energy delta
comparable to the available kinetic energy of a Galactic WIMP. We note that for
large splittings delta, the dominant scattering at DAMA can occur off of
thallium nuclei, with A~205, which are present as a dopant at the 10^-3 level
in NaI(Tl) crystals. For a WIMP mass m~100GeV and delta~200keV, we find a
region in delta-m-parameter space which is consistent with all experiments.
These parameters in particular can be probed in experiments with thallium in
their targets, such as KIMS, but are inaccessible to lighter target
experiments. Depending on the tail of the WIMP velocity distribution, a highly
modulated signal may or may not appear at CRESST-II.Comment: 3 pages, 1 figure, accepted for publication in Physical Review
Letter
JASMYN and the Need for LGBTQ+ Specific Organizations in Jacksonville, Florida
Nonprofit organizations receive a substantial amount of their funding from the federal government. In 2017, the current administration proposed cuts in areas of the federal budget that would negatively affect nonprofits and without this essential funding, such organizations may be unable to provide vital resources and services. LGBTQ+ specific organizations in northeast Florida, such as JASMYN, play a role fulfilling the health and social needs of LGBTQ+ youth that would otherwise not be addressed by non-LGBTQ+ specific organizations
Conflict in the Statutory Elicitation of Aboriginal Culture in Australia
In order for Aboriginal rights and interests to be recognised under the Native Title Act (1993), such rights and interests must arise from laws and customs that can be shown to have continuity with the particular set of laws and customs that existed at the time of sovereignty, or, at least, at the time of first European contact. This interpretation of continuity has been applied in Australian native title cases since the High Courtâs Yorta Yorta decision (Yorta Yorta v the State of Victoria [2002] HCA 58). Yet todayâs Aboriginal native title claim groups are also required to participate in other statutory ventures outside of the native title domain. For example, âtribalâ representatives in north Queensland are obliged to represent their interests on the Wet Tropics Management Authority, and the Great Barrier Reef Marine Park Authority. In native title terms, however, the activity and time spent participating in these ventures do not âcountâ as instantiations of traditionally based rights and interests. Furthermore, the powers and rights granted to Aboriginal groups under these statutory ventures are often in conflict with the strictures of current native title interpretations of âtraditional law and custom and rights and interestsâ. The effect is to elicit versions of Aboriginal action that may contradict each other legally. In this paper, I discuss some examples of these institutional conflicts engendered by the statutory actions of state and federal government, and comment on the implications for the contemporary Aboriginal articulations of identity and tradition
An examination of box office relationship quality and relationship selling in Division I college athletics.
College athletics departments have experienced unprecedented growth. However, expenses have risen even faster (Fulks, 2016), and university athletics departments have relied on increased subsidies from host institutions and donations to make ends meet (Fulks, 2016). The root cause behind much of the revenue increases have been credited to large multimedia and broadcast contracts, which guarantee substantial income for decade-long terms (Sherman, 2016). Such agreements leave little room for individual growth, leaving ticket sales as one of the few controllable revenues to which a school could manipulate their own bottom line and increase profitability. Further investigation into box office sales trends are concerning. Attendance has flatlined or decreased in many Division I conferences (Kahn, 2018), and literature has highlighted inefficient box office operations as a possible cause (Bouchet et al., 2011). Research has suggested improving relationship quality between the customer and the box office may yield positive outcomes (Smith & Roy, 2011). However, the degree to which relationship quality effects purchase behaviors is still unknown. Furthermore, business literature has highlighted the importance of relationship selling behaviors in services industries (Crosby et al., 1990; Avila & Inks, 2017) however relationship selling effectiveness has not yet been examined in a sport context. Thus, the purpose of this study was to measure relationship quality and relational selling from the university box office and determine the impact of relationship quality and relationship selling techniques on consumer behavior in Division I college football. The current study utilized a sample of 520 participants representing over 90 Division I FBS schools. Data were collected using Amazon Mechanical Turk and analyzed using a series of hierarchical linear regressions. Relationship quality was measured using the Sport Consumer Team Relationship Quality Scale developed by Kim et al., (2011) while relationship selling was measures using a modified version of Crosby et al.âs (1990) instrument, adapted to fit the sport context. Purchase behaviors of renewal sales, add-on sales, upselling and cross-selling were regressed against the variables. Results showed commitment and customer disclosure as the most predictive variables for football related behavior, while cross selling (to another sport) was predicted by trust, reciprocity, agent disclosure, and cooperative intentions. The findings suggest commitment resembles team identification in its ability to predict consumer behavior, and customer disclosure as an important variable in sales exchanges. Sales training should emphasize the fanâs commitment to increase the likelihood of ânewâ sales (add-on, upsell), and sales representatives should take care to find out as much about the customer as possible. Additionally, the findings suggest cross-sell pitches should vary from football-specific sales, as the consumers behave differently to different aspects of relationship-based sales pitches in these situations. By leveraging findings regarding increasing relationship quality and relationship selling, athletics departments may be able to increase ticket sales and become more self-sufficient
Transient behavior of surface plasmon polaritons scattered at a subwavelength groove
We present a numerical study and analytical model of the optical near-field
diffracted in the vicinity of subwavelength grooves milled in silver surfaces.
The Green's tensor approach permits computation of the phase and amplitude
dependence of the diffracted wave as a function of the groove geometry. It is
shown that the field diffracted along the interface by the groove is equivalent
to replacing the groove by an oscillating dipolar line source. An analytic
expression is derived from the Green's function formalism, that reproduces well
the asymptotic surface plasmon polariton (SPP) wave as well as the transient
surface wave in the near-zone close to the groove. The agreement between this
model and the full simulation is very good, showing that the transient
"near-zone" regime does not depend on the precise shape of the groove. Finally,
it is shown that a composite diffractive evanescent wave model that includes
the asymptotic SPP can describe the wavelength evolution in this transient
near-zone. Such a semi-analytical model may be useful for the design and
optimization of more elaborate photonic circuits whose behavior in large part
will be controlled by surface waves.Comment: 12 pages, 10 figure
High Energy Positrons From Annihilating Dark Matter
Recent preliminary results from the PAMELA experiment indicate the presence
of an excess of cosmic ray positrons above 10 GeV. In this letter, we consider
possibility that this signal is the result of dark matter annihilations taking
place in the halo of the Milky Way. Rather than focusing on a specific particle
physics model, we take a phenomenological approach and consider a variety of
masses and two-body annihilation modes, including W+W-, ZZ, b bbar, tau+ tau-,
mu+ mu-, and e+e. We also consider a range of diffusion parameters consistent
with current cosmic ray data. We find that a significant upturn in the positron
fraction above 10 GeV is compatible with a wide range of dark matter
annihilation modes, although very large annihilation cross sections and/or
boost factors arising from inhomogeneities in the local dark matter
distribution are required to produce the observed intensity of the signal. We
comment on constraints from gamma rays, synchrotron emission, and cosmic ray
antiproton measurements.Comment: 4 pages, 1 figur
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