3,273 research outputs found
Black History Month Programs: Performance and Heritage
Implications embedded in Black History Month programs access desires for cultural recognition of African American contributions and history within the United States. Equally important at these events is the implicit furthering of knowledge and connection to the past and the sustainability of African American heritage and culture. Concepts of âhomeâ as historical, national, and individual community, infuse each performance and support and encourage connections that in turn insist on the removal of myopic considerations of cultural subjectivity and sustainability. Black History Month programs revision âhomeâ through counter-stories of Blackness in America and American-ness in Black America.Les programmes du Mois de lâhistoire des Noirs rĂ©pondent implicitement aux dĂ©sirs de reconnaissance culturelle des contributions et de lâhistoire des Afro-amĂ©ricains aux Ătats-Unis. Lors de ces Ă©vĂšnements, lâapprofondissement implicite de la connaissance, la relation au passĂ© et la durabilitĂ© de la culture et du patrimoine afro-amĂ©ricains sont tout aussi importants. Les concepts de « chez soi » en tant que communautĂ© historique, nationale et individuelle inspirent toutes les sĂ©ances et soutiennent et encouragent des connexions qui, en retour, insistent pour que lâon abandonne les considĂ©rations Ă courte vue au sujet de la subjectivitĂ© culturelle et de la durabilitĂ©. Les programmes du Mois de lâhistoire des Noirs revisitent le « chez soi » au moyen de contrerĂ©cits portant sur le fait dâĂȘtre Noir en AmĂ©rique et dâĂȘtre AmĂ©ricain dans lâAmĂ©rique noire
A Machiavellian Christian: Analyzing the Political Theology of \u27The Prince\u27
This paper attempts to reconsider the role that Christian religion played in the political philosophy of NiccolĂČ Machiavelli, focusing specifically on The Prince. Despite regnant popular and scholastic opinion, this paper posits that Machiavelli\u27s ideological foundation falls squarely into the theological and moral traditions and scripture of Christianity, and is thus an inseparable element of the political theory of Machiavelli. Further, this work seeks to illustrate the presence of orthodox political and religious beliefs contained within The Prince and throughout the Machiavellian corpus, focusing on the socio-political milieu of Renaissance Florence and the broader traditions of humanist thought. In doing so, this paper argues for a much more religiously-compatible understanding of Machiavelli and his political philosophy, even going so far as to place the Christian God at the center of his political advice in The Prince
A Spin-Orbit Alignment for the Hot Jupiter HATS-3b
We have measured the alignment between the orbit of HATS-3b (a recently
discovered, slightly inflated Hot Jupiter) and the spin-axis of its host star.
Data were obtained using the CYCLOPS2 optical-fiber bundle and its simultaneous
calibration system feeding the UCLES spectrograph on the Anglo-Australian
Telescope. The sky-projected spin-orbit angle of was
determined from spectroscopic measurements of Rossiter-McLaughlin effect. This
is the first exoplanet discovered through the HATSouth transit survey to have
its spin-orbit angle measured. Our results indicate that the orbital plane of
HATS-3b is consistent with being aligned to the spin axis of its host star. The
low obliquity of the HATS-3 system, which has a relatively hot mid F-type host
star, agrees with the general trend observed for Hot Jupiter host stars with
effective temperatures K to have randomly distributed spin-orbit angles.Comment: 13 pages. Accepted for publication in the Astrophysical Journa
The Impact of Line Misidentification on Cosmological Constraints from Euclid and other Spectroscopic Galaxy Surveys
We perform forecasts for how baryon acoustic oscillation (BAO) scale and
redshift-space distortion (RSD) measurements from future spectroscopic emission
line galaxy (ELG) surveys such as Euclid are degraded in the presence of
spectral line misidentification. Using analytic calculations verified with mock
galaxy catalogs from log-normal simulations we find that constraints are
degraded in two ways, even when the interloper power spectrum is modeled
correctly in the likelihood. Firstly, there is a loss of signal-to-noise ratio
for the power spectrum of the target galaxies, which propagates to all
cosmological constraints and increases with contamination fraction, .
Secondly, degeneracies can open up between and cosmological parameters.
In our calculations this typically increases BAO scale uncertainties at the
10-20% level when marginalizing over parameters determining the broadband power
spectrum shape. External constraints on , or parameters determining the
shape of the power spectrum, for example from cosmic microwave background (CMB)
measurements, can remove this effect. There is a near-perfect degeneracy
between and the power spectrum amplitude for low values, where
is not well determined from the contaminated sample alone. This has the
potential to strongly degrade RSD constraints. The degeneracy can be broken
with an external constraint on , for example from cross-correlation with a
separate galaxy sample containing the misidentified line, or deeper
sub-surveys.Comment: 18 pages, 7 figures, updated to match version accepted by ApJ (extra
paragraph added at the end of Section 4.3, minor text edits
Floquet Chern Insulators of Light
Achieving topologically-protected robust transport in optical systems has
recently been of great interest. Most topological photonic structures can be
understood by solving the eigenvalue problem of Maxwell's equations for a
static linear system. Here, we extend topological phases into dynamically
driven nonlinear systems and achieve a Floquet Chern insulator of light in
nonlinear photonic crystals (PhCs). Specifically, we start by presenting the
Floquet eigenvalue problem in driven two-dimensional PhCs and show it is
necessarily non-Hermitian. We then define topological invariants associated
with Floquet bands using non-Hermitian topological band theory, and show that
topological band gaps with non-zero Chern number can be opened by breaking
time-reversal symmetry through the driving field. Furthermore, we show that
topological phase transitions between Floquet Chern insulators and normal
insulators occur at synthetic Weyl points in a three-dimensional parameter
space consisting of two momenta and the driving frequency. Finally, we
numerically demonstrate the existence of chiral edge states at the interfaces
between a Floquet Chern insulator and normal insulators, where the transport is
non-reciprocal and uni-directional. Our work paves the way to further exploring
topological phases in driven nonlinear optical systems and their optoelectronic
applications, and our method of inducing Floquet topological phases is also
applicable to other wave systems, such as phonons, excitons, and polaritons
Planets in Spin-Orbit Misalignment and the Search for Stellar Companions
The discovery of giant planets orbiting close to their host stars was one of
the most unexpected results of early exoplanetary science. Astronomers have
since found that a significant fraction of these 'Hot Jupiters' move on orbits
substantially misaligned with the rotation axis of their host star. We recently
reported the measurement of the spin-orbit misalignment for WASP-79b by using
data from the 3.9 m Anglo-Australian Telescope. Contemporary models of
planetary formation produce planets on nearly coplanar orbits with respect to
their host star's equator. We discuss the mechanisms which could drive planets
into spin-orbit misalignment. The most commonly proposed being the Kozai
mechanism, which requires the presence of a distant, massive companion to the
star-planet system. We therefore describe a volume-limited direct-imaging
survey of Hot Jupiter systems with measured spin-orbit angles, to search for
the presence of stellar companions and test the Kozai hypothesis.Comment: Accepted for publication in the peer-reviewed proceedings of the 13th
annual Australian Space Science Conferenc
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