6,037 research outputs found
What it Means To Be a Man: A Character Study of Macduff
In this thesis I will be discussing my process as an actor when approaching a role, specifically the role of Macduff in William Shakespeare’s, Macbeth. I will include a character/script/event analysis as well as a journal of my experiences during the rehearsal process. I will also include production photos, programs, a link to my website, and my headshot and resume at the end
VCU Symphony
VCU SymphonyDaniel Myssyk, conductorJustin Alexander, percussionFriday, October 11, 2019, at 8pmSonia Vlahcevic Concert HallW.E. Singleton Center for the Performing ArtsVirginia Commonwealth UniversityRichmond, Va
Avoiding Loopholes with Hybrid Bell-Leggett-Garg Inequalities
By combining the postulates of macrorealism with Bell locality, we derive a
qualitatively different hybrid inequality that avoids two loopholes that
commonly appear in Leggett-Garg and Bell inequalities. First, locally invasive
measurements can be used, which avoids the "clumsiness" Leggett-Garg inequality
loophole. Second, a single experimental ensemble with fixed analyzer settings
is sampled, which avoids the "disjoint sampling" Bell inequality loophole. The
derived hybrid inequality has the same form as the Clauser-Horne-Shimony-Holt
Bell inequality; however, its quantum violation intriguingly requires weak
measurements. A realistic explanation of an observed violation requires either
the failure of Bell locality, or a preparation-conspiracy of finely tuned and
nonlocally correlated noise. Modern superconducting and optical systems are
poised to implement this test.Comment: 5 pages, 3 figures, published versio
Scattering of Spinning Black Holes from Exponentiated Soft Factors
We provide evidence that the classical scattering of two spinning black holes
is controlled by the soft expansion of exchanged gravitons. We show how an
exponentiation of Cachazo-Strominger soft factors, acting on massive
higher-spin amplitudes, can be used to find spin contributions to the
aligned-spin scattering angle, conjecturally extending previously known results
to higher orders in spin at one-loop order. The extraction of the classical
limit is accomplished via the on-shell leading-singularity method and using
massive spinor-helicity variables. The three-point amplitude for arbitrary-spin
massive particles minimally coupled to gravity is expressed in an exponential
form, and in the infinite-spin limit it matches the effective stress-energy
tensor of the linearized Kerr solution. A four-point gravitational Compton
amplitude is obtained from an extrapolated soft theorem, equivalent to gluing
two exponential three-point amplitudes, and becomes itself an exponential
operator. The construction uses these amplitudes to: 1) recover the known
tree-level scattering angle at all orders in spin, 2) recover the known
one-loop linear-in-spin interaction, 3) match a previous conjectural expression
for the one-loop scattering angle at quadratic order in spin, 4) propose new
one-loop results through quartic order in spin. These connections link the
computation of higher-multipole interactions to the study of deeper orders in
the soft expansion.Comment: 29 pages + appendices + refs, 3 figures; v3 minor corrections,
journal versio
Violating the Modified Helstrom Bound with Nonprojective Measurements
We consider the discrimination of two pure quantum states with three allowed
outcomes: a correct guess, an incorrect guess, and a non-guess. To find an
optimum measurement procedure, we define a tunable cost that penalizes the
incorrect guess and non-guess outcomes. Minimizing this cost over all
projective measurements produces a rigorous cost bound that includes the usual
Helstrom discrimination bound as a special case. We then show that
nonprojective measurements can outperform this modified Helstrom bound for
certain choices of cost function. The Ivanovic-Dieks-Peres unambiguous state
discrimination protocol is recovered as a special case of this improvement.
Notably, while the cost advantage of the latter protocol is destroyed with the
introduction of any amount of experimental noise, other choices of cost
function have optima for which nonprojective measurements robustly show an
appreciable, and thus experimentally measurable, cost advantage. Such an
experiment would be an unambiguous demonstration of a benefit from
nonprojective measurements.Comment: 5 pages, 2 figure
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Complex refractive index, single scattering albedo, and mass absorption coefficient of secondary organic aerosols generated from oxidation of biogenic and anthropogenic precursors
Refractive index and optical properties of biogenic and anthropogenic secondary organic aerosol (SOA) particles were investigated. Aerosol precursors, namely longifolene, α-pinene, 1-methylnaphthalene, phenol, and toluene were oxidized in a Teflon chamber to produce SOA particles under different initial hydrocarbon concentrations and hydroxyl radical sources, reflecting exposures to different levels of nitrogen oxides (NOx). The real and imaginary components (n and k, respectively) of the refractive index at 375 nm and 632 nm were determined by Mie theory calculations through an iterative process, using the χ2 function to evaluate the fitness of the predicted optical parameters with the measured scattering, absorption, and extinction coefficients from a Photoacoustic Extinctiometer and Cavity Attenuated Phase Shift Spectrometer. Single scattering albedo (SSA) and bulk mass absorption coefficient (MAC) at 375 nm were calculated. SSA values of SOA particles from biogenic precursors (longifolene and α-pinene) were ∼0.98–0.99 (∼6.3% uncertainty), reflecting purely scattering aerosols regardless of the NOx regime. However, SOA particles from aromatic precursors were more absorbing and displayed NOx-dependent SSA values. For 1-methylnaphthalene SOA particles, SSA values of 0.92–0.95 and ∼0.75–0.90 (∼6.1% uncertainty) were observed under intermediate- and high-NOx conditions, respectively, reflecting the absorbing effects of SOA particles and NOx chemistry for this aromatic system. In mixtures of longifolene and phenol or longifolene and toluene SOA under intermediate- and high-NOx conditions, k values of the aromatic-related component of the SOA mixture were higher than that of 1-methylnaphthalene SOA particles. With the increase in OH exposure, kphenol decreased from 0.10 to 0.02 and 0.22 to 0.05 for intermediate- and high-NOx conditions, respectively. A simple relative radiative forcing calculation for urban environments at λ = 375 nm suggests the influence of absorbing SOA particles on relative radiative forcing at this wavelength is most significant for aerosol sizes greater than 0.4 µm. Copyright © 2019 American Association for Aerosol Research</p
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