Kieffaber P.D.,College of William and Mary
Frontiers in Human Neuroscience | Year: 2012
The primary aim of this research was to determine how modulation of the visual mismatch negativity (vMMN) by emotionally laden faces is related to autism spectrum personality traits. Emotionally neutral faces served as the standard stimuli and happy and sad expressions served as vMMN-eliciting deviants. Consistent with prior research, it was anticipated that the amplitude of the vMMN would be increased for emotionally salient stimuli. Extending this finding, it was expected that this emotion-based amplitude sensitivity of the vMMN would be decreased in individuals with higher levels of autism spectrum personality traits as measured by the Adult Autism Spectrum Quotient (AQ). Higher AQ scores were associated with smaller amplitudes of the vMMN in response to happy, but not sad emotional deviants. The fact that higher AQ scores were associated with less sensitivity only to happy emotional expressions is interpreted to be consistent with the negative experience of social interactions reported by individuals who are high on the autism spectrum. This research suggests that that the vMMN elicited by deviant emotional expressions may a useful indicator of affective reactivity and may be related to social competency in ASD. © 2012 Gayle, Gal and Kieffaber.
Feldman J.L.,University of California at Los Angeles |
Del Negro C.A.,College of William and Mary |
Gray P.A.,University of Washington
Annual Review of Physiology | Year: 2013
Breathing is an essential behavior that presents a unique opportunity to understand how the nervous system functions normally, how it balances inherent robustness with a highly regulated lability, how it adapts to both rapidly and slowly changing conditions, and how particular dysfunctions result in disease. We focus on recent advancements related to two essential sites for respiratory rhythmogenesis: (a) the preBötzinger Complex (preBötC) as the site for the generation of inspiratory rhythm and (b) the retrotrapezoid nucleus/parafacial respiratory group (RTN/pFRG) as the site for the generation of active expiration. Copyright © 2013 by Annual Reviews. All rights reserved.
Weiss B.,College of William and Mary
Cultural Anthropology | Year: 2011
This article offers an attempt to characterize the relationship between "taste" and "place" as cultivated and embodied in the production, circulation, and consumption of pasture-raised pork. I focus on the Piedmont region of North Carolina, and offer ethnographic evidence drawn from working with farmers, chefs and restaurant workers, as well as consumers at farmers' markets to give substance to these discussions. The argument problematizes the category of "local food," to interrogate the very notion of "place" and its many "tastes" (and other experiential qualities) with respect to the remaking and remapping of food production in the Piedmont. "Local food" is widely celebrated in this region, and pastured pork is a critical index of this "locality"; but here I ask how place itself is constituted, assigned concrete, experiential qualities, and so grasped in social practice. More than an attempt to specify the qualities of "the local" and their relationship with regional foodways, this article is concerned with the process that Lefebvre calls "the production of space.". © 2011 by the American Anthropological Association.
Carone C.D.,College of William and Mary
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2013
The possibility of explaining the current value of the muon anomalous magnetic moment in models with an additional U(1) gauge symmetry that has kinetic mixing with hypercharge are increasingly constrained by dark photon searches at electron accelerators. Here we present a scenario in which the couplings of new, light gauge bosons to standard model leptons are naturally weak and flavor nonuniversal. A vector-like state that mixes with standard model leptons serves as a portal between the dark and standard model sectors. The flavor symmetry of the model assures that the induced couplings of the new gauge sector to leptons of the first generation are very small and lepton-flavor-violating processes are adequately suppressed. The model provides a framework for constructing ultraviolet complete theories in which new, light gauge fields couple weakly and dominantly to leptons of the second or third generations. © 2013 Elsevier B.V.
Meinel S.,College of William and Mary
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2012
The spectrum of baryons containing three b quarks is calculated in nonperturbative QCD, using the lattice regularization. The energies of ten excited bbb states with JP=12 +, 32 +, 52 +, 72 +, 12 -, and 32 - are determined with high precision. A domain-wall action is used for the up, down, and strange quarks, and the bottom quarks are implemented with nonrelativistic QCD. The computations are done at lattice spacings of a≈0.11fm and a≈0.08fm, and the results demonstrate the improvement of rotational symmetry as a is reduced. A large lattice volume of (2.7fm)3 is used, and extrapolations of the bbb spectrum to realistic values of the light sea-quark masses are performed. All spin-dependent energy splittings are resolved with total uncertainties of order 1 MeV, and the dependence of these splittings on the couplings in the nonrelativistic QCD action is analyzed. © 2012 American Physical Society.