27,903 research outputs found
Lexical Effects in Perception of Tamil Geminates
Lexical status effects are a phenomenon in which listeners use their prior lexical knowledge of a language to identify ambiguous speech sounds in a word based on its word or nonword status. This phenomenon has been demonstrated for ambiguous initial English consonants (one example being the Ganong Effect, a phenomenon in which listeners perceive an ambiguous speech sound as a phoneme that would complete a real word rather than a nonsense word) as a supporting factor for top-down lexical processing affecting listeners' subsequent acoustic judgement, but not for ambiguous mid-word consonants in non-English languages. In this experiment, we attempt to look at ambiguous mid-word consonants with Tamil, a South Asian language in order to see if the same top-down lexical effect was applicable outside of English. These Tamil consonants can present as either singletons (single speech sounds) or geminates (doubled speech sounds).We hypothesized that by creating ambiguous stimuli between a geminate word kuppam and a singleton non-word like kubam, participants would be more likely to perceive the ambiguous sound as a phoneme that completes the real word rather than the nonword (in this case, perceiving the ambiguous sound as a /p/ for kuppam instead of kubam). Participants listened to the ambiguous stimuli in two separate sets of continua (kuppam/suppam and nakkam/pakkam) and then indicated which word they heard in a four-alternative forced choice word identification task. Results showed that participants identified the ambiguous sounds as the sound that completed the actual word, but only for one set of continua (kuppam/suppam). These data suggest that there may be strong top-down lexical effects for ambiguous sounds in certain stimuli in Tamil, but not others.No embargoAcademic Major: LinguisticsAcademic Major: Psycholog
Classical methods in DIS and nuclear scattering at small x
In hadrons and nuclei at very small x, parton distributions saturate at a
scale Q_s(x). Since the occupation number is large, and
, classical weak coupling methods may be used to study
this novel regime of non-linear classical fields in QCD. In these lectures, we
apply these methods to compute structure functions in deeply inelastic
scattering (DIS) and the energy density of gluons produced in high energy
nuclear collisions.Comment: Latex, 41 pgs. Lectures at the XXXIX Cracow School of Theoretical
Physics, Zakopane, Poland, May29th-June8th, 199
Deeply inelastic scattering off nuclei at RHIC
We discuss the physics case for an electron--nucleus collider at RHIC.Comment: 36 pages LaTex, 10 figures, Plenary talk at EPIC meeting, MIT,
September 14th-16th, 200
From many body wee parton dynamics to perfect fluid: a standard model for heavy ion collisions
We discuss a standard model of heavy ion collisions that has emerged both
from the experimental results of the RHIC program and associated theoretical
developments. We comment briefly on the impact of early results of the LHC
program on this picture. We consider how this standard model of heavy ion
collisions could be solidified or falsified in future experiments at RHIC, the
LHC and a future Electron-Ion Collider.Comment: Extended version of Plenary Talk at the 35th International Conference
on High Energy Physics (ICHEP2010), Paris, France, July 22-28, 2010. 14
pages, 9 figure
-Expansion in the Gross-Neveu CFT
We use the recently developed CFT techniques of Rychkov and Tan to compute
anomalous dimensions in the Gross-Neveu model in
dimensions. To do this, we extend the "cowpie contraction" algorithm of
arXiv:1506.06616 to theories with fermions. Our results match perfectly with
Feynman diagram computations.Comment: v2: a correction in contraction algorithm (main results unchanged),
references and an appendix added, discussion less rushe
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