21,960 research outputs found
Said and the Mythmaking of Auerbach\u27s Mimesis
In her article Said and the Mythmaking of Auerbach\u27s Mimesis Hyeryung Hwang revisits critical debates on Edward W. Said\u27s unwitting participation in the mythmaking of Erich Auerbach\u27s Mimesis and analyzes the degree to which critical discourse overlook what Said actually wanted to revive, namely the spirit of philological methodology. Hwang argues that before Said worked on Mimesis, the book already acquired a sort of myth. Hwang attempts to go beyond the commonly held understanding of philology and suggest it as a methodology for historical synthesis whose dialectical tension between texts and history amounts to the synthesis of fact and truth
Loss Functions for Set Estimations
23 pages, 1 article*Loss Functions for Set Estimations* (Casella, George; Hwang, J. T.-Gene; Robert, Christian P.) 23 page
New Models for X-Ray Synchrotron Radiation from the Remnant of Supernova 1006 AD
Galactic cosmic rays up to energies of around 10^15 eV are assumed to
originate in supernova remnants (SNRs). The shock wave of a young SNR like SN
1006 AD can accelerate electrons to energies greater than 1 TeV, where they can
produce synchrotron radiation in the X-ray band. A new model (SRESC) designed
to model synchrotron X-rays from Type Ia supernovae can constrain values for
the magnetic-field strength and electron scattering properties, with
implications for the acceleration of the unseen ions which dominate the
cosmic-ray energetics. New observations by ASCA, ROSAT, and RXTE have provided
enormously improved data, which now extend to higher X-ray energies. These data
allow much firmer constraints. We will describe model fits to these new data on
SN 1006 AD, emphasizing the physical constraints that can be placed on SNRs and
on the cosmic-ray acceleration process.Comment: 10 pages, 2 figures. to appear in "Cosmic Explosions", proceeding of
the 10th Annual October Astrophysics Conference (ed. S.S. Holt and W. W.
Zhang) LaTex aipproc.st
Three-Nucleon Electroweak Capture Reactions
Recent advances in the study of the p-d radiative and mu-3he weak capture
processes are presented and discussed. The three-nucleon bound and scattering
states are obtained using the correlated-hyperspherical-harmonics method, with
realistic Hamiltonians consisting of the Argonne v14 or Argonne v18 two-nucleon
and Tucson-Melbourne or Urbana IX three-nucleon interactions. The
electromagnetic and weak transition operators include one- and two-body
contributions. The theoretical accuracy achieved in these calculations allows
for interesting comparisons with experimental data.Comment: 12 pages, 4 figures, invited talk at the CFIF Fall Workshop: Nuclear
Dynamics, from Quarks to Nuclei, Lisbon, 31st of October - 1st of November
200
Pressure and current balance conditions during electron beam injections from spacecraft
Electrostatic charging level of a conducting surface in response to injections of electron beams into space plasma is investigated by means of one-dimensional Vlasov code. Injections of Maxwellian beams into a vacuum shows that the surface can charge up to an electric potential phi sub s greater than W sub b, where W sub b is the average electron beam energy. Since Maxwellian beams have extended trails with electrons having energies greater than W sub b, it is difficult to quantify the charging level in terms of the energies of the injected electrons. In order to quantitatively understand the charging in excess of W sub b, simulations were carried out for water-bag types of beam with velocity distribution functions described by f(V) = A for V sub min approx. less than V approx. less than V sub max and f(V) = O otherwise, where A is a constant making the normalized beam density unity. It is found that V sub max does not directly determine the charging level. The pressure distribution in the electron sheath determines the electric field distribution near the surface. The electric field in turn determines the electrostatic potential of the vehicle. The pressure distribution is determined by the beam parameters such as the average beam velocity and the velocity spread of the beam
The Unexpected Role of Final State Interactions in Deep Inelastic Scattering
Rescattering of the struck quark in Deep Inelastic Scattering implies that
measured parton distributions are not directly related to the Fock state
probabilities of the target wave function. The production amplitudes acquire
dynamical phases, which gives rise to shadowing and diffraction in DIS. I
review the kinematics and dynamics of DIS as seen in various frames and gauges.Comment: 11 pages, 6 figures. Talk at the "International Conference: I. Ya.
Pomeranchuk and Physics at the Turn of the Centuries", Moscow, January 200
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