19,406 research outputs found
The body in the library: adventures in realism
This essay looks at two aspects of the virtual ‘material world’ of realist fiction: objects encountered by the protagonist and the latter’s body. Taking from Sartre two angles on the realist pact by which readers agree to lend
their bodies, feelings, and experiences to the otherwise ‘languishing signs’ of the text, it goes on to examine two sets of first-person fictions published between 1902 and 1956 — first, four modernist texts in which banal objects defy and then gratify the protagonist, who ends up ready and almost able to write; and, second, three novels in which the body of the protagonist is indeterminate in its sex, gender, or sexuality. In each of these cases, how do we as readers make texts work for us as ‘an adventure of the body’
Inhomogeneity and transverse voltage in superconductors
Voltages parallel and transverse to electric current in slightly
inhomogeneous superconductors can contain components proportional to the field
and temperature derivatives of the longitudinal and Hall resistivities. We show
that these anomalous contributions can be the origin of the zero field and
even-in-field transverse voltage occasionally observed at the superconductor to
normal state transition. The same mechanism can also cause an anomaly in the
odd-in-field transverse voltage interfering the Hall effect signal.Comment: 6 pages, 7 figure
Assignments in the electronic spectrum of water
To explain the inelastic feature at 4.5 eV in the spectrum of water and to study its spectrum in some detail, we have carried out several calculations on the excited states of water using the equations‐of‐motion method. We conclude that the calculated vertical excitation energy of 6.9 eV for the ^3B_1 state corresponds to the strong feature at 7.2 eV observed in low‐energy electron scattering spectrum. The 4.5 eV inelastic process almost certainly does not correspond to a vertical excitation of water at the ground state geometry. The other excitation energies and oscillator strengths agree well with experiment
Analysis of Yield Spreads on Commercial Mortgage-Backed Securities
Yield spreads on commercial mortgage-backed securities (CMBS) are defined as the difference between the yield on CMBS and the yield on comparable-maturity Treasuries. CMBS yield spreads declined dramatically from 1992 until 1997, then increased in 1998 and 1999. The relationship between CMBS yield spreads and other variables is estimated in an effort to explain recent trends. Results identify several variables that are related to yield spreads on both fixed-rate and variable-rate CMBS. However, even after controlling for other observable factors, the yield spread on CMBS still declined from 1992 until 1997, then increased each of the next two years. Possible explanations for this phenomenon are explored.
Public Health Laboratories: Unprepared and Overwhelmed
Addresses the role of public health labs within the public health system and their ability to respond to specific chemical weapon events. Provides recommendations for improving response to terrorism as well as more conventional threats
A Geometric Model of Arbitrary Spin Massive Particle
A new model of relativistic massive particle with arbitrary spin
(()-particle) is suggested. Configuration space of the model is a product
of Minkowski space and two-dimensional sphere, . The system describes Zitterbewegung at the classical level.
Together with explicitly realized Poincar\'e symmetry, the action functional
turns out to be invariant under two types of gauge transformations having their
origin in the presence of two Abelian first-class constraints in the Hamilton
formalism. These constraints correspond to strong conservation for the
phase-space counterparts of the Casimir operators of the Poincar\'e group.
Canonical quantization of the model leads to equations on the wave functions
which prove to be equivalent to the relativistic wave equations for the massive
spin- field.Comment: 25 pages; v2: eq. (45.b) correcte
Dynamics of coherences in the interacting double-dot Aharonov-Bohm interferometer: Exact numerical simulations
We study the real time dynamics of electron coherence in a double quantum dot
two-terminal Aharonov-Bohm geometry, taking into account repulsion effects
between the dots' electrons. The system is simulated by extending a numerically
exact path integral method, suitable for treating transport and dissipation in
biased impurity models [Phys. Rev. B 82, 205323 (2010)]. Numerical simulations
at finite interaction strength are supported by master equation calculations in
two other limits: assuming non-interacting electrons, and working in the
Coulomb blockade regime. Focusing on the intrinsic coherence dynamics between
the double-dot states, we find that its temporal characteristics are preserved
under weak-to-intermediate inter-dot Coulomb interaction. In contrast, in the
Coulomb blockade limit, a master equation calculation predicts coherence
dynamics and a steady-state value which notably deviate from the finite
interaction case
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