16,550 research outputs found
A unified approach to one-dimensional elastic waves by the method of characteristics
Unified approach to one-dimensional elastic waves by method of characteristic
Wave propagation in stepped and joined shells Annual report, 1 Sep. 1968 - 1 Sep. 1969
Shell impact response and wave propagation in cylindrical and conical shells by experimental and analytical method
Temporal Dynamics of Photon Pairs Generated by an Atomic Ensemble
The time dependence of nonclassical correlations is investigated for two
fields (1,2) generated by an ensemble of cold Cesium atoms via the protocol of
Duan et al. [Nature Vol. 414, p. 413 (2001)]. The correlation function R(t1,t2)
for the ratio of cross to auto-correlations for the (1,2) fields at times
(t1,t2) is found to have a maximum value Rmax=292(+-)57, which significantly
violates the Cauchy-Schwarz inequality R<=1 for classical fields. Decoherence
of quantum correlations is observed over 175 ns, and is described by our model,
as is a new scheme to mitigate this effect.Comment: 5 pages, 5 figure
Prediction of Laminar and Turbulent Boundary Layer Flow Separation in V/STOL Engine Inlets
A description is presented of the development of the boundary layer on the lip and diffuser surface of a subsonic inlet at arbitrary operating conditions of mass flow rate, free stream velocity and incidence angle. Both laminar separation on the lip and turbulent separation in the diffuser are discussed. The agreement of the theoretical results with model experimental data illustrates the capability of the theory to predict separation. The effects of throat Mach number, inlet size, and surface roughness on boundary layer development and separation are illustrated
Fluctuations of Entropy Production in Partially Masked Electric Circuits: Theoretical Analysis
In this work we perform theoretical analysis about a coupled RC circuit with
constant driven currents. Starting from stochastic differential equations,
where voltages are subject to thermal noises, we derive time-correlation
functions, steady-state distributions and transition probabilities of the
system. The validity of the fluctuation theorem (FT) is examined for scenarios
with complete and incomplete descriptions.Comment: 4 pages, 1 figur
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