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Tunable spatial-filtering with a Fabry-Perot etalon
(Optical Society of America, 1980-08)
A Fabry-Perot etalon is used in the image plane as a means of selecting arbitrary directions of propagation in the angular spectrum of an object. This provides a simple widely tunable spatial filter that could be useful ...
Convergent methods for calculating thermodynamic Green functions
(American Physical Society, 1984-08)
A convergent method of approximating thermodynamic Green functions is outlined briefly. The method constructs a sequence of approximants which converges independently of the strength of the Hamiltonian's coupling constants. ...
Rotational matched spatial filter for biological pattern recognition
(Optical Society of America, 1980-06)
Randomly oriented microbiological patterns are recognized by rotating a matched spatial filter with an optical wedge prism. The filter is made from a composite input pattern with various sized objects to cover wider ranges ...
Analytic theory for the selection of a two-dimensional needle crystal at arbitrary Péclet number
(American Physical Society, 1989-10)
An accurate analytic theory is presented for the velocity selection of a two-dimensional needle crystal for arbitrary Péclet number for small values of the surface-tension parameter. The velocity selection is caused by the ...
Diffusion of muonic atoms
(American Physical Society, 1988-10)
Transport of muonic hydrogen and deuterium atoms in gaseous hydrogen and deuterium is studied in the diffusion approximation and by means of the multiple-collision expansion. The diffusion coefficient is derived. Numerical ...
High-resolution time-of-flight mass spectrometry impulse-field focusing pulse generators
(AIP Publishing, 1986-08)
Experiments have shown that the unit mass resolution of conventional Wiley-McLaren time_of_flight (TOF)mass spectrometers can be significantly improved using the technique of impulse_field focusing (IFF). Details of the ...
Exact behavior of Jost functions at low energy
(AIP Publishing, 1988-01)
For Schrödinger operators with central potential q(r) and angular momentuml, the behavior of the Jost function F l (k) as k→0 is investigated. It is assumed that ∫∞ 0 d r (1+r)σ‖q(r)‖<∞, where σ≥1. Situations where q is ...
Viscosity and density stratification in vertical Poiseuille flow
(AIP Publishing, 1987-06)
The linear stability of plane three_layer vertical Poiseuille flow is considered. The layers are composed of two immiscible fluids, one next to the walls and one centrally located. The fluids have different viscosities and ...
Couette flow of a binary gas mixture
(AIP Publishing, 1988-03)
The linearized binary model described by Hamel [Phys. Fluids 8, 418 (1964)] is used to obtain a set of kinetic equations and boundary conditions for the Couette flow problem. The derived set of two coupled integrodifferential ...
k-space function spaces
(Hindawi, 1980-01-01)
A study is made of the properties on X which characterize when Cπ(X) is a k-space, where Cπ(X) is the space of real-valued continuous functions on X having the topology of pointwise convergence. Other properties related ...