Browsing by Issue Date
Now showing items 6180 of 3227

Error Bounds for Two Even Degree Tridiagonal Splines
(1990)We study a C(¹) parabolic and a C(²) quartic spline which are determined by solution of a tridiagonal matrix and which interpolate subinterval midpoints. In contrast to the cubic C(²) spline, both of these algorithms ... 
Strong Maximum Principles for Parabolic Nonlinear Problems With Nonlocal Inequalities Together With Integrals
(1990)In [4] and [5], the author studied strong maximum principles for nonlinear parabolic problems with initial and nonlocal inequalities, respectively. Our purpose here is to extend results in [4] and [5] to strong maximum ... 
Asymptotic Optimality of Experimental Designs in Estimating a Product of Means
(1990)In nonlinear estimation problems with linear models, one difficulty in obtaining optimal designs is their dependence on the true value of the unknown parameters. A Bayesian approach is adopted with the assumption the means ... 
Perturbations of gravitational instantons
(19900115)Ashtekar's spinorial formulation of general relativity is used to study perturbations of gravitational instantons corresponding to finiteaction solutions of the Euclidean Einstein equations (with a nonzero cosmological ... 
Image preprocessing for phaseonly filtering
(19900205)We compare the performance of an optical binary phaseonly correlator using several nonlinear filters for preprocessing. An image of an airfield with different but similar appearing planes is used as the input data. The ... 
Fiberoptic sensor and smart structures research at Florida Institute of Technology
(19900205)This paper discusses the fundamental issues being investigated by Florida Institute of Technology (F.I.T.) to implement the technology of smart structural systems for DoD, NASA, and commercial applications. Embedded sensors ... 
Processing of onefiber interferometric fiberoptic sensor signals
(19900213)Recent research conducted in the Fiber Optic Sensor Systems Laboratory at Florida Institute of Technology in fiber optic strain sensors for use in smart structures has concentrated primarily on one fiber interferometers. ... 
Analytic variational method for Hamiltonian lattice gauge theory in 3 + 1 dimensions
(19900315)We present an analytic d in 3 + 1 dimensions for Hamiltonian lattice gauge theory. This method is based on Batrouni's meanplaquette method and space integration. The Abelianized Bianchi identities are used and a detailed ... 
Experimental performance of a binary phaseonly optical correlator using visual and infrared imagery
(19900901)Experimental results of an optical binary phaseonly correlator using both visual and IR imagery are presented. The inputs to the correlator originate from actual aerial imagery containing aircraft and a variety of ... 
Optical processors for smart structures
(19900901)For underwater fiberoptic sensor arrays containing hundreds of sensors as well as smart aerospace structures and skins using fiberoptic strain sensor arrays, the output of the sensors are optical signals that are a ... 
Four shortperiod algols
(199010)We have analyzed the light curves of four close binary star systems (BV 267, RU UMi, XZ CMi, and VV UMa) using the WilsonDevinney differential corrections model. The present system geometries of these binaries is that of ... 
On Modulated Random Measures
(1991)In this paper the author introduces the notion of a modulated marked random measure, Zξ on the class of locally compact and σcompact spaces with countable bases. As special cases, are marked processes modulated by ξ are ... 
A singleserver queue with random accumulation level
(1991)The author studies the queueing process in a singleserver bulk queueing system. Upon completion of a previous service, the server can take a group of random size from customers that are available. Or, the server can wait ... 
Error estimates for the semidiscrete finite element approximation of linear nonlocal parabolic equations
(1991)Existence and uniqueness are proved for nonlocal (in time) for solutions of linear parabolic partial differential equations. Instead of an initial condition, there is a relation connecting the initial value to values of ... 
Unique Solution to Periodic Boundary Value Problems
(1991)Existence of unique solution to periodic boundary value problems of differential equations with continuous or discontinuous righthand side is considered by utilizing the method of lower and upper solutions and the monotone ... 
A first passage problem and its applications to the analysis of a class of stochastic models
(1991)A problem of the first passage of a cumulative random process with generally distributed discrete or continuous increments over a fixed level is considered in the article as an essential part of the analysis of a class of ... 
On a singleserver queue with fixed accumulation level, state dependent service, and semimarkov modulated input flow
(1991)The authors study the queueing process in a singleserver queueing system with state dependent service and with the input modulated by a semiMarkov process embedded in the queueing process. It is also assumed that the ... 
Gaussian reference fluid and interpretation of
(19910115)The of vacuum geometrodynamics is turned into a Schrödinger equation by imposing the normal Gaussian coordinate conditions with s and then restoring the coordinate invariance of the action by parametrization. This procedure ... 
UV observations of the cool DBQA5 white dwarf LDS 678A: Limits on the atmospheric composition, pressure shift, and gravitational redshift derived from C I 2479
(199102)We present a highresolution ultraviolet spectrum of the heliumrich degenerate LDS 678A, obtained with the International Ultraviolet Explorer (IUE) satellite. LDS 678A is the coolest metallic line degenerate (DQ or DZ) ... 
The physical properties of double degenerate common proper motion binaries
(199104)We present spectral types and spectrophotometry for 21 double degenerate (DD) common proper motion binaries and provide estimates of their colors, absolute visual and bolometric magnitudes, and cooling ages. The most typical ...