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Effect Of Temperature on The Absorption Loss Of Chalcogenide Glass Fibers
(Optical Society of America, 1999)
The change in the absorption loss of IR-transmitting chalcogenide glass fibers in the temperature range? of -90 degrees C less than or equal to T less than or equal to 70 degrees C was investigated. For sulfur-based glass ...
Visibility-Dependent Depth Of Focus For Incoherent Sinusoidal Sources
(Optical Society of America, 1992-05-01)
A visibility-dependent depth of focus is developed for incoherent sinusoidal sources. This analysis is based on a derived relationship between the visibility and the optical transfer function (OTF). The formalism developed ...
Active suppression of acoustic radiation from impulsively excited structures
(Acoustical Society of America, 1991-12-01)
The objective is to use active control to suppress the acoustic energy that is radiated to the far field from a structure that has been excited by a short-duration pulse. The problem is constrained by the assumption that ...
Stress-dependent growth kinetics of ultraviolet-induced refractive index change and defect centers in highly Ge-doped SiO2 core fibers
(AIP Publishing, 1999-10-01)
The evolution of the index change of type-IIa gratings observed in 28 mol % Ge-SiO2 core fibers with 1.8 mu m core diameter under various strains was measured from the optical spectra, and the induced defects at high and ...
On the evanescent fields and the causality of the focus wave modes
(AIP Publishing, 1995-08-01)
The diverging and converging field components of the source-free focus wave modes are studied within the framework of both the Whittaker and Weyl plane wave expansions, It is shown that, in the Weyl picture, the evanescent ...
Research on Design for Prevention of Ditch Erosion on Virginia Highways
(Virginia Center for Transportation Innovation and Research, 1999-12-01)
Roadside ditch erosion has been problematic on Virginia highways. VDOT, through the Virginia Transportation Research Council, requested that roadside ditch erosion be investigated by means of a research project. Virginia ...
Notch Spatial Filtering with an Acousto-Optic Modulator
(Optical Society of America, 1998)
The role of acousto-optic (AO) modulators in programmable real-time image processing has recently been demonstrated. For fully investigating the image-processing capabilities of the AO modulator, general techniques to ...
Transient Flow Of Thermotropic Liquid-Crystalline Polymers in Step Strain Experiments
(AIP Publishing, 1990-07-01)
The transient response of two thermotropic liquid crystalline polymers (a copolyester of 60 mol_% p_hydroxybenzoic acid, PHB, and 40 mol_% poly(ethylene terephthalate), PET, and a copolyester of PHB and 2_hydroxy_6_naphthoic ...
Order Preserving Minimal Perfect Hash Functions and Information Retrieval
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1991), TR-91-01
Rapid access to information is essential for a wide variety of retrieval systems and applications. Hashing has long been used when the fastest possible direct search is desired, but is generally not appropriate when ...
An Operation Model Supporting the Generation of Requirements That Capture Customer Intent
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1999-11-01), TR-99-05
Product quality is a direct reflection of how well it meets the cutomer's needs. Hence, the ability to capture customer requirements correctly and succinctly is paramount. Unfortunately, within software development frameworks ...