Citations Only: Recent submissions
Now showing items 161-180 of 990
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Image deconvolution using a micro genetic algorithm
(Elsevier - Optics Communications, 1997-07-15)Image deconvolution is addressed using a modified Genetic Algorithm for the error minimization. Numerical examples are presented to demonstrate the algorithm’s robustness. Specifically, noise levels and various regions ... -
Fractional correlations based on the modified fractional order Fourier transform
(Society of Photo-Optical Instrumentation Engineers (SPIE) - Optical Engineering, 1998-01)Based on the modified fractional order Fourier transform (MFROFT), we introduce a modified fractional correlation operation (MFCO). We propose two systems to implement the MFCO experimentally. These are analyzed ... -
Spectrophotopolarimeter based on multiple reflections in a coated dielectric slab
(Elsevier - Thin solid films, 1998-02)A division-of-amplitude photopolarimeter is described that uses multiple reflections inside a coated dielectric slab at oblique incidence. The first four parallel reflected beams pass through suitably oriented, but fixed, ... -
Dynamic acousto-optic photopolarimeter/ spectrophotopolarimeter
(Society of Photo-Optical Instrumentation Engineers (SPIE) - Optical Engineering, 1999-07)We propose a novel technique for a new division-of-amplitude photopolarimeter capable of complete measurement of the state of polarization of light, as determined by the four Stokes parameters. This photopolarimeter ... -
Heterodyne detection for Fiber Bragg Grating sensors
(Elsveier - Optics & Laser Technology, 2000-07)In this paper, we present a Fiber-Bragg-Grating-based temperature sensor. The technique employs heterodyne detection using two Fiber Bragg Gratings. One of the gratings is used as a reference (local oscillator) and the ... -
Optical Fourier and Hartley transform adaptive filters
(Microwave and optical technology letters, 2004-01-05)Optical signal-processing architectures are presented to realize frequency-domain implementations of the classical least-mean-square (LMS) adaptive-filtering algorithm. Optical implementation of both Fourier and Hartley ... -
Nonsplit dual-stage EDFA operating in the C- plus L-band
(Microwave and optical technology letters, 2004-07-30)The feasibility of a dual-stage erbium-doped fiber amplifier (EDFA) design for operation in both the C-band and the L-band is studied. The design is comprised of nonsplit single-pass amplification at both bands, thus ... -
Band selection in an amplified spontaneous emission source using the backward-feedback technique
(Wiley, 2005-06)In this paper, the band-selective behavior in an amplified spontaneous emission (ASE) source of an erbium-doped silica fiber (EDF) is demonstrated. C-band operation is obtained without backward ASE feedback, whereas L-band ... -
Post-Newtonian simulations of super-massive black hole binaries in galactic nuclei
(Wiley-VCH Verlag Berlin: Astronomische Nachrichten, 2008-12)We present some preliminary results from recent numerical simulations that model the evolution of super-massive black hole (SMBH) binaries in galactic nuclei. Including the post-Newtonian terms for the binary system and ... -
Towards a spectral technique for determining material geometry around evolved stars: Application to HD 179821
(Wiley-Blackwell, 2008)HD 179821 is an evolved star of unknown progenitor mass range (either post- Asymptotic Giant Branch or post-Red Supergiant) exhibiting a double peaked spectral energy distribution (SED) with a sharp rise from ∼ 8−20 μm. ... -
Chandra x-ray detection of a shocked polar jet in the symbiotic Mira System Hen 2-104
(American Astronomical Society, 2006)We report the detection by Chandra's Advanced CCD Imaging Spectrometer (ACIS) of X-ray emission from Hen 2-104, a D-type symbiotic Mira system that sits at the core of an hourglass-shaped bipolar nebula (the "Southern ... -
Automated x-ray spectral classification of young stellar sources detected in Chandra Orion Ultradeep Project observations
(American Astronomical Society, 2004)We are developing an automated classification technique to group X-ray sources detected in CCD imaging into clusters based on X-ray spectral attributes. The algorithm is non-parametric and uses established multivariate ... -
X-ray diagnostics of pre-main sequence accretion and outflow activity
(2005-07)I summarize the mounting evidence for a direct link between pre-main sequence (pre-MS) X-ray emission and pre-MS accretion and outflow processes. Such a link is supported by three lines of observational inquiry rendered ... -
A systematic approach to determining the limits of nanolithography at extreme NA
(2008-01)In optical imaging, separating the impact of the projection tool from the characteristics of the detector is key to understanding the limits of any exposure system. In semiconductor photolithography the detector is ... -
Modeling and experimental verification of the contact resistance of a novel anisotropic conductive adhesive
(ASME: Proceedings of the ASME International Mechanical Engineering Congress and Exposition, 2007)The need to eliminate lead-based materials as a means of interconnection has renewed the electronics industry's interest in using conductive adhesives for component attach, especially Anisotropic Conductive Adhesives (ACA). ... -
Achieving increased productivity and profitability in an EMS environment using lean manufacturing tools and techniques
(SMTA: SMTA Pan Pacific Microelectronics Symposium, 2003)This research paper discusses the various aspects of lean manufacturing and its importance in electronics manufacturing service (EMS) provider environment. The philosophy of lean manufacturing and the various tools and ... -
Effect of deviating from the reflow process window for lead-free assembly
(SMTA: Journal of Surface Mount Technology, 2005)The primary objective of this research is to determine the influence of deviating from the standard reflow process window for lead-free soldering. As the industry is moving towards lead-free technology, SAC solder alloy ... -
Effect of solder paste and surface finish on 0201 assembly process defects
(SMTA: SMTA International Conference Proceedings, 2004)The trend towards smaller, faster and cheaper electronic devices has led to an increase in the use of 0201 and even smaller sized passive components. The size advantages of 0201 components make it a popular choice among ... -
Lead-free 0201 manufacturing, assembly and reliability test results
(Elsevier, 2006)The trend towards smaller, faster and cheaper electronic devices has led to an increase in the use of 0201 (L not, vert, similar 0.02 in.; W not, vert, similar 0.01 in.) and even smaller sized passive components. The size ... -
Effect of deviating from the reflow process window for lead-free assembly
(SMTA: SMTA International Conference Proceedings, 2005)