Citations Only: Recent submissions
Now showing items 461-480 of 990
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Period three limit-cycles in injected semiconductor lasers
(Institute of Physics Publishing, 2002-02)Experiments showing period three intensity oscillations are reported for a semiconductor laser subject to external injection. These oscillations appear close to a period doubling bifurcation of the fundamental laser ... -
Bistability of pulsating intensities for double-locked laser diodes
(American Physical Society, 2002-05)Rate equations for semiconductor lasers subjected to simultaneous near-resonant optical injection and microwave current modulation are examined by combined analytical-numerical bifurcation techniques. Simple qualitative ... -
Complicated basins in external-cavity semiconductor lasers
(Elsevier Science B.V., 2003-07-21)We demonstrate that complicated basins of attraction can occur in time-delay coupled, external-cavity semiconductor lasers. In particular, we find that there can be multiple coexisting attractors associated with low-frequency ... -
Composition of Fourier integral operators with fold and blowdown singularities
(Taylor and Francis, 2005-11)The purpose of this work is to present results about the composition of Fourier integral operators with certain singularities, for which the composition is not again a Fourier integral operator. The singularities considered ... -
Isomeric and concentration effects of C4-cosurfactants on four-component microemulsions investigated by neutron spin-echo and small-angle scattering
(Institute of Physics and IOP Publishing Limited, 2006-08-24)Neutron spin-echo spectroscopy and small-angle scattering measurements were performed to determine how the isomeric structure and concentration of C4-cosurfactants (i.e. butyl alcohols) influence structure and dynamics in ... -
Study of Schultz distribution to model polydispersity of microemulsion droplets
(American Chemical Society, 1988-03-24)We have employed a histogram analysis method to study the spectra obtained by small-angle neutron scattering (SANS) in order to investigate the size distribution of a model water-in-oil three-component microemulsion. It ... -
A computer simulation study of silver-gold cluster formation on AgBr tabular microcrystals with AgIBr cores
(American Chemical Society (ACS), 2001-08-09)Computer simulation is used to study how an iodobromide core in an AgBr tabular microcrystal affects the efficiency of photoinduced metal cluster formation. Iodide ions can trap photogenerated holes and act as recombination ... -
Environmental effects on laser-induced fluorescence spectra of natural waters
(Elsevier Science B.V., Amsterdam, 1987-02)Laser fluorosensing can be used to monitor dissolved organic carbon (DOC), but analysis of the data can be hindered by several environmental phenomena. These phenomena include attenuation of the laser beam and differential ... -
Laser-induced fluorescence: Limits to the remote detection of hydrogen ion, aluminum, and dissolved organic matter
(Elsevier Science B.V., Amsterdam, 1989-07)Laser-induced fluorescence (LIF) of dissolved organic matter (DOM) in lake water is, to a certain extent, indicative of water quality. DOM fluorescence intensity varies directly with connentration of the fluorescing organic ... -
Excited state properties of Quinoxaline-substituted Platinum 1,2-Enedithiolates
(American Chemical Society (ACS), 1997-04-09)The complexes (dppe)M{S2C2(2-quinoxaline)(R)}, where dppe = (diphenylphosphinoethane, M = Ni, Pd, and Pt, and R = H and Me, have as their lowest-energy band an intraligand charge transfer transition (ILCT). Excitation ... -
Protonation-state-dependent luminescence and excited-state electron-transfer reactions of 2- and 4-Pyridine (-ium)-substituted metallo-1,2-enedithiolates
(American Chemical Society (ACS), 1997-10-01)Luminescence and excited-state electron-transfer reactions of (dppe)Pt{S2C2(2-pyridine)(H)} and (dppe)Pt{S2C2(4-pyridine)(H)} (dppe = diphenyldiphosphinoethane) are enabled by protonation of the appended pyridine, thus ... -
Radiometric scene normalization using pseudoinvariant features
(Elsevier Science B.V., Amsterdam, 1988-10) -
Three-dimensional longwave infrared synthetic image generation incorporating angular emissivity effects using ray-tracing techniques
(The International Society for Optical Engineering (SPIE), 1990-11)A technique for longwave infrared (LWIR) synthetic image generation (510) is shown which yields improved radiomeiric accuracy in the 8-14 .tm bandpass. This process uses a modified LOWTRAN 6 atmospheric transmission/upwelled ... -
Estimating black-level emissions of computer-controlled displays
(John Wiley & Sons, Ltd, 2003-10)It is quite common for computer-controlled displays to emit light in image areas set to digital values of zero, referred to as their black level. This is expected for liquid-crystal displays and also can occur for cathode-ray ... -
Colorimetric characterization of a computer-controlled liquid crystal display
(John Wiley & Sons, Ltd, 2004-10)A new method was used to characterize computer-controlled liquid crystal displays (LCDs). The characterization, which was performed to enable colorimetric image display, included channel independence, spatial independence, ... -
Simulated color gamut mapping using simple rendered images
(The International Society for Optical Engineering (SPIE), 1996-03)In order to systematically evaluate different gamut mapping algorithms, we have simulated gamut mapping on a CRT using simple rendered images of colored spheres floating in front of a gray background. Using CIELab as our ... -
Louis Leon Thurstone in Monte Carlo: creating error bars for the method of paired comparison
(The International Society for Optical Engineering (SPIE), 2003-12)The method of paired comparison is often used in experiments where perceptual scale values for a collection of stimuli are desired, such as in experiments analyzing image quality. Thurstone’s Case V of his Law of Comparative ... -
Electro-optical transfer function preferences for LCD TVs: The effect of display brightness and surround illumination on preferred gamma
(Society for Information Display, 2006-09)Recent commercial liquid-crystal-display (LCD) televisions are larger and brighter than traditional televisions, thus impacting the viewing conditions in which they are viewed. These changes in viewing conditions may require ... -
Application of dense microemulsions to magnetic resonance imaging
(Elsevier Science B.V., Amsterdam, 1996-09-15)Microemulsions have recently been proposed as the signal-bearing solution for use in a magnetic resonance imaging phantom. We have attempted to characterize the hydrogen nuclear spin system of paramagnetically doped water, ... -
Parametric analysis of target/decoy performance
(The International Society for Optical Engineering (SPIE), 1991-04-01)As infrared sensing technology matures and the development of space-based optical sensors becomes feasible, interest has grown in protecting both ballistic and orbiting objects from detection by optical sensors. Such ...