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Effects of Turbid Media Optical Properties on Object Visibility in Subsurface Polarization Imaging
(The Optical Society of America, 2006-08)
, and anisotropy on image visibility were examined. Both linearly and circularly polarized light were used in the imaging. Three different types of target were investigated: scattering, absorption, and reflection. The experimental results indicate that target...
Applying the Polarization Memory Effect in Polarization-gated Subsurface Imaging
(The Optical Society of America, 2006-05)
Polarization memory is a well established phenomenon occurring when circularly polarized light propagates in turbid media of larger particles. Recent studies have demonstrated that the circularly crosspolarized imaging can significantly improve...
Expression of Target Optical Properties in Subsurface Polarization-gated Imaging
(The Optical Society of America, 2005-05)
We examined the expression of target optical properties in subsurface polarization imaging under linearly and circularly polarized illumination. Reflecting, scattering, and absorption targets were imaged in tissue mimic phantoms. The polarization...
Dynamics of extended spinning masses in a gravitational field
(American Physical Society, 2006)
We develop a first-order approximation method for the influence of spin on the motion of extended spinning test masses in a gravitational field. This approach is illustrated for approximately circular equatorial motion in the exterior Kerr spacetime...
Supercell studies of the Fermi surface changes in the electron-doped superconductor LaFeAsO1‑xFx
(American Physical Society, 2008)
We study the changes in the Fermi surface with electron doping in the LaFeAsO1‑xFx superconductors with density-functional supercell calculations using the linearized augmented plane-wave method. The supercell calculations ...
The Multitude of Molecular Hydrogen Knots in the Helix Nebula
(Institute of Physics, 2005)
. The brightest H2 emission (~3 × 10-4 ergs s-1 cm-2 sr-1) may be enhanced by a larger than unity area filling factor of H2 knots or may be an individual H2 knot exposed to direct starlight, causing rapid photoevaporation compared with the more embedded knots...
Gravitoelectromagnetism
(arXiv, 2000)
Gravitoelectromagnetism is briefly reviewed and some recent developments in this topic are discussed. The stress-energy content of the gravitoelectromagnetic field is described from different standpoints. In particular, ...
The Hypothesis of Locality and its Limitations
(arXiv, 2003)
The hypothesis of locality, its origin and consequences are discussed. This supposition is necessary for establishing the local spacetime frame of accelerated observers; in this connection, the measurement of length in a ...
The gravitomagnetic clock effect and its possible observation
(arXiv, 2006)
The general relativistic gravitomagnetic clock effect involves a coupling between the orbital motion of a test particle and the rotation of the central mass and results in a difference in the proper periods of two ...
VLT / Infrared Integral Field Spectrometer Observations of Molecular Hydrogen Lines in the Knots in the Planetary Nebula NGC 7293 (the Helix Nebula)
(2008)
Large Telescope at high spatial resolution (50-125 mas). With spatially resolved 2 micron spectra, we find that the H2 rotational temperature within the cometary knots is uniform. The rotational-vibrational temperature of the cometary knot (situated...
Mueller Matrix Decomposition of Diffuse Reflectance Imaging in Skeletal Muscle
(The Optical Society of America, 2009-05)
Propagation of polarized light in skeletal muscle is significantly affected by anisotropic muscle structures. To completely characterize muscle polarization properties, we acquired the whole Mueller matrix images of the ...
X-Ray and Radio Interactions in the Cores of Cooling Flow Clusters
(American Astronomical Society, 2000)
We present high-resolution ROSAT X-ray and radio observations of three cooling Ñow clusters containing steep-spectrum radio sources at their cores. All three systems exhibit strong signs of interaction
between the radio ...
General Relativistic Theory of Light Propagation in the Field of Radiative Gravitational Multipoles
(arXiv, 2005)
The extremely high precision of current radio/optical interferometric observations and the unparalleled sensitivity of existing (LIGO) and future (LISA, ASTROD) gravitational-wave detectors demand a much better theoretical ...
Optical properties of dust
(arXiv, 2008)
Except in a few cases cosmic dust can be studied in situ or in terrestrial laboratories, essentially all of our information concerning the nature of cosmic dust depends upon its interaction with electromagnetic radiation. ...
Gravitomagnetic effects in the propagation of electromagnetic waves in variable gravitational fields of arbitrary-moving and spinning bodies
(arXiv, 2001)
Propagation of light in the gravitational field of self-gravitating spinning bodies moving with arbitrary velocities is discussed. The gravitational field is assumed to be "weak" everywhere. Equations of motion of a light ...
Drumming for the Divine : A Female Tympanon Player from Cyprus
(University of Missouri--Columbia. Museum of Art and Archaeology, 2002)
"Musical performance is an integral part of many cultural events. Artistic representations, as well as literary sources, provide evidence that music created a joyous atmosphere during celebrations, promoted a spiritual ...
Imaging 2D Optical Diffuse Reflectance in Skeletal Muscle
(The Optical Society of America, 2007-04)
We discovered a unique pattern of optical reflectance from fresh prerigor skeletal muscles, which can not be described using existing theories. A numerical fitting function was developed to quantify the equiintensity ...
Post-Newtonian Reference Frames for Advanced Theory of the Lunar Motion and a New Generation of Lunar Laser Ranging
(arXiv, 2009)
We construct a set of post-Newtonian reference frames for a comprehensive study of the orbital dynamics and rotational motion of Moon and Earth by means of lunar laser ranging (LLR) with the precision of one millimeter. ...
The baths of Trajan Decius, or of Philip the Arab?
(2002)
In a recent publication Laetitia La Follette collected the evidence for the Baths of Trajan Decius, an important but little-known imperial monument of the mid-3rd c. in Rome. Bringing together the ancient literary and ...
Horseman in Bronze : A Belt from Urartu
(University of Missouri--Columbia. Museum of Art and Archaeology, 2005)