Results 231 to 240 of about 132,191 (247)

Scattering Functions of Semiflexible Polymers with and without Excluded Volume Effects

Macromolecules, 1996
Off-lattice Monte Carlo simulations on semiflexible polymer chains with and without excluded volume interactions have been performed. The model used in the simulations is a discrete representation of the worm-like chain model of Kratky and Porod applied in the pseudocontinuous limit.
Jan Skov Pedersen, Peter Schurtenberger
openaire   +1 more source

Computed Point Spread Functions for Light in Tissue Using a Measured Volume Scattering Function

1988
Optical techniques are increasingly being used in the field of medicine in areas as diverse as surgery (for cutting and coagulation), cancer treatment (through photoradiation therapy) and blood flow monitoring (by laser doppler measurements). At University College, we are using the technique of near infrared spectroscopy (nirs) to monitor changes in ...
P, van der Zee, D T, Delpy
openaire   +2 more sources

Characteristics of the optical volume scattering function of sea water

Journal of the Oceanographical Society of Japan, 1970
The volume scattering function, σ(ϕ), was observed for unpolarized green light near 5300 A in a variety of water bodies over a wide range of scattering angle, ϕ. These data, includingin situ values measured to an extreme foward angle of 0.2o, permit a statistical study of parameters describing the shape of the σ(ϕ) curve and provide detailed ...
openaire   +1 more source

Determination of the volume scattering function of aqueous particle suspensions with a laboratory multi-angle light scattering instrument

Applied Optics, 2012
We describe a methodology for determining the volume scattering function β(ψ) of aqueous particle suspensions from measurements with a laboratory multi-angle light scattering instrument called DAWN (Wyatt Technology Corporation). In addition to absolute and angular calibration, the key component of the method is the algorithm correcting for reflection ...
Babin, Marcel, Stramski, Dariusz, Reynolds, Rick, Wright, Vanessa, Leymarie, Edouard   +4 more
openaire   +2 more sources

Volume scattering function measurement error: effect of angular resolution of the nephelometer

Applied Optics, 1990
The finite angular resolution of nephelometers causes systematic measurement error of the volume scattering function. For scattering angles 90 degrees the error also depends on the attenuation of light in seawater and the instrument size. For nephelometers with angular resolution of ~2 degrees , in clean ocean waters the error may assume a negative ...
openaire   +2 more sources

Mueller matrix imaging of targets in turbid media: effect of the volume scattering function

Applied Optics, 2003
Detecting objects in turbid media by use of just radiance signals has been a subject of study for many years. The use of Mueller matrix imaging methods has only recently been used as a tool for target detection. We will show not only that can targets still be detected by Mueller matrix methods even after their detection has escaped normal radiance ...
George W, Kattawar, Deric J, Gray
openaire   +2 more sources

Volume scattering properties of glass particles as a function of size and absorption coefficient

IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development, 2002
The albedo and nadir incident polarized BRDF were measured at /spl lambda/=633 nm for five different Schott glasses. Measurements were acquired using a polarized goniometer and a Minolta spectrophotometer. The Schott glass samples were in the form of particles which were obtained by crushing Schott glass plates with known absorption coefficient and ...
C.L. Betty, A.K. Fung, S. Tjuatja
openaire   +1 more source

Evaluating Realistic Volume Scattering Functions on Underwater Imaging System Performance

2008
Abstract : The Navy has a continuing and pressing need to improve its ability to visually detect and identify underwater objects. As far as imaging environments go, this is one of the worst: absorption and scattering by the water and the dissolved and particulate within rob a system of its signal and blur the resulting image. Sophisticated systems like
Alan Weidemann, Deric J. Gray
openaire   +1 more source

Spectral variations in the volume scattering function at large angles in natural waters

Journal of the Optical Society of America, 1974
The quasi-single-scattering approximation in which a δ function replaces the forward portion of the volume scattering function is applied to radiative transfer in the ocean. Immediately beneath the surface, the product of the reflectance R and the downwelling irradiance-attenuation coefficient K(−) is equal to an integral of the volume scattering ...
openaire   +1 more source

Research progress in the calibration method of the volume scattering function measurement technique

National Remote Sensing Bulletin, 2023
Cong LIU, Cai LI
openaire   +1 more source