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Thursday, July 23, 2020 | History

2 edition of Low frequency scattering by spheroids and discs found in the catalog.

Low frequency scattering by spheroids and discs

J. S. Asvestas

Low frequency scattering by spheroids and discs

by J. S. Asvestas

  • 287 Want to read
  • 31 Currently reading

Published by Office of Research Administration in Ann Arbor, MI .
Written in English

    Subjects:
  • Scalar field theory.,
  • Neumann problem.,
  • Dirichlet problem.,
  • Scattering (Mathematics)

  • Edition Notes

    StatementJ. S. Asvestas and R. E. Kleinman
    SeriesUniversity of Michigan. College of Engineering. Dept. of Electrical Engineering. Radiation Laboratory. Scientific report -- no. 4
    ContributionsKleinman, Ralph Ellis., Air Force Cambridge research Laboratories (U.S.)
    Classifications
    LC ClassificationsQA"433"A88
    The Physical Object
    Pagination102 l. :
    Number of Pages102
    ID Numbers
    Open LibraryOL20055794M

      High throughput (HT) standardized method for generation, imaging and analysis of tumor spheroids.(a) Ultra-low attachment (ULA) well round-bottomed plates were used to generate suspension cultures of reproducibly sized, single spheroids in each well.(b) Fully automated imaging and analysis was carried out on a Celigo cytometer using the Colony Cited by:   Spheroids is the latest iteration in a long history of games riffing on the bubble-popping arcade classic, Pang. Eclipse Games attempts to add some variety with platforming and goofy humour, but.

    Define spheroid. spheroid synonyms, spheroid pronunciation, spheroid translation, English dictionary definition of spheroid. Here, we choose the spheroid to represent the nonspherical mineral aerosol in order to study the scattering cross sections of nonspherical particles within the Gaussian beam incidence. Figure 3. Spheroids generated in microwell plates. Spheroids were formed from seven hundred (A, C, E) or one thousand five hundred (B, D, F) HT29 colon cancer cells (A, B), LNCaP prostate cancer cells (C, D) or TE6 esophageal cancer cells (E, F). Note the consistency of spheroids within a preparation, and also the variation between cell lines Cited by: 7.

    Multicellular tumor spheroids are one of the classic 3D culture models that can be applied to the development of anticancer drugs and treatments. By mimicking the 3D network of the cellular–matrix and cell–cell interactions, tumor spheroids resemble many aspects of the pathophysiologic environment within human tumor tissue. About Low Frequency Resonances of Elastic Spheroidal Shells, Irradiating and Establishing by Harmonic and Pulse Signals. And here the picture is repeated: the area under the curve 2 (8,1) C = s found maximum. So we cocsude that the low frequency resonances of the elastic oscillations may be determined with the help of integral and angular.


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Low frequency scattering by spheroids and discs by J. S. Asvestas Download PDF EPUB FB2

It can be shown Low-Frequency Scattering (Dassios and Kleinman, ) that for an impedance surface r~ = Re I IE+fi'EI2ds' Zs S and for a lossy penetrable scatterer ~a=krlZ, Im ft.

(VxE-)xE-* ds Low frequency scattering by spheroids and discs book ~-Z + [ IEdv. to, v- (48) (49) Finally, the extinction cross section Ge is defined as the sum of the scattering and the absorption cross Cited by: Analytical solutions to acoustic scattering problems involving spheroids and disks have long been known and have many applications.

However, these solutions require special functions that are not easily computable. Therefore, their asymptotic forms are typically used instead since they are more readily available. In this paper, these solutions are explored, and computational software Cited by: 6. tackle scattering problems for spheroids having large aspect ratios, in the fi eld of a zeroth-order Bessel beam.

Numerical computations are performed with particular emphasis on the half-cone. Semi-analytical computation of acoustic scattering by spheroids and disks Ross Adelman,a),b) Nail A. Gumerov,c) and Ramani Duraiswamib),c) Institute for Advanced Computer Studies, University of Maryland, College Park, College Park, Maryland [email protected], [email protected], [email protected]   In this study, the authors use the partial-wave series expansion method in the spherical coordinate system and provide a theoretical formula for the off-axis acoustical scattering by rigid prolate and oblate spheroids illuminated by an arbitrary-order Bessel beam to explore the physical characteristics of the off-axis far-field scattering (the axis of the Bessel beam is Cited by: 1.

Polarized Scattered Light Intensities from Small Spheroids Oriented by a High Frequency Electric Field RAYMOND S. FARINATO Department of Chemistry, University of Massachusetts, Amherst, Massachusetts Received Febru ; accepted Aug The polarized components of the intensity of light scattered by a system of small rigid spheroids oriented by Cited by: 6.

smarties: user-friendly codes for fast and accurate calculations of light scattering by spheroids ille,é, The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria.

The point source excitation acoustic scattering problem by a multilayer isotropic and homogeneous spheroidal body is presented. The multilayer spheroidal body is reached by an acoustic wave emanated by an external point source.

The core spheroidal region is inpenetrable and rigid. The exterior interface and the interfaces separating the interior layers are by: A wide-angle on-surface radiation condition applied to scattering by spheroids Article in The Journal of the Acoustical Society of America (3) September with 5 Reads.

Non-spherical aerosol retrieval method employing light scattering by spheroids O. Dubovik,1,2 B. Holben,1 T. Lapyonok,1,3 A. Sinyuk,1,2 M. Mishchenko,4 P. Yang,5 and I. Slutsker1,3 Received 4 December ; revised 5 February ; accepted 8 February ; published 24 May [1] Numerous studies indicate the need to account for particle.

scattering problems involving prolate spheroids, oblate spheroids, and disks. This software is called scattering and runs in MATLAB. We have also developed software for computing the spheroidal wave functions required by scattering. This software is called spheroidal and is described in a separate paper [13].

Using spheroidal, we have. The electromagnetic vector fields, which are scattered off a highly conductive spheroid that is embedded within an otherwise lossless medium, are investigated in this contribution. A time-harmonic magnetic dipolar source, located nearby and operating at low frequencies, serves as the excitation primary field, being arbitrarily orientated in the three-dimensional by: 1.

In writing this chapter, an unpublished summary by Gerald C. Lauchle, a book and tables by C. Flammer (), and a paper by G. Chertock () were very helpful. The author is greatly obliged to Mr. Lauchle for having computed the curves shown in Figs.

2 and 3, and for permission to reproduce parts of Chertock ’s paper: Sound Radiation from Prolate Spheroids, J. A., Cited by: 1. Scattering center models provide a simple and effective way of describing the complex electromagnetic scattering phenomena of targets and have been successfully applied in radar applications.

However, the existing models are limited to conducting objects. Numerical results show that scattering centers of dielectric objects are far more complex than conducting objects Cited by: 2. Light scattering characteristics of spheroidal particles are studied for a wide range of particle parameters and orientations.

The method of computation is based on the scattering theory for a homogeneous spheroid developed by us, and the calculation is extended to fairly large spheroidal particles of a size parameter up to Effects of the particle size, shape, index of refraction.

SOUND SCATTERING BY RIGID OBLATE SPHEROIDS, WITH IMPLICATION TO PRESSURE GRADIENT MICROPHONES Algirdus Muciduitis, John M. Seiner, and Thomus D. Norzcm Laagley Reseurch Center Hdmpton, Vu.

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON, 0. MAY Spheroids with vertical rotational axes oblate prolate; A spheroid, or ellipsoid of revolution, is a quadric surface obtained by rotating an ellipse about one of its principal axes; in other words, an ellipsoid with two equal semi-diameters.A spheroid has circular symmetry.

If the ellipse is rotated about its major axis, the result is a prolate (elongated) spheroid, shaped like an American. Routines for computing the analytical solutions to acoustic scattering problems involving prolate spheroids, oblate spheroids, and disks.

- radelman/scattering. Spheroids A spheroid is a three-dimensional shape that can look like either a stretched or a flattened sphere. A spheroid is the shape that is traced out by rotating an ellipse about one of its two main axes.

If the ellipse is rotated about its major axis, the resulting spheroid is called a prolate spheroid, and it looks something like a rugby ball or an American football. Debye series for light scattering by a spheroid Feng Xu,1,* James A. Lock,2 and Cameron Tropea1 1Fachgebiet Strömungslehre und Aerodynamik, Technische Universität Darmstadt, Petersenstra e 30, Darmstadt, Germany 2Department of Physics, Cleveland State University, Cleveland, OhioUSA *Corresponding author: [email protected] Received.

Scattering by a Coated Dielectric Spheroid Without any loss of generality the incident plane can be taken to be the x -z plane (i = 0), with the incident propagation vector ko making an angle Bi with the z -axis.

The polarization angle /k is the angle between the direction of the incident electric field intensity and the direction of the normal to the plane.M.

F. R. Cooray, I. Ciric / Scattering by systems of spheroids where (r)M/1l and 'j are column matrices whose elements are prolate spheroidal vector wave functions of the first kind, expressed in terms of the coordinates in the r th spheroidal system, and the corresponding known expansion coefficients, respectively.

The mold was quickly warmed (5 s on a hotplate) to reach 37–40 °C and low-gelling agarose ( mL, 2% wt/vol in deionized water) was slowly dispensed on the side of the mold to seal the by: