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Prolate - Crossref

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Last Updated: 03 June 2022

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Gravitational Collision of Small Nonspherical Particles: Swept Volumes of Prolate and Oblate Spheroids in Calm Air

"Abstract" means "aggregation rate of ice crystals varies according to their size and intercrystal relative velocity. Unlike spherical particles, the nonspherical ones can have various orientations relative to the gravitational force in the vertical direction and can face each other at various angles. In addition, the descent rate of such particles could deviate from that of vertical direction velocity. The swept volumes were measured and compared to those of equivalent volume spheres, assuming that the particles are Stokesian prolate and oblate spheroids of various heights and aspect ratios. Since the collision process is nonlinear, we expect that the collision rate between nonspherical particles is much higher than that of equivalent volume spheres. These findings show that a stichier sphere's simplistic approach to estimation of the collision rate could result in significant mistakes. ".

Source link: https://doi.org/10.1175/jas-d-20-0336.1


An Efficient Computational Technique for the Electromagnetic Scattering by Prolate Spheroids

"In this paper, we present an effective Matlab estimation of a 3-D electromagnetic scattering problem in which a plane wave impinges with a general direction toward a nimble ellipsoid of revolution. " "We have designed a fast and ad hoc code to solve the electromagnetic scattering problem, using spheroidal vector wave functions, which are special functions used to describe physical problems in which a prolate or oblate spheroidal reference system is considered. ".

Source link: https://doi.org/10.3390/math10101761


Algebraic structure underlying spherical, parabolic, and prolate spheroidal bases of the nine-dimensional MICZ–Kepler problem

"The non-relativistic motion of a charged particle around a dyn in space time is identified as the nine-dimensional McIntosh/U2013Zwanzigeru2013Kepler problem. " We find a correlation between the variable separation and the SO symmetry's algebraic structure. Each of the spherical, parabolic, or prolate spheroidal bases has been found to be a series of eigenfunctions of a related nonuplet of algebraically independent integrals of motion. ".

Source link: https://doi.org/10.1063/5.0087703


Characteristics of the wake of an inclined prolate spheroid in uniform shear flow

"Flow around an inclined 5:2 prolate spheroid with the incidence angle u03b1 = 45u00b0 is numerically determined in a single shear flow. " At Re= 480, 600, 700, and 750, the Reynolds number is based on the inflow center velocity U c and the volume-equivalent sphere diameter D e of the spheroid. With increasing shear rate, the wake transition is mitigated in general. With increasing the shear rate and Reynolds number, the time-averaged drag/lift coefficients and the Strouhal number increase. The effects of a sign-change of the incidence angle of the prolate spheroid on wake evolution are also investigated. In the wake of inclined non-axisymmetric bluff bodies in a shear flow, a physical investigation of the relationship between inclined non-axisymmetric bluff bodies and the amount of inlet shear is presented.

Source link: https://doi.org/10.1063/5.0085270


Molecular architecture of the prolate head of bacteriophage T4

"The head of bacteriophage T4 is a prolate icosahedron with one distinct portal vertex to which the phage tail is attached. For the midsection, the T4 capsid has a hexagonal surface lattice, characterized by the triangulation number T end = 13 laevo for the icosahedral caps and T mid = 20. Hexamers of the vertex protein gene product 23* and pentamers of the vertex protein gp24*, as well as the outer surface proteins with high antigenic outer capsid protein and small outer capsid protein are prominent in the reconstruction. ".

Source link: https://doi.org/10.1073/pnas.0400444101


Strong alignment of prolate ellipsoids in Taylor–Couette flow

"We report on the mobility and orientation of finite-size, neutrally buoyant, prolate ellipsoids in Taylor's u2013Couette flow using interface-resolved numerical simulations. " The flow regimes investigated were the well-known Taylor vortex, wavy vortex, and turbulent Taylor vortex flow regimes. Modes are expected in the Taylor vortex flow regime, while mode embraces both the wavy vortex and turbulent Taylor vortex flow regimes. Mode corresponds to stable orbits away from the vortex cores in a stable orbit. particles become trapped in the Taylor vortex cores, notably in a narrow Ta region. With two primary findings, we find the particle clustering for this mode to be size-dependent. Secondly, the Ta range for which clustering is observed varies depending on the particle size. We observe particles in this mode that correspond strongly to the local cylinder tangent. This observation is found to closely match a minimum of axial vorticity at the Taylor vortex core, and we explain why. ".

Source link: https://doi.org/10.1017/jfm.2021.1134


Numerical realization of diffuse sound pressure fields using prolate spheroidal wave functions

"A diffuse sound field is traditionally described as a zero-mean circularly symmetric Gaussian random field. " Such a generalized diffuse sound field can represent a random collection of sound fields that share gross measurements, such as modal density and total absorption, but not otherwise have any potential arrangement of local wave scattering features. "This is the case of generating realizations or Monte Carlo samples of a conventional diffuse sound field, or, in other words, the basic diffuse sound field's mode shapes are discussed here. ".

Source link: https://doi.org/10.1121/10.0009764


Multiline singularities applied to low‐frequency scattering by a prolate spheroid

A non-u2010dissipative dielectric prolate spheroid is derived, and "Building on the Rayleigh" u2010Stevenson strategy's fictitious internal source distributions blamed for the leading near-field contribution of the long wavelength scattering by a non-u2010field spheroid are derived. The resulting quantitative depletion of the volume polarization in the spheroid can be viewed as either extended multipoles or directly as shortened multipoles in the case.

Source link: https://doi.org/10.1108/03321649710172789


Localization of Separate Genetic Loci for Reduced Sensitivity towards Small Isometric-Headed Bacteriophage sk1 and Prolate-Headed Bacteriophage c2 on pGBK17 from Lactococcus lactis subsp. lactis KR2

"The mechanism of reduced sensitivity to the small isometric-headed bacteriophage sk1 encoded on a 19-kilobase Hpa II fragment subcloned from Lactococcus lactis subsp. pKR223 of Lactococcus lactis subsp. The reduced sensitivity to phage sk1 was due to a modest limitation/modification scheme that was not operational against prolate-headed phage c2. The R/M system against sk1 and the abortive phage infection mechanism against phage c2 were then localized by restriction mapping, subcloning, and deletion analysis. The Abi phenotype against phage c2 was localized to a region with a 1. 3-kb Eco RI fragment. Attempts to clone the c2 Abi gene independent of the sk1 R/M device were unsuccessful, showing that expression of the abi genes required sequences upstream of the modification gene. pgK17 transformants displayed the R/M device against phage sk1 but lost the Abi mechanism against phage c2," according to another reviewer.

Source link: https://doi.org/10.1128/aem.55.10.2702-2709.1989

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions