Results 1 to 10 of about 1,217 (178)

The Radiation Problem of a Submerged Oblate Spheroid in Finite Water Depth Using the Method of the Image Singularities System

open access: yesFluids, 2022
This study examines the hydrodynamic parameters of a unique geometry that could be used effectively for wave energy extraction applications. In particular, we are concerned with the oblate spheroidal geometry that provides the advantage of a wider impact
Ioannis Chatjigeorgiou   +1 more
exaly   +3 more sources

Tending to the Facial Surfaces of a Mathematical Biology Head-Scratcher: Why Does the Head of the Sea Turtle Natator depressus Resemble a Convex Zygomorphic Dodecahedron? [PDF]

open access: yesAnimals
Two convex polyhedra that markedly resemble the head of the flatback sea turtle hatchling are identified. The first example is a zygomorphic tetragonal dodecahedron, while the other, an even better matching structure, is a related tetradecahedron, herein
David A. Becker
doaj   +2 more sources

The forward problem of magnetometry for the oblate spheroid

open access: yesContributions to Geophysics and Geodesy, 2011
We present analytical solution of the forward magnetometric problem for the oblate spheroid (rotational ellipsoid) as a causative body. The shorter semiaxis of the ellipsoid is supposed to be vertical to the surface of the earth.
Milan HVOŽDARA, Ján VOZÁR
doaj   +2 more sources

Stability of the Sitnikov's circular restricted three body problem when the primaries are oblate spheroid

open access: yesBibechana, 2014
The Sitnikov's problem is a special case of restricted three body problem if the primaries are of equal masses (m1 = m2 = 1/2) moving in circular orbits under Newtonian force of attraction and the third body of mass m3 moves along the line perpendicular
RR Thapa
doaj   +3 more sources

Electro-optic response of bipolar nematic liquid crystal confined in oblate spheroid

open access: yesFrontiers in Soft Matter, 2022
Electro-optic response of liquid crystals (LCs) relies on the molecular reorientation of LCs under external electric field and is important for a wide spectrum of applications.
Chenjing Yang   +9 more
doaj   +1 more source

The Method of Image Singularities Employed for Oscillating Oblate Spheroids under a Free Surface

open access: yesFluids, 2020
The main objective of this study is to develop a semi-analytical formulation for the radiation problem of a fully immersed spheroid in a liquid field of infinite depth.
Eirini I. Anastasiou   +2 more
doaj   +1 more source

Pollen micromorphology of some species of Gagea in Iran and its taxonomic implication [PDF]

open access: yesرستنی‌ها, 2023
Pollen grains of eight species of Gagea were examined using Light Microscope (LM) and Scanning Electron Microscope (SEM). Results showed that selected quantitative characters of pollen grains (polar axis, equatorial axis, P/E ratio, width of muri, lumina
Leila Rastegari Khah   +2 more
doaj   +1 more source

Modeling long-term volcanic deformation at Kusatsu-Shirane and Asama volcanoes, Japan, using the GNSS coordinate time series

open access: yesEarth, Planets and Space, 2021
Long-term deformation of Kusatsu-Shirane and Asama volcanoes in central Japan were investigated using Global Navigation Satellite System (GNSS) measurements.
Hiroshi Munekane
doaj   +1 more source

Ultimate Image Singularities in Oblate Spheroidal Coordinates with Applications in Hydrodynamics

open access: yesJournal of Marine Science and Engineering, 2020
This study exploits the Touvia Miloh oblate spheroid theorem with a special focus on hydrodynamical applications. The theorem provides explicit relations that express the oblate spheroidal harmonics, given in terms of the fundamental solutions of the ...
Ioannis K. Chatjigeorgiou   +3 more
doaj   +1 more source

Effects of shape on the optical properties of CdSe@Au core-shell nanocomposites

open access: yesAIP Advances, 2023
We studied the local field enhancement factor (LFEF), absorption, and extinction cross sections of spherical, cylindrical, oblate, and prolate core–shell nanocomposites (NCs) theoretically and numerically using the quasi-static approach.
Garoma Dhaba Bergaga   +2 more
doaj   +1 more source

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