Results 11 to 20 of about 65,019 (298)

To the question of the method of calculating the volume of amphoras [PDF]

open access: yesArchaeoastronomy and Ancient Technologies, 2020
The article describes the methods for calculating the volume of amphoras used by modern archaeologists, and proposes a new fairly accurate method for calculating the volume of antique sharp-pointed amphoras using the example of narrow-necked light-clay ...
Vodolazhskaya, L.N.
doaj   +1 more source

Seed Silhouettes as Geometric Objects: New Applications of Elliptic Fourier Transform to Seed Morphology

open access: yesHorticulturae, 2022
Historically, little attention has been paid to the resemblance between seed silhouettes to geometric figures. Cardioid and derivatives, ellipses, heart curves, lemniscates, lenses, lunes, ovals, superellipses, waterdrops, and other figures can be used ...
Emilio Cervantes   +6 more
doaj   +1 more source

Design of Metasurface with Nanoslits on Elliptical Curves for Generation of Dual-Channel Vector Beams

open access: yesNanomaterials, 2021
The manipulations of nanoscale multi-channel vector beams (VBs) by metasurfaces hold potential applications in various important fields. In this paper, the metasurface with two sets of nanoslits arranged on elliptic curves was proposed to generate the ...
Xiaorong Ren   +10 more
doaj   +1 more source

Normal pullout bearing characteristics of inclined strip anchor plate in sand

open access: yesYantu gongcheng xuebao, 2023
For the inclined burial anchor plate, the researches on the influences of inclination angle on the bearing characteristics are insufficient, and the coupling effects of inclination angle and burial depth controlling the bearing mechanism are also not ...
HU Wei 1, 2, ZHANG Hanlin 1, 2, MENG Jianwei 1, 2, LIU Shunkai 2, 3, NIE Zhihong 3
doaj   +1 more source

« Dispositifs de cohésion grammaticale dans "Ourania" de Le Clézio »

open access: yesمجلة الدراسات الإنسانية والأدبية, 2021
Un texte n'est pas seulement une suite de mots et de phrases, il est aussi une certaine disposition matérielle soumise à des critères par lesquels le texte acquiert sa légitimité textuelle : y compris la cohésion grammaticale.
د/ محمد أحمد سيد حمزه
doaj   +1 more source

Construction of both Geometric Relationships of Ellipses and Parabola-bounded Regions in Geometric Placement Problems [PDF]

open access: yesJournal of Mechanical Engineering, 2020
Currently, there is a significant growth of interest in the practical problems of mathematically modeling the placement of geometric objects of various physical natures in given areas.
Mykola I. Hil, Volodymyr M. Patsuk
doaj   +1 more source

Comparison of Seed Images with Geometric Models, an Approach to the Morphology of Silene (Caryophyllaceae)

open access: yesTaxonomy, 2023
Seed morphological description is traditionally based on adjectives, which originated from the comparison with other shapes, including geometric figures.
José Javier Martín-Gómez   +4 more
doaj   +1 more source

Ellipses Percolation [PDF]

open access: yesJournal of Statistical Physics, 2017
We define a continuum percolation model that provides a collection of random ellipses on the plane and study the behavior of the covered set and the vacant set, the one obtained by removing all ellipses. Our model generalizes a construction that appears implicitly in the Poisson cylinder model of Tykesson and Windisch.
Augusto Teixeira, Daniel Ungaretti
openaire   +3 more sources

Poster ELLIPSE - ECOMONDO 2023

open access: yes, 2023
<p><strong>Challenge: </strong>Ensuring the efficient use of natural resources and enhancing the valorisation and management of the increasing volume of waste generated thus reducing the volumes of landfilled waste, decreasing soil ...
ELLIPSE Consortium
core   +1 more source

Investigation of the Change of Acoustic Pressure in an Element of Acoustic Barrier with an Elliptical Shape

open access: yesAcoustics, 2022
In the presented article we have investigated the variation of the sound pressure level in characteristic areas around an element of an acoustic barrier with an elliptical shape at different frequencies (from 100 Hz to 2000 Hz).
Krasimir Nedelchev   +3 more
doaj   +1 more source

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