Results 21 to 30 of about 50,093 (261)

Inverse Nodal Problem for Polynomial Pencil of a Sturm-Liouville Operator from Nodal Parameters [PDF]

open access: yesMathematics Interdisciplinary Research, 2021
A Sturm-Liouville problem with n-potential functions in the second order differential equation and which contains spectral parameter depending on linearly in one boundary condition is considered.
Sertac Goktas, Esengul Biten
doaj   +1 more source

Two-dimensional hourglass Weyl nodal loop in monolayer Pb(ClO2)2 and Sr(ClO2)2

open access: yesNew Journal of Physics, 2022
The hourglass fermions in solid-state materials have been attracting significant interest recently. However, realistic two-dimensional (2D) materials with hourglass-shaped band structures are still very scarce.
Xin-Yue Kang   +3 more
doaj   +1 more source

Innovative Technologies for Using Satellite Imagery to Assess the Oil and Gas Potential of the Velichaevsko-Kolodeznoye Field

open access: yesНаука. Инновации. Технологии, 2022
Introduction: in the capital-intensive chain, the search for a field, its exploration, production, processing, is a huge field for innovative technologies. An important role belongs to energy resources-oil and gas.
D. V. Lapta, V. M. Kharchenko
doaj  

Unstable Points, Ergodicity and Born’s Rule in 2d Bohmian Systems

open access: yesEntropy, 2023
We study the role of unstable points in the Bohmian flow of a 2d system composed of two non-interacting harmonic oscillators. In particular, we study the unstable points in the inertial frame of reference as well as in the frame of reference of the ...
Athanasios C. Tzemos, George Contopoulos
doaj   +1 more source

Innovative technology of operational searching, exploration and development of oil and gas fields (Example of the Velichaevo-Kolodez field)

open access: yesНаука. Инновации. Технологии, 2022
The proposed work outlines the operational methods and technology of prospecting for mineral deposits and estimates of seismicity and environmental conditions based on the use of: 1. Modern satellite imagery of the earth's surface by means of a selection
Vladimir Mikhailovich Kharchenko   +3 more
doaj  

(Dis)trust, (un)sefety and Cohesion: Discourses of Vaccinations in Ukraine

open access: yesУкраїнський соціологічний журнал, 2021
The article is devoted to the analysis of vaccination discourses as ways of constructing and transforming social reality. Vaccination is considered, firstly, as a direction of state policy in the social and medical sphere; secondly, as a basis for ...
Olga Filippova, Oleksandra Deineko
doaj   +1 more source

Left-right asymmetry: Nodal points [PDF]

open access: yesJournal of Cell Science, 2003
The striking left-right asymmetry of visceral organs is known to depend on left- and right-side-specific cascades of gene expression during early embryogenesis. Now, developmental biologists are characterizing the earliest steps in asymmetry determination that dictate the sidedness of asymmetric gene expression.
openaire   +2 more sources

Mathematical Model of Drilling Mud Movement along a Shale Shaker Screen

open access: yesAdvanced Engineering Research
Introduction. When drilling oil or gas wells, rock from the bottomhole is brought to the surface by drilling mud, which is cleaned of sludge by shale shakers at the first stage.
I. Yu. Kichkar
doaj   +1 more source

Limit Weierstrass points on nodal reducible curves [PDF]

open access: yesTransactions of the American Mathematical Society, 2007
In the 1980s D. Eisenbud and J. Harris posed the following question: “What are the limits of Weierstrass points in families of curves degenerating to stable curves not of compact type?” In the present article, we give a partial answer to this question.
Esteves, Eduardo, Salehyan, Parham
openaire   +3 more sources

Computation of Trace and Nodal Points of Eigenfunctions for a Sturm-Liouville Problem with Retarded Argument

open access: yesCumhuriyet Science Journal, 2018
In this study, a formula for regularized sums of eigenvalues and nodalpoints of eigenfunctions for a discontinuous Sturm-Liouville problem with aconstant retarded argument.
Erdoğan Şen
doaj   +1 more source

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