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Academic Journal

An algorithm for finding the damping coefficients based on vibration surveys using the frequency domain decomposition (FDD) method

Authors : Andrianova Elena

Subjects: frequency domain decomposition; damping coefficient; spectral density matrix

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 17, Iss 2 (2024)

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Academic Journal

The testing of some extra accuracy schemes on the problem of the shock wave – vortex interaction

Authors : Babich Elena; Kolesnik Elizaveta

Subjects: shock wave interaction; isoentropic vortex; numerical simulation

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 17, Iss 2 (2024)

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Academic Journal

Analytical electric potentials for simulation of the multipole radiofrequency ion funnels with nonlinear profiles

Authors : Berdnikov Alexander; Masyukevich Sergey; Pomozov Timofey

Subjects: laplace equation; periodic electrodes; analytical electric field

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 17, Iss 2 (2024)

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Academic Journal

On associated homogeneous Gelfand functions

Authors : Berdnikov Alexander; Bulyanitsa Anton; Solovyev Konstantin

Subjects: associated homogeneous gelfand functions; homogeneous euler function; recurrent linear functional relations

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 17, Iss 2 (2024)

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Academic Journal

Transformation of the structure of thin metal films upon activation of their ability to low-voltage electron emission

Authors : Bizyaev Ivan; Karaseov Platon; Karabeshkin Konstantin

Subjects: thin films; low-field electron emission; film dewetting

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 17, Iss 2 (2024)

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Academic Journal

The formation of single-domain gallium phosphide buffer layers on a silicon substrate without the use of migration enhanced epitaxy technique

Authors : Fedorov Vladimir; Fedina Sergey; Kaveev Andrey

Subjects: heterostructure; molecular beam epitaxy; buffer layer

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 17, Iss 2 (2024)

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Academic Journal

Formulation of the Lorentz transformation equations in the three dimensions of space

Authors : Khadka Chandra

Subjects: frame of reference; lorentz transformation; space contraction

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 17, Iss 2 (2024)

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Academic Journal

Derivation of the Klein – Gordon – Fock equation from first principles

Authors : Lipovka Anton; Andrianarijaona Vola; Davis Colton

Subjects: klein – gordon – fock equation; schrödinger equation; sturm – liouville problem

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 17, Iss 2 (2024)

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Academic Journal

The ways to form fullerens structure exemplified by С28 and С30 isomers

Authors : Matvienko Aleksandra

Subjects: dimer; isomer; symmetry

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 17, Iss 2 (2024)

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Academic Journal

Discussion of plasma focus parameters and gain/loss energy ‎processes for a designed plasma focus device

Authors : Nassif Alaa; Sahyouni Walid; Zeidan Ola

Subjects: dense plasma focus; ‎‏ lee code; ‎‎ line emission

Source: St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol 17, Iss 2 (2024)

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