Results 1 to 10 of about 957,985 (202)

Temperature phase transitions in Rb2KRe3+F6 elpasolites - Raman spectroscopy study

open access: yesMaterials and Devices, 2021
Phase transitions in crystals of fluorine-containing elpasolites are investigated by Raman scattering spectroscopy. It was found that lattice instabilities in these crystals are induced by soft mode condensations, while restorations of these modes in ...
Alexander N VTYURIN   +5 more
doaj   +6 more sources

Customization of two-dimensional extremal materials

open access: yesMaterials & Design, 2022
Extremal materials are elastic metamaterials with rank-deficient elasticity tensor. Due to this novel property of the elasticity tensor, extremal materials (especially pentamode materials) show outstanding performance in various wave manipulation ...
Ming Cai   +3 more
doaj   +1 more source

MODULATIONAL INSTABILITY OF THE RADIAL VIBRATIONS OF CORONAL LOOPS

open access: yesСовременная наука и инновации, 2022
Axisymmetric modes in coronal loops are used to interpret observed fast microwave and hard x-ray pulsations. Their properties are well studied in the approximation of linear magnetic hydrodynamics.
Galina Alekseevna Mankaeva   +3 more
doaj   +1 more source

Vibrations of straight pipes/beams with two-sided stops: Analytical and numerical analyzes

open access: yesForces in Mechanics, 2021
The impacts on pipes or beams are of fundamental mechanical interest. These impacts can be studied analytically. This makes it easier to examine the basic effects and to compare these effects with the results of finite element analyzes (FEA).
H. Schau, T. Hermann, W. Hienstorfer
doaj   +1 more source

Influence of the parameters of magnetic abrasive treatment on the surface roughness of carbide tools [PDF]

open access: yesМеталознавство та обробка металів, 2019
Considered the influence of the modes of magnetic-abrasive treatment using a ball magnetic-abrasive tool on the roughness of the working surfaces of the multifaceted non-retractable hard-alloy plates.
Bobyn A.B.   +2 more
doaj   +1 more source

Research on the typical fault modes of multi-category aviation transformer rectifier units

open access: yesHangkong gongcheng jinzhan, 2023
With the development of multi-electric aircraft, the researches on the structure improvement and fault di-agnosis of aviation transformer rectifier units (TRUs) are increasing, but research on the characteristics and effects of typical fault modes of ...
CHEN Shuwen, YU Nalun
doaj   +1 more source

Lyapunov Modes and Time-Correlation Functions for Two-Dimensional Systems [PDF]

open access: yes, 2005
The relation between the Lyapunov modes (delocalized Lyapunov vectors) and the momentum autocorrelation function is discussed in two-dimensional hard-disk systems. We show numerical evidence that the smallest time-oscillating period of the Lyapunov modes
Morriss, Gary P., Taniguchi, Tooru
core   +3 more sources

Entrance skin dose of the thyroid gland area following exposure with different protocols of two panoramic and cone-beam computed tomography devices

open access: yesJournal of Oral and Maxillofacial Radiology, 2019
Background: Cone-beam computed tomography (CBCT) has gained considerable use, while radiation burden remains an important concern. Aims: This study aimed at determining the entrance skin dose of the thyroid gland area through exposure with the normal ...
Bardia Vadiati Saberi   +5 more
doaj   +1 more source

Parametric resonance at the critical temperature in high energy heavy ion collisions [PDF]

open access: yes, 2001
Parametric resonance in soft modes at the critical temperature ($T_{c}$) in high energy heavy ion collisions is studied in the case when the temperature ($T$) of the system is almost constant for a long time. By deviding the fields into three parts, zero
A. Dumitru   +15 more
core   +2 more sources

Delocalized nonlinear vibrational modes and their effect on the properties of binary NiTi alloy [PDF]

open access: yesИзвестия высших учебных заведений: Прикладная нелинейная динамика
The purpose of this work is to investigate the behavior of stable one-component delocalized nonlinear vibrational modes in simple cubic titanium and nickel sublattices, as well as their influence on the properties of the binary NiTi alloy. Methods.
Bachurin , Dmitry Vladimirovich   +1 more
doaj   +1 more source

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