Ferroelectric behavior of incommensurate X2YZ4 systems - long wave component (s) of incommensurate modulation

Janez Pirnat

doi:10.1080/00150198808229464

Distribution of Undertow and Long-Wave Component Velocity Due to Random Waves

Coastal Engineering 1992 ◽

10.1061/9780872629332.066 ◽

1993 ◽

Cited By ~ 1

Author(s):

Akio Okayasu ◽

Hiroyuki Katayama

Keyword(s):

Wave Component ◽

Random Waves ◽

Long Wave ◽

Component Velocity

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Long-Wave Component in Near-Bottom Velocities Under Random Waves on a Gentle Slope

Coastal Engineering in Japan ◽

10.1080/05785634.1989.11924510 ◽

1989 ◽

Vol 32 (2) ◽

pp. 149-159 ◽

Cited By ~ 5

Author(s):

Shinji Sato ◽

Taro Isayama ◽

Tomoya Shibayama

Keyword(s):

Wave Component ◽

Random Waves ◽

Gentle Slope ◽

Long Wave ◽

Bottom Velocities

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Photoluminescent Control Ripeness of the Seeds of Plants

E3S Web of Conferences ◽

10.1051/e3sconf/202127301003 ◽

2021 ◽

Vol 273 ◽

pp. 01003

Author(s):

Mikhail Belyakov ◽

Elena Sokolova ◽

Valentina Listratenkova ◽

Nina Ruzanova ◽

Leonid Kashko

Keyword(s):

A Priori ◽

Spectral Characteristics ◽

Short Wave ◽

Luminescence Spectra ◽

Wave Component ◽

Linear Regression Models ◽

Excitation Spectra ◽

Long Wave ◽

Urgent Task ◽

Luminescent Radiation

The development of technology for objectively determining the ripeness of plant seeds is an urgent task of modern agricultural production. An alternative to existing methods is optical photoluminescent technology, which is characterized by high accuracy, selectivity, expressiveness, as well as being remote and non-destructive. The spectral characteristics of excitation and photoluminescence of wheat, oat, and corn seeds during their maturation were measured using a spectrofluorometer using a previously developed technique. It was found that during maturation, the short-wave component of the excitation spectra decreases (λs=362 nm) and the long-wave component increases (λl=485 nm). After measuring the luminescence spectra, the integral photoluminescence fluxes for long-wave and short-wave excitation, as well as their ratio, were determined. We have obtained statistically reliable linear regression models of the dependence of long-wave and short-wave photoluminescence flows on the maturation time. Based on the obtained dependencies, a technology was developed for determining the degree of physiological maturation and making decisions about harvesting ripe seeds. It includes sample preparation, excitation and registration of luminescent radiation, amplification of the received signals and their relations, obtaining information about the degree of ripeness taking into account a priori dependencies.

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Incommensurate modulated phases of the NbxTa1-xTe4 charge density wave system

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100120692 ◽

1992 ◽

Vol 50 (1) ◽

pp. 58-59

Author(s):

S. Ritchie ◽

J. C. Bennett ◽

A. Prodan ◽

F.W. Boswell ◽

J.M. Corbett

Keyword(s):

Charge Density ◽

Charge Density Wave ◽

Direct Evidence ◽

Density Wave ◽

Wave System ◽

Modulated Phases ◽

Metal Atoms ◽

Incommensurate Modulation ◽

End Members ◽

Modulation Wave Vector

A continuous sequence of compounds having composition NbxTa1-xTe4; 0 ≤ x ≤ 1 have been studied by electron diffraction and microscopy. Previous studies have shown that the end members of the series, TaTε4 and NbTε4 possess a quasi-one-dimensional character and exhibit charge density wave (CDW) distortions. In these compounds, the subcell structure is tetragonal with axes (a × a × c) and consists of the metal atoms (Nb or Ta) centered within an extended antiprismatic cage of Te atoms. At room temperature, TaTε4 has a commensurate modulation structure with a 2a × 2a × 3c unit cell. In NbTε4, an incommensurate modulation with × ∼ 16c axes is observed. Preliminary studies of the mixed compounds NbxTα1-xTε4 showed a discontinuous jump of the modulation wave vector commensurate to incommensurate when the Nb dopant concentration x, exceeded x ≃ 0.3, In this paper, the nature of the compositional dependence of is studied in greater detail and evidence is presented for a stepwise variation of . This constitutes the first direct evidence for a Devil's staircase in CDW materials.

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World Economic Crisis as a Process of Substitution of Technological Modes

Voprosy Ekonomiki ◽

10.32609/0042-8736-2009-3-26-38 ◽

2009 ◽

pp. 26-38 ◽

Cited By ~ 13

Author(s):

S. Glaziev

Keyword(s):

Economic Crisis ◽

Economic Activity ◽

Sharp Increase ◽

Energy Resources ◽

Long Wave ◽

The World ◽

World Economic ◽

Technological Mode ◽

World Economic Crisis

The article analyzes fundamental reasons for the world economic crisis in the light of global technological shifts. It proves that it is caused by the substitution of technological modes. It is shown that sharp increase and slump in stock indices and prices for energy resources are typical of the process of technological substitution which occurs regularly according to the rhythm of long-wave fluctuations of the world economic activity. The article rationalizes a package of anti-crisis measures aimed at stimulating the new technological mode. Its structure and role of the locomotive factor of the new long wave of economic growth are revealed.

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