Results 261 to 270 of about 82,121 (307)
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Negative-Mode Soft-Tissue Xeroradiography
Radiology, 1977Positive-mode xeroradiography is an excellent method of visualizing soft-tissue structures in mammography and other procedures; however, toner deletions over a large area may preclude adequate delineation of the soft tissues near high-density structures such as bone.
F A, Osterman +5 more
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Physics Letters A, 2004
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Soft phonon mode and mode coupling in SbSI
Solid State Communications, 1970Abstract In ferroelectric SbSI the soft mode behaviour is studied by means of Raman scattering. It is observed that coupling occurs between the soft mode and a lower-frequency mode which leads to level repulsion between the two Γ 1 one-phonon states and intensity between the modes.
G. Harbeke, E.F. Steigmeier, R.K. Wehner
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Charge density glass dynamics – Soft potentials and soft modes
Physica B: Condensed Matter, 2012An universal fingerprint of glasses has been found in low-temperature thermodynamic properties of charge/spin density wave (C/SDW) systems. Deviations from the well-known Debye, elastic continuum prediction for specific heat (flat Cp/T3 plot) appear as two anomalies ; the upturn below 1 K and a broad bump at T~10 K (named Boson peak in glasses).
Biljaković, K. +6 more
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Soft Law as a New Mode of Governance
SSRN Electronic Journal, 2011The paper analyses soft law as a mode of EU governance. European soft law can be qualified as a relatively ‘new’ mode, notably due to its dramatic proliferation and the increasing involvement of private actors. The concept of ‘soft law’ is viable on the premiss that normativity may be graduated (‘the continuum view’).
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Soft modes in ferroelectric superlattices
Ferroelectrics, 1990Abstract A phenomenological theory of periodic ferroelectric multilayers, consisting of two alternating ferroelectrics with different transition temperatures, is presented. We consider the case of a ferroelectric phase transition of first order. Interface modes are shown to exist, resulting from the special form of the inhomogeneous polarization ...
D. Schwenk, F. Fishman, F. Schwabl
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The soft-mode ferroelectric effect
Ferroelectrics, 1988Abstract In this paper a presentation is given of some of the basic physics of the soft-mode ferroelectric effect, along with its experimental background. Further, possible applications in electrooptic devices are elucidated. A fast (sub-microsecond) electrooptic switching can be achieved in the A* phase, and in similar orthogonal smectic phases made ...
G. Andersson +5 more
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Ferroelectrics, 1974
Neutron scattering experiments have clarified that successive phase transitions of CsPbCl3 at 47°C, 42°C and 37°C are basically associated with the condensation of rotational modes of PbCl6 octahedra around the three principal axes. The phase transition at 47°C is caused by the condensation of the M3 phonon mode.
Y. Yamada +4 more
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Neutron scattering experiments have clarified that successive phase transitions of CsPbCl3 at 47°C, 42°C and 37°C are basically associated with the condensation of rotational modes of PbCl6 octahedra around the three principal axes. The phase transition at 47°C is caused by the condensation of the M3 phonon mode.
Y. Yamada +4 more
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Soft mode behavior in RbH2AsO4
Physics Letters A, 1973Abstract The low frequency xy Raman spectra of RbH2AsO4 are reported as a function of temperature in the paraelectric phase and are fitted to a coupled damped harmonic oscillator model to yield the soft mode behavior of the ferroelectric model.
R.C. Leung, R.P. Lowndes, N.E. Tornberg
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Soft Modes in Molecular Crystals
The Journal of Chemical Physics, 1971The self-consistent phonon approximation is applied to study the temperature dependence of the libron and phonon modes for simple molecular crystals. Several linear chain models are studied to illustrate the soft mode behavior of these excitations near the orientational order—disorder transitions that occur in many molecular crystals.
J. C. Raich, R. D. Etters
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