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Leila Gibradze - One of the best experts on this subject based on the ideXlab platform.

Ren Saludo - One of the best experts on this subject based on the ideXlab platform.

Claus-w. Wallesch - One of the best experts on this subject based on the ideXlab platform.

  • Language and cognition-Kurt Goldstein's theory of semantics.
    Brain and cognition, 2000
    Co-Authors: Uta Noppeney, Claus-w. Wallesch
    Abstract:

    Kurt Goldstein is regarded as one of the major proponents of the holistic movement at the beginning of the 20th century. He rejected the strong localization hypothesis in the field of aphasiology and attempted to link language disturbances to an underlying general intellectual impairment. Goldstein's criticism was based on his subtle symptomatology, his organismic biology, and his philosophical reflections. In his concept of abstract attitude Goldstein searched for a general psychological function that might explain a variety of aphasic symptoms. Abstract attitude bridges the gap between cognitive and linguistic structures. According to Goldstein, it is the basis for words to have a meaning, to be employed in a categorical sense. Since amnesic aphasics are confined to a concrete attitude, their words have lost their representational function. Although Goldstein's concept of abstract attitude is no longer used in scientific discourse, it is analyzed for its heuristic value. It led Goldstein to questions about the relation between cognition and language and to fragments of a semantic theory.

Simone Capaccioli - One of the best experts on this subject based on the ideXlab platform.

  • relation between the activation energy of the johari Goldstein β relaxation and t g of glass formers
    Physical Review E, 2004
    Co-Authors: K L Ngai, Simone Capaccioli
    Abstract:

    For glass-forming substances, we show that the ratio ${E}_{\ensuremath{\beta}}{/RT}_{g}$ can be predicted quantitatively from the coupling model. Here ${E}_{\ensuremath{\beta}}$ is the glassy state activation enthalpy of the Johari-Goldstein \ensuremath{\beta} relaxation, ${T}_{g}$ is the glass transition temperature of the \ensuremath{\alpha} relaxation, and R is the gas constant. The calculated value is in good agreement with the experimental value in many glass formers. The results locate the origin of this cross correlation between ${E}_{\ensuremath{\beta}}$ of the Johari-Goldstein \ensuremath{\beta} relaxation and ${T}_{g}$ of the \ensuremath{\alpha} relaxation, although there are some notable exceptions to this cross correlation.

Niels Boye Olsen - One of the best experts on this subject based on the ideXlab platform.

  • dielectric and shear mechanical alpha and beta relaxations in seven glass forming liquids
    Journal of Chemical Physics, 2005
    Co-Authors: Bo Jakobsen, Kristine Niss, Niels Boye Olsen
    Abstract:

    We present shear mechanical and dielectric measurements taken on seven liquids: triphenylethylene, tetramethyltetra-phenyltrisiloxane (Dow Corning 704® diffusion pump fluid), polyphenyl ether (Santovac® 5 vacuum pump fluid), perhydrosqualene, polybutadiene, decahydroisoquinoline (DHIQ), and tripropylene glycol. The shear mechanical and dielectric measurements are for each liquid performed under identical thermal conditions close to the glass transition temperature. The liquids span four orders of magnitude in dielectric relaxation strength and include liquids with and without Johari-Goldstein beta relaxation. The shear mechanical data are obtained by the piezoelectric shear modulus gauge method giving a large frequency span (10−3–104.5Hz). This allows us to resolve the shear mechanical Johari-Goldstein beta peak in the equilibrium DHIQ liquid. We moreover report a signature (a pronounced rise in the shear mechanical loss at frequencies above the alpha relaxation) of a Johari-Goldstein beta relaxation in t...