Showing papers by "University of Mons published in 1983"
TL;DR: Adaptation of the horizontal vestibulo-ocular reflex (VOR) was produced in adult cats by sustained combined sinusoidal rotation of the cat and its surroundings (fixed-field conditions) and the gain of the visually inhibited VOR diminished after training, and some relative frequency-specificity emerged.
Abstract: Ocular movements of naive and adapted cats were recorded by classical electronystagmography techniques during: (1) sinusoidal vestibular stimulation, (2) sinusoidal optokinetic stimulation, (3) sinusoidal additive visual-vestibular stimulation, and (4) sinusoidal conflicting visual-vestibular stimulation. Adaptation of the horizontal vestibulo-ocular reflex (VOR) was produced in adult cats by sustained combined sinusoidal rotation of the cat and its surroundings (fixed-field conditions). This procedure was applied for four hours for four consecutive days. On the fifth day the VOR in darkness, the OKR, the VOR in the light and the visual suppression of the VOR were studied. VOR gain decreased from day to day and some relative frequency-specificity emerged. The gain of the visually inhibited VOR also diminished after training. This change was also frequency-specific. OKN gain, tested by a set of sinusoidal rotations, was found to be virtually unchanged. In the naive cat, VOR modified by the visual stimulus (fixed or moving) could be computed by an algebraic summation of the VOR and OKR eye movement compensations. After training, the gain of the VOR in situations where the VOR was interacting with the OKR remained easily predictable by the algebraic summation of the isolated VOR and OKR compensations.
66 citations
TL;DR: In this article, chemical stabilization and hydration reactivity of beta-dicalcium silicate were discussed. But the authors focused on the effect of the stabilizing ion and not only on the nature but also on the concentration of stabilizer.
34 citations
TL;DR: The smaller the amplitude of the visual stimulus, the better the effectiveness of OKR stabilization, and the markedly amplitude-dependent the VOR system was in phase with the stimulus, whatever the frequency and the amplitude.
29 citations
TL;DR: In this article, a secondary relaxation characteristic of ionic aggregates obeys an Arrhenius type of activation, the energy of which is in inverse proportion to the ionic radius of the cation.
Abstract: Ba, Ca, Mg, and Zn short-length carboxylato-telechelic polybutadienes (Mn = 4,600) exhibit thermorheological simplicity. A secondary relaxation characteristic of ionic aggregates obeys an Arrhenius type of activation, the energy of which is in inverse proportion to the ionic radius of the cation, whereas the mean size of the ionic aggregates is proportional to it. The glass transition of the carboxy-telechelic polybutadiene is quite independent of the degree of neutralization and of the subsequent phase separation by the metal cations. The increase in cation size favors the growth of the multiplets into layered structures. Two sets of relaxation times are reported for the smallest alkaline-earth cation (Be). They suggest the existence of small multiplets unable to grow except into clusters.
27 citations
TL;DR: The FeXXV dielectronic recombination rate coefficient associated with the 1s-2p core excitation has been measured as a function of the electron temperature in the range from 0.9-3 keV from the observations of the satellite lines emitted from the Princeton large torus (PLT) tokamak plasma.
25 citations
TL;DR: In this paper, Beta-dicalcium silicates are synthesized between 1050 and 1550°C and characterized with respect to their structure defects by cathodoluminescence, thermoluminecence and E.S.R.
19 citations
TL;DR: It was concluded that the vestibular and the saccadic systems do not share the same integrator, and low doses of XDT caused a phase advance and a marked gain decrease at lower frequencies.
14 citations
01 Jan 1983
TL;DR: The Hippocratic fervour that this heroic and scientific gesture aroused has not entirely dissipated since contemporary works for the public at large — perhaps exclusively francophone — retain significant aspects of it or weave new fantasies alongside these themes.
Abstract: The myth is well known: it is dispersed throughout the apocryphal texts of the Hippocratic Collection, the Letters, Decrees and Speeches (Littre, 1861, IX, pp. 308–428; Hercher, 1871, pp. 289–318; and Putzger, 1914): the king’s invitation, the patriotism of Hippocrates, the story of his relation to Democritus,1 the role he played at the time of the plague in Athens. The Hippocratic fervour that this heroic and scientific gesture aroused has not entirely dissipated since contemporary works for the public at large — perhaps exclusively francophone — retain significant aspects of it or weave new fantasies alongside these themes (see Joly, 1966, p. ff.).
8 citations