Showing papers by "University of Mons published in 1982"
TL;DR: In this article, it was shown that the branched cation radical must be regarded as the essential intermediate in the course of the rearrangement/dissociation reaction and that the process commences with intramolecular hydrogen transfer from either C-3 or C-5 to the ionised carbonyl oxygen.
22 citations
TL;DR: In this article, it was shown that in most cases the use of a triple sector (E/B/E) mass spectrometer facilitates these experiments as interfering artefacts are suppressed.
Abstract: Molecular or fragment ions can be prepared by a large variety of reactions in the field free regions of a mass spectrometer; these reactions involve spontaneous dissociation as well as collision induced excitation of singly or doubly charged precursors. Some typical examples show the different means which can lead to a given ion and how they can be studied by collisional activation. It also appears that in most cases the use of a triple sector (E/B/E) mass spectrometer facilitates these experiments as interfering artefacts are suppressed.
22 citations
20 citations
TL;DR: In this article, the authors measured the wavelength of convective cells as a function of the width-to-height ratio in a very long apparatus (y 2 17.5) and as close as possible to the threshold of Rayleigh-Bthrard convection.
12 citations
TL;DR: In this article, two tricalcium silicate samples, one air quenched, the other by means of liquid nitrogen, show different structure defects detected by thermoluminescence Their hydration kinetics, followed by isothermal microcalorimetry and thermogravimetric analysis, point out that the fastest quenching (liquid nitrogen) induces the highest hydration rate.
12 citations
TL;DR: The tricalcium silicate annealing effect at a temperature range from 800 to 1600°C on its hydration kinetic has been studied by microcalorimetry as mentioned in this paper.
9 citations
TL;DR: In this paper, the authors investigated the energy threshold for complete transformation into AlSb as a function of pulse duration from 35 ns to 100 ms and at film temperatures ranging from -100 to 350 °C, and concluded that the reaction is thermally triggered by the laser pulse but is to some extent self-sustained via the heat of transformation which is locally distributed.
8 citations
TL;DR: In this article, a family of self-dual Yang-Mills fields in SU(2) gauge theory were obtained. But they were not shown to describe pseudoparticles with arbitrary topological numbers and action densities concentrated around the origin.
Abstract: We obtain a family of self-dual Yang-Mills fields in an SU(2) gauge theory. Some of them describe pseudoparticles with arbitrary topological numbers and with action densities concentrated around the origin.
3 citations
TL;DR: In this article, carbon analysis of carbon in thin films of platinum prepared by dc reactive sputtering in argon containing a low percentage of methane was performed using the 12C(d,p0)13C nuclear reaction.
2 citations
01 Jan 1982
TL;DR: In each case, a system of representation of reality was used which was simultaneously non-verbal, inspired by techniques used in mathematical logic, and based on an explicit convention established between the teacher and his pupils.
Abstract: We have had the opportunity of giving experimental lessons at primary level (6–12 years old) and of working first of all with problem children and afterwards with normal children. In each case, we used a system of representation of reality which was simultaneously non-verbal, inspired by techniques used in mathematical logic, and based on an explicit convention established between the teacher and his pupils. We did not always use the same system of representation, but those we did use had to act as support to the children’s thought.
2 citations
TL;DR: In this article, the secondary decomposition of fragment ions produced by electron impact of carbinolamine ethers was studied by mass analysed ion kinetic energy spectrometry and the role of a fractional positive charge localized at saturated centres in the reactivity of these gaseous organic ions was discussed.
Abstract: The secondary decomposition of fragment ions produced by electron impact of carbinolamine ethers was studied by mass analysed ion kinetic energy spectrometry. A new case was observed of ions of the same structure leading to the same fragments through different mechanisms competing in the metastable time frame and accompanied by a different partitioning of the excess energy (internal vs translational). The role of a fractional positive charge localized at saturated centres in the reactivity of these gaseous organic ions is discussed.
01 Jan 1982
TL;DR: In this article, the authors pointed out that recourse to language is a questioning process, to the extent that in any discourse held, spoken or written, there is a question at stake.
Abstract: People speak because they have a problem in mind to which they answer by resorting to language. This is the main thrust of the so-called problematological conception of language. Very few philosophers or linguists would deny, nowadays, that linguistic activity is only one particular type of human action, which, as such, should be envisaged within the general framework of human action, and that the latter should be conceptualized as problem solving. Nonetheless many of them — in spite of Collingwood — have, so far, been reluctant to draw conclusions, and they have failed to realize that recourse to language is a questioning process, to the extent that in any discourse held, spoken or written, there is a question at stake. Their attitude can be attributed to several factors. The first one to be mentioned could be named assertoric obnubilation, on the ground that assertoric discourse is to a great extent autonomous. The study of language is directed upon a phenomenon sui generis, and because of that, the theoretician is tempted to see in language an autonomized (or autonomizable) reality. Hence the old privilege granted in the analysis of language to written discourse and declarative sentences which both assert what they mean to say (Lyons, 1968).
01 Jan 1982
TL;DR: The first part of this paper is based on a lecture given by E. LINDEN during the Second Conference on Language and Language Acquisition, held at Mons in 1980 as discussed by the authors.
Abstract: The first part of this paper is based on a lecture given by E. LINDEN during the Second Conference on Language and Language Acquisition, held at Mons in 1980, The lecture itself was based on a book (in press) written by LINDEN and PATTERSON, about Koko.