1,721,155 research outputs found
Modular microporous minerals: cancrinite-davyne group and C-S-H phases
No full textIn this chapter, we illustrate and discuss two distinct groups of microporous phases: the
cancrinite group and the C-S-H compounds of the tobermorite and gyrolite families. The
compounds in the fi rst group present a three-dimensional purely tetrahedral framework with,
apart from a single exception, Si:Al ratio equal to 1; in the mineralogical classifi cations they
are included among feldspathoids and are generally “regarded ...... distinct from zeolites,
in part, at least, because of the presence of large volatile anions” (Coombs et al. 1998). The
members of the second group are characterized by mixed frameworks built up by silicon (and aluminum) tetrahedra and calcium polyhedra. A common feature of both groups is the modular
character of their frameworks, which are built up through various stacking ways of a single module (as in the minerals of the cancrinite-davyne family) and two or more modules as in the case of the C-S-H phases
Intervenir sur l’aphasie en contexte hospitalier: analyse des pratiques de rééducation et d’évaluation
No full textIn this paper, we analyse post-stroke aphasia speech therapy sessions taking place in the hospital setting. During the acute phase of the pathology, the objective of the session is both to give a first recovery to the patient and to evaluate the troubles issued from the stroke lesion. Using an interactional perspective, we analyse the interactive organization of different tasks performed during these sessions and show the methodical practices and resources used by the participants to accomplish them. This allows us to reflect not only on how tasks are locally and interactively realized, but also on how they affect the type of engagement exhibited by the patient and the visibility of his/her different heterogeneous competences. We finally discuss the impact this can have on the assessment of the patient's residual linguistic and cognitive abilities
Spécificités séquentielles et multimodales des recherches de mot dans des interactions avec des locuteurs aphasiques
No full textIn this paper, we look at interactions in speech and language therapy with people who have developed
aphasia following brain injury. We focus, in particular, on the phenomenon of word searches and analyse
how one of the symptoms of aphasia – that is anomia (difficulty or inability to produce words or to name
stimuli) – is managed in interaction. Using a sequential approach, we highlight some peculiarities in the
structure of these sequences, especially when the searched-for-word is ratified. Multimodal analysis
allows us to account for the central role played by visible resources in the collaborative solution of the
search, in particular by pointing gestures, which are frequently used by aphasic speakers in word search
sequences
Afasia e trattamento logopedico in contesto ospedaliero: riflessioni su norma e competenze
No full text
Superstructure of moraesite: a synchrotron study
No full textMoraesite (Lindberg et al., 1953) is a hydrated berillophosphate with ideal chemical formula Be2(PO4)(OH)·4H2O. Its structure has been known since 1992 (Merlino & Pasero, 1992) and refined in the space group C2/c, a = 8.553(6) Å, b = 12.319(6) Å, c = 7.155(8) Å, β = 97.93(9)°. The main structural feature of moraesite is the presence of large structural cavities occupied by water molecules. The latter are implicated in a complex system of hydrogen bonds where two possible hydrogen bond schemes are equally possible. Few very weak superstructure reflections were observed (Merlino & Pasero, 1992), indicating that the true unit cell of moraesite was probably three times larger, with a b parameter of 36.96 Å and space group symmetry Cc. It was suggested by the authors that the ordering of the hydrogen bond system, concerted with minor adjustments of the structure, could be responsible for the triplication of the b axis. X-ray diffraction data, more recently obtained through synchrotron radiation, confirmed the occurrence of superstructure reflections which were indexed on the basis of an unit cell with tripled b axis. The superstructure of moraesite (a = 8.572(3) Å, b = 36.971(8) Å = 3 x bsub, c = 7.153(2) Å, β = 97.72(1)°, space group Cc) was refined up to R = 0.081 for 1789 unique reflections with Fo > 4sigma(Fo) and 0.0906 for all 2088 data. The structural refinement confirmed that the triplication of the parameter b is due to the ordering of the two possible hydrogen bonding schemes.
1) Lindberg M.L., Pecora W.T. & Barbosa A.L.M. (1953) - Moraesite, a new hydrous beryllium phosphate from Minas Gerais, Brazil. American Mineralogist, 38, 1126-1133.
2) Merlino S. & Pasero M. (1992) - Crystal chemistry of beryllophosphates: The crystal structure of moraesite, Be2(PO4)(OH)·4H2O, Zeitschrift für Kristallographie, 201, 253-262
Singing in "another" language: How pronunciation matters in the organisation of choral rehearsals
No full textIn this paper, I analyse the rehearsals of a choir and focus on sequences during which participants correct and practise the pronunciation of an item. In order to sing in a choir, singers orient both to musical relevancies (such as melody, pitch and rhythm) and to the linguistic features of the words they sing (such as articulation of consonants or vowels, cutting of the syllables, accent): these features are fundamental to singing and can be the object of correction. I hereby take into consideration "second language" singing and show that, during this activity, the correction of a word pronunciation can be initiated and realised either by the director or by the singers themselves. I analyse the structure of these sequences and show their implication for the organisation of the activity and for the participatory dynamics of the rehearsals. Based on the video-recordings of the rehearsals of the choir of a music school, my analyses take into account both the audible and visible resources participants orient to; they thus contribute to a conversation analytical and multimodal perspective on the interactional and institutional activity of music rehearsals. © 2014 © 2014 Taylor & Francis
Coordination, attention visuelle et gestes professionnels dans la rééducation de l’aphasie
No full textDans cette contribution, nous nous focalisons sur des interactions entre personnes aphasiques et orthophonistes au cours des séances de rééducation de la parole. En soulignant la nature interactive et multimodale des activités thérapeutiques, notre étude se penche sur des phénomènes de coordination et d’établissement et négociation de l’attention visuelle. L’analyse porte sur une collection d’extraits dans lesquels le thérapeute sollicite le regard du patient par l’emploi de plusieurs ressources, dont des directifs qui portent sur le regard. Ces sollicitations permettent de guider l’attention visuelle envers certains éléments du contexte et de négocier des configurations participatives adéquates pour profiter des formes d’étayage offertes par le thérapeute et accomplir les tâches de manière collaborative. Nous soulignons la centralité des gestes professionnels et des ressources corporelles mobilisés par le thérapeute et nous analysons la manière dont le patient est « instruit » à voir ces ressources. En reprenant plusieurs aspects de l’œuvre de Goodwin, notre contribution souligne des pratiques interactives et socialement organisées dans lesquelles prend forme l’institution thérapeutique de traitement de l’aphasie
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