3 research outputs found
Développement d'un systÚme expert d'aide à l'orientation destiné à des adolescents
Des transitions « ratĂ©es » du monde scolaire au monde professionnel peuvent ĂȘtre Ă lâorigine de chĂŽmage de longue durĂ©e chez le jeune. Il y a des facteurs objectifs qui facilitent les transitions des jeunes, comme un bon systĂšme scolaire, un marchĂ© du travail favorable, le statut socio-Ă©conomique des parents. Il y a aussi des Ă©lĂ©ments subjectifs qui ont une grande importance, comme lâidentitĂ© professionnelle, la construction de reprĂ©sentations relatives aux mĂ©tiers, les intĂ©rĂȘts professionnels. A ce propos, le projet est ici de dĂ©velopper un systĂšme expert dâaide Ă lâorientation destinĂ© Ă des jeunes adolescents Ă©voluant dans des Cycles dâOrientation Genevois. Le point de dĂ©part est la typologie dâintĂ©rĂȘts RIASEC de Holland Ă partir de laquelle ont Ă©tĂ© rĂ©digĂ©es des questions et des possibilitĂ©s de rĂ©ponses intĂ©grĂ©es dans un systĂšme expert dâaide Ă lâorientation. Le systĂšme expert questionne aussi le jeune sur ses intĂ©rĂȘts professionnels plus spĂ©cifiques. Enfin, il lui propose un groupe de mĂ©tiers susceptibles de lâintĂ©resser et non pas un mĂ©tier prĂ©cis. En effet, Ă cet Ăąge, lâadolescent est dans une phase dâexploration subjective des possibilitĂ©s professionnelles. Sur le plan des rĂ©sultats concrets, le prototype a Ă©tĂ© dĂ©veloppĂ© avec succĂšs. Il a Ă©tĂ© testĂ© sur un groupe contrĂŽle et un groupe utilisant le systĂšme expert composĂ©s tous deux de cinq sujets. Les rĂ©sultats nâont pas montrĂ© une baisse significative statistique dâindĂ©cision (mesurĂ©e par le questionnaire CDQQ) suite Ă lâutilisation du systĂšme expert. Mais ces rĂ©sultats sont Ă relativiser puisque ces deux Ă©chantillons Ă©taient petits. Dâautre part, le concept dâindĂ©cision vocationnelle est peut-ĂȘtre trop abstrait pour pouvoir juger de lâefficacitĂ© du systĂšme expert
Additional file 5: figure S5. of Phosphatase ABI1 and okadaic acid-sensitive phosphoprotein phosphatases inhibit salt stress-activated SnRK2.4 kinase
Primary root growth inhibition of studied plant lines under salt stress. (PDF 229Â kb
Structural and Stability Studies of a Series of <i>para</i>-Phenylenediboronic and <i>para</i>-Hydroxyphenylboronic Acid Cocrystals with Selected Aromatic <i>N</i>âOxides
Nine new cocrystals of <i>para</i>-phenylenediboronic
or <i>para</i>-hydroxyphenylboronic acids with a series
of aromatic N-oxides are reported. All of the complexes form centrosymmetric
crystal structures. They are stabilized by an extended net of hydrogen
bonds further supported by effective Ï-stacking interactions.
In the studied structures four main synthons were distinguished. Only
in the 3,10-phenanthroline-3-<i>N</i>-oxide and 3,10-<i>N</i>,<i>N</i>-dioxide cocrystals from the series,
an acidâacid dimeric motif characteristic for arylboronic acid
crystals was observed. The majority of the obtained cocrystals exhibit
layered architectures, where the <i>N-oxide</i> molecules
are separated by boronic acid slabs. Furthermore, most of the cocrystals
form hydrates, where water molecules play the role of a âmolecular
glueâ. Water contribution to the lattice stability is significant,
and energy gain per water molecule ranges from 66.8 to 117.6 kJ·mol<sup>â1</sup>. The cocrystal cohesive energies seem to be more
favorable when compared to the corresponding values for crystals of
their components. However, the presence of various asymmetric unit
contents and numerous hydrated crystal structures indicates that the
crystallization process and the final products are highly dependent
on kinetic and entropy factors. Finally, the calculated energetic
features are compared with the experimental thermogravimetric analysisâdifferential
scanning calorimetry results obtained for selected cocrystals