Search results for "85"
showing 10 items of 1612 documents
Time-resolved XRD experiments for a fine description of mechanisms induced during reactive sintering
2005
The control of Mechanically Activated Field Activated Pressure Assisted Synthesis hereafter called the MAFAPAS process is the main objective to be achieved for producing nanostructure materials with a controlled consolidation level. Consequently, it was essential to develop characterization tools "in situ" such as the Time Resolved X-ray Diffraction (TRXRD), with an X-ray synchrotron beam (H10, LURE Orsay) coupled to an infrared thermography to study simultaneously structural transformations and thermal evolutions. From the 2003 experiments, we took the opportunity to modify the sample-holder in order to reproduce the better synthesis conditions of the MAFAPAS process, but without the conso…
New rotational levels in $^{186}$Re nucleus
2020
International audience; Excited levels of 186 Re have been studied using results of the single γ -ray spectra measurements following the thermal neutron capture reaction. Energies and intensities of more than 500 γ -transitions have been obtained with the high-resolution crystal diffraction spectrometer GAMS5 of ILL. Most of the obtained intense γ -transitions have been placed in the 186 Re level scheme. A number of new levels, as well as the depopulation for levels observed earlier in the 187 Re (p,d)186 Re reaction measurements have been proposed. Structure of 186 Re levels is interpreted in terms of two-quasiparticle plus rotor coupling model and compared with that of the neighbouring do…
Pattern formation in clouds via Turing instabilities
2020
Pattern formation in clouds is a well-known feature, which can be observed almost every day. However, the guiding processes for structure formation are mostly unknown, and also theoretical investigations of cloud patterns are quite rare. From many scientific disciplines the occurrence of patterns in non-equilibrium systems due to Turing instabilities is known, i.e. unstable modes grow and form spatial structures. In this study we investigate a generic cloud model for the possibility of Turing instabilities. For this purpose, the model is extended by diffusion terms. We can show that for some cloud models, i.e special cases of the generic model, no Turing instabilities are possible. However,…
Monogràfic en homenatge a Rafael l. Ninyoles: Introducció
2020
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Catalytic Enantioselective Addition of Me2Zn to Isatins
2017
Chiral α-hydroxyamide L5 derived from (S)-(+)-mandelic acid catalyzes the enantioselective addition of dimethylzinc to isatins affording the corresponding chiral 3-hydroxy-3-methyl-2-oxindoles with good yields and er up to 90:10. Furthermore, several chemical transformations were performed with the 3-hydroxy-2-oxindoles obtained.
Valencianos: El Excmo. Sr. capitan general, todas las dignas autoridades de esta capital ... acaba de secundar el glorioso alzamiento, cuya banderá t…
Signat a la fi: Carlos M. de la Torre Precedeix al tít.: Gobierno de la província de Valencia 1854 any de "la Vicalvarada"
Understanding disruptive situations in physical education : Teaching style and didactic implications
2020
Several studies have emphasized the importance of handling disruptive situations in the physical education (PE) learning environment; however, few have investigated complex disruptive situations in PE and included both teacher and student perspectives. The aims of this study, which discusses an alternative teaching style for reducing disruptive situations, were to gain a better understanding of student and teacher experiences of complex disruptive situations in PE, and to explore how the teacher handled these situations. The philosophical perspective used in this study was Rorty’s philosophical pragmatism. Methods included written narratives, interviews, observation, and video recordings o…