Search results for " Form"
showing 10 items of 4997 documents
Contrastare le difficoltà di apprendimento in matematica degli studenti stranieri nel primo ciclo di istruzione
2016
Contrastare le difficoltà di apprendimento in matematica degli studenti stranieri nel primo ciclo di istruzione
Titanocene Selenide Sulfides Revisited: Formation, Stabilities, and NMR Spectroscopic Properties
2019
[TiCp2S5] (phase A), [TiCp2Se5] (phase F), and five solid solutions of mixed titanocene selenide sulfides [TiCp2SexS5−x] (Cp = C5H5−) with the initial Se:S ranging from 1:4 to 4:1 (phases B–E) were prepared by reduction of elemental sulfur or selenium or their mixtures by lithium triethylhydridoborate in thf followed by the treatment with titanocene dichloride [TiCp2Cl2]. Their 77Se and 13C NMR spectra were recorded from the CS2 solution. The definite assignment of the 77Se NMR spectra was based on the PBE0/def2-TZVPP calculations of the 77Se chemical shifts and is supported by 13C NMR spectra of the samples. The following complexes in varying ratios were identified in the CS2 solutions of …
Spherical Top Theory and Molecular Spectra
2011
In this article, we present an overview of the present state of the art of the theory of high-resolution spherical-top spectra in the framework of the effective Hamiltonian approach. We describe the specific features of this class of molecules to explain the basic concepts of the theoretical methods used for the analysis (line positions and intensities) and the simulation of absorption (including pure rotation) and Raman spectra of such species. The non conventional formalism that we use is essentially based on irreducible tensor methods and is especially adapted to computational treatments and global analyses of complex interacting band systems. We give examples concerning mainly methane (…
Image formation with plasmonic nanostructures
2015
En 1873, Ernst Abbe concluyó que debido a la difracción de la luz el límite de resolución de un sistema óptico es aproximadamente la mitad de la longitud de onda de trabajo. Este límite, llamado el límite de difracción produce porque las ondas evanescentes no contribuyen a la formación de la imagen. En cualquier sistema óptico formado por materiales presentes en la naturaleza los detalles espaciales del objeto que sean más pequeños que el límite de resolución son transportados por ondas evanescentes. Normalmente estas ondas se pierden debido a la fuerte atenuación que experimentan viajando del objeto a la imagen. // En 1968, Veselago mostró que un material con permitividad y permeabilidad n…
Business networking strategy: operations management and organizational economics different perspectives
2008
6-Methyluracil: a redetermination of polymorph (II)
2019
6-Methyluracil, C5H6N2O2, exists in two crystalline phases: form (I), monoclinic, space group P21/c [Reck et al. (1988). Acta Cryst. A44, 417–421] and form (II), monoclinic, space group C2/c [Leonidov et al. (1993). Russ. J. Phys. Chem. 67, 2220–2223]. The structure of polymorph (II) has been redetermined providing a significant increase in the precision of the derived geometric parameters. In the crystal, molecules form ribbons approximately running parallel to the c-axis direction through N—H...O hydrogen bonds. The radical differences observed between the crystal packing of the two polymorphs may be responsible in form (II) for an increase in the contribution of the polar canonical forms…
Monitoraggio e percezione delle esperienze formative internazionali tra gli specializzandi italiani in igiene e medicina preventiva. Indagine condott…
2013
Introduzione Molti studi hanno dimostrato che le esperienze formative internazionali (International Health Electives - IHE) contribuiscono all'acquisizione di conoscenze e competenze fondamentali per i futuri professionisti in Sanità proprio attraverso l'opportunità di confronto fra sistemi sanitari e contesti socio-culturali differenti. Sebbene le IHE siano in crescita, non ci sono dati che riguardino quelle svolte dagli specializzandi italiani in Igiene. L'obiettivo dello studio è di raccogliere informazioni sulle loro pregresse esperienze formative internazionali e di comprendere motivazioni ed eventuali criticità relative alla decisione di effettuare una IHE. Materiali e metodi Gli spec…
EFFICACIA DI DISPOSITIVI FORMATIVI ELABORATIVO-RIFLESSIVI IN INTERVENTI ORIENTATI ALLO SVILUPPO DELL’IDENTITÀ PROFESSIONALE IN STUDENTI
2013
Introduzione. All’interno di un progetto relativo alla costruzione di un modello psicosociale della qualità universitaria, il contributo si centra sulla verifica di efficacia di dispositivi formativi riflessivi atti a consentire agli studenti il riconoscimento e lo sviluppo virtuoso dei loro modelli di identità, così da facilitare la costruzione di rappresentazioni di ruolo sulle quali fondare competenze idonee a dialogare con la mutevolezza, ormai strutturale, dei contesti e degli utenti delle professioni di aiuto. Obiettivi e metodi I dispositivi utilizzati, gruppi semi-direttivi di discussione, sono stati finalizzati alla esplorazione e trasformazione in chiave meno idealizzante delle ra…
Retoryka ciągłości: o dziedzictwie prawnym II Rzeczpospolitej i rządów komunistycznych
2017
The aim of the article is to establish whether the continuity between the Second and Third Polish Republics officially declared by the Polish elites is based on facts. The authors analyse the question with regard to three areas: symbolic events (handing over of the presidential insignia in 1990 and the 1998 resolution of the Senate of the Republic of Poland on legal continuity), judgements of ordinary courts and the Constitutional Court as well as legal scholarship. In their conclusion they point out that the rhetoric of continuity between the Second and the Third Polish Republics on the legal level hides real continuity between the communist regime and the normative system in force in Pol…
Poincare Inequalities and Spectral Gap, Concentration Phenomenon for G-Measures
2002
We produce a new approach based upon inequalities of Poincare’s type for giving constructive estimates of the mixing rate for a family of mixing stationary processes continuously depending on their past called g-measures. We establish also exponential inequalities of Hoeffding’s type leading to a concentration phenomenon for a large class of observables; this last property permits in particular to give the typical behaviour of the n-orbits of a g-measure.