Search results for "angle"
showing 10 items of 1921 documents
Protonation equilibria of some ortho-substituted and annelated aryl and thiophen-2-yl and -3-yl ketones
2001
For some phenyl- (1–8) and thiophen-2-yl (9–11) and thiophen-3-yl (12–14) ketones quantum-mechanical (PM3) calculations have been performed, and for compounds 2, 3, 5–8, 10–14 protonation equilibria have been determined. Phenyl ketones have similar values for the m* parameter and show good linear correlation between the proton affinities calculated in the gas phase and the measured pKBH+ values, which in turn parallel the trend for the calculated carbonyl–phenyl ring dihedral angle. It appears that the differences in basicity are governed essentially by “internal” factors (carbonyl–ring conjugation), while the base–conjugate acid differential solvation is not significantly affected by struc…
Els triangles amorosos i l'amor cast. Alguns paral·lelismes entre la novel·la grega antiga i ¨Tirant lo Blanc¨
2018
Malgrat la distància temporal, cultural i lingüística que separa el Tirant lo Blanch i la novel·la grega antiga, es poden establir paral·lelismes evidents en personatges, escenes i motius, pel que fa al tractament de l?amor. En el present article ens centrem en l?enamorament de la parella de protagonistes de la novel·la de Joanot Martorell i de la novel·la d?Aquil·les Taci, Leucipe i Clitofont (s. II dC), i en algunes fites pel que fa al progrés de la seva relació amorosa. A continuació, analitzem els personatges de l?emperadriu i la Viuda Reposada, amb el mirall de les dones adúlteres de les novel·les Leucipe i Clitofont i Etiòpiques, com a protagonistes dels respectius triangles amorosos…
Poetes catalanes i poetes angleses als anys d'entreguerres. A propòsit d'una antologia ja feta i una per fer
2015
L’objectiu principal d’aquest article és estudiar la poesia femenina catalana del període d’entreguerres aplicant dues metodologies: d’una banda, la literatura comparada, tot relacionant les escriptores catalanes amb les escriptores angleses del mateix període; i de l’altra banda, la crítica feminista, utilitzant alguns dels seus paradigmes. L’altre gran objectiu és reivindicar la qualitat d’algunes d’aquestes autores, com ara Roser Matheu, M. Teresa Vernet, Simona Gay, Maria Perpinyà i Cèlia Viñas, i també posar de manifest la importància que haurien de tenir en la història literària catalana contemporània.
Las prioridades de la investigación en los campus europeos
2011
[ES] Frente a la globalización, la internacionalización de la universidad es una parte esencial de la solución como factor para su desarrollo sostenible a través de estrategias de innovación abierta y por tanto una prioridad en los campus europeos bien contemplada en la reciente Ley de la Ciencia y los Campus de Excelencia Internacional como parte de la Estrategia Universidad 2015. El acceso a la financiación pública competitiva disponible en los fondos europeos es importante en términos de prioridades de investigación, precisamente en un contexto restrictivo de financiación nacional y autonómica. La atracción internacional de talento y posicionarnos en las grandes áreas de investigación pe…
Analysis of the unpredictable migration of impacted mandibular third molars: A pilot study
2020
Background Eruption of an impacted mandibular third molar (3MM) is often unpredictable. The objective of this study was to establish the radiographic parameters of migration in patients whose 3MMs evolved unpredictably. Material and Methods This was a retrospective observational study. Patients with unusual 3MM migration (away from their physiological eruption position with changes in the longitudinal and horizontal axes) and with at least two panoramic radiographs were included. To evaluate the radiographic parameters, images were superimposed, using mandibular angle and ipsilateral condyle as references. Results Of a total of 2851 patients, four were included in our study. The average age…
A new project management approach for R&D software projects in the automotive industry - continuous V-model
2017
Most current work activities in R&D centres are innovative and dynamic, with project management acting as the discipline that governs them. The improvement of PM methods has become a necessity due to the following main factors: classical methodologies are increasingly difficult to apply, cutbacks in project duration are requested by organisations and customers, demands for product quality are continuously expanding. The paper examines how PM concepts are used in developed R&D projects, based on the V-model approach. It also introduces an enhanced new approach called Continuous V-model - CVM, based on agile concepts. The model has been applied on a real automotive R&D project and the resulte…
Quand les temps du travail bousculent la mobilité du quotidien
2019
Rencontres Francophones Transport Mobilité 2019, Montréal, CANADA, 11-/06/2019 - 13/06/2019
Josephson Traveling Wave Parametric Amplifiers as Non-Classical Light Source for Microwave Quantum Illumination
2021
Abstract Detection of low-reflectivity objects can be enriched via the so-called quantum illumination procedure. In order that this quantum procedure outperforms classical detection protocols, entangled states of microwave radiation are initially required. In this paper, we discuss the role of Josephson Traveling Wave Parametric Amplifiers (JTWPAs), based on circuit-QED components, as suitable sources of a two-mode squeezed vacuum state, a special signal-idler entangled state. The obtained wide bandwidth makes the JTWPA an ideal candidate for generating quantum radiation in quantum metrology and information processing applications.
Valence electronic structure of C60: Theoretical analysis of photoemission data
1993
Abstract We present a theoretical investigation of the valence band photoemission spectra of C 60 using the nonempirical valence effective Hamiltonian (VEH) method. The VEH-DOVS curves calculated for the C 60 molecule are found to be in excellent agreement with synchrotron-radiation photoemission spectra reported for C 60 films. A detailed interpretation of all the photoemission bands is performed in the light of the VEH results.
Electric Field Generation and Control of Bipartite Quantum Entanglement between Electronic Spins in Mixed Valence Polyoxovanadate [GeV14O40]8–
2017
As part of the search for systems in which control of quantum entanglement can be achieved, here we consider the paramagnetic mixed valence polyoxometalate K2Na6[GeV14O40]·10H2O in which two electrons are delocalized over the 14 vanadium ions. Applying a homogeneous electric field can induce an antiferromagnetic coupling between the two delocalized electronic spins that behave independently in the absence of the field. On the basis of the proposed theoretical model, we show that the external field can be used to generate controllable quantum entanglement between the two electronic spins traveling over a vanadium network of mixed valence polyoxoanion [GeV14O40]8–. Within a simplified two-lev…