Search results for "Figur"
showing 10 items of 1122 documents
Tunable and reconfigurable microwave filter by use of a Bragg-grating-based acousto-optic superlattice modulator
2005
We present an all-optical novel configuration for implementing multitap transversal filters by use of a broadband source sliced by fiber Bragg grating arrays generated by propagating an acoustic wave along a strong uniform fiber Bragg grating. The tunability and reconfigurability of the microwave filter are demonstrated.
High-spin states in tetrahedral X4 clusters (X = H, Li, Na, K)
2010
The high-spin electronic states for lithium, sodium, and potassium four-atom clusters were studied. In particular, we performed coupled cluster geometry optimization of the quintet state in tetrahedral geometry. The quintet state of these systems is characterized by having all the valence electron Unpaired, giving rise to the so-called no-pair bonding. Single-point full configuration interaction computations on the equilibrium geometries for the various Clusters are also presented. The analysis of the valence orbitals in a localized representation confirms the importance of the p atomic orbitals to explain this unusual type of bond. (C) 2009 Wiley Periodicals, Inc. Int J Quantum Chem 110: 8…
Small Clusters Made of Helium Atoms
2003
Helium atoms interact very weakly through a van der Waals potential. Nevertheless, they are able to form aggregates or drops with a small number of atoms. This work analyzes the stability of clusters made of 4He atoms, of bosonic nature, clusters made of 3He atoms, of fermionic nature and also mixed aggregates with both kinds of constituents. Some of these drops are predicted to be unstable.
Theory of glass transition in spin glasses, orientational glasses and structural glasses
2008
Theoretical concepts about the glass transition are briefly reviewed, and the test of these ideas by Monte Carlo simulations of simple lattice models is described, with an emphasis on isotropic and anisotropic orientational glasses, and the bond fluctuation model of polymer melts. It is suggested that orientational glasses do have an equilibrium phase transition at zero temperature (in d = 3 dimensions!) only, in contrast to the Ising spin glass which orders at nonzero temperature. A diverging glass correlation length is identified that is responsible for the anomalous slowing down. For the Potts glass, the divergence seems to be exponential, implying that the model is at its lower critical…
Les conditions enseignantes. Politiques éducatives, statuts sociaux et reconfigurations du travail
2018
International audience
Functional consequences of prey acclimation to ocean acidification for the prey and its predator
2016
Ocean acidification is the suite of chemical changes to the carbonate system of seawater as a consequence of anthropogenic carbon dioxide (CO2) emissions. Despite a growing body of evidences demonstrating the negative effects of ocean acidification on marine species, the consequences at the ecosystem level are still unclear. One factor limiting our ability to upscale from species to ecosystem is the poor mechanistic understanding of the functional consequences of the observed effects on organisms. This is particularly true in the context of species interactions. The aim of this work was to investigate the functional consequence of the exposure of a prey (the mussel Brachidontes pharaonis) t…
Symmetry of root and root canal morphology of mandibular incisors: A cone-beam computed tomography study
2019
Background Aim of this study was to analyze the root canal configuration in mandibular central and lateral incisors in vivo using cone-beam computed tomography (CBCT) imaging. Material and methods A total of 487 mandibular central incisors and 491 mandibular lateral incisors from 250 patients were examined using CBCT imaging, previously taken for diagnosis and treatment. The number of roots, root canal system configuration, presence of apical confluences, distance between confluences and radiographic root end, symmetry between left and right elements were recorded and statistically analyzed. Results All the examined teeth presented only one root. No significant differences were found betwee…
Nuovi paradigmi del design. Visualizzazione interattiva e configuratori di prodotto.
2015
Disegno e progetto sono legati l’un l’altro e costituiscono un sistema di pensiero in cui, da sempre, è impossibile considerarli semparatamente. Pochi ma significativi esempi: codifica dell’assonometria e produzione industriale; curve di Bezier e forme di automobili; stampanti 3D e microproduzione. Anche oggi il connubio tra sistemi di visualizzazione e web sta cambiando il modo di vedere il prodotto e i processi di progettazione. Gli esiti di questo processo sono, tra gli altri, i configuratori di prodotto, software capaci di far prevedere un oggetto e le sue declinazioni. L’introduzione dei configuratori pone interrogativi di rilievo sul delicato rapporto tra rappresentazione, design e ma…
Nuorten vankien lapsuuden väkivaltakokemukset ja heidän vanhempiensa parisuhdeongelmat
1999
Engraved in the Body: Ways of Reading Finnish People’s Memories of Mental Hospitals
2021
AbstractFinnish psychiatric practice has been heavily based on institutionalization. Mental hospitals have thus been part of Finns’ lives in many ways. Our multidisciplinary research group has investigated how experiences in these institutions are remembered today by analysing writings by patients, relatives, personnel and their children, collected in 2014–2015 with the Finnish Literature Society. The memories cover phases of psychiatric care from the 1930s to the mid-2010s. This article presents multiple ways in which experiences that are often difficult verbalize can be interpreted, e.g. by drawing on perspectives from creative, artistic and cultural studies. Collecting and archiving the …