3,361 research outputs found
A universal curve for the design of optimal dielectric elastomer generators: benefits of ceramic filler addition
No full textA Comparative Analysis of an East Sakhalin Ainu folktale collected by Bronisław Piłsudski
No full textThis contribution presents a linguistic analysis of an East Sakhalin Ainu folktale collected by Bronisław Piłsudski in 1903. The author bases their analysis on two different versions of the text, which Piłsudski compiled himself using a cyrillic-script-based and a latin-script-based transcription for Ainu. Taking into account two versions of the folktale where different scripts are used proves insightful with regards to phonetics and phonology and, thanks to Piłsudski’s painstakingly accurate transcription, allows for investigation despite the lack of a backup audio recording. Starting from Piłsudski’s originals, the author provides a re-transliteration of the text, following modern standard conventions for Ainu, and a morphemic analysis. A discussion of the most salient grammatical aspects of the informant’s language fol-lows and a comparison with neighboring West Sakhalin Ainu dialects is drawn
Vibrational properties of tetrahedral amorphous carbon from first principles
No full textWe study the vibrational properties of hydrogenated tetrahedral amorphous carbon from first principles. Our results reproduce the C density of states (DOS) measured by electron energy loss. We decompose the theoretical DOS in terms of vibrational modes of microscopic units. These partial DOS have large overlaps in frequency. Only the region between 1350 and 1600 cm(-1) is covered by a single type of stretching (sp(2)-sp(2)), whose DOS reproduces the experimental visible Raman spectra. We find a linear correlation between CH stretch frequency and CH bond length, and we show that the spreading of CH distances due to the constraints imposed by the C network is an important source of broadening of the CH stretching spectrum. (C) 1999 American Institute of Physics. [S0003-6951(99)02331-1]
Phonon dispersions: Performance of the generalized gradient approximation
No full textBy computing the phonon dispersions of a few selected solids (Si, C, Al, and Cu), within density-functional perturbation theory, we compare the performance of the local density approximation (LDA) with that of the generalized gradient approximations (GGA's) in the form recently proposed by Perdew, Burke, and Ernzerhof [Phys. Rev. Lett. 77, 3865 (1996)]. We find that GGA systematically lowers the frequencies of phonon branches with positive Gruneisen parameters. This effect is correlated with the GGA's expansion of the lattice constant, since GGA phonon frequencies computed at the experimental lattice constants are higher than the corresponding LDA ones. In C, Al, and Cu, LDA and GGA phonon dispersions have similar accuracy with respect to the experimental data. Si is an exception since the LDA phonon dispersions are already in very good agreement with experiment and GGA worsens the comparison. [S0163-1829(99)03339-1]
Adsorption geometry of benzene on Pd(110): Results of first-principles calculations
No full textThe atomic structure of the Pd(110)-c(4 x 2)-benzene system has been determined by means of ab initio slab calculations. A C-2 low-symmetry equilibrium configuration is predicted. The corresponding azimuthal angle theta similar to 11 degrees of the adsorbed molecule is partly due to lateral interactions. The aromatic ring looses planar geometry and the C-H, bonds bend away from the metal. STM images calculated for the C-2 configuration are compatible with recent experimental data
Ab initio study of CO adsorption on Ni(110): Effects on surface magnetism at low coverage
No full textThe magnetization of the Ni(110) surface is explored as a function of the CO coverage by means of periodic slab calculations within density-functional theory. The in-plane inspection of the spin density corresponding to the surface layer exhibits a CO-induced decrease in the Ni-atom magnetic moments that is limited to the atoms directly involved in the chemisorption bond. This decrease is due to interactions between the metal states and the CO orbitals that increase the population of the spin-down metal states within the outermost layer and decrease that of the corresponding spin-up ones
CO adsorbed on Cu(001): A comparison between local density approximation and Perdew, Burke, and Ernezerhof generalized gradient approximation
No full textAdsorption energetics, structural and vibrational properties of the Cu(001)-c(2 X 2)-CO system are studied with periodic slab calculations within density functional theory in the local density (LDA) and generalized gradient (GGA) approximations by using ultrasoft pseudopotentials. The recent expression of Perdew, Burke, and Ernzerhof (PBE) has been used as the GGA functional [Phys. Rev; Lett. 77, 3865 (1996)]. The fully relaxed geometry of the system is determined for different adsorption sites,of the CO molecule; unlike LDA, PBE-GGA predicts correctly the on-top adsorption site of the molecule. C-O and Cu-CO bond lengths, stretching frequencies, Cu-layer displacements, chemisorption energies, and work functions are computed under both approximations and are compared to the experimental values. LDA. gives accurate,values for the C-O equilibrium distance and the corresponding stretching frequency, while PBE-GGA better describes the adsorption bond and all the remaining properties. (C) 2001 American Institute of Physics
Polysemy and apparent polyfunctionality of the Sakhalin Ainu prefixes e- and ko-: Insights on applicativization and aspect
No full textThe present study focuses on the polysemous verbal prefixes e- and ko- of Sakhalin Ainu and proposes their analysis as markers of high transitivity. The author takes a compositional approach to argument structure and event structure in order to account for the main use of e- and ko- as applicative markers as well as for their less common use as markers of resultative-completive and intensive aspect. Ultimately, the analysis shows that the apparent polyfunctionality of e- and ko- arises from two separate applications at the syntax-semantics level of one same underlying function of the prefixes. The author also comments on how the Sakhalin Ainu case fits in with other cases of valence-aspect conceptual overlapping cross-linguistically and on the implications of his findings for Ainu studies specifically
Elements of Sakhalin Ainu Phonetics, Phonology, and Morphosyntax in Bronisław Piłsudski’s Corpus of Ainu Folklore
No full textIn this paper the author focuses on a number of linguistic features of East Sakhalin Ainu dialects. The language data for this study comes from a collection of traditional Ainu folklore elicited in 1903‐04 and published as Materials for the Study of the Ainu Language and Folklore by Bronisław Piłsudski in 1912. The observations on phonetics, phonology, and morphosyntax will be discussed in light of more recent data coming from West Sakhalin Ainu dialects collected in the 1960s‐1970s. This will allow for a brief consideration of the dialectal differences occurring between the two dialect subgroups as well as of the possible path of language development that took place during the 60‐70 years that separate the two sources. The aim of the author is to highlight how a thorough descriptive work on old sources of an indigenous, minority language like Ainu can give to East Asian historical linguistics and to linguistic typology more generally
Etica e mondo del lavoro.Organizzazioni positive, azione, responsabilità
No full textLa riflessione su etica e mondo del lavoro, condotta presso l'Università di Padova nell'ambito delle scienze filosofiche e psicologiche, si arricchisce di un nuovo contributo che fa seguito alla pubblicazione di Etica e mondo del lavoro. Razionalità, modelli, buone prassi (FrancoAngeli, 2016). I contenuti portanti di questo secondo volume sono la "positività" delle organizzazioni, l'azione e la responsabilità, la valorizzazione della persona nelle sue componenti valoriali, relazionali e applicative.
Il tema di base per le due dimensioni principali della trattazione - l'impegno vissuto dal singolo e le finalità e i contenuti dell'operare organizzativo - consiste nella consapevolezza che l'agire individuale e collettivo nelle diverse attività lavorative fa sì che ogni essere umano possa realizzarsi sempre più propriamente e compiutamente.
La dignità di ogni lavoro e la sua "trascendenza" rispetto agli impegni sia quotidiani sia protratti nel tempo innervano e danno senso comune ai diversi contributi, in una chiave di costante integrazione fra le diverse discipline
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