Search results for "armo"
showing 10 items of 1364 documents
Elektro-optiski aktīva organiska materiāla orientēšanas dinamikas pētījumi, izmantojot plakanparalēlus elektrodus
2019
Pēdējā desmitgadē par perspektīvu risinājumu informācijas pārvades ātruma palielināšanai tiek uzskatīta elektronisko komponenšu aizstāšana ar fotoniskām integrālajām shēmām (FIS), kuru attīstībai nepieciešami jauni materiāli ar specifiskām īpašībām. Viena no materiālu klasēm, kas varētu rast pielietojumu FIS pagatavošanā, ir organiskie materiāli. Lai tos varētu izmantot ierīces izgatavošanā, organiskajiem materiāliem jāatbilst noteiktām tehnoloģiskām prasībām. Darbā aplūkoti fizikālie procesi, kas notiek, veicot vienu no FIS pagatavošanas tehnoloģiskajiem soļiem - stiklveida organisko materiālu orientēšanu ārējā elektriskā laukā. Lai pētītu šī procesa dinamiku un efektivitāti, darbā izmanto…
Persoonallisuuden piirteiden ja tunteiden säätelystrategioiden yhteydet työn imuun 50-vuotiailla
2011
Tämän tutkimuksen tarkoituksena oli selvittää persoonallisuuden piirteiden ja tunteiden säätelystrategioiden yhteyksiä työn imuun. Tutkimuksessa tarkasteltiin persoonallisuuden piirteistä ulospäinsuuntautuneisuutta ja neuroottisuutta sekä tunteiden säätelystrategioista tilanteen uudelleen arviointia ja tunteiden tukahduttamista. Ensinnäkin kiinnostuksen kohteena oli ulospäinsuuntautuneisuuden ja neuroottisuuden merkitys työn imun ja sen eri ulottuvuuksien eli tarmokkuuden, omistautumisen ja uppoutumisen kokemiselle. Toiseksi tutkimuksessa selvitettiin, ovatko uudelleen arviointi ja tunteiden tukahduttaminen yhteydessä työn imuun tai sen eri ulottuvuuksiin sen jälkeen, kun persoonallisuuden …
Vibrational Spectrum of HXeSH revisited : Combined computational and experimental study
2020
Vibrational spectrum of HXeSH embedded in low-temperature matrix is experimentally studied. To support the spectrum interpretation, anharmonic vibrational analysis is performed using different models and basis sets and the data is compared with previous experimental and theoretical analyses. Computations of overtones and combination modes allowed for new band assignments. The HXeSH molecule exhibits high anharmonicity similarly as other molecules from the noble-gas hydride family. Comparison of the employed computational methods shows once again that the modelling of the noble-gas compounds faces theoretical challenges to yield quantitatively reliable results. peerReviewed
Ghost stochastic resonance in FitzHugh–Nagumo circuit
2014
International audience; The response of a neural circuit submitted to a bi-chromatic stimulus and corrupted by noise is investigated. In the presence of noise, when the spike firing of the circuit is analysed, a frequency not present at the circuit input appears. For a given range of noise intensities, it is shown that this ghost frequency is almost exclusively present in the interspike interval distribution. This phenomenon is for the first time shown experimentally in a FitzHugh-Nagumo circuit.
Shape staggering of midshell mercury isotopes from in-source laser spectroscopy compared with density-functional-theory and Monte Carlo shell-model c…
2019
Neutron-deficient Hg177-185 isotopes were studied using in-source laser resonance-ionization spectroscopy at the CERN-ISOLDE radioactive ion-beam facility in an experiment combining different detection methods tailored to the studied isotopes. These include either α-decay tagging or multireflection time-of-flight gating for isotope identification. The endpoint of the odd-even nuclear shape staggering in mercury was observed directly by measuring for the first time the isotope shifts and hyperfine structures of Hg177-180. Changes in the mean-square charge radii for all mentioned isotopes, magnetic dipole, and electric quadrupole moments of the odd-A isotopes and arguments in favor of I=7/2 s…
Even harmonic pulse train generation by cross-polarization-modulation seeded instability in optical fibers
2012
International audience; We show that, by properly adjusting the relative state of polarization of the pump and of a weak modulation, with a frequency such that at least one of its even harmonics falls within the band of modulation instability, one obtains a fully modulated wave at the second or higher even harmonic of the initial modulation. An application of this principle to the generation of a 80-GHz optical pulse train with high extinction ratio from a 40-GHz weakly modulated pump is experimentally demonstrated using a nonzero dispersion shifted fiber in the telecom C band.
Biharmonic obstacle problem: guaranteed and computable error bounds for approximate solutions
2020
The paper is concerned with a free boundary problem generated by the biharmonic operator and an obstacle. The main goal is to deduce a fully guaranteed upper bound of the difference between the exact minimizer u and any function (approximation) from the corresponding energy class (which consists of the functions in $H^2$ satisfying the prescribed boundary conditions and the restrictions stipulated by the obstacle). For this purpose we use the duality method of the calculus of variations and general type error identities earlier derived for a wide class of convex variational problems. By this method, we define a combined primal--dual measure of error. It contains four terms of different natu…
The linearized Calderón problem for polyharmonic operators
2023
In this article we consider a linearized Calderón problem for polyharmonic operators of order 2m (m ≥ 2) in the spirit of Calderón’s original work [7]. We give a uniqueness result for determining coefficients of order ≤ 2m − 1 up to gauge, based on inverting momentum ray transforms. peerReviewed
The Hajłasz Capacity Density Condition is Self-improving
2022
We prove a self-improvement property of a capacity density condition for a nonlocal Hajlasz gradient in complete geodesic spaces with a doubling measure. The proof relates the capacity density condition with boundary Poincare inequalities, adapts Keith-Zhong techniques for establishing local Hardy inequalities and applies Koskela-Zhong arguments for proving self-improvement properties of local Hardy inequalities. This leads to a characterization of the Hajlasz capacity density condition in terms of a strict upper bound on the upper Assouad codimension of the underlying set, which shows the self-improvement property of the Hajlasz capacity density condition. Open Access funding provided than…