Search results for "ESA"

A second strain gradient elasticity theory with second velocity gradient inertia – Part II: Dynamic behavior

2013

Abstract This paper is the sequel of a companion Part I paper devoted to the constitutive equations and to the quasi-static behavior of a second strain gradient material model with second velocity gradient inertia. In the present Part II paper, a multi-cell homogenization procedure (developed in the Part I paper) is applied to a nonhomogeneous body modelled as a simple material cell system, in conjunction with the principle of virtual work (PVW) for inertial actions (i.e. momenta and inertia forces), which at the macro-scale level takes on the typical format as for a second velocity gradient inertia material model. The latter (macro-scale) PVW is used to determine the equilibrium equations …

Real título de Lugarteniente General de la Orden de Montesa para el Marqués de Angulo, Cavallero de la misma Orden, a 1 de Julio de 1756.

Sig. [ ]2 Reclams. - Cristus. - Capital grav

"Identification of mixed bromidochloridotellurate anions in disordered crystal structures of (bdmim)2[TeX2Y4] (X, Y = Br, Cl; bdmim = 1-butyl-2,3-dim…

2013

Abstract The discrete mixed [TeBrxCl6−x]2− anions in their disordered crystal structures have been identified by using the phases prepared by the reaction of 1-butyl-2,3-dimethylimidazolium halogenides (bdmim)X with tellurium tetrahalogenides TeX4 (X = Cl, Br) as examples. Homoleptic (bdmim)2[TeX6] [X = Cl (1), Br (2)] and mixed (bdmim)2[TeBr2Cl4] (3), and (bdmim)2[TeBr4Cl2] (4) are formed depending on the choice of the reagents, and their crystal structures have been determined by single-crystal X-ray diffraction. The coordination environments of tellurium in all hexahalogenidotellurates are almost octahedral. Because of the crystallographic disorder, the mixed [TeBr2Cl4]2− and [TeBr4Cl2]2…

Public awareness about depression and its treatment options

2021

Šobrīd, līdz ar COVID-19 pandēmiju, aktuāla ir depresijas tematika, tiek novērota iedzīvotāju garīgās veselības pasliktināšanās, pandēmijas ierobežojumu dēļ. Bakalaura darba mērķis bija noskaidrot iedzīvotāju informētību par depresiju kā tādu, tās ārstēšanas metodēm un sekām. Tika izmantota kvalitatīva pētniecības metode – anketēšana. Tika noskaidrots, ka Latvijas iedzīvotāju informētība par depresiju, tās ārstēšanas metodēm un sekām, ir vidēja, un, to vajadzētu uzlabot, lai tādējādi mazinātos ar depresiju asociētie aizspriedumi un cilvēki, kas izjūt depresijas simptomus, vērstos pēc palīdzības.

Should TiO2 nanostructures doped with Li+ be used as photoanodes for photoelectrochemical water splitting applications?

2017

[EN] Different TiO2 nanostructures, nanotubes and nanosponges, were obtained by anodization of Ti under stagnant and hydrodynamic conditions. Samples were doped with Li+ before and after annealing at 450 degrees C during 1 h. The nanostructures were characterized by different microscopy techniques: Field Emission Scanning Electron Microscopy (FE-SEM) and Raman Confocal Laser Microscopy. Additionally, Incident Photon-to-electron Conversion Efficiency (IPCE), photoelectrochemical water splitting and stability measurements were also performed. According to the results, TiO2 nanostructures doped before annealing present the worst photocurrent response, even if compared with undoped samples. On …

Lateral Fusion of Chemical Vapor Deposited N = 5 Armchair Graphene Nanoribbons

2017

Bottom-up synthesis of low-bandgap graphene nanoribbons with various widths is of great importance for their applications in electronic and optoelectronic devices. Here we demonstrate a synthesis of N = 5 armchair graphene nanoribbons (5-AGNRs) and their lateral fusion into wider AGNRs, by a chemical vapor deposition method. The efficient formation of 10- and 15- AGNRs is revealed by a combination of different spectroscopic methods, including Raman and UV−visnear-infrared spectroscopy as well as by scanning tunneling microscopy. The degree of fusion and thus the optical and electronic properties of the resulting GNRs can be controlled by the annealing temperature, providing GNR films with o…

High photodegradation and antibacterial activity of BN–Ag/TiO 2 composite nanofibers under visible light

2018

To develop material with good photocatalytic properties for organic compound degradation and bacterial removal, we produced Ag/TiO2 and BN–Ag/TiO2 composite nanofibers that included controlled amounts of boron nitride (BN) nanosheets and silver (Ag). After annealing at 500 °C under air, we used scanning electron microscopy, transmission electron microscopy, Brunauer–Emmet–Teller analysis, X-ray diffraction, energy-dispersive X-ray spectroscopy, Raman spectroscopy, UV-visible reflectance spectroscopy and room temperature photoluminescence to investigate the morphological, structural and optical properties of all samples. The photocatalytic tests using methylene blue under visible light, in r…

IL CANTIERE DEL COMPLESSO CARMELITANO DELL’ANNUNZIATA A TRAPANI NELLA SECONDA METÀ DEL CINQUECENTO

2016

Il complesso carmelitano dell’Annunziata a Trapani, costituito dalla chiesa e dal convento annesso (oggi sede del Museo Regionale Agostino Pepoli), appare come un’architettura fortemente stratificata, frutto di una lunga e complessa vicenda progettuale che si snoda dal XIV secolo fino alla metà del Settecento. Il presente studio intende contribuire alla conoscenza del cantiere dell’Annunziata nella seconda metà del Cinquecento, un periodo ancora poco indagato dalle ricerche finora condotte sulla fabbrica, offrendo in particolare alcune riflessioni sui maestri impegnati nella costruzione del complesso architettonico, a partire dall’esame della documentazione relativa alla gestione amministra…

Exact non-Markovian dynamics of Gaussian quantum channels: Finite-time and asymptotic regimes

2018

We investigate the Markovian and non-Markovian dynamics of Gaussian quantum channels, exploiting a recently introduced necessary and sufficient criterion and the ensuing measure of non-Markovianity based on the violation of the divisibility property of the dynamical map. We compare the paradigmatic instances of Quantum Brownian motion (QBM) and Pure Damping (PD) channels, and for the former we find that the exact dynamical evolution is always non-Markovian in the finite-time as well as in the asymptotic regimes, for any nonvanishing value of the non-Markovianity parameter. If one resorts to the rotating wave approximated (RWA) form of the QBM, that neglects the anomalous diffusion contribut…

Diffusion Acceleration in Randomly Switching Sawtooth Potential

2005

We investigate an overdamped Brownian motion in symmetric sawtooth periodic potential switched by Markovian dichotomous noise between two configurations. The two configurations differ each other by a translation of half of period. The calculation of the effective diffusion coefficient is reduced to the mean first‐passage time problem, and we obtain the exact expression valid for arbitrary mean rate of switchings and arbitrary intensity of white Gaussian noise. We find the area at parameters plane where acceleration of diffusion in comparison with the free diffusion case takes place.