Search results for "Reso"

Deep-learning based reconstruction of the shower maximum X max using the water-Cherenkov detectors of the Pierre Auger Observatory

2021

The atmospheric depth of the air shower maximum $X_{\mathrm{max}}$ is an observable commonly used for the determination of the nuclear mass composition of ultra-high energy cosmic rays. Direct measurements of $X_{\mathrm{max}}$ are performed using observations of the longitudinal shower development with fluorescence telescopes. At the same time, several methods have been proposed for an indirect estimation of $X_{\mathrm{max}}$ from the characteristics of the shower particles registered with surface detector arrays. In this paper, we present a deep neural network (DNN) for the estimation of $X_{\mathrm{max}}$. The reconstruction relies on the signals induced by shower particles in the groun…

Multiple forms of stakeholder interaction in environmental management: business arguments regarding differences in stakeholder relationships

2010

This study describes and interprets differences in stakeholder interaction as rhetorically constructed in environmental reports and in interviews with environmental managers. It also interprets the role of the natural environment among stakeholders, and discusses how that role is justified or not justified. The study focuses in a business perspective on stakeholder interaction in environmental management. Characteristically, stakeholder studies of environmental management have concentrated on stakeholder influence or the creation of stakeholder management models. In contrast to those, the present study identifies different types of stakeholder relationships: power-based, collaborative, conf…

I Secreti della signora Isabella Cortese. Edición crítica

2021

La investigación llevada a cabo para la tesis doctoral tiene como objetivos elaborar una edición crítica del libro de 1565 de I secreti della signora Isabella Cortese, indagar sobre la autoría del libro y verificar la existencia de Isabella Cortese y contrastar el resultado de nuestro trabajo con la bibliografía publicada sobre este punto. Además de un estudio léxico de glosarios de medidas, instrumental, animales, léxico médico, minerales, plantas, ungüentos y técnicas de elaboración imprescindible para la comprensión tanto para los expertos de varias disciplinas, como la botánica, la química o la geología, como para los estudiosos de la filología italiana. The research carried out for the…

Chaining in interpreted interaction : Finnish Sign Language interpreting in an English-medium educational setting

2016

Interaction is always multimodal. Multimodality means that meanings are conveyed by using different semiotic resources, such as language, gestures, facial expressions, written text and pictures. Even though it is considered that also interpreted interaction is multimodal, this aspect of the interpreters’ work is often neglected in research and focus on how interpreters utilize multimodality in their work is called for. In this study one English-medium lecture that is interpreted into Finnish Sign Language is analyzed. The lecture’s duration is approximately one hour. The focus is on one multimodal phenomenon: chaining. Chaining means that different semiotic resources are utilized, for examp…

Luminescence properties induced by sintering of silica nanoparticles

2014

The effect of sintering on the optical properties of silica nanoparticles, a mean diameter of ~14 nm, are investigated by absorption and luminescence experiments. The sintering is induced by a thermal treatment of 1000 °C for 272 hours; after that the sample is transparent, and emits a bright luminescence under UV excitation. Time resolved photoluminescence spectra excited by a tunable laser source allows to evidence four bands around 2.0 eV, 2.4 eV, 2.7 eV and 3.4 eV, peculiar to defects induced by the sintering.

Luminescenza risolta in tempo del non bridging oxygen hole center in silice: proprietà di volume e di superficie

2007

10-keV X-ray irradiation effects on phosphorus doped fibers and preforms: electron spin resonance and optical studies

2009

Resonance Raman of oxygen dangling bonds in amorphous silicon dioxide

2017

We investigate the origin of a resonance Raman band induced by ionizing radiation in amorphous silicon dioxide (silica glass), which can be detected under ultraviolet laser excitation. A silica sample, rich of oxygen-excess related defects, was prepared by treating some length of a pure-silica-core multimode fiber in an O2 atmosphere (at high temperature and pressure) and by irradiating it with X-rays at 10 MGy(SiO2) dose. A micro-Raman study revealed a gaussian band peaking at 896 cm−1 with a full width at half maximum of 32 cm−1, which could be detected by exciting the sample with the 325-nm line of a HeCd laser. This spectral feature is absent in the Raman spectra performed with the 442-…

Localized surface plasmon resonance in silver nanoparticles: Atomistic first-principles time-dependent density-functional theory calculations

2015

We observe using ab initio methods that localized surface plasmon resonances in icosahedral silver nanoparticles enter the asymptotic region already between diameters of 1 and 2 nm, converging close to the classical quasistatic limit around 3.4 eV. We base the observation on time-dependent density-functional theory simulations of the icosahedral silver clusters Ag$_{55}$ (1.06 nm), Ag$_{147}$ (1.60 nm), Ag$_{309}$ (2.14 nm), and Ag$_{561}$ (2.68 nm). The simulation method combines the adiabatic GLLB-SC exchange-correlation functional with real time propagation in an atomic orbital basis set using the projector-augmented wave method. The method has been implemented for the electron structure…

Time resolved emission at 1.3 μm of a single InAs quantum dot by using a tunable fibre Bragg grating

2013

Photoluminescence and time resolved photoluminescence from single metamorphic InAs/GaAs quantum dots (QDs) emitting at 1.3 mu m have been measured by means of a novel fibre-based characterization set-up. We demonstrate that the use of a wavelength tunable fibre Bragg grating filter increases the light collection efficiency by more than one order of magnitude as compared to a conventional grating monochromator. We identified single charged exciton and neutral biexciton transitions in the framework of a random population model. The QD recombination dynamics under pulsed excitation can be understood under the weak quantum confinement potential limit and the interaction between carriers at the …