Search results for "automatic"
showing 10 items of 730 documents
Solar neutrino spectroscopy in Borexino
2018
International audience; In more than ten years of operation, Borexino has performed a precision measurement of the solar neutrino spectrum, resolving almost all spectral components originating from the proton-proton fusion chain. The presentation will review the results recently released for the second data taking phase 2012–2016 during which the detector excelled by its unprecedentedly low background levels. New results on the rate of pp, 7Be, pep and 8B neutrinos as well as their implications for solar neutrino oscillations and metallicity are discussed.
Increasing the Astrophysical Reach of the Advanced Virgo Detector via the Application of Squeezed Vacuum States of Light
2019
Current interferometric gravitational-wave detectors are limited by quantum noise over a wide range of their measurement bandwidth. One method to overcome the quantum limit is the injection of squeezed vacuum states of light into the interferometer's dark port. Here, we report on the successful application of this quantum technology to improve the shot noise limited sensitivity of the Advanced Virgo gravitational-wave detector. A sensitivity enhancement of up to 3.2±0.1 dB beyond the shot noise limit is achieved. This nonclassical improvement corresponds to a 5%-8% increase of the binary neutron star horizon. The squeezing injection was fully automated and over the first 5 months of the thi…
The advanced Virgo longitudinal control system for the O2 observing run
2020
Following a successful period of data-taking between 2006 and 2011, the Virgo gravitational-wave detector was taken offline for a major upgrade. The changes made to the instrument significantly increased the complexity of the control systems and meant that an extended period of commissioning was required to reach a sensitivity appropriate for science data-taking. This commissioning period was completed in July of 2017 and the second-generation Advanced Virgo detector went on to join the Advanced LIGO detectors in the O2 science run in August of the same year. The upgraded detector was approximately twice as sensitive to binary neutron star mergers as the first-generation instrument. During …
Convergence Analysis of Extended Kalman Filter for Sensorless Control of Induction Motor
2015
This paper deals with convergence analysis of the extended Kalman filters (EKFs) for sensorless motion control systems with induction motor (IM). An EKF is tuned according to a six-order discrete-time model of the IM, affected by system and measurement noises, obtained by applying a first-order Euler discretization to a six-order continuous-time model. Some properties of the discrete-time model have been explored. Among these properties, the observability property is relevant, which leads to conditions that can be directly linked with the working conditions of the machine. Starting from these properties, the convergence of the stochastic state estimation process, in mean square sense, has b…
Real Time Localization Systems for autonomous navigation: Modelling, Analysis and Control
2021
Questo lavoro di tesi riguarda la derivazione di osservatori ibridi dello stato, analisi e controllo, di sistemi di localizzazione e navigazione in tempo reale (RTLS). In particolare, il framework dei sistemi ibridi è stato utilizzato per tener conto delle dinamiche continue e discrete coinvolte nel processo di stima e della natura sporadica e tempo randomica delle misure provenienti da vari sensori di distanza e/o inerziali. Analisi di convergenza sono state effettuate per dimostrare la stabilità delle soluzioni proposte e la capacità di filtraggio dei rumori presenti nelle misure. Il presente lavoro è corredato dai risultati delle prove sperimentali di laboratorio a conferma della validit…
Multi-modality of polysomnography signals’ fusion for automatic sleep scoring
2019
Objective: The study aims to develop an automatic sleep scoring method by fusing different polysomnography (PSG) signals and further to investigate PSG signals’ contribution to the scoring result. Methods: Eight combinations of four modalities of PSG signals, namely electroencephalogram (EEG), electrooculogram (EOG), electromyogram (EMG), and electrocardiogram (ECG) were considered to find the optimal fusion of PSG signals. A total of 232 features, covering statistical characters, frequency characters, time-frequency characters, fractal characters, entropy characters and nonlinear characters, were derived from these PSG signals. To select the optimal features for each signal fusion, four wi…
Potere disciplinare e norme incorporate
2020
The problem I discuss is whether the behaviors which are the product of the exercise of disciplinary power may be characterized as “normative”, and if so in what sense of the word “normative”. Disciplinary power is, I will say, the “inscription of norms” in the body of those who are subject to it. I distinguish two ways (“indirect” and “direct” inscription) in which norms may be inscribed, through the exercise of disciplinary power, in the body of the subjects, which I dub, respectively, “automatic execution (of norms)” and “normative automatisms”. Automatic execution of norms is a well-known phenomenon. Normative automatisms are odd entities: in the case of normative automatisms, the norm …
Dynaaminen hinnoittelu verkkokaupoissa
2016
Tämän kandidaattitutkielman tarkoituksena on selvittää kirjallisuuskatsauksella, minkälaisia dynaamisen hinnoittelun mahdollisuuksia yrityksellä on verkkokaupoissa. Tutkielmassa käydään läpi, mitä dynaaminen hinnoittelu on, millaisia dynaamisen hinnoittelun malleja on olemassa, minkälaista tietoa minkä- kin mallin käyttö tarvitsee, miten tietoa haetaan ja käsitellään sekä millaisia riskejä dynaamiseen hinnoitteluun sisältyy. Dynaaminen hinnoittelu on hinnoittelumalli, jossa hintaa muutellaan hinnoitteluun liittyvien tietojen perusteen. Dynaamisilla hinnoittelumetodeilla pyritään selvittämään asiakkaan maksuhalukkuus, hinnoitella tuote tai palvelu sen mukaan, ja näin saada maksuhalukkaammilt…
Attivazione del costrutto altruismo ed effetto diretto sul comportamento.
2010
Automatic Influences of Priming on Prosocial Behavior
2013
Literature on the automaticity of social behavior indicates that in some circumstances, priming a concept automatically activates related behavioral schemas. Previous research studies have used priming techniques to increase willingness to help, but most of these have simply measured intention to engage in prosocial behavior rather than real helping behavior. Two different studies investigated the effect of priming the concept of prosocial behavior on real helping behavior. After priming prosociality through a scrambled sentences test, participants were shown to increase their donation rate after a direct request coming from an experimenter's confederate (study 1) and to spontaneously help …