Search results for "ODS"
showing 10 items of 5812 documents
Early warning for VHE gamma-ray flares with the ARGO-YBJ detector
2011
Detecting and monitoring emissions from flaring gamma-ray sources in the very-high-energy (VHE, > 100 GeV) band is a very important topic in gamma-ray astronomy. The ARGO-YBJ detector is characterized by a high duty cycle and a wide field of view. Therefore, it is particularly capable of detecting flares from extragalactic objects. Based on fast reconstruction and analysis, real-time monitoring of 33 selected VHE extragalactic sources is implemented. Flares exceeding a specific threshold are reported timely, hence enabling the follow-up observation of these objects using more sensitive detectors, such as Cherenkov telescopes. (C) 2011 Elsevier B.V. All rights reserved.
L’accertamento del trasferimento d’azienda in caso di cambio di appalto nel rito “Fornero”
2021
Con la sentenza n. 2315/2020 la Suprema Corte ha affermato il principio che l’accertamento dell’anzianità di servizio conseguente ad un trasferimento d’azienda può essere affrontato nell’ambito del rito speciale di impugnazione del licenziamento introdotto dalla L. n. 92/2012. Nella decisione in commento la Corte ha altresì modo di dare continuità all’orientamento per cui la fattispecie traslativa si perfeziona anche in presenza di un mero passaggio di personale in forza di obbligo contrattuale o di legge. Infatti se in un determinato appalto di servizi un imprenditore subentra ad un altro e ne acquisisce il personale e i beni strumentali organizzati (cioè l’azienda), la fattispecie no…
Change and stability: Within-person life satisfaction over a 20-year period using data from the HUNT survey
2020
Background: The aim of the present study was to investigate within-person life satisfaction (LS) dynamics for two age groups, 20–29 and 30–39 years, from 1984 to 1986 and to follow them over a 20-year period. Methods: Data from 1984 to 2008 were extracted from the large, prospective, longitudinal North-Trøndelag Health Study (HUNT), Norway. This paper includes data from more than 14,500 persons. Data were analysed using logistic regression, and LS dynamics were modelled using gender, time and self-rated health. Results: The analyses revealed that about 20% of people in these age groups had a stable level in LS, also known as set point. Long-term LS change, defined as ⩾2 SDs, was reported f…
El alcoholismo femenino : una perspectiva sociológica
2003
Overview and Essentials of Biomass Gasification Technologies and Their Catalytic Cleaning Methods
2016
Obtaining a tar-free biosyngas from biomass gasification processes has been the subject of many studies in the past 2 decades, and it still remains the major technologic and economic challenge. Unfortunately, the countless publications about gasification technologies and different techniques permitting reduction of the tar present at the outlet of gasifier reactors usually confuse inexperienced persons who attempt to further research this subject. More than presenting the basis of biomass gasification technologies and positioning them among other bioenergies, this work mainly aims at reviewing and comparing the different methods developed in order to produce a tar-free biosyngas. In this wa…
L’USO DEI DISPOSITIVI DI RINFORZO LIGNEO NELL’ARCHITETTURA SICILIANA IN ETÀ MODERNA
2014
Il saggio studia l’uso dei dispositivi di rinforzo ligneo nelle architetture siciliane d’età moderna ponendo criticamente a confronto documenti di fabbrica, brani tratti dai trattati d’architettura, siciliani e non, e contributi offerti dalla letteratura storica non specialistica. Lo studio evidenzia la persistenza e le peculiarità d’uso di una tecnica che, molto diffusa in area mediterranea, in Sicilia si configura come una “invariante” del repertorio costruttivo tradizionale.
Optimizing and Modeling the drying process of the Natural Gas through the Taguchi method
2018
The aim of this study is to highlight the optimization method of the drying process of natural gas, using the Taguchi method. The natural gas undergoes several stages from its extraction until reaching its end consumer. As the natural gas contains several impurities and a certain quantity of water and vapors, the drying process is very important to obtain a product of high quality. Gas dehydration can be obtained through several methods, the method presented here being the absorption method - by use of a drying station with triglycol. This method is considered to be the most convenient one taking into account the obtained results. Nevertheless, cost reducing is the main objective for compan…
Modelling heat transfer-controlled cooling and freezing times: a comparison between computational values and experimental results
2013
Modelling of heat transfer-controlled cooling and freezing time predictions are very important for a good preservation of foodstuffs. In that regard, we used a computer code based on the finite-element method that allowed us to analyse the phase-change of various foodstuffs during their freezing. The model was exercised to predict process times. The results can be used to design high efficiency plants. In this work, the results predicted by the FEM program are compared with the experimental values given in technical literature.
Optimal passive-damping design using a decentralized velocity-feedback H-infinity approach
2012
In this work, a new strategy to design passive energy dissipation systems for vibration control of large structures is presented. The method is based on the equivalence between passive damping systems and fully decentralized static velocity-feedback controllers. This equivalence allows to take advantage of recent developments in static output-feedback control design to formulate the passive-damping design as a single optimization problem with Linear Matrix Inequality constraints. To illustrate the application of the proposed methodology, a passive damping system is designed for the seismic protection of a five-story building with excellent results. Peer Reviewed
Electron crystallography and non-linear optics
1999
Electron crystallography can be used to obtain specific information about molecular parameters such as the polarisability, dipole moment, and hyperpolarisability. In this, work we show how a combination of quantum mechanics and simulation methods can be used to solve several unknown organic structures and how the calculated molecular parameters can be used to predict the corresponding physical properties of the crystals.