1,721,312 research outputs found
Acque reflue
No full textCaratteristiche dei reflui civili; Indicatori di qualità dei reflui; Trattamenti (pretrattamenti, trattamenti primari, trattamenti secondari, trattamenti terziari, disinfezione); Trattamento dei fanghi
Dynamic Identification of a Solid Rocket Motor From Firing Test Using Operational Modal Analysis
No full textThe main objective of this paper is the identification of the dynamic properties of a solid rocket motor using data recorded during a firing test, characterized by a mass variation due to the burning propeller. The dynamic identification of the motor is provided by applying Operational Modal Analysis (OMA) methodologies able to estimate the modal parameters of the structure undergoing its operative conditions. The sensitivity of the OMA approaches to deal with structures characterized by time-dependent parameters is evaluated through a numerical simulation. Moreover, a comparison between the estimates from different state-of-the-art approaches in OMA (operating in both time and frequency domain) are provided. The capabilities of the OMA methods to track the changes in the natural frequencies, damping ratios and mode shapes of the first stage of the Vega lunch vehicle will be investigated in order to asses the overall efficiency of such approaches. Copyright © 2011 by G. Coppotelli, C. Grappasonni, C. Di Trapani
On the effects of structural modifications in the large wind turbine dynamics
No full textIn this paper a numerical procedure for the investigation of the dynamic behavior of large wind turbines is developed. The aeroelastic modeling is capable to take into account the dynamic environment in which the wind turbines operate by considering the effects of the atmospheric boundary layer and the weight load of the rotating blades. The aerodynamic loads are simulated by the 2D quasi-steady aerodynamic formulation, derived from Greengberg's theory, whereas the structural dynamics of the flexible wind-turbine blade, undergoing significant elastic displacements, has been described by a nonlinear flap-lag-torsion slender-beam differential model. The loading condition and the kinematic effects are described for different configurations of the rotor using a tapered and twisted blade representative of commercial installations. Then, blade structural modifications, represented by structural weakening, are introduced to investigate the effects of local delamination (damages) of the composite compound on the dynamic response of the system giving then useful information concerning the fatigue life of the system. Sensitivity analyses have been performed varying the spanwise location and the magnitude of the reduction of stiffness. Moreover, the effects of a blade mounting error in the pitch angle have been investigated highlighting the critical loading arising from an aerodynamically unbalanced rotor. Copyright © 2011 by L. Balis Crema, G. Coppotelli, C. Grappasonni
L'acqua
No full textARGOMENTI TRATTATI: L'acqua e le sue proprietà; Risorse idriche e loro disponibilità; Approvvigionamento idrico; Inquinamento idrico; Giudizio di potabilità; Potabilizzazione
Rogier van der Weyden et l’Espagne : autour d’une exposition récente
No full textGrappasonni Marie. Rogier van der Weyden et l’Espagne : autour d’une exposition récente. In: Revue belge de philologie et d'histoire, tome 93, fasc. 3-4, 2015. Histoire médiévale moderne et contemporaine - Middeleeuwse moderne en hedendaagse geschiedenis. pp. 889-896
Legislazione in tema di risorse idriche
No full textAcque destinate al consumo umano; Acque minerali naturali; Acque di sorgente; Apparecchiature finalizzate al trattamento delle acque destinate al consumo umano; Acque superficiali; Acque reflue
Predictors of filing claims and receiving compensation in malignant mesothelioma patients
No full textAlthough the predominant occupation origin of mesothelioma is well known, determinant factors involved in filing compensation are scarcely investigated. A linkage between incident mesothelioma cases collected by Italian mesothelioma register (ReNaM) and compensation claims and assignment by Italian national insurance Institute (INAIL) has been conducted for cases diagnosed in the period 2010–2015 and occupational exposure to asbestos. Logistic regression models and decision tree models have been used to identify demographic, diagnostic and anamnestic factors significant for filing and receiving compensation. We have included in the analyses 5019 mesothelioma cases, and among them, 3321 (66.2 %) were found in INAIL archives as mesothelioma cases who fil claims for compensation. The modalities of asbestos exposure, sector of working activities and job type are crucial factors. Furthermore, gender, age at diagnosis, area of residence have been found to be significant predictors of probability to fil claims. Relative risks to fil claims were obtained for the above determinants and conditions to maximize the probability to obtain compensation identified. Our findings demonstrate that there is a need to enforce policies for improving awareness of the occupational origin for mesothelioma cases. Stakeholders, occupational health and safety institutions can play an important role for improving the sensitization regarding the rights of compensation benefits, ensuring the equity and the effectiveness of insurance, welfare and public health systems
Clean and Healthy - Built Environments and Health: Quality of Life in an Urban Context
No full textQuality of life in urban areas is influenced by multiple factors such as home quality, availability of means of transport, water quality, solid and liquid waste disposal services, communication routes, public transport, green areas, availability of pubs and leisure spaces, etc. All these factors can impact not only the quality of life but also the health status of people living in these areas. Taking into account these considerations, the paper suggests water consumption, water quality, and air quality - both outdoor and indoor - as useful indicators to ensure the protection and promotion of human health
Dalla Psicologia Sociale alla Programmazione dei Servizi
No full textIn questo lavoro si è cercato di entrare in rapporto chiaro con i mutamenti sociali e psicologiciintervenuti nel nostro territorio che hanno come causa una catastrofe ambientale ed un'epidemia psicosociale. Si ritiene così di poter offrire il nostro contributo alla progettazione dei servizi che efficacemente dovrebbero passare "dall'essere calati dall'alto, all'essere condivisi dalla base" ovvero cerchiamo di passare da una prospettiva di intervento legata ad un "Welfare State" ad un pensiero progettuale mirante al "Welfare Community"
Effetti sulla salute di un disastro naturale. L’esempio delle Marche e dell’Umbria dopo il terremoto del 1997
No full textÈ stata condotta, attraverso l'uso di
un questionario rivolto ad un cam-
pione di popolazione residente nel-
la zona epicentrale del sisma Mar-
che-Umbria 1997, una indagine epi-
demiologica volta a valutare le ri-
percussioni che il sisma ha determi-
nato sullo stato psico-fisico della
popolazione colpita. I risultati evi-
denziano che lo stato di salute risul-
ta minato per l'aggravamento di
sindromi pregresse e per la compar-
sa di patologie quali depressione,
ansia, aggressività, stanchezza, in-
sonnia, .... L'indagine inoltre evi-
denzia alcuni problemi relativi alla
qualità della vita nei moduli abitati-
vi sia in termini di comfort che di
caratteristiche costruttive
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