Search results for " static"
showing 10 items of 62 documents
Preliminary investigations on indirect competition among Italian employers’ associations, and the relevant effects on collective bargaining
2022
Le associazioni dei datori di lavoro sono attori importanti per il sistema delle relazioni industriali e della contrattazione collettiva. I datori di lavoro e i sindacati in genere negoziano gli standard di lavoro in termini di salari e condizioni di lavoro per conto rispettivamente delle aziende associate e dei dipendenti. Sebbene la maggior parte della letteratura sulle relazioni industriali si sia concentrata principalmente sulla forza associativa e sulla densità associativa delle associazioni dei datori di lavoro, in questa pubblicazione a cura di Michele Faioli e Silvio Bologna, gli autori si discostano da questa prospettiva e si concentrano sul funzionamento e sulla governance, ovvero…
Il restauro delle architetture liberty a Mondello: aspetti statici e tecniche per la conservazione della consistenza materica
2010
Il restauro delle architetture liberty a Mondello è il tema del poster. Il contributo mostra l'applicazione di metodiche innovative per l'analisi statica delle strutture, e introduce il sistema evoluto per l'individuazione e la mappatura dei difetti. The restoration of the liberty architecture in Mondello is the theme of the poster. The contribution shows the application of innovative methods for static analysis of structures, and introduces the advanced system for the identification and mapping of defects and lesions.
Robust control of a Hammerstein model of DC/DC converters
2007
This paper deals with the robust control of a Hammerstein mathematical model of DC/DC converters, consisting of the nonlinear static characteristics of the converter followed by one of a few number of linear time- invariant models which describe the converter in the useful working range. One of these models is assumed as the nominal model of the system and the remaining models are used for describing the model uncertainty. Nominal behaviour is assured using H-2 optimal control method, Robust stability and behaviour are assured by imposing H-infin specifications. The closed loop control system consisting of the converter Hammerstein model and the robust controller is analyzed by means of sim…
A physicist friendly method to control extruded-liposome concentration by using static light scattering
Static and dynamic mechanical properties of Arundo Donax fillers-epoxy composites
2014
Abstract Aim of this work is to investigate the feasibility of using a natural and inexpensive filler obtained by grinding the culms of Arundo Donax as reinforcement of epoxy resins. The effect of the content and size of Arundo Donax fillers on static and dynamic mechanical properties was evaluated showing that the composites exhibit higher tensile moduli, comparable flexural moduli and lower strength properties in comparison to the neat resin. Moreover, changes in the storage and the loss moduli only above the glass transition temperature (i.e. in the rubbery region) were found while neither significant shifts of tan δ peaks to higher temperatures nor reductions in the peak height of the c…
Analysis of Rectangular Orthotropic Membranes for Mechanical Properties Identification through Load-Displacement Data
2021
In this paper, an innovative procedure is introduced for the identification of the mechanical properties of orthotropic membranes based on load-displacement data. To this end, novel functional forms of the displacement components for rectangular membranes are appropriately introduced. Unknown coefficients of these displacement functions are determined, minimizing the total potential energy of the membrane. The energy method is then combined with an optimization procedure to estimate the elastic constants of the membranes in a straightforward manner. Specifically, a genetic algorithm is used to minimize a properly defined objective function directly related to the sought mechanical propertie…
Effects of weathering on the performance of self-cleaning photocatalytic paints
2019
Abstract The use of photocatalytic products for the surface coating of buildings is spreading more and more, because of the reduction of atmospheric pollutants and the colour maintenance of the paints over time with reduction of the maintenance costs and the improvement of the aesthetic appearance. The study reports the evaluation of the effects of the atmospheric conditions on three commercial photocatalytic paints containing TiO2. In particular tests were carried out by using samples subjected to accelerated aging inside a climate chamber and naturally aged by exposure for two years to the external environment of the city of Palermo (representative of a coastal environment of the Mediterr…
Influence of the Mediterranean Sea on the West African monsoon: Intraseasonal variability in numerical simulations
2010
[1] The influence of May to September sea surface temperature (SST) anomalies in the Mediterranean Sea on the West African monsoon is investigated, analyzing the outputs of numerical sensitivity experiments performed using three atmospheric general circulation models (Action de Recherche Petite Echelle Grande Echelle, European/Hamburg, and University of California, Los Angeles) in the framework of the African Monsoon Multidisciplinary Analysis project. The precipitation and atmospheric dynamics response to the SST forcing is explored, in terms of intraseasonal variability, evaluating the results from the individual models and from the multimodel mean. A positive precipitation response to wa…
A Closer Look at the Comparative Statics in Competitive Markets
2005
In this paper we revisit the dual approach to comparative statics in competitive markets, allowing for the essential results to arise from a comprehensive and unified framework. We study, for both the long-run and the short-run, the response of all the endogenous variables to price factor changes in a way that captures the outputprice effects arising from market-firm interactions. We show that it is necessary a richer characterization of the nature of factors with respect to output, connected with marginal cost and output demand elasticities, for completely determining such responses.
Electrostatic Tuning of the Ligand Binding Mechanism by Glu27 in Nitrophorin 7
2018
AbstractNitrophorins (NP) 1–7 are NO-carrying heme proteins found in the saliva of the blood-sucking insect Rhodnius prolixus. The isoform NP7 displays peculiar properties, such as an abnormally high isoelectric point, the ability to bind negatively charged membranes, and a strong pH sensitivity of NO affinity. A unique trait of NP7 is the presence of Glu in position 27, which is occupied by Val in other NPs. Glu27 appears to be important for tuning the heme properties, but its influence on the pH-dependent NO release mechanism, which is assisted by a conformational change in the AB loop, remains unexplored. Here, in order to gain insight into the functional role of Glu27, we examine the ef…