Search results for " ICA"
showing 10 items of 10405 documents
Transport policy and climate change: How to decide when experts disagree
2008
Abstract Transport is the sector with the fastest growth of greenhouse gases emissions in many countries. Accumulation of these emissions may cause uncertain and irreversible adverse climate change impacts. In this context, we use the analytic hierarchy process (AHP) to face the question on how to select the best transport policy if the experts have different opinions and beliefs on the occurrence of these impacts. Thus, both the treatment of uncertainty and dissent are examined for the ranking of transport policies. The opinions of experts have been investigated by a means of a survey questionnaire. A sensitivity analysis of the experts’ weights and the criteria’ weights confirms the robus…
Fontane e acquedotti nella Sicilia tra XV e XVII secolo
2014
Between XV and XVII century, the Sicilian cities deal with impressive works of modernization, trough the construction of new conducts and aqueducts. The most eloquent signsof this activity are the precious fountains, built in Messina and Palermo, with a clear role of civic propaganda. In addition to these works, the documents tell, with reference to several cities of the island, of a lasting and dramatic series of quarrels that reveal the political and economic value of the water’s domain. Le città siciliane tra XV e XVII affrontarono una imponente opera di modernizzazione attraverso la costruzione di nuove condutture idriche e di acquedotti. La prova più evidente di questa attività so le p…
Nanotechnology and earth construction: the mechanical properties of adobe brick stabilized by Laponite nanoparticles
2014
The contribution describes the experimental analysis for the improvement of the mechanical properties of samples of earth with the addition of Laponite nanoparticles. Were made two types of samples: the first consisting of soil, sand and water; the second consisting of soil, water, sand and Laponite nanoparticles. The operations performed were: chemical analysis of soil and sand; preparation of samples; Scanning Electron Microscope (SEM) observation of samples for the distribution of the elements, especially the Laponite nanoparticles; testing of compression strength and flexural strength of two types of samples; comparisons of the resulted of the mechanical tests. The improvement of the me…
Stakeholders? views on online interventions to prevent common mental health disorders in adults implemented into existing healthcare systems in Europe
2021
Abstract Background Online preventive interventions can help to reduce the incidence of mental disorders. Whereas knowledge on stakeholders’ attitudes and factors relevant for successfully integrating online treatment into existing healthcare systems is available, knowledge is scarce for online prevention. Methods Stakeholders from Germany, Switzerland, Austria and Spain were surveyed. Potential facilitators/delivery staff (e.g. psychologists, psychotherapists) completed an online questionnaire (n = 183), policy makers (i.e. from the governing sector or health insurance providers) participated in semi-structured interviews (n = 16) and target groups/potential users of mental illness prevent…
Performance Analysis of Innovative Vacuum Insulation Panel
2013
Thermal insulation has become one of the central themes in energy behavior improvement. The use of insulating materials, from the thermal and hydrothermal aspect, allows the reduction of the heat transfer in each of the technical elements increasing their thermal inertia. Even if the research has led to the use of innovative materials with high values of thermal insulation, one of the main problems, which is difficult to resolve, is the thickness of the building envelope to reach levels of transmittance that can allow considerable savings of energy and CO2 emissions. With this objective the VIP (Vacuum Insulation Panel) technology in building applications is an innovative solution to obtain…
An explicit unconditionally stable numerical solution of the advection problem in irrotational flow fields.
2004
A new methodology for the Eulerian numerical solution of the advection problem is proposed. The methodology is based on the conservation of both the zero- and the first-order spatial moments inside each element of the computational domain and leads to the solution of several small systems of ordinary differential equations. Since the systems are solved sequentially (one element after the other), the method can be classified as explicit. The proposed methodology has the following properties: (1) it guarantees local and global mass conservation, (2) it is unconditionally stable, and (3) it applies second-order approximation of the concentration and its fluxes inside each element. Limitation o…
Effect of biomass features on oxygen transfer in conventional activated sludge and membrane bioreactor systems
2019
Abstract The aim of the present study was to compare the oxygen transfer efficiency in a conventional activated sludge and a membrane bioreactor system. The oxygen transfer was evaluated by means of the oxygen transfer coefficient and α-factor calculation, under different total suspended solids concentration, extracellular polymeric substances, sludge apparent viscosity and size of the flocs. The oxygen transfer coefficient and α-factor showed an exponential decreasing trend with total suspended solid, with a stronger oxygen transfer coefficient dependence in the conventional activated sludge compared to the membrane bioreactor. It was noted that the oxygen transfer coefficient in the conve…
Effect of biomass features on oxygen transfer in Conventional Activated Sludge and Membrane BioReactor systems
2018
The present study reports the results on the comparison between the oxygen transfer efficiency in a conventional activated sludge (CAS) and membrane bioreactor (MBR) system. The oxygen transfer was evaluated by means of the oxygen transfer coefficient (kLa)20 and α-factor calculation, under different operating conditions and with different activated sludge features, including total suspended solids (TSS) concentration, extracellular polymeric substances (EPS) content and composition, sludge viscosity and size of the flocs. The (kLa)20 and α-factor showed an exponential decreasing trends with TSS in the CAS and MBR, even if it was noted that the (kLa)20 dependence on TSS was stronger in the …
Indagine termografica degli affreschi nella Chiesa di Santa Maria della Catena a Palermo
2009
Il testo descrive l’applicazione sperimentale di una nuova metodologia analitica diagnostica basata sullo svolgimento sinergico del rilevamento fotogrammetrico e dell'indagine termografica delle superfici architettoniche. La ricerca si pone l'obiettivo di caratterizzare lo stato di conservazione degli affreschi all’interno della Cappella Maggiore nella Chiesa di Santa Maria della Catena a Palermo attraverso l'elaborazione della diagnosi che risulti specifica per la redazione del progetto di conservazione e la direzione del relativo cantiere d’intervento. L'applicazione scientifica è svolta nell'ambito della sperimentazione della nuova Metodologia T.R.U.E. e del relativo software.
Indagine termografica dell'affresco di Diana nel Palazzo Comitini a Palermo
2009
Il testo descrive l’applicazione sperimentale di una nuova metodologia analitica diagnostica basata sullo svolgimento sinergico del rilevamento fotogrammetrico e dell'indagine termografica delle superfici architettoniche. La ricerca si pone l'obiettivo di caratterizzare lo stato di conservazione degli affreschi del Palazzo Comitini a Palermo attraverso l'elaborazione della diagnosi che risulti specifica per la redazione del progetto di conservazione e la direzione del relativo cantiere di restauro. L'applicazione scientifica è svolta inoltre nell'ambito della sperimentazione della nuova metodologia e del software T.R.U.E..