Search results for "Diffusion"
showing 10 items of 1615 documents
Modeling and Design of Membrane Process Recovery of HCl and Metals from Pickling Solutions
2018
Abstract Hydrochloric acid pickling is one of the key steps in the hot-dip galvanizing process. It is a process widely used as a chemical pre-treatment method for cleaning, where metal surfaces with oxides are immersed into an acid solution. During the pickling process, the acid concentration decreases with time while the metal is accumulated. Thus, the efficiency of the pickling solution decreases and fresh solution must be used. Continuous regeneration of pickling solutions enhances pickling rate and process performance, but also minimises industrial wastewater disposal and chemicals consumption. The recovery and recycling process of valuable substances (e.g. acid and metals) can be accom…
Economic Benefits of Waste Pickling Solution Valorization
2022
An integrated hybrid membrane process, composed of a diffusion dialysis (DD), a membrane distillation (MD) and a reactive precipitation unit (CSTR), is proposed as a promising solution for the valorization and onsite recycling of pickling waste streams. An economic analysis was performed aiming to demonstrate the feasibility of the developed process with a NPV of about EUR 40,000 and a DPBP of 4 years. The investment and operating costs, as well as the avoided costs and the benefits for the company operating the plant, were analyzed with an extensive cost tracking exercise and through face-to-face contact with manufacturers and sector leaders. A mathematical model was implemented using the …
Noise Filtering Using Edge-Driven Adaptive Anisotropic Diffusion
2008
This paper presents a method aimed to noise removal in MRI (Magnetic Resonance Imaging). We propose an improvement of Perona and Malik's anisotropic diffusion filter. In our schema, the diffusion equation of the filter has been modified to take into account the edges direction, This allows the filter to blur uniform areas, while it better preserves the edges. Both quantitative and qualitative evaluation is presented and the results are compared with other methods.
The ‘margin of appreciation’ in echr case-law as a boundary line to legal transplants
2015
This study investigates the influence of the European Human Rights Court on State 'margin of appreciation' on the diffusion of accepted or rejected cultural and political choices through the jurisprudence of the case-law. The margin of appreciation is aninterpretative argument, a criterion, a parameter, which allows the Court to preserve rather than censure national State policies and choices on difficult issues which, involving moral and ethical questions, and which do not receive common answers in the ,European legal systems. The work considers some decisions of the Court on abortion, ovum donation, pre-implant embryo analysis and artificial procreation techniques, to find out if, in such…
Law and glocalization
2022
The chapter intends to analyze the existing relationship between, law, globalization and grobalization. Having briefly illustrated the key concepts of globalization and grobalization, in order to examine the above relationship the chapter analyzes first the concepts of hybridity, mixity and diffusion as used in comparative law, in order to determine to which extent the same concepts as used in legal sociology cannot create misunderstandings. After having clarified all the key elements for the analysis, then the chapter focuses on how globalization and grobalization intersect with law, putting forward some related examples. The chapter ends with some conclusive remarks.
La pluralità dei sistemi musicali e le origini della musica (parte prima)
2021
Il testo tratta la nascita degli interessi scientifici verso le tradizioni musicali extraoccidentali grazie alla nuova disciplina denominata "musicologia comparata" e agli studi etno-antropologici di orientamento evoluzionista e diffusionista. In questo contesto di studio viene dato particolare rilievo alle ipotesi riguardanti le origini della musica, che vengono sinteticamente ripercorse e valutate.
In vitro evaluation of the antibacterial activity of cured dentin/enamel adhesive incorporating the antimicrobial agent MDPB
2010
The aim of this study was to investigate in vitro the antibacterial effect of a dentin/enamel adhesive containing MDPB (Clearfil Protect Bond) after curing and to compare it with an adhesive not containing MDPB (Clearfil SE Bond). The antibacterial effect of the cured adhesives was tested on Enterococcus faecalis by the evaluation of growth inhibition in a 48-h microplate direct contact test (DCT). The presence of antibacterial activity due to soluble components was also investigated by an agar diffusion test (ADT) performed with the adhesives cured on the surface of dentin disks. In the DCT, both the tested materials showed complete inhibition of bacterial growth until the 7-h reading, reg…
Diffusion modeling of COVID-19 under lockdown
2021
Viral immune evasion by sequence variation is a significant barrier to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine design and coronavirus disease-2019 diffusion under lockdown are unpredictable with subsequent waves. Our group has developed a computational model rooted in physics to address this challenge, aiming to predict the fitness landscape of SARS-CoV-2 diffusion using a variant of the bidimensional Ising model (2DIMV) connected seasonally. The 2DIMV works in a closed system composed of limited interaction subjects and conditioned by only temperature changes. Markov chain Monte Carlo method shows that an increase in temperature implicates reduced virus diffusi…
Studio di parcellizzazione talamica per l’identificazione del target di trattamento applicato alle talamotomie trans-craniche mediante ultrasuoni foc…
2019
SCOPO DEL LAVORO: La tcMRgFUS consente di effettuare una vera e propria esplorazione neurofunzionale per confermare ed ottimizzare il target lesionale prima di indurre una lesione cerebrale permanente. La scelta del target di trattamento si basa tuttavia su coordinate stereotassiche che non tengono conto delle diversità anatomiche di ciascun individuo. Essendo il paziente vigile durante tutta la durata della procedura, l'ottimizzazione del target di trattamento viene effettuata sulla base del feedback del paziente nel corso della procedura utilizzando sonicazioni di potenza sub-lesionale. Scopo di questo lavoro è valutare retrospettivamente il possibile ruolo della parcellizzazione talamica…
Studio preliminare di parcellizzazione talamica per l’identificazione del target di trattamento applicato alle talamotomie trans-craniche mediante ul…
2018
Introduzione La tcMRgFUS consente di effettuare una vera e propria esplorazione neurofunzionale per confermare ed ottimizzare il target lesionale prima di indurre una lesione cerebrale permanete. La scelta del target di trattamento si basa tuttavia su coordinate stereotassiche che non tengono conto delle diversità anatomiche di ciascun individuo. L'ottimizzazione del target di trattamento viene effettuata sulla base del feedback del paziente durante la procedura stessa. Materiali e metodi È’ stato utilizzato uno scanner RM da 1.5T per acquisire sequenze morfologiche 3D e ultrastrutturali (DTI) in pazienti successivamente sottoposti a tcMRgFUS. È stata effettuata una segmentazione delle aree…