Search results for "Industrial"

Highly Sensitive Polarization Rotation Measurement through a High‐Order Vector Beam Generated by a Metasurface

2020

The precise determination of the polarization state of light is fundamental for a vast variety of applications in remote sensing, astronomy, optics and terahertz technology, to name just a few. Typically, polarization characterization is performed by using a combination of multiple optical devices such as beam splitters, polarizers, and waveplates. Moreover, to achieve high-precision, balanced photodetectors and lock-in amplifiers are employed, thus contributing to increasing system complexity. Here, a technique for polarization rotation measurements with a dynamic range of 180° and a sensitivity of about 10−2 degrees is realized using a properly designed metasurface. Such device generates …

Numerical Simulations of the Flow Field of a Submerged Hydraulic Jump over Triangular Macroroughnesses

2021

The submerged hydraulic jump is a sudden change from the supercritical to subcritical flow, specified by strong turbulence, air entrainment and energy loss. Despite recent studies, hydraulic jump characteristics in smooth and rough beds, the turbulence, the mean velocity and the flow patterns in the cavity region of a submerged hydraulic jump in the rough beds, especially in the case of triangular macroroughnesses, are not completely understood. The objective of this paper was to numerically investigate via the FLOW-3D model the effects of triangular macroroughnesses on the characteristics of submerged jump, including the longitudinal profile of streamlines, flow patterns in the cavity regi…

nota a Cass., sez. III, 2.2.2011 (dep. 21.2.2011), n. 5264 (in tema di vendita di prodotti industriali con segni mendaci - art. 517 c.p.)

2011

Entrepreneurial networking of small businesses in Latin-America : the case of Villa el Salvador in Peru

2014

Discipline del Design e “Slow Journalism”: un antidoto alle fake-news

2021

L’articolo sviluppa una riflessione a partire da un’esperienza di ricerca maturata all’interno dell’Università degli Studi di Palermo nell’ambito del progetto PO FERS “Fake News” che aveva come obiettivo quello di elaborare nuovi e più efficaci meccanismi automatici di valutazione dell’autenticità, originalità e rilevanza dell’informazione prodotta dal giornalismo etico e partecipativo a partire da metodologie e strumenti progettuali propri del design della comunicazione e dell’informazione. The article develops a reflection on a research experience gained within the University of Palermo in the context of the PO FERS “Fake News” project, which aimed to develop new and more effective automa…

Electrochemical sensor for phosphate ions based on laser scriber reduced graphene oxide

2022

This preliminary work shows a new and innovative way to produce laser scribed reduced graphene oxide (LSGO) electrodes using different porous substrates (ranging from paper to plastic and fabric). The obtained electrodes were also tested as electrochemical sensors towards the detection of phosphate ions in water. To obtain the electrodes, a water suspension of GO was filtered on top of substrate (such as Whatman® filter paper) and a complete sensor was obtained from its reduction using a CO2 laser. The electrode is composed of working and counter electrodes made of LSGO and a reference electrode of a Ag/AgCl obtained by using a commercial AgCl conductive paste. Phosphate ions were detected …

Electrochemical treatment of real wastewater with low or high conductivity

2018

In the last years, many efforts have been devoted to the development of electrochemical processes for the effective treatment of wastewater contaminated by organic pollutants resistant to conventional biological processes and/or toxic for microorganisms [1–5]. It was shown that some electrochemical approaches, including the direct anodic oxidation at suitable anodes such as boron-doped diamond (BDD) and/or electro-Fenton (EF) at suitable operating conditions and cells [1–6] can allow to treat effectively a very large number of organic pollutants. However, most of the investigations were performed using synthetic wastewater. Hence, it is now mandatory to study the problems connected to the p…

I mulini ad acqua: dalla conservazione statica alla pratica sistemica

2013

I mulini di Polizzi: dalla conservazione statica alla pratica sistemica. Il sistema tradizionale di molitura con macine azionate dall'energia idraulica, diffuso in tutto il Mediterraneo, è presente molti Comuni della provincia di Palermo, ed è rimasto in uso fino al secondo dopoguerra. Si tratta di strutture produttive a ruota orizzontale; In genere diversi mulini sorgono in successione lungo lo stesso corso d'acqua, costituendo così un sistema. Sono queste le caratteristiche peculiari della “flomaria molendinorum” nel territorio di Polizzi Generosa: una vera e propria scalinata di impianti idraulici ancora visibili nel paesaggio odierno, concentrazioni testimoniate fin dal XII secolo. All'…

Levels and Potential Health Hazards of Chlorinated Pesticidesin Surface Water Samples of Charsadda Area of Pakistan Using SPME-GC-ECD Technique

2021

In the present study, we determined the levels of chlorinated pesticide residues in surface water samples collected from the Charsadda district (KPK, Pakistan). SPME-GC-ECD with COMBI PAL CTC autosampler was used for extraction and analysis of 20 organochlorine pesticides in the collected water samples. For maximum efficiency of the SPME procedure, several parameters were studied, including the extraction and desorption time of the fiber, solution pH, agitation of samples, and stirring speed, etc. This method showed good liner response, with R2 values in the range of 0.9887 to 0.9999 for all pesticides. This method also provided good percent recoveries at 1 µg L−1 (87.5 to 106.0%) and at 2 …

Uncover : Aiap women in design Award : AWDA 3-4

2022

UNCOVER è un progetto polifonico che descrive le proposte di studentesse, professioniste e ricercatrici selezionate nella terza e quarta edizione del premio Aiap Women in Design Award e insieme raccoglie riflessioni teoriche, che affrontano attraverso la lente del design i temi dei diritti e del lavoro femminile, e più in generale delle disparità in ogni ambito. Ai saggi e ai progetti visuali si affiancano le interviste con persone impegnate nei più svariati campi – economia, comunicazione, giornalismo, politica, formazione, arte, volontariato, istituzioni. Un volume non convenzionale, che prova a “scoprire” non solo progetti di comunicazione visiva da ogni parte del mondo, ma anche sto…