2,144 research outputs found
The Role of Formulation and Working Parameters on the Rheological Properties of Semolina Doughs for the Production of Carasau Bread
No full textCarasau bread is a typical Sardinian baking product, with great commercial potential, due to its long shelf life. Nowadays, its production is performed, in most cases, in small or medium size factories, where the working conditions and quality properties of the product are set on an empirical basis. Thus, the processing know-how lacks quantitative information, and the product is still far from standardization. As a result, industrial-scale manufacturing is hindered. The literature presents some studies devoted to better explaining the effect of semolina doughs' main constituents (gluten, starch, etc.) on their rheological properties or to infer the latter through in-line measurement. However, it is still necessary to understand the role of each working parameter in conditioning the dough rheology.
This work investigated the role of five working parameters: yeast amount, salt amount, water temperature, kneading time, and leavening time. The water amount was kept constant to avoid covering other effects because its role can be predominant in most cases. A Design of Experiments (DOE) was performed, in order to plan the experimental campaign. First, the dough samples were tested through a parallel plate rheometer (Anton Paar, model MCR 102), applying both creep and frequency sweep tests. Moreover, the same samples were subjected to Texture Profile Analysis (TPA) to highlight possible correlations between theoretical rheological model parameters and TPA ones, which can be obtained in shorter times, so being more suitable for process monitoring purposes
The fluorine in surface waters: origin, weight on human health, and defluoridation techniques
No full textIn order to understand the distribution of fluorine in surface environments, also linked to fluoride deposits, this paper discusses the role of rift systems in fluorine enrichment of surface waters, with two examples: the Sardinia Island and the East African Rift. The main goal of this study is aimed to highlighting the areas that could potentially host fluorine in the surface waters in order to make it easier the lecture also for people to search and read not experts in the field, such as the biomedical field. Furthermore, potentialities and limitations of the currently available defluoridation techniques were examined, in order to identify the best intervention technology.
From a careful review of the literature, to the addition of the extensive field observations in Sardinia and Ethiopia carried by the authors in the previous decades, we highlight the origin, processes and evolution of F-migration in Rift systems.
The given examples of Sardinia and Ethiopia show that the origin and consequent behaviour of fluorine is strictly controlled by the rift systems. In this framework, the availability of fluorine for surface waters depends on two possible types of sources: a direct supply and an indirect supply. Directly from spring waters and ground waters fed by hydrothermal systems related to rifting, and indirectly from the leaching of products of rift-related activities, such as fluorite-bearing deposits, sedimentary or meta-sedimentary rift-related sequences, and volcanic or metavolcanic complexes emplaced along rift structures. The whole geological history of a given area must be taken into account in interpreting its present fluorine geochemistry.
In conclusion, we underline the aspects of a possible control of these areas where fluoride exposure might lead to a long-term harm to local communities and we point out the nowadays best remediation-technologies, discussing their pro and cons in their applicability to different scales and social-contexts
Relazioni sincrone e longitudinali tra comprensione del testo e risoluzione dei problemi matematici nelle classi seconda e quinta della scuola primaria: confronto tra bambini nativi italiani e bambini provenienti da contesti migratori
No full textI bambini che frequentano la scuola primaria possono mostrare difficoltà nella comprensione e risoluzione di problemi matematici che comprendono testo (problemi verbali). Tale difficoltà riguarda i nativi monolingui ma soprattutto gli stranieri bilingui, per i quali affrontare i problemi scritti nella seconda lingua (L2) può essere difficile, specialmente quando il testo è lungo e quindi la sua struttura sintattica è probabilmente più complessa. Esistono vari fattori di rischio e di protezione nei confronti di un’adeguata comprensione del testo dei problemi verbali; lo scopo di questa ricerca è contribuire a comprendere quali siano questi fattori e il ruolo che essi svolgono in riferimento alla corretta comprensione e risoluzione dei problemi matematici con testo scritto in una L2 ad ortografia trasparente, nello specifico la lingua italiana. A tal fine, sono stati condotti due studi sulle prestazioni dei bambini con sviluppo tipico della scuola primaria alle prove di Lettura (decodifica), Italiano (comprensione del testo) e Matematica di INVALSI, che l’ente ha somministrato nelle classi seconda e quinta della scuola primaria nell’ambito delle Rilevazioni Nazionali degli apprendimenti degli studenti in Italia negli a.s. 2015/2016 e 2018/2019. L’analisi dei dati innanzitutto evidenzia il valore predittivo della decodifica di lettura rispetto alla comprensione del testo e di quest’ultima nei confronti della risoluzione dei problemi matematici a livello sia sincrono che longitudinale sia per i nativi monolingui che per gli stranieri bilingui. Inoltre, alcuni fattori predicono maggiormente rispetto ad altri il successo o l’insuccesso scolastico e in maniera diversa in base alla cittadinanza. In particolare, per i bambini nativi avere uno status socio-economico-culturale (ESCS) medio-alto o alto è importante per il raggiungimento di più elevati livelli negli apprendimenti scolastici. Per i bambini stranieri, le difficoltà di comprensione dei problemi verbali, soprattutto con testo lungo, sono associate a maggiore distanza fonologica e sintattica tra L1 e Italiano, età di arrivo in Italia più tardiva e ESCS medio-basso. Al contrario, i bambini stranieri che frequentano la scuola con orario prolungato sono facilitati nel comprendere e risolvere correttamente i problemi matematici quando il testo è breve, indipendentemente dal loro ESCS
The Poem of Memory. "Triumphi"
No full textWriting of the "Triumphi" Fabio Finotti finds that its author undercuts a medieval idea of ascent to God in the structural progression from Love to Chastity, Death, Fame, Time, and Eternity. Here Petrarch programmatically counters Dante, transforming a universal, eschatological vision into a subjective, cultural and psychological experience
Fabio Tronchetti
No full textFabio Tronchetti is an Associate Professor of Law at the School of Law of the Harbin Institute of Technology, People’s Republic of China, where he also serves as Director of the International Law Department. Since January 2014 he works as an Adjunct Professor of Comparative National Space Law at the the School of Law of the University of Mississippi, United States. Earlier in his career he was Lecturer and Academic Coordinator at the International Institute of Air and Space Law, Leiden University, the Netherlands.
Professor Tronchetti is regularly invited to give lectures at several European and Chinese Universities, including the Cologne University (Germany), the Leiden University (the Netherlands) and the Beihang University (Beijing, China) and has participated as a speaker at numerous international conferences.
Prof. Tronchetti’s scholarly is primarily in the areas of international space law and public international law. His publications include two books and more than 20 articles in internationally peer-reviewed space law and policy journals, such as Space Policy, the German Journal of Air and Space Law, the Journal of Space Law, etc.
He holds a PhD in International Space Law (Leiden University) and an Advanced LL.M in International Relations (Bologna University, Italy). He is Member of the International Institute of Space Law (IISL), European Centre for Space Law (ECSL), and the Asian Society of International Law (ASIL). He is the recipient of the 2007 Diederiks-Verschoor award for the best paper submitted by an author not older than 40 years to the International Institute of Space Law (IISL) during the 58th International Astronautical Congress of the International Astronautical Federation (IAF).https://commons.erau.edu/stm-images/1076/thumbnail.jp
Preliminary Study and Numerical Investigation of an Electrostatic Unit for the Removal of Fluoride from Thermal Water of Ethiopian Rift Valley
No full textThis article deals with the numerical modeling of the multiphysics investigation of an electric-field-based device for the defluoridation of Ethiopian water to mitigate fluorosis while satisfying the World Health Organization quality requirement for potable water. A tubular reactor with metallic parallel plates, connected to a static voltage source, exerts an electric force on the ion in solution, attracting it to the electrodes. Meanwhile, the ion is drifted by the laminar water flow which, in turn, allows us to separate and collect the F − -rich stream from the potable one. In this system, the electrostatic problem and the mass transport are coupled according to the highly nonlinear modified Poisson–Nernst–Planck–Stokes equations system. Therefore, carefully modeling the dielectric permittivity, the ionic diffusivity, and mobility as function of fluoride concentration and temperature, the set of operating parameters to ensure the highest fluoride removal from Ethiopian thermal water is identified
Per un ritratto di André Tosel
No full textIn memory of André Tosel, who passed away last March 14th in his hometown Nice, «Gramsciana» publishes an article on Gramsci in France that he had sent to this journal as a contribution to the section «My Gramsci». The editor, Fabio Frosini, prefaces the text with a quick portrait of Tosel as a philosophy professor, an influential Marxist intellectual, a critic of contemporary capitalism, as well as the author of landmark books on Spinoza, Kant and Marx and, above all, one of the most important Gramsci scholars of the last 50 years
Diagnosis and analysis as the first steps in a turnaround management process model
No full textAuthor Fabio Damm, BScDiplomarbeit Universität Linz 201
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