7,479 research outputs found
Scienza e teologia fra Seicento e Ottocento. Studi in memoria di Maurizio Mamiani
No full textI saggi affrontano temi di storia del pensiero filosofico, scientifico e teologico della modernità, dall'età di Galileo a quella di Darwin.
Indice: Paolo Rossi, Due interpretazioni di Daniele 12,4; William Shea, Galileo a Roma: incontri e scontri; Franco Giudice, Isaac Newton e la tradizione dei principi attivi nella filosofia naturale inglese del XVII secolo; Brunello Lotti, Filosofia naturale e teologia nello Scholium Generale di Newton; Chiara Giuntini, Locke, Newton e la scienza della Scrittura; Paola Dessì, I cattolici di fronte alla scienza: strategie apologetiche nella Francia di fine Ottocento; Antonello La Vergata, Darwinismo, scienza e religione
Presenti a se stessi. La centralità della coscienza in Locke
No full textLa monografia su Locke di Chiara Giuntini è un imponente lavoro della studiosa prematuramente scomparsa nel 2013, pubblicato postumo a cura di Brunello Lotti e Lia Mannarino. I curatori hanno proceduto a una revisione accurata di tutto lo scritto che era stato ultimato, ma non rivisto dall'autrice. In particolare si è proceduto al controllo e alla correzione delle citazioni, oltreché alla costruzione integrale di un apparato di note che corrisponde alle sommarie indicazioni lasciate dall'Autrice (si veda Avvertenza dei Curatori, pp. 9-12). Il testo è corredato da una ricca bibliografia (pp. 485-526) e dall'Indice dei Nomi
Eredità cartesiane nella cultura britannica
No full textIl volume indaga la presenza di Descartes e del cartesianesimo nella cultura filosofica e scientifica britannica, documentandola da differenti prospettive attraverso un ampio arco temporale che va dal Seicento all'Ottocento. Oltre alle riflessioni complessive di G.A.J. Rogers e di Carlo Borghero, il volume raccoglie contributi sui dibattiti intorno al metodo cartesiano e al progetto di riforma pansofico di Comenio (M. Savini), su Henry More e la dottrina dell'estensione spirituale (I. Agostini), su Henry More e le 'Passioni dell'Anima' (A. Taraborrelli), sulla polemica tra Le Grand e Sergeant (J.R. Armogathe), sulla critica di Sergeant al cogito (B. Lotti), su Locke e la critica a Malebranche (C. Giuntini), su Malebranche e Hume (A. Pyle), sui temi della mente e della coscienza da Descartes a Reid (E. Levi Mortera), su Newton lettore di Descartes (F. Giudice), sul ritorno della fisica cartesiana nella scienza dell'Ottocento (P. Dessì). Completa il volume una Bibliografia delle opere di Descartes pubblicate in Inghilterra nei secoli XVII e XVIII (L. Nicolì)
Da Milano a Babilonia e ritorno
No full textNel 1927, un giovane milanese approda a Hollywood: è il vincitore di un concorso indetto dalla Fox per trovare in Italia un'alternativa a Rodolfo Valentino, divo stellare allora in forza alla concorrenza, e si chiama Alberto Rabagliati (1906-1974). Quattro anni più tardi, la sua carriera d’attore è già finita, stroncata da questioni “amorose”. Tornato in patria, il futuro cantante confidenziale pubblica un resoconto diaristico dell’esperienza americana nel 1932. Nonostante risenta già dello stereotipo moralistico, il racconto di Rabagliati mitiga il ritratto della spregiudicata casta delle stars servendosi di un tono canzonatorio e si fa leggere come una sorta di edulcorato precursore di Hollywood Babilonia, per il quale bisognerà aspettare comunque il 1959. Oltre ai bagordi e agli incontri ravvicinati con i divi più noti, l’autore regala vivide istantanee d’epoca, da testimone d’eccezione di quel passaggio epocale e traumatico tra muto e sonoro che dice la complessa realtà del cinema di quegli anni; un cinema di cui Rabagliati riesce a osservare anche i colossali dati economici e produttivi e non solo i retroscena. Nessun elemento sembra sfuggirgli. Tutto nutre il mito hollywoodiano
The behavior at non-ambient conditions of colemanite: a hydrous Ca-borate
No full textColemanite, CaB3O4(OH)3·H2O, is a common hydrous borate of large economic relevance, as it is one of the major commodities of boron with applications in the fields of glass and ceramic industries. Colemanite-rich layers are usually found in stratigraphic successions related to lacustrine basins in semi-arid to arid environments, associated to a local volcanic activity, which provides the source for boron. Despite the large economic relevance, the behavior of this mineral at non-ambient conditions of temperature and pressure was almost unexplored, which can provide a basis for understanding its stability during diagenetic and metamorphic processes. In this contribution, we report the highpressure behavior of colemanite (Lotti et al., 2017), based on in situ single-crystal synchrotron X-ray diffraction data up to 24 GPa, and its low-T behavior by in situ X-ray and neutron single-crystal diffraction. Colemanite was found to be stable up ~ 14.5 GPa, where a reconstructive phase transition towards a high-pressure polymorph (colemanite-II) with same symmetry (space group P21/a), but a six times larger unit cell volume, occurs. The elastic behavior of colemanite was described by fitting the experimental data with a III-order Birchurnaghan equation of state, yielding the following refined elastic parameters: KV0 = 64(4) GPa and KV' 5.5(7). The colemanite-tocolemanite-II phase transition induces an increase in the average coordination number of both the Ca and B cations. In particular, a fraction of the boron sites increases its coordination from triangular to tetrahedral by making a further bond with a H2O-oxygen atom. Although the phase transition occurs (at ambient temperature) at pressures far from those associated with the usual geologic environments of colemanite, the reported results disclosed flexible deformation mechanisms that borate compounds may adopt to accommodate pressure, thus providing new insights on the behavior of borate minerals at non-ambient conditions. The complex hydrogen-bonding network of olemanite has also been characterized, at ambient and low temperature conditions, by means of in situ single-crystal synchrotron X-ray and neutron diffraction experiments. A positional disorder, related to the presence of two mutually exclusive configurations of the H2O-molecule hydrogen atoms, was found both above and below ~ 0°C, where a displacive phase transition from the P21/a to the P21 space group occurs.
Lotti, P., Gatta, G.D., Comboni, D., Guastella, G, Merlini, M., Guastoni, A., Liermann, H.-P. (2017): High-pressure behavior and Pinduced phase transition of CaB3O4(OH)3*H2O (colemanite), J. Am. Ceram. Soc., in press, DOI: 10.1111/jace.14730
Formidabili quegli anni! Il Centro Italiano per la formazione del medico a San Remo (1969-1989)
No full textSe cerchiamo una data in cui far iniziare la Medical Education in Italia quella è il 1969, data della creazione a San Remo, a cura del dottor Giovanni Lotti, del Centro Italiano per la formazione del medico che ricordiamo per i suoi convegni europei, i primi workshop condotti da George Miller e Jean-Jacques Guilbert, la pubblicazione di una rivista e di testi che hanno segnato la storia di tutti coloro che ancora oggi si occupano di Pedagogia Medica in Italia.Medical Education in Italy has three main phases, which are analysed and discussed in this issues. The first article is dedicated to the first period. The first period (1969-1979) is marked by the creation and implementation of the Italian Centre for Medical education in San Remo, which also had an international role as a founding member of AMEE, and organized two European conferences in Medical education in 1969 and 1971. George Miller and Jean Jacques Guilbert were leaders of paradigmatic workshops. The founder of Italian Center of Medical Education in San Remo was Giovanni Lotti, who dedicated his passion and energy to create a Center which organized international conferences, national workshops for training trainers of continuing medical education and interactive workshops about medical topics. He coordinated the Center with prof Costantino Iandolo and together published for 17 years a scientific journal for continuing medical eduators FPM, and edited a Handbook for continuing medical educators and translated into Italian the Guilbert’s WHO Educational Handbook for health professional. The second period (1979-1992) is marked by the creation and implementation of Smith Kline Foundation, which had a leading role to train university medical teachers. It was a WHO corresponding member The third period (1985-2014) sees the foundation of the Italian Society of Medical Education and the implementation of all its activity to promote educational innovation at undergraduate, post-graduate and continuing medical education
Pinocchio-Maciste contro tutti. Film e divismo cinematografico tra le righe di una "pinocchiata" del 1920
No full textDall'introduzione di Luciano Curreri: "Con Denis Lotti, approdiamo al trionfo del visuale cinematografico grazie a una piccola e nascosta entrée en matière, ovvero la specola conoscitiva di una «pinocchiata» poco citata: Pinocchio nuovo Maciste, libello di centosessantacinque pagine uscito nel 1920 – qui presentato in una parca antologia confezionata dallo stesso Lotti – e scritto da Annunciata Beatrice Arrigoni, la cui identità è avvolta da un sostanziale mistero al pari dell’unica opera edita ‘nota’. Il primo folgorante incontro con il cinematografo è quasi perturbante e riguarda il Pinocchio prodotto dalla Cines nel 1911, diretto da Giulio Antamoro in arte Gant, e con, nel ruolo del protagonista, Ferdinand Guillaume, funambolo italo-francese conosciuto con gli pseudonimi Tontolini e Polidor. Ma i riferimenti son tanti e Lotti li contestualizza in quel divismo cinematografico che conosce bene e in cui il celebre burattino sembra a suo agio da sempre
Microporous compounds at non-ambient (P,T) conditions: mechanisms of structure deformation, phase transitions and crystal-fluid interactions
No full textMicroporous compounds are a class of open-framework materials; their structures contain cavities (in the form of channels or cages) with free diameters < 2 nm [1]. Zeolites, with their peculiar physical-chemical properties and diverse technological applications, are the most important group of this class, followed by feldspathoids and crystalline compounds with “hybrid” heterosilicate frameworks. The knowledge of the structural evolution of this class of materials under extreme conditions (i.e., high/low temperature, high pressure) is of paramount importance, especially for the potential implications in materials science and Earth sciences. Zeolites, for example, are an important bulk commodity: the world production of natural zeolites in 2016 was about 2.8 million of tons (price: 100-230 dollars per ton) and the consumption of synthetic zeolites was approximately 1.6 million of tons.
Few decades of high-temperature and high-pressure studies of zeolites disclosed that a complex interplay between the framework topology and the extraframework constituents drives the structural response to (T,P)-variations. Isostructural compounds, which differs for the extraframework population only, are an ideal target for studying how strong may be the control exerted by ions and molecules (that fill the structural cavities) on the bulk behavior of the material. An X-ray diffraction study of four end-members of the cancrinite-group of minerals (feldspathoids), conducted by in situ high-T and high-P experiments, revealed that even slight changes in the extraframework population exert a control on the mechanisms of structure deformation, which are reflected on the bulk elastic behavior of the mineral [2-5].
Microporous compounds usually accommodate isostatic compression mainly by tilting of the framework tetrahedra, around the bridging oxygen atoms, which act as hinges. However, symmetry or chemical constraints may hinder this mechanism: displacive phase transitions can occur in zeolites and zeolite-like materials, in order to accommodate thermal, pressure and chemical stresses. In this respect, the high-P behavior of SiO2-ferrierite is an interesting case study, as it undergoes, in a relatively narrow P-range, two displacive phase transitions with complex group-subgroup relationships (PmnnP121/n1(P-1)P21/n11, [6]).
In the last few years, a growing interest was devoted to the behavior of open-framework materials when compressed in the so-called “penetrating fluids”, i.e. fluids in which molecules are small enough to be intruded at high pressure into the structural cavities. Once more, SiO2-ferrierite may be considered an interesting case study. This zeolite has been compressed using three different P-media (i.e., 16:3:1 methanol:ethanol:H2O mixture, ethylene glycol and 2-methyl-2-propanol). The intrusion of the fluid molecules into the zeolite channels and cages was able to modify the bulk compressibility of the material and to prevent the transition to the P21/n11 polymorph, showing the strong control played by the extraframework population on the compressional behavior. Similar findings were also reported for other zeolites (e.g., the zeolite AlPO4-5 [7]). Several parameters were found to control the intrusion processes, among them: the sample size (e.g., powder vs. single crystal) and the kinetics of compression. The first controls the magnitude of the intrusion process, whereas the second may prevent the intrusion, as confirmed by fast-compression experiments on zeolites [6].
[1] C. Baerlocher, L.B. McCusker, D.H. Olson, Atlas of zeolite framework types, Elsevier, Amsterdam, 2007.
[2] P. Lotti, G.D. Gatta, N. Rotiroti, F. Cámara, Am. Mineral. 2012, 97, 872.
[3] P. Lotti, G.D. Gatta, N. Rotiroti, F. Cámara, G.E. Harlow, Z. Kristallogr. 2014, 229, 63.
[4] P. Lotti, G.D. Gatta, M. Merlini, M. Hanfland, Micropor. Mesopor. Mater. 2014, 198, 203.
[5] G.D. Gatta, P. Lotti, Am. Mineral. 2016, 101, 253.
[6] P. Lotti, R. Arletti, G.D. Gatta, S. Quartieri, G. Vezzalini, M. Merlini, V. Dmitriev, M. Hanfland, Micropor. Mesopor. Mater. 2015, 218, 42.
[7] P. Lotti, G.D. Gatta, D. Comboni, M. Merlini, L. Pastero, M. Hanfland, Micropor. Mesopor. Mater. 2016, 228, 158
L'apprendimento per problemi. Una metodologia con funzione orientativa.
No full textProblem based learning . A methodology for vocational training.
The author describes an educational project about vocational training which lasted 7 years.
The project had two main objectives:
1.to identify the students who didn’t want to go to high school and to help them to choose the best alternative for them (apprenticeship or professional training)
2. to plan and implement and evaluate a parallel program for those students. The Parallel Track was an innovative program which was student-centred and used interactive methods like : problem based learning (PBL), role playing sessions, site visits and short work experiences.
The Project followed several steps: teacher training activities, creation of a planning group, creation of educational materials, creation of students working groups, implementation of the educational activities. The Parallel track program lasted 4 months (20 sessions with students) and it was repeated for 7 years.
After 7 years it was held the evaluation of the impact of this Project. 140 students were invited to evaluate this project, 75 went for a semi-structured interviews. They said the Parallel Track program helped them to choose their career, 45% said that they well understood what was necessary to enter in the market labour, 25% understood what to do to look for a job
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