197,219 research outputs found
Disegno – Laboratori del primo anno
No full textIl volume illustra l’attività condotta all’interno dei Laboratori del disegno tenuti presso la Facoltà del Design del Politecnico di Milano. Prendendo a riferimento l’a.a. 2000/2001, esso non si configura come testo didattico quanto, piuttosto, come rendiconto di una sperimentazione didattica che ha progressivamente portato ad affiancare all’insegnamento tradizionale del disegno forme di rappresentazione non grafiche (fotografia, modellistica ecc), per approdare, attraverso gli anni, all’attuale formula del laboratorio multidisciplinare. Collocati al primo anno del corso di studi, tali laboratori propongono pertanto un approccio complessivo ai problemi della rappresentazione, privilegiando una metodologia didattica di tipo induttivo e tenendo conto delle specificità che l’insegnamento del disegno presenta in una scuola di design rispetto ad una facoltà di architettura o di ingegneria
L’Ottocento tra sviluppo industriale e questione sociale
No full textTra Adda e Lambro, tra Milano, Monza e le colline le tracce della storia risaltano tra le pieghe della modernità. Il Museo del territorio, inserito nella Settecentesca Villa Sottocasa di Vimercate, esprime i contenuti e i processi dell'evoluzione recente
Industrial Policy and Artisan Firms (1930s-1970s)
No full textThis essay shows that after WW2 the Italian state carried out a policy for artisanship (that is, for the smallest firms) of an extent that was unparalleled in Europe. This policy was based on the provision, on the one hand, of lower taxes and and employers' contributions as well as welfare benefits at reduced premiums and, on the other hand, of 'substitutive factors': soft loans, srevices and promotional initiative by state agencies. Such a policy for artisanship played a twofold role: partly 'defensive', protecting a segment of marginal firms, and partly 'proactive', prompting modernisation and innovation of more promising firms. The latter were clustered especially in the industrial districts of the centre and north-east of the country, whose development turned out to be boosted to a significant extent by state intervention
Development of dry-state SERS substrates for the noninvasive detection of artistic dyes in textiles
No full textSurface-enhanced Raman spectroscopy (SERS) is a powerful technique for the detection of natural dyes, allowing one to overcome the limitations of conventional Raman spectroscopy, i.e., the weakness of the signals and the intense fluorescence background. In the artistic field, a noninvasive approach is recommended; however, SERS is still an inherently invasive method, requiring the extraction of the analyte or close contact with the object and wet substrate. Inexpensive and easy-to-produce substrates allowing for dry-state measurements were fabricated, exploiting only the electromagnetic interaction between a nanostructured substrate and the dye molecules absorbed onto a textile. To this aim, different substrates were developed starting from two colloids (silver nanospheres and nanostars) immobilized onto a functionalized microscope glass slide, and some parameters connected to their synthesis were optimized to obtain a great enhancement of the signal in dry conditions. Finally, dry-state SERS spectra of four different dyes were successfully obtained from reference dyed wool threads
Studio della pericolosità per frana a scala provinciale: il caso della Provincia di Varese
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Industrial policy and artisan firms in Italy (1945-1971)
No full textThis paper shows that after the Second World War the Italian State carried out an artisanship policy of an extent that was unparalleled in Europe. This policy was based on the provision, on the one hand, of lower tax and employers' contributions and welfare benefits at reduced premiums and, on the other, hand, of 'substitutive factors': soft loans, services and promotional initiatives by state agencies. Such an artisan policy played a twofold role: partly 'defensive', protecting a segment of marginal firms, and partly 'proactive', prompting the modernisation and innovation of more promising firms
Identification of Synthetic Organic Pigments in Contemporary Artists' Paints by FT-IR and FT-Raman: An Advanced Analytical Experiment
No full textThe identification of coloring substances is a relevant task in the field of conservation and restoration, but it can be challenging as in real samples the target analytes are inserted in a very complex matrix made of binders and additives. Understanding this concept is fundamental for upper-division undergraduate students interested in conservation science; therefore, this laboratory experiment aims to make students aware of this problem and leads them to develop a simple protocol combining two spectroscopic techniques, FT-IR and FT-Raman, and basic chemical treatments to overcome this difficulty. The case of the two quinacridone pigments, PR122 and PV19, is presented and discussed, although the same approach can be extended to other commercially available organic pigments
Long-term evaluation of the molar movements following Pendulum and fixed appliances.
No full textTo describe the molar movements and skeletal changes associated with Pendulum-fixed appliance treatment and the long-term postretention period.The treatment sample consisted of 76 Class II patients, 35 males and 41 females. Lateral cephalograms were obtained at the start of treatment (T1); the end of distalization (T2); the end of orthodontic fixed appliance therapy (T3); and long-term observation (7 years 2 months later; T4). Mean age was 12 years 11 months at T1, 13 years 8 months at T2, 15 years 4 months at T3, and 22 years 5 months at T4. The average amount of Class II molar relationship was 3.1 mm, with a mean overjet of 5.9 mm at the beginning of treatment. A paired t-test was used to identify significant between-group differences between T2-T4 and T3-T4.Distal molar movement was obtained during the distalization phase (T2), and more than half of the distalizing effect was maintained at the end of maxillary growth (T4). Most of the relapse occurred during fixed appliance therapy (T3), whereas no significant change was detected in the postretention period (T4). The molar relationship did not show any significant difference between T2 and T4. The vertical facial dimension increased during the distalization phase (T2) and fixed appliance therapy (T3) but returned to the initial values during the postretention period (T4).The Pendulum appliance induces significant dentoalveolar effects, which can be partially maintained during the long-term period. The Class I molar relationship does not change during completion of individual growth. Increase in vertical facial dimension represents a temporary effect
Lunghezza, Similarità Fonologica e Soppressione dell'Articolazione in un compito di Memoria Immediata.
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