307 research outputs found
Ettore Majorana a Napoli: la testimonianza dell’allieva Gilda Senatore
No full textGilda Senatore seguì come studentessa il corso di Fisica Teorica che Ettore Majorana, a seguito della nomina a professore ordinario presso la Regia Università di Napoli, svolse tra il 13 Gennaio e la fine di Marzo del 1938 (prima di scomparire in circostanze non ancora chiarite). A lei Majorana lasciò un gruppo di fogli manoscritti, che ora sono depositati presso la Domus Galileiana di Pisa e che sono stati riprodotti nel volume E. Majorana, Lezioni all'Università di Napoli. In questo lavoro è riportata una testimonianza di questa allieva di Majorana che riguarda sia il corso di Fisica Teorica, sia i fogli manoscritti, e che fa piena chiarezza sul numero e sul nome di coloro che erano presenti alle lezioni. Per motivi di completezza, la testimonianza è accompagnata da un nota (a cura di F. Guerra e N. Robotti) sull'attività scientifica e accademica di Majorana, comprensiva anche di un elenco aggiornato delle sue pubblicazioni
How spatial structuring abilities support the development of long term effective mental calculation strategies
No full textThis paper concerns an on-going research, developed from 2013, aimed to support the
development of effective mental calculation strategies along the time. This research is
developed with a group of thirty teachers, both of kindergarten and primary school, and
a researcher (the author). For this, it’s a research starting with the development of
numerical abilities (such as decomposing the number into parts) through spatial
structuring abilities (such as spatial visualization of objects) already in kindergarten, in
order to support effective strategies in mental calculation, in primary school. We present
the analysis of results of a pilot study, carried out with children attending grade 1, and a
survey, carried out with children attending the grade 3. The educational activities, which
reveal a multimodal approach to numbers and arithmetical, have been presented in
others research reports and they'll not discussed in this paper ( Robotti, 2018). Findings
of the pilot study and the survey show that the effectiveness of the calculation strategies
(in terms of response time, adequacy and of correctness) seems depending on the kind
of activities developed in kindergarten and primary school. Our findings indicate that
the calculation strategies can be considered stable over the time and, therefore, the
acquisition of adequate skills for mental calculation in kindergarten and first class of
primary school (for instance decomposing numbers into parts and memorizing
arithmetical facts) can be considered a sort of "heritage" for students because it can be
exploited to effective calculation even after the grade 1
The lost notebook of Enrico Fermi: the true story of the discovery of neutron-induced radioactivity
No full textThis book tells the curious story of an unexpected finding that sheds light on a crucial moment in the development of physics: the discovery of artificial radioactivity induced by neutrons. The finding in question is a notebook, clearly written in Fermi's handwriting, which records the frenzied days and nights that Fermi spent experimenting alone, driven by his theoretical ideas on beta decay. The notebook was found by the authors while browsing through documents left by Oscar D'Agostino, the chemist among Fermi's group. From Fermi's notes, they reconstruct with skill and expertise the detailed timeline of the critical days leading up to his vital discovery. While much is already known about the road that led Fermi to his important result, this is the first time that it has been possible to reconstruct precisely when and how the initial evidence of neutron-induced decay was obtained. In relating this fascinating story, the book will be of great interest not only to those with a passion for the history of science but also to a wider audience
Diphascon (Diphascon) ramazzottii Robotti 1970
No full textDiphascon (Diphascon) ramazzottii (Robotti, 1970) Material examined. Biserov’s collection, slide No. 1579: mountain pass Angarsky (approx. 44 ° 45 ʹ N, 34 ° 20 ʹ E). The species, new for the Uraine, was recorded from Europe (Italy, Russia) and North America.Published as part of Pilato, Giovanni, Kiosya, Yevgen, Lisi, Oscar, Inshina, Valentina & Biserov, Vladimir, 2011, Annotated list of Tardigrada records from Ukraine with the description of three new species, pp. 1-31 in Zootaxa 3123 on page 16, DOI: 10.5281/zenodo.27939
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