Articoli rivista
Anno XLII - n.3 - luglio/settembre 2009 Il trasporto dell’acqua fino alla cima degli alberi
The system of conduits found in a tree is far larger and more complex than any human-constructed microfluidic system. […]
Anno XXVI - n.2 - aprile/giugno 1993 Il valore efficace della corrente alternata
This article describes an experiment to show the reason why alternating currents are rated according to their heating power (for sinusoidal currents, the r.m.s. value). The luminosities of a 6V filament lamp are compared when it is powered by a battery and by a transformer, […]
Anno XXXVI - n.4 - ottobre/dicembre 2003 Immagini da risonanza magnetica nucleare in medicina
Over the past twenty years, magnetic resonance imaging (MRI) has become one of the most important imaging modalities available to clinical medicine. It offers great technical flexibility, and is free of the hazards associated with ionizing radiation. In addition to its role as a routine imaging technique with a growing range of clinical applications, […]
Anno XLIV - n.3 - luglio/settembre 2011 Immagini dall’invisibile
The students are guided to take infrared photos with a modified computer webcam, and to understand why on the monitor figures can be shown, which are invisible for the eye. […]
Anno XXV - n.4 - ottobre/dicembre 1992 Immagini del sapere e formazione scientifica
This article discusses what conceptions of knowledge are basic to the performance of scientific activities. It explores the complexity of the processes by which scientific knowledge is built and their relationship with the affective domain and with common sense knowledge. It examines the implications of a totally constructivist perspective on science learning, […]
Anno XLII - n.3 - luglio/settembre 2009 Immagini fotografiche di una ruota di bicicletta
The analysis of the kinematics of a wheel that rolls on a level ground requires highschool maths. It suggests an easy and interesting lab activity suited to highschool students. […]