A review on gyrotactic swimmers in turbulent flows

Many marine plankton species are motile and perform daily vertical migrations, traveling across water columns over distances of tens of meters. It is intriguing that these tiny and slow swimmers can travel in a certain direction within a turbulent environment. One way to do that is by exploiting gravitaxis, which is a form of taxis characterised by the directional movement of an organism in response to gravity. Many plankton species are able to generate a gravitational torque (e.g., due to a ...

A Solovay-like model for singular generalized descriptive set theory

Kunen's proof of the non-existence of Reinhardt cardinals opened up the research on very large cardinals, i.e., hypotheses at the limit of inconsistency. One of these large cardinals, I0, proved to have descriptive-set-theoretical characteristics, similar to those implied by the Axiom of Determinacy: if λ witnesses I0, then there is a topology for Vλ+1 that is completely metrizable and with weight λ (i.e., it is a λ-Polish space), and it turns out that all the subsets of Vλ+1 in L(Vλ+1) have ...

Maria Drudi Gambillo, between militancy and historiography, between Futurism and Informalism

Maria Drudi Gambillo (Venice 1927-Rome 1972), a pupil of Lionello Venturi, was a contemporary art historian and militant critic, among the first to undertake a work of reor-ganizing the historical artistic sources of the historical avant-gardes in Italy, but remained a somewhat in the shade due to his untimely death and, above all, largely dedicated to the construction of large catalogs. His commitment, in particular, stands out in the care of the Archives of Futurism between 1958 and 1960, a...

Reply to the letter from Manferdelli et al.: ‘Muscle O2 diffusion capacity by NIRS: a new approach in the air’