We have been studying coand postseismic displacements from large earthquakes since mid-2006, using ALOS PALSAR images acquired before and after these events. Due to its wavelength, coherence is high even in heavily vegetated areas or steep ranges. We can estimate slip distribution of these earthquakes based on the observed interferograms using a nonlinear inversion scheme. So far, we could not ...

A region in an alternated pair of random-dot patterns was uniiormty displaced. It U:E perceiled ‘1s a segregated. coherently moving shape only if the displacement was smdii. The hmit on the displacement was Its absolute size (maximum about 15’) rather than the number of elements’ widths. Segregation due to apparent motion did not occur if the two patterns were exposed to diKerent eyes. These co...

The polynomial time hierarchy of Meyer and Stockmeyer has several equivalent characterizations — in particular it can be defined either in terms of polynomial time oracle Turing machines [Sto76], or in terms of polynomial time alternating Turing machines where the number of alternations is finitely bounded [CKS81]. One of the most important open questions in the area is whether or not this hier...

The first detailed quantitative observations of the two-dimensional collapse of a granular column along a horizontal channel are presented for a variety of materials. Together with the complementary study for the axisymmetric situation, we conclude that for granular collapses the generally accepted approaches, that are highly dependent on frictional parameters, do not describe the main flow phe...

Given a set of points that sample a shape, the Rips complex of the data points is often used in machine-learning to provide an approximation of the shape easily-computed. It has been proved recently that the Rips complex captures the homotopy type of the shape assuming the vertices of the complex meet some mild sampling conditions. Unfortunately, the Rips complex is generally high-dimensional. ...

Forage fish support the largest fisheries in the world but also play key roles in marine food webs by transferring energy from plankton to upper trophic-level predators, such as large fish, seabirds, and marine mammals. Fishing can, thereby, have far reaching consequences on marine food webs unless safeguards are in place to avoid depleting forage fish to dangerously low levels, where dependent...

using tidal potential, the effect of tide on the gravity field, crustal deformation due to tidal force, and gravity variations resulted from the crustal deformation are presented. tidal potential is divided into constant and periodic (diurnal and semi-diurnal) constituents, and for each constituents crustal displacements in radial, south-north, and east-west directions are computed. the aforeme...

Debate over the nature of mindreading proceeds on the assumption that theory and simulation offer distinct characterizations of this ability. The threat of collapse objection questions this assumption, suggesting that simulation collapses into theory because both are committed to mindreading as tacit knowledge. Although both sides dismiss this objection, I argue that the threat is real. Theory ...

In this paper we consider Foreman’s maximality principle, which says that any non-trivial forcing notion either adds a new real or collapses some cardinals. We prove the consistency of some of its consequences. We observe that it is consistent that every c.c.c. forcing adds a real and that for every uncountable regular cardinal κ, every κ-closed forcing of size 2<κ collapses some cardinal.