Deficits or atypicalities in attention have been reported in individuals with autism spectrum disorder (ASD), yet no consensus on the nature of these deficits has emerged. We conducted three experiments that paired a peripheral precue with a covert discrimination task, using protocols for which the effects of covert exogenous spatial attention on early vision have been well established in typic...

In this paper, a new class of frequency hopping sequences (FHSs) of length p is constructed by using Ding-Helleseth generalized cyclotomic classes of order 2, of which the Hamming autoand crosscorrelation functions are investigated (for the Hamming cross-correlation, only the case p ≡ 3 (mod 4) is considered). It is shown that the set of the constructed FHSs is optimal with respect to the avera...

In this paper, using the theory of polynomial residue class rings, a new construction is proposed for frequency hopping patterns having optimal Hamming autocorrelation with respect to the well-known Lempel-Greenberger bound. Based on the proposed construction, many new Peng-Fan optimal families of frequency hopping sequences are obtained. The parameters of these sets of frequency hopping sequen...

One of the ubiquitous features of real-life turbulent flows is the existence and persistence of coherent vortices. Here we show that such coherent vortices can be extracted as clusters of Lagrangian trajectories. We carry out the clustering on a weighted graph, with the weights measuring pairwise distances of fluid trajectories in the extended phase space of positions and time. We then extract ...

Owing to the conspicuousness of ultraviolet (UV) colour in dark environments, natural selection might have selected UV egg coloration because it would enhance egg detectability by parents in murky nests. Here, we tested this hypothesis by using comparative and experimental approaches. First, we studied variation in egg coloration of 98 species of European passerines measured using UV-visible re...