underwater target imaging using acoustic waves is possible by employing the method used in synthetic aperture radars. in recent years, synthetic aperture sonar has been the subject of several researches. wherein imaging of underwater moving target is required, inverse synthetic aperture sonar (isas) idea can be used but specifications and limitations of underwater channel should be considered. ...

The potential for using synergistic combinations of measurements from autonomous underwater vehicles (AUVs) and output from three-dimensional numerical models for studying the central California coastal region is demonstrated. Two case studies are used to illustrate the approach. In the first, propeller-driven AUV observations revealed a subsurface salinity minimum in northern Monterey Bay. A R...

Cellular automata (CA) rules can be classified automatically for a spectrum of ordered, complex, and chaotic dynamics by a measure of the variance of input-entropy over time. Rules that support interacting gliders and related complex dynamics can be identified, giving an unlimited source for further study. The distribution of rule classes in rule-space can be shown. A byproduct of the method al...

We review disruptive innovations introduced in the RoboCup 2D Soccer Simulation League over the twenty years since its inception, and trace the progress of our champion team (Gliders). We conjecture that the League has been developing as an ecosystem shaped by diverse approaches taken by participating teams, increasing in its overall complexity. A common feature is that different champion teams...

The first four Canadian laboratory-confirmed cases were isolated in May 1995. Three family members from central Alberta, a 32-year-old female and her two female children (5 and 3 years of age) presented with gastrointestinal symptoms. S. Tilene was isolated from stool specimens from these cases and also from a frequent visitor, an asymptomatic 13-year-old male. Stool samples were collected from...

A hexagonal ternary-state two-dimensional cellular automaton is designed which imitates an activator-inhibitor reaction-diffusion system, where the activator is self-inhibited in particular concentrations and the inhibitor dissociates in the absence of the activator. The automaton exhibits both stationary and mobile localizations (eaters and gliders), and generators of mobile localizations (gli...

“Infographics” is a very new RoboCup Soccer Simulation League 2D team, based on the released source code of agent2d [1] and Gliders [2,3]. It also uses librcsc (a base library for The RoboCup Soccer Simulator, RCSS [4]); soccerwindow2: a viewer program for RCSS; fedit2: a formation editor for agent2d; and GIBBS: in-browser log-player for 2D Simulation League logs [5]. The Soccer Simulation 2D L...

Abstract On 30 September 2021, a saildrone uncrewed surface vehicle (USV) was steered into Category 4 Hurricane Sam, the most intense storm of 2021 Atlantic hurricane season. It measured significant wave heights up to 14 m (maximum height 27 m) and near-surface winds exceeding 55 s −1 . This first time in more than seven decades observations that real USV transmitted scientific data, images, vi...

In the presence of noncompact symmetry, the stability of relative equilibria under momentum-preserving perturbations does not generally imply robust stability under momentum-changing perturbations. For axisymmetric relative equilibria of Hamiltonian systems with Euclidean symmetry, we investigate different mechanisms of stability: stability by energy-momentum confinement, KAM, and Nekhoroshev s...

A cellular automaton collider is a finite state machine build of rings of onedimensional cellular automata. We show how a computation can be performed on the collider by exploiting interactions between gliders (particles, localisations). The constructions proposed are based on universality of elementary cellular automaton rule 110, cyclic tag systems, supercolliders, and computing on rings. 1.