An amorphous computer is a multitude of tiny computers each with a CPU, memory, and local communication capability. An iSurface is a particular instance of an amorphous computer, an “intelligent” coasting capable of computing, sensing and some limited output. This can be regarded as a massively parallel computing system, albeit one with random structure and unreliable nodes, and, as such, is li...

We calculate both analytically and numerically the evolution of a highly rel-ativistic fireball through the stages of free expansion and coasting, and determine the dependence of the thermodynamic and radiation variables in the comoving and laboratory frames. Magnetic fields may have been important in the original impulsive event. We discuss their effect on the fireball dynamics, and consider a...

Plague came into Calcutta by sea and not by railway communication. It appeared first in 1898 in and about the British India Steam Navigation Company's wharf. Great care being exercised in Bombay in inspecting the crews of these coasting steamers, there is now very little doubt that the disease was introduced by the coming ashore of infected ships' rats. There appeared to be no imported cases of...

Instabilities for a coasting proton beam interacting with electron cloud are discussed. The electron sources are roughly classified into two categories reflecting their initial conditions: that is, the electrons produced at the chamber surface and/or at the beam position. If the beam is stable, it forms a Coulomb static potential around itself. Electrons produced near the beam position are trap...

This paper describes an on-off control scheme for minimum time maneuver of flexible spacecraft with vibration suppression during the slew. The method minimizes the maneuver time subject to constraints on residual vibration, sensitivity to modeling errors, rest-to-rest slew distance, and transient vibration amplitude. Furthermore, a solution is sought in the form of a plausible train of pulses, ...

Two-stream instabilities in intense charged particle beams, described self-consistently by the nonlinear Vlasov-Maxwell equations, are studied using a 3D multispecies perturbative particle simulation method. The newly developed beam equilibrium, stability, and transport (BEST) code is used to simulate the linear and nonlinear properties of the electron-proton (e-p) two-stream instability observ...

P. Keppler and J. Major MPI für Metallforschung, Stuttgart, Germany (Received 15 July 1997) The first results from an experiment to deflect a beam of fully stripped, ultrarelativistic Pb821 ions of 400 GeVyc per unit of charge, equivalent to 33 TeVyc, by means of a bent crystal are reported. Deflection efficiencies are as high as 14%, in agreement with theoretical estimates. In a second experim...

Characteristics of electron-cooled bunched ion beams have been studied using the particle-tracking simulation in which the space-charge force and the force induced through the transverse broadband impedance are taken into account. The beams become space-charge dominated during the bunching of coasting beams. The simulation results show that the beams meet the transverse instability which can be...