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Molecular dynamics (MD) simulations are performed to model an electrospray thruster for the ionic liquid (IL) EMIM-BF4 using a coarse-grained (CG) potential. A one-dimensional electric field was computed by the use of a Particle-In-Cell (PIC) solver and coupled to the MD program. The electrical extrusion of the IL was studied for different electric field strengths and mass flow rates. The MD simulations...
In this paper, we discuss results from direct simulation Monte Carlo (DSMC) modeling of hollow cathode magnetron (HCMs) for deposition of Cu. DSMC provides the possibility of an exact solution of Boltzmann's gas dynamic equation, and so should be applicable to lower pressures than conventional computational techniques. To obtain plasma source functions, electric potentials and magnetic fields, the...
Selfish participants in a distributed system attempt to gain from the system without regard to how their actions may affect others. To maintain desirable system-wide properties in the presence of selfish users, designers are increasingly turning to the powerful mechanisms offered by economics and game theory. Combining the two fields of economics and systems design introduces new challenges of achieving...
The pilot workshop was a success in that it met the program objectives. The participants were engaged not only in the construction of the buoy, but in the potential of the BOB concept both for undergraduate and precollege ocean sciences. Another criterion of success is the continuation of the dialogue among the participants and the continuation of the application of the workshop in other situations.
We study the throughput capacity of wireless networks which employ (asynchronous) random-access scheduling as opposed to deterministic scheduling. The central question we answer is: how should we set the channel-access probability for each link in the network so that the network operates close to its optimal throughput capacity? We design simple and distributed channel-access strategies for random-access...
We advocate the use of point sets to represent shapes. We provide a definition of a smooth manifold surface from a set of points close to the original surface. The definition is based on local maps from differential geometry, which are approximated by the method of moving least squares (MLS). We present tools to increase or decrease the density of the points, thus, allowing an adjustment of the spacing...
Given (n-1)-dimensional parallel cross-sections of an n-dimensional body, one would like to reconstruct the n-dimensional body. The method based on Distance Field Interpolation (DFI) gives a robust solution to this problem in its ability to deal with any topology in any dimension. Still this method may give undesired solutions to the problem if the changes from one cross-section to the next are significant...
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