Daniel Swain

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The breathtaking motions of natural groups such as bird flocks and fish schools have been a major inspiration for research in the development of control algorithms for multi-robot systems. A main thrust of research in this area is to understand how the interconnections among individual behaviors result in high-performing group behaviors. In this(More)
Princeton Plasma Physics Laboratory, Princeton, NJ 08543, USA Sandia National Laboratory, Albuquerque, NM 87185, USA Columbia University, New York, NY 10027, USA Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA Massachusetts Institute of Technology, Cambridge, MA 02139, USA University of California at San Diego, San Diego, CA 92093, USA General(More)
Landfill gas (LFG) that is generated in an anaerobic environment in landfills and consists primarily of methane and carbondioxide with small amount of nitrogen and other non-methane gases, could be collected and used to produce energy either by extracting methane or using the landfill gas directly in an internal combustion engine or a gas turbine. It(More)
An effort is underway to improve the voltage standoff capabilities of ion cyclotron range of frequencies (ICRF) heating and current drive systems. One approach is to develop techniques for determining the location of an electrical breakdown (arc) when it occurs. A technique is described which uses a measurement of the reflection coefficient of a swept(More)
The National Spherical Torus Experiment has produced toroidal plasmas at low aspect ratio (A = R/a = 0.86m/0.68m ~ 1.3, where R is the major radius and a is the minor radius of the torus) with plasma currents of 1.4MA. The rapid development of the machine has led to very exciting physics results during the first full year of physics operation. Pulse lengths(More)
The study of high harmonic fast wave (HHFW) heating and current drive is being conducted on the NSTX device to determine the physics of applying RF waves at high harmonics (~ 10-20) of the ion cyclotron frequency in this high β plasma regime and to extend the performance of the NSTX plasma. The magnetic field of this low aspect ratio device is lower (≤ 0.35(More)
Echinochloa colona (L.) Link is a very problematic weed in up land and medium land rice causing significant reduction in yield. In the present investigation, laboratory and field experiments were conducted to evaluate the nature of interaction E. colona on germination and growth of the up land rice cultivar 'Vandana'. The effects of decomposing and(More)
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