A P S Khanna

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A Cartesian grid method for computing flows with complex immersed, moving boundaries is presented. The flow is computed on a fixed Cartesian mesh and the solid boundaries are allowed to move freely through the mesh. A mixed Eulerian– Lagrangian framework is employed, which allows us to treat the immersed moving boundary as a sharp interface. The(More)
PURPOSE Filling-in is not homogeneous across the visual field; rather, fading time (FT) varies with eccentricity and polar angle. The reasons for this are unclear. The authors investigated FT along horizontal and vertical meridians in central and peripheral visual fields for luminance-defined targets, comparing Weber contrast sensitivity (CSw). They also(More)
We present a demonstration of coherent homodyne transmission using 2-PSK at 10Gbit/s, with commercial optical components, which leads to new compact integrated receivers and new transmission formats, thus opening new possibilities for future optical systems. Introduction In most telecommunication fields outside the optical scenario, transmission systems are(More)
There is a mighty big difference between good, sound reasons and reasons that sound good. Hypotheses are nets: only he who casts will catch. —Novalis (as quoted by Karl Popper in The Logic of Scientific Discovery) Judge by quality and engagement with the central ideas of a science, not by employment of the maximally fashionable machinery or jargon. Abstract(More)
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