A. A. Roy

Learn More
The intracellular regulator of G protein signalling (RGS) proteins were first identified as GTPase activating proteins (GAPs) for heterotrimeric G proteins, however, it was later found that they can also regulate G protein-effector interactions in other ways that are still not well understood. There is increasing evidence that some of the effects of RGS(More)
Single-mode Ge 28 Sb 12 Se 60 strip waveguides, fabricated with thermal evaporation and lift-off, were demonstrated at 1.03 µm. The linear and nonlinear optical properties of these waveguides were shown to be similar to bulk samples, with differences attributed to small variations in composition of ~4 atomic % or less. From z-scan measurements at 1.03 µm(More)
We demonstrate an optical hitless bypass switch based on nanomechanical proximity perturbation for high-bitrate transparent networks. Embedded in a single-level π-imbalanced Mach-Zehnder interferometer, the two nanomechanical-based ∆β-directional couplers permit broadband signal rerouting on-chip, while the selected wavelength remains unaffected at all(More)
We present germanium microdisk optical resonators under a large biaxial tensile strain using a CMOS-compatible fabrication process. Biaxial tensile strain of ~0.7% is achieved by means of a stress concentration technique that allows the strain level to be customized by carefully selecting certain lithographic dimensions. The partial strain relaxation at the(More)
Today manufacturers are using fuzzy logic in everything from cameras to industrial process control. Fuzzy logic controllers are easier to design and so are cheaper to produce. Fuzzy logic captures the impreciseness inherent in most input data. Electromechanical controllers respond better to imprecise input if their behavior was modeled on spontaneous human(More)
Over the years, communication speed of networks has increased from a few Kbps to several Mbps, as also the bandwidth demand, Communication Protocols, however have not improved to that extent. With the advent of Wavelength Division Multiplexing (WDM), it is now possible to " tune " protocols to current and future demands. The purpose of this paper is to(More)
  • 1