88 research outputs found
Bluetooth Accelerometer Mouse
The reason of inventing such device is to overcome problem faced in using wired mouse and also the need of a surface for its movement. It applies even for the wireless mouse
too since a surface is always a priority for its usage. This could be a hassle when users are left with limited space. In order to overcome this difficulty, this particular
wireless accelerometer based mouse is developed
Componentwise Linearity of Powers of Cover Ideals
Let be a finite simple graph and denote its vertex cover ideal in
a polynomial ring over a field. Assume that is its -th symbolic
power. In this paper, we give a criteria for cover ideals of vertex
decomposable graphs to have the property that all their symbolic powers are not
componentwise linear. Also, we give a necessary and sufficient condition on
so that is a componentwise linear ideal for some (equivalently,
for all) when is a graph such that has a
simplicial vertex for any independent set of . Using this result, we
prove that is a componentwise linear ideal for several classes of
graphs for all . In particular, if is a bipartite graph, then
is a componentwise linear ideal if and only if is a
componentwise linear ideal for some (equivalently, for all) .Comment: arXiv admin note: text overlap with arXiv:1908.1057
Bounds for the regularity of product of edge ideals
Let and be edge ideals in a polynomial ring with . In this paper, we obtain a
general upper and lower bound for the Castelnuovo-Mumford regularity of in
terms of certain invariants associated with and . Using these results,
we explicitly compute the regularity of for several classes of edge
ideals. Let be edge ideals in a polynomial ring with . Finally, we compute the precise expression for
the regularity of when and is the
edge ideal of complete graph.Comment: Pages 11, 1 figur
On-Chip Optical Transduction Scheme for Graphene Nano-Electro-Mechanical Systems in Silicon-Photonic Platform
We present a scheme for on-chip optical transduction of strain and
displacement of Graphene-based Nano-Electro-Mechanical Systems (NEMS). A
detailed numerical study on the feasibility of three silicon-photonic
integrated circuit configurations is presented: Mach-Zehnder
Interferometer(MZI), micro-ring resonator and ring-loaded MZI. An index-sensing
based technique using a Mach-Zehnder Interferometer loaded with a ring
resonator with a moderate Q-factor of 2400 can yield a sensitivity of 28
fm/sqrt(Hz), and 6.5E-6 %/sqrt(Hz) for displacement and strain respectively.
Though any phase sensitive integrated photonic device could be used for optical
transduction, here we show that optimal sensitivity is achievable by combining
resonance with phase sensitivity
Self phase modulation in Highly nonlinear hydrogenated amorphous silicon
We study self phase modulation in submicron amorphous silicon-on-insulator waveguides. We extract both the real and imaginary part of the nonlinear parameter gamma from a 1 cm long waveguide with a cross-section of 500x220nm(2). The real and imaginary part of the nonlinear parameter are found to be 767W(-1)m(-1) and -28W(-1)m(-1) respectively. The figure of merit (FOM) is found to be 3.6 times larger than the FOM in crystalline silicon (c-Si)
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