27,160 research outputs found
Immersion on the Edge: A Cooperative Framework for Mobile Immersive Computing
Immersive computing (IC) technologies such as virtual reality and augmented
reality are gaining tremendous popularity. In this poster, we present CoIC, a
Cooperative framework for mobile Immersive Computing. The design of CoIC is
based on a key insight that IC tasks among different applications or users
might be similar or redundant. CoIC enhances the performance of mobile IC
applications by caching and sharing computation-intensive IC results on the
edge. Our preliminary evaluation results on an AR application show that CoIC
can reduce the recognition and rendering latency by up to 52.28% and 75.86%
respectively on current mobile devices.Comment: This poster has been accepted by the SIGCOMM in June 201
Synthesis of a basket-shaped C56H38 hydrocarbon as a precursor toward an end-cap template for (6,6) carbon nanotubes
A basket-shaped C56H38 hydrocarbon (70) possessing a 30-carbon difluorenonaphthacenyl core that can be mapped onto the surface of C78 was synthesized from 4-bromo-1-indanone. The first stage of the synthesis involved the preparation of tetraketone 3 as a key intermediate.;The use of cascade cyclization reactions of benzannulated enyne-allenes as key features in the next stage of the synthetic sequence provides an efficient route to 70 from 4-bromo-1-indanone in 12 steps. The all- cis relationship among the methyl groups and the methine hydrogens causes the two benzofluorenyl units in 70 to be in an essentially perpendicular orientation to each other. Hydrocarbon 70 and its derivatives could serve as attractive precursors leading to a geodesic C68H26 end-cap template for (6,6) carbon nanotubes
Gluon GPDs and Exclusive Photoproduction of a Quarkonium in Forward Region
Forward photoproduction of can be used to extract Generalized Parton
Distributions(GPD's) of gluons. We analyze the process at twist-3 level and
study relevant classifications of twist-3 gluon GPD's. At leading power or
twist-2 level the produced is transversely polarized. We find that at
twist-3 the produced is longitudinally polarized. Our study shows that
in high energy limit the twist-3 amplitude is only suppressed by the inverse
power of the heavy quark mass relatively to the twist-2 amplitude. This
indicates that the power correction to the cross-section of unpolarized
can have a sizeable effect. We have also derived the amplitude of the
production of at twist-3, but the result contains end-point
singularities. The production of other quarkonia has been briefly discussed.Comment: Discussions of results are adde
Validity of single-channel model for a spin-orbit coupled atomic Fermi gas near Feshbach resonances
We theoretically investigate a Rashba spin-orbit coupled Fermi gas near
Feshbach resonances, by using mean-field theory and a two-channel model that
takes into account explicitly Feshbach molecules in the close channel. In the
absence of spin-orbit coupling, when the channel coupling between the
closed and open channels is strong, it is widely accepted that the two-channel
model is equivalent to a single-channel model that excludes Feshbach molecules.
This is the so-called broad resonance limit, which is well-satisfied by
ultracold atomic Fermi gases of Li atoms and K atoms in current
experiments. Here, with Rashba spin-orbit coupling we find that the condition
for equivalence becomes much more stringent. As a result, the single-channel
model may already be insufficient to describe properly an atomic Fermi gas of
K atoms at a moderate spin-orbit coupling. We determine a characteristic
channel coupling strength as a function of the spin-orbit coupling
strength, above which the single-channel and two-channel models are
approximately equivalent. We also find that for narrow resonance with small
channel coupling, the pairing gap and molecular fraction is strongly suppressed
by SO coupling. Our results can be readily tested in K atoms by using
optical molecular spectroscopy.Comment: 6 pages, 6 figure
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