12,506 research outputs found
Miniature vibration isolator Patent
Miniature vibration isolator utilizing elastic tubing materia
Complete Genome Sequence of a Putative Densovirus of the Asian Citrus Psyllid, Diaphorina citri.
Here, we report the complete genome sequence of a putative densovirus of the Asian citrus psyllid, Diaphorina citri Diaphorina citri densovirus (DcDNV) was originally identified through metagenomics, and here, we obtained the complete nucleotide sequence using PCR-based approaches. Phylogenetic analysis places DcDNV between viruses of the Ambidensovirus and Iteradensovirus genera
Common pulse retrieval algorithm: a fast and universal method to retrieve ultrashort pulses
We present a common pulse retrieval algorithm (COPRA) that can be used for a
broad category of ultrashort laser pulse measurement schemes including
frequency-resolved optical gating (FROG), interferometric FROG, dispersion
scan, time domain ptychography, and pulse shaper assisted techniques such as
multiphoton intrapulse interference phase scan (MIIPS). We demonstrate its
properties in comprehensive numerical tests and show that it is fast, reliable
and accurate in the presence of Gaussian noise. For FROG it outperforms
retrieval algorithms based on generalized projections and ptychography.
Furthermore, we discuss the pulse retrieval problem as a nonlinear
least-squares problem and demonstrate the importance of obtaining a
least-squares solution for noisy data. These results improve and extend the
possibilities of numerical pulse retrieval. COPRA is faster and provides more
accurate results in comparison to existing retrieval algorithms. Furthermore,
it enables full pulse retrieval from measurements for which no retrieval
algorithm was known before, e.g., MIIPS measurements
Canister closing device Patent
Design and characteristics of device for closing canisters under high vacuum condition
Bounds on the derivatives of the Isgur-Wise function from sum rules in the heavy quark limit of QCD
Using the OPE and the trace formalism, we have obtained a number of sum rules
in the heavy quark limit of QCD that include the sum over all excited states
for any value of the light cloud. We show that these sum rules imply that
the elastic Isgur-Wise function is an alternate series in powers of
. Moreover, we obtain sum rules involving the derivatives of the elastic
Isgur-Wise function at zero recoil, that imply that the -th
derivative can be bounded by the -th one. For the curvature , this proves the already proposed bound . Moreover, we obtain the absolute bound for the -th derivative
, that generalizes the
results and .Comment: 9 pages, Late
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