63,560 research outputs found
Dynamic radiation force of acoustic waves on solid elastic spheres
The present study concerns the dynamic radiation force on solid elastic
spheres exerted by a plane wave with two frequencies (bichromatic wave)
considering the nonlinearity of the fluid. Our approach is based on solving the
wave scattering for the sphere in the quasilinear approximation within the
preshock wave range. The dynamic radiation force is then obtained by
integrating the component of the momentum flux tensor at the difference of the
primary frequencies over the boundary of the sphere. Results reveal that
effects of the nonlinearity of the fluid plays a major role in dynamic
radiation force leading it to a parametric amplification regime. The developed
theory is used to calculate the dynamic radiation force on three different
solid spheres (aluminium, silver, and tungsten). Resonances are observed in the
spectrum of the force on the spheres. They have larger amplitude and better
shape than resonances present in static radiation force.Comment: 9 pages, 4 figures, to appear in Physical Review
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An Investigation into the Effect of the Shell on SALM Processed Parts
Shell Assisted Layer Manufacturing (SALM) is a novel process for rapid prototyping/
tooling/ manufacture (RP/RT/RM) which is presently undergoing feasibility studies. SALM is
based on layered manufacturing technology (LMT). Initially it develops the shell (boundaries)
of a selected layer using a technique similar to fused deposition modelling (FDM). The
developed shell is filled with a UV curable resin and is exposed to UV radiation for curing.
This procedure is repeated until the complete part is built. This paper compares and contrasts
properties of parts made using two options available with the SALM technique: building the
part using a soluble shell (FDM support structure material, finally dissolved to recover the
part); or using a polymer material such as ABS that is bonded with the resin whilst making
the part.Mechanical Engineerin
Meson production in two-photon interactions at energies available at CERN Large Hadron Collider
The meson production cross sections are estimated considering photon-photon
interactions in hadron - hadron collisions at CERN LHC energies. We consider a
large number of mesons with photon-photon partial decay width well constrained
by the experiment and some mesons which are currently considered as hadronic
molecule and glueball candidates. Our results demonstrate that the experimental
analysis of these states is feasible at CERN - LHC.Comment: 5 pages, 1 figure, 4 tables. Version published in Physical Review
The pion mass dependence of the nucleon form-factors of the energy momentum tensor in the chiral quark-soliton model
The nucleon form factors of the energy-momentum tensor are studied in the
large-Nc limit in the framework of the chiral quark-soliton model for model
parameters that simulate physical situations in which pions are heavy. This
allows for a direct comparison to lattice QCD results.Comment: 17 pages, 12 figure
O feijão-caupi para processamento industrial e exportação.
O feijĂŁo-caupi (Vigna unguiculada (L.) Walp.) Ă© uma leguminosa amplamente adaptada, versátil e nutritiva, devido ao seu conteĂşdo protĂ©ico e energĂ©tico, sendo cultivado em diversas partes do mundo, proporcionando emprego e renda para milhares de pessoas.bitstream/item/64593/1/Caupi-agrosoft.pdfDisponĂvel tambĂ©m nos seguintes endereços: http://www.portaldoagronegocio.com.br/index.php?p=texto&&idT=1136; http://www.maxpress.com.br/noticia-boxsa.asp?TIPO=PA&SQINF=292871; http://www.zoonews.com.br/noticias2/noticia.php?idnoticia=126209 ; http://www.paginarural.com.br/artigos_detalhes.php?id=1594; Comunique-se O Portal da comunicação; Agrosoft Brasil
A guided search non-dominated sorting genetic algorithm for the multi-objective university course timetabling problem
Copyright @ Springer-Verlag Berlin Heidelberg 2011.The university course timetabling problem is a typical combinatorial optimization problem. This paper tackles the multi-objective university course timetabling problem (MOUCTP) and proposes a guided search non-dominated sorting genetic algorithm to solve the MOUCTP. The proposed algorithm integrates a guided search technique, which uses a memory to store useful information extracted from previous good solutions to guide the generation of new solutions, and two local search schemes to enhance its performance for the MOUCTP. The experimental results based on a set of test problems show that the proposed algorithm is efficient for solving the MOUCTP
First-order sidebands in circuit QED using qubit frequency modulation
Sideband transitions have been shown to generate controllable interaction
between superconducting qubits and microwave resonators. Up to now, these
transitions have been implemented with voltage drives on the qubit or the
resonator, with the significant disadvantage that such implementations only
lead to second-order sideband transitions. Here we propose an approach to
achieve first-order sideband transitions by relying on controlled oscillations
of the qubit frequency using a flux-bias line. Not only can first-order
transitions be significantly faster, but the same technique can be employed to
implement other tunable qubit-resonator and qubit-qubit interactions. We
discuss in detail how such first-order sideband transitions can be used to
implement a high fidelity controlled-NOT operation between two transmons
coupled to the same resonator.Comment: 15 pages, 5 figure
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