664 research outputs found
Recent Progress of RF Cavity Study at Mucool Test Area
In order to develop an RF cavity that is applicable for a muon beam cooling
channel, a new facility, called Mucool Test Area (MTA) has been built at
Fermilab. MTA is a unique facility whose purpose is to test RF cavities in
various conditions. There are 201 and 805 MHz high power sources, a 4-Tesla
solenoid magnet, a cryogenic system including a Helium liquifier, an explosion
proof apparatus to operate gaseous/liquid Hydrogen, and a beam transport line
to send an intense H- beam from the Fermilab Linac accelerator to the MTA hall.
Recent activities at MTA will be discussed in this document.Comment: 4 pp. 13th International Workshop on Neutrino Factories, Superbeams
and Beta beams (NuFact11) 1-6 Aug 2011: Geneva, Switzerlan
Numerical Simulation of Alveolar Bone Regeneration and Angiogenesis - Trabecular Bone Formation
Alveolar bone is the substance that supports teeth. Regeneration of alveolar bone after tooth extraction is known to be adaptive and requires Ca2+, which is secreted from local blood vessels. Thus, there is a strong relation between alveolar bone regeneration and both angiogenesis and Ca2+ secreted from blood vessels. In addition, bone formation is affected by the mechanical force around it and by shape remodeling by osteoblasts and osteoclasts. Therefore, in this study, an angiogenesis model, a Ca2+ transport model, a stress analysis model, and a reactiondiffusion model are constructed and calculated at the same time as a coupled analysis model of trabecular bone formation. Thus, our final bone regeneration model is constructed using the above factors and compared with data and images of the actual phenomena.The 7th International Conference on Mechanical Engineering (TSME-ICoME 2016), 13-16 December 2016, Chiang Mai, Thailand
Semi-Static Hedging Based on a Generalized Reflection Principle on a Multi Dimensional Brownian Motion
On a multi-assets Black-Scholes economy, we introduce a class of barrier
options. In this model we apply a generalized reflection principle in a context
of the finite reflection group acting on a Euclidean space to give a valuation
formula and the semi-static hedge.Comment: Asia-Pacific Financial Markets, online firs
Dynamics and mechanisms of clonal expansion of HIV-1-infected cells in a humanized mouse model.
Combination anti-retroviral therapy (cART) has drastically improved the clinical outcome of HIV-1 infection. Nonetheless, despite effective cART, HIV-1 persists indefinitely in infected individuals. Clonal expansion of HIV-1-infected cells in peripheral blood has been reported recently. cART is effective in stopping the retroviral replication cycle, but not in inhibiting clonal expansion of the infected host cells. Thus, the proliferation of HIV-1-infected cells may play a role in viral persistence, but little is known about the kinetics of the generation, the tissue distribution or the underlying mechanism of clonal expansion in vivo. Here we analyzed the clonality of HIV-1-infected cells using high-throughput integration site analysis in a hematopoietic stem cell-transplanted humanized mouse model. Clonally expanded, HIV-1-infected cells were detectable at two weeks post infection, their abundance increased with time, and certain clones were present in multiple organs. Expansion of HIV-1-infected clones was significantly more frequent when the provirus was integrated near host genes in specific gene ontological classes, including cell activation and chromatin regulation. These results identify potential drivers of clonal expansion of HIV-1-infected cells in vivo
Homo-chiral crystal growth and mono-chiral helimagnetism in inorganic chiral magnetic compounds
Trabajo presentado al International Workshop on Multipole Physics and Related Phenomena (J-Physics), celebrado en Hachimantai, Iwate (Japón) del 24 al 28 de septiembThis work was supported by JSPS KAKENHI Grant Number 25220803, 25390139, 26108719, 15H03680, 15H05885, 15H05886, 16KK0102, 17H02912, 17H02767, and 17H02815. JC acknowledges the Grant Number MAT2015-68200-C2-2-P from the Spanish Ministry of Economy and Competitiveness.Peer Reviewe
Multifractal Dimensions for Branched Growth
A recently proposed theory for diffusion-limited aggregation (DLA), which
models this system as a random branched growth process, is reviewed. Like DLA,
this process is stochastic, and ensemble averaging is needed in order to define
multifractal dimensions. In an earlier work [T. C. Halsey and M. Leibig, Phys.
Rev. A46, 7793 (1992)], annealed average dimensions were computed for this
model. In this paper, we compute the quenched average dimensions, which are
expected to apply to typical members of the ensemble. We develop a perturbative
expansion for the average of the logarithm of the multifractal partition
function; the leading and sub-leading divergent terms in this expansion are
then resummed to all orders. The result is that in the limit where the number
of particles n -> \infty, the quenched and annealed dimensions are {\it
identical}; however, the attainment of this limit requires enormous values of
n. At smaller, more realistic values of n, the apparent quenched dimensions
differ from the annealed dimensions. We interpret these results to mean that
while multifractality as an ensemble property of random branched growth (and
hence of DLA) is quite robust, it subtly fails for typical members of the
ensemble.Comment: 82 pages, 24 included figures in 16 files, 1 included tabl
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