23,673 research outputs found
A spark-resistant bulk-micromegas chamber for high-rate applications
We report on the design and performance of a spark-resistant bulk-micromegas
chamber. The principle of this design lends itself to the construction of
large-area muon chambers for the upgrade of the detectors at the Large Hadron
Collider at CERN for luminosities in excess of 10**34/cm2/s or other high-rate
applications.Comment: 12 pages, 13 figure
Caracterização dos solos do município de Belterra, Estado do Pará.
bitstream/item/63490/1/Oriental-Doc88.pdfAnexo mapa: Mapa de solos do Município de Belterra - Pará
PCA Tomography and its application to nearby galactic nuclei
With the development of modern technologies such as IFUs, it is possible to
obtain data cubes in which one produces images with spectral resolution. To
extract information from them can be quite complex, and hence the development
of new methods of data analysis is desirable. We briefly describe a method of
analysis of data cubes (data from single field observations, containing two
spatial and one spectral dimension) that uses Principal Component Analysis
(PCA) to express the data in the form of reduced dimensionality, facilitating
efficient information extraction from very large data sets. We applied the
method, for illustration purpose, to the central region of the low ionization
nuclear emission region (LINER) galaxy NGC 4736, and demonstrate that it has a
type 1 active nucleus, not known before. Furthermore, we show that it is
displaced from the centre of its stellar bulge.Comment: 4 pages, 1 figure, 1 table, to be published in the Proceedings of the
IAU Symposium no. 26
Efeito da época de semeadura e de tratos culturais na produtividade do feijoeiro em Altamira, Pará.
bitstream/item/48880/1/Boletim-Pesquisa-196-CPATU.pd
The mathematical description of the electrosynthesis of composites of oxy-hydroxycompounds cobalt with polypyrrole overooxidazed
The electrosynthesis of the composite with of the overoxidized polypyrrole with cobalt oxy-hydroxide in strongly acidic media has been described mathematically, using linear stability theory and bifurcation analysis. The steadystates stability conditions and oscillatory and monotonic instability requirements have been described too. The system´s behavior was compared with behavior of other systems with overoxidation, electropolymerization of heterocyclic compounds and electrosynthesis of the cobalt oxy-hydroxides
- …