6,867 research outputs found
Rigidity for actions on the interval arising from hyperbolicity I: solvable groups
We consider Abelian-by-cyclic groups for which the cyclic factor acts by
hyperbolic automorphisms on the Abelian subgroup. We show that if such a group
acts faithfully by diffeomorphisms of the closed interval with no global
fixed point at the interior, then the action is topologically conjugated to
that of an affine group. Moreover, in case of non-Abelian image, we show a
rigidity result concerning the multipliers of the homotheties, despite the fact
that the conjugacy is not necessarily smooth. Some consequences for
non-solvable groups are proposed. In particular, we give new proofs/examples
yielding the existence of finitely-generated, locally-indicable groups with no
faithful action by diffeomorphisms of the interval.Comment: A more detailed proof of Proposition 4.15 adde
Search for charginos, neutralinos, and gravitinos at LEP
The hep-ex data base was decided not to be an appropriate place to make
DELPHI notes public. Sorry for the inconvenience.Comment: the paper should not have been made publi
Combination of DROOL rules and Protégé knowledge bases in the ONTO-H annotation tool
ONTO-H is a semi-automatic collaborative tool for the semantic annotation of documents, built as a Protégé 3.0 tab plug-in. Among its multiple functionalities aimed at easing the document annotation process, ONTO-H uses a rule-based system to create cascading annotations out from a single drag and drop operation from a part of a document into an already existing concept or instance of the domain ontology being used for annotation. It also gives support to the detection of name conflicts and instance duplications in the creation of the annotations. The rule system runs on top of the open source rule engine DROOLS and is connected to the domain ontology used for annotation by means of an ad-hoc programmed Java proxy
LabVIEW-based control and acquisition system for the dosimetric characterization of a silicon strip detector
Theaimofthisworkistopresentanewdataacquisition,control,andanalysissoftwaresystemwrittenin LabVIEW.Thissystemhasbeendesignedtoobtainthedosimetryofasiliconstripdetectorinpolyethylene. It allows the full automation of the experiments and data analysis required for the dosimetric characterization of silicon detectors. It becomes a useful tool that can be applied in the daily routine check of a beam accelerator.MINECO ICTI2013-2016/FPA2013-47327-C2-1-RMINECO ICTI2013-2016/FPA2014-53290-C2-2- PJunta de Andalucía P12-FQM-160
Identification of descendants of an extinct bovine population from the Algarve region of Portugal using numerical taxonomy analysis of morphological traits
The morphology of a sample of four bulls and 43 cows, presumed to be
descendants of the extinct cattle breed ‘Algarvia’ (AG), was used to
assign their relationship with animals from other Portuguese autochthonous
breeds – Arouquesa (AR), Barrosa˜ (BA), Cachena (CA), Marinhoa
(MA), Maronesa (MO), Minhota (MN), Mirandesa (MI), (only bulls),
Alentejana (AL), Garvonesa (GA), Mertolenga (ME) and Preta (PR).
Standard numerical taxonomic methods were applied to a set of 183
(cows) and 170 (bulls) traits, to derive average pairwise taxonomic distances
among the sample of 257 cows and 76 bulls. Distance coefficients
(morphological index of distance) ranged from 0.22 to 2.62 (cows) and
from 0.49 to 2.13 (bulls). Unweighted pair group method using arithmetic
averages (UPGMA)-based phenograms and a principal coordinate
analysis showed that bulls were highly clustered and cows showed a
tendency to cluster according to their geographical and breed origin.
The AG population grouped together with GA, AL, ME and MN breeds
in the Red Convex group. The average taxonomic distance among
breeds was 1.02, the highest being 1.39 (ME versus BA) and the lowest
being 0.64 (MA versus AR). The approach allowed for the identification
of a phenotypically differentiated set of animals, comprising 19 cows
and four bulls representative of the AG breed, and which can be targeted
in further studies aiming at the recovery of this extinct breed
Changes in serotypes causing invasive pneumococcal disease (2005–2007 vs. 1997–1999) in children under 2 years of age in a population with intermediate coverage of the 7-valent pneumococcal conjugated vaccine
AbstractSerotypes causing invasive pneumococcal disease (IPD) in children aged <2 years in Catalonia (Spain) before and after licensing of the 7-valent pneumococcal conjugated vaccine (7vPCV) were assessed, using samples taken during 1997–1999 and 2005–2007 respectively. The distribution of serotypes causing IPD within these groups was obtained by serotyping strains sent by 22 Catalan hospitals to the Carlos III Health Institute, Madrid. Between 1997–99 and 2005–2007, the proportion of vaccine serotypes causing IPD in Catalonia fell from 70.54% to 31.67% (p <0.0001). The proportion of vaccine-related serotypes, mainly serotype 19A, increased from 9.82% to 32.50% (p <0.0001). The proportion of non-vaccine, non-related serotypes (serotypes not related to vaccine serotypes) rose from 19.64% to 35.83% (p <0.05). Within this group, the proportions of serotype 24F increased significantly. There has been a change in the distribution of serotypes isolated from cases of IPD in children <2 years old in Catalonia, comprising a reduction in the proportion of 7-valent vaccine serotypes, a rise in vaccine-related serotypes, especially 19A, and a smaller rise in non-vaccine, non-related serotypes, especially serotype 24F. A new 13-valent vaccine will cover 77.91% of the serotypes causing IPD in children <2 years old in Catalonia from 2005 to 2007
Microscopic reversal magnetization mechanisms in CoCrPt thin films with perpendicular magnetic anisotropy: fractal structure versus labyrinth stripe domains
Sem informaçãoThe magnetization reversal of CoCrPt thin films has been examined as a function of thickness using magneto-optical Kerr effect (MOKE) microscopy and first-order reversal curves (FORC) techniques. MOKE images show differentiated magnetization reversal regimes for different film thicknesses: while the magnetic domains in 10-nm-thick CoCrPt film resemble a fractal structure, a labyrinth stripe domain configuration is observed for 20-nm-thick films. Although FORC distributions for both cases show two main features related to irreversible processes (propagation and annihilation fields) separated by a mostly flat region, this method can nonetheless distinguish which magnetization reversal process is active according to the horizontal profile of the first FORC peak, or propagation field. A single-peak FORC profile corresponds to the fractal magnetization reversal, whereas a flat-peak FORC profile corresponds to the labyrinth magnetization reversal.961815Sem informaçãoSem informaçãoSem informaçãoThis work was supported by Spanish Grants No. AEI FIS2013-45469 and No. AEI FIS2016-76058, and UE FEDER “Una manera de hacer Europa”, the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant Agreement No. 734801. D.N. thanks Fundaçao para a Ciência e Tecnologia (Contract No. IF/01191/2013) for financial support
Microscopic reversal magnetization mechanisms in CoCrPt thin films with perpendicular magnetic anisotropy: Fractal structure versus labyrinth stripe domains
The magnetization reversal of CoCrPt thin films has been examined as a function of thickness using magneto-optical Kerr effect (MOKE) microscopy and first-order reversal curves (FORC) techniques. MOKE images show differentiated magnetization reversal regimes for different film thicknesses: while the magnetic domains in 10-nm-thick CoCrPt film resemble a fractal structure, a labyrinth stripe domain configuration is observed for 20-nm-thick films. Although FORC distributions for both cases show two main features related to irreversible processes (propagation and annihilation fields) separated by a mostly flat region, this method can nonetheless distinguish which magnetization reversal process is active according to the horizontal profile of the first FORC peak, or propagation field. A single-peak FORC profile corresponds to the fractal magnetization reversal, whereas a flat-peak FORC profile corresponds to the labyrinth magnetization reversal
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