681 research outputs found
GNUsmail: Open framework for on-line email classification
Real-time classification of massive email data is a challenging task that presents its own particular difficulties. Since email data presents an important temporal component, several problems arise: emails arrive continuously, and the criteria used to classify those emails can change, so the learning algorithms have to be able to deal with concept drift. Our problem is more general than spam detection, which has received much more attention in the literature.
In this paper we present GNUsmail, an open-source extensible framework for email classification, which structure supports incremental and on-line learning. This framework enables the incorporation of algorithms developed by other researchers, such as those included in WEKA and MOA. We evaluate this framework, characterized by two overlapping phases (pre-processing and learning), using the ENRON dataset, and we compare the results achieved by WEKA and MOA algorithms
Dark energy survey year 3 results: weak lensing shape catalogue
ArtĂculo escrito por un elevado nĂșmero de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboraciĂłn, si le hubiere, y los autores pertenecientes a la UAMWe present and characterize the galaxy shape catalogue from the first 3 yr of Dark Energy Survey (DES) observations, over an effective area of 4143 deg2 of the southern sky. We describe our data analysis process and our self-calibrating shear measurement pipeline metacalibration, which builds and improves upon the pipeline used in the DES Year 1 analysis in several aspects. The DES Year 3 weak-lensing shape catalogue consists of 100 204 026 galaxies, measured in the riz bands, resulting in a weighted source number density of neff = 5.59 gal arcmin-2 and corresponding shape noise Ïe = 0.261. We perform a battery of internal null tests on the catalogue, including tests on systematics related to the point spread function (PSF) modelling, spurious catalogue B-mode signals, catalogue contamination, and galaxy propertie
Dark Energy Survey Year 3 results: A 2.7% measurement of baryon acoustic oscillation distance scale at redshift 0.835
ArtĂculo escrito por un elevado nĂșmero de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboraciĂłn, si le hubiere, y los autores pertenecientes a la UAMWe present angular diameter measurements obtained by measuring the position of baryon acoustic
oscillations (BAO) in an optimized sample of galaxies from the first three years of Dark Energy Survey data
(DES Y3). The sample consists of 7 million galaxies distributed over a footprint of 4100 deg2 with
0.6 < zphoto < 1.1 and a typical redshift uncertainty of 0.03 (1 + z). The sample selection is the same as in
the BAO measurement with the first year of DES data, but the analysis presented here uses three times the
area, extends to higher redshift, and makes a number of improvements, including a fully analytical BAO
template, the use of covariances from both theory and simulations, and an extensive preunblinding
protocol. We used two different statistics; angular correlation function and power spectrum, and validate
our pipeline with an ensemble of over 1500 realistic simulations. Both statistics yield compatible results.
We combine the likelihoods derived from angular correlations and spherical harmonics to constrain the
ratio of comoving angular diameter distance DM at the effective redshift of our sample to the sound horizon
scale at the drag epoch. We obtain DM(zeff = 0.835)/rd = 18.92 ± 0.51, which is consistent with, but
smaller than, the Planck prediction assuming flat ÎCDM, at the level of 2.3Ï. The analysis was performed
blind and is robust to changes in a number of analysis choices. It represents the most precise BAO distance
measurement from imaging data to date, and is competitive with the latest transverse ones from
spectroscopic samples at z > 0.75. When combined with DES 3x2pt ĂŸ SNIa, they lead to improvements
in H0 and Ωm constraints by âŒ20
Checklist of the Pleistocene marine molluscs of PraĂnha and LagoĂnhas (Santa Maria Island, Azores).
A critical review of the reported Pleistocene species of and Lagoinhas (Santa Maria Island, Azores) is provided, new data increasing the marine molluscan fauna to 95 taxa (80 Gastropoda and 15 Bivalvia). Six of the reported taxa are considered dubious
records (5 Gastropoda, 1 Bivalvia). The stratigraphic sequence of Praia Formosa is composed of two main units, about 2-4 meters above present-day sea level. In the lower unit, Patella ulyssiponensis dominates the
fossil assemblage of the basal calcareous conglomerate while Myoforceps arustatus (Dillwyn, 1817) dominates the assemblage associated to a calcareous algae mat. Above a non-depositional hiatus surface, a sandy beach deposit mainly composes the upper unit. Its fossil assemblages are dominated by large amounts of Eruilin castanea (Montagu, 1803) and, in a less extent, Lucinella diwricntn (Linnaeus, 1758) and Ensis minor (Chenu, 1843). The stratigraphic sequence of Lagoinhas, located 7.4 m above present-day sea level, is also composed of two units. A basal conglomerate is fossilized by or passes laterally to a
calcareous algae mat, dominated by Myoforceps aristatus and with abundant Calliostoma pecimens. As at Prainha, these lower units are covered by a highly fossiliferous sandy bach deposit, though thinner, in which Ervlie castanea is the dominant species. Some species with Caribbean or West African affinities, the "Strombus bubonius accompanying
fauna" (Garcia-Talavera, 1990), were found in the lower layers. The upper layer
malacofauna is mainly related to the Mediterranean faunas, similarly to what happens nowadays (Ăvila, 2000)
Non-local scattering control in coupled resonator networks
We demonstrate scattering control of Gaussian-like wave packets propagating
with constant envelope velocity and invariant waist through coupled resonator
optical waveguides (CROW) via an external resonator coupled to multiple sites
of the CROW. We calculate the analytical reflectance and transmittance using
standard scattering methods from waveguide quantum electrodynamics and show it
is possible to approximate them for an external resonator detuned to the CROW.
Our analytical and approximate results are in good agreement with numerical
simulations. We engineer various configurations using an external resonator
coupled to two sites of a CROW to show light trapping with effective
exponential decay between the coupling sites, wave packet splitting into two
pairs of identical Gaussian-like wave packets, and a non-local Mach-Zehnder
interferometer.Comment: 20 pages, 7 figure
Luria lurida (Gastropoda), a new record for the Pleistocene of Santa Maria, Azores
The cypraeid gastropod Luria lurida (Linnaeus, 1758) is reported for the first time from Pleistocene deposits at the Prainha site, on the island of Santa Maria, Azores archipelago
Microstructural and magnetic characterization of Fe- and Ir-based multilayers
Nominal [Fe(t)/Ir(tâČ)]n (M/M type), [FeOx(t)/IrOx(tâČ)]n (O/O), and [Fe(t)/IrOx(tâČ)]n (M/O) multilayers have been prepared by magnetron sputtering at room temperature. Composition, structure, and magnetic behavior have been analyzed. In the M/M samples, the Fe and Ir phases are identified as bcc and fcc, respectively. The magnetism evolves from bulklike iron to granular behavior as the thickness of the Fe layers decreases. An induced magnetic moment, ferromagnetically coupled to Fe, is observed on Ir by x-ray magnetic circular dichroism (XMCD). Besides, the presence of negative remanent magnetization is observed in the M/M samples. As for the M/O samples, the stronger affinity of iron for oxygen displaces the oxygen atoms giving rise to actual heterostructures that strongly differ from the nominal ones. For similar thickness of the two layers the Fe layer become oxidized while a mixture of metal and oxide phases is found in the Ir layer. The increase of the Fe thickness leads to a metallic Ir layer and a highly coercive (âŒ4.4 kOe) core-shell metal-oxide structure in the Fe layers.Spanish Ministry of Economy and Competitiveness (MINECO), MAT2014-54425-R, MAT2017-83468-RAragĂłn DGA NETOSHIM
Complicaciones en la anestesia general del perro : revisiĂłn de 265 casos
Un total de 265 perros fueron anestesiados por diferentes motivos diagnĂłsticos y terapĂ©uticos en los Servicios ClĂnicos de la Facultad de Veterinaria de CĂłrdoba,siguiendo diversos protocolos anestĂ©sicos
Development of backcross generations and new interspecific hybrid combinations for introgression breeding in eggplant (Solanum melongena)
[EN] Introgression breeding can contribute to broadening the genetic background of eggplant (Solanum melongena). We used six eggplant varieties and 44 interspecific hybrids between these eggplant accessions and 10 accessions of wild relatives from the primary genepool species S. insanum and secondary genepool species S. anguivi, S. dasyphyllum, S. incanum, S. lichtensteinii, and S. tomentosum to obtain first backcross generations to S. melongena. Pollen viability in cultivated and wild parents and interspecific hybrids with S. insanum was high, while for interspecific hybrids with secondary genepool species it was variable. First backcross generations to S. melongena were obtained with interspecific hybrids of all the wild species, with the best results being obtained in crosses with hybrids between S. melongena and S. insanum. However, ample differences were observed among eggplant varieties in the success of the crosses. Additionally, the six eggplant varieties were crossed with secondary genepool species S. campylacanthum, S. lidii and S. vespertilio and with tertiary genepool species S. bonariense, S. elaeagnifolium and S. sisymbriifolium with the aim of obtaining new interspecific hybrids. Successful interspecific hybridization was achieved with the three new secondary genepool species tested and, using embryo rescue, with the tertiary genepool species S. elaeagnifolium. The new backcross generations and interspecific hybrids obtained will contribute to broadening the genetic background of the eggplant and to the genetic enhancement of this crop.This work was undertaken as part of the initiative "Adapting Agriculture to Climate Change: Collecting, Protecting and Preparing Crop Wild Relatives", which is supported by the Government of Norway. The project is managed by the Global Crop Diversity Trust with the Millennium Seed Bank of the Royal Botanic Gardens, Mew and implemented in partnership with national and international gene banks and plant breeding institutes around the world. For further information see the project website: http://www.cwrdiversity.org/. This work has also been funded in part by European Union's Horizon 2020 research and innovation programme under grant agreement No. 677379 (G2P-SOL project: Linking genetic resources, genomes and phenotypes of Solanaceous crops) and from Spanish Ministerio de Economia y Competitividad and Fondo Europeo de Desarrollo Regional (grant AGL2015-64755-R from MINECO/FEDER, EU). Pietro Gramazio is grateful to Universitat Politecnica de Valencia for a pre-doctoral (Programa FPI de la UPV-Subprograma 1/2013 call) contract.Kouassi, B.; Prohens TomĂĄs, J.; Gramazio, P.; Kouassi, A.; Vilanova Navarro, S.; GalĂĄn-Ăvila, A.; Herraiz GarcĂa, FJ.... (2016). Development of backcross generations and new interspecific hybrid combinations for introgression breeding in eggplant (Solanum melongena). Scientia Horticulturae. 213:199-207. https://doi.org/10.1016/j.scienta.2016.10.039S19920721
Genotypeâphenotype correlation in patients with Usher syndrome and pathogenic variants in MYO7A: implications for future clinical trials
Purpose: We aimed to establish correlations between the clinical features of a cohort of Usher syndrome (USH) patients with pathogenic variants in MYO7A, type of pathogenic variant, and location on the protein domain. Methods: Sixty-two USH patients from 46 families with biallelic variants in MYO7A were examined for visual and audiological features. Participants were evaluated based on self-reported ophthalmological history and ophthalmological investigations (computerized visual field testing, best-corrected visual acuity, and ophthalmoscopic and electrophysiological examination). Optical coherence tomography and fundus autofluorescence imaging were performed when possible. Auditory and vestibular functions were evaluated. Patients were classified according to the type of variant and the protein domain where the variants were located. Results: Most patients displayed a typical USH1 phenotype, that is, prelingual severe-profound sensorineural hearing loss, prepubertal retinitis pigmentosa (RP) and vestibular dysfunction. No statistically significant differences were observed for the variables analysed except for the onset of hearing loss due to the existence of two USH2 cases, defined as postlingual sensorineural hearing loss, postpubertal onset of RP, and absence of vestibular dysfunction, and one atypical case of USH. Conclusion: We were unable to find a correlation between genotype and phenotype for MYO7A. However, our findings could prove useful for the assessment of efficacy in clinical trials, since the type of MYO7A variant does not seem to change the onset, severity or course of visual disease.This project was financially supported by the Center for Biomedical Network Research on Rare Diseases (CIBERER), FIS (PI16/00425, PI16/00539 and IISâFJD Biobank PT13/0010/0012). LGâM and IPR were supported by the RĂo Hortega and predoctoral Programs (CM16/00126 and FI17/00192, respectively) from Institute of Health Carlos III (ISCIII, Spanish Ministry of the Economy, Industry and Competitiveness), Regional Government of Madrid (CAM, B2017/BMD37), and Regional Government of the Valencian Community (PROMETEU/2018/135), with partial support from the European Regional Development Fund (ERDF). Additional support was received from the Ramon Areces Foundation, the University Chair UAMâIISâFJD of Genomic Medicine, ONCE Foundation and the Spanish National Organization of the Blind (ONCE). Drafting of this manuscript was possible thanks to the UshTher project (Clinical trial of gene therapy with dual AAV vectors for retinitis pigmentosa in patients with Usher syndrome type IB), which has received funding from the European Unionâs Horizon 2020 research and innovation programme under grant agreement No 754848. The authors are grateful to the families that participated in this study and to the colleagues who referred patients to us. We also thank the Genetics and Ophthalmology Departments of FundaciĂłn Jimenez Diaz University Hospital (FJD, Madrid) and AsunciĂłn GimĂ©nez, Cristina Villaverde, and Ignacio Mahillo for their technical assistance
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