943 research outputs found

    Linguistic evaluation of support verb constructions by OpenLogos and google translate

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    This paper presents a systematic human evaluation of translations of English support verb constructions produced by a rule-based machine translation (RBMT) system (OpenLogos) and a statistical machine translation (SMT) system (Google Translate) for five languages: French, German, Italian, Portuguese and Spanish. We classify support verb constructions by means of their syntactic structure and semantic behavior and present a qualitative analysis of their translation errors. The study aims to verify how machine translation (MT) systems translate fine-grained linguistic phenomena, and how well-equipped they are to produce high-quality translation. Another goal of the linguistically motivated quality analysis of SVC raw output is to reinforce the need for better system hybridization, which leverages the strengths of RBMT to the benefit of SMT, especially in improving the translation of multiword units. Taking multiword units into account, we propose an effective method to achieve MT hybridization based on the integration of semantico-syntactic knowledge into SMT.info:eu-repo/semantics/acceptedVersio

    Comparison of brush and biopsy sampling methods of the ileal pouch for assessment of mucosa-associated microbiota of human subjects

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    BACKGROUND: Mucosal biopsy is the most common sampling technique used to assess microbial communities associated with the intestinal mucosa. Biopsies disrupt the epithelium and can be associated with complications such as bleeding. Biopsies sample a limited area of the mucosa, which can lead to potential sampling bias. In contrast to the mucosal biopsy, the mucosal brush technique is less invasive and provides greater mucosal coverage, and if it can provide equivalent microbial community data, it would be preferable to mucosal biopsies. RESULTS: We compared microbial samples collected from the intestinal mucosa using either a cytology brush or mucosal biopsy forceps. We collected paired samples from patients with ulcerative colitis (UC) who had previously undergone colectomy and ileal pouch anal anastomosis (IPAA), and profiled the microbial communities of the samples by sequencing V4-V6 or V4-V5 16S rRNA-encoding gene amplicons. Comparisons of 177 taxa in 16 brush-biopsy sample pairs had a mean R(2) of 0.94. We found no taxa that varied significantly between the brush and biopsy samples after adjusting for multiple comparisons (false discovery rate ≤0.05). We also tested the reproducibility of DNA amplification and sequencing in 25 replicate pairs and found negligible variation (mean R(2) = 0.99). A qPCR analysis of the two methods showed that the relative yields of bacterial DNA to human DNA were several-fold higher in the brush samples than in the biopsies. CONCLUSIONS: Mucosal brushing is preferred to mucosal biopsy for sampling the epithelial-associated microbiota. Although both techniques provide similar assessments of the microbial community composition, the brush sampling method has relatively more bacterial to host DNA, covers a larger surface area, and is less traumatic to the epithelium than the mucosal biopsy

    On a degenerate non-local parabolic problem describing infinite dimensional replicator dynamics

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    We establish the existence of locally positive weak solutions to the homogeneous Dirichlet problem for ut=uΔu+u∫Ω∣∇u∣2 u_t = u \Delta u + u \int_\Omega |\nabla u|^2 in bounded domains \Om\sub\R^n which arises in game theory. We prove that solutions converge to 00 if the initial mass is small, whereas they undergo blow-up in finite time if the initial mass is large. In particular, it is shown that in this case the blow-up set coincides with Ω‾\overline{\Omega}, i.e. the finite-time blow-up is global

    Extended search for supernovalike neutrinos in NOvA coincident with LIGO/Virgo detections

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    A search is performed for supernovalike neutrino interactions coincident with 76 gravitational wave events detected by the LIGO/Virgo Collaboration. For 40 of these events, full readout of the time around the gravitational wave is available from the NOvA Far Detector. For these events, we set limits on the fluence of the sum of all neutrino flavors of F29(50) kpc at 90% C.L. Weaker limits are set for other gravitational wave events with partial Far Detector data and/or Near Detector data

    Search for active-sterile neutrino mixing using neutral-current interactions in NOvA

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    We report results from the first search for sterile neutrinos mixing with active neutrinos through a reduction in the rate of neutral-current interactions over a baseline of 810 km between the NOvA detectors. Analyzing a 14-kton detector equivalent exposure of 6.05 x 10(20) protons-on-target in the NuMI beam at Fermilab, we observe 95 neutral-current candidates at the Far Detector compared with 83.5 +/- 9.7(stat) +/- 9.4(syst) events predicted assuming mixing only occurs between active neutrino species. No evidence for upsilon(mu) -\u3e upsilon(mu) transitions is found. Interpreting these results within a 3 + 1 model, we place constraints on the mixing angles theta(24) \u3c 20.8 degrees and theta(34) \u3c 31.2 degrees at the 90% C.L. for 0.05 eV(2) \u3c= Delta m(41)(2) \u3c= 0.5 eV(2), the range of mass splittings that produce no significant oscillations over the Near Detector baseline

    Measurement of the Neutrino Mixing Angle theta(23) in NOvA

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    This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of 6.05 x 10(20) protons on target from the NuMI beam at the Fermi National Accelerator Laboratory. The measurement probes the muon-tau symmetry hypothesis that requires maximal theta(23) mixing (theta(23) = pi/4). Assuming the normal mass hierarchy, we find Delta m(32)(2) = (2.67 +/- 0.11) x 10(-3) eV(2) and sin(2) theta(23)at the two statistically degenerate values 0.404(-0.022)(+0.030) and 0.624(-0.030)(+0.022), both at the 68% confidence level. Our data disfavor the maximal mixing scenario with 2.6 sigma significance

    Constraints on Oscillation Parameters from nu(e) Appearance and nu(mu) Disappearance in NOvA

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    Results are reported from an improved measurement of nu(mu) -\u3e nu(e) transitions by the NOvA experiment. Using an exposure equivalent to 6.05 x 10(20) protons on target, 33 nu(e) candidates are observed with a background of 8.2 +/- 0.8 (syst.). Combined with the latest NOvA nu(mu) disappearance data and external constraints from reactor experiments on sin(2) 2 theta(13), the hypothesis of inverted mass hierarchy with theta(23) in the lower octant is disfavored at greater than 93% C.L. for all values of delta(CP)

    Evaluación de los niveles de Inmunoglobulinas en niños con diagnóstico de leucemia aguda en la etapa final del tratamiento.

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    El presente es un trabajo retrospectivo realizado a partir del año Agosto de 2007 hasta Agosto de 2010. La técnica empleada para determinar la concentración de Igs fue la inmunodifusión radial simple (IDRS). La cuantificación de las concentraciones de IgA, IgG e IgM se realizó en pacientes con más de quince meses desde el diagnóstico, por lo que se encontraban en la etapa final del tratamiento (Mantenimiento) y en aquellos que ya habían culminado el mismo.

    Análisis preliminar de los efectos causados por la exposición al herbicida glifosato roundup en testículo de neonatos de caiman yacare

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    El presente estudio aporta datos preliminares acerca de las alteraciones testiculares en neonatos de Caiman yacare expuestos al herbicida glifosato (Roundup®) durante el desarrollo embrionario. Para tal estudio se colectaron nidos de huevos de yacaré, se trasladaron al laboratorio y luego se dividieron los huevos en tres grupos para comenzar con el ensayo de toxicidad: un primer grupo como control con agua corriente, un segundo grupo experimental tratado con 250 μg/huevo de dicho herbicida y un tercer grupo experimental tratado con 1000 μg/huevo del herbicida. Los huevos se incubaron a 33ºC de temperatura hasta la eclosión y luego se procesaron los testículos para realizar el análisis histológico. Los neonatos del grupo control presentaron túbulos seminíferos bien definidos, con espermatogonias y células de Sertoli, rodeados por la membrana basal. El tejido intersticial consistió en células de Leydig y abundantes capilares sanguíneos. Por otro lado, los neonatos de los grupos expuestos a 250 y 1000 μg/egg del herbicida presentaron alteraciones a nivel de los túbulos seminíferos, como ser desorganización del epitelio germinal y la membrana basal pobremente definida. Si bien estos resultados son preliminares demuestran que existen alteraciones a nivel gonadal posiblemente causadas por la exposición al herbicidaFil: Delssin, Andrea R.. Universidad Nacional del Nordeste. Facultad de Ciencias AgrariasFil: Arrieta, M. Belén. Universidad Nacional del Nordeste. Facultad de Ciencias AgrariasFil: Alvarez, B. Beatriz. Universidad Nacional del Nordeste. Facultad de Ciencias AgrariasFil: Siroski, Pablo A.. Universidad Nacional del NordesteFil: Lombardo, Daniel M.. Universidad Nacional del Nordest
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