7.1 Incentivos para publicaciones indizadas

Publicación

Vertex reconstruction of neutrino interactions using deep learning

(Institute of Electrical and Electronics Engineers Inc., 2017)

Terwilliger A.M.

;

Perdue G.N.

;

Isele D.

;

Patton R.M.

;

Young S.R.

Deep learning offers new tools to improve our understanding of many important scientific problems. Neutrinos are the most abundant particles in existence and are hypothesized to explain the matter-antimatter asymmetry that dominates our universe. Definitive tests of this conjecture require a detailed understanding of neutrino interactions with a variety of nuclei. Many measurements of interest depend on vertex reconstruction – finding the origin of a neutrino interaction using data from the detector, which can be represented as images. Traditionally, this has been accomplished by utilizing methods that identify the tracks coming from the interaction. However, these methods are not ideal for interactions where an abundance of tracks and cascades occlude the vertex region. Manual algorithm engineering to handle these challenges is complicated and error prone. Deep learning extracts rich, semantic features directly from raw data, making it a promising solution to this problem. In this work, deep learning models are presented that classify the vertex location in regions meaningful to the domain scientists improving their ability to explore more complex interactions.

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Publicación

A new species of poison-dart frog (Anura: Dendrobatidae) from Manu Province, Amazon region of southeastern Peru, with notes on its natural history, bioacoustics, phylogenetics, and recommended conservation status

(Magnolia Press, 2017)

Serrano-Rojas S.J.

;

Whitworth A.

;

Villacampa J.

;

Von May R.

;

Gutiérrez R.C.

;

Padial J.M.

;

Chaparro J.C.

We describe and name a new species of poison-dart frog from the Amazonian slopes of the Andes in Manu Province, Madre de Dios Department, Peru; specifically within the Amarakaeri Communal Reserve and the buffer zone of Manu National Park. Ameerega shihuemoy sp. nov. is supported by a unique combination of characters: black dorsum with cream to light orange dorsolateral lines, blue belly reticulated with black, and the lack of axillary, thigh and calf flash marks. Within Ameerega, it shares the general appearance of A. altamazonica, A. boliviana, A. hahneli, A. ignipedis, A. petersi, A. picta, A. pongoensis, A. pulchripecta, A. simulans, A. smaragdina, and A. yungicola; each possessing a granular black to brown dorsum, a light labial bar, a conspicuous dorsolateral line running from the snout to the groin, and a metallic blue belly and underside of arms and hind limbs. From most of these species it can be distinguished by lacking flash marks on the axillae, thighs, and calves (absent in only A. boliviana and A. smaragdina, most A. petersi, and some A. pongoensis), by having bright cream to orange dorsolateral stripes (white, intense yellow, or green in all other species, with the exception of A. picta), and by its blue belly reticulated with black (bluish white and black in A. boliviana, green and blue with black marbling in A. petersi, and green and blue lacking black marbling in A. smaragdina). Its mating call also shows clear differences to morphologically similar species, with a lower note repetition rate, longer space between calls, and higher fundamental and dominant frequencies. Phylogenetic analyses based on the 16S mitochondrial rRNA fragment also support the distinctiveness of the new species and suggest that A. shihuemoy is most closely related to Ameerega macero, A. altamazonica, A. rubriventris, and two undescribed species (Ameerega sp. from Porto Walter, Acre, Brazil, and Ameerega sp. from Ivochote, Cusco, Peru). Genetically, the new species is most similar to the sympatric A. macero, from which it clearly differs in characteristics of its advertisement call and coloration. The new species is found near rocky streams during the dry season and near temporary water bodies during the rainy season. Tadpoles are found in lentic water along streams, or in shallow, slow-moving streams. Given its small geographic range, we recommend that A. shihuemoy should be considered 'Near threatened' (NT) according to IUCN Red List criteria. Copyright © 2017 Magnolia Press.

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Publicación

Measurement of partonic nuclear effects in deep-inelastic neutrino scattering using MINERvA

(American Physical Society, 2016)

Mousseau, J

;

Wospakrik, M

;

Aliaga, L

;

Altinok, O

;

Bellantoni, L

;

Bercellie, A

;

Betancourt, M

;

Bodek, A

;

Bravar, A

;

Budd, H

;

Cai, T

;

Carneiro, MF

;

Christy, ME

;

Chvojka, J

;

da Motta, H

;

Devan, J

;

Dytman, SA

;

Diaz, GA

;

Eberly, B

;

Felix, J

;

Fields, L

;

Fine, R

;

Gago, AM

;

Galindo, R

;

Gallagher, H

;

Ghosh, A

;

Golan, T

;

Gran, R

;

Harris, DA

;

Higuera, A

;

Hurtado, K

;

Kiveni, M

;

Kleykamp, J

;

Kordosky, M

;

Le, T

;

Maher, E

;

Manly, S

;

Mann, WA

;

Marshall, CM

;

Caicedo, DAM

;

McFarland, KS

;

McGivern, CL

;

McGowan, AM

;

Messerly, B

;

Miller, J

;

Mislivec, A

;

Morfin, JG

;

Naples, D

;

Nelson, JK

;

Norrick, A

;

Nuruzzaman

;

Osta, J

;

Paolone, V

;

Park, J

;

Patrick, CE

;

Perdue, GN

;

Rakotondravohitra, L

;

Ramirez, MA

;

Ransome, RD

;

Ray, H

;

Ren, L

;

Rimal, D

;

Rodrigues, PA

;

Ruterbories, D

;

Schellman, H

;

Schmitz, DW

;

Salinas, CJS

;

Tagg, N

;

Tice, BG

;

Valencia, E

;

Walton, T

;

Wolcott, J

;

Zavala, G

;

Zhang, D

The MINERvA Collaboration reports a novel study of neutrino-nucleus charged-current deep inelastic scattering (DIS) using the same neutrino beam incident on targets of polystyrene, graphite, iron, and lead. Results are presented as ratios of C, Fe, and Pb to CH. The ratios of total DIS cross sections as a function of neutrino energy and flux-integrated differential cross sections as a function of the Bjorken scaling variable x are presented in the neutrino-energy range of 5-50 GeV. Based on the predictions of charged-lepton scattering ratios, good agreement is found between the data and prediction at medium x and low neutrino energy. However, the ratios appear to be below predictions in the vicinity of the nuclear shadowing region, x<0.1. This apparent deficit, reflected in the DIS cross-section ratio at high Eν, is consistent with previous MINERvA observations [B. Tice (MINERvA Collaboration), Phys. Rev. Lett. 112, 231801 (2014).] and with the predicted onset of nuclear shadowing with the axial-vector current in neutrino scattering. © 2016 American Physical Society.

5

Publicación

Adsorption of arsenite and arsenate on binary and ternary magnetic nanocomposites with high iron oxide content

(Elsevier, 2018)

Ramos Guivar J.A.

;

Bustamante D. A.

;

Gonzalez J.C.

;

Sanches E.A.

;

Morales M.A.

;

Raez J.M.

;

López-Muñoz M.-J.

;

Arencibia A.

Bare maghemite nanoparticles (Nps), binary, and ternary magnetic nanocomposites made with titanium dioxide (TiO2) and graphene oxide (GO) were synthesized by a facile and cheap coprecipitation chemical route, and used as magnetic nanoadsorbents to remove arsenite (As(III)) and arsenate (As(V)) from water. The structural, morphological, magnetic and surface properties were analyzed by XRD, TEM microscopy, FTIR and Raman vibrational spectroscopy, Mössbauer technique and N2 adsorption-desorption measurements. It was found that materials were composed of maghemite nanoparticles with crystallites diameters varying from 9 to 13 nm for bare Nps, binary and ternary nanocomposites, with these nanocomposites having a high percentage of maghemite phase (80%). The presence of TiO2 and GO in the binary and ternary materials was also confirmed. All the samples were found to show magnetic properties and a slight porosity, with a specific surface area that increases up to 82 m2 /g when the metal oxides Nps were supported on GO. The aqueous arsenic adsorption performance was studied from kinetic and equilibrium point of view, and the pH adsorption capacity dependence was evaluated aiming to explain the adsorption mechanism. The three nanocomposites prepared in this work exhibit high adsorption capacity for arsenic species, with values of maximum adsorption capacity ranging from 83.1 to 110.4 mg/g for As(III) and from 90.2 to 127.2 mg/g for As(V) from bare to ternary nanocomposites, and can be fast separated with a permanent magnet of neodymium (Nd) in less than 10 min. Therefore, these nanosystems can be proposed as good adsorbents for both arsenic species from water.

7

Publicación

Measurement of Final-State Correlations in Neutrino Muon-Proton Mesonless Production on Hydrocarbon at Eν ©=3 GeV

(American Physical Society, 2018)

Lu X.-G.

;

Betancourt M.

;

Walton T.

;

Akbar F.

;

Aliaga L.

;

Altinok O.

;

Andrade D.A.

;

Ascencio M.

;

Bellantoni L.

;

Bercellie A.

;

Bodek A.

;

Bravar A.

;

Budd H.

;

Cai T.

;

Carneiro M.F.

;

Chaves J.

;

Coplowe D.

;

Da Motta H.

;

Dytman S.A.

;

Díaz G.A.

;

Felix J.

;

Fields L.

;

Fine R.

;

Gago A.M.

;

Galindo R.

;

Gallagher H.

;

Ghosh A.

;

Gran R.

;

Harris D.A.

;

Henry S.

;

Jena S.

;

Jena D.

;

Kleykamp J.

;

Kordosky M.

;

Le T.

;

Maher E.

;

Manly S.

;

Mann W.A.

;

Marshall C.M.

;

McFarland K.S.

;

McGowan A.M.

;

Messerly B.

;

Miller J.

;

Mislivec A.

;

Morfín J.G.

;

Mousseau J.

;

Naples D.

;

Nelson J.K.

;

Nguyen C.

;

Norrick A.

;

Nuruzzaman

;

Olivier A.

;

Paolone V.

;

Patrick C.E.

;

Perdue G.N.

;

Ramírez M.A.

;

Ransome R.D.

;

Ren L.

;

Rimal D.

;

Rodrigues P.A.

;

Ruterbories D.

;

Schellman H.

;

Sobczyk J.T.

;

Salinas C.J.S.

;

Su H.

;

Sultana M.

;

Valencia E.

;

Wark D.

;

Weber A.

;

Wolcott J.

;

Wospakrik M.

;

Yaeggy B.

;

(MINERvA Collaboration)

Final-state kinematic imbalances are measured in mesonless production of νμ þ A → μ− þ p þ X in the MINERvA tracker. Initial- and final-state nuclear effects are probed using the direction of the μ−-p transverse momentum imbalance and the initial-state momentum of the struck neutron. Differential cross sections are compared to predictions based on current approaches to medium modeling. These models underpredict the cross section at intermediate intranuclear momentum transfers that generally exceed the Fermi momenta. As neutrino interaction models need to correctly incorporate the effect of the nucleus in order to predict neutrino energy resolution in oscillation experiments, this result points to a region of phase space where additional cross section strength is needed in current models, and demonstrates a new technique that would be suitable for use in fine-grained liquid argon detectors where the effect of the nucleus may be even larger.

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7.1 Incentivos para publicaciones indizadas

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