An amplitude-phase (Ermakov-Lewis) approach for the Jackiw-Pi model of bilayer graphene

In the context of bilayer graphene we use the simple gauge model of Jackiw and Pi to construct its numerical solutions in powers of the bias potential V according to a general scheme due to Kravchenko. Next, using this numerical solutions, we develop the Ermakov-Lewis approach for the same model. This leads us to numerical calculations of the Lewis-Riesenfeld phases that could be of forthcoming experimental interest for bilayer graphene. We also present a generalization of the Ioffe-Korsch nonlinear Darboux transformationComment: FTC, 11 pp, 5 figure

EURONU WP6 2009 yearly report: Update of the physics potential of Nufact, superbeams and betabeams

Many studies in the last ten years have shown that we can measure the unknown angle theta13, discover leptonic CP violation and determine the neutrino hierarchy in more precise neutrino oscillation experiments, searching for the subleading channel nue -> numu in the atmospheric range. In this first report of WP6 activities the following new results are reviewed: (1) Re-evaluation of the physics reach of the upcoming generation of experiments to measure theta13 and delta; (2) New tools to explore a larger parameter space as needed beyond the standard scenario; (3) Neutrino Factory: (a) evaluation of the physics reach of a Nufact regards sterile neutrinos; (b) evaluation of the physics reach of a Nufact as regards non-standard interactions; (c) evaluation of the physics reach of a Nufact as regards violation of unitarity; (d) critical assessment on long baseline tau-detection at Nufact; (e) new physics searches at a near detector in a Nufact; (4) Beta-beams: (a) choice of ions and location for a gamma = 100 CERN-based beta-beam; (b) re-evaluation of atmospheric neutrino background for the gamma = 100 beta-beam scenario; (c) study of a two baseline beta-beam; (d) measuring absolute neutrino mass with beta-beams; (e) progress on monochromatic beta-beams; (5) Update of the physics potential of the SPL super-beam. Eventually, we present an updated comparison of the sensitivity to theta13, delta and the neutrino mass hierarchy of several of the different proposed facilities.Comment: 2009 Yearly report of the Working Package 6 (Physics) of the EUROnu FP7 EU project. 55 pages, 21 figures

Comparative pan-genome analysis of Piscirickettsia salmonis reveals genomic divergences within genogroups

Indexación: Scopus.Piscirickettsia salmonis is the etiological agent of salmonid rickettsial septicemia, a disease that seriously affects the salmonid industry. Despite efforts to genomically characterize P. salmonis, functional information on the life cycle, pathogenesis mechanisms, diagnosis, treatment, and control of this fish pathogen remain lacking. To address this knowledge gap, the present study conducted an in silico pan-genome analysis of 19 P. salmonis strains from distinct geographic locations and genogroups. Results revealed an expected open pan-genome of 3,463 genes and a core-genome of 1,732 genes. Two marked genogroups were identified, as confirmed by phylogenetic and phylogenomic relationships to the LF-89 and EM-90 reference strains, as well as by assessments of genomic structures. Different structural configurations were found for the six identified copies of the ribosomal operon in the P. salmonis genome, indicating translocation throughout the genetic material. Chromosomal divergences in genomic localization and quantity of genetic cassettes were also found for the Dot/Icm type IVB secretion system. To determine divergences between core-genomes, additional pan-genome descriptions were compiled for the so-termed LF and EM genogroups. Open pan-genomes composed of 2,924 and 2,778 genes and core-genomes composed of 2,170 and 2,228 genes were respectively found for the LF and EM genogroups. The core-genomes were functionally annotated using the Gene Ontology, KEGG, and Virulence Factor databases, revealing the presence of several shared groups of genes related to basic function of intracellular survival and bacterial pathogenesis. Additionally, the specific pan-genomes for the LF and EM genogroups were defined, resulting in the identification of 148 and 273 exclusive proteins, respectively. Notably, specific virulence factors linked to adherence, colonization, invasion factors, and endotoxins were established. The obtained data suggest that these genes could be directly associated with inter-genogroup differences in pathogenesis and host-pathogen interactions, information that could be useful in designing novel strategies for diagnosing and controlling P. salmonis infection. © 2017 Nourdin-Galindo, Sánchez, Molina, Espinoza-Rojas, Oliver, Ruiz, Vargas-Chacoff, Cárcamo, Figueroa, Mancilla, Maracaja-Coutinho and Yañez.https://www.frontiersin.org/articles/10.3389/fcimb.2017.00459/ful

Early optical spectra of nova V1369 Cen show presence of Lithium

We present early high resolution spectroscopic observations of the nova V1369 Cen. We have detected an absorption feature at 6695.6 \AA\, that we have identified as blue--shifted $^7$Li I $\lambda$6708 \AA. The absorption line, moving at -550 km/s, was observed in five high-resolution spectra of the nova obtained at different epochs. On the basis of the intensity of this absorption line we infer that a single nova outburst can inject in the Galaxy $M_{Li} =$ 0.3 - 4.8 $\times 10^{-10}$ M$_{\odot}$. Given the current estimates of Galactic nova rate, this amount is sufficient to explain the puzzling origin of the overabundance of Lithium observed in young star populations.Comment: 6 pages, 5 figures, accepted for publication in ApJLetter

Alar Rim Grafts

Alar rim grafts date back to the 1950s for the correction of alar base in cleft lip nose. Cartilage struts under the anterior half of the alae of a pinched nose tip were popularised and the cartilage of the auricular concha became the donor site of choice for nasal procedures. Recently, some surgeons pointed to its potential role in aesthetic cases and added some technical refinements. These grafts are used for open and closed rhinoplasties. They usually consist of a rod of septal or auricular cartilage that we lay as reinforcement inside a pocket along the alar margin. Indications include the following: congenital or traumatic asymmetry, dynamic alar collapse, alar flare, primary retraction or notching, secondary (surgical or traumatic) retraction and malposition of the lateral cartilages (upwards or downwards). Harvesting and implanting techniques as well as the possible drawbacks are discussed

Seleção de porta-enxertos para maracujazeiro-amarelo nas condições da depressão cuiabana.

O presente trabalho foi realizado na Fazenda Experimental da Fundação Universidade Federal de Mato Grosso, com o objetivo de selecionar porta-enxertos, que apresentava maior vigor vegetativo para o maracujazeiros-amarelos, nas condições da Depressão Cuiabana. O delineamento experimental utilizado foi blocos ao acaso, sendo as épocas de avaliação consideradas como blocos (60, 75, 90, 105 e 120 dias), os tratamentos foram os porta-enxertos (seleção FB200 e a espécie Passiflora nítida), com 3 repetições. As variáveis estudadas foram o diâmetro do colo, diâmetro do tronco cerca de 1 cm acima da região enxertada, altura do colo da planta até o enxerto, altura a partir do enxerto, altura total, número de entrenós até a região enxertada, número de entrenós a partir da região enxertada e número de folhas. Os dados foram tabulados utilizando-se o pacote Statistical Package for the Social Science (SPSS) versão 11.0 e submetidos à analise estatística descritiva. Posteriormente, as variáveis foram submetidas à análise de variância multivariada com dois fatores (Manova two-way). O uso da análise de MANOVA, possibilitou observar que os porta-enxertos, o tempo e as interação entre eles tiveram grande importância na avaliação do desenvolvimento vegetativo do maracujazeiro-amarelo. A melhor resposta quanto ao desenvolvimento vegetativo foi induzido pelo porta-enxerto. O porta-enxerto ?FB200? apresentou resultados mais favoráveis quanto ao vigor de suas mudas