5,320 research outputs found

    Experience with the Open Source based implementation for ATLAS Conditions Data Management System

    Get PDF
    Conditions Data in high energy physics experiments is frequently seen as every data needed for reconstruction besides the event data itself. This includes all sorts of slowly evolving data like detector alignment, calibration and robustness, and data from detector control system. Also, every Conditions Data Object is associated with a time interval of validity and a version. Besides that, quite often is useful to tag collections of Conditions Data Objects altogether. These issues have already been investigated and a data model has been proposed and used for different implementations based in commercial DBMSs, both at CERN and for the BaBar experiment. The special case of the ATLAS complex trigger that requires online access to calibration and alignment data poses new challenges that have to be met using a flexible and customizable solution more in the line of Open Source components. Motivated by the ATLAS challenges we have developed an alternative implementation, based in an Open Source RDBMS. Several issues were investigated land will be described in this paper: -The best way to map the conditions data model into the relational database concept considering what are foreseen as the most frequent queries. -The clustering model best suited to address the scalability problem. -Extensive tests were performed and will be described. The very promising results from these tests are attracting the attention from the HEP community and driving further developments.Comment: 8 pages, 4 figures, 3 tables, conferenc

    Hamiltonian embedding of the massive noncommutative U(1) theory

    Full text link
    We show that the massive noncommutative U(1) can be embedded in a gauge theory by using the BFFT Hamiltonian formalism. By virtue of the peculiar non-Abelian algebraic structure of the noncommutative massive U(1) theory, several specific identities involving Moyal commutators had to be used in order to make the embedding possible. This leads to an infinite number of steps in the iterative process of obtaining first-class constraints. We also shown that the involutive Hamiltonian can be constructed.Comment: 8 pages, Revtex (multicol

    Coleta, avaliação e caracterização de plantas medicinais de ocorrência na Amazônia.

    Get PDF
    bitstream/item/39904/1/Com-Tec-23-Am-Oriental.pd

    Extracellular matrix mimics using hyaluronan-based biomaterials

    Get PDF
    Hyaluronan (HA) is a critical element of the extracellular matrix (ECM). The regulated synthesis and degradation of HA modulates the ECM chemical and physical properties that, in turn, influence cellular behavior. HA triggers signaling pathways associated with the adhesion, proliferation, migration, and differentiation of cells, mediated by its interaction with specific cellular receptors or by tuning the mechanical properties of the ECM. This review summarizes the recent advances on strategies used to mimic the HA present in the ECM to study healthy or pathological cellular behavior. This includes the development of HA-based 2D and 3D in vitro tissue models for the seeding and encapsulation of cells, respectively, and HA particles as carriers for the targeted delivery of therapeutic agents.The authors acknowledge thefinancial support from the European Commission’s H2020 programme, under grantagreements H2020-WIDESPREAD-2014-668983-FORECAST, and H2020-MSCA-RISE-2019-872648-MEPHOS. S.A.acknowledges the Portuguese Foundation for Science and Technology (FCT) for her PhD grant (SFRH/BD/112075/2015)

    Diversidade genética entre genótipos de bananeira detectada por marcadores SSR.

    Get PDF
    A bananicultura é uma atividade de elevada importância econômica e social, responde pela produção de alimento básico para as populações carentes de diversos países. O uso de técnicas que apresentem elevada reprodutibilidade e que sejam estáveis, como os microssatélites, são importantes, pois auxiliam na caracterização de espécies economicamente importantes como bananeiras e na criação de perfis moleculares de variedades (1)

    Manihot alterniflora and M. elongata spp. nov. (Euphorbiaceae) and the rediscovery of M. quinquefolia in Caatinga (semiarid) vegetation in Brazil.

    Get PDF
    We describe and illustrate two species of Manihot that occur in Caatinga (semiarid) vegetation in Brazil and redescribe and lectotypify M. quinquefolia Pohl, which was only known from a single collection made by J. E. B. Pohl in 1827. Manihot elongata P.Carvalho & M.Martins is widely distributed and Manihot alterniflora P.Carvalho & M.Martins is endangered because of its small populations and restricted area of occurrence. We establish M. quinquefolia as the only species of Manihot in the Caatinga with compound leaves. An identification key is provided for the 13 species of Manihot present in the Caatinga

    Diversidade genética em genótipos de bananeira por meio de variáveis morfoagronômicas e moleculares.

    Get PDF
    A cultura da banana possui grande importância econômica e social, presente na mesa de todas as camadas sociais da população. O Brasil é o sexto maior produtor do mundo com uma produção de 6.978.310 toneladas em uma área cultivada de 486.991ha (FAO, 2012). A caracterização é uma atividade primordial na geração de conhecimentos de germoplasma por identificar, descrever e diferenciar os genótipos de qualquer espécie, auxiliando, no manejo do germoplasma e no fornecimento de informações ao melhoramento genético (VICENTE et al., 2005)

    Comparison between cluster methods using simultaneous analysis of qualitative and quantitative data in bananas.

    Get PDF
    Understanding the genetic variability in germplasm banks is essential to genetic breeding programs. Usually quantification of the variability is carried out using quantitative and qualitative data separately, which may not be enough to infer about the similarity between the genotypes evaluated

    Identifying mobility patterns of socioeconomic classes in a transportation context case study : São Carlos -SP (Brazil)

    Get PDF
    This article presents the results of a study in São Carlos (Brazil), whose goal was the characterization of mobility patterns associated with socioeconomic classes. This study helps to understand the relations between mobility patterns and socioeconomic classes and aims to demonstrate the modal choice distribution in an urban region by analyzing the socioeconomic characteristics of households. Information from an OD Survey, made in 2007, was used as database. After a geospatial location process, elaborated with a help of Geographic Information System (GIS), the database was analyzed qualitatively, in order to obtain the mobility patterns of each socioeconomic class, considering gender, age, modal choice and distance traveled. Results showed that (i) differences between modal choices in each daily trip depend on the user class; (ii) divergences between distance traveled and modal choice considering gender and age was observed in the daily trip

    Middle eastern genetic legacy in the paternal and maternal gene pools of Chuetas

    Get PDF
    Chuetas are a group of descendants of Majorcan Crypto-Jews (Balearic Islands, Spain) who were socially stigmatized and segregated by their Majorcan neighbours until recently; generating a community that, although after the seventeenth century no longer contained Judaic religious elements, maintained strong group cohesion, Jewishness consciousness, and endogamy. Collective memory fixed 15 surnames as a most important defining element of Chueta families. Previous studies demonstrated Chuetas were a differentiated population, with a considerable proportion of their original genetic make-up. Genetic data of Y-chromosome polymorphism and mtDNA control region showed, in Chuetas’ paternal lineages, high prevalence of haplogroups J2-M172 (33%) and J1-M267 (18%). In maternal lineages, the Chuetas hallmark is the presence of a new sub-branching of the rare haplogroup R0a2m as their modal haplogroup (21%). Genetic diversity in both Y-chromosome and mtDNA indicates the Chueta community has managed to avoid the expected heterogeneity decrease in their gene pool after centuries of isolation and inbreeding. Moreover, the composition of their uniparentally transmitted lineages demonstrates a remarkable signature of Middle Eastern ancestry—despite some degree of host admixture—confirming Chuetas have retained over the centuries a considerable degree of ancestral genetic signature along with the cultural memory of their Jewish origin.This work was partially supported by grant AAEE246/2014 from the Direcció General de R + D + I (Comu-nitat Autònoma de les Illes Balears) and European Regional Development Fund (ERDF) and FCT, Portuguese Foundation for Science and Tecnology PTDC/ATP-DEM/4545/2012 project financed by European Social Funds (COMPETE-FEDER). We are grateful to Maria Trinidad Garcia (from the Serveis Cientificotècnics of the Uni-versitat de les Illes Balears) for her assistance and help with capillary electrophoresis procedures, María Luz Gómez-Barbeito for her help in mtDNA sequencing and Meryl Wyn Jones for the English language corrections. We would also like to sincerely thank all the people who volunteered to participate in this study
    corecore