Ensembl Genomes 2013: scaling up access to genome-wide data

Ensembl Genomes (http://www.ensemblgenomes.org) is an integrating resource for genome-scale data from non-vertebrate species. The project exploits and extends technologies for genome annotation, analysis and dissemination, developed in the context of the vertebrate-focused Ensembl project, and provides a complementary set of resources for non-vertebrate species through a consistent set of programmatic and interactive interfaces. These provide access to data including reference sequence, gene models, transcriptional data, polymorphisms and comparative analysis. This article provides an update to the previous publications about the resource, with a focus on recent developments. These include the addition of important new genomes (and related data sets) including crop plants, vectors of human disease and eukaryotic pathogens. In addition, the resource has scaled up its representation of bacterial genomes, and now includes the genomes of over 9000 bacteria. Specific extensions to the web and programmatic interfaces have been developed to support users in navigating these large data sets. Looking forward, analytic tools to allow targeted selection of data for visualization and download are likely to become increasingly important in future as the number of available genomes increases within all domains of life, and some of the challenges faced in representing bacterial data are likely to become commonplace for eukaryotes in future

Ensembl Genomes 2018: an integrated omics infrastructure for non-vertebrate species

Ensembl Genomes (http://www.ensemblgenomes.org) is an integrating resource for genome-scale data from non-vertebrate species, complementing the resources for vertebrate genomics developed in the Ensembl project (http://www.ensembl.org). Together, the two resources provide a consistent set of programmatic and interactive interfaces to a rich range of data including genome sequence, gene models, transcript sequence, genetic variation, and comparative analysis. This paper provides an update to the previous publications about the resource, with a focus on recent developments and expansions. These include the incorporation of almost 20 000 additional genome sequences and over 35 000 tracks of RNA-Seq data, which have been aligned to genomic sequence and made available for visualization. Other advances since 2015 include the release of the database in Resource Description Framework (RDF) format, a large increase in community-derived curation, a new high-performance protein sequence search, additional cross-references, improved annotation of non-protein-coding genes, and the launch of pre-release and archival sites. Collectively, these changes are part of a continuing response to the increasing quantity of publicly-available genome-scale data, and the consequent need to archive, integrate, annotate and disseminate these using automated, scalable methods

Sivers asymmetry extracted in SIDIS at the hard scales of the Drell-Yan process at COMPASS

Eight proton transverse-spin-dependent azimuthal asymmetries are extracted in four regions of the photon virtuality Q(2) from the COMPASS 2010 semi-inclusive hadron measurements in deep inelastic muon nucleon scattering. These Q(2) regions correspond to the four regions of the di-muon mass root Q(2) used in the ongoing analyses of the COMPASS Drell-Yan measurements, which allows for a future direct comparison of the nucleon transverse-momentum-dependent parton distribution functions extracted from these two alternative measurements. In addition, for the azimuthal asymmetries induced by the Sivers transverse-momentum-dependent parton distribution function various two-dimensional kinematic dependences are presented. The integrated Sivers asymmetries are found to be positive with an accutacy that appears to be sufficient to test the sign change of the Sivers function predicted by Quantum Chromodynamics

Berufliche Belastungen der Krankenpflege eine empirische Untersuchung

IAB-92-853-54 AW 904 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

COMPASS COmmon Muon and Proton Apparatus for Structure and Spectroscopy

%NA58 %title\\ \\COMPASS is a new fixed target experiment at the SPS to study hadron spectroscopy with hadron beams (up to 300~GeV/c) and hadron structure with polarized muon beams (100-200~GeV/c).\\ \\The main physics objective of the muon beam program is the measurement of $\Delta$G, the gluon polarization in a longitudinally polarized nucleon. More generally, it is planned to measure the flavour separated spin structure functions of the nucleons in polarized muon - polarized nucleon deep inelastic scattering, both with longitudinal and transverse target polarization modes. For these measurements a new 1.3~m long polarized target and a superconducting solenoid with 200~mrad acceptance will be used.\\ \\The hadronic program comprises a search for glueballs in the high mass region (above 2~GeV/c$^{2}$) in exclusive diffractive pp scattering, a study of leptonic and semileptonic decays of charmed hadrons with high statistics and precision, and Primakoff scattering with various probes. A detailed investigation of charmed and doubly charmed baryons will be performed in a second stage of the experiment. For these measurements a highly segmented silicon target detector and high resolution electromagnetic calorimeters will be constructed.\\ \\The setup consists of two independent spectrometers, one for small angle and one for large angle particles, giving a large angular acceptance for all measurements. Each spectrometer comprises full particle identification using RICH detectors, electromagnetic and hadronic calorimetry and muon detection. Owing to precision tracking with silicon detectors, gaseous strip detectors and drift tubes high momentum resolution is obtained.\\ \\The measurements will be performed with high intensity beams (2 10$^{8}$ muons/spill and 10$^{8}$ hadrons/spill) allowing to collect the needed statistics. The fully pipelined readout scheme can cope with the foreseen trigger rates (about 100~Khz) without noticeable deadtime.\\ \\Data taking will start in the year 2000 with the muon programme.\\ \

Corrigendum to "Odd and even partial waves of ηπ−ηπ^− and η′π−η′π^− in π−p→η(′)π−pπ^−p → η^{(′)}π^−p at 191 GeV/c"

Adolph C, Akhunzyanov R, Alexeev MG, et al. Corrigendum to "Odd and even partial waves of $ηπ^−$ and $η′π^−$ in $π^−p → η^{(′)}π^−p$ at 191 GeV/c". Physics Letters B. 2020;811: 135913

Study of Σ(1385) and Ξ(1321) hyperon and antihyperon production in deep inelastic muon scattering

Adolph C, Alekseev M, Alexakhin VY, et al. Study of Σ(1385) and Ξ(1321) hyperon and antihyperon production in deep inelastic muon scattering. European Physical Journal C. 2013;73(10): 2581.Large samples of \Lambda, \Sigma(1385) and \Xi(1321) hyperons produced indeep-inelastic muon scattering off a ^6LiD target were collected with theCOMPASS experimental setup at CERN. The relative yields of \Sigma(1385)^+,\Sigma(1385)^-, \bar{\Sigma}(1385)^-, \bar{\Sigma}(1385)^+, \Xi(1321)^-, and\bar{\Xi}(1321)^+ hyperons decaying into \Lambda(\bar{\Lambda})\pi weremeasured. The heavy hyperon to \Lambda and heavy antihyperon to \bar{\Lambda}yield ratios were found to be in the range 3.8% to 5.6% with a relativeuncertainty of about 10%. They were used to tune the parameters relevant forstrange particle production of the LEPTO Monte Carlo generator

NSC63284

Multiplicities of charged hadrons produced in deep inelastic muon scattering off a $^6$LiD target have been measured as a function of the DIS variables $x_{Bj}$, $Q^2$, $W^2$ and the final state hadron variables $p_T$ and $z$. The $p_T^2$ distributions are fitted with a single exponential function at low values of $p_T^2$ to determine the dependence of $\langle p_T^2 \rangle$ on $x_{Bj}$, $Q^2$, $W^2$ and $z$. The $z$-dependence of $\langle p_T^2 \rangle$ is shown to be a potential tool to extract the average intrinsic transverse momentum squared of partons, $\langle k_{\perp}^2 \rangle$, as a function of $x_{Bj}$ and $Q^2$ in a leading order QCD parton model

Collins and Sivers asymmetries in muonproduction of pions and kaons off transversely polarised protons

AbstractMeasurements of the Collins and Sivers asymmetries for charged pions and charged and neutral kaons produced in semi-inclusive deep-inelastic scattering of high energy muons off transversely polarised protons are presented. The results were obtained using all the available COMPASS proton data, which were taken in the years 2007 and 2010. The Collins asymmetries exhibit in the valence region a non-zero signal for pions and there are hints of non-zero signal also for kaons. The Sivers asymmetries are found to be positive for positive pions and kaons and compatible with zero otherwise

The polarised valence quark distribution from semi-inclusive DIS

AbstractThe semi-inclusive difference asymmetry Ah+−h− for hadrons of opposite charge has been measured by the COMPASS experiment at CERN. The data were collected in the years 2002–2004 using a 160 GeV polarised muon beam scattered off a large polarised 6LiD target in the kinematic range 0.006<x<0.7 and 1<Q2<100 (GeV/c)2. In leading order QCD (LO) the deuteron asymmetry Ah+−h− measures the valence quark polarisation and provides an evaluation of the first moment of Δuv+Δdv which is found to be equal to 0.40±0.07(stat.)±0.06(syst.) over the measured range of x at Q2=10 (GeV/c)2. When combined with the first moment of g1d previously measured on the same data, this result favours a non-symmetric polarisation of light quarks Δu¯=−Δd¯ at a confidence level of two standard deviations, in contrast to the often assumed symmetric scenario Δu¯=Δd¯=Δs¯=Δs