SwePub
Sök i SwePub databas

  form:Ext_t

Träfflista för sökning "WFRF:(Marshall Andrea) "

form:Search_simp_t: WFRF:(Marshall Andrea)

  • navigation:Result_t 1-10 navigation:of_t 47
hitlist:Modify_result_t
   
hitlist:Enumeration_thitlist:Reference_thitlist:Reference_picture_thitlist:Find_Mark_t
1.
  • Abelev, Betty, et al. (creator_code:aut_t)
  • Long-range angular correlations on the near and away side in p-Pb collisions at root S-NN=5.02 TeV
  • 2013
  • record:In_t: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 719:1-3, s. 29-41
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • Angular correlations between charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV for transverse momentum ranges within 0.5 < P-T,P-assoc < P-T,P-trig < 4 GeV/c. The correlations are measured over two units of pseudorapidity and full azimuthal angle in different intervals of event multiplicity, and expressed as associated yield per trigger particle. Two long-range ridge-like structures, one on the near side and one on the away side, are observed when the per-trigger yield obtained in low-multiplicity events is subtracted from the one in high-multiplicity events. The excess on the near-side is qualitatively similar to that recently reported by the CMS Collaboration, while the excess on the away-side is reported for the first time. The two-ridge structure projected onto azimuthal angle is quantified with the second and third Fourier coefficients as well as by near-side and away-side yields and widths. The yields on the near side and on the away side are equal within the uncertainties for all studied event multiplicity and p(T) bins, and the widths show no significant evolution with event multiplicity or p(T). These findings suggest that the near-side ridge is accompanied by an essentially identical away-side ridge. (c) 2013 CERN. Published by Elsevier B.V. All rights reserved.
  •  
2.
  • Abelev, Betty, et al. (creator_code:aut_t)
  • Underlying Event measurements in pp collisions at root s=0.9 and 7 TeV with the ALICE experiment at the LHC
  • 2012
  • record:In_t: Journal of High Energy Physics. - 1029-8479. ; :7
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • We present measurements of Underlying Event observables in pp collisions at root s = 0 : 9 and 7 TeV. The analysis is performed as a function of the highest charged-particle transverse momentum p(T),L-T in the event. Different regions are defined with respect to the azimuthal direction of the leading (highest transverse momentum) track: Toward, Transverse and Away. The Toward and Away regions collect the fragmentation products of the hardest partonic interaction. The Transverse region is expected to be most sensitive to the Underlying Event activity. The study is performed with charged particles above three different p(T) thresholds: 0.15, 0.5 and 1.0 GeV/c. In the Transverse region we observe an increase in the multiplicity of a factor 2-3 between the lower and higher collision energies, depending on the track p(T) threshold considered. Data are compared to PYTHIA 6.4, PYTHIA 8.1 and PHOJET. On average, all models considered underestimate the multiplicity and summed p(T) in the Transverse region by about 10-30%.
  •  
3.
  • Abelev, Betty, et al. (creator_code:aut_t)
  • Measurement of prompt J/psi and beauty hadron production cross sections at mid-rapidity in pp collisions at root s=7 TeV
  • 2012
  • record:In_t: Journal of High Energy Physics. - 1029-8479. ; :11
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • The ALICE experiment at the LHC has studied J/psi production at mid-rapidity in pp collisions at root s = 7 TeV through its electron pair decay on a data sample corresponding to an integrated luminosity L-int = 5.6 nb(-1). The fraction of J/psi from the decay of long-lived beauty hadrons was determined for J/psi candidates with transverse momentum p(t) > 1,3 GeV/c and rapidity vertical bar y vertical bar < 0.9. The cross section for prompt J/psi mesons, i.e. directly produced J/psi and prompt decays of heavier charmonium states such as the psi(2S) and chi(c) resonances, is sigma(prompt J/psi) (p(t) > 1.3 GeV/c, vertical bar y vertical bar < 0.9) = 8.3 +/- 0.8(stat.) +/- 1.1 (syst.)(-1.4)(+1.5) (syst. pol.) mu b. The cross section for the production of b-hadrons decaying to J/psi with p(t) > 1.3 GeV/c and vertical bar y vertical bar < 0.9 is a sigma(J/psi <- hB) (p(t) > 1.3 GeV/c, vertical bar y vertical bar < 0.9) = 1.46 +/- 0.38 (stat.)(-0.32)(+0.26) (syst.) mu b. The results are compared to QCD model predictions. The shape of the p(t) and y distributions of b-quarks predicted by perturbative QCD model calculations are used to extrapolate the measured cross section to derive the b (b) over bar pair total cross section and d sigma/dy at mid-rapidity.
  •  
4.
  • van Hylckama Vlieg, Marte A.M., et al. (creator_code:aut_t)
  • The risk of recurrent venous thromboembolism after discontinuation of anticoagulant therapy in patients with cancer-associated thrombosis: a systematic review and meta-analysis
  • 2023
  • record:In_t: eClinicalMedicine. - 2589-5370. ; 64
  • swepub:Mat_researchreview_t (swepub:level_refereed_t)abstract
    • Background: The optimal duration of anticoagulation in patients with active cancer and venous thromboembolism (VTE) is unknown. Current clinical guidelines advocate anticoagulant therapy for 3–6 months and to continue anticoagulant therapy for as long as the cancer is active. However, an adequate systematic review on the rate of recurrent VTE after discontinuation of anticoagulant therapy has not been performed. Methods: For this systemic review and meta-analysis, we searched Embase.com, Medline (Ovid), Web of Science, Cochrane Library, and Google Scholar, from database inception to February 16, 2023, for studies on anticoagulant therapy in patients with cancer and the recurrence of venous thromboembolism after discontinuation of this therapy. We included randomised controlled trials and cohort studies published in English that reported on patients who met the following: cancer and a first VTE, completed at least 3 months of anticoagulant therapy, were followed after discontinuation of anticoagulant therapy, and with symptomatic recurrent VTE as an outcome during follow-up. Study-level data were requested from study authors. The primary outcome was the rate of recurrent VTE after discontinuation of anticoagulant therapy. A Bayesian random-effects meta-analysis was used to estimate the rate of recurrent VTE per 100 person-years for the pooled studies at different time intervals after discontinuation of anticoagulation therapy. We also calculated the cumulative VTE recurrence rate at different time intervals. Forest plots were mapped and the results were summarized by the median and 95% credible interval (CIs). This study was registered with PROSPERO, CRD42021249060. Findings: Of 3856 studies identified in our search, 33 studies were identified for inclusion. After requesting study-level data, 14 studies involving 1922 patients with cancer-associated thrombosis were included. The pooled rate of recurrent VTE per 100 person-years after discontinuation of anticoagulant therapy was 14.6 events (95% credible interval 6.5–22.8) in the first three months, decreasing to 1.1 events (95% CI 0.3–2.1) in year 2–3, and 2.2 events (95% CI 0.0–4.4) in year 3–5 after discontinuation of anticoagulant therapy. The cumulative VTE recurrence rate was 28.3% (95% CI 15.6–39.6%) at 1 year; 31.1% (95% CI 16.5–43.8%) at 2 years; 31.9% (95% CI 16.8–45.0%) at 3 years; and 35.0% (95% CI 16.8–47.4%) at 5 years after discontinuation of anticoagulant therapy. Interpretation: This meta-analysis demonstrates a high rate of recurrent VTE over time after discontinuation of anticoagulant therapy in patients with cancer-associated thrombosis. Our results support the current clinical guidelines to continue anticoagulant therapy in patients with active cancer. Funding: Erasmus MC.
  •  
5.
  • Östlund, Britt, 1956-, et al. (creator_code:aut_t)
  • Using Academic Work Places to Involve Older People in the Design of Digital Applications. : Presentation of a Methodological Framework to Advance Co-design in Later Life
  • 2020
  • swepub:Mat_conferencepaper_t (swepub:level_refereed_t)abstract
    • Methods to involve users in design have long been used to create relevant content and increase the accuracy of product development. Demographic trends have raised the issue of the needs and demands of older people, especially with regard to digitization. In contrast to the high number of publications discussing the importance of involving people in the design of their daily life, very few publications suggest how to do it. While participatory design is used with older people, there is no common understanding about which methods are used for what purposes. This paper presents a framework methodology that further advances the opportunity to involve older people in the design process and increase understanding of old people’s subjective experience of getting their lives digitized and how to involve them in design. Given that digitalization, with its systemic complexity, requires an understanding of how technology is contextualized, the need to understand what it means to age in today’s digital society is part of successful design. One objective is to go beyond stereotypes that often characterize generalizations of older people. We are using the concept of co-design, which is well established but not specifically adapted to older users. The goal is a matrix of tested co-design methods to be used by citizens, researchers, businesses or anyone who is interested in increasing the impact of old people on the design of new technologies.
  •  
6.
  • Aharonian, Felix, et al. (creator_code:aut_t)
  • Atmospheric gas dynamics in the Perseus cluster observed with Hitomi
  • 2018
  • record:In_t: Publications of the Astronomical Society of Japan. - : Oxford University Press (OUP). - 0004-6264 .- 2053-051X. ; 70:2
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • Extending the earlier measurements reported in Hitomi collaboration (2016, Nature, 535, 117), we examine the atmospheric gas motions within the central 100 kpc of the Perseus cluster using observations obtained with the Hitomi satellite. After correcting for the point spread function of the telescope and using optically thin emission lines, we find that the line-of-sight velocity dispersion of the hot gas is remarkably low and mostly uniform. The velocity dispersion reaches a maxima of approximately 200 km s(-1) toward the central active galactic nucleus (AGN) and toward the AGN inflated northwestern ghost bubble. Elsewhere within the observed region, the velocity dispersion appears constant around 100 km s(-1). We also detect a velocity gradient with a 100 km s(-1) amplitude across the cluster core, consistent with large-scale sloshing of the core gas. If the observed gas motions are isotropic, the kinetic pressure support is less than 10% of the thermal pressure support in the cluster core. The well-resolved, optically thin emission lines have Gaussian shapes, indicating that the turbulent driving scale is likely below 100 kpc, which is consistent with the size of the AGN jet inflated bubbles. We also report the first measurement of the ion temperature in the intracluster medium, which we find to be consistent with the electron temperature. In addition, we present a new measurement of the redshift of the brightest cluster galaxy NGC 1275.
  •  
7.
  • Aharonian, Felix, et al. (creator_code:aut_t)
  • Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi
  • 2018
  • record:In_t: Publications of the Astronomical Society of Japan. - : Oxford University Press (OUP). - 0004-6264 .- 2053-051X. ; 70:2
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • The Hitomi Soft X-ray Spectrometer spectrum of the Perseus cluster, with similar to 5 eV resolution in the 2-9 keV band, offers an unprecedented benchmark of the atomic modeling and database for hot collisional plasmas. It reveals both successes and challenges of the current atomic data and models. The latest versions of AtomDB/APEC (3.0.8), SPEX (3.03.00), and CHIANTI (8.0) all provide reasonable fits to the broad-band spectrum, and are in close agreement on best-fit temperature, emission measure, and abundances of a few elements such as Ni. For the Fe abundance, the APEC and SPEX measurements differ by 16%, which is 17 times higher than the statistical uncertainty. This is mostly attributed to the differences in adopted collisional excitation and dielectronic recombination rates of the strongest emission lines. We further investigate and compare the sensitivity of the derived physical parameters to the astrophysical source modeling and instrumental effects. The Hitomi results show that accurate atomic data and models are as important as the astrophysical modeling and instrumental calibration aspects. Substantial updates of atomic databases and targeted laboratory measurements are needed to get the current data and models ready for the data from the next Hitomi-level mission.
  •  
8.
  • Aharonian, Felix, et al. (creator_code:aut_t)
  • Detection of polarized gamma-ray emission from the Crab nebula with the Hitomi Soft Gamma-ray Detector
  • 2018
  • record:In_t: Publications of the Astronomical Society of Japan. - : Oxford University Press (OUP). - 0004-6264 .- 2053-051X. ; 70:6
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • We present the results from the Hitomi Soft Gamma-ray Detector (SGD) observation of the Crab nebula. The main part of SGD is a Compton camera, which in addition to being a spectrometer, is capable of measuring polarization of gamma-ray photons. The Crab nebula is one of the brightest X-ray / gamma-ray sources on the sky, and, the only source from which polarized X-ray photons have been detected. SGD observed the Crab nebula during the initial test observation phase of Hitomi. We performed the data analysis of the SGD observation, the SGD background estimation and the SGD Monte Carlo simulations, and, successfully detected polarized gamma-ray emission from the Crab nebula with only about 5 ks exposure time. The obtained polarization fraction of the phase-integrated Crab emission (sum of pulsar and nebula emissions) is (22.1% +/- 10.6%), and, the polarization angle is 110.degrees 7 + 13.degrees 2 /-13.degrees 0 in the energy range of 60-160 keV (The errors correspond to the 1 sigma deviation). The confidence level of the polarization detection was 99.3%. The polarization angle measured by SGD is about one sigma deviation with the projected spin axis of the pulsar, 124.degrees 0 +/- 0.degrees 1.
  •  
9.
  • Aharonian, Felix, et al. (creator_code:aut_t)
  • Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi
  • 2018
  • record:In_t: Publications of the Astronomical Society of Japan. - : Oxford University Press (OUP). - 0004-6264 .- 2053-051X. ; 70:2
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • We report on a Hitomi observation of IGR J16318-4848, a high-mass X-ray binary system with an extremely strong absorption of N-H similar to 10(24) cm(-2). Previous X-ray studies revealed that its spectrum is dominated by strong fluorescence lines of Fe as well as continuum emission lines. For physical and geometrical insight into the nature of the reprocessing material, we utilized the high spectroscopic resolving power of the X-ray microcalorimeter (the soft X-ray spectrometer: SXS) and the wide-band sensitivity by the soft and hard X-ray imagers (SXI and HXI) aboard Hitomi. Even though the photon counts are limited due to unintended off-axis pointing, the SXS spectrum resolves Fe K alpha(1) and K alpha(2) lines and puts strong constraints on the line centroid and line width. The line width corresponds to a velocity of 160(-70)(+300) km s(-1). This represents the most accurate, and smallest, width measurement of this line made so far from the any X-ray binary, much less than the Doppler broadening and Doppler shift expected from speeds that are characteristic of similar systems. Combined with the K-shell edge energy measured by the SXI and HXI spectra, the ionization state of Fe is estimated to be in the range of Fe I-IV. Considering the estimated ionization parameter and the distance between the X-ray source and the absorber, the density and thickness of the materials are estimated. The extraordinarily strong absorption and the absence of a Compton shoulder component have been confirmed. These characteristics suggest reprocessing materials that are distributed in a narrow solid angle or scattering, primarily by warm free electrons or neutral hydrogen. This measurement was achieved using the SXS detection of 19 photons. It provides strong motivation for follow-up observations of this and other X-ray binaries using the X-ray Astrophysics Recovery Mission and other comparable future instruments.
  •  
10.
  • Aharonian, Felix, et al. (creator_code:aut_t)
  • Hitomi observation of radio galaxy NGC 1275 : The first X-ray microcalorimeter spectroscopy of Fe-K alpha line emission from an active galactic nucleus
  • 2018
  • record:In_t: Publications of the Astronomical Society of Japan. - : Oxford University Press (OUP). - 0004-6264 .- 2053-051X. ; 70:2
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • The origin of the narrow Fe-K alpha fluorescence line at 6.4 keV from active galactic nuclei has long been under debate; some of the possible sites are the outer accretion disk, the broad line region, a molecular torus, or interstellar/intracluster media. In 2016 February-March, we performed the first X-ray microcalorimeter spectroscopy with the Soft X-ray Spectrometer (SXS) on board the Hitomi satellite of the Fanaroff-Riley type I radio galaxy NGC 1275 at the center of the Perseus cluster of galaxies. With the high-energy resolution of similar to 5 eV at 6 keV achieved by Hitomi/SXS, we detected the Fe-K alpha line with similar to 5.4 sigma significance. The velocity width is constrained to be 500-1600 km s(-1) (FWHM for Gaussian models) at 90% confidence. The SXS also constrains the continuum level from the NGC 1275 nucleus up to similar to 20 keV, giving an equivalent width of similar to 20 eV for the 6.4 keV line. Because the velocity width is narrower than that of the broad H alpha line of similar to 2750 km s(-1), we can exclude a large contribution to the line flux from the accretion disk and the broad line region. Furthermore, we performed pixel map analyses on the Hitomi/SXS data and image analyses on the Chandra archival data, and revealed that the Fe-K alpha line comes from a region within similar to 1.6 kpc of the NGC 1275 core, where an active galactic nucleus emission dominates, rather than that from intracluster media. Therefore, we suggest that the source of the Fe-K alpha line from NGC 1275 is likely a low-covering-fraction molecular torus or a rotating molecular disk which probably extends from a parsec to hundreds of parsecs scale in the active galactic nucleus system.
  •  
Skapa referenser, mejla, bekava och länka
  • navigation:Result_t 1-10 navigation:of_t 47
swepub:Mat_t
swepub:mat_article_t (39)
swepub:mat_researchreview_t (5)
swepub:mat_chapter_t (1)
swepub:mat_publicationother_t (1)
swepub:mat_conferencepaper_t (1)
swepub:Level_t
swepub:level_refereed_t (45)
swepub:level_scientificother_t (2)
swepub:Hitlist_author_t
Maeda, Yoshitomo (12)
Allen, Steven W. (12)
Axelsson, Magnus (12)
Stawarz, Lukasz (12)
Hughes, John P. (12)
Aharonian, Felix (12)
deldatabas:search_more_t
Akamatsu, Hiroki (12)
Akimoto, Fumie (12)
Angelini, Lorella (12)
Audard, Marc (12)
Awaki, Hisamitsu (12)
Bamba, Aya (12)
Bautz, Marshall W. (12)
Blandford, Roger (12)
Brenneman, Laura W. (12)
Bulbul, Esra (12)
Cackett, Edward M. (12)
Chernyakova, Maria (12)
Chiao, Meng P. (12)
Coppi, Paolo S. (12)
Costantini, Elisa (12)
de Plaa, Jelle (12)
de Vries, Cor P. (12)
den Herder, Jan-Will ... (12)
Done, Chris (12)
Dotani, Tadayasu (12)
Ebisawa, Ken (12)
Eckart, Megan E. (12)
Enoto, Teruaki (12)
Ezoe, Yuichiro (12)
Fabian, Andrew C. (12)
Ferrigno, Carlo (12)
Foster, Adam R. (12)
Fujimoto, Ryuichi (12)
Fukazawa, Yasushi (12)
Furuzawa, Akihiro (12)
Galeazzi, Massimilia ... (12)
Gallo, Luigi C. (12)
Gandhi, Poshak (12)
Giustini, Margherita (12)
Goldwurm, Andrea (12)
Gu, Liyi (12)
Guainazzi, Matteo (12)
Haba, Yoshito (12)
Hagino, Kouichi (12)
Harrus, Ilana M. (12)
Hatsukade, Isamu (12)
Hayashi, Katsuhiro (12)
Hayashi, Takayuki (12)
Hayashida, Kiyoshi (12)
deldatabas:search_less_t
swepub:Hitlist_uni_t
swepub_uni:su_t (15)
swepub_uni:lu_t (13)
swepub_uni:umu_t (6)
swepub_uni:uu_t (5)
swepub_uni:gu_t (4)
swepub_uni:lnu_t (4)
deldatabas:search_more_t
swepub_uni:kth_t (3)
swepub_uni:ltu_t (3)
swepub_uni:liu_t (2)
swepub_uni:ki_t (2)
swepub_uni:oru_t (1)
swepub_uni:cth_t (1)
swepub_uni:slu_t (1)
deldatabas:search_less_t
hitlist:Language_t
language:Eng_t (47)
hitlist:HSV_t
hsv:Cat_1_t (26)
hsv:Cat_3_t (15)
hsv:Cat_5_t (2)
hsv:Cat_6_t (1)

hitlist:Year_t

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt tools:Close_t

tools:Permalink_label_t