10 research outputs found
CT differentiation of enlarged mediastinal lymph node due to anthracosis from metastatic lymphadenopathy: a comparative study proven by endobronchial US-guided transbronchial needle aspiration
PURPOSEAnthracosis often results in mediastinal nodal enlargement. The aim of this comparative study was to evaluate if it is possible to differentiate endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) proven anthracotic lymph nodes from malignant lymph node enlargement by means of multislice computed tomography (MSCT).METHODSWe compared the MSCT findings of 89 enlarged lymph nodes due to anthracosis with 54 malignant lymph nodes (non-small cell lung cancer 75.9%, small cell lung cancer 18.5%, and non-Hodgkin lymphoma 5.6%). The lymph nodes were assessed for density (calcification, fat, and necrosis), shape (oval, round), contrast enhancement, and contour (sharp, ill-defined).RESULTSMalignant lymph nodes showed significantly greater axis diameters (P < 0.001). Both anthracotic and malignant nodes were most often oval (86.5% of all malignant nodes vs. 81.5% of all anthracotic nodes, P = 0.420) and showed confluence in a remarkable percentage (28.1% vs. 42.6%, P = 0.075). Anthracotic nodes showed calcifications more often (18% vs. 0%, P < 0.001). Malignant lymph nodes showed a significantly greater short and long axis diameter (P < 0.001), and they had a higher frequency of ill-defined contours (27.8% vs. 2.2%, P < 0.001) and contrast enhancement (27.8% vs. 5.6%, P < 0.001). Nodal necrosis, which appeared in one third of the malignant nodes, was not observed in anthracosis (35.2% vs. 0%, P < 0.001). Confluence of enlarged lymph nodes was seen in malignant lymph nodes (42.6%), as well as in lymph node enlargement due to anthracosis (28.1%, P = 0.075).CONCLUSIONOur results show that there are significant differences in MSCT findings of malignant enlarged lymph nodes and benign lymph node enlargement due to anthracosis
Obesity in Patients with Craniopharyngioma: Assessment of Food Intake and Movement Counts Indicating Physical Activity
The aberrant fusion proteins PML-RARα and PLZF-RARα contribute to the overexpression of cyclin A1 in acute promyelocytic leukemia
Investigating the Dearomative Rearrangement of Biaryl Phosphine-Ligated Pd(II) Complexes
A series of monoligated L·Pd<sup>II</sup>(Ar)X complexes
(L
= dialkyl biaryl phosphine) have been prepared and studied in an effort
to better understand an unusual dearomative rearrangement previously
documented in these systems. Experimental and theoretical evidence
suggest a concerted process involving the unprecedented Pd<sup>II</sup>-mediated insertion of an aryl group into an unactivated arene
Fundamental Noise Limits and Sensitivity of Piezoelectrically Driven Magnetoelastic Cantilevers
International audienceMagnetoelastic sensors for the detection of low-frequency and low-amplitude magnetic fields are in the focus of research for more than 30 years. In order to minimize the limit of detection (LOD) of such sensor systems, it is of high importance to understand and to be able to quantify the relevant noise sources. In this contribution, cantilever-type electromechanical and magnetoelastic resonators, respectively, are comprehensively investigated and mathematically described not only with regard to their phase sensitivity but especially to the extent of the sensor-intrinsic phase noise. Both measurements and calculations reveal that the fundamental LOD is limited by additive phase noise due to thermal-mechanical noise of the resonator, i.e. by thermally induced random vibrations of the cantilever, and by thermal-electrical noise of the piezoelectric material. However, due to losses in the magnetic material parametric flicker phase noise arises, limiting the overall performance. In particular, it is shown that the LOD is virtually independent of the magnetic sensitivity but is solely determined by the magnetic losses. Instead of the sensitivity, the magnetic losses, represented by the material's effective complex permeability, should be considered as the most important parameter for the further improvement of such sensors in the future. This implication is not only valid for magnetoelastic cantilevers but also applies to any type of magnetoelastic resonator
Prevalence and Prognostic Impact of Allelic Imbalances Associated with Leukemic Transformation of Philadelphia Chromosome-Negative Myeloproliferative Neoplasms.
Observation of decays and precision measurements of the masses
International audienceThe first observation of the decays B(s)0→J/ψpp¯ is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb-1, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo suppression. The measured branching fractions are B(B0→J/ψpp¯)=[4.51±0.40(stat)±0.44(syst)]×10-7, B(Bs0→J/ψpp¯)=[3.58±0.19(stat)±0.39(syst)]×10-6. For the Bs0 meson, the result is much higher than the expected value of O(10-9). The small available phase space in these decays also allows for the most precise single measurement of both the B0 mass as 5279.74±0.30(stat)±0.10(syst) MeV and the Bs0 mass as 5366.85±0.19(stat)±0.13(syst) MeV
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Two-particle Bose-Einstein correlations and their Lévy parameters in PbPb collisions at = 5.02 TeV
Two-particle Bose-Einstein momentum correlation functions are studied for charged-hadron pairs in lead-lead collisions at a center-of-mass energy per nucleon pair of = 5.02 TeV. The data sample, containing 4.27 minimum bias events corresponding to an integrated luminosity of 0.607 nb, was collected by the CMS experiment in 2018. The experimental results are discussed in terms of a L\'evy-type source distribution. The parameters of this distribution are extracted as functions of particle pair average transverse mass and collision centrality. These parameters include the L\'evy index or shape parameter (), the L\'evy scale parameter (), and the correlation strength parameter (). The source shape, characterized by , is found to be neither Cauchy nor Gaussian, implying the need for a full L\'evy analysis. Similarly to what was previously found for systems characterized by Gaussian source radii, a hydrodynamical scaling is observed for the L\'evy parameter. The parameter is studied in terms of the core-halo model.Comment: Submitted to Physical Review C. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-21-011 (CMS Public Pages
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Search for supersymmetry in hadronic final states with missing transverse energy using the variables αT and b-quark multiplicity in pp collisions at √s = 8 TeV
Submitted by Vitor Silverio Rodrigues ([email protected]) on 2014-05-27T11:30:34Z
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Previous issue date: 2013-09-01
An inclusive search for supersymmetric processes that produce final states with jets and missing transverse energy is performed in pp collisions at a centre-of-mass energy of 8 TeV. The data sample corresponds to an integrated luminosity of 11.7 fb-1 collected by the CMS experiment at the LHC. In this search, a dimensionless kinematic variable, αT, is used to discriminate between events with genuine and misreconstructed missing transverse energy. The search is based on an examination of the number of reconstructed jets per event, the scalar sum of transverse energies of these jets, and the number of these jets identified as originating from bottom quarks. No significant excess of events over the standard model expectation is found. Exclusion limits are set in the parameter space of simplified models, with a special emphasis on both compressed-spectrum scenarios and direct or gluino-induced production of third-generation squarks. For the case of gluino-mediated squark production, gluino masses up to 950-1125 GeV are excluded depending on the assumed model. For the direct pair-production of squarks, masses up to 450 GeV are excluded for a single light first- or second-generation squark, increasing to 600 GeV for bottom squarks. © 2013 CERN for the benefit of the CMS collaboration.
CERN, Geneva
Yerevan Physics Institute, Yerevan
Institut für Hochenergiephysik der OeAW, Wien
National Centre for Particle and High Energy Physics, Minsk
Universiteit Antwerpen, Antwerpen
Vrije Universiteit Brussel, Brussel
Université Libre de Bruxelles, Bruxelles
Ghent University, Ghent
Université Catholique de Louvain, Louvain-la-Neuve
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Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro
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Universidade Estadual Paulista, São Paulo
Universidade Federal do ABC, São Paulo
Institute for Nuclear Research and Nuclear Energy, Sofia
University of Sofia, Sofia
Institute of High Energy Physics, Beijing
State Key Laboratory of Nuclear Physics and Technology Peking University, Beijing
Universidad de Los Andes, Bogota
Technical University of Split, Split
University of Split, Split
Institute Rudjer Boskovic, Zagreb
University of Cyprus, Nicosia
Charles University, Prague
Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics, Cairo
National Institute of Chemical Physics and Biophysics, Tallinn
Department of Physics University of Helsinki, Helsinki
Helsinki Institute of Physics, Helsinki
Lappeenranta University of Technology, Lappeenranta
DSM/IRFU CEA/Saclay, Gif-sur-Yvette
Laboratoire Leprince-Ringuet, Ecole Polytechnique IN2P3-CNRS, Palaiseau
Institut Pluridisciplinaire Hubert Curien, Universite de Strasbourg, Universite de Haute Alsace Mulh CNRS/IN2P3, Strasbourg
CNRS-IN2P3, Institut de Physique Nucléaire de Lyon Université de Lyon, Université Claude Bernard Lyon 1, Villeurbanne
Institute of High Energy Physics and Informatization Tbilisi State University, Tbilisi
I. Physikalisches Institut RWTH Aachen University, Aachen
III. Physikalisches Institut A RWTH Aachen University, Aachen
III. Physikalisches Institut B RWTH Aachen University, Aachen
Deutsches Elektronen-Synchrotron, Hamburg
University of Hamburg, Hamburg
Institut für Experimentelle Kernphysik, Karlsruhe
Institute of Nuclear and Particle Physics (INPP) NCSR Demokritos, Aghia Paraskevi
University of Athens, Athens
University of Ioánnina, Ioánnina
KFKI Research Institute for Particle and Nuclear Physics, Budapest
Institute of Nuclear Research ATOMKI, Debrecen
University of Debrecen, Debrecen
Panjab University, Chandigarh
University of Delhi, Delhi
Saha Institute of Nuclear Physics, Kolkata
Bhabha Atomic Research Centre, Mumbai
Tata Institute of Fundamental Research - EHEP, Mumbai
Tata Institute of Fundamental Research - HECR, Mumbai
Institute for Research in Fundamental Sciences (IPM), Tehran
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Politecnico di Bari, Bari
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Università di Catania, Catania
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Università di Napoli 'Federico II', Napoli
Università della Basilicata (Potenza), Napoli
Università G. Marconi (Roma), Napoli
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Università di Perugia, Perugia
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Università di Torino, Torino
Università del Piemonte Orientale (Novara), Torino
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Università di Trieste, Trieste
Kangwon National University, Chunchon
Kyungpook National University, Daegu
Institute for Universe and Elementary Particles Chonnam National University, Kwangju
Korea University, Seoul
University of Seoul, Seoul
Sungkyunkwan University, Suwon
Vilnius University, Vilnius
Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City
Universidad Iberoamericana, Mexico City
Benemerita Universidad Autonoma de Puebla, Puebla
Universidad Autónoma de San Luis Potosí, San Luis Potosí
University of Auckland, Auckland
University of Canterbury, Christchurch
National Centre for Physics Quaid-I-Azam University, Islamabad
National Centre for Nuclear Research, Swierk
Institute of Experimental Physics, Faculty of Physics University of Warsaw, Warsaw
Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa
Joint Institute for Nuclear Research, Dubna
Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg)
Institute for Nuclear Research, Moscow
Institute for Theoretical and Experimental Physics, Moscow
P.N. Lebedev Physical Institute, Moscow
Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University, Moscow
State Research Center of Russian Federation Institute for High Energy Physics, Protvino
Faculty of Physics and Vinca Institute of Nuclear Sciences University of Belgrade, Belgrade
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid
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Universidad de Oviedo, Oviedo
Instituto de Física de Cantabria (IFCA) CSIC-Universidad de Cantabria, Santander
European Organization for Nuclear Research CERN, Geneva
Paul Scherrer Institut, Villigen
Institute for Particle Physics ETH Zurich, Zurich
Universität Zürich, Zurich
National Central University, Chung-Li
National Taiwan University (NTU), Taipei
Chulalongkorn University, Bangkok
Cukurova University, Adana
Physics Department Middle East Technical University, Ankara
Bogazici University, Istanbul
Istanbul Technical University, Istanbul
National Scientific Center Kharkov Institute of Physics and Technology, Kharkov
University of Bristol, Bristol
Rutherford Appleton Laboratory, Didcot
Imperial College, London
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