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| 2. |
- Aad, G., et al.
(författare)
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- 2012
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Ingår i: Physical Review Letters. - 1079-7114 .- 0031-9007. ; 109:21
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Tidskriftsartikel (refereegranskat)
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| 3. |
- Adam, J., et al.
(författare)
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Centrality dependence of charged jet production in p–Pb collisions at √sNN = 5.02 TeV
- 2016
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Ingår i: European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; 76:5
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Tidskriftsartikel (refereegranskat)abstract
- Measurements of charged jet production as a function of centrality are presented for p–Pb collisions recorded at √sNN = 5.02 TeV with the ALICE detector. Centrality classes are determined via the energy deposit in neutron calorimeters at zero degree, close to the beam direction, to minimise dynamical biases of the selection. The corresponding number of participants or binary nucleon–nucleon collisions is determined based on the particle production in the Pb-going rapidity region. Jets have been reconstructed in the central rapidity region from charged particles with the anti-kT algorithm for resolution parameters R= 0.2 and R= 0.4 in the transverse momentum range 20 to 120 GeV/c. The reconstructed jet momentum and yields have been corrected for detector effects and underlying-event background. In the five centrality bins considered, the charged jet production in p–Pb collisions is consistent with the production expected from binary scaling from pp collisions. The ratio of jet yields reconstructed with the two different resolution parameters is also independent of the centrality selection, demonstrating the absence of major modifications of the radial jet structure in the reported centrality classes. © 2016, CERN for the benefit of the ALICE collaboration.
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| 4. |
- Adam, J., et al.
(författare)
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Centrality dependence of high-p(T) D meson suppression in Pb-Pb collisions at root s(NN)=2.76 TeV
- 2015
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Ingår i: Journal of High Energy Physics. - 1029-8479. ; :11
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Tidskriftsartikel (refereegranskat)abstract
- The nuclear modification factor, R-AA, of the prompt charmed mesons D-0, D+ and D*+, and their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at a centre-of-mass energy root s(NN) = 2 : 76 TeV in two transverse momentum intervals, 5 < p(T) < 8 GeV/c and 8 < p(T) < 16 GeV/c, and in six collision centrality classes. The R-AA shows a maximum suppression of a factor of 5{6 in the 10% most central collisions. The suppression and its centrality dependence are compatible within uncertainties with those of charged pions. A comparison with the R-AA of non-prompt J/psi from B meson decays, measured by the CMS Collaboration, hints at a larger suppression of D mesons in the most central collisions.
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| 5. |
- Adam, J., et al.
(författare)
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Multiplicity dependence of charged pion, kaon, and (anti)proton production at large transverse momentum in p–Pb collisions at sNN=5.02 TeV
- 2016
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Ingår i: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 760, s. 720-735
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Tidskriftsartikel (refereegranskat)abstract
- The production of charged pions, kaons and (anti)protons has been measured at mid-rapidity (−0.510 GeV/c), the particle ratios are consistent with those reported for pp and Pb–Pb collisions at the LHC energies. At intermediate pT the (anti)proton RpPb shows a Cronin-like enhancement, while pions and kaons show little or no nuclear modification. At high pT the charged pion, kaon and (anti)proton RpPb are consistent with unity within statistical and systematic uncertainties. © 2016 The Author
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| 6. |
- Krantz, Tobias, 1971-
(författare)
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Lagskydda lokalt självstyre
- 2000
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Ingår i: Upsala nya tidning. - 1104-0173.
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 7. |
- Overland, Conny, 1975, et al.
(författare)
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The Sheep Watching the Shepherd: Employee Representation on the Board and Earnings Quality
- 2022
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Ingår i: European Accounting Review. - : Informa UK Limited. - 0963-8180 .- 1468-4497. ; 31:5, s. 1299-1336
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Tidskriftsartikel (refereegranskat)abstract
- We investigate to what degree employee representatives contribute to the board’s monitoring of earnings quality. We argue that employee representatives have incentives to prevent earnings manipulations motivated by negotiation considerations. Furthermore, they seek risk reducing policies, have a long-term interest in their firm and possess firm-specific knowledge, which in turn can result in improved earnings quality. Employee representation also increases the diversity on the board, which can enhance the board of directors’ internal communication and monitoring. Using a sample of firms listed on the Stockholm Stock Exchange (2006–2014), we find lower abnormal accruals as well as less excessive R&D cuts in firms with employee representation, controlling for alternative model specifications and potential sample selection bias. Moreover, we find less income-decreasing abnormal accruals in firms with employee representatives during the 2010-2011 collective bargaining period. This study also reveals that earnings quality varies with the characteristics of employee representatives. Our findings contribute to the literature on boards’ monitoring and financial reporting quality, as it examines a less noticed aspect of board diversity, i.e. employee representation.
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| 8. |
- Adam, J., et al.
(författare)
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Higher harmonic flow coefficients of identified hadrons in Pb-Pb collisions at √sNN=2.76 TeV
- 2016
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Ingår i: Journal of High Energy Physics. - 1029-8479. ; 2016:9
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Tidskriftsartikel (refereegranskat)abstract
- The elliptic, triangular, quadrangular and pentagonal anisotropic flow coefficients for π±, K± and p + p ¯ in Pb-Pb collisions at sNN=2.76 TeV were measured with the ALICE detector at the Large Hadron Collider. The results were obtained with the Scalar Product method, correlating the identified hadrons with reference particles from a different pseudorapidity region. Effects not related to the common event symmetry planes (non-flow) were estimated using correlations in pp collisions and were subtracted from the measurement. The obtained flow coefficients exhibit a clear mass ordering for transverse momentum (pT) values below ≈ 3 GeV/c. In the intermediate pT region (3 < pT< 6 GeV/c), particles group at an approximate level according to the number of constituent quarks, suggesting that coalescence might be the relevant particle production mechanism in this region. The results for pT< 3 GeV/c are described fairly well by a hydrodynamical model (iEBE-VISHNU) that uses initial conditions generated by A Multi-Phase Transport model (AMPT) and describes the expansion of the fireball using a value of 0.08 for the ratio of shear viscosity to entropy density (η/s), coupled to a hadronic cascade model (UrQMD). Finally, expectations from AMPT alone fail to quantitatively describe the measurements for all harmonics throughout the measured transverse momentum region. However, the comparison to the AMPT model highlights the importance of the late hadronic rescattering stage to the development of the observed mass ordering at low values of pT and of coalescence as a particle production mechanism for the particle type grouping at intermediate values of pT for all harmonics.[Figure not available: see fulltext.] © 2016, The Author(s).
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| 9. |
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| 10. |
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An Enterprise Architecture Based Method for Quantified Analysis of IT System Impact on Maintenance Management
- 2009
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Proceedings (redaktörskap) (refereegranskat)abstract
- This paper presents a method for quantified analysis of the impact ICT systems have on maintenance management. The method is based on Enterprise Architecture (EA) which is a model based tool enabling holistic management of an enterprise?s ICT system portfolio and its relation and support to the business. A domain where the relation between ICT systems and business processes is crucial for cost efficient operation is maintenance of asset intensive geographically distributed processes, such as distribution of electric power. Power utilities invest many monetary resources in maintenance, a large proportion of these investments being related to development and integration of ICT systems. Thus, there is a need for the power utilities to understand how the products of these investments influence the performance of the maintenance process. The degree of efficiency of these investments runs a risk of being low unless there is a clear understanding of how specific ICT system solutions affects the maintenance activities. The suggested method combines EA with the Maintenance Scorecard and introduces Extended Influence Diagrams (EIDs) to enable a quantitative analysis of how cause and effect between ICT systems and the performance of maintenance processes are related to each other. The method provides management support for rationale decisions concerning ICT systemsￜ support of the domain of maintenance management. The paper is concluded with an example of how the method can be applied to a typical maintenance process within an electric power utility
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