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Sökning: WFRF:(Larsson Roger)

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  • Johansson, Roger, et al. (författare)
  • Det moderna i skolan och skolan i det moderna
  • 2021
  • Ingår i: Den moderna skolans framväxt : 1960-talets förändringar i de gymnasiala skolformerna - 1960-talets förändringar i de gymnasiala skolformerna. - 2002-6323. - 9789178957736 - 9789178957743 ; 15, s. 9-13
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • Om den moderna gymnasieskolans plats i samhällsomvandlingen vid 1960-talets ingång
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  • Johansson, Roger, et al. (författare)
  • Ett märkesår i stadens historia
  • 2013
  • Ingår i: Malmö 1914 – en stad inför språnget till det moderna. - 9789163722868 ; , s. 4-19
  • Bokkapitel (populärvet., debatt m.m.)abstract
    • Historieskrivningen om Malmö 1914-2014
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  • Pisani, Luigi, et al. (författare)
  • Geoeconomic variations in epidemiology, ventilation management, and outcomes in invasively ventilated intensive care unit patients without acute respiratory distress syndrome : a pooled analysis of four observational studies
  • 2022
  • Ingår i: The Lancet Global Health. - 2214-109X. ; 10:2, s. 227-235
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Geoeconomic variations in epidemiology, the practice of ventilation, and outcome in invasively ventilated intensive care unit (ICU) patients without acute respiratory distress syndrome (ARDS) remain unexplored. In this analysis we aim to address these gaps using individual patient data of four large observational studies. Methods: In this pooled analysis we harmonised individual patient data from the ERICC, LUNG SAFE, PRoVENT, and PRoVENT-iMiC prospective observational studies, which were conducted from June, 2011, to December, 2018, in 534 ICUs in 54 countries. We used the 2016 World Bank classification to define two geoeconomic regions: middle-income countries (MICs) and high-income countries (HICs). ARDS was defined according to the Berlin criteria. Descriptive statistics were used to compare patients in MICs versus HICs. The primary outcome was the use of low tidal volume ventilation (LTVV) for the first 3 days of mechanical ventilation. Secondary outcomes were key ventilation parameters (tidal volume size, positive end-expiratory pressure, fraction of inspired oxygen, peak pressure, plateau pressure, driving pressure, and respiratory rate), patient characteristics, the risk for and actual development of acute respiratory distress syndrome after the first day of ventilation, duration of ventilation, ICU length of stay, and ICU mortality. Findings: Of the 7608 patients included in the original studies, this analysis included 3852 patients without ARDS, of whom 2345 were from MICs and 1507 were from HICs. Patients in MICs were younger, shorter and with a slightly lower body-mass index, more often had diabetes and active cancer, but less often chronic obstructive pulmonary disease and heart failure than patients from HICs. Sequential organ failure assessment scores were similar in MICs and HICs. Use of LTVV in MICs and HICs was comparable (42·4% vs 44·2%; absolute difference –1·69 [–9·58 to 6·11] p=0·67; data available in 3174 [82%] of 3852 patients). The median applied positive end expiratory pressure was lower in MICs than in HICs (5 [IQR 5–8] vs 6 [5–8] cm H2O; p=0·0011). ICU mortality was higher in MICs than in HICs (30·5% vs 19·9%; p=0·0004; adjusted effect 16·41% [95% CI 9·52–23·52]; p<0·0001) and was inversely associated with gross domestic product (adjusted odds ratio for a US$10 000 increase per capita 0·80 [95% CI 0·75–0·86]; p<0·0001). Interpretation: Despite similar disease severity and ventilation management, ICU mortality in patients without ARDS is higher in MICs than in HICs, with a strong association with country-level economic status. Funding: No funding.
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  • Aiempanakit, Montri, et al. (författare)
  • Effect of peak power in reactive high power impulse magnetron sputtering of titanium dioxide
  • 2011
  • Ingår i: Surface & Coatings Technology. - : Elsevier BV. - 0257-8972 .- 1879-3347. ; 205:20, s. 4828-4831
  • Tidskriftsartikel (refereegranskat)abstract
    • The effect of peak power in a high power impulse magnetron sputtering (HiPIMS) reactive deposition of TiO(2) films has been studied with respect to the deposition rate and coating properties. With increasing peak power not only the ionization of the sputtered material increases but also their energy. In order to correlate the variation in the ion energy distributions with the film properties, the phase composition, density and optical properties of the films grown with different HiPIMS-parameters have been investigated and compared to a film grown using direct current magnetron sputtering (DCMS). All experiments were performed for constant average power and pulse on time (100W and 35 mu s, respectively), different peak powers were achieved by varying the frequency of pulsing. Ion energy distributions for Ti and O and its dependence on the process conditions have been studied. It was found that films with the highest density and highest refractive index were grown under moderate HiPIMS conditions (moderate peak powers) resulting in only a small loss in mass-deposition rate compared to DCMS. It was further found that TiO2 films with anatase and rutile phases can be grown at room temperature without substrate heating and without post-deposition annealing.
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  • Alarcón, José Faúndez, et al. (författare)
  • REACTIVE CONTROL OF BYPASS TRANSITION IN A WING BOUNDARY LAYER
  • 2022
  • Ingår i: 33rd Congress of the International Council of the Aeronautical Sciences, ICAS 2022. - : International Council of the Aeronautical Sciences. ; , s. 3037-3047
  • Konferensbidrag (refereegranskat)abstract
    • This investigation deals with the numerical implementation of a data-driven method for reactive control of the boundary-layer over a NACA0008 airfoil. The aim of this work is to evaluate the performance of controller in damping the flow disturbances and its efficiency in delaying laminar-turbulent transition. We focus our attention on the bypass transition scenario caused by free-stream turbulence. In this scenario, the perturbations in the wing boundary-layer develop into streaky structures. We show that this data-driven method is effective in decreasing the wall shear stress and disturbance energy at the objective location, and this damping is sustained downstream of the objective location. However, further downstream, the fluctuations grow again reaching amplitudes similar to those in the uncontrolled case.
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  • Alexandersson, Claes, et al. (författare)
  • Vuxen att lära?
  • 1984
  • Bok (övrigt vetenskapligt/konstnärligt)abstract
    • En analys och diskussion kring främst frågor om undervisning, inte minst föreställningen om att vuxna skall undervisas med utgångspunkt av deras erfarenheter.
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