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Träfflista för sökning "WFRF:(Persson Willy) "

Search: WFRF:(Persson Willy)

  • Result 1-12 of 12
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1.
  • Svanberg, Sune, et al. (author)
  • Applications of terawatt lasers
  • 1994
  • In: LASER SPECTROSCOPY - XITH INTERNATIONAL CONFERENCE. - : AIP. - 1551-7616 .- 0094-243X. - 1563962624 ; :290, s. 264-269
  • Conference paper (peer-reviewed)
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3.
  • Krassig, B, et al. (author)
  • High-l satellite states in the threshold photoelectron spectrum of argon
  • 1996
  • In: Journal of Physics B: Atomic, Molecular and Optical Physics. - : IOP Publishing. - 0953-4075 .- 1361-6455. ; 29:12
  • Journal article (peer-reviewed)abstract
    • An interpretation is given of the threshold photoelectron spectrum of Ar between the P-3 and D-1 double-ionization thresholds. In this region the observed spectrum is less cluttered than below the P-3 thresholds and the interpretation is more straightforward. One of the characteristic features of the spectrum is the excitation to Rydberg orbitals with high angular momentum l in agreement with the Wannier picture as first discussed by Fano in 1974.
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4.
  • Nilsson, Carl Magnus, 1971-, et al. (author)
  • Application of optical spectroscopy to paper production
  • 1999
  • In: Optical measurement systems for industrial inspection. - Bellingham, Washington : SPIE - International Society for Optical Engineering. - 0819433101 ; , s. 318-325
  • Conference paper (peer-reviewed)abstract
    • Fluorescence from paper following excitation by either ultraviolet or visible light gives information on the chemical composition of the paper. This can be used for on-line monitoring of the paper during production. Such measurements can be performed non-intrusively at sampling rates high enough to give a sub-millimetre resolution at paper webs moving at velocities higher than 20 metres per second. Two types of fluorescence meters, operating at different wavelengths, have been constructed. Together with an optical speedometer they have been tested at newsprint producing paper mills. A fluorescence based method for scanning cross-directional newsprint profiles in the laboratory has been developed. From these measurements the relative shrinkage of the paper during drying can be calculated using time-frequency analysis.
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6.
  • Persson, Willy, et al. (author)
  • Spectrum of Doubly Ionized Neon
  • 1991
  • In: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 43:9, s. 4791-4823
  • Journal article (peer-reviewed)abstract
    • The spectrum of doubly ionized neon (Ne III), emitted from hollow-cathode and theta-pinch discharges, has been photographically recorded in the 430 - 12 000-angstrom wavelength range. The number of classified lines has been increased from about 100 to about 750, and the number of experimentally established energy levels from 60 to 230. The level scheme comprises levels in the 2s(2)2p4, 2s2p5, 2p6, 2s(2)2p(3)3s-8s, 3p-5p, 3d-5d, 4f-8f, and 5g-7g configurations. The experimentally observed level distribution are compared with the results of Hartree-Fock calculations and least-squares fits.
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7.
  • Persson, Willy, et al. (author)
  • Spectrum of Rb IV
  • 1985
  • In: Physica Scripta. Topical Issues. - : IOP Publishing. - 0281-1847. ; 31:6, s. 487-505
  • Journal article (peer-reviewed)
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8.
  • Persson, Willy, et al. (author)
  • Spectrum of SrV
  • 1984
  • In: Physica Scripta. Topical Issues. - : IOP Publishing. - 0281-1847. ; 30:3, s. 169-185
  • Journal article (peer-reviewed)
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10.
  • Smith, Emily R, et al. (author)
  • Modifiers of the effect of maternal multiple micronutrient supplementation on stillbirth, birth outcomes, and infant mortality : a meta-analysis of individual patient data from 17 randomised trials in low-income and middle-income countries.
  • 2017
  • In: The Lancet Global Health. - 2214-109X. ; 5:11, s. e1090-e1100
  • Journal article (peer-reviewed)abstract
    • BACKGROUND: Micronutrient deficiencies are common among women in low-income and middle-income countries. Data from randomised trials suggest that maternal multiple micronutrient supplementation decreases the risk of low birthweight and potentially improves other infant health outcomes. However, heterogeneity across studies suggests influence from effect modifiers. We aimed to identify individual-level modifiers of the effect of multiple micronutrient supplements on stillbirth, birth outcomes, and infant mortality in low-income and middle-income countries.METHODS: This two-stage meta-analysis of individual patient included data from 17 randomised controlled trials done in 14 low-income and middle-income countries, which compared multiple micronutrient supplements containing iron-folic acid versus iron-folic acid alone in 112 953 pregnant women. We generated study-specific estimates and pooled subgroup estimates using fixed-effects models and assessed heterogeneity between subgroups with the χ(2) test for heterogeneity. We did sensitivity analyses using random-effects models, stratifying by iron-folic acid dose, and exploring individual study effect.FINDINGS: Multiple micronutrient supplements containing iron-folic acid provided significantly greater reductions in neonatal mortality for female neonates compared with male neonates than did iron-folic acid supplementation alone (RR 0·85, 95% CI 0·75-0·96 vs 1·06, 0·95-1·17; p value for interaction 0·007). Multiple micronutrient supplements resulted in greater reductions in low birthweight (RR 0·81, 95% CI 0·74-0·89; p value for interaction 0·049), small-for-gestational-age births (0·92, 0·87-0·97; p=0·03), and 6-month mortality (0·71, 0·60-0·86; p=0·04) in anaemic pregnant women (haemoglobin <110g/L) as compared with non-anaemic pregnant women. Multiple micronutrient supplements also had a greater effect on preterm births among underweight pregnant women (BMI <18·5 kg/m(2); RR 0·84, 95% CI 0·78-0·91; p=0·01). Initiation of multiple micronutrient supplements before 20 weeks gestation provided greater reductions in preterm birth (RR 0·89, 95% CI 0·85-0·93; p=0·03). Generally, the survival and birth outcome effects of multiple micronutrient supplementation were greater with high adherence (≥95%) to supplementation. Multiple micronutrient supplements did not significantly increase the risk of stillbirth or neonatal, 6-month, or infant mortality, neither overall or in any of the 26 examined subgroups.INTERPRETATION: Antenatal multiple micronutrient supplements improved survival for female neonates and provided greater birth-outcome benefits for infants born to undernourished and anaemic pregnant women. Early initiation in pregnancy and high adherence to multiple micronutrient supplements also provided greater overall benefits. Studies should now aim to elucidate the mechanisms accounting for differences in the effect of antenatal multiple micronutrient supplements on infant health by maternal nutrition status and sex.
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11.
  • Wendt, W, et al. (author)
  • Application of Emission and Absorption-spectroscopy For Characterization of A Copper Converting Process
  • 1988
  • In: Applied Spectroscopy. - : SAGE Publications. - 1943-3530 .- 0003-7028. ; 42:1, s. 128-133
  • Journal article (peer-reviewed)abstract
    • The emission and absorption spectra of a copper converter flame have been investigated. It was found that the emission spectra consisted of Planck radiation and superimposed discrete structures. The band structure was dominated by PbS in the slag-making stage and by PbO in the copper-making stage. Towards the end of the slag-making stage the ratio of the PbO and PbS band intensities (PbO/PbS) changed, in good agreement with thermodynamical calculations. Absorption measurements were performed during the copper-making stage, where the absorption edge of SO2 at about 380 nm was the dominating feature. The implications of these measurements for process steering and control are discussed.
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  • Result 1-12 of 12

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