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Träfflista för sökning "WFRF:(Larsson Rolf) srt2:(2005-2009)"

Sökning: WFRF:(Larsson Rolf) > (2005-2009)

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  • Hassan, Emadeldeen, et al. (författare)
  • Compact Differential-Fed Planar Filtering Antennas
  • 2019
  • Ingår i: Electronics. - : MDPI. - 2079-9292. ; 8:11
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper proposes novel low-profile differential-fed planar antennas with embedded sharp frequency selectively. The antennas are compact and easy to integrate with differential devices without matching baluns. The antenna design is formulated as a topology optimization problem, where requirements on impedance bandwidth, directivity, and filtering are used as the design objectives. The optimized antennas operate over the frequency band 6.0-8.5 GHz. The antennas have reflection coefficients below -15 dB, cross-polarization levels below -42 dB, a maximum gain of 6.0 +/- 0.5 dB, and a uniform directivity over more than 130 degrees beamwidth angle in the frequency band of interest. In addition, the antennas exhibit sharp roll-off between the operational band and frequencies around the 5.8 GHz WiFi band and the 10 GHz X-band. One antenna has been fabricated with a good match between simulation and measurement results.
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44.
  • Hassan, Jawad, et al. (författare)
  • Influence of Growth Mechanism on Carrier Lifetime in on-axis Homoepitaxial Layers of 4H-SiC
  • 2012
  • Ingår i: Materials Science Forum Vols 717 - 720. - : Trans Tech Publications Inc.. ; , s. 157-160
  • Konferensbidrag (refereegranskat)abstract
    • In this report we present homoepitaxial growth of 4H-SiC on Si-face, nominally on-axis substrates with diameters up to 76 mm in a hot-wall chemical vapor deposition reactor. A comparatively low carrier lifetime has been observed in these layers; local variations in carrier lifetime are different from standard epilayers on off-cut substrates. The properties of the layers were studied with focus on charge carrier lifetime and its correlation with starting growth conditions, inhomogeneities of surface morphology and different growth mechanisms.
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45.
  • Holme, Lotta, et al. (författare)
  • Handikapphistorisk forskning : En översikt
  • 2001. - 1
  • Ingår i: Humanistisk hälsoforskning. - Lund : Studentlitteratur. - 9144018916 - 9789144018911 ; , s. 209-242
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • I tio artiklar belyses den forskning inom hälsoområdet som bedrivs av bland andra antropologer, etnologer, sociologer, historiker och filosofer i Sverige. Boken kan tjäna som utgångspunkt eller  kurslitteratur för dem som vill få en överblick över vilka frågor och områden som behandlats i den humanistiska hälsoforskningen
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46.
  • Hovén, Emma, 1983-, et al. (författare)
  • Losing a child to adolescent cancer : A register‐based cohort study of psychotropic medication use in bereaved parents
  • 2023
  • Ingår i: Cancer Medicine. - : John Wiley & Sons. - 2045-7634. ; 12:5, s. 6148-6160
  • Tidskriftsartikel (refereegranskat)abstract
    • PurposeTo investigate the short- and long-term risk of psychotropic medication use in parents who lose a child to cancer diagnosed in adolescence.MethodsThis is a Swedish nationwide register-based study including 184 bereaved mothers and 184 bereaved fathers of 184 children diagnosed with cancer in adolescence. Logistic regression analyses, adjusted for sociodemographic characteristics and history of mental health problems, were performed to estimate risk of a prescription of psychotropic medication (anxiolytics, hypnotics/sedatives, antidepressants) in cancer-bereaved parents from 1 year before to 5 years after the child's death, with a general population sample of non-bereaved parents (n = 3291) as referents.ResultsAt the year of the child's death, 28%–36% of mothers and 11%–20% of fathers had a prescription of anxiolytics, hypnotics/sedatives or antidepressants. The corresponding percentages for non-bereaved mothers and fathers were 7%–12% and 4%–7%, respectively. Compared to non-bereaved mothers, bereaved mothers showed higher odds of prescriptions from 1 year before up to four (anxiolytics) and 5 years (hypnotics/sedatives and antidepressants) after the child's death. Bereaved fathers showed higher odds than non-bereaved fathers of prescriptions from 1 year before up to the year of (anxiolytics and hypnotics/sedatives) and 1 year after (antidepressants) the child's death. No differences in odds between bereaved and non-bereaved fathers were found at 2 years after the child's death. Being unmarried, born outside Sweden, and having a history of mental health problems were associated with higher odds of prescribed medications.ConclusionsIndicative of mental health problems of clinical importance, cancer-bereaved parents had a higher prevalence of use of psychotropic medication. A decrease in medication use was evident with time, but still at 5 years after the child's death mothers displayed a higher use while fathers showed no difference to non-bereaved fathers after 2 years.
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