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Träfflista för sökning "WFRF:(Sandberg A) srt2:(1980-1989)"

Sökning: WFRF:(Sandberg A) > (1980-1989)

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  • Arnbjörnsson, E., et al. (författare)
  • Appendicectomy in the elderly, incidence and operative findings.
  • 1983
  • Ingår i: Annales Chirurgiae et Gynaecologiae. - 0355-9521. ; 72:4, s. 223-228
  • Tidskriftsartikel (refereegranskat)abstract
    • The incidence during the last decades of acute appendicitis and the number of appendicectomies in the elderly, 60 years of age and older were studied. In addition, the incidence of the disease and of appendicectomy and the preoperative findings were studied in a well defined population during the twelve year period from 1969 to 1980. The results showed that there was no increase in the sex- and age-specific incidence of acute appendicitis in the elderly. However, there has been a significant decrease in the incidence of acute appendicitis in the elderly during the last four decades. Furthermore, a significant difference was found in the findings in the elderly operated upon because of suspected acute appendicitis compared to the younger age groups. The percentage of perforated appendices and normal appendices was significantly higher in the elderly. This difference might be of importance to the surgeon in his approach to an elderly patient admitted because of suspected acute appendicitis.
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  • Ejsmont, Jerzy A., et al. (författare)
  • Influence of Tread Pattern on Tire/Road Noise
  • 1984
  • Ingår i: SAE technical paper series. - : Society of Automotive Engineers. - 0148-7191. ; 93:5, s. 632-640
  • Tidskriftsartikel (refereegranskat)abstract
    • An indoor road-wheel facility at the Technical University of Gdańsk was used to study the noise emission from a variety of tires with different tread patterns. The tires were run both on a smooth steel drum and a drum covered by a replica road surface. All tread patterns were hand-cut to generate several families of simple treads with regular pitch for a systematic study of how groove design influences noise. Most of the observed, tread influenced phenomena could be explained by generation mechanisms such as radial vibrations induced by tread block impact, pocket air pumping and pipe resonances in the grooves. For instance, it was observed that, when speed increases, sooner or later the tread block impact frequency will coincide with the pipe resonance frequency and then generate excessive noise at that speed.
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  • Resultat 1-10 av 16

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