[Analysis of harmful factors in abortion and premature labor].
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Abortion, Spontaneous↗
Biomedical subjects
P Jankowiak
Publications and source records attributed to P Jankowiak.
Reported morbidity and the weather.
Some observations have been made about the influence of the weather on the use of the general-practitioner service. It is difficult to disentangle the biological and behavioural components of these findings, but in general extremes of weather-low temperatures and sunshine in winter and high temperatures and sunshine in summer-appeared to increase the numbers of reported episodes of respiratory illness.
Adolescent↗
Temperature-pressure compensation for a linear accelerator electron beam dosimeter.
Routine weekly calibration of a Siemens Mevatron 20 linear accelerator with 3-, 5-, 7-, 10-, 12-, 15-, and 18-MeV electron energies demonstrated fluctuations in dose/monitor unit for the electron beam on the order of 3%-6%. Evaluations and study of the problem demonstrated that the electron chamber, which is open to atmosphere, was undergoing significant temperature changes during the course of a treatment day. The inability of the chamber to compensate for these changes in temperature and pressure led to the addition of a compensating circuit by the manufacturer. The results of the addition of this circuit were evaluated for several extended periods throughout the year, and it was found that the changes in dose/monitor were reduced to approximately +/- 0.5%.
Calibration↗