Ralf Knuth

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  • R H Knuth
  • American Industrial Hygiene Association journal
  • 1984
A Sierra Model 235 slotted impactor was used to measure the particle size distribution of ore dust in uranium concentrating mills. The impactor was calibrated at a flow rate of 0.21 m3/min, using solid monodisperse particles of methylene blue and an impaction surface of Whatman #41 filter paper soaked in mineral oil. The reduction from the impactor's design(More)
The world forests are in the focus of the United Nations global forest assessment and GSE Forest Monitoring initiative. Due to the remoteness of the boreal and tropical forest, their widespread distribution and their hard accessibility remote sensing technology provides suitable means for a sound monitoring. Anchored in the Landsat optical remote sensing(More)
Climate change is a factor that largely contributes to the increase of forest areas affected by natural damages. Therefore, the development of methodologies for forest monitoring and rapid assessment of affected areas is required. Space-borne synthetic aperture radar (SAR) imagery with high resolution is now available for large-scale forest mapping and(More)
The survival of many tropical forest areas worldwide is critically endangered. To prevent further damage up to date land cover information is crucial. Only the remote sensing technology allows for a robust, area-wide monitoring of these vast forested areas. It is widely accepted that currently only microwave remote sensing provides the means for an almost(More)
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