The plasma jet: industrial hygiene aspects and a survey of current United States practices for employee protection.
Abstract The plasma torch, because it concentrates large amounts of thermal energy in a small volume, has become increasingly popular in industry. During the past fifteen years, the plasma torch has developed into an important industrial tool, and it has been used for metal cutting and welding fabricating operations that would not be possible otherwise. However, along with technological advances, the plasma torch has presented new problems to the industrial hygiene field. It is the purpose of this paper to discuss these problems and the extent of industrial hygienist's awareness of them. A brief outline of the theory of the plasma torch and the history and scope of its industrial usage is also presented.
Plasma Spraying Techniques for Toxic and Oxidizable Materials
Plasma spraying has made it possible to deposit materials which were heretofore considered as unsprayable. Two categories of materials are discussed—materials which have a toxicity problem associated with their handling, and those which undergo rapid oxidation and composition changes when sprayed in air.
L-band 3D imaging of an Alpine Glacier: Results from the AlpTomoSAR campaign
In this paper we present results from the tomographic analysis of L-Band SAR data acquired in February/March 2014 over the Mittelbergferner glacier, Austrian Alps, during the ESA campaign AlpTomoSAR. The campaign includes coincident in-situ measurements of snow and ice properties, as well as high-frequency Ground Penetrating Radar (GPR) data acquired over a total length of 18 km. The analyses of three-dimensional TomoSAR data cubes shows the complexity of the glacier sub-surface scattering. Most areas are characterized by surface scattering in proximity of the Lidar surface, plus a complex pattern of in-depth volumetric scattering beneath. Various subsurface features observed in GPR transects at 600 MHz and 200 MHz clearly showed up in TomoSAR sections as well. In particular: firn bodies, crevasses, and even the bedrock down to 50 m below the ice surface.