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Resistivity investigation and monitoring for detection of internal erosion and anomalous seepage in embankment dams

Methods for monitoring seepage and detecting internal erosion are essential for the safety evaluation of embankment dams. Internal erosion is one of the major reasons for embankment dam failures, and there are several tenths of thousands of large embankment dams in the world. Internal erosion is progressing inside the dam, and is sometimes difficult to detect by conventional methods. Therefore, th

Gas in Scattering Media Absorption Spectroscopy – Laser Spectroscopy in Unconventional Environments

An overview of the new field of Gas in Scattering Media Absorption Spectroscopy (GASMAS) is presented. The GASMAS technique combines narrow-band diode-laser spectroscopy with optical propagation in diffuse media. Whereas solids and liquids have broad absorption features, free gas in pores and cavities in the material is characterized by sharp spectral signatures. These are typically 10,000 times s

High Blood Cholesterol. Physician and Patient Perspectives.

Popular Abstract in Swedish De vetenskapliga bevisen för att högt blodkolesterol ökar risken för hjärtinfarkt medförde under 80-talet stort intresse för kolesterolsänkning både inom sjukvården och bland allmänheten. Syftet med avhandlingsarbetet var att studera hur läkare och patienter uppfattade och använde kunskaperna om högt blodkolesterol, och hur läkare och receptarier värderade sin egen och Scientific evidence of the causal relationship between high blood cholesterol and risk for coronary heart disease prompted extensive professional and public interest in practical application in the 1980's. Among other things, national guidelines for lipid lowering were published in Sweden in 1988. Mass media covered the topic extensively. The aims of this study were to analyze aspects of physician

Surface temperature measurement of flame spread using thermographic phosphors

A technique based on remote measurements of surface temperature in connection to fires is presented. Pulsed ultraviolet laser radiation at 266 nm and 7 ns duration was used to excite a thermographic phosphor, Mg4FGeO6: Mn, which was adapted on the surface of the investigated material. The laser-induced emission from the phosphor was recorded. A calibration of the phosphorescence lifetime and spect