The starting point of the Spanish experience in the study of High Background Radiation Areas is the development of a nationwide indoor radon survey carried out in 1988. This campaign, belonging to the first Spanish Radon Framework, consisted of approximately 2000 indoor radon measurements which represented a valuable basis to face rigorously the radon issue in Spain. Together but indepently fro...

Because (222)Rn is a progeny of (238)U, the relative abundance of uranium may be used to predict the areas that have the potential for high indoor radon concentration and therefore determine the best areas to conduct future surveys. Geographic Information System (GIS) mapping software was used to construct maps of South Dakota that included levels of uranium concentrations in soil and stream wa...

Although United Kingdom (UK) Building Regulations applicable to houses constructed since 1992 in Radon Affected Areas address the health issues arising from the presence of radon in domestic properties and specify the installation of radon-mitigation measures during construction, no legislative requirement currently exists for monitoring the effectiveness of such remediation once construction i...

In an automatic document conversion system, which builds digital documents from scanned articles, there is the need to perform various adjustments before the scanned image is fed to the OCR system. This is because the OCR system is prone to error when the text is not properly identified, aligned, de-noised, etc. Such an adjustment is the detection of page skew, an unintentional rotation of the ...

Radon prone houses are often associated with uranium-rich geologic formations, but these formations are difficult to predict in the absence of indoor radon measurements. Even with data, it may be difficult to specify a hot spot if the area does not conform with established administrative boundaries or if there is uncertainty to the specific test location due to confidentiality. Radon in soil ga...

In situ radon monitoring is necessary to characterize and qualify workplace and other environments in order to determine the need for occupational exposure assessments, to demonstrate compliance with standards and to verify the effectiveness of mitigation efforts. A web-based, energy sensitive electrostatic chamber radon monitoring system, developed at the University of Guelph, can be used to a...

The Alabama Radon Program conducted a study to see if short-term radon tests performed during the summer air-conditioning season, and having results less than the U.S. Environmental Protection Agency (U.S. EPA) action level of 1.48x10(2) Bq m-3 (4.0 pCi L-1), were a reliable means in determining whether a house is in need of a radon removal system. Using a database of past Alabama Radon Program...