A method of determining accuracy and precision for dosimeter systems using accreditation data.

A study of the uncertainty of dosimeter results is required by the national accreditation programs for each dosimeter model for which accreditation is sought. Typically, the methods used to determine uncertainty have included the partial differentiation method described in the U.S.

The neutron energy response of the Panasonic Model 809 personnel dosimeter.

In 2010, the U.S. Department of Energy will adopt a new set of radiation weighting factors and quality factors to be consistent with values recommended by the International Commission on Radiological Protection.

On the origin of pattern and form in early Metazoans.

The 'Cambrian explosion', about 540 million years ago, may have occurred within 10 to 50 million years. Almost all of the modern phyla, a very restricted group and many groups that may represent extinct phyla, suddenly appear near that time in the fossil record. Numerous extensive periods of mass extinction since that time led to no new phyla.