The emergence of SARS-CoV-2 highlights a need for evidence-based strategies to monitor bat viruses. We performed a systematic review of coronavirus sampling (testing for RNA positivity) in bats ...

The method of systematic random sampling (METHOD=SYS) selects units at a fixed interval throughout the sampling frame or stratum after a random start. PROC SURVEYSELECT chooses the first unit randomly ...

If you specify the option METHOD=PPS_SYS, PROC SURVEYSELECT selects units by systematic random sampling with probability proportional to size. Systematic sampling selects units at a fixed interval ...

Systematic sampling means testing a hypothesis by taking several equally spaced items from a larger list, eg selecting the tenth, 20th and 30th visitor to a theme park. This can be particularly useful ...

Radiation-Induced Heart Disease After Breast Cancer Treatment: How Big a Problem, and How Much Can—and Should—We Try to Reduce It? Impact of Examined Lymph Node Count on Precise Staging and Long-Term ...

Scientists from 25 countries have received IAEA training on environmental sampling analysis to help them mitigate the impacts of radioactivity in the environment. The IAEA’s training workshop for the ...