This article discusses practical problems in connexion with the taking of sample surveys for demographic inquiries in undeveloped countries. The discussion is divided into three main topics, dealing ...

Over the past several years, it has become abundantly clear that molecular events not only can be defined in prostate cancer but also can affect the treatment of patients and can have important ...

The idea of unit testing has been around for many years. "Test early, test often" is a mantra that concerns unit testing as well. However, in practice, not many software projects have the luxury of ...

The objective of a particle size analysis may be to obtain a bulk powder measurement to explore dusting tendency, filter blockage, or flowability, or to get the primary size of a particle system to ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...