Discover how simple random sampling ensures accurate and unbiased population research, offering efficiency and fairness over ...

Sampling is a type of scientific surveying which can save time and money and give information on the population of animals and plants. There are many different types of sampling; the most useful type ...

This file type includes high resolution graphics and schematics when applicable. Author’s note: Early in my engineering career, I accepted a research project to characterize light transmission ...

Sampling is a technique in which samples are drawn at random (without any favor or bias). For this, suitable measures or procedures may be laid down and adopted according to the nature and ...

Traditional grab sampling methods require supplementary devices such as electric pumps, batteries, charging devices, calibrators, tubing, connectors, and auxiliary equipment. The collection of whole ...

Scattering-type scanning near-field optical microscopy (s-SNOM) allows spectroscopic imaging with spatial resolution below the diffraction limit. With suitable light sources, s-SNOM is instrumental in ...

You don't have to be a certified industrial hygienist to do personal air sampling." That's what I've told hundreds of participants in introductory industrial hygiene courses I have taught since 1994.