Part of the IT standards and organizations glossary: The Stefan-Boltzmann constant, symbolized by the lowercase Greek letter sigma (), is a physical constant involving black body radiation.A black body, also called an ideal radiator, is an object that radiates or absorbs energy with perfect efficiency at all electromagnetic wavelength s.art of the IT standards and organizations glossary: The Stefan-Boltzmann constant, symbolized by the lowercase Greek letter sigma (), is a physical constant involving black body radiation.
Definition of memoir for English Language Learners. memoirs : a written account in which someone (such as a famous performer or politician) describes past experiences.
From Memories to Memoirs, Part 10 â Structuring Your Memoir. Memoir isnât the summary of a life; itâs a window into a life, very much like a photograph in its selective composition. It may look like a casual and even random calling up of bygone events. Itâs not; itâs a deliberate construction.