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.
Memoirs are factual stories about someone's life. 'Memoir' is from the French word memoire, mÃ©moire which 'means' reminiscence 'or.' Memory they are a part of the nonfiction literary genre and are usually told in the first. personesson Summary. Memoirs are a subgenre of the autobiography. They are different from standard autobiographies because they are more focused. An autobiography usually spans a person's entire life, while a memoir may concentrate on a particular time or place in the writer's life.