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.
The Fundamental Differences between Memoir and Autobiography. The line between memoir and autobiography is a fuzzy one, especially in this modern literary era where writers are constantly blurring the boundaries between genres to create a new, exciting one. Like an autobiography, a memoir is a narrative that reveals experiences within the author's lifetime. But there are obvious and practical differences between the two similar genres.