Cepheid variable stars exhibit regular pulsations whose period directly correlates with their intrinsic brightness (absolute luminosity). The Leavitt law establishes this relationship between ...

iOS 18.4 adds a few fresh capabilities to Apple's mobile operating system. Here’s what’s new and how to download the update. Amazon's sale event ends tonight, so this is your last chance to save on ...

This is a preview. Log in through your library . Abstract This study evaluated 928 students over a period of two 16-week semesters. Attendance, gender, classification, and major were recorded for all ...

Full factorial DOE, or Design of Experiments, is a method of designed experimentation. Using this method you manipulate the controllable factors (independent variables or inputs) in your process at ...

Sankhyā: The Indian Journal of Statistics, Series B (1960-2002), Vol. 58, No. 2 (Aug., 1996), pp. 231-239 (9 pages) In the study of experiments with mixtures, the ...

A friend–we’ll call her Polly, short for Pollyanna, for reasons that will become obvious–is unrelentingly positive. Always cheerful. Always enthusiastic. She’s the happiest person I know. Except, ...

A recent news story describing how scientists in China generated the first human-monkey chimeric embryos (unborn monkeys with human body parts)—a deliberate and unnatural crossing of species—sent ...