Continuous track

src: thumbs.dreamstime.com Continuous track , also called tank tread or caterpillar track , is a system of vehicle propulsion in which a co...

Mobile phone tracking

src: www.sherlockphones.com Mobile phone tracking is the ascertaining of the position or location of a mobile phone, whether stationary or ...

Long-distance running

src: www.runforwealth.com Long-distance running , or endurance running , is a form of continuous running over distances of at least eight ki...

Sleep cycle

src: www.macalester.edu The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep, sometimes called the...

Information ratio

src: i.ytimg.com The information ratio , also known as appraisal ratio , is a measure of the risk-adjusted return of a financial security (o...