Symbols of the Federal Bureau of Investigation of the FBI; the red stripes stand for courage, valor, and strength, while the white ones represent light, cleanliness, and truth. Below the wreath and shield is a scroll bearing the words "Fidelity, Bravery, Integrity". This slogan, which was devised in 1935 by FBI Inspector W.H. Drane Lester, describes the high moral standards and high level of motivation the FBI expects from its staff. It also reflects the Bureau's own initials as a "backronym" of sorts. However, a "Newsweek" article from 2008 credits Edward Allen Tamm, once a top aide to J. Edgar Hoover who regularly briefed President Franklin Roosevelt
Fidelity of the realism of a model or simulation. Simulation fidelity has also been described in the past as "degree of similarity". In quantum mechanics and optics, the fidelity of a field is calculated as an overlap integral of the field of interest with a reference or target field. In the field of program evaluation, the term fidelity denotes how closely a set of procedures were implemented as they were supposed to have been. For example, it is difficult to draw conclusions from a study about formative assessment in school classrooms if the teachers are not able or willing to follow