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signaling

(Encyclopedia)signaling, transmission of information by visible, audible, or other detectable means. Since prehistoric times humans have sought and employed ever more effective means of communicating over distance....

rock carvings and paintings

(Encyclopedia)rock carvings and paintings, designs inscribed on rock surfaces and huge stone monuments in many parts of the world by prehistoric or preindustrial peoples. They have been found on every continent and...

Pledge of Allegiance

(Encyclopedia)Pledge of Allegiance, in full, Pledge of Allegiance to the Flag of the United States of America, oath that proclaims loyalty to the United States. and its national symbol. It reads: “I pledge allegi...

Ross, Betsy

(Encyclopedia)Ross, Betsy, 1752–1836, American seamstress, b. Philadelphia. Her full name was Elizabeth Griscom Ross Ashburn Claypoole. She is known to have made flags during the American Revolution, although the...

sociology

(Encyclopedia)sociology, scientific study of human social behavior. As the study of humans in their collective aspect, sociology is concerned with all group activities—economic, social, political, and religious. ...

Chambord, Henri Charles Ferdinand Marie Dieudonné, comte de

(Encyclopedia)Chambord, Henri Charles Ferdinand Marie Dieudonné, comte de äNrēˈ shärl fĕrdēnäNˈ märēˈ dyödônāˈ kôNt də shäNbôrˈ [key], 1820–83, Bourbon claimant to the French throne, posthumo...

Lewis, Clarence Irving

(Encyclopedia)Lewis, Clarence Irving, 1883–1964, American philosopher, b. Stoneham, Mass., grad. Harvard (B.A., 1906; Ph.D., 1910). After teaching (1911–20) at the Univ. of California, he was professor of philo...

note, in music

(Encyclopedia)note, in musical notation, symbol placed on or between the lines of a staff to indicate the pitch and the relative duration of the tone to be produced by voice or instrument. The largest note value in...

W and Z particles

(Encyclopedia)W and Z particles, elementary particles that mediate, or carry, the fundamental force associated with weak interactions. The discovery of the W and Z particles at CERN near Geneva, Switzerland, in the...

Weaver, Warren

(Encyclopedia)Weaver, Warren, 1894–1978, American scientist, b. Reedsburg, Wis., grad. Univ. of Wisconsin. He taught mathematics at Wisconsin (1920–32), was director of the division of natural sciences at the R...