Rock and roll (often written as rock & roll, rock 'n' roll, or rock n roll) is a genre of popular music that evolved in the United States during the late 1940s and early 1950s. It originated from African-American music such as jazz, rhythm and blues, boogie-woogie, gospel, jump blues, as well as country music. While rock and roll's formative elements can be heard in blues records from the 1920s and in country records of the 1930s, the genre did not acquire its name until 1954.
According to journalist Greg Kot, "rock and roll" refers to a style of popular music originating in the United States in the 1950s. By the mid-1960s, rock and roll had developed into "the more encompassing international style known as rock music, though the latter also continued to be known in many circles as rock and roll." For the purpose of differentiation, this article deals with the first definition.
In the earliest rock and roll styles, either the piano or saxophone was typically the lead instrument. These instruments were generally replaced or supplemented by guitar in the middle to late 1950s. The beat is essentially a dance rhythm with an accentuated backbeat, almost always provided by a snare drum. Classic rock and roll is usually played with one or two electric guitars (one lead, one rhythm) and a double bass (string bass). After the mid-1950s, electric bass guitars ("Fender bass") and drum kits became popular in classic rock.
Rock and roll had a polarizing influence on lifestyles, fashion, attitudes, and language. It is often portrayed in movies, fan magazines, and on television. Some people believe that the music had a positive influence on the civil rights movement, because both Black American and White American teenagers enjoyed it.
The term "rock and roll" is defined by Greg Kot in Encyclopædia Britannica as the music that originated in the mid-1950s and later developed "into the more encompassing international style known as rock music". The term is sometimes also used as synonymous with "rock music" and is defined as such in some dictionaries.
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This course deals with the main aspects of seismic design and assessment of buildings including conceptual design. It covers different structural design and evaluation philosophies for new and existin
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Rhythm and blues, frequently abbreviated as R&B or R'n'B, is a genre of popular music that originated in African-American communities in the 1940s. The term was originally used by record companies to describe recordings marketed predominantly to African Americans, at a time when "rocking, jazz based music ... [with a] heavy, insistent beat" was becoming more popular. In the commercial rhythm and blues music typical of the 1950s through the 1970s, the bands usually consisted of a piano, one or two guitars, bass, drums, one or more saxophones, and sometimes background vocalists.
Elvis Aaron Presley (January 8, 1935 – August 16, 1977), often referred to mononymously as Elvis, was an American singer and actor. Known as the "King of Rock and Roll", he is regarded as one of the most significant cultural figures of the 20th century. Presley's energized interpretations of songs and sexually provocative performance style, combined with a singularly potent mix of influences across color lines during a transformative era in race relations, led him to both great success and initial controversy.
Hip hop or hip-hop, also known as rap and formerly known as disco rap, is a genre of popular music that was originated in the Bronx borough of New York City in the early 1970s by African Americans, having existed for several years prior to mainstream discovery. Hip hop originated as an anti-drug and anti-violence genre, while consisting of stylized rhythmic music (usually built around drum beats) that commonly accompanies rapping, a rhythmic and rhyming speech that is chanted.
Explores dynamical scattering in electron diffraction, discussing challenges in interpreting diffraction patterns and applications in crystal defect imaging and phase discrimination.
The development and construction of offshore wind farms requires the correct estimation of the friction that can be mobilised at the rock/grout interface. In conventional studies, the shear behaviour of a joint is usually investigated with laboratory tests ...
While hydro-mechanical coupling in rocks is generally well understood, exotic rock poroelastic responses-such as unexpected dependence to fluid diffusion time and low skeleton moduli-have been reported. Hydro-mechanical coupling, or poroelasticity, explain ...
While water is known to significantly reduce the strength of rocks, there remains a paucity of data on water-weakening of gypsum. Here, we quantify water-weakening in a natural gypsum facies from Monferrato (Italy) by performing experiments on nominally dr ...