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Olavo Luiz Pimentel de Carvalho (Campinas, April 29, 1947) is a Brazilian journalist,, and essayist on several issues like the history of astrology and mysticism; the history of revolutionary mentality; and philosophical anthropology, known for his conservative political stances, and for being a vehement critic of leftist.

Now living in the United States in the state of Virginia, he is an international correspondent and writes a weekly column for the Brazilian newspaper Diário do Comércio. He also teaches philosophy on a free course to over 1000 students online. Carvalho has previously written for several other magazines and newspapers, such as Bravo!, Primeira Leitura, O Globo, Época and Zero Hora, and taught philosophy to a smaller circle of students, while still living in Brazil. He also translated to Portuguese works of important philosophers of the 20th century, such as the Romanian Constantin Noica, the Spanish Xavier Zubiri, the French René Guénon, the German-American Eric Voegelin and Leo Strauss. He has commented and developed researches and theories on the works of Aristotle. He has also delivered lectures on his own work and on the work of several of those philosophers mentioned above.

Luigino Celestino Di Agostino (born 17 December 1967), better known by his stage name Gigi D'Agostino, is an Italian DJ, remixer and record producer. In 1986, he started his career as a DJ-spinning Italo Disco, and releasing his first mix, titled "Psychodelic".

Born in Turin, D'Agostino spent his childhood between his native city of Turin and Brescia, where the Media Records studios are located. As a child, D'Agostino wanted to be someone in the world of disco music. Starting out working as a stonemason and a fitter, he began his musical career as a DJ by organizing parties in clubs. His debut was in a club near Turin called "Woodstock". He was a resident DJ of an Italian disco named Ultimo Impero from 1993 to 1998.

D'Agostino's first release was Noise Makers Theme, a double-A sided record with a track by Daniele Gas on the other side, which launched the Noise Maker label, under the direction of Italian house producer Gianfranco Bortolotti. D'Agostino would continue working with Gas, as well as Mauro Picotto's production team in the following years. His 1999 single "Bla Bla Bla" became a major hit in Europe. He described the single as "a piece I wrote thinking of all the people who talk and talk without saying anything!" As a DJ, D'Agostino is known as one of the "pioneers of Mediterranean Progressive Dance," consisting of minimalistic sounds and Latin and Mediterranean melodies. As a record producer, D'Agostino's uses the pseudonym "Gigi Dag"; he transforms a piece, originally destined for the discos, into a success for the mainstream public.