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Roberta Peters

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Peters in 1974 Roberta Peters (May 4, 1930 – January 18, 2017) was an American coloratura soprano. One of the most prominent American singers to achieve lasting fame and success in opera, Peters is noted for her 35-year association with the Metropolitan Opera Company in New York, among the longest such associations between a singer and a company in opera. [1] She was awarded the National Medal of Arts in 1998. [2] Contents 1 Early life and career 2 Personal life 3 Discography 3.1 Studio opera recordings 3.2 Studio recital recordings 3.3 Live Metropolitan Opera broadcasts released on CD by Sony 4 Further reading 5 References 6 External links Early life and career Peters was born Roberta Peterman in The Bronx, New York City, the only child of Ruth (née Hersch), a milliner, and Solomon Peterman, [3] [4] a shoe salesman. Her family was Jewish. [5] Encouraged by tenor Jan Peerce, she started her music studies at age 13 with Wi...

Dorothy Kirsten

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Dorothy Kirsten with Bing Crosby Dorothy Kirsten (July 6, 1910, Montclair, New Jersey – November 18, 1992, Los Angeles, California) [1] was an American operatic soprano. Biography Kirsten's mother was an organist and music teacher, her grandfather was a conductor, and her great-aunt, Catherine Hayes, was also an opera singer. She left high school at age 16 and worked for the Singer Corporation sewing machine company and for New Jersey Bell, studying voice in her spare time. Her teacher, Louis Darnay, eventually employed her as a secretary and maid. [2] By the late 1930s she had an ongoing professional career as a radio singer on WINS, a member of the Kate Smith Chorus, and as a vocalist for pop orchestras. She mentored under Grace Moore from 1938, who had her study in Rome with Astolfo Pescia. Her time in Europe was cut short by the outbreak of World War II, and she returned in 1939, debuting at the New York World's Fair. [2] Roles followed at the Chicago Opera ...

How can I improve my looping Python script, involving different mathematical operations for different...

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up vote 0 down vote favorite I am posting again as I had no luck trying to make the following script more efficient. For more details, do check out my previous post, but the basic situation is as below. I have written a script in order to compute a score, as well as a frequency for a list of genetic profiles. A genetic profile here consists of a combination of SNPs. Each SNP has two alleles. Hence, the input file for 3 SNPs is something like below, which shows all possible combinations of all alleles for all three SNPs. This table was generated using itertool's product in another script: AA CC TT AT CC TT TT CC TT AA CG TT AT CG TT TT CG TT AA GG TT AT GG TT TT GG TT AA CC TA AT CC TA TT CC TA AA CG TA A...