Robert wald

Abraham wald and the missing bullet holes
Wald test
Abraham wald survivorship bias

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President Abraham Lincoln's receiving vault restored

Time had not been kind to the receiving vault that once held the bodies of President Abraham Lincoln and his 11-year-old son, Willie, who died at the White House. The remains of Lincoln and his son were placed in the vault at the base of a hill in Oak Ridge Cemetery in Springfield on May 4, 1865, following the Springfield funeral for the assassinated president. The pair and another son, Eddie, were moved on Dec. 21, 1865, to a temporary tomb, which is now the site of the Lincoln Tomb.

Water often penetrated the vault's flat roof, crumbling the bricks and masonry walls. Our team served as the lead structural engineer for restoration and worked with RATIO, the lead historic architecture firm on the project. The timeline was moved up five months to ensure construction would be done in May 2015 for the two-day ceremony commemorating the 150th anniversary of Lincoln's death.

Fehr Graham planned and designed drainage, waterproofing and exterior restoration of the vault. We also administered the work performed by the contractor wh

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Family vault of banker Abraham Camondo awaits repair in Istanbul

The family vault of Jewish Ottoman-Italian financier and philanthropist Abraham Salomon Camondo has been going to wrack and ruin right next to the D-100 Highway in the Hasköy quarter of Istanbul. While the vault, which draws attention with its design, is in disrepair, it is also being used as a shelter by the homeless and drug addicts.

Abraham Salomon Camondo, born in 1781, was one of the world's richest people in the 19th century. The banker, who financed the Crimean War and lent money to the Ottoman treasury, was also the founder of the Ottoman financial system.

The banker, who was a partner of Şirket-i Hayriye – a corporation for ferryboats that transported passengers and freight on the Bosporus from 1854 to 1945 – and Istanbul’s first tram company called Dersaadet, also commissioned the Camondo Stairs, which connects the Bankalar Caddesi (Banks Street) and Banker Street in Galata neighborhood. The body of Camondo, who died in Paris in 1873, was brought to Istanbul according to his will and buried i

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Abraham Wald

Hungarian mathematician

Abraham Wald (; Hungarian: Wald Ábrahám, Yiddish: אברהם וואַלד; (1902-10-31)31 October 1902 – (1950-12-13)13 December 1950) was a Jewish Hungarianmathematician who contributed to decision theory,^[1]geometry and econometrics, and founded the field of sequential analysis.^[2] One of his well-known statistical works was written during World War II on how to minimize the damage to bomber aircraft and took into account the survivorship bias in his calculations.^[3] He spent his research career at Columbia University. He was the grandson of Rabbi Moshe Shmuel Glasner.

Life and career

Wald was born on 31 October 1902 in Kolozsvár, Transylvania, in the Kingdom of Hungary. A religious Jew, he did not attend school on Saturdays, as was then required by the Hungarian school system, and so he was homeschooled by his parents until college.^[2] His parents were quite knowledgeable and competent as teachers.^[4]

In 1928, he graduated in mathematics from the King Ferdinand I University.^&