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Harald Sack

computer science
Seymour Cray – the Father of Supercomputing

Seymour Cray – the Father of Supercomputing

Harald Sack
On September 28, 1925, American electrical engineer and supercomputer architect Seymour Roger Cray was born. He designed a series of computers that were the fastest in the world for decades, and founded Cray Research which built many of these machines. Called “the father of supercomputing,” Cray has been credited with creating the supercomputer industry. “One of my guiding principles is don’t do anything that other people are doing. Always do something a little…
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medical science
Ivan Pavlov and the Conditional Reflex

Ivan Pavlov and the Conditional Reflex

Harald Sack
On September 27, 1849, Russian physiologist and Nobel Laureate Ivan Petrovich Pavlov was born. He is primarily known primarily for his work in classical conditioning. And what is the first thing you will think about when you hear Pavlov‘s name? Well, probably his experiments with dogs, where he conditioned dogs to salivate when hearing a bell ringing because they expected to get food. But, let’s take a closer look at Pavlov and…
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chemistry
Joseph Proust and the Law of Constant Composition

Joseph Proust and the Law of Constant Composition

Harald Sack
On September 26, 1754, French chemist Joseph Louis Proust was born. He was best known for his discovery of the law of constant composition in 1799, stating that in chemical reactions matter is neither created nor destroyed. A Young Chemist Joseph L. Proust was born on September 26, 1754 in Angers, France as the second son of Joseph Proust, an apothecary, and Rosalie Sartre. Joseph studied chemistry in his father’s shop and later came to…
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mathematics
William Friedman and the Art of Cryptology

William Friedman and the Art of Cryptology

Harald Sack
On September 24, 1894, US cryptologist William F. Friedman was born. He is considered one of the world’s greatest cryptologists, who helped decipher enemy codes from World War I to World War II. William Friedman – Early Years Friedman was born as Wolfe Frederick Friedman, then part of imperial Russia, now Chisinau, capital of Moldova, as the son of Frederick Friedman, a Jew from Bucharest who worked as a translator and linguist for the Russian Postal Service,…
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physics
Hippolyte Fizeau and the Speed of Light

Hippolyte Fizeau and the Speed of Light

Harald Sack
On September 23, 1819, French physicist Armand Hippolyte Louis Fizeau was born. He is well known for his calculation of the speed of light and his suggestion to use length of a light wave be used as a length standard.[4] Hippolyte Fizeau – Early Years Hippolyte Fizeau was born in Paris as the eldest son of Béatrice and Louis Fizeau, who was professor of Pathology at the Paris Medical School. He attended the prestigious…
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mathematics
William Playfair and the Beginnings of Infographics

William Playfair and the Beginnings of Infographics

Harald Sack
On September 22, 1759, Scottish engineer and political economist William Playfair was born. He is generally considered the founder of graphical methods of statistics. William Playfair invented four types of diagrams: line graph, bar chart, pie chart, and circle graph. William Playfair Playfair was born in 1759 in Scotland during the Enlightenment, a Golden Age in the arts, sciences, industry and commerce. He was the fourth son of the reverend James Playfair…
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physics
James Dewar and the Liquefaction of Gases

James Dewar and the Liquefaction of Gases

Harald Sack
On September 1842, Scottish chemist and physicist Sir James Dewar was born. He is probably best-known today for his invention of the Dewar flask, which he used in conjunction with extensive research into the liquefaction of gases. James Dewar Background James Dewar was born in Kincardine, Fife, Scotland, in 1842, the youngest of six boys. He lost his parents at the age of 15. He was educated at Dollar Academy and the…
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cinematography
The Great Illusion by Jean Renoir

The Great Illusion by Jean Renoir

Harald Sack
On September 15, 1894, French film director, screenwriter, actor, producer and author Jean Renoir was born. As a film director and actor, he made more than forty films from the silent era to the end of the 1960s. Jean Renoir, as a representative of the Poetic Realism of the 1930s, created important film classics such as La Grande Illusion (1937) and The Rules of the Game (1939). “To the question, ‘Is the cinema…
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mathematics
Marin Mersenne – Mathematics and Universal Harmony

Marin Mersenne – Mathematics and Universal Harmony

Harald Sack
On September 8, 1588, French polymath Marin Mersenne was born. He is perhaps best known today among mathematicians for Mersenne prime numbers. He also developed Mersenne’s laws, which describe the harmonics of a vibrating string. “Philosophy would long ago have reached a high level if our predecessors and fathers had put this into practice; and we would not waste time on the primary difficulties, which appear now as severe as in the…
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chemistry
John Dalton and the Origins of the Atomic Theory

John Dalton and the Origins of the Atomic Theory

Harald Sack
On September 6, 1766, English chemist, meteorologist and physicist John Dalton was born. He is best known for his pioneering work in the development of modern atomic theory, and his research into colour blindness. He also recognised that the aurora borealis was an electrical phenomenon. “Philosophers are generally persuaded, that the sensations of heat and cold are occasioned by the presence or absence, in degree, of certain principle or quality denominated fire or…
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