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Harald Sack

physics
The misjudged Math Teacher – Georg Simon Ohm

The misjudged Math Teacher – Georg Simon Ohm

Harald Sack
On July 6, 1854, the Bavarian physicist and mathematician Georg Simon Ohm passed away, he was best known for his research on electricity and it was him to initiate the subject of circuit theory. The SI unit of electrical resistance and Ohm’s law are named after this Bavarian ‘teacher’. “The design of this Memoir is to deduce strictly from a few principles, obtained chiefly by experiment, the rationale of those electrical phenomena which are produced…
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physics
Sir Isaac Newton and the famous Principia

Sir Isaac Newton and the famous Principia

Harald Sack
On July 5, 1687, Sir Isaac Newton published his Philosophiae Naturalis Principia Mathematica (in Latin). The Principia states Newton’s laws of motion, forming the foundation of classical mechanics; Newton’s law of universal gravitation; and a derivation of Kepler’s laws of planetary motion (which Kepler first obtained empirically).[6] It is to be considered as the most influential work of Isaac Newton and as one of the greatest scientific works of all time. “The ancients…
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astronomy
The Supernova of 1054

The Supernova of 1054

Harald Sack
On July 4, 1054, Chinese astronomers observed a new star in the constellation of Taurus, which later turned out to be a supernova. However, even before the Chinese, on 11 April 1054, a monk in Flanders noticed a “bright disc in the afternoon“. This was the first traditional observation of a supernova explosion. “First year of the Zhihe era, fifth lunar month, ji-chou day. A guest star has appeared to the south-east of…
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economics
Charles Dow and his Famous Stock Index

Charles Dow and his Famous Stock Index

Harald Sack
On July 3 1884 Charles Henry Dow together with his colleague Edward Jones composed and published an stock average – called the Dow Jones Railroad Average -, which contained nine railroads and two industrial companies. He developed the stock index as part of his market research and it was meant to serve as a reference value to determine fluctuations of the stock market. It first appeared in the Customer’s Afternoon Letter, a daily…
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history
“I shall be heard!” – The Case of the La Amistad

“I shall be heard!” – The Case of the La Amistad

Harald Sack
On July 2, 1839, Sengbe Pieh (later known as Joseph Cinqué) led 53 fellow Africans being transported as captives aboard the Spanish schooner ‘La Amistad‘ from Havana in a revolt against their captors. Breaking Free La Amistad, captained by Ferrer, left Havana on June 28, 1839, for the small port of Guanaja, near Puerto Principe, Cuba, with some general cargo and 53 slaves bound for the sugar plantation where they were to…
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computer science
Let Us Calculate – the Last Universal Academic Gottfried Wilhelm Leibniz

Let Us Calculate – the Last Universal Academic Gottfried Wilhelm Leibniz

Harald Sack
On July 1, 1646, one of the last universally interdisciplinary academics, active in the fields of mathematics, physics, history, politics, philosophy, and librarianship was born. Gottfried Wilhelm Leibniz counts as one of the most influential scientists of the late 17th and early 18th century and impersonates a meaningful representative of the Age of Enlightenment. Moreover, I even have a personal relationship with him since he is also the namesake of the association to…
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physics
The Annus Mirabilis in Physics – Albert Einstein and the Year 1905

The Annus Mirabilis in Physics – Albert Einstein and the Year 1905

Harald Sack
Have you ever heard of the “Annus Mirabilis” (in German “Wunderjahr“) of physics? 1905 was this Annus Mirabilis, this year of wonders or extraordinary year. History considers 1905 as the year with the most outstanding and influential papers ever published by famous physicist Albert Einstein in the   the Annalen der Physik scientific journal. These four articles contributed substantially to the foundation of modern physics and changed views on space, time, and matter.…
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philosophy
“Man was born free, and he is everywhere in chains” – Jean-Jacques Rousseau

“Man was born free, and he is everywhere in chains” – Jean-Jacques Rousseau

Harald Sack
Jean-Jacques Rousseau was born on June 28, 1712. The writer, philosopher, composer, and pioneer of the Age of Enlightenment had a great influence in educational and political matters throughout the French Revolution and beyond. “It is ordinary people who have to be educated, and their education alone can serve as a pattern for the education of their fellows. The others find their way alone.” — Jean-Jacques Rousseau, Emile, or On Education, 1762 Jean-Jacques Rousseau – Early…
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computer games
Have you played your Atari today?

Have you played your Atari today?

Harald Sack
On June 27, 1972, Nolan Bushnell and Ted Dabney founded a company named Atari Inc. that should become a pioneer in arcade computer games, video game consoles, and home computers. The year before in 1971, they had designed and built the world‘s very first arcade video game – Computer Space for Nutting Associates. Atari – An Etymology You might wonder, where the name of the company might come from. Actually, Bushnell wrote down several words…
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