Science | Fotoeins Fotografie

Posts from the ‘Science’ category

Aurora borealis, 49°N: 11 Oct 2024

Northern lights over New West

Notices quickly went out, even saw alerts from scientists whom I follow on social media. Big solar storm detected, big aurora display expected.

The colours: reds & blue-greens for oxygen & nitrogen, respectively.

Structure: pillars, curtains, wavy strands.

Location: New Westminster, BC 🇨🇦 ; 49.2° North, 122.9° West.

Time: from about 12am to 1am PDT (7 to 8h UTC), on 11 October 2024.

*Northwest horizon, 0003h PDT. Visible: Vega (Lyra), Draco, Ursa Minor.*

*East horizon, 0010h PDT. Visible: Jupiter, Aldebaran (Taurus), Pleiades, Cetus, Orion.*

*Northeast horizon, 0027h PDT. Visible:*

*East horizon (towards the Port Mann Bridge), 0030h PDT.*

I made all photos above with an iPhone15 on 11 Oct 2024. This post composed with Jetpack for iOS appears on Fotoeins Fotografie at fotoeins DOT com.

My Vienna: Ludwig Boltzmann was here

The name is a large presence, particularly to many in science.

To others, the name might have little significance as any other name, like Helmut Grossuhrmacher. OK, I made that name up.

A name I didn’t make up is Ludwig Boltzmann, whose contributions to science are fundamental in an understanding of heat- or thermal-physics, thermodynamics, and statistical mechanics. After several years of undergraduate- and graduate-level physics, Boltzmann is one of many names imprinted into memory, firmly established in the left-side of my brain.

Boltzmann highlights

• b/✵ 20 February 1844 – d/✟ 5 September 1906.
• Born and raised in Vienna, Boltzmann enroled at age 19 in the University of Vienna to study mathematics and physics.
• Supervised by Josef Stefan, Boltzmann completed his doctoral dissertation “Über die mechanische Bedeutung des zweiten Hauptsatzes der mechanischen Wärmetheorie” (On the mechanical significance of the 2nd Law of Thermodynamics) in 1866 at the age of 22.
• 1869–1873: University of Graz, with visits to Heidelberg and Berlin.
• 1873–1876: University of Vienna.
• 1876–1890: University of Graz.
• 1890–1894: (Ludwig Maximilian) University of Munich.
• 1894–1900: after Josef Stefan’s retirement, Boltzmann returns as professor of mathematics and physics at University of Vienna.
• 1900–1902: Leipzig University.
• 1902–1906: University of Vienna; he also teaches physics, mathematics, and philosophy.
• Doctoral students Boltzmann supervised and advised included: Paul Ehrenfest, Lise Meitner, Stefan Meyer, Walther Nernst.
• Speaking tour of the United States in 1905, including his stay that summer in Berkeley at the University of California. Evident from his trip report, Reise eines deutschen Professors ins Eldorado, is his sense of humour.

Time has been kind to Vienna, a city filled with notable personalities in arts, architecture, music, and science. Throughout its cemeteries, the city has assigned “graves of honour” (Ehrengrab) for many, including Boltzmann. Finding his final spot was one of many favourite moments in 2018. However, Boltzmann’s significance to the University of Vienna, to the physics world, and to time I spent in physics persuaded me to create a short (walking-)tour of Vienna to highlight some of his traces and memorialization in the city.

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My Berlin: Minkowski space in Heerstrasse cemetery

Waldfriedhof Heerstrasse (Heerstrasse forest cemetery)

Is this a small park with plenty of trees, hilly terrain, and a small lake? Or is this simply a forest cemetery, a final resting spot for many prominent Berliners?

As part of an ongoing search for gravesites for physicists and mathematicians in Germany, I visited Berlin’s Friedhof Heerstrasse, near the city’s Olympic Stadium. Within the cemetery is Sausuhlensee lake, which settled into a former glacial gully, around which much of the cemetery came into being in 1924. Named after the early 20th-century Heerstrasse estate district whose residents were to be buried here, the cemetery stretches out over an area of almost 15 hectares (37 acres).

I found the grave for physicist Hermann Minkowski, but among the buried there are other “Promis” (prominent).

Friedhof Heerstrasse, Westend, Berlin, Germany, Deutschland, fotoeins.com

Forested park, forest cemetery.

The calm waters of Sausuhlensee lake on an autumn afternoon.

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Vienna: 9 spots in the 9th district

Above/featured: Votivkirche (Votive church) from Schottentor – 20 May 2023.

Two visits: two months spread over two years.
A thousand kilometres of walking.
Hundreds of historical spots and locations tracked, spotted, and photographed.

It makes sense that out of Vienna’s 23 city districts, I’ll frequent some more than others. The 1st district, or the Innere Stadt, is unavoidable, because that’s where most visitors to the city will congregate. The 2nd (Leopoldstadt) and the 6th (Mariahilf) are districts where I had separate month-long stays. But it’s the 9th district (Alsergrund) into which I wandered through countless times, including tracking my way to the 18th and 19th districts.

Out of many interesting little spots in Alsergrund, I’ve highlighted nine examples from a historical “mélange” of architecture, Jewish culture, medicine, music, and physics. If you’re wondering about the Votivkirche (Votive Church) in the image above, I’ll have more about the church in future posts about Ringstrasse (Ring Road) architecture as well as the architectural works by Heinrich Ferstel.

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Vienna: Dr. Olga Ehrenhaft-Steindler, trailblazer & women’s advocate

In examining the history of the University of Vienna, I discovered Olga Ehrenhaft-Steindler was the first woman to receive a doctoral degree in physics from the university in 1903. Who was she? How did she become the first? How did society of the time view the education of young women?

I’m starting a series on women who left their mark on Vienna and Austria, and some of the traces they left behind in the Austrian capital city. With educators, inventors, writers, and scientists, my serial includes: Dr. Marietta Blau; Marianne Hainisch; Hedwig Kiesler, a.k.a. Hedy Lamarr; Dr. Lise Meitner; Dr. Gabriele Possanner; Dr. Elise Richter; and Bertha von Suttner.

Who: Dr. Olga Ehrenhaft-Steindler: b/✵ 28 Oct 1879, d/✟ 21 Dec 1933.
PhD: 1st woman with doctoral degree in physics from University of Vienna, 1903.
Educator: Early 20th-century teacher & advocate for better access to education for young women.

In late 19th-century and early 20th-century Austria and Vienna, Olga Steindler was one of countless women who faced difficulties and challenges by young women who wanted to expand their education and improve employment, all of which were viewed by society at the time as undesirable. Feminism or anything similar did not exist.

Born and raised in Vienna, Olga Steindler departed her home for Prague to complete and pass her final high-school examinations in 1899, because young women were not permitted to do so within Austria at the time. She subsequently enrolled at the University of Vienna to study physics and mathematics within the Faculty of Philosophy. Only two years earlier in 1897 had the University of Vienna finally accepted the enrolment of women, although they were initially allowed only into the Faculty of Philosophy. In 1903, Steindler became the first woman to receive a Ph.D. in physics from the University of Vienna after successfully completing her research dissertation.

Completing qualifications for teaching at secondary (high) schools in the same year, she joined the “Athenäum” where she taught young women about experimental physics; she also taught at Vienna’s first girls’ secondary school established by Marianne Hainisch in the city’s 1st district. In 1907, she founded two new schools in Vienna: a girls’ public secondary school in the city’s 2nd district, and a business school for young women in the city’s 8th district. Steindler married her physicist colleague Dr. Felix Ehrenhaft in 1908; she became known as Dr. Olga Ehrenhaft-Steindler. She championed the cause for educating girls and young women, and creating new opportunities in science, business, and society at large. For her dedicated service to the public, Austria awarded her in 1931 the title of “Hofrat” as a new member of the imperial court advisory council, an honour uncommon among Austrian women at the time. At the age of 54, Dr. Olga Ehrenhaft-Steindler died in December 1933 from complications after having contracted pneumonia.

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