Science | Fotoeins Fotografie

Posts from the ‘Science’ category

24T40 University of Vienna & her physicists

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Established in 1365 as one of the oldest universities in Europe, the University of Vienna has been home to her share of remarkable people in teaching and research. A first love is physics; so I go willingly into that space, to look for a number of physicists at Uni.Wien.

*Main building of the university (Hauptgebäude), built by Heinrich Ferstel on the Ringstrasse; inaugurated 1884.*

*Erwin Schrödinger, atomic & nuclear physics; awarded 1933 Nobel Prize in physics.*

*Viktor Franz Hess, for his work on atmospheric cosmic rays, awarded 1936 Nobel Prize in physics.*

*Arkadenhof (arcade courtyard), where prominent university staff and faculty are highlighted as plaques and busts.*

*Left: Christian Doppler, physics professor 1860-1863. Right: Erwin Schrödinger, and his famous equation for quantum mechanics*.

*Johannes and Karl Littrow: Littrow, as in Littrow configuration in optics.*

*Franz Exner, physics professor (1891-1920) and whose PhD students included: Stefan Meyer, Lise Meitner, Felix Ehrenhaft.*

*Josef Stefan, of the Stefan-Boltzmann Law; physics professor from 1863 to 1893.*

*Ludwig Boltzmann, of the Stefan-Boltzmann Law; physics and maths professor.*

*Lise Meitner, atomic & nuclear physics, who should have had a share in the 1944 Nobel Prize in Chemistry*.

*Berta Karlik, atomic & nuclear physics; in 1956 Karlik the first woman to receive full professor from the University of Vienna.*

I made all images above with an iPhone15 on 16 Jun 2024. I received neither sponsor nor support from any organization. This post composed with Jetpack for iOS appears on Fotoeins Fotografie at fotoeins DOT com.

24T06 Heidelberg: Church of the Holy Falcons

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The Church of the Holy Spirit stands tall over Heidelberg’s Market Square. But up top its central steeple is an annual springtime renewal: a new family of falcons.

For a number of years, volunteers have managed the “nest box” in the steeple above the clock face, and run the Wanderfalken website. A couple of falcons pair up, mum lays eggs in the cozy church box on high, and parents raise the chicks over a timescale of weeks: until the chicks “disappear” in flight. All of this is in view of everyone who has Internet access.

The nest’s entrance faces “out” to the east, as seen in “Webcam 1” with Heidelberg’s Karlsplatz and Kornmarkt visible. Webcam 2 faces “in” to the “back” of the box, and Webcam 3 from the outside faces west to the roost next to the entrance.

*Church of the Holy Spirit, facing west from Marktplatz (Market Square): 1x digital zoom.*

*Falcon nest in the square “hole” above the clock face. In shadow to afternoon light, the presence of a falcon on the perch is barely discernible in this 10x digital zoom. At 1535h, on 13 May 2024.*

*Perched is a winged guardian out front, from the live stream.*

*Two sleeping chicks, from another live-stream camera.*

*Two chicks awake 35 minutes later and grooming themselves.*

I made the first two images above with an iPhone15 on 13 May 2024, plus remaining same-day screen captures from webcams on the Wanderfalken website. 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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