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Wels Steak and Grill in Austria
During our trip to Croatia last summer we were traveling from Regensburg to Maribor and had to find a place to charge and have lunch. We passed Wells and looked for a place to charge. It turned out there were some free charging stations next to a shopping mall and and a movie theatre. At the move theatre there was also a restaurant, the Wells Steak and Grill. Because of the doubtful weather the terrace in front was closed and we had to sit inside. In terms of interior decoration it was nothing special as can be expected but we…
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Joan as Police Woman in Leuven 2025 Concert Review: A Night to Remember
On November 24 2025 Joan as Police Woman played a concert in 30cc in Leuven. I saw her play in Leuven long ago in the period that she had released Real Live and To Survive, 2 albums I have at home and really like. I hadn’t followed newer albums so I didn’t know what to expect. But even if I had been in touch with her more recent albums I doubt it would have prepared me for her performance. Joan played keyboards and piano and a bit of guitar and was on stage with only a drummer and a guitarist.…
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Premier Inn City Center Hotel and restaurant Meridiano Regensburg
During our summer vacation we went to Croatia. On our way to Croatia we made a first stop to sleep at the Premier Inn in Regensburg. It is called the City Center Hotel but the neighbourhood looked more like some kind of business district with very little activity when we arrived. That probably explained the low rate we had to pay for the 2 rooms which were modern and clean. Breakfast in the morning was good and the hotel has an underground parking garage with number plate recognition. If you don’t mind not being in the city centre this hotel…
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Evariste Galois. 1811-1832, Laura Toti Rigatelli (ISBN 978-3-7643-5410-7, Birkhäuser)
I found this biography of Evariste Galois after reading about him in Eric Temple Bell’s Men of Mathematics. It is part of the Vita Mathematica series of the publisher with biographies of mathematicians, most of them published in German. The author is an Italian professor in mathematics with a special interest in the history of algebra. Galois made ground breaking contributions to algebra and his short life was mostly lived in the turbulent years after the defeat and exile of Napoleon. France was split between the royalists and supporters of the ideals of the Revolution. Galois’ father had been a…
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Richard Feynman. A Life in Science, John Gribbin and Mary Gribbin (ISBN 978-1-78578-372-2, Iconbooks)
During my physics studies at university I became a fan of Feynman. His path integral formulation of quantum mechanics was a revelation after years of plodding through the standard formalisms by Heisenberg and Schrödinger and the mists surrounding the question what it all meant physically. Especially the fact that this approach was also applicable to classical physics was, I say it again, a revelation. But I didn’t know much about Feynman as a human being. That changed when I read the biography from James Gleick. in the middle of the nineties. That biography is lengthier and more detailed in the…
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Exercised. Why something we never evolved to do is healthy and rewarding, Daniel E. Lieberman (ISBN 978-0-525-43478-8, Vintage Books)
I heard about this book in a podcast about running. 2 journalists discussed their own running habits and struggles and one of them mentioned this book as a good one to read. I definitely found it interesting as it gives insights from an evolutionary perspective to why so many people struggle to exercise even though everyone knows it is good for your health and quality of life. The author is a paleoanthropologist and professor of human evolutionary biology at Harvard University. The book is well written and researched with many references to research papers. I learned a lot about human…
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Bombelli’s formula to calculate the square root of 2
We owe following formula to Bombelli, approximately 1572 :
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Some strange formulas containing pi
A couple of series to calculate pi, first one is from Leibniz
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pi approximations
Some approximations for pi :
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My Journey to 500K: Running Challenges and Consistency
Ever since I started running again in 2020 during the Covid shut down I have been struggling to keep the momentum going over the year. I had set my yearly target in Strava at 500k but there always seemed to be something to make me ‘stumble’ and stop running for a while. So last year I set myself a target to run 55 times in the timespan of a year (birthday to birthday) to introduce some consistency in my running frequency. I did reach that target but without running 500k in that timespan. So for the next year I set…
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