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Labour Day Berlin 2025

In 2025 Labour Day Parade in Berlin started again on Karl-Marx-Allee to the destination at the “Rotes Rathaus”, the red brick City Hall of Berlin. The slogan: “Mach dich stark mit uns” (engl. empower yourself with us) refers to the building up of force by members of the trade union movement in growing bigger again. Solidarity in crisis is currently tested again in each collective bargaining and negotiations at the local, sectoral, regional, national and European level. However, on the 1st of May the parade obviously has the political part with the speeches, but also the family party atmosphere towards the end at the Neptun fountain at Alexanderplatz. Large crowds come out in Berlin and the organizers of the DGB and the police do a great job to ensure a safe and enjoyable demonstration in the heart of Berlin. More impressions on the mobilizing event here. Images from Berlin Labour Day 2025.

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Robot assistant

Adjustment processes on the labour market take their time. This means that care workers are in short supply in most countries of the OECD. Engineers as well. There are so many robots, care robots I mean, still to develop that the shortage of engineers give little hope that we shall have affordable solutions in this area for the next few years. The issue is mainly about integrating and enhancing already existing solutions. If you are a mechanical engineer you can put together motorised mechanical pieces, small motorised electric devices and, for example, small infrared emitting and receiving devises.
All this is child’s play these days (see image below). The assembling of a small Robot assistant that follows movements or can escape from a small labyrinth makes such simple structures transparent for learners and users. There is nothing magical about it, just adding together small pieces and the electronic devices to steer the movements. The learning tool from KOSMOS has been on the market for 5 years. It is a helpful device to explain basics through hands-on experience. The limits of robotics equally become more evident. Our own health and safety is concerned with larger devices cohabiting with us. A robot assistant can take on easy tasks like to follow me through my living space in old age carrying a mobile phone, keys or an emergency device. More sophisticated tasks need more sensors and AI to train the most needed and best routines. For many years this needs our input and our control as well as supervision of such devices. Most robots will operate as assistants with us in the driving seat or the boss.
This is yet another element of the “all electric society“. We are moving towards the use of more electronics assisting us from year to year.

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Archi health

The links between architecture and human health are manifold. There are direct effects of healthy versus unhealthy materials in construction. For the purpose of making buildings fire proof or more resistant to heat asbestos had been used for decades which still causes health hazards nowadays in the removal of this cancerous material. Paint has to be chosen wisely as well as isolation materials. Indirect or second round effects of materials have to be considered additionally. Cement in construction uses a lot of energy in its production and has only been recycled since a few years in significant amounts. Room climate or even psychological effects of architecture have been considered to be important more seriously in recent years. A new discipline entitled “neuro-architecture” may be developed soon. Schools, sports facilities, hospitals or community centers benefit from healthy architecture. Cost benefit analyses which take into account long term effects and even recycling of materials shift the balance much in favor of health considerations also in architecture. “Fast and dirty” will be much more expensive than “slow and healthy”. Future generations will be thankful. (Image: Spreewald Primary school Berlin).

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Dysprosium 66

Dysprosium figures as Nr. 66 in the periodic table (short: Dy). This metal was given this Greek name, which translates to “hard to get”. Although more common than gold on earth, Dysprosium is part of the so-called rare earths on earth. Since it is very temperature resistant before becoming fluid and at the same time having good isolation properties, for example against radiation in combination with lead, the nuclear energy industry has a definite use case.
Additionally, wind turbines, electric vehicles and some smart phones use these characteristics of the metal only known to us since the late 19th century.
The major exploitation happens in China and, therefore, the recent tariffs have complicated the trading. Prices tend to rise and products that contain Dysprosium are likely to become more expensive. However, there is the other side of the coin, which means recycling and reuse of Dysprosium is also more interesting to companies. Hence, the price increase will likely enhance circularity of the metal from obsolete products into newer ones. In this respect it is good news that smartphones receive longer updates of their operating systems and security as of 2025-6-20 in the EU. This will also reduce the amount of rare earths needed in the production of the rapidly changing technical specifications of smart phones and tablets. Repairing the devices makes more economic sense before “programmed” obsolescence.
(Image: extract from Willem van der Vliet (attributed), The money counter. early 17th century, Brussels MRBAB).

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Archi Octagon

The architecture we see around us has lots of interesting mathematical features. Some are the basis for more complicated calculations. The octagon shape is not that common, but with some formulas the calculations become easier and construction in the real world is more feasible. Well worth to dig a bit deeper into this shape. The geometry of angles and circumference follows rules that have been laid out a long time ago. The webpages explaining this are manifold and it is a project of its own kind to compare them and recommend the best ones. My current favorite is: mathmonks. A reasonable choice is in most cases also wikipedia, the long running amazing knowledge project also for the octagon.

Image: Berlin Europa Center 2025.

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Archi Geometry

Architecture has an obvious and visible link with geometry. Clear lines, rectangular or triangular shapes have dominated for centuries since the Greek temples. Geometry was a discipline that has attracted many scholars and particularly architects. Nowadays the shapes are much more diversified and sometimes complex. The calculation of surfaces, curved lines and shapes have become an issue of more complicated mathematics. Volumes of irregular shapes are a challenge for most people to calculate and heating or cooling sich buildings adds considerable complexity. It is, however, rather relaxing and fascinating to look at the marvels of modern shapes in architecture. Technology and material science have allowed us spectacular progress and designs in recent years. Paris offers a splendid perspective on such developments. 

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Health Systems

Comparing health systems across the EU can be complex at times. However, there seems to be a consensus that the Irish health system is an oddity within the European health systems. On the one hand Ireland is a rather wealthy country in terms of GDP, but the primary care system excludes a high percentage of people from access to it. The scientific journal “The Lancet Regional Health” published a paper and comment on this rather unique exception to the rule to offer a universal health care system to its citizens. The controversy is about the coverage of costs of a visit to a general practitioner. More and probably earlier visits to a GP reduce the (over)burdening of
hospitals later during the life course. Prevention helps a great deal to lower overall costs of a health system.
The roots of the Irish health system have been built upon “subsidiarity”, which means that the public support system should only step in, if the individuals or families are unable to cover costs by themselves. Poor households had to apply for a card giving them access to medical care free of charge. Building hospitals was the next challenge and local communities managed to raise funds in support of such additional structures. In 2025 it can be very costly to enlarge the coverage to a universal access to primary care and the challenge to attract sufficient numbers of general practitioners is a very European one. In this respect Ireland is just like any other European country again.
The question of how to best achieve a universal health care system remains an important one. Apparently, you can be rather “health poor” in an otherwise “economically rich” country.

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Marx Home

The home of an influential philosopher, economist and political scientist is not easily presented like a home of a musician, a composer or an author. However, the home of Karl Marx in Trier on the Moselle river succeeds to present the biographical links of growing up in a historic city, the bourgeois upbringing of the young Marx and his formation as an independent and even revolutionary thinker of the economy and society. In 2025 the home is a museum supported by the Friedrich Ebert Foudation with a great online guide and access to additional scientific material. For authors like Karl Marx it is always of interest to follow not only the origin and evolution of the thought process, but also the shifts in the reception of his writings by subsequent generations. This part of the exhibition and an audio guide (downloadable as App).

In 2025 with an apparently ruthless capitalism at work in the biggest economy of the globe, the reminder that the economy is best to be understood as a political economy, which focuses on self-interest and profitable business deals, we find in Karl Marx still a worthwhile reminder of economic development even in the 21st century. The note-taking and studies in Exile in London are well documented in the tiny home and museum. Studying the misery of exploitation in supply chains and international commerce remains a topic of continuing interest as well. 

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Liszt home

In Budapest we can visit one of the longer living places of Franz Liszt or Ferenc Liszt as some Hungarians would insist to call him. The Beethoven trained Carl Czerny offered piano and music classes free of charge to the young Franz Liszt in Vienna at the age of 11. In the biography by Klára Hamburger she describes the Paris years of Liszt from 1823 until 1839 as the most important ones for the pianist and particularly for his later compositions. Born in Hungary, the son of 2 Austrian parents he was trained in Paris by amongst others the Czech professor of the Conservatoire de Paris Antonin Reicha just like Chopin, Flotow or Offenbach. Writing an opera was the “must do” for a composer who aimed for the highest possible career at the time. In a letter to George Sand, Liszt (published 1937) complained already about the social status of musicians in society as servants to the higher ranks of society. Similar to Ravel many years later Liszt was rejected as official scholar by the Conservatoire de Musique and his wish to marry a daughter of noble decent was rejected early in his career. Such experiences probably contributed to his leaning towards the romantic form of expressions in music during most of his compositions. Literature, paintings of the French romantic period and the traveling artist “voyages et pèlerinages” became influential in his creative process. The competition between composers must have been fierce at the time and despite ample opportunities to perform in public and private venues making a living from music wasn’t always easy at the beginning. More than 100 years after his death his compositions are still a challenge for all pianists and the Hungarian Rhapsodies probably his greatest homage to his early childhood.

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Tchaikovsky home

During the time before the “Zeitenwende” it was easy to visit the home of the composer Pyotr Ilyich Tchaikovsky in St. Petersburg. Therefore, we refer to our memory of the visit and the already 10 years ago restrained liking and appreciation of the Russian officials for the aristocratic composer, even accused to not be sufficiently Russian in his music compared other Russian composers. The composer had diverse love affairs, which were also not conform to official doctrines. The world wide success of his compositions, mostly known for his ballet music, remains popular in the 21st century. Similar to Beethoven, the biography by Malte Korff (Tschaikowsky, in German), highlights the final symphony as his masterpiece. The seems to be a reason to study “the last works” of composers specifically. The mature compositions appear to reflect on previous work and build or comment on previous work. The 6. symphony “Pathétique” was completed in his last year of his life, only at age 53. The final IV-th piece of it is entitled “Adagio lamentoso” and ends in very calm tempo and almost silence like a withering away heart beat. To my surprise I found a similarly very quiet ending in one of his early piano composition when he was only 28 years old “Romance Opus 5, Andante cantabile”. This early piece also ended “più lento” and from pp to ppp. (compare extract of image of notes below).