Obviously, water is not just an issue of quantity, but also quality. The availability of sufficient quantities of water in a region depends on rain, its storage, and the use of these water resources. The quality of water is a subsidiary issue, as lack of inflow causes concentrations of nuisance in water to rise. Global warming will most likely intensity the concern for not only the quantity, but also the quality of water.
Public services are in charge to sample and monitor levels of water quality for consumers. Independent of public, private or public private partnerships in this field there is a need to check from time to time the quality of water. Public institutions do a great job in monitoring water quality, but as science progresses there are new sources of pollution that enter the already complex analysis of water quality. New chemicals and remains of medical or pharmaceutical analyses have been retrieved from water and, sometimes, they have reached critical or unhealthy levels.
More detailed monitoring is necessary and new digital tools allow to improve just this type of monitoring to inform policy makers on shifting patterns.
A project of that type “Urban Green Eye”, for example, allows to monitor the artificialization of previous vegetation to show up on satellite images of Germany. Independent groups, citizens or communities might find it useful to use their own sampling and testing to guard against abuses or dysfunctional public monitoring systems. Start-ups like “Hydroguard” offer services to support activists, communities or public services in their own efforts to ensure water quality. 
Water as a Service
Most of us are happy to turn on the water tap and enjoy the bubbles of fresh water. In other parts of the world this is considered a luxury and precious good. Public infrastructure takes care of water supply and treats waste water. We hardly even notice. This is changing in many regions of Europe now and Berlin and its surroundings are a good example of the challenges of water as a service. We need to sharpen our awareness that, yes, climate change again, has changed the priorities of water supply. Some East German regions face already a water supply shortage due to lack of rain water and adequate measures to store rather than evacuate rain fall. The German weather service (DWD) offers not only the info on rain fall, but also several indicators on soil humidity from 10cm to 200cm under the surface.
These measures are important for crops and agriculture, but also for trees and vegetation in general. The droughts of the last years show a lack of humidity in large parts of East Germany.
This is the starting point for the “citizen science” project in the region of Brandenburg. The “Wassermeisterei” brings together people interested in water management to monitor soil humidity with a shared infrastructure and citizen enthusiasts to raise awareness and draw conclusions on the local preconditions for agriculture and forestry. Knowing about the evolution of water availability over time allows to make more informed judgements about the need and potential of a continuous and improved “water as a service”. The presentation of the project on the e-government fair was a reminder to take water more seriously and to value this crucial resource with more respect. 
Start-up Winner
The SCCON 2024 has awarded one of its prizes for start-ups to „neuraflow“, which proposes the programming of chatbots for small communities or cities among other AI-applications. The test in multiple languages for the city of Bremerhaven is fun to test and shows that online public services can be witty and fun to use. The incorporation of local dialects gives the impression of a very personalized service. Moving the administration closer to the heart and the location of its citizens is achievable through shifting communication online. Prior information before a first contact speeds up information and administrative processes for everyone involved. Congratulations to the team involved and we look forward to many nice applications of the same technology in other cities. Admin can be fun, even in Germany 😉😂
Forced Living Space
The „Topography of Terror“ hosted the book launch of the research project on „Zwangsräume“ (forced living space or forced homes). The cooperation of an impressive network of organizations (Aktives Museum Faschismus und Widerstand in Berlin e.V., Koordinierungsstelle Stolpersteine Berlin, Alfred Landecker Foundation, Metropol Verlag) has achieved to uncover the forced relocations of thousands of German jewish people from rented place to another one, thereby regrouping and cramping Jews into ever smaller living spaces in predetermined houses within Berlin. Through this horrible step by step expropriation and extermination terror was present and visible all over Berlin. The online documentation and data access allowed citizen science projects to accompany the research and actively contribute to enlarge the data investigated, analysis and dissemination of the findings. The continuation and extension of the project is already in preparation and seeks additional funding and volunteers. The traditional book publication helps to provide an insight into the thorough historical research which started with a more adequate definition „Zwangsräume“ than the previously used term of so-called „Judenhäuser“, since the houses had and kept a mixed population sharing the living spaces until deportations of the jewish persons forced into ever smaller living spaces before. The property of the deported persons was recovered by officials from sealed apartments and sold mostly as bargains on auctions or just redistributed among officials in need or with special merit for the Nazi-movement. This adds an intergenerational dimension to the project that is also worth looking into in the next phase of this extremely valuable project based on large online archives from original register information and other documents. (Image: The map shown below in the presentation has blue signs that have already been traced and hundreds of red signs where the histories are not yet retrieved).
Nazi SS Terror
The permanent exhibition „Topography of Terror“ in the middle of Berlin is always a place that receives a lot of attention from tourists. This is great news. The central location is certainly part of the success story. The Brandenburg Gate and the boulevard„Unter den Linden“ nearby allow to combine historic interests and site seeing. Many groups from schools gain a visual impression of the terrorism the Nazi dictatorship and its para-military organizations have exercised during the years 1933-1945. The years after the 1st World war until the full dictatorship were crucial to attempt to stem the Nazi tide rolling across Germany from the original Munich-based headquarters. The information on the „Establishment of the Führer‘s Dictatorship“ (image below) is a warning to all of is today to guard against the beginnings of similarly extreme movements and parties today. We shall always remember and we shall never surrender.
Risk Takers
We are all risk takers of one form or the another. Those of us who ride motorbikes or enjoy rock climbing have an above average taste for risk taking. Since the publication of „The risk society“ we are aware that collectively as a society we have taken on additional risks like nuclear energy, atomic weapons or the risk associated with silent climate change with the persistent reliance on fossil fuels to a large extent. Holman W. Jenkins (WSJ) has added an additional perspective on risk takers which originates from government policies to encourage building homes in places subject to high risks of flooding. Several policies come to mind that encourage individuals to take high risks and construct and repair buildings in flood prone areas. Government grants, insurance policies and relocation subsidies are at issue here. Regulations like driving licenses try to build on competences to ensure „more rational risk taking“ in people. Teaching about nutrition might alleviate the obesity pandemic as much as awareness of an active lifestyle can avoid a large number of cardiovascular diseases. Risk taking should be to a large extent an individual’s choice with the consequence to live up to the consequences of the risks taken also more an individual’s responsibility. Collective solutions are a powerful way to encourage additional risk taking. The consequences of those well-defined solutions have to be funded collectively as well. A society-wide discussion and voting process on such issues has to be organized and updated from time to time. (Image Skateboard high and long jumps Brussels 2024-10)
Ranking Enterprises
The Spanish economic newspaper has published on its front page an updated ranking of the top 10 Spanish companies using environmental, social and governance (ESG) criteria (see below). elEconomista.es on 2024-10-12 shows through this updated ranking that ESG criteria continue to be relevant information for investors. It is not just a nice to have information but gives important information on the sustainability record of a company. Continuous monitoring is key to show and reward the efforts and investments companies have made to improve sustainability. This information needs large distribution in order to keep up the awareness that there is more to a balance sheet than just turnover, profit margins, debts and investment. Churning of employees creates costs to society as a whole as well. Any early information on ESG indicators, therefore, allows a much broader assessment of the full impact of enterprises, 360 degrees and over time. Certainly a good example to follow up on.
Science Fraud
It is a big issue if publications in science in high reputation journals have managed to pass a rather lengthy and thorough peer review process and still contain evidence based on fraudulent data. The worst case scenario that based on this wrong evidence tests of useless drugs are performed on patients in hope of an honest concern for their health. In fact the financial rewards and even academic rewards have been achieved only through the successful publication of a bias introduced into the data and/or analyses of the data. The fraudulent researcher became subsequently Director of the institute of agingwhoch is part of the American National Institute of Health (NIH) and an academic reference in health sciences far beyond the USA. It is the merit of Charles Piller and his team to persist in challenging the treatment recommendations which were concerning Alzheimer and Parkinson diseases. The checks and balances in the academic research have failed and a serious reconsideration of the procedures should follow, not just business as usual. The reputation of scientific research is at stake beyond the natural sciences and medicine, although the normal way of proceeding is just to qualify such events as singularity and specific to a single discipline. Aging is also not just treated by one single discipline. Hence, there is a need to review the review process and publication practices. The Boeing airplane control failures were also indicating that reviews of technology are subject to high risks. Independent checks and control are hard to ensure in advanced subject matters, but sufficient time and resources have to be devoted to the process. (Image Repair Lab Deutsches Technikmuseum DTM2024).
AI Nobel
Artificial Intelligence has made it into the ranks of Nobel prizes in 2024. As AI is been talked about everywhere by now the Nobel Committee has deemed it expedient to award Hopfield and Hinton the Nobel Prize not in informatics, this does not exist (yet), but in physics. Neural networks focus on the links between bits of information rather than just the sheer number of data points mimics the functioning of our brains. The most remarkable statement by Hinton is probably the one of the also dangerous potential of this invention. He has already issued a disclaimer on the potential of AI in warfare or other ways to impinge on our human idea of freedoms. The discovery of the applications, good and bad, of these AI-based systems has just begun. The comparison with Nobel‘s original discovery and mass production of explosives from which the prize draws its name has hardly been more adequate recently. (Image stockholm City Library)
Smart Cars
Technology of cars and in cars has evolved rapidly with the move towards the smart cars. Smart cars are characterized by many additional sensors, almost permanent connectivity to the producer’s software platform, the internet, autonomous driving capability or, potentially, remote control. We might still curse some nostalgic feelings of being in driving seat, but the supervision of our capability to drive and monitoring of behavior has reached impressive levels of perfection beyond the fasten your seatbelt sign and alarm. The software that is driving our cars has become the challenge of the coming years and with this the concern for data privacy and cyber security. Smart cars have multiple cameras to guide driving and parking effectively. These cameras are also a perfect spy even around or in your home. From our smartphones we all know the scanning of connectable Bluetooth devices or wlan nearby. Smart cars are powerful assistants in data collection sometimes even beyond your control, for example who these data are sent to. June Yoon (2024-10-2 Financial Times) has developed this rationale even further to stir up additional fears: “A hacked self-driving car might even be turned into a weapon”. The weaponization of beepers, talky-walkies is certainly not the last step in this process of potential dangers of technology. Smart cars come with additional risks, not only additional comfort. Better choose your rollercoaster wisely. 
Happy Time
“The times are a changing”, so is happiness. This is the spice of life we might add as well. Trajectories of happy life run not as flat lines simply on different, but largely parallel levels. Curves of different persons intersect. Even the focus of what determines personal happiness is different from one person to other. A job-focused person deviates substantially from a person deriving happiness mainly from her/his private life. The time dimension of happiness is yet another puzzle. Some persons have a focus on now and today, others consider a future time perspective for a happy life as less, equally or more important. Even the retrospective experience of happiness or unhappy childhood experiecences can override current emotions and oveall satisfaction with life. Economists apply a so-called discount rate to benfits or costs that accrue in future, which means that 1000 € in future, usually are estimated to have a lower value than 1000 € now. Happiness at some point in time in the future is likely to “suffer” from the same rationale. Satisfaction now is valued higher than even the same satisfaction at a later point in time. This probably explains a large deal why fewer people are concerned with their retirement benefits early on in their professional career and their job satisfaction trajectory. Many artists, apparently have a deviating time horizon. They endure economic hardship now for some recognition in future, but still have a happy time now.
(Image: Jorge Carrasco, Church Painting, France) 
Ballistic Missiles
Ballistic missiles have been studied as part of physics for centuries. The basic mechanics in gravitational fields like on earth are well known. Longer reach intercontinental ballistic missiles (ICBM) have been built by several countries for defensive or offensive purposes. China had demonstrated to master the science and technology of rockets since its latest launch of a ICBM in 1980. In 2024-9 China has demonstrated again, it is still capable to launch such missiles with long distance range (Japan Times 2024-9-25). This is both a technological task, but much more a geopolitical issue as a reminder to be taken seriously on the international political arena currently. Technological capabilities and capacities have regained geopolitical strategic importance as attempts to shift the global balance of power, which is undergoing multiple challenges or even changes. Flagging technological options is not only important to demonstrate own military strength, but to present a country as a potential strategic partner of global reach. Window dressing using weapons is much more oriented towards other countries (buyers of weapons mainly) than of relevance for Chinese society. Strategic alliances seek strategic partners. China is likely to receive more attention in the 21st century than before.
(Image: extrait de Gustave Courbet: La vague, 1870, Berlin SPK)
Nature Spectrum
When it comes to colors, nature has shown us the way forward for a long time. Before mankind „invented“ bionics, nature had opened up the full spectrum of colors. It took us thousands of years to understand how to recreate the colors of something technically rather simple like the rainbow. The colors continue to impress us independent of our cultural background. More interesting than, maybe the Atomium in Brussels, is the almost daily reproduction of a rainbow in a park in Brussels (park Bois de la Cambre). All it needs is a sunny day, water fountains and the right angle of observation. It is magic, but still simple science. Enjoy.
Theatre Archives
The process of creation in the realm of theatre performances has manifold facets. The French National Library (BNF) in Paris has received the archives of the „Théâtre du Rond-Point” in 2023 and honors the donation with a fascinating exhibition on the immense creativity of the author, scenarist and director Jean-Michel Ribes. (Image below) The professional diaries of Jean-Michel Ribes and the documentation through photographs from the performances and video extracts allow an intimate view into the hard work of producing theatrical performances, popular television shows and comedies. Jean-Michel Ribes took notes of all sorts and kept extensive lists of potential collaborators, actors, daily occurrences and just nice sounding phrases. From just a simple phrase heard on the streets he developed a small piece to be performed in shows. Listening to the people and enriching this with great actors in superb scenery made his popular success. The creativity seems to derive from ample note taking and coming back to them eventually.
Lost Objects
Project yourself into the future more than a hundred years from today, maybe even more than a thousand years from today. Some archaeologists will work on the planet earth to uncover the story behind the disappearance of the once very advanced species of homo erectus. They start drilling near some of the mystical sites of this civilization, the cities where mass celebrations were held called Olympic Games. These archaeologists use huge drilling machines to take samples at previous Olympic sites and uncover the remains of the thought to be modern civilizations on earth. Amongst all these samples they find all sorts of artifacts and layers left over. Plastics and metal structures appear in the samples as well as other forms of „artificializations“, transformations of earth’s principal „natural“ raw materials. The inhabitants of earth apparently lost or destroyed the planet‘s capabilities of CO2 storage and eventually became extinct. After fighting for survival on another planet the archeological expedition on earth saved this block of the remains of a doomed civilization. All this is pure science fiction, yet the specimen sample is exposed on the roof of the futuristic Fondation Louis Vuitton building near the Jardin d‘Acclimatation in Neuilly sur Seine. (Image of „Where the slaves live“ of Adrian Villar Rochas, 2014).
Olympic Medals
The distribution of Olympic medals across continents reveals the persistent inequality of rewards across the globe. The first African country in the overall ranking of countries by Olympic medals is Kenya on 17th place. All 11 medals including 4 gold medals were obtained in athletics and in running disciplines 800m and more. The financial resources needed to practice running as high level sport are probably the lowest one of all disciplines. Ethiopia is another African country with this tradition of high level long distance runners on the African continent. Equipment and coaching in other disciplines than athletics involves more infrastructure and becomes more costly and the possibility to reserve infrastructure for elite athletes of a country is more difficult if the infrastructure for the population at large is rather limited compared to the population size. Therefore, the Olympic tradition has to confront the challenge of unequal access to many disciplines of the Olympic Games also in Paris 2024. Being a very good athlete is just not enough if you lack the coaches, training and facilities to be able to compete with the well-equipped countries. The knowledge about the best details of a specific technique or optimization potentials are part of the Olympic challenges as well. The Americas, Europe and Asia might be confronted with new forms or another criticism of imperialist strategies, this time in the domain of sport. The winner or medalists take all. Country rankings appear a bit like the football device “money buys goals”. (Image, Fondation Louis Vuitton, Paris, Extrait of Omar Victor Diop “Diaspora” 2014-2015).
Burden of Disease
For the planning of health and care systems it is important to measure the so-called burden of disease within societies or related to specific diseases or social groups. A large-scale analysis of several longitudinal data bases of the populations 50 years of age and older shows that we have underestimated the burden of disease to societies of psychiatric disorders, like depression, in most societies.
A meta-study and overview of previous studies showed already that depression (age 60+) is more common in lower-income countries (between 25 and 33% of 60+population age group). High income countries, studied by Wang et al. 2024 in The Lancet Healthy Longevity, have rates of depression well below these levels, but a link to socioeconomic status, inactivity and loneliness is still evidenced. A five-year follow-up of persons aged 50+ years shows that the probability to develop a depression (hazard rate) is twice as high for persons with low socioeconomic status, who were socially
inactive and lonely than for socially active, high socioeconomic status and did not feel lonely at the beginning of measurement. The conclusion of the research highlights the need to develop and implement integrated and simultaneous initiatives to addressed the growing burden of disease related to depression in older persons. (Image, Jules Desbois, “Misery” 1887-89, Musée Rodin, Paris) 
Stress Ageing
The relationship between stress and aging is a complex one. Stress is known to accelerate aging and aging caused different reactions to stress. In short causality does not run only in one direction. Additionally new research published in Nature Medicine 2024 demonstrates that different genetic preconditions determine different response patterns to stress and subsequent brain aging. From anecdotal experience we are well aware of different persons coping very differently with stressful situations. Mastering of various coping mechanisms may attenuate the stress experience but the impact on preserving our brain remains an open question. Various other forms of lifestyle conditions like drugs and smoking cause specific forms of brain damage as well. 2 separate forms of dementia can be identified from brain MRI-images as well. The brain is no longer the black box of missing information about what is going on in humans. Put to the right purposes this is good news. (Image: break dance shooting Paris St Denis 2024)
Digital Museum
Paris has lots of museums to visit. At times, this can lead to a kind of mental overload. The ” Musée Marmottan Monet, in Paris allows to take home a digital and printed copy of your preferred, your own curated collection of images from the museum. This is a great learning experience. You scan the number of the item you want to include and a specialized application retrieves the image of the painting or object from their database into the App. After the visit you take a break in the café in the garden and sort your collection and if you like have it printed within a couple of minutes after you paid for the print or digital version. Upon special request I was told that I am allowed to share the link to the small booklet even on the web (Link to pdf below).
Since the visit to the Musée Marmottan Monet we have come back to the digital and printed versions several times and reading of accompanying texts and perfect quotations of origin make learning about art a fun experience. Going back to lived experiences makes more lasting impressions on our memories. Knowledge coupled with emotions is a powerful way to memorize. Sharing the experience with other persons like the readers of this blog is an additional advantage. Attentive readers of the blog entries will find references to many of the themes dealt with over the years in this series of blog entries. Such topics are: gender and art, technology and society, reflections on time, life courses, inequality, art history, funding of artists, lifelong learning or beauty.
(Booklet below in German LINK-pdf of 6MB. The app allows many language versions. You can produce those yourself from you collection within the App) 
Olympic Democracy
It is interesting to follow how the Olympic Games follow a moderate version of how to run a democracy. Paris 2024 takes pride in making this a little bit more visible. It is the people in democracies who decide whether to host Olympic games in their country and the many executive branches of governments have to coordinate their actions, budgets and planning accordingly. The National Assembly in Paris 2024 is showing its commitment to the Games in front of the building as well. Beyond the ancient discipline of archery, new disciplines like surfing is turned into a piece of art like a statue honoring the athletes. The IOC follows the division of powers with an assembly of states, an executive and the judiciary. In each discipline it is evident that without a well established and accepted independent judges the Games would become a farce and would no longer attract such huge crowds. It is a steep challenge to ensure that doping and other illegal activities do not destroy the peaceful spirit of the Olympic Games. Science has a role to play in advancing and controlling the athletes and their teams acting under cover. All in all, we find democracy in a nutshell including the necessary trust in institutions to ensure a fair running of the Games in Paris 2024.
Artists Robots
We know that the scientific and artistic dealings with robots have a long tradition. Whereas art of impressionism took up the challenge to paint the world outside the studio and embellished technological achievements like bridges and trains post hoc, modern extensions of science fiction to the world of robotics has extrapolated from the present. Artists became forerunners of technical evolution and thereby contributed to the acceptance of artificial intelligence to broader audiences. In 2018 The “Grand Palais” in Paris hosted an exhibition on “Artists & Robots” (Pdf booklet). Jérôme Neuters contributed an essay to the catalog of the exhibition on “L’imagination artificielle” which identified a additional role for artists in combination with AI. Some of the early adopters of the new possibilities of robots assisting artists, Nicolas Schoeffer is quoted to state: “l’artiste ne crée plus une oeuvre, il crée la création”. Like an invention of painting techniques or light or perspective in painting, robots allow a new way of representation of emotions or space. (Image Manfred Mohr, 1974 video Cubic Limit, Artists & Robots p.92-93)
Chapelles Sportifs
In Paris the “Chapelle Notre Dame des Sportifs” was benedicted in 2023 in view of the Olympic Games 2024 in France. The catholic church is following the popular Olympics to call for “Holy Games” with subtitle “L’évangile c’est sport”. The chapel can be visited in the splendid church “La Madeleine” in the middle of Paris. You can buy candles with inscriptions like “the last ones, will come first (Mt 20,16)” or other citations from the bible. On Friday 2024-7-19 a special ceremony was held where you could jointly pray to win in your discipline or, of course, for other noble causes. The whole service was recorded with multiple cameras from a professional television team for a worldwide dissemination. It remains an open question, whether the church sponsors athletes as well or whether the athletes sponsor the church through their followers on social media. in any case it is a bigger media event accompanying the Olympic games in Paris.
Credit donations
“credit” stems from the original latin word “cedere”. In the 1st person you write “credo”, which means I believe. If said in a religious building or church you show with this pronunciation that you believe tbe narrative of the religious community. In the 3rd person “credit” stand for s/he/it believes. In the financial sense it is the receiver of money from your credit card who believes or trusts you that you made an honest payment. Now, banks take commissions from each of these exchanges of trust. You are credit worthy or not. In some churches you now make donations using your credit card to facilitate business. Credit card companies also charge you on your donation. Win win situation we call this. I keep asking myself, whether I still “believe in angles” or only business angles. (Image Église Notre Dame des Victoires Brussels 2024-7)
Webpage Analytics
I do not collect data of detailed webpage analytics. Therefore, I thought I do not know anything and do not want to know anything about webpage visits of this webpage. However, the most basic information of how many times the webpage is visited per months is given by the hosting service of the webpage. The previous jump beyond 20.000 visits/month had the implication to move the security level of the webpage for me and all visitors to a higher level. Additional information of how many seconds an “internaut” is staying on the webpage tells, maybe a little bit about the interest in the content or image of a specific entry. Reaching 84.000 visitors/month was a surprise that asks for an explanation. Apparently, the most visited page is the blog entry on “geo-politics”. The longest time people stayed on a page or blog entry is a recent entry on “nutrition policy”.
Other statistics show that people who visited an entry on “find trust”, trusted in the webpage to click on many other entries or pages on “www.schoemann.org”.
I do not collect data or statistics on where visitors go after a visit. The hosting service, however, measures the so-called “jump-off” rate. This indicates the importance of the webpage as spring board to jump to other pages on the internet. It is usually = 1, just showing that you left somewhere. For some pages this reaches higher levels according to the number of links you offer on a blog entry, for example. It gives an indication whether you manage to lead on readers to explore the topic further. This is a usual evaluation question of lectures and seminars given at universities.
Last but not least, even without collecting any “real data” about visitors, it is part of the minimum information your browser transmits is the “operating system” used for access. Your smartphone provides the information on IOS, Android, Linux, or Windows versions used. These technical purposes remind me that there are still vast amounts of users of what we believe are outdated operating systems. Windows 7 and Windows 10 are still heavily in use across the globe. The hype around the latest operating system and smartphone is most likely only a phenomenon of the rich and wealthy in the rich parts of the western world. This reminds me to include images, which are small in data size to allow fast downloads in all parts of the world. We should embrace this as an important topic of geo-political relevance. 
Nutrition Competence
Nutrition is a good example of how a long lasting disregard in education and learning systems has led to huge medical costs for individuals and societies nowadays. The obesity pandemic calls for urgent action and policy changes in the field of nutrition policies and learning goals for children and adults. Medical doctors have mostly discarded that it is also their responsibility to provide medical guidance on nutrition, as this is highly controversial at times and asks for behavioural changes of the patient. School teachers see little scope to act on the issue due to increasing demands in fields of literacy, numeracy, problem-solving, digital and communication skills. Hence, the hope is to fill the instruction and learning gaps with a hybrid approach of nurses taking on both roles and communicate with children as well as adults alike. This is a tough challenge for these persons, but hopes a high that they can make a significant improvement to the nutrition competences of individuals, pupils, their parents and specific target groups.
The starting point is to recognize that there is an issue with nutrition. The next to establish the best evidence and based on this to develop a curriculum for the nurses to be well-prepared for the challenge in the field. Even with the differentiation of different levels of competences, the learning has to be rather encompassing several related fields as well. Individual, behavioural as well as society-level factors like biology, technology, religious beliefs, economic and social factors determine nutritional choices and consumption. Just because there are so many factors to consider does not justify to keep nutrition out of school curricula for example. Nutrition is a fine example of a topic which links disciplines across a broad range. It is a tasty, at times spicy mixture of issues to learn and apply. The former is the beginning, the latter the real challenge which needs ample and repeated guidance or coaching. (Image: Extrait of Abraham Mignon, 1640-1679, Undergrowth with flowers, animals and insects, MRBA Brussels) 
Nutrition Policy
The evidence on nutrition policies has accumulated a series of policy recommendations based on the best available evidence. The German Institute of Human Nutrition has presented these results repeatedly not only to the scientific community, but also to the interested public at the Science Week or the Long Night of Science. Their leaflet on the tools to improve our human nutrition in market economies highlights “nutrition competence” as a key component of a broad strategy to improve our food and subsequently health. Nutrition goes beyond the biological ingredients of food to include basic understandings of human metabolism including the times and timing of meals. This competence has to be transmitted to preschoolers, pupils as well as adults to stem the waves of obesity (ARTE Docu). Learning how to manage your own nutrition is a crucial competence to strive and survive. In schools it can have substantial impacts on performance and inequality of opportunities as well.
The science-based policy recommendations propose to alter the structure of costs, for example via tax reductions, in favor of healthy food. Plain water should be substantially cheaper than sweet beverages or alcoholic drinks. Nuts and proteins from vegetables fall in the same category as plain water. It is in the longer term interest of all of us that schools, canteens at work places or homes for the elderly offer also healthy nutrition at least as a daily option. More sustainability in food production is last, but not least part of nutrition policies. A lot to chew on to improve nutrition.
Science Transparent
Every year there is only one special big event (Lange Nacht der Wissenschaften) to make science more transparent to the population at large. Mostly hidden behind impressive walls and buildings guarded by porters,
science is not as transparent for the large public as it would like to be. In general people are rather intimidated or feel quickly out of place if scientist start to “explain” in lengthy formats their topics, ideas, questions and intermediate solutions. Even if the distributed open science fair is running only from 5 p.m to midnight, there are lots of things to learn and look into.
The website lists 1500+ sessions, 230 are in English language. You have to be selective or spread your interest over several years. I chose to start with, maybe, the toughest choice the Weierstrass-Institute near the Naturkundemuseum. Several projects of applied mathematics and stochastic processes were exposed and explained in more or less transparent and/or understandable form to the audiences. The talk by Julian Kern “Why chance doesn’t happen by chance” had a nice interactive format with “Kahoot-quizzes” and gave a good introduction, why it is useful to understand, statistics and stochastic processes in fields from biology, physics to social phenomena. The White board replaced already the black board and chalk.
The open doors policy, at least one day per year, raises interests and awareness for topics few people would only think that they existed already. The volume “Mathematics and Society” (Wolfgang König ed. 2016) is something I shall follow up on eventually. There are lots of applications of mathematics to social phenomena (time seen from the perspective of generations for example, image below from talk), which we have a hard time to come to grips with without the aid of mathematicians. 
Violence Potential
The book (editor Sabrow 2023) and the exhibition “Gewalt gegen Weimar. Zerreißproben der frühen Republik 1918-1923” need a broad European audience. The violence, which in the medium term destroyed the newly founded democracy of the Weimar Republic in Germany, is linked to the immediate aftermath of the 1st world war. The relatively calm abolition of monarchy in Germany did in no way prevent the eruption of violence within the new democracy. Extreme forces prepared in organized ways (Organisation Consul) and some in open public discourses the potential for the use of violence. Armaments left over from war equipped the Freikorps Movements and the potential to use the weapons was present at all times in the aftermath of WW1 in Germany. The contributions to the volume provide a detailed account of these 5 crucial years when democracy was able to defend itself against all odds. The strategies to take control of the country were built on a violent rhetoric which prepared the ground to put violent talk into action later on. This spiral of violence is hard to de-escalate once started. However, democracies have to foster ways to calm the spirits in periods of high potential violence. Elections as well as the campaigns before are the arms of democratic change. They should be used as such to pave the way to compromise.
Composing Assisted
Before the existence of digital composition tools composers were assisted by “Kopisten”. These persons rewrote the original draft of a composition into a “proper” version of the original document. Musicology has a tough time to deal with deviations from the original. It needs to be clarified which is the final and authorized version. In some instances this is far from evident. Just as an example Robert Schumann made ample use of the assistance of Kopist Otto Hermann Klausnitz (cf Nr 6), sometimes for the preparation of the composition, the finalized versions or the explicit drafting of different voices. Klausnitz himself was a flautist in Leipzig (Gewandhausorchester) and a conductor in Duesseldorf. Overall the debate is still going on, whether the composer’s draft or in many instances the Kopist’s version of the composition (authorized or not) prevails. In the age of AI, which is highly influential in modern music, such questions will most likely be intrinsic to the process of composition as well. AI is influential in evening out rough edges. Anette Mueller (2010) has done a great job to make this work of “Kopisten” much more transparent and her concluding chapter is programmatically entitled “Komponist und Kopist- Aspekte einer produktiven Kooperation”. (Image Mueller, A 2010 p. 340).
Cannabis Alcohol
The use of cannabis and/or alcohol is yet another question where we are used to ask questions in the form of: either the or the other? Over generations we have gotten used to no longer ask for each do you or don’t you. With the controlled liberalization or legalization of cannabis in some Western European states the framing of the question is more like you do the one or the other, particularly for many younger persons.
Decriminalization of both drugs in small quantities is apparently reducing crimes link to drug use and drug dealing. On the other hand, the thresholds for doing drugs are lower than they used to be. In inner cities it is therefore no longer a surprise to find both kinds of drugs with addictive potential next to each other (see image below). We know that it is a slippery road from regular drug use to uncontrolled dependency and personal disaster. For cannabis a study published in the Lancet (Petrilli et al. 2022) added the importance of the potency of tetrahydrocannabinol to the estimate of risks. This is similar to the studies that differentiate the level of alcohol in drinks consumed. The higher the concentration, the higher the risks. A simple proportional relationship prevails in both drugs. The cumulative effects of consuming both together might have quite surprising non-linear effects.
The big issue is the risks of mental health related to these drugs. However, the causal direction is not easy to detect. Drugs induce mental health problems, but also mental health issues lead to drug abuse. This remains quite a puzzle for scientists to disentangle.
Additionally, the link to smoking and addiction to nicotine is a frequently observed corollary. Studying just one single source of health problems and addiction might be too restrictive to learn about the whole set of causal effects and casualties. For the time being we seem to jump from one field of attention to the next one ignoring the multiple interrelated factors at hand. 