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The basic principles of war propaganda (Principes élémentaires de propagande de guerre) is a monograph by Anne Morelli published in 2001. It has not been translated into English. The subtitle recommends its "usability in case of cold war, hot war and lukewarm war" (Utilisables en cas de guerre froide, chaude ou tiède).

The ten "commandments" of propaganda which Anne Morelli elaborates in this work are, above all, an analytical framework for pedagogical purposes and for media analysis. Morelli does not want to take sides or defend "dictators", but show the regularity of use of the ten principles in the media and in society:

"I will not put to test the purity of one or the other's intentions. I am not going to find out who is lying and who is telling the truth, who is believing what he says, and who does not. My only intention is to illustrate the principles of propaganda that are used and to describe their functioning." (P. 6)

Nonetheless, it seems undeniable to the author that after the wars that characterize our epoch (Kosovo, Second Gulf War, Afghanistan War, Iraq War), Western democracies and their media  must be discussed.

As Rudolph Walter in his review in Die Zeit shows, Morelli in this work adapts the typical forms of various contents of propaganda to news of her time. She takes up Arthur Ponsonby's Falsehood in War-Time and George Demartial's La mobilisation des consciences. La guerre de 1914 about propaganda in the First World War, systematizes them in the form of ten principles, and applies them to both world wars, the war in the Balkan, and the war in Afghanistan. Four of the following principles, according to Walter just emanate directly from the principle of friend or foe, "we and them" mindset and simplistic thinking in terms of black and white.

🔗 Ancient Egypt 🔗 Maps 🔗 Geology

The Turin Papyrus Map is an ancient Egyptian map, generally considered the oldest surviving map of topographical interest from the ancient world. It is drawn on a papyrus reportedly discovered at Deir el-Medina in Thebes, collected by Bernardino Drovetti (known as Napoleon's Proconsul) in Egypt sometime before 1824 AD and now preserved in Turin's Museo Egizio. The map was drawn about 1150 BC by the well-known Scribe-of-the-Tomb Amennakhte, son of Ipuy. It was prepared for Ramesses IV's quarrying expedition to the Wadi Hammamat in the Eastern Desert, which exposes Precambrian rocks of the Arabian-Nubian Shield. The purpose of the expedition was to obtain blocks of bekhen-stone (metagraywacke sandstone) to be used for statues of the king.

🔗 Biography 🔗 Ukraine

Boris Tymofiyovych Romantschenko (Ukrainian: Борис Тимофійович Романченко; 20 January 1926 – 18 March 2022) was a survivor of the German concentration camps Buchenwald, Peenemünde, Dora and Bergen-Belsen. He was killed during the 2022 Russian invasion of Ukraine.

🔗 Geography 🔗 Mountains

A gravity hill, also known as a magnetic hill, mystery hill, mystery spot, gravity road, or anti-gravity hill, is a place where the layout of the surrounding land produces an optical illusion, making a slight downhill slope appear to be an uphill slope. Thus, a car left out of gear will appear to be rolling uphill against gravity. There are hundreds of recognized gravity hills around the world.

The slope of gravity hills is an optical illusion, although sites are often accompanied by claims that magnetic or supernatural forces are at work. The most important factor contributing to the illusion is a completely or mostly obstructed horizon. Without a horizon, it becomes difficult to judge the slope of a surface as a reliable reference is missing. Objects which one would normally assume to be more or less perpendicular to the ground, such as trees, may actually be leaning, offsetting the visual reference.

A 2003 study looked into how the absence of a horizon can skew the perspective on gravity hills by recreating a number of antigravity places in the lab to see how volunteers would react. As a conclusion, researchers from Universities of Padova and Pavia in Italy found that without a true horizon in sight, landmarks such as trees and signs actually played these tricks on the human brain.

The illusion is similar to the Ames room, in which objects can also appear to roll against gravity.

The opposite phenomenon—an uphill road that appears flat—is known in bicycle racing as a "false flat".

🔗 Economics 🔗 Politics

The Nordic model comprises the economic and social policies as well as typical cultural practices common to the Nordic countries (Denmark, Finland, Iceland, Norway, and Sweden). This includes a comprehensive welfare state and multi-level collective bargaining based on the economic foundations of social corporatism, with a high percentage of the workforce unionized and a sizable percentage of the population employed by the public sector (roughly 30% of the work force in areas such as healthcare, education, and government). Although it was developed in the 1930s under the leadership of social democrats, the Nordic model began to gain attention after World War II.

The three Scandinavian countries are constitutional monarchies, while Finland and Iceland have been republics since the 20th century. As of 2021, the Nordic countries are described as being highly democratic and all have a unicameral form of governance and use proportional representation in their electoral systems. Although there are significant differences among the Nordic countries, they all have some common traits. These include support for a universalist welfare state aimed specifically at enhancing individual autonomy and promoting social mobility, a corporatist system involving a tripartite arrangement where representatives of labour and employers negotiate wages, labour market policy is mediated by the government, and a commitment to private ownership within a market-based mixed economy, with Norway being a partial exception due to a large number of state-owned enterprises and state ownership in publicly listed firms. As of 2020, all of the Nordic countries rank highly on the inequality-adjusted HDI and the Global Peace Index as well as being ranked in the top 10 on the World Happiness Report.

Over the last few decades, the traditional Nordic model has transformed in some ways, including increased deregulation and expanding privatization of public services. However, the Nordic model is still distinguished from other models by the strong emphasis on public services and social investment.

🔗 Film 🔗 Film/Filmmaking 🔗 Photography 🔗 Photography/History of photography

The Zone System is a photographic technique for determining optimal film exposure and development, formulated by Ansel Adams and Fred Archer. Adams described the Zone System as "[...] not an invention of mine; it is a codification of the principles of sensitometry, worked out by Fred Archer and myself at the Art Center School in Los Angeles, around 1939–40."

The technique is based on the late 19th century sensitometry studies of Hurter and Driffield. The Zone System provides photographers with a systematic method of precisely defining the relationship between the way they visualize the photographic subject and the final results. Although it originated with black-and-white sheet film, the Zone System is also applicable to roll film, both black-and-white and color, negative and reversal, and to digital photography.

🔗 Statistics

In statistics, a Pólya urn model (also known as a Pólya urn scheme or simply as Pólya's urn), named after George Pólya, is a type of statistical model used as an idealized mental exercise framework, unifying many treatments.

In an urn model, objects of real interest (such as atoms, people, cars, etc.) are represented as colored balls in an urn or other container. In the basic Pólya urn model, the urn contains x white and y black balls; one ball is drawn randomly from the urn and its color observed; it is then returned in the urn, and an additional ball of the same color is added to the urn, and the selection process is repeated. Questions of interest are the evolution of the urn population and the sequence of colors of the balls drawn out.

This endows the urn with a self-reinforcing property sometimes expressed as the rich get richer.

Note that in some sense, the Pólya urn model is the "opposite" of the model of sampling without replacement, where every time a particular value is observed, it is less likely to be observed again, whereas in a Pólya urn model, an observed value is more likely to be observed again. In both of these models, the act of measurement has an effect on the outcome of future measurements. (For comparison, when sampling with replacement, observation of a particular value has no effect on how likely it is to observe that value again.) In a Pólya urn model, successive acts of measurement over time have less and less effect on future measurements, whereas in sampling without replacement, the opposite is true: After a certain number of measurements of a particular value, that value will never be seen again.

One of the reasons for interest in this particular rather elaborate urn model (i.e. with duplication and then replacement of each ball drawn) is that it provides an example in which the count (initially x black and y white) of balls in the urn is not concealed, which is able to approximate the correct updating of subjective probabilities appropriate to a different case in which the original urn content is concealed while ordinary sampling with replacement is conducted (without the Pólya ball-duplication). Because of the simple "sampling with replacement" scheme in this second case, the urn content is now static, but this greater simplicity is compensated for by the assumption that the urn content is now unknown to an observer. A Bayesian analysis of the observer's uncertainty about the urn's initial content can be made, using a particular choice of (conjugate) prior distribution. Specifically, suppose that an observer knows that the urn contains only identical balls, each coloured either black or white, but he does not know the absolute number of balls present, nor the proportion that are of each colour. Suppose that he holds prior beliefs about these unknowns: for him the probability distribution of the urn content is well approximated by some prior distribution for the total number of balls in the urn, and a beta prior distribution with parameters (x,y) for the initial proportion of these which are black, this proportion being (for him) considered approximately independent of the total number. Then the process of outcomes of a succession of draws from the urn (with replacement but without the duplication) has approximately the same probability law as does the above Pólya scheme in which the actual urn content was not hidden from him. The approximation error here relates to the fact that an urn containing a known finite number m of balls of course cannot have an exactly beta-distributed unknown proportion of black balls, since the domain of possible values for that proportion are confined to being multiples of ${\displaystyle 1/m}$, rather than having the full freedom to assume any value in the continuous unit interval, as would an exactly beta distributed proportion. This slightly informal account is provided for reason of motivation, and can be made more mathematically precise.

This basic Pólya urn model has been enriched and generalized in many ways.

🔗 Aviation 🔗 Soviet Union 🔗 Military history 🔗 Military history/Military aviation 🔗 Military history/North American military history 🔗 Military history/United States military history 🔗 Aviation/Aviation accident 🔗 Military history/Cold War 🔗 Military history/Russian, Soviet and CIS military history 🔗 Belgium

On 4 July 1989, a pilotless MiG-23 jet fighter of the Soviet Air Forces crashed into a house in Kortrijk, Belgium, killing one person. The pilot had ejected over an hour earlier near Kołobrzeg, Poland, after experiencing technical problems, but the aircraft continued flying for around 900 km (600 mi) before running out of fuel and descending into the ground.

🔗 Linguistics 🔗 Energy 🔗 Linguistics/Philosophy of language

Long-term nuclear waste warning messages are intended to deter human intrusion at nuclear waste repositories in the far future, within or above the order of magnitude of 10,000 years. Nuclear semiotics is an interdisciplinary field of research, first done by the American Human Interference Task Force in 1981.

A 1993 report from Sandia National Laboratories recommended that such messages be constructed at several levels of complexity. They suggested that the sites should include foreboding physical features which would immediately convey to future visitors that the site was both man-made and dangerous, as well as providing pictographic information attempting to convey some details of the danger, and written explanations for those able to read it.

🔗 Mathematics

Bellard's formula is used to calculate the nth digit of π in base 16.

Bellard's formula was discovered by Fabrice Bellard in 1997. It is about 43% faster than the Bailey–Borwein–Plouffe formula (discovered in 1995). It has been used in PiHex, the now-completed distributed computing project.

One important application is verifying computations of all digits of pi performed by other means. Rather than having to compute all of the digits twice by two separate algorithms to ensure that a computation is correct, the final digits of a very long all-digits computation can be verified by the much faster Bellard's formula.

Formula:

${\displaystyle {\begin{aligned}\pi ={\frac {1}{2^{6}}}\sum _{n=0}^{\infty }{\frac {(-1)^{n}}{2^{10n}}}\,\left(-{\frac {2^{5}}{4n+1}}\right.&{}-{\frac {1}{4n+3}}+{\frac {2^{8}}{10n+1}}-{\frac {2^{6}}{10n+3}}\left.{}-{\frac {2^{2}}{10n+5}}-{\frac {2^{2}}{10n+7}}+{\frac {1}{10n+9}}\right)\end{aligned}}}$