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🔗 Finance & Investment 🔗 Economics 🔗 Business

The Hindenburg Omen was a proposed technical analysis pattern, named after the Hindenburg disaster of May 6, 1937. It was created by Jim Miekka, who believed that it portended a stock market crash.

🔗 Computing 🔗 Photography 🔗 Computer graphics

Design rule for Camera File system (DCF) is a JEITA specification (number CP-3461) which defines a file system for digital cameras, including the directory structure, file naming method, character set, file format, and metadata format. It is currently the de facto industry standard for digital still cameras. The file format of DCF conforms to the Exif specification, but the DCF specification also allows use of any other file formats.

The latest version of the standard is 2.0 (2010 edition).

🔗 Crime 🔗 Organized crime 🔗 Belgium

The Brabant killers, also named the Nijvel Gang in Dutch-speaking media (Dutch: De Bende van Nijvel), and the mad killers of Brabant in French-speaking media (French: Les Tueurs fous du Brabant), are believed to be responsible for a series of violent attacks that mainly occurred in the Belgian province of Brabant between 1982 and 1985. A total of 28 people died and 22 were injured. The actions of the gang, believed to consist of a core of three men, made it Belgium's most notorious unsolved crime spree. The active participants were known as The Giant (a tall man who may have been the leader); the Killer (the main shooter) and the Old Man (a middle aged man who drove). The identities and whereabouts of the "Brabant killers" are unknown. Although significant resources are still dedicated to it, the most recent arrests in the case were of the now-retired original senior detectives. Failure to catch the gang resulted in a parliamentary inquiry. There have been many theories of ulterior motives behind the crimes.

🔗 History 🔗 Books 🔗 Socialism 🔗 Anarchism

The Art of Not Being Governed: An Anarchist History of Upland Southeast Asia is a book-length anthropological and historical study of the Zomia highlands of Southeast Asia written by James C. Scott published in 2009. Zomia, as defined by Scott, includes all the lands at elevations above 300 meters stretching from the Central Highlands of Vietnam to Northeastern India. That encompasses parts of Vietnam, Cambodia, Laos, Thailand, and Myanmar, as well as four provinces of China. Zomia's 100 million residents are minority peoples "of truly bewildering ethnic and linguistic variety", he writes. Among them are the Akha, Hmong, Karen, Lahu, Mien, and Wa peoples.

🔗 Apple Inc./Macintosh 🔗 Apple Inc.

In the Apple macOS operating system, .DS_Store is a file that stores custom attributes of its containing folder, such as the position of icons or the choice of a background image. The name is an abbreviation of Desktop Services Store, reflecting its purpose. It is created and maintained by the Finder application in every folder, and has functions similar to the file desktop.ini in Microsoft Windows. Starting with a full stop (period) character, it is hidden in Finder and many Unix utilities. Its internal structure is proprietary, but has since been reverse-engineered.

🔗 Philosophy 🔗 Philosophy/Philosophy of religion 🔗 Philosophy/Philosophy of mind 🔗 Philosophy/Metaphysics

Neutral monism is an umbrella term for a class of metaphysical theories in the philosophy of mind, concerning the relation of mind to matter. These theories take the fundamental nature of reality to be neither mental nor physical; in other words it is "neutral".

Neutral monism has gained prominence as a potential solution to theoretical issues within the philosophy of mind, specifically the mind–body problem and the hard problem of consciousness. The mind–body problem is the problem of explaining how mind relates to matter. The hard problem is a related philosophical problem targeted at physicalist theories of mind specifically: the problem arises because it is not obvious how a purely physical universe could give rise to conscious experience. This is because physical explanations are mechanistic: that is, they explain phenomena by appealing to underlying functions and structures. And, though explanations of this sort seem to work well for a wide variety of phenomena, conscious experience seems uniquely resistant to functional explanations. As the philosopher David Chalmers has put it: "even when we have explained the performance of all the cognitive and behavioral functions in the vicinity of experience - perceptual discrimination, categorization, internal access, verbal report - there may still remain a further unanswered question: Why is the performance of these functions accompanied by experience?" The hard problem has motivated Chalmers and other philosophers to abandon the project of explaining consciousness in terms physical or chemical mechanisms (only 56.5% of philosophers are physicalists, according to the most recent PhilPapers survey).

With this, there has been growing demand for alternative ontologies (such as neutral monism) that may provide explanatory frameworks more suitable for explaining the existence of consciousness. It has been accepted by several prominent English-speaking philosophers, such as William James and Bertrand Russell.

🔗 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".

🔗 Psychology 🔗 Anthroponymy

The name-letter effect is the tendency of people to prefer the letters in their name over other letters in the alphabet. Whether subjects are asked to rank all letters of the alphabet, rate each of the letters, choose the letter they prefer out of a set of two, or pick a small set of letters they most prefer, on average people consistently like the letters in their own name the most. Crucially, subjects are not aware that they are choosing letters from their name.

Discovered in 1985 by the Belgian psychologist Jozef Nuttin, the name-letter effect has been replicated in dozens of studies, involving subjects from over 15 countries, using four different alphabets. It holds across age and gender. People who changed their names many years ago tend to prefer the letters of both their current and original names over non-name letters. The effect is most prominent for initials, but even when initials are excluded, the remaining letters of both given and family names still tend to be preferred over non-name letters.

Most people like themselves; the name is associated with the self, and hence the letters of the name are preferred, despite the fact that they appear in many other words. People who do not like themselves tend not to exhibit the name-letter effect. A similar effect has been found for numbers related to birthdays: people tend to prefer the number signifying the day of the month on which they were born. Alternative explanations for the name-letter effect, such as frequent exposure and early mastery, have been ruled out. In psychological assessments, the Name Letter Preference Task is widely used to estimate implicit self-esteem.

There is some evidence that the effect has implications for real-life decisions. In the lab, people disproportionately favor brands matching their initials. An analysis of a large database of charity donations revealed that a disproportionately large number of people donate to disaster relief following hurricanes with names sharing their initial letter (e.g. Kate and Kevin following Hurricane Katrina). Studies that investigate the impact of name-letter matching on bigger life decisions (where to live, whom to marry, which occupation to take on) are controversial.

🔗 Psychology

The Johari window is a technique designed to help people better understand their relationship with themselves and others. It was created by psychologists Joseph Luft (1916–2014) and Harrington Ingham (1916–1995) in 1955, and is used primarily in self-help groups and corporate settings as a heuristic exercise. Luft and Ingham named their model "Johari" using a combination of their first names.

🔗 Computing

In computer programming, homoiconicity (from the Greek words homo- meaning "the same" and icon meaning "representation") is a property of some programming languages. A language is homoiconic if a program written in it can be manipulated as data using the language, and thus the program's internal representation can be inferred just by reading the program itself. For example, a Lisp program is written as a regular Lisp list, and can be manipulated by other Lisp code. In homoiconic languages, all code can be accessed and transformed as data, using the same representation. This property is often summarized by saying that the language treats "code as data".

In a homoiconic language, the primary representation of programs is also a data structure in a primitive type of the language itself. This makes metaprogramming easier than in a language without this property: reflection in the language (examining the program's entities at runtime) depends on a single, homogeneous structure, and it does not have to handle several different structures that would appear in a complex syntax.

As noted above, a commonly cited example is Lisp, which was created to allow for easy list manipulations and where the structure is given by S-expressions that take the form of nested lists. Lisp programs are written in the form of lists; the result is that the program can access its own functions and procedures while running, and programmatically alter itself on the fly. Homoiconic languages typically include full support of syntactic macros, allowing the programmer to express transformations of programs in a concise way. Examples are the programming languages Clojure (a contemporary dialect of Lisp), Rebol (also its successor Red), Refal, Prolog, and more recently Julia.