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🔗 Psychology

The James–Lange theory is a hypothesis on the origin and nature of emotions and is one of the earliest theories of emotion within modern psychology. It was developed by philosopher John Dewey and named for two 19th-century scholars, William James and Carl Lange (see modern criticism for more on the theory's origin). The basic premise of the theory is that physiological arousal instigates the experience of emotion. Previously people considered emotions as reactions to some significant events or their features, i.e. events come first, and then there is an emotional response. James-Lange theory proposed that the state of the body can induce emotions or emotional dispositions. In other words, this theory suggests that when we feel teary, it generates a disposition for sad emotions; when our heartbeat is out of normality, it makes us feel anxiety. Instead of feeling an emotion and subsequent physiological (bodily) response, the theory proposes that the physiological change is primary, and emotion is then experienced when the brain reacts to the information received via the body's nervous system. It proposes that each specific category of emotion is attached to a unique and different pattern of physiological arousal and emotional behaviour in reaction due to an exciting stimulus.

The theory has been criticized and modified over the course of time, as one of several competing theories of emotion. Modern theorists have built on its ideas by proposing that the experience of emotion is modulated by both physiological feedback and other information, rather than consisting solely of bodily changes, as James suggested. Psychologist Tim Dalgleish states that most modern affective neuroscientists would support such a viewpoint. In 2002, a research paper on the autonomic nervous system stated that the theory has been "hard to disprove".

🔗 Biography 🔗 Russia 🔗 Military history 🔗 China 🔗 Military history/Military biography 🔗 Central Asia 🔗 Russia/Russian, Soviet, and CIS military history 🔗 Russia/history of Russia 🔗 Mongols 🔗 Military history/Medieval warfare

Subutai (Classical Mongolian: Sübügätäi or Sübü'ätäi; Tuvan: Сүбэдэй, [sybɛˈdɛj]; Modern Mongolian: Сүбээдэй, Sübeedei. [sʊbeːˈdɛ]; Chinese: 速不台 1175–1248) was an Uriankhai general, and the primary military strategist of Genghis Khan and Ögedei Khan. He directed more than 20 campaigns in which he conquered 32 nations and won 65 pitched battles, during which he conquered or overran more territory than any other commander in history. He gained victory by means of imaginative and sophisticated strategies and routinely coordinated movements of armies that were hundreds of kilometers away from each other. He is also remembered for devising the campaign that destroyed the armies of Hungary and Poland within two days of each other, by forces over 500 kilometers apart.

🔗 Business 🔗 Psychology 🔗 Marketing & Advertising 🔗 Sociology 🔗 Media 🔗 Retailing 🔗 Home Living

Overchoice or choice overload is the paradoxical phenomenon that choosing between a large variety of options can be detrimental to decision making processes. The term was first introduced by Alvin Toffler in his 1970 book, Future Shock.

🔗 Aviation 🔗 France 🔗 Germany 🔗 Disaster management 🔗 Aviation/Aviation accident 🔗 Spain 🔗 Crime and Criminal Biography

Germanwings Flight 9525 was a scheduled international passenger flight from Barcelona–El Prat Airport in Spain to Düsseldorf Airport in Germany. The flight was operated by Germanwings, a low-cost carrier owned by the German airline Lufthansa. On 24 March 2015, the aircraft, an Airbus A320-211, crashed 100 km (62 mi; 54 nmi) north-west of Nice in the French Alps. All 144 passengers and six crew members were killed.

The crash was deliberately caused by the co-pilot, Andreas Lubitz, who had previously been treated for suicidal tendencies and declared unfit to work by his doctor. Lubitz kept this information from his employer and instead reported for duty. Shortly after reaching cruise altitude and while the captain was out of the cockpit, Lubitz locked the cockpit door and initiated a controlled descent that continued until the aircraft hit a mountainside.

Aviation authorities swiftly implemented new recommendations from the European Union Aviation Safety Agency that required two authorised personnel in the cockpit at all times but, by 2017, Germanwings and other German airlines had dropped the rule.

The Lubitz family held a press conference in March 2017 during which Lubitz's father said that they did not accept the official investigative findings that his son deliberately caused the crash. By 2017, Lufthansa had paid €75,000 to the family of every victim, as well as €10,000 in pain and suffering compensation to every close relative of a victim.

🔗 Computing 🔗 Reference works 🔗 Belgium

The Mundaneum was an institution which aimed to gather together all the world's knowledge and classify it according to a system developed called the Universal Decimal Classification. It was developed at the turn of the 20th century by Belgian lawyers Paul Otlet and Henri La Fontaine. The Mundaneum has been identified as a milestone in the history of data collection and management, and (somewhat more tenuously) as a precursor to the Internet.

In the 21st century, the Mundaneum is a non-profit organisation based in Mons, Belgium that runs an exhibition space, website and archive which celebrate the legacy of the original Mundaneum.

🔗 Death 🔗 England 🔗 Middle Ages 🔗 Middle Ages/History 🔗 Visual arts 🔗 Lincolnshire 🔗 Hertfordshire

The Eleanor crosses were a series of twelve tall and lavishly decorated stone monuments topped with crosses erected in a line down part of the east of England. King Edward I had them built between 1291 and about 1295 in memory of his beloved wife Eleanor of Castile. The King and Queen had been married for 36 years and she stayed by the King’s side through his many travels. While on a royal progress, she died in the East Midlands in November 1290, perhaps due to fever. The crosses, erected in her memory, marked the nightly resting-places along the route taken when her body was transported to Westminster Abbey near London.

The crosses stood at Lincoln, Grantham and Stamford, all in Lincolnshire; Geddington and Hardingstone in Northamptonshire; Stony Stratford in Buckinghamshire; Woburn and Dunstable in Bedfordshire; St Albans and Waltham (now Waltham Cross) in Hertfordshire; Cheapside in London; and Charing (now Charing Cross) in Westminster.

Three of the medieval monuments – those at Geddington, Hardingstone and Waltham Cross – survive more or less intact; but the other nine, other than a few fragments, are lost. The largest and most ornate of the twelve was the Charing Cross. Several memorials and elaborated reproductions of the crosses have been erected, including the Queen Eleanor Memorial Cross at Charing Cross Station (built 1865).

🔗 Computer science

In computer science, a skip list is a data structure that allows ${\displaystyle {\mathcal {O}}(\log n)}$ search complexity as well as ${\displaystyle {\mathcal {O}}(\log n)}$ insertion complexity within an ordered sequence of ${\displaystyle n}$ elements. Thus it can get the best features of an array (for searching) while maintaining a linked list-like structure that allows insertion, which is not possible in an array. Fast search is made possible by maintaining a linked hierarchy of subsequences, with each successive subsequence skipping over fewer elements than the previous one (see the picture below on the right). Searching starts in the sparsest subsequence until two consecutive elements have been found, one smaller and one larger than or equal to the element searched for. Via the linked hierarchy, these two elements link to elements of the next sparsest subsequence, where searching is continued until finally we are searching in the full sequence. The elements that are skipped over may be chosen probabilistically or deterministically, with the former being more common.

🔗 Psychology

An autostereogram is a single-image stereogram (SIS), designed to create the visual illusion of a three-dimensional (3D) scene from a two-dimensional image. In order to perceive 3D shapes in these autostereograms, one must overcome the normally automatic coordination between accommodation (focus) and horizontal vergence (angle of one's eyes). The illusion is one of depth perception and involves stereopsis: depth perception arising from the different perspective each eye has of a three-dimensional scene, called binocular parallax.

The simplest type of autostereogram consists of horizontally repeating patterns (often separate images) and is known as a wallpaper autostereogram. When viewed with proper convergence, the repeating patterns appear to float above or below the background. The well-known Magic Eye books feature another type of autostereogram called a random dot autostereogram. One such autostereogram is illustrated above right. In this type of autostereogram, every pixel in the image is computed from a pattern strip and a depth map. A hidden 3D scene emerges when the image is viewed with the correct convergence.

Autostereograms are similar to normal stereograms except they are viewed without a stereoscope. A stereoscope presents 2D images of the same object from slightly different angles to the left eye and the right eye, allowing us to reconstruct the original object via binocular disparity. When viewed with the proper vergence, an autostereogram does the same, the binocular disparity existing in adjacent parts of the repeating 2D patterns.

There are two ways an autostereogram can be viewed: wall-eyed and cross-eyed. Most autostereograms (including those in this article) are designed to be viewed in only one way, which is usually wall-eyed. Wall-eyed viewing requires that the two eyes adopt a relatively parallel angle, while cross-eyed viewing requires a relatively convergent angle. An image designed for wall-eyed viewing if viewed correctly will appear to pop out of the background, while if viewed cross-eyed it will instead appear as a cut-out behind the background and may be difficult to bring entirely into focus.

🔗 Rocketry

A rolleron is a type of aileron used for rockets, placed at the trailing end of each fin, and used for passive stabilization against rotation. Inherent to the rolleron is a metal wheel with notches along the circumference. On one side, the notches protrude into the airflow. During flight, this will spin the wheels up to a substantial speed. The wheels then act as gyroscopes. Any tendency of the rocket to rotate around its major axis will be counteracted by the rollerons: the gyroscopic precession acts to move the rolleron in the opposite direction to the rotation.

Rollerons were first used in the AIM-9 Sidewinder missile.