Darkness

Darkness, the polar opposite to brightness, is understood to be an absence of visible light. It is also the appearance of black in a colored space.

Humans are unable to distinguish color when either light or darkness predominate. In conditions of insufficient light, perception is achromatic and ultimately, black.

The emotional response to darkness has generated metaphorical usages of the term in many cultures.

Scientific

Perception

The perception of darkness differs from the mere absence of light due to the effects of after images on perception. In perceiving, the eye is active, and that part of the retina that is unstimulated produces a complementary afterimage.

Physics

In terms of physics, an object is said to be dark when it absorbs photons, causing it to appear dim compared to other objects. For example, a matte black paint does not reflect much visible light and appears dark, whereas white paint reflects much light and appears bright. For more information see color.

Light cannot be absorbed without limit. According to the principle of the conservation of Energy, energy cannot be created or destroyed; it can only be converted from one type to another. Consequently, most objects that absorb visible light reemit it as heat. So, although an object may appear dark, it is likely bright at a frequency that humans cannot perceive. For more information see thermodynamics.

In Solitude

In Solitude was a Swedish heavy metal band from Uppsala, Sweden.

History

The band formed in 2002 with Henrik Helenius, Niklas Lindström, Gottfrid Åhman, and Uno Bruniusson. Pelle Åhman (Gottfrid's brother) joined the band as their lead vocalist in 2003. They released their first, self-titled demo in 2004. The following year, vocalist/guitarist Henrik Heleius left the band and is replaced by Mattias Gustafsson in the same year. In 2006 the band released the second demo, 'Hidden Danger', and In 2008, Sweden's S.M.P. Records released the EP Hidden Dangers as a 7″. Shortly after this the band released their self-titled full-length debut in the form of a CD on Pure Steel Records and on vinyl through High Roller Records. The album was recorded at Burlesco Studios at the same as the demos, and was produced by Hasse Bruniusson. In support of the album, In Solitude participated in Keep It True, Up the Hammers, Pounding Metal, Metal Magic and Hell's Pleasures festivals throughout the year, before Mattias Gustafsson left the band in 2009.

Pleasure

Pleasure describes the broad class of mental states that humans and other animals experience as positive, enjoyable, or worth seeking. It includes more specific mental states such as happiness, entertainment, enjoyment, ecstasy, and euphoria. The early psychological account of pleasure, the pleasure principle, describes it as a positive feedback mechanism, motivating the organism to recreate in the future the situation which it has just found pleasurable and to avoid situations that have caused pain in the past.

The experience of pleasure is subjective and different individuals will experience different kinds and amounts of pleasure in the same situation. Many pleasurable experiences are associated with satisfying basic biological drives, such as eating, exercise, hygiene, sex or defecation. Other pleasurable experiences are associated with social experiences and social drives, such as the experiences of accomplishment, recognition, and service. The appreciation of cultural artifacts and activities such as art, music, dancing, and literature is often pleasurable.

Uno

Uno may refer to:

People

Places

Automobiles

Games

UNO

Facebook features

Facebook is a social network service website launched on February 4, 2004. This is a list of software and technology features that can be found on the Facebook website.

Facebook structure

News Feed

On September 6, 2006, Ruchi Sanghvi announced a new home page feature called News Feed. Originally, when users logged into Facebook, they were presented with a customizable version of their own profile. The new layout, by contrast, created an alternative home page in which users saw a constantly updated list of their friends' Facebook activity. News Feed highlights information that includes profile changes, upcoming events, and birthdays, among other updates. This has enabled spammers and other users to manipulate these features by creating illegitimate events or posting fake birthdays to attract attention to their profile or cause. News Feed also shows conversations taking place between the walls of a user's friends. An integral part of the News Feed interface is the Mini Feed, a news stream on the user's profile page that shows updates about that user. Unlike in the News Feed, the user can delete events from the Mini Feed after they appear so that they are no longer visible to profile visitors. In 2011 Facebook updated the News Feed to show top stories and most recent stories in one feed, and the option to highlight stories to make them top stories, as well as to un-highlight stories. In response to users' criticism, Facebook later updated the News Feed to allow users to view recent stories first.