Mimicry

In evolutionary biology, mimicry is a similarity of one species to another that protects one or both. In the case of prey species, it is a class of antipredator adaptation. This similarity can be in appearance, behaviour, sound or scent. Mimics occur in the same areas as their models.

Mimicry occurs when a group of organisms, the mimics, evolve to share perceived characteristics with another group, the models. The evolution is driven by the selective action of a signal-receiver or dupe. Birds, for example, use sight to identify palatable insects (the mimics), whilst avoiding the noxious models.

The model is usually another species, except in cases of automimicry. The deceived signal-receiver is typically another organism, such as the common predator of two species. As an interaction, mimicry is in most cases advantageous to the mimic and harmful to the receiver, but may increase, reduce or have no effect on the fitness of the model depending on the situation. The model may be hard to identify: for example, eye spots may not resemble any specific organism's eyes, and camouflage often cannot be attributed to a particular model.

Mimic (Dungeons & Dragons)

In the Dungeons & Dragons fantasy role-playing game, the mimic is a type of fictional monster. It is portrayed as being able to change its shape to disguise its body as an inanimate object, commonly a chest. The mimic has a powerful adhesive that holds fast to creatures who touch the creature, allowing the mimic to beat the creature with its powerful pseudopods. The mimic was introduced in the first edition Advanced Dungeons & Dragons game's original Monster Manual. The mimic subsequently appeared in the game's second edition and third edition. Several variants of the creature have been introduced, with a variety of abilities and sizes.

Publication history

Advanced Dungeons & Dragons 1st edition (1977-1988)

The mimic made its first appearance in the original Monster Manual (1977), by Gary Gygax. This book described mimics as "subterranean creatures which cannot stand the light of the sun. They are able to perfectly mimic stone or wood." According to the book, mimics thus pose as items such as stonework, doors, or chests; when a character or creature touches the disguised mimic, the mimic can lash out with a bludgeoning pseudopod. A mimic excretes an adhesive glue to hold fast whatever touches it. The book states that all mimics move about constantly in search of prey. Mimics are described as neutral in alignment.

Mimic (film)

Mimic is an American 1997 science fiction horror film co-written and directed by Guillermo del Toro, and starring Mira Sorvino, Jeremy Northam, Josh Brolin, Charles S. Dutton and Giancarlo Giannini. It is based on a short story of the same name by Donald A. Wollheim.

Del Toro was unhappy with the film as released, especially because he did not succeed in obtaining a final cut of the film; however, his director's cut version was finally released in 2011. Mimic, whose U.S. theatrical gross was $25 million, was followed by two direct-to-video sequels, Mimic 2 (2001) and Mimic 3: Sentinel (2003), neither of them with del Toro involved.

It includes several examples of del Toro's most characteristic hallmarks. "I have a sort of a fetish for insects, clockwork, monsters, dark places, and unborn things," said del Toro, and this is evident in Mimic, where at times all are combined in long, brooding shots of dark, cluttered, muddy chaotic spaces. According to Alfonso Cuarón, del Toro's friend and colleague, "with Guillermo the shots are almost mathematical — everything is planned.”

Fold (geology)

A geological fold occurs when one or a stack of originally flat and planar surfaces, such as sedimentary strata, are bent or curved as a result of permanent deformation. Synsedimentary folds are those due to slumping of sedimentary material before it is lithified. Folds in rocks vary in size from microscopic crinkles to mountain-sized folds. They occur singly as isolated folds and in extensive fold trains of different sizes, on a variety of scales.

Folds form under varied conditions of stress, hydrostatic pressure, pore pressure, and temperature gradient, as evidenced by their presence in soft sediments, the full spectrum of metamorphic rocks, and even as primary flow structures in some igneous rocks. A set of folds distributed on a regional scale constitutes a fold belt, a common feature of orogenic zones. Folds are commonly formed by shortening of existing layers, but may also be formed as a result of displacement on a non-planar fault (fault bend fold), at the tip of a propagating fault (fault propagation fold), by differential compaction or due to the effects of a high-level igneous intrusion e.g. above a laccolith.

Aliasing

In signal processing and related disciplines, aliasing is an effect that causes different signals to become indistinguishable (or aliases of one another) when sampled. It also refers to the distortion or artifact that results when the signal reconstructed from samples is different from the original continuous signal.

Aliasing can occur in signals sampled in time, for instance digital audio, and is referred to as temporal aliasing. Aliasing can also occur in spatially sampled signals, for instance digital images. Aliasing in spatially sampled signals is called spatial aliasing.

Description

When a digital image is viewed, a reconstruction is performed by a display or printer device, and by the eyes and the brain. If the image data is not properly processed during sampling or reconstruction, the reconstructed image will differ from the original image, and an alias is seen.

An example of spatial aliasing is the moiré pattern one can observe in a poorly pixelized image of a brick wall. Spatial anti-aliasing techniques avoid such poor pixelizations. Aliasing can be caused either by the sampling stage or the reconstruction stage; these may be distinguished by calling sampling aliasing prealiasing and reconstruction aliasing postaliasing.

Space

Space is the boundless three-dimensional extent in which objects and events have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime. The concept of space is considered to be of fundamental importance to an understanding of the physical universe. However, disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework.

Space (The Arrogant Worms album)

Space, stylized as SPACE, is the fourteenth album by the Canadian comedy music group, The Arrogant Worms. It was released in March 2014.

Track listing