Monday, September 7, 2009

Cupidity


Cupidity is the excessive or rapacious desire and pursuit of money, wealth, power, food. It is generally considered a vice, and is one of the seven deadly sins in Catholicism.

Sunday, September 6, 2009

bijection


In mathematics, a bijection, or a bijective function is a function f from a set X to a set Y with the property that, for every y in Y, there is exactly one x in X such that
f(x) = y.

Saturday, September 5, 2009

Chrominance

Chrominance (chroma for short), is the signal used in video systems to convey the color information of the picture, separately from the accompanying luma signal. Chrominance is usually represented as two color-difference components: B'–Y' (blue – luma) and R'–Y' (red – luma). Each of these difference components may have scale factors and offsets applied to them, as specified by the applicable video standard.

In composite video signals, the so-called U and V signals modulate a color carrier signal, and the result is referred to as the chrominance signal; the phase and amplitude of this modulated chrominance signal correspond approximately to the hue and saturation of the color. In digital-video and still-image colorspaces such as Y'CbCr, the luma and chrominance components are digital sample values.

Friday, September 4, 2009

Heteronormativity

Heteronormativity is a term describing the marginalization of non-heterosexual lifestyles and the view that heterosexuality is the normal sexual orientation. Instances of this include the idea that people fall into two distinct and complementary categories (male and female), that sexual and marital relations are normal only when between people of different sexes, and that each sex has certain natural roles in life. The heteronormative view is that physical sex, gender identity, and gender roles should, in any given person, align to either all-male or all-female cultural norms.

The norms that this term describes might be explicit or implied. Those who identify and criticize heteronormativity say that it distorts discourse by stigmatizing some forms of sexuality and gender, and makes certain types of self-expression more difficult when that expression violates the norm. Individuals not considered heteronormative include homosexuals, bisexuals, asexuals, intersex individuals, people who are transgender, and people who are married to more than one partner such as polygamists.

Thursday, September 3, 2009

Wednesday, September 2, 2009

waldo


A remote manipulator, also known as a telefactor, telemanipulator, or waldo (after the short story "Waldo" by Robert A. Heinlein which features a man who invents and uses such devices), is a device which, through electronic, hydraulic, or mechanical linkages, allows a hand-like mechanism to be controlled by a human operator. The purpose of such a device is usually to move or manipulate hazardous materials for reasons of safety.

Tuesday, September 1, 2009

thagomizer


The thagomizer, or tail spikes, is an arrangement of four to ten spikes on the tails of particular dinosaurs of the clade Stegosauria, of which Stegosaurus stenops is the most familiar. The tail arrangement is believed to have been a defensive weapon against predators.

synanthrope

 A synanthrope (from ancient Greek σύν sýn "together, with" and ἄνθρωπος ánthrōpos "man") is an organism that evolve...