Area is a quantity that expresses the extent of a two-dimensional surface or shape, or planar lamina, in the plane.

In general, area in higher mathematics is seen as a special case of volume for two-dimensional regions.

Thus, the molecular formula of ethanol may be written in a paper in conformational, three-dimensional, full two-dimensional ( indicating every bond with no three-dimensional directions ), compressed two-dimensional ( CH < sub > 3 </ sub >– CH < sub > 2 </ sub >– OH ), separating the functional group from another part of the molecule ( C < sub > 2 </ sub > H < sub > 5 </ sub > OH ), or by its atomic constituents ( C < sub > 2 </ sub > H < sub > 6 </ sub > O ), according to what is discussed.

In computing, a mouse is a pointing device that functions by detecting two-dimensional motion relative to its supporting surface.

A cartoon is a form of two-dimensional illustrated visual art.

On two-dimensional display devices such as computer monitors the display size or viewable image size is the actual amount of screen space that is available to display a picture, video or working space, without obstruction from the case or other aspects of the unit's design.

The standard orientation, where the xy-plane is horizontal and the z-axis points up ( and the x-and the y-axis form a positively oriented two-dimensional coordinate system in the xy-plane if observed from above the xy-plane ) is called right-handed or positive.

Because a three-dimensional object is represented on the two-dimensional screen, distortion and ambiguity result.

A Projection ( linear algebra ) | projection of the cube is given since it is viewed on a two-dimensional screen.

Drawing is a form of visual art that makes use of any number of drawing instruments to mark a two-dimensional medium.

The standard way to do this, as carried out in the remainder of this article, is to define the Euclidean plane as a two-dimensional real vector space equipped with an inner product.

Abbott's best-known work is his 1884 novella Flatland: A Romance of Many Dimensions which describes a two-dimensional world and explores the nature of dimensions.

The spin degree of freedom for an electron is associated with a two-dimensional complex Hilbert space H, with each quantum state corresponding to a vector in that space.

The greatest common divisor is often written as GCD ( a, b ) or, more simply, as ( a, b ), although the latter notation is also used for other mathematical concepts, such as two-dimensional vectors.

The term GUI is restricted to the scope of two-dimensional display screens with display resolutions able to describe generic information, in the tradition of the computer science research at the PARC ( Palo Alto Research Center ).

Like weaving, knitting is a technique for producing a two-dimensional fabric made from a one-dimensional yarn or thread.

In mathematics, the Klein bottle () is a non-orientable surface, informally, a surface ( a two-dimensional manifold ) in which notions of left and right cannot be consistently defined.

Like the Möbius strip, the Klein bottle is a two-dimensional differentiable manifold which is not orientable.

Since the widespread adoption of digital setting circles, any classical engraved setting circle is now specifically identified as an " analog setting circle " ( ASC ).

An analog or analogue signal is any continuous signal for which the time varying feature ( variable ) of the signal is a representation of some other time varying quantity, i. e., analogous to another time varying signal.

Any information may be conveyed by an analog signal ; often such a signal is a measured response to changes in physical phenomena, such as sound, light, temperature, position, or pressure.

The physical variable is converted to an analog signal by a transducer.

The voltage or the current is said to be an " analog " of the sound.

In practice an analog signal is subject to electronic noise and distortion introduced by communication channels and signal processing operations, which can progressively degrade the signal-to-noise ratio.

Therefore as analog signal processing systems become more complex, they may ultimately degrade signal resolution to such an extent that their performance is surpassed by digital systems.

However a comparable performing digital system is more complex and can require more bandwidth than its analog counterpart.

In analog systems, it is difficult to detect when such degradation occurs.

The main advantage is the fine definition of the analog signal which has the potential for an infinite amount of signal resolution.

Another advantage with analog signals is that their processing may be achieved more simply than with the digital equivalent.

The primary disadvantage of analog signaling is that any system has noise – i. e., random unwanted variation.

Even if the resolution of an analog signal is higher than a comparable digital signal, the difference can be overshadowed by the noise in the signal.

Another method of conveying an analog signal is to use modulation.

The analog output is connected to a low-pass filter, which filters out high-frequency aliases when the Amiga is using a lower sampling rate ( see Nyquist limit ).

" Analog " indicates something that is mathematically represented by a set of continuous values ; for example, the analog clock uses constantly-moving hands on a physical clock face, where moving the hands directly alters the information that clock is providing.

Thus, an analog signal is one represented by a continuous stream of data, in this case along an electrical circuit in the form of voltage, current or charge changes ( compare with digital signals below ).

Analog ( or analogue ) television is the analog transmission that involves the broadcasting of encoded analog audio and analog video signal: one in which the information to be transmitted, the brightness and colors of the points in the image and the sound waves of the audio signal are represented by continuous variations of some aspect of the signal ; its amplitude, frequency or phase.

In many countries, over-the-air broadcast television of analog audio and analog video signals is being discontinued, to allow the re-use of the television broadcast radio spectrum for other services such as datacasting and subchannels.

The other variables include the dancer who is to perform the movement and the length of time he is to take in its performance.

This is less than the length of a jet runway -- well within the circle of destruction.

the athlete of by-gone years who wears a size 46 suit and puffs when he has finished a sentence of any length then, it is time to break it up and move on.

Some critics say that the length of stay in a hospital is too long.

Chuck a length of 1/8'' '' dia. drill rod into a drill press or some similar turning device and while it is rotating file the end square and then file a slight taper 1/8'' '' long.

The cross-sectional area of the cylinders is determined and then the volume of the individual cylinders is computed by multiplying the area by the stroke length, which is the equivalent of the length of the cylinders.

otherwise, you'll have to spend a few minutes to either attach a suitable spring clip somewhere on the press head or fit the key to a length of light chain and fasten to the bottom of the motor mount so that the key is out of the way when not in use.

The whole length of Essex bridge is one thousand and thirty feet and its breadth thirty-four.

Fortunately, although only a few years ago they held the student at arms length, today the business houses welcome the opportunity to aid the student, not only from an increased sense of community responsibility but also from the realization that the student of today is the interior designer of tomorrow -- that the student already is `` in the trade ''.

Although the play does show a certain structural amateurishness ( there are eleven acts varying in length from twenty-five seconds to an hour and a half ), the statement it makes concerning the ceaseless yearning and searching of youth is profound and worthy of our attention.

Mars has been observed twice at about 3-cm wave length, and the intensity of the observed radiation is in reasonable agreement with the thermal radiation which might be predicted on the basis of the known temperature of Mars.

Such an instrument is expected to be especially useful if it could be used to measure the elasticity of heavy pastes such as printing inks, paints, adhesives, molten plastics, and bread dough, for the elasticity is related to those various properties termed `` length '', `` shortness '', `` spinnability '', etc., which are usually judged by subjective methods at present.

A number of semiempirical estimates by various workers lead to the conclusion that the Af bond becomes symmetric when the Af bond length is about 2.4 to 2.5 A, but aside from the possible example of nickel dimethylglyoxime there have been no convincing reports of symmetric Af bonds.

Data on the former are scanty, but there can be little doubt that the latter is sometimes born at a length greater than that of any of the others, thereby lending support to the belief that the anaconda does, indeed, attain the greatest length.

For four of the six ( the anaconda and the amethystine python cannot be included for lack of data ) there is also a correlation between size at maturity and maximum length, the boa constrictor being the smallest and the Indian python the next in size at the former stage.

The following information on snakes varying greatly in size ( but all with less than a 10-foot maximum ) shows, when considered with the foregoing, that there is probably no correlation between the length of a snake and the time required for it to mature.