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 Florentine polymath Leon Battista Alberti begins writing the treatise On Painting, in which he argues for the importance of mathematical perspective in the creation of three-dimensional vision on a two-dimensional plane.

On two-dimensional display devices such as computer monitors and television sets, the display size ( or viewable image size or VIS ) 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.

On a contour map, the two-dimensional negative gradient of the altitude is a two-dimensional vector field, whose vectors are always perpendicular to the contours and also perpendicular to the direction of gravity.

On the other hand, in the two-dimensional case the Ising model is exactly soluble.

* Richard von Mises, On Bergman's integration method in two-dimensional compressible fluid flow, Harvard University, Graduate School of Engineering, 1949.

On the front of the CAC, below the picture, is an integrated microchip with 32K ( new versions have 64k and 144k ) of storage and a PDF417 stacked two-dimensional barcode.

On this diagram the work that is generated for each cycle corresponds to the area within the loop.

On this diagram, subducting Slab ( geology ) | slabs are in blue, and continental margins and a few plate boundaries are in red.

( On the HR diagram, the evolving star moves up and to the right of the main sequence.

Charles Darwin talks about envisioning evolution as a " tangled bank " in On the Origin of Species ; however, the book's sole illustration is of a branched diagram that is very tree-like.

On the right of the Hubble sequence diagram are two parallel branches encompassing the spiral galaxies.

On the diagram on the right, the white chameleon moves g6-e6-c6, astoundingly capturing all seven black pieces except the king in one move and delivering check.

On a standard supply and demand diagram, consumer surplus is the area ( triangular if the supply and demand curves are linear ) above the equilibrium price of the good and below the demand

On this basis, the diagram opposite ( redrawn from their article ) showed the real ' kingdoms ' ( their quotation marks ) of the eukaryotes.

On instruments using decimal measure, as shown in the diagram below, the indicating scale would have 10 graduations covering the same length as 9 on the data scale.

On a phase diagram the intersection of the eutectic temperature and the eutectic composition gives the eutectic point.

On the other hand, the group velocity is equal to the slope of the wavenumber – frequency diagram:

On the top is the time-position diagram.

On a blank space in his copy of The New York Times, he recorded the diagram found in Figure 1, and the equations derived below.

On the other hand, because of the intersecting deferents of Mars and the Sun ( see diagram ), it went against the Ptolemaic and Aristotelian notion that the planets were placed within nested spheres.

On such a diagram, every possible future location of the object lies within the cone.

** On some maps intended for wilderness or navigational use, including the topographic maps of the U. S. Geological Survey ( USGS ), a diagram shows the relationship between magnetic north in the area concerned ( with an arrow marked " MN ") and true north ( a vertical line with a five-pointed star at its top ), with a label near the angle between the MN arrow and the vertical line, stating the size of the declination and of that angle, in degrees, mils, or both.

( On USGS maps, the diagram is near the lower left hand corner, and the information labelled " GN " ( grid north ) in the same diagram is irrelevant to this discussion.

On orthodox keyboards this would be an impossible stretch for most players, but as on the Viennese bass octave it would have been easy to play, with the fingers depressing keys that visually appeared as D / G / B ( see diagram above ).

On the diagram one can see the quantity called capacity for entropy.

On a pressure volume diagram, an isochoric process appears as a straight vertical line.

On a circuit diagram, the symbols for components are labelled with a descriptor or reference designator matching that on the list of parts.

On an Hertzsprung – Russell diagram subdwarfs appear to lie below the main sequence.

On the other hand, the bright vision of the future has been directly stated in science fiction concerned with projecting ideal societies -- science fiction, of course, is related, if sometimes distantly, to that utopian literature optimistic about science, literature whose period of greatest vigor in the late nineteenth and early twentieth centuries produced Edward Bellamy's Looking Backward and H. G. Wells's A Modern Utopia.

Two treatises are sometimes erroneously attributed to him, one On Emotions, the other a commentary on Aristotle's Ethics ( really by Constantine Palaeocapa in the 16th century, or by John Callistus of Thessalonica ).

The earlier date, 293, is sometimes assigned and apparently supported by the authority of a " Coptic Fragment " ( published by Dr. O. von Lemm among the Mémoires de l ' académie impériale des sciences de S. Péterbourg, 1888 ) and corroborated by the maturity revealed in his two earliest treatises Contra Gentes ( Against the Heathens ) and De Incarnatione ( On the Incarnation ), which were admittedly written about the year 318 before Arianism had begun to make itself felt, as those writings do not show an awareness of Arianism.

On the Coast, rainfall, sometimes relentless heavy rain, dominates in winter because of consistent barrages of cyclonic low-pressure systems from the North Pacific, but on occasion ( and not every winter ) heavy snowfalls and below freezing temperatures arrive when modified arctic air reaches coastal areas, typically for short periods.

On the opposite extreme, summers in the Southern Interior valleys are hot ; for example in Osoyoos the July Maximum averages, hot weather sometimes moves towards the Coast or to the far north of the province.

As Chapter 66 of his On the Reckoning of Time, in 725 Bede wrote the Greater Chronicle ( chronica maiora ), which sometimes circulated as a separate work.

On modern keyboards, the key is usually labeled Pause with Break below, sometimes separated by a line, or Pause on the top of the keycap and Break on the front.

On more modern canals, " guard locks " or gates were sometimes placed to allow a section of canal to be quickly closed off, either for maintenance, or to prevent a major loss of water due to a canal breach.

On the Nature of Animals, (" On the Characteristics of Animals " is an alternative title ; usually cited, though, by its Latin title ), is a curious collection, in 17 books, of brief stories of natural history, sometimes selected with an eye to conveying allegorical moral lessons, sometimes because they are just so astonishing:

On this issue, Trotsky said, " as this regime becomes consolidated all affairs are concentrated in the hands of a small group, sometimes only of a secretary who appoints, removes, gives the instructions, inflicts the penalties, etc.

In order to reinforce his position that the Greeks were inclined towards plagiarism, he cites numerous instances of such inappropriate appropriation by classical Greek writers, reported second-hand from On Plagiarism, an anonymous 3rd century BC work sometimes ascribed to Aretades.

On the other hand, by emphasizing the medical nature of the condition, this term is sometimes rejected, such as by proponents of the autism rights movement.

On the other hand, many inscriptions are highly abbreviated and often casually formed, so the identification of individual letters is sometimes difficult.

On December 15 ( L. L. Zamenhof's birthday ), Esperanto speakers around the world celebrate Zamenhof Day, sometimes relabelled Esperanto Book Day.

On the day of painting, a thinner, smooth layer of fine plaster, the intonaco, is added to the amount of wall that can be expected to be completed in a day, sometimes matching the contours of the figures or the landscape, but more often just starting from the top of the composition.

On the other hand, even the British or the Gibraltarians sometimes date the beginning of British sovereignty in 1704 ( for instance, in its speech at the United Nations in 1994, the Gibraltar Chief Minister at the time, Joe Bossano, stated that Gibraltar has been a British colony ever since it was taken by Britain in 1704 ).

It has been said that audience members would get so boisterous in the boxes, that actors would sometimes break character and yell something such as, “ keep it down in there !” On the contrary, there were audience members who could not physically handle the brutality of the actions taking place on stage.

On the wrong side, the ends of the loops are visible, both the tops and bottoms, creating a much more bumpy texture sometimes called reverse stockinette.

On Friday, October 13, 1307 ( a date sometimes spuriously linked with the origin of the Friday the 13th superstition ) Philip ordered de Molay and scores of other French Templars to be simultaneously arrested.

On the other hand, the smaller families ( with up to 10 species ) are confined to the Southern Hemisphere, or sometimes just to Australia or South America.

Today Mobil continues as a major brand name within the combined company, as well as still being a gas station sometimes paired with their own store or On the Run.

* 1859 – Charles Darwin publishes On the Origin of Species, the anniversary of which is sometimes called " Evolution Day "