Traditional skinheads sometimes wear suits, often made out of two-tone tonic fabric ( shiny mohair-like material that changes colour in different light and angles ), or in a Prince of Wales or houndstooth check pattern.

The secondary structure may be also defined based on the regular pattern of backbone dihedral angles in a particular region of the Ramachandran plot ; thus, a segment of residues with such dihedral angles may be called a helix, regardless of whether it has the correct hydrogen bonds.

When they land on a piece of film or other detector, these beams make a diffraction pattern of spots ; the strengths and angles of these beams are recorded as the crystal is gradually rotated.

The radiation pattern of most antennas shows a pattern of " lobes " at various angles, directions where the radiated signal strength reaches a maximum, separated by " nulls ", angles at which the radiation falls to zero.

Therefore the radiation plot of most antennas shows a pattern of maxima or " lobes " at various angles, separated by " nulls " at which the radiation goes to zero.

The streets of many of these early cities were paved and laid out at right angles in a grid pattern, with a hierarchy of streets from major boulevards to residential alleys.

As a result, the crease pattern that arises from this method contains only 45 and 90 degree angles, which makes for easier folding.

By placing the axes at right angles, four quadrants form with each describing a behavioral pattern:

Also encircling the basin is a pattern of radial grooves called the " Imbrium Sculpture ", which have been interpreted as furrows cut in the Moon's surface by large projectiles blasted out of the basin at low angles, causing them to skim across the lunar surface ploughing out these features.

At most angles the loop has a fairly flat reception pattern, but when it is aligned perpendicular to the station the signal in one side cancels the signal in the other, producing a sharp drop in reception known as the " null ".

By a simple accident in geometry, all shock waves that should have had angles between 33 ° and 72 ° get compressed into a narrow band of wake with angles between 15 ° and 19 ° with the strongest constructive interference occurring at the outer edge, resulting in the two arms of the V in the Kelvin wake pattern.

Unlike the simpler single-line laser scanners, they produce a pattern of beams in varying orientations allowing them to read barcodes presented to it at different angles.

Engraving from Renaissance Italy showing Apollo, the Muses, the planetary spheres and musical ratios. The Music of the Spheres incorporates the metaphysical principle that mathematical relationships express qualities or ‘ tones ' of energy which manifest in numbers, visual angles, shapes and sounds – all connected within a pattern of proportion.

The new town, laid out in the " hippodamian plan " or iron-grid pattern -- a hallmark of Greek city planning, had brick walls reinforced with towers at the angles.

The antenna acts similarly to an electrically short dipole or monopole, and the radiation pattern, similar to these antennas is omnidirectional, with maximum radiation at right angles to the helix axis.

The design of the art glass windows is an abstract pattern of colored and clear glass using Wright's favorite 30 and 60-degree angles.

* Gridiron plan, in urban planning, a system that describes an ordered arrangement of streets in a regular grid pattern, intersecting at right angles

It was built to the Class A airfield standard, the main feature of which was a set of three converging runways each containing a concrete runway for takeoffs and landings, optimally placed at 60 degree angles to each other in a triangular pattern connecting to an enclosing perimeter track, of a standard width of 50 feet.

The illusion of the VOID pattern is created by line segments intersecting at various angles.

The bond angles and distances are all within the expected limits and the volume per oxygen is about normal.

In this publication measurements of interfacial angles of crystals are used to classify and identify chemical substances.

In most salamanders, the limbs are short and more or less the same length and project at right angles from the body.

Namely, these are rotations by angles which are rational multiples of π.

This choice gives us two alternative forms of geometry in which the interior angles of a triangle add up to exactly 180 degrees or less, respectively, and are known as Euclidean and hyperbolic geometries.

Western astrology is founded on the movements and relative positions of celestial bodies such as the Sun, Moon, planets, which are analyzed by their movement through signs of the zodiac ( spatial divisions of the ecliptic ) and by their aspects ( angles ) relative to one another.

The Gaussian theory, however, is only true so long as the angles made by all rays with the optical axis ( the symmetrical axis of the system ) are infinitely small, i. e. with infinitesimal objects, images and lenses ; in practice these conditions are not realized, and the images projected by uncorrected systems are, in general, ill defined and often completely blurred, if the aperture or field of view exceeds certain limits.

In acetylene, the H – C ≡ C bond angles are 180 °.

These sheets are rolled at specific and discrete (" chiral ") angles, and the combination of the rolling angle and radius decides the nanotube properties ; for example, whether the individual nanotube shell is a metal or semiconductor.

Crystals are commonly recognized by their shape, consisting of flat faces with sharp angles.

These atomic orbitals are known to have specific angular relationships between each other, and thus the valence bond model can successfully predict the bond angles observed in simple molecules.

In the late 1970s, Kerry Packer established the rival World Series Cricket ( WSC ) competition, and it introduced many of the features of One Day International cricket that are now commonplace, including coloured uniforms, matches played at night under floodlights with a white ball and dark sight screens, and, for television broadcasts, multiple camera angles, effects microphones to capture sounds from the players on the pitch, and on-screen graphics.

Therefore there are now a huge variety of different styles and types of map-for example, one area which has evolved a specific and recognisable variation are those used by public transport organisations to guide passengers, namely urban rail and metro maps, many of which are loosely based on 45 degree angles as originally perfected by Harry Beck and George Dow.

* The idealized descriptions of 5 -, 7 -, 8 -, and 9-coordination are often indistinct geometrically from alternative structures with slightly different L-M-L ( ligand-metal-ligand ) angles.

Other visual and aural cues are also taken from film noir, in ‘ Pierrot Le Fou ’ for instance, Spike battles an enraged homicidal clown across a fairground, accompanied by lighting and camera angles any film noir would be proud of.

Organic light-emitting diode ( OLED ) monitors provide higher contrast and better viewing angles than LCDs, and are predicted to replace them.

The F-corona ( F for Fraunhofer ) is created by sunlight bouncing off dust particles, and is observable because its light contains the Fraunhofer absorption lines that are seen in raw sunlight ; the F-corona extends to very high elongation angles from the Sun, where it is called the zodiacal light.

* a rectangle: a quadrilateral that has interior angles which are all right angles.

These angles can be reproduced on the drawing surface and then rechecked to make sure they are accurate.

Taken as a physical description of space, postulate 2 ( extending a line ) asserts that space does not have holes or boundaries ( in other words, space is homogeneous and unbounded ); postulate 4 ( equality of right angles ) says that space is isotropic and figures may be moved to any location while maintaining congruence ; and postulate 5 ( the parallel postulate ) that space is flat ( has no intrinsic curvature ).

It is an intrinsic property which can be determined by measuring length and angles and does not depend on the way the surface is embedded in space.

Bernhard Riemann extended Gauss's theory to higher dimensional spaces called manifolds in a way that also allows distances and angles to be measured and the notion of curvature to be defined, again in a way that was intrinsic to the manifold and not dependent upon its embedding in higher-dimensional spaces.

Though is possible to define the angles by geometry, normally the intrinsic rotations equivalence or the extrinsic rotations equivalence are used instead.

When the extrinsic rotations equivalence is used the given angles are inverted respect the former, meaning that the first angle is the intrinsic rotation and the last one the precession.

Using the intrinsic rotations equivalence, Tait – Bryan angles correspond with the three rotations with a different axis.

For either Euler or Tait-Bryan angles, it is very simple to convert from an intrinsic ( rotating axes ) to an extrinsic ( static axes ) convention, and vice-versa: just swap the order of the operations.

For Tait-Bryan angles, also intrinsic and extrinsic conventions can be used, giving therefore two meanings for every convention name.

Proper clones have the same intrinsic functions as the original Tom Poindexter version ; sometimes however the direction of angles is changed to match the standard C library's trigonometric functions.