* Supralateral arc

* Carbon arc lamps use a mixture of rare earth elements to improve the light quality.

The application in carbon arc light led to the exposure of people to rare earth element oxides and fluorides, sometimes led to pneumoconiosis.

* Infralateral arc, a rare halo, an optical phenomenon appearing similar to a rainbow under a white parhelic circle

* Parry arc, a rare halo, an optical phenomenon which occasionally appears over a 22 ° halo together with an upper tangent arc

* Subhelic arc, a rare halo that curves upwards from the horizon and touches the tricker arc above the anthelic point

* Praseodymium is present in the rare earth mixture whose fluoride forms the core of carbon arc lights which are used in the motion picture industry for studio lighting and projector lights.

A tragic and sympathetic antagonist in his initial two-issue arc, having acquired his vampiric addiction while researching a cure for his own rare, fatal blood disease, Morbius collided again with Spider-Man and others in Marvel Team-Up # 3-4 ( July & Sept. 1972 ).

Game designer Greg Costikyan said that " My Life with Master works because Czege has chosen as the theme for his game a story genre ( Gothic horror ) that has a defined narrative arc: hubris and terror, followed by a fall " and that " It evokes emotions and feelings rare in games ".

* Lower tangent arc, rarely observable halo, an optical phenomenon appearing under and tangent to a 22 ° halo centred around the sun

* Upper tangent arc, halo, an atmospheric optical phenomenon which appears over and tangent to the 22 ° halo centred around the sun

Halo display at the South Pole ( 1980 ), featuring a parhelion, 22 ° halo, parhelic circle, upper tangent arc and Parry arc.

The image also shows a 22 ° halo ( circle ), a parhelic circle ( the curved line extending between and beyond the parhelion and the sun ), an upper tangent arc and a Parry arc.

Observed during eclipse, the sun's chromosphere appears ( briefly ) as a thin pinkish arc, and its corona is seen as a tufted halo.

Lacking telescopes to work with, he increased his accuracy by increasing the length of his sextant ; the so-called Fakhri sextant had a radius of about 36 meters ( 118 ft ) and the optical separability of 180 " ( seconds of arc ).

For example a 1 meter diameter optical telescope is two million times bigger than the wavelength of light observed giving it a resolution of roughly 0. 3 arc seconds, whereas a radio telescope " dish " many times that size may, depending on the wavelength observed, only be able to resolve an object the size of the full moon ( 30 minutes of arc ).

A unique feature of the HETE mission was its capability to localize GRBs with ~ 10 arc second accuracy in near real time aboard the spacecraft, and to transmit these positions directly to a network of receivers at existing ground-based observatories enabling rapid, sensitive follow-up studies in the radio, IR, and optical bands.

They provide protection against debris, the heat from welding, and, with the proper filters, the optical radiation resulting from the welding, which can otherwise cause arc eye.

The normal optical depths of the arcs are estimated to lie in the range 0. 03 – 0. 09 ( 0. 034 ± 0. 005 for the leading edge of Liberté arc as measured by stellar occultation ); the radial widths are approximately the same as those of the continuous ring — about 30 km.

The use of a bare arc tube can allow transmission of UV or precise positioning within the optical system of a luminaire.

LIBS makes use of optical emission spectrometry and is to this extent very similar to arc / spark emission spectroscopy.

Examining the spectrum of the arc of manganese, he determined that the optical spectra of complex atoms consisted of groups of lines – which he called " multipletes "- between which existed certain characteristic regularities.

* Circumhorizontal arc, an atmospheric optical phenomenon

At the same time the stars can be observed to move slightly retrograde, at the rate of about 50 arc seconds per year, a phenomenon known as the “ precession of the equinox ".

A fog-bow is defined as " an infrequently observed meteorological phenomenon ; a faint white, circular arc or complete ring of light that has a radius of 39 degrees and is centered on the antisolar point.

However, Maunder wrote that the phenomenon moved rapidly from horizon to horizon, which would rule out a noctilucent cloud or upper tangent arc.

An infrequently observed meteorological phenomenon ; a faint white, circular arc or complete ring of light that has a radius of 39 degrees and is centered on the antisolar point.

A rainbow is a meteorological phenomenon that appears as a multicolored arc that forms with the sunlight

In act two, a girl named Regan ( Linda Blair ) becomes possessed by a demonic entity ( the problem ), and Karras ' character arc is being forced to accept that there is no rational or scientific explanation for the phenomenon except that she actually is possessed by a demon, which ties in directly with the theme of him losing his faith.

At the end of life, high-pressure sodium lamps exhibit a phenomenon known as cycling, which is caused by a loss of sodium in the arc.

This phenomenon can be seen during warmup, when the arc tube has not yet reached full operating temperature and the halides have not fully vaporized.

Electric arcs were used to provide illumination in the 19th century, but the arc current was unstable and they often produced hissing, humming or howling sounds.

Jon often attempts to ask her out on a date, but rarely succeeds ; however, in an extended story arc from June 19 to July 29, 2006 ( the main event on July 28 ), Liz and Jon kiss.

To avoid confusion, an inverse trigonometric function is often indicated by the prefix " arc ".

They can also be used for collecting powerups and bonuses ; the latter is often arranged in an arc such that the player can collect all of them if the jump is timed right.

Constant current power supplies are most often used for manual welding processes such as gas tungsten arc welding and shielded metal arc welding, because they maintain a relatively constant current even as the voltage varies.

Constant voltage power supplies hold the voltage constant and vary the current, and as a result, are most often used for automated welding processes such as gas metal arc welding, flux cored arc welding, and submerged arc welding.

* Dresden Codak, a webcomic by Aaron Diaz, often contains plots relating to the singularity and transhumanism, especially in the Hob story arc

The radiation source is often a Tungsten filament ( 300-2500 nm ), a deuterium arc lamp, which is continuous over the ultraviolet region ( 190-400 nm ), Xenon arc lamp, which is continuous from 160-2, 000 nm ; or more recently, light emitting diodes ( LED ) for the visible wavelengths.

Iron is sometimes melted in a special type of blast furnace known as a cupola, but more often melted in electric induction furnaces or electric arc furnaces.

Also a character in the series, also one of the JoJos himself, Joseph Joestar is often seen in the end of the each story arc he appears in listening the song from his Walkman.

Obduction often occurs where a small tectonic plate is caught between two larger plates, with the crust ( both island arc and oceanic ) welding onto an adjacent continent as a new terrane.

Note that in the case of an astronomical crescent, such as the moon observed in the sky, the outer arc will be 180 ° ( a half-circle as previously mentioned ), while the Islamic crescent symbol ( Arabic هلال hilāl ) is often shown with an outer arc significantly greater than 180 ° ( as seen in the illustrations below ).

However, in July 1915 the Fokker E. I became operational — this was the first type to enter service with the pioneering example of a " synchronization gear " ( often referred to mistakenly as an " interrupter gear "), the Fokker Stangensteuerung, which enabled a fixed machine gun to fire forwards through the arc of the propeller without striking its blades.

It is commonly believed that this was to avoid recognition by fans, but an alternative reason sometimes given is that they often had red eyes from the powerful arc lamps that were needed due to the extremely slow speed film stocks used.

Varieties, often described by philatelists in French terms, include straight cuts ( percée en lignes, and percée en lignes colorées with inked cutting bar ), arc ( percée en arc ), sawtooth and the serpentine roulettes ( percée en pointe ) used by the early stamps of Finland.

Finite domain solvers are useful for solving constraint satisfaction problems, and are often based on arc consistency or one of its approximations.

It then makes a wide southward arc between the Tibetan and Yunnan-Guizhou Plateaus, dropping into what is often known as the " Grand Canyon of the East " or " China's Grand Canyon ", a-deep gorge that takes it past the Chinese border into northeastern Burma through Shan State and Kayah State,

In vehicles such as tractors and trucks, the tachometer often has other markings, usually a green arc showing the speed range in which the engine produces maximum torque, which is of prime interest to operators of such vehicles.