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The International Time Bureau ( BIH ) began a time scale, T m or AM, in July 1955, using both local caesium clocks and comparisons to distant clocks using the phase of VLF radio signals.

Algeria has always been a source of inspiration for different painters who tried to immortalize the prodigious diversity of the sites it offers and the profusion of the facets that passes its population, which offers for Orientalists between the 19 th century and the 20 th century, a striking inspiration for a very rich artistic creation like Eugène Delacroix with his famous painting women of Algiers in their apartment or Etienne Dinet or other painters of world fame like Pablo Picasso with his painting women of Algiers, or painters issued from the Algiers school.

All 128 ASCII characters, including non-printable characters ( represented by their abbreviations ). The 95 ASCII graphic characters are numbered from 20 hexadecimal | hex to 7E hexadecimal | hex ( decimal 32 to 126 ).

The " space " character had to come before graphics to make sorting easier, so it became position 20 hex ; for the same reason, many special signs commonly used as separators were placed before digits.

To keep options available for lower case letters and other graphics, the special and numeric codes were arranged before the letters, and the letter " A " was placed in position 41 hex to match the draft of the corresponding British standard.

The @ symbol was not used in continental Europe and the committee expected it would be replaced by an accented À in the French variation, so the @ was placed in position 40 hex next to the letter A.

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Alphabets: Armenian alphabet | Armenian , Cyrillic | Cyrillic , Georgian alphabet | Georgian , Greek alphabet | Greek , Latin script | Latin , Latin ( and Arabic script | Arabic ) , Latin and Cyrillic Abjads: Arabic script | Arabic , Hebrew alphabet | Hebrew Abugidas: Indic scripts | North Indic , Indic scripts | South Indic , Ge ' ez script | Ge ' ez , Tāna , Canadian Aboriginal syllabics | Canadian Syllabic and Latin Logographic + syllabic: Pure logographic , Mixed logographic and syllabaries , Featural-alphabetic syllabary + limited logographic , Featural-alphabetic syllabary

< and steel

* Calcium carbonate ( CaCO 3 ) is used in manufacturing cement and mortar, lime, limestone ( usually used in the steel industry ) and aids in production in the glass industry.

The facility is 38, 690 meters 2 ( 416, 500 ft 2 ), equivalent to 4½ Canadian football fields, and the operating structure is the largest stainless steel building in North America, the size of 14 NHL rinks.

About 95 % of the depleted uranium produced is stored as uranium hexafluoride, a crystalline solid, ( D ) UF 6 , in steel cylinders in open air storage yards close to enrichment plants.

C v ( steel )= 0. 1 cal / g. K

Electric current is used to strike an arc between the base material and consumable electrode rod, which is made of steel and is covered with a flux that protects the weld area from oxidation and contamination by producing carbon dioxide ( CO 2 ) gas during the welding process.

When the cement paste exposed to the air and meteoric water reacts with the atmospheric CO 2 , portlandite and the Calcium Silicate Hydrate ( CSH ) of the hardened cement paste become progressively carbonated and the high pH gradually decreases from 13. 5 – 12. 5 to 8. 5, the pH of water in equilibrium with calcite ( calcium carbonate ) and the steel is no longer passivated.

The nitrite anion is a mild oxidizer that oxidizes the soluble and mobile ferrous ions ( Fe 2 +) present at the surface of the corroding steel and causes it to precipitate as an insoluble ferric hydroxide ( Fe ( OH ) 3 ).

Because the stainless steel fuel cladding has a higher neutron capture cross section than Magnox fuel cans, enriched uranium fuel is needed, with the benefit of higher " burn ups " of 18, 000 MW t - days per tonne of fuel, requiring less frequent refuelling.

They can be made from many different materials, including: stainless steel, chrome steel, and ceramic ( silicon nitride ( Si 3 N 4 )).

MoS 2 particles can be shear-welded on steel surface and some engine components were even treated with MoS 2 layer during manufacture, namely liners in engines.

When exposed to the atmosphere, the pure zinc ( Zn ) reacts with oxygen ( O 2 ) to form zinc oxide ( ZnO ), which further reacts with carbon dioxide ( CO 2 ) to form zinc carbonate ( ZnCO 3 ), a usually dull grey, fairly strong material that stops further corrosion in many circumstances, protecting the steel below from the elements.

1 A family of AC hysteresis loops for grain-oriented electrical steel ( B R denotes remanence and H C is the coercivity ).

A family of hysteresis loops for grain-oriented electrical steel ( B R denotes remanence and H C is the coercivity ).

Birra Tirana began to compete successfully in market and its financial condition began to improve, creating such incomes, that not only liquidate in the state budget the fund about 100, 000ECU, but even accomplishing further investments with machinery in Germany, for the filling line, packing, grinding, CO 2 gas, filtration, furnaces, compressors for refrigeration, and even the lines of circulation of the beer and brine, all in steel.

The foundation for the stadium was created out of cast concrete and 600, 000 m 3 of packed slag, a waste product from the steel smelting industry.

< and shrapnel

< center > Animation of a bursting shrapnel shell </ center >

< center > 1870s cast-iron British ordnance terms # RML | RML 16-pounder " Boxer " shrapnel shell showing limited space for bullets

< and shells

The most common are calcite or calcium carbonate, CaCO 3 , the chief constituent of limestone ( as well as the main component of mollusc shells and coral skeletons ); dolomite, a calcium-magnesium carbonate CaMg ( CO 3 ) 2 ; and siderite, or iron ( II ) carbonate, FeCO 3 , an important iron ore.

The In 3 + ion is colorless in solution because of the absence of unpaired electrons in the d-and f-electron shells.

The Ancient Egyptians covered the faces of pyramids with polished white limestone, containing great quantities of fossilized seashells .< ref > Viegas, J., Pyramids packed with fossil shells, ABC News in Science, < www. abc. net. au / science / articles / 2008 / 04 / 28 / 2229383. htm ></ ref > Many of the facing stones have fallen or have been removed and used to build the mosques of Cairo.

Strabo ... enters largely, in the Second Book of his Geography, into the opinions of Eratosthenes and other Greeks on one of the most difficult problems in geology, viz., by what causes marine shells came to be plentifully buried in the earth at such great elevations and distances from the sea .

* In some Unix shells and Windows PowerShell, the < tt >;</ tt > ( semicolon ) character is a statement separator.

Most Unix-like systems continue to have < tt >/ bin / sh </ tt >— which will be the Bourne shell, or a symbolic link or hard link to a compatible shell — even when other shells are used by most users.

In most DOS and UNIX command shells, as well as in the Microsoft Windows command line interpreters cmd. exe and Windows PowerShell, the working directory can be changed by using the < tt > cd </ tt > or < tt > chdir </ tt > commands.

In Unix shells, the < tt > pwd </ tt > command outputs the absolute pathname of the current working directory ; the equivalent command in DOS and Windows is < tt > cd </ tt > without arguments ( whereas in Unix, < tt > cd </ tt > used without arguments takes the user back to his / her home directory ).

The environment variable < tt > PWD </ tt > ( in Unix / Linux shells ) or < tt > CD </ tt > ( in DOS / Windows shells ) is also set for use in scripts, so that one need not start an external program.

Analysis of the ratio of 18 O to 16 O in the shells of the Colorado Delta clam was used to assess the historical extent of the estuary in the Colorado River Delta prior to construction of upstream dams.

Organisms such as foraminifera which combine oxygen dissolved in the surrounding water with carbon and calcium to build their shells therefore incorporate the temperature-dependent 18 O to 16 O ratio.

Shallow marine waters are generally supersaturated in calcite, CaCO 3 , so as marine organisms ( which often have shells made of calcite or its polymorph, aragonite ) die, they will tend to fall downwards without dissolving.

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