It is uncertain where it was first discovered that a combination of hydrated non-hydraulic lime and a pozzolan produces a hydraulic mixture ( see also: Pozzolanic reaction ), but concrete made from such mixtures was first used by the Ancient Macedonians and three centuries later on a large scale by Roman engineers.

Modern hydraulic cements began to be developed from the start of the Industrial Revolution ( around 1800 ), driven by three main needs:

The Corporation agreed to his suggestion, and the experiment proved so successful that three more hydraulic cranes were installed on the Quayside.

Around 2011, three new plants are opening on the east side of town to process sand for hydraulic fracturing of oil and gas wells.

Warde-Aldam thought that such a system could carry 45, 000 tons of coal per year, and £ 13, 382 was allocated for three train boats, a hoist, and hydraulic machinery to control the hoist and the lock into the docks.

It was next scheduled for 4 November, but was again scrubbed when high oil pressures were discovered in two of the three Auxiliary Power Units ( APU ) that controlled the orbiter's hydraulic system.

Most bicycle brake systems consist of three main components: a mechanism for the rider to apply the brakes, such as brake levers or pedals ; a mechanism for transmitting that signal, such as Bowden cables, hydraulic hoses, rods, or the bicycle chain ; and the brake mechanism itself, a calliper or drum, to press two or more surfaces together in order to convert, via friction, kinetic energy of the bike and rider into thermal energy to be dissipated.

The village of Pewaukee is home to one of the three locations of Dynex / Rivett Inc. Dynex manufactures hydraulic components and systems for use on mobile and industrial machinery.

There are also three elevators, one of which was powered by a rare horizontal hydraulic elevator piston.

The missile struck the left wing, disabling all three hydraulic systems and setting the wing on fire.

Two sections of interior stands are fitted with large hydraulic lifts which can lift the seating elements forty-five degrees into the air, creating room for five volleyball courts or three basketball courts.

Alco built three hydraulic drive locomotives for Southern Pacific in 1964.

The manner in which the engine failed resulted in high-speed shrapnel being hurled from the engine ; this shrapnel penetrated the hydraulic lines of all three independent hydraulic systems on board the aircraft, which rapidly lost their hydraulic fluid.

This shrapnel punctured the lines of all three hydraulic systems, allowing the fluid to rapidly drain away.

Dvorak discovered that the pressure gauges and quantity gauges on his instrument panel for the three hydraulic systems were registering zero, and reported this to Haynes.

Damage to N1819U's three hydraulic systems

Following the UAL 232 accident, such fuses were installed in the number 3 hydraulic system in the area below the number 2 engine on all DC-10 aircraft to ensure sufficient control capability remained if all three hydraulic system lines should be damaged in the tail area.

It is still possible to lose all three hydraulic systems if serious damage occurs elsewhere, as nearly happened to a cargo airliner in 2002 during takeoff when a main gear tire exploded in the wheel well area.

DC-10s still have no fuse protection for any of the three hydraulic systems in the event of an exploding main gear tire.

The odds against all three hydraulic systems failing simultaneously had previously been calculated as high as a billion to one.

( In less formal treatments, all three systems are commonly called alphabets.

One of the major human habitations is Sjandra Kei, three systems comprising roughly 28bn individuals.

In three dimensions, common alternative coordinate systems include cylindrical coordinates and spherical coordinates.

In principle all three color encoding systems can be combined with any scan line / frame rate combination.

Bistability can only arise in biological and chemical systems if three necessary conditions are fulfilled: positive feedback, a mechanism to filter out small stimuli and a mechanism to prevent explosions.

Non-Trinitarianism includes all Christian belief systems that reject, wholly or partly, the doctrine of the Trinity, namely, the teaching that God is three distinct yet coeternal and coequal hypostases who are indivisibly united in one essence.

A few other computers have used more exotic numeral systems like ternary ( base three ).

Practical computer systems divide software systems into three major classes: system software, programming software and application software, although the distinction is arbitrary, and often blurred.

People who use modern general purpose computers ( as opposed to embedded systems, analog computers and supercomputers ) usually see three layers of software performing a variety of tasks: platform, application, and user software.

However, there are three important factors that set aside monarchies such as the United Kingdom from systems where greater power might otherwise rest with Parliament.

Today speakers of Chinese use three numeral systems:

Computer systems generally consist of three main parts, the central processing unit ( CPU ) to process data, main memory to hold the data to be processed, and a variety of peripherals to communicate that data with the outside world.

There are three hospital systems within the city and six hospitals with a total of 1, 105 beds.

In most calendar systems, the date consists of three parts: the day of month, month, and the year.

The two systems differ only in the scale of two out of the three base units ( centimetre versus metre and gram versus kilogram, respectively ), while the third unit ( second as the unit of time ) is the same in both systems.

The definitions of all derived units in terms of the three base units are therefore the same in both systems, and there is an unambiguous one-to-one correspondence of derived units:

All of the known temperate phages employ one of only three different systems for their lysogenic cycle: lambda-like integration / excision, Mu-like transposition or the plasmid-like partitioning of phage N15.

when presented as guidelines for a philosophy of change, not as dogmatic percepts true by fiat, the three classical laws of dialectics embody a holistic vision that views change as interaction among components of complete systems, and sees the components themselves not as a priori entities, but as both products and inputs to the system.

For Bachelard, rationalism makes equal reference to all three systems of thinking.

Although the Fortune Deck works as a randomizer, the results obtained by it are entirely arbitrary and subjective, and the GM's absolute power over the game is further emphasized by the three resolution systems: Karma ( the higher character ability wins, modified by situation ), Drama ( the GM decides what happens, by what they think most appropriate ), and Fortune ( more or less the same as the above, with interpretation flavored by a card draw ).

It was 15 years before the personal computer became familiar to the general public, and three decades before most people encountered attempts at natural language processing in Internet services like Ask. com or PC help systems such as Microsoft Office Clippy.

They found that the three systems reinforced each other well, leading to better development, and did not mutually contradict.

Over the past three decades ECMWF's activities and wide-ranging programme of research and development have played a pioneering role in the remarkable advancement of weather forecasting and data assimilation systems.