• hydraulics
  • The branch of science and technology concerned with the mechanics of fluids, especially liquids.
Abstract from DBPedia
    Hydraulics (from Greek: Υδραυλική) is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counterpart of pneumatics, which concerns gases. Fluid mechanics provides the theoretical foundation for hydraulics, which focuses on the applied engineering using the properties of fluids. In its fluid power applications, hydraulics is used for the generation, control, and transmission of power by the use of pressurized liquids. Hydraulic topics range through some parts of science and most of engineering modules, and cover concepts such as pipe flow, dam design, fluidics and fluid control circuitry. The principles of hydraulics are in use naturally in the human body within the vascular system and erectile tissue.Free surface hydraulics is the branch of hydraulics dealing with free surface flow, such as occurring in rivers, canals, lakes, estuaries and seas. Its sub-field open-channel flow studies the flow in open channels. The word "hydraulics" originates from the Greek word ὑδραυλικός (hydraulikos) which in turn originates from ὕδωρ (hydor, Greek for water) and αὐλός (aulos, meaning pipe).

    水理学(すいりがく、英語: hydraulics)とは、水の流れに関する力学を研究する学問である。水力学(すいりきがく、英語: hydrodynamics)とほぼ同じ学問であるが、で述べるように、歴史的・伝統的、その他の理由により両者は区別される。

    (Source: http://dbpedia.org/resource/Hydraulics)