# Diccionario Técnico

## Definiciones con H

H beam: A beam similar to the I beam but with longer flanges. Also known as wide-flange beam.

H bit: A core bit manufactured and used in Canada having inside and outside diameters of 2.875 and 3.875 inches (73.025 and 98.425 millimeters), respectively, the matching reaming shell has an outside diameter of 3.906 inches (99.2124 millimeters).

H pile: A steel pile that is H-shaped in section.

H rod: A drill rod having an outside diameter of 3-½ inches (8.89 centimeters).

H variometer: NULL

Haber process: NULL

Haber-Bosch process: Early nitrogen-fixation process for production of ammonia from hydrogen and nitrogen, catalyzed by iron, now replaced by more efficient ammonia synthesis processes. Also known as Haber process.

Halsey premium plan: A wage-incentive plan which sets a guaranteed daily rate to an employee and provides for predetermined compensation for superior performance.

Hall cyclic thermal reforming: A gas-making process that uses component parts of carbureted-water gas apparatus to generate high-Btu gas from feedstocks ranging from naphtha to Bunker C.

Hall-effect gaussmeter: A gaussmeter that consists of a thin piece of silicon or other semiconductor material which is inserted between the poles of a magnet to measure the magnetic field strength by means of the Hall effect.

Hall-plate device: A sensor that uses the Hall effect to measure magnetic field strength.

Hamilton-Jacobi theory: A theory that provides a means for discussing the motion of a dynamic system in terms of a single partial differential equation of the first order, the Hamilton-Jacobi equation.

Hamilton's equations of motion: A set of first-order, highly symmetrical equations describing the motion of a classical dynamical system, namely &qdot;j = dH/dpj, &pdot;j = -dH/dqj

Hamilton's principle: A variational principle which states that the path of a conservative system in configuration space between two configurations is such that the integral of the Lagrangian function over time is a minimum or maximum relative to nearby paths between the same

Hamiltonian function: A function of the generalized coordinates and momenta of a system, equal in value to the sum over the coordinates of the product of the generalized momentum corresponding to the coordinate, and the coordinate's time derivative, minus the Lagrangian of the

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European Desalination Society
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The International Desalination Association (IDA)