# Jo

**Joint**- Interface between two parts.
**Joint Angle Limits**- The limits, set in the input, on the driveline joint angles through the critical range, to control feasible driveline geometry.
**Joint Probability**- The probability of two or more events happening at the same time.
**Joint Time Frequency Analysis**- A method of analysis that simultaneously provides both time and frequency information.
**Joint Variation**- A variation in which the values of one variable depend upon those of 2 or more variables.
**Joist**- Horizontal wood framing member set from wall to wall to support the boards of a floor or ceiling.
**Joist Hanger**- A metal stirrup that supports the ends of joists so that they are flush with the girder.
**Jominy Test**- The Jominy test is used for determining end-quench hardenability.
**Jordan Curve**- A simple closed curve.
**Jordan Matrix**- A matrix whose diagonal elements are all equal (and nonzero) and whose elements above the principal diagonal are equal to 1, but all other elements are 0.
**Josephson Effects**- Electrical effects observed when two superconducting materials are separated by a thin layer of insulating material.
**Joule**- The SI unit of energy.
**Joule Cycle**- The thermodynamic cycle of the gas turbine engine.
**Joule, James Prescott**- English physicist; determined the mechanical equivalent of heat; proposed Joule′s Law which describes the rate at which heat is produced by an electric current.
**Joules Laws**- Describe the heat produced when a current flows through a resistance and the internal energy of an ideal gas.
**Jounce**- Wheel travel upward from design load position.
**Jounce Stop**- A mechanical limit to vertical wheel travel.
**Journal Bearing**- A machine part in which a rotating shaft revolves or slides.
**Journal of the Acoustical Society of America**- The leading source of theoretical and experimental research results in the broad interdisciplinary subject of sound.