A signal that carries a bit pattern sent by a data station to inform the other stations that they must not transmit.
Note 1: In carrier-sense multiple access with collision detection (CSMA/CD) networks, the jam signal indicates that a collision has occurred.
Note 2: In carrier-sense multiple access with collision avoidance (CSMA/CA) networks, the jam signal indicates that the sending… (Read More →)

The deliberate radiation, reradiation, or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices, equipment, or systems.

The level of interference (jamming) that a system is able to accept and still maintain a specified level of performance, such as maintain a specified bit-error ratio even though the signal-to-noise ratio is decreasing. [From Weik '89]

The ratio, usually expressed in dB, of the power of a jamming signal to that of a desired signal at a given point such as the antenna terminals of a receiver.

A small application-program component that typically executes in a client's Web browser, but can execute in a variety of other simple applications or devices; Java applets support the applet programming model and may be downloaded through the Internet via a Web site and run directly on a remote computer; Java applets are often used to create Web page effects.

An industry standard for database-independent connectivity between a computer platform or device operating in the JavaTM environment and a wide range of databases; the JDBCTM provides a call-level API (application program interface) for SQL-based (structured-query-language based) database access.

A portable, platform-independent, reusable component model that conforms to specification defining how Java objects interact.

A trademarked set of programming language technologies for creating and safely running software programs in both stand-alone and networked environments. Most graphics-based Web browsers can recognize and run Java codes.

Abbreviation for Java database connectivity.

A jeopardy condition exists when the forecasted and/or actual demand for NXX resources in a particular NPA will exceed the known supply during the planning/implementation interval for NPA relief planning