A directional antenna that is composed of long-wire radiators that form the sides of a rhombus, the two halves of which are fed equally in opposite phase at one apex. [From Weik '89]
Note: A rhombic antenna is usually terminated at the apex opposite the driven apex, which termination makes its radiation pattern unidirectional. It is bidirectional if the opposite… (Read More →)

Abbreviation for routing indicator.

Recording Industry Association of America

1. Any cable constructed as a ribbon with parallel elements.
2. A fiber optic cable in which the optical fibers are held in grooves and laminated within a flat semirigid strip of material, such as plastic, that positions, holds, and protects them.
Note: Ribbon cables may be stacked to produce fiber optic cables with large numbers of fibers. Buffers, strength… (Read More →)

An elliptically or circularly polarized wave, in which the electric field vector, observed in any fixed plane, normal to the direction of propagation, whilst looking in the direction of propagation, rotates with time in a right-hand or clockwise direction. [NTIA] [RR] Synonym clockwise polarized wave.

Synonym Fleming's rule.

The ability to perform a pre-defined set of utilization functions on a content item. These utilization functions are the permissions (e.g., to view/hear, copy, modify, record, excerpt, sample, translate in another language, keep for a certain period, distribute. ), constraints (e.g., pay/view/hear multiple times, play/view/hear certain number of hours), and obligations (e.g., payment, tracking, information) that apply to the content… (Read More →)

The statement of utilization functions that can be performed on a Content Item and the conditions in which they can be performed.

Indicates the entity that is entitled to grant rights.

1. In telephony, a signal of specific duration and character that indicates to a user (customer, subscriber) that a calling party is engaged in an access attempt.
2. Synonym ring network. See network topology.