Transmitter

In electronics and telecommunications a transmitter or radio transmitter is an electronic device which, with the aid of an antenna, produces radio waves. The transmitter itself generates a radio frequency alternating current, which is applied to the antenna. When excited by this alternating current, the antenna radiates radio waves. In addition to their use in broadcasting, transmitters are necessary component parts of many electronic devices that communicate by radio, such as cell phones, wireless computer networks, Bluetooth enabled devices, garage door openers, two-way radios in aircraft, ships, spacecraft, radar sets and navigational beacons. The term transmitter is usually limited to equipment that generates radio waves for communication purposes; or radiolocation, such as radar and navigational transmitters. Generators of radio waves for heating or industrial purposes, such as microwave ovens or diathermy equipment, are not usually called transmitters even though they often have similar circuits.

Transmitter (album)

Initial release by Spiraling. Reviewed on CD Baby as "the best new pop record I have heard in years. Spiraling plays high-energy, rocking pop songs with delicious vocals and awesome lyrics that are damn near impossible not to sing along to."

Personnel

Track listing

List of knot terminology

This page explains commonly used terms related to knots.

B

Bend

A bend is a knot used to join two lengths of rope.

Bight

A bight has two meanings in knotting. It can mean either any central part of a rope (between the standing end and the working end) or an arc in a rope that is at least as wide as a semicircle. In either case, a bight is a length of rope that does not cross itself. Knots that can be tied without use of the working end are called knots on the bight.

Binding knot

Binding knots are knots that either constrict a single object or hold two objects snugly together. Whippings, seizings and lashings serve a similar purpose to binding knots, but contain too many wraps to be properly called a knot. In binding knots, the ends of rope are either joined together or tucked under the turns of the knot.

Bitter end

Another term for the working end.

C

Capsizing

A knot that has capsized has deformed into a different structure. Although capsizing is sometimes the result of incorrect tying or misuse, it can also be done purposefully in certain cases to strengthen the knot (see the carrick bend).

Jamming (physics)

Jamming is the physical process by which some materials, such as granular materials, glasses, foams, and other complex fluids, become rigid with increasing density. The jamming transition has been proposed as a new type of phase transition, with similarities to a glass transition but very different from the formation of crystalline solids.

While a glass transition occurs when the liquid state is cooled, the jamming transition happens when density is increased. This crowding of the constituent particles prevents them from exploring phase space, making the aggregate material behave as a solid. The system may be able to unjam if the temperature is increased, or external stresses are applied.

The jamming phase diagram relates the jamming transition to inverse density, stress and temperature.

The density at which systems jam is determined by many factors, including the shape of their components, the deformability of the particles, frictional interparticle forces, and the degree of dispersity of the system. The overall shape of the jamming manifold may depend on the particular system. For example, a particularly interesting feature of the jamming transition is the difference between attractive and repulsive systems. Whether the jamming surface diverges for high enough densities or low temperatures is uncertain.

Jamming (song)

"Jamming" is a song by the reggae band Bob Marley & the Wailers from their 1977 album Exodus. The song also appears on the compilation album Legend. The song was re-released 10 years later as a tribute to Bob Marley and was again a hit, as in the Netherlands, where it was classified in the charts for 4 weeks. In Jamaican patois the word jamming refers to a getting together or celebration. It is still receiving moderate airplay from adult alternative stations.

Bob Marley's wife Rita Marley has performed the song during the tribute concert "Marley Magic: Live In Central Park At Summerstage". Marley's children "Ziggy Marley and the Melody Makers" have performed the song during their concerts. Their live version of the song appears on the concert CD/DVDs "Live Vol. 1" and "Ziggy Marley and the Melody Makers Live".

In popular culture

QED

QED may refer to:

Mathematics,Science and technology

Entertainment and media

Television and film

Music

QED: The Strange Theory of Light and Matter

QED: The Strange Theory of Light and Matter (1985) is an adaptation for the general reader of four lectures on quantum electrodynamics (QED) by Richard Feynman (1918-1988).

QED was designed to be a popular science book, written in a witty style, and containing just enough quantum-mechanical mathematics to allow the solving of very basic problems in quantum electrodynamics by an educated lay audience. It is unusual for a popular science book in the level of mathematical detail it goes into, actually allowing the reader to solve simple optics problems, as might be found in an actual textbook. But unlike in a typical textbook, the mathematics is taught in very simple terms, with no attempt to solve problems efficiently, use standard terminology, or facilitate further advancement in the field. The focus instead is on nurturing a basic conceptual understanding of what is really going on in such calculations. Complex numbers are taught, for instance, by asking the reader to imagine that there are tiny clocks attached to subatomic particles. The book was first published in 1985 by the Princeton University Press.