Discrete cosine transform

A discrete cosine transform (DCT) expresses a finite sequence of data points in terms of a sum of cosine functions oscillating at different frequencies. DCTs are important to numerous applications in science and engineering, from lossy compression of audio (e.g. MP3) and images (e.g. JPEG) (where small high-frequency components can be discarded), to spectral methods for the numerical solution of partial differential equations. The use of cosine rather than sine functions is critical for compression, since it turns out (as described below) that fewer cosine functions are needed to approximate a typical signal, whereas for differential equations the cosines express a particular choice of boundary conditions.

In particular, a DCT is a Fourier-related transform similar to the discrete Fourier transform (DFT), but using only real numbers. DCTs are equivalent to DFTs of roughly twice the length, operating on real data with even symmetry (since the Fourier transform of a real and even function is real and even), where in some variants the input and/or output data are shifted by half a sample. There are eight standard DCT variants, of which four are common.

Motorola DCT6412

The Motorola DCT6412 is a dual tuner HDTV DVR by Motorola deployed by the following companies:

In the United States, the DCT6412 is generally owned by the cable company and rented to cable subscribers. Some US cable companies lease the DCT6412 to all of their HDTV customers, regardless of whether they have paid to enable DVR service or not.

Motorola DCT3412

The Motorola DCT3412 is a digital-tuner only version of the Motorola DCT6412 HDTV DVR. It is similar to the 6412 Phase III, except that it is unable to tune in analog channels. It is only used on systems that have analog-digital simulcasting (ADS) active.

The 3412 is about the same width and height as the 6412, but is not as deep (about 11 inches, versus 13 inches on the 6412). On the front it has no SmartCard slot, no A/V input, and no USB port (there is still one USB port on the back). On the back, there are no A/V inputs and no metal cover where the RF Input connector is.

The 3412 can record two SD digital or HDTV channels at once and play back a recorded show at the same time. The 3412 has a 120 GB hard drive giving it an HDTV recording time of 12–20 hours and about 60 to 90 hours of SD digital TV. A similar model 3416 has a 160 GB drive.

The Motorola DCT3080 is similar to the 3412, but has an 80 gigabyte hard drive and no HD circuitry. It can receive and record HD programming, but can only output 480i.

Frame (GUI)

A frame, or group box, is a type of box within which a collection of graphical control elements can be grouped as a way to show relationships visually, either because the items are functionally related (such as a radio button), or because they apply to related objects.

In HTML (where frame has another meaning, referring to an individually scrollable portion of a page), this kind of grouping box is called a fieldset after the HTML element of the same name.

In the image to the right, the top frame has no title. The two frames below have titles, and a radio button outside them, presumably to select one or the other. The lower of the two boxes is dimmed, or disabled, indicating its widgets cannot be selected. Note that each of the frames (as well as the area outside of the frames) has a checked radio button, while normally only one of the buttons can be selected.

Note that any widget, including nested frames, can be placed inside of a frame, not merely radio buttons.

References

Frame (dance)

Frame is the body shape maintained by dancers during partner dancing. Specifically, frame refers to the shape of the upper body of the dancers relative to the rest of the dancer's body and the body of the dancer's partner.

The frame provides connection between the dance partners, making leading and following possible. A frame is a stable structural combination of both bodies maintained through the dancers' arms and/or legs, and allows the leader to transmit body movement to the follower, and for the follower to suggest ideas to the leader.

Connection occurs in both open and closed dance positions (also called "open frame" and "closed frame"). It is essential in most partner dances, but especially so in modern ballroom dance.

The required frame varies according to the dance—in street Latin style dances such as salsa, arms are held more loosely.

References

Locomotive frame

A locomotive frame is the structure that forms the backbone of the railway locomotive, giving it strength and supporting the superstructure elements such as a cab, boiler or bodywork. The vast majority of locomotives have had a frame structure of some kind. The frame may in turn be supported by axles directly attached to it, or it may be mounted on bogies (UK) / trucks (US), or a combination of the two. The bogies in turn will have frames of their own.

Types of frame

Three main types of frame on steam locomotives may be distinguished:

Plate frames

These used steel plates about 1–2 in (25.4–50.8 mm) thick. They were mainly used in Britain and continental Europe. On most locomotives the frames would be situated within the driving wheels ("inside frames"), but some classes of early steam locomotive and diesel shunters were constructed with "outside frames". Some early designs were double framed where the frame consisted of plates both inside and outside the driving wheels. Others were sandwich frames where the frame was constructed of wood sandwiched between two metal plates.

Empty

Empty may refer to:

Music

Albums

Songs

Other

See also