The Coming Television Revolution

Written by Terry Mitchell

The revolution is just getting started and will begin to make its mark this year. By 2010, it will begin to take off. By 2025, it will berepparttar standard for all TV viewing. It's called Internet Protocol Television, or IPTV for short. IPTV works with a set-top box connected to any broadband interface and to a TV. It will allow users to choose among thousands (and eventually hundreds of thousands) of hours of programming, including movies, sports, classic TV, etc., and download their selections fromrepparttar 133373 internet torepparttar 133374 hard drive ofrepparttar 133375 set-top box. Initially, set-top box hard drives will be able to store up to 300 hours of programming at a time, but capacity will expand asrepparttar 133376 technology becomes more refined. Also, download times will become shorter and shorter as broadband connection speeds become faster and faster. Eventually, a two-hour movie will be fully downloadable in a couple of minutes. Oncerepparttar 133377 programs are downloaded torepparttar 133378 hard drive, they can be viewed onrepparttar 133379 connected TV at any time via a DVR-type interface provided byrepparttar 133380 set-top box. Besidesrepparttar 133381 convenience of an all video-on-demand (VOD) environment, IPTV will provide a much wider range of programming than broadcast, cable, and satellite TV, or even major video chains, could ever provide. Becauserepparttar 133382 programming is available fromrepparttar 133383 internet, it will be almost completely unlimited and unconstrained. Programming from all overrepparttar 133384 world will be available along with every imaginable genre of niche programming. Also, previously unreleased independent films that have been sitting on shelves for years due torepparttar 133385 lack of a distribution source will suddenly become available torepparttar 133386 masses via IPTV. Films that previously could not be made at all will become a reality and be available onrepparttar 133387 IPTV services. Long forgotten films and TV shows will have new life breathed into them by IPTV. To top it all off, much of this programming will be eventually be available in high definition (HDTV)! Most IPTV platforms will be divided into "channels", but notrepparttar 133388 same kind of channels that we have grown accustomed to with traditional TV services. In this case, a "channel" is defined as a division of an IPTV service by individual content provider. Each content provider carried by a given IPTV platform will have its own guidelines for delivering programming on its channel. Some will provide their content for free to everyone who owns a given IPTV product. Some will be subscription based, i.e., everything on their channels will be available for a monthly or annual subscription. Others will be all pay-per-view. Still others will provide a combination of all ofrepparttar 133389 above.

Vacation Break for Electrical Machines

Written by Thomas Yoon

Are you overloaded? Have you become a part ofrepparttar highly stressed modern working environment? You may need a break - a vacation, a change in environment, a change of pace...

Similarly, machines can be overloaded too. Those that were designed for a particular system are often pushed to their limits when new requirements emerge.

Just likerepparttar 133372 final straw that breaksrepparttar 133373 camel's back, electrical machines too, can reach their breaking point. If there is no vacation for them, they will burn.

Fuses and circuit breakers are designed to stoprepparttar 133374 current in a circuit before any damage can occur - create a vacation or a break for them.

A circuit breaker is one ofrepparttar 133375 ways to prevent motors (or other electrical machines) from burning due to overloading. All electrical motors produce heat when running. Atrepparttar 133376 time of a fault, this heat builds up at a much higher rate than it can be dissipated. This can result in damaged equipment, fire or even explosion.

The electrical protective device likerepparttar 133377 circuit breaker is designed to de-energizerepparttar 133378 circuit before this heat level becomes dangerous.

There are basically 2 means of activating a break - thermally (heat) or magnetically.

Thermal circuit breakers make use of bimetallic strips that will bend due torepparttar 133379 different expansion rates of each ofrepparttar 133380 metals in repparttar 133381 strip. The bending ofrepparttar 133382 strip will move a tripping mechanism latch that will then open uprepparttar 133383 contacts ofrepparttar 133384 circuit breaker.

Because bimetallic strips take time to heat up and bend, this type of tripping device is used for tripping prolonged overloaded situations. The setting for breakingrepparttar 133385 circuit at a particular overload value can be adjusted.

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