An innovation of the PAL was the generic array logic device, or GAL, invented by Lattice Semiconductor. This device has the same logical properties as the PAL but can be erased and reprogrammed. The GAL is very useful in the prototyping stage of a design, when any bugs in the logic can be corrected by reprogramming. GALs are programmed and reprogrammed using a PAL programmer. A similar device called a PEEL (programmable electrically erasable logic) was introduced by th ...

See also:

Programmable logic device, Programmable logic device - Using a ROM as a PLD, Programmable logic device - Early programmable logic, Programmable logic device - GALs, Programmable logic device - CPLDs, Programmable logic device - FPGAs, Programmable logic device - Other types of PLDs, Programmable logic device - How PLDs remember their configuration, Programmable logic device - PLD programming languages

Read more here: » Programmable logic device: Encyclopedia II - Programmable logic device - GALs

There are many types of IUDs worldwide, but only two types currently available in the United States: the copper-T intrauterine device (IUD) and the levonorgestrel-releasing intrauterine system (LNG IUS). The copper-T IUD is marketed as ParaGard® T 380A by FEI Women’s Health LLC. It was approved by the Food and Drug Administration (FDA) in 1984 and became available for use in 1988. The device consists of a T-shaped polyethylene frame that is wound with copper wire around the vertical stem and has copper bands on the lateral arms. The ParaGard T 380A is approved for up to 10 years of use, although limited ...

See also:

Intrauterine device, Intrauterine device - Types of IUDs, Intrauterine device - Effectiveness, Intrauterine device - Side-effects, Intrauterine device - Common Myths About IUDs, Intrauterine device - Use as Emergency Contraception

Read more here: » Intrauterine device: Encyclopedia II - Intrauterine device - Types of IUDs

All ULDs are identified by their ULD number. A three-letter prefix identifies its type, followed by a 4 or 5 digit serial number to uniquely identify it from others of the same type, and ending with a two character (alpha-numerical) suffix identifying the ULD's owner (if an airline, same as IATA designator codes). For example, AKN 12345 DL means the ULD is a forkliftable LD3 with unique num ...

See also:

Unit Load Device, Unit Load Device - Types, Unit Load Device - Aircraft compatibility, Unit Load Device - ULD capacity, Unit Load Device - Identification, Unit Load Device - Common prefixes, Unit Load Device - Miscellaneous info

Read more here: » Unit Load Device: Encyclopedia II - Unit Load Device - Identification

PALs and GALs are available only in small sizes, equivalent to a few hundred logic gates. For bigger logic circuits, complex PLDs or CPLDs can be used. These contain the equivalent of several PALs linked by programmable interconnections, all in one integrated circuit. CPLDs can replace thousands, or even hundreds of thousands, of logic gates. Some CPLDs are programmed using a PAL programmer, but this method becomes inconvenient for devices with hundreds of pins. A second method of programming is to solder the device to its printed cir ...

See also:

Programmable logic device, Programmable logic device - Using a ROM as a PLD, Programmable logic device - Early programmable logic, Programmable logic device - GALs, Programmable logic device - CPLDs, Programmable logic device - FPGAs, Programmable logic device - Other types of PLDs, Programmable logic device - How PLDs remember their configuration, Programmable logic device - PLD programming languages

Read more here: » Programmable logic device: Encyclopedia II - Programmable logic device - CPLDs

Copper IUDs may make menstrual periods heavier or more painful in some women, especially for the first few months after they are inserted, but modern types such as the GyneFix have been designed so that they usually do not affect periods (compare with IUS). IUDs have remained unpopular in the USA since the Dalkon Shield IUD was banned after being linked to several deaths (by making women more likely to contract uterine infections which can occasionally be fatal) and this was sensationalised in the press. Modern IUDs, howe ...

See also:

Intrauterine device, Intrauterine device - Types of IUDs, Intrauterine device - Effectiveness, Intrauterine device - Side-effects, Intrauterine device - Common Myths About IUDs, Intrauterine device - Use as Emergency Contraception

Read more here: » Intrauterine device: Encyclopedia II - Intrauterine device - Side-effects

While PALs were busy developing into GALs and CPLDs (all discussed above), a separate stream of development was happening. This type of device is based on gate-array technology and is called the field-programmable gate array (FPGA). An early example of an FPGA is the 82s100 by Signetics introduced in the late 1970s. FPGAs use a grid of logic gates, similar to that of an ordinary gate array, but the programming is done by the customer, not by the manufacturer. The term "field-programmable ...

See also:

Programmable logic device, Programmable logic device - Using a ROM as a PLD, Programmable logic device - Early programmable logic, Programmable logic device - GALs, Programmable logic device - CPLDs, Programmable logic device - FPGAs, Programmable logic device - Other types of PLDs, Programmable logic device - How PLDs remember their configuration, Programmable logic device - PLD programming languages

Read more here: » Programmable logic device: Encyclopedia II - Programmable logic device - FPGAs

The French enseigne indicates its essential connection with what is known in English as a flag and in France banners not infrequently took the place of signs or sign boards in the middle ages. Signs, however, are best known in the form of painted or carved advertisements for shops, inns, etc. They are one of various emblematic methods used from time immemorial for publicly calling attention to the place to which they refer. The ancient Egyptians and Greeks are known to have used signs, and many Roman examples are preserved, amo ...

See also:

Sign display device, Sign display device - History, Sign display device - Modern signs, Sign display device - Sign uses, Sign display device - Commercial signs, Sign display device - Informational signs, Sign display device - Directional signs, Sign display device - Regulatory signs, Sign display device - Warning signs, Sign display device - Accessibility signs, Sign display device - Sign technologies, Sign display device - Neon signs, Sign display device - LED signs

Read more here: » Sign display device: Encyclopedia II - Sign display device - History

The photograph depicts the internal mechanism of an RCD. The device pictured is designed to be wired in-line in an appliance flex. It is rated to carry a maximum current of 13 amperes and is designed to trip on a leakage current of 30 mA. This is an active RCD, that is it doesn't latch mechanically and therefore trips out on power failure, a useful feature for equipment that could be dangerous on unexpected re-energisation. The incoming supply live (US: phase |hot ) and the grounded neutral conductors are connected to the terminals at ...

See also:

Residual-current device, Residual-current device - Operation, Residual-current device - Example, Residual-current device - Use, Residual-current device - Limitations, Residual-current device - Types

Read more here: » Residual-current device: Encyclopedia II - Residual-current device - Example

Single phase RCDs operate by measuring the current balance between two conductors using a differential current transformer, and operating the device's contacts if there is a balance fault (i.e. a difference in current between the phase conductor and the neutral conductor). More generally (single phase, three phase, etc.) RCDs operate by detecting a nonzero sum of currents, i.e. the current in the "hot" or "hots" plus that in the "neutral" must equal zero (within some small tolerance), otherwise there is a leakage of current to somewhere else ...

See also:

Residual-current device, Residual-current device - Operation, Residual-current device - Example, Residual-current device - Use, Residual-current device - Limitations, Residual-current device - Types

Read more here: » Residual-current device: Encyclopedia II - Residual-current device - Operation

In most houses, only some (if any) circuits are protected by RCDs. German law, for example, requires the installation of RCDs only for circuits leading to bathrooms (due to the highly increased danger of leakage currents when operating electrical devices in a wet environment: a hair dryer falling into a bathtub might otherwise be fatal). US law (the National Electrical Code) requires RCDs in bathrooms, kitchens, garages, exterior areas, crawl spaces, unfinished basements, near wet bars, swimming pools, and spas. Additionally, it might be a g ...

See also:

Residual-current device, Residual-current device - Operation, Residual-current device - Example, Residual-current device - Use, Residual-current device - Limitations, Residual-current device - Types

Read more here: » Residual-current device: Encyclopedia II - Residual-current device - Use

In Europe RCDs can fit on the same DIN rail as the MCBs, however the busbar arrangements in consumer units and distribution boards can make it awkward to use them in this way. If it is desired to protect an individual circuit an RCBO (Residual-current Circuit Breaker with Overcurrent protection) can be used. This incorporates an RCD and a miniature circuit breaker in one device. It is common to install an RCD in a consumer unit in what is known as a split load configuration where one group of circuits is just on the main switch (or time delay RCD in t ...

See also:

Residual-current device, Residual-current device - Operation, Residual-current device - Example, Residual-current device - Use, Residual-current device - Limitations, Residual-current device - Types

Read more here: » Residual-current device: Encyclopedia II - Residual-current device - Types

United Devices also operates a series of public projects on their grid.org website as part of a philanthropic effort to improve humanity. It also has the side-effect of acting as a marketing tool, helping to spread awareness of the Grid MP Global product, and proving the scalability of it. Some of the costs associated with operating the past projects on grid.org have been financially sponsored in ...

See also:

United Devices, United Devices - Commercial operations, United Devices - Public philanthropy, United Devices - Projects, United Devices - Announced Users

Read more here: » United Devices: Encyclopedia II - United Devices - Public philanthropy

A residual current circuit breaker can improve the safety of an electrical system but cannot remove all risk of electric shock or fire. In particular, an RCD will not detect overload conditions, phase to neutral short circuits or phase-phase short circuits. Some sort of over-current protection (fuse or circuit breaker must be employed to guard against these occurrences. Combined RCD/circuit breaker units are available, and these combine the functions of an RCD with those of a conventional circuit breaker, responding appropriately to fault cu ...

See also:

Residual-current device, Residual-current device - Operation, Residual-current device - Example, Residual-current device - Use, Residual-current device - Limitations, Residual-current device - Types

Read more here: » Residual-current device: Encyclopedia II - Residual-current device - Limitations

Signet rings, generally bearing a coat of arms, are made by intaglio engraving, either in metal or gems (generally semiprecious). Agate is a frequent material, especially carnelian or banded agate like sardonyx; the banding make the impression contrast with the ground. Metal signet rings can also be cast, which is cheaper but yields a weaker material. ...

See also:

Seal device, Seal device - Seal as impression, Seal device - Seal as device, Seal device - Seals in East Asia, Seal device - Signet rings, Seal device - Links

Read more here: » Seal device: Encyclopedia II - Seal device - Signet rings

An indicator, such as a sound or motion, you can use to cause you to do something. You might use it in shamanism to stop a difficult experience or redirect your thinking from negative to positive thoughts.

(See also: trigger or triggering device, Magic, Shamanism, Pagan Dictionary)

Each and every Stargate has its own unique "address", a combination of at least 7 of the symbols that appear on the dialing Stargate. Thus each Stargate operates as a kind of combination lock. By using a DHD or similar device, or in some cases manually, a Stargate can "dial" the "address" of another Stargate, thereby singling that one out as the destination for the wormhole. The operation of a Stargate requires great amounts of energy, which is usually supplied by the DHD. Because a wormhole can only be maintained for a short time, and becau ...

See also:

Stargate device, Stargate device - Operation of Stargates, Stargate device - Complexities of Stargate-function, Stargate device - Plot surrounding the Stargates, Stargate device - The Milky Way's Stargates, Stargate device - The Giza Stargate's symbols, Stargate device - Pegasus' Stargates, Stargate device - Origin Galaxy's Stargates, Stargate device - Durability of Stargates, Stargate device - Earlier uses of the Stargate concept, Stargate device - Other uses of the Stargate concept

Read more here: » Stargate device: Encyclopedia II - Stargate device - Operation of Stargates

The Stargates themselves are particularly resistant to damage or destruction: in Stargate SG-1 a Stargate survived a direct hit from a meteor, whilst another was still capable of creating a stable wormhole while on a planet proximate to a newly-formed black hole. A Stargate has also been seen to continue functioning whilst entering a sun. In the ninth season of Stargate SG-1 the United States is revealed to have developed a naqahdriah-enhanced "Gatebuster" nuclear bomb that was theoretically capable of destroying a Starg ...

See also:

Stargate device, Stargate device - Operation of Stargates, Stargate device - Complexities of Stargate-function, Stargate device - Plot surrounding the Stargates, Stargate device - The Milky Way's Stargates, Stargate device - The Giza Stargate's symbols, Stargate device - Pegasus' Stargates, Stargate device - Origin Galaxy's Stargates, Stargate device - Durability of Stargates, Stargate device - Earlier uses of the Stargate concept, Stargate device - Other uses of the Stargate concept

Read more here: » Stargate device: Encyclopedia II - Stargate device - Durability of Stargates

In the spinoff series Stargate Atlantis, an expedition dials the 8-symbol address from Stargate Command to travel to the Ancient's Lost City of Atlantis, located in the Pegasus Galaxy. They find that the Ancients seeded planets throughout the Pegasus galaxy with Stargates too, but used gates of a slightly different design. However, the differences are mostly cosmetic. Pegasus Stargates have teal chevron lights instead of red ones, and the address symbols are groups of small white lights instead of embossed figures. Unlike the ...

See also:

Stargate device, Stargate device - Operation of Stargates, Stargate device - Complexities of Stargate-function, Stargate device - Plot surrounding the Stargates, Stargate device - The Milky Way's Stargates, Stargate device - The Giza Stargate's symbols, Stargate device - Pegasus' Stargates, Stargate device - Origin Galaxy's Stargates, Stargate device - Durability of Stargates, Stargate device - Earlier uses of the Stargate concept, Stargate device - Other uses of the Stargate concept

Read more here: » Stargate device: Encyclopedia II - Stargate device - Pegasus' Stargates

Its primary commercial product is called Grid MP and is offered in various editions, depending on the scalability needs of the customer. From Grid MP Workstation, to Grid MP Cluster, to Grid MP Enterprise, to Grid MP Global it can handle a variety of different-sized requirements. It also has a secondary product called MP Insight that allows customers to perform data analysis to determine if their c ...

See also:

United Devices, United Devices - Commercial operations, United Devices - Public philanthropy, United Devices - Projects, United Devices - Announced Users

Read more here: » United Devices: Encyclopedia II - United Devices - Commercial operations

The use of seals, in wax (sealing wax), in lacker or embossed on paper, to authenticate writings, is a practice as old as writing itself. Seals of this nature were applied directly to the face of the document or attached to the document by cords in the owner's, or to a narrow strip of the document sliced and folded down as a tail but not detached from the document. This helped maintain authenticity by not allowing the reuse of the seal. If a forger tried to remove the seal in the first case, it would break. In the other cases, although the f ...

See also:

Seal device, Seal device - Seal as impression, Seal device - Seal as device, Seal device - Seals in East Asia, Seal device - Signet rings, Seal device - Links

Read more here: » Seal device: Encyclopedia II - Seal device - Seal as impression

Cloaking device - Philadelphia Experiment. The Philadelphia Experiment was a supposed secret experiment conducted by the U.S. Navy at the Philadelphia Naval Yards at Philadelphia, Pennsylvania, on or before October 28, 1943, which went horribly awry. The experiment was allegedly to cast a vale of radar and possibly optical invisibility or transparency around a ship. Though most mainstream experts argue the incident is an urban legend, a number of people argue that the Philadelphia Experiment could be genui ...

See also:

Cloaking device, Cloaking device - Star Trek cloaking device, Cloaking device - Star Wars cloaking device, Cloaking device - Other references, Cloaking device - Real World Experimentation, Cloaking device - Philadelphia Experiment, Cloaking device - Active Camouflage, Cloaking device - Optical camouflage, Cloaking device - Russian Inventor Patents Invisibility Cloak

Read more here: » Cloaking device: Encyclopedia II - Cloaking device - Real World Experimentation

CCDs containing grids of pixels are used in digital cameras, optical scanners and video cameras as light-sensing devices. They commonly respond to 70% of the incident light (meaning a quantum efficiency of about 70%,) making them more efficient than photographic film, which captures only about 2% of the incident light. As a result CCDs were rapidly adopted by astronomers. An image is projected by a lens on the capacitor array, causing each capacitor to accumulate an electric charge proportional to the light intensity at that location. ...

See also:

Charge-coupled device, Charge-coupled device - History, Charge-coupled device - Applications, Charge-coupled device - Color cameras, Charge-coupled device - Competing technologies

Read more here: » Charge-coupled device: Encyclopedia II - Charge-coupled device - Applications