glossary:glossary_b
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glossary:glossary_b [2013/05/12 10:13] – [BloNg] JJ M976 | glossary:glossary_b [2021/08/08 04:01] – added a link to Wikipedia EMF Wayne | ||
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- | Back EMF generally refers to the voltage that will appear across an inductor if the current is stopped suddenly | + | Back Electromotive Force ([[wp> |
[[: | [[: | ||
- | |||
===== Baud ===== | ===== Baud ===== | ||
- | Most people use baud to describe modem speeds in bits per second–but they are wrong. They may say a 9,600-bps modem transmits at 9,600 baud, but really | + | Baud in communications refers |
- | [[http:// | + | [[wp>Baud|Baud]] |
===== BC3 ===== | ===== BC3 ===== | ||
- | The BC3 is an automatic block control system otherwise known as SuperBloc (QV). It controls the speed of a model train depending on the occupation of the block ahead. If the block ahead is occupied the train will slow to a creep speed and stop at a designated point. Otherwise the train will accelerate to a preset speed. Manual control is also allowed for. Kits for the BC3 and literature | + | The BC3 is an automatic block control system otherwise known as SuperBloc (QV). It is a development of and compatible with BloNg (Block oriented N gauge). It controls the speed of a model train depending on the occupation of the block ahead. If the block ahead is occupied the train will slow to a creep speed and stop at a designated point. Otherwise the train will accelerate to a preset speed. Manual control is also allowed for.\\ Literature |
- | The BC3 kit is No38 Nos 39 and 40 are a test jig and a setting up kit. Kit instructions for 38 and 39 are available from MERG.\\ | + | |
[[: | [[: | ||
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- | Bell Signals | + | Bell Signals |
- | [[http:// | + | |
+ | The cadence of the Bell Signals were used to convey information. An example would be two bell rings would mean a train is entering a section and two rings followed by one ring may mean the train is clearing a section. | ||
+ | Though there are some commonly used bell signals, different railways at different times have had their own signaling schemes. | ||
+ | \\ | ||
+ | [[https:// | ||
+ | |||
+ | ===== BGA ===== | ||
+ | Ball Grid Array; a method of permitting a large number of connections in a smaller footprint for large scale Integrated Circuits. | ||
+ | See https:// | ||
===== Bipolar ===== | ===== Bipolar ===== | ||
+ | Within the context of the MERG Glossary <color blue> | ||
+ | * [[wp> | ||
+ | * [[wp> | ||
+ | * [[glossary_t# | ||
+ | The term is most commonly used for [[wp> | ||
+ | ===== Bistable ===== | ||
- | Bipolar transistor - presumably not bipolar disorder or manic depression. | ||
- | http://en.wikipedia.org/ | + | A Bistable is a circuit with two stable conditions so that it can be switched between the one and the other and hold it indefinitely. |
- | ===== Bistable ===== | ||
+ | =====Bit===== | ||
+ | A single ' | ||
+ | The bit (a portmanteau of binary digit) is a basic unit of information used in computing and digital communications. A binary digit can have only one of two values, and may be physically represented with a two-state device. These state values are most commonly represented as either a 0 or 1. [[wp> | ||
- | A Bistable is a circuit with two stable conditions so that it can be switched between the one and the other and hold it indefinitely. | ||
===== Bite ===== | ===== Bite ===== | ||
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- | Block control is the philosophy that a railway should be divided into blocks and that no train should normally be allowed to enter a block which is already occupied. This means that each block has a stop signal at which a train is required to wait if the block ahead is occupied. This will be set back 0.25 mile from the start of the next block. Further back there will be a distant signal which informs the driver that he needs to slow because the signal ahead is at stop.\\ | + | Block control is the philosophy that a railway should be divided into blocks and that no train should normally be allowed to enter a block which is already occupied. This means that each block has a stop signal at which a train is required to wait if the block ahead is occupied. Further back there will be a distant signal which informs the driver that he needs to slow because the signal ahead is at stop.\\ |
Modern electric signalling systems allow for more variation in slow signals with the a double yellow as a preliminary caution as well as the yellow caution to give two stages of slowing.\\ | Modern electric signalling systems allow for more variation in slow signals with the a double yellow as a preliminary caution as well as the yellow caution to give two stages of slowing.\\ | ||
[[http:// | [[http:// | ||
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- | Block Occupancy | + | Block Occupancy |
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- | The Block Oriented | + | The Block oriented |
- | + | [[: | |
- | + | ||
- | [[http:// | + | |
- | [[http:// | + | |
- | [[: | + | |
===== Boolean ===== | ===== Boolean ===== | ||
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- | In telecommunications and computing, bit rate (sometimes written bitrate or Rbit) is the number of bits that are conveyed or processed per unit of time. In digital multimedia, bit rate is the number of bits used per unit of time to represent a continuous medium such as audio or video. It is quantified using the bit per second (bit/s) unit or some derivative such as Mbit/ | + | Bits per second. |
While often referred to as " | While often referred to as " | ||
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- | * Unordered List ItemBuffers | + | * Buffers |
- | * Unordered List ItemCache | + | * Cache is typically frequently requested disk I/O. If multiple processes are accessing the same files, much of those files will be cached to improve performance (RAM being so much faster than hard drives), it's disk cache. |
In Hardware a buffer is a digital or analog stage used to isolate a signal source from the following circuit' | In Hardware a buffer is a digital or analog stage used to isolate a signal source from the following circuit' | ||
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- | * Buses are used for connecting components of a computer: a common example is the PCI bus in PCs. See computer bus. | + | * Buses are used for connecting components of a computer: a common example is the PCI bus in PCs. See [[https:// |
- | * Buses are used for communicating between computers (often microprocessors). See computer bus. | + | * Buses are used for communicating between computers (often microprocessors). See [[https:// |
- | * Buses are used for distribution of electrical power to components of a system. The (usually) thick conductors used are called busbars. In an electrical laboratory, for example, a bare bus-bar will sometimes line the wall, to be used by the engineers and technicians for its high electrical current carrying capacity, which allows a convenient approximation to zero voltage, or ground in the US, and earth in the UK. | + | * Buses are used for distribution of electrical power to components of a system. The (usually) thick conductors used are called busbars. In an electrical laboratory, for example, a bare bus-bar will sometimes line the wall, to be used by the engineers and technicians for its high electrical current carrying capacity, which allows a convenient approximation to zero voltage, or ground in the US, and earth in the UK. See [[https:// |
- | In analysis of an electric power network a " | + | =====Byte===== |
+ | The byte is a unit of digital information that most commonly consists of eight bits, representing a binary number. Historically, the byte was the number of bits used to encode | ||
glossary/glossary_b.txt · Last modified: 2022/10/10 21:55 by Bob Vetterlein