glossary:glossary_b
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glossary:glossary_b [2019/09/05 17:32] – [Baud] clarify the word "them" tgerbic | glossary:glossary_b [2021/08/08 04:03] – Corrected the link to Wikipedia 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> |
[[: | [[: | ||
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===== Baud ===== | ===== Baud ===== | ||
- | Baud in communications refers to changes per second. In the very early days of MODEMs, for example, each bit sent equaled a single change, so baud equaled bits per second (BPS). The terms were initially interchangable. As newer modulation methods (the way the signal is sent or encoded) came along a baud represented more than one bit per second. For example a single baud may have represented two, three or four bits for each change. From that point forward, baud and BPS were no longer the same, though many people still use the terms interchangably. For the sake of clarity, use BPS to represent the number of bits sent per second. | + | Baud in communications refers to changes per second. In the very early days of MODEMs, for example, each bit sent equaled a single change, so baud equaled bits per second (BPS). The terms were initially interchangable. As newer modulation methods (the way the signal is sent or encoded) came along a baud represented more than one bit per second. For example a single baud may have represented two, three or four bits for each change. From that point forward, baud and BPS were no longer the same, though many people still use the terms interchangably. For the sake of clarity, use BPS to represent the number of bits sent per second.\\ |
+ | [[wp> | ||
===== 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 [[: | + | 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.\\ | + | |
- | [[https:// | + | |
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- | Bell Signals were used to convey information | + | Bell Signals are used as part of a block signalling protocol. |
- | [[http://www.signalbox.org/ | + | |
+ | The cadence of the Bell Signals were used to convey information. | ||
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+ | Though there are some commonly used bell signals, different railways at different times have had their own signaling schemes. | ||
+ | \\ | ||
+ | [[https:// | ||
===== BGA ===== | ===== BGA ===== | ||
Ball Grid Array; a method of permitting a large number of connections in a smaller footprint for large scale Integrated Circuits. | Ball Grid Array; a method of permitting a large number of connections in a smaller footprint for large scale Integrated Circuits. | ||
- | See https:// | + | See [[wp>Ball_grid_array|BGA]] |
===== Bipolar ===== | ===== Bipolar ===== | ||
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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 |
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- | [[https:// | + | |
- | [[http:// | + | |
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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 communicating between computers (often microprocessors). See [[https:// | * 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. 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. See [[https:// | ||
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- | In analysis of an electric power network a " | ||
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=====Byte===== | =====Byte===== | ||
The byte is a unit of digital information that most commonly consists of eight bits, representing a binary number. Historically, | The byte is a unit of digital information that most commonly consists of eight bits, representing a binary number. Historically, | ||
glossary/glossary_b.txt · Last modified: 2022/10/10 21:55 by Bob Vetterlein