buffer


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Related to buffer: buffer solution

buffer,

solution that can keep its relative acidity or alkalinity constant, i.e., keep its pH constant, despite the addition of strong acids or strong bases. Buffer solutions are frequently solutions that contain either a weak acid and one of its salts or a weak base and one of its salts. Many acid-base reactions take place in living organisms. However, for organisms to perform certain vital functions, the body fluids associated with these functions must maintain a constant pH. For example, blood must maintain a pH of close to 7.4 in order to carry oxygen from the lungs to cells; blood is therefore a powerful buffer.

buffer

[′bəf·ər]
(chemistry)
A solution selected or prepared to minimize changes in hydrogen ion concentration which would otherwise occur as a result of a chemical reaction. Also known as buffer solution.
(computer science)
(ecology)
An animal that is introduced to serve as food for other animals to reduce the losses of more desirable animals.
(electricity)
An electric circuit or component that prevents undesirable electrical interaction between two circuits or components.
(electronics)
An isolating circuit in an electronic computer used to prevent the action of a driven circuit from affecting the corresponding driving circuit.
(engineering)
A device, apparatus, or piece of material designed to reduce mechanical shock due to impact.
(mining engineering)
Blasted material piled against or near a rock face to improve fragmentation and reduce scattering of rock from the next blast.
A movable metal plate set in place in a tunnel excavation to limit the amount of rock scattered during blasting.

buffer

1. A device, apparatus, or material which reduces mechanical shock due to impact.
2. A device located at the bottom of an elevator hoistway, designed to stop a car or counter-weight from descending beyond its normal limit of travel; motion beyond this limit is taken up by storing or by absorbing and dissipating the kinetic energy of the car or counterweight. Also see oil buffer, spring buffer.
3. Any type of barrier that limits the scattering of rock as a result

buffer

1
1. one of a pair of spring-loaded steel pads attached at both ends of railway vehicles and at the end of a railway track to reduce shock due to contact
2. Chem
a. an ionic compound, usually a salt of a weak acid or base, added to a solution to resist changes in its acidity or alkalinity and thus stabilize its pH
b. a solution containing such a compound
3. Computing a memory device for temporarily storing data
4. Electronics an isolating circuit used to minimize the reaction between a driving and a driven circuit

buffer

2
1. any device used to shine, polish, etc.; buff
2. a person who uses such a device

buffer

(1)
An area of memory used for storing messages. Typically, a buffer will have other attributes such as an input pointer (where new data will be written into the buffer), and output pointer (where the next item will be read from) and/or a count of the space used or free. Buffers are used to decouple processes so that the reader and writer may operate at different speeds or on different sized blocks of data.

There are many different algorithms for using buffers, e.g. first-in first-out (FIFO or shelf), last-in first-out (LIFO or stack), double buffering (allowing one buffer to be read while the other is being written), cyclic buffer (reading or writing past the end wraps around to the beginning).

buffer

(2)
An electronic device to provide compatibility between two signals, e.g. changing voltage levels or current capability.

buffer

A reserved segment of memory within a program that is used to hold the data being processed. Buffers are set up to hold data coming in from and going out to the network or a local file. In a streaming media application, the program uses buffers to store an advance supply of audio or video data to compensate for momentary delays.

With computers, each application can allocate and deallocate its buffers from the general memory pool. For printers and other peripherals, the buffers provide temporary storage for data in the memory of the device. See buffering, double buffering, buffer overflow, buffer flush and bucket.
References in periodicals archive ?
The 2-day Riparian Forest Buffer Summit, sponsored by DCNR and the Western Pennsylvania Conservancy, is intended to engage conservation professionals, officials and citizens and provide information and skills -- from creating planting plans to working with contractors.
While buffer annuities may initially seem like a glowing solution to the concerns of still-risk adverse clients, the complexity of the products makes it difficult for even the experts to understand--in some cases leading to unpleasant surprises for clients who have relied on the advice of these experts.
The recent study did not include consideration of these aspects, rather solely concerned itself with total in-house buffer prep costs.
Such differences mean that the effects of a buffer zone distance requirement are heterogeneous across fields.
The remaining part of the paper discusses on the following information: section 2 reports the literature work done relevant to buffer utilization on network on-chip, the simulation work of the proposed system is presented in section 3, section 4 is recorded with discussion on the results obtained and finally section 5 concludes the proposed work with the direction for future enhancement.
The LANmark-OF Tight Buffer Universal is most suitable for direct termination by either anaerobic or hot melt connectors as well as with splicing of pigtails, it added.
For buffers with a CAGE code other than 1HFX2, the PQDR must be submitted to TACOM.
The buffer occupancy B(t) of a receiver at time t can be computed by the following equation.
One way to measure line efficiency is to calculate the average buffer level (ABL) for the whole line; evidently, the ideal is as few work-in-process pieces in storage as possible, so ABL needs to be kept low.
Ecologist Richard Lowrance, of the ARS Southeast Watershed Research Unit, and engineer George Vellidis, of the University of Georgia, recently conducted a 9-year study to determine whether restored conservation buffer zones in wetlands next to agricultural fields can reduce the amounts of phosphorus and nitrogen that reach streams that eventually lead to larger surface waters like lakes and rivers.
A string of rooms faces the sun, with a toplit hail behind to the north, and an acoustic buffer of storage cupboards in between.