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- B (femtobarn): 10-15 barns. A unit used to measure cross-section. The inverse of this unit is used to measure integrated luminosity. >more
- B Physics: The study of particles containing the bottom (b) quark . The b quark is the second heaviest quark, and is found only at particle accelerators. B-Mesons are ideal objects to study the tiny...>more
- B-Meson: A meson containing a bottom (b) quark, and one lighter anti-quark. The b quark is the second heaviest quark, and is found only at particle accelerators. Only the top quark is heavier. >more
- B-Meson: A meson containing a bottom (b) quark , and one lighter anti-quark . The b quark is the second heaviest quark , and is found only at particle accelerators. Only the top quark is heavier.>more
- B0 :: A reference point on the Main Ring at which the Collider Detector at Fermilab is located (pronounced "B zero"). Other significant reference points include the D0 collision region, and C0, E0, and...>more
- B0 :: A reference point on the Main Ring at which the Collider Detector at Fermilab is located (pronounced "B zero"). Other significant reference points include the D0 collision region, and C0, E0, and...>more
- BaBar: This experiment, which focuses on B-mesons, uses the PEP II storage ring at the Stanford Linear Accelerator Center (SLAC). One of its primary goals is to investigate why the universe appears to be...>more
- Baby Boom: 'Baby Boom' is the term applied to the period of time from January 1, 1946 to December 31, 1964 when there was a boom in the birth rate. This period of time saw over 77 million births...>more
- Baby Bust: 'Baby Bust' is the term applied to the period of time from 1965 - 1976. Most births that occurred were to members of the baby boom generation. >more
- Baby-bot: In the laboratories of the Lira-lab of the University of Genoa it has been put to point Babybot, a small robot to the vanguard if compared to created concurrent its to the Medialab of the MIT of...>more
- Baby-bot update: Its name is BabyBot, is been born near the laboratories of robotics of the University of Genoa and is the tip of diamond of plan ADAPT financed from the European Commission in order to explore the...>more
- Bacillus thuringiensis (Bt): A species of soil bacterium that possess genes for a group of insecticides, the Bt toxins. Different strains of the bacterium produce different Bt toxins. Some organic farmers use this...>more
- back plane: A printed circuit board, located in the back of a chassis, that contains a data bus, power bus, and mating connectors for modules that will be inserted into the chassis. >more
- Back Porch:: This refers to the portion of Tevatron ramp after flattop where a bend field is held constant for a period of time.>more
- Back-End (BE): In the semiconductor industry, Back End corresponds to the second phase of manufacturing during which the silicon chip is mounted in a package designed (assembly) not only to protect it, but also...>more
- Backbone: A central high speed network that connects smaller, independent networks. the NSFnet is an example. The connections between the primary computers in a network. Stub networks branch off the backbone. >more
- Backcross: A cross between an animal that is heterozygous for alleles obtained from two parental strains and a second animal from one of those parental strains. Also used to describe the breeding protocol of...>more
- Background level(s): Levels of chemical or physical agents that are normally found in the environment. Two types of background levels may exist for chemical substances or physical agents: (a) Naturally occurring...>more
- Background noise: You'll most often see this term when reading about noise-canceling microphones that filter out background noise. It refers to the everyday sounds that are all around you...people...>more
- backup: A device or system that is kept on hand to replace a device or system that fails. >more
- Backup files: We recommend making copies of files that you've stored to a second medium (a CD or an e-mail server, for example) as a precaution, should the first medium fails. Anyone who has ever lost data...>more
- Bacteria: A large group of single-cell microorganisms. Some cause infections and disease in animals and humans. The singular of bacteria is bacterium. Another definition: A single-celled organism....>more
- Bactericides: Bactericides are used to kill bacteria. Such compounds only have protectant activity, thus, they must be applied before the bacterial infection occurs if they are to do any good. >more
- Bacteriology: Bacteriology is the study of bacteria (one-celled microorganisms), especially in relation to medicine and agriculture>more
- Bacteriophages: Viruses whose host is a bacterial cell. They consist of a protein coat or capsid enclosing the genetic material, DNA or RNA, that is injected into the bacterium upon infection. In genetic...>more
- Baka-Yoke: A Japanese term indicating the conception and use of devices or gadgets which, connected to an indicator (for example a warning light) signal the presence in a production line of an incorrect or...>more
- Ballast: Heavy substances which are loaded by a vessel to improve stability, trimming, sea-keeping, and to increase the immersion at the propeller. The term is frequently used in the context of marine...>more
- Ballast Movement: Heavy substances which are loaded by a vessel to improve stability, trimming, sea-keeping, and to increase the immersion at the propeller. The term is frequently used in the context of marine...>more
- Ballast Tank: Compartments at the bottom of a ship or on the sides which are filled with liquids to keep the ship stable and seaworthy. It also refers to any shipboard tank or compartment normally used for...>more
- Band: A specific range of frequencies in the radio frequency (RF) spectrum. In the United States , the FCC regulates bands to minimize interference. Each band is assigned a range of transmission...>more
- bandwidth: The range of frequencies expressed in Hertz over which a system is designed to operate. >more
- Bandwidth: 1) When used in reference to digital systems, bandwidth describes the amount of data that can be transmitted on a given path. The standard measurement in the digital transmission context is a...>more
- Bandwidth: Used to express the maximum possible throughput of a data link in bits per second . A T1 line has a bandwidth of 1.544 Mbps. A 28.8k baud modem has a nominal bandwidth of 0.0288 Mbps.>more
- Bar Coding: Graphical representation (generally narrow and wide bars) that represent one of a number of numeric or alphanumeric standards.>more
- Barbara L. Golden, Ph.D.: Associate Professor Dept. of Biochemistry Purdue University 175 South University Street West Lafayette, IN 47907-2063 Phone: (765) 496-6165 Fax: (765) 494-7897 E-Mail: barbgolden@purdue.edu...>more
- Barbed Wire: Barbed wire fencing was the answer to solve many Western farmers' problems. Many farmers had large amounts of land, but they could not keep the cowboys and cattle drives off their property....>more
- Barcoding: Machine/optical read capability labeling of packages for shipping and receiving transaction information such as part number, quantity, invoice number, etc.>more
- Barley: Barley is one of the most important cereal crops following wheat, maize and rice. Barley can grow in a wide range of areas even some that are unsuitable for most other crops. It is the most...>more
- Barn: A unit of cross-section, a barn is equal to 10-28 m2.>more
- barn: A unit of cross-section , a barn is equal to 10 -28 m 2 . >more
- Barrow: (animal science) A male pig castrated before reaching sexual maturity.>more
- Baryons: A hadron composed of three quarks. Examples include the protons and neutrons found in ordinary nuclei. >more
- baryons: A hadron composed of three quarks . Examples include the protons and neutrons found in ordinary nuclei. >more
- Basal cell carcinoma (BCC): A tumour that grows from skin cells and which can have different causes, including repeated severe sunburns or long-term exposure to the sun. There are three main types of cancers of the...>more
- Basalt: A dark brown or green igneous rock, formed by the cooling and solidification of molten lava on or near the Earth's surface. Details... Basalt ( IPA : /ˈbęsɒlt,...>more
- base: The maximum number of digits used to represent values in a number system. >more
- baseband coaxial cable: A communication medium that can send one transmission signal at a time at its original frequency. >more
- Baseline data: Fundamental units of basic inventory information that are crucial for biodiversity conservation planning and management. These are both biotic and abiotic and usually include: (1) the presence...>more
- BASIC module: An intelligent I/O interface capable of performing computational tasks without affecting the PLC processor's computing time. >more
- Basidiomycetes: Basidiomycetes are saprophytes in soil, leaf litter and wood. They produce sexual basiodiospores on basidium and produce asexual chlamydospores in hypae. >more
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