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A cellular automaton (pl. cellular automata, abbrev. CA) is a discrete model of computation studied in automata theory. Cellular automata are also called cellular spaces, tessellation automata, homogeneous structures, cellular structures, tessellation structures, and iterative arrays. [2] Cellular automata have found application in various ...
Immunofluorescence of HeLa cells showing microtubules in green, mitochondria in yellow, nucleoli in red and nuclear DNA in purple. HeLa (/ ˈhiːlɑː /) is an immortalized cell line used in scientific research. It is the oldest human cell line and one of the most commonly used. [1][2] HeLa cells are durable and prolific, allowing for extensive ...
CodeSignal, initially called CodeFights, was founded in 2014 [1][2] by Tigran Sloyan, Aram Shatakhtsyan, and Felix Desroches. CodeFights provided a platform for developers to compete in head-to-head timed coding challenges. [3] In 2017, CodeFights began to offer an interview practice mode. [4]
Cell site. A cell site, cell phone tower, cell base tower, or cellular base station is a cellular -enabled mobile device site where antennas and electronic communications equipment are placed (typically on a radio mast, tower, or other raised structure) to create a cell, or adjacent cells, in a cellular network.
Multiplexing. Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel. This allows several users to share a band of frequencies (see bandwidth).
The boundaries of the cells can also overlap between adjacent cells and large cells can be divided into smaller cells. [19] The frequency reuse factor is the rate at which the same frequency can be used in the network. It is 1/K (or K according to some books) where K is the number of cells which cannot use the same frequencies for transmission ...
Spectrolab. Spectrolab is a manufacturer of space solar cells and panels headquartered in Sylmar, California. It is a subsidiary of The Boeing Company, and part of Boeing Defense, Space & Security. Spectrolab was founded in 1956 by Alfred E. Mann, a billionaire American entrepreneur and philanthropist. Spectrolab was originally a division of ...
FMA. 67423. Anatomical terminology. [ edit on Wikidata] Gap junctions are membrane channels between adjacent cells that allow the direct exchange of cytoplasmic substances. [ 1 ] Substances exchanged include small molecules, substrates, and metabolites. [ 1 ] Gap junctions were first described as close appositions as other tight junctions, but ...