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Block chain (database)

A block chain or blockchain is a permissionless distributed database based on the bitcoin protocol that maintains a continuously growing list of data records hardened against tampering and revision, even by its operators. The initial and most widely known application of block chain technology is the public ledger of transactions for bitcoin, which has been the inspiration for similar implementations often known as altchains.


The block chain consists of blocks that hold timestamped batches of recent valid transactions. Each block includes the hash of the prior block, linking the blocks together. The linked blocks form a chain, with each additional block reinforcing those before it, thus giving the database type its name.


A block chain implementation consists of two kinds of records: transactions and blocks.


Transactions are the content to be stored in the block chain.Transactions are created by participants using the system. In the case of cryptocurrencies, a transaction is created anytime a bitcoin owner sends cryptocurrency to another.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Block_chain_(database) Pipeline (Unix)

In Unix-like computer operating systems (and, to some extent, Microsoft Windows), a pipeline is a set of processes chained by their standard streams, so that the output of each process (stdout) feeds directly as input (stdin) to the next one. Filter programs are often used in this configuration.

The concept of pipelines was invented by Douglas McIlroy at Unix's ancestral home of Bell Labs, prior to the actual invention of the operating system, and implemented in Unix at his insistence, shaping its toolbox philosophy. It is named by analogy to a physical pipeline. The standard shell syntax for pipelines is to list multiple programs to invoke in one command, separated by vertical bars:

Each program is assumed to take input and give output on its standard streams. Each "|" tells the shell to connect the standard output of the left program to the standard input of the right program by an inter-process communication mechanism called an (anonymous) pipe, implemented in the operating system. Since pipes are unidirectional, data flows through the pipeline from left to right.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Pipeline_(Unix)

Pipeline (instrumental)

"Pipeline" is a surf rock song by the Chantays, which was recorded in 1962.

The tune, originally called "Liberty's Whip", was renamed after the band members saw a surfing movie showing scenes of the Banzai Pipeline in Hawaii. The tune, fitting in with the popular surfing craze of the time, swiftly rose up the Billboard Pop charts, reaching #4, and becoming a classic hit of its time. The tune is notable for using Alberti bass arpeggios.

Although they had myriad surf tunes, "Pipeline" was the Chantays' only hit single, and is considered one of the landmarks of the surf genre. The track's distinctive sound was largely due to the mix being "upside down"; the bass guitar, electric piano and rhythm guitar were at the forefront, while the lead guitar and drums were buried. Although the 45-rpm was released only in monaural, the track was recorded in wide stereo, with the rhythm guitar hard left, the bass and drums hard right, and the electric piano and lead guitar centered. Modern reissues, beginning with the 1984 MCA Records 7" single, are stereophonic. Pipeline (video game)

Pipeline is a computer game for the BBC Micro and Acorn Electron, originally published by Superior Software in 1988. It is an overhead view action role-playing game set on a mining platform. The game was very well received by the gaming press. It was more recently remade for Microsoft Windows as Pipeline Plus.


The game is a fast four-way scrolling arcade adventure with a look similar to previous Superior hits Repton and Ravenskull, but with a higher frame rate. It is set on a mining platform above Io, the sulfur-rich moon of Jupiter.

Pipeline was bundled with graphics and level design programs, allowing players to design their own game scenarios incorporating keys and doors, patrolling guards, explosions, throwable objects, moving walls, transport puzzles in the style of Sokoban, pipes, teleports and other simple kinds of puzzle logic.


The game was written by Ian Holmes and William Reeve of Cambridge, England and published by the leading BBC Micro game company of the time, Superior Software of Leeds. Chain (Paul Haig album)

Chain (caste)
 Beta globin (also referred to as HBB, β-globin, haemoglobin beta, hemoglobin beta, or preferably haemoglobin subunit beta) is a globin protein, which along with alpha globin (HBA), makes up the most common form of haemoglobin in adult humans, the HbA. It is 146 amino acids long and has a molecular weight of 15,867 Da. Normal adult human HbA is a heterotetramer consisting of two alpha chains and two beta chains.

HBB is encoded by the HBB gene on human chromosome 11. Mutations in the gene produce several variants of the proteins which are implicated with genetic disorders such as sickle-cell disease and beta thalassemia, as well as beneficial traits such as genetic resistance to malaria.

Gene locus

HBB protein is produced by the gene HBB which is located in the multigene locus of β-globin locus on chromosome 11, specifically on the short arm position 15.5. Expression of beta globin and the neighbouring globins in the β-globin locus is controlled by single locus control region (LCR), the most important regulatory element in the locus located upstream of the globin genes. The normal allelic variant is 1600 base pairs (bp) long and contains three exons. The order of the genes in the beta-globin cluster is 5' - epsilon – gamma-G – gamma-A – delta – beta - 3'.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/HBB