|Глоссарий по криптовалютам и блокчейну|
- The very first block in a block chain.
- The very first block in the block chain
- Pulley used in wire rope logging to change direction or increase pulling power (24).
- Последовательность передаваемых данных, рассматриваемая как завершенная и отдельная сущность. обычно имеет адрес, управляющее поле и контрольную сумму, позволяющую обнаруживать ошибки
- A block is a piece of wood used as a matrix for a print. these blocks are mainly used for wood engravings or wood cuts.
- Блок; этап (маршрутного полета)
- (колесная) колодка
- Angular chunk of solid rock ejected during a volcanic eruption.
- A pulley or set of pulleys.
- A group of bits, or characters, transmitted as a unit. an encoding procedure is generally applied to the group of bits or characters for error control purposes.
- Тормозная колодка, блок, шкив
- A concrete masonry unit having solid rectangular end faces as well as solid rectangular side faces. double corner block 325 double corner block double-crib barn
- 1. the stopping of a function 2. something which obstructs 3. a large piece of something a block of wood fell on his foot. 4. a period of time the training is in two three-hour blocks. 5. one of the different buildings forming a section of a hospital the patient is in block 2, ward 7. she is having treatment in the physiotherapy block. verb to fill the space in something and stop other things passing through it the artery was blocked by a clot. he swallowed a piece of plastic which blocked his oesophagus.
- A block is a package of data that contains zero or more transactions, the hash of the previous block ("parent"), and optionally other data. because each block (except for the initial "genesis block") points to the previous block, the data structure that they form is called a "blockchain".
- Блок: в филейном вязании - заполненная кокетка
- A pulley on a boat.
- (in mechanics termed a pulley.) blocks are flattish oval pieces of wood, with sheaves in them, for all the running ropes to run in. they are used for various purposes in a ship, either to increase the mechanical power of the ropes, or to arrange the ends of them in certain places on the deck, that they may be readily found when wanted; they are consequently of various sizes and powers, and obtain various names, according to their form or situation, thus:—a single block contains only one sheave or wheel. a double block has two sheaves. a treble or threefold block, three, and so on. a long-tackle or fiddle-block has two sheaves—one below the other, like a fiddle. cistern or sister block for top-sail lifts and reef tackles. every block is composed of three, and generally four, parts:—(1.) the shell, or outside wooden part. (2.) the sheave, or wheel, on which the rope runs. (3.) the pin, or axle, on which the sheave turns. (4.) the strop, or part by which the block is made fast to any particular station, and is usually made either of rope or of iron. blocks are named and distinguished by the ropes which they carry, and the uses they serve for, as bowlines, braces, clue-lines, halliards, &c. &c. they are either made or morticed (which see).
- The large piece of elm out of which the figure is carved at the head of the ship.
- A pulley, or multiple pulleys, mounted in a case.
Block (data), английский
Block (on claim form), английский
Block (on the bitcoin blockchain), английский
Data is permanently recorded in the bitcoin network through files called blocks. a block is a record of some or all of the most recent bitcoin transactions that have not yet been recorded in any prior blocks. new blocks are added to the end of the record (known as the blockchain), and can never be changed or removed once written (although some software will remove them if they are orphaned). each block memorializes what took place in the minutes before it was created. each block contains a record of some or all recent transactions and a reference to the block that came immediately before it. it also contains an answer to a difficult-to-solve mathematical puzzle – the answer to which is unique to each block. new blocks cannot be submitted to the network without the correct answer – the process of “mining” is essentially the process of competing to be the next to find the answer that “solves” the current block. the mathematical problem in each block is extremely difficult to solve, but once a valid solution is found, it is very easy for the rest of the network to confirm that the solution is correct. there are multiple valid solutions for any given block – only one of the solutions needs to be found for the block to be solved. because there is a reward of brand new bitcoins for solving each block, every block also contains a record of which bitcoin addresses or scripts are entitled to receive the reward. this record is known as a generation transaction, or a coinbase transaction, and is always the first transaction appearing in every block. the number of bitcoins generated per block starts at 50 and is halved every 210,000 blocks (about four years). bitcoin transactions are broadcast to the network by the sender, and all peers trying to solve blocks collect the transaction records and add them to the block they are working to solve. miners get incentive to include transactions in their blocks because of attached transaction fees. the difficulty of the mathematical problem is automatically adjusted by the network, such that it targets a goal of solving an average of 6 blocks per hour. every 2016 blocks (solved in about two weeks), all bitcoin clients compare the actual number created with this goal and modify the target by the percentage that it varied. the network comes to a consensus and automatically increases (or decreases) the difficulty of generating blocks. because each block contains a reference to the prior block, the collection of all blocks in existence can be said to form a chain. however, it’s possible for the chain to have temporary splits – for example, if two miners arrive at two different valid solutions for the same block at the same time, unbeknownst to one another. the peer-to-peer network is designed to resolve these splits within a short period of time, so that only one branch of the chain survives. the client accepts the ‘longest’ chain of blocks as valid. the ‘length’ of the entire block chain refers to the chain with the most combined difficulty, not the one with the most blocks. this prevents someone from forking the chain and creating a large number of low-difficulty blocks, and having it accepted by the network as ‘longest’
Block alignment, английский
Block and block, английский
The situation of a tackle when the blocks are drawn close together, so that the mechanical power becomes arrested until the tackle is again overhauled by drawing the blocks asunder. synonymous with chock-a-block.
Block and hook retractor, английский
Устройство для отвода талевого блока и крюка а
Block and tackle, английский
- A pulley block, 6 together with rope or cable, used to raise or shift a load.
- A system of pulleys and ropes. see also sheave, and block and tackle individually.
Block and tackle , английский
Block area, английский
Block beam, английский
A flexural structural member, composed of individual concrete blocks which are joined together by prestressing.
Block bond, английский
Block bonding, английский
In joining one part of a brick wall to another, the use of several courses of brickwork. block bridging, solid bridging, solid strutting short members (boards) which are fixed vertically between floor joists to stiffen the joists.
Block bridging., английский
Block capital, английский
Block cheek (foot/lead), английский
Block cipher, английский
A block cipher a type of symmetric-key encryption algorithm that transforms a fixed-length block of plaintext (unencrypted text) data into a block of ciphertext (encrypted text) data of the same length.
Block ciphering system, английский
Block coding, английский
The number of hashes that can be performed by a bitcoin miner in a given period of time (usually a second).
Double spend, английский
- Double spend refers to a scenario, in the bitcoin network, where someone tries to send a bitcoin transaction to two different recipients at the same time. however, once a bitcoin transaction is confirmed, it makes it nearly impossible to double spend it. the more confirmations that a particular transaction has, the harder it becomes to double spend the bitcoins.
- A deliberate fork, where a user with a large amount of mining power sends a transaction to purchase some product, then after receiving the product creates another transaction sending the same coins to themselves. the attacker then creates a block, at the same level as the block containing the original transaction but containing the second transaction instead, and starts mining on the fork. if the attacker has more than 50% of all mining power, the double spend is guaranteed to succeed eventually at any block depth. below 50%, there is some probability of success, but it is usually only substantial at a depth up to about 2-5; for this reason, most cryptocurrency exchanges, gambling sites and financial services wait until six blocks have been produced ("six confirmations") before accepting a payment.