|Глосссарий терминов и сокращений по оптическим линзам|
An orange colored tint formulated to block out ultraviolet radiation and reduce blue light which may be harmful to the eye.
- 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".
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 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.
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 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
Block coin, английский
Block copolymer, английский
- Electromagnetic radiation at wavelengths shorter than the violet end of visible light
- Ultraviolet. the electromagnetic radiation with wavelengths shorter than about 400 nm and not visible to the human eye.
- Invisible electromagnetic radiation defined between 100 and 380nm.
- The part of the electromagnetic spectrum that falls just below visible violet. ultraviolet (uv) coating – a coating that blocks out uv radiation up to 380+ nanometers.
|Blue blur, английский|
The condition of unclear vision due to the scattered blue light in the visible spectrum.
Blinding glare, английский
Reflected glare caused by light reflected off smooth, shiny surfaces blocking vision.