Like a directional T interchange, a semi-directional T interchange uses flyover (overpass) or underpass ramps in all directions at a three-way interchange. However, in a semi-directional T some of the splits and merges are switched to avoid ramps to and from the passing lane, eliminating the major disadvantage of the directional T. Semi-directional T interchanges are generally safe and efficient, though being three-level interchanges they do require more land and are costlier than trumpet interchanges. Semi-directional T interchanges are built as two or three-level stacks. Three-level stacks may use an overpass and underpass at a single point. Two-level stacks have a longer bridge or two shorter bridges on the same roadway.

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A freeway junction or highway interchange (US) or motorway junction (UK) is a type of road junction linking one controlled-access highway (freeway or motorway) to another, to other roads, or to a rest area or motorway service area. In the UK, most (but not all) junctions are numbered sequentially. In the US, interchanges are either numbered by mileage (in most states) or by interchange number.

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A variation of the windmill, called the diverging windmill, increases capacity by altering the direction of traffic flow of the interchanging highways, making the connecting ramps much more direct. There also is a hybrid interchange somewhat like the diverging windmill in which left turn exits merge on the left, but it differs in that the left turn exits use left directional ramps.

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A full Y-interchange (also known as a directional T interchange) is typically used when a three-way interchange is required for two or three highways interchanging in semi-parallel/perpendicular directions, but it can also be used in right-angle case as well. Their connecting ramps can spur from either the right or left side of the highway, depending on the direction of travel and the angle.

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To keep the block generation time equal to ten minutes on average, both Bitcoin and Bitcoin Cash use an algorithm adjusting the mining difficulty parameter. This algorithm is called the difficulty adjustment algorithm (DAA). Originally, both Bitcoin and Bitcoin Cash used the same difficulty adjustment algorithm, adjusting the mining difficulty parameter every 2016 blocks. Since 1 August 2017, Bitcoin Cash also used an addition to the DAA, called an Emergency Difficulty Adjustment (EDA) algorithm. EDA was used alongside the original DAA and it was designed to decrease the mining difficulty of Bitcoin Cash by 20%, if the time difference between 6 successive blocks was greater than 12 hours.[36]

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All songs now for sale in the iTunes Store are iTunes Plus. If you previously bought music with DRM from the iTunes Store, you might be able to download DRM-free versions of your songs with an iTunes Match subscription. The tracks must show as Matched or Purchased in the iCloud Status column in your iTunes library. The same album or song must also still be available in the iTunes Store.

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Bitcoincash is a peer-to-peer cryptocurrency in many regards similar to Bitcoin. Coins are created and transfered using an open source cryptographic protocol and are not managed by any central authority. Thanks to the adoption of Segregated Witness, and the Lightning Network, bitcoincash has some technical advantages over Bitcoin and other major cryptocurrencies. It is capable of handling a greater number of transactions in a given time and thus reducing potential bottlenecks, as seen with Bitcoin. Also, payment cost of bitcoincash is nearly zero and it’s payment speed is approximately four times greater than that of Bitcoin.

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Rising fees on the Bitcoin network contributed to a push by some in the community to create a hard fork to increase the blocksize.[11] This push came to a head in July 2017 when some members of the bitcoin community including Roger Ver felt that adopting BIP 91 without increasing the block-size limit favored people who wanted to treat bitcoin as a digital investment rather than as a transactional currency.[12][13] This push by some to increase the block size met a resistance. Since its inception up to July 2017, Bitcoin users had maintained a common set of rules for the cryptocurrency.[12] Eventually, a group of bitcoin activists,[14] investors, entrepreneurs, developers[12] and largely China-based miners were unhappy with Bitcoin's proposed SegWit improvement plans meant to increase capacity and pushed forward alternative plans for a split which created Bitcoin Cash.[15] The proposed split included a plan to increase the number of transactions its ledger can process by increasing the block size limit to eight megabytes.[12][13]

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Rising fees on the Bitcoin network contributed to a push by some in the community to create a hard fork to increase the blocksize.[11] This push came to a head in July 2017 when some members of the bitcoin community including Roger Ver felt that adopting BIP 91 without increasing the block-size limit favored people who wanted to treat bitcoin as a digital investment rather than as a transactional currency.[12][13] This push by some to increase the block size met a resistance. Since its inception up to July 2017, Bitcoin users had maintained a common set of rules for the cryptocurrency.[12] Eventually, a group of bitcoin activists,[14] investors, entrepreneurs, developers[12] and largely China-based miners were unhappy with Bitcoin's proposed SegWit improvement plans meant to increase capacity and pushed forward alternative plans for a split which created Bitcoin Cash.[15] The proposed split included a plan to increase the number of transactions its ledger can process by increasing the block size limit to eight megabytes.[12][13]

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Cryptocurrencies' blockchains are secure, but other aspects of a cryptocurrency ecosystem are not immune to the threat of hacking. In Bitcoin's 10-year history, several online exchanges have been the subject of hacking and theft, sometimes with millions of dollars worth of 'coins' stolen. Still, many observers look at cryptocurrencies as hope that a currency can exist that preserves value, facilitates exchange, is more transportable than hard metals, and is outside the influence of central banks and governments.

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A partial-Y interchange is used where one highway terminates at another highway with the same general directional alignment (usually a maximum of sixty degrees). The trunk of the terminating highway merges with the trunk of the continuous highway; vehicles traveling into the interchange may only exit traveling in the same direction. This type of interchange is often used for bypass routes, and is named for the shape the two highways' confluence makes when drawn on a map, creating a lower-case "y". An example exists at the western terminus of M-14 in Michigan. Another example is the interchange between I-15 and I-84 in Ogden, Utah

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The parclo is a safer modification of the cloverleaf design. Depending on the number of ramps used, they take up a moderate to large amount of land and are typically inexpensive to build. Parclos with more ramps have a greater capacity and efficiency than parclos with fewer ramps. Parclos are sometimes called a folded diamonds when only four ramps, in two quadrants, are used. If the loop ramps are constructed opposite or mirrored along the highway, weaving is avoided. Cloverleaf interchanges that involve a non-highway can be changed to parclos without too much reconstruction. Although the interchange's capacity is reduced, weaving is eliminated, increasing the safety and efficiency of the interchange.
A basketweave interchange is commonly found on highways using a collector/express system or long collector/distributor lanes. In a basketweave one highway is able to interchange with itself, allowing traffic traveling in the same direction to switch between carriageways through the use of flyover/under ramps created between two carriageways without causing weaving. These interchanges usually involve left exits and entry for the outer carriageway (right in left-hand drive) but can be configured to meet on the right.
A cloverleaf interchange is typically a two-level, four-way interchange where all turns across opposing traffic are handled by non-directional loop ramps. Assuming right-handed traffic, to go left vehicles first cross over or under the target route, then bear right onto a sharply curved ramp that turns roughly 270 degrees, merging onto the target route from the right, and crossing the route just departed. These loop ramps produce the namesake cloverleaf shape.

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A diverging diamond interchange (DDI) or double crossover diamond interchange (DCD) is similar to a traditional diamond interchange, except the non-highway lanes cross each other twice, once on each side of the highway. This allows all highway entrances and exits to avoid crossing the opposite direction of travel and saves one signal phase of traffic lights each.

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The parclo is a safer modification of the cloverleaf design. Depending on the number of ramps used, they take up a moderate to large amount of land and are typically inexpensive to build. Parclos with more ramps have a greater capacity and efficiency than parclos with fewer ramps. Parclos are sometimes called a folded diamonds when only four ramps, in two quadrants, are used. If the loop ramps are constructed opposite or mirrored along the highway, weaving is avoided. Cloverleaf interchanges that involve a non-highway can be changed to parclos without too much reconstruction. Although the interchange's capacity is reduced, weaving is eliminated, increasing the safety and efficiency of the interchange.

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The High Five in Dallas, Texas, United States: an example of interchange design. This is a complicated five-level stack interchange due to the proximity of frontage roads and high-occupancy vehicle lanes. This hybrid design is based on parts of a four-level-stack for highways and a three-level-diamond interchange to handle the frontage roads. 32.9242°N 96.7636°W

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Like a directional T interchange, a semi-directional T interchange uses flyover (overpass) or underpass ramps in all directions at a three-way interchange. However, in a semi-directional T some of the splits and merges are switched to avoid ramps to and from the passing lane, eliminating the major disadvantage of the directional T. Semi-directional T interchanges are generally safe and efficient, though being three-level interchanges they do require more land and are costlier than trumpet interchanges. Semi-directional T interchanges are built as two or three-level stacks. Three-level stacks may use an overpass and underpass at a single point. Two-level stacks have a longer bridge or two shorter bridges on the same roadway.

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A cloverleaf interchange is typically a two-level, four-way interchange where all turns across opposing traffic are handled by non-directional loop ramps. Assuming right-handed traffic, to go left vehicles first cross over or under the target route, then bear right onto a sharply curved ramp that turns roughly 270 degrees, merging onto the target route from the right, and crossing the route just departed. These loop ramps produce the namesake cloverleaf shape.

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A half-trumpet interchange is essentially a trumpet interchange with either its loop ramp or the outer connecting ramp (but not both), and only one of its directional ramps, instead of two, designed to meet the continuous highway in one direction, usually on a 90-degree or semi-perpendicular angle. Should the need arise it can easily be upgraded into a full trumpet interchange, making it a three-way interchange. Two examples exist in Michigan: Between Main Street and M-14 in Ann Arbor, and between Edward N. Hines Drive and Ford Road (M-153).

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A freeway junction or highway interchange (US) or motorway junction (UK) is a type of road junction linking one controlled-access highway (freeway or motorway) to another, to other roads, or to a rest area or motorway service area. In the UK, most (but not all) junctions are numbered sequentially. In the US, interchanges are either numbered by mileage (in most states) or by interchange number.

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Both Bitcoin as well as Bitcoin Cash use a proof-of-work algorithm to timestamp every new block. The proof of work algorithm used is the same in both cases. It can be described as a partial inversion of a hash function. Additionally, both Bitcoin and Bitcoin Cash target a new block to be generated every ten minutes on average. The time needed to calculate a new block is influenced by a parameter called the mining difficulty. If the total amount of mining power increases, an increase of the mining difficulty can keep the block time roughly constant. Vice versa, if the mining power decreases, a decrease of the mining difficulty can keep the block time roughly constant.[36]

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Yes! In 2017, the Bitcoin project and its community split into two. Perhaps the least controversial way to refer to each side is simply by their respective ticker symbols, BTC and BCH. While exchanges commonly refer to BTC as simply “Bitcoin”, Bitcoin Cash, usually represented by the BCH ticker symbol, is considered by its supporters to be a legitimate continuation of the Bitcoin project, and the version with the best chance of creating a globally adopted peer-to-peer electronic cash system.

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