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52-485: [REDACTED] Look up synchronized in Wiktionary, the free dictionary. Synchronized may refer to: Synchronization (US) or synchronisation (UK), the coordination of events to operate a system in unison Synchronized (album) , a 2002 album by Sheavy Synchronised (horse) (2003–2012), a racehorse synchronized , a programming reserved word that subjects

104-407: A block of code to mutual exclusion , for thread safety Synchronized trampoline , an event in trampoline gymnastics See also [ edit ] Synchronic (disambiguation) Synchronizer (disambiguation) Synchronization (disambiguation) Synchrony (disambiguation) Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with

156-407: A consequence, two different times would be displayed in the town and in use, with the station clocks and the times published in train timetables differing by several minutes from that on other clocks. Despite this early reluctance, railway time rapidly became adopted as the default time across the whole of Great Britain, although it took until 1880 for the government to legislate on the establishment of

208-562: A short delay. Line dance and military step are examples. Muscular bonding is the idea that moving in time evokes particular emotions. This sparked some of the first research into movement synchronization and its effects on human emotion. In groups, synchronization of movement has been shown to increase conformity, cooperation and trust. In dyads , groups of two people, synchronization has been demonstrated to increase affiliation, self-esteem, compassion and altruistic behaviour and increase rapport. During arguments, synchrony between

260-400: A single standard time and a single time zone for the country. Some contemporary commentators referred to the influence of railway time on encouraging greater precision in daily tasks and the demand for punctuality. Until the latter part of the 18th century, time was normally determined in each town by a local sundial . Solar time is calculated with reference to the relative position of

312-438: A standard railway time . In some territories, companies shared a single railroad track and needed to avoid collisions. The need for strict timekeeping led the companies to settle on one standard, and civil authorities eventually abandoned local mean time in favor of railway time. In electrical engineering terms, for digital logic and data transfer, a synchronous circuit requires a clock signal . A clock signal simply signals

364-436: Is a concept that the synchronization of biochemical reactions determines biological homeostasis . According to this theory, all reactions occurring in a living cell are synchronized in terms of quantities and timescales to maintain biological network functional. Synchronization of movement is defined as similar movements between two or more people who are temporally aligned. This is different from mimicry, which occurs after

416-418: Is a critical problem in long-distance ocean navigation. Before radio navigation and satellite-based navigation , navigators required accurate time in conjunction with astronomical observations to determine how far east or west their vessel traveled. The invention of an accurate marine chronometer revolutionized marine navigation. By the end of the 19th century, important ports provided time signals in

468-439: Is also an important concept in the following fields: Synchronization of multiple interacting dynamical systems can occur when the systems are autonomous oscillators . Poincaré phase oscillators are model systems that can interact and partially synchronize within random or regular networks. In the case of global synchronization of phase oscillators, an abrupt transition from unsynchronized to full synchronization takes place when

520-710: Is necessary to synchronize video frames from multiple cameras. In addition to enabling basic editing, synchronization can also be used for 3D reconstruction In electric power systems, alternator synchronization is required when multiple generators are connected to an electrical grid. Arbiters are needed in digital electronic systems such as microprocessors to deal with asynchronous inputs. There are also electronic digital circuits called synchronizers that attempt to perform arbitration in one clock cycle. Synchronizers, unlike arbiters, are prone to failure. (See metastability in electronics ). Encryption systems usually require some synchronization mechanism to ensure that

572-453: Is required to separate the effect of intentionality from the beneficial effect of synchrony. Synchronization is important in digital telephony , video and digital audio where streams of sampled data are manipulated. Synchronization of image and sound was an important technical problem in sound film . More sophisticated film, video, and audio applications use time code to synchronize audio and video. In movie and television production it

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624-501: Is the coordination of events to operate a system in unison. For example, the conductor of an orchestra keeps the orchestra synchronized or in time . Systems that operate with all parts in synchrony are said to be synchronous or in sync —and those that are not are asynchronous . Today, time synchronization can occur between systems around the world through satellite navigation signals and other time and frequency transfer techniques. Time-keeping and synchronization of clocks

676-530: The Bristol and Exeter Railway was running to London Time, the public clocks at both Exeter and Bristol operated to local time but showed London Time by a second minute hand, 14 and 10 minutes ahead, respectively, of its companion. In Exeter this situation arose due to the reluctance of the Dean of Exeter Cathedral to concede to the demands of the railway company, the cathedral clock being the principal timekeeper for

728-591: The GPS satellites and Network Time Protocol (NTP) provide real-time access to a close approximation to the UTC timescale and are used for many terrestrial synchronization applications of this kind. In computer science (especially parallel computing ), synchronization is the coordination of simultaneous threads or processes to complete a task with correct runtime order and no unexpected race conditions ; see synchronization (computer science) for details. Synchronization

780-530: The order of the event is important. Railway time Railway time was progressively taken up by all railway companies in Great Britain over the following seven years. The schedules by which trains were organised and the time station clocks displayed were brought in line with the local mean time for London or "London Time", the time set at Greenwich by the Royal Observatory , which

832-633: The Electric Time Company in the City of London, which enabled the transmission of a time signal along the railway telegraphic network to other stations. By 1855 time signals from Greenwich could be sent through wires alongside the railway lines across the length and breadth of Britain. This technology was also used in India to synchronise railway time. Before the advent of the telegraph, stationmasters adjusted their clocks using tables supplied by

884-736: The additional one the railway and post-office London time. On 22 September 1847, the Railway Clearing House , set up five years earlier to coordinate the distribution of revenue between railway companies, decreed that "GMT be adopted at all stations as soon as the General Post Office permitted it". From 1 December 1847, the London and North Western and the Caledonian Railways switched over. By January 1848, according to Bradshaws Railway Guide ,

936-451: The arguing pair has been noted to decrease; however, it is not clear whether this is due to the change in emotion or other factors. There is evidence to show that movement synchronization requires other people to cause its beneficial effects, as the effect on affiliation does not occur when one of the dyad is synchronizing their movements to something outside the dyad. This is known as interpersonal synchrony. There has been dispute regarding

988-505: The city. Similarly, the clock at The Bristol Exchange installed in 1822 subsequently had a second minute hand added. Bristol did not solely recognise railway time until September 1852. It was not for a further eight years and the arrival of the electric telegraph that railway time was the sole time recognised in these towns and others in the West Country , including Bath , Devonport and Plymouth . Another town that stood its ground

1040-612: The coupling strength exceeds a critical threshold. This is known as the Kuramoto model phase transition . Synchronization is an emergent property that occurs in a broad range of dynamical systems, including neural signaling, the beating of the heart and the synchronization of fire-fly light waves. A unified approach that quantifies synchronization in chaotic systems can be derived from the statistical analysis of measured data. In cognitive neuroscience, (stimulus-dependent) (phase-)synchronous oscillations of neuron populations serve to solve

1092-702: The daily Sentinel for 17 November 1883 protested that people would have to "eat sleep work ... and marry by railroad time". However, with the support of nearly all railway companies, most cities and influential observatories such as Yale and Harvard , this collaborative approach led to standard railway time being introduced at noon on 18 November 1883. This consensus held and was incorporated into federal law only in 1918. France adopted Paris Mean Time as its standard national time in 1891. It also required clocks inside railway stations and train schedules to be set five minutes late to allow travelers to arrive late without missing their trains, even while clocks on

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1144-406: The differences between local times to be computed. Before the arrival of the railways, journeys between the larger cities and towns could take many hours or days, and these differences could be dealt with by adjusting the hands of a watch periodically en route. In Britain, the coaching companies published schedules providing details of the corrections required. However, this variation in local times

1196-469: The differences between the local times of neighbouring towns. In Britain, local time differed by up to 20 minutes from that of London. For example, Oxford Time was 5 minutes behind Greenwich Time, Leeds Time 6 minutes behind, Carnforth 11 minutes behind, and Barrow almost 13 minutes behind. In India and North America, these differences could be 60 minutes or more. Almanacs containing tables were published and instructions attached to sundials to enable

1248-555: The early part of the 19th century, was refined by William Fothergill Cooke and Charles Wheatstone and was installed on a short section of the Great Western Railway in 1839. By 1852 a telegraph link had been constructed between a new electro-magnetic clock at Greenwich and initially Lewisham , and shortly after this London Bridge stations. It also connected via the Central Telegraph Station of

1300-491: The external walls of railway stations displayed Paris Mean Time. In 1911, France adopted Paris Mean Time delayed 9 minutes 21 seconds, making it equivalent to Greenwich Mean Time without mentioning Greenwich. At the same time, slow railway station clocks were eliminated. In Germany the standardisation of time had started to be discussed in the 1870s. North German railways were already regulated to Berlin Time in 1874. However, it

1352-768: The first reported incidents which brought about a change in how time was organised on railways in the United States occurred in New England in August 1853, the Valley Falls train collision . Two trains heading towards each other on the same track collided as the conductors had different times set on their watches, resulting in the death of 14 passengers. Railway schedules were co-ordinated in New England shortly after this incident Numerous other collisions led to

1404-419: The form of a signal gun, flag, or dropping time ball so that mariners could check and correct their chronometers for error. Synchronization was important in the operation of 19th-century railways, these being the first major means of transport fast enough for differences in local mean time between nearby towns to be noticeable. Each line handled the problem by synchronizing all its stations to headquarters as

1456-429: The general binding problem . According to the so-called Binding-By-Synchrony (BBS) Hypothesis a precise temporal correlation between the impulses of neurons ("cross-correlation analysis" ) and thus a stimulus-dependent temporal synchronization of the coherent activity of subpopulations of neurons emerges. Moreover, this synchronization mechanism circumvents the superposition problem by more effectively identifying

1508-640: The idea to be investigated by William Frederick Allen , Secretary of the General Time Convention and Managing Editor of the Travellers' Official Guide to the Railways . He proposed replacing the 50 different railway times with five time zones. He eventually persuaded the railway managers and the politicians running the cities that had several railway stations that it was in their interests to speedily adopt his simpler proposals, which aligned

1560-407: The local timezone. The Indian railway companies had to contend with different local times as the rapidly expanding routes extended out from Mumbai (formerly Bombay), Kolkata (formerly Calcutta), Lahore and Chennai (formerly Madras). Towards the end of the 1860s the situation became even more confused as the networks linked up. In 1870, to overcome the problems occurring, Chennai (Madras) time

1612-572: The only countries that decided not to officially adopt Greenwich Time, reflecting the political sensitivities of the time. Dublin mean time was set 25 minutes behind London time, although it came into line with international standard time in October 1916 when summer time ended, and most railway clocks were adjusted by 35 minutes rather than one hour. A slight variation was in railway stations in Ulster such as Belfast and Bangor where clocks displayed on

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1664-459: The railway company to convert local time to London Time. In turn, train guards set their chronometers against those clocks. The introduction of railway time was in the end swift despite not being straightforward. The Great Western Railway was the first to standardise its timetable on Greenwich Mean Time, in November 1840. One of the most vociferous proponents of standardising time on the railways

1716-759: The railways that had adopted London Time included the London and South Western , the Midland , the Chester and Birkenhead , the Lancaster and Carlisle , the East Lancashire and the York and North Midland . It was reported that by 1855 that 98 percent of towns and cities had transferred to GMT. On the other hand, not all railway companies convinced the local dignitaries to bring their clocks on public buildings in line without stern resistance. Although by 1844

1768-484: The receiving cipher is decoding the right bits at the right time. Automotive transmissions contain synchronizers that bring the toothed rotating parts (gears and splined shaft) to the same rotational velocity before engaging the teeth. Flash synchronization synchronizes the flash with the shutter . Some systems may be only approximately synchronized, or plesiochronous . Some applications require that relative offsets between events be determined. For others, only

1820-541: The same dial both Dublin mean time (railway time for the island of Ireland) and Belfast Time (local time), 23 minutes and 39 seconds behind Greenwich. Netherlands Railway time was based on GMT until 1909 when the country adopted ' Amsterdam time ' as the standard time, 19 minutes ahead of GMT. This persisted until 1940, when the Nazi occupation of the Netherlands required a shift to German time, which has continued to be

1872-419: The setting up of the General Time Convention, a committee of railway companies to agree on scheduling. In 1870 Charles F. Dowd , who was unconnected with the railway movement or civil authorities, proposed A System of National Times for Railroads , which involved a single time for railways but the keeping of local times for towns. Although this did not find favour with railway managers, in 1881 they agreed for

1924-494: The signature of synchronous neuronal signals as belonging together for subsequent (sub-)cortical information processing areas. In cognitive science, integrative (phase) synchronization mechanisms in cognitive neuroarchitectures of modern connectionism that include coupled oscillators (e.g."Oscillatory Networks" ) are used to solve the binding problem of cognitive neuroscience in perceptual cognition ("feature binding") and in language cognition ("variable binding"). There

1976-454: The standard. Though several private railways had been built construction of public railways in Sweden came later than most other European countries, delayed by concerns over construction costs and resistance from powerful shipping owners. Railway time was introduced on the main railway line between Stockholm and Gothenburg which opened in 1862. Timetables were based on solar time at Gothenburg,

2028-406: The start or end of some time period, often measured in microseconds or nanoseconds, that has an arbitrary relationship to any other system of measurement of the passage of minutes, hours, and days. In a different sense, electronic systems are sometimes synchronized to make events at points far apart appear simultaneous or near-simultaneous from a certain perspective. Timekeeping technologies such as

2080-407: The sun. This provided only an approximation as to time due to variations in orbits and had become unsuitable for day-to-day purposes. It was replaced by local mean time, which eliminated the variation due to seasonal differences and anomalies . It also took account of the longitude of a location and enabled a precise time to be applied. Such new-found precision did not overcome a different problem:

2132-485: The time in Rome, which although it would remain notionally at least under French military control until 1870, was seen as the heart of the nation. In addition to the adoption of a single railway time there was a progressive standardisation of time for civil and commercial purposes. Milan came in line straight away, Turin and Bologna on 1 January 1867, Venice on 1 May 1880 and Cagliari in 1886. Ireland and France were

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2184-475: The title Synchronized . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Synchronized&oldid=1218044092 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Synchronization Synchronization

2236-509: The true effect of synchrony in these studies. Research in this area detailing the positive effects of synchrony, have attributed this to synchrony alone; however, many of the experiments incorporate a shared intention to achieve synchrony. Indeed, the Reinforcement of Cooperation Model suggests that perception of synchrony leads to reinforcement that cooperation is occurring, which leads to the pro-social effects of synchrony. More research

2288-573: The westernmost end of the line. As a consequence passengers and businesses following local time would arrive at the station ahead of the train. There were many private railways that followed local time or their own railway time. On 1 January 1879, a national standard time was introduced across the whole of Sweden, one hour advanced of Greenwich mean time. Until 1 August 2018, Russia had a separate railway time, meaning that timetables and tickets on Russian railways followed Moscow Time regardless of local time. Starting from 1 August 2018, each station uses

2340-461: The zones with cities' railroad stations. In doing so they would pre-empt the imposition of more costly and cumbersome arrangements by different state legislators and the naval authorities, both of whom favoured retention of local times. Right to the end there was opposition expressed by many smaller towns and cities to the imposition of railway time. For example, in Indianapolis the report in

2392-553: Was Henry Booth , Secretary of the Liverpool and Manchester Railway , who by January 1846 had ordered the adjustment of clocks to Greenwich Mean Time at both Liverpool and Manchester stations. The Midland Railway adopted London Time at all of its stations on 1 January 1846. As a consequence, in February 1846 the town council of Nottingham ordered that the town clocks be furnished with three hands, two indicating local time and

2444-673: Was Oxford where the great clock on Tom Tower at Christ Church, Oxford had two minute hands. It was not until 2 August 1880, when the Statutes (Definition of Time) Act received the Royal Assent, that a unified standard time for the whole of Great Britain achieved legal status. As late as the 1950s, the Western Region of British Railways had an elaborate telephone ritual at 11:00 am for all signal boxes to synchronise their clocks with that at Paddington Station. One of

2496-621: Was adopted for all railways, for two reasons: the longitude of Chennai is roughly midway between those of Kolkata and Mumbai, and the Observatory there ran the telegraphic service which could be utilised to synchronise station times via the same time-signal system first used in Britain in 1852 to regulate railway time. Madras Time was popularised by its use in Newman's Indian Bradshaw Timetables. However, unlike in Britain, where railway time

2548-564: Was already widely known as Greenwich Mean Time (GMT). The development of railway networks in North America in the 1850s, India in around 1860, and in Europe, prompted the introduction of standard time influenced by geography, industrial development, and political governance. The railway companies sometimes faced concerted resistance from local people who refused to adjust their public clocks to bring them into line with London Time. As

2600-426: Was large enough to present problems for the railway schedules. For instance, Leeds time was six minutes behind London, while Bristol was ten minutes behind; sunrise for towns to the east, such as Norwich , occurred several minutes ahead of London. It soon became apparent that even such small discrepancies in times caused confusion, disruption, or even accidents. The electric telegraph , which had been developed in

2652-550: Was not until 1 April 1893 that a law was established by the German Empire "concerning the introduction of uniform time reckoning" by which all railways would operate and also all aspects of social, industrial and civil activity would henceforth be strictly regulated. Italy was newly unified as a country when on 12 December 1866 at the start of the winter season the railway timetables centred on Turin , Verona , Florence , Rome , Naples and Palermo were synchronised on

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2704-506: Was rapidly adopted countrywide and evolved not long after into standard time, in India the much larger size of the country and the autonomy enjoyed by Mumbai and Kolkata resulted in both Presidencies' retaining local times well into the 20th century. For the remaining part of the 19th century Madras time continued to be used by all railways. Proposals had been put forward for at least one meridian–based time zone for India as early as 1884. However, no consensus could be reached until 1906, when

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