other uses Clock disambiguation PBB geneid 9575 Clock Circadian Locomotor Output Cycles Kaput is a gene encoding a basic helix loop helix PAS transcription factor CLOCK that affects both the persistence and Period physics period of circadian rhythms . CLOCK functions as an essential Activator genetics ... 80566 8 url issn ref Discovery and function The Clock gene was first identified in 1994 by Dr. Joseph ... Cloning of the Mouse Circadian Clock Gene journal Cell volume 89 issue 4 pages 641 653 year 1997 month April pmid 9160755 doi 10.1016 S0092 8674 00 80245 7 ref The Clock mutants discovered through ... Mutagenesis and mapping of a mouse gene, Clock, essential for circadian behavior journal Science volume ... that intact Clock genes are necessary for normal mammalian circadian function. CLOCK protein ... , newly synthesized CLOCK CLK is hypophosphorylated in the cytoplasm before entering the nucleus ... the life cycle of the circadian CLOCK protein. journal The Journal of biological chemistry date 2009 ... clock. ref name Hung 2009 A similar model is found in mice, in which BMAL1 dimerizes with CLOCK to activate ... on the CLOCK BMAL heterodimer to repress the transcription of per and cry . ref name pmid9616112 cite ... CJ title Role of the CLOCK protein in the mammalian circadian mechanism journal Science volume 280 issue 5369 pages 1564 9 year 1998 month June pmid 9616112 doi 10.1126 science.280.5369.1564 ref CLOCK ... CLOCK is a histone acetyltransferase journal Cell volume 125 issue 3 pages 497 508 year 2006 pmid ... that CLOCK mediated HAT activity is necessary to rescue circadian rhythms in Clock mutants. ref name pmid16678094 Mutants of ClockClock mutant organisms can either possess a null mutation or an Muller s morphs antimorphic allele at the Clock locus that codes for an antagonist to the wild type ... upregulated by Clock . ref name pmid12015981 cite journal author Panda S, Antoch MP, Miller BH, Su ... of key pathways in the mouse by the circadian clock journal Cell volume 109 issue 3 pages 307 ... more details
Unreferenced date December 2009 A logical clock is a mechanism for capturing chronological and causal relationships in a distributed system . Logical clock algorithms of note are Lamport timestamps , which are monotonically increasing software counters. Vector clocks , that allow for total ordering of events in a distributed system. Version vector s, order replicas, according to updates, in an optimistic replicated system. Matrix clocks , an extension of vector clocks that also contains information about other processes views of the system. DEFAULTSORT Logical Clock Category Distributed algorithms de Logische Uhr fr horloge logique pt Rel gios l gicos sr ru ... more details
confused Linnaeus flower clock Image FloralClock ChCh gobeirne.jpg right thumb 250px http www.christchurchartgallery.org.nz Publications 1997 PublicArtInChristchurch FloralClock Floral Clock , Christchurch , New Zealand . Image 97t.jpg right thumb 250px Tehran , Iran . A floral clock or flower clock is a large decorative clock set into a flower bed in a park or other public recreation area. The floral clock was a form of carpet bedding set onto an operational clock face, invented in 1903 by John ... across the United Kingdom. In Edinburgh the clock mechanism is set inside the plinth of the statue ... the clock does not survive. Most have the mechanism set in the ground under the flowerbed, which was then planted to visually appear as a clock face with moving arms also holding plants . the following ... from a publication of 1678 called The Skilful Gardener where the author describes such a clock at an exhibition in Paris. Image Reloj.jpg right thumb 250px Zacatl n Floral Clock The only flower clock with two faces moved by the same system is located in Zacatl n, Puebla , Mexico . It has two faces .... Michael Jackson had a floral clock at his Neverland Ranch . Another floral clock can be seen in the International ... Francaix ref He named each of the movements on various flowers, and their place on the clock in hours. See also Floral clock Frankfort, Kentucky References Reflist Brent Elliott, Floral Clock , Oxford ... External links http www.bbc.co.uk dna h2g2 A5170024 History of the Flower Clock http ces.iisc.ernet.in ... time The floral clock in West Hendon, London, UK is at coordinates coord 51 34 30.55 N 0 14 12.70 W type landmark name West Hendon floral clock http stamaria.marin.esc.edu.ar lalujanera ... 02 us 20090702 NEVERLAND 17.html Michael Jackson s Floral Clock http ua traveling.com en article flower clock World s Biggest Flower Clock http www.edinburghguide.com floralclock Edinburgh Floral Clock http www.yingguo123.com uk E8 8B 8F E6 A0 BC E5 85 B0 E8 8A B1 E9 92 9F Floral Clock chinese http ... more details
Image Master clock system.png thumb Diagram of electric time system used around 1910 to keep time in factories, schools, and other large institutions. The master clock , controlled by a temperature compensated mercury pendulum, is wired to slave clock s throughout the building. In addition to wall clocks, it also controls time stamps that are used to stamp documents with the time, and a turret clock used in a clock tower. The program clock is a timer that can be programmed with punched paper tape to ring bells or turn machines on and off at preprogrammed times. A clock network or clocksystem is a set of clocks designed to always show exactly the same time by communicating with each other. Clock networks usually include a central reference clock master clock kept in sync with an official time ... be executed precisely. A central clocksystem allows a television station s master control and Television producer production personnel to work within that schedule. A clock network synchronized to the standard ... sources The master clock in a clock network can receive accurate time in a number of ways through .... Clock networks in critical applications often include a backup source to receive the time, or provisions to allow the master clock to maintain the time even if it loses access to its primary time source ... connect to the master clock through either a cable or a short range wireless signal. Some slave ... to synchronize devices like computers to the master clock signal. Common features include ... factors in developing clock networks was the broadcast industry. Television , in particular ... increasingly automated. While television broadcasters were some of the first users of clock ... centers throughout the United States. Other common clock network users include airports and schools. History One of the first clock networks was installed by Charles Shepherd for the Great Exhibition ... , and his Shepherd gate clockclock outside the gate is still working. In the period before ... more details
Refimprove date December 2009 Clock gating is a Energy conservation power saving technique used in many synchronous circuit s Description Clock gating is a popular technique used in many synchronous circuits for reducing dynamic power dissipation . Clock gating saves power by adding more logic to a circuit to prune the clock tree . Pruning the clock disables portions of the circuitry so that the Flip ... leakage currents are incurred. ref Power efficient System Design, Preeti Ranjan Panda, Aviral Shrivastava ... 17, 2010 , Page 25,73, ISBN 978 1441963871 ref Clock gating works by taking the enable conditions ... must contain these enable conditions in order to use and benefit from clock gating. This clock gating ... mux es and replaces them with clock gating logic. This clock gating logic is generally in the form of Integrated clock gating ICG cells. However, note that the clock gating logic will change the clock tree structure, since the clock gating logic will sit in the clock tree. Clock gating logic ... conditions that can be automatically translated into clock gating logic by synthesis tools fine grain clock gating . Inserted into the design manually by the RTL designers typically as module level clock gating by instantiating library specific ICG Integrated Clock Gating cells to gate the clocks of specific modules or registers. Semi automatically inserted into the RTL by automated clock ... code. These typically also offer sequential clock gating optimisations. Note Any RTL modifications to improve clock gating will result in functional changes to the design since the registers will now hold different values which need to be verified. Sequential clock gating is the process of extracting ... registers can be clock gated. Although asynchronous circuit s by definition do not have a clock , the term perfect clock gating is used to illustrate how various clock gating techniques are simply ... on which you gate the clock of a synchronous circuit approaches zero, the power consumption of that circuit ... more details
, simplifying system design. 4 phase clock A 4 phase clock has clock signals distributed on 4 wires ...In electronics and especially Synchronous logic synchronous digital circuit s, a clock signal is a particular ... . A clock signal is produced by a clock generator . Although more complex arrangements are used, the most common clock signal is in the form of a square wave with a 50 duty cycle , usually with a fixed, constant frequency. Circuits using the clock signal for synchronization may become active ... and in the falling edges of the clock cycle. Digital circuits Most integrated circuit s ICs of sufficient complexity use a clock signal in order to synchronize different parts of the circuit, cycling at a rate less than the worst case internal propagation delay s. In some cases, more than one clock ..., which relies on a clock from a crystal oscillator . The only exceptions are asynchronous circuit s such as asynchronous circuit Asynchronous CPU asynchronous CPUs . A clock signal might also be gated, that is, combined with a controlling signal that enables or disables the clock signal for a certain ... analysis. Single phase clock Most modern synchronous circuit s use only a single phase clock in other words, they transmit all clock signals on effectively 1 wire. Two phase clock In synchronous circuit s, a two phase clock refers to clock signals distributed on 2 wires, each with non overlapping ... hamburg.de applets hades webdemos 12 gatedelay 40 tpcg two phase clock gen.html http micro.magnet.fsu.edu ... scmos scmos doc cells cgf104.html MOS ICs typically used dual clock signals a two phase clock in the 1970s .... Later Intel produced the 8224 clock generator and Motorola produced the MC6875. The Intel 8085 and the Motorola ... incorporated the clock generation on chip. The 8080 had a 2 MHz clock but the processing throughput was similar to the 1 MHz 6800. The 8080 require more clock cycles to execute a processor instruction. The 6800 had a minimum clock rate of 100 kHz while the 8080 could be halted ... more details
used the Electric clock Hipp Toggle impulse system these were Gent and Co., of Leicester, Magneta ...Image Master Clock driving slave clocks.JPG right thumb 220px Master Clock at left driving several slave clocks. Note third one along at the top from the right is a radio controlled quartz for reference A master clock is a precision clock that provides timing signals to synchronize Slave clock slave clocks as part of a clock network . The master clock in such installations is controlled by an accurate quartz crystal oscillator, usually referenced to an external frequency standard such as Time from NPL MSF , which is part of a world wide timekeeping system. In the days before the availability of such highly accurate reference time many master clocks were an accurate electrically maintained pendulum clock. Thousands of such clocks were installed, in schools, offices, railway networks, telephone exchanges and factories all over the world they resembled a longcase clock , but had a very robust mechanism and a less ornate case. The clock timing signals, generated by electrical contacts attached ... sirens, school bells and occasionally clock chiming mechanisms. Some types, such as the Synchronome had optional extra mechanisms to compare the time of the clock with a standard received from the GPO ... version of a Master Clock is the large clock ensemble found at the U.S. Naval Observatory ref http www.usno.navy.mil USNO time master clock ref align center valign top Image Master Clock 36A.JPG none thumb upright Master Clock 36A. These clocks were originally made with a synchronising mechanism ... station at Rugby such extras were removed by the manufacturers as per the above example if the clock went back to them for later repairs. Later versions did not have this mechanism fitted Image Clock 36 mark 6.jpg none thumb upright Closer view of a clock 36 mark 6 manufactured by Gent and Co. See Also Shortt Synchronome clock Pendulum clock Escapement References references br clear all External ... more details
by the Gastown steam clock in Vancouver A steam clock is a clock which is fully or partially powered ... phenomenon inspired by the Gastown steam clock built by Saunders in 1977. One exception is the steam clock built in the 19th century by Birmingham engineer John Inshaw to demonstrate the versatility of steam power. Steam Clock Tavern In 1859, the engineer and businessman John Inshaw took over the public ... models, Inshaw applied his interest in steam engine steam power to construct a steam powered clock ... at regular intervals, and the plate then drove the mechanism. The clock was installed above the door, and the pub became known as the Steam Clock Tavern. The establishment was sufficiently successful ... s Steam Clock url http www.search.digital ladywood.org.uk engine resource exhibition sequential ... 0&resource 7666 publisher Digital Ladywood accessdate 17 September 2010 ref Gastown steam clock Image Canada Vancouver Gastown Steam Clock.gif thumb right Showing the Gastown steam clock in operation Image Gastown Steam Clock Plaque1.jpg thumb 230px Front plaque on Vancouver Gastown steam clock Image SteamClockEngine.jpg thumb right 100px center Steam engine center Raymond Saunders first steam clock ... the clock is now owned by the City of Vancouver, funding for the project was provided by contributions ... motors, the clock displays the time on four faces and announces the quarter hours with a whistle ... abbr on &mdash from a Central Heat Distribution centralized steam heating system that serves a portion ... track from which they load onto a drive chain providing the driving force to the clock while the ball ... clock drive chain fork is properly positioned to receive it. Clock drive chain . A similar continuous ... a conventional pendulum clock mechanism through the upper sprocket. Ball return . At the bottom of the clock drive chain the balls come to rest upon an inclined blade leading to a chute where ... awaiting the passage of the lifting fingers. Clock movement . The Gastown clock keeps time by a small ... more details
Image ICS 952018AF.jpg thumb 200px A desktop PC clock generator, based on the chip ICS 952018AF and 14.3 MHz resonator on the left Image Silego clock generator.JPG thumb 200px A laptop PC clock generator, based on the Seligo chip A clock generator is a circuit that produces a timing signal known as a clock signal and behaves as such for use in synchronizing a circuit s operation. The signal can range from a simple symmetrical square wave to more complex arrangements. The basic parts that all clock ... clock, which required the clock generator to incorporate logic to convert the 50 50 duty cycle which is typical of raw oscillators. Other such optional sections include frequency divider or clock multiplier sections. Programmable clock generators allow the number used in the divider or multiplier to be changed .... The clock generator in a motherboard is often changed by computer enthusiasts to control the speed of their CPU , Front side bus FSB , GPU and RAM . Typically the programmable clock generator ... dynamic frequency scaling that frequently re program the clock generator. Timing Signal Generators TSGs TSGs are clock s that are used throughout service provider networks, frequently as the Building ... needs. A TSG is clock equipment that accepts input timing reference signals and generates output timing reference signals. The input reference signals can be either DS1 or Composite Clock CC signals ... CO alarm monitoring system An operations interface for local craftsperson use and communications with remote operations systems. See also Clock signal References http www.nuvoton.com hq enu ProductAndSales ProductLines ComputerIC Pages default.aspx Datasheets of clock generators from Nuvoton Winbond http www.idt.com ?catID 18691971 Datasheets of clock generators from IDT http www.realtek.com products productsView.aspx?Langid 1&PNid 8&PFid 16&Level 3&Conn 2 Datasheets of clock generators from Realtek DEFAULTSORT Clock Generator Category Clock signal ar ca Generador de rellotge de ... more details
is energized. Hourly Correction The correction impulse is issued by the system master clock at 57 ... at which time, all clocks in the system will display the same time as the master clock. The cycle causes ... by the system master clock at 5 57 54 AM and PM and is a longer version of the hourly correction impulse ...multiple issues refimprove June 2009 cleanup June 2009 In telecommunication , a slave clock is a clock that is coordinated with a master clock . Slave clock coordination is usually achieved by Phase waves phase locking the slave clock signal to a signal received from the master clock. To adjust for the transit time of the signal from the master clock to the slave clock, the phase of the slave clock may be adjusted with respect to the signal from the master clock so that both clocks are in phase. Thus ... ref In other areas, the term refers to satellite electrical clock s that operate remotely from an electrical pulse issued by a master clock . In the 19th and early 20th centuries, slave clocks were ... by electrical signals sent by a centralized master clock. These older styles of slave clocks either keep time by themselves, and are corrected by the master clock, or require impulses from the master clock to advance. Many slave clocks of these types remain in operation, most commonly in schools. IBM Simplex Synchronous Correction cycle Synchronous Systems This type system was developed by IBM ... & clock mechanisms have remained basically unchanged, other than appearance and style over the years ... of a master clock and a number of secondary clocks in remote locations. These secondary clocks appear to run like an ordinary plug in electric clock and run on their own synchronous electric motor ... clock only for the periodic synchronizing impulse. These clocks differ from the impulse type, which are electrically advanced each minute by the master clock. Impulse type clocks are usually called slave clocks since they cannot function at all without the master clock. There are two basic ... more details
the overall system time from being drastically skewed due to one erroneous clock. Network Time Protocol ...Clock synchronization is a problem from computer science and engineering which deals with the idea that internal clock s of several computers may differ. Even when initially set accurately, real clocks will differ after some amount of time due to clock drift , caused by clocks counting time at slightly ... on a Serial Line ref use the term clock synchronization merely to discuss getting one metronome like clock signal to pulse at the same frequency as another one ndash frequency synchronization and phase synchronization . Such clock synchronization is used in synchronization in telecommunications ... associated with clock skew that take on more complexity in a Distributed computing distributed system in which several computers will need to realize the same global time. For instance, in Unix ... to recompile unchanged code. The make command uses the clock of the machine it runs on to determine ... In a centralized system the solution is trivial the centralized server will dictate the system time. Cristian s algorithm and the Berkeley Algorithm are some solutions to the clock synchronization problem in a centralized server environment. In a Distributed computing distributed system the problem takes on more complexity because a global time is not easily known. The most used clock synchronization ... first F. title Probabilistic clock synchronization journal Distributed Computing volume 3 issue 3 ... 10.1007 BF01784024 ref The time server maintains its clock by using a radio clock or other accurate time source, then all other computers in the system stay synchronized with it. A time client will maintain its clock by making a procedure call to the time server. Variations of this algorithm make ... Berkeley Algorithm This algorithm is more suitable for systems where a radio clock is not present, this system has no way of making sure of the actual time other than by maintaining a global average ... more details
The clock rate typically refers to the frequency that a CPU is running at. It uses the International System of Units SI unit Hertz . More details The clock rate of a CPU is normally determined by the frequency ... , some fixed multiple of the crystal reference frequency . The clock distribution network inside the CPU carries that clock signal to all the parts that need it. An Analog to digital converter AD Converter has a clock pin driven by a similar system to set the sampling rate . In this context, the use of the word speed physical movement , should not be confused with frequency or its corresponding clock rate. Thus, the term clock speed or processor speed is a misnomer . CPU manufacturers typically charge premium prices for CPUs that operate at higher clock rates, a practice called Product binning binning . For a given CPU, the clock rates are determined at the end of the manufacturing process through ... be labeled with a higher clock rate, e.g., 1.50 GHz, while those that fail the standards of the higher clock rate yet pass the standards of a lesser clock rate may be labeled with the lesser clock ... publish a maximum clock rate specification, and they test chips before selling them to make sure they meet ... was as simple and as limited as changing the discrete clock crystal ... The advent of adjustable clock generators has allowed overclocking to be done without changing parts such as the clock crystal ... each clock pulse, the signal lines inside the CPU need time to settle to their new state. That is, every signal line must finish transitioning from 0 to 1, or from 1 to 0. If the next clock pulse ... many transitions, the higher the clock rate the more heat produced. Transistors may get destroyed ... 8080 CPU with a clock rate of 2 MHz 2 million cycles second . The original IBM Personal Computer IBM PC c. 1981 had a clock rate of 4.77 MHz 4,772,727 cycles second . In 1995, Intel ... cycles second , and in 2002, an Intel Pentium 4 model was introduced as the first CPU with a clock ... more details
Clock drift refers to several related phenomena where a clock does not run at the exact right speed compared to another clock. That is, after some time the clock drifts apart from the other clock. This phenomenon ... side, clock drift can be exploited by timing attack s. Clock drift in normal clocks Normal clocks ... variables. Thus the same clock can have different clock drift rates at different occasions. Mechanical ... have some kind of speed trimmer where one can adjust the speed of the clock and thus reduce the clock drift. For instance, in pendulum clock s the clock drift can be manipulated by slightly changing the length of the pendulum . The formula of Fast drift is dc dt 1. Atomic clocks Atomic clock s are very precise and have nearly no clock drift. The rotation of the Earth itself actually has much more clock drift less accuracy than modern atomic clocks. Thus to keep the Coordinated Universal Time ... Einstein predicted, relativistic effects can also cause clock drift due to time dilation Citation ... gives us gravitational time dilation . Briefly, a clock in a higher gravitational field e.g. ... clock appeared to be going faster. Note that it is time itself rather than the function of the clock .... For instance, the clocks in Global Positioning System GPS satellites experience this effect ... pogge Ast162 Unit5 gps.html Real World Relativity The GPS Navigation System Accessed 4 January 2010. ref Random number generators seealso Hardware random number generator Clock drift Unreferenced ... for cryptography . There are several similar ways clock drift can be used to build random number generator s RNGs . One way to build a hardware random number generator Clock drift hardware random number generator is to use two independent Crystal oscillator clock crystals , one that for instance ticks ... will then tick 10,000 times for each time the slower one ticks. But since clock crystals are not precise ... such a system is biased it might for instance produce more zeros than ones and so hundreds of somewhat ... more details
Unreferenced date October 2008 Image Sector clock.JPG thumb A Sector clock was a round clock mounted on mahogany used at military airfields and observation posts in the United Kingdom to track the movements of enemy aircraft and control friendly aircraft. History They were originally known as colour change clocks when introduced by the Royal Flying Corps in 1917 to monitor the movements of German aircraft. They played a significant role in the Battle of Britain and continued to be used by the Royal Air Force and Royal Observer Corps until the cold war period and are now sought after by collectors of aeronautica. Function The Sector Clock was a fundamental part of Ground controlled interception before modern computerized systems were put in place for airspace control. The clock face had a 12 hour dial and an inner ring for the 24 hour time widely used by the military and was marked with red, blue and yellow triangular segments. The position of the sighted aircraft was recorded, together with the colour of the triangle beneath the minute hand at the time of sighting. This data was then reported to sector headquarters such as RAF Bentley Priory , where counters representing each air raid were placed on a large table, which had a map of the UK overlaid and squared off with a British Modified Grid. The colour of counter to use for a new sighting was determined by the time of the sighting, the proper colour being indicated by the minute hand of the clock. As the plots of the raiding aircraft moved, the counters were pushed across the map by magnetic rakes . This system enabled Fighter Controllers to see very quickly where each formation was heading and allowing an estimate to be made .... Because of the simplicity of the system, decisions could be made quickly and easily. See also Battle of Britain Bunker External links http home.earthlink.net modguide opsroom.html The clock that saved Great Britain http www.ww2 pathfinders.co.uk Wyton 20sector 20clock.html RAF Wyton Sector Clock ... more details
2011 more footnotes November 2011 technical November 2011 File Cotehele Clock 01.jpg thumb 400px The Cotehele Clock The Cotehele clock is situated at Cotehele House, Saltash , Cornwall . History The first ... during the early years of their marriage from 1493 onward. The alcove that houses the clock was added ... the work carried out on the chapel. It is thus likely that the clock was installed at the chapel between 1493 and 1521, with more probability towards the earlier date. The clock is acknowledged to be the earliest turret clock in the United Kingdom still working in an unaltered state and in its original ..., the Cotehele clock was never converted to pendulum, which makes it the oldest original verge escapement and foliot clock in the world. Other clocks with this claim, such as the Salisbury cathedral clock , were converted and later retrofitted with a verge & foliot. As the construction dates ... clocks , the Cotehele Clock may well be the oldest working turret clock in the world. Even though large numbers of Turret clock turret clocks were installed in the 14th century, none of them survived. The unique circumstances at Cotehele house assured that the clock was not replaced and scrapped. File Cotehele House Chapel plan.png thumb 300px left Cotehele House Chapel floor plan the clock alcove ... for the clock as it has a chimney like chute that goes up to the bell and has just the right dimensions for the clock, the weights, and the double pulley system. It is unlikely that a second hand clock would have been procured for such a splendid new building. Also, the clock is in very similar style to those at Castle Combe Clock Castle Combe and Marston Magna Clock Marston Magna . 1962 Overhaul The clock was taken apart and transported to Thwaites & Reed for restoration in 1962. According to Cecil ... was carried out in steel, and the clock was taken back to Cotehele and re assembled. The strike .... Also, the wooden frame to which the clock is fixed seems to have been renewed. The verge suspension ... more details
In American football , clock management is an important aspect of game strategy. The team who holds the lead in the game will want to use as much time as possible, while the team that is trailing will want to conserve time so that there is enough to try to score. Upon kickoff the clock is started when ... out of bounds. The clock is then restarted when the offense snaps the ball for their first play ... clock. Either team calls for a Time Out see below or an official calls for a time out, perhaps because a player is injured or there is a penalty on the play. Officials will restart the clock after an official ... football , the clock is briefly stopped when a team earns a down football first down to allow the chain crew to reposition themselves. The NFL has no such stoppage. The clock runs out. If this happens ... time outs per half which they can use to stop the clock from running after a play. A Strategy For Managing .... There is a play clock which allows the offense 40 seconds from the time the ball is placed until they must snap their next play. A team wishing to use as much clock as possible would wait to snap the ball until the last possible second, assuming the game clock was still running, in order to use at least 40 seconds off the clock every play they run. Some teams employ a system to tell their players what pace to play at for example Slow, Normal, Fast. Slow Used when you want to use as much clock as possible this tells your players to play in a manner that will maximize your clock usage. That means ... the ball until as much of the play clock as possible has been used. This is commonly associated with the American ... this tells the offense to run and call plays as they normally would without concern for the clock .... John T. Reed is the writer of a clock management handbook. ref http www.johntreed.com FCM.html ref John Sterner also wrote a book entitled The Football Coaches Guide to Clock Management in 2003. Further ... Clock Management Category American football strategy pl Czas gry futbol ameryka ski ... more details
Image Horlo o 001.svg thumb The twelve clock positions Clock position is a way of communicating the relative direction of an object using the analogy of a 12 hour clock . One imagines a clock face lying either upright or flat in front of oneself, and identifies the twelve hour markings with the directions in which they point. Using this analogy, 12 o clock means ahead or above , 3 o clock means to the right , 6 o clock means behind or below , and 9 o clock means to the left . The other eight hours refer to directions that are not directly in line with the four major directions. In aviation , clock position refers to horizontal directions it may be supplemented with the words high and low to describe the vertical direction. 6 o clock high means behind and above the horizon , while 12 o clock low means ahead and below the horizon . ref Citation first Liz last Mariner date 2007 title Cleared for Takeoff English for Pilots, Book 1 publisher AE Link Publications isbn 978 0 9795068 0 2 pages 89 90 ref In media and culture The 1949 movie Twelve O Clock High takes its title from the system. In this case the position would be ahead and above the horizon . The phrase on your six refers to the system, six referring to the six o clock or following position. ref http www.urbandictionary.com define.php?term on 20your 20six Urban Dictionary on your six ref See also Clock angle problem Port and starboard References Reflist Category Clocks Category Orientation Category Units of angle Category Aviation terminology Aviation term stub ... more details
astronomical clock on the main town square. It is a rare example of a heliocentric system heliocentric ... in hour Italian hours also called Bohemian, or Old Czech, hours . In this system, 1 o clock ...Image Prague Astronomical Clock Detail 1.JPG thumb 300px right Astronomical clock face and animated figures Prague Astronomical Clock An astronomical clock is a clock with special mechanism technology ... to refer to any clock that shows, in addition to the time of day, astronomical information. This could ... with astronomical regulator , a high precision but otherwise ordinary pendulum clock used in observatories. Astronomical clocks usually represent the solar system using the geocentric model ... of the solar system. The sun is often represented by a golden sphere as it initially appeared ... with a pair of compasses in this 14th century miniature. Although not a clock in the traditional ... driven astronomical clock for his clock tower of Kaifeng City. Su Song is noted for having incorporated an escapement mechanism and earliest known endless power transmitting chain drive for his clock tower and armillary sphere to function for more info see water clock . Contemporary Islamic astronomy ... September 2010 such as the castle clock a water powered astronomical clock by Al Jazari in 1206 ... ref and the Astrolabe astrolabic clock by Ibn al Shatir in the early 14th century. ref David A. King ... of services and public events , and for modelling the solar system. The latter is an inevitable ... to apply a clockwork drive to the rotating plate to produce a working model of the solar system. Medieval ... of the mechanical clock lie in a complex realm of monumental planetaria, equatoria, and geared astrolabes ..., ref cite web last Whyte first Nicholas title The Astronomical Clock of Richard of Wallingford publisher ... been made. Wallingford s clock may have shown the sun, moon age, phase, and node , stars and planets .... De Dondi s clock was a seven faced construction with 107 moving parts, showing the positions ... more details
Image lanternclock.JPG thumb right 200px Lantern clock by Langley Bradley , London, c. 1700. Converted to clockwork mechanism, hence missing its weights. A lantern clock is a type of antique weight driven wall clock , shaped like a lantern . They were the first type of clock widely used in private homes ... lantern clock . One is that the name derived from the shape the clock resembles a rectangular ... of deceased clock makers, lantern clocks usually are simply referred to as house clocks , chamber clocks ... are bedpost , birdcage or Cromwellian clocks. Sheep s head clock was a fashionable term for a certain type of lantern clock that had an extremely large chapter ring covering almost the entire front. Origin of Lantern Clocks The English lantern clock is closely related to lantern clocks that can ... and France, of which some were clock makers, had established themselves in London at the end of the 16th ... and a need for a new phenomenon arose the domestic clock. Until that time clocks in English houses ... churches. Image Vallin.jpg thumb Clock that was signed N. Vallin 1598 Picture of a replica in the Dutch Museum Van Speelklok tot Pierement in Utrecht. The original clock is displayed in the British ... Lantern clock were made almost completely in brass , whereas most earlier clocks had been constructed ... are similar to its Continental relatives. In brief a wall clock with square bottom and top plates surmounted ... clock posts to several clock makers. In contrast to the Dutch variants, such as stool clocks, English ... driven type have been converted to spring or pendulum mechanisms. Guild system In only a few decades the lantern clock became very popular in London and from there its popularity spread to the entire ... productivity was the result of the high demand for this popular clock in combination with an effective guild system. In 1631 King Charles I granted a charter for a clockmaker guild in London the Worshipful Company of Clockmakers , which exists to this day. Many of the well known clock makers from ... more details
Image IBM time clock.jpg thumb right upright Early 20th century time clock made by IBM. The face shows ... of entry and exit was punched onto cards inside the box A time clock , sometimes known as a clock card machine or punch clock or time recorder , is a mechanical or electronic timepiece used to assist ... on the time clock. When the time card hit a contact at the rear of the slot, the machine would print ... an employee worked to calculate and pay an employee. History Image Time clock at wookey hole cave museum.JPG thumb right Time clock, made by National Time Recorder Co. Ltd. of Blackfriars, London at Wookey Hole Caves museum File Bundy Clock, Birmingham City Transport.jpg right thumb upright A Bundy Clock used by Birmingham City Transport to ensure that bus drivers did not depart from outlying ... .JPG right thumbnail 120px contactless magnetic time clock card Image clocking device.jpg right thumb 120px Electronic time clock The first time clock was invented on November 20, 1888, by Willard Bundy ... on the time card. Software applications offer such a system. The first punched card system to be linked ... time clock, clipper and punch hole cards. There are also variations based on manufacture and machine ... systems. A basic time clock will just stamp the date and time, on a time card. It may feature ... another, and buddy stamping, where a friend clocks in another member of staff. A basic clock can ... department and in some cases payroll software. These types of system are becoming more popular however ... to identify the employee to the system. These systems are much more advanced than the mechanical time clock, various reports can be generated, including European working time directive, and a Bradford .... The user will have their attribute scanned into the system. Biometric readers are often used in conjunction with an access control system, granting the user access to a building, and at the same ... such a buddy punching. When combined with an access control system they can help prevent other types ... more details
A game clock consists of two adjacent clock s and buttons to stop one clock while starting the other ... play is blitz chess , in which each player is given five minutes on the clock for the entire game ..., but the clock of the absent player continues to run if it is his turn, or starts to run if his ... clock. Analog clock s as pictured to the right are equipped with a flag a Dutch invention that falls ... the button on your side physically stops the movement of your clock and releases the hold on your ..., and a malfunctioning analog clock is a less serious event than a malfunctioning digital clock. ref ... See section What s the difference between a digital and analog clock and which should I use? ref Early development of digital game clocks Image Digitalna sahovska ura2.jpg thumb Digital chess clock ... Engineering student and chess player, created the first digital chess clock as a project for an undergraduate ..., and as a result, the clock had to be plugged in to a wall outlet. The high cost of LEDs at the time ... one advantage the timebase for the clock was driven off of a rectified version of 60 cycle AC ..., one player s counter was disabled while the other s was running. The clock only had one mode time ... of digital clocks and current usage Image Olimpiada Bled Slovenija deska.jpg thumb Digital chess clock ... 4,884,255 awarded in 1989 for a new type of digital chess clock. Fischer s digital clock gave each ... class tournaments use Fischer s system, though usually in combination with the more traditional clocks ... the need for them to keep looking at the clock, have not been adopted. Time controls main ... time controls implement some sort of delay clock, a small amount of time that is added for each move .... Fischer&mdash before a player has made his move, a specified time increment is added to his clock ... clock, as soon as his opponent moves, he receives the increment and has nine seconds to make a move ... increment is added to the player s clock. But if a player has moved faster than the time ... more details
. No matter what kind of musical clock it is a turret church clock, a bracket clock, a carriage clock, a longcase clock, an organ clock, or whatever else, the same basic system of how the clock plays ...Refimprove date November 2006 A Musical clock is a clock that marks the hours of the day with a musical tune played from a spiked cylinder either on bell instrument bells , organ pipes , bellows , combs and even hammered dulcimer dulcimer strings. The earliest ones began in mainly churches and would be used to mark times for the public and for farmers in fields to tell them when it was sunset dawn and lunchtime. Some musical clocks play a tune each hour where as others are known to play every 3 to 4 hours. This is seen by many to be an idea originated to do with Roman and Angelus times. The earliest known domestic one is by Nicholas Vallin , made in 1598 , and it currently resides in the British Museum in London . This clock plays a different piece of music on every 1 4 hour. However some purists argue this clock is still technically a quarter chiming clock due to the quarter past melody only being around 8 notes long. The hour melody is certainly a tune though. In terms of domestic clocks most particular early ones all the European clocks played tunes on carillon s of bells from a large spiked drum within the clock. Many of these were in bracket clock form and there are a majority of longcase ones too. Some played their tunes each hour while others played every 3 or 4 hours usually either preceded or followed by the hour strikes. The black forest later started to make trumpeteer musical clocks which played on horn bellows and have animated figures appear usually of some kind of trumpeter , and appear to be blowing out the tune. Some of the London clock makers also started using organ mechanisms and coned cylinder type music boxes some were even combined with a set of bells ... where the clock face opens up revealing crystals, flashing lights, or other eye catching details ... more details
Unreferenced stub auto yes date December 2009 Orphan date December 2009 A balloon clock is a bracket clock with a waisted or balloon shaped case. It was popular in England from the late 18th to the early 19th century. It is believed that balloon clock is derived from France French styles that are usually of satinwood or mahogany with a wiktionary Convex convex or flat dial. See also Banjo clock Carriage clock Lantern clock DEFAULTSORT Balloon Clock Category Clocks Category Antiques Furniture stub ... more details
journal last Marrison first Warren title The Evolution of the Quartz Crystal Clock journal Bell System ... journal last Marrison first Warren title The Evolution of the Quartz Crystal Clock journal Bell System ... clock Shortt Synchronome clock with an accuracy of one hundredth of a second per day. In this system ...multiple image image1 Galileo Pendulum Clock.jpg caption1 Pendulum clock conceived by Galileo Galilei around 1637. The earliest known pendulum clock design, it was never completed. width1 138 image2 GB 3 Gew Pendeluhr Luekk .jpg caption2 Vienna regulator style pendulum wall clock width2 110 A pendulum clock is a clock that uses a pendulum , a swinging weight, as its time keeping element. The advantage ... by Christiaan Huygens until the 1930s, the pendulum clock was the world s most precise timekeeper ... footer The first pendulum clock, invented by Christiaan Huygens in 1656 image1 Huygens first pendulum clock front view.png width1 120 image2 Huygens first pendulum clock.png width2 112 The pendulum clock was invented in 1656 by Dutch ethnic group and nation Dutch scientist Christiaan Huygens , and patented the following year. Huygens contracted the construction of his clock designs to clockmaker Salomon Coster , who actually built the clock. Huygens was inspired by investigations of pendulum ... clocks.aspx accessdate 2007 11 14 ref ref cite web title Pendulum Clock work The Galileo Project ... 03 ref Galileo had the idea for a pendulum clock in 1637, which was partly constructed by his son in 1649 ... clock designed by Galileo, Item 1883 29 work Time Measurement publisher Science Museum, London ... thumb left upright A lantern clock that has been converted to use a pendulum. To accommodate the wide ..., causing its Frequency period , and thus the rate of the clock, to vary with unavoidable variations ... first Michael year 2002 title Origin and Evolution of the Anchor Clock Escapement journal Control .... In addition to increased accuracy, the anchor s narrow pendulum swing allowed the clock s case to accommodate ... more details
of the day and nighttime hours. When the clock was wound, the indicator was moved back up the track to the appropriate marker. This setup had the advantage of being independent of the rate of the clock itself. The use of clock faces was part of the European technology received in Japan, and a number of arrangements were made to display Japanese hours on clock faces. Some had movable hours around the rim of a 24 hour clock dial. Others had multiple clock faces that could be changed with the seasons. To make a striking clock that told Japanese time, clockmakers used a system that ran two balances ... Japanese clock to run at two different speeds to indicate unequal hours. A nihongo Japanese clock wadokei is a mechanical clock that has been made to tell traditional Japanese time. Mechanical ... in the sixteenth century. These clocks were of the lantern clock design, typically made of brass or iron ... clock of European manufacture. Neither the pendulum nor the balance spring were in use among European ... clock technology to the needs of traditional Japanese timekeeping. Temporal hours File ClockMecanism.JPG thumb 250px Drawing of the mechanism of a Japanese clock. Early 19th century. Adapting the European clock designs to the needs of Japanese traditional timekeeping presented a challenge to Japanese ... watch es, and carried by their owners in inro pouches. The traditional Japanese time system The typical clock had six numbered hours from 9 to 4, which counted backwards from noon until midnight ... were therefore both marked as the sixth hour in the Japanese timekeeping system. File 1851Wadokei.JPG thumb Hisashige Tanaka s 1851 myriad year clock displays Japanese, equal hour, and calendar information ... clock, where the clock indicated time not on a clock face , but on an indicator attached ... day to night. The myriad year clock designed in 1850 by Hisashige Tanaka uses this mechanism. In 1873 ... Clock PDF http inet.museum.kyoto u.ac.jp conference02 YasuyukiSHIRAI.html The history of clocks technology ... more details
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