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Clock
An equation clock is a mechanical clock which includes a mechanism that simulates the equation of time, so that the user can read or calculate solar time
Equation_clock
Apparent solar time minus mean solar time
indicated by a steady clock set so that over the year its differences from apparent solar time would have a mean of zero. The equation of time is the east
Equation_of_time
Time-telling device
determined simultaneously, without requiring a clock.[citation needed] Butterfield dial Equation clock Foucault pendulum Francesco Bianchini Horology
Sundial
Instrument for measuring, keeping or indicating time
A clock or chronometer is a device that measures and displays time. The clock is one of the oldest human inventions, meeting the need to measure intervals
Clock
Topics referred to by the same term
shown by a clock that runs at constant speed Equation clock, a clock that contains a mechanism that embodies the equation of time, so the clock shows solar
Equation_(disambiguation)
Type of simple planetary gear train
in a clock made by Joseph Williamson in 1720. It employed a differential to add the equation of time to local mean time, as determined by the clock mechanism
Differential (mechanical device)
Differential_(mechanical_device)
Measured time difference as explained by relativity theory
ISBN 978-3-642-01962-3. Extract of page 87 See equations 3, 4, 6 and 9 of Iorio, Lorenzo (2005). "An analytical treatment of the Clock Paradox in the framework of the
Time_dilation
Huygens first used a clock to calculate the equation of time (the difference between the apparent solar time and the time given by a clock), publishing his
History of timekeeping devices
History_of_timekeeping_devices
Clock regulated by a pendulum
A pendulum clock is a clock that uses a swinging weight known as a pendulum as its timekeeping element. The pendulum is an approximate harmonic oscillator
Pendulum_clock
Mathematical equation describing the motion of a rocket
The classical rocket equation, Tsiolkovsky rocket equation, or ideal rocket equation is a mathematical equation that describes the motion of vehicles that
Tsiolkovsky_rocket_equation
Medieval astronomical clock in the Czech Republic
The Prague astronomical clock, or Prague Orloj (Czech: Pražský orloj [praʃskiː orloj]), is a medieval astronomical clock attached to the Old Town Hall
Prague_astronomical_clock
Advanced astronomical clock
are considered a single movement. All but the Equation Works movements have dials on the front of the clock, arranged in left, center, and right sections
Jens_Olsen's_World_Clock
Power management technique for synchronous digital circuits
Pdynamic, by lowering unnecessary switching activity in clock signals. The following equation can approximate the dynamic power: P dynamic = α ⋅ C L ⋅
Clock_gating
Clock type
Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. The crystal oscillator, controlled
Quartz_clock
Mathematical model combining space and time
of synchronized clocks (x′, y′, z′, t′). With inertial frames, neither observer is under acceleration, and a simple set of equations allows us to relate
Spacetime
Circuit in a computer that maintains accurate time
A real-time clock (RTC) is an electronic timekeeping device, most often in the form of an integrated circuit (IC). Although the term often refers to the
Real-time_clock
Clock that monitors the resonant frequency of atoms
An atomic clock is a clock that measures time by monitoring the resonant frequency of atoms. It is based on the fact that atoms have quantised energy levels
Atomic_clock
constructed some famous public clocks, including the 1780 equation clock on the Hôtel de Ville de Paris and the clock on the Hôtel des Invalides. A nephew
Jean-André_Lepaute
Field equation from quantum gravity
Wheeler–DeWitt equation for theoretical physics and applied mathematics, is a field equation attributed to John Archibald Wheeler and Bryce DeWitt. The equation attempts
Wheeler–DeWitt_equation
American inventor
with. In 1801, Terry was granted a patent on an equation clock. This was the first patent for a clock mechanism that was ever granted by the United States
Eli_Terry
18th and 19th-century French horologist, watchmaker and scientist
seven years after he arrived in Paris, Ferdinand Berthoud submitted an equation clock to the Royal Academy of Sciences, thus demonstrating his extraordinary
Ferdinand_Berthoud
General-relativistic effect
closer the clock is to the source of gravitation), the slower time passes, speeding up as the gravitational potential increases (the clock moving away
Gravitational_time_dilation
Timepiece in which time is measured by the flow of liquid into or out of a vessel
A water clock, or clepsydra (from Ancient Greek κλεψύδρα (klepsúdra) 'pipette, water clock'; from κλέπτω (kléptō) 'to steal' and ὕδωρ (hydor) 'water';
Water_clock
Calculating the Sun's location in the sky at a given time and place
ahead of the clock. Since the main effect of this oscillation concerns time, it is called the equation of time, using the word "equation" in a somewhat
Position_of_the_Sun
Clock displaying astronomical information
date, the moon phase, and the equation of time, and includes a tide clock. Senzeilles [fr]. The Senzeilles astronomical clock [fr] was constructed by self-taught
Astronomical_clock
Mathematical description of a body in free fall
measured elapsed time with a water clock, using an "extremely accurate balance" to measure the amount of water. The equations ignore air resistance, which has
Equations_for_a_falling_body
Time in astronomy
apparent time is the equation of time. Local solar time or sundial time was used until the early 19th century when accurate mechanical clocks became commonplace
Local_mean_time
Natural phenomenon when daylight lasts for a whole day
minutes earlier by clock time; but the local time, 2 hours ahead of GMT in the summer, makes it 120 minutes later by clock time. The equation of time at that
Midnight_sun
Elapsed time between two events as measured by a clock that passes through both events
time along a timelike world line is defined as the time as measured by a clock following that line. The proper time interval between two events on a world
Proper_time
Fundamental quantity in physics
'universal clock'. An act of synchronization must be performed between two systems, at the least. There is a time parameter in the equations of quantum
Time_in_physics
Seasonal change of clock settings
of advancing clocks to (in theory) make better use of the longer daylight available during summer by having darkness fall at a later clock time. The typical
Daylight_saving_time
A matter wave clock is a type of clock whose principle of operation makes use of the apparent wavelike properties of matter. Matter waves were first proposed
Matter_wave_clock
Curve for which the time to roll to the end is equal for all starting points
Clock. Ames, Iowa: Iowa State University Press. Part II, Proposition XXV, p. 69. ISBN 0-8138-0933-9. Simmons, George (1972). Differential Equations with
Tautochrone_curve
Thought experiment in special relativity
stationary and synchronous clocks that are placed at points A and B, if the clock at A is moved along the line AB and stops at B, the clock that moved from A would
Twin_paradox
Electronic circuit with two stable states
triggering clock edge. If the T input is low, the flip-flop holds the previous value. This behavior is described by the characteristic equation: Q next =
Flip-flop_(electronics)
Concept that simultaneity depends on choice of reference frame
{\displaystyle \tau _{1}} , clock 1 sends a signal to clock 2 which is immediately reflected back. Its arrival time back at clock 1 is τ 2 {\displaystyle
Relativity_of_simultaneity
Graph of space and time in special relativity
time dilation and length contraction without the need of mathematical equations. The history of an object's location through time traces out a line or
Spacetime_diagram
Time scale
coordinate time tc of the clock's position in the chosen reference frame. Equation (2) is a fundamental and much-quoted differential equation for the relation
Coordinate_time
French physicist
is a French physicist specializing in quantum optics, cold atoms, atomic clocks, and ultracold quantum gases. He is an emeritus research director at the
Christophe_Salomon
Device to measure the passage of time
An hourglass (or sandglass, sand timer, or sand clock) is a device used to measure the passage of time. It comprises two glass bulbs connected vertically
Hourglass
Historic clock in France
The 24-hour dial Side view 12-hour clock and cherub Computus work Equations Astronomical clock "The Astronomical Clock". Office de Tourisme De Strasbourg
Strasbourg_astronomical_clock
Mechanism for regulating the speed of clocks
from equation (1) Glasgow, David (1885). Watch and Clock Making. London: Cassel & Co. pp. 279–284. Matthys, Robert J. (2004). Accurate Pendulum Clocks. UK:
Pendulum
Season of television series
introduces the now-iconic floating door, smashed window, clock, eyeball, wooden doll, and the equation for Einstein's theory of relativity. Rod Serling's introduction
The_Twilight_Zone_season_4
Two interrelated physics theories by Albert Einstein
defining feature is its use of the Einstein field equations. The solutions of the field equations are metric tensors which define the topology of the
Theory_of_relativity
Theory of interwoven space and time by Albert Einstein
a clock. Moving clocks run slower. Two events measured at the same time on a stationary clock occur at different times if measured on moving clocks. At
Special_relativity
German Mennonite clockmaker
Franklin clocks. The quintessence of Kinzing's mechanical musical clocks was the series of so-called Apollo clocks. A superb example of an Apollo clock is to
Peter_Kinzing
Calculation of elapsed time by the apparent position of the sun
seconds less or 29 seconds more than 24 hours of clock time. This change is quantified by the equation of time, and is due to the eccentricity of Earth's
Solar_time
Electronic control system
input frequency. These properties are used for clock synchronization, demodulation, frequency synthesis, clock multipliers, and signal recovery from a noisy
Phase-locked_loop
Timing of Islamic prayers
of the Earth's orbit and the inclination of its axis, it is called the equation of time. The declination of the sun is the angle between sun's rays and
Salah_times
Compact astronomical body
black hole physics. Only a few months after Einstein published the field equations describing general relativity, astrophysicist Karl Schwarzschild set out
Black_hole
Clock to calculate the date of Easter
A computus clock is a clock equipped with a mechanism that automatically calculates and displays, or helps determine, the date of Easter (and other dependent
Computus_clock
Dutch singer (born 1983)
Irene Jansen is a Dutch singer. She sang on the Ayreon album The Human Equation, portraying the character Passion. She was also the live backing vocalist
Irene_Jansen
Poincaré) as one under which Maxwell's equations were invariant. Poincaré (1900) analyzed the coordination of moving clocks by exchanging light signals. He also
History of Maxwell's equations
History_of_Maxwell's_equations
American satellite-based radio navigation service
time difference between the receiver clock and the satellite time is defined as an unknown clock bias b. The equations are then solved simultaneously for
Global_Positioning_System
German-born theoretical physicist (1879–1955)
arises from special relativity, has been called "the world's most famous equation". He received the 1921 Nobel Prize in Physics for "his services to theoretical
Albert_Einstein
Force needed to pull a spring grows linearly with distance
mechanical clock. The equation holds in many situations where an elastic body is deformed. An elastic body or material for which this equation can be assumed
Hooke's_law
Conceptual conflict between general relativity and quantum mechanics
longer a unique background parameter, but a general coordinate. The field equations of general relativity are not parameterized by time but formulated in
Problem_of_time
Mathematical question
Clock angle problems are a type of mathematical problem which involve finding the angle between the hands of an analog clock. Clock angle problems relate
Clock_angle_problem
temperatures. The Arrhenius equation can then be applied to calculate the rate constant for a specific temperature at which the radical clock reactions are conducted
Radical_clock
Family of elliptic curves used in cryptography
Edwards form in comparison to the more well known Weierstrass form. The equation of an Edwards curve over a field K which does not have characteristic 2
Edwards_curve
German–American aging researcher, geneticist and biostatistician
of California, Los Angeles. He is known for developing the Horvath aging clock, which is a highly accurate molecular biomarker of aging, and for developing
Steve_Horvath
Metric based on the exact solution of Einstein's field equations of general relativity
Friedmann–Lemaître (FL). When combined with Einstein's field equations, the metric gives the Friedmann equations, which have been developed into the Standard Model
Friedmann–Lemaître–Robertson–Walker metric
Friedmann–Lemaître–Robertson–Walker_metric
Scientific phenomenon
relativistic aberration equation is: Substituting the relativistic aberration equation Equation 8 into Equation 6 yields Equation 7, demonstrating the consistency
Relativistic_Doppler_effect
Analog-to-digital converter that uses an op-amp integrator
The run-down time measurement is usually made in units of the converter's clock, so longer integration times allow for higher resolutions. Likewise, the
Integrating_ADC
When a radio signal reaches a remote receiver
{\displaystyle m} received signal time delays plus the user clock's bias ( T i {\displaystyle T_{i}} in equation 3). Angle of arrival GSM localization Ranging Triangulation
Time_of_arrival
Continuous progression from past to future
longest. Practical, human-scale measurements of time are performed using clocks and calendars, reflecting a 24-hour day collected into a 365-day year linked
Time
12 o'clock in the daytime
same reasons, solar noon and "clock noon" are usually not the same. The equation of time shows that the reading of a clock (which tracks mean solar time)
Noon
Published papers of Albert Einstein in 1905
developed the principle of mass–energy equivalence, expressed in the equation E = m c 2 {\displaystyle E=mc^{2}} and which led to the discovery and use
Annus_mirabilis_papers
Interpretation of quantum mechanics
particles is defined by a guiding equation. The evolution of the wave function over time is given by the Schrödinger equation. The interpretation is named
De_Broglie–Bohm_theory
Calculation of position based on satellite signal timing
non-closed-form equations t ~ i = t i + δ t clock , i ( t i ) {\displaystyle {\tilde {t}}_{i}=t_{i}+\delta t_{{\text{clock}},i}(t_{i})} and δ t clock , i ( t
Satellite_navigation_solution
many towns and cities set their clocks to noon when the sun passed their local meridian, pre-corrected for the equation of time on the date of observation
Time_in_the_United_States
Diagrammatic representation of Sun's position over a period of time
on Earth at the same clock time every day for an entire year, or by plotting a graph of the Sun's declination against the equation of time. The resulting
Analemma
Collapsed core of a massive star
the equation leads to observables such as the mass and radius. There are many codes that numerically solve the TOV equation for a given equation of state
Neutron_star
Astronomical Measurement Device
mechanical average of a clock by as much as +/-16 minutes throughout the year. These variations are codified in the equation of time. Henry Sully, however
Gnomon_of_Saint-Sulpice
Simple battery made with a lemon for educational purposes
(galvanized) nails and screws. Commercial "potato clock" science kits include electrodes and a low-voltage digital clock. After one cell is assembled, a multimeter
Lemon_battery
Quantum mechanical waves describing matter
Compton wavelength Faraday wave Kapitsa–Dirac effect Matter wave clock Schrödinger equation Thermal de Broglie wavelength De Broglie–Bohm theory Atom interferometer
Matter_wave
Family of linear transformations
equations (T1) and (T2) that immediately yield (T3). The primed and unprimed tensors refer to the same event in spacetime. Thus the complete equation
Lorentz_transformation
Pendulum mechanism that adjusts with temperature
temperature-compensated clock pendulum invented by British clockmaker John Harrison around 1726. It was used in precision clocks. In ordinary clock pendulums, the
Gridiron_pendulum
The Ploërmel Astronomical Clock is a 19th-century astronomical clock in Ploërmel in Brittany, in north-west France. The clock was built and operational
Ploërmel_astronomical_clock
Paths of particles in the Schwarzschild solution to Einstein's field equations
The same equation can also be derived using a Lagrangian approach or the Hamilton–Jacobi equation (see below). The solution of the orbit equation is φ =
Schwarzschild_geodesics
Memorial and clock in York Minster, England
The York Minster astronomical clock is a memorial to the airmen operating from bases in Yorkshire, Durham, and Northumberland who were killed in action
York Minster astronomical clock
York_Minster_astronomical_clock
Timekeeping system on Earth relative to the celestial sphere
ancient times it was toward the constellation Aries. Common time on a typical clock (using mean Solar time) measures a slightly longer cycle, affected not only
Sidereal_time
Theory of gravitation as curved spacetime
relation is specified by the Einstein field equations, a system of second-order partial differential equations. John Archibald Wheeler summarized it: "Space-time
General_relativity
Area that observes a uniform standard time
Great Britain's public clocks were using GMT, but it was not made the island's legal time until August 2, 1880. Some British clocks from this period have
Time_zone
Computation modulo a fixed integer
familiar setting exhibiting modular arithmetic is the hour hand on a 12-hour clock. If the hour hand points to 7 now, then 8 hours later it will point to 3
Modular_arithmetic
Navigation and surveillance technique
required to solve this set of equations. An algorithm either: (a) determines numerical values for the TOT (for the receiver(s) clock) and d vehicle coordinates;
Pseudo-range_multilateration
Type of inertial force
and in particular, frames that do not use centrifugal forces in their equations of motion in order to describe motions correctly. Around 1914, the analogy
Centrifugal_force
Analogies between Maxwell's and Einstein's field equations
between the equations for electromagnetism and relativistic gravitation. More specifically, it is an analogy between Maxwell's field equations and an approximation
Gravitoelectromagnetism
236 (uranium-235 plus the neutron that caused the split). The following equation shows one possible split, namely into strontium-95 (95Sr), xenon-139 (139Xe)
Nuclear_weapon_design
Speed of electromagnetic waves in vacuum
known as the electric constant ε0 and the magnetic constant μ0, by the equation c = 1 ε 0 μ 0 . {\displaystyle c={\frac {1}{\sqrt {\varepsilon _{0}\mu
Speed_of_light
Line dividing one calendar day from the next
convenience. People traveling westward around the world must set their clocks: Back by one hour for every 15° of longitude crossed, and Forward by 24
International_Date_Line
Limiting set in dynamical systems
generally described by one or more differential or difference equations. The equations of a given dynamical system specify its behavior over any given
Attractor
Austrian mathematician and theoretical physicist (1844–1906)
revenue official. His grandfather, who had moved to Vienna from Berlin, was a clock manufacturer, and Boltzmann's mother, Katharina Pauernfeind, was originally
Ludwig_Boltzmann
Theoretical model for a type of autocatalytic reaction
vast excess and can thus be modeled at constant concentration, the rate equations become d d t [ X ] = [ A ] + [ X ] 2 [ Y ] − [ B ] [ X ] − [ X ] {\displaystyle
Brusselator
Network time synchronization protocol
two equations, we find that o ~ = 1 2 ( T 1 ′ − T 1 − T 2 ′ + T 2 ) {\displaystyle {\tilde {o}}={\frac {1}{2}}(T_{1}'-T_{1}-T_{2}'+T_{2})} The clock now
Precision_Time_Protocol
Deviation from Kepler's third law
In physics, the gravitomagnetic clock effect is a deviation from Kepler's third law that, according to the weak-field and low-velocity approximation of
Gravitomagnetic_clock_effect
Solution to the Einstein field equations
the Schwarzschild solution) is an exact solution to the Einstein field equations that describes the gravitational field outside a spherical mass, on the
Schwarzschild_metric
Three-shaft planetary gearset
{\displaystyle N_{s}\omega _{s}+N_{r}\omega _{r}=(N_{s}+N_{r})\omega _{c}.} This equation describes how the angular velocities of two gear elements determine the
Epicyclic_gearing
Hypothetical travel into the past or future
system of field equations that determine the metric, or distance function, of spacetime. There exist exact solutions to these equations that include closed
Time_travel
Property of certain dynamical systems
Dym equation Garnier integrable system Kaup–Kupershmidt equation Krichever–Novikov equation Korteweg–de Vries equation Landau–Lifshitz equation (continuous
Integrable_system
EQUATION CLOCK
EQUATION CLOCK
Girl/Female
Arabic
Culture; Education
Girl/Female
Hindu
Education
Girl/Female
Tamil
Education
Girl/Female
Indian, Telugu
Good Education
Boy/Male
Arabic, Muslim
Education
Boy/Male
Tamil
Education
Boy/Male
Muslim
Sky, Education, Instruction
Girl/Female
Arabic
Culture; Education
Boy/Male
Hindu
Vidya--education esh-ishwar--god --god of education
Girl/Female
Tamil
Education
Girl/Female
Indian, Punjabi, Sikh
Natural; Education
Girl/Female
Hindu, Indian, Tamil
Education
Girl/Female
Indian
Education
Girl/Female
Hindu
Modesty, Education
Boy/Male
Indian
Education
Girl/Female
Tamil
Sarsvati | ஸரஸà¯à®µà®¤à¯€
Goddess of education
Sarsvati | ஸரஸà¯à®µà®¤à¯€
Boy/Male
Tamil
Vidyesh | விதà¯à®¯à¯‡à®·Â
Vidya--education esh-ishwar--god --god of education
Vidyesh | விதà¯à®¯à¯‡à®·Â
Girl/Female
Indian, Marathi
Education
Girl/Female
Tamil
Modesty, Education
Boy/Male
Arabic, Muslim
Education; Instruction
EQUATION CLOCK
EQUATION CLOCK
Boy/Male
Biblical, British, English, German
My Corn
Girl/Female
American, British, English, Latin
Winged; Noble; Small Winged One
Boy/Male
American, Australian, British, Christian, Danish, Dutch, English, French, German, Swedish, Teutonic
Wise Power; Shield Wolf
Male
English
Latin form of Greek Kleitos, CLETUS means famous, renowned."Â
Girl/Female
Indian
Goddess Lakshmi
Girl/Female
Tamil
Taniskha | தாநீஸà¯à®•à®¾
Goddess of gold
Boy/Male
Arabic, Muslim
Help; Support
Boy/Male
Hebrew American English Greek
May Jehovah exalt. Exalted of the Lord. Jeremiah was a 7th century prophet and the author of...
Boy/Male
American, British, Christian, English
Lives on the Noble's Island
Boy/Male
Hindu, Indian, Kannada, Tamil, Telugu
Ocean; Sea
EQUATION CLOCK
EQUATION CLOCK
EQUATION CLOCK
EQUATION CLOCK
EQUATION CLOCK
n.
The process of finding the roots of an equation.
n.
Emulation; rivalry; competition.
n.
A quantity to be applied in computing the mean place or other element of a celestial body; that is, any one of the several quantities to be added to, or taken from, its position as calculated on the hypothesis of a mean uniform motion, in order to find its true position as resulting from its actual and unequal motion.
n.
The act or process of educating; the result of educating, as determined by the knowledge skill, or discipline of character, acquired; also, the act or process of training by a prescribed or customary course of study or discipline; as, an education for the bar or the pulpit; he has finished his education.
n.
Act of causing a quantity to disappear from an equation; especially, in the operation of deducing from several equations containing several unknown quantities a less number of equations containing a less number of unknown quantities.
n.
An expression of the condition of equality between two algebraic quantities or sets of quantities, the sign = being placed between them; as, a binomial equation; a quadratic equation; an algebraic equation; a transcendental equation; an exponential equation; a logarithmic equation; a differential equation, etc.
n.
A making equal; equal division; equality; equilibrium.
n.
The great circle of the celestial sphere, coincident with the plane of the earth's equator; -- so called because when the sun is in it, the days and nights are of equal length; hence called also the equinoctial, and on maps, globes, etc., the equinoctial line.
n.
The process of separating, by heat, an easily fusible metal from one less fusible; eliquation.
n.
An identical equation.
n.
Exudation.
v. t.
To reduce (an equation) in a lower degree.
n.
Instruction; education.
n.
The bringing of any term of an equation from one side over to the other without destroying the equation.
n.
A biquadratic equation.
n.
Any itching eruption.
n.
Literary education.
n.
Emulation; rivalry.
n.
The process of separating a fusible substance from one less fusible, by means of a degree of heat sufficient to melt the one and not the other, as an alloy of copper and lead; liquation.
adv.
With elation.