When people think most of the digital age and its computers, satellites and mobile phones, the silicon chip is the mind of all the people. Yet despite its importance in shaping the world around us, many of the technologies we take for granted would not be possible without the atomic clock.
The first atomic clock was developed in 1955 by British born Dr Louis Essen who worked during the Second World War, the high-frequency radar, which led him to develop a resonance wavemeter, which was successfully used to measure the speed of light.
Using the same technology that has developed the first accurate atomic clock in 1955 at the National Physical Laboratory in the United Kingdom. It is based on the resonance of a cesium atom.
According to quantum theory, atoms can exist in certain quantized energy states depending on the orbits of the electrons from their nuclei. A clock operates by exposing cesium atoms to microwaves until they vibrate at one of their resonant frequencies. It was discovered that an atom of cesium that resonate 9192631770 Hertz (times per second).
Because of this precision in the resonance and the high number of oscillations atomic clocks (sometimes referred to as cesium oscillators) are extremely accurate. Essen first device was accurate to a second thousand years, but the next generation of atomic clocks are so accurate that does not lose a second to several hundred million years.
Because of this high level of accuracy problems in the way in which time the structure. traditionally GMT (Greenwich Meantime) was the basis of time. GMT is based on the principle that the sun is high in the sky at noon (or on the line of the meridian of Greenwich). Unfortunately, as the atomic clocks are so accurate it was discovered that the Earth itself is not as precise in its revolution and is often slowed by the gravitational effects of the Moon.
If nothing was done about it then perhaps the International Atomic Time (TAI - said the time of atomic clocks) through the synchronization with the UTC and, finally, the night would end with the day (though in different millennia).
Coordinated Universal Time (UTC), was developed to counter this phenomenon. It is based on the IAT, but represent the slower rotation of the Earth from time to time by adding "leap seconds", of which 33 have been added since 1970.
Atomic clocks are critical for telecommunications networks.Voice and transfers of data to travel around the world in packaging must be marked as the time is the only point of reference for a computer can be used to reassemble the packets.
The atomic clock also allows satellite communication possible, because the speed of light is so fast (900,000 km per second), a small variation over time could create huge differences. Global Navigation Satellite System (GNSS), such as GPS (Global Positioning System) are heavily dependent on the atomic clock synchronization signal is a GPS receiver uses to triangulate a position.
Thank you for atomic clocks and devices such as NTP (Network Time Protocol), which distributes an atomic clock timing reference received no radio or GPS receiver, a computer network, the synchronization of computers UTC. Thank you for this technology, electronic transactions can now be achieved within five nano-seconds. Without these technologies in online trading as the stock market, buying a plane ticket and even auction sites on the Internet would not be possible.
Saturday, January 23, 2010
Friday, January 22, 2010
Clocks - From the Sundial to the NTP server
Time is a concept that occupies the thoughts of humans since the earliest civilizations. One can only have been during the last century that we began to understand the time, thanks to the work of Albert Einstein, but the extent of his visit was an important element of society.
Historically, the time has been measured with the rotation of the Earth and other astronomical cycles such as the phases of the moon. The measurement of time and thus the identification of key events during the day, month or year has been crucial to the development of agriculture, religion, and complex societies.
While the calendars have been used for millennia, prehistoric monuments like Stonehenge, thought to indicate the winter solstice and summer and then locate the longest and shortest days of planting cultures, with small increments of time measurement is been a technological challenge.
The first watches were nothing but the timers, using water, burning candles and sand. They were able to measure a defined period, but less useful for identifying how much time left until expiration or other important events.
The sundial was the first real that you can watch (on a sunny day), to divide the day into equal portions, and thus provide a consistent measure of the day.
The mechanical clock appeared in the fourteenth century. While their technology is based on simple mechanics and were less accurate than sundials exist, they provide a solution to the obvious disadvantages of (day dial opaque).
Mechanical clocks really came into their own once the pendulum was developed in 1600 that provided the existing mechanical clocks can provide better accuracy. The development of mechanical clocks, pendulum engine went up over the centuries to come, and have become increasingly accurate.
However, once it was discovered that some crystals will oscillate at an exact price under the influence of an electric current, electronic watches resume as soon as he realized that the people provided much better precision.
However, during 1950, the atomic clock was developed, they used the oscillation of a single atom (usually cesium) which vibrates at a precise speed per second. Thank you to the atomic clocks that we have just discovered that the traditional way of using the rotation of the Earth and other celestial bodies as the basis of time-keeping would soon cause problems like Earth, was discovered, it would slow or speed up its rotation due to the effects of gravity on the moon.
If nothing is done, then the time told by atomic clocks (International Atomic Time, TAI) would be out of sync with the Earth and slowly becomes a date night.
A solution was found in UTC (Coordinated Universal Time), when leap seconds were added to compensate for the slowing of Earth's rotation.
UTC and atomic clocks have made it possible technologies such as satellites, global communication and the Internet. Most computer networks are governed by an atomic clock using NTP (Network Time Protocol). NTP servers receive the time signal from an atomic clock is a radio signal from the United States or GPS (Global Positioning System) network. This allows computers around the world to be synchronized at the same time scale (UTC), allowing time-sensitive operations, such as stock market and Internet commerce.
Historically, the time has been measured with the rotation of the Earth and other astronomical cycles such as the phases of the moon. The measurement of time and thus the identification of key events during the day, month or year has been crucial to the development of agriculture, religion, and complex societies.
While the calendars have been used for millennia, prehistoric monuments like Stonehenge, thought to indicate the winter solstice and summer and then locate the longest and shortest days of planting cultures, with small increments of time measurement is been a technological challenge.
The first watches were nothing but the timers, using water, burning candles and sand. They were able to measure a defined period, but less useful for identifying how much time left until expiration or other important events.
The sundial was the first real that you can watch (on a sunny day), to divide the day into equal portions, and thus provide a consistent measure of the day.
The mechanical clock appeared in the fourteenth century. While their technology is based on simple mechanics and were less accurate than sundials exist, they provide a solution to the obvious disadvantages of (day dial opaque).
Mechanical clocks really came into their own once the pendulum was developed in 1600 that provided the existing mechanical clocks can provide better accuracy. The development of mechanical clocks, pendulum engine went up over the centuries to come, and have become increasingly accurate.
However, once it was discovered that some crystals will oscillate at an exact price under the influence of an electric current, electronic watches resume as soon as he realized that the people provided much better precision.
However, during 1950, the atomic clock was developed, they used the oscillation of a single atom (usually cesium) which vibrates at a precise speed per second. Thank you to the atomic clocks that we have just discovered that the traditional way of using the rotation of the Earth and other celestial bodies as the basis of time-keeping would soon cause problems like Earth, was discovered, it would slow or speed up its rotation due to the effects of gravity on the moon.
If nothing is done, then the time told by atomic clocks (International Atomic Time, TAI) would be out of sync with the Earth and slowly becomes a date night.
A solution was found in UTC (Coordinated Universal Time), when leap seconds were added to compensate for the slowing of Earth's rotation.
UTC and atomic clocks have made it possible technologies such as satellites, global communication and the Internet. Most computer networks are governed by an atomic clock using NTP (Network Time Protocol). NTP servers receive the time signal from an atomic clock is a radio signal from the United States or GPS (Global Positioning System) network. This allows computers around the world to be synchronized at the same time scale (UTC), allowing time-sensitive operations, such as stock market and Internet commerce.
Thursday, January 21, 2010
Unlock the mystery behind the grandfather clocks
Have you ever wondered what mystery lies behind the grandfather clock? Why evoke emotions like that? Because they have their own brand of sentimentality?
A mystery behind the grandfather clocks
All this melodrama is really necessary. Because there really is a mystery behind the grandfather clock, a romance, if it is able to leave a mark over the years. And includes any person who stops to watch his swing in motion, or to listen to his strokes.
So what's the story? Have you ever wondered why it was called a grandfather clock in the first place? Yes, it is majestic, imposing but welcoming and comfortable as the previous chapter. But there's more to him than the common sense of all these responses.
Then, like the story?
It all started when Henry Clay Work set foot in a hotel called the George Hotel. It was 1875 when this happened. The work is on the border of County Durham and Yorkshire and stopped to listen to the stories of the people. "He was so impressed by the long history of this watch case has decided to write a song.
I can not wait to hear the story? Goes like this. Two brothers, who bore the name Jenkins owned and operated George Hotel. And in the middle of the room was proud to impose the clock. The watch is effective and has reminded the faithful of time, until one of the brothers died. After that, the clock simply stopped being effective. The hotel staff and local clockmakers, tried to repair as best they could. But their efforts were in vain. The clock simply not cooperate.
When the grandfather clock was given the name
And then the second brother died. After this unfortunate incident, the clock just stopped working completely. Has lost its raison d'etre.
Inspiration Henry Clay Work has continued to write a song about touching story heard. Gave the title of the song, "My Grandfather's Clock". And that's where the clocks got its present name. And that is how the grandfather clock became a legend.
The song became a hit
The song later became a hit in the '50s and '60s. The version presented by the Revelers made the airwaves in Europe. If you grew up in those decades, you are required to be familiar with the song. In 2002, Ken Hirai made a success of the song in Japan with its own version. The song won a high position in the ranking of popularity in Japan. E 'became a favorite among many generations of Japanese.
Now, popular singers such as Boyz II Men have their own interpretation of the song enough. Have you seen the episode of Twilight Zone called "Ninety Years without Slumbering? This episode gained inspiration for the song. You may have heard the same version of the song that is unacceptable. It's called" Cock my grandfather. "
And the legend lives (for the grandfather clock, that is). And you have this legend permanently in your reception area, with its unshakable pride and imposing facade.
A mystery behind the grandfather clocks
All this melodrama is really necessary. Because there really is a mystery behind the grandfather clock, a romance, if it is able to leave a mark over the years. And includes any person who stops to watch his swing in motion, or to listen to his strokes.
So what's the story? Have you ever wondered why it was called a grandfather clock in the first place? Yes, it is majestic, imposing but welcoming and comfortable as the previous chapter. But there's more to him than the common sense of all these responses.
Then, like the story?
It all started when Henry Clay Work set foot in a hotel called the George Hotel. It was 1875 when this happened. The work is on the border of County Durham and Yorkshire and stopped to listen to the stories of the people. "He was so impressed by the long history of this watch case has decided to write a song.
I can not wait to hear the story? Goes like this. Two brothers, who bore the name Jenkins owned and operated George Hotel. And in the middle of the room was proud to impose the clock. The watch is effective and has reminded the faithful of time, until one of the brothers died. After that, the clock simply stopped being effective. The hotel staff and local clockmakers, tried to repair as best they could. But their efforts were in vain. The clock simply not cooperate.
When the grandfather clock was given the name
And then the second brother died. After this unfortunate incident, the clock just stopped working completely. Has lost its raison d'etre.
Inspiration Henry Clay Work has continued to write a song about touching story heard. Gave the title of the song, "My Grandfather's Clock". And that's where the clocks got its present name. And that is how the grandfather clock became a legend.
The song became a hit
The song later became a hit in the '50s and '60s. The version presented by the Revelers made the airwaves in Europe. If you grew up in those decades, you are required to be familiar with the song. In 2002, Ken Hirai made a success of the song in Japan with its own version. The song won a high position in the ranking of popularity in Japan. E 'became a favorite among many generations of Japanese.
Now, popular singers such as Boyz II Men have their own interpretation of the song enough. Have you seen the episode of Twilight Zone called "Ninety Years without Slumbering? This episode gained inspiration for the song. You may have heard the same version of the song that is unacceptable. It's called" Cock my grandfather. "
And the legend lives (for the grandfather clock, that is). And you have this legend permanently in your reception area, with its unshakable pride and imposing facade.
Wednesday, January 20, 2010
The history of clocks, sundials of Atomic Clocks
Humanity has always been concerned about the measuring and recording the passage of time. Timing was essential for the development of civilization to know when to plant or harvest crops to identify the most important events of the year.
Time has always been measured against the movement of the Earth, one day is a revolution of the planet, while a year is a full orbit of the sun. Calendars were developed from the lines up to 20,000 years, when hunter-gatherers scratched and dug holes in sticks and bones may count the days between phases of the moon.
Civilization of the ancient Egyptians to the Roman Empire have used different methods to find out what day of the year. However, the measurement time when he went the whole day had always been difficult for mankind begins. Sundials are perhaps the first time, and the pieces can trace their origins to more than five thousand years, obelisks, when they were built, probably to allow the story of time through the distribution of their shadows.
However, time has told a sundial is based on the movement of the sun in the sky, which differs according to the seasons and of course, do not work during cloudy days or at night. Other methods, such as water clocks or simply act as an hourglass timer crude. Telling time of day, it would be difficult with people on the basis of comparison of time as references, such as: "As long it would take a man to walk a quarter of a mile.
People were dependent on these methods and others such as the bell rings to indicate the important moments until the 14th century, when mechanical clocks appeared to have been guided by the weight is regulated by a point-and exhaust Foliot (a system of gears that advance the gear train at regular intervals or 'ticks'). These clocks were much more reliable than solar clocks or other reliable methods to tell the precise time of day for the first time in human history.
The next step in the middle of the night came in the 17th century, when the pendulum was developed to help maintain the accuracy of the clock. Watches spread rapidly and it was not for another three hundred years that the next revolutionary step the clock will take place with the development of electronic watches. They were sitting on the motion of a vibrating crystal (usually quartz) to create an electrical signal with an exact frequency.
While electronic watches were much more accurate than mechanical watches, it has the development of atomic clocks and about fifty years ago that modern technologies such as satellite communications, GPS and computer networks around the world became possible.
Most atomic clocks use the resonance of cesium-133, which vibrates only at a frequency of 9,192,631,770 every second. Since 1967, the international system of Units (SI) has defined the oscillators as the number of cycles of this atom makes atomic clocks (sometimes called cesium seconds) standard for measuring time.
Atomic clocks are accurate to less than 2 nanoseconds per day, equivalent to about one second in 1.4 million years. Because of this precision, a universal time scale UTC (Coordinated Universal Time or Universal Time Coordinated) was developed, which maintains a continuous scale and stable over time and supports features such as leap seconds - added to compensate for the slow rotation of the Earth .
However, atomic clocks are extremely expensive and are usually found in the physics laboratory scale. However, the NTP (Network Time Protocol), the standard way to obtain time synchronization networks of computers, you can synchronize networks of an atomic clock, using the Global Positioning System (GPS) network or specialist radio transmissions.
The development of atomic clocks, GPS and NTP time servers was vital to the modern technology that allows networks of computers around the world to be synchronized with the UTC.
Time has always been measured against the movement of the Earth, one day is a revolution of the planet, while a year is a full orbit of the sun. Calendars were developed from the lines up to 20,000 years, when hunter-gatherers scratched and dug holes in sticks and bones may count the days between phases of the moon.
Civilization of the ancient Egyptians to the Roman Empire have used different methods to find out what day of the year. However, the measurement time when he went the whole day had always been difficult for mankind begins. Sundials are perhaps the first time, and the pieces can trace their origins to more than five thousand years, obelisks, when they were built, probably to allow the story of time through the distribution of their shadows.
However, time has told a sundial is based on the movement of the sun in the sky, which differs according to the seasons and of course, do not work during cloudy days or at night. Other methods, such as water clocks or simply act as an hourglass timer crude. Telling time of day, it would be difficult with people on the basis of comparison of time as references, such as: "As long it would take a man to walk a quarter of a mile.
People were dependent on these methods and others such as the bell rings to indicate the important moments until the 14th century, when mechanical clocks appeared to have been guided by the weight is regulated by a point-and exhaust Foliot (a system of gears that advance the gear train at regular intervals or 'ticks'). These clocks were much more reliable than solar clocks or other reliable methods to tell the precise time of day for the first time in human history.
The next step in the middle of the night came in the 17th century, when the pendulum was developed to help maintain the accuracy of the clock. Watches spread rapidly and it was not for another three hundred years that the next revolutionary step the clock will take place with the development of electronic watches. They were sitting on the motion of a vibrating crystal (usually quartz) to create an electrical signal with an exact frequency.
While electronic watches were much more accurate than mechanical watches, it has the development of atomic clocks and about fifty years ago that modern technologies such as satellite communications, GPS and computer networks around the world became possible.
Most atomic clocks use the resonance of cesium-133, which vibrates only at a frequency of 9,192,631,770 every second. Since 1967, the international system of Units (SI) has defined the oscillators as the number of cycles of this atom makes atomic clocks (sometimes called cesium seconds) standard for measuring time.
Atomic clocks are accurate to less than 2 nanoseconds per day, equivalent to about one second in 1.4 million years. Because of this precision, a universal time scale UTC (Coordinated Universal Time or Universal Time Coordinated) was developed, which maintains a continuous scale and stable over time and supports features such as leap seconds - added to compensate for the slow rotation of the Earth .
However, atomic clocks are extremely expensive and are usually found in the physics laboratory scale. However, the NTP (Network Time Protocol), the standard way to obtain time synchronization networks of computers, you can synchronize networks of an atomic clock, using the Global Positioning System (GPS) network or specialist radio transmissions.
The development of atomic clocks, GPS and NTP time servers was vital to the modern technology that allows networks of computers around the world to be synchronized with the UTC.
Tuesday, January 19, 2010
Precision timing, clocks and Development
The weather has always been important to civilizations throughout history, despite the fact that only now, in modern times, we arrived at some understanding of what the weather.
Narrative time has always been important, particularly for our agricultural past, when identifying the events on that date on the calendar to plant crops or how much time left until the night was crucial.
Our systems tell the time were always based around the movement of the Earth. A year is defined as one full orbit of the sun during the day is a revolution of our planet.
This method of solar time and lunar say is fundamental to the way we live our lives, it is not necessary to have a system that would allow weather days adrift in the evening and vice versa.
Time to say it was very basic to the Middle Ages, when the first mechanical clocks appeared in Europe. Before the water clock this time, basic, sundials and other crude timer was the only way to keep track of all the hours passed.
The first mechanical clocks were not very accurate and has called for a point-and-unloading Foliot (a system of gears that advance the gear train at regular intervals or 'ticks'), but soon the new technologies means that the clocks has become more precise.
The next big step forward in the waiting time has arrived with the development of quartz in the first half of the twentieth century. These new electronic watches were much more accurate than their mechanical parts-cons because it was based on a vibrating crystal (usually quartz) that oscillates when an electric current passes through.
Even if the clock has become smaller and more sophisticated, real accuracy is not achieved until the development of atomic clocks in 1950. The atomic clock uses the resonance of individual atoms (in most cases, cesium) which was so exactly 9,192,631,770 oscillations per second that the international system of Units (SI) defined a second that the number of oscillations' s cesium atom.
Indeed, while the electronic clock may lose one second every week, the atomic clock will not lose a second in several million years.
This increased accuracy, however, has been shown to cause some problems. Because of this precision, it was quickly discovered that the Earth's rotation, what we have based our system of time over the millennia, was not as accurate as our watches.
Given the gravity of the Moon from Earth, the Earth slows down gradually each year. Although this slow rotation of the Earth is less than one second of one year if it was not represented last days slipped into the night and vice versa (although in many millennia), making a forecast useless.
The only solution was to seconds more each year or so on to the international time scale (known as UTC or Universal Time Coordinated). This second jump, as they are called are considered by some as a loophole to keep the correct time and want to abolish, while others (including astronomers from around the world), argue that it is essential to monitor the 'track of night and day .
There are many ways to keep the correct time and the best solution is to use a dedicated NTP server to receive time signals from atomic clock time transmission via a radio signal or GPS. Watches dedicated Ethernet are also available that can receive one hour of an atomic clock.
Narrative time has always been important, particularly for our agricultural past, when identifying the events on that date on the calendar to plant crops or how much time left until the night was crucial.
Our systems tell the time were always based around the movement of the Earth. A year is defined as one full orbit of the sun during the day is a revolution of our planet.
This method of solar time and lunar say is fundamental to the way we live our lives, it is not necessary to have a system that would allow weather days adrift in the evening and vice versa.
Time to say it was very basic to the Middle Ages, when the first mechanical clocks appeared in Europe. Before the water clock this time, basic, sundials and other crude timer was the only way to keep track of all the hours passed.
The first mechanical clocks were not very accurate and has called for a point-and-unloading Foliot (a system of gears that advance the gear train at regular intervals or 'ticks'), but soon the new technologies means that the clocks has become more precise.
The next big step forward in the waiting time has arrived with the development of quartz in the first half of the twentieth century. These new electronic watches were much more accurate than their mechanical parts-cons because it was based on a vibrating crystal (usually quartz) that oscillates when an electric current passes through.
Even if the clock has become smaller and more sophisticated, real accuracy is not achieved until the development of atomic clocks in 1950. The atomic clock uses the resonance of individual atoms (in most cases, cesium) which was so exactly 9,192,631,770 oscillations per second that the international system of Units (SI) defined a second that the number of oscillations' s cesium atom.
Indeed, while the electronic clock may lose one second every week, the atomic clock will not lose a second in several million years.
This increased accuracy, however, has been shown to cause some problems. Because of this precision, it was quickly discovered that the Earth's rotation, what we have based our system of time over the millennia, was not as accurate as our watches.
Given the gravity of the Moon from Earth, the Earth slows down gradually each year. Although this slow rotation of the Earth is less than one second of one year if it was not represented last days slipped into the night and vice versa (although in many millennia), making a forecast useless.
The only solution was to seconds more each year or so on to the international time scale (known as UTC or Universal Time Coordinated). This second jump, as they are called are considered by some as a loophole to keep the correct time and want to abolish, while others (including astronomers from around the world), argue that it is essential to monitor the 'track of night and day .
There are many ways to keep the correct time and the best solution is to use a dedicated NTP server to receive time signals from atomic clock time transmission via a radio signal or GPS. Watches dedicated Ethernet are also available that can receive one hour of an atomic clock.
Monday, January 18, 2010
Atomic clocks: History and Development
Atomic clocks have been with us for over fifty years and most people have heard of them and I know you are very accurate, but how accurate are they and why do we need accurate clock?
Atomic clocks are used by many of us, although we are not aware of. Moment to say is broadcast around the world and collected some time using the NTP server to synchronize the network, are of vital importance for many technologies such as global satellite navigation and the 'schedule of TV signal.
Before the development of more accurate atomic clock timing devices were electronic watches that losing a second or two every week. These have largely replaced mechanical clocks that are less accurate still.
Humanity has always had a fascination for keeping track of time, but knowing the exact time has never been more important. A second or even a difference of minutes will not affect our daily lives.
However, as technology advanced the need for more precise timing is increased. The satellites are expected to navigate and communicate with Earth for hundreds, thousands, even millions of miles away requires an accurate synchronization. The light and radio waves can then travel 300.000 kilometers per second for slight inaccuracies in time can be huge differences.
The first accurate atomic clock was built in Great Britain's National Physical Laboratory in 1955 by Dr Louis Essen, who founded the clock on the oscillation of cesium -133. The idea was actually first conceived in 1879, when Lord Kelvin proposed that the time-keeping based on how they behaved the atoms would be a better way to count time intervals than anything else.
The first generation of atomic clocks (also known as cesium oscillators) used the frequency of an atom oscillates 9,192,631,770 times per second. Model of Essen was the precision of a second every 300 years, but the evolution of cesium oscillator means that it can now achieve a precision of one second every 80 million years.
Yet, as ever more sophisticated technologies, scientists are looking for a better and more accurate clocks. Rubidium clocks do not provide better accuracy than the standard models of cesium, but they are smaller and less expensive (cesium oscillators are usually only in the physics laboratory scale).
Clocks using only a single atom have been developed that provide more accuracy. A clock based on a single atom of mercury has reached an accuracy of one second in 400 million years and is expected to clock a new type of strontium, which uses light will be even better.
The future of atomic clocks is steadily increasing, with a degree of precision, reducing the size and cost of them. The American National Institute of Standards and Technology (NIST) presented a chip the size of atomic clocks, which guarantees a millisecond precision.
Atomic clocks are now part of our life without the time of the signals that transmit to the world that are supported by modern communication and NTP server shopping on the Internet and GPS technology, such as satellite navigation becomes impossible.
Atomic clocks are used by many of us, although we are not aware of. Moment to say is broadcast around the world and collected some time using the NTP server to synchronize the network, are of vital importance for many technologies such as global satellite navigation and the 'schedule of TV signal.
Before the development of more accurate atomic clock timing devices were electronic watches that losing a second or two every week. These have largely replaced mechanical clocks that are less accurate still.
Humanity has always had a fascination for keeping track of time, but knowing the exact time has never been more important. A second or even a difference of minutes will not affect our daily lives.
However, as technology advanced the need for more precise timing is increased. The satellites are expected to navigate and communicate with Earth for hundreds, thousands, even millions of miles away requires an accurate synchronization. The light and radio waves can then travel 300.000 kilometers per second for slight inaccuracies in time can be huge differences.
The first accurate atomic clock was built in Great Britain's National Physical Laboratory in 1955 by Dr Louis Essen, who founded the clock on the oscillation of cesium -133. The idea was actually first conceived in 1879, when Lord Kelvin proposed that the time-keeping based on how they behaved the atoms would be a better way to count time intervals than anything else.
The first generation of atomic clocks (also known as cesium oscillators) used the frequency of an atom oscillates 9,192,631,770 times per second. Model of Essen was the precision of a second every 300 years, but the evolution of cesium oscillator means that it can now achieve a precision of one second every 80 million years.
Yet, as ever more sophisticated technologies, scientists are looking for a better and more accurate clocks. Rubidium clocks do not provide better accuracy than the standard models of cesium, but they are smaller and less expensive (cesium oscillators are usually only in the physics laboratory scale).
Clocks using only a single atom have been developed that provide more accuracy. A clock based on a single atom of mercury has reached an accuracy of one second in 400 million years and is expected to clock a new type of strontium, which uses light will be even better.
The future of atomic clocks is steadily increasing, with a degree of precision, reducing the size and cost of them. The American National Institute of Standards and Technology (NIST) presented a chip the size of atomic clocks, which guarantees a millisecond precision.
Atomic clocks are now part of our life without the time of the signals that transmit to the world that are supported by modern communication and NTP server shopping on the Internet and GPS technology, such as satellite navigation becomes impossible.
Sunday, January 17, 2010
The atomic clock - always accurate
If you look around your home, you will probably see several shots of various sizes. From the look on your hand to the grandfather clock in the living room, and wake up in your room for the computer clock on the desk, almost everyone watches no longer available. And at some point, a few clocks will show exactly the same moment. So how do you know who is really correct?
There are several ways to keep time. The most commonly recognized is based on a movement of the Earth in space. But, these rotations are very large and the possibility of winning or losing second is incredible. A calendar is the most accurate atomic time. Quite simply, measures pulse atomic time and the absorption of electromagnetic waves. In general, the atomic time is considered the most accurate possible.
When you choose an atomic clock, time clock is maintained through the use of radio signals from atomic time closest to maintain the unity and watch. There are several of these devices around the world, including in Colorado, which controls many of the U.S. atomic clock.
Atomic time-keeping has been around for over half a century, but it was only in recent years that the technology is generally available at a reasonable price for the public. Early atomic clocks were very austere models designed for accurate time-keeping devices and nothing more. Today, there are many options if you want precision, without sacrificing beauty.
Grandfather Clocks is one of the most recent advances in atomic clock technology. Because these clocks depends on the oscillation of a pendulum to keep track of time, they are known for saving time immediately after they were injured and lost time that the movement to run down. Some grandfather clocks are no longer dependent on the clock for timing, making them more precise. But more recently, the work of the atomic clock was added in the case of the grandfather clock. As is the case with all the atomic clocks, atomic clocks in the case of the grandfather clock are periodically updated to be completely accurate.
Most people tend to believe that the computer is really right. After all, computers know the date and time automatically, right? But remember that someone has put that date at the beginning of the life of your computer, and you can even have the adequate time for the summer at a given time. If you want your computer clock to be always accurate, you can download a program that will take your computer to periodically check the official time atomic time zone.
Over the centuries, many methods have been developed and many concepts used in the determination of the time. Sundials and hourglasses can give an idea, but a little 'less accurate. The rotation of the sun, locations of stars and rising tides and they have been used to help explain the passage of hours, if they were not sufficiently accurate to count minutes or seconds. The atomic clock is the last stage of 'man to keep precise track of time.
There are several ways to keep time. The most commonly recognized is based on a movement of the Earth in space. But, these rotations are very large and the possibility of winning or losing second is incredible. A calendar is the most accurate atomic time. Quite simply, measures pulse atomic time and the absorption of electromagnetic waves. In general, the atomic time is considered the most accurate possible.
When you choose an atomic clock, time clock is maintained through the use of radio signals from atomic time closest to maintain the unity and watch. There are several of these devices around the world, including in Colorado, which controls many of the U.S. atomic clock.
Atomic time-keeping has been around for over half a century, but it was only in recent years that the technology is generally available at a reasonable price for the public. Early atomic clocks were very austere models designed for accurate time-keeping devices and nothing more. Today, there are many options if you want precision, without sacrificing beauty.
Grandfather Clocks is one of the most recent advances in atomic clock technology. Because these clocks depends on the oscillation of a pendulum to keep track of time, they are known for saving time immediately after they were injured and lost time that the movement to run down. Some grandfather clocks are no longer dependent on the clock for timing, making them more precise. But more recently, the work of the atomic clock was added in the case of the grandfather clock. As is the case with all the atomic clocks, atomic clocks in the case of the grandfather clock are periodically updated to be completely accurate.
Most people tend to believe that the computer is really right. After all, computers know the date and time automatically, right? But remember that someone has put that date at the beginning of the life of your computer, and you can even have the adequate time for the summer at a given time. If you want your computer clock to be always accurate, you can download a program that will take your computer to periodically check the official time atomic time zone.
Over the centuries, many methods have been developed and many concepts used in the determination of the time. Sundials and hourglasses can give an idea, but a little 'less accurate. The rotation of the sun, locations of stars and rising tides and they have been used to help explain the passage of hours, if they were not sufficiently accurate to count minutes or seconds. The atomic clock is the last stage of 'man to keep precise track of time.
Saturday, January 16, 2010
This is what fascinates me with Wall Clocks
When I think about wall clocks, I can hear the chime clock wall of my childhood. What was this topic that made me dream? Most likely the charm of the narrator that the time has always helped me when I went in an uproar.
I am a clock on the wall of fans to decorate a home. E 'modern and nostalgic at the same time. You can find decorative wall clocks, wooden crafts style, which give a touch of warmth to the room: they can be designed in metal to make it fashionable, stylish acrylic to make money, or making stained. I even saw futuristic wall clocks, made from liquids, which have made a very personal and interesting piece.
Do you remember the first time you learn to read the time correctly? Why did we watch instead of a digital clock that I think we learned quickly. In most schools the wall clock time with the narrator is the remaining time, for this reason that the children learn to read the small hours.
Wall clocks are functional, but it is the least of their advantages: they are beautiful and funny. A pendulum wall clock is a perfect gift for the wedding, it's not like you always count the seconds have passed since the happy event. However, you can play the perfect time for the 50th anniversary: the golden wedding.
When I think of funky wall clocks neon. A clock provides the neon light and modern in the room, leaving the sign of the users. On the other hand, if one considers the traditional wall clocks, the pendulum is the first to come to my mind.
Collectors may find it advantageous to buy watches more unusual, unforgettable dance Elvis Presley clock, the clock of Marilyn Monroe, Felix the Cat and the clock moving eyes.
Most of the watches I've seen is easy to install and efficient when it comes to energy savings, in addition to those who need special attention, antique wall clocks. Among the models on average, there are those who seem smart, it automatically switches from standard time to daylight hours and back, if necessary, so that does not require user attention.
One of the most popular and modern design when it comes to wall clocks is the one who is able to check the time on the day of radio frequency, then it would be delivered on time, as may be the case.
I am a clock on the wall of fans to decorate a home. E 'modern and nostalgic at the same time. You can find decorative wall clocks, wooden crafts style, which give a touch of warmth to the room: they can be designed in metal to make it fashionable, stylish acrylic to make money, or making stained. I even saw futuristic wall clocks, made from liquids, which have made a very personal and interesting piece.
Do you remember the first time you learn to read the time correctly? Why did we watch instead of a digital clock that I think we learned quickly. In most schools the wall clock time with the narrator is the remaining time, for this reason that the children learn to read the small hours.
Wall clocks are functional, but it is the least of their advantages: they are beautiful and funny. A pendulum wall clock is a perfect gift for the wedding, it's not like you always count the seconds have passed since the happy event. However, you can play the perfect time for the 50th anniversary: the golden wedding.
When I think of funky wall clocks neon. A clock provides the neon light and modern in the room, leaving the sign of the users. On the other hand, if one considers the traditional wall clocks, the pendulum is the first to come to my mind.
Collectors may find it advantageous to buy watches more unusual, unforgettable dance Elvis Presley clock, the clock of Marilyn Monroe, Felix the Cat and the clock moving eyes.
Most of the watches I've seen is easy to install and efficient when it comes to energy savings, in addition to those who need special attention, antique wall clocks. Among the models on average, there are those who seem smart, it automatically switches from standard time to daylight hours and back, if necessary, so that does not require user attention.
One of the most popular and modern design when it comes to wall clocks is the one who is able to check the time on the day of radio frequency, then it would be delivered on time, as may be the case.
Friday, January 15, 2010
Contemporary wall clock - Sculpture Part of the Present
Last night I was on the phone talking with one of my best friends. Through our many topics that we discussed, he said he was looking for the perfect wall clock contemporary. He said he needed the perfect watch to fit the current style of decor. He went on to describe the furniture and other accessories that were already in the room. He concluded by adding that his search for only part-time law has the lead in vain. His latest statement of mind made me laugh and I was very impressed. He said he will run out of time before running out of options.
Our conversation made me think. What is actually a contemporary wall clock? What makes then your traditional or a clock on the wall of the kitchen? I looked at the definition of contemporary. She says that is modern and features from the present. I found the design simple and geometric style is mainly shared by all contemporary wall clocks. All have clean lines and often mix of tradition and modern design that is the hallmark of contemporary feeling.
The modern features are often obtained using different types of materials such as metal, plastic, fabric or color scheme. The element that stands out was the fact that artists use their imagination to invent new forms and designs that reflect modernism in all its complexity. It may seem like a wall sculpture rather than an image plane. It 'more like a piece of modern art you can show with pride. They seem to set the tone and decor of your home.
A room without a wall clock contemporary does not seem finished. Set one on the wall and immediately transform your house into a home. You can have an elegant and formal or fun carefree. Whatever your choice, will always add an elegant and modern appeal to your room.
Another positive element is that it is a price to fit anyone's budget. You can find them as cheap as $ 20.00 or very expensive. They also sync to hang. They are very light, if you need a hammer and a screw and will be on your wall for all in minutes.
Some models do not have hands, but have all the bold colors and lines in bold. There are some clocks, when placed under the lights, the colors change in hue. I met a company that will custom design the clock. Just choose the color that you like and who will face with this color. One thing is certain, you will not find a drawing on contemporary wall clocks that feature animals, flowers or members of your family.
The development of electronics during the 20th century led to clocks with no clockwork parts at all. Some of the most modern clocks can be reset based on radio or Internet time server that is set on a national atomic clock.
For my formal dining room, I chose a clock today. Believe me, it seems a bit 'grandfather clocks that come to mind. It is made of chrome and metal and is the focal point of the room. When clients come from it is always the main topic of conversation. E 'bells and makes my dog run round every hour. I must admit that sometimes I break out so I cut the sound.
If you need a Housewarming gift, this should definitely be your choice. I'm sure you could find right next to the clock that will enhance and strengthen their decoration.
For a timely display of elegance, functionality and conversation, this choice, the right for you. Make this day to add style and grace to this wall, lifeless. You must keep in mind that only time is suspended.
Our conversation made me think. What is actually a contemporary wall clock? What makes then your traditional or a clock on the wall of the kitchen? I looked at the definition of contemporary. She says that is modern and features from the present. I found the design simple and geometric style is mainly shared by all contemporary wall clocks. All have clean lines and often mix of tradition and modern design that is the hallmark of contemporary feeling.
The modern features are often obtained using different types of materials such as metal, plastic, fabric or color scheme. The element that stands out was the fact that artists use their imagination to invent new forms and designs that reflect modernism in all its complexity. It may seem like a wall sculpture rather than an image plane. It 'more like a piece of modern art you can show with pride. They seem to set the tone and decor of your home.
A room without a wall clock contemporary does not seem finished. Set one on the wall and immediately transform your house into a home. You can have an elegant and formal or fun carefree. Whatever your choice, will always add an elegant and modern appeal to your room.
Another positive element is that it is a price to fit anyone's budget. You can find them as cheap as $ 20.00 or very expensive. They also sync to hang. They are very light, if you need a hammer and a screw and will be on your wall for all in minutes.
Some models do not have hands, but have all the bold colors and lines in bold. There are some clocks, when placed under the lights, the colors change in hue. I met a company that will custom design the clock. Just choose the color that you like and who will face with this color. One thing is certain, you will not find a drawing on contemporary wall clocks that feature animals, flowers or members of your family.
The development of electronics during the 20th century led to clocks with no clockwork parts at all. Some of the most modern clocks can be reset based on radio or Internet time server that is set on a national atomic clock.
For my formal dining room, I chose a clock today. Believe me, it seems a bit 'grandfather clocks that come to mind. It is made of chrome and metal and is the focal point of the room. When clients come from it is always the main topic of conversation. E 'bells and makes my dog run round every hour. I must admit that sometimes I break out so I cut the sound.
If you need a Housewarming gift, this should definitely be your choice. I'm sure you could find right next to the clock that will enhance and strengthen their decoration.
For a timely display of elegance, functionality and conversation, this choice, the right for you. Make this day to add style and grace to this wall, lifeless. You must keep in mind that only time is suspended.
Thursday, January 14, 2010
Turn your Pocket PC clock style
Your Pocket PC (http://ppc.handster.com/) is a cool gadget to play. But it's reason to exist when you are in full cradle, loading or synchronization? Turn your PDA hooked to a waste of space on your desktop in a cool search engine, measuring time with endless possibilities for customization and many features!
During loading and synchronization of the PDA (http://pda.handster.com/) is mostly useless, sitting on a table and holding the already limited space on your desktop. Free some space and get rid of the clock on your desktop, if you have one! You can get a cool, big clock, bright and clean desktop if you install Spb Time (http://handster.com/product.php?id=2) on your PDA. It will give you everything you could want in a device for measuring time: the world watches to show more precisely what is now anywhere in the world, alarms, analog or digital customizable appearance, and more.
Christmas is coming? Just download a special Christmas theme for your PDA clock to get the coolest Christmas ever! You're a Matrix? Get the elegant black-and-green awakening. You want something to class? Check the clock on the Kremlin in Moscow or the clock Big Ben. Arty state of mind? Salvador Dali painted his famous clock liquid, and Spb Diary (http://handster.com/product.php?id=15) animated. It seems really surreal!
Just visit http://www.Handster.com choose from dozens of themes carefully designed to make your desktop clock special look. One application allows you to have a clock in Egypt today and tomorrow Aqua look, a cartoon-style the next day and watch The Day After Picasso - not just on the computer screen, but on your desktop!
I said, you can use Spb Time when you travel, too? Organize your time better and more effectively with customized alerts that, world clock, timers and stopwatches. Control all the functions at your fingertips, thanks to an efficient design Spb Time is optimized for the operation of the fingers. Just touch the screen with a finger to change the look of your watch or to access advanced features such as alarms and timers.
Have you ever thought that your PDA could be used at night during sleep? Spb Time is a gem because it will turn your PDA in one night, perfect for your bedside table!
Place your PDA on your nightstand, alarm clock and more cool and more convenient than ever. Imagine how a CPU dedicated to motor, programmable clock with a large clear screen, high resolution and customized alerts (and we are not talking here beep-beep!) Would go to Radio Shack? You can have for only $ 14.95 if you purchase Spb Time! Wake up with your favorite song - you can download your PDA and select the music files as the alarm by default.
During loading and synchronization of the PDA (http://pda.handster.com/) is mostly useless, sitting on a table and holding the already limited space on your desktop. Free some space and get rid of the clock on your desktop, if you have one! You can get a cool, big clock, bright and clean desktop if you install Spb Time (http://handster.com/product.php?id=2) on your PDA. It will give you everything you could want in a device for measuring time: the world watches to show more precisely what is now anywhere in the world, alarms, analog or digital customizable appearance, and more.
Christmas is coming? Just download a special Christmas theme for your PDA clock to get the coolest Christmas ever! You're a Matrix? Get the elegant black-and-green awakening. You want something to class? Check the clock on the Kremlin in Moscow or the clock Big Ben. Arty state of mind? Salvador Dali painted his famous clock liquid, and Spb Diary (http://handster.com/product.php?id=15) animated. It seems really surreal!
Just visit http://www.Handster.com choose from dozens of themes carefully designed to make your desktop clock special look. One application allows you to have a clock in Egypt today and tomorrow Aqua look, a cartoon-style the next day and watch The Day After Picasso - not just on the computer screen, but on your desktop!
I said, you can use Spb Time when you travel, too? Organize your time better and more effectively with customized alerts that, world clock, timers and stopwatches. Control all the functions at your fingertips, thanks to an efficient design Spb Time is optimized for the operation of the fingers. Just touch the screen with a finger to change the look of your watch or to access advanced features such as alarms and timers.
Have you ever thought that your PDA could be used at night during sleep? Spb Time is a gem because it will turn your PDA in one night, perfect for your bedside table!
Place your PDA on your nightstand, alarm clock and more cool and more convenient than ever. Imagine how a CPU dedicated to motor, programmable clock with a large clear screen, high resolution and customized alerts (and we are not talking here beep-beep!) Would go to Radio Shack? You can have for only $ 14.95 if you purchase Spb Time! Wake up with your favorite song - you can download your PDA and select the music files as the alarm by default.
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