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What is the Correct Time? The Development of Time Scales from GMT to UTC and NTP Servers Computers Articles | June 10 John Moore Jersey , 2008
Asking somebody the time may be one of today?s most common questions but have you ever wondered where the time on our watches comes from? ? Accurate clocks have only been around since the m...


Asking somebody the time may be one of today?s most common questions but have you ever wondered where the time on our watches comes from?


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Accurate clocks have only been around since the mid 17th century, before then, time was completely subjective. People would use the celestial bodies as a time reference such as noon (when the sun was highest) and midnight (when the moon is at its highest) and also dawn and dusk. Often lengths of time were referred to in comparison such as the time it would take a man to walk a mile.


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Standard timescales did not exist until the 1840?s when it became necessary during the height of the railway?s popularity when a railway standard time for all England, Wales and Scotland replaced all the local timescales.


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A few years later the Royal Observatory in Greenwich developed its own time scale. This was based on the sun and moon Brandon Carlo Jersey , with 12 o?clock (noon) being when the sun was over the Greenwich Meridian, they began transmitting this timescale using the telegraph and by 1855 most of Britain used GMT (Greenwich Mean Time) and it soon became a recognized time reference throughout the world.


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However, it became apparent with the invention of atomic clocks that basing a time reference on the movement of the Earth was not accurate enough. In 1967 the second was defined by the oscillations of the caesium -133 atom (as used in atomic clocks) and provided the most accurate reference for time yet but attempts to couple GMT with this new definition proved unsatisfactory when it was discovered that the Earth slows (and speeds up) on its axis.


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This variations in the rotation of the Earth meant a new timescale UTC, (Coordinated Universal Time) which made adjustments for this slowing adding (or subtracting) a second when ever necessary (failure to do so would mean eventually day would become night as time would slip Chris Wagner Jersey , albeit in many millennia). This addition is known as a Leap Second.


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UTC has become vital in allowing the global community to communicate with each other. UTC allows the world to synchronise to one time scale regardless of the time zone (UTC handles timezones with a + or minus such as UTC +5 or UTC -2)


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UTC enables computers to synchronise together all over the world using NTP (Network Time Protocol). Without NTP it would be impossible to conduct time sensitive transactions such as buying an airline ticket or bidding on Ebay.


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Most NTP time servers receive UTC time atomic clocks from either a broadcasted signal from a large physics laboratory or via the GPS network.


Keep Track of Your Tools With a Visual Management System Inside Your Travelling Tool Case Business Articles | May 7, 2010
Using a Visual Management System inside your traveling tool case can save you money by preventing tool loss. Insure that you have all the tools you need for a job, and preventing tool breakage with these intelligent systems.


A visual management system for tool?cases?utilizes the?same?inherent logic found in the chalk outlines on every handyman?s garage pegboard. On the pegboard, every tool has its place Anders Bjork Jersey , and the outline shows exactly where it goes. An empty space means your neighbor did not return it after he begged?you?to?borrow?it.


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This system works great in the garage, so why not in your traveling tool case? The use of specialized high-density foams allow for tight packing, and a two-tone foam color will visually highlight any missing tools.?These designs also save space by?allowing you to?discard?the individual boxes for sensitive meters and measurement tools and pack them directly in protective foam.


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With the above foam options, it is also very easy to create one or multiple removable trays.?These trays typically have straps on the ends for easy removal Bobby Orr Jersey , and can be made from all foam, or a combination of foam and plastic. Labeling is another common feature added to these cases. Labeling can take the form of either a placard with?an annotated?picture of the fully packed case,?or a small label attached directly to the foam adjacent to each tool. Placarding can be?permanently?affixed either to the exterior of the case, the interior of the case David Pastrnak Jersey , or both.


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Visual management?systems?can be built into?a variety of quality hard shipping and travel cases such as Pelican, SKB, Parker, and Underwater Kinetics.?For rolling cases Brad Marchand Jersey , spec