In the office I work you only clock the hours you spend working.
Our military has secured the airport and prepared it to receive the heavy equipment and resources that are on the way, and to receive them around the clock, 24 hours a day.
Study leader Dr Michael Hastings said in mice who by a quirk of genetics had a 20-hr body clock, they were able to reset the clock to 24 hours by using known compounds that are known to slow down the action of cAMP.
Web users spend more than seven hours a month on Facebook, and mobile users clock in lots of additional hours, too.
Jet Lag Rooster encourages travellers to pace themselves accordingly, which means it may take a person travelling between Atlanta and Moscow about seven to 10 days to shift their body clock the necessary 10 hours.
"It's like stepping back in time, " Stevens said of the boat which had notched up just 800 hours on the clock.
The professors -- most of whom teach at more traditional universities -- administer tests and conduct office hours online, offering, at least in theory, office hours around the clock.
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Panorama asks why British workers continue to clock up some of the longest hours in Europe.
The town centre clock is being lit for 12 hours on Monday from 19:00 BST, the time April went missing.
So they end up having to get up one, two, or, in extreme cases, three hours earlier than their internal clock would dictate.
And sometimes, they end up working more hours that they don't clock in.
Firefighters are working 18 hours a day, around the clock, trying to make sure that they get this blaze under control.
Then, at four o'clock in the afternoon, twenty-four hours after the mortar fell on his friends and neighbors while they waited to buy bread, he will bend down and pick up his bow.
For example, many companies depend on large cadres of workaholic professionals and middle managers who put in long hours, are available around the clock, and are willing to sacrifice family and personal time for business activities.
About three hours later, about eight o'clock in the morning, Paul McCartney phoned me in the Newsbeat office.
Avoiding light at certain hours also is important to help the body clock reset.
As the clock on the mantle in his office chimed the quarter hours, he hammered away at their assumptions.
It was now 4 o'clock the morning after the election -- about 22 hours after Daley's morning stop at Dunkin' Donuts -- and Gore's campaign chairman was calm and blunt.
OECD, his German and French counterparts clock up a mere 1, 480 and 1, 467 hours respectively.
Those who miss out on the correcting influence of either of these tend to fall into a spiral in which the body clock gradually becomes more and more out of synch with daylight hours.
In TV terms, ZDTV is a prodigious producer--30 hours of original programming every week, aired around the clock.
It was 4 o'clock in the morning and my wake-up call was in two hours.
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It was thought the band's comeback single, Something New, would be revealed when the clock reached zero on Friday, but it was hastily unveiled on Tuesday hours after it leaked online.
Travellers on long-haul flights, for example to California, which is eight hours behind UK time, take about a week to recover as the body clock can only adjust by one hour a day, he said.
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