Guards sometimes abandon their posts, and at one location an alarm system works only half the time.
But interferon-ribavirin regimens clear the most common strain only half the time at most and cause an array of nasty side effects.
Sadly, the main affordable weapon in the hospital's arsenal is pyrimethamine-sulfadoxine, a 30-year-old drug cocktail that works only half the time against drug-resistant strains common in this part of sub-Saharan Africa.
Sadly, the principal affordable weapon in the hospital's arsenal is pyrimethamine-sulfadoxine, a 30-year-old drug cocktail that works only half the time against the drug-resistant strains common in this part of sub-Saharan Africa.
Mathematical modelling suggests that if microbicides were used by only 20% of women at risk, and were used only half the time, this would still prevent more than 2.5m infections over three years.
Since 1998, Joe has beaten Jane only about half the time.
FORBES: 300 Years Of Data Confirms Winning Strategy: Buy Stocks Now, Sell In May
It's sweet, but I find it hard to forget how awful you could be jacking up your rates out of the blue, charging me a monthly fee for a DVR that only worked half of the time.
This type of uncertainty in decision making exists even when their are clinical guidelines for treatment because such guidelines are only followed about half the time.
The trustees of pension funds, the country's biggest shareholders, use their votes more than they used to do, but still vote (on all issues) only about half of the time, says Ann Robinson, head of the National Association of Pension Funds.
After a scoreless first half - for only the fourth time since the Premiership started in 1997 - the Sharks scored three second-half tries.
Even the most proven, effective treatments are only given to patients half of the time.
Interestingly, of those who do see gorilla the first time around, only about half count the number of passes correctly.
Developing even the most complex device needs only a third of the money and half the time required by a fancy new drug.
"We believe it is a positive reflection on our design process and disciplined, long-term planning that enabled us to increase prices for the first time in four years at only half the rate of inflation, " said George Blankenship, vice president of worldwide sales and ownership experience.
ENGADGET: Tesla boosts Model S base price by $2,500 for new 2013 orders
He took a chance, knowing the engine had only kept him in the air for half the required time during his trials.
BBC: News | Europe | Flight re-enactment fails to reach beach
Jennings was held without a first-half basket for only the fifth time all season.
Coton Sport youngster Edgar Sally scored on the only goal of the game on the stroke of half-time.
Green, the nation's leading scorer at 25.2 points per game, took a painful spill in the first half and scored only 16 just the third time this season he has been held below 20.
Porto had shown some threat on the break, but the real danger was coming from Arsenal and Arshavin should have tightened their grip on the game 12 minutes before half-time, only to fire carelessly over the top of an open goal after fine work by Nasri.
Leon Osman gave the home side a half-time lead only for Darren Bent to equalise straight after the restart.
The two sides have been in talks about the current weapons package for some time, and the sale is only half what Taiwan requested.
Organizers have had to deal with late snows before, but this is only the fifth time in half a century that they have had to cancel an event.
Michael Dobson and Ben Galea restored the home lead by half-time, only for Luke Dorn and Lee Mitchell to again redress the balance.
And it looked as if their season was getting worse as they appeared to be heading out of the FA Cup when Frank Lampard put Chelsea ahead in the first half of extra time and the Toffees still trailed with only two minutes remaining.
With a goal cushion, Bolton's advances became fewer and it took time for Everton to wrest more control of the game, with Arteta's shot the only tangible effort before half-time.
The MSCI Emerging Markets Index is only about a half of a standard deviation from its mean over the same time frame.
But the lead lasted only six minutes, as Barkley landed a penalty on the stroke of half-time.
The dot faded to transparent over time, and would redden again only when the other half of the couple clicked on his or her own dot displayed on a computer screen hundreds of miles away.
Naeem played the type of consolidating innings his team needed, reaching 50 from 150 balls, only the second time in their Test history that four Bangladesh batsmen had made half centuries in the same innings.
Because of the need for repairs, only half of the six Sea Harriers on Illustrious may be usable at any one time.
应用推荐