Interestingly, we could demonstrate that exposure to blue-enriched light was most effective in enhancing cognitive performance for tasks of sustained attention, while no apparent benefit seemed to occur for higher executive cognitive tasks, such as the PVSAT.
Here we demonstrate that the alerting response to polychromatic light in the evening is wavelength-dependent, such that light at 6500K is more effective than light at 2500K and 3000K in reducing subjective sleepiness and enhancing cognitive performance, specifically associated with tasks of sustained attention.
Still, the poll showed how difficult the White House's task of sustaining support for an unpopular war had become.
Mr. Tusk had advocated that course, and the report presents him with the delicate task of sustaining it without alienating Polish voters.
"Any tendency of inflation expectations to become unmoored or for the Federal Reserve's inflation-fighting credibility to be eroded would greatly complicate the task of sustaining price stability and could reduce the flexibility of the F.O.M.C," Mr. Bernanke warned, referring to the Federal Open Market Committee, which sets interest rates.
The family is a little island of people who aren't supposed to have sexual feelings for each other (except for the parents who, in these circumstances, have their work cut out for themselves with the task of sustaining sexual feelings for one another).
"On the other hand, it was uncertain whether the prison doctors would be willing to co-operate; and if intravenous feeding led to all the protesting prisoners coming out on hunger strike, the authorities would be faced with the enormous task of sustaining by such methods indefinitely".
Are today's news organisations "up to the task of sustaining the informed citizenry on which democracy depends?" asked a recent report about newspapers from the Carnegie Corporation of New York, a charitable research foundation.Nobody should relish the demise of once-great titles.
The task of sustaining system-wide action research in the Singapore education seems rather daunting taking into consideration the slew of potential challenges that have been raised above.
The more difficult task of sustaining conservation success will be achieved only with the realization that the well being of both animals and people are inextricably intertwined in the manner in which nature intended.
