And they will study whether it is involving in controlling sleep quantity alone, or also what scientists call the "wakefulness-behavioral drive."

VOA: special.2009.08.26

Mister Miller says that what matters most is not whether the rank of cities changes over the years.

VOA: special.2009.03.27

Instead,it will be based on a simple principle: whether a state is ready to do what works.

VOA: special.2009.07.30

"And no matter where you are in the world, that is a very important thing, to be proud of who you are and be able to let people hear what you have to say, whether they like it or not.

VOA: special.2009.08.05

"If you ask them whether they will receive a pension and what age, they say "I'm not sure whether I will be in the position of pensioners of today."

VOA: standard.2010.06.16

Sierra Leonean law is clear. Anyone who "maliciously" publishes defamatory material could be put in jail for up to three years, whether or not what they have written is true.

VOA: standard.2009.12.28

But observers say there are plenty of unknowns, including whether Iran will cooperate with the tentative deal and to what extent the IAEA will be able to monitor Iran's nuclear efforts.

VOA: standard.2009.10.19

"The Saudis have articulated a lot of reservations about whether sanctions are really going to do anything to keep the Iranians from getting a bomb if that is what they decide to do.

VOA: standard.2010.06.29

On the economic crisis, Mr.Brown said his government faced tough choices on whether and to what extent the government should intervene in financial markets to let the recession run its course or to stimulate the economy.

VOA: standard.2009.09.29

A key question is whether either chamber of Congress will employ what is called the "reconciliation process" aimed at overcoming filibusters,or blocks, in the Senate on contentious measures where a 60-vote majority is usually required to pass major legislation.

VOA: standard.2009.03.24

"It seems that more clarity is likely to emerge about who did what to whom and whether or not war crimes, crimes against humanity and other very serious human rights abuses were committed by one or both sides,"

VOA: standard.2009.10.25

What remains to be seen is whether this will have a long-term effect,positive effect on the security forces, and maybe are there ways we can replicate some of these treatment programs to be more inclusive of the general public."

VOA: standard.2010.06.23

But central to the debate going on in Britain is the very credibility of the Afghan government as more and more question whether British lives should be put at risk in support of what is seen as a less than clean Hamid Karzai government.

VOA: standard.2009.11.04

"God only knows what he wants," "There are all kinds of discussions, whether this is about succession wanting his son to succeed him, and whether or not he is looking for respect, whether or not he really wants a nuclear capability to threaten the region.

VOA: standard.2009.06.14