Advisers to the nation on science engineering and medicine the national academy of sciences is a private nonprofit self perpetuating society of distinguished scholars engaged in scientific and engineering research dedicated to the furtherance of science and technology and to their use for the general welfare upon the authority of the charter granted to it by the congress in 1863 the . Copy the html code below to embed this book in your own blog website or application an uncorrected copy or prepublication is an uncorrected proof of the book we publish prepublications to facilitate timely access to the committees findings the final version of this book has not been . An extensive treatment of false positives and false negatives and the trade offs thereby implied can be found in national research council the polygraph and lie detection the national academies press washington dc 2003 31 the score calculated by any given system may simply be an index with only ordinal rank ordering properties. Counterterrorism programs 1 and it provides a framework for making decisions about deploying and evaluating those and other information based programs on the basis of their effectiveness and associated risks to personal privacy the most serious threat today comes from terrorist groups that are international in scope these groups make use of the internet to recruit train and plan . The information collected for a program must be appropriate to its purpose data minimization requires that only information critical to that purpose be collected though minimization often conflicts with the temptation to gather more information just in case it might be useful later in easing the relevant analytical tasks or even for other possibly relevant purposes
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