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As the number of regions N ( even integer ) in the binomial distribution is increased , the number of possible perturbed configurations increases rapidly such that the new members of the ensemble are closer to the reference reactor in fuel distribution , and thus each has an eigenvalue keff increasingly closer to 1 . With advanced human-computer interfaces , including the use of computers with voice recognition to control CD-ROM ( Compact Disk - - Read Only Memory ) , such a person could conceivably become an attorney or - - by the use of Computer Aided Drafting - - an architect . Accrual accounting systems recognize transactions or events at the time economic value is created , transformed , exchanged , transferred , or extinguished , and all economic flows ( not just cash ) are recorded . Sack , Clarke and Seeley ( 1995 ) for example , interviewed 118 Khmer adolescent refugees and one of their parents ( usually mother ) .