Key points are not available for this paper at this time.
Click to increase image sizeClick to decrease image size ACKNOWLEDGMENTS The authors would like to thank NEDO, a Japanese international joint research program, for sponsoring the research requiring a review of this literature, the U.S. Department of Education for a GAANN Fellowship for MCJB, and the NSF for an equipment grant (CTS–9311087) used to acquire the DRIFTS system which provided some of the cited results.
Bradford et al. (1999) studied this question.