C.B. Wasike, A.K. Kahi & K.J. Peters 1 Department of Animal Science, School of Agriculture and Food Security, Maseno University, Private Bag, 40105 Maseno, Kenya; 2 Animal Breeding and Genetics Group, Department of Animal Sciences, Egerton University, P.O. Box 536, 20115 Egerton, Kenya; 3 Animal Breeding and Genetics Consultant, Sheep and Goat Association of BerlinBrandenburg, Dieselstr. 10, D ...

De Montjoye et al. (Reports, 30 January 2015, p. 536) claimed that most individuals can be reidentified from a deidentified transaction database and that anonymization mechanisms are not effective against reidentification. We demonstrate that anonymization can be performed by techniques well established in the literature.

PTU-220 Table 1 Quality of bowel preparation Good Satisfactory Poor No. colonoscopies (%) 2458 (77.8) 1361 (30.6) 623 (14.0) Polyp detection (%) 536 (21.8) 285 (20.9) 132 (21.2) Mean no. polyps (range) 0.48 (0e20) 0.44 (0e9) 0.44 (0e9) Mean no. polyps detected (where present) [median] 2.21 [2] 2.11 [2] 2.06 [1]

We prove that a language of a finitely generated free monoid is regular if and only if it satisfies the positive block pumping property. This gives a positive answer to a problem posed by Ehrenfeucht, Parikh, and Rozenberg [SIAM J. Comput., 10 (1981), pp. 536–541].