On the other hand, the first cross-correlations of a heteroscedastic series contaminated with one single outlier as big as 15 or 20 could be confused with those of a white noise.
As we can see, when a series generated by the EGARCH model is contaminated with one single large negative outlier, we may wrongly conclude that there is not leverage effect since all the cross-correlations become nearly zero.
However, some of them were performed using a two-phase method, in which, first, the connectors were contaminated with a single known microorganism (such as S. aureus or S. epidermidis, which is commonly associated to catheter infection) at different concentrations and, second, they were manipulated to instill contaminated infusion fluids [3],[3],[3],[3],[3]],[3]].
Open image in new window Fig. 2 Monte Carlo means of sample cross-correlations of order 1 (first row) and of order 2 (second row) for white noise (first column) and EGARCH series (second column) contaminated with a single negative outlier and with two consecutive outliers, negative and positive, as a function of the outlier size.
Each data set was contaminated with a single extreme or outlier observation according to the procedure described in [ 1].
In that study, analysis of pooled CTCs, enriched from the blood but still contaminated with leukocytes, was accomplished using single-molecule RNA sequencing, combined with digital subtraction of matched leukocyte RNA reads, so as to derive a CTC-specific expression signature.
The only cheese found to have been contaminated with Listeria so far was a single round of the Joan of Arc brand that was being routinely examined by an F.D.A. agent in Cincinnati.
Bell peppers and grapes were both commonly contaminated with 15 different pesticides in a single sample -- the highest overall diversity of contamination.
Here where I live in the Bay Area, where we're a bunch of iphone-toting-treehuggers, every single creek is contaminated with high levels of pesticides including diazinon, a chemical that was banned almost ten years ago because of its toxicity to mammals.
All outbreak isolates obtained for this study shared the 2-SNP Ba4599 genotype, suggesting that the outbreak originated from a batch of heroin that was contaminated with B. anthracis spores from a single point source.
