TEHRAN (FNA)- Researchers report that just four fairly vague pieces of information -- the dates and locations of four purchases -- are enough to identify 90 percent of the people in a data set
recording three months of credit-card transactions by 1.
CDF gives viewers not only the raw data sets
, but also the algorithms that form the relationships among the different data sets
, which then can be harnessed to show how these data sets
When viewed concurrently with each of the other data sets
, deformation data can be used to identify the source of an anomaly.
The charts reveal that data from the 100-screen setup have a relatively small amount of variation, but trend lower for most of the data set
before assuming a new average in the last month.
Restore from disk, sometimes with the benefit of differential maps that negate the need to copy the entire data set
, is faster than tape.
To the GIS user this means no extensive pre-processing of data, such as the division of large data sets
into smaller, more manageable sub-sets.
Sources may be large, nationally representative data sets
such as those of the National Center for Health Statistics or smaller, regional or locally based data sets
To take a fresh look at the gap and its sources, we examined a new data set
, the Early Childhood Longitudinal Study Kindergarten Cohort, compiled by the U.
A homogeneous data set
was determined by Hedges Q statistic.
Both methods proved reliable, as they both returned the same results for all the data sets
in this study.
Second, unlike disk or RAM, tape is inherently sequential and imposes delays on retrieving any file housed on a physical data set
Government agencies should anticipate requests by the general public (including the scientific community) for electronic information and should build features into their electronic information systems so that information most likely to be requested by the public may be actively released (such as publishing data sets
on web servers or CDs along with appropriate retrieval software).