The first edition was published in 1991 (a period of nervous Marxist readjustment, after the fall of the Evil Empire).
Moreover, most of the systems have been published in a short period of time.
The studies were published in a broad period of time, between 1991 and 2011.
Essentially, we used a corpus of titles of papers published in a certain period to predict what will be the major topics (represented as n-grams) in the future.
In particular to this study, one should take into account that the quantitative review was carried out with studies that, although published in a relatively short period of time (from 1986 to 2002), have variation in diagnostic criteria used and have different methodological rigor.
With this analysis we intended to characterize the consideration of children in U.S. EPA regulations published over a period of > 8 years.
In particular, a recent meta-analysis including 27 articles on alcohol drinking and stomach cancer published over a period of 15 years resulted in an overall RR of 2.03 [95% CI: 1.74-2.37] [ 19].
Results based on 14,524 articles published in the period of 1973 2010 demonstrated an increasing trend in the number of articles.
In the subsequent subsections, we discuss various techniques, design geometry and their accuracies in determining the crystallographic directions which have been published in the period of more than two decades.
The annual number of documents published in the period of publication (1980 2013) indicated that research production from Arab World was low in the earliest two decades but showed a noticeable increase in the recent decade.
