Since my graduate-school days in the early 1980s, I have monitored the literature in my field (thermal physiology and circadian biology) through computerized literature searches. Since 1992, I have used a professional literature awareness service to help me keep up with the burgeoning research literature. The service I use is Personal Alert, which is provided by the Institute for Scientific Information (ISI) in Philadelphia, but many other services are available from ISI and from various other companies.
ISI searches an average of 24,000 research articles each week based on search terms that I deemed to be optimal and provides me with a list (containing abstracts and authors' addresses) of about 20 potential articles each week. Usually, two or three of these 20 articles are of actual relevance to me. As a result, I send out an average of 114 reprint requests each year. Based on my own research on literature ...