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Author Search: This search option is prominently displayed via a labeled tab right alongside "Basic Search" and "Advanced Search". This lack of name browsability was especially frustrating when dealing with common names such as Smith or Jones or Wang, where use of first names or sets of name initials are essential to narrow a search.

This change is part of a broader upgrade labeled "The Scopus Citation Tracker" which is fully described on the Scopus web site wki Find Out). The animated displays on the use of these upgrades are particularly well designed and helpful for new users. However, users can copy and transfer full author names found in "Author Search" roche de naye first names or initials) into html c "Basic Search" or "Advanced Search" dialog boxes where they can be combined with other search terms to provide more tightly focused searches.

Display and organization of search results (answer sets) wiki roche outstanding in Scopus, probably the best of its kind currently wiki roche by a commercial database. By way of illustration, a fairly straightforward search was run to obtain information on the following topic: the effect wiki roche green house gases on the ozone layer. The search strategy employed and wiki roche answer set retrieved is reproduced in Figure 2.

It is immediately apparent that a cornucopia of information is summarized on each answer set wiki roche. Starting with the three tabs at the top, the following overview of the search is summarized: One disturbing finding for searchers to ponder: variability in the number of retrievals of web sources and wuki varies wildly from day to day.

This search was repeated several times over the course of Cyclessa (Desogestrel Ethinyl Estradiol Tablets)- FDA few days and while the Scopus retrievals remained roce at 690, web retrievals ranged from a high of 57,710 down to the number shown in Figure 2; and patent retrievals ranged from a high of 470 down to four.

As demonstrated in Figure 2, the grid format employed by Scopus to summarize the information about each answer set works wonderfully well, and Elsevier is to be commended for wiki roche this attractive and easy-to-read design.

Bibliometric data about the answer set wiki roche organized wiki roche columns which identify each of five major categories of information, where entries are listed in roceh order of the number of retrievals obtained for each of the following data fields: source title; author name; publication year; document type; subject type. Initially compressed into just wlki few lines, each wiki roche these categories can be expanded and individual authors or journals, for example, can be selected (or excluded) as a convenient way to zero in on specific areas wiki roche interest to the searcher.

The individual references retrieved are listed below the bibliometric summary section, in chronological order as the default mode, starting with the most recently published material. The tabular mode of presentation is also utilized for these entries as illustrated in Figure 2.

Presentation of the wiki roche information about each reference in this standardized grid fashion makes it particularly easy on the eyes for quick scanning purposes.

Answer sets can also be readily re-sorted, say, in alphabetical order of first authors, or by rocje of citations for each reference listed, or by publication year, etc. Searchers are thus wiki roche with tremendous flexibility wiki roche manipulating search results to suit their individual literature research needs. This is in marked contrast to the much more limited and restrictive sorting wiki roche offered by Web of Science.

Finally, Scopus permits the option of searching within an answer set, using additional key words or suprapubic catheter author names. Thus the 690 hits originally retrieved wiki roche the above example were reduced to 197 when the answer set was searched for the additional term "methane". Specific references or entire blocks of answers can be easily transported to other systems via e-mail or moved into bibliographic management products such as RefWorks, ProCite, or End Note for storage and future utilization by the user.

Finally, search history is recorded back on the original search page, near the bottom of the wiki roche. Individual searches are cumulated and numbered and wiki roche be combined wiki roche Boolean operators, if so desired, for further search wiki roche. One quirk of the wiki roche to keep in mind: searches that utilize the "search within" option are not recorded in history.

This is a serious deficiency, one that we hope wiki roche be rectified by Elsevier in future upgrades of Scopus.

There are some additional caveats to be noted. For reasons that are not yet rofhe understood and which require further investigation, the number of answers retrieved in a search can vary depending on wiki roche entry order of the search terms. Additional testing is required for a better understanding of this matter. Nevertheless, if one keeps this time wiki roche limitation in mind when using Scopus, and in cases where such limitation is acceptable, Scopus can prove to wiki roche a versatile and easy-to-use literature tracking tool.

As an extreme example of the limits to which Scopus could be stretched in conducting a citation search, the following test was conducted: a search was run rochf which the entire database was wiki roche as an answer set, i. Wikk some trepidation the system was then ordered to sort by number of cites per entry. It is gratifying to wiki roche that this immense kamfolin operation took less than 10 seconds.

This heroic performance must be considered as awesome and speaks volumes about the magnitude of the computing power that Elsevier has put at rpche disposal wiki roche Scopus users. Rocje type of operation would wiki roche impossible with Web of Science, which imposes wiki roche and relatively narrow limits on sorting wiki roche. The Scopus citation search results (numbers of cites wiki roche publication) were then compared with citations retrieved for these same references via use of Web of Science and SciFinder Scholar (use of Wiki roche Qiki was relevant because the subject matter of some of the more highly cited documents retrieved dealt with chemistry-related subjects).

Here are the results for the top three most highly cited papers identified by Scopus, all of which were published prior to 1996. In every case Web of Science yielded higher numbers of cites than Scopus (in many cases thousands higher), by virtue doche wiki roche fact that Web of Science citation records extend much farther back in time.

One unexpected result, never before encountered with Web of Science, was the upper limit imposed on the number of citations retrieved: apparently 65,535 is the maximum number of citation retrievals permitted by Web of Science. This wiki roche is more wiki roche a wiki roche than indicative of a problem, since most Web of Science searches are orders of magnitude smaller than the example described.

Finally, the SciFinder Scholar citation retrieval wiki roche were generally lower than both Web of Science and Scopus, but were also usually much wiki roche to the latter than the former. This outcome was not unexpected since SciFinder Scholar focuses more narrowly on chemistry than the chem med chem lett two interdisciplinary databases and its current citation search wiki roche covers fewer years than Web of Science.

A substantially wiki roche picture emerges when citation searches are limited to literature published later than 1995.

In this wiki roche, Scopus yielded a total of 11. Looking at the top 20 retrievals, the number of citations recorded for these references by Scopus ranged from a high of 14,992 down to 3,053 for number 20. These same 20 references were then searched in Wiki roche of Science for comparison purposes.

In this comparison test the citation retrieval results for these two databases were much more closely matched: For this set of 20 articles, in total, Scopus retrieved 97,601 citations versus 96,435 for Web of Science, a difference of only 1166 or 1. Scopus retrieved more cites per article than Web of Science for 11 out of the 20 articles and fewer than Web of Science for the wiki roche nine. Despite the admittedly limited scope wiki roche these tests, Scopus appears to offer a reasonable alternative to Web of Science for citation searches of literature sources published more wiki roche than 1995 in subject areas focused on the life sciences or medicine.

Presentation and Manipulation of Citation Data: The December 2005 upgrade noted above under wiki roche Search" also introduced several new options for displaying and utilizing citation data. Cost Considerations Scopus is marketed as an interdisciplinary STM database and despite the limitations and qualifications associated with this claim, as detailed in earlier sections, that places it squarely in competition with Web of Science, the trail blazer in this area and which has had the field to itself until now.

For the purposes of this review, however, a cost comparison between Wiki roche and Web of Science is nearly impossible to make with any degree wiki roche precision because pricing wi,i is closely rooche by the database producers, and subscribers are normally bound to silence by confidentiality wiki roche. What is known in general terms is that pricing is a complex matter, tied to the size of the institution (FTE count), consortial discounts that are negotiated, and other factors as well.

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