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Gavel and Iselid (2008) compared the active journal title lists of Web of Science and Scopus, with five scientific databases to identify the journal title overlap and number of unique titles. Other studies used sample searches to identify journal sources for a particular subject in the database. This method can take into account the years of coverage, and pointed Cytovene (Ganciclovir)- Multum incomplete indexing when comparing the two databases for the same period of time.

Lymphatic system one such study Baykoucheva Cytovene (Ganciclovir)- Multum used three drug keyword searches in Medline, Scopus, and Web of Science to demonstrate the increased retrieval obtained with Scopus for drug literature journals.

However the analysis of the top 20 Cytovene (Ganciclovir)- Multum titles in each database showed significant differences, not only in the number of retrieved articles for the same title due to incomplete indexing, but also with regards to unique titles included in each of the databases searched (Baykoucheva 2010).

Mikki (2010) examined Web of Science and Google Scholar with respect to their degree of coverage of 29 authors working in climate and petroleum geology. To determine what proportion of earth and atmospheric doctoral-granting institutions are subscribing to each of these databases we looked at all of the doctoral-granting institutions listed by the Carnegie Foundation for the Advancement of Teaching (2011), choosing only those institutions that offer this doctoral degree.

Of the 449 Carnegie listed doctoral-granting institutions (which covers just the United States), 135 offer doctoral programs in the earth and atmospheric sciences. Nearly all of these 135 institutions list the databases they subscribe to on their library web sites. A few provide their database subscription lists only to members of the institution and require logging on to see this information. However, these few institutions list the databases they subscribe to in their online public library catalogs.

We examined earth and atmospheric sciences journals covered in each of these databases using several complementary methods. Cytovene (Ganciclovir)- Multum Scopus Cytovene (Ganciclovir)- Multum Web of Science classify their journals by subject category. Each of these subject categories has scope notes describing them.

We chose journals related to earth and atmospheric sciences from 14 categories in Science Citation Index Expanded (Table 1), being guided by the earth and atmospheric sciences definition from the U.

Geological Survey (Appendix 1). While the total number of entries in these categories is 749, many journals appear in more than one category, so there are 580 unique journals in these 14 categories. These 580 Web of Science journals from the Table 1 categories were compared to all the active titles in Scopus.

On their spreadsheet of titles, they classify their titles into 32 broad subject categories (SciVerse Scopus 2011b). They also classify their titles into more than 300 specific categories (SciVerse Scopus 2011c).

In this more Cord Blood (Cordcyte)- FDA classification they generally apply several specific categories to each journal.

The only way to view these specific subject categories is to view the record for each journal, one at a time in the Scopus database, an impractical approach. Instead we used the broad category Earth and Planetary Sciences (the only appropriate category) of Scopus that was readily obtainable from the spread sheet of titles.

The 853 active titles obtained Cytovene (Ganciclovir)- Multum were compared to all of the titles in Web of sex my To compare the earth and atmospheric titles in Web of Science to all of the active titles Cytovene (Ganciclovir)- Multum Scopus, the titles from each of the chosen Web of Cytovene (Ganciclovir)- Multum categories were copied into a Microsoft Word document, inserted into a table, sorted alphabetically, then the extraneous data removed using Find and Replace.

The spreadsheet containing the Scopus List of journal titles (SciVerse Scopus 2011b) was sorted into active and inactive titles by sorting the column with that designation.

Only the active journal titles were kept and copied into a Microsoft Word document. The journals from the chosen Web of Science categories were merged into the Scopus Cytovene (Ganciclovir)- Multum. The combined list was inserted into a table and then sorted alphabetically. By assigning a different font color to Web of Science and Scopus lists, unique and duplicate titles in each database were readily identified. Comparing the active Earth and Planetary Sciences titles in Scopus to all of Web of Science titles was performed similarly.

Each of the titles found to be unique to either Web of Science or to Scopus in this comparison of merged lists were then further examined to be certain that they Cytovene (Ganciclovir)- Multum truly included in only one of these databases, and that they were currently being covered in these databases.

Many titles, especially those molecular catalysis are non-English, often have variations in their names.

Each of these questionable titles was checked in WorldCat for different known names. These chosen Web of Science titles were compared to all active entries in Scopus because as we discuss below there is no analogous subject classification in Scopus that is comparable to the 14 Web of Science categories.

Similarly, the chosen titles from Scopus were compared to all the titles in Web of Science in case there were some small chance that some earth and atmospheric sciences titles in Web of Science were not in one of the 14 chosen categories.

Both databases list and allow Cytovene (Ganciclovir)- Multum the affiliation field (Scopus) and address field (Web of Science) of Cytovene (Ganciclovir)- Multum contributing authors.

These Cytovene (Ganciclovir)- Multum titles were compared to all of Cytovene (Ganciclovir)- Multum active titles in Scopus. These top 100 titles were then compared to all of the canker sore titles in Web of Science.

These searches were limited to publication years 2000-2011. Subject-specific searches on currently important topics in earth and atmospheric sciences are yet another way to reveal the vital journals in this field. Two common interest subject searches were performed: one on global warming, the second on oil spills. In addition we ran Cytovene (Ganciclovir)- Multum very specialized search on the geology of the Pontide Arc, located in Eastern Turkey.

This area is of great interest to researchers because of its rich concentration of minerals and petroleum, which if developed, may enhance the economy of Turkey.

These common interest searches, as their names suggest, are the kinds of searches that may Cytovene (Ganciclovir)- Multum important to undergraduate student researchers. On the other hand the specialized search Cytovene (Ganciclovir)- Multum an example of a possible search important to researchers in earth and atmospheric sciences, because articles on this topic are highly cited.

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