3 - Use of Browsers and LexEVS Local Java API on EVS Servers

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The next several sections analyze available statistics for direct use of EVS resources on EVS servers. This section covers direct use of NCI-hosted EVS terminology browsers and the LexEVS local java API that supports them. Later sections cover the LexEVS distributed (remote), LexEVS caGrid services, the term suggestion site, and ftp download services.

The EVS browsers and LexEVS APIs at NCI are covered by the AWStats and Wusage applications, recording various statistics including number of unique visitors, visits, number of pages viewed and data volume accessed. These have been collected below to give a window into the use of the EVS services. Appendix 1 lists the usage tracking pages from which these statistics are gathered.

We are now able to identify and exclude most web crawler and similar automated hits, as well as internal use for testing and development purposes. Detailed examination of addresses and patterns of use suggest that the use reported below overwhelmingly represents real users from NCI and other organizations of interest. Analyzed below are figures for unique visitors and number of visits, as well as the volume of data communicated, which for all but ftp sites reflects high volumes of traffic in mostly compact units of terminology concept data.

Statistical Overview

The EVS browsers run off the LexEVS local API, and provide the highest number of direct users of EVS terminology servers. The lowest, but most informative, numbers are for unique visitors and number of visits. The number of unique visitors to the EVS family of browsers has averaged around 4,000 per month over the past year, generating a total of around 7,000 visits per month.

Unique visitors to EVS browsers, per month

Key

Abbreviation	Site
NCITerms	NCI Term Browser (many terminologies, value sets and mappings)
NCIt	NCI Thesaurus Browser (now one face of NCITerms, counted separately)
NCIm	NCI Metathesaurus Browser (separate app, searchable from NCITerms)
TermForm	EVS Term Suggestion site (covered later)

Number of visits to EVS browsers, per month 

Browser Users

The EVS browsers see a large volume of usage each month, so only one 3-month period was chosen for detailed analysis. The data below is from January 2012 through May 2012, the last full quarter for which we have data. It shows an overall view of which domains hit EVS browsers most heavily, and then breaks down each domain by top users. All browsers are put together for this analysis, as they all use the same API to get data and have a similar user base.

Overall Use

The amount of bandwidth used was divided into four (4) major groups: Government .gov users, private .com and .net users, Educational .edu institutions, and Organizations .org. The data was analyzed and bots were discarded to avoid skewing the data.

Data accessed (MB) from EVS browsers by domain

Domain	MB
gov	Unknown macro: {align} 14644
edu	Unknown macro: {align} 11575
com/ net	Unknown macro: {align} 3422
org	Unknown macro: {align} 436

Data accessed (MB) from EVS browsers by domain

Users from .gov domain

The numbers below show the top government users of the EVS browsers, as measured by the MB of data that were accessed. Agency names have been provided where they are known.  The main users are internal to NCI and NIH, which is not surprising, but we have significant usage from FDA.

Top .gov EVS browser users: Data accessed (MB)

Organization	MB
NIH-NCI	Unknown macro: {align} 9270
NIH	Unknown macro: {align} 4840
FDA	Unknown macro: {align} 357
State of Montana	Unknown macro: {align} 43
California Department of Health Care Services	Unknown macro: {align} 28
NIH-NLM	Unknown macro: {align} 27
NIH-OD	Unknown macro: {align} 11
Social Security Administration	Unknown macro: {align} 9
NIH-NIDA	Unknown macro: {align} 8
NIH-NHLBI	Unknown macro: {align} 8
NIH-NIDDK	Unknown macro: {align} 7
NIH-NIMH	Unknown macro: {align} 6
NIH-CIT	Unknown macro: {align} 6
NIH-NHGRI	Unknown macro: {align} 5
NIH-Clinical Center	Unknown macro: {align} 4
Unknown	Unknown macro: {align} 4
NIH-NEI	Unknown macro: {align} 3
Government of Alberta, Canada	Unknown macro: {align} 2
NIH-OD, Office of Research Services	Unknown macro: {align} 2
NIST	Unknown macro: {align} 1

 Top .gov EVS browser users: Data accessed (MB)

Users from .com domain

We combined the .net and .com users into one group as both contained a number of private corporations and individual users from a wide variety of ISPs (collectively labeled as ISP). Business names have been provided where known. The graph below does not fully show ISPs and Lockheed Martin as they dwarf the next largest group.

Top .com EVS browser users: Data accessed (MB)

Business	MB
ISP	Unknown macro: {align} 1968
Lockheed Martin	Unknown macro: {align} 187
Walgreens	Unknown macro: {align} 144
Ingenuity Systems	Unknown macro: {align} 120
BOT	Unknown macro: {align} 92
LexisNexis	Unknown macro: {align} 68
Genentech	Unknown macro: {align} 60
IBM Rochester	Unknown macro: {align} 55
Johnson and Johnson	Unknown macro: {align} 44
Aetna	Unknown macro: {align} 35
Amgen	Unknown macro: {align} 34
Booz Allen Hamilton	Unknown macro: {align} 32
Kai Reseach	Unknown macro: {align} 32
Roche	Unknown macro: {align} 32
IBM Watson Research Center	Unknown macro: {align} 30
SAIC	Unknown macro: {align} 28
McKesson	Unknown macro: {align} 24
HP Labs	Unknown macro: {align} 23
Bristol-Myers Squibb	Unknown macro: {align} 23
PAREXEL International	Unknown macro: {align} 22
CSC	Unknown macro: {align} 20

Top .com EVS browser users: Data accessed (MB)

Users from .edu domain

The edu users were widely distributed across many American universities and a small selection of foreign institutions.

Top .edu EVS browser users: Data accessed (MB)

Institution	MB
San Diego Supercomputer Center	Unknown macro: {align} 8117
Mayo Clinic	Unknown macro: {align} 2747
University of Chicago	Unknown macro: {align} 228
University of Pittsburgh	Unknown macro: {align} 63
University of Wisconsin	Unknown macro: {align} 54
MD Anderson Cancer Center - University of Texas	Unknown macro: {align} 48
University of Nebraska Medical University	Unknown macro: {align} 44
Protein Information Resource	Unknown macro: {align} 23
University of California, San Francisco	Unknown macro: {align} 19
University of Utah	Unknown macro: {align} 16
University of Tennessee College of Medicine	Unknown macro: {align} 16
Vanderbilt University	Unknown macro: {align} 15
Johns Hopkins Medicine	Unknown macro: {align} 11
Harvard University	Unknown macro: {align} 11
Florida Atlantic University	Unknown macro: {align} 10
University of Wisconsin College of Engineering	Unknown macro: {align} 10
University of California, San Diego	Unknown macro: {align} 10
Protein Information Resource	Unknown macro: {align} 9
University of Maryland	Unknown macro: {align} 9
Case Western Reserve University School of Medicine	Unknown macro: {align} 8

Top .edu EVS browser users: Data accessed (MB) [Mayo truncated]

Users from .org domain

Like the .edu users, the .org users were widely distributed across a variety of organizations.

Top .org EVS browser users: Data accessed (MB)

Organization	MB
Partners HealthCare	Unknown macro: {align} 56
Fred Hutchinson Cancer Research Center	Unknown macro: {align} 45
American College of Cardiology	Unknown macro: {align} 37
Sloan-Kettering	Unknown macro: {align} 32
Unknown	Unknown macro: {align} 26
caphealth.org	Unknown macro: {align} 24
Cleveland Clinic	Unknown macro: {align} 20
The MITRE Corporation	Unknown macro: {align} 14
RTI International	Unknown macro: {align} 13
City of Hope	Unknown macro: {align} 13
Lenoir Memorial Hospital	Unknown macro: {align} 9
Hendrick Medical Center	Unknown macro: {align} 8
The Jackson Laboratory	Unknown macro: {align} 8
Alfred Mann Foundation	Unknown macro: {align} 7
Southwestern Medical Center	Unknown macro: {align} 6
Group Health Cooperative	Unknown macro: {align} 5
Benefits Interface	Unknown macro: {align} 5
Lifepath Hospice	Unknown macro: {align} 5
Healthfirst	Unknown macro: {align} 5

Top .org EVS browser users: Data accessed (MB)