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{multi-excerpt:name=UseofBrowsers}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.

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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.

While we cannot currently identify and exclude many web crawler and similar hits, detailed examination of addresses and patterns of use suggest that the bulk of use reported below 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.

h2. 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 visitors to the EVS family of browsers has averaged between 5,000 and 6,000 per month over the past year, generating a total number of visits of between 13,000 and 17,000 per month.

{color:#002060}{*}Unique visitors to EVS browsers, per month{*}{color}
!BrowserVisitors.JPG|border=1,alt=""!

{csv:border=false|delimiter=pipe}
Key:*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)
{csv}


{color:#002060}{*}Number of visits to EVS browsers, per month{*}{color}  
!BrowserVisits.JPG|border=1,alt=""!


h2. Browser Users

The EVS browsers see a large volume of usage each month, therefore only one month was chosen for analysis. The data below is from June 2011, the last full month for which we have data. It shows an overall view of which domains hit us 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 for drawing data and have a similar user base.

h3. Overall Use

The amount of bandwidth used by each of five (5) domains, plus a substantial population for whom no domain was discovered, was totaled and compared.  The domain that saw the greatest use of the browsers was the .net domain, which was surprising at first but not so much on reflection. The heaviest .net users were researched and discovered to be blacklisted. They were likely bots that were trolling for email addresses. Therefore, the .net domain was not broken down any further. The other domains showed real, traceable users performing real work.

{color:#002060}{*}Data accessed (MB) from EVS browsers by domain{*}{color}

|| Domain || MB ||
| gov | 420.81 |
| com | 326.22 |
| edu | 161.50 |
| org | 33.74 |
| net | 629.95 |
| unknown | 553.30 |
\\
{color:#002060}{*}Data accessed (MB) from EVS browsers by domain{*}{color} 
!BrowserMBbyDomain.JPG|border=1,alt=""!

h3. Users from .gov domain

The numbers below show the top non-CBIIT users of the EVS browsers. The browsers are used extensively by CBITT internal editors and staff; those listings have been excluded, while other NCI users have not. The top CBIIT user accessed 3.8 MB of data, enough to put them at number four (4) in this list if they had not been filtered out. Agency names have been provided where they are known.

{color:#002060}{*}Top 10 non-CBIIT .gov EVS browser users: Data accessed (MB)*{color}

|| Host || MB || Agency ||
| fda-hfw-00.fda.gov | 27.81 | Food and Drug Administration |
| icicc.nci.nih.gov | 6.31 | NCI OCE |
| niaid-il-235-5.niaid.nih.gov | 4.87 | National Institute of Allergy and Infectious Disease |
| hg-01741555-lwx.nhgri.nih.gov | 1.27 | National Human Genome Research Institute |
| gc-l01643226.nhlbi.nih.gov | 0.93 | National Heart, Lung and Blood Institute |
| cc1bteb3c01w07.cc.nih.gov | 0.90 | NIH Clinical Center |
| citdecaleggeclt.cit.nih.gov | 0.90 | Center for Information Technology |
| dkd2r683wlp2.niddk.nih.gov | 0.76 | National Institute Diabetes and Digestive and Kidney Diseases |
| dohpxy11.nyc.gov | 0.71 | New York City |
| rok-srajguru1-7.nih.gov | 0.71 |--- |

{color:#002060}{*}Top 10 non-CBIIT .gov EVS browser users: Data accessed (MB)*{color} 
!GovBrowserUsers.JPG|border=1,alt=""!

h3. Users from .com domain

Unlike the .net domain, there were a number of clearly genuine health industry users hitting the EVS browsers from the .com domain. Our top two users were Amgen and Johnson & Johnson. Business names have been provided where known.

{color:#002060}{*}Top 10 .com EVS browser users: Data accessed (MB)*{color}

|| Host || MB || Business ||
| amgen.com | 54.62 | Amgen |
| nncsnjra1fw01-pat.mic.jnj.com | 19.88 | Johnson & Johnson |
| 69-165-131-236.dsl.teksavvy.com | 14.24 |--- |
| philabs.research.philips.com | 13.59 | Philips |
| mx1.wkglobal.com | 13.34 |--- |
| internet.lexis-nexis.com | 11.82 | LexisNexis |
| 71-13-78-2.static.aldl.mi.charter.com | 9.01 |--- |
| 84-55-242-40.adsl.ticino.com | 8.37 |--- |
| brca.parexel.com | 7.74 | Parexel |
| mailx2.ingenuity.com | 7.58 | Ingenuity Systems |

{color:#002060}{*}Top 10 .com EVS browser users: Data accessed (MB)*{color} 
!ComBrowserUsers.JPG|border=1,alt=""!

h3. Users from .edu domain

The edu users were widely distributed across many American universities and a small selection of foreign institutions. The heaviest user, by a factor of 20, is the Mayo Clinic, above all for their activities in the Pharmacogenomics Research Network (PGRN) Ontology Network Resource (PHONT). After Mayo, use patterns become flatter and less varied between institutions. It is not uncommon to see the same institution represented more than once, with queries coming from a variety of internal organizations.

{color:#002060}{*}Top 10 .edu EVS browser users: Data accessed (MB)*{color}

|| Host || MB || Institution ||
| cache2b.mayo.edu | 117.32 | Mayo Clinic |
| evans036.duhs.duke.edu | 5.52 | Duke University |
| hpdcat3114ba.dhcp.hpd.nova.edu | 3.33 | Nova Southeastern University |
| med-ntfs04.bsd.uchicago.edu | 2.75 | University of Chicago |
| guest-dhcp-117.bmi.utah.edu | 2.51 | University of Utah |
| inetnar10x.ft28.upmc.edu | 2.23 | University of Pittsburgh Medical Center |
| dhcp-195-228.resnet.uab.edu | 1.63 | University of Alabama at Birmingham |
| dhcp-131-216-46-75.dhcp.unlv.edu | 1.36 | University of Nevada, Las Vegas |
| upci-opi92.hillman.upmc.edu | 1.21 | University of Pittsburgh Medical Center |
| lane-ts-dick.stanford.edu | 1.16 | Stanford University |


{color:#002060}{*}Top 10 .edu EVS browser users: Data accessed (MB) \[Mayo truncated\]*{color} 
!EduBrowserUsers.JPG|border=1,alt=""!

h3. Users from .org domain

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

{color:#002060}{*}Top 10 .org EVS browser users: Data accessed (MB)*{color}

|| Host || MB || Organization ||
| mail.c-path.org | 2.48 | Critical Path Institute |
| mb-129-83-31-3.mitre.org | 2.37 | MITRE |
| vpn.nmdp.org | 2.09 | National Marrow Donor Program |
| dhcp071038.fhcrc.org | 1.99 | Fred Hutchinson Cancer Research Center |
| host8.ifmc.org | 1.89 | IFMC |
| bwhmaincampuspat14.partners.org | 1.88 | Partners Healthcare |
| w0045269.partners.org | 1.60 | Partners Healthcare |
| webmail.web.stjude.org | 1.12 | St Jude Children's Research Hospital |
| fx.mskcc.org | 0.99 | Memorial Sloan-Kettering Cancer Center |
| vpn.petermac.org | 0.90 | Peter MacCallum Cancer Centre |

{color:#002060}{*}Top 10 .org EVS browser users: Data accessed (MB)*{color} 
!OrgBrowserUsers.JPG|border=1,alt=""!

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