Use Statistics for MolVis Freeware Website

Use Statistics for Molecular Visualization Freeware Websites
authored by Eric Martz

Martz-authored molecular visualization resources are visited every minute, on average, 24 hours/day, 7 days/week, 52 weeks/year (about half a million visitors per year). Martz-authored Chime-based tutorials are downloaded about every 8 minutes (~70,000 downloads per year).

Protein Explorer is visited every couple of minutes, and an on-line session is started (in a compatible browser) every four minutes, viewing a molecule in FirstView. A bit less than half of these sessions progress to QuickViews. Protein Explorer is downloaded about every 20 minutes. There are about 140,000 on-line sessions per year, plus an uncounted number of off-line sessions using downloaded copies.

The most popular Martz-authored tutorial on a single molecule, the one on DNA Structure, is visited every 5 minutes, or 120,000 times/year (not counting visits to its translations to Spanish, German and Portuguese).

A more detailed analysis begins below this table of selected examples.

Selected Examples of Rates and Conversions

Example of this rate in academic Year 02-03	Minutes between Events	Events/Day	Events/Week	Events/Month	Events/Year
Visitors to Martz-authored Resources	1	1,440	10 thousand	44 thousand	520 thousand
Visits to Protein Explorer	2.5	570	4 thousand	17 thousand	208 thousand
Visitors to DNA Structure and On-Line Sessions in Protein Explorer	5	286	2 thousand	8.7 thousand	104 thousand
Protein Explorer Sessions On-Line that access QuickViews	10	143	1 thousand	4.3 thousand	52 thousand
Visits to Atlas, PDBLite, and MolVisIndex (Each!) and Protein Explorer Downloads	20	71	500	2 thousand	26 thousand
Downloads of DNA, Hemoglobin, and Antibody Tutorials (Each!)	3.4 hr	7	50	200	2.6 thousand

Grand Totals
including UMass Chime plus RasMol sites,
and Martz-authored resources served from SDSC (proteinexplorer.org, molvisindex.org, DNA Structure, etc.).
Visitors come from over 100 countries.
These are very conservative counts. "People" (unique IP addresses) are counted only once per week or year,
regardless of how many times they visited during the specified time interval.
Data in this table are based on analysis of web server logs and subscriber counts.

Academic Year
(sample coverage) People/week People/year Files served/year Subscribers to
EMail List

Cumulative Total n. a. ~1.9 million
all years* ~83 million
all years n. a.

2002-2003 (67-76%) 8,000-14,000
Av. 11,600 475,000 31,000,000 ~600

2001-2002 (77-88%) 8,000-13,000
Av. 10,700 ~400,000 ~20,000,000 ~600

2000-2001 (68%) 7,000-11,000
Av. 9,400 330,000 13,400,000 ~600

1999-2000 (73%) 6,000-8,000
Av. 7,500 260,000 8,000,000 530

1998-1999 (96%) 4,000-6,000
Av. 5,100 191,000 5,000,000 480

1997-1998 2,500-4,000
Av. 3,700 127,000 3,400,000 380

1996-1997 1,500-3,000 90,000 1,900,000 290

1995-1996 Grew to ~1,500 30,000 600,000 200

* Cumulative total: "People" who visited in more than one year are counted once for each year.
Single academic year values count "people" only once regardless of how often they visited during the year.
"People" means unique Internet Protocol addresses.

Total Downloads from UMass

Academic Year Martz-authored Chime-Based Tutorials and Resources (Downloads) Martz-authored RasMol "Movie" Scripts
(obsolete ca. 1997) RasMol Program authored by Roger Sayle
(% Macintosh)

Cumulative Total 242,000* 37,000 545,000

2002-2003 69,000 3,900 73,000 (7%)

2001-2002 50,000** 4,900 89,000 (11%)

2000-2001 73,900 4,800 76,600 (13%)

1999-2000 27,500 6,300 100,000 (15%)

1998-1999 12,000 6,300 94,000 (15%)

1997-1998 7,000 5,200 67,000 (18%)

1996-1997 2,400 4,500 41,000 (20%)

1995-1996 not yet avail. 1,500 5,000 (36%)

* Chime-based resources can be used on-line, without downloading, whereas RasMol can be used only by downloading.
** The drop in downloads is attributed to the smaller number of new versions released in 2001-2002 (3) compared to 2000-2001 (8).
RasMol was released in 1993. The UMass RasMol Home Page was created November 1995. It was renamed the RasMol Classic Site in July 2008. The UMass server is the sole authorized downloading source for Martz-authored Chime resources (except for some translated to other languages). RasMol can be downloaded from many other sites, notably RasMol.Org.

Visitors to, Downloads and Downloaders
of Martz-authored Molecular Visualization Tutorials and Resources
(All resources in this table are at Chime Resources by Eric Martz.)

Data in this table are based on analysis of web server logs.
A minority of "visitors" used a compatible browser with Chime installed -- only this minority could actually use the resource. Estimates of this percentage are shown only for Protein Explorer; for other resources, estimates range from 10% for Netscape-only resources to 25% for those compatible with both Netscape and Internet Explorer. The World Index does not require Chime and is accessible in all browsers and platforms.

Part I

Academic Year Total
in Year Protein Explorer People using Protein Explorer On-Line; On-Line Sessions* DNA (English only) Hemoglobin (English only) Antibody (English only) World Index of Molecular Visualization Resources

2002-2003 333,000
69,000
13,500 105,000
30,000
11,700
(2 releases) 30,000
140,000 120,000
3,100
1,900 8,200
3,000
1,500 4,900
3,000
1,400 32,000
(not downloadable)

2001-2002 ~300,000
50,000
6,000 ~100,000
8,500
4,400
(3 releases) ~18,000
~60,000 100,000
2,400
1,600 not
det. not
det. not det.

2000-2001 225,000
74,000
10,400 75,000
14,700
7,700
(8 releases)
14,000 40,000 90,000
3,700
2,700 29,000
3,700
2,300 9,000
3,500
2,100 not det.

1999-2000 147,000
27,500
4,300 11,000
3,200
2,200 2,700
5,500 not
det. not
det. not
det. Released June 2000
1998-1999 86,000
12,000
2,300 1,800
780
560 not det. 14,000
1,300
1,000 8,900
1,300
1,000 1,100
1,000
750 "

1997-1998 7,800 not
yet
avail. not
yet
avail. 1,000 1,000 770 "

1996-1997 21,000
2,400
950 " " (~500?)
300 not
yet
avail. not
yet
avail. "

1995-1996 The first Martz-authored Chime Resources (Protein Secondary Structure and DNA) were released November 1996. Chime 1.0 was released 12/31/96.

* "Using" Protein Explorer by starting a Session (as distinct from "visiting" Protein Explorer) requires a compatible browser with the Chime plug-in installed. Much use of Protein Explorer is also off-line with downloaded copies, but only on-line use can be quantitated.
** "Releases" means the number of new versions made available during the year. Releases within two weeks of each other are counted as one release. Releases made in late August are counted for the following academic year, since that is when the downloads occur. A detailed list of releases is available.

Visitors to, Downloads and Downloaders
Part II

Academic Year Protein Morpher Non-Covalent
Bond Finder Bilayer and
Gramicidin in English
( in Spanish) Presentation-
Authoring Template

2002-2003 not
det. not
det. not
det. not
det.

2001-2002 not
det. not
det. not
det. not
det.

2000-2001 6,000
5,300
3,200 4,200
3,000 280 (178)
185 (90) 7,100
3,500
2,300

1999-2000 not
det. not
det. Released January 2001 not
det.

1998-1999 2,000
180
140 4,700
190
160 " 5,800
1,000
800

1997-1998 not
yet
avail. not
yet
avail. " 900

1996-1997 not
yet
avail. not
yet
avail. " "

1995-1996 The first Martz-authored Chime Resources (Protein Secondary Structure and DNA) were released November 1996. Chime 1.0 was released 12/31/96.

Average Visits per Week to Resources Authored by the Martz Group

"Visits" as reported by www.sitemeter.com. (See sitemeters at the bottoms of the main pages of these resources). A single "visit" may include multiple hits from the same IP address within a short period of time. For Protein Explorer in 2002-2003, there were 2.5 hits per sitemeter-defined "visit".

Season	Protein Explorer (PE)				Atlas of Macro- molecules	Chime Resources by Martz	RasMol Home Page	Non Covalent Bond Finder	DNA Structure	Lipid Bilayers	History of Molecular Visualization	PDB Lite	World Index of Molecular Visualization Resources
Season	FrontDoor English	FrontDoor Espanol	QuickViews On-Line	QuickViews Downloaded**	Atlas of Macro- molecules	Chime Resources by Martz	RasMol Home Page	Non Covalent Bond Finder	DNA Structure	Lipid Bilayers	History of Molecular Visualization	PDB Lite	World Index of Molecular Visualization Resources
Fall* 2003	4,076	78	1,081	199	683	1,421	1,544	96	2,328	155	164	708	587
Fall* 2002	3,769	90	1,072	143	550	1,296	1,618	127	1,898	139	142	646	580

Sitemeter use was started in June 2002.
*"Fall": September through mid-December. (2003: through mid-November.)
**The computer with a downloaded copy of PE must be on-line, and have fetched the PDB file via Internet in order to be counted here. The vast majority of sessions with downloaded copies of PE are believed to be off-line and not recorded here.

Definitions:

"Academic year": September 1 through August 31. 1999-2000 means 9/99-8/00.
"People", "Visitors": unique internet protocol (IP) addresses in the time period indicated. (Some people use multiple IP addresses, e.g. home vs. work computers, but some IP addresses are shared by multiple people.)
"Files served": total requests for files (types html, gif, js, etc.), that is, lines in the weblog.
"Downloaders": unique IP addresses fetching installers.
"Downloads": Number of installer file (.exe) fetches. The ratio of installer file fetches to downloaders varies from 1.3 to 1.9. An unknown percentage of downloaders may have failed to complete the download, or may not have succeeded in installing the resource.
"Sample coverage": see below.

Sample coverage: Weblogs are kept for only a portion of the reported time intervals. The percentage of time for which weblogs were kept, and upon which statistics were based, is indicated as the sample percentage. Values are increased by the factor (1/(sample fraction)). For example, in AY 2000-2001, the sample included 68% of the year, so values in the sample were multiplied by 1.46.

The range given for people/week reflects the range observed (excluding extremes that occurred less than twice/year). Maximum use of the websites occurs during academic semesters (Sep-Dec and Feb-May), while minmum use occurs in Jan and summer (Jun, Jul, Aug). Low values given above do not include the weeks of Christmas and New Year's Day, which have about half of the low values given above.

Raw weblogs are available on request for verification.

Academic Year (sample coverage)	People/week	People/year	Files served/year	Subscribers to EMail List
Cumulative Total	n. a.	~1.9 million all years*	~83 million all years	n. a.

2002-2003 (67-76%)	8,000-14,000 Av. 11,600	475,000	31,000,000	~600
2001-2002 (77-88%)	8,000-13,000 Av. 10,700	~400,000	~20,000,000	~600
2000-2001 (68%)	7,000-11,000 Av. 9,400	330,000	13,400,000	~600
1999-2000 (73%)	6,000-8,000 Av. 7,500	260,000	8,000,000	530
1998-1999 (96%)	4,000-6,000 Av. 5,100	191,000	5,000,000	480
1997-1998	2,500-4,000 Av. 3,700	127,000	3,400,000	380
1996-1997	1,500-3,000	90,000	1,900,000	290
1995-1996	Grew to ~1,500	30,000	600,000	200

Academic Year	Martz-authored Chime-Based Tutorials and Resources (Downloads)	Martz-authored RasMol "Movie" Scripts (obsolete ca. 1997)	RasMol Program authored by Roger Sayle (% Macintosh)
Cumulative Total	242,000*	37,000	545,000

2002-2003	69,000	3,900	73,000 (7%)
2001-2002	50,000**	4,900	89,000 (11%)
2000-2001	73,900	4,800	76,600 (13%)
1999-2000	27,500	6,300	100,000 (15%)
1998-1999	12,000	6,300	94,000 (15%)
1997-1998	7,000	5,200	67,000 (18%)
1996-1997	2,400	4,500	41,000 (20%)
1995-1996	not yet avail.	1,500	5,000 (36%)

Academic Year	Total in Year	Protein Explorer	People using Protein Explorer On-Line; On-Line Sessions*	DNA (English only)	Hemoglobin (English only)	Antibody (English only)	World Index of Molecular Visualization Resources
2002-2003	333,000 69,000 13,500	105,000 30,000 11,700 (2 releases)	30,000 140,000	120,000 3,100 1,900	8,200 3,000 1,500	4,900 3,000 1,400	32,000 (not downloadable)
2001-2002	~300,000 50,000 6,000	~100,000 8,500 4,400 (3 releases)	~18,000 ~60,000	100,000 2,400 1,600	not det.	not det.	not det.
2000-2001	225,000 74,000 10,400	75,000 14,700 7,700 (8 releases)	14,000 40,000	90,000 3,700 2,700	29,000 3,700 2,300	9,000 3,500 2,100	not det.
1999-2000	147,000 27,500 4,300	11,000 3,200 2,200	2,700 5,500	not det.	not det.	not det.	Released June 2000
1998-1999	86,000 12,000 2,300	1,800 780 560	not det.	14,000 1,300 1,000	8,900 1,300 1,000	1,100 1,000 750	"
1997-1998	7,800	not yet avail.	not yet avail.	1,000	1,000	770	"
1996-1997	21,000 2,400 950	"	"	(~500?) 300	not yet avail.	not yet avail.	"
1995-1996	The first Martz-authored Chime Resources (Protein Secondary Structure and DNA) were released November 1996. Chime 1.0 was released 12/31/96.

Academic Year	Protein Morpher	Non-Covalent Bond Finder	Bilayer and Gramicidin in English ( in Spanish)	Presentation- Authoring Template
2002-2003	not det.	not det.	not det.	not det.
2001-2002	not det.	not det.	not det.	not det.
2000-2001	6,000 5,300 3,200	4,200 3,000	280 (178) 185 (90)	7,100 3,500 2,300
1999-2000	not det.	not det.	Released January 2001	not det.
1998-1999	2,000 180 140	4,700 190 160	"	5,800 1,000 800
1997-1998	not yet avail.	not yet avail.	"	900
1996-1997	not yet avail.	not yet avail.	"	"
1995-1996	The first Martz-authored Chime Resources (Protein Secondary Structure and DNA) were released November 1996. Chime 1.0 was released 12/31/96.