George the Magnificent Prepare to Be Amazed!. Number Crunching: Or How I Learned I Wanted to...
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Transcript of George the Magnificent Prepare to Be Amazed!. Number Crunching: Or How I Learned I Wanted to...
George the Magnificent
Prepare to Be Amazed!
Number Crunching: Or How I Learned I Wanted to Participate in Preservation Statistics
George Blood
Digital Conversion Interest GroupAmerican Library Association, Preservation and Reformatting SectionSan Francisco 2015
- regression to the mean
- Gaussian distribution
- standard deviation
- agglomerative nesting
- statistically significant
- Shewhart charts
- etc.
Statistical Concepts
Why collect data? Why do data analysis? •base lining•quantify change•resource allocation•advocacy
Why collect data? Why do data analysis? •You might consider that the collection of this data could be the highest value-added resource allocation, or process change you can make!
Improving the art of preservation
Risk Factors Impact!Mold < 1% 50% With Record Tabs Intact
Average Durations
Audiocassette:
Reel:
MiniDisc:
Analog Disc:
Microcassette:
DAT:
53 Minutes
50 Minutes
60 Minutes
6 Minutes
30 Minutes
69 Minutes
Stylus Size
Speed: % from 78.26 rpm
Speed / % (count)
Pitch / % (count)
Do actions match words?
We know some audio media are highly endangered due to inherent vice deterioration vectors. Are they being prioritized for digitization?
Lacquer Discs
DAT
MiniDiscs
Columbia 35,766 Total Objects Other 0.21%
Indiana 364,867 Total Objects
Distribution of Objects
Distribution of Objects
Media at Risk Actual process rate: 4% lacquer discs~1% DAT~1% MiniDisc
- reference requests
- number of people in the reading room per hour
- telephone inquiries
- disasters responded to
- track digitization against web activity and traffic in
special collections
Library Examples
How complicated does it have to be?
How complicated does it have to be?
- Use a text program to print out sheets of paper
with basic stats.
- Assign someone to collate daily data handed in daily.
- Download the Preservation Statistics from the website
and use THAT form to gather information daily, weekly,
monthly, per project, or as appropriate.
- A GoogleDoc or other shared spreadsheet, anyone?
If you keep up with it, completing
the survey each year will take 10 minutes!
Why collect data? Why do data analysis? •You might consider that the collection of this data could be the highest value-added resource allocation, or process change you can make!
Lies, Damn Lies and Statistics: Or How I Learned I Wanted to Participate in Preservation Statistics
George Blood
Digital Conversion Interest GroupAmerican Library Association, Preservation and Reformatting SectionSan Francisco 2015