The OSL Laboratory was set up in 2003 as the Luminescence Dating Laboratory in the Department of Geography.
The OSL laboratory is now a key research facility of the Department of Geography and Planning in the School of Environmental Sciences.
If a site has Certified Metrics instead of estimated, that means its owner has installed code allowing us to directly measure their traffic.
The laboratory is located at the 7th floor of the Roxby building.
It was purpose-built and comprises 3 rooms for sample preparation and measurement.
Not all websites implement our on-site analytics and publish the results.For these sites, we show estimated metrics based on traffic patterns across the web as a whole.Certified Site Metrics are metrics that are directly-measured from the website instead of estimated.The website owner has installed an Alexa Certify Code on the pages of their site and chosen to show the metrics publicly.
We identify these patterns by looking at the activity of millions of web users throughout the world, and using data normalization to correct for any biases.The more traffic a site gets, the more data we have to calculate estimated metrics.