Recreating Abraham's Star Charts

Scanner Parameter Estimation Using Bilevel Scans of Star Charts

Scanning a high contrast image in bilevel mode results in image degradation. This is caused by two primary effects: blurring and thresholding. This paper expands on a method of estimating a joint distortion parameter, called the edge spread, from a star sector test chart in order to calculate the values of the point spread function width and binarization threshold. This theory is also described...

Recreating ancestral proteins.

Tracing the history of molecular changes using phylogenetic methods can provide powerful insights into how and why molecules work the way they do. It is now possible to recreate inferred ancestral proteins in the laboratory and study the function of these molecules. This provides a unique opportunity to study the paths and the mechanisms of functional change during molecular evolution. What ins...

Recreating Secure Spaces

Retrieving and Recreating Musical Form

This paper discusses musical form from a cognitive and a computational viewpoint. While several time-windows exist in the brain, we here put emphasis on the superchunks of up to more than 30 seconds lengths. We compare a strategy for auditive analysis based on human cognition with a strategy for automatic analysis based on feature extraction. The feature extraction is based on the musical featu...

Recreating the Posterior Chamber Lens

T he history of IOLs began in 1949 with Sir Harold Ridley’s insertion of an artificial lens into the posterior chamber. Although placing an IOL within the space from which the cataract had been removed seemed (and seems still) a natural, almost obvious choice, ophthalmologists abandoned posterior chamber lens implantation within a few years. I reawakened surgeons’ interest in posterior chamber ...