Abstract: A method can include establishing, by a computing system, a secure electronic network connection to an electronic agent running configured to access the dataset to dynamically generate the metadata related to the dataset on a client computing system. A method can include receiving, by the computing system, from the electronic agent via the secure electronic network connection, metadata related to a dataset, the metadata comprising a plurality of attributes of the dataset and a summary of the dataset. A method can include applying a valuation model to the metadata to determine an estimated value of the dataset, the valuation model comprising a machine learning model trained using marketplace data comprising sales prices and attributes of one or more datasets, wherein the model is trained to output the sales prices of the one or more datasets. A method can include determining, an estimated value of the dataset.

Abstract: A microscope eyeshield of flexible material has internal ribs of different diameters. Small diameter ribs frictionally engage small diameter eyepieces while the larger diameter ribs are for larger diameter eyepieces. A groove adjacent each small diameter rib permits the respective small diameter rib to be displaced into the groove when the eyeshield is fitted to a larger diameter eyepiece.