Abstract: Methods, apparatuses, and computer program products are described herein that are configured to provide a user device with functionality enabling news feed filtering. One example embodiment may include a method for receiving post information having associated filterable subject matter attributes, providing selectable subject matter filter values, each of the one or more selectable subject matter filter values configured to enable the first user to identify a subject matter by which to filter the non-filtered scene information, receiving a subject matter filter value, providing, to the user device, via the communication interface, filtered scene information, the filtered scene information comprised of one or more instances of filtered post information, each instance of the filtered post information having one or more associated filterable attributes matching the subject matter filter value.

Abstract: Provided are substrates, e.g. semiconductor wafers, whereby the front side of the substrate and the back side of the substrate differ in surface roughness. Also provided are lithography processes using the substrates.