Abstract: In general, in one aspect, the disclosure describes a method of processing content for distribution over a computer network. The method includes receiving submitted electronic content, accessing identification of at least one of a set of more than one electronic book digital rights management (DRM) systems, and automatically generating an electronic book from the received electronic content for distribution in accordance with the identified electronic book digital rights management system(s).

Abstract: A detector assembly which is particularly well suited for detecting gamma rays in a formation density logging tool employs a sodium iodide crystal and glass phototube; and is housed in a novel mounting arrangement which provides appropriate gamma ray shielding as well as protection from shock and vibration. The actual crystal is mounted in a hermetically sealing housing. The outer configuration of the housing allows for rigid attachment to a magnetic shield. This shield provides magnetic protection for the phototube so as to avoid undesired disturbances in the tube output signal during operation. A layer of elastomeric material provided with voids for volumetric expansion is interposed between the crystal housing and the magnetic shield. An outer insulating tube is then ruggedly secured to one end of the mumetal shield by an adhesive.