Abstract: A digital camera is used to scan documents and generate a corresponding digital output signal. A data processor receives the digital output signal and generates corresponding index information. The video and index information are then stored on one or more optical disks for search and retrieval.

Abstract: A method of producing an algal turf for use as a scrubber of carbon dioxide, nutrients and pollutants as well as biomass production is disclosed. A growing surface for spores or benthic microalgae is provided on a water surface. The growing surface is subjected to periodic water surge action to promote metabolite cellular-ambient water exchange and light is provided, natural or artificial to promote growth. The growing turf is harvested before being overgrown by larger macroalgae.

Abstract: There is disclosed a system by which a satellite is connected by means of a long tether, typically a wire 100 km or more in length, to a powered spacecraft. The spacecraft may be the Space Shuttle, and two basic equilibrium positions of the system are discussed. The wire is gradually released from a storage drum aboard the powered spacecraft, and the gravity gradient established along with atmospheric drag provide the force for deployment. The system can be used repeatedly by reeling back onto the drum. The wire, once deployed, can then be left in orbit for use in future shuttle missions and (once reeled back) can be returned to earth for repair or replacement. The tethered system finds utilization in the broad areas of upper atmosphere measurements, gravity gradient measurements and radio physics research.