Description and chemical composition of manganese nodules in a core located in the Nares Abyssal Plain, Atlantic Ocean

Three nodules from a core taken north of Puerto Rico are composed chiefly of an x-ray amorphous, hydrated, iron-manganese oxide, with secondary goethite, and minor detrital silicates incorporated during growth of the nodules. No primary manganese mineral is apparent. The nodules are enriched in iron and depleted in manganese relative to Atlantic Ocean averages. The formation of these nodules appears to have been contemporary with sedimentation and related to volcanic activity.

Advanced recorder design and development. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Examination of lane change crashes and potential IVHS countermeasures. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Examination of reduced visibility crashes and potential IVHS countermeasures. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Examination of intersection, left turn across path crashes and potential IVHS countermeasures. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Speed and accidents. Phase 1. Interim report.

National Highway Safety Bureau, Washington, D.C.

An analysis of guardrail and median barrier accidents using the Longitudinal Barrier Special Studies (LBSS) file. Volume I: final report.

Federal Highway Administration, Office of Safety and Traffic Operations Research and Development, McLean, Va.

An analysis of guardrail and median barrier accidents using the Longitudinal Barrier Special Studies (LBSS) file. Volume II: users guide.

Federal Highway Administration, Office of Safety and Traffic Operations Research and Development, McLean, Va.

Automotive tape recorder. Volume 1. Design and preliminary development. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Analytical modeling of driver response in crash avoidance maneuvering. Volume III: a trim model and computer program for determining ground vehicle steady state operating conditions and quasilinear stability coefficients. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Backing crashes: problem size assessment and statistical description.

Mode of access: Internet.

Lane change/merge crashes: problem size assessment and statistical description.

Mode of access: Internet.