969 resultados para c-index
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The organic matter contents of sediments and rocks sampled during DSDP Leg 93 have been characterized by CHN and Rock-Eval analyses. Most samples from Sites 604 and 605 on the New Jersey continental slope and from Site 603 on the Hatteras outer continental rise contained less than 0.5% organic carbon. Some Neogene samples from the slope contained 1 to 2% organic carbon, and Cretaceous samples from the outer rise were as rich as 13.6% organic carbon by weight. Thin layers of black claystones of Santonian, Cenomanian, and Albian age were found interbedded in organiccarbon- lean, bioturbated, turbiditic claystones. Similar layers of turbiditic black marlstones were interspersed among Neocomian limestones and sandstones. Although the organic matter in many of the samples appeared to be detrital continental material, according to Rock-Eval and C/N values, Cenomanian black shales, in particular, contained substantial proportions of marine-derived organic matter.
The North Sea autumn spawning Herring (Clupea harengus L.) Spawning Component Abundance Index (SCAI)
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The North Sea autumn-spawning herring (Clupea harengus) stock consists of a set of different spawning components. The dynamics of the entire stock have been well characterized, but although time-series of larval abundance indices are available for the individual components, study of the dynamics at the component level has historically been hampered by missing observations and high sampling noise. A simple state-space statistical model is developed that is robust to these problems, gives a good fit to the data, and proves capable of both handling and predicting missing observations well. Furthermore, the sum of the fitted abundance indices across all components proves an excellent proxy for the biomass of the total stock, even though the model utilizes information at the individual-component level. The Orkney-Shetland component appears to have recovered faster from historic depletion events than the other components, whereas the Downs component has been the slowest. These differences give rise to changes in stock composition, which are shown to vary widely within a relatively short time. The modelling framework provides a valuable tool for studying and monitoring the dynamics of the individual components of the North Sea herring stock.
Index of the relative importance of fuel efficiency (IFE) in the motor vehicle market. Final report.
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National Highway Traffic Safety Administration, Office of Research and Development, Washington, D.C.
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Mode of access: Internet.
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Includes index.
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Mode of access: Internet.
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Includes index.
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Mode of access: Internet.
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Mode of access: Internet.
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Texas State Department of Highways and Public Transportation, Austin
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Shipping list no.: 91-798-P.
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Supplemented by: "Summary of an index to Waagen, by Algernon Graves" ([9], 366 p., plate. port. 25 cm.) published: London, Cornmarket, 1970. Facsim. of 1912 ed.
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[Vol.5] printed by Darling & Son.
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Includes index.