Estimates of %NCW bathing deep North Atlantic (IODP Site 306-U1313) over the past ~3.3 Ma

The circulation and internal structure of the oceans exert a strong influence on Earth's climate because they control latitudinal heat transport and the segregation of carbon between the atmosphere and the abyss (Sigman et al., 2010, doi:10.1038/nature09149). Circulation change, particularly in the Atlantic Ocean, is widely suggested (Bartoli et al., 2005, doi:10.1016/j.epsl.2005.06.020; Haug and Tiedemann, 1998, doi:10.1038/31447; Woodard et al., 2014, doi:10.1126/science.1255586; McKay et al., 2012, doi:10.1073/pnas.1112248109) to have been instrumental in the intensification of Northern Hemisphere glaciation when large ice sheets first developed on North America and Eurasia during the late Pliocene, approximately 2.7 million years ago (Bailey et al., 2013, doi:10.1016/j.quascirev.2013.06.004). Yet the mechanistic link and cause/effect relationship between ocean circulation and glaciation are debated. Here we present new records of North Atlantic Ocean structure using the carbon and neodymium isotopic composition of marine sediments recording deep water for both the Last Glacial to Holocene (35-5 thousand years ago) and the late Pliocene to earliest Pleistocene (3.3-2.4 million years ago). Our data show no secular change. Instead we document major southern-sourced water incursions into the deep North Atlantic during prominent glacials from 2.7 million years ago. Our results suggest that Atlantic circulation acts as a positive feedback rather than as an underlying cause of late Pliocene Northern Hemisphere glaciation. We propose that, once surface Southern Ocean stratification (Sigman, et al., 2004, doi:10.1038/nature02357) and/or extensive sea-ice cover (McKay et al., 2012, doi:10.1073/pnas.1112248109) was established, cold-stage expansions of southern-sourced water such as those documented here enhanced carbon dioxide storage in the deep ocean, helping to increase the amplitude of glacial cycles.

Basics of pump-and-treat ground-water remediation technology /

Mode of access: Internet.

Water quality in the middle Great Lakes : results of the 1985 USEPA survey of Lakes Erie, Huron, and Michigan /

Mode of access: Internet.

Assessing UST corrective action technologies : early screening of clean-up technologies for the saturated zone /

Mode of access: Internet.

Variations in skid resistance over time. Part 1. Final report.

Virginia Department of Highways and Transportation, Richmond

General censuses and vital statistics in the Americas: an annotated bibliography of the historical censuses and current vital statistics of the 2l American republics, the American sections of the British Commonwealth of Nations, the American colonies of Denmark, France, and the Netherlands, and the American territories and possessions of the United States.

At head of title: United States Dept. of Commerce, Jesse H. Jones, secretary. Bureau of the Census, J.C. Capt, director... United States Library of Congress, Archibald MacLeish, librarian. Reference Dept., David C. Mearns, director.

Zoning problems; supplementary statistical report for the Illinois Zoning Laws Study Commission,

Includes bibliographical references.

Sociopathic knowledge bases : correct knowledge can be harmful even given unlimited computation /

"College of Engineering, UILU-ENG-89-1757."

An analysis of the distinction between deep and shallow expert systems /

This paper analyzes the relationship between the techniques used to build expert systems and the behaviors they exhibit to show that there is not sufficient evidence to link the behavioral shortcomings of first-generation expert systems to the shallow methods of representation and inference they employ. There is only evidence that the shortcomings are a consequence of a general lack of knowledge. Moreover, the paper shows that the first-generation of expert systems employ both shallow methods and most of the so-called deep methods. Lastly, we show that deeper methods augment but do not replace shallow reasoning methods; most expert systems should possess both."

Knowledge base refinement as improving an incorrect, inconsistent and incomplete domain theory

UIUCDCS-R-89-1585

Engineering feasibility of internal friction damping as a nondestructive evaluation technique for synthetic ropes : final report /

Includes bibliographical references.