Search

Your search keyword '"Patterson, W.P."' showing total 65 results
Start Over Author "Patterson, W.P."
65 results on '"Patterson, W.P."'

8. Life history reconstruction of modern and fossil sockeye salmon (Oncorhynchus nerka) by oxygen isotopic analysis of otoliths, vertebrae, and teeth : implication for paleoenvironmental reconstructions

Author

Zazzo, A., Smith, G.R., Patterson, W.P., and Dufour, Elise

Subjects
stomatognathic diseases, paleoenvironment, stomatognathic system, otolith, vertebrae, oxygen isotope ratio, tooth apatite, migration, sockeye salmon
Abstract

We evaluate the use of oxygen isotope values of biogenic apatite for tracking freshwater to marine migration in modem and fossil Pacific sockeye salmon. Oxygen isotope analyses of otoliths, vertebrae, and teeth of three anadromous modem sockeye salmon from Alaska establish a basis for the interpretation of fossil vertebrae and tooth apatite from Pleistocene sockeye salmon of the Skokomish River Valley, Washington. High resolution delta O-18 profiles in salmon otoliths provide, at a monthly resolution, a detailed record of individual history including continental rearing, migration to sea, seasonal variation in sea surface temperatures during marine life, and spawning migration before capture. Pacific salmon teeth are constantly renewed with the last set of teeth forming under the influence of freshwater. Therefore, they do not allow inference concerning sea-run versus landlocked life history in fossil salmon. Salmon vertebrae are also ambiguous indicators of life history regarding fresh versus marine water because centra are minimally ossified in the freshwater stages of life and the outermost layer of vertebral bone might be resorbed to provide nutrients during the non-feeding phase of the spawning migration. Therefore, delta O-18 values of accretionary growth rings in sea-run salmon vertebrae are dominated by the marine signal only if they are not diagenetically altered in freshwater deposits. In Pleistocene sockeye reported here, neither the teeth nor vertebral apatite present clear marine delta O-18 values due to the combined effects of tooth replacement and diagenetic alteration of bone and dentine. delta O-18(PO4) values of fossil vertebrae are intermediate between delta O-18(PO4) values of enamel and basal tooth dentin. Assuming a similar rate of isotope exchange of vertebrae and dentine with freshwater during diagenesis, these results are interpreted to reflect formation of the teeth under the influence of freshwater, and formation of the vertebrae under the influence of oceanic water. Our approach demonstrates that when appropriate knowledge of tissue formation is available, isotopic differences between altered and unaltered tissue holds promise of distinguishing between marine and freshwater origin of the tissues. (c) 2006 Elsevier B.V. All rights reserved.

Published
2006

12. Post-Younger Dryas climate interval linked to circumpolar vortex variability: isotopic evidence from Fayetteville Green Lake, New York.

Author

Kirby, M.E., Patterson, W.P., Mullins, H.T., and Burnett, A.W.

Subjects
CLIMATE change, STORMS, WINTER
Abstract

The late-Glacial/Holocene transition in the North Atlantic-European sectors has long been known to be a period of rapid climate change. There is, however, a continued need for acquiring and developing paleoclimate archives spanning this interval from continental settings. Here we report on a lacustrine (Fayetteville Green Lake) isotope record sampled at a 10-year resolution from the NE USA over the late-Glacial/Holocene interval (14,600–8000 cal year BP). Based on prior isotopic and hydrologic research from Green Lake, the δ18O(calcite) values predominantly reflect winter moisture source and thus winter atmospheric patterns. Furthermore, we use historic (AD 1948–1980) winter circulation data and δ18O(calcite) values from varved sediments to examine the relationship between the circumpolar vortex latitude and isotopes which results in a strong (r = –0.79; r2 = 0.63) negative relationship. Using the linear regression from the isotope-vortex relationship, we model the winter vortex latitude for the late-Glacial/Holocene transition over the NE USA. In addition, we identify an interval from 11,600 to 10,300 cal year BP (the post-Younger Dryas climate interval) wherein the mean winter vortex over the NE USA was expanded by ∼6° latitude (∼36.1°N; i.e., ∼630 km) from its mean historic position between AD 1948–1998 (∼41.8°N). Renewal of more vigorous thermohaline circulation following the Younger Dryas cold event may have forced the post-Younger Dryas climate interval. Increased poleward heat transport due to an active oceanic conveyor would have strengthened the thermal contrast between the NE USA and the North Atlantic thereby enhancing atmospheric pressure gradients and firmly establishing the semi-permanent winter trough over the NE USA. Consequently, storms tracked more frequently up the east coast of the United States from the Gulf of Mexico and Atlantic regions delivering precipitation with relatively high δ18O values to the NE USA. Alternatively, the relative dominance of seasonal precipitation may have changed resulting in less total winter precipitation (low δ18O) causing lake waters to become relatively enriched in high δ18O summer precipitation. Both hypotheses are good candidates for testing by global circulation modeling (GCM). The termination of the post-YD interval at 10,300 cal year BP and the beginning of the Holocene was likely forced by a gradual decrease in thermohaline circulation and poleward heat transport as freshwater input from melting of high-latitude ice sheets increased. [ABSTRACT FROM AUTHOR]

Published
2002
Full Text
View/download PDF

14. Keep it Simple, Stupid

Author

Patterson, W.P.

Subjects
Computers, Software -- Planning, Business, Business, general
Published
1983

15. Paying Those High-Tech Dues

Author

Patterson, W.P.

Subjects
Management -- Planning, Technology -- Management, Business, Business, general
Published
1983

17. Cost Won't Sell Office Automation

Author

Patterson, W.P.

Subjects
Office automation, Cost (Economics) -- Technology application, Business, Business, general
Published
1983

19. Software Sparks a Gold Rush

Author

Patterson, W.P.

Subjects
Computer Industry, Software, Business, Business, general
Published
1983

25. Will the Lion Roar in '84?

Author

Patterson, W.P.

Subjects
Management -- Planning, Corporations -- Management, Business, Business, general
Abstract

John P. Imlay Jr., chairman and Chief Executive Officer (CEO) of Management Science America (MSA) made the move to computers at the right time. The company was close to bankruptcy when Imlay made the successful, gutsy move. Implay's management strategy is examined.

Published
1984

26. Adam's Market Lives On

Author

Patterson, W.P.

Subjects
Computers, Business, Business, general
Abstract

The portable computer market is examined. The features of the new portable computers are presented. Competition among the computer companies - IBM Corp., Xerox Corp., Apple Computer Inc., and Hewlett-Packard Co. should keep the portable computer market booming for quite a while.

Published
1984

27. Let the Experts Do It

Author

Patterson, W.P.

Subjects
Problem Solving, Business, Business, general
Abstract

Computer software programs are being developed which compile data and apply problem solving techniques. Applications will include medical diagnoses and auditing assessments. Implementation costs are dropping as new companies enter the market.

Published
1984

28. Integrated Software Riches Ignite a Market

Author

Patterson, W.P.

Subjects
Software, Products -- Research, Computers, Business, Business, general
Abstract

The integrated computer software market is examined. Companies producing integrated software products are presented. Price comparisons are made of the product being marketed.

Published
1984

29. Natural Language Lets Anyone Use Computers

Author

Patterson, W.P.

Subjects
Computers, Programming languages, Business, Business, general
Abstract

Artificial intelligence in computers is becoming a viable, lucrative market. The growth area of computer artificial intelligence is natural languages. A drawback to computers has been a workable communication language to access data in the computer. A new software product called Intellect by Artificial Intelligence Corp. uses non-technical language to communicate with the computer. Competitors are rushing to introduce other non-technical languages for a market eager to access the computer but unable to speak its language.

Published
1984

30. Climbing Mt. Software

Author

Patterson, W.P.

Subjects
Computers, Microcomputers, Distribution of goods, Business, Business, general
Abstract

Micro software is expanding by leaps as was seen by the amount of displays and products exhibited at the First International Exposition of Software. Dealers are having problems selling the products because they lack the proper understanding of how the product works. Suppliers and dealers are hoping that electronic distribution of software programs will catch on. The benefits of electronic distribution are examined.

Published
1984

31. Corporations in Crisis

Author

Patterson, W.P.

Subjects
Information Services -- Technology application, Office automation, Information management -- Analysis, Business, Business, general
Abstract

Corporations cannot ignore the rapid changes in information technology. Chief executive officers (CEOs) must bring information technology to their company. The World Bank is one organization that has found benefits in information resources management. Management has seen how this form of information technology integrates office automation technology. Management levels within a corporation must all work toward the same goal in order for information technology to work.

Published
1984

35. Biotech Patent Issue Smolders

Author

Patterson, W.P.

Subjects
Patent licenses -- Economic policy, Business, Business, general
Published
1983

40. Still Hitchhiking on the IBM Express

Author

Patterson, W.P.

Subjects
COMPUTER INDUSTRY -- Innovations, Electronics industry -- Innovations, Business, Business, general
Published
1981

42. Desktop Wars

Author

Patterson, W.P.

Subjects
Computers, Business, Business, general
Abstract

The Apple Computer Inc. is fighting the computer war with the introduction of its newest computer, the Macintosh. Apple is in constant competition with IBM and this time Apple's product is warmly received. IBM is still going full steam with its personal computer.

Published
1984

44. IBM Bites Bullet

Author

Patterson, W.P.

Subjects
Office automation, Computers, Marketing -- Planning, Business, Business, general
Abstract

Competition between the two big computer companies is examined. IBM and AT&T are fighting each other because each company has what the other one wants. IBM and AT&T's strategy for market position in the office automation market is examined.

Published
1984

46. Riding the 'Micro' Wave

Author

Patterson, W.P.

Subjects
Computer Industry -- Management, Management -- Planning, Business, Business, general
Published
1983

Catalog

Books, media, physical & digital resources
See catalog results