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  • Springer  (27)
  • Wiley  (22)
  • Springer Nature  (19)
  • American Geophysical Union  (14)
  • Blackwell Publishing Ltd  (3)
  • Heidelberg: Springer
  • 2005-2009  (43)
  • 2000-2004  (28)
  • 1990-1994  (14)
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Keywords
Publisher
Years
Year
  • 1
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    Motion of dinoflagellates in a simple shear flow (2000)
    Wiley
    Details
    Publication Date: 2000-11-01
    Print ISSN: 0024-3590
    Electronic ISSN: 1939-5590
    Topics: Biology , Geosciences , Physics
    Published by Wiley on behalf of Association for the Sciences of Limnology and Oceanography.
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    PAPER CURRENT
  • 2
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    LISST-100 measurements of phytoplankton size distribution: evaluation of the effects of cell shape (2007)
    Wiley
    Details
    Publication Date: 2007-11-01
    Electronic ISSN: 1541-5856
    Topics: Biology , Geosciences
    Published by Wiley on behalf of Association for the Sciences of Limnology and Oceanography.
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    PAPER CURRENT
  • 3
    Electronic Resource
    Electronic Resource
    INTEGRATED ECHO SOUNDER, GPS, AND GIS FOR RESERVOIR SEDIMENTATION STUDIES: EXAMPLES FROM TWO ARKANSAS LAKES (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 40 (2004), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : Bathymetric and sedimentation surveys were conducted using a dual frequency (28/200 kHz) echo sounder system in two reservoirs (Lee Creek Reservoir and Lake Shepherd Springs) in the Ozark Plateau of northwestern Arkansas. Echo sounder survey data were merged within geographic information system (GIS) software to provide detailed visualization and analyses of current depths, pre-impoundment topography, distribution, thickness, and volume estimates of lacustrine sediment, time averaged sediment accumulation rates, long term average annual sediment flux, and water storage capacity. Calculated long term average sediment accumulation rates were used to model sediment infilling and projected lifetimes of each reservoir. Results from echo sounder surveys and GIS analyses suggest that the Lee Creek Reservoir has a projected lifetime of approximately 500 years compared to a projected lifetime for Lake Shepherd Springs of approximately 3,000 years. Estimated differences in projected lifetimes of these reservoirs reflected differences in initial reservoir volume and long term average annual sediment flux from the respective watersheds related to watershed area, physiography, land cover, and land use. The universal soil loss equation (USLE) model generated sediment fluxes an order of magnitude larger from the watersheds of both reservoirs compared to the geophysical data estimates. This study demonstrated the utility of merging geophysical survey (echo sounder) data within a GIS as an aid to understanding patterns of reservoir sedimentation. These data and analyses also provide a baseline relevant to understanding sedimentation processes and are necessary for development of long term management plans for these reservoirs and their watersheds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.2004.tb01061.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Formation and Fragmentation of Protostellar and Protoplanetary Disks (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 675 (1992), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1992.tb56813.x
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Plasma membrane lipid metabolism of petunia petals during senescence (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 90 (1994), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The specific activities of 6 enzymes, which are involved in the synthesis and catabolism of membrane lipids, were monitored in plasma membranes isolated from petunia petals during senescence. These included phosphatidylinositol (PI) kinase (EC 2.7.1.67), phosphatidylinositol monophosphate (PIP) kinase (EC 2.7.1.68). diacylglycerol (DAG) kinase (EC 2.7.1.107), phospholipase A (EC 3.1.1.4) and PIP- and PIP2-phospholipase C˙(EC 3.1.4.3). Using endogenous substrate, the [32P]PA and [32P]PIP2 formation increased to 140 and 200%, respectively, of the day 1 value by 4 days after harvest. There was no significant change in [32P]PIP formation during the same time period. On the fifth day the petals wilted and the [32P]PA and [32P]PIP formation declined significantly. In contrast, the [32P]PIP2 formation remained high in the day 5 petals. When the lipid kinase activities were assayed in the membranes in the presence of exogenous substrate the specific activity of all of the enzymes increased. and the changes in [32P]PA production over the 5-day period were similar to those observed with endogenous substrate. When exogenous PI and PIP were added, however, there was no longer an increase in [32P]PIP2 formation by plasma membranes of day 4 petals and [32P]PIP formation significantly decreased. The relative decrease in PIP and PIP2 formation by day 4 membranes when exogenous substrate was added may have resulted from differences in the lipase activities in the day 1 and day 4 membranes. The plasma membrane A-type phospholipase activity increased throughout the 5 day period, and phospholipase C activity increased two-fold between day 1 and day 4. Such changes in the metabolism of the plasma membrane lipids during flower senescence would affect the ability of the petals to use inositol phospholipid-based signal transduction pathways.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1994.tb00388.x
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  • 6
    Electronic Resource
    Electronic Resource
    Courseware reviews (1993)
    Springer
    Computers and the humanities 27 (1993), S. 55-71 
    Details
    ISSN: 1572-8412
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Media Resources and Communication Sciences, Journalism
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01830719
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Frame-based representation of philosophical systems using a knowledge engineering tool (1993)
    Springer
    Computers and the humanities 27 (1993), S. 261-275 
    Details
    ISSN: 1572-8412
    Keywords: conceptual analysis ; knowledge representation ; knowledge engineering ; semantic networks ; text analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Media Resources and Communication Sciences, Journalism
    Notes: Abstract This article addresses the methodological problem of the non-linear representation of philosophical systems in a computerized knowledge base. It is a problem of knowledge representation as defined in the field of artificial intelligence. Instead of a purely theoretical discussion of the issue, we present selected results of a practical experiment which has in itself some theoretical significance. We show how one can represent different philosophies using CODE, a knowledge engineering system developed by artificial intelligence researchers. The hypothesis is that such a computer based representation of philosophical systems can give insight into their conceptual structure. We argue that computer aided text analysis can apply knowledge representation tools and techniques developed in artificial intelligence and we estimate how philosophers as well as knowledge engineers could gain from this cross-fertilization. This paper should be considered as an experiment report on the use of knowledge representation techniques in computer aided text analysis. It is part of a much broader project on the representation of conceptual structures in an expert system. However, we intentionally avoided technical issues related to either Computer Science or History of Philosophy to focus on the benefit to enhance traditional humanistic studies with tools and methods developed in AI on the one hand and the need to develop more appropriate tools on the other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01830368
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  • 8
    Electronic Resource
    Electronic Resource
    Triggering Protostellar Collapse, Injection, and Disk Formation (2000)
    Springer
    Space science reviews 92 (2000), S. 13-22 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Certain meteoritical inclusions contain evidence for the existence of short-lived radioactivities such as 26Al and 41Ca at the time of their formation 4.566 billion years ago. Because the half-lives of these nuclides are so short, this evidence requires that no more than about a million years elapsed between their nucleosynthesis and their inclusion in cm-sized solids in the solar nebula. This abbreviated time span can be explained if these nuclides were synthesized in a stellar source such as a supernova, and were then transported across the interstellar medium by the resulting shock wave, which then triggered the gravitational collapse of the presolar molecular cloud core. Detailed 2D and 3D numerical hydrodynamical models are reviewed and show that such a scenario is consistent with the time scale constraint, and with the need to both trigger collapse and to inject shock-wave matter into the collapsing protostellar cloud and onto the protoplanetary disk formed by the collapse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005237031828
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  • 9
    Electronic Resource
    Electronic Resource
    Adventures in Data Analysis: The TAO Array and the 1997–1998 El Niño (2000)
    Springer
    Mathematical geology 32 (2000), S. 159-185 
    Details
    ISSN: 1573-8868
    Keywords: El Niño—Southern Oscillation ; real time ; data analysis ; time series ; animation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract Traditional undergraduate education in earth sciences does not emphasize data acquisition, analysis, or assessment. However, arrival of the information age dictates that earth sciences graduates be imbued with fundamental skills to organize, evaluate and process large data sets. Fortunately, the proliferation of remotely sensed data and its availability via the Internet provides many opportunities for earth science educators to meet these needs. Exercises to introduce students to data analysis have been designed utilizing data from the Tropical Atmosphere–Ocean (TAO) Array and the 1997–1998 El Niño episode in the tropical Pacific Ocean. The TAO Array is a grid of 69 buoys moored across the equatorial Pacific Ocean (8°N to 8°S and 95°W to 143°E) recording environmental data relevant to El Niño—Southern Oscillation (ENSO) processes. Data from the TAO Array is available in near-real-time (http://www.pmel.noaa.gov/toga-tao/realtime.html) or as archived ASCII files (http://www.pmel.noaa.gov/toga-tao/data-delivery.html) providing daily (sometimes hourly) records of environmental parameters for each buoy in the grid. Student exercises in data analysis begin with downloading data from buoy locations, parsing the data into spreadsheets, and organizing data by environmental parameter into yearly and monthly data sets. Analyses of reconstructed data include calculations of long-term averages of environmental parameters, seasonal climatologies, monthly climatologies and calculation of long-term, seasonal, and monthly anomalies. Finally, monthly anomaly maps produced by students are loaded sequentially into GIF-animation software to create time-series images illustrating the progress and development of the 1997–1998 El Niño event.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007523322222
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  • 10
    Electronic Resource
    Electronic Resource
    A method of calculating massive Feynman integrals (1991)
    Springer
    Theoretical and mathematical physics 89 (1991), S. 1052-1064 
    Details
    ISSN: 1573-9333
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01016805
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