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  • PANGAEA  (13)
  • Springer  (4)
Document type
Keywords
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Minimal and Maximal Semigroups Related to Causal Symmetric Spaces (2000)
    Springer
    Semigroup forum 61 (2000), S. 57-85 
    Details
    ISSN: 1432-2137
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: G/H be an irreducible globally hyperbolic semisimple symmetric space, and let S⊆G be a subsemigroup containing H not isolated in S. We show that if S o ≠ 0 then there are H-invariant minimal and maximal cones C min⊆C max in the tangent space at the origin such that H exp C min⊆S⊆HZ K (a)expC max. A double coset decomposition of the group G in terms of Cartan subspaces and the group H is proved. We also discuss the case where G/H is of Cayley type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00006015
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Die “Knorpelpalisadentympanoplastik” nach Heermann (1999)
    Springer
    HNO 47 (1999), S. 1074-1088 
    Details
    ISSN: 1433-0458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Nachdem die Prinzipien der Tympanoplastik durch Moritz [46], Wullstein [63] und Zöllner [67] vorgestellt und international anerkannt wurden und Wullstein selbst 1952 Spalthauttransplantate als Trommelfellersatz inaugurierte, wurde die Verwendung von Faszie als Trommelfellersatz 1957 von Unterberger [58], 1960 von H. Heermann [24] und 1963 von Kley [38] vorgeschlagen. Andere autologe mesodermale Gewebearten vie Vene (Shea 1960 [52]) und Periost (Agazzi 1960 [2]) konnten sich ebensowenig durchsetzten wie homologes Trommelfell (Betow 1970 [6]) oder lyophilisierte Dura (Gerhardt und Mahler 1970 [17]). Faszie des musculus temporalis ist somit das international etablierte und am häufigsten verwendete Transplantatmaterial zum Trommelfellersatz in der Mikrochirurgie des Mittelohres.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001060050495
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Completed group algebras without zero divisors (1988)
    Springer
    Archiv der Mathematik 51 (1988), S. 496-499 
    Details
    ISSN: 1420-8938
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01261969
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The Classification of Symplectic Structures of Convex Type (2000)
    Springer
    Geometriae dedicata 79 (2000), S. 299-320 
    Details
    ISSN: 1572-9168
    Keywords: symplectic module ; symplectic module of convex type ; invariant cone ; Lie algebra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper we give a classification of a certain class of semisimple symplectic structures, more precisely all symplectic structures Ω for which a symplectic module (V,Ω) is of convex type. This classification then leads to a classification of Lie algebras with invariant cones and at most one dimensional center.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005260629187
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    Paper (German National Licenses)
    Fulltext
  • 5
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    Nutrients in porewater from Elbe Estuary and adjacent Wadden Sea during Ludwig Prandtl cruise LP0903 in March 2009 (2017)
    PANGAEA
    In:  Helmholtz-Zentrum Geesthacht Centre for Materials and Coastal Research
    Details
    Publication Date: 2023-03-23
    Keywords: Ammonium; Böschrücken; Date/Time of event; DEPTH, sediment/rock; Elevation of event; Event label; Katinger Watt; Klotzenloch; Latitude of event; Location of event; Longitude of event; LP0903; LP0903/BR-1; LP0903/KL-1; LP0903/KW-1; LP0903/ML-1; LP0903/NW-1; LP0903/STS-1; LP0903/TR-1; LP0903/TS-1; LP0903/WW-1; Ludwig Prandtl; Mühlenberger Loch; Neufelder Watt; Nitrate; Nitrite; Phosphate; Sample code/label; Schwarztonnensand; Seawater analysis after Grasshoff et al., 1983 (Verlag Chemie GmbH Weinheim); Tertiussand; Trischen; Wesselburener Watt
    Type: Dataset
    Format: text/tab-separated-values, 1125 data points
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    DATA PANGAEA
  • 6
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    Nutrients in porewater profiles from German Bight and Elbe Estuary (2017)
    PANGAEA
    In:  Supplement to: Neumann, Andreas; van Beusekom, Justus; Holtappels, Moritz; Emeis, Kay-Christian (2017): Nitrate consumption in sediments of the German Bight (North Sea). Journal of Sea Research, 127, 26-35, https://doi.org/10.1016/j.seares.2017.06.012
    Details
    Publication Date: 2023-03-23
    Description: Denitrification on continental margins and in coastal sediments is a major sink of reactive N in the present nitrogen cycle and a major ecosystem service of eutrophied coastal waters. We analysed the nitrate removal in surface sediments of the Elbe estuary, Wadden Sea, and adjacent German Bight (SE North Sea) during two seasons (spring and summer) along a eutrophication gradient ranging from a high riverine nitrate concentrations at the Elbe Estuary to offshore areas with low nitrate concentrations. The gradient encompassed the full range of sediment types and organic carbon concentrations of the southern North Sea. Based on nitrate penetration depth and concentration gradient in the porewater we estimated benthic nitrate consumption rates assuming either diffusive transport in cohesive sediments or advective transport in permeable sediments. For the latter we derived a mechanistic model of porewater flow. During the peak nitrate discharge of the river Elbe in March, the highest rates of diffusive nitrate uptake were observed in muddy sediments (up to 2.8 mmol/m**2/d). The highest advective uptake rate in that period was observed in permeable sediment and was tenfold higher (up to 32 mmol/m**2/d). The intensity of both diffusive and advective nitrate consumption dropped with the nitrate availability and thus decreased from the Elbe estuary towards offshore stations, and were further decreased during late summer (minimum nitrate discharge) compared to late winter (maximum nitrate discharge). In summary, our rate measurements indicate that the permeable sediment accounts for up to 90 % of the total benthic reactive nitrogen consumption in the study area due to the high efficiency of advective nitrate transport into permeable sediment. Extrapolating the averaged nitrate consumption of different sediment classes to the areas of Elbe Estuary, Wadden Sea and eastern German Bight amounts to an N-loss of 3.1 * 10**6 mol N/d from impermeable, diffusion-controlled sediment, and 5.2 * 10**7 mol N/d from permeable sediment with porewater advection.
    Type: Dataset
    Format: application/zip, 3 datasets
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    DATA PANGAEA
  • 7
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    Permeability and porosity of surface sediments in the German Bight (North Sea)
    PANGAEA
    In:  Supplement to: Neumann, Andreas; Möbius, Jürgen; Hass, H Christian; Puls, Walter; Friedrich, Jana (2016): Empirical model to estimate permeability of surface sediments in the German Bight (North Sea). Journal of Sea Research, https://doi.org/10.1016/j.seares.2016.12.002
    Details
    Publication Date: 2023-05-12
    Description: As the determinant of solute and particle fluxes through sediments, quantifying sediment permeability is vital step in understanding of the exchange phenomena between the water column and sediment as permeability determines the mode and intensity of solute and particle fluxes. Reliable estimates of sediment permeability are therefore a constraint on the accurate implementation of benthic biogeochemical models. This is particularly true for the North Sea, as field data are scarce and available grain-size-based models fail to represent the full range of sediment types. In this study, we combine measurements of sediment permeability and grain size analysis with a generic permeability model to establish a high-resolution permeability map of the sediment in the German Bight (North Sea). Our results show a good agreement between model-based prediction and measurements of permeability, even for a wide range of permeability values.
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Permeability and porosity of North Sea surface sediment sampled during HEINCKE cruise HE412 (2016)
    PANGAEA
    Details
    Publication Date: 2024-01-12
    Keywords: BG; Boomerang-Grab; Date/Time of event; DEPTH, sediment/rock; Elevation of event; Event label; HE412; HE412/02-2; HE412/04-3; HE412/07-11; HE412/07-12; HE412/07-13; HE412/07-15; HE412/07-4; HE412/07-6; HE412/07-9; HE412/09-1; HE412/09-10; HE412/09-13; HE412/09-2; HE412/09-4; HE412/09-6; HE412/09-8; HE412/10-3; HE412/14-4; HE412/20-10; HE412/20-2; HE412/20-3; HE412/20-4; HE412/20-6; HE412/20-8; Heincke; Latitude of event; Longitude of event; MUC; MultiCorer; North Sea; Permeability (earth science); Porosity; van Veen Grab; VGRAB
    Type: Dataset
    Format: text/tab-separated-values, 48 data points
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    DATA PANGAEA
  • 9
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    Permeability and porosity of North Sea surface sediment sampled during HEINCKE cruise HE411 (2016)
    PANGAEA
    Details
    Publication Date: 2024-01-12
    Keywords: Date/Time of event; DEPTH, sediment/rock; Elevation of event; Event label; HE411; HE411/001-2; HE411/004-2; HE411/007-2; HE411/010-1; HE411/014-1; HE411/025-1; HE411/030-1; HE411/036-1; HE411/040-1; HE411/041-1; HE411/045-1; HE411/046-1; HE411/047-1; HE411/048-1; HE411/056-1; HE411/058-1; HE411/061-1; HE411/065-1; HE411/068-1; HE411/069-1; HE411/070-1; HE411/086-1; HE411/091-1; HE411/093-1; HE411/111-1; HE411/112-1; HE411/113-1; HE411/114-1; HE411/120-1; HE411/121-1; HE411/123-1; HE411/124-1; HE411/125-1; HE411/130-1; HE411/131-1; HE411/134-1; HE411/135-1; HE411/139-1; HE411/140-1; HE411/146-1; HE411/151-1; Heincke; Latitude of event; Longitude of event; North Sea; Permeability (earth science); Porosity; van Veen Grab; VGRAB
    Type: Dataset
    Format: text/tab-separated-values, 82 data points
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    DATA PANGAEA
  • 10
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    Nutrients in porewater from German Bight during HEINCKE cruise HE318 in February 2010 (2017)
    PANGAEA
    In:  Helmholtz-Zentrum Geesthacht Centre for Materials and Coastal Research
    Details
    Publication Date: 2024-01-12
    Keywords: Ammonium; Date/Time of event; DEPTH, sediment/rock; Elevation of event; Event label; HE318; HE318/177-3; HE318/180-2; HE318/181-3; HE318/189-2; HE318/191-2; HE318/193-2; HE318/195-2; HE318/196-2; HE318/197-2; HE318/199-2; HE318/209-2; HE318/210-2; HE318/212-2; HE318/214-2; HE318/216-2; Heincke; Latitude of event; Longitude of event; MG; MUC; Multiboxcorer; MultiCorer; Nitrate; Nitrite; North Sea; Phosphate; Sample code/label; Seawater analysis after Grasshoff et al., 1983 (Verlag Chemie GmbH Weinheim)
    Type: Dataset
    Format: text/tab-separated-values, 920 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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