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  • Articles: DFG German National Licenses  (7)
  • 2000-2004
  • 1995-1999  (7)
  • 1999  (7)
Source
  • Articles: DFG German National Licenses  (7)
Material
Years
  • 2000-2004
  • 1995-1999  (7)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    The gene mutated in thiamine-responsive anaemia with diabetes and deafness (TRMA) encodes a functional thiamine transporter (1999)
    [s.l.] : Nature America Inc.
    Nature genetics 22 (1999), S. 305-308 
    Details
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Thiamine-responsive megaloblastic anaemia with diabetes and deafness (TRMA; MIM 249270) is an autosomal recessive disease thought to be due to a defect in thiamine (vitamin B1) transport. Pharmacological doses of thiamine correct the anaemia, and in some cases improve the diabetes, although ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/10379
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    An analysis of diffraction in deep-inelastic scattering (1999)
    Springer
    The European physical journal 7 (1999), S. 443-458 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We propose a simple parametrization for the deep-inelastic diffractive cross section. It contains the contribution of $q\bar{q}$ production to both the longitudinal and the transverse diffractive structure functions, and of the production of $q\bar{q}g$ final states from transverse photons. We start from the hard region and perform a suitable extrapolation into the soft region. We test our model on the 1994 ZEUS and H1 data, and confront it with the H1 conjecture of a singular gluon distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100529801022
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    High-energy QCD as a topological field theory (1999)
    Springer
    The European physical journal 8 (1999), S. 91-102 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We propose an identification of the conformal field theory underlying Lipatov's spin-chain model of high-energy scattering in perturbative QCD. It is a twisted N = 2 supersymmetric topological field theory, which arises as the limiting case of the SL(2,R)/U(1) non-linear $\sigma$ model that also plays a role in describing the Quantum Hall effect and black holes in string theory. The doubly-infinite set of non-trivial integrals of motion of the high-energy spin-chain model displayed by Faddeev and Korchemsky are identified as the Cartan subalgebra of a $W_{\infty} \otimes W_{\infty}$ bosonic sub-symmetry possessed by this topological theory. The renormalization group and an analysis of instanton perturbations yield some understanding why this particular topological spin-chain model emerges in the high-energy limit, and provide a new estimate of the asymptotic behaviour of multi-Reggeized-gluon exchange.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100529901047
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Neutrino textures in light of Super-Kamiokande data and a realistic string model (1999)
    Springer
    The European physical journal 9 (1999), S. 389-408 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Motivated by the Super-Kamiokande atmospheric neutrino data, we discuss possible textures for Majorana and Dirac neutrino masses within the see-saw framework. There are two main purposes of this paper: first, to gain intuition into this area from a purely phenomenological analysis, and second, to explore to what extent it may be realized in a specific model. We comment initially on the simplified two-generation case, emphasizing that large mixing is not incompatible with a large hierarchy of mass eigenvalues. We also emphasize that renormalization-group effects may amplify neutrino mixing, and we present semi-analytic expressions for estimating this amplification. Several examples are then given of three-family neutrino mass textures, which may also accommodate the persistent solar neutrino deficit, with different assumptions for the neutrino Dirac mass matrices. We comment on a few features of neutrino mass textures arising in models with a U(1) flavour symmetry. Finally, we discuss the possible pattern of neutrino masses in a “realistic” flipped SU(5) model derived from string theory, illustrating how a desirable pattern of mixing may emerge. Both small- or large-angle MSW solutions are possible, while a hierarchy of neutrino masses appears more natural than near-degeneracy. This model contains some unanticipated features that may be relevant in other models also: The neutrino Dirac matrices may not be related closely to the quark mass matrices, and the heavy Majorana states may include extra gauge-singlet fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100520050032
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    An Aquifer Management Case Study – The Chalk of the English South Downs (1999)
    Springer
    Water resources management 13 (1999), S. 205-218 
    Details
    ISSN: 1573-1650
    Keywords: groundwater ; management ; monitoring ; pollution prevention ; saline intrusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: Abstract The Chalk aquifer of the English South Downs is very heavily utilised. The groundwater resources have enjoyed a formal programme of management which started in the 1950s, although a number of actions had been taken earlier in order to deal with saline intrusion and potential risk to groundwater quality from urbanisation. In the late 1950s the policy of ‘leakage/storage’ boreholes was first adopted, whereby the ‘leakage’ boreholes along the coast were pumped in winter to intercept fresh water discharge to the sea and to maximise the recharge potential inland, and inland ‘storage’ boreholes were used, as much as possible, in the summer months only. A comprehensive monitoring programme supported by aquifer modelling has enabled a gradual increase in overall abstraction to take place without increasing groundwater degradation due to saline intrusion. There have been various pollution prevention strategies over the years, and these have been effective in protecting the groundwater despite the high population density and widespread agricultural activity within the South Downs. The management of the aquifer has clearly been successful; there are many lessons from this experience that can be applied to other regions and other aquifers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008101727356
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Probing the structure of the pomeron (1999)
    Springer
    The European physical journal 10 (1999), S. 443-460 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We suggest that the pseudo-rapidity cut dependence of diffractive deep-inelastic scattering events at HERA may provide a sensitive test of models of diffraction. A comparison with the experimental cross section shows that the Donnachie-Landshoff model and a simple two-gluon exchange model of the pomeron model are disfavoured. However a model with a direct coupling of the pomeron to quarks is viable for a harder quark–pomeron form factor, as is a model based on the leading-twist operator contribution. We also consider a direct-coupling scalar pomeron model. We comment on the implications of these results for the determination of the partonic structure of the pomeron.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100529900129
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    An integrated assessment modeling framework for assessing primary and secondary impacts from carbon dioxide stabilization scenarios (1999)
    Springer
    Environmental modeling and assessment 4 (1999), S. 45-63 
    Details
    ISSN: 1573-2967
    Keywords: integrated assessment ; secondary impacts ; regional distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract As the nations of the world negotiate future controls on greenhouse gas emissions, a critical environmental policy issue becomes understanding the multiple environmental consequences of these controls. Here we describe an integrated assessment model for quantifying multiple environmental impacts of large-scale environmental initiatives and apply this model to climate change mitigation. Our analysis shows that reductions in global warming will be accompanied by reductions in ozone depletion, acid rain and mercury emissions, and desulfurization waste generation. We also conclude that the largest collateral benefits from reducing global climate change may be in the developing world. This result is critical since it is the developing nations who ultimately control the long-term success of any climate stabilization strategy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019091612617
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    Paper (German National Licenses)
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