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  • Articles  (7)
  • Springer  (7)
  • 1990-1994  (7)
  • Geography  (6)
  • Architecture, Civil Engineering, Surveying  (1)
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  • Articles  (7)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    International journal of biometeorology 37 (1993), S. 89-95 
    ISSN: 1432-1254
    Keywords: Airborne pollen ; Airborne spores ; Pollen diagrams ; Meteorological factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract A qualitative and quantitative analysis of airborne pollen and spores was carried out over 2 years (from September 1987 to August 1989) in the city of León. Slides were prepared daily using a volumetric pollen trap, which was placed on the Faculty of Veterinary Science building (University of León) 12m above ground-level. Fifty-one pollen types were observed; the most important of these were: Cupressaceae during the winter,Pinus andQuercus in spring, and Poaceae, Leguminosae and Chenopodiaceae in the summer. The results also showed the existence of a rich mould spore assemblage in the atmosphere. The group of Amerospores (Penicillium, Aspergillus andCladosporium) as well as Dictyospores (Alternaria) were the most abundant;Puccinia was common in the air in August. Fluctuations in the total pollen and spores m3 of air were compared with meteorological parameters (temperature, relative humidity and rainfall). From the daily sampling of the atmosphere of León, considering the maximum and minimum temperature and duration of rainfall, the start of the pollen grain season was observed generally to coincide with a rise in temperature in the absence of rain.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Natural hazards 4 (1991), S. 119-139 
    ISSN: 1573-0840
    Keywords: Tsunamis ; ocean measurements ; model comparisons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract Excellent deep ocean records have been obtained of two tsunamis recently generated in the Alaskan Bight on 30 November 1987 and 6 March 1988, providing the best available data set to date for comparison with tsunami generation/propagation models. Simulations have been performed with SWAN, a nonlinear shallow water numerical model, using source terms estimated by a seafloor deformation model based on the rectangular fault plane formalism. The tsunami waveform obtained from the model is quite sensitive to the specific source assumed. Significant differences were found between the computations and observations of the 30 November 1987 tsunami, suggesting inadequate knowledge of the source characteristics. Fair agreement was found between the data and the model for the first few waves of the 6 March 1988 tsunami. Model estimates of the seismic moment and total slip along the fault plane are also in fair agreement with those derived from the published Harvard centroid solution for the 6 March 1988 event, implying that the computed seafloor deformation does bear some similarity to the actual source.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Materials and structures 24 (1991), S. 346-350 
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Description / Table of Contents: Resume Le besoin pressant se fait sentir partout dans le monde de disposer de méthodesin situ pour détecter le taux de détérioration dans les constructions en béton armé. Dans cet article, on propose deux nouvelles méthodes dérivées de la méthode de résistance de polarisation, mais qui diffèrent de celle-ci en ce qu’elles peuvent s’appliquer aux structures elles-mêmes, malgré la distribution non uniforme des signaux électriques dans ces dernières. Les deux méthodes proposées sont d’une simplicité et d’une sûreté comparables à celles offertes par la mesure directe de résistance de polarisation.
    Notes: Abstract The availability of on-site methods of diagnosis of the deterioration rate in reinforced concrete structures is a pressing technical need all over the world. Two new methods are proposed in this paper which are derived from the polarization resistance method, but which, differing from this method, are applicable to full-size structures, in spite of the non-uniform distribution of the electric signals in them. The two proposed procedures are of a simplicity and reliability comparable with those offered by direct measurement of polarization resistance.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    International journal of salt lake research 3 (1994), S. 1-7 
    ISSN: 1573-8590
    Keywords: energy budget ; Artemia franciscana ; Baja California ; México
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geography
    Notes: Abstract An energy budget forArtemia franciscana is described. Differences between males and females are ascribed to several causes but result in higher rates of female biomass production.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    GeoJournal 30 (1993), S. 293-300 
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Notes: Abstract Spain, which has always been a land of emigrants, is currently a centre of attraction for immigrants, as are other countries in Mediterranean Europe. The proportion is not as high as in other countries with a longer tradition of immigration. In this survey we selected the six nationalities which provide the highest numbers of immigrants from the developing world, and which have the greatest racial or cultural contrast to the native population. We analyse their structural features, whether or not immigrants from the same country are collect in the Madrid Metropolitan Area, the recent mobility of the immigrant population, and the evolution of immigration since the Administration carried out a regularization process, as well as Spaniards' opinion of foreign immigrants.
    Type of Medium: Electronic Resource
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  • 6
    Publication Date: 1993-07-01
    Print ISSN: 0343-2521
    Electronic ISSN: 1572-9893
    Topics: Geography
    Published by Springer
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  • 7
    Publication Date: 1991-01-01
    Print ISSN: 0921-030X
    Electronic ISSN: 1573-0840
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Published by Springer
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