inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (335 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • C 14 dating ; Environment ; Environmental degradation ; Forest ; Himalaya ; Historical geography ; Human impact ; Land use ; National park ; Nepal ; Palynology ; Pastureland ; Pollen analysis ; Soil
  • Forest structure, soils, pollen analysis, 14-C dating of buried wood samples, historical documents and contemporary land-use trends of herders and trekkers are all lines of evidence used to determine the degree of disturbance in this Serpa area
  • 1996
  • C 14 dating ; Diatom ; European part of Russia ; Holocene ; Lake ; Lake level ; Palaeogeography ; Peat ; Pollen analysis ; Saint Petersburg ; Stratigraphy
  • Two new sections have been discovered in the River Neva Valley, which connects Lake Ladoga with the Gulf of Finland of the Baltic Sea. The radiocarbon dates, as well as pollen and diatom analyses of the new sections, support previous ideas
  • 1996
  • C 14 dating ; Dendrochronology ; Ecosystem ; Forest ; Holocene ; Insect ; Microstructure ; North America ; Pollen analysis ; Vegetation degradation
  • 1996
  • Climatic variation ; Cluster analysis ; Fossil fauna ; Insect ; Palaeo-environment ; Pennsylvania ; Pleistocene ; Pollen analysis ; Quaternary ; United States of America
  • 1996
  • Canada ; Glacial features ; Moraine ; Palaeobiogeography ; Palynology ; Phytogeography ; Pollen analysis ; Principal components analysis ; Quaternary ; Quebec
  • 1996
  • Aeolian features ; Africa ; Atmospheric circulation ; Canary Islands ; Core sampling ; Lateglacial ; Marine sediment ; Model ; Morocco ; Palaeoclimatology ; Pollen analysis ; Sahara ; Sea current ; Trade wind ; Tropical zone ; Wind
  • 1996
  • British Columbia ; C 14 dating ; Canada ; Mammal ; Palaeo-environment ; Palynology ; Pollen analysis ; Quaternary ; Stratigraphy ; Wisconsinan
  • 1996
  • Alluvial cone ; Canada ; Forest ; Palynology ; Plant canopy ; Pollen analysis ; Postglacial ; Quaternary ; Quebec ; Saint-Laurent ; Sedimentation ; Watershed
  • 1996
  • conclusion drawn from pollen analysis: progressive phases of human-induced land use change have dominated the recent environmental history of Verlorenvlei, and have overtaken sea-level change as the major local determinant of vegetation in and around the site
  • 1996
  • C 14 dating ; Endoreic drainage ; Lacustrine sediment ; Lake ; Micro-organism ; Palaeo-environment ; Palaeontology ; Palynology ; Pollen analysis ; Quaternary ; Semi-arid area ; Spain ; Stratigraphy ; Valencia
  • 1996
  • Biostratigraphy ; Canada ; Estuary ; Lithostratigraphy ; Palaeo-environment ; Palaeoclimatology ; Palynology ; Plant cover ; Pleistocene ; Pollen analysis ; Quaternary ; Quebec ; Saint-Laurent ; Sedimentation
  • 1996
  • Fuzzy sets and series analysis for visual decision support in spatial data exploration
  • Classification ; Research technique ; Sensitivity analysis ; Spatial analysis ; Spatial statistics
  • The research underlying this Ph.D. thesis concerns the development of procedures for evaluating predefined classification techniques for spatial data. The definition of fuzzy sets and the analysis of fuzzy series are proposed as tools
  • for the sensitivity analysis of spatial data in predefined classes. Several measures can be used to provide quality information that reflects the risk associated with the straightforward application of Boolean classes. The correct and unambiguous communication
  • 1996
  • Working in the global food system: a focus for international comparative analysis
  • The A. proposes a conceptual and methodological focus for international comparative analysis which addresses the dialectical tension between the local and global. He offers an overview of the relevant work concerning global/local linkages
  • 1996
  • Analysis of the fumigation effect on pollutants over Pietermaritzburg
  • Analysis of meteorological and pollutant parameters over central Pietermaritzburg over a 12-month period revealed the marked effect of local climate ondiurnal variations in pollutants concentration. The refinements to monitoring programmes
  • 1996
  • Aggregation ; Demographic structure ; Model ; Spatial analysis ; Statistical bias ; Statistics ; United Kingdom
  • in the analysis of individual-level data can be magnified when the analysis based on aggregated data is carried out. The models provide an approach to the problem of adjusting an area-level analysis to correct for aggregation effects. The data come from the 1991
  • 1996
  • Provenance and dispersion of fluvial, beach and shelf sands in the Bassa Maremma coastal system (central Italy): an integrated approach using Fourier shape analysis, grain size and seismic data
  • This study is an analysis of geographically related surface samples from offshore, fluvial and sandybeach environments, along a section of coast northeast of Rome, Italy. It examines the potential of size and Fourier shape analysis to define
  • 1996
  • Cluster analysis ; Czech Republic ; Factor analysis ; Geochemistry ; Grain size distribution ; Longitudinal section ; Pollution ; Stream ; Suspended load ; Trace-element
  • This work describes the distribution of 45 elements accumulated in 26 samples of surface bottom sediments from the 364.4 km-long Czech part of the Elbe River. The total metal concentration was subjected to factor analysis and cluster analysis. Most
  • of the contaminants in the bottom sediments appear to be bonded to hydrated Fe and Mn oxides and to particulate loading. Possible pollution sources were found by cluster analysis.
  • 1996
  • Using spectral analysis to detect sensor noise and correct turbulence intensity and shear stress estimates from EMCM flow records
  • Fluvial hydrology ; Methodology ; Spectral analysis ; Statistics ; Stream ; Stream flow ; Turbulence
  • This paper demonstrates the usefulness of spectral analysis to detect and characterize narrow-band noise components in turbulent flow records. Statistical principles underlying the use of spectral analysis for noise detection are briefly reviewed
  • 1996
  • A long-run interpretation of regional input-output analysis
  • Economic equilibrium ; Factor of production ; Input-output model ; Neo-classical model ; Regional analysis ; Regional economy ; Simulation
  • 1996
  • Crumbling land: the postmodernity debate and the analysis of environmental problems
  • and nature. The A. argues that there are difficulties in using poststructuralist epistemologies for the analysis of environmental problems. He shows how ideas drawn from critical realism can help to recognize where ontological and epistemological issues have
  • 1996