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  1. Nuclear reference data, materials and measurements

    Reliable measurements of α, β and γ radiation are of great importance for environmental monitoring, medical treatment and nuclear safeguards. The JRC's radionuclide metrology laboratories provide important nuclear decay data such as radionuclide half ...

    30 April 2014

  2. Digital Earth

    Digital Earth is a concept of an interactive digital replica of the entire planet that can facilitate a shared understanding of the multiple relationships between the physical and natural environments and society. To do so, it needs to be accessible globa ...

    30 April 2014

  3. A pan-European River and Catchment Database

    Digital data on river networks, lakes and drainage basins (catchments) are an important pre-requisite for modelling hydrological processes, including the analysis of pressures and their impact on water resources. Datasets covering extensive areas such as ...

    30 April 2014

  4. Validation of aircraft height extraction from Worldview-1 stereo data

    The satellite Worldview-1 was launched in September 2007; the optical sensor is acquiring panchromatic data of 0.5 m geometric resolution at nadir. A stereo data set covering an urban area was provided by DigitalGlobe to evaluate the potential of object h ...

    30 April 2014

  5. Pan-European Risk Management in SDIs

    This report describes the ORCHESTRA pilot for pan-European hazard-assessment (PEUNHA). ORCHESTRA stands for Open Architecture and Spatial Data Infrastructure for Risk Management. As an Integrated Project, ORCHESTRA was partly funded by the European Commis ...

    30 April 2014

  6. Change detection based on information measure

    A new unsupervised change detection method for modeling nonlinear temporal dependences based on local information is proposed. A theoretical analysis is presented, demonstrating how to derive optimal parameters for automating the method. It is then valida ...

    30 April 2014

  7. New work on updating and extending the Nuclear Data Standards

    An IAEA Data Development Project was initiated to provide a mechanism for allowing new experimental data and improvements in evaluation procedure to be incorporated into new evaluations of the standards. The work on this project is ongoing. In the past ve ...

    30 April 2014

  8. Pre-processing of a sample of multi-scene and multi-date Landsat imagery used to monitor forest cover changes over the tropics

    In support to the Remote Sensing Survey of the global Forest Resource Assessment (FRA) 2010 of the United Nations Food and Agricultural Organization (UNFAO), the TREES-3 project of the Joint Research Centre aims at measuring quantitatively forest cover ch ...

    30 April 2014

  9. Improving Geodatabase Semantic Querying Exploiting Ontologies

    Geospatial semantic querying to geographical databases has been recognized as an hot topic in GIS research. Most approaches propose to adopt an ontology as a knowledge representation structure on top of the database, representing the concepts the user can ...

    30 April 2014

  10. A satellite data set for tropical forest area change assessment

    A database of largely cloud-free (less than 2.5% of all sites have more than 5% cloud cover), geo-referenced, 20 km by 20 km sample sites of 30 m resolution optical satellite imagery has been prepared for the 1990 and 2000 epochs. This spans the tropics w ...

    30 April 2014

  11. Which Indicators for Monitoring Forests within Natura 2000 Sites?

    This research project had as a primary objective the implementation of indicators based on remote sensing data and associated GIS techniques, to report on the conservation status of forests protected within Alpine Natura 2000. Attention was focused on the ...

    30 April 2014

  12. Tropical Forest Mapping at Regional Scale using the GRFM SAR Mosaics over Amazon in South America

    Main focus of the work described in this thesis is on the estimation of tropical vegetation cover using as data source continental scale Synthetic Aperture Radar (SAR) mosaics at 100 m spatial resolution. These radar mosaics were acquired over the South A ...

    30 April 2014

  13. A new Approach to estimate Isotopic Ratios in Nuclear and Radiological Materials from Nuclear Spectrometric Measurements with Count Rates Close to Background.

    Quantification and interpretation of isotopic ratios is generally acknowledged as a powerful method in nuclear forensic analyses to identify the origin of nuclear and radiological materials or the contamination source of environmental media. Nuclear spect ...

    30 April 2014

  14. Validation of Dynamic Light Scattering and Centrifugal Liquid Sedimentation Methods for Nanoparticle Characterisation

    A variety of techniques exists to analyse the size and size distribution of nanoparticles in a suspension. However, neither full method validation reports nor suitable reference materials with properly assigned values traceable to SI are easily found in t ...

    30 April 2014

  15. Feasibility study on the development of uranium reference particles for mass spectrometric analysis in nuclear safeguards

    Recently, an improved method allowing the accurate determination of the isotopic composition of single sub-micrometer sized uranium oxide particles (< 1 micrometer) has been developed at the Institute for Reference Materials and Measurements (IRMM) in ...

    30 April 2014

  16. Monthly soil erosion monitoring based on remotely sensed biophysical parameters: a case study in Strymonas river basin towards a functional pan-European service

    Currently, many soil erosion studies at local, regional, national or continental scale use models based on the USLE-family approaches. Applications of these models pay little attention to seasonal changes, despite evidence in the literature which suggests ...

    30 April 2014

  17. Analysis of earth observation time series to investigate the relation between rainfall, vegetation dynamic and streamflow in the Uele' basin (Central African Republic)

    The hydrology of tropical forests play a key role in watershed processes such as soil erosion, streamflow and ground water recharge. However, tropical forests of Africa are least investigated due to the poor network for data acquisition. Earth Observation ...

    30 April 2014

  18. Measurement of the 230U half-life

    The 230U half-life was determined by measuring the decay curve of 230U sources by various nuclear detection techniques: alpha-particle counting at a defined small solid angle; 4pi alpha+beta counting with a windowless CsI sandwich spectrometer, a liquid s ...

    30 April 2014

  19. High-resolution alpha-particle spectrometry of the 230U decay series

    High-resolution alpha-particle spectrometry was performed on the 230U decay series. A 230U source was prepared on stainless steel disk by electrodeposition in an ammonium nitrate solution. Spectrometry of the alpha-particle energy spectrum was performed w ...

    30 April 2014

  20. Measurements of the half-life of 214Po and 218Rn using digital electronics

    The half-lives of 214Po and 218Rn have been measured. The radionuclides were produced in the decay of a 230U source and the emitted alpha-particles were measured in nearly-2 pi geometry with an ion-implanted planar silicon detector. The data acquisition w ...

    30 April 2014

  21. Measurement of the 226Th and 222Ra half-lives

    The half-lives of 226Th and 222Ra were measured by counting alpha-particle emissions from sources as a function of time. The 226Th sources were prepared from an open 230U source, capturing recoil atoms after alpha-particle decay on glass disks or even dir ...

    30 April 2014

  22. An Urn Occupancy Approach for Cognitive Radio Networks in DTVB White Spaces

    Cognitive Radio paradigm has recently received considerable interest to address the so called?spectrum scarcity? problem. In the USA, the Federal Communications Commission recently issued the regulatory for the use of cognitive radio in the TV white space ...

    30 April 2014

  23. Distribution of 60Co in steel samples from Hiroshima

    This paper describes ultra low-level gamma-ray spectrometry measurements of the 60Co activity distribution inside one 52 mm and one 41 mm thick steel sample. The samples had been exposed to the Hiroshima atomic bomb and were from the Aioi bridge and the Y ...

    30 April 2014

  24. STEFFY- software to calculate nuclide-specific total counting efficiency in well-type gamma-ray detectors

    A software package is presented to calculate the total counting efficiency for the decay of radionuclides in a well-type gamma-ray detector. It is specifically applied to primary standardisation of activity by means of 4-pi-gamma-counting with a NaI(Tl) w ...

    30 April 2014

  25. Automatic Detection and Segmentation of Orchards Using Very High-Resolution Imagery

    Spectral information alone is often not sufficient to distinguish certain terrain classes such as permanent crops like orchards, vineyards, and olive groves from other types of vegetation. However, instances of these classes possess distinctive spatial st ...

    30 April 2014