Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 657.
  1. Library Resource
    Articles et Livres
    octobre, 2014
    Japon

    Winter wheat is an important crop for many countries, and monitoring of its planted area is considered important. Optical sensors have been used to monitor agricultural land, and have shown good classification and monitoring capabilities. However, observations using optical sensors sometimes suffer from interference due to cloud cover or rain. In contrast, synthetic aperture radars (SAR) can be used for Earth observation even under rainy, cloudy or dark conditions, hence SAR is expected to be effective in monitoring agricultural fields and identifying winter wheat fields.

  2. Library Resource
    Articles et Livres
    juillet, 2017
    Japon

    In this study, we compared pixel-based image analysis and object-based image analysis (OBIA) as methods of land cover classification of urban areas, using high resolution digital aerial photography. The study area was Setagaya Ward, Tokyo, Japan, and we carried out supervised classification using aerial photographs with 25-cm spatial resolution, and with both visible bands and a near infrared band. The overall accuracy of the object-based classification was approximately 6 to 20 percentage points higher than that of the pixel-based classification.

  3. Library Resource
    Articles et Livres
    juin, 2014
    Japon

    Rice terraces are paddy fields made on sloping land that follow the natural contour lines, suited to the Japanese landscape. The terraces blend in with the natural scenery and give viewers a great sense of peace and comfort. Rice terraces are also growing into a focus of agro tourism. However, farming on these rice terraces has low labor productivity, and with the advancing age of the farmers in the mountainous areas, it has become difficult for them to continue farming on the rice terraces. Their abandonment is now noticeable. For this research, one city sustaining the rice terraces viz.

  4. Library Resource
    Articles et Livres
    octobre, 2014
    Japon

    This paper describes a method for monitoring winter wheat growth using multi-temporal TerraSAR-X dual-polarimetric data. Six TerraSAR-X HH/VV images were collected in Hokkaido, and the temporal responses to the winter wheat fields were analyzed. The height, moisture content and dry matter of the crops were measured at nearly the same time as TerraSAR-X data was acquired, and the relationships between these parameters and SAR data, including sigma naught and coherence, were studied. Quadratic relationships between the crop height and sigma naught were observed for HH polarization.

  5. Library Resource
    Articles et Livres
    juillet, 2010
    Chine

    Taking Daxing District, Beijing, China as a example, benefit evaluation index system of small-town land comprehensive consolidation is established from four aspects of resource benefit, economic benefit, social benefit and ecological benefit. Weight of evaluation index is determined by analytic hierarchy process. After the standardized treatment on the original value index, comprehensive index method is adopted to evaluate the land comprehensive consolidation benefits in 14 towns of Daxing District in the year 2005, combining with the index weight determined by analytic hierarchy process.

  6. Library Resource
    Articles et Livres
    mars, 2013
    Japon

    Vegetation mapping provides basic information for forest management and planning. In remote sensing research, the process of creating an accurate vegetation map is an important subject. Recently, there has been growing research interest in the object-oriented image classification techniques. The object-oriented image classification consists of multi-dimensional features including object features and thus requires multi-dimensional image classification approaches.

  7. Library Resource
    Articles et Livres
    octobre, 2014
    Japon

    Amphotericin B (AmB) is a polyene antifungal drug and is reported to be one of a few reagents having therapeutic effects on prion diseases, that is, a delay in the appearance of clinical signs and prolongation of the survival time in an animal model. In prion diseases, glial cells have been suggested to play important roles; however, the therapeutic mechanism of AmB on prion diseases remains elusive. We have previously reported that AmB changed the expression of neurotrophic factors in microglia and astrocytes (Motoyoshi et al., 2008, Neurochem. Int.

  8. Library Resource
    Documents et rapports de conférence
    décembre, 2011
    Brésil, États-Unis d'Amérique, Chine, Global

    The economic and land use consequences of US biofuel programs and their contributions to GHG emissions have been the focal point of many debates and research studies in recent years. However, most of these studies focused on the land use emissions due to the first generation of biofuels such as corn ethanol, sugarcane ethanol, and biodiesel (e.g. [1, 2] [3, 4]). A quick literature review indicates that only a few attempts have been made to estimate these emissions for the second generation of biofuels which convert cellulosic materials into liquid fuels. Gurgel et al.

  9. Library Resource
    Articles et Livres
    septembre, 2013
    Japon

    A literature review about the farmland accumulation and the farmland market problem in Marxian economics was performed. Analysis of farmland accumulation and the farmland market has been conducted by relating to agricultural capitalization. In other words, research was advanced as a differentiation of the farmer class theory, and competition between the large-scale farm and small-scale farm has attracted attention.

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