1,084 research outputs found

    Use of LANDSAT imagery for wildlife habitat mapping in northeast and east central Alaska

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    The author has identified the following significant results. Two scenes were analyzed by applying an iterative cluster analysis to a 2% random data sample and then using the resulting clusters as a training set basis for maximum likelihood classification. Twenty-six and twenty-seven categorical classes, respectively resulted from this process. The majority of classes in each case were quite specific vegetation types; each of these types has specific value as moose habitat

    Application of ERTS-1 imagery to the study of caribou movements and winter dispersal in relation to prevailing snowcover

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    There are no author-identified significant results in this report

    Application of ERTS-1 imagery to the study of caribou movements and winter dispersal in relation to prevailing snowcover

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    There are no author-identified significant results in this report

    Application of ERTS-1 imagery to the study of caribou movements and winter dispersal in relation to prevailing snowcover

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    The author has identified the following significant results. A multiband classification scheme was applied to ERTS-1 MSS digital tape data in a portion of the Yukon Flats area. Primary analytic objectives of mapping the extent of recent wildfire burns and mature forest were realized illustrating application to moose and caribou biology. Additionally, the analysis indicated the presence of new lakes as well as disappearance of lakes present in 1956. Because this is an important waterfowl production area, similar analyses may have significant application potential to waterfowl biology for rapid updating of habitat information. Further field confirmation of this finding is required

    Use of LANDSAT imagery for wildlife habitat mapping in northeast and eastcentral Alaska

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    The author has identified the following significant results. Winter and summer moose range maps of three selected areas were produced (1:63,360 scale). The analytic approach is very similar to modified clustering. Preliminary results indicate that this method is not only more accurate but considerably less expensive than supervised classification techniques

    Use of LANDSAT imagery for wildlife habitat mapping in northeast and eastcentral Alaska

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    The author has identified the following significant results. There is strong indication that spatially rare feature classes may be missed in clustering classifications based on 2% random sampling. Therefore, it seems advisable to augment random sampling for cluster analysis with directed sampling of any spatially rare features which are relevant to the analysis

    Application of ERTS imagery to the study of caribou movements and winter habitat

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    There are no author-identified significant results in this report

    Use of LANDSAT imagery for wildlife habitat mapping in northeast and east central Alaska

    Get PDF
    There are no author-identified significant results in this report

    Home ranges, movements and spatial relationships in an expanding population of black rhinoceros

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    Over 3000 sightings and fixes of individually identified black rhinoceros (Diceros bicornis minor ) over a 14-year period provided information on the spatial organization and movements of these introduced animals and their offspring in the Great Fish River Reserve, South Africa. Core home ranges based on 50% adaptive kernel calculations proved useful for depicting spatial associations among individuals and shifts in areas of occupation. The mean home range size (minimum convex polygon) was 11.7 km 2 and that of core adaptive kernel 6.8 km 2 . Annual and individual variations in home range size were great and social factors clearly affected size. For these and other reasons great caution is recommended in interpretation and inter-population comparisons of home range sizes. Most individuals in this expanding population showed mobility, with home ranges shifting over time. Although clearly exhibiting individual home ranges, most females associated in clusters of three or more individuals. Calves generally moved away from their mothers at the time of her next calving, but some subsequently moved back into their mothers' core home range. In addition to mother-offspring pairs, some females also showed multiple-year associations in these clusters. Male home ranges overlapped, and individuals showed multiple-year associations until they reached approximately nine years of age. Males over age 8 were rarely sighted in the core home range of other similarly aged males

    Emergence of a confined state in a weakly bent wire

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    In this paper we use a simple straightforward technique to investigate the emergence of a bound state in a weakly bent wire. We show that the bend behaves like an infinitely shallow potential well, and in the limit of small bending angle and low energy the bend can be presented by a simple 1D delta function potential.Comment: 4 pages, 3 Postscript figures (uses Revtex); added references and rewritte
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