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  • 1
    Electronic Resource
    Electronic Resource
    Distribution of Juvenile, subadult and adult Scylla serrata (Crustacea: Portunidae) on tidal flats in Australia (1982)
    Springer
    Marine biology 69 (1982), S. 117-120 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In Deception Bay, northern Australia, during 1979–1981, a study was made of the distribution of Scylla serrata (Forskal) in an area having a broad intertidal zone. Juveniles (20 to 99 mm carapace width) were resident in the mangrove zone, remaining there during low tide. The majority of subadult crabs (100 to 149 mm) migrated into the intertidal zone to feed at high tide and retreated to subtidal waters at low tide. Adults (150 mm and larger) were caught mainly subtidally and only small numbers were captured in the intertidal at high tide. Few crabs were captured in the coolest months (May to August). Adults were captured on the flats mainly in the warmest months (January to April), but subadults could be captured over the entire summer (September to March). Juveniles were found in the upper intertidal throughout the year.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00396967
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  • 2
    Electronic Resource
    Electronic Resource
    Factors influencing pot catches and population estimates of the portunid crab Scylla serrata (1982)
    Springer
    Marine biology 71 (1982), S. 187-192 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Crab pots were used to sample a population of Scylla serrata (Forskal) in an estuarine area in Queensland, Australia. Pots were laid 100 m apart at fixed positions for 4 d each month for 1 yr (April 1980–June 1981). Data from recapture of tagged crabs showed that males larger than 140 mm carapace width and females larger than 150 mm had a higher capture probability than did smaller crabs; thus size-frequency distributions based on crab-pot captures are biased. Spacing trials showed that pots positioned 50 m apart fished competitively but that there was no difference in catch between those placed 100 and 200 m apart. Catch distribution indicated that the presence of a crab in a pot reduced the probability of further captures. Temperature and incidence of recently moulted crabs accounted for 66% of variation in monthly catches. Catch-per-unit-effort (CPUE) data can be used as a measure of relative abundance of adults if allowance is made for temperature and the incidence of moulting. The capture-mark-release-recapture method for making population estimates was tested but it is concluded that, because of cost and bias in collecting techniques, it cannot be recommended as a technique for studying S. serrata.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00394628
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The spatial structure of the dayside ionospheric trough (1998)
    Springer
    Annales geophysicae 16 (1998), S. 1169-1179 
    Details
    ISSN: 0992-7689
    Keywords: Ionosphere-magnetosphere interactions ; Polar ionosphere ; Radio science ; Ionospheric propagation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Tomographic imaging provides a powerful technique for obtaining images of the spatial distribution of ionospheric electron density at polar latitudes. The method, which involves monitoring radio transmissions from the Navy Navigation Satellite System at a meridional chain of ground receivers, has particular potential for complementing temporal measurements by other observing techniques such as the EISCAT incoherent-scatter radar facility. Tomographic reconstructions are presented here from a two-week campaign in November 1995 that show large-scale structuring of the polar ionosphere. Measurements by the EISCAT radar confirm the authenticity of the technique and provide additional information of the plasma electron and ion temperatures. The dayside trough, persistently observed at high latitudes during a geomagnetically quiet period but migrating to lower latitudes with increasing activity, is discussed in relationship to the pattern of the polarcap convection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-998-1169-4
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  • 4
    Electronic Resource
    Electronic Resource
    EISCAT verification in the development of ionospheric tomography (1997)
    Springer
    Annales geophysicae 14 (1997), S. 1413-1421 
    Details
    ISSN: 0992-7689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract This paper highlights the important role played by the EISCAT radar for verification in the development of tomographic techniques to produce images of ionospheric electron density. A brief review is given of some of the stages in the application of tomographic reconstruction techniques to the ionosphere. Results are presented to illustrate the effectiveness of the method in imaging ionospheric structures at high latitudes. In addition, the results include the first tomographic image of the ionosphere for a region extending from mid-latitudes over mainland Scandinavia to high latitudes above Svalbard.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-996-1413-8
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  • 5
    Electronic Resource
    Electronic Resource
    Imaging of structures in the high-latitude ionosphere: model comparisons (1998)
    Springer
    Annales geophysicae 16 (1998), S. 969-973 
    Details
    ISSN: 0992-7689
    Keywords: Ionosphere (modelling and forecasting; polar ionosphere) ; Radio Science (instruments and techniques)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The tomographic reconstruction technique generates a two-dimensional latitude versus height electron density distribution from sets of slant total electron content measurements (TEC) along ray paths between beacon satellites and ground-based radio receivers. In this note, the technique is applied to TEC values obtained from data simulated by the Sheffield/UCL/SEL Coupled Thermosphere/Ionosphere/Model (CTIM). A comparison of the resulting reconstructed image with the ‘input’ modelled data allows for verification of the reconstruction technique. All the features of the high-latitude ionosphere in the model data are reproduced well in the tomographic image. Reconstructed vertical TEC values follow closely the modelled values, with the F-layer maximum density (NmF2) agreeing generally within about 10%. The method has also been able successfully to reproduce underlying auroral-E ionisation over a restricted latitudinal range in part of the image. The height of the F2 peak is generally in agreement to within about the vertical image resolution (25 km).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-998-0969-x
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Responsible aquaculture can aid food problems (2000)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 406 (2000), S. 673-673 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sir If agriculture were to arise today, knowing what we do about its impacts on the natural environment, biodiversity and poverty, it would probably encounter the same mixed reception as aquaculture. R. L. Naylor et al. give an excellent overview of the serious challenges ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35021300
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  • 7
    Electronic Resource
    Electronic Resource
    Post-deposition relaxation of electronic defects in hydrogenated amorphous silicon (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 1895-1897 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electronically active defects in hydrogenated amorphous silicon thin films, deposited by the conventional glow discharge process in the temperature range between about 225 and 325 °C with ∼10–15 at. % hydrogen, undergo a thermally activated relaxation during film deposition. We determine the kinetics of this relaxation process in films with similar hydrogen concentrations deposited by reactive magnetron sputtering at a substrate temperature of ∼40 °C, and annealed at temperatures greater than 150 °C. We present a quantitative relationship between the relaxation time, and the deposition and/or annealing conditions required to produce low defect density material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.103056
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    An assessment of the angling fishery for yellowfin bream, Acanthopagrus australis (Günther), in Moreton Bay, Australia (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 22 (1983), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Yellowfin bream, Acanthopagrus australis, support an important angling fishery in Moreton Bay, a large estuarine system on the east coast of Australia. An analysis of the records of catches by anglers indicates that abundance and mean size of yellowfin bream have changed little in Moreton Bay during the period 1945 to 1980. Over the past 5 years substantial increases have occurred in the total angling effort for yellowfin bream at surf bar spawning areas in Moreton Bay. This has resulted in a decrease in mean catch per unit effort but no apparent decrease in total yield. Reclamation and development projects which cause degradation of the surf bar spawning areas have the greatest potential to cause reduction in abundance of yellowfin bream in Moreton Bay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1983.tb04732.x
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  • 9
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    Thirty Per Cent: A Study in Casualty Statistics (1964)
    London : Periodicals Archive Online (PAO)
    The RUSI journal. 109 (1964:Feb.) 51 
    Details
    ISSN: 0307-1847
    Topics: Political Science
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:p225-1964-109-00-000009
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  • 10
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    The Treatment of the German Losses on the Somme in the British Official History (1966)
    London : Periodicals Archive Online (PAO)
    The RUSI journal. 111 (1966:Feb.) 69 
    Details
    ISSN: 0307-1847
    Topics: Political Science
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:p225-1966-111-00-000012
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