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  • 1
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The principles and operation at Joint European Torus (JET) of the first magnetic proton recoil (MPR) spectrometer for measurement of fusion neutron spectra are described. Some technical aspects of the instrument are discussed, including energy calibration and monitoring system. Data from the recent experimental campaign with tritium at JET are presented as examples of the MPR's diagnostic abilities. It is shown that the spectrometer is a flexible and versatile instrument, capable of delivering high-quality data on a number of plasma parameters. In particular, the observation of the so-called α knock-on effect in neutron emission spectroscopy is discussed. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of bioeconomics 2 (2000), S. 117-132 
    ISSN: 1573-6989
    Keywords: bioeconomics ; moose management ; policy ; predation ; selective hunting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Economics
    Notes: Abstract Seeking to act as prudent predators in many biological systems, humans try to harvest in a sustainable manner. In Sweden, wildlife managers and moose hunters use information about the future contribution of individual moose to population growth (i.e., their reproductive value), in order to harvest low-and non-reproductive animals. This selective harvest strategy results in a significantly faster overall population growth rate. To investigate whether this selective harvest policy is economically beneficial, we calculated the present value of the selective moose hunting policy used in Sweden compared to the present value of a non-regulated (i.e. random) moose harvest. Present values of the moose hunting produced by the different hunting regimes were calculated for a period of ten years and at interest rates ranging between 1% and 10%. The difference in present value between the selective hunting policy and the average outcome of random harvesting was SEK 310 million ($ 36 million) and SEK 300 million ($ 34 million), or SEK 1 321 ($ 154) and SEK 1 279 ($ 149) for an average moose hunter, when using interest rates of 3% and 4%, respectively. To determine whether the current selective moose hunting policy is economically profitable or not, benefit estimates like these should be weighted against the costs of upholding the policy. Most of the costs probably lie in providing the hunters with information about the future harvesting prospects and reducing the risk of divergences from the policy. The welfare effects of a hunting policy will also be dependent on the individual hunter's preferences, for instance in terms of their attitudes towards risk.
    Type of Medium: Electronic Resource
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