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  • 2020-2022
  • 1985-1989  (3)
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  • 1989  (3)
  • 1
    ISSN: 1573-0417
    Keywords: Stephanodiscus ; diatom ; eutrophication ; morphology ; core ; sediments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Stephanodiscus niagarae populations in a core from Lake Ontario show systematic variation in radial puncta number and mean valve diameter. Puncta number is stable in specimens from samples deposited between 1720 and 1844. Puncta number gradually increases in samples deposited between 1860 and 1947, then increases rapidly to high numbers in samples deposited after 1964. Mean valve diameter is relatively high in specimens from samples deposited between 1720 and 1959. Diameter of specimens deposited during this period fluctuates around a mean of 63.2 μm. Mean diameter of specimens deposited from 1959 to 1980 is only 42.5 μm. We conclude that the trend in puncta number reflects the time course of eutrophication in Lake Ontario. We interpret the precipitous decline in mean diameter as an indication that conditions in the lake after the late 1950's did not permit sexual reproduction in this species.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Theory and decision 26 (1989), S. 235-251 
    ISSN: 1573-7187
    Keywords: proxy contests ; corporate control ; cooperative games ; voting games ; Shapley values ; quarrellers ; core ; φ-stable pairs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Sociology , Economics
    Notes: Abstract Proxy fights have received comparatively little attention relative to the more popular methods for corporate control transfer: merger and tender offers. This paper presents an analytic model of the proxy contest as a cooperative game with four players: management, passive shareholders, insurgent shareholders and a trust fund. The power of the players and the effectiveness of certain managerial actions is discussed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Mathematical methods of operations research 33 (1989), S. 405-422 
    ISSN: 1432-5217
    Keywords: games ; restricted cooperation ; core ; convex functions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Description / Table of Contents: Zusammenfassung Spiele mit beschränkter Kooperation sind kooperativeN-Personenspiele mit Nebenzahlungen, wobei nicht jede Teilmenge von Spielern zulässig zu sein braucht. In diesem Sinn sind die Kooperationsmöglichkeiten beschränkt. Balancierte und vollständig balancierte Spiele werden in diesem Zusammenhang untersucht. Die entsprechenden Sätze über die Existenz von Kernen werden von einem Sandwichsatz über Mengenfunktionen im Rahmen der linearen Programmierung abgeleitet. Insbesondere werden allgemeine konvexe Spiele diskutiert, deren Bedeutung auch für die kombinatorische Optimierung Edmonds and Giles (1977) aufgezeigt haben.
    Notes: Abstract Games with restricted cooperation are cooperativeN-person games with sidepayments, where the collection of feasible coalitions need not comprise all subsets of players and thus is restricted. We study balanced and completely balanced games in this context and derive the corresponding core theorems from a sandwich theorem for set functions within the setting of linear programming. In particular, we discuss general convex games, which Edmonds and Giles (1977) have shown to be of particular importance also in combinatorial optimization.
    Type of Medium: Electronic Resource
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