3,221 research outputs found
Wallensteinâs Power Problem and Its Consequences
This paper wants to be both: an introduction to game-theoretical thinking as well as a game-theoretical discussion of Schillerâs Wallenstein. Note that the intention of this article is to convince theatergoers and people who work in the theatrical arts that it is worthwhile to study some game theory. Others will hopefully profit from the unusual Wallenstein interpretation. It is not this articleâs purpose to teach game theorists, but rather to inspire applications. The drama is depicted as a game and consequently submitted to a formal analysis that is based on the economic concept of rationality. Weberâs definition of power is operationalized and applied to Wallensteinâs decision situation.Power, bargaining, mixed-strategy Nash equilibrium, theater, Wallenstein
Phenomenological scaling laws for ââsemidiluteââ macromolecule solutions from light scattering by optical probe particles
Polymer solution dynamics may be inferred from light scattering spectra of dissolved optical probe particles. We compare a variety of probes in solutions of several polymers. In the ââoverlappingââ concentration/molecular weight regime, the StokesâEinstein equation fails by up to a factor of 2, while the probe diffusion coefficient D follows a scaling law D/D0=exp(âaMÎłcνRδ) (c, M, and R are the polymer concentration, molecular weight, and the probe radius, respectively). Experimentally, Îł=0.8Âą0.1, ν=0.6â1.0, and δ=â0.1 to 0, contrary to the theoretical predictions Îł=0 and δ=1. With very high molecularâweight polymers, we observe a further ââentangledââ regime, characterized by huge (104) failures of the StokesâEinstein equation and the appearance of ââfastââ modes in the scattering spectrum.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70873/2/JCPSA6-82-11-5242-1.pd
Asymmetry and performance metrics for equity returns
An assumption of symmetric asset returns, together with globally risk averse utility
functions, is unappealing for fund managers and other activist investors, whose preferences
switch between risk aversion on the downside and risk seeking on the upside. A performance
return criterion is originated that is more consistent with the implicit Friedman-Savage utility
ordering. Adapted from recent developments in the income distribution literature, the proposed
metric weights the lower versus upper conditional expected returns, while a dual spread or
dispersion metric also exists. The resulting performance metric is easy to compute. A point of
departure is the conventional Sharpe performance ratio, with the empirical comparisons extending
to a range of existing performance criteria. In contrast, the proposed W-metric results in
different and more embracing performance rankings
Features of pulsed synchronization of a systems with a tree-dimensional phase space
Features of synchronization picture in the system with the limit cycle
embedded in a three-dimensional phase space are considered. By the example of
Ressler system and Dmitriev - Kislov generator under the action of a periodic
sequence of delta - function it is shown, that synchronization picture
significantly depends on the direction of pulse action. Features of
synchronization tons appeared in these models are observed.Comment: 16 pages, 11 figure
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