9,876 research outputs found
Risk attitude, beliefs, and information in a corruption game: An experimental analysis
For our experiment on corruption we designed a coordination game to model the influence of risk attitudes, beliefs, and information on behavioral choices and determined the equilibria. We observed that the participants' risk attitudes failed to explain their choices between corrupt and non-corrupt behavior. Instead, beliefs appeared to be a better predictor of whether or not they would opt for the corrupt alternative. Furthermore, varying the quantity of information available to players (modeled by changing the degree of uncertainty) provided additional insight into the players' propensity to engage in corrupt behavior. The experimental results show that a higher degree of uncertainty in the informational setting reduces corruption. --Corruption,game theory,experiment,risk attitude,beliefs
Nonautonomous Spectral Submanifolds for Model Reduction of Nonlinear Mechanical Systems under Parametric Resonance
We use the recent theory of Spectral Submanifolds (SSM) for model reduction
of nonlinear mechanical systems subject to parametric excitations.
Specifically, we develop expressions for higher-order nonautonomous terms in
the parameterization of SSMs and their reduced dynamics. We provide these
results both for general first-order as well as second-order mechanical systems
under periodic and quasiperiodic excitation using a multi-index based approach,
thereby optimizing memory requirements and the computational procedure. We
further provide theoretical results that simplify the SSM parametrization for
general second-order dynamical systems. More practically, we show how the
reduced dynamics on the SSM can be used to extract the resonance tongues and
the forced response around the principal resonances in parametrically excited
systems. In the case of two-dimensional SSMs, we formulate explicit expressions
for computing the steady-state response as the zero-level set of a
two-dimensional function for systems that are subject to external as well as
parametric excitation. This allows us to parallelize the computation of the
forced response over the range of excitation frequencies. We demonstrate our
results on several examples of varying complexity, including finite-element
type examples of mechanical systems. Furthermore, we provide an open-source
implementation of all these results in the software package SSMTool
Oceanic three-dimensional Lagrangian Coherent Structures: A study of a mesoscale eddy in the Benguela ocean region
We study three dimensional oceanic Lagrangian Coherent Structures (LCSs) in
the Benguela region, as obtained from an output of the ROMS model. To do that
we first compute Finite-Size Lyapunov exponent (FSLE) fields in the region
volume, characterizing mesoscale stirring and mixing. Average FSLE values show
a general decreasing trend with depth, but there is a local maximum at about
100 m depth. LCSs are extracted as ridges of the calculated FSLE fields. They
present a "curtain-like" geometry in which the strongest attracting and
repelling structures appear as quasivertical surfaces. LCSs around a particular
cyclonic eddy, pinched off from the upwelling front are also calculated. The
LCSs are confirmed to provide pathways and barriers to transport in and out of
the eddy
Perfectly localized Majorana corner modes in fermionic lattices
Focusing on examples of Majorana zero modes on the corners of a
two-dimensional lattice, we introduce a method to find parameter regions where
the Majorana modes are perfectly localized on a single site. Such a limit
allows us to study the dimerization structure of the sparse bulk Hamiltonian
that results in the higher-order topology of the system. Furthermore, such
limits typically provide an analytical understanding of the system energy
scales. Based on the dimerization structure we extract from the two-dimensional
model, we identify a more general stacking procedure to construct Majorana zero
modes in arbitrary corners of a -dimensional hypercube, which we demonstrate
explicitly in .Comment: 12 pages, 12 figure
Marketing im liberalisierten Strommarkt
Im Fokus dieser Arbeit steht der Wandlungsprozess in Österreichs Stromwirtschaft aus Sicht des Marketings für Privatkunden im Gefolge der Liberalisierung und Privatisierung des ehemals monopolistisch organisierten Sektors. Die Arbeit liefert die Ergebnisse einer umfassenden empirischen Untersuchung, die durch einen innovativen Forschungszutritt geprägt ist. Es werden sowohl qualitative als auch quantitative Methoden der empirischen Sozialforschung kombiniert, deren komplementäre Funktion damit eindrucksvoll belegt wird. Zielsetzung ist, die Gestaltung des Produktes Strom an der Präferenz der nachfragenden Konsumenten zu orientieren und mit Hilfe der Conjoint-Analyse die Produktgestaltung zu optimieren. Des Weiteren wird ein Messinstrument zur Erfassung des Involvements mit Strom entwickelt. Dem Anspruch einer realtheoretischen Forschung folgend werden zahlreiche Handlungsempfehlungen aufgezeigt
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