10,298 research outputs found
Limitation of Sales Warranties as an Alternative to Intellectual Property Rights: An Empirical Analysis of IPhone Warranties’ Deterrent Impact on Consumers
Apple\u27s success with the Apple iPhone has brought with it certain problems. Its success has engendered a community that has attempted to circumvent Apple\u27s exclusive service agreement with AT&T. Unfortunately for Apple (and similarly situated manufacturers), intellectual property law allows consumers to alter their products so as to circumvent relationships that manufacturers may have with others. The patent and copyright law first sale doctrine allows consumers to manipulate a product after it is purchased. As a result, manufacturers are increasingly turning to alternatives to intellectual property to secure control over the device after the sale. One such alternative is the exclusion of warranty under Article 2 of the Uniform Commercial Code. This iBrief considers whether limitation of warranties have the deterrence effect manufacturers desire. Said differently, it considers whether manufacturers can use warranty limitations to prevent consumers from using their products in an unauthorized manner. The iBrief presents a behavioral model based on the Triandis model of planned behavior and enhances the model by accounting for likely and unlikely benefits and detriments. The model suggests that participants weigh the probability and magnitude of the detriment against the probability and magnitude of the beneficial impact when making the decision to engage in technological piracy. This model, considered with other empirical evidence, suggests that Apple\u27s warranty could be a stronger deterrent for consumers than civil liability. The iBrief concludes that manufacturers can better protect their post-sale expectation of profits by raising consumer awareness of their warranty\u27s quality and by raising awareness of the consequences for using the product in a way that is outside the terms of the consumers\u27 authorized use
On Optimal Input Design for Feed-forward Control
This paper considers optimal input design when the intended use of the
identified model is to construct a feed-forward controller based on measurable
disturbances. The objective is to find a minimum power excitation signal to be
used in system identification experiment, such that the corresponding
model-based feed-forward controller guarantees, with a given probability, that
the variance of the output signal is within given specifications. To start
with, some low order model problems are analytically solved and fundamental
properties of the optimal input signal solution are presented. The optimal
input signal contains feed-forward control and depends of the noise model and
transfer function of the system in a specific way. Next, we show how to apply
the partial correlation approach to closed loop optimal experiment design to
the general feed-forward problem. A framework for optimal input signal design
for feed-forward control is presented and numerically evaluated on a
temperature control problem
Propagation of exponential phase space singularities for Schr\"odinger equations with quadratic Hamiltonians
We study propagation of phase space singularities for the initial value
Cauchy problem for a class of Schr\"odinger equations. The Hamiltonian is the
Weyl quantization of a quadratic form whose real part is non-negative. The
equations are studied in the framework of projective Gelfand--Shilov spaces and
their distribution duals. The corresponding notion of singularities is called
the Gelfand--Shilov wave front set and means the lack of exponential decay in
open cones in phase space. Our main result shows that the propagation is
determined by the singular space of the quadratic form, just as in the
framework of the Schwartz space, where the notion of singularity is the Gabor
wave front set.Comment: 39 pages. To appear in J. Fourier Anal. App
Maurinian Truths : Essays in Honour of Anna-Sofia Maurin on her 50th Birthday
This book is in honour of Professor Anna-Sofia Maurin on her 50th birthday. It consists of eighteen essays on metaphysical issues written by Swedish and international scholars
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