The paper deals with the use of visual stereotypes in virtual pedagogical agents and its potential impact in digital learning environments. An analysis of the concept of visual stereotypes is followed by a discussion of affordances and drawbacks as to their use in the context of traditional media. Next, the paper explores whether virtual pedagogical characters introduce anything novel with regard

Packaging logistics is fundamental to the success of retail supply chains. Implementing systemwide change in this field is however complex. This paper introduces packaging logistics in retail supply chains and compares and contrasts the change processes in the introduction of plastic trays to retail food systems in the UK and Sweden.

This article examines the introduction of the Balanced Scorecard (BSC) among municipalities in Sweden from a diffusion perspective. The point of departure in the article is that there is a gap in our understanding concerning the diffusion of new management accounting constructs. Over the last decade, research has largely been based on empirical evidence regarding early adopters. Furthermore, these

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The switches and the control circuit of Buck converter with static feedback control have been implemented in a standard digital 0.6 μm CMOS process. The control used is a direct large-signal approach, and the converter has been proven to be globally asymptotically stable using the theory of successors in combination with Lyapunov's direct method. One very important design parameter is the output r

Fading of the wideband radio channel and its implications for CDMA RAKE receiver operation has been investigated using measured wideband impulse responses and simulations with an exponentially shaped channel model. The emphasis has been on systems with 1.25 MHz and 5 MHz bandwidth, and the reduction in fading variations as well as the increased complexity in terms of required RAKE correlator branc

In this paper a distributed version of the Kalman filter is proposed. In particular, the estimation problem is reduced to the optimization of a cost function that depends on the system dynamics and the latest output measurements and state estimates which is distributed among the agents by means of dual decomposition. The techniques presented in the paper are applied to estimate the position of mob

Syftet med detta utkast är att identifiera och analysera de sociala relationer och motsättningar som uppstår i ett samhälle som förändrats helt under ett krig. Den empiriska delen bygger på observationer i Ljubija, en stad i nordvästra Bosnien, tidningsartiklar från området samt fjorton intervjuer. Utvecklingen under och efter kriget har gjort att folk i Ljubija grupperas i tre skikt. En grupp b

The nonlinear kinetic equation of Prigogine and Herman is examined in regards to existence and uniqueness of solutions. The solution exists and is unique in the Banach space of bounded continuous functions over a particular subspace Ω. The equilibrium solution of the kinetic equation of Prigogine and Herman is used to derive asymptotic type series expansions in the form of Hilbert or Chapman and