Feedback stabilization of an ensemble of non interacting half spins described by Bloch equations is considered. This system may be seen as a prototype for infinite dimensional systems with continuous spectrum. We propose an explicit feedback law that stabilizes asymptotically the system around a uniform state of spin +1/2 or -1/2. The proof of the convergence is done locally around the equilibr...

Fuzzy Cognitive Maps (FCMs) have found many applications in social -financial -political problems. In this paper we propose a method of FCM operation, which can be used to represent and control any real system, including traditional electro-mechanical systems. In the proposed approach the FCM reaches its equilibrium point using direct feedback from the node values of the real system and the lim...

A bottleneck situation in one-lane traffic flow is typically modelled with a constant demand of entering cars. However, in practice this demand may depend on the density of cars in the bottleneck. The present paper studies a simple bimodal realization of this mechanism to which we refer to as density-feedback control (DFC): If the actual density in the bottleneck is above a certain threshold, t...

This paper presents a positive model which shows that institutional setups on capital and labor markets might be intertwined by politicoeconomic forces. Some countries especially in continental Europe exhibit a corporatist politicoeconomic equilibrium with a substantial protection of insiders on both markets. The more important money is in political decision-making, the more divided the workfor...

Research finds that minorities and women often face unique challenges as faculty members, such as lower senses of fit in their departments, greater feelings of isolation, fewer opportunities for collaboration, more trouble finding quality mentors, and bias from colleagues and students. Moreover, women and minorities are more likely to be overburdened with service, which often is not highly rewa...

This paper analyses a two-sidedmarket in which two platforms compete against each other. One side, the advertisers, exerts a negative externality on the other side, the users. It is shown that if platforms can charge advertisers only, a higher degree of competition for users can lead to higher profits because competition on the advertisers’ side is reduced. If platforms can charge users as well...

[1] Shallow coastal lagoons are environments where a dynamic equilibrium exists between water quality and seagrass cover. Dense seagrass canopies limit the resuspension of bed sediments thereby creating a clearer water column and a positive feedback for seagrass growth. Positive feedbacks are often associated with the existence of bistable dynamics in ecosystems. For example, a bare and a seagr...

Decision making for natural resource management, such as forest management, park management, and marine habitat management, requires complex and science-intensive balancing acts that weigh human and environmental considerations. These management decisions are characterized by both the potential for substantial gains and the risk of negative environmental consequences. Despite the inherent uncer...

Brain Drain in Globalization: A General Equilibrium Analysis from the Sending Countries’ Perspective The paper assesses the global effects of brain drain on developing economies and quantifies the relative sizes of various static and dynamic impacts. By constructing a unified generic framework characterized by overlapping-generations dynamics and calibrated to real data, this study incorporates...

This paper proposes a new scheme parallel control scheme with feedback control (PCFC) for ABR services in ATM networks. The information from a source is split into a number of streams for delivery over separate parallel connections. At the receiver, the original information is reconstructed using the cells received from the parallel connections. Traffic splitting of PCFC achieves two advantages...