In this article the problem of explicit description of commuting functions of noncommuting elements satisfying commutation relation of the form AB = BF(A) is considered and connection to periodic points of corresponding dynamical system is established.

I vissa sammanhang är det självklart att tala om musikalisk kunskap som kunskap, men är denna kunskapssyn allenarådande? Hur ser vi på kunskap om musik i ljuset av till exempel betygssättande, Pisa-undersökningarna och antagningssystemen till musikhögskolor. I denna presentation tänkte jag presentera några olika synsätt på musikalisk kunskap som finns inom musikforskning idag.

A model to incorporate for aerodynamic 3-way (indirect) coupling between mono dispersed particles is proposed. The model is applied on particle laden jet flow and the results are compared with 2-way coupling. The particle drag coefficients are corrected based on the relative position of the particles. The correction factor is obtained from the pre-computed lookup tables. The particles are tracke

The following article reports result from an extensive study with 25 blind users from Italy and Sweden performed during the summer 2001. The tasks reported here test recognition of geometrical objects, recognition of VRML objects, mathematical surfaces and navigation in a traffic environment. The outcome of these tests show that blind users are able to handle also quite complex objects and environ

Behovet av geriatrisk och gerontologisk kompetens är stor och det är angeläget att öka antalet specialistutbildade sjuksköterskor inom vård av äldre. Sveriges befolkning blir allt äldre, vilket bland annat beror på att vi blir bättre på att främja människors hälsa och bota sjukdomar. Den ökade medellivslängden till trots, kantas ofta den sista tiden i livet av en period med ett ökat behov av vårdi

Primary and backup paths in MPLS fast reroute (FRR) may be established as shortest paths according to the administrative link costs of the IP control plane, or as explicitly calculated arbitrary paths. In both cases, the path layout can be optimized so that the maximum link utilization for a set of considered failure scenarios is minimized. In this paper, we propose a linear program for the optimi

Variability in composite manufacture and the limitations in positional accuracy of common industrial robots have hampered automation of assembly tasks within aircraft manufacturing. One way to handle geometry variations and robot compliancy is to use force control. Force control technology utilizes a sensor mounted on the robot to feedback force data to the controller system so instead of being po

This paper addresses the problem of state reduction of nonlinear continuous-time systems. A novel method that relates to balanced truncation is presented and applied to examples. The method is computationally efficient and is applicable to relatively large systems.

The common-mode (CM) signal in wireline transmission systems has proven to provide valuable information exploited for mitigating narrowband noise at the receive side. We focus on the case of broadband noise. Treating the CM signal as an additional receive signal, we investigate the capacity of the copper cable channel for different levels of coordination among the users. We introduce a channel mod