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Existence results for the LQG-controller are investigated. An infimal Riccati equation based controller may potentially give closed loop eigenvalues on the unit circle. Assuming left and right invertibility it is shown that there exists an optimal controller if and only if the Riccati equation based controller stabilizes the closed loop system after removal of all its unobservable and uncontrollab
This paper contains a theoretically and empirically based analysis of infrastructures and co-operational patterns in a Scandinavian Internet consulting company. The purpose of the analysis originated from the hypothesis that Web-based Information Systems could especially facilitate work in distributed organisations, this as a platform for supporting collaboration, communication and co-ordination w
An ethopoeia is an imagined speech assigned to a certain character. As a rhetorical exercise it is known from the progymnasmata of Theon, Hermogenes, Aphthonius and Nicolaus as well as contemporary rhetorical theorists. The purpose of the exercise was to teach the student the appropriate use of ethos and pathos for the assigned character. The paper will present the function of the ethopoeia as a p
This thesis is based on the results concerning the epitaxial growth and characterization of silicon (Si) and germanium (Ge) nanostructures. The growth technique was the Ultra High Vacuum Chemical Vapor Deposition (UHV-CVD) that works in relatively low temperatures and low growth pressures. The UHV-CVD chamber was also used for the reduction experiments. The work presented here involves three diff
In spite of different treatment strategies today, breast cancer mortality is still high and new treatments are therefore needed. Potential new treatments can be found among the polyamine analogues. Polyamine analogues can be used in cancer treatment as cancer cells have a higher requirement for polyamines than the surrounding healthy tissue. Polyamines are flexible positive ions essential for the
The Auditors-General can have a profound impact on the work of the Supreme Audit Institution (SAI), in terms of the quality, autonomy and efficiency of audit work. In Sweden, this recruitment is prepared by the Committee on the Constitution, before the final decision is made by Parliament. The appointment is, however, shrouded in mystery and not even candidate profile requirements are openly adver
