British strategy in the Middle East consolidated around a sustained effort to prevent any adversarial penetration into the Persian Gulf, defending its position athwart the principal lines of communication and supply between Northern Europe and British India, and to protect the newly discovered Persian oil that was used to power the Royal Navy. Since the discovery of oil in 1908 by D’Arcy’s oil exp

How human exposure levels of air pollutants are related to health status is an issue of great importance for e.g. infrastructural and urban planning. This study analysed the exposure levels of NO2 for individuals depending on their country of birth. The study was conducted within three different study areas of varying characteristics and extent to decide whether any such associations existed and i

In this paper a modification of a recently proposed model simplification method for linear time invariant parameterized models is presented. It is able to obtain models with explicit parameter dependence. The method is based on convex optimization with semidefinite constraints. Computation of the reduced model requires only the frequency samples of the full one, hence it is possible to apply the m

This paper presents a decomposition strategy applicable to DAE constrained optimization problems. A common solution method for such problems is to apply a direct transcription method and to solve the resulting non-linear program using an interior point algorithm, where the time to solve the linearized KKT system at each iteration is dominating the total solution time. In the proposed method, the s

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

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This paper provides observations and commentary on how bioenergy was presented and communicated at the 15th Conference of the Parties (COP 15) held in Denmark in December 2009, including the main conference and side events as well as “unofficial” parallel events and activities. We can learn significantly from the experiences of COP 15 in regards to how to develop and present visions for bioenergy,

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