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45% Power Saving in a 0.25um BiCMOS 10Gb/s 50Ohm-Terminated Packaged Active-Load Laser Driver

A 0.25mum BiCMOS laser driver based on active loads allows operation at 10Gb/s while drawing 5mA from a 1.8V supply. The design guarantees the correct matching of the driver outputs without the use of physical 50Omega load resistors. This enables a theoretical current consumption reduction of 50% (45% in the actual prototype) compared to the traditional laser-driver design.

On the origin of polymorphism - consequences of competition and predation in heterogeneous environments

In this thesis, I have studied when an initially monomorphic population can diverge into two morphs in a heterogeneous environment. Evolution is driven by competition for resources or predation. In Paper I, we studied source-sink dynamics during evolution in an environment with two types of resource of different abundance in two habitats. We found that dispersal can help maintain higher diversity

The release of terpenes during storage of biomass

During outdoor storage of large quantities of wood fuels, hydrocarbons are emitted into air in gas phase and leached out into the ground by precipitation. To investigate to what extent these emissions have environmental or health effects, sampling has been done on wood chip piles in an existing terminal storage situated in the south of Sweden, north east of Växjö. Sampling was done by solid phase

Molecules and Clusters on Oxide Surfaces

In this thesis X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, scanning tunneling microscopy,and density functional theory have been used to study the fundamental interactions between model oxidesurfaces and either organic, mixed organic/inorganic, or purely inorganic adsorbate layers. As model oxidesurfaces have served the rutile TiO2(110) surface and an in-situ grown iron oxide

Folkhälsoarbetets historia i socialmedicinsk belysning

Social medicine and public health have through history had a common and contemporary development and therefore shared common beliefs about what population health is and how it ought to be handled. It is with Industrialization that social medicine has its roots, when dramatic society changes contribu- ted to an interest towards causes in the social environment or in the political economic structure

Computationally Efficient Robust Adaptive Beamforming for Passive Sonar

Recent work has highlighted the benefits of exploiting robust Capon beamformer (RCB) techniques in passive sonar. Unfortunately, the computational requirements for computing the standard RCB weights are cubic in the number of adaptive degrees of freedom, which may be computationally prohibitive in practical situations. Here, we examine recent computationally efficient techniques for computing the