We show that mid-infrared transmission spectroscopy of a quantum cascade laser provides clear-cut information on changes in charge location at different bias. Theoretical simulations of the evolution of the gain/absorption spectrum for a lambda~7.4 µm InGaAs/AlInAs/InP quantum cascade laser have been compared with the experimental findings. Transfer of electrons between the ground states in the ac

This paper uses a new and detailed survey of cigar making employers and employees to investigate two related discrimination issues. First, were piece rate cigar makers – the skilled aristocracy of this industry – paid differently by gender? We find that they were, but that the differences can be more than explained by differences in characteristics such as age and experience. Second, we ask whethe

The activity of intrastriatal grafts of nigral cell suspensions has been monitored biochemically, using radioenzymatic assays of dopamine, its major acidic metabolite, DOPAC, and DOPA accumulation after DOPA-decarboxylase inhibition. Implants of 4-9 microliter of nigral cell suspension restored striatal DA levels by an average of 13-18%, with the highest individual values reaching about 50% of con

Air traffic control is a highly spatial work. However, there are currently no three-dimensional tools used in the education of air traffic controllers or in the operational work of air traffic control. This paper presents results from some pilot studies aiming to: -Find new techniques for visualization and editing of trajectories in air traffic control. -Investigate how Virtual Reality (VR) can co

Any organisation that produces high quality software merits a closer analysis of their methods such that good techniques can be transferred to other organisations. Open Source Software projects is such a case. We make explicit their underlying process for handling change management and analyse to what extent their success can be attributed to good process, tools or people. Furthermore, we discuss

The focused crawler in ALVIS is based on the Combine system, which is an open source system for crawling Internet resources. This deliverable is the software package, the text here describes the software, packaging and distribution of the focused crawler. It provides instructions for how to download, install, test and use the Combine system for focused crawling. Evaluation of performance and scala

The present work was initiated based on an industrial demand for designing a high-bandwidth hexapod of an advanced large optical telescope. In this dissertation, we have generalized this industrial problem to fully-parametric models of the hexapod vibrations as well as analytical studies on dynamic isotropy in parallel robots, which can be directly used in any hexapod application. Hexapods (also k