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In this thesis, liquid-membrane-based methods for the analysis of trace metal species in samples of environmental and biological origin were developed. By incorporating extracting reagents in the membrane liquid, trace metal ions were selectively separated from humic-rich natural waters and urine samples, prior to their determination using various instrumental techniques. The extractions were perf
Fuel cells are electrochemical devices that transform chemical energy into electricity. Solid oxide fuel cells (SOFCs) are particularly interesting because they can handle the reforming of hydrocarbon fuels directly within the cell. This is possible due to their high operating temperature. The purpose of this study is to develop an anode-supported SOFC model, to enhance the understanding of the in
That a load balancing strategy using stale information care lessly will incur system performance degradation is easy to verify. However it is not so obvious that routing a customer to the expected shortest queue has the same problem when information for decision is stale. We consider a queueing system with a load balancer and a pool of identical FCFS queues in parallel. The arrival process is assu
Knowledge about the nature, processes and patterns of cascading effects, i.e. where infrastruc-ture dependencies lead to impacts propagating from one system to other systems, is essential in order to miti-gate and respond to crises that involve critical infrastructures and societal functions. This paper presents a method for systematic description of cascading effects in past event, to some extent
Thread-Level Speculation can be used to take advantage of multicore architectures for web applications. We have implemented Thread-Level Speculation in the state-of-the-art JavaScript engine V8 instead of using an interpreted JavaScript engine. We evaluate the implementation with the Chromium web browser on 15 popular web applications for 2, 4, and 8 cores. The results show that it is beneficial t
It is widely accepted that firms in peripheral regions benefit to a lesser extent from local knowledge spillovers than firms located in agglomerations or industrial clusters. This paper investigates the extent to which innovative firms in peripheral regions compensate for the lack of access to local knowledge spillovers by collaborating at other geographical scales. So far the literature predomina
Newton-Raphson and Goldschmidt algorithms can be sped up by using variable latency hardware architectures for rounding division, square root and their reciprocals. A new approach based on a rounding method with remainder estimate calculated concurrently with the algorithm was proposed in [5]. This paper presents an study of the hardware implementation of this approach and shows that does not suppo
Expression microarray analysis identified over 930 genes regulated during puberty in the mouse mammary gland. Most prominent were genes whose expression increased in parallel with pubertal development and remained high thereafter. Members of the Wnt, transforming growth factor-beta and oestrogen-signalling pathways were significantly overrepresented. Comparison to expression data from CITED1 knock
To obtain full sky coverage, astronomical adaptive optics systemsrequire Na Sodium Beacons (SBs) (also referred to as Laser Guide Starsor LGSs) located at heights extending from 85 to 100 km. When viewed atthe edge of large telescopes these SBs appear elongated. For the Euro5050 meter aperture telecopes this elongation amounts to 6 to 9 arcsecondswhen the laser is launched from a point on the tele
Kapitlet beskriver rehabiliteringsteknikens bidrag till hur vi kan tänka om äldre och teknik som främjar ett modernt äldreliv och ger exempel på hur äldres erfarenheter och behov kan vara utgångspunkten för utvecklingen av produkter och tjänster.
