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Popular Abstract in Swedish Bostäder och service svarar för hela 36 procent av Sveriges totala energianvändning, av detta står bostäder och lokaler för ungefär 86 procent. Den svenska riksdagen har antaget EU: s klimat-och energipolitiska mål som skall nås till 2020, som kallas "20-20-20"-målen. EU:s 20-20-20-mål innebär att vi ska minska klimat¬påverkan med 20 procent, uppnå 20 procent förnybar eUsing energy at low-quality levels opens up new possibilities for low-energy houses. Low-quality energy can be heat at a temperature that is close to that of its surrounding, and can be used, for example, to pre-heat ventilation air or domestic hot water. Pre-heating the incoming outdoor air reduces the need to heat ventilation and reduces the need for high-quality energy such as electricity or he

Antenna selection is a promising technique for reducing complexity of multiple-antenna (MIMO) systems. In antenna selection, more antenna elements than RF transceiver chains are available for up-conversion and down-conversion. A subset of the available antenna elements is selected and connected to the RF chains. The reduction in the number of RF chains helps to reduce the implementation cost of mu

The optical design for the proposed Euro50 extremely large telescopewith integrated adaptive optics (AO) is presented. For atmosphericturbulence correction, we propose using single and dual-conjugate AOsystems working with natural and laser guide stars. The corrective shapeof the deformable mirrors (DMs) is derived from an analytical algorithmbased on minimization of the sum of the residual power

A PID design method is presented. The work done is part of anattempt to find an automatic tuning algorithm for two times two systems inthe process industry. The method tries to minimize the impact of load disturbances. The method was mainly developed because previous designmethods with the same objectives could not handle the processesobtained in decoupled systems.

Popular Abstract in Swedish Syftet med detta arbete har varit att utveckla nya, stabila bränsleelektroder till bränsleceller baserade på fasta oxider, SOFC (solid oxide fuel cells). Vi har undersökt olika keramiska material eller kompositer med lovande egenskaper för att användas på anodsidan av bränslecellerna. För att förbättra redox-stabiliteten så ska bränsleelektroden företrädesvis inte innehThe purpose for this work has been to develop new robust fuel electrodes for solid oxide fuel cells (SOFC). The aim was to find suitable ceramic materials or composites with promising properties for the use as SOFC anodes. Preferably, the electrode should not contain any metal (or at least a metal should not be a major component) in order to improve the redox properties. The present work focuses o

A wavelet generator producing 100 ps short pulses at 60 GHz is presented. The wavelet generator consists of a gated tunnel diode (GTD) integrated in parallel with an inductor. This forms a negative differential conductance (NDC) oscillator with the ability to switch the NDC property on and off, which makes it possible to generate short pulses. In the experiments described, the wavelet generator dr

The detection of spectral line profile variability for stars of the HgMnclass of chemical peculiarity has been poorly documented in theliterature yet holds a special significance for understandingrelationships between observed spectral anomalies, stellar surfacestructure, and magnetic fields. The HgMn stars have until now not beenconfirmed to vary in their light or spectral characteristics in ways

This paper presents a solution to panoramic image stitching of two images with co- inciding optical centers, but unknown focal length and radial distortion. The algorithm operates with a minimal set of corresponding points (three) which means that it is well suited for use in any RANSAC style algorithm for simultaneous estimation of geometry and outlier rejection. Compared to a previous method for

This is the first annual report for the Swedish Butterfly Monitoring Scheme, a new national monitoring programme coordinated by Lund University for the Swedish Environmental Protection Agency. The programme was initiated in 2010, and is a partnership between the Entomological Society of Sweden, the Swedish Environmental Protection Agency, Lund University, the Swedish University of Agricultural Sci

Industrial robots are important when the degree of automation in industry is increased. To enable the use of robots also when the products change rapidly, the programming must be quick and easy to perform. One way to accomplish this is to use lead-through programming, i.e., the user manually guides the robot. This paper presents a sensorless approach, and thus avoids the need for a typically expen

Fruit trees have a vast range of water needs. When it comes to Crop Water Requirement (CWR), grapes may be considered as a low water consumption crop. Thus, grapes can be a good alternative in arid and semiarid areas as compared to dates, citrus, and bananas that have higher CWR. Much water can be saved if agricultural management focuses on high-yield crops with low CWR. Therefore, changing existi