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Interleaver structures for turbo codes with reduced storage memory requirement

This paper describes two interleaver structures that reduce the memory requirement for the storage of interleaver rules. The first structure offers memory reductions of more than 50%, compared to storing the entire interleaver vector. The second structure is useful when a range of interleaver sizes are to be stored, offering memory reductions asymptotically approaching 50%. By combining the two st

Determination of cyclic organic acid anhydrides in air using gas chromatography .2. Sampling and determination of hexahydrophthalic anhydride, methylhexahydrophthalic anhydride, tetrahydrophthalic anhydride and octenylsuccinic anhydride

Methods for sampling and determination of four organic acid anhydrides are described. The methods were validated in a standard atmosphere and in the work environment. Hexahydrophthalic anhydride (HHPA), methylhexahydrophthalic anhydride (MHHPA), tetrahydrophthalic anhydride (THPA) and octenylsuccinic anhydride (OSA) were sampled using Tenax and Amberlite XAD-2 solid sorbents and determined by GC w

Skolkulturer (talbok)

I denna bok rapporteras resultat från sju forskningsprojekt inom forskningsprogrammet Skolkultur en framgångsfaktor? Forskarna kommer från olika vetenskapliga discipliner: etnologi, företagsekonomi, pedagogik, socialantropologi, sociologi och statsvetenskap. Förankrade i olika perspektiv och teoritraditioner och med hjälp av olika metoder undersöker de skolan. Resultatet är en bred och varierad be

Aphrodite - The Making of a Goddess

Aphrodite is the divine image in Western civilization of love and fertility. She is the eternal beauty of classical Greece - but she has a wide-ranging history. On the one hand giver of wealth and abundance - on the other linked with violence and war. Aphrodite appeared on Cyprus during the Bronze Age. Protectress of copper, her cult spread all over Europe. In Scandinavia she was called Nerthus. B

Assessment of Biogas Production from Source Separated. Fat, Oil and Grease (FOG) from Households

Waste in form of fat, oil and grease (FOG) is generated where food is prepared or consumed, e.g. in households. If collected properly, the household FOG could be interesting for biogas production. This fraction has been source-separated and collected separately in a residential area in Malmö, Sweden. The biogas potential has been evaluated by mesophilic digestion experiments. Both single-substrate

Uthålliga VA-system - internationella erfarenheter av organisationsformer och drivkrafter i en VA-sektor i utveckling

The report describes and analysis the water and sewerage system in five European countries from a resource based view I denna rapport intresserar vi oss för begreppet ’uthållighet’ (sustainability) inom ramen för vatten- och avloppsverksamheter. Utgångspunkten är emellertid varken teknisk eller ekologisk utan denna studie görs utifrån ett strategi- och organisationsperspektiv. Ambitionen är att t

Catalytic combustion in environmental protection and energy production

Catalytic combustion is an important area of catalysis and is used in energy production as well as in the abatement of harmful emissions of various types. This thesis is focused on three different areas of catalytic combustion: - Catalytic combustion of diesel soot - Development of catalytically active wire meshes through thermal spraying - Stabilisation and activation of g-alumina for methane com

Reacting Boundary Layers in Homogeneous Charge Compression Ignition (HCCI) Engine

An experimental and computational study of the nearwall combustion in a Homogeneous Charge Compression Ignition (HCCI) engine has been conducted by applying laser based diagnostic techniques in combination with numerical modeling. Our major intent was to characterize the combustion in the velocity- and thermal boundary layers. The progress of the combustion was studied by using fuel tracer LIF, th

Excited State Processes in Solar Energy Materials

Popular Abstract in Swedish Den globala energianvändningen är idag större än någonsin. Faktum är att den, i takt med världens ständiga utveckling, kommer att fortsätta öka många år framöver. Sättet som energi har producerats på historiskt används dessutom i allra högsta grad fortfarande idag och innebär daglig förbränning av stora mängder organiskt material. Detta resulterar i en ökad koncentratioThis dissertation covers studies of excited state processes in two types of solar energy materials: alternating polyfluorene polymers and their blends with fullerenes in the active layer of plastic solar cells, and bis-tridentate RuII-polypyridyl complexes to be used as sensitizer in systems for artificial photosynthesis. The polymer:fullerene blends were studied by transient absorption and time-