We overview two approaches to the analysis of low-density parity-check (LDPC) codes: selected code approach and ensemble approach. As examples of application of the methods we consider Gallager's homogeneous LDPC codes and Berrou-Glavieux-Thitimajshima (BGT) turbo-codes

Popular Abstract in Swedish Långlivade klororganiska miljögifter (POP) som polyklorerade bifenyler (PCB), dioxiner och och insektsgiftet diklordifenyltrikloretan (DDT) har sedan decennier funnits i vår miljö. PCB framställdes genom klorering av bifenyl och det finns 209 olika varianter. En av dessa är CB-153, vilken är den vanligast förkommande PCB varianten, och vi har använt denna som biomarkör Persistent organochlorine pollutants (POPs), such as polychlorinated biphenyls (PCB) and the insecticide dichloro-diphenyl-dichloro-ethylene (DDT) have been released into the environment mainly since the second World War. POPs accumulate especially in highly ranked predators of the aquatic food chain. In Sweden, the major exposure route for POPs are through consumtion of fatty fish, such as salmon

A new method for characterization of simultaneous intra-atrial and ECG recordings during atrial fibrillation (AF) is presented. With different preprocessing, both types of signals are characterized using a logarithmic time-frequency distribution from which trends of frequency, regularity, morphology (only ECG) and signal quality are extracted. The objective of the study is to relate ECG measures o

Voltage collapse was one of the main causes for many recent blackouts. The direct link between voltage stability and reactive power balance in the system leads to more attention toward reactive power resources in the power systems. Shunt reactors and capacitors are used to balance reactive power in the power systems. The strategy to control them in both normal and emergency conditions is an import

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

Popular Abstract in Swedish När ett barn föds före graviditetsvecka 30 är andningsinsufficiens eller på engelska kallad respiratory distress syndrome (RDS) ett av de stora kliniska problemen som barnläkaren står inför. Redan på 1920-talet förstod man att det måste finnas ett ytspänningsnedsättande ämne i lungorna och på 1950-talet fann man att för tidigt födda (prematura) barn med RDS hade brist pUsing an animal model, the thesis explores how the initial ventilation of the lungs, and surfactant therapy, should best be managed after premature birth. Material and measurements: The studies were made in newborn lambs delivered by cesarean section. Spread of exogenous surfactant was analysed by mixing it with technetium-labelled macroaggregated human serum albumin and imaging the radioactivity

Detta är den tredje och avslutande delen i trilogin "Slaveri - en världshistoria om ofrihet". I centrum för volymen står kampen mot slaveri, en kamp som inleddes i slutet av 1700-talet och kulminerade hundra år senare - men som ännu inte är avslutad. Efter ett inledande kapitel om de första abolitionisterna följer en beskrivning av utvecklingen i Västindien, Latinamerika och USA. I USA växte värld

In recent years, we have seen the development of a more relational approach to territoriality. This perspective, which focuses on events rather than space, also opens up for an elaboration of temporal aspects of territorial production. In this study, I investigate the central urban square, Stortorget, in Malmö, Sweden, in order to develop a discussion of urban time-space territorology. In 1978, Ko