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In this paper we investigate some properties of the union bound for a basic MIMO system, assuming uncoded QAM transmission, uncorrelated Rayleigh fading, and maximum likelihood detection. The presented union bound results cover several choices of the number of transmitting and receiving antennas (up to 16). It is also illustrated how the pair-wise error probability approaches the Q( )-function as
Abstract is not available
Popular Abstract in Swedish Hur man studerar kommunikation hos tallsteklar Totalt finns det cirka 125 beskrivna tallstekelarter i världen. De tillhör gruppen växtsteklar, och deras larver lever vanligen av tallbarr. Larvernas härjningar kan medföra att träden växer sämre eller rent av dör. Den färdiga stekeln äter inget, utan är helt inriktad på att para sig under sitt 10 –15 dagar korta liv i skPine sawflies (Hymenoptera: Diprionidae) are severe pine defoliators. This thesis investigated sawfly behaviour related to the use of pheromones in integrated pest management, including monitoring with pheromone traps and mating disruption. Neodiprion sertiferr females were placed on pine twigs in the field and 11–30 % of the females that remained on their twig after the first mating re-mated. Onl
Conflicts often lead to expression of emotion to unrelated parties. We study non-instrumental emotion expression in binary ultimatum games, where receivers can express emotion either privately or to a third-party audience prior to accepting or rejecting the offer. The possibility of emotion expression to an audience increases welfare, but this is driven by senders behaving more fairly rather than
Background: To assess balance in single-limb stance, center of pressure movements can be registered by stabilometry with force platforms. This can be used for evaluation of injuries to the lower extremities. It is important to ensure that the assessment tools we use in the clinical setting and in research have minimal measurement error. Previous studies have shown that the ability to maintain stan
A study on the noise generated by a subsonic four bladed propeller installed on a wing of an aircraft near the ground is presented. The method used is based on an acoustical analogy developed by Ffowcs Williams and Hawkings. Computations of the flow field are performed using LES with the incompressible fluid assumption, while the noise is evaluated using a non-homogeneous wave equation. The aim is
Popular Abstract in Swedish Melanin är ett pigment som finns i många olika slags vävnader. I hud och hår finns två slags melanin, pheomelanin som är typiskt för rödhåriga personer och eumelanin som finns i större mängd i mörkt hår och hud. Konstaterad korrelation mellan hudcancer och solexponering motiverar forskarna att förstå mer om melanin och dess växelverkan med UV-ljus. Man vet att rödhårigaMelanin is an epidermal pigment commonly known to give darker skin coloration under sun exposure. It is also present in the hair, eyes, inner ear and brain. The first function of epidermis melanin is believed to be photoprotective against harmful ultraviolet (UV) light, but the recent increase of skin cancer correlated to an increase of sun exposure questions the properties of melanin. Its presenc
In the ancient corpus of Aesopic fables gods and semi-gods from Greek and Roman mythology often appear. Most commonly Zeus is called upon by fable characters such as the donkey, the snake, and the turtle, all of them pleading for a better destiny. Frequent main characters, rather often promoting their own interests in the fable fictions, are also Hera, Herakles, Apollo, and Hermes. The high esteem
Popular Abstract in Swedish I de flesta fall börjar knäledsförslitning i den inre ledkammaren (medial gonartros) och medför en successiv hjulbenthet (varus). I enstaka fall börjar förslitningen i den yttre ledkammaren (lateral gonartros) innebärande kobenthet (valgus). Personer över 60-65 år behandlas kirurgiskt oftast med knäledsprotes med bra resultat. Hos yngre, mer aktiva, är denna metod sämreOsteotomy is used for correction of the altered load on the gonarthrotic knee joint. It can be performed above or below the knee. Clinical results depend on the correction after bone healing. By tibial closed wedge osteotomy (HTO), the deformity is corrected peroperatively in contrast to tibial hemicallotasis osteotomy (HCO) where the correction is performed after surgery. Comparing the two method
This book is the first in almost 40 years to provide a comprehensive scientific overview of research in the field of parapsychology, explaining what we know and don’t know about so-called psi phenomena, such as “telepathy,” “precognition” or “psychokinesis.” Contributors evaluate the evidence for these phenomena, accounting for factors such as selective memory, wish fulfillment and incorrect metho
Popular Abstract in Swedish Det finns många skäl till varför streptomyceter är en intressant grupp av bakterier att undersöka. Den här avhandlingen fokuserar på celldifferentieringen hos dessa organismer och deras förmåga att bilda en specialiserad typ av tåliga celler som kallas sporer. Genom att studera sporuleringsprocessen hos dessa bakterier kan man lära sig mycket om fundamentala livsprocessStreptomycetes are Gram-positive bacteria with a complex developmental life cycle. They form spores on specialized cells called aerial hyphae, and this sporulation involves alterations in growth, morphogenesis and cell cycle processes like cell division and chromosome segregation. Understanding the developmental mechanisms that streptomycetes have evolved for regulating for example cell division i
