Massive MIMO has been shown to greatly improve spectral and transmit-energy efficiency. When implementing a massive MIMO system, one challenge is high hardware complexity. A solution is to reduce the number of radio frequency (RF) transceiver chains by performing antenna selection. However, a full RF switch that connects the antennas and RF chains can be highly complex and incurs significant loss

Popular Abstract in Swedish Leukemi, "det vita blodet", var ursprungligen en beskrivande diagnos på tillstånd där leukocyter (vita blodkroppar), eller snarare deras maligna, d.v.s. canceromvandlade former, tillväxte i sådan grad att de trängde undan andra blodbildande celler. I en sådan situation drabbas patienterna av blodbrist, infektioner och blödningar. Med tiden har vi lärt oss särskilja olikIn the present thesis, clinicogenetic correlations are investigated in a large population-based series of acute myeloid leukemia (AML), myelodysplastic syndromes (MDS), acute lymphoblastic leukemia, and chronic myeloid leukemia, for which the karyotypes were analyzed at the same center. The karyotypic pattern, i.e. normal karyotype or 1, 2 or ³3 anomalies, does not differ between males and female

This paper presents the results of a 4-y investigation of C-14 in different waste streams of both boiling water reactors (BWRs) and pressurized water reactors (PWRs). Due to the potential impact of C-14 on human health, minimizing waste and releases from the nuclear power industry is of considerable interest. The experimental data and conclusions may be implemented to select appropriate waste mana

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Popular Abstract in Swedish Skador med avskärning av nerver i övre extremiteten drabbar oftast unga personer. Nervskadan medför ett betydande handikapp i form av förlorad känsel och muskelkontroll i armen och/eller handen. Vid en nervskada dör de delar av nervfibrerna (axonerna) som är belägna bortom avskärningen medan nervens stödjeceller och ytterhölje finns kvar. För att återfå funktion måste nA new and simple method for the repair of nerve defects, in which sutures alone are used to guide regeneration between the nerve endings, was developed. Bilateral seven to 17 mm rat sciatic nerve defects were bridged by continuous longitudinal sutures with or without different modifications, by conventional autologous nerve grafts or direct repair under tension as controls. Evaluation was performe

The process of population ageing that has been occurring in Sweden can be expected to continue during the coming decades, the population pyramid will become increasingly rectangular, and possibly even demonstrating a shrinking base. This will lead to increasing challenges in terms of financing pensions, elderly care and healtcare. These problems will continue for at least 30 years with no demograp

Popular Abstract in Swedish Som titeln antyder behandlar avhandlingen titrerande polyelektrolyter, d.v.s. stora molekyler med många syra-basgrupper. Sådana molekyler kan vi finna lite överallt, ja till och med i våra kroppar, som innehåller en mängd olika polyelektrolyter. Deras egenskaper kan variera starkt beroende på omständigheterna och har många biologiska och industriella tillämpningar. Att Different models and statistical mechanical approximations for titrating polyelectrolytes are studied and the results compared with Monte Carlo simulations and experimental data. Three types of models have been used in the simulations: i) rigid structures and freely jointed chains with ii) rigid bonds and iii) flexible, harmonic bonds. Sampling is facilitated for the latter two by the use of pivot

This book hopes to offer an insight into the threats facing the vernacular buildings that survive in the Egyptian Western Desert. It offers a guide to those who wish to get involved in rescuing these buildings, those who re-use them and those who care for them. The first part of the book opens with an overview of the problems experienced in places that are only now becoming vulnerable to the rapid