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Modern communication systems are designed to enable reliable and fast information transfer. Therefore, efficient channel coding and decoding strategies are needed, which guarantee sufficiently low probability of erroneous reception with affordable receiver complexity. For many channel codes, optimal decoding with traditional methods is prohibitively complex. The challenge therefore lies in designi
Popular Abstract in Swedish I vårt vardagliga liv träffar vi på en mängd apparater som använder sig av överföring och lagring av information. Ett par exempel på sådana är CD-spelare, mobiltelefoner och datorer. I de flesta av alla dessa apparater lagras eller överförs informationen på digital form, det vill säga man använder sig av ett ändligt antal symboler för att representera informationen. EttThis thesis focuses on different convolutional coding constructions for digital communication systems, and on methods to analyze these constructions. The work presented in the thesis can be divided into three main areas; error probability bounds for convolutional codes, analysis of multilevel modulation, and investigation of low-density parity-check convolutional codes. New bounds are developed f
Introduction: Currently, patient specific dosimetric measurements on diode arrays such as Delta4® (ScandiDos AB) is a part of standard quality assurance (QA) for RapidArc® (RA) at Herlev University hospital. However, a standing issue is the interpretation of the results from dosimetric measurements into consequences in the delivered absorbed dose to the patient. Furthermore, measurements are time
The purpose with this thesis was to investigate the recovering process of former child soldiers in Northern Uganda through the perspective of professionals. Data have been collected through eleven semi-structured interviews conducted in the districts Gulu, Pader and Lira. The eleven respondents come from eight different organizations who all work with former child soldiers and their psychosocial a
Background: This exploratory, registry-based, cross-sectional study aimed to evaluate patients' health-related quality of life (HRQOL) in a subsite of oropharyngeal cancer: cancer of the base of the tongue (CBT). Methods: CBT patients, treated with curative intent, completed the EORTC QLQ-C30 and QLQ-H&N35 questionnaires 15 months after diagnosis. The HRQOL of CBT patients was compared to refe
Background: SARS-CoV-2 mRNA vaccination has been associated with both side effects and a reduction in COVID-related complaints due to the decrease in COVID-19 incidence. We aimed to investigate if individuals who received three doses of SARS-CoV-2 mRNA vaccines had a lower incidence of (a) medical complaints and (b) COVID-19-related medical complaints, both as seen in primary care, when compared t
This thesis emanates from the discursive gap between a medical discourse andexperience-driven knowledges in mental health aspects of hormonal contraceptives.The tensions and fractures between a medical discourse focusing on contraceptiveeffectiveness and largely refuting any significant adverse outcomes, and experiencebasednarratives of commonplace detrimental, or at least unwelcome and unpleasant
In 2015, following a series of sub-regional consultations, 109 states endorsed an Agenda for the Protection of Cross-Border Displaced Persons in the Context of Disasters and Climate Change. Although active in supporting the consultative process and notwithstanding their endorsement of this ‘Protection Agenda’, the European Union and its Member States promote ‘effective practices’ in the global SouIn 2015, following a series of sub-regional consultations, 109 states endorsed an Agenda for the Protection of Cross-Border Displaced Persons in the Context of Disasters and Climate Change. Although active in supporting the consultative process and notwithstanding their endorsement of this ‘Protection Agenda’, the European Union and its Member States promote ‘effective practices’ in the global Sou
Current food systems pose one of the greatest health and environmental challenges of the 21st century. Expanded utilization of seaweed for food in Western societies seems like one promising measure in the transition toward sustainable food systems. However, introducing and expanding seaweed to new markets brings certain challenges, such as limited food acceptance and availability. In this pilot co
Abstract: Gender inequality is to some extent depending on subconscious gender bias, that is, automatic associations that might mis-favour women in academia. The extent to which gender bias in relation to career choices is present in the population has been investigated during many years in an American-based web project but have not yet been investigated among teachers at LTH. In this study, we le
Synchrotron radiation sources have greatly contributed to the progress in many fields of science. The development of the storage ring technologies have made possible to obtain very low emittance electron beams, which together with the use of undulators allow to guide a very high photon flux into a very small beam size required by the experiments. Development of sources has been accompanied with eq
