Filetype
The thesis concerns modeling, simulation and numerical analysis of heat and mass transport, and fluid flow in ducts of both solid oxide fuel cells (SOFCs) and proton exchange membrane fuel cells (PEMFCs). The unique fuel cell boundary conditions (thermal, mass) for the flow ducts in fuel cells are identified and applied. Various duct configurations have been studied, such as rectangular and trapez
Popular Abstract in Swedish Vad har den slaviskt inspirerade östersjökeramiken som arkeologer finner i Skandinavien med slaver att göra? Levde de som gäster i huset? Vikingen och hanseaten har sedan länge sina platser inbokade på den historiska scenen. Under äldre medeltid rörde sig även andra aktörer över Östersjöns vatten. Främmande gäster besökte och bosatte sig i Skandinavien. Bland dem fanns Scholarly texts on Slavic-Scandinavian relations have concentrated on two main areas of interest. During the Viking Age the economic and social contacts between the lake Mälaren district and Rus’ were extensive. However, at the beginning of the Middle Ages, political antagonism between the two expanding realms of the Svear and the Novgorodians is noticeable. In southern Scandinavia, the hostility
The monosaccharide anhydrides (MAs) levoglucosan, galactosan and mannosan are products of incomplete combustion and pyrolysis of cellulose and hemicelluloses, and are found to be major constituents of biomass burning (BB) aerosol particles. Hence, ambient aerosol particle concentrations of levoglucosan are commonly used to study the influence of residential wood burning, agricultural waste burning
Cell fate reprogramming towards pluripotency or alternative somatic cell-types has highlighted the plasticity of adult somatic cells, providing new technologies to generate desired cell types for tissue repair or for disease modeling. There is momentum to bring these concepts to immunology by specifying unique immune cellular identities that set in motion immune responses. Dendritic cells (DCs) ar
BackgroundSevere perineal trauma (SPT) affecting the anal sphincter muscle complex is a serious complication following childbirth, associated with short-term and long-term maternal morbidity. Effective preventive strategies are still scarce. The aim of the Oneplus trial was to test the hypothesis that the presence of a second midwife during the second stage of labour, with the purpose of preventin
Using Small-Angle Neutron Scattering (SANS) we have studied the flux line lattices of the first heavy-fermion superconductor to be discovered, CeCu2Si2, the well-known high-temperature superconductor YBa2Cu3O7, along with Ca-doped variants of this compound, and several topological superconductor candidates that have attracted a lot of attention in the last few years, such as PbTaSe2, Au2Pb and β-B
Hand amputation results in the loss of motor and sensory functions, impacting activities of daily life and quality of life. Commercially available prosthetic hands restore the motor function but lack sensory feedback, which is crucial to receive information about the prosthesis state in real-time when interacting with the external environment. As a supplement to the missing sensory feedback, the a
The majority of the world’s peatlands are located in northern regions where climate change is occurring most rapidly. Therefore, there is an urgent need to understand whether, and under what conditions, peatlands will remain carbon sinks or become carbon sources. The uncertainties in our predictions stem from a variety of sources, including uncertainty about the competing effects of rising air tem
In the production of pulp and paper, water-soluble components, such as hemicellulose, monosaccharides, and lignin, are released and accumulate in the process water. The process water is usually concentrated and incinerated for heat generation and the recovery of pulping chemicals, such as in the Kraft and sulfite processes. The growing trend toward a more sustainable forest industry has increased
The sun is the most important energy source for the Earth’s climate system, however, influences of solar variations on climate are not fully understood. Studying past solar activity can improve our understanding of what role the sun plays in Earth’s climate. Cosmogenic radionuclides, such as 10Be in ice cores, are powerful tools to reconstruct past solar activity before the period of direct telesc
There is increasing evidence that fermentation in the large intestine is important for health, and that health-promoting effects are mediated by fermentation products such as butyric and propionic acid. As the formation of carboxylic acids (CAs) from various carbohydrates reaching the colon has been shown to vary, it is of great interest to identify food factors that could be of importance to this
Popular Abstract in Swedish I mitt doktorandprojekt har jag studerat den fästingspridda bakterien Borrelia och dess värddjur skogssork. Det övergripande syftet har varit att kartlägga den genetiska variationen i den delen av immunförsvaret som tar hand om bakterieinfektioner, som till exempel borrelia. I alla ryggradsdjur finns ett specifikt immunförsvar som kan identifiera små proteinbitar från eThe major histocompatibility complex (MHC) class IIB genes exhibit extensive allelic polymorphism, most likely maintained by pathogen-mediated balancing selection (PMBS). PMBS may operate in the form of heterozygote advantage (HA), and/or through the interaction of pathogens and specific MHC alleles via fluctuating selection (FS) or negative frequency-dependent selection (NFDS). In particular, NFD
Popular Abstract in Swedish Deponier (soptippar) har förändrats kraftigt de senaste decennierna. Detta beror främst på ändrad lagstiftning vilken i sin tur till stor del bygger på en önskan att skydda miljön. Dock har lag¬stiftningen implementerats utan riktig kännedom om dess konsekvenser för utsläppen från deponier på lång sikt. För att öka förståelsen för konsekvenserna genomfördes det forskninWaste management in Europe has changed, mainly as a result of stricter regulations, most notably the European Landfill Directive 1999/31/EC. In Sweden, landfill tax and a ban on the landfilling of waste with total organic carbon content over 10 % have diverted large amounts of waste from landfills. The biogeochemistry of landfills has changed due to their reduced organic content. The research pres
In Sweden, the tramway was introduced in the late 19th century as horse tramways. Entrepreneurs around the country saw advantages of the new mean of transport which, due to low frictional resistance could transport a large amount of passengers with low traction force. In the beginning of the 20th century the horses were replaced by electric motors and the tramway spread to more cities. The entry o
This Master’s thesis is performed on behalf of Alfa Laval, a multinational company providing technological products and services.
Alfa Laval has in the past had a lot of successful mergers, but there were also those cases that led to sell off and those that had potential to add more value than was actually realized. In the common case, it has been shown that 60-70 per cent of M&As fall sho
Uppsatsen undersöker EU-medlemsstaternas skyldigheter i samband med klassificering av särskilda skydds- och bevarandeområden enligt fågelskydds- respektive habitatdirektivet. Direktivens främsta mål är att skapa ett sammanhängande ekologiskt nätverk, Natura 2000. Uppsatsen har visat att medlemsstaterna endast får beakta ornitologiska kriterier när de föreslår områden som ska beredas skydd enligt fThis paper examines the EU Member States’ obligations in connection with the designation of special protection areas and special areas of conservation under the Wild Birds- and the Habitats Directive. The primary objective of the directives is to create a coherent ecological network of protected areas, Natura 2000. The paper demonstrates that Member States may consider only ornithological criteria
Hjärtstopp inträffar när hjärtat plötsligt slutar slå och är ett livshotande tillstånd. Av personer som drabbas av hjärtstopp utanför sjukhus överlever endast en av tio fram till utskrivning från sjukhuset. Hjärnan har en hög ämnesomsättning och små energidepåer. Därför är hjärnan extra känslig för effekterna av ett hjärtstopp. När hjärtat slutar slå och blodet inte kan cirkulera i kroppen riskeraBackground: The brain is susceptible to hypoxic-ischemic brain injury in conjuction with out-of-hospital cardiac arrest (OHCA). Cognitive impairments are documented in about half of all OHCA survivors, however with a pronounced heterogeneity in measurements and findings. More detailed studies and instruments that are sensitive to OHCA-related cognitive impairment, including predictive models to id
Land-use change is one of the greatest threats to biodiversity. Through intensification of land-use, the agricultural landscape has become more homogenous and a result, many species associated with traditional farmland or other semi-natural open habitats have declined. To be able to improve biodiversity conservation we need to be able to track components of biodiversity and understand how they res
Primary debulking surgery (PDS) followed by platinum-based postoperative chemotherapy isthe standard of care for advanced ovarian cancer (AOC). Absence of macroscopic residualdisease after debulking surgery is the strongest prognostic factor achieved by surgery. Correctcharacterization of the tumor specimen and tumor spread in combination with patient’scharacteristics such as age, comorbidity, and
