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Aims: CT acquisition parameters and reconstruction techniques may affect the accuracy of calcium scoring measurements with a potential impact on clinical decision making. We evaluated the agreement of half- versus standard-dose protocols for assessment of aortic valve (AVCS HD and AVCS SD protocols) and coronary artery calcium scoring (CACS HD and CACS SD protocols) with and without the applicatio
Atmospheric inverse modelling and ecosystem data assimilation are two complementary approaches to estimate CH4 emissions. The inverse approach infers emission estimates from observed atmospheric CH4 mixing ratio, which provide robust large scale constraints on total methane emissions, but with poor spatial and process resolution. On the other hand, in the ecosystem data assimilation approach, the
När biometriska metoder används för autentisering är det viktigt både att processen är korrekt, och går snabbt. Givetvis ska en obehörig användare inte kunna passera autentiseringsprocessen, och givetvis är det fördelaktigt om autentiseringen inte tar lång tid. Vid biometrisk fingeravtrycksigenkänning finns flertalet faktorer som försvårar matchningen. Brist på ljus kan göra fingeravtrycksbilden fThis thesis investigated the use of convolutional neural networks (CNNs) for image restoration of fingerprint images, focusing on the reconstruction from raw sensor images to denoised fingerprint images, suitable for matching. Fingerprint images from sensors often introduce noise and artifacts that inhibit the matching process. The goal was to develop a CNN-based approach capable of removing artif
The Pasur River is a vital reservoir of surface water in the Sundarbon area in Bangladesh. Mongla seaport is located on the bank of this river. Many industries and other commercial sectors situated in this port area are discharging waste into the river without proper treatment. For this reason, geospatial analysis and mapping of water pollutant distribution were performed to assess the physicochem
Metal halide perovskites have garnered significant attention for their remarkable optoelectronic properties and unique photophysical characteristics. Combined with low cost for fabrication, this new class of materials is among the most promising candidates within next generation photovoltaic technologies. However, the complex nature of metal halide perovskites' crystal structures and compositions
In the Southern Gas Basin (SGB) of the North Sea there are many mature gas fields where time-lapse monitoring could be very beneficial in extending production life. However, the conditions are not immediately attractive for time-lapse seismic assessment. This is primarily because the main production effect to be assessed is a pore pressure reduction and frame stiffening because of gas production i
The main goal of SASPENCE is to develop and evaluate an innovative system able to perform the Safe Speed and Safe Distance concept, that means to help the driver in avoiding accident situations related to excessive speed or too small headway. So, the system should co-operate seamlessly with the driver, suggesting the proper velocity for the given condition (road structure, traffic situation, etc.)
Popular Abstract in Swedish Växters artdiversitet i naturbetesmarker.Effekter av landskapsstruktur och habitathistoria. I min avhandling har jag undersökt växters artdiversitet i fragmenterade naturbetesmarker, av olika ålder och med olika historisk markanvändning. Jag har även undersökt betydelsen av habitatens isolerinsgrad i dagens och i det förflutna landskapet för dagens artdiversitet med häThe thesis examines the impact of present and past landscape structure, habitat history and management on different aspects of present-day plant species diversity in fragmented semi-natural grasslands in Sweden and in Estonia. Species diversity was significantly associated with present and/or past grassland connectivity in the majority of the studies in the thesis. However, relationships between d
My dissertation studies the frequently mentioned but never fully explored affinities between the writings of Juan Carlos Onetti and Juan José Saer. From the very beginning of their writing careers, both authors relate writing and narrating to an elusive search for meaning—in life and stories. Consequently, the scene of storytelling is of the utmost importance; how, when, by and to whom, and indeed
The aim of this thesis is to study and analyze from an archivists point of view how the function of the municipal archives relates to the aspects of the professional position and, work situation and education of those who work in archives, and to the laws and regulations. Our discussion is framed by the notions of democracy and transparency and their significance for archival practices in a munici
Emotion dysregulation and psychological inflexibility are widely regarded as key contributors to a range of mental health issues and are integral to several treatment models in the mental health field. However, no study has examined whether the two constructs reflect distinct aspects of psychological functioning or whether they can be clearly differentiated from mental health symptoms and associat
The purpose of this study was to evaluate 10 process-based terrestrial biosphere models that were used for the IPCC fifth Assessment Report. The simulated gross primary productivity (GPP) is compared with flux-tower-based estimates by Jung etal. [Journal of Geophysical Research 116 (2011) G00J07] (JU11). The net primary productivity (NPP) apparent sensitivity to climate variability and atmospheric
The increase of the consumer electronics market the last couple of decades has been one of the main drivers of IC process technology development. The majority of the ICs are used in digital applications, and for these CMOS is the choice of technology. The urge to squeeze more transistors on to a given area has led to shrinking feature sizes. It has resulted in higher transition frequencies and red
Popular Abstract in Swedish Två av de viktigaste polyaminerna påträffades redan i slutet av 1600-talet, som kristaller i tjursperma och har därför fått namnen spermin och spermidin. Dessa aminer bildas från en annan substans, putrescin, som först isolerades från ruttnande kött. Namnet putrescin kommer från engelskans putrefaction, som betyder förruttnelse. Polyaminer, som kemiskt sett är positivt The polyamines putrescine, spermidine and spermine are essential for cell growth and differentiation. The biosynthesis of polyamines are tightly regulated by feedback mechanisms involving two enzymes, namely ornithine decarboxylase (ODC) and S-adenosylmethionine decarboxylase (AdoMetDC). This thesis deals with the mechanisms behind the polyamine-mediated feedback control of these enzymes. The poly
Polymer dispersions are employed in a wide variety of applications as film formers. Especially in the coating-, paint-, pharmaceutical and hygiene industry polymer dispersions are to a large extent used as barriers, controlled-release agents and adhesives. Control and steering of the polymerization process has resulted in the production of core-shell structures with soft and hard (low glass transi
To elucidate the molecular requirements for cancer cell internalization of the extracellular cysteine protease inhibitor cystatin C, 12 variants of the protein were produced and used for uptake experiments in MCF-7 cells. Variants with alterations in the cysteine cathepsin binding region ((Δ1-10)-, K5A-, R8G-, (R8G,L9G,V10G)-, (R8G,L9G,V10G, W106G)-, and W106G-cystatin C) were internalized to a ve
This study of maxillary sinus reconstruction in conjunction with insertion of endosseous implants included 99 patients. Two separate surgical methods were applied; a one-staged strategy (n=49) and a two-staged strategy (n=50). The aims were to compare two different strategies concerning implant and prosthetic construction survival. Differences in positioning and angulation of the inserted implants
Popular Abstract in Swedish Framväxten av affärssystem under 1990 talet är en av de mest betydelsefulla utvecklingarna inom verksamhetsstödjande informationssystem. Affärssystem karaktäriseras av omfattande branschtäckning, stor funktionalitet, generisk lösning, processorientering, integrerad lösning och centralt dataformat, som tillsammans gör affärssystem kanske till den hittills mest komplexa o
This paper presents an investigation of the radiative heat transfer process in two fixed bed furnaces firing biomass fuels and the performance of several widely used models for calculation of radiative heat transfer in the free-room of fixed bed furnaces. The simple optically thin (OT) model, the spherical harmonic P-1-approximation model, the grey gas model based on finite volume discretization (
