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Co-digestion of food waste and green waste was conducted with six feedstock mixing ratios to evaluate biogas production. Increasing the food waste percentage in the feedstock resulted in an increased methane yield, while shorter retention time was achieved by increasing the green waste percentage. Food waste/green waste ratio of 40:60 was determined as preferred ratio for optimal biogas production
Traceability of dairy products is an important issue for the dairy industry. Empirical studies have demonstrated the utility of stable isotope measurements on milk for verification of origin. However, various drivers influence the isotopic composition of a food stuff, such as rainfall levels or food supplements. Relationships between the isotopic composition (δ2H, δ18O, δ13C and δ15N) of milk fatt
Objective. Serum osteocalcin (S-OC) is widely used as an index of bone formation. However, there is evidence that some urinary fragments of OC reflect resorption and might be useful in monitoring antiresorptive therapy. Here, we report 6-month changes in urinary midfragments of osteocalcin (U-MidOC) and other bone turnover markers in response to risedronate treatment. Material and methods. The stu
A consensus protocol for treatment of distal radius fractures (DRF) has been developed to aid clinicians in treatment decision making. The protocol was evaluated in Paper I using a validated subjective outcome instrument, DASH in 518 consecutive patients. A good final subjective result was achieved with the proposed protocol, regardless of initial severity with a low median DASH score in all group
Maternal smoking during pregnancy has been reported to negatively impact sperm counts of the sons. Sufficient data on the effect of paternal smoking is lacking.
Laminar burning velocities of four biomass derived gases have been measured at atmospheric pressure over a range of equivalence ratios and hydrogen contents, using the heat flux method on a perforated flat flame burner. The studied gas mixtures include an air-blown gasification gas from an industrial gasification plant, a model gasification gas studied in the literature, and an upgraded landfill g
Heavy metal pollution is a worldwide crisis that threatens thousands of species and ecosystems. Within the next couple of decades, the majority of the global population is predicted to live in urban areas which will likely cause the pollution crisis to become even worse if preventive actions aren’t executed now. Hence, proper implementation of urban green spaces and infrastructure is imperative to
Magnesium alloys are promising candidates for biomedical implants due to their ability to dissolve in the human body, which improves the surgical procedures making a secondary surgery to remove the implant unnecessary. However, one of the main challenges magnesium alloys faces in terms of an implant is their inferior strength compared to such permanent implant materials as stainless steel and tita
This thesis compares portrayals of Syrian and Ukrainian refugees in Swedish main stream media in 2015 and 2022, through a mixed methods approach employing frame analysis and Critical Discourse Analysis. By examining how these two groups are represented, the study reveals quantitative and qualitative patterns of differential portrayals demonstrating a moral exclusion of Syrian refugees. Viewed thro
This thesis work is an academic study investigating how to transform and re-purpose the abandoned hydroelectric powerplant, Hästbergadammen. The powerplant has been abandoned since the dam collapsed in 2010, and the case of rebuilding it has been in the Land and Environment Court since 2016. The thesis proposes a new purpose for the site. It suggests giving back a public monumental place where t
Background – As E.ON’s solar panel business has grown significantly, they are interested in finding new methods of working with inventory management. Currently, it is controlled manually and without any support of structured analytical inventory control methods. Purpose – The purpose of this Master’s Thesis Project is to investigate and suggest a method suitable for inventory control of E.ON’s so
Simethicone, a widely used anti-foaming agent in pharmaceuticals, consists mainly of polydimethylsiloxane (PDMS) combined with silica gel. While it is safe in pharmaceutical use, concerns have been raised about its degradation into cyclic siloxanes—specifically D4, D5, and D6—which can cause environmental and health hazards. This study investigated the degradation behavior of simethicone under var
This thesis investigates the factors driving Bitcoin’s volatility over the period 2019 to 2025. A period marked by heightened economic uncertainty, including both the Covid-19 pandemic and the Trump election period. Utilizing GARCH-X (1,1) and EGARCH-X (1,1) models, the paper finds five statistically significant drivers of volatility; VIX, S&P 500, Gold, U.S. dollar index (DXY) and Google sear
Compressed air systems account for roughly 10 % of industrial electricity use, suggesting that even marginal gains in compressor efficiency yield substantial cost and emission savings. Although screw compressors are valued for their compact and reliable design, the process of optimizing the performance of a machine for a specific application is typically time-consuming due to manual testing under
What makes a place meaningful to a community, and what happens to those meanings when the city changes? This thesis investigates architecture's role as both keeper and creator of collective memory in urban environments. Building on sociological theories, this research explores how memories are stored in the built environment, not as static entities but continuously formed, repeated, and trans
Vehicular networks connect vehicles for improved road safety and efficiency with the assistance of wireless information exchange. Vehicular networks are based on the frequent broadcast of awareness messages referred to as CAM (Cooperative Awareness Messages) or BSM (Basic Safety Message) in the ETSI and SAE standards, respectively. Vehicular network technology mostly used nowadays is based on cell
Biomanipulation, i.e. to reduced planktivorous- and benthivorous fish in order to receive changes in the trophic structure has been a successful method to improve water quality and the ecological status in eutrophic lakes. The initial idea was to increase the abundance of large zooplankton and thus to cause a trophic cascade with reduced algal biomass. Many studies failed to observe an increase of
