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Aircraft observations of precipitating clouds with cloud top temperatures higher than -38°C have revealed that Secondary Ice Production (SIP) is responsible for presence of majority of ice particles. One such SIP mechanism is fragmentation via collisions between ice particles. The central theme of this study is to understand the dependencies of this SIP mechanism and improve its existing numerical
Forests form the backbone of the European terrestrial carbon sink (State Forest Service & Ministry of Environment, 2018). As the European Union (EU) strives to become climate neutral by 2050, forests are accounted for the natural carbon absorption mechanism (European Commission, n.d.). Currently, the European net land carbon sink is decreasing largely due to forest ageing (Pilli et al., 2022),
This master thesis project was performed in collaboration with Johnson Matthey. Johnson Matthey is a worldwide company working with sustainable technologies. The site in Perstorp, where this work was performed, focus on formaldehyde production. In order to continuously improve chemical processes, simulation and modeling are advantageous tools. They can give a better understanding of the processes
This Master’s Thesis showcases two new time dependent calibration methods for the mean reversion parameter in the one-factor Hull-White model and evaluates their performance by hedging of a Bermudan swaption. The model is calibrated to market-implied swaption volatilities using a time-varying volatility approach. Particular emphasis is placed on a rigorous mathematical derivation of the model and
Water for Injection (WFI) is a critical utility in pharmaceutical manufacturing, traditionally produced through an energy-intensive distillation process. This thesis investigates the feasibility of a more sustainable alternative, ambient WFI production using membrane-based purification technologies combined with ozonation in the storage and distribution loop. Conducted in collaboration with AstraZ
Background: The global plant-based food shift puts high pressure on manufacturing capacity at facilities like Oatly's Landskrona site. This environment faces high combinatorial complexity due to growing product variety and sequence-dependent cleaning requirements. Relying on manual, experience-based planning to navigate these rules limits throughput and introduces organisational risk. Purpose
The transition from animal-based to plant-based proteins is rapidly increasing because of different concerns about meat consumption, some being the nutritional and environmental effects of meat consumption. During this transition, there needs to be a holistic approach to assessing plant-based food. This master thesis is focused on investigating the nutritional and environmental impact of three pla
The circumpolar Arctic is currently facing multiple global changes that have the potential to alter the capacity of tundra soils to store carbon. Yet, predicting changes in soil carbon is hindered by the fact that multiple factors simultaneously control processes sustaining carbon storage and we do not understand how they act in concert. Here, we investigated the effects of warmer temperatures, en
The global silicon (Si) cycle plays a critical role in regulating the biological pump and the carbon cycle in the oceans. A promising tool to reconstruct past dissolved silicic acid (DSi) concentrations is the silicon isotope signature of radiolaria (δ30Sirad), siliceous zooplankton that dwells at subsurface and intermediate water depths. However, to date, only a few studies on sediment δ30Sirad r
Background No effective standard treatment exists for patients with radioiodine-refractory, advanced differentiated thyroid carcinoma. We aimed to assess efficacy and safety of vandetanib, a tyrosine kinase inhibitor of RET, VEGFR and EGFR signalling, in this setting. Methods In this randomised, double-blind, phase 2 trial, we enrolled adults (aged >= 18 years) with locally advanced or metastatic
Background: Selected patients with advanced germ cell tumors have a poor prognosis. These include patients with brain, bone or liver metastases, very elevated tumor markers or primary mediastinal tumor. High-dose chemotherapy (HDCT) with autologous stem cell support is recommended in the Swedish and Norwegian Testicular Cancer Group (SWENOTECA) guidelines in selected poor risk patients with poor r
BACKGROUND: Preoperative anaemia is associated with increased use of blood transfusions, a greater risk of postoperative complications, and patient morbidity. The IRON NOF trial aimed to investigate whether the administration of i.v. iron in anaemic patients during hip fracture surgery reduced the need for blood transfusion and improved patient outcomes.METHODS: This phase III double-blind, random
Quantification using the Centiloid (CL) scale has become a valuable information to consider when interpreting amyloid-PET images and is now implemented in several software packages. This work aims to assess the comparability of CL from [18F]flutemetamol scans derived using several research and commercial quantification pipelines. Methods: This analysis relies on three datasets: a test-retest cohor
BACKGROUND: Long COVID has emerged as a global health challenge, with increasing evidence of cardiovascular sequelae. Most previous studies have focused on hospitalised cohorts, whereas cardiovascular risk in community-managed long COVID cases remains less explored. We aimed to investigate the incidence of major cardiovascular events in individuals with long COVID compared to those without long CO
BACKGROUND: Differences in cardiac sarcoidosis between racial groups remain understudied. Therefore, this study aims to explore race differences in patients with cardiac sarcoidosis. METHODS: We analyzed data from the Cardiac Sarcoidosis Consortium, an international registry including over 25 centers. The primary clinical outcome was a composite end point of all-cause mortality, left ventricular a
ObjectivesThis study investigates the impact of transitioning from restricted to 24/7 access to blood culture cabinets on blood culture processing.MethodA post-hoc retrospective study and a prospective laboratory simulation to evaluate the effects of delayed incubation were conducted. Data analysis evaluated clinical data comparing incubation-to-detection (ITD) and Collection-to-detection (CTD) in
Background: Hearing loss is estimated to affect more than 20% of the global population. Hearing aid fitting is a common intervention in audiological rehabilitation; however, there are still those who struggle with remaining communication difficulties that require additional intervention. The group rehabilitation program Active Communication Education (ACE) has been shown to be an effective alterna
Background: Accurately quantifying the risk of osteoporotic fracture is important for directing appropriate clinical interventions. While skeletal measures such as heel quantitative speed of sound (SOS) and dual-energy X-ray absorptiometry bone mineral density are able to predict the risk of osteoporotic fracture, the utility of such measurements is subject to the availability of equipment and hum
In the years 1945–52, that is, between Raoul Wallenberg's incarceration in the Lubianka prison in Moscow (6 February 1945) and the first Swedish demand for his return (11 February 1952), more than fifty people provided the Swedish Foreign Ministry with diffuse and often contradictory information about his whereabouts. This article argues that a number of these testimonies may have been part of a S
This paper revises the design process for closed-loop combustion control based on in-cycle feedback. Methods for the necessary observers, detectors and virtual sensors are also discussed. The control problem tackles the indicated efficiency optimization, following two approaches, direct and indirect optimization. The argumentation provides a comprehensive overview on how to specify and integrate d
