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We use a combination of field and satellite data to investigate the thermal regime in Lake Ladoga in spring 1992. The analysis concentrates mainly on the temperature structure in the convectively mixed region and the dynamics of a special thermo‐hydrodynamic phenomenon called “thermal bar” (a zone of descending water with the temperature of maximum density equal to ∼4°C). A theoretical model of th
Superconductor-semiconductor hybrid systems play a crucial role in realizing nanoscale quantum devices, including hybrid qubits, Majorana bound states, and Kitaev chains. For such hybrid devices, subgap states play a prominent role in their operation. In this paper, we study these subgap states via Coulomb and tunneling spectroscopy through a superconducting island defined in a semiconductor nanow
Geomechanical simulation of the evolution of a geological structure can play an important role in predicting open fracture development for all stages in that structure's development. In this work, three such geomechanical simulations are used to predict the evolving stress and strain fields, including dilational and compactional changes in the rock fabric in developing fault and fold systems. Thei
The main focus of this contribution consists in the elaboration of a continuum modelling approach accounting for dislocation-based quantities. Related deformation dependent history-variables are attached to individual material points and, moreover, are extended by means of gradients thereof so that so-called weak non-localities are captured. These gradients of internal variables may be further spe
A polymer electrolyte fuel cell (PEFC) is an electrochemical device that converts chemical energy into electrical energy and heat. The energy conversion is simple; however, the multiphysics phenomena involved in the energy conversion process must be analyzed in detail. The gas diffusion layer (GDL) provides a diffusion media for reactant gases and gives mechanical support to the fuel cell. It is a
Från marken skickas växthusgaser ut i atmosfären - kan jordbruket påverka detta? Klimatförändringarna har flera orsaker. Den största är naturligtvis avbränningen av fossila bränslen, men även mikrober i marken producerar stora mängder koldioxid när de bryter ner organiskt material i jorden. Andra typer av bakterier i jorden bryter ner metan som också är en viktig växthusgas. Nedbrytning av metan Rhizosphere interactions have high influence on the fluxes of carbon to and from terrestrial ecosystems. One very important part of the rhizosphere interactions is the rhizosphere priming effect (RPE) which is defined as changes in the decomposition rate of soil organic matter (SOM) in response to labile organic carbon input from plant roots. Changes in decomposition of SOM affect nutrient availab
The main purpose of this thesis is to explore how to deal with an industrial heritage in both urban and more detailed, architectural scale. The project location indicates another significant key issue - waterfront identity, which is essential for the city of Amsterdam. This thesis proposes a complex masterplan for the area, which provides diverse housing options, varied public spaces of different
Thesis purpose: The purpose of this paper is to investigate the antecedents of brand transparency and test their impact on the customers’ perception of transparency within the apparel industry. More specifically, the study has two objectives firstly, to identify the antecedents of consumers’ perception of brand transparency, and secondly, to empirically test the identified antecedents and their im
The increased population in Sweden entails that the transport needs also increases. To increase the transport needs also a capacity improvement. The increased transport needs entails shall be in operation in year 2035. Due to the High-speed of the train, 320 km/h, the larger cities Stockholm, Gothenburg and Malmö receive a better connection as the commuter will reach the destination much faster. T
There is an ongoing discussion in information retrieval research regarding the merits of subject indexing with controlled vocabularies as opposed to relying on free-text descriptions. Earlier research has compared subject headings with other metadata, such as document titles or tables of contents, to determine the relative value of subject headings as subject access points in an information search
Utvecklingen kring tunga automatiserade fordon framskrider, med den digitala infrastrukturen forskas det mycket om hur man ska få de fordonen på vägarna med de konventionella fordonen. Flera tester sker på dedikerad infrastruktur utan att behandla de konventionella fordonen. Det har inte genomförts många projekt i Sverige eller internationellt för att utreda vilka krav som krävs för att få automatThe development of the heavy automated vechiles is progressing at a fast rate, with the digital infrastructure allot of reasearch has been made to understand how the automated vechiles will drive on the roads with the conventional vechiles. Tests are being made on the infrastruture without the usages of conventional vechiles. Not many projcts have been carried out in sweden or internationally to i
The intra-granular stress and strain evolution of 12 quasi-spherical silica grains, subject to uniaxial loading, has been investigated by analysis of scanning x-ray diffraction data collected at the ID11 ESRF synchrotron beamline. By applying the methods described by Henningsson et al. [1], the intra-granular strains were reconstructed and converted into stresses using an anisotropic linear-elasti
Den tekniska utvecklingen och förändrade arbetsformer gör att det i dag är enklare än någonsin för arbetsgivare att kontrollera och övervaka arbetstagare. Under senare år har det blivit allt vanligare att arbetsgivare övervakar arbetstagares elektroniska kommunikation. Med elektronisk kommunikation avses arbetstagares kommunikation via användningen av arbetsgivares IT-utrustning och internetanslut
Gruvdrift på havsbotten har länge varit ett intressant ämne. Första gången någon hittade mineraler på havsbotten var i slutet av 1800-talet. Under de senaste åren har det skett en teknisk och ekonomisk utveckling som har gjort det möjligt att kommersiellt utvinna dessa mineraler. Samtidigt finns det många som oroar sig för de negativa miljöeffekterna. Det är nämligen omöjligt att bedriva djuphavsbDeep-seabed mining has been of interest ever since they found minerals at the bottom of the ocean at the end of the 19th century. There has been a technological and economic evolution in recent years, making it possible to commercially mine these minerals. At the same time, many worry about its negative environmental impacts. With today’s technology, it is impossible to conduct deep-sea mining wit
High intensity focused ultrasound is a growing technique for tissue ablation, among other uses, and given its destructive capabilities, there is a need for control of where the energy is delivered. There exist a number of methods for focusing such ultrasound arrays, but these often assume prior knowledge of the impulse response, or require extensive full-system simulations. This thesis explores sc
This research paper investigates the technical feasibility, system requirements, performance characteristics, and potential for optimization of an industrial heat pump in a district heating system, using the Modelon Impact platform. The study aims to provide a comprehensive understanding of the benefits and limitations of using cloud-based simulation platforms for the design and analysis of indust
Behovet av mer miljövänliga lösningar har aldrig varit större än idag. Mängden koldioxidutsläpp ökar ständigt, vilket leder till ökad mängd koldioxid i atmosfären. Vid tillverkning av plast används idag vanligtvis olja som råmaterial, men man kan använda biobaserat råmaterial i stället såsom socker. I Sverige produceras socker av sockerbetor. En restprodukt är då melass en tjock sirapsliknande socMolasses is a low value by-product from sugar production that is usually used for animal feed, bioethanol fermentation, and yeast growth substrate. Even though it is a by-product and most of the sugar have been taken out the molasses still contains a fair amount of sugar that can be used for production of HMF, a biobased platform chemical with many areas of application, for example as a feedstock
Bakgrund: Anestesisjuksköterskan ska bedriva en säker vård där ett personcentrerat förhållningssätt ska ligga till grund för patientmötet. Inom sjukvården är perifer venkatetersättning och intravenös kanylering bland de mest förekommande procedurerna. Dessutom förekommer stickprocedurer vid flertal andra interventioner som till exempel fosterdiagnostik och olika typer av vävnadsprover. Upp tilBackground: The anaesthesia nurse must provide safe care with a person-centred approach as the foundation for encounters. Peripheral venous catheterization and intravenous cannulation are among the most common procedures in healthcare. Additionally, needle procedures occur in various other interventions such as fetal diagnostics and tissue sampling. Up to 30% of adult patients expirience som fo
As Sweden’s population continues to age, concerns about regional labor shortages and the long-term sustainability of the welfare state have gained increased attention. This thesis investigates whether immigration has helped mitigate unemployment at the regional level, focusing on Sweden’s 21 regions over the period 2010–2020. Using data from Statistics Sweden, a panel dataset was constructed to an
