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The purpose of this study is to design and investigate a pulsating heat pipe device (PHP). A PHP is a two-phase flow heat transfer device which can handle high heat fluxes with passive internal flow. It is made of a continuous loop serpentine, partially filled with a working fluid that can cool systems, such as electronic devices. It differs from a conventional heat pipe device in design and opera
Most (93%) of the greenhouse gas emissions in the transport sector come from road traffic in Sweden which includes passenger and freight transport activity (Trafikverket, 2022). The aim of this thesis was to understand pathways that transport purchasers can pursue to reach the fossil-free transportation goals from manufacturing plant to customer and to develop a process for assessing a market and
Den globala uppvärmningen är ett faktum. Stål är ett material som används i stor utsträckning och kan på grund av dess egenskaper inte alltid bytas ut mot alternativa material. Problemet är att stålindustrin står för en betydande del av Sveriges koldioxidutsläpp. Studiens syfte är att försöka skapa en uppfattning om de klimatvinster som kan göras om traditionellt stål ersätts av fossilfritt st
Mining operations have significant environmental and social impacts, including ecosystem fragmentation, biodiversity loss, pollution, and social issues such as low wages and unsafe working conditions. Despite these negative effects, mining plays a crucial role in the transition to low-carbon technologies and the demand for energy transition minerals is expected to surge. However, the potential per
The end of the Sri Lankan war was marked by a devastating loss of life, with hundreds of thousands of casualties. Amidst this tragedy, victims have claimed that the crimes committed against them constitute genocide, specifically targeting the Eelam Tamils solely because of their ethnic identity. However, denialists argue that there is insufficient evidence to support the presence of genocidal inte
Att med magi försöka locka åt sig ett objekt för sin kärlek är en företeelse som förekommit i många kulturer och Egypten under hellenistisk och romersk tid är inget undantag. Målet med detta arbete är att undersöka just denna typ av magi. För detta ändamål har jag valt att undersöka vad jag anser kan kallas för kärleksbesvärjelser i korpusen Papyri Graecae Magicae (PGM). De typer av texter jag u
I romersk litteratur förekommer en uppsjö av historier i vilka olika typer av andeväsen uppträder. Tre av de sorters andeväsen som dyker upp på ett flertal ställen i romersk litteratur och som kan kopplas till varandra är Manes, Lemures och Larvae. Målet med denna uppsats har varit att få en klarare bild av dessa andeväsens natur samt undersöka deras uppträdande i interaktioner med människor samt
Cities play a crucial role in mitigating climate change, yet reducing transportation emissions remains a challenge. Achieving decarbonization in the transportation sector requires systemic transformations across society. However, there is still a limited understanding of how transitions within transportation can be achieved, and further insight is needed to guide cities in driving transformative c
With an ongoing energy crisis in Europe and an ever-evolving political climate where the environmental impacts of industries are regarded as a top priority, the topic of energy efficiency is high on everyone’s agenda. Mathematical optimization of energy consumption requires a model of the problem at hand. In this thesis linear regression is compared with the gradient boosted trees method and a neu
This research focuses on synthesizing three cobalt complexes by ligands consisting of different conjugated systems and analysing their catalytic properties. These cobalt compounds are to be used to catalyse the reduction of protons generated in the reaction of water splitting. The reverse of water splitting is used in fuel cells and consists of oxidizing hydrogen gas to protons and electrons follo
The Swedish energy market is becoming more and more sustainable, with an increasing volume and number of diversified energy sources being continuously added to the mix. To stabilize the grid frequency, auctions are held to offer energy providers incentives to produce or consume energy on short notice. This paper is applying different multivariate time series models and their ensemble to find relia
There is growing pressure from stakeholders on global corporations to ensure the sustainability of their products throughout the supply chain. At the same time, due to the high complexity and dynamism of supply chains, companies often do not know what actors operate in their supply chains beyond direct suppliers. Supply chain visibility (SCV) and transparency (SCT) are crucial for ensuring respons
Livsmedelsindustrin har stor miljömässig påverkan och uppfyller inte de krav som ställs för att industrin ska betraktas som hållbar. Konsumenterna är en av de viktigaste intressenterna för att kunna implementera hållbar konsumtion. Genom att studera och analysera hur konsumenter skapar värde fås ökad förståelse för vad som driver hållbar konsumtion i livsmedelsindustrin ur konsumentperspektivet. S
Green hydrogen is an advantageous clean energy carrier that enables the decarbonization of hard-to-abate sectors and addresses the intermittency of renewables. However, its global production is currently constrained by inadequate infrastructure, high investment risks, and relatively technological infancy. Failure to scale green hydrogen could hinder decarbonization efforts and climate goals. Recog
Nationalparker utgör ett centralt element i naturvård runt hela jorden. Utöver naturvård så utgör tron på deras positiva effekt för regionalekonomisk utveckling en allt vanligare motivering för att grunda nya nationalparker. Forskningsläget kring omfattningen av sådana effekter är dock oklart och den ekonomiska effekten av nationalparker i Syd-, Väst, och Mellansverige har inte analyserats i någonNational parks are key parts of worldwide conservation initiatives. Increasingly, they are being founded not only to meet conservation goals but also because of their potential positive impact on regional economies. However, the results of previous research are ambiguous when it comes to assessing the magnitude of this effect and no such studies have been conducted for national parks in southern,
Syftet med studien går ut på att undersöka och analysera vilka karaktäristiska egenskaper och färdigheter som en projektledare bör besitta eller utveckla för att lyckas i sin roll. Vidare kommer studien att undersöka projektledarens ledarskapsstil för att få en uppfattning om hur det påverkar ett projekts framgång. Genom att identifiera dessa egenskaper och färdigheter kan arbetet bidra till att ö
The survival and persistence of the threatened Marsh Fritillary butterfly (E. aurinia) is linked to the availability of its host plant, the Devil’s Bit (S. pratensis), which primarily inhibits calcareous grasslands. Previous research has established that mapping the distribution of S. pratensis serves as a reliable indicator for identifying the presence of E. aurinina larvae nests. In this study,
In workplaces, a lot of knowledge is lost when colleagues change positions. What was once obvious to one person can be incomprehensible to the next. This problem has been encountered by Probation Labs Sweden AB with their biochemical instrument, Labbot. Labbot facilitates researchers in automating their protein analysis. It works like a multi-tool where users can perform one or several tasks in a
