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Methyl ammonium lead halides (MAPbX3 , X=Cl-, Br-,I-), crystallizing in a perovskite structure, have in recent years been shown to be a promising material as a light harvesting material in solar cells. It has many interesting properties which makes it suitable for solar cell applications, such as near-optimal band gap and long electron-hole diffusion lengths, as well as the possibility of synthesi
Nanowire solar cells have the potential to reach the same efficiencies as the world-record III-V solar cells while using a fraction of the material. For solar energy harvesting, large-area nanowire solar cells have to be processed. In this work, we demonstrate the synthesis of epitaxial InP nanowire arrays on a 2 inch wafer. We define five array areas with different nanowire diameters on the same
The role of proteins as the mediators of the interaction between engineered materials (biomaterials) and living systems has long been appreciated, but the subtleties and complexities introduced by changing surface curvature are only beginning to be understood. Thus, in implant devices, where the biomaterial is presented as a flat surface, a very limited range of proteins bind to the material, thes
Abstract: Optical flow provides an opportunity to elevate the resolution and sensitivity of deflection sensing in background-oriented schlieren (BOS). Despite extensive relevant literature within the field of computer vision, there is a lack of proper quantification of its abilities and limitations with regard to the state-of-the-art BOS experiments. Thus, this study performs an assessment of accu
This section gives an overview of Lake Victoria, that is currently underutilized for cargo transportation by the 3 East African states of Uganda, Kenya and Tanzania, despite the great potential of this shared water body for multimodal transport and trade opportunities. In order to sustainably develop infrastructure on Lake Victoria, the three member states must adopt sustainable business models t
This project aims to design a radial inflow microturbine that will be part of a system to generate both heat and electricity. Considering the specific power and the mass flow rates involved with the system, a radial inflow turbine was chosen. This type of turbine provides much larger power density in a single stage compared to the other types.
Increase of urbanization and climate change are one of the factors that have been highlighted to influence the change of urban runoff hydrograph. This is resulting in an increase in peak flow within an urban watershed. Downstream flooding is the main problem that arises. To solve this, the sustainable urban drainage system techniques are adopted for reducing peak flow and increase baseflow. This t
I denna examensarbetesrapport beskrivs utvecklingen av en dold och hållbar produkt för ström och signalöverföring till skjutdörrars rörliga dörrblad. Examensarbetet har genomförts i samarbete med Assa Abloy Entrance Systems, med målet att möjliggöra användningen av tillbehör som smarta glas, skärmar integrerade i dörrglaset, elektriska lås och sensorer monterade på dörrbladen hos deras skjutdörrarThis master’s thesis report describes the product development process of a durable and concealed product for transferring power and signals to the moving door leafs of sliding doors. The thesis has been conducted in collaboration with Assa Abloy Entrance Systems, with the goal of enabling the use of accessories such as privacy e-glass, screens integrated in the glass, electric locks and sensors mo
To mitigate greenhouse gas emissions resulting from the combustion of fossil fuels in conventional transportation—including vehicles, ships, and aircraft—a wide range of alternative energy sources have been explored, such as liquefied natural gas (LNG), methanol, liquefied petroleum gas (LPG), biomass, solar energy, hydrogen, fuel cells, and batteries. Among these, battery electric propulsion syst
The main goal of this investigation is to determine the optimal number of cashiers to be employed in a first-in-first-out (FIFO) queuing system, based on the number of customer arrivals, the average revenue generated per customer, and the rate at which each customer abandons the queue, referred to as the reneging rate. This is done by using continuous-time homogeneous Markov Chains to model the ar
To reduce reliance on energy-intensive, chemically synthesised nitrogen sources in microbial cultivation, we investigated the integration of the nitrogen-fixing bacterium Azotobacter vinelandii into a bioconversion process with the recombinant yeast Saccharomyces cerevisiae. Our objective was to develop a more sustainable approach by utilising biological nitrogen fixation to supply ammonium direct
100 000 elderly fall each year, costing the healthcare system up to 750 million SEK. Beyond the financial part, these accidents could lead to serious injuries such as head trauma or hip replacements, and in the worst case, even death. This project aims to find a preventive technique that will make life easier for the elderly while saving money and resources for society. The aim is to gather data
The number and complexity of modern software systems have increased substantially since their inception. This unrelenting growth is making manual code review more difficult year by year, and the gap between the amount of code and security verification creates a critical need for automated tools that can assist developers in detecting vulnerabilities. A possible solution to this is large language m
Long-term university–industry strategic partnerships require continuous coordination across multiple activities, focus areas, roles, and governance levels. Using the Tetra Pak–Lund University (TP–LU) partnership as the empirical setting, this thesis aims to design a strategic partnership dashboard for governance support and to develop design-oriented knowledge for shared dashboard use in similar l
Preterm infants benefit from combined supplementation of arachidonic acid (ARA), docosahex-aenoic acid (DHA) and choline, but ARA/DHA-rich oils are highly susceptible to lipid oxida-tion. This project aimed to develop and evaluate choline-enriched DHA/ARA oil-in-water emulsions with suitable physical and oxidative stability. Emulsions were prepared by high-pressure homogenization using two AquaCel
This thesis investigates the application of Artificial Intelligence (AI) and Machine Learning (ML) methods to improve carbon footprint estimation for Integrated Circuit (IC) components in automotive Cost Engineering (CE). The work addresses challenges faced by electrical cost engineers at Volvo Cars: the manual, time-consuming process of collecting component specifications, and estimating Carbon D
This thesis aims to develop and evaluate a fast design and optimisation workflow for corrugated tubes used in tubular heat exchangers by combining computational fluid dynamics (CFD) simulations and machine learning. A steady-state Reynolds-averaged Navier-Stokes (RANS) model was established to simplify the simulation process and reduce computational time. Based on the selected CFD setup, a CFD dat
The paper suggests a method for motion generating and stabilization with application to dynamical models for underactuated ships.
