Filtyp
This thesis proposes a fully integrated transformer-coupled active power and antenna impedance detector for WLAN 802.11ax 5 and 6 GHz frequency bands. The detector is integrated into a transceiver, utilising the receive chain to down convert sensed RF voltage and current and digitally calculate the active power and antenna impedance on-chip. The RF current measurement is realized by a sense windin
Den svenska anläggningsbranschen har på senare år drabbats av betydande utmaningar till följd av onormala prisökningar på material och förnödenheter, vilket särskilt har haft en påverkan på fastprisentreprenader. Dessa kostnadsökningar har skapat en osäkerhet bland entreprenörer, särskilt på grund av bristen på tydliga riktlinjer och rättspraxis i kapitel 6 § 3 i standardavtalen AB 04 och ABT 06 s
Denna studie undersöker en parallell indirekt solassisterat värmepump (SAVP) för ett typiskt hushåll i Tyskland. Systemet utgörs av fotovoltaisk-termiska (FVT) solfångare och en värmepump (VP) för att täcka behovet av värme, varmvatten och hushållsel genom att använda solvärme, solel och nätel. Syftet var att utvärdera SAVP-systemets prestanda i Tysklands tre största städer för olika VPar med olikThis study investigates a parallel indirect Solar-Assisted Heat Pump (SAHP) system for a typical household in Germany. The system integrates Photovoltaic-Thermal (PVT) collectors and a heat pump (HP) to meet space heating, domestic hot water, and appliance electricity demands using solar thermal energy, solar electrical energy, and grid electricity. The objectives were to evaluate the thermodynami
Introduction: The forest industry might not be the first thing to come to mind when thinking of chemistry, but the analysis of cooking chemicals in wood pulping involves many laboratory methods. Background: The chemical recovery cycle is an integral part of the Kraft process, which makes laboratory analyses of different steps of the process necessary. In the recovery boiler, sulfur is reduced to
Bakgrund: Det är välkänt att ohälsosamma levnadsvanor, såsom osund kost, fysisk inaktivitet, alkoholriskbruk och rökning är välkända riskfaktorer som kraftigt ökar risken för komplikationer vid diabetes typ 2. Trots insikten om riskerna kan det vara utmanande att ändra levnadsvanor, vilket gör diabetessjuksköterskans hälsofrämjande arbete avgörande för att stödja och motivera patienter till positi
This study evaluates a 12-bit Time-Interleaved (TI) Digital-to-Analog Converter (DAC) operating at 24 GS/s, incorporating Return-to-Zero (RZ) scheming within its sub-DAC cores. Initially, the TI DAC demonstrates superior performance compared to a traditional single-channel DAC. However, the evaluation in this thesis reveals that the TI DAC is more sensitive to timing errors, such as clock skew and
Surface finish and surface integrity is important to produce high quality parts in the manufacturing industry. This is controlled by properties on the cutting tools such as edge radius, edge preparation, coating etc. Solid carbide tools are often coated with PVD coating technologies where AlCrN is a common coating composition. Tooling for small parts machining often creates issues with coating as
Concerns about the degradation of forests in Sweden have given rise to several sustainability initiatives, coming both from the private and the public sector. Forest certification established itself in a Swedish context in the 1990s and its uptake has coincided with developments in public policy. By applying Cashore et al. 's (2021) theoretical and conceptual framework, highlighting the intera
Fire investigations are used to analyze fire scenes, typically with the aim of finding the cause of the fire or to understand the fire spread. Fire investigations can be the basis for the outcome of legal cases, future accident preventative work or the outcome of financial disputes and can thus be important and impactful. It is therefore of the outmost importance that they are conducted so that
Testing electrical units and systems is an important part of the production process. The development and generation of hardware tests are a labor-intensive process that requires expertise and deep understanding of the system’s behavior. This thesis explores the application of Large Language Models (LLMs) in generating hardware test steps. The research employs a comparative analysis of several LLM
In the 20th century, big innovative steps were made in the cutting tool industry. Two Swedish companies, today Seco Tools AB and Sandvik Coromant, were some of the first companies to use cemented carbide as tool material. In 1969 Sandvik Coromant introduced a layer of titanium carbides on top of a cemented carbide substrate to improve its performance. Coating materials have been continuously devel
Architecture and space in the scale of a family house can be about rounded shapes interplaying with straight lines and light. In today’s newly built houses in Sweden I sense a lack of variety in combinations of these elements. This project therefore aims to experiment with rounded shapes and straight lines together with light. A collection of the explorations act as the base to draw a house. A vil
Portfolio optimization involves selecting assets to maximize risk-adjusted returns, typically using linear methods like Mean-Variance Optimization (MVO). However, such approaches may not fully capture the complexities of financial markets. This study leverages recent advances in machine learning, specifically reinforcement learning with deep neural networks, to identify alternative methods that ma
As the life expectancy continues to increase in Sweden, with an estimated increase of 5 years for women and 6 years for men between 2024 and 2070, there is an increasing need for solutions that enables elderly people, and individuals with a need for extra safety, to live an independent and healthy life. One solution that is under development, is a mobile social alarm in the form of a watch, which
