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Emerging storage devices, particularly ferroelectric tunnel junction (FTJ) memristors, offer a compelling solution for high-density storage as they form a type of non-charge based non-volatile storage capable of storing multiple bits in each device; however, their adoption is hindered by reliability concerns. This work addresses this by presenting a design and implementation of an efficient Error

High-elevation hydropower units in California might be sensitive to climate warming since they have been designed to take advantage of snowmelt and have low built-in storage capacities. Snowmelt is expected to shift to earlier in the year and the system might not be able to store sufficient water for release in high-electricity-demanding periods. Previous studies have tried to explore the climate

High-elevation hydropower units in California might be sensitive to climate warming since they have been designed to take advantage of snowmelt and have low built-in storage capacities. Snowmelt is expected to shift to earlier in the year and the system might not be able to store sufficient water for release in high-electricity-demanding periods. Previous studies have tried to explore the climate

The thesis focuses on the design of a laboratory setup for a 100 kW fuel cell system, intended for heavy-duty vehicle applications. The increasing interest in Proton Exchange Membrane (PEM) fuel cells as a viable alternative for long-haul transport stems from the limitations of battery-electric vehicles, particularly due to the weight and energy density constraints of current battery technologies.

Klimatkrisen är en av de största utmaningar som mänskligheten någonsin stått inför och mycket krävs för att bevara klimatet. Många forskare letar lösningar för att stävja de värsta effekterna av ett förändrat klimat. Ett av de mest aktuella problemen är att förhindra eller sakta ned den globala uppvärmningen eftersom det rapporterats att vissa effekter är oåterkalleliga när de väl trätt i kraft, sThis thesis report on an investigation into the applicability of mid-infrared degenerate four-wave mixing (IR-DWFM) as a method to detect N\(_2\)O in ammonia flames. DFWM has previously been used for concentration measurements on other molecules, but has never, to the author's knowledge, been applied to measure N\(_2\)O in ammonia flames before. Through measurements in gas flows at different t

Autoignition of hydrogen in air was studied in a turbulent flow reactor using OH*-chemiluminescence. High-speed imaging was used to visualise the formation of auto-ignition kernels in the flow, and to analyse the conditions under which temporary stabilisation of the flame kernels occurred. The experiments were carried out at temperatures of 800-850 K, pressures of 0.8-1.2 MPa and an equivalence ra

Increasing renewable integration is posing new challenges to reliability of power networks. One of these challenges is to restart the power network and energize power transformers in the event of a blackout. Grid forming converters can provide a potential solution to this issue because they can be controlled as independent, self starting, voltage sources. This study analyzes and compares four grid

Hydrogen atoms are key species in combustion of hydrogen/hydrocarbon fuels. Interference-free detection of hydrogen atoms natively generated in flames using femtosecond laser-induced fluorescence (LIF) was investigated employing two colors, i.e., 243 nm and 486 nm, as excitation source: two-photon excitation followed by a relay one-photon excitation. This strategy was compared with another commonl

Heavy-duty transport is one of the major contributors to global greenhouse gas (GHG) emissions, with internal combustion engines (ICEs) expected to remain an important propulsion technology in long-haul applications during the transition to sustainable transport. The use of renewable gaseous fuels such as biogas and hydrogen offers a promising pathway to significantly reduce the climate impact of

Hydrogen has been shown to occur as a trace element in many nominally anhydrous minerals. The presence of hydrogen in several of the major minerals in the Earth's mantle has received attention, due to the possibility that these phases provide a significant hydrogen reservoir. Recently an experimental and analytical procedure for hydrogen measurements in thin mineral samples by proton-proton scatte

MESS57, 7.5 credits The course discusses fundamental energy concepts covering the environmental and technological properties as well as societal priorities of energy systems. A particular focus is put on energy transitions, including both societal and environmental dimensions. In this context we will discuss for example energy justice dimensions and spatial aspects (land demand) in the context of

https://www.lumes.lu.se/programme-overview/programme-outline/3rd-semester/energy-transitions-and-sustainability - 2026-06-09

Crayfish spermatophores are deposited on the body surface of the female during mating and remain there for a period of time before fertilization ensues. Post-mating changes in protein expression level in the noble crayfish Astacus astacus spermatophore were quantified. In-gel digestion and high resolution mass spectrometry were used for label-free protein quantification. One hundred twelve protein

Various transport phenomena in conjunction with chemical reactions are strongly affected by reformer configurations and properties of involved porous catalyst layers. The considered composite duct is relevant for a methane steam reformer and consists of a porous layer for the catalytic chemical reactions, the fuel gas flow duct and solid plate. In this paper, a fully three-dimensional calculation

Microorganisms are important sources of diverse intracellular and extracellular biopolymers havingdifferent functions such as serving as carbon and energy reserves, or as protective layers around the cells in theform of capsules and/or biofilms. They have also found use in foods, medicine and other industrial applications.Research on understanding the synthesis of several biopolymers as well as th

Crystalline magnesium stearate has been extensively used as an additive in pharmaceutical and other industries for decades. However, the lack of suitably large crystals has hindered the determination of the crystal structure and thereby a more fundamental understanding of the structure-functionality relationship. Presented here is the structure of magnesium stearate trihydrate as determined from X

1 Water’s Journey from Rain to Stream by Harald Grip and Allan Rodhe Preliminary translation into English by Harald Grip and Kevin Bishop (edited January 2015) The Swedish edition: Grip, H. and Rodhe, A., 2000, Vattnets väg från regn till bäck, Hallgren & Fallgren, Uppsala (earlier edition Forskningsrådens förlagstjänst 1985) 2 Contents 1. The origin of streamwater – a controversy ................

https://www.nateko.lu.se/sites/nateko.lu.se/files/waters_journey_jan2015a.pdf - 2026-06-10

How can participation inform bottom-up driven energy system transition? Broken Loop Current Situation • Dependence on fossil fuels • Creation of hazardous wastes • Dependence on not secure energy prices • Dependence on foreign country supply • High CO2 and other GHG emissions Marina Nart Program: MSc. in Environmental Studies and Sustainability Science (LUMES) Supervisors: Henner Bush and Bodil El

https://www.graduateschool.sam.lu.se/sites/graduateschool.sam.lu.se/files/marina_poster-1.pdf - 2026-06-10