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Synthesis and decomposition mechanisms of ternary Mg2FeH6 were investigated using in-situ synchrotron radiation powder X-ray diffraction (SR-PXD) and high-pressure differential scanning calorimetry (HP-DSC). Two routes for synthesis of Mg2FeH6 were studied. The first utilizes a ball-milled homogeneous MgH2-Fe powder mixture and the second uses a mixture of Fe and Mg formed by decomposition of the
With the large expansion of renewable energy sources such as wind- and solar, the stability and quality of electrical power can be affected. The transition towards large-scale wind power offers many opportunities to maintain stability by using power converters to create synthetic inertia. At request of Sweco Energy, this thesis shows the effect and importance of synthetic inertia used in wind powe
We discuss recent and on-going experiments, where molecular frame photoelectron angular distributions (MFPADs) of high kinetic energy photoelectrons are measured in order to determine the time evolution of molecular structures in the course of a photochemical event. These experiments include, on the one hand, measurements where single XUV/X-ray photons, obtained from a free electron laser (FEL) or
Popular Abstract in Swedish Transportsektorn står för 63% av Sveriges använding av kol, olja och gas. Biobränslen som etanol, biodiesel och biogas står bara för 6.8% av energin som används för nationella transporter, biogas står för 12% av detta. Ökad produktion av biobränslen för transproter behöver inte betyda minskad produktion av jordbruks- och skogsråvaror för annat. Dels kan restprodukter anBiofuels are currently produced from agricultural crops, and an increasing use of crops for this application is expected in the EU in the years to come. The dominating crops cultivated in the EU for biofuel production today have a relatively large environmental impact. The European Energy Agency has identified several lignocellulosic crops, including industrial hemp, as more sustainable potential
Measurement of the burning velocity of unstretched laminar hydrogen/air premixed flames suffers from large uncertainties owing to the highly diffusive nature of hydrogen that can give rise to flame instability. This paper reports on a numerical study of the structures and stability of laminar premixed CH4/O2/CO2 flames and H2/O2/N2 flames anchored to a heat-flux burner using a high-order numerical
Recent advances in high-intensity laser-produced plasmas have demonstrated their potential as compact charge particle accelerators. Unlike conventional accelerators, transient quasi-static charge separation acceleration fields in laser produced plasmas are highly localized and orders of magnitude larger. Manipulating these ion accelerators, to convert the fast ions to neutral atoms with little cha
Nonlinear optical methods have become ubiquitous in many scientific areas, from fundamental studies of timeresolved electron dynamics to microscopy and spectroscopy applications. They are, however, often limited to a certain range of parameters such as pulse energy and average power. Restrictions arise from, for example, the required field intensity as well as from parasitic nonlinear effects and
A Soft X-ray FEL (the SXL) is currently being designed at the MAX IV Laboratory. In the work to adapt the FEL to the scientific cases several advanced options are being studied for coherence enhancement, generation of short pulses and two-color pulses. We will discuss the current status and initial results of the schemes studied, especially regarding the FEL performance with the features of the MA
Designing a hole-transport material (HTM) that guarantees effective hole transport while self-assembling at the perovskite|HTM interface with the formation of an ordered interlayer, has recently emerged as a promising strategy for high-performance and stable perovskite solar cells (PSCs). Hydrogen bonding (HB) is a versatile multi-functional tool for the design of small molecular HTMs. However, to
This paper presents a detector developed to protect the ESS spallation target. The detector is installed to receive a proton beam that has a peak current of 62.5 mA, an average power of 5 MW, and energy up to 2 GeV. It is designed to detect any part of the proton beam that goes outside a defined aperture, which is deemed as an errant beam condition. This detector is mainly used for machine protect
Free-electron lasers (FELs) are promising devices for generating light with laser-like properties in the extreme ultraviolet and X-ray spectral regions. Recently, FELs based on the self-amplified spontaneous emission (SASE) mechanism have allowed major breakthroughs in diffraction and spectroscopy applications, despite the relatively large shot-to-shot intensity and photon-energy fluctuations and
Climate change is a central sustainability concern, but is often treated separately from other policy areas in environmental governance. In this article we study how low-carbon energy transitions might be governed in line with broader sustainability goals. We identify conflicts and synergies between low- carbon strategies and the attainment of longer-term environmental objectives by examining the
Microsoft Word - Tyler_Adkins_Thesis_Final.docx Overcoming barriers to energy efficiency retrofit measures in Swedish homes: An actor and policy analysis By: Tyler Adkins adkinstyler@gmail.com Submitted 16 May 2011 in partial fulfillment of the requirements for the degree of Master of Science in Environmental Studies & Sustainability Science (LUMES) at Lund University Supervised by: Bernadette Kis
https://www.lumes.lu.se/sites/lumes.lu.se/files/adkins_tyler_thesis_2011.pdf - 2026-07-15
Migration can influence host–parasite dynamics in animals by increasing exposure to parasites, by reducing the energy available for immune defense, or by culling of infected individuals. These mechanisms have been demonstrated in several comparative analyses; however, few studies have investigated whether conspecific variation in migration distance may also be related to infection risk. Here, we a
Working with innovation has become an essential factor in driving firm success in fast-changing industries like the energy sector. As a result, a considerable amount of previous research has focused on the innovation activities of employees working in R&D or similarly. However, a more recent field of research has focused on studying the employees outside these innovation-specific functions and
As greenhouse gas emissions are becoming a source of concern renewable fuels are becoming more and more interesting. Methanol is one such fuel. The main benefit of methanol is that it can be produced in two potentially carbon neutral ways. It can be produced from many sources of biomass, including wood, which makes it attractive in Sweden. In a long-term perspective it can also be produced from el
For the year 2020, the European Union has set common goals to aim for regarding the environment. One of them being to reduce the green house gas (GHG) emissions by 20 percent. The world population is increasing, consequently increasing the demand for energy and food. Since the use of fossil sources is neither sustainable nor environmentally friendly, new techniques of meeting the energy demand nee
Popular Abstract in Swedish Ett antal optiskt aktiva metalloorganiska Phe-AAn-Phe subenheter har syntetiserats via intramolekulär cyklisering av motsvarande bis(aminosyra)derivat. Bis(aminosyra)derivaten var i sin tur erhållna från en förbättrad multistegssyntes, vars nyckelsteg är Horner-Wadswort-Emmons olefinering av metalloorganiska aldehyder med fosfonylglycin-reagens, enantioselektiv hydrogenSeveral optically active organometallic Phe-AAn-Phe peptidomimetics and macrocyclic Phe-(Phe)n peptides have been synthesized by either intra- or intermolecular peptide bond formation of the corresponding bis(amino acid) derivatives. The key bis(amino acid) derivatives were available from an improved multi-step synthetic route, utilising Horner-Wadswort-Emmons olefination of organometallic aldehyd
