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Electron beam sizes and lifetimes at MAX II and MAX III

Popular Abstract in Swedish När elektroner som färdas i en hastighet nära ljusets hastighet böjs av i ett magnetfält genereras framåtriktad elektromagnetisk strålning. Denna strålning, som även kallas synkrotronljus, kan användas för att studera strukturer och egenskaper hos olika material. Vid en synkrotronljuskälla, som t.ex. MAX II eller MAX III vid MAX-lab i Lund, cirkulerar elektroner runt i The MAX II and MAX III synchrotron light sources at MAX-lab provide synchrotron radiation for experiments in a wide variety of research fields. The synchrotron radiation is emitted by ultra-relativistic electrons circulating in electron storage rings. In this thesis the transverse and longitudinal electron beam sizes and the electron beam lifetime limitations in electron storage rings are discusse

Competing water dissociation channels on rutile TiO2(110)

The interplay between two different water dissociation channels on rutile TiO2(110) was studied with the use of synchrotron radiation photoelectron spectroscopy. It was found that water dissociation at oxygen vacancies competes with water dissociation on defect-free regions such that one vacancy assisted dissociation event cancels one dissociation event on defect-free regions. The quenching affect

Benchmarking - självklart eller oklart?

Efter att under tre år utvärderat1 det så kallade Jämförelseprojektet2 kan vi konstatera att benchmarking i Sveriges kommuner inte kan ges samma klara innehåll avseende syfte, innehåll och form. När 190 kommuner deltagit i projektet och upp till 28 olika nätverk varit igång, är det naturligtvis inte så konstigt om det finns en variation i de sätt som benchmarking tillämpas på. Och det kan knappast

Red alert for women's heart: the urgent need for more research and knowledge on cardiovascular disease in women

A recent report of the EuroHeart project has shown that women are still underrepresented in many cardiovascular clinical trials, while important gender differences are present within most areas of heart disease. As the burden of cardiovascular disease is increasing in middle-aged women relative to men, a more profound understanding is needed of the fundamental biological differences that exist bet

Atmospheric methane removal by boreal plants

Several studies have proposed aerobic methane (CH4) emissions by plants. If confirmed, these findings would further increase the imbalance in the global CH4 budget which today underestimates CH4 sinks. Oxidation by OH-radicals in the troposphere is the major identified sink followed by smaller contribution from stratospheric loss and oxidation by methano- and methylotrophic bacteria in soils. This

Magnetic anisotropy investigations of (Ga,Mn)As with a large epitaxial strain

Magnetic properties of 20 nm thick (Ga,Mn)As layer deposited on (Ga,ln)As buffer with very large epitaxial tensile strain are investigated. Gal,In,As buffer with x=30% provides a 2% lattice mismatch, which is an important extension of the mismatch range studied so far (up to 0.5%). Evolution of magnetic anisotropy as a function of temperature is determined by magnetotransport measurements. Additio

Comparison of geoelectrical imaging and tunnel documentation at the Hallandsas Tunnel, Sweden

For construction in rock a thorough pre-investigation is important in order to avoid unforeseen conditions which may delay the work. It is crucial to remember the results from this investigation in the further work, and use the experience from the construction to update the geological prognosis and reduce the uncertainties. Different geophysical methods have proved valuable tools in such investiga

Trepanation - en uråldrig operationsteknik

Abstract in Undetermined De arkeologiska, medicinhistoriska och etnografiska källorna visar att trepanationer är ett univer- sellt fenomen, men också intimt kulturspecifikt i sitt syfte och i sin handling. Denna operationskonst visar att personer klarat de påfrestningar ett sådant ingrepp medfört, och att kunskapen om hälsa och ohälsa inte varit främmande i de mest skilda kulturella sammanhang. De

Enhanced stability of laser wakefield acceleration using dielectric capillary tubes

The stability of beams of laser wakefield accelerated electrons in dielectric capillary tubes is experimentally investigated. These beams are found to be more stable in charge and pointing than the corresponding beams of electrons accelerated in a gas jet. Electron beams with an average charge of 43 pC and a standard deviation of 14% are generated. The fluctuations in charge are partly correlated

Assessment of lumbar radicular pain. Validity and predictive value of clinical tests

Popular Abstract in Swedish Kroniska ländryggsbesvär är en ekonomisk belastning för sjukvården och samhället i stort, och ger framför allt ett personligt lidande för den drabbade. Nästan alla (75-80 %) kommer att ha åtminstone en episod med ryggbesvär någon gång under sin livstid. Hälften av dessa kommer att ha utstrålande bensmärtor och ofta är besvären ett symtom på ischias (nervrotspåverkan). MRadicular pain is in the majority of cases caused by a disc herniation with a coexisting inflammation. It is characterized by positive neural tension tests, such as the Slump test, and by decreased range of motion (ROM) in the straight leg raising test (SLR) and lumbar flexion (Fingertip-to-floor test[FTF]). This may suggest that improvement in ROM correlates to reduction of self-reported disabili

Dark diversity in dry calcareous grasslands is determined by dispersal ability and stress-tolerance

Temperate calcareous grasslands are characterized by high levels of species richness at small spatial scales. Nevertheless, many species from a habitat-specific regional species pool may be absent from local communities and represent the dark diversity' of these sites. Here we investigate dry calcareous grasslands in northern Europe to determine what proportion of the habitat-specific species pool

A population-based study of patterns of care for muscle-invasive bladder cancer in Sweden

Objective. To analyse the management of muscle-invasive bladder cancer in a population-based national register, and specifically to investigate the role of curative therapy (i.e. cystectomy or radiotherapy) in relation to patient, tumour and hospital characteristics. Material and methods. The Swedish Bladder Cancer Register covers more than 90% of all patients in the country who have been diagnose

Stilla flyter Maas : senromersk strategi och logistik i den arkeologiska rekonstruktionen.

This dissertation deals with antique warfare in general and late Roman warfare in particular. The overall aim is to discuss the concept of strategy in the archaeological and historical reconstruction, based on Edward N. Luttwak’s groundbreaking work The Grand Strategy of the Roman Empire (1976). Luttwak’s influence on various provincial Roman research fields cannot be underestimated, but the book

Strength characteristics of aerobic granular sludge

Aerobic granular sludge has a number of advantages over conventional activated sludge flocs, such as cohesive and strong matrix, fast settling characteristic, high biomass retention and ability to withstand high organic loadings, all aspects leading towards a compact reactor system. Still there are very few studies on the strength of aerobic granules. A procedure that has been used previously for

Removal of woody vegetation from uncultivated field margins is insufficient to promote non-woody vascular plant diversity

Uncultivated field margins are one of the most frequent non-crop habitat types in contemporary, highintensity agricultural landscapes and may therefore be important for the persistence of many farmland species. Managing field margins in a way that preserves, and preferably enhances, their value for biodiversity is therefore important. In the present study, we evaluate how the flora of uncultivated