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We present a search for a light (mass < 2 GeV) boson predicted by Hidden Valley supersymmetric models that decays into a final state consisting of collimated muons or electrons, denoted "lepton-jets". The analysis uses 5 fb(-1) of root s = 7 TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider to search for the following signatures: single lepton-jets with a
Non-negative matrix factorization (NMF) condenses high-dimensional data into lower-dimensional models subject to the requirement that data can only be added, never subtracted. However, the NMF problem does not have a unique solution, creating a need for additional constraints (regularization constraints) to promote informative solutions. Regularized NMF problems are more complicated than conventio
Diabetes mellitus is one of the most common endocrine disorders in dogs and is commonly proposed to be of autoimmune origin. Although the clinical presentation of human type 1 diabetes (T1D) and canine diabetes are similar, the aetiologies may differ. The aim of this study was to investigate if autoimmune aetiology resembling human T1D is as prevalent in dogs as previously reported.
Background The ankle brachial index (ABI) is related to risk of cardiovascular events independent of the Framingham risk score (FRS). The aim of this study was to develop and evaluate a risk model for cardiovascular events incorporating the ABI and FRS. Design An analysis of participant data from 18 cohorts in which 24,375 men and 20,377 women free of coronary heart disease had ABI measured and w
Cannulation of the papilla vateri represents an enigmatic first step in endoscopic retrograde cholangiopancreaticography (ERCP). In light of falling numbers of (diagnostic) ERCP and novel techniques, e. g. short-wire system, we were interested in the approach novice and experienced endoscopist are taking; especially, what makes a papilla difficult to cannulate and how to approach this. We devised
A bench-scale unit for the development of an enzymatic process for the bioconversion of lignocellulosics to ethanol has been used to study the recycling of waste-water streams to minimize fresh-water requirements and reduce effluent streams. Willow, after impregnation with sulphur dioxide, was steam-pretreated, enzymatically hydrolysed, and the sugars produced were fermented using S. cerevisiae. T
Background-Considerable variability exists in the use of pharmacological thromboprophylaxis among acutely ill medical patients, partly because clinically relevant end points have not been fully assessed in this population. We undertook an international, multicenter, randomized, double-blind, placebo-controlled trial using clinically important outcomes to assess the efficacy and safety of daltepari
Experience curves are used to analyse the prospects for diffusion and adoption of renewable energy technologies, with special emphasis on wind turbines and photovoltaic (PV) modules. The analysis shows that the possibility of cost reductions of renewable energy technologies is greater than for conventional energy technologies. However, large investments are necessary to make wind turbines and PV m
The aim of the present study was to take a closer look into the evidence for a theory of prehistoric string manufacture, formulated by the British archaeologist Karen Hardy in the article Prehistoric string theory. How twisted fibers helped to shape the world (Hardy, 2008). A problem with the article, with the relevance and validity of the presented evidence as substance for the theory, was the mi
Recent trends of permafrost thawing in the subarctic are expected to cause increased release of dissolved organic carbon (DOC) to inland waters, which might have cascading effects on downstream aquatic ecosystems and release of CO2 to the atmosphere. This study therefore aimed at evaluating the applicability of an empirical band ratio algorithm for estimating chromophoric dissolved organic matter
As previous research on content-specificity of the neural correlates of recollection is inconclusive, event-related potentials were used to assess old/new effects for faces, objects and words. The data demonstrate temporal differences in ERP old/new effects as a function of item type, supporting the notion that material-dependent processes underlie recollection-related neural activity. The results
We test a new approach to calculate the mean velocity and velocity dispersion for a sample of nearby stars when their radial velocities are not available. The most commonly used method (here called the projection method, PM) was introduced in a paper by Dehnen & Binney (1998). That method is here compared, theoretically and numerically, with an application of the Maximum Likelihood (ML) method
This thesis reports the results from a pollen analytical and quantitative landscape reconstruction (REVEALS model) study in the drainage area of the Botorpsströmmen River in southern Sweden as a part of the project The archaeology and ecology of collapse: social and agricultural change following the Black Death and the project Managing Multiple Stressors in the Baltic Sea. The focus of this study
Background: With todays’ requirement of shorter product life cycles and faster time-to-market, producing companies experience an increased demand for faster transports in the supply chain. This puts pressure on freight forwarders to offer their customers a timely and reliable transport service at a reasonable price. Another challenge for the freight forwarders in Sweden is to provide such services
The world around us is urbanising at a faster rate than ever. Today more than 70 per cent of the European population lives in urban areas, especially small and medium-sized cities. Often, cities are the centres of economic growth. In the context of urban pollution and climate change, cities are at the core of European policies due to their ability to be the ‘places’ where solutions and innovations
The WEEE Directive requires the producers to fulfil e-waste compliance according to the extended producer responsibility (EPR) principle. In order for producers to comply with the requirements nationally, collective compliance schemes were formed. Usually the manufacturers join together and form producer responsibility organisations (PROs) which take the responsibility for organising the waste man
This is a representation study of the antagonist character and monstrous female vampire Drusilla from the TV-show ”Buffy the Vampire Slayer” (1997). The purpose of this study is to find out how Drusilla as an antagonist is portrayed from a feministic perspective. The theories that are used focus on monstrous female, sex, motherhood and female objectification in TV, film and literature. Using these
The global transport industry stands in front of the next big technology shift; the implementation of autonomous vehicles. This shift might remove the physical driver from the truck, increase safety and improve flexibility. This will most likely change the fundamentals of the transportation industry. Autonomous trucks are anticipated to be implemented for short distance transportation in gated are
Efforts to reform the public sectors of Zambia have been ongoing since the 1990s with objectives to ensure efficient and high-quality provision of public goods and services to all citizens and battling persistently high levels of poverty. Outcomes have however been mixed at best. This study assesses how reforms to the public sectors of Zambia have been framed in terms of what problem representati
