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Context. The Gaia satellite will observe about one billion stars and other point-like sources. The astrometric core solution will determine the astrometric parameters (position, parallax, and proper motion) for a subset of these sources, using a global solution approach which must also include a large number of parameters for the satellite attitude and optical instrument. The accurate and efficien
The origin of two large peaks in the atmospheric radiocarbon ((14)C) concentration at AD 774/5 and 993/4 is still debated. There is consensus, however, that these features can only be explained by an increase in the atmospheric (14)C production rate due to an extraterrestrial event. Here we provide evidence that these peaks were most likely produced by extreme solar events, based on several new an
In this review, we analyze several types of graphene-based sensors for glucose detection with respect to their preparation, properties and efficiency in electro-chemical processes. Graphene may display different types of defects, which play a role in the electron transfer processes. Oxygenated groups on the edges of graphene planes reduce the graphene in-plane conductivity, but may enhance the het
In this article we propose a modification of the recently introduced divergence information criterion (DIC, Mattheou et al., 2009) for the determination of the order of an autoregressive process and show that it is an asymptotically unbiased estimator of the expected overall discrepancy, a nonnegative quantity that measures the distance between the true unknown model and a fitted approximating mod
A search for a fermiophobic Higgs boson using diphoton events produced in proton-proton collisions at a centre-of-mass energy of root s = 7 TeV is performed using data corresponding to an integrated luminosity of 4.9 fb(-1) collected by the ATLAS experiment at the Large Hadron Collider. A specific benchmark model is considered where all the fermion couplings to the Higgs boson are set to zero and
This review summarises the evidence for the treatment of displaced fractures of the femoral neck in elderly patients. Results from randomised clinical trials and national register studies are presented when available. The advantages of arthroplasty compared with internal fixation are supported by several studies. A number of studies contribute to the discussions of total hip arthroplasty (THA) ver
The aim of this research paper is to explore how, and to what extent, the WIPO Marrakesh Treaty addresses the issue of restricted access to copyrighted materials by persons with visual impairments while securing legitimate interests and human rights of the central stakeholders; specifically, copyright rightholders and persons with visual impairments. In doing so, the focus centres on the compromis
Organizational identity has been mostly researched through a managerial perspective, where employees are given a secondary role. This thesis approaches identity from a dynamic perspective and explores how librarian identity is enacted in daily interactions between librarians and patrons, whilst considering any implications for the organization. The research focuses on a single case where participa
I uppsatsen undersöker jag juridiska överväganden kopplade till balansen mellan en personlig assistents anställningsskydd och rätten till självbestämmande för assistansanvändaren, dvs. personen med funktionsnedsättning. Yrket som personlig assistent innebär ett nära samspel mellan assistansanvändaren och den personliga assistenten. I många fall är en hälsosam yrkesrelation en förutsättning för såvIn this thesis I examine legal considerations concerning the balance between employment protection for personal assistants and self-determination for the service user, i.e. the person with a disability. Personal assistance as a profession entails a close relationship between the service user and the personal assistant. In many cases, a healthy relationship is a condition for the wellbeing of the p
Activation measures were implemented as a condition for social assistance in Sweden in the 1990s. Generally, the goal has been to promote the transition from welfare to work and to(re)integrate people dependent on social assistance into the labour market. Social assistance is regulated by the Social Services Act, which is a framework law that gives municipalities and individual social workers exte
The principle of fiscal neutrality is the essence of the EU VAT system. It aims at relieving taxable persons of the burden of VAT through the deduction mechanism provided for by the VAT Directive. In its another aspect, the principle is a means of reflecting the equal treatment of taxable persons. The equal treatment of taxable persons ensures that taxable persons in a comparable situation are not
Simulations of large detectors such as the ATLAS detector at the LHC (Large Hadron Collider) are compute-intensive projects, and are according to current internal estimates expected to be consuming 40 % of the total ATLAS CPU resources in 2020, creating a need for software optimization strategies. We investigate build configurations of the Geant4 simulation software to find if a) a performance imp
We give a short overview of the theory of the muon anomalous magnetic moment with emphasis on the hadronic light-by-light and the pion loop contribution. We explain the difference between the hidden local symmetry and full VMD pion loop and discuss leading logarithms in the anomalous sector of 2-flavour chiral perturbation theory.
Physical activity is associated with lower risks of developing dementia, Parkinson’s disease (PD) and depression. Furthermore, being physically active prior to brain ischemia appears to help the recovery process. However, previous studies do not differentiate between the two most common forms of dementia, Alzheimer’s disease (AD) and vascular dementia (VaD), when it comes to the association betwee
This thesis is an attempt to discuss the proposals to improve the statuses and rights of the legally resident third country nationals living in the European Union. As denizens, third country nationals have full civil and social rights but they do not have any political rights. This is believed to denote an anomaly, which can be corrected through the grant of political rights. However, political ri
