Sökresultat

A measurement of W boson production in lead-lead collisions at root s(NN) = 2.76 TeV is presented. It is based on the analysis of data collected with the ATLAS detector at the LHC in 2011 corresponding to an integrated luminosity of 0.14 nb(-1) and 0.15 nb(-1) in the muon and electron decay channels, respectively. The differential production yields and lepton charge asymmetry are each measured as

The maintenance of steam turbines is expensive, particularly if dismantling is required. A concept for the provision Of Support for the maintenance engineer in determining steam turbine status in relation to the recommended maintenance interval is presented here. The concept embodies an artificial neural network which is conditioned to recognise patterns known to be related to faults. The faults S

High-spin states in I-123 have been populated in the Se-80(Ca-48, p4n) I-123 reaction at 207 MeV and gamma-ray coincidence events have been recorded with the Gammasphere spectrometer. The level scheme of I-123 has been extended up to spin I = 63/2. The nucleus undergoes a shape transition from moderately deformed states with collective rotation at low spins to noncollective oblate configurations a

Over the past few decades, significant social and economic transformations had a relevant correspondence in processes of territorial complexification, urban fragmentation and spatial injustice. Literature and research shows that these processes have also a very important temporal dimension, associated to a transition from an industrial society of synchronized rhythms to more heterogeneous everyday

We review the African Monsoon Multidisciplinary Analysis (AMMA) model inter-comparison activities for West Africa. The Model Inter-comparison Project is an evaluation exercise of how global and regional atmospheric models represent seasonal and intra-seasonal variations of the climate and rainfall over the Sahel. The Land surface Model Inter-comparison Project in turn focuses on modelling critical

The volume presents the results of an international project carried out in cooperation between the Uppsala University, the Hebrew University in Jerusalem, Lund University and the University of Gothenburg. The questions put forward in the project were: How is hypotaxis marked in Semitic, other than by conjunctions? How does this affect the organization of texts? More specifically, what constitutes

Under seeing limited conditions very high resolution spectroscopy becomes very difficult for extremely large telescopes (ELTs). Using adaptive optics (AO) the stellar image size decreases proportional with the telescope diameter. This makes the spectrograph optics and hence its resolution independent of the telescope diameter. However AO for use with ELTs at visible wavelengths require deformable

Lightweight floors are often troubled by poor impact-sound insulation. In order to develop and explain structures with acceptable insulation, a deterministic prediction model was developed. The paper considers transmission through the system and the response of the model. Excitation (as caused by the ISO-tapping machine) is considered in a separate paper [1]. The system description employs a spati

The positive effects of foreign direct investments have encouraged several developing countries to offer preferential treatment of foreign investors. In addition to creating employment opportunities, it is argued that one of the most important contributions of foreign direct investments is the transfer of skills and knowledge i.e. spillover effects. While several studies have measured these spillo

"The aim of this thesis is to study the implied volatility on certain warrants on the Nordic Derivatives Exchange and compare it to an EGARCH-forecasted volatility (which throughout the thesis is used as proxy for the true volatility by the authors) in order to see if the difference follows a specific pattern." The difference between the forecasted volatility and the implied volatility f