Search results

Instabilities in planetary systems can result in the ejection of planets from their host system, resulting in free-floating planets (FFPs). If this occurs in a star cluster, the FFP may remain bound to the star cluster for some time and interact with the other cluster members until it is ejected. Here, we use N-body simulations to characterize close star-planet and planet-planet encounters and the

We use N-body simulations of star cluster evolution to explore the hypothesis that short-lived radioactive isotopes found in meteorites, such as Al-26, were delivered to the Sun's protoplanetary disc from a supernova at the epoch of Solar system formation. We cover a range of star cluster formation parameter space and model both clusters with primordial substructure and those with smooth profiles.

For studies of Galactic evolution, the accurate characterization of stars in terms of their evolutionary stage and population membership is of fundamental importance. A standard approach relies on extracting this information from stellar evolution models but requires the effective temperature, surface gravity and metallicity of a star obtained by independent means. In previous work, we determined

OBJECTIVE: The objective of the study was to estimate the risk for postoperative adhesions and intestinal obstruction after cesarean delivery and to estimate whether the rate remains stable over time. STUDY DESIGN: Women who had the aforementioned diagnoses in the Swedish Hospital Discharge Registry were linked to the Swedish Medical Birth Registry. Women with diagnoses increasing the risk for adh

Background: Photoallergic contact dermatitis (PACD) is an uncommon condition, and there is a lack of validated criteria for its diagnosis. Objective: To identify a set of relevant criteria to be considered when suspecting a diagnosis of PACD and to assess the reproducibility of these criteria. Methods: This was a diagnostic item selection and reliability study performed between July 2012 and Octob

Two-photon laser-induced fluorescence for detection of carbon monoxide (CO) frequently shows interferences by emission from photolytically produced C-2 radicals encountered under fuel-rich combustion conditions. Reduced C-2 interference for excitation with laser pulses in the picosecond regime is here demonstrated by comparison with excitation using nanosecond pulses for measurements in laminar pr

Members of the transforming growth factor (TGF)-beta family play pivotal roles in the control of differentiation, proliferation and tolerance in peripheral T cells. Recently, they have been implicated in thymic selection, but their role is so far not well characterized. In the present study, we demonstrate that specific thymocyte populations are under the influence of either the TGF-beta and/or Ac

Purpose: The purpose of this thesis is to analyze the fossilization in language acquisition of Italian of two Swedish learners. I intend to use the Processability Theory and the Theory of gradual construction of italian verbs of the Pavia project. I also intend to investigate the sources of linguistic input of the learners . Methodology: I have recorded two learners as they speak and based on th

After the fall of the Berlin Wall in 1989 the satellite states of the former Communist bloc immediately departed on a journey towards democracy and market capitalism. Among the many tasks of the newly elected governments, one was to transform the paternalist Communist welfare state into a social system that would decrease the oversized role of the state, at the same time as protecting the citizens

Title: Learning to read music notation on the guitar ? an analysis of various guitar schools on the market with added own examples. Purpose: To analyse currently available teaching materials on the subject of guitar notation on the market. A comparative analysis is made of five chosen books on the topic. Four criteria for the analysis of these five books are stated: 1) Structure and progression of

Dissemination of risk information is ubiquitous in contemporary society. We explore how individuals react in everyday life to health-risk information, based on what they report in personal interviews. Health-risk information was without exception recognized as unstable and inconsistent. This conformity, however, did not extend to the narratives regarding how health-risk information should be handl

The reduction mechanism of the RuO2(110) surface by molecular hydrogen exposure is unraveled to an unprecedented level by a combination of temperature programmed reaction, scanning tunneling microscopy, high-resolution core level shift spectroscopy, and density functional theory calculations. We demonstrate that even at room temperature hydrogen exposure to the RuO2(110) surface leads to the forma

This paper suggests that the Payne models should not properly be regarded as the traffic flow analog of the Navier-Stokes equations of fluid dynamics. Further, the Chapman-Enskog asymptotic expansion in a small parameter is shown to lead to an alternate class of models that seem to have a more legitimate claim to that distinction. Details of this expansion, about the stable-flow equilibria of the

Solar steam turbines are subject to high thermal stresses as a result of temperature gradients during transient operation, which occurs more frequently due to the variability of the solar resource. In order to increase the flexibility of the turbines while preserving lifing requirements, several operational modifications for maintaining turbine temperatures during offline periods are proposed and

The Baltic Sea Region is rapidly becoming one of the world’s more competitive regions. The region is capitalising on its strengths and making the most of its diversity to stimulate innovation, build a strong pool of skilled labour and foster entrepreneurship. A deep spirit of co-operation and integration has led the Baltic Sea countries to set up ambitious governance frameworks to pursue economic

We reportwhat is to our knowledge the first production of gain by inner-shell photoionization of ions. Photoionization of 4d electrons from In$+$ ions created a population inversion on a 185-nm In2$+$ transition. This scheme is an isoelectronic scaling of the 442-nm Cd$+$ laser. A single-pass gain constant of 0.9 {\textpm} 0.3 cm{\textminus}1 over a 0.4-cm path was pumped by soft x rays generated

Popular Abstract in Swedish I denna avhandling har jag studerat jordlöparnas (Carabidae) dynamik i de intensivt brukade landskapen som återfinns i Skånes slättbygd. Jordlöpare är en artrik familj av rovlevande skalbaggar som är vanligt förekommande i jordbruksmark. De livnär sig på en mängd olika insekter, andra leddjur och blötdjur, som t.ex. skadedjur såsom bladlöss eller kålflugans ägg. För attIn this thesis I have focused on studying dynamics of ground beetle assemblages in intensively managed agricultural landscapes. By definition, the land cover of these landscapes is dominated by annually tilled farmland, comprising a range of different crop types, in the context of the southern Swedish province of Scania mostly winter wheat, spring barley, winter rapeseed, and sugar beets. This bac

We apply causal loop diagrams (CLD) to picture how complex societal scenarios can be understood in terms of interdependent drivers and mechanisms between actors from the public and private sectors respectively. And we show how un-sustainable scenarios can be understood in terms of insufficient balancing feed-back in the system. We apply the methodology to picture such imbalances as funda- mental d