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We use high-resolution simulations of isolated dwarf galaxies to study the physics of dark matter cusp-core transformations at the edge of galaxy formation: M200 = 107-109 M⊙. We work at a resolution (~4 pc minimum cell size; ~250 M⊙ per particle) at which the impact from individual supernovae explosions can be resolved, becoming insensitive to even large changes in our numerical 'sub-grid' parame
We use cosmological zoom-in simulations of galaxy formation in a Milky-Way-sized halo started from identical initial conditions to investigate the evolution of galaxy sizes, baryon fractions, morphologies, and angular momenta in runs with different parameters of the star formation-feedback cycle. Our fiducial model with a high local star formation efficiency, which results in efficient feedback, p
We investigate the star formation-feedback cycle in cosmological galaxy formation simulations, focusing on the progenitors of Milky Way (MW)-sized galaxies. We find that in order to reproduce key properties of the MW progenitors, such as semi-empirically derived star formation histories (SFHs) and the shape of rotation curves, our implementation of star formation and stellar feedback requires (1)
We investigate the momentum and energy budget of stellar feedback during different stages of stellar evolution, and study its impact on the interstellar medium (ISM) using simulations of local star-forming regions and galactic disks at the resolution affordable in modern cosmological zoom-in simulations. In particular, we present a novel subgrid model for the momentum injection due to radiation pr
Observations of high-redshift galaxies have revealed a multitude of large clumpy rapidly star-forming galaxies. Their formation scenario and their link to present-day spirals are still unknown. In this Letter, we perform adaptive mesh refinement simulations of disc formation in a cosmological context that are unrivalled in terms of mass and spatial resolution. We find that the so-called 'chain-gal
Svår fetma är ett svårbehandlat tillstånd och hittills har fetmakirurgi visat sig vara den metod som ger den största och mest beständiga viktminskningen över längre tid. Fetmakirurgi har tidigare endast erbjudits vuxna både i Sverige och i andra länder. Under senare år har fetmakirurgi börjat prövas som ett behandlingsalternativ till ungdomar med svår fetma där annan behandling inte har gett tillrBariatric surgery is tried out as a new treatment option for adolescents with severe obesity. Little is known about outcomes in mental health in adolescents who undergo weight loss surgery.The 3 studies in this thesis assess mental health in adolescents before, and after 4 months, 1 year and 2 years after undergoing gastric bypass. The studies are part of the Swedish national AMOS study and all ad
While previous research has demonstrated that gaze position can increase the accessibility of previous memories (Johansson & Johansson, 2014), the present study tested whether such gazes can assist in selecting target memories at the expense of competing memories. An adapted retrieval practice paradigm was used, where participants engaged in repeated selective retrieval while looking at locati
We demonstrate that pupillometry can be used to track memory interference independent of explicit responses. Pupil diameter was recordedthroughout encoding and retrieval of words from the same category over 4 trials, causing buildup of proactive interference (PI). In a contrastingcondition, the category was switched on the 4th trial, causing release from interference (RI). Pupil dilation systemati
Several studies have reported that spontaneous eye movements occur when visuospatial information is recalled from memory. Such gazes closely reflect the content and spatial relations from the original scene layout (e.g., Johansson et al., 2012). However, when someone has originally read a scene description, the memory of the physical layout of the text itself might compete with the memory of the s
This paper makes a case for using cost effectiveness (as opposed to efficiency) as key criterion when designing support policies for electricity generation from renewable energy sources in coexistence with an emissions trading scheme. Using the EU ETS and the German feed-in tariff system as examples, arguments against a stand-alone ETS are presented and necessary conditions for cost-effective supp
Objective: To determine if exercise therapy is superior to arthroscopic partial meniscectomy for knee function in middle aged patients with degenerative meniscal tears. Design: Randomised controlled superiority trial. Setting: Orthopaedic departments at two public hospitals and two physiotherapy clinics in Norway. Participants: 140 adults, mean age 49.5 years (range 35.7-59.9), with degenerative m
