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The Gaia -ESO Survey : Double-, triple-, and quadruple-line spectroscopic binary candidates

Context. The Gaia-ESO Survey (GES) is a large spectroscopic survey that provides a unique opportunity to study the distribution of spectroscopic multiple systems among different populations of the Galaxy. Aims. Our aim is to detect binarity/multiplicity for stars targeted by the GES from the analysis of the cross-correlation functions (CCFs) of the GES spectra with spectral templates. Methods. We

The GALAH survey : The data reduction pipeline

We present the data reduction procedures being used by the GALactic Archeology with Hermes (GALAH) survey, carried out with the HERMES fibre-fed, multi-object spectrograph on the 3.9-m Anglo-Australian Telescope. GALAH is a unique survey, targeting 1 million stars brighter than magnitude V = 14 at a resolution of 28 000 with a goal to measure the abundances of 29 elements. Such a large number of h

Approximate integrals of motion

We determine approximate numerical integrals of motion of 2D symmetric Hamiltonian systems. We detail for a few gravitational potentials the conditions under which quasi-integrals are obtained as polynomial series. We show that each of these potentials has a wide range of regular orbits that are accurately modelled with a unique approximate integral of motion.

Digitalisering och AI inom familjejuridiken

Allt högre krav ställs på juristbranschen att bli digital – kanske särskilt på aktörer som erbjuder familjerättslig rådgivning – där banker och andra organisationer än de klassiska byråerna tar allt större mark och påskyndar utvecklingen. Titti Mattsson och Lotta Dahlstrand diskuterar hur juristbranschen och juristrollen påverkas av digitaliseringen och användandet av artificiell intelligens (AI)

Characterising the temporal evolution of fixation in human post mortem brain via linear relaxometry modelling – a marker of cross-linking?

MRI-based biophysical models are typically validated by comparison to ex-vivo histology of fixed tissue. The fixation process itself and the accompanied autolysis processes strongly modify tissue composition, and lead to MR signal changes, making the validation of biophysical models for in vivo MRI particularly challenging. To better understand the temporal evolution of the fixation process within

Magnetization transfer (MT) of human brain at 7T in the context of a 3D multi-parameter mapping protocol

3D multi-gradient echo MRI can be used to estimate T1, T2*, PD and the magnetization transfer (MT), which is increasingly used for multi-parametricmapping (MPM) of human brain. The increased polarization at 7T compared to lower B0 allows for increased spatial resolution or reduced scantimes. However, SAR restrictions imposed on the MT pulse and B1 inhomogeneity pose challenges. In this work, we pr

Removing bias and increasing dynamic range in DREAM flip angle mapping at 7T

DREAM is an ultra-fast multi-slice B1+-mapping technique based on the single-shot STEAM sequence. To study noise and bias related to slice-profiles, DREAM B1+-maps at 3.75 mm resolution were acquired at 7T in phantoms and in human brain with nominal flip angles (FA) between 20° and 90° of the two STEAM preparation pulses. B1+ was decreasing at actual FAs above 50°; noise became apparent at actual

Non-negative least squares fitting of multi-exponential T2 decay data: Are we able to accurately measure the fraction of myelin water?

The ability to determine the myelin water fraction (MWF) in vivo is essential to assessments of neurodevelopmental myelination and myelin damage in neurodegenerative diseases. The analysis of multi-exponential T2 decay data relies on the non-negative-least-squares (NNLS) fitting, which may be sensitive to the chosen fitting parameters. We performed simulations to explore the outcomes of NNLS under

Towards the modelling of pedestrian wind speed using high-resolution digital surface models and statistical methods

Wind is a complex phenomenon and a critical fac-tor in assessing climatic conditions and pedestrian comfortwithin cities. To obtain spatial information on near-groundwind speed, 3D computational fluid dynamics (CFD) model-ling is often used. This is a computationally intensive methodwhich requires extensive computer resources and is time con-suming. By using a simpler 2D method, larger areas can b

Using MODIS derived fPAR with ground based flux tower measurements to derive the light use efficiency for two Canadian peatlands

We used satellite remote sensing data; fractionof photosynthetically active radiation absorbed by vegetation(fPAR) from the Moderate Resolution Imaging Spectrora-diometer (MODIS) in combination with tower eddy covari-ance and meteorological measurements to characterise theLight Use Efficiency parameter (ε)variability and the maxi-mumε(εmax)for two contrasting Canadian peatlands. Eight-day MODISfPA

Utmaning eller tillgång? Att undervisa modersmålstalare i språkutbildning på universitetet

I språkutbildning vid svenska lärosäten finns det vanligtvis ett antal studenter i varje grupp som har det studerade språket som modersmål (L1), även om majoriteten utgörs av studerande som läser språket som främmande språk (L2). I vår studie undersöker vi erfarenheter av att undervisa denna typ av grupp genom semistrukturerade intervjuer med sex universitetslärare i franska, spanska och tyska. Un

Cytokines induce an epithelial cell cytokine response

Intravesical inoculation of gram negative bacteria or isolated bacterial products into mice induces an IL-6 response which can be measured within miutes of the infection.1,2 In such infections, IL-6 is initially detected in the urine and subsequently in the serum. Similar IL-6 responses were found in human patients deliberately colonized in the urinary tract with E. coli Hu7343. IL-6 was secreted

Different populations of CD11b + dendritic cells drive Th2 responses in the small intestine and colon

T-helper 2 (Th2) cell responses defend against parasites. Although dendritic cells (DCs) are vital for the induction of T-cell responses, the DC subpopulations that induce Th2 cells in the intestine are unidentified. Here we show that intestinal Th2 responses against Trichuris muris worms and Schistosoma mansoni eggs do not develop in mice with IRF-4-deficient DCs (IRF-4f/f CD11c-cre). Adoptive tr

Chapter 40 - Lymphocyte Trafficking to Mucosal Tissues

Lymphocytes are the key cells of the adaptive immune system that provide antigen-specific responses tailored to the context of antigen exposure. Through cytokine release and antibody production, lymphocytes orchestrate and amplify the recruitment and function of other immune cells and contribute to host defense against invading pathogens and the pathogenesis of many inflammatory diseases. Lymphocy