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ISPY - NaCo Imaging Survey for Planets around Young stars Discovery of an M dwarf in the gap between HD193571 and its debris ring
(2019)Astronomy & AstrophysicsContext. The interaction between low-mass companions and the debris discs they reside in is still not fully understood. A debris disc can evolve due to self-stirring, a process in which planetesimals can excite their neighbours to the point of destructive collisions. In addition, the presence of a companion could further stir the disc (companion-stirring). Additional information is necessary to understand this fundamental step in the ...Journal Article -
Modelling a paleo valley glacier network using a hybrid model: an assessment with a Stokes ice flow model
(2019)Journal of GlaciologyModelling paleo-glacier networks in mountain ranges on the millennial timescales requires ice flow approximations. Hybrid models calculating ice flow by combining vertical shearing (shallow ice approximation) and longitudinal stretching (shallow shelf approximation) have been applied to model paleo-glacier networks on steep terrain, yet their validity has not yet been assessed quantitatively. Moreover, hybrid models consistently yield ...Journal Article -
Ground Truth Force Distribution for Learning-Based Tactile Sensing: A Finite Element Approach
(2019)IEEE AccessSkin-like tactile sensors provide robots with rich feedback related to the force distribution applied to their soft surface. The complexity of interpreting raw tactile information has driven the use of machine learning algorithms to convert the sensory feedback to the quantities of interest. However, the lack of ground truth sources for the entire contact force distribution has mainly limited these techniques to the sole estimation of the ...Journal Article -
No-Regret Bayesian Optimization with Unknown Hyperparameters
(2019)Journal of Machine Learning ResearchBayesian optimization (BO) based on Gaussian process models is a powerful paradigm to optimize black-box functions that are expensive to evaluate. While several BO algorithms provably converge to the global optimum of the unknown function, they assume that the hyperparameters of the kernel are known in advance. This is not the case in practice and misspecification often causes these algorithms to converge to poor local optima. In this ...Journal Article -
Monochromatic Cycle Partitions of $2$-Coloured Graphs with Minimum Degree $3n/4$
(2019)The Electronic Journal of CombinatoricsJournal Article -
Distinct Autocatalytic α- N-Methylating Precursors Expand the Borosin RiPP Family of Peptide Natural Products
(2019)Journal of the American Chemical SocietyJournal Article -
Mapping of Multiple Complementary Sex Determination Loci in a Parasitoid Wasp
(2019)Genome Biology and EvolutionSex determination has evolved in a variety of ways and can depend on environmental and genetic signals. A widespread form of genetic sex determination is haplodiploidy, where unfertilized, haploid eggs develop into males and fertilized diploid eggs into females. One of the molecular mechanisms underlying haplodiploidy in Hymenoptera, the large insect order comprising ants, bees, and wasps, is complementary sex determination (CSD). In ...Journal Article -
Enzymatic Degradation of Aromatic and Aliphatic Polyesters by P. pastoris Expressed Cutinase 1 from Thermobifida cellulosilytica
(2017)Frontiers in MicrobiologyTo study hydrolysis of aromatic and aliphatic polyesters cutinase 1 from Thermobifida cellulosilytica (Thc_Cut1) was expressed in P. pastoris. No significant differences between the expression of native Thc_Cut1 and of two glycosylation site knock out mutants (Thc_Cut1_koAsn and Thc_Cut1_koST) concerning the total extracellular protein concentration and volumetric activity were observed. Hydrolysis of poly(ethylene terephthalate) (PET) ...Journal Article -
Anisotropic Physical Properties of Mafic and Ultramafic Rocks From an Oceanic Core Complex
(2018)Geochemistry, Geophysics, GeosystemsWe analyzed the physical properties of altered mafic and ultramafic rocks drilled at the Atlantis Massif (Mid‐Atlantic Ridge, 30°N; Integrated Ocean Discovery Program Expeditions 304‐305 and 357). Our objective was to find a physical property that allows direct distinction between these lithologies using remote geophysical methods. Our data set includes the density, the porosity, P and S wave velocities, the electrical resistivity, and ...Journal Article -
Costs of plant defense priming: exposure tovolatile cues from a specialist herbivoreincreases short-term growth but reducesrhizome production in tall goldenrod(Solidago altissima)
(2019)BMC Plant BiologyBackground By sensing environmental cues indicative of pathogens or herbivores, plants can “prime” appropriate defenses and deploy faster, stronger responses to subsequent attack. Such priming presumably entails costs—else the primed state should be constitutively expressed—yet those costs remain poorly documented, in part due to a lack of studies conducted under realistic ecological conditions. We explored how defence priming in goldenrod ...Journal Article