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An Abrupt Aging of Dissolved Organic Carbon in Large Arctic Rivers
(2020)Geophysical Research LettersPermafrost thaw in Arctic watersheds threatens to mobilize hitherto sequestered carbon. We examine the radiocarbon activity (F14C) of dissolved organic carbon (DOC) in the northern Mackenzie River basin. From 2003-2017, DOC-F14C signatures (1.00 ± 0.04; n=39) tracked atmospheric 14CO2, indicating export of “modern” carbon. This trend was interrupted in June 2018 by the widespread release of aged DOC (0.85 ± 0.16, n = 28) measured across ...Journal Article -
Weighing picogram aerosol droplets with an optical balance
(2020)Communications PhysicsOptical traps are used to isolate and manipulate small objects in air and liquids, enabling the thorough characterization of their properties in situ. However, no broadly applicable technique for mass measurements of optically trapped objects is currently available. Here we propose an optical balance for mass measurements of optically trapped aerosol particles. By analyzing light-induced harmonic oscillations of a particle, its mass is ...Journal Article -
Sigma models with local couplings: a new integrability-RG flow connection
(2020)Journal of High Energy PhysicsWe consider several classes of σ-models (on groups and symmetric spaces, η-models, ⋋-models) with local couplings that may depend on the 2d coordinates, e.g. on time τ. We observe that (i) starting with a classically integrable 2d σ-model, (ii) formally promoting its couplings hα to functions hα(τ) of 2d time, and (iii) demanding that the resulting time-dependent model also admits a Lax connection implies that hα(τ) must solve the 1-loop ...Journal Article -
Analysis of transcriptional modules during human fibroblast ageing
(2020)Scientific ReportsFor systematic identification of transcription signatures of human cell aging, we carried out Weighted Gene Co-expression Network Analysis (WGCNA) with the RNA-sequencing data generated with young to old human dermal fibroblasts. By relating the modules to the donor's traits, we uncovered the natural aging- and premature aging disease-associated modules. The STRING functional association networks built with the core module memberships ...Journal Article -
Proca-stinated cosmology. Part I. A N-body code for the vector Galileon
(2020)Journal of Cosmology and Astroparticle PhysicsWe investigate the nonlinear growth of large-scale structure in the generalised Proca theory, in which a self-interacting massive vector field plays the role of driving the acceleration of the cosmic expansion. Focusing to the Proca Lagrangian at cubic order—the cubic vector Galileon model—we derive the simplified equations for gravity as well as the longitudinal and transverse modes of the vector field under the weak-field and quasi-static ...Journal Article -
A simplified classification of the relative tsunami potential in swiss perialpine lakes caused by subaqueous and subaerial mass-movenments
(2020)Frontiers in Earth ScienceHistorical reports and recent studies have shown that tsunamis can also occur in lakes where they may cause large damages and casualties. Among the historical reports are many tsunamis in Swiss lakes that have been triggered both by subaerial and subaqueous mass movements (SAEMM and SAQMM). In this study, we present a simplified classification of lakes with respect to their relative tsunami potential. The classification uses basic ...Journal Article -
An Automated Open-Source Workflow for Standards-Compliant Integration of Small Animal Magnetic Resonance Imaging Data
(2020)Frontiers in NeuroinformaticsLarge-scale research integration is contingent on seamless access to data in standardized formats. Standards enable researchers to understand external experiment structures, pool results, and apply homogeneous preprocessing and analysis workflows. Particularly, they facilitate these features without the need for numerous potentially confounding compatibility add-ons. In small animal magnetic resonance imaging, an overwhelming proportion ...Journal Article -
Characterization and spontaneous induction of urinary tract Streptococcus anginosus prophages
(2020)Journal of General VirologyStreptococcus anginosus is an often overlooked and understudied emerging pathogen inhabiting many areas of the human body. Through our sequencing of S. anginosus strains isolated from the female bladder microbiota, we detected numerous prophage sequences. Bioinformatic analysis of these sequences identified 17 distinct groups of S. anginosus prophages. The majority of these phages exhibit no sequence homology to previously characterized ...Journal Article -
A partially linearized spin-mapping approach for nonadiabatic dynamics. I. Derivation of the theory
(2020)The Journal of Chemical PhysicsJournal Article -
On velocity estimations in highly aerated flows with dual-tip phase-detection probes - closure
(2021)International Journal of Multiphase FlowDual-tip phase-detection intrusive probes are the most widely used experimental technique for measuring interfacial velocities in highly aerated flows. Recently, we have introduced an adaptive window cross-correlation (AWCC) technique, which allows for the estimation of pseudo-instantaneous velocities and associated velocity statistics. Several potential limitations of this technique were suggested by Chanson (2020). In a direct response, ...Journal Article