Humboldt-Universität zu Berlin

Galerkin error reduction and eigenvalue localisation for conforming FEM

Abstract The reduction factor $$\varrho $$ ϱ in a Galerkin scheme with conforming $$P_1$$ P 1 finite element spaces on simplicial meshes is the maximal quotient of the Galerkin errors in the $$L^2$$ L 2 norm divided by the energy norm (the $$H^1$$ H 1 semi-norm) for the Poisson m...

STAT3 operates as an inflammation-dependent transcriptional switch in antiviral NK cells

The immune system integrates signals to regulate immune responses, forming complex context-dependent networks where identical cues produce distinct outcomes. Signal transducer and activator of transcription (STAT) transcription factors convert cytokine receptor engagement into tr...

Uncertainty-Aware Tidal Disruption Event Classification : A Host-Agnostic Probabilistic Random Forest Approach

Abstract The classification of Tidal Disruption Events in large-scale photometric surveys is challenging because deterministic machine learning models produce overconfident misclassifications under varying data quality and low signal-to-noise conditions. Existing lightcurve-based...

A composite, host‐participatory haustorium links host compatibility to defence bifurcation in Alectra vogelii (Orobanchaceae)

Societal Impact Statement Parasitic weeds of the family Orobanchaceae are among the most damaging constraints on food production in the tropics, draining water and nutrients from their hosts and threatening the livelihoods of millions of smallholder farmers. Yellow witchweed ( Al...

How volant seabirds benefit from sub-surface predators during multi-predator feeding aggregations

Abstract Multi-predator feeding aggregations are common in marine ecosystems and frequently involve seabirds. Often labelled opportunistic ‘scroungers’, volant seabirds derive diverse benefits from the association with sub-surface predators (such as cetaceans, pinnipeds, Teleosts...

A GPRC5B–Fyn signaling axis regulates VRAC activity by targeting LRRC8A

The mechanisms by which physiological signals gate the volume-regulated anion channel (VRAC) remain poorly understood. Here, we identify a GPRC5B–Fyn signaling axis that directly controls VRAC activation by targeting the essential subunit LRRC8A. We found that the orphan G protei...

Bartnik's splitting conjecture with the null energy condition

Abstract Bartnik conjecture is one of the prime open conjectures in mathematical relativity. There are many approaches to this conjecture that use (Lorentzian) conformal geometry. In this article, we show that if we replace the strong energy condition in Bartnik's splitting conje...

High‐Density Magnetomyography With Optical Magnetometers Reveals Spatiotemporal Patterns of Evoked Muscle Activity

ABSTRACT Magnetomyography (MMG) holds great potential as a contactless alternative to electromyography (EMG). However, the spatiotemporal dynamics of the myomagnetic field in vivo remain largely unknown, limiting signal interpretability and hence the use of MMG. Here, the myomagn...

Multi-predator feeding aggregations in pelagic waters

Abstract Multi-predator feeding aggregations (MPFAs) are temporary co-occurrences of several species of predators simultaneously exploiting the same prey resource. Pelagic waters are home to the largest and most diverse MPFAs on the planet, however, our knowledge of the mechanism...

Nothing new to see here?! A critical (visual) discourse analysis of climate (im)mobility in IOM documents

This paper revisits critical climate mobility literature that explores the role of images and visual materials within policy briefs and papers, published about a decade ago, to contrast those findings with present-day policy documents. Based on a discourse analysis of 10 recent I...

The presence of mahi-mahi at multi-predator feeding aggregations modifies striped marlin attack behaviour

Abstract Terrestrial multi-species predator feeding aggregations (MPFAs) are characterized by contest competition, but scramble competition is likely more common at MPFAs in pelagic waters. However, empirical investigations are rare. Aerial video was used to estimate abundances o...

Spectral tuning and signaling of diverse and far red–sensitive rhodopsins in mantis shrimp eyes

Stomatopod crustaceans (mantis shrimps) have extraordinary eyes with unmatched visual rhodopsin diversity, but their potential for broad color detection remains unclear. Here, we report that 17 rhodopsins, mostly from the midband eye region, are involved in color sensing and func...

TCR sensitivity shapes recognition of tumor antigen presented by host cells and TCR-T cell efficacy in solid tumors

Despite advances in adoptive T cell therapy, therapeutic efficacy in solid tumors remains inconsistent, and the mechanistic determinants of treatment failure are incompletely understood. Increasing evidence suggests that effective antitumor responses depend not only on direct rec...

Structure versus regularity of set-valued maps in convex generalized Nash equilibrium problems in Banach spaces

A generalized Nash equilibrium problem (GNEP) in Banach space consists of 𝑁 > 1 optimal control problems with couplings in both the objective functions and, most importantly, in the feasible sets. We address the existence of equilibria for convex GNEPs in Banach space. We show th...

Leaning left: how turn bias and habitat complexity shape spatial cognition in a coral-reef fish

Abstract In coral reef ecosystems, anthropogenic change is rapidly altering habitat structure, but the consequences for fish cognition remain poorly understood. We tested whether structural habitat complexity influences spatial learning and strategy use in the humbug damselfish (...

Towards data-driven refinement of an automated cluster alert system: assessing the concordance of epidemiological expert assessment and genotyping

Abstract Objective: An automated CLuster AleRt system (CLAR) is employed at our hospital to detect clusters of relevant microorganisms. Alerts are subsequently assessed by infection prevention and control (IPC) experts to determine their epidemiological relevance. This study comp...

Horizons, landscapes, grounds and worlds: an integrated information environments framework

Purpose This paper addresses a theoretical gap in understanding geographic mobility in information practices by proposing an integrated spatial framework. It examines how place and mobility shape information access among vehicle residents by connecting four place-based, spatially...

A multiregional serosurvey of RNA virus-reactive antibodies in bats and rodents reveals the enzootic presence of flavi- and paramyxoviruses in African Pteropodidae

Bats and rodents have been identified as reservoir hosts of diverse RNA viruses that pose potential risks to humans. However, overall virus prevalence in wildlife and underlying factors determining the zoonotic potential of reservoir-borne viruses remain poorly characterized. Vir...

Measurement properties of instruments for post-extubation dysphagia in critically ill patients: A systematic review

OBJECTIVES: Post-extubation dysphagia (PED) is a common but often under-recognised complication in critically ill patients following invasive mechanical ventilation. Systematic assessment of PED in routine ICU practice is not common. This systematic review aimed to identify clini...

Is There an Association Between Preoperative PONV Prophylaxis With Dexamethasone and Incidence of Wound Revisions in the Surgical Treatment of Pediatric Secondary Scoliosis? A Retrospective Cross-Sectional Study in 162 Patients

BACKGROUND DATA: Pediatric patients undergoing surgery for secondary scoliosis are at special risk for surgical site infections (SSIs). The application of dexamethasone (Dexa) for perioperative prophylaxis of postoperative nausea and vomiting is an established method. Despite the...