Brandenburg University of Technology Cottbus-Senftenberg

Land use intensification results in abrupt transitions between extensively and intensively managed grasslands

Abstract Understanding whether land use intensification causes regime shifts (i.e. persistent, large changes in ecosystem states) is of key importance for management, particularly if these shifts occur abruptly as thresholds in land use intensity are crossed. Further, these thres...

Convection in a fluid layer driven by internal dielectric heating

This study investigates the convective behaviour of two dielectric fluids with different Prandtl numbers under microgravity, each of which is confined between two parallel electrodes at a given temperature, and subjected to internal dielectric heating. Three-dimensional direct nu...

Methanol — flexible energy and carbon vector for the achievement of the dual goals of decarbonization & carbon circularity

In a world with geopolitical conflicts and uncertainties, numerous import-dependent nations are facing a dilemma in achieving a parallel carbon transition from (1) fossils to renewables, (2) a linear to a circular carbon economy, and (3) reliance on imported to domestic carbon re...

Surrogate‐Assisted Nonlinear Model Predictive Control for a Lambda Robot

ABSTRACT This work presents a nonlinear model predictive control (NMPC) framework for a lambda‐shaped parallel robot that incorporates data‐driven surrogates to facilitate control design. An inverse surrogate model is used to provide an efficient initialization of the control inp...

Investigating the persistence of iron-bound phosphorus in lake sediment under sulfidic conditions

Abstract Iron (Fe) additions are widely used to suppress internal phosphorus (P) loading in eutrophic lakes by promoting the formation of vivianite (Fe(II) 3 (PO 4 ) 2 ·8H 2 O), a redox-stable Fe–P mineral that can sequester P in anoxic sediments over the long term. However, vivi...

On-wafer 16-term calibration approach for dual-setup, bias-dependent RF characterization of scaled InP HBTs

Abstract In this article, indium phosphide heterojunction bipolar transistors measured at two different measurement setups are characterized by systematic comparison of the 16-term corrected and conventional 8-term multiline Thru-Reflect-Line (mTRL) corrected scattering parameter...

Beyond Ce–U Charge Transfer: Strain and Polarons in Epitaxial Ce1– x U x O2(111)

Abstract The redox chemistry of mixed ceria-based oxides is commonly interpreted in terms of direct charge transfer between neighboring cations. In the Ce1–xUxO2 system, this corresponds to the oxidation of U4+ into U5+ accompanied by the reduction of Ce4+ into Ce3+. In this work...

Site-specific controls predominate over erosion effects on nitrogen turnover: Evidence from 15N tracing in the field

Understanding how nitrogen (N) cycling is affected by soil erosion is essential to optimize N supply for crops and reduce losses in hilly fields. While topography-related impacts on N availability and losses have been studied, the mechanisms linking erosion to N transformation dy...

Complementary, not competing: passive acoustic monitoring and point counts reveal different facets of bird communities in agricultural landscapes

Reliable, scalable monitoring of declining bird communities is essential for evaluating conservation management. We compared species richness and community composition derived from passive acoustic monitoring (PAM) with those from traditional point counts in 11 winter wheat field...

Seasonal and interannual variability of atmospheric ammonia over Guatemala driven by land use, biomass burning, and meteorological circulation

Abstract. Ammonia (NH3) is a key atmospheric precursor of fine particulate matter and a marker of agricultural and biomass burning emissions. In Central America, NH3 variability remains largely unquantified. This study presents the first integrated spatiotemporal assessment of at...

Cost-effectiveness of centralized versus decentralized decision-making in agri-environment schemes for biodiversity conservation: Insights from an ecological-economic model

The cost-effectiveness of agri-environment schemes (AES) depends, among other things, on spatial dimensions. Extensive research has been conducted on how to incentivize habitat connectedness, but far less attention has been given to how the spatial level of decision-making affect...

Mixed volumes of zonoids and the absolute value of the Grassmannian

Abstract Zonoids are Hausdorff limits of zonotopes, while zonotopes are convex polytopes defined as the Minkowski sums of finitely many segments. We present a combinatorial framework that links the study of mixed volumes of zonoids (a topic that has applications in algebraic comb...

Can parent–child interactions help reduce socioeconomic differences in language development? Results of a German birth cohort study

Abstract Aim Children from socioeconomically disadvantaged families often have lower developmental outcomes than their socioeconomically more advantaged peers. In early childhood, language development (LD) in particular is a key competence for further socialization. There is a ne...

Qalb: Largest State-of-the-Art Urdu Large Language Model for 230M Speakers with Systematic Continued Pre-Training

Despite remarkable progress in large language models, Urdua language spoken by over 230 million people remains critically underrepresented in modern NLP systems. Existing multilingual models demonstrate poor performance on Urdu-specific tasks, struggling with the language’s compl...

Contrasting eruptive dynamics and hazards of two Holocene andesitic sub-Plinian to Plinian eruptions, Lower and Upper Citlaltépetl, at Pico de Orizaba, Mexico

Abstract Pico de Orizaba (Citlaltépetl) stratovolcano, eastern Mexico, preserves a complex Holocene explosive record, yet the eruptive dynamics, source parameters, styles, and hazard implications of individual eruptive episodes remain poorly constrained. Here, we examine the 9600...

Biomarkers of systemic disease burden and outcomes after transcatheter tricuspid edge-to-edge repair

Abstract Background Risk stratification after transcatheter tricuspid edge-to-edge repair (T-TEER) remains challenging, particularly in patients with advanced right-sided heart failure and systemic disease burden. Biomarkers reflecting inflammation, stress response and multiorgan...