Freie Universität Berlin

Global origins of tuna and billfish fisheries reveal the transition from coastal access to oceanic exploitation

Ocean ecosystems have played a crucial role in people’s lives around the world for millennia. However, questions persist about when, why, and how people first began removing biomass from offshore habitats and established fisheries in distant, oceanic environments. We explore the...

Higher order approximation of nonlinear SPDEs with additive space-time white noise

We consider strong approximations of 1+1-dimensional stochastic PDEs driven by additive space-time white noise. It has long been proposed (Math. Comp. 70 (2001) 121–134; Proc. R. Soc. Lond. Ser. A Math. Phys. Eng. Sci. 465 (2009) 649–667), as well as observed in simulations, that...

Electron density study on a saponin from the leaves of Panax notoginseng

Abstract The title saponin, notoginsenoside Fa, consists of a core unit of four annulated rings, a 30 atoms triterpene of steroid type and five sugar substituents, three and two at both core termini. The molecular structure thus exhibits components of different polarity, a non-po...

Grumbling through time

Abstract In this paper, we introduce an annotation scheme for other-addressed complaints, listing and exemplifying the most important parameters that emerged from our analysis of three datasets: historical correspondence data (seventeenth to nineteenth century), present-day e-mai...

All-Optical Ultrafast Pure Spin Current in the Altermagnet Cr2SO

Abstract All-optical generation of pure spin current─the flow of spin in the absence of a corresponding charge flow─relies on symmetry based compensation between the two spin channels. 2D d-wave altermagnets, which in many respects are ideal spintronic materials due to their very...

Tunable Nonlinear Landscapes in Graphene Nanoelectromechanical Systems

Abstract Nonlinear nanomechanical resonators give convenient solid-state access to classical analogs of extreme nonlinear optics and to phononic signal processing. Here we report integer harmonic generation, phononic frequency sideband comb, and reverse period-doubling dynamics i...

Access to Well-Defined Dimeric Formally Copper(III) Pyrazolates and XPS Characterization of Dicopper(III) Trifluoromethyl Complexes

Abstract Treatment of the copper(III) heterocubane [Cu(CF3)2(OH)]4 with pyrazoles under mild conditions resulted in the formation of dimeric copper(III) pyrazolates (F3C)2Cu(μ2-Pz)2Cu(CF3)2·3MeCN and (F3C)2Cu(μ2-Pz)2Cu(CF3)2·H2O. The structures of these complexes and their substi...

Fostering Attitudes and Communicative Self-Efficacy Through Structured Group Discussions on Environmental Socioscientific Issues

Group discussions enable argumentative development and are considered as a core strategy for addressing socioscientific issues (SSIs). Yet, in SSIs, students often struggle to navigate the decision-making process. This has increased interest in scaffolds that make both the proces...

Exploring the analytical limits of the indirect CO2 balancing method: A round-robin study for quantifying CH4 and NH3 emissions

Precise quantification of methane (CH 4 ) and ammonia (NH 3 ) emissions from naturally ventilated dairy barns (NVDBs) is important for climate and environmental assessment, yet the inter-laboratory reproducibility of the indirect CO 2 -balance method has not been quantified under...

Methods for inferring interaction potentials from cross-linking mass spectrometry data

Cross-linking mass spectrometry (XL-MS) has emerged as a powerful quantitative technique for probing intra-protein structural information as well as protein-protein interactions at an unprecedented scale. XL-MS data yield information on the pairwise spatial proximity of proteins...

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...

Population size modulates the transition from gene amplification-mediated heteroresistance to stable resistance

Abstract Heteroresistance is characterized by antibiotic-resistant subpopulations which can be underpinned by reversible gene duplication-amplification (GDA) of antibiotic resistance genes. It is often considered a precursor of stable resistance mutations. We investigated the evo...

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...

Spatiotemporal terahertz emission nanoscopy of spintronic photocurrent

Capturing ultrafast spin and charge photocurrents on nanoscopic scales is essential for fundamental research in physics and engineering, as well as for future applications, such as novel spin-orbitronic devices. Accessing the fundamental dynamics driven by changes in electronic e...

Charting the Road to Behemoth's Lair: F. A. Hayek's and Franz L. Neumann's Studies of Totalitarian Economic Governance

Abstract Did capitalism or socialism produce the conditions favorable to National Socialism? This question has been asked and answered since the 1930s, and the historian Benjamin Carter Hett has called the answer a “historical Rorschach test” due to its divisive nature. This arti...

Zeitenwende und öffentliche Finanzen

Zusammenfassung Was bedeutet die verteidigungspolitische Wende Deutschlands für Staatsverschuldung und Steuerlast? In diesem Beitrag bietet Giacomo Corneo einen transparenten theoretischen Rahmen, der eine Quantifizierung wesentlicher finanzpolitischer Implikationen dieser Wende...

Simulating Infrared Spectra of Matrix Isolation Experiments: What Works Best?

ABSTRACT Matrix isolation is an experimental technique which allows spectroscopists to observe highly reactive or weakly bound systems by trapping them in frozen noble gas matrices. In this work, we studied the viability of using ab initio molecular dynamics (AIMD) to simulate se...

Opening Pandora’s box: Paper mills in conference proceedings

OBJECTIVE: Paper mills are a growing threat to the integrity of science, yet their penetration in conference proceedings remains underexplored despite conferences being more important than journals in some scientific subfields. This study aims to identify papers in conference pro...

Complementary Eigen–Zundel Interpretation Reconciles Thermodynamics and Spectroscopy of Excess Protons in Aqueous HF Solutions

ABSTRACT Aqueous solutions of HF and HCl behave very differently at intermediate concentrations: HCl dissociates completely, whereas HFonly partially dissociates and forms bifluoride (). This should lead to markedly different excess‐proton spectra in HF and HCl solutions, in cont...

Conflict-Related Sexual Violence Against Males in Ukraine—First Insights on Forms, Perpetrator Characteristics, and (Non)disclosure

Background: The ongoing war in Ukraine, escalating in February 2022, has caused widespread human suffering, including displacement, civilian and military casualties, and systematic human rights violations. While conflict-related sexual violence (CRSV) is often framed as affecting...