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The impact of agent definitions and interactions on multiagent learning for coordination in traffic management domains
(2020)Autonomous Agents and Multi-Agent SystemsThe state-action space of an individual agent in a multiagent team fundamentally dictates how the individual interacts with the rest of the team. Thus, how an agent is defined in the context of its domain has a significant effect on team performance when learning to coordinate. In this work we explore the trade-offs associated with these design choices, for example, having fewer agents in the team that individually are able to process and ...Journal Article -
Exploring actors' perceptions of the precision agriculture innovation system – A Group Concept Mapping approach in Germany and Switzerland
(2023)Technological Forecasting and Social ChangePrecision Agriculture Technologies (PATs) promise to enhance productivity and foster sustainability. However, attempts to explain the low adoption of PATs, particularly in Europe, lack attention to the role of shared understanding of PATs among actors in the development and diffusion of this innovation. To uncover what could guide the emergence of a collective understanding of PATs, we explore how the actors comprising the nascent innovation ...Journal Article -
Temperature distribution in a gas-solid fixed bed probed by rapid magnetic resonance imaging
(2023)Chemical Engineering ScienceControlling the temperature distribution inside catalytic fixed bed reactors is crucial for yield optimization and process stability. Yet, in situ temperature measurements with spatial and temporal resolution are still challenging. In this work, we perform temperature measurements in a cylindrical fixed bed reactor by combining the capabilities of real-time magnetic resonance imaging (MRI) with the temperature-dependent proton resonance ...Journal Article -
Temporal variations of carbon and water fluxes in a subtropical mangrove forest: Insights from a decade-long eddy covariance measurement
(2023)Agricultural and Forest MeteorologyMangroves, highly efficient ecosystems in sequestering CO2, are strongly impacted by climate change. The lack of long-term observation in mangroves hinders the evaluation of seasonal and inter-annual variability in carbon and water fluxes and their responses to various environmental drivers. In this study, we measured net ecosystem CO2 exchange and evapotranspiration between the atmosphere and subtropical mangroves using the eddy covariance ...Journal Article -
Networking the forest infrastructure towards near real-time monitoring - A white paper
(2023)Science of The Total EnvironmentForests account for nearly 90 % of the world's terrestrial biomass in the form of carbon and they support 80 % of the global biodiversity. To understand the underlying forest dynamics, we need a long-term but also relatively high-frequency, networked monitoring system, as traditionally used in meteorology or hydrology. While there are numerous existing forest monitoring sites, particularly in temperate regions, the resulting data streams ...Journal Article -
Towards monitoring stem growth phenology from space with high resolution satellite data
(2023)Agricultural and Forest MeteorologyRadial stem growth is a key ecosystem process resulting in long-term carbon sequestration. Despite recognition of its importance to global carbon cycling, high uncertainties remain regarding how radial growth phenology (e.g., the onset, mid, and cessation of radial growth) will be affected by climate change. In this study, we evaluated to what extent high spatially (3 × 3 m) and temporally (up to daily) resolved satellite imagery from ...Journal Article -
Predominant contributions through lichen and fine litter to litterfall mercury deposition in a subalpine forest
(2023)Environmental ResearchLitterfall, typically referring to needles/leaves, may stand for >50% of the total mercury (Hg) deposition in forest ecosystems. By detailed categorisation, we reveal for the first time that the contributions through lichens and fine litter, together 9.98 μg Hg m−2 yr−1, could be as high as that in needle litter (9.96 μg m−2 yr−1) to the annual total Hg deposition (44.6 μg m−2 yr−1) in a subalpine forest in Switzerland. Noticeably, needle ...Journal Article -
Animal-associated marine Acidobacteria with a rich natural-product repertoire
(2023)ChemSponges are well known as rich sources of bioactive natural products. Various studies suggest that many of these compounds are produced by symbiotic bacteria. However, substance supplies and functional insights about the producers remain limited because cultivation remains unsuccessful. To identify alternative, sustainable sources of sponge-derived polyketides, we computationally analyzed 5,289 characterized and orphan trans-acyltransferase ...Journal Article -
Effects of the debate on glyphosate's carcinogenic risk on pesticide producers' share prices
(2023)Ecological EconomicsWe analyze the impact of the glyphosate controversy in the European Union in the period 2015–2017 on share prices of pesticides producing companies. Following an event study approach, we use daily stock market data for nine pesticide producers to identify the impact of eight regulatory events on companies' stock returns from 2015 until 2017. More specifically, we examine whether and how i) public announcements of assessments of glyphosate's ...Journal Article -
Onset of Multiferroicity in Prototypical Single-Spin Cycloid BiFeO₃ Thin Films
(2023)Nano LettersIn the room-temperature magnetoelectric multiferroic BiFeO3, the noncollinear antiferromagnetic state is coupled to the ferroelectric order, opening applications for low-power electric-field-controlled magnetic devices. While several strategies have been explored to simplify the ferroelectric landscape, here we directly stabilize a single-domain ferroelectric and spin cycloid state in epitaxial BiFeO3 (111) thin films grown on orthorhombic ...Journal Article