Search
Results
-
Optimizing nitrogen use efficiency of six forage grasses to reduce nitrogen loss from intensification of tropical pastures
(2024)Agriculture, Ecosystems & EnvironmentWe aimed to evaluate the effect of different types and rates of nitrogen (N) fertilizers on plant biomass production, nitrogen use efficiency (NUE), and nitrous oxide (N2O) emissions of six tropical forage grass cultivars. This field study was conducted in Colombia under tropical conditions in two phases. Phase 1: we evaluated the effect of different types of N fertilizers (urea; calcium ammonium nitrate (CAN); and urea-ammonium sulfate ...Journal Article -
Impact of carbon injection in 4H-SiC on defect formation and minority carrier lifetime
(2024)Materials Science in Semiconductor ProcessingPoint defects in silicon carbide (SiC) can act as charge carrier traps and have a pronounced impact on material properties such as the mobility and carrier lifetime. Prominent among these traps is the carbon vacancy (VC) with a demonstrated detrimental effect on the minority carrier lifetime in 4H-SiC epitaxial layers. Hence, a variety of methods for VC removal have been proposed. Common to all is that they involve some sort of C-injection ...Journal Article -
Pesticide uptake and translocation in plants monitored in situ via laser ablation dielectric barrier discharge ionization mass spectrometry imaging
(2024)Sensors and Actuators B: ChemicalFor reducing pesticide usage and enhancing the effectiveness of pest control, it is necessary to elucidate the mechanisms of pesticide uptake and translocation in plants. Here, atmospheric pressure laser ablation dielectric barrier discharge ionization mass spectrometry imaging (LA-DBDI-MSI) was used to for in-situ monitoring of pesticide uptake and translocation in plants with a spatial resolution of 25 μm, and only requiring minimal or ...Journal Article -
CO₂ fluxes contrast between aquaculture ponds and mangrove forests and its implications for coastal wetland rehabilitation in Leizhou Peninsula, China
(2024)Agriculture, Ecosystems & EnvironmentCoastal wetlands have great potential to mitigate climate change. However, in recent decades, the construction of aquaculture ponds has degraded coastal habitats, especially mangroves. Meanwhile, the lack of synchronized monitoring of carbon dioxide (CO₂) fluxes in coastal ponds and mangroves hinders the promotion of carbon neutrality target through the implementation of coastal wetland rehabilitation. To address this issue, we deployed ...Journal Article -
Greenhouse gas emissions from cattle enclosures in semi-arid sub-Saharan Africa: The case of a rangeland in South-Central Kenya
(2024)Agriculture, Ecosystems and EnvironmentExtensive livestock production in pastoral areas supports millions of livestock keepers in Sub-Saharan Africa (SSA). However, it is also linked to environmental externalities such as greenhouse gas (GHG) emissions. Corralling of livestock overnight in fenced enclosures (“bomas” in Kiswahili) is common to protect animals from theft and predation and is practiced across SSA. Boma manure is usually not removed and accumulates over years, ...Journal Article -
Extracting paleo-weathering signals from authigenic phases in lake sediments: A case-study of Lake Baikal
(2024)Chemical GeologyAuthigenic phases in lake sediments hold the potential to record changes in the isotope compositions of past lake water, potentially yielding valuable information on secular changes in continental weathering patterns and rates, including over past glacial cycles. Here, different leaching approaches are investigated with the aim of extracting Sr, Nd, Pb, and Be hosted in authigenic Fe-Mn (oxy)hydroxide sediment phases for precise isotope ...Journal Article -
On the connection between uniqueness from samples and stability in Gabor phase retrieval
(2024)Sampling Theory, Signal Processing, and Data AnalysisGabor phase retrieval is the problem of reconstructing a signal from only the magnitudes of its Gabor transform. Previous findings suggest a possible link between unique solvability of the discrete problem (recovery from measurements on a lattice) and stability of the continuous problem (recovery from measurements on an open subset of R2). In this paper, we close this gap by proving that such a link cannot be made. More precisely, we ...Journal Article -
Smart Grading: A Generative AI-Based Tool for Knowledge-Grounded Answer Evaluation in Educational Assessments
(2024)MethodsXEvaluating text-based answers obtained in educational settings or behavioral studies is time-consuming and resource-intensive. Applying novel artificial intelligence tools such as ChatGPT might support the process. Still, currently available implementations do not allow for automated and case-specific evaluations of large numbers of student answers. To counter this limitation, we developed a flexible software and user-friendly web application ...Journal Article -
Impact loading of glued laminated timber beams without finger-joints
(2024)Computers & StructuresProgressive collapse can be triggered by impact loading from vehicles or other objects and propagated by impact loading from falling debris. Therefore, the correct modeling of impact loading is necessary to assess the resistance of a structure against progressive collapse. As the number of timber buildings increases, the importance of adequate considerations of impact loading is growing. Previous research on impact loading of wood or ...Journal Article -
HV geometry for signal comparison
(2024)Quarterly of Applied MathematicsIn order to compare and interpolate signals, we investigate a Riemannian geometry on the space of signals. The metric allows discontinuous signals and measures both horizontal (thus providing many benefits of the Wasserstein metric) and vertical deformations. Moreover, it allows for signed signals, which overcomes the main deficiency of optimal transportation-based metrics in signal processing. We characterize the metric properties of the ...Journal Article