A5006156756- Ecology and Vegetation Dynamics Studies
- Catalytic Processes in Materials Science
- Advanced Combustion Engine Technologies
- Computational Geometry and Mesh Generation
- Forest ecology and management
- Conservation, Biodiversity, and Resource Management
- Plant Water Relations and Carbon Dynamics
- Combustion and flame dynamics
- 3D Modeling in Geospatial Applications
- Forest Management and Policy
- Digital Image Processing Techniques
- Islanding Detection in Power Systems
- Vehicle emissions and performance
- Engine and Fuel Emissions
- High-Temperature Coating Behaviors
- Cultural Heritage Materials Analysis
- Aerogels and thermal insulation
- Power Transformer Diagnostics and Insulation
- Hydraulic Fracturing and Reservoir Analysis
- Particle Dynamics in Fluid Flows
- Ecosystem dynamics and resilience
- Adsorption and Cooling Systems
- Energy, Environment, and Transportation Policies
- Analytical chemistry methods development
- Biodiesel Production and Applications
Helmholtz Centre for Environmental Research
2015-2021
University of Bayreuth
2011-2019
Karlsruhe Institute of Technology
2014-2017
Fraunhofer Institute for Solar Energy Systems
2013
Abstract Deforestation in the tropics is not only responsible for direct carbon emissions but also extends forest edge wherein trees suffer increased mortality. Here we combine high-resolution (30 m) satellite maps of cover with estimates effect and show that 19% remaining area tropical forests lies within 100 m a edge. The house around 50 million fragments length world’s edges sums to nearly km. Edge effects have caused an additional 10.3 Gt (2.1–14.4 Gt) emissions, which translates into...
Large areas of tropical forests have been lost through deforestation, resulting in fragmented forest landscapes. However, the dynamics fragmentation are still unknown, especially critical edge areas, which sources carbon emissions due to increased tree mortality. We analyzed changes for entire tropics using high-resolution cover maps. found that area from 27 31% total just 10 years, with largest increase Africa. The number fragments by 20 million consequences connectivity Simulations suggest...
Forests worldwide are threatened by various environmental and anthropogenic hazards, especially tropical forests. Knowledge on the impacts of these hazards forest structure dynamics has been compiled in empirical studies. However, results studies often not sufficient for long-term projections extrapolations to large spatial scales unprecedented conditions, which require both identification understanding key underlying processes. Forest models bridge this gap incorporating multiple ecological...
Abstract Physical and chemical properties of emitted soot particles are influenced by diesel engine operating parameters. In order to find correlations between the in-cylinder processes combustion engine-out particles, parameter studies were carried out on a modern light duty production (turbo direct injection, TDI) an optically accessed single cylinder (single cylinder). Several techniques have been combined analyze process as well particles. The size TDI has determined scanning mobility...
It has been recently suggested that different 'unified theories of biodiversity and biogeography' can be characterized by three common 'minimal sufficient rules': (1) species abundance distributions follow a hollow curve, (2) show intraspecific aggregation, (3) are independently placed with respect to other species. Here, we translate these qualitative rules into quantitative framework assess if minimal indeed predict multiple macroecological patterns simultaneously.
We study the problem of computing a wind farm cabling with minimum costs allowing different cable types. Our model distinguishes levels granularity, where highest level represents for whole farm. Since even most restricted these problems is NP-hard, we introduce novel Simulated Annealing approach solving problem. While previous work focuses on few and small instances, often less than 50 turbines, our simulations show that gives good results varied benchmark set complex large-scale farms1....
The reflective properties of micro glass spheres (MGS) such as Solid Micro Glass Spheres (SMGS, “glass beads”) and Hollow (MHGS, bubbles”) are utilized in various applications, for example, retro-reflector traffic road stripe paints or facade paints. reflection behavior the can be further adapted by coating surfaces spheres, e.g., titanium dioxide a metallic coating. Such coated employed as, mid infrared (MIR)-reflective additives wall to increase thermal comfort rooms. As result, demand...
In this paper, the dynamic mechanic and optical properties of composites made Polyvinyl Butyral (PVB) Micro Glass Flakes (MGF) with matching refractive indices (RIs) are investigated. The composite is produced by a slurry-based process using additional blade casting lamination. It can be shown that high degree ordering MGF in polymer matrix achieved method. This ordering, combined platelet-like structure MGF, leads to very efficient strengthening PVB increasing content MGF. By carefully...
Abstract With an overall collection and recycling rate of 74%, the material cycle for glass packaging is well established in European Union. However, knowledge composition recycled cullet necessary to avoid creeping accumulation undesirable contaminants into cycle. Due their toxic properties, this applies particular heavy metals, example, lead. The state‐of‐the‐art technology detection lead sorting X‐ray fluorescence (XRF). lower regulatory demands, as increasingly economical hardware,...
Sintered porous yttria‐stabilized zirconia and composite ceramics with zirconium silicate are surface glazed by Laser‐Assisted Microwave Plasma Processing (LAMPP). Suitable process parameters for glazing determined those ceramics. The plasma is monitored means of pyrometry optical emission spectroscopy. In order to prove the quality characterize hot corrosion resistance, tests molten vanadium pentoxide performed. After 4 h exposure, penetration depth salt investigated as a function ceramic...