A5009364453- Landslides and related hazards
- Chalcogenide Semiconductor Thin Films
- Laser Material Processing Techniques
- Cryospheric studies and observations
- Flood Risk Assessment and Management
- Anomaly Detection Techniques and Applications
- Advanced Surface Polishing Techniques
- Winter Sports Injuries and Performance
- Rock Mechanics and Modeling
- Silicon and Solar Cell Technologies
- earthquake and tectonic studies
- Climate change and permafrost
- Dam Engineering and Safety
- Groundwater flow and contamination studies
- Quantum Dots Synthesis And Properties
- Hydraulic Fracturing and Reservoir Analysis
- Drilling and Well Engineering
- Silicon Nanostructures and Photoluminescence
- Fire effects on ecosystems
- Metal and Thin Film Mechanics
- Thin-Film Transistor Technologies
- Fecal contamination and water quality
- Laser Design and Applications
- Fluid Dynamics Simulations and Interactions
- Semiconductor materials and devices
University Hospital in Halle
2025
Technische Universität Berlin
2000-2024
Institute of Geology and Geophysics
2016-2018
Chinese Academy of Sciences
2016-2017
RWTH Aachen University
2010-2015
Heinrich Heine University Düsseldorf
2013
Center for Physical Sciences and Technology
2010
Leibniz Institute of Surface Engineering
1998-2006
Ferdinand-Braun-Institut
2002-2003
Leibniz Institute for Neurobiology
1999-2002
Abstract As population pressure keeps increasing, productive land in sub‐Saharan Africa (SSA) is becoming increasingly scarce, while soil fertility research SSA shifting its focus away from production per se towards sustainable production. The vital role of spatial and temporal scales their heterogeneity highlighted this paper. Spatial variation nutrient stocks shown for agro‐ecological zones classification units East West Africa, but also at the farm level lower levels. Whereas researchers...
This paper reviews the classical and some particular factors contributing to earthquake-triggered landslide activity. analysis should help predict more accurately event sizes, both in terms of potential numbers affected area. It also highlights that occurrences, especially those very far from hypocentre/activated fault, cannot be predicted by state-of-the-art methods. Particular attention will paid effects deep focal earthquakes Central Asia other extremely distant activations regions world...
Granite is a typical crystalline material, often used as building but also candidate host rock for the repository of high-level radioactive waste. The petrographic texture-including mineral constituents, grain shape, size, and distribution-controls fracture initiation, propagation, coalescence within granitic rocks. In this paper, experimental laboratory tests numerical simulations grain-based approach in two-dimensional Particle Flow Code (PFC2D) were conducted on mechanical strength...
Hydraulic fracturing is a useful tool for enhancing rock mass permeability shale gas development, enhanced geothermal systems, and geological carbon sequestration by the high-pressure injection of fluid into tight reservoir rocks. Although significant advances have been made in hydraulic theory, experiments, numerical modeling, when it comes to complexity conditions knowledge still limited. Mechanisms injection-induced fracture initiation propagation should be better understood take full...
Attributing seismic or climatic landslide triggers in retrospect is an unresolved problem science. Particularly areas with scarce and rainfall records the case of delayed slope response to earthquakes it often difficult identify trigger. Understanding trigger mechanism however essential for tailoring risk reduction measures.We here present approach coupling geotechnical Factor Safety (FS) Newmark Displacement (ND) methods k-means clustering unsupervised machine learning technique reveal...
Purpose To evaluate if bovine enamel and dentin are appropriate substitutes for the respective human hard tooth tissues to test shear bond strength (SBS) fracture analysis. Materials Methods 80 sound caries-free erupted third molars freshly extracted permanent central incisors (10 specimens each group) were used investigate dentine adhesion of one 2-step self-etch (SE) 3-step etch rinse (E&R) product. SBS buccal or labial areas ground plane obtain areas. SE E&R applied was measured prior...
Hydraulic fracturing technology is usually used to stimulate tight gas reservoirs for increasing production. The stimulated volume depends in part on the pre-existing natural fractures a reservoir. mechanisms influencing interaction between hydraulic and have be well understood order achieve successful application of fracturing. In this paper, simulations were performed based two-dimensional Particle Flow Code with an embedded Smooth Joint Model investigate interactions compare these against...
Abstract. First analyses of landslide distribution and triggering factors are presented for the region affected by 14 August 2021 earthquake (Mw=7.2) in Nippes Department, Haiti. Landslide mapping was mainly carried out comparing pre- post-event remote imagery (∼0.5–1 m resolution) available on Google Earth Pro® Sentinel-2 (10 satellite images. The first covered about 50 % (for before completion map January 2022), latter were selected to cover entire potentially zone. On basis completed...
Abstract The broad energy distributions of the condensing particles typically encountered in ion assisted vapor deposition techniques are often a drawback when attempting to understand effect energetic bombardment on film properties. In current study, monoenergetic Al + beam generated by filtered cathodic arc discharge is employed for alumina (Al 2 O 3 ) films at well defined energies between 4 eV and 200 substrate temperature 720 °C. Structural analysis shows that 40 or larger favor...
Hafnium oxynitride films are deposited from a Hf target employing direct current magnetron sputtering in an Ar–O2–N2 atmosphere. It is shown that the presence of N2 allows for stabilization transition zone between metallic and compound mode enabling deposition at well defined conditions coverage by varying O2 partial pressure. Plasma analysis reveals this experimental strategy facilitates control over flux O− ions which generated on oxidized surface accelerated negative potential toward...