A5030495237- Marine and environmental studies
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Electric Power Systems and Control
- Atmospheric and Environmental Gas Dynamics
- Coastal and Marine Dynamics
- Electric Motor Design and Analysis
- Computer Graphics and Visualization Techniques
- Marine and fisheries research
- Wireless Sensor Networks for Data Analysis
- Sensorless Control of Electric Motors
- Sensor Technology and Measurement Systems
- Maritime and Coastal Archaeology
- Aquatic and Environmental Studies
- Electric and Hybrid Vehicle Technologies
- Elevator Systems and Control
- Medical Image Segmentation Techniques
- Marine Ecology and Invasive Species
- earthquake and tectonic studies
- Coastal and Marine Management
- Engine and Fuel Emissions
- Geological Studies and Exploration
- Belt Conveyor Systems Engineering
- Risk Management in Financial Firms
Bulgarian Academy of Sciences
1997-2024
Institute of Oceanology
2006-2023
Technical University of Gabrovo
2013-2023
Hellenic Centre for Marine Research
2021
Institute of Biodiversity and Ecosystem Research
2021
Centre for Advanced Study
2021
Austrian Academy of Sciences
1998-2005
Kettering University
2003
Institute of Marine Geology and Geophysics
1994
Abstract Geological methane, generated by microbial decay and the thermogenic breakdown of organic matter, migrates towards surface (seabed) to be trapped in reservoirs, sequestered gas hydrates or escape through natural seeps mud volcanoes (via ebullition). The total annual geological contribution atmosphere is estimated as 16–40 Terragrammes (Tg) methane; much this flux ‘fossil’ origin. Emissions are affected conditions (particularly extent ice sheets permafrost), eustatic sea‐level ocean...
Abstract After the Last Glacial Maximum, semi‐land‐locked Black Sea basin was flooded by warm water from Mediterranean Sea. This major sea level rise and change of physical properties had a large impact on gas hydrate reservoir in sediments below. Modelling regional response stability zone (GHSZ) to flooding 7100 years ago shows that strong effect near‐bottom temperature increase pushes shrinking 15–62% may release up 1.1–4.6 Gt methane. catastrophic scenario is, however, delayed because...
Coastal sand dunes are amongst the world’s most sensitive and dynamic landforms. Unfortunately, during last thirty years, heavy anthropogenic alterations have been observed, encompassing greater part of Bulgarian Black Sea coast (BBSC), which has changed land-sea interactions significantly. As a consequence, depositional shrunk to 131 km or 25% aggregate shoreline length. Although our research reveals that 86% BBSC included in Natura 2000 network protected sites established under Habitats...
ockmarks were discovered for the first time in SE of Bulgarian Black Sea zone 1988. Echo sounder and shallow seismic data analyses investigations conducted before after 1988, allow main pockmark area to be enlarged given more details. A total 305 pockmarks have been located within an than 100 km2 (2-5 km wide 41 long). The bottom is covered with Holocene soft silty clay. following trends are defined when moving from northern part southern part: 1) increase seabed sediments thickness 2.5 m...
Reducing energy consumption and efficient use of electricity are critically important conditions for sustainable economic growth environmental protection. High-power motors usually one the largest power consumers.The frequency inverters reduces substantially directly impacts on environment through lower carbon dioxide other greenhouse gas emissions from plants. Paper deals with evaluation combined influence supply voltage values electric losses different initial resisting moment in a...
Terra Nova, 23, 56–61, 2011 Abstract Authigenic carbonates at methane seeps provide valuable information on the evolution of seepage dynamics. In this study, we report an unusual type 13 C‐depleted [δ C: −44.8‰ to −8.3‰V‐PDB (Vienna PeeDee Belemnite)] calcite‐cemented grapestone concretion composed small spheroidal nodules, <0.1–15 cm across, associated with ancient seep setting in Eocene marine sediments (Pobiti Kamani area, NE Bulgaria). Field observations suggest that nodules started...
Nowadays, the search for ways to increase efficiency of electric vehicles is particularly relevant. However, ultimately, purpose mobility is, besides ecology, be as cheap possible. As with conventional cars, cost directly related power. Everything in an car subject maximum energy savings. A condition development use suitably designed motors a driving component electromechanical system. At present, induction are mainly used better and due their known advantages. The motor, research, suitable...
Concentrations of a large set major and trace elements, Sr, Nd Pb isotope ratios were measured in Holocene sediments cored the western deep Black Sea order to unravel: (1) controls element enrichment, (2) sources detrital component. The transition basin from oxic euxinic resulted enrichment or depletion number elements deep-sea sediments. Authigenic Fe appears depend on amount mobilized sediment through benthic redox shuttle mechanism free H2S water column (degree "euxinization"). Manganese...
Nowadays, the acquisition of very high resolution (VHR) imagery guarantees an excellent quality coastal topographic surveys and monitoring. Alongside rapid progress remote sensing, digital photogrammetry image processing data obtained by unmanned aerial vehicles (UAVs) provides outstanding opportunities for VHR mapping zone, including coverage difficult-to-access areas. Till previous two years, Bulgarian coast was "intact" this modern technology regularly surveyed to detect analyze ongoing...