A5102882959- Remote Sensing in Agriculture
- Geochemistry and Geologic Mapping
- Remote-Sensing Image Classification
- Remote Sensing and Land Use
- Marine and environmental studies
- Soil and Environmental Studies
- Remote Sensing and LiDAR Applications
- Soil Geostatistics and Mapping
- Soil and Land Suitability Analysis
- Spectroscopy and Chemometric Analyses
- Atmospheric and Environmental Gas Dynamics
- Agriculture and Biological Studies
- Leaf Properties and Growth Measurement
- Mineral Processing and Grinding
- Cybersecurity and Information Systems
- Plant Water Relations and Carbon Dynamics
- Advanced Image Fusion Techniques
- Advanced Control and Stabilization in Aerospace Systems
- Botany and Plant Ecology Studies
- Geophysical Methods and Applications
- Land Use and Ecosystem Services
- Flood Risk Assessment and Management
- Climate change and permafrost
- Soil Moisture and Remote Sensing
- Light effects on plants
Space Research and Technology Institute
2014-2024
Bulgarian Academy of Sciences
2006-2024
Institute of Synthetic Polymeric Materials
2023
Max Planck Institute of Colloids and Interfaces
2012
Central Laboratory of Solar Energy and New Energy Sources
2006-2010
After the appearance of green chemistry concept, which was introduced in vocabulary early 1990s, its main statements have been continuously developed and modified. Currently, there are 10–12 cornerstones that should form basis for an ideal chemical process. This review analyzes accumulated experience achievements towards design products processes reduce or eliminate use generation hazardous substances. The presents views leading Russian scientists specializing various fields this subject,...
Abstract Nanoplasmonic biosensors based on gold nanoparticle functionalized smooth silica and porous calcium carbonate particles are presented. It is identified in this comparative study the role of porosity for adsorbing nanoparticles subsequent detection biomarkers. That further applied Detection glucose – a biomarker diabetes studied together with that bovine serum albumin very relevant bio‐molecule. Raman scattering used label‐free molecules sub‐µM–mM range capabilities, which covers...
In the coming decades, Bulgaria is expected to be affected by higher air temperatures and decreased precipitation, which will significantly increase risk of droughts, forest ecosystem degradation loss services (ES). Drought in terrestrial ecosystems characterized reduced water storage soil vegetation, affecting function landscapes ES they provide. An interdisciplinary assessment required for an accurate evaluation drought impact. this study, we introduce innovative, experimental methodology,...
Abiotic stress is responsible for a significant reduction in crop plant productivity worldwide. Ultraviolet (UV) radiation natural component of sunlight and permanent environmental stimulus. This study investigated the distinct responses young wheat einkorn plants to excessive UV-B (180 min at λmax 312 nm) following foliar pretreatment with 1 µM synthetic cytokinin 4PU-30. Results demonstrated that UV significantly amplified hydrogen peroxide levels both einkorn, exhibiting more pronounced...
Cheese is essential to the daily human diet. Rich in nutrients such as proteins and carbohydrates, it perfect environment for developing microorganisms. The study aimed screen antimicrobi¬al resistance of pathogenic microorganisms isolated from imported Bulgarian cheeses. Randomly picked isolates bacteria fungi were cultured selective differential media. Isolates identified using Crystal Gram-positives system, catalase, PYR-test, API 20 C AUX Candida. Antimicrobial susceptibility screening...
In the present work we applied a recently developed procedure for multidimensional data clustering to processing of spectral satellite images. The core our approach lays in projection image two dimensional one. main aim is discover points with similar characteristics. This was done by resulting image. technique exploits equilibrium states kind recurrent neural network - Echo state (ESN) that are obtained after intrinsic plasticity (IP) tuning ESN using as inputs. proposed previous automated...
In the present work we applied a recently developed procedure for multidimensional data clustering to multispectral satellite images. The core of our approach lays in projection image two dimensional space. For this purpose used extensively investigated family recurrent artificial neural networks (RNN) called "Echo state network" (ESN). ESN incorporates randomly generated reservoir with sigmoid nonlinearities neurons outputs. Intrinsic Plasticity (IP) that is aimed at output entropy...
In recent years on the territory of Bulgaria it has been observed existence events with extreme character – floods, forest fires, etc.- that have a negative effect ecosystems and ecosystem services. The purpose present research is application remote sensing for ecological monitoring implementation upon appearance natural hazards. this paper methodology in different temporal intervals proposed additionally results from risk assessment case induce presented. criteria implemented observing...
The development of satellite research to study the processes in near-Earth plasma requires improvement scientific equipment, measurement methods and increasing accuracy obtained data. There are actual relevant issues which worth investigation: detailed energy, momentum mass transfer critical areas solar wind - magnetosphere system; explore effects taking place earth's crust, cause earthquakes; magnetospheric-ionospheric related climate changes, etc. investigation simultaneous multicomponent...
The aim of this paper is seasonal monitoring floating reed islands dynamic in Srebarna Lake (Bulgaria), using SAR data. In order to study the (such as absolute and relative movement) only opportunity which provides high-tech methods based on space remote sensing was used. Sensors by suitable parameters for data registration type unsystematic landscape units were (Synthetic Aperture) are powerful tool from ground objects. images privileged register at any time day or night adverse weather...
Remote sensing is already an operational tool widely used in vegetation studies for ecological monitoring, change detection of natural ecosystems and agriculture crop state assessment yield prediction. A strong stress being put on the accuracy retrieved information. This requires reliable indicators plant growth physio- logical status. The development efficient means data analysis still one most essential issues. importance this issue directly related to ever-increasing amount provided by...
Remote sensing enters still wider into its application stage when the goal is to bring up-to-now investigation results an operational use. Agricultural monitoring among priorities of remote observations supplying early information on crop growth. Interest rapidly spreading over past years in hyperspectral data precision farming. In this paper, we propose and investigate performance approach for providing state assessment yield forecasts. order be obtained from remotely sensed comprised:...
The paper proposes a method for fuzzy interactive enhancement of objects identification in the image which allows identifying hidden or no defined details and images. application its difference from other techniques are shown. presents algorithm describes basic processing procedures (sampling, scaling, convolution, contrast). main parameters (increasing reduction dimensions, convolutions, brightness, thresholds contrast) demonstrated. results applied explained on an example related to...
In this paper, Haar's generalized wavelet functions are applied to the problem of ecological monitoring by method remote sensing Earth. We study Haar series and suggest use Tikhonov's regularization for investigating them correctness. solution problem, an important role is played classes that were introduced described in detail I.M. Sobol studying multidimensional quadrature formulas it contains with rapidly convergent Haar. A theorem on stability uniform convergence regularized summation...
The present study is a continuation of the previous monitoring studies on floating reed islands based remote sensing methods, but this time much more precise in order to create sustainable operating model for subsequent specific type habitats. aim movement and dynamic Srebarna Lake. This was done by creating hybrid (based optical SAR data), assessing actually condition islands, applying it quantify perform an actual seasonal habitats monitoring. To model, advantages data – Sentinel-1...
The paper proposes a methodology for developing information model or database of waste disposal sites /WDS/ landfill sites, applying received remotely and in-situ data from Earth surface monitoring, especially including procedures morphological processing, normalization visualization models. overall structure composition the model, described subsystems, classes, objects, attributes (properties) data, are presented. possibility formation new relations, that arise between different kinds...
The presented paper proposes a method for estimating parameters and characteristics of the chemical processes in large municipal landfills solid waste disposal sites according to monitoring from space. model transformations is described based on idea biochemical degradation form “transformations tree”. presentation statistical integrated equations allows us describe system "a facility" analytical form. presents main types physical (volume mass, thermal) (filtrate) which assessment could be...
One of the main issues that concerns mankind today is problem domestic waste and how it affects climate change, air pollution environment. In present work heat from disposal site tracked at various time points. The near Vidin was selected for purpose research. Optical satellite data Sentinel 2 multi-spectral instrument (MSI) synthetic – aperture radar (SAR) 1 platform Copernicus program European Space Agency were used. Landsat 5 -7 (ETM) 8 (OLI / TIRS) sensors used to calculate surface...
Abiotic stress is responsible for significant reduction in crop plant productivity worldwide. Ultraviolet (UV) radiation a natural component of sunlight and permanent environmental stimulus. This study investigated the distinct responses young wheat einkorn plants to excessive UV-B (180 min at λmax 312 nm) following foliar pretreatment with 1 µM synthetic cytokinin 4PU-30. Results demonstrated that UV significantly amplified hydrogen peroxide levels both einkorn, exhibiting more pronounced...
The possibility to obtain hollow particles using silica sol as a precursor of shell at different pH values D4 emulsion in water is studied. It shown that the yield particles, their structure and sizes strongly depend on value.
This report is devoted to the investigation of emulsion polymerization methyl methacrylate in presence PEGylated hyperbranched polymethylethoxysiloxane as an emulsifier. It shown that its use amount 1–5 wt % affords stable 25–50% poly(methyl methacrylate) dispersions with controlled particle sizes from 300 800 nm and a narrow size distribution.
The possibility of using multifunctional methylsilsesquioxane oligomers as ecologically friendly binding agents for wood chipboards is investigated. physical and mechanical properties the resulting particle boards are studied compared with those containing a formaldehyde resin binder.
Assessment and mapping of the ecosystems state in context ecosystem services that they supply are important tasks to improve human well-being, especially regions with considerable land degradation. Haskovo region is situated Southeastern part Bulgaria considered as an extremely sensitive degradation terms climate change activities result unappropriated management practices. In order conservation region, rapid available technics needed addition used analytical methods. The study presents...
The temperature of Earth's surface is one the most frequently used parameters when researching chemical and physical processes phenomena. This paper analyses changes in some waste disposal sites (WDS) on territory Bulgaria they are different according to their spatial distribution. results for points time obtained using remote sensing methods GIS. Spectral reflectance characteristics WDS evaluation these (collected through satellite data by multispectral instrument (MSI) platform Sentinel 2...