G. P. Kayukova, А. Н. Михайлова, N. M. Khasanova, В. П. Морозов, Аlexey V. Vakhin, Nafis A. Nazimov, O. S. Sotnikov, Р С Хисамов,
... of organic matters from carbonate rock samples of Dankov-Lebedyan deposits of Zelenogorskaya area and siliceous-carbonate ... at 350°С and in carbonate rocks of Dankov-Lebedyan horizon at 600°С. This indicates different ...
Tópico(s): Geological Studies and Exploration
2018 - Hindawi Publishing Corporation | Geofluids
P. Gospodinov, D. Dankov, V. Roussinov, Stefan Stefanov, Michail D. Todorov, Christo I. Christov,
... Icon Cite Search Site Citation P. Gospodinov, D. Dankov, V. Roussinov, S. Stefanov; Stationary Cylindrical Couette Flow ...
Tópico(s): Geomagnetism and Paleomagnetism Studies
2011 - American Institute of Physics | AIP conference proceedings
Boyan Bontchev, Albena Antonova, Valentina Terzieva, Yavor Dankov,
Climate resilience competencies improve people’s capacity to recognize and adopt strategies for mitigating negative climate effects. Especially concerning the built cultural heritage protection in the coastal areas, both professionals and citizens have to be prepared for water-related extreme events, such as floods, sea-level rise, and altered precipitation. Considering these challenges, the authors explore the efficiency of serious video games and describe the process of design and validation of ...
Tópico(s): Virtual Reality Applications and Impacts
2021 - Multidisciplinary Digital Publishing Institute | Sustainability
Praveen Kumar Sharma, Navneet Gupta, Plamen I. Dankov,
In this paper, a complete analysis of the complex dielectric constant of a flexible substrate from the silicon-based polymer- Polydimethylsiloxane (PDMS) is performed, and the obtained results are discussed. Two experimental methods are applied in this research. The first Two-resonator method is based on resonance measurements by excitation of two types of TE- and TM-mode cylinder resonators with PDMS disks, ensure an accurate determination of the dielectric constant and dielectric loss tangent in ...
Tópico(s): Dielectric materials and actuators
2021 - IEEE Sensors Council | IEEE Sensors Journal
Supriya Srivastav, Asen Dankov, Mujo Adanalic, Roland Grzeschik, Vi Tran, Sibylle Pagel‐Wieder, Frank Gessler, Ingo Spreitzer, Tatjana Scholz, Barbara S. Schnierle, Olympia E. Anastasiou, Ulf Dittmer, Sebastian Schlücker,
As an immune response to COVID-19 infection, patients develop SARS-CoV-2-specific IgM/IgG antibodies. Here, we compare the performance of a conventional lateral flow assay (LFA) with a surface-enhanced Raman scattering (SERS)-based LFA test for the detection of SARS-CoV-2-specific IgM/IgG in sera of COVID-19 patients. Sensitive detection of IgM might enable early serological diagnosis of acute infections. Rapid detection in serum using a custom-built SERS reader is at least an order of magnitude more ...
Tópico(s): SARS-CoV-2 and COVID-19 Research
2021 - American Chemical Society | Analytical Chemistry
Praveen Kumar Sharma, Navneet Gupta, Plamen I. Dankov,
In this paper, a flexible silicon-based elastomer Polydimethylsiloxane (PDMS) is characterized experimentally. For the characterization of the dielectric properties of PDMS, two experimental methods are applied. The first method is based on resonance measurements by the two-resonator method. This method allows the determination of the dielectric constant εr and dielectric loss tangent tanδεr of non-metallized samples in both parallel and perpendicular directions. The obtained values for the dielectric ...
Tópico(s): Advanced Antenna and Metasurface Technologies
2020 - Elsevier BV | AEU - International Journal of Electronics and Communications
S. Dimitrova, Momchil Paunov, Bojidara Pavlova, Kolyo Dankov, Margarita Kouzmanova, Violeta Velikova, Tsonko Tsonev, Hazem M. Kalaji, Vasilij Goltsev,
Plane (Platanus orientalis) is a popular park tree in Europe but is almost extinct in natural ecosystems, because of climate changes. In our study, two ecotypes of plane tree (Bulgarian and Italian) were submitted to moderately elevated temperature that occurs in summer. Our aim was to compare stress reactions, tolerance, and adaptability of these plants. Leaf age had a significant impact on the stress effects. For correct interpretation of the results, we investigated leaves at different positions ...
Tópico(s): Plant Water Relations and Carbon Dynamics
2020 - Institute of Experimental Botany of the Czech Academy of Sciences | Photosynthetica
Boyan Bontchev, Albena Antonova, Yavor Dankov,
Educational video games are considered interactive, user-oriented, and motivating learning instruments, allowing delivery of tailored learning experiences. Designing and implementing adaptive and personalized educational video games can become a suitable tool for teachers in student-centric learning. In this context, the present research aims to outline how mini puzzle games adaptable to the individual learner and proactive learning scenarios can help teachers to adopt enhanced strategies for game- ...
Tópico(s): Teaching and Learning Programming
2020 - Springer Science+Business Media | Lecture notes in computer science
Zuzana Dankov�, Dušan Bran�, Dana Dvorsk�, Marcela Ňachajov�, R Fiolka, Mari�n Grend�r, Jozef Hatok, Peter Kubatka, Veronika Holubekov�, Erika Halašov�, Tibor Bielik, Pavol Ž�bor,
Endometrial carcinoma is one of the most common tumours in developed countries. In addition to the active role of genetic factors, epigenetic changes also have an important effect. The present study analysed the methylation status of kruppel like factor 4 (KLF4) and heparan sulfate‑glucosamine 3‑sulfotransferase 2 (HS3ST2) genes in three endometrial tissue types for carcinoma prediction. The sample comprised 91 women with histologically‑confirmed endometrial carcinoma (64.16±9.64 years old), 36 women ...
Tópico(s): Cancer-related gene regulation
2018 - Spandidos Publishing | International Journal of Molecular Medicine
G. P. Kayukova, А. Н. Михайлова, I. P. Kosachev, Nafis A. Nazimov, O. S. Sotnikov, Alexander Evdokimov, Р С Хисамов,
Tópico(s): Petroleum Processing and Analysis
2018 - Springer Science+Business Media | Chemistry and Technology of Fuels and Oils
Hazem M. Kalaji, Wojciech Bąba, Krzysztof Gediga, Vasilij Goltsev, Izabela A. Samborska, Magdalena D. Cetner, S. Dimitrova, Urszula Piszcz, Krzysztof Bielecki, Kamila Karmowska, Kolyo Dankov, Agnieszka Kompała‐Bąba,
In natural conditions, plants growth and development depends on environmental conditions, including the availability of micro- and macroelements in the soil. Nutrient status should thus be examined not by establishing the effects of single nutrient deficiencies on the physiological state of the plant but by combinations of them. Differences in the nutrient content significantly affect the photochemical process of photosynthesis therefore playing a crucial role in plants growth and development. In ...
Tópico(s): Leaf Properties and Growth Measurement
2017 - Springer Science+Business Media | Photosynthesis Research
Sashka Krumova, Miroslava Zhiponova, Kolyo Dankov, Violeta Velikova, Konstantin Balashev, Tonya Andreeva, Eugenia Russinova, Stefka G. Taneva,
Brassinosteroids (BRs) are plant steroid hormones known to positively affect photosynthesis. In this work we investigated the architecture and function of photosynthetic membranes in mature Arabidopsis rosettes of BR gain-of-function (overexpressing the BR receptor BR INSENSITIVE 1 (BRI1), BRI1OE) and loss-of-function (bri1-116 with inactive BRI1 receptor, and constitutive photomorphogenesis and dwarfism (cpd) deficient in BR biosynthesis) mutants. Data from atomic force microscopy, circular dichroism, ...
Tópico(s): Plant Molecular Biology Research
2013 - Elsevier BV | Journal of Photochemistry and Photobiology B Biology
Kolyo Dankov, Mira Busheva, D. Stefanov, Emilia Apostolova,
Fluridone, an inhibitor of the carotenoid biosynthesis, was used to study the relationship between the degree of carotenoid depletion and the function of the photosynthetic apparatus. The data reveal that, at a small reduction of the carotenoid content (25% decrease of the total carotenoids), the PSII and PSI (oxidation of P700 by far-red light) photochemistry is not influenced, while the oxygen evolution is strongly inhibited. Further reduction of the total carotenoid content (more than 40%) leads ...
Tópico(s): Algal biology and biofuel production
2009 - Elsevier BV | Journal of Photochemistry and Photobiology B Biology
S. Sabchevski, I. Zhelyazkov, E. Benova, V. Atanassov, Plamen I. Dankov, M. Thumm, A. Arnold, J. Jin, T. Rzesnicki,
Quasi-optical (QO) mode converters are used to transform electromagnetic waves of complex structure and polarization generated in gyrotron cavities into a linearly polarized, Gaussian-like beam suitable for transmission. The efficiency of this conversion as well as the maintenance of low level of diffraction losses are crucial for the implementation of powerful gyrotrons as radiation sources for electron-cyclotron-resonance heating of fusion plasmas. The use of adequate physical models, efficient ...
Tópico(s): Particle accelerators and beam dynamics
2006 - IOP Publishing | Journal of Physics Conference Series
A two-resonator method, based on TE/sub 011/-mode and TM/sub 010/-mode resonance cavities with a multilayer disk sample, has been developed for measurements of the longitudinal and transversal dielectric constant and dielectric loss tangent of each layer (if the other ones have known parameters) or in the whole sample averaging over the layers contribution. Dispersion equations for the considered modes in both types of cavities with three-, two-, or one-layer samples are obtained. The measurement ...
Tópico(s): Acoustic Wave Resonator Technologies
2006 - IEEE Microwave Theory and Techniques Society | IEEE Transactions on Microwave Theory and Techniques
... F.C. J. Chem.-Phys. 63, 3812 (1975) Dankov, P. D. Izv., Sektora fiz.-chim. analis, Ionch ...
Tópico(s): X-ray Diffraction in Crystallography
1982 - Wiley | Crystal Research and Technology
... Faraday Soc. 36, 472 (1940). 6 P. D. Dankov, N. A. Shishakov and D. V. Ignatov, Electronographic ...
Tópico(s): Water Quality Monitoring and Analysis
1969 - Wiley | physica status solidi (b)
Valentina Terzieva, Boyan Bontchev, Yavor Dankov, Elena Paunova-Hubenova,
Personalized learning has gained in popularity over the past decade. It provides learners with learning resources that comply with their characteristics and preferences or offers them tasks and quizzes adapted to their performance. This research presents how we apply this concept to an educational video maze game created and generated on the APOGEE platform. In particular, this article explores the following three research questions: (1) Which characteristics in the student’s model should be considered ...
Tópico(s): Artificial Intelligence in Games
2022 - Multidisciplinary Digital Publishing Institute | Sustainability
An incredible amount of data has constantly been generated. There is a gap between the abundance of data and the needs of users. At the same time a particular user needs not only a relevant part of the available data but (s)he needs higher-level (inferred) data in order to use this data in support of decision-making. Analytics comes to bridge that gap, by means of tools. Those tools link what the user needs to what is available as data; generate higher-level (inferred) data based on the raw data; provide ...
Tópico(s): Time Series Analysis and Forecasting
2018 - Springer Science+Business Media | Lecture notes in business information processing
Kolyo Dankov, Anelia G. Dobrikova, Bettina Ughy, Balázs Bogos, Zoltán Gombos, Emilia Apostolova,
Pulse-amplitude-modulated (PAM) chlorophyll fluorescence and photosynthetic oxygen evolution were used to investigate the role of the different amount and organization of light-harvesting complexes of photosystem II (LHCII) in four pea species on the susceptibility of the photosynthetic apparatus to high-light treatment. In this work we analyzed the thylakoid membrane lipid composition of the studied pea plants. A relationship between the structural organization of LHCII proteins, the amount of the ...
Tópico(s): Light effects on plants
2011 - Elsevier BV | Plant Physiology and Biochemistry
Yavor Dankov, Boyan Bontchev, Valentina Terzieva,
Designing and creating educational video games is very complex, time-consuming, and expensive. For applying game-based learning in mass, teachers and educators need software platforms and tools for an easy and straightforward design and construction of games for learning. Therefore, the growing need for such software instruments suitable for non-ICT specialists for supporting the video game creation processes is a popular research subject. This paper presents software tools that assist educators ...
Tópico(s): Augmented Reality Applications
2021 - Springer International Publishing | Lecture notes in networks and systems
А. Л. Куренков, O. A. Klochkova, V. A. Zmanovskaya, Il'ya V. Fal'kovskiy, Vladimir Kenis, Lyudmila N. Vladykina, Diana Krasavina, A. S. Nosko, Л. В. Рычкова, Х. М. Каримова, Б. И. Бурсагова, Leyla S. Namazova-Baranova, A. M. Mamedyarov, Л. М. Кузенкова, O. G. Dontzov, M. A. Ryzhenkov, М. Н. Буторина, Olga Pavlova, N. N. Harlamova, D. M. Dankov, Е. В. Левитина, Dmitry Popkov, Sergey Ryabykh, С. Н. Медведева, Е. Б. Губина, Oleg Agranovich, Tatiana Ilinichna Kiseleva, О. Н. Васильева, В П Зыков, Viktor Mihnovich, T.A. Belogorova Belogorova,
Spasticity treatment is one of the key aspects of the contemporary cerebral palsy (CP) rehabilitation that influences on the effectiveness of other methods. The paper presents the first Russian document that unites the recommendations for the BTA treatment of CP and could be used as the guideline for the multilevel injections. The Russian consensus on the multilevel botulinum toxin A (BTA) treatment of spastic CP is based on the international data and the results of national studies. The authors describe ...
Tópico(s): Stroke Rehabilitation and Recovery
2016 - Media Sphera Publishing Group | S S Korsakov Journal of Neurology and Psychiatry
Emilia Apostolova, I. Pouneva, Georgi D. Rashkov, Kolyo Dankov, Irena Grigorova, Amarendra Narayan Misra,
Tópico(s): Light effects on plants
2014 - Springer Science+Business Media | Indian Journal of Plant Physiology
Yavor Dankov, Albena Antonova, Boyan Bontchev,
Video games for education still remain unpopular educational resources and tools for learning. One of the reasons is that teachers do not understand the efficiency of video games for learning. In this perspective, the game assessment reports such as scores, points, and statistics have to provide meaningful information not only to players but as well to teachers and lecturers who have to assess and evaluate the learning outcomes. Considering the user-centered design approach, the present research ...
Tópico(s): Teaching and Learning Programming
2021 - Springer International Publishing | Lecture notes in networks and systems
The use of educational video games in the learning process and the benefits to consumers have been the subject of research and interest in many current studies. The APOGEE (smArt adaPtive videO GamEs for Education) online platform for the generation of educational video games tries to automatize the overall process of game design, creation, deployment, application, and game session analysis and visualization and the platform is going to include various software instruments automatizing the workflow ...
Tópico(s): Artificial Intelligence in Games
2021 - Springer Nature | Advances in intelligent systems and computing
Plamen I. Dankov, Praveen Kumar Sharma, Navneet Gupta,
The simultaneous influences of the substrate anisotropy and substrate bending are numerically and experimentally investigated in this paper for planar resonators on flexible textile and polymer substrates. The pure bending effect has been examined by the help of well-selected flexible isotropic substrates. The origin of the anisotropy (direction-depended dielectric constant) of the woven textile fabrics has been numerically and then experimentally verified by two authorship methods described in the ...
Tópico(s): Microwave Engineering and Waveguides
2020 - Multidisciplinary Digital Publishing Institute | Sensors
P. Gospodinov, D. Dankov, V. Roussinov,
The heat transfer in a monatomic rarefied gas between two concentric cylinders in the case of sudden change of the outer wall temperature is studied. Different cases were calculated for a set of radius and temperatures of outer cylinder. On the wall of the inner cylinder are used two types of thermal boundary conditions - constant temperature and adiabatic isolated inner cylinder. The study aims to determine effect of arising waves on the gas macro characteristics (density, temperature and pressure) ...
Tópico(s): Radiative Heat Transfer Studies
2016 - American Institute of Physics | AIP conference proceedings
Yavor Dankov, Andjela Dankova,
This paper focuses on educational video games with a thematic orientation related to conserving and preserving Cultural Heritage (CH). Educational video games are effective and contemporary tools for influencing and educating users. Not only the educational content is integrated into these games, but they also embody the pedagogical and moral messages of the educator, which are transmitted to the learners in an entertainment game. This paper proposes a classification of educational video games in ...
Tópico(s): Educational Games and Gamification
2023 - | Digital Presentation and Preservation of Cultural and Scientific Heritage
Albena Antonova, Yavor Dankov,
Information technologies continuously transform the educational landscape, while the dynamic labour market expects fresh graduates and talents ready for the fast-changing job requirements. Smart services, defined as da-ta-enabled and contextualized digital services, can propose new models for learning personalization and adaptation. However, the teachers proved to be essential in introducing the needed changes in the educational system. The present research aims to outline the role of smart services ...
Tópico(s): Digital Transformation in Industry
2023 - Springer International Publishing | Lecture notes in networks and systems
Technology-enhanced learning applies more and more educational video games for increasing students’ motivation and engagement, for achieving better learning outcomes. This paper presents the designed functionalities of several software instruments created as analytics and visualization tools for analysing and evaluating both learning and playing outcomes of the player with different knowledge, learning goals, preferences, and learning style. This paper is based on previous publications of the authors ...
Tópico(s): Artificial Intelligence in Games
2021 - Springer Nature | Advances in intelligent systems and computing