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Search Results: 1 - 10 of 401646 matches for " Valeriy M. Petrenko "
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Constitution of the Lymphatic System
Valeriy M. Petrenko, PhD, ScD
International Journal of BioMedicine , 2012,
Abstract: The lymphatic system consists of two types segments – general (systemic or periarterial) and special (own, intervalvular). The segments organize all the system’s reactions in response to its environmental influences. This paper presents the results of the research the common structure of all the sections of the lymphatic bed.
PROBE OF CONVOY LORRY’S ROADABILITY ON MODEL WITH FOUR FREEDOM DEGREES
M. Dyachuk,D.?Petrenko
Аvtomob?lnyi Transport , 2009,
Abstract: The modeling of curvilinear movement of the lorry convoy is considered. The mathematical model of movement of two links flat system is developed; the software in the language of technical computing MATLAB is created; results of movement modeling on an example of jointed structure MAZ-643008 + NEFAZ-96931 taking into account distribution of steered wheels rotation angles and elastic properties of tires of wheels are analyzed.
Coherent uncertainty analysis of aerosol measurements from multiple satellite sensors
M. Petrenko,C. Ichoku
Atmospheric Chemistry and Physics Discussions , 2013, DOI: 10.5194/acpd-13-4637-2013
Abstract: Aerosol retrievals from multiple spaceborne sensors, including MODIS (on Terra and Aqua), MISR, OMI, POLDER, CALIOP, and SeaWiFS – altogether, a total of 11 different aerosol products – were comparatively analyzed using data collocated with ground-based aerosol observations from the Aerosol Robotic Network (AERONET) stations within the Multi-sensor Aerosol Products Sampling System (MAPSS, http://giovanni.gsfc.nasa.gov/mapss/ and http://giovanni.gsfc.nasa.gov/aerostat/). The analysis was performed by comparing quality-screened satellite aerosol optical depth or thickness (AOD or AOT) retrievals during 2006–2010 to available collocated AERONET measurements globally, regionally, and seasonally, and deriving a number of statistical measures of accuracy. We used a robust statistical approach to detect and remove possible outliers in the collocated data that can bias the results of the analysis. Overall, the proportion of outliers in each of the quality-screened AOD products was within 12%. Squared correlation coefficient (R2) values of the satellite AOD retrievals relative to AERONET exceeded 0.6, with R2 for most of the products exceeding 0.7 over land and 0.8 over ocean. Root mean square error (RMSE) values for most of the AOD products were within 0.15 over land and 0.09 over ocean. We have been able to generate global maps showing regions where the different products present advantages over the others, as well as the relative performance of each product over different landcover types. It was observed that while MODIS, MISR, and SeaWiFS provide accurate retrievals over most of the landcover types, multi-angle capabilities make MISR the only sensor to retrieve reliable AOD over barren and snow/ice surfaces. Likewise, active sensing enables CALIOP to retrieve aerosol properties over bright-surface shrublands more accurately than the other sensors, while POLDER, which is the only one of the sensors capable of measuring polarized aerosols, outperforms other sensors in certain smoke-dominated regions, including broadleaf evergreens in Brazil and South-East Asia.
Dynamic Geometry Environments as a Tool for Computer Modeling in the System of Modern Mathematics Education
Rushan Ziatdinov,Valeriy M. Rakuta
European Journal of Contemporary Education , 2012,
Abstract: This paper discusses a number of issues and problems associated with the use of computer models in the study of geometry in university, as well as school mathematics in order to improve its efficiency. We show that one of the efficient ways to solve a number of problems in nowadays mathematics education is to use dynamic geometry environment GeoGebra. We also provide some examples of computer models created with GeoGebra.
Mathematical Modeling of Crown Forest Fire Spread  [PDF]
Valeriy Perminov
Open Journal of Forestry (OJF) , 2012, DOI: 10.4236/ojf.2012.21003
Abstract: Mathematical model of forest fire was based on an analysis of known experimental data and using concept and methods from reactive media mechanics. In this paper the assignment and theoretical investigations of the problems of crown forest fire spread in windy condition were carried out. In this context, a study—mathematical modeling—of the conditions of forest fire spreading that would make it possible to obtain a detailed picture of the change in the temperature and component concentration fields with time, and determine as well as the limiting condition of fire propagation in forest with fire break.
Multi-sensor Aerosol Products Sampling System (MAPSS)
M. Petrenko, C. Ichoku,G. Leptoukh
Atmospheric Measurement Techniques (AMT) & Discussions (AMTD) , 2012,
Abstract: Global and local properties of atmospheric aerosols have been extensively observed and measured using both spaceborne and ground-based instruments, especially during the last decade. Unique properties retrieved by the different instruments contribute to an unprecedented availability of the most complete set of complimentary aerosol measurements ever acquired. However, some of these measurements remain underutilized, largely due to the complexities involved in analyzing them synergistically. To characterize the inconsistencies and bridge the gap that exists between the sensors, we have established a Multi-sensor Aerosol Products Sampling System (MAPSS), which consistently samples and generates the spatial statistics (mean, standard deviation, direction and rate of spatial variation, and spatial correlation coefficient) of aerosol products from multiple spaceborne sensors, including MODIS (on Terra and Aqua), MISR, OMI, POLDER, CALIOP, and SeaWiFS. Samples of satellite aerosol products are extracted over Aerosol Robotic Network (AERONET) locations as well as over other locations of interest such as those with available ground-based aerosol observations. In this way, MAPSS enables a direct cross-characterization and data integration between Level-2 aerosol observations from multiple sensors. In addition, the available well-characterized co-located ground-based data provides the basis for the integrated validation of these products. This paper explains the sampling methodology and concepts used in MAPSS, and demonstrates specific examples of using MAPSS for an integrated analysis of multiple aerosol products.
Multi-sensor Aerosol Products Sampling System (MAPSS)
M. Petrenko,C. Ichoku,G. Leptoukh
Atmospheric Measurement Techniques Discussions , 2012, DOI: 10.5194/amtd-5-909-2012
Abstract: Global and local properties of atmospheric aerosols have been extensively observed and measured using both spaceborne and ground-based instruments, especially during the last decade. Unique properties retrieved by the different instruments contribute to an unprecedented availability of the most complete set of complimentary aerosol measurements ever acquired. However, some of these measurements remain underutilized, largely due to the complexities involved in analyzing them synergistically. To characterize the inconsistencies and bridge the gap that exists between the sensors, we have established a Multi-sensor Aerosol Products Sampling System (MAPSS), which consistently samples and generates the spatial statistics (mean, standard deviation, direction and rate of spatial variation, and spatial correlation coefficient) of aerosol products from multiple spaceborne sensors, including MODIS (on Terra and Aqua), MISR, OMI, POLDER, CALIOP, and SeaWiFS. Samples of satellite aerosol products are extracted over Aerosol Robotic Network (AERONET) locations as well as over other locations of interest such as those with available ground-based aerosol observations. In this way, MAPSS enables a direct cross-characterization and data integration between Level-2 aerosol observations from multiple sensors. In addition, the available well-characterized co-located ground-based data provides the basis for the integrated validation of these products. This paper explains the sampling methodology and concepts used in MAPSS, and demonstrates specific examples of using MAPSS for an integrated analysis of multiple aerosol products.
Resource-functional Approach in Study of Financial Security of a Company and Corporate Management Ресурсно-функциональный подход в исследовании финансовой безопасности предприятия и корпоративного управления
Dyakonova Irina I.,Petrenko Yuliya M.
Business Inform , 2013,
Abstract: The article considers interconnection between financial security of a company and corporate management on the basis of use of the resource-functional approach. It forms an approach to corporate social responsibility as a proactive element of the system of corporate management with consideration of the nature of organisational and socio-economic production relations, key provisions of the legal environment and international standards. It substantiates the role of corporate social responsibility in provision of financial security and realisation of a corporate strategy. В статье рассмотрена взаимосвязь между финансовой безопасностью предприятия и корпоративным управлением на основе использования ресурсно-функционального подхода. С учетом природы организационных и социально-экономических производственных отношений, ключевых положений правового поля и международных стандартов, сформирован подход к корпоративной социальной ответственности как проактивного элемента системы корпоративного управления. Обоснована роль корпоративной социальной ответственности в обеспечении финансовой безопасности и реализации корпоративной стратегии.
Triangular Antiferromagnets
M. F. Collins,O. A. Petrenko
Physics , 1997, DOI: 10.1139/cjp-75-9-605
Abstract: In this article we review the effects of magnetic frustation in the stacked triangular lattice. Frustration increases the degeneracy of the ground state, giving rise to different physics. In particular it leads to unique phase diagrams with multicritical points and novel critical phenomena. We describe the confrontation of theory and experiment for a number of systems with differing magnetic Hamiltonians; Heisenberg, Heisenberg with easy-axis anisotropy, Heisenberg with easy-plane anisotropy, Ising and singlet ground state. Interestingly each leads to different magnetic properties and phase diagrams. We also describe the effects of ferromagnetic, rather than antiferromagnetic, stacking and of small distortions of the triangular lattice.
Estimates’ Formalizing of Innovative Development of the Chemical Enterprises with the Environmental and Economic Performance Формализация оценок инновационных проектов развития предприятий химической промышленности с учетом эколого-экономических показателей
Momot Valeriy M.,Mamutova Tatyana V.
Business Inform , 2013,
Abstract: The article analyzes the influence of chemical plants on the ecological environment. The actuality of the article is explained due to the need to move from the challenge of the environment (instead of or due to economic growth) to the same problem, but in parallel with the growth of the enterprise. The formula calculating the economic impact of the innovative project with the environmental effect is proposed. В статье проанализировано влияние химических предприятий на экологическое состояние окружающей среды. Актуальность работы объясняется необходимостью перехода от решения задачи охраны окружающей среды (вместо либо за счет экономического роста) к той же задаче, но параллельно с экономическим ростом предприятия. Предложена формула расчета экономического эффекта инновационного проекта с учетом экологического эффекта.
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