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Search Results: 1 - 10 of 461513 matches for " Alla A. Tashilova "
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Mathematical Modeling of the Influence of the Wind Field Structure in the Atmosphere on the Cloud Formation Processes  [PDF]
Boris A. Ashabokov, Lyudmila M. Fedchenko, Alexander V. Shapovalov, Khazhbara M. Kalov, Ruslan Kh. Kalov, Alla A. Tashilova, Vitaly A. Shapovalov
Atmospheric and Climate Sciences (ACS) , 2018, DOI: 10.4236/acs.2018.81006
Abstract: The state of the physics of convective clouds and cloud seeding is discussed briefly. It is noted that at the present time there is a transition from the stage of investigation of “elementary” processes in the clouds to the stage of studying the formation of macro- and microstructural characteristics of clouds as a whole, taking into account their system properties. The main directions of the development of cloud physics at the upcoming stage of its development are discussed. The paper points out that one of these areas is the determination of the structure-forming factors for the clouds and the study of their influence on their formation and evolution. It is noted that one of such factors is the interaction of clouds with their surrounding atmosphere, and the main method of studying its role in the processes of cloud formation is mathematical modeling. A three-dimensional nonstationary model of convective clouds is presented with a detailed account of the processes of thermohydrodynamics and microphysics, which is used for research. The results of modeling the influence of the wind field structure in the atmosphere on the formation and evolution of clouds are presented. It is shown that the dynamic characteristics of the atmosphere have a significant effect on the formation of macro- and microstructural characteristics of convective clouds: the more complex the structure of the wind field in the atmosphere (i.e., the more intense the interaction of the atmosphere and the cloud), the less powerful the clouds are formed.
Lp-Estimations of Vector Fields in Unbounded Domains  [PDF]
Alexey V. Kalinin, Alla A. Tyukhtina, Artem A. Zhidkov
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.31008
Abstract: Some new estimations of scalar products of vector fields in unbounded domains are investigated. Lp-estimations for the vector fields were proved in special weighted functional spaces. The paper generalizes our earlier results for bounded domains. Estimations for scalar products make it possible to investigate wide classes of mathematical physics problems in physically inhomogeneous domains. Such estimations allow studying issues of correctness for problems with non-smooth coefficients. The paper analyses solvability of stationary set of Maxwell equations in inhomogeneous unbounded domains based on the proved Lp-estimations.
Libyan Licenses Plate Recognition Using Template Matching Method  [PDF]
Alla A. El. Senoussi Abdella
Journal of Computer and Communications (JCC) , 2016, DOI: 10.4236/jcc.2016.47009
Abstract: License plate recognition (LPR) applies image processing and character recognition technology to identify vehicles by automatically reading their license plates. The work presented in this paper aims to create a computer vision system capable of taking real-time input image from a static camera and identifying the license plate from extracted image. This problem is examined in two stages: First the license plate region detection and extraction from background and plate segmentation to sub-images, and second the character recognition stage. The method used for the license plate region detection is based on the assumption that the license plate area is a high concentration of smaller details, making it a region of high intensity of edges. The Sobel filter and their vertical and horizontal projections are used to identify the plate region. The result of testing this stage was an accuracy of 67.5%. The final stage of the LPR system is optical character recognition (OCR). The method adopted for this stage is based on template matching using correlation. Testing the performance of OCR resulted in an overall recognition rate of 87.76%.
Opportunity Costs of Sub-Optimal Diversification
James A. Yunker,Alla A. Melkumian
Accounting and Finance Research , 2012, DOI: 10.5430/afr.v1n2p25
Abstract: The practical relevance of the extensive theoretical literature on optimal diversification has been brought into question by a wide variety of research that suggests individual investors utilize investment principles that are distinctly sub-optimal relative to theoretical principles. If these indications are indeed legitimate, this might be owing to the irrationality of investors, or to imperfections in the theoretical models. The present research suggests a third possibility: that the numerical payoff to optimal diversification is relatively minor. On the basis of a numerically implemented and empirically supported model of optimal diversification developed by Yunker and Melkumian (2010), the present research finds that the numerical opportunity costs (welfare losses) from sub-optimal diversification are quite minor even for substantial departures from the optimal levels of the decision variables. The suggestion from the research is therefore that individual investors tend to “satisfice” rather than “maximize” or “optimize” in making their diversification decisions.
The Effects of Preservation Periods on Meat Characteristics of Camel and Cattle
Dalia A.M. Abd Alla
Research Journal of Biological Sciences , 2012,
Abstract: The aim of this study was to examine the effects of days of preservation (day 1, 7, 14 and 21) on some selected chemical analysis of camels (Camelus dromedarius) and cattle (Bos indicus) and on Water Holding Capacity (WHC) and rancidity. Four kilograms were obtained from the local market, trimmed off fat and only 3 kg left for further processing. Statistical differences at p<0.05 were observed in moisture, fat % and ash between camel and beef. With highest figures obtained in camels in term of moisture and ash; protein showed insignificant difference. As for the WHC, significant variations in day one are evident, with camel showing the highest, almost about times that of cattle. Day one showed that camel has a WHC more than 2 times that of cattle, with the percentage reduced with the advancement of period of preservation. Clear increase in rancidity in both camel and cattle was observed in day 21 and the first three intervals showed little increase, with no species variations.
The Effects of Cooking Methods on Cooking Loss and Sensory Evaluation in Camels (Camelus dromaderius) and Cattle Meat
Dalia A.M. Abd Alla
Research Journal of Biological Sciences , 2012,
Abstract: The main objective of this study, was to determine the effect of cooking method (s) on cooking loss and sensory evaluation in topside muscle from Camel and cattle. The cooking methods used include braising, frying, broiling and roasting. The loss due to different cooking methods is clear, with slight species variations between camel and cattle. From using braising, frying, broiling and roasting, there was an increase in cooking loss, in both camel and cattle, roasting scoring highest lost (58.85 vs. 52.45% for camel and cattle, respectively). As for the sensory evaluation scores, color, flavour, tenderness, juiciness and acceptability camel scored higher figures than the corresponding data for cattle. The lack of training among panelist may account for these variations.
Torsional vibrations of nonhomogeneous magnetostrictive elastic circular cylinder
A. N. Abd-Alla,Lokenath Debnath
International Journal of Mathematics and Mathematical Sciences , 1994, DOI: 10.1155/s0161171294000244
Abstract: This paper is concerned with the torsional vibrations of a nonhomogeneous magnetostrictive elastic cylinder. The cylinder is subjected to the action of a circumferential magnetic field produced by an axial current of constant density and the deformation of a magnetostrictive cylinder is produced by a constant longitudinal magnetic field. The frequency equation is determined, and the displacement and stress components are numerically calculated with graphical presentations.
The Effects of Cooking Methods on Cooking Loss and Sensory Evaluation in Camels (Camelus dromaderius) and Cattle Meat
Dalia A.M. Abd Alla
Research Journal of Biological Sciences , 2008,
Abstract: The main objective of this study, was to determine the effect of cooking method (s) on cooking loss and sensory evaluation in topside muscle from Camel and cattle. The cooking methods used include braising, frying, broiling and roasting. The loss due to different cooking methods is clear, with slight species variations between camel and cattle. From using braising, frying, broiling and roasting, there was an increase in cooking loss, in both camel and cattle, roasting scoring highest lost (58.85 vs. 52.45% for camel and cattle, respectively). As for the sensory evaluation scores, color, flavour, tenderness, juiciness and acceptability camel scored higher figures than the corresponding data for cattle. The lack of training among panelist may account for these variations.
The Effects of Preservation Periods on Meat Characteristics of Camel and Cattle
Dalia A.M. Abd Alla
Research Journal of Biological Sciences , 2008,
Abstract: The aim of this study was to examine the effects of days of preservation (day 1, 7, 14 and 21) on some selected chemical analysis of camels (Camelus dromedarius) and cattle (Bos indicus) and on Water Holding Capacity (WHC) and rancidity. Four kilograms were obtained from the local market, trimmed off fat and only 3 kg left for further processing. Statistical differences at p<0.05 were observed in moisture, fat % and ash between camel and beef. With highest figures obtained in camels in term of moisture and ash; protein showed insignificant difference. As for the WHC, significant variations in day one are evident, with camel showing the highest, almost about times that of cattle. Day one showed that camel has a WHC more than 2 times that of cattle, with the percentage reduced with the advancement of period of preservation. Clear increase in rancidity in both camel and cattle was observed in day 21 and the first three intervals showed little increase, with no species variations.
Rational soliton on the plane wave background for the (1+2) $|φ|^4$-model with negative coupling
Alla A. Yurova,Artyom V. Yurov
Physics , 2006,
Abstract: We show that $(1+2)$ nonlinear Klein-Gordon equation with negative coupling admits an exact solution which appears to be the linear superposition of the plane wave and the nonsingular rational soliton.
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