South Federal University
Author list of organization
List of articles written by the authors of the organization
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THE OPERATED EYE HYDRODYNAMICS MATHEMATICAL MODELING FOR OPTIMIZATION OF SURGERY THECNIQUE
DescriptionAcceptable values of the drainage hole parameters in the shunt glaucoma surgery were calculated by means of mathematical modeling of different conditions of eye hydrodynamics. The operation method was designed with provision for pressure gradient, rate of the aqueous humor outflow, and the values of intraocular pressure in early and late postoperative period. The balance of liquid in eye was calculated in mathematical model as ordinary differential equation in accordance with flow resistance of every section. The data received by using mathematical model has shown that allowable rate of aqueous humor outflow is gained with the hole diameter of 0,025 mm. This mathematical model should assist to the better understanding of physical processes describing the eye hydrodynamics, should benefit to the operation quality and should create the base to the clinical studies
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MATHEMATICAL MODELING OF MTU TENSILE LOAD
DescriptionThe article is devoted to mathematical modeling of random process that occurred in tensile load of serial and experienced MTU. The efficiency of EDM application in transmission is discussed
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MATHEMATICAL MODELING OF MTU TENSILE LOAD
DescriptionThe article is devoted to mathematical modeling of random process that occurred in tensile load of serial and experienced MTU. The efficiency of EDM application in transmission is discussed
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THE MATHEMATICALLY BASED CHOISE OF VISCOELASTIC IN SHUNT GLAUCOMA SURGERY
DescriptionThe dramatic lowering of intraocular pressure (hypotony) is developing during glaucomatous surgery due to the formation of the new aqueous humor outflow. The calculations of the flow in the fluid balance parameters have shown, that for the normal intraocular pressure maintenance in the postoperative period the fluid flow out of the anterior chamber should not exceed 0,04 microliter in minute. The intensity of the aqueous humor outflow through the shunts with different parameters does not depend on the shunt length. The shunt with the inner hole radius 0,025 mm is the most safe as it provide the less outflow. The experimental comparative study of the static viscosity of the most widely used viscoelastics in ophthalmological surgery was carried out. It was stated that used in eye surgery viscoelastics on the basis of 1%, 2% and 3% sodium hyaluronate possess the viscosity, that differs in 10 and 100 times and has significant influence on the flow intensity out of the anterior chamber when the new outflow tracts are formed. The mathematically based choice of the most optimal relationship between the viscoelastics physical parameters and the inner hole size of the shunt type glaucoma drainage devices was established. Shunt with the inner hole radius 0,05 mm and simultaneous use of 2% and 3% sodium hyaluronate solution is the most safe for the maintenance of the eye tonus during the first 5 days after glaucoma surgery. The presented correlation allows to increase the safety of the surgical treatment of the patients with the refractory glaucoma
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THE MATHEMATICALLY BASED CHOISE OF VISCOELASTIC IN SHUNT GLAUCOMA SURGERY
DescriptionThe dramatic lowering of intraocular pressure (hypotony) is developing during glaucomatous surgery due to the formation of the new aqueous humor outflow. The calculations of the flow in the fluid balance parameters have shown, that for the normal intraocular pressure maintenance in the postoperative period the fluid flow out of the anterior chamber should not exceed 0,04 microliter in minute. The intensity of the aqueous humor outflow through the shunts with different parameters does not depend on the shunt length. The shunt with the inner hole radius 0,025 mm is the most safe as it provide the less outflow. The experimental comparative study of the static viscosity of the most widely used viscoelastics in ophthalmological surgery was carried out. It was stated that used in eye surgery viscoelastics on the basis of 1%, 2% and 3% sodium hyaluronate possess the viscosity, that differs in 10 and 100 times and has significant influence on the flow intensity out of the anterior chamber when the new outflow tracts are formed. The mathematically based choice of the most optimal relationship between the viscoelastics physical parameters and the inner hole size of the shunt type glaucoma drainage devices was established. Shunt with the inner hole radius 0,05 mm and simultaneous use of 2% and 3% sodium hyaluronate solution is the most safe for the maintenance of the eye tonus during the first 5 days after glaucoma surgery. The presented correlation allows to increase the safety of the surgical treatment of the patients with the refractory glaucoma
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Description
There are the results of the research of risks to the customer and outsourcing company while execution of a contract of a finance and accounting outsourcing. The risks before and after the transfer of financial and accounting functions for the outsourcing were compared. The methods of developing management solutions to reduce the risks for both parties of financial and accounting outsourcing are presented. The article can be useful for managers of small and medium enterprises, financial officers, directors of companies providing services of the financial and accounting outsourcing
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METHODOLOGY OF MODELING SOCIAL SYSTEMS FOR CONFLICT ANALYSIS AND CONTROL
DescriptionThis article provides results of studying the world achievements in modeling social systems in the aspects of personality, group, and social institute (e.g. the state and army). Through prism of conflict, we review research methodology for modeling social identity, social navigation, geopolitical processes, and command and control systems of the enemy. We discuss four agent-based models of social identity: SCIPR, MetaContrast, PS-I, and SILAS. We examine Spence model for modeling social navigation. Basic principles for modeling relations between the states are considered using ontology approach. The presented model allows systemic analysis of various micro- (intrastate) and macrolevel (external) variables and relations between them. Modeling command and control system of the enemy is implemented as a part of an automated decision support system that tackles the problems of enemy structure identification as well as classification of objects and relations within the structures. The object of study are approaches, methods and models for representation and analysis of group interaction. The subject of study are processes of agent self-identification and interaction, formal and informal organizations, the states and public institutes as well as processes and principles for group formation and mechanisms for behavior control. Research methodology: social network analysis, ontology approach, theory of graphs and hypergraphs, multiagent systems
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Description
The problems of quality of services and issues of cost management on the quality of services are analyzed. Special attention is paid to companies that provide services of audit, consulting, examination and development of measures to improve fire safety and a labor safety at the enterprises. Problems of quality of ser-vices have been classified. Results of the analysis of functions, methods and instruments of product quality control have been presented
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Description
The problems of quality of services and issues of cost management on the quality of services are analyzed in the article. Special attention is paid to companies that provide services of audit, consulting, examination and development of measures to improve fire safety and a labour safety at companies. Problems of quality of services are classified. Methods of multidimensional systems analysis of the problems of the quality of services are offered
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MODELS OF NEURONS WITH MEMORY OF STATE FOR ORGANIZATION OF NEUROEVOLUTIONAL CALCULATIONS
DescriptionThe article discusses the model of a neuron with memory. The proposed model is formed based on the model of the dynamic neuron. The proposed solutions allow to efficiently model dynamic processes and to provide a two-level scheme for evolution of neural networks. The first level of evolution is achieved using traditional neuro-evolution models that allow you to create or to modify basic network settings. The second level allows you to track the history of the development process. The article presents a formal description of the proposed models and algorithms of functioning of the network, is the rationale for the use of the proposed models