Don state agrarian University
Author list of organization
List of articles written by the authors of the organization
-
Description
Under conditions of high competition, marketing of educational services is seen as a management tool for the establishment of additional professional education and improve its competitiveness. In this regard, a quantitative characteristic of a state and dynamics of key parameters of establishment of additional professional education based on monitoring of efficiency of marketing activity has become urgent. We have considered existing methodical approaches to evaluating marketing effectiveness of educational institutions. The two-component technique of assessment of efficiency of marketing in institutions of additional professional education of an agrarian profile including the complex diagnostic analysis on key blocks and their significant characteristics and assessment on the basis of the adapted technique of definition of stability of development of social and economic system, considering specifics of activity of institutions of additional professional education of an agrarian profile is developed. The author's system of indicative indicators in the main directions allowing realizing the general principles of marketing in system of agrarian educational institutions is offered. We present results of assessment of stability of development of educational institution present on the example of institute for personnel refresher training of agro-industrial complex (Zernograd, Rostov region)
-
Description
The aim of the article is theoretical and experi¬mental confirmation of the possibility to improve the acceleration performance of tractor units by in¬stalling a tow hitch with variable stiffness. Application of speed tractors in agricultural pro¬duction meets a number of difficulties associated with the unsteady processes, especially while accel¬erating of machine and tractor units. The resulting large inertial loads during acceleration lead to loss of engine power, due to which the machine and tractor unit operates with less performance and economy. Our analysis of published studies shows that the acceleration performance of tractor units is greatly influenced by the rigidity of external links in the form of coupling devices installed between the trac¬tor and the agricultural machine. The design of the tow hitch with variable nonlinear stiffness for class 1.4 tractors is offered. The results of theoretical and experimental studies on the effect of the proposed tow hitch with variable nonlinear stiffness on the acceleration capabilities of machine and tractor units based on class 1.4 tractor are shown. Based on the analysis of characteristics obtained by the analytical and experimental ways, it was proved that the use of the hitch with a variable non-linear stiffness on class 1.4 tractor helps to improve the acceleration performance of the machine and tractor unit
-
ANALYSIS OF FUNCTIONING OF RAILROAD WAREHOUSE OF MINERAL FERTILIZERS
DescriptionThe railroad warehouse has most important role in the delivery process of fertilizers to agricultural consumers. It acts as logistics intermediaries. The analysis of material flows has been done on the example of a typical provider of mineral fertilizers in the South of the Rostov region (CJSC «Zernogradagrohimservis») for the last 6 years. Income values and implementation values are varied during the year synchronously for all fertilizers types with the exception of a few months at the beginning and the end of the year. During most of the year the enterprise operates as a negotiable warehouse. In January-February and October-December ammonium nitrate accumulates as a seasonal inventory for the spring peak of implementation, in the rest of the year its reserves are insurance. Stocks of other fertilizers types are insurance stocks for most of the year, in May-July occurs a slight accumulation of their seasonal stocks. A significant portion of mineral fertilizers (especially ammonium nitrate) is delivered for small enterprises and individual farms by cars of this provider. According to the supply contracts, a one-car-run is performed for the vast majority of customers. Routes of delivery of fertilizers are either radial or pendulum (with reverse idle mileage). Therefore, the optimization of the delivery of fertilizers does not seem possible by methods such as obtaining the shortest route network, consolidation of suppliers for consumers, etc.
-
Description
The article presents a computer program, which define automobile transport demand for the transport service of harvesters in the grain harvesting process. The program has a simple and intuitive user interface, a flexible setting system. It allows to change the source data for needs everything agricultural companies. It doesn’t require an installation and it can function in everything operation systems, which is fitted for Microsoft office applications acting. It doesn’t require a special studying or deep knowing in a mathematical statistic for using. Everyone specialist can use the program in an agricultural enterprise. The program considers distribution laws of stochastic parts of the grain harvesting process. These process features are important to consider due to using of determination values give very rough results. If there are mistakes in the structure design of the harvesting-transport complex then there are nonproductive machines downtimes or the harvest losing. Using the program gives better organization of the transport service in the grain harvesting process, and it can give the economical effect. It is especially important in modern competitive conditions at the worldwide market of agricultural products and also at the interior market with consideration of external economical sanctions and with consideration of the declared import replacement course. The successful work of agricultural enterprises defines the country's food security and it turns down the oil dependency of the Russian economy
-
TO THE THEORY OF STRENGTH OF DIESEL ENGINE EXHAUST GAS PURIFICATION OF SOOT PARTICLES
DescriptionThe problem of environmental protection from the contamination by toxic products, contained in the exhaust gases, is one of the most topical in the modern world. Nitrogen oxides and soot particles are the most toxic. Getting into the environment and the human body, they cause heavy chronic disease and significantly impair the quality of animal and plant products. The developed gas purification system SCR, the technology of plasma purification of exhaust gases have not found wide practical applications because of their high value. The study of papers dedicated to reducing exhaust gas toxicity shows that the use of combined means of purification, which usually include mechanical, thermal and catalytic methods of purification, is the most effective. Our work deals with the issue of purifying the diesel engine exhaust from fine particulate matter resulting in the combustion of fuel and oil motor partly. The article notes that the carbon is not magnetic, so the use of a magnetic field acting as an agent for the purification of exhaust gas from the carbon soot particles is impossible. The purification in a centrifugal field requires the creation of structurally complex centrifuges, so it is ineffective. We consider the possibility of purifying the exhaust gases from the soot particles in the electrostatic field. The device presents the collecting electrode, which is shaped as a cylinder, and an axial central electrode, which is mounted on an insulated spacer within the cylindrical body. The study deals with the physical and mathematical simulation of processes occurring in the proposed device of the purification of exhaust gases. The equality of the Coulomb force and the Stoks force determines the magnitude of the electrostatic field strength that is necessary for the purification of exhaust gas from the soot particles. We have identified the desired length of the collecting electrode
-
Description
In the context of implementing programs on reducing budget expenditures for the social sphere utilities, it is urgent to intrude renewable energy sources into the practice of their energy supply. However, despite all their diversity, not all constructions based on renewable energy sources can be used under conditions of urban development. Besides, the mutable nature of the solar radiation coming on the Earth's surface requires specific forecasts and calculations of its intensity. Accurate estimation of the area solar energy potential of the generating plant proposed location allows not only to justify its parameters at the design stage, but also to predict its operating mode and to evaluate its technical and economic efficiency. The purpose of the article is to estimate the level of solar radiation for Volzhsky, Volgograd Region, at the initial stage of designing and justifying the implementation of power plants transforming renewable solar energy in urban areas. In the article, it is proposed to apply method for estimating the solar energy potential of at a specific geographic point, based on a combination of the calculation method for determining the solar radiation characteristics and actinometric measurements. Volzhsky of the Volgograd Region, like most settlements in the Lower Volga region, has a high solar energy potential: 1228.8 kWh / m² for the horizontal surface of the southern orientation of the receiving surface of power plants, which can be increased by 16.2% at its optimal orientation relative to the horizon and the sides of the world. However, the expansion of the utilization of the solar energy potential of the district may be limited to the location of the existing buildings and structures at which power plants may be located in urban development conditions
-
WOOL PRODUCTIVITY OF MERINO SHEEP OF IMPROVED GENOTYPES
06.00.00 Agricultural sciences
DescriptionThe article deals with the issue of improving the profitability of sheep breeding by using improved mutant genotypes in the breeding system. The results of studies of the main indicators of economic-useful traits are given, the dynamics of growth, level and quality of wool productivity of sheep of improved genotypes obtained on the basis of such breeds as Soviet merino and Stavropolskaya, as well as firstgeneration daughters cultivated in themselves are estimated. It was found that at birth, the live weight in the groups of the 3 group (the breeding of half-blooded hybrids "in oneself") was higher than that of the females from the 1 and 2 groups, respectively, by 0.50 kg, or 13.1%, and by 0.20 kg or 5.2% (P> 0.95). At a more senior age, the young, having a large live mass at birth, retained its rank position. The highest indicator of the cutting of physical wool was observed in animals of the 2 group, obtained as a result of the use of sheepproducers of Stavropolskaya breed on sheep of the Soviet merino. The parameters of the 1 and 3 group were lower by 0.6 kg - 12.3% and 0.17 kg - 3.5% (P> 0.95), respectively. The conclusion is made that the use of sheep-producers of the Stavropolskaya breed on the uterus of the Soviet merinos breed had a positive effect on the wool productivity and the live weight of the hybrid offspring. Further breeding of half-blooded hybrids “in oneself” showed the possibility of reproducing improved genotypes without losing the acquired qualities
-
Description
The aim of the article has been the study of deflection laws in tractor oversize low-pressure tires, intended for class 5 tractor propulsion. The research method was experimental. The "tire tester" and specially designed devices for determining the deflections of the inner and outer tube relative to the rim in the circumferential, radial and collateral directions have been used in it. A number of factors determine outcome indices of the wheel with pneumatic tyre. Among them the ability of the tire to deform so that at low - hysteresis losses in the rubber-cord casing and admissible stresses in it, based on resource, the largest area of contact with the supporting base has been created. This circumstance is of particular importance in the development of tractor tires of low pressure, deflection characteristics of which are poorly studied at present. Analysis of experimental studies showed the necessity of the feasibility of creating the tire with the cord orientation in its casing so that in the zone of perception of the vertical and longitudinal forces the cord threads would work in a mode close to the extension, but in the area of contact it would work in bending. These requirements will best meet the tire in which the cord threads are parallelly located in adjacent layers and directed at a predetermined angle in the direction of effect of the axial forces on the wheel in oncoming fibers
-
ACTIVITIES FOR FORMATION OF THE DEVELOPMENT STRATEGY OF A BANK IN THE SPHERE OF INDIVIDUAL CAR LOANS
DescriptionThe article discusses the prospects of development of crediting in the Russian federation; the author analyzes the important reasons for the increased costs of cars, as inflation and refinancing rate in Russia and the United States. This article also studied the dynamics of sales of cars on credit in recent years, the terms of the car loan program called “Buy back”. In addition, the calculation of economic efficiency in the changing conditions of early repayment of a classic car loan, implementation of Buy back program, and the efficiency of implementation of project proposals
-
MODERN STATE AND TENDENCIES OF DEVELOPMENT OF MEAT CATTLE BREEDING OF RUSSIA
DescriptionThe article reflects modern condition of production of meat of cattle in Russia. We have analyzed the population dynamics of the cattle population and beef production and thee main problems that accompany the functioning of the beef cattle industry. We have given the measures of state support of the industry, to solve problems for which the Ministry of agriculture has developed a program to support the development of beef cattle. Considering prospects and possible risks of development of domestic the beef cattle industry, we have specified a need of such development of the branch; it has to be based, first of all, on implementation of large-scale projects on the basis of the competitive meat breeds of world level. On the basis of the findings we have identified the forecasts for the domestic producers, based on the current market dynamics. Solving the problem of providing the population with beef is possible at the expense of specialized meat cattle breeding. In order to improve economic efficiency of meat production of cattle we must not only find internal reserves and improve industrial relations economic relations, but the establishment of integration structures in the form of unions of agricultural enterprises, processing enterprises and marketing organizations, as well as large-scale economic and legislative support from the state