Scientific Journal of KubSAU

Engagement of educational services consumers in assessment of educational system activities through development of mechanisms for independent assessment of education quality is an important and urgent issue. The article provides review of methods for assessment of consumer satisfaction with educational programs

Modern condition agricultural transport (a significant part of it about 70%) is characterized by a strong deterioration of the rolling stock, the unsatisfactory state of the production base. More than 30% of vehicles operated outside the normative service life, the rest approaching to that state. In general, the provision of agrarian and industrial complex with agricultural vehicles is way below agrotechnical requirements. In the long term, farm machine engineering should focus on indicators of the technical level achieved by best samples of foreign agricultural machinery. Priority development is likely to receive the development of innovative technologies that provide a significant increase in productivity, efficiency and resource conservation in agriculture. To address the shortcomings of transport services agrarian and industrial complex we should improve transport technology with the use of transport logistics, expand and update the existing vehicle fleet, but due to the low solvency of agricultural companies and high prices for of automotive engineering, the problem of providing agricultural vehicles becomes most acute. Thus, the creation of new science-based solutions in technology and engineering for transportation farm produce in terms of Russia's AIC is the actual scientific and technical task that contributes significantly to the development of the country, as well as enhances the enjoyment of breakeven, competitive manufacturing

Based on the previous investigations we have underlined the need to increase fruit and vegetables preservation quality while transporting them from the producer to the consumer at the expense of improving the road transport operation for its intended purpose. We have made a conclusion about the need to develop strategies for maintenance and repair as for the actual technical state at the expense of developing the diagnosis system based on the development of a math model of changing the technical state of the diagnosis object, developing a method of rational set of objects to be diagnosed and determining the technical state optimal control frequency. We have confirmed that the above mentioned is possible when considering the system of technical operation of road transport as an organization-production system and applying the engineering-cybernetic approach to improve this system. We have considered the basic requirements for the efficiency indexes when investigating and improving the operation system that will allow achieving the aim we have had and can be described mathematically. We have made a conclusion about the urgency of the issue we studied and the possibility to develop the efficient operation system of road transport based on the provided criteria

Due to the deterioration of the ecological situation in the world, population tends to eat organically grown foods that are grown either without or with minimal use of chemicals. The development of agriculture in this direction leads ultimately to organic agriculture. To improve the competitiveness of this direction, we need more effective agricultural machines, especially in the last phase of cultivation, namely at the stage of harvesting. One of the most difficult scientific and technical problems with the mechanical harvesting of potatoes is not letting vegetable impurities and tops to fall down in the hopper with the potato tubers, which among other things will improve operational efficiency technology. The article reviewed the various methods for removing the tops, as well as their advantages and disadvantages. The article makes a conclusion about the need for potato top separators in harvesting machines. We have also considered a promising device for removing haulm, a conveyor with flexible fingers on the bars and the clamping beater. Тhe most short-lived structural element of the device for removing haulm, reducing reliability of the device, is flexible fingers mounted on rods. We have proposed to use polyurethane as a material for manufacturing flexible fingers

In recent years, in many countries around the world, much attention is paid to the issues of ensuring of rational use of energy resources, due to a number of objective factors, chief among which are: the lack of own energy resources to meet domestic energy needs; the sharp increase in the cost of production and the production of energy resources; further growth in energy needs; the presence of large potential opportunities to reduce unproductive losses of fuel and energy. In the world, the challenge now is to ensure a gradual but steady transfer of the economy on energy saving way of development. To achieve the goal of reducing energy costs we might use two ways: firstly, the widespread introduction of energy saving technologies, and secondly, the reduction of material production, improving its quality and service. In agriculture, the improvement of the technological process can be carried out using new tillage methods, improving the organization of production and tools. Further development of mechanization in agriculture will contribute to further growth of electrification in the agricultural sector, which will significantly reduce the use of the most expensive and limited energy resources. The article offers a technique of the estimation of the efficiency of consumption of energy in agricultural production. In order to compare the efficiency of machines in the cultivation and harvesting of potatoes, there was conducted an energy assessment of the operations of modern technology. As variables, there were investigated different operation modes of the machine: working speed and working width, depth of stroke of the working bodies. In the process of evaluating energy operations, modern technology to prepare the soil for planting potatoes was determined humidity, mechanical composition and soil type. As a main factor in the analysis of technological methods, we have taken the overall specific energy consumption and specific energy consumption for the digging below tuber formation. Analysis of theoretical researches of agricultural machinery has led to the conclusion that the energy cost of implementing the technological process in the machines of different designs varies

While mechanical harvesting of potatoes, about 20-40% of the tubers get damages. Dynamic loads, injuries of the tubers, causing internal damage – which is browning of the flesh of the tuber, which occurs in the process of its storage. At the same time, ways to express control of damage to potato tubers will allow both reducing damage during harvest, and promptly sending damaged potatoes for recycling before the results of mechanical stress for the tubers during harvesting. The definition of internal damage to the potatoes is possible because of the analysis of the different elasticity of the tissues of damaged and undamaged tubers. The value of overpressure of the device is chosen such way that during deformation of tubers there mainly has been compression of the damaged tissues of the tuber, with the least turgor. The degree of damage of samples of tubers is determined by the ratio of the volume of damaged tissues of tubers to the total volume of the sample. We have given the mechanical properties of tissues of tubers, fruits and root vegetables, their structure, dimensional characteristics, it can be assumed that the use of this method of determining internal damage possible for apples, carrots, beets and harvest of other crops. Use of damage control will enable timely identification of hidden damage and make it possible to eliminate their causes, which lead to increase loss products

Fruit harvesting is the final and decisive operation in the general work plan for growing fruit, which largely determines the qualitative and quantitative indicators of production and economy of industry in general. Increasing productivity by improving the safety of fruits and vegetables is a priority and not an easy task. For example, the use of cleaning technologies with the use of machinery for harvesting of apples by shaking can significantly reduce the time of gathering fruit compared to hand harvesting. This technology may be applicable, if the fruit is grown for the manufacture of juices, jams, etc. Currently, in several European countries and in the USA, they widely use fruit harvesting platforms and machines. The leader in the production of fruit harvesting platforms is Italy. To reduce the damage to fruit in agriculture, the analysis of the traumatic factors is of great importance, with the analysis of available machines and their subsequent modernization with the aim of improving the reliability and quality of harvesting and transport process, taking into account of the algorithm for solving these problems, the creation of new varieties of fruits and vegetables suitable for machine processing, strict compliance with deadlines and agronomic requirements for the performed technological operations, taking into account the savings of energy and resources when using mobile technology. In addition to the modernization of the machines for efficient operation, it is necessary to improve also the scheme of planting of gardens and methods of cultivation, transfer horticulture to intensive way of development

The role of transport in agricultural production is considerable. It is a connecting link in a single technological chain of the agroindustrial complex of the country (RF AIC). In intraeconomic transportation in the RF AIC, along with cars, we widely use tractors. Rational application of wheeled tractors in intraeconomic carriage substantiates the possibility of their movements both on asphalted and dirt roads. A specific share of tractor transport in domestic agriculture amounts 22-27% of the total transport transportations and 50-60% of intraeconomic carriage. There is a high level of the usage of tractor transport in Western European countries and in the United States. In farms of leading Western European countries (Germany, Italy, France and others.) there is about 70-90% of intraeconomic carriage performed by tractor transport. One of the most substantial and difficult tasks is to fight with damage and losses of agricultural production, in which a very responsible role has been assigned to automobile and tractor transport as an important link in the AIC. According to the analysis of materials for the preparation and use of potatoes and apples, more than 15-20% of the products do not reach the consumer. Low quality of the use of vehicles during transportation is a problem. Transport costs in the prime cost of produced products in rural areas reach 30-40% or more. Lowering them will further influence the development of the agroindustrial complex. Thus, the creation of new of scientifically grounded decisions in designs of vehicles for intraeconomic carriage that enhance preservation and performance of potato harvesting and apples in the conditions of Russia's AIC is the actual scientific and technical task. Its solution makes a significant contribution to the development of the country, as well as it contributes to the implementation of breakeven, competitive manufacture

In agriculture the issue of enhancing the efficiency of operation of internal combustion engines (ICE), reducing the costs of maintenance (TO) and repairing (TP) fuel supply apparatus (TA) using the improvement of methods and means of diagnosis is a topical in connection with the aging rolling stock farming and lack of investment. Analysis of the known TA diesel engine vehicles systems showed that the most widespread system is the divided type with multiplunger high pressure fuel pump (fuel pump), while the methods of its diagnosing are laborious, they require partial disassembly and have insufficient accuracy. The mathematical models that characterize the work of a high-pressure fuel pump (fuel pump) use a large number of parameters that significantly affect the quality of dynamics of the change of pressure values of diesel fuel. However, in the materials of previously published articles there were no issues considered assessing the extent of the quantitative impact, performance and features change in the sensitivity settings of the mathematical models on the simulation results, there are no recommendations on the degree of sensitivity and importance of each of the parameters. For a more accurate diagnosis of the fuel supply apparatus of a diesel engine it is advisable to use several methods of diagnosing. The article substantiates development of a mathematical model of a high-pressure fuel pump based on the analysis of modern methods of diagnosing of fuel equipment for autotractor diesel engines

In the study of the processes of growing, harvesting, post-harvesting processing and delivery of fruit and vegetables it seems to be rational to have generalized control of the "product – environment – packaging – transport - storage" in general, as well as providing the possibility of creating optimal conditions for fruit and vegetable products depending on its condition. The basis of ensuring product integrity at all stages of production is a system approach with application of modern information technologies. Optimization of logistic processes in the agro-industrial complex (AIC), in addition to cost, market influences many important indicators of the final product of this complex: quality, timing and reliability of supply, the size of the delivered batches, etc. The quality of fruits and vegetables begins to change dramatically immediately after harvesting. Being in a stressful and unfavorable conditions, fruit, vegetables, root crops intensively lose moisture and consume nutrients, secrete aromatic substances, carry out the breathing process. These losses are caused by biological factors fit fruit and vegetable products to the changed conditions. Thus, the main indicators of the quality of products to control rationally in the process of harvesting and subsequent production phases take into account the data obtained to optimize process parameters to reduce losses and damage products. The article discusses the prospects of applying the system-information approach to the formation of quality of fruits and vegetables during transportation and storage. The proposed embodiment of a generalized control of the "product – environment – packaging – transport - storage", aimed at ensuring the possibility of creating optimal conditions for easy-to-sell agricultural products (fruits, vegetables, root crops) depending on its condition. We have established that rational technology of production and sales of products must have the ability to control and operational adjustments depending on the level of quality input products from the stage of harvest