ENERGY-SAVING PREPARATION OF THE SOIL FORPLANTING HOPS

At present, the preparation of the soil for the hop plant with machines of traditional hop production technology is unrealistic, since there are no more hops and no one is producing them. In this regard, a progressive technology for growing hops and promising machines for them, including for energy-saving tillage for hops, have been proposed. As the main cultivation, two-strip soil cultivation was used for rows of hops with a combined subsoiler-drener developed at the Chuvash State Agrarian University. Moreover, loosening is carried out with the simultaneous introduction of liquefied litterless manure with a dose of 100-120 t / ha to the subsurface zone from 0.20 to 0.60 m. In the soil, liquefied litterless manure fills the drainage canal and the soil pores adjacent to the canal, activates the activity of microorganisms and soil biochemical processes. Row loosening with a combined machine allows to reduce the energy consumption of processing by 57% compared to continuous plowing with plantation plows and to exclude the operation of applying bedding manure with subsequent moldboard embedding. As a pre-planting soil preparation, cultivation with combined stubble cultivators of the KST-3,8 type and its analogues with the incorporation of crushed green manure (up to 75%), high-quality leveling and crumbling of the soil is proposed. Stirring and leveling of the field surface is provided by afrontal discs behind the last row of flat-cut tines, crumbling - by a ribbed roller. The maneuverability of such a cultivator in the cramped conditions of the hop is taken into account. Replacement of plowing operations with general purpose plows and subsequent leveling by a cultivator allows an additional 45-50% reduction in the energy intensity of pre-planting soil cultivation. The main energy source in the main tillage is the tractor BTZ-243k

Experimental Assessment if Changes in Structural Steel Composition by Progressive Technology Cutting

The submitted paper deals with the issue of change in structure, hardness and thermally affected zone of the samples of a toothed wheel part produced by technology of cutting by plasma, laser and water jet. The cutting process by laser and plasma technology causes intensive thermal affection of material and change in structure and microhardness in the cutting area referred to as thermally affected zone. The paper describes three material cutting technologies of the toothed wheel part. The experimental part contains description of experimental sample preparation, its hardness measurement and examination of structure along with further evaluation through graphs and photo documentation of structures.

Discovering Nano-Nutraceutical concepts, existing knowledge and future perceptions

Nanotechnology is a vital progressive technology facilitating role, progress, and viable effect on food, treatment, medicine, cultivation and farming sector. A nutraceutical is characterized as an ingredient that is related to food and gives medical compensations to the human being, including the prevention and healing of illness. The well-being and health of people are to a great extent, directed by the utilization of nutritious diets. Further numerous investigations have connected good diets as supportive in fighting various deteriorating communicable and non-communicable diseases. There are various studies that explore the relationship between health promotion and various plant and animal food. Although, a considerable number of naturally arising health-promotion constituents are the source of plants, there are various physiologically dynamic parts in animal items that have worth considering for their possible function in ideal well-being. Moreover, the utilization of naturally active constituents in leafy foods and fruits has been connected to fighting various illnesses, such as malignant growth, cardiovascular illnesses, weight, and gastrointestinal problems.

Different Response of Cast and 3D-Printed Co-Cr-Mo Alloy to Heat Treatment: A Thorough Microstructure Characterization

The Co-Cr-Mo alloy is a biomaterial with very good corrosion resistance and wear resistance; thus, it is widely applied for knee replacements. The wear resistance is influenced by the amount of hcp phase and morphology of carbidic precipitates, which can both be altered by heat treatment. This study compares a conventional knee replacement manufactured by investment casting with a material prepared by the progressive technology of 3D printing. The first set of results shows a different response of both materials in increasing hardness with annealing at increasing temperatures up to the transformation temperature. Based on these results, solution treatment and subsequent aging at conditions to reach the maximum hardness was applied. Microstructural changes were studied thoroughly by means of optical, scanning electron and transmission electron microscopy. While increased hardness in the conventional material is caused by the precipitation of fine hard carbides combined with an increase in the hcp phase by isothermal transformation, a massive fcc → hcp transformation is the main cause for the hardness increase in the 3D-printed material.

Grading as a progressive technology for managing financial incentives of employees

One of the most efficient ways to financially motivate personnel is grading, which is conducted using a number of stages of grading system development and implementation. The grading mechanism is considered, the job evaluation is carried out according to the selected factors using the example of the specific company. The summary analysis of the research results is provided in the article. According to the conclusions, the use of grading contributes to the efficiency increase of staff motivation, which ultimately leads to the increased labor productivity.

Design optimization of a compressor stage with counter-rotating rotors

The paper deals with the design optimization of the compressor stage with counter-rotating rotors, especially in order to create a model which, due to its parameters in real operation, would achieve the maximum possible values of efficiency. The primary goal of this work is to create a design of a compressor stage with counter-rotating rotors from a theoretical point of view. The compressor stage model is created using Inventor modelling software and the subsequent design evaluation and optimization is based on airflow analysis of the compressor stage using Ansys Discovery Live software. The secondary goal is to point out the existence and application of innovative and progressive technology of rapid prototyping in the world of aircraft component production and at the same time to emphasize its benefits in comparison with conventional production techniques applied in the initial stages of aircraft component production.

Development of composition and process of obtaining multicomponent ferroalloys

The main product of ferroalloy plants is standard ferroalloys. They often do not have all the necessary service characteristics and are not very suitable for metal processing in a ladle. The developing progressive technology of steelmaking is forced to adapt to the existing range of ferroalloys, the standards for which have not been updated for 50 years or more. In addition, in recent years, the sources and markets of ferroalloy raw materials have changed, and their quality and content of leading elements have decreased. This makes it difficult or excludes the possibility of obtaining ferroalloys according to existing standards. In this regard, the production of more efficient ferroalloys of a new generation is required, suitable for progressive processes in the developing areas of ferrous and non-ferrous metallurgy 795 and smelted from non-traditional types of domestic ore raw materials. These include complex or multicomponent ferroalloys containing, in addition to iron, two or more functional elements. Complex ferroalloys should be created in the most favorable combinations of component. It contributes to the necessary effective impact on the iron-carbon melt with a high degree of assimilation of useful elements in it. The creation of scientific foundations for the formation of new compositions of multicomponent ferroalloys with high consumer properties, and the development of physicochemical processes for obtaining these alloys from unconventional ore raw materials contributes to solving the problems of developing compositions of effective new generation ferroalloys and expanding the ore base of ferroalloy production. When using the developed method of designing the composition of complex ferroalloys using unconventional raw materials, melting technologies were developed; various alloys of the systems were obtained and applied on a laboratory and industrial scale: Fe – Si – Cr, Fe – Si – B, Fe – Si – Ba – Ca, Fe – Si – Al – Nb, Fe – Si – Ca – Mg, Fe – Si – V – Ca – Mn, Fe – Si – Al.

Innovations in Education—The Development of a New Pedagogical Technology of a Combinational Type, Focused on the Development of Personality of Students

The paper considers the problem of adolescent and young students’ personalities’ development in the conditions of face-to-face and distance school learning. The scientific novelty of the study is the proposed classification of pedagogical technologies according to the degree of their novelty: modernized technology, combinational technology, progressive technology, pedagogical technology of the combinational type, the essence of which is shown in its title. A specific model of pedagogical technology of the combinational type “Teaching in cooperation, in a team using flipped classroom” was developed. The developed technology was implemented during the classes of the humanities and natural-mathematical cycles. Nine hundred and eight adolescent and young students (divided into experimental and control groups) and 32 teachers participated in the experimental work. To analyze the differences between the experimental and control groups in terms of the student’s personality manifestation, several criteria and indicators were considered. For mathematical and statistical processing of the obtained results, the multifunctional statistical Fisher’s F-test was used. Analysis of the implementation of the developed technology in the conditions of face-to-face and distance learning showed a positive dynamics of experience formation of the student’s personality manifestation. This allowed the authors to consider the developed pedagogical means effective.

Review of Dynamic Positioning Control in Maritime Microgrid Systems

For many offshore activities, including offshore oil and gas exploration and offshore wind farm construction, it is essential to keep the position and heading of the vessel stable. The dynamic positioning system is a progressive technology, which is extensively used in shipping and other maritime structures. To maintain the vessels or platforms from displacement, its thrusters are used automatically to control and stabilize the position and heading of vessels in sea state disturbances. The theory of dynamic positioning has been studied and developed in terms of control techniques to achieve greater accuracy and reduce ship movement caused by environmental disturbance for more than 30 years. This paper reviews the control strategies and architecture of the DPS in marine vessels. In addition, it suggests possible control principles and makes a comparison between the advantages and disadvantages of existing literature. Some details for future research on DP control challenges are discussed in this paper.

Influence of MTP on Surface Roughness and Geometric Accuracy of Machined Surface at WEDM

Electrical discharge machining technology is one of the most precise machining methods. Therefore, even the smallest deviation of micro and macro geometry generally has a significant impact on the overall quality of products produced by this progressive technology. The quality of the machined surface after Wire Electrical Discharge Machining (WEDM) is influenced by a large number of factors, most of which are influenced by the Main Technological Parameters (MTP). The aim of the paper was to describe the results of experimental research aimed at assessing the impact of MTP for WEDM on the quality of machined surface in terms of geometric accuracy and roughness parameters Ra and Rz. The samples were made of high alloyed ledeburitic chromium-molybdenum-vanadium steel designated EN X155CrVMo12-1 on a Sodick AQ535 electroerosion machine. The tool used was a standard compact brass wire  0.25 mm with the designation Elecut Brass CuZn37.