scholarly journals Magnetic-centrifugal drying of compressed air of pneumatic systems of machine-building enterprises

2021 ◽  
Vol 2131 (2) ◽  
pp. 022033
Author(s):  
A Totay ◽  
S Galyuzhin ◽  
A Galyuzhin
Keyword(s):  
Magnetic Field ◽  
Centrifugal Force ◽  
High Efficiency ◽  
Experimental Studies ◽  
Machine Building ◽  
Compressed Air ◽  
Force Action ◽  
Water Particle ◽  
Advantages And Disadvantages ◽  
Building Enterprises

Abstract The article analyzes such basic methods of drying compressed air of pneumatic systems of machine-building enterprises as condensation, sorption, diffusion and force action and determines the advantages and disadvantages of each of these methods. It is noted that the method of force action on water particles due to the use of the centrifugal force allows you to remove only droplet moisture, and vaporous moisture remains in the compressed air. With further cooling of the compressed air, condensate reappears in it. Other methods are more efficient, but require consumables or complex devices for drying compressed air, which ultimately leads to an increase in the cost of such devices and an increase in operating costs. Based on the conducted analysis and on the fundamentals of theoretical mechanics, magnetic field theory and molecular physics, a method of magnetic-centrifugal drying of compressed air has been developed. The essence of the method is to use the Lorentz force, which acts on a water particle (a molecule, a dimer, a trimer, etc.) and coincides in the direction with the centrifugal force. When using the safe supply voltage of a 24 V solenoid that creates a magnetic field in which an electrically charged water particle moves, it is possible to increase the radial force (compared to the centrifugal force) acting on this particle by about 70 times. The authors also consider the methods of ionization of water particles that allow knocking out electrons from their outer shells. Experimental studies conducted on a mock-up sample showed a fairly high efficiency of this method, since it was possible to achieve the 3rd class of purity according to ISO 8573-1: 2001.

scholarly journals PREVENTIVE ASSESSMENT OF THE FINANCIAL CONDITION OF THE ENTERPRISE FROM THE POSITION OF POSSIBLE BANKRUPTCY RELEVANCE OF RESEARCH

2020 ◽  
pp. 45-53
Author(s):  
V. Mishchenko ◽  
L. Taraniuk ◽  
I. Domnina
Keyword(s):  
Methodological Approach ◽  
Machine Building ◽  
Social Consequences ◽  
External Factors ◽  
Information Support ◽  
Practical Significance ◽  
Advantages And Disadvantages ◽  
Financial Condition ◽  
The Impact ◽  
Building Enterprises

Relevance of research. The actualization of the assessment of the financial condition of the enterprise from the standpoint of possible bankruptcy is indisputable, taking into account the impact of both external and internal factors on the work of the enterprise. The purpose of the study: to develop a methodological approach to preventive assessment of the financial condition of the enterprise, taking into account internal and external factors influencing its economic activity from the standpoint of possible bankruptcy. Methodology and scientific methods: methods of comparative analysis, economic-mathematical modeling, system approach are used. Research results: the article considers scientific trends and problems of assessing the financial condition of enterprises using different methodological approaches. The most well-known formed discriminant models of foreign and domestic scientists are characterized, taking into account their advantages and disadvantages in conducting economic assessment of the financial condition of enterprises. Features and possibilities of application of these models at the domestic enterprises of a machine-building complex are stated. The necessity to develop a dynamic operational model of preventive management is substantiated, which makes it possible to take into account both internal and external national factors and foreign indicators. Unlike the existing ones, this model considers not only financial indicators (profitability ratio, current liquidity ratio, asset turnover, autonomy ratio), but also their importance in the dynamics, as well as taking into account external factors of the country in which the company operates. A new methodological approach for assessing the financial condition of the enterprise with the inclusion of national factors of enterprises and performance indicators of foreign economic entities is proposed. The proposed method of assessing the company in the dynamics in relation to each time to the previous year in terms of bankruptcy characterizes the effectiveness of management and is a signal to take precautions regardless of the stage of the life cycle of the enterprise or its products. The information support of this model serves as a basis for the formation of the company's self-management system. Research framework / possibility of using the results: the proposed methodological approach has an international character and can be used by single-industry enterprises of different countries to assess their financial and economic, marketing, organizational, production, logistics activities, especially when looking for business partners. Practical significance: assessment of the bankruptcy probability index at 12 machine-building enterprises of Ukraine was carried out, conclusions were made on the location of enterprises in the bankruptcy zone. Social consequences: the results of this assessment lead to management decisions by the management of machine-building enterprises on the optimization of jobs, labor movement, internal and external staff rotation.

scholarly journals The use of industrial wastes from machine-building enterprises as packing materials for small-sized absorbers for gas emissions purification

2019 ◽  
Vol 298 ◽  
pp. 00031 ◽  
Author(s):  
Nikolay Merentsov ◽  
Alexander Persidskiy ◽  
Vitaliy Lebedev ◽  
Alexander Golovanchikov
Keyword(s):  
Experimental Data ◽  
High Efficiency ◽  
Machine Building ◽  
Packing Material ◽  
Industrial Wastes ◽  
Packing Materials ◽  
Gas Emissions ◽  
Environmental Cleaning ◽  
Gas Cleaning ◽  
Building Enterprises

The paper covers the prospects to use industrial wastes from machine-building enterprises, appearing while machining various steel grades, as packing materials for industrial absorbers for environmental cleaning processes of gas emissions. The article provides obtained and processed in the criterial way experimental data in hydrodynamics of a packing material sample from metal working machines wastes appearing while treating Aisi 316Ti steel bars; packing material according to the classification method for processing experimental data λ=f(Rem) is oriented to the absorption process during selective gas cleaning in environmental equipment. The authors have compared the studied packing material to the packing that are widely used in industries. The authors have studied the main experimentally confirmed hydrodynamic effects indicating the high efficiency of the proposed packing material. The authors have made calculations for a small-sized industrial absorber for cleaning gas emissions with the use of the studied packing material.

Main approaches to prevention of health disorders in workers in contact with physical factors

2020 ◽  
Vol 60 (11) ◽  
pp. 827-829
Author(s):  
Andrey V. Melentyev
Keyword(s):  
Cardiovascular Risk ◽  
Cardiovascular Diseases ◽  
Machine Building ◽  
Working Environment ◽  
Physical Factors ◽  
Noise And Vibration ◽  
Industrial Enterprises ◽  
Increased Risk ◽  
Health Disorders ◽  
Building Enterprises

Introduction. One of the leading causes of occupational health loss, especially in mining and machine-building enterprises, is the combined impact of industrial noise and vibration. The wide prevalence of cardiovascular diseases is one of the most important medical and social problems, due to persistent disability and high mortality, bringing prevention of health disorders to the first place as the basis for preserving labor longevity. The aim of study is to identify the main approaches aimed at preventing health problems in workers who come into contact with vibration and noise at mining and machine-building enterprises. Materials and methods. A survey and survey of 296 industrial workers was conducted. Group 1 (160 people) included men who were exposed to noise and vibration factors above the maximum permissible levels, group 2 consisted of 136 men who did not have direct contact with noise and vibration generating equipment. When conducting an in-depth laboratory and instrumental examination in a hospital setting, all workers additionally calculated the level of cardiovascular risk on the SCORE scale. Statistical analysis was performed using the software package "Statistica 6.0". Results. It is determined that the priority adverse factors of the working environment in production are noise and vibration. It has been shown that individuals who come into contact with these factors are more likely to detect violations of lipid metabolism and endothelial function, have a higher average heart rate and systolic blood pressure, and have an increased risk of developing cardiovascular diseases. Conclusions. Taking into account the obtained results of the proposed diagnostic approaches aimed at the prevention of health disorders among workers of industrial enterprises. If employees are found to have an increased cardiovascular risk, it is necessary to conduct a more in-depth examination and timely medical and preventive measures.

METHODOLOGY FOR ANALYZING THE EFFICIENCY OF MECHANICAL ENGINEERING ENTERPRISES

2020 ◽  
Vol 1 (4) ◽  
pp. 102-105
Author(s):  
V. A. BORODIN ◽  
◽  
А. I. GALUSHKINA ◽  
E. A. NAGAEVA ◽  
◽  
...  
Keyword(s):  
Economic Efficiency ◽  
Mechanical Engineering ◽  
Economic Condition ◽  
Machine Building ◽  
Evaluation Indicator ◽  
Building Enterprises

The article deals with the assessment of the economic condition of machine-building enterprises . Three major automotive companies were considered as the object of research. Profitability indicators were adopted as the main evaluation indicator. To assess the economic efficiency of enterprises, a formula is proposed that takes into account the weight of its components.

Trends in Diagnosis for Active Tuberculosis Using Nanomaterials

2019 ◽  
Vol 26 (11) ◽  
pp. 1946-1959 ◽  
Author(s):  
Le Minh Tu Phan ◽  
Lemma Teshome Tufa ◽  
Hwa-Jung Kim ◽  
Jaebeom Lee ◽  
Tae Jung Park
Keyword(s):  
Sensitivity And Specificity ◽  
High Efficiency ◽  
Point Of Care ◽  
High Sensitivity ◽  
Signs And Symptoms ◽  
Diagnostic Methods ◽  
Advantages And Disadvantages ◽  
Treatment And Prevention ◽  
Clinical Tools ◽  
Diagnostic Applications

Background:Tuberculosis (TB), one of the leading causes of death worldwide, is difficult to diagnose based only on signs and symptoms. Methods for TB detection are continuously being researched to design novel effective clinical tools for the diagnosis of TB.Objective:This article reviews the methods to diagnose TB at the latent and active stages and to recognize prospective TB diagnostic methods based on nanomaterials.Methods:The current methods for TB diagnosis were reviewed by evaluating their advantages and disadvantages. Furthermore, the trends in TB detection using nanomaterials were discussed regarding their performance capacity for clinical diagnostic applications.Results:Current methods such as microscopy, culture, and tuberculin skin test are still being employed to diagnose TB, however, a highly sensitive point of care tool without false results is still needed. The utilization of nanomaterials to detect the specific TB biomarkers with high sensitivity and specificity can provide a possible strategy to rapidly diagnose TB. Although it is challenging for nanodiagnostic platforms to be assessed in clinical trials, active TB diagnosis using nanomaterials is highly expected to achieve clinical significance for regular application. In addition, aspects and future directions in developing the high-efficiency tools to diagnose active TB using advanced nanomaterials are expounded.Conclusion:This review suggests that nanomaterials have high potential as rapid, costeffective tools to enhance the diagnostic sensitivity and specificity for the accurate diagnosis, treatment, and prevention of TB. Hence, portable nanobiosensors can be alternative effective tests to be exploited globally after clinical trial execution.

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