Tiny Dirt's Cleaner of Resource-Saving Cotton Buds

The conclusions of an assessment of existing design approaches for raw cotton cleaners from small litter are presented in this article. A structure diagram and the operating principle of a revolutionary effective design of a cotton cleaner made from microscopic litter, fitted with an additional reflector with a wavy surface, are displayed

ACTUAL PROBLEMS OF MODERN PRIMARY EDUCATION

The conclusions of an assessment of existing design approaches for raw cotton cleaners from small litter are presented in this article. A structure diagram and the operating principle of a revolutionary effective design of a cotton cleaner made from microscopic litter, fitted with an additional reflector with a wavy surface, are displayed

Impact of COVID-19 on cardiovascular testing in the United States versus the rest of the world

Objectives: This study sought to quantify and compare the decline in volumes of cardiovascular procedures between the United States and non-US institutions during the early phase of the coronavirus disease-2019 (COVID-19) pandemic. Background: The COVID-19 pandemic has disrupted the care of many non-COVID-19 illnesses. Reductions in diagnostic cardiovascular testing around the world have led to concerns over the implications of reduced testing for cardiovascular disease (CVD) morbidity and mortality. Methods: Data were submitted to the INCAPS-COVID (International Atomic Energy Agency Non-Invasive Cardiology Protocols Study of COVID-19), a multinational registry comprising 909 institutions in 108 countries (including 155 facilities in 40 U.S. states), assessing the impact of the COVID-19 pandemic on volumes of diagnostic cardiovascular procedures. Data were obtained for April 2020 and compared with volumes of baseline procedures from March 2019. We compared laboratory characteristics, practices, and procedure volumes between U.S. and non-U.S. facilities and between U.S. geographic regions and identified factors associated with volume reduction in the United States. Results: Reductions in the volumes of procedures in the United States were similar to those in non-U.S. facilities (68% vs. 63%, respectively; p = 0.237), although U.S. facilities reported greater reductions in invasive coronary angiography (69% vs. 53%, respectively; p < 0.001). Significantly more U.S. facilities reported increased use of telehealth and patient screening measures than non-U.S. facilities, such as temperature checks, symptom screenings, and COVID-19 testing. Reductions in volumes of procedures differed between U.S. regions, with larger declines observed in the Northeast (76%) and Midwest (74%) than in the South (62%) and West (44%). Prevalence of COVID-19, staff redeployments, outpatient centers, and urban centers were associated with greater reductions in volume in U.S. facilities in a multivariable analysis. Conclusions: We observed marked reductions in U.S. cardiovascular testing in the early phase of the pandemic and significant variability between U.S. regions. The association between reductions of volumes and COVID-19 prevalence in the United States highlighted the need for proactive efforts to maintain access to cardiovascular testing in areas most affected by outbreaks of COVID-19 infection

DETERMINATION OF THE REGULARITY CHANGE BELT TENSION IN THE SLACK SIDE OF BELT TRANSMISSION WITH VARIABLE PARAMETERS

The article analyzes patterns of regularity change tension in the slack side belt transmission with variable gear ratio analytical method. A system of differential equations describing the motion of the belt drive pulleys are obtained. On the basis of numerical solution task of regularity change tension in the slack side belt transmission are received. A graph of changes in the maximum voltage in the slack side from the preliminary transmission belt tension values are constructed. The parameters of belt transmission are justified

ANALYSIS OF CHANGES IN THE TENSION BELT THE RETURN RUN SIDE OF BELT TRANSMISSION

The article analyzes patterns of regularity of changing tension in the slack side belt transmission with variable gear ratio analytical method. A system of differential equations describing the motion of the belt drive pulleys. On the basis of numerical solution task of regularity change tension in the slack side belt transmission. A graph of changes in the maximum tension in the slack side from the preliminary transmission belt tension valueswere constructed. It defines the parameters of belt transmission

ANALYSIS OF THE MOVEMENT OF COTTON PARTICLES ON A FLAT FACE OF A CYLINDER WITH MULTIFACETED SPIKES

The article shows the scheme and principle of operation of the section for cleaning fibrous material when using multifaceted drum pegs. Theoretically studied the movement of pulp on the surface of the face of the drum splitting. A numerical solution of the problem substantiates the main recommended values of the parameters of the treatment zone of the fibrous material7

Substantiation the parameters of the cotton cleaners’ polyhedral vibrating fire-bars

The article describes the principle of operation of the recommended multifaceted grate on elastic supports, as well as the results of the analysis of the grate oscillations, and the parameters are justified. The results of comparative production tests

ANALYSIS OF SMALL FLUCTUATIONS IN THE DRESSING TRAY OF A SEED DRESSING FOR PUBESCENT COTTON SEEDS

The article presents the results of theoretical studies of small fluctuations in the dressing tray of the seed dressing seed for pubescent cotton seeds at different machine performance. Based on the numerical solution of the equation, the laws of the oscillatory movement of the tray with seeds are obtained, based on the analysis of which the main parameters of the oscillatory system are substantiated

Development Of TECHNOLOGY For Obtaining Fireproof Heat Insulating Materials Based On Silicate-polymer Compositions

The research work presents the research results on the technology development for obtaining fireproof tile materials with effective heat insulation properties. The main components used to produce insulating tile materials were readily available raw materials such as standard natrium liquid glass, silicone, hydrochloric acid, epoxy resin, the mineral dolomite and wallastonite, thermovermiculite, as well as other special additives. Based on the work performed, the entire technological cycle of obtaining tile materials has been developed. In the work developed two types of tile material differing in the component composition. The first, tile material with a porous silicate composition and the second tile material, which is derived from, as the main component of thermovermiculite. The technological process weight of obtaining the two types of tile materials consists of several steps. At the first stage of research in the laboratory conditions developed compositions of these materials and then in the next few stages of research developed a full technological cycle of obtaining tile heat-insulating materials. Research samples of tile materials obtained by the developed technology showed that the samples of these materials meet the state standards requirements for physical-mechanical and fire-technical properties

Development of an effective construction scheme and analysis of oscillations of the cotton fiber cleaner saw cylinder

A construction scheme and principle of operation of a fibrous material cleaner with saw cylinders on elastic bearing support are given in the article. The results of theoretical research of oscillations of the saw cylinder of the fiber cleaner are presented. The parameters of the system are substantiated based on the analysis of the law of oscillations of the cylinder and graphic dependencies