STUDY OF ATMOSPHERIC AIR POLLUTION OF POLTAVA REGION
Ukraine as a whole, as well as Poltava Region in particular, have a problem with the state of atmospheric air pollution, because the vast majority of motor vehicles and industrial, energy, and mining enterprises are not equipped with proper cleaning filters. A clear confirmation of the ineffectiveness of Ukraine in matters of monitoring the condition and protection of the atmosphere, in comparison with European countries, was the scandal with the manipulation of exhausts of the Volkswagen concern (Dieselgate). Diesel engines use a catalyst with injection of a urea solution (AdBlue), or a catalytic converter built on the principle of accumulation of nitrogen oxides on a metal surface made of barium compounds . Synthetic urea in automotive catalysts transforms dangerous nitrogen oxides into harmless nitrogen and water . However, due to the software, during everyday use of the VW engines in question, this function remained disabled and the catalytic converter was simply removed. However, we see such cars, along with others, even more morally and technically outdated, on the roads of Ukraine every day. The practice of burning stubble in spring and autumn also leads to extreme consequences of air pollution. The morally outdated system of monitoring the state of the atmosphere, which has remained in Ukraine since Soviet times, is not able to show the real state of pollution, and the lack of proper control on the part of the state leads, in general, to the worsening of the situation every year. Environmental problems in the country in general, and in Poltava Oblast in particular, are the cause of the spread of cancer and high human mortality. Almost 80,000 people die of oncology in the country every year. According to 2020 data, the mortality of the population of Poltava Oblast from non-communicable diseases exceeds the average indicators for Ukraine: Ukraine – 1,597 people per 100,000 population, Poltava Oblast – 1,793 people per 100,000. Therefore, the relevance of the problem raised is extremely high, and it is necessary to start with monitoring air pollution and raising the problem at the national level, because most of the country's residents do not even know what kind of air they breathe at home and on the street.
Synthesis of Mesoporous Carbons and Their Application for EDLC
The quick increasing energy consumption arouses the interest in the development of power storages. Electrochemical supercapacitor is one of clean and sustainable candidates of energy storage system, and porous carbons are the most potential candidate as electrode materials for electrochemical supercapacitor because of their large surface areas, high chemical and physical stability, good conductivity, as well as low cost. In this work, we synthesized the mesoporous carbons by using ZnO nanoparticles as sacrificing template via nano-casting synthetic process and natural porous carbon materials. The synthesized porous carbon has a mesoporous structure. Because the surface area and pore size of the synthesized mesoporous carbon are larger than that of the coconuts fiber-derived carbon, the CV plots show that the synthesized mesoporous carbon has a good rectangular shape and a much better performance than that of the coconuts fiber-derived carbon. We also develop an easy way to discriminate how well a supercapacitor works. We applied these porous carbon-based electrodes on both handmade as well as the commercial capacitors and measured their electrical performances. The handmade EDLC is less efficient than the commercial capacitor.
An Analysis and Optimization of Double Parallelogram Lifting Mechanism
Double Parallelogram Lifting Mechanism (DPLM) is a compact and stable lifting mechanism with a large extension range widely adopted in robot designs. Rubber bands and springs are often installed on the DPLM to lighten the motors' load and maintain its height, yet the installation positions are often obtained through trial and error. This project aims at finding the optimal rubber band installation positions for DPLM using modeling and optimization techniques. A mathematical model which describes the forces and moments acting on all the linkages of DPLM was derived based on the conditions for the static equilibrium and verified with a 3D simulation software. A genetic algorithm (GA) was implemented to optimize rubber band installation positions, which managed to find solutions with the overall root-mean-square- error (RMSE) of the net moment less than 2 for 2 to 6 rubber bands. A further statistical analysis of 50000 random rubber band samples showed that installing rubber bands in triangles is the best solution with the overall lowest RMSE. A test was conducted with a prototype of the DPLM and the results were consistent with our model and optimization. This project derived and verified a mathematical model for the DPLM, and found the optimal way and positions to install rubber bands. The results of this project provides a theoretical basis for controlling DPLM with rubber bands, allowing it to be further adopted in industrial robots that require repetitive lifting and lowering such as inspection robots and aerial work platforms.