Currently, phenol-formaldehyde oligomers cross-composite with various thermoplastic oligomers and monomers are well used in many fields, including: as binders in obtaining composite materials, as coating formers, in the production of plastic products and in other fields. is bearing fruit. In this case, the best way to confirm that the obtained oligomers are sooligomers is to study them by nephelometric titration.
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Uzbekistan is subject to several types of disasters caused by natural hazards, such as earthquakes, droughts, floods, landslides, and man-made, including transport accidents and emergencies. The mountainous and foothill areas of the country are also subject to significant risk of landslides. At the same time, over the past 80 years, more than 2,600 cases of large mudslide have been reported. Protection of the population and territories from emergency situations associated with landslide, flood, mudflow and avalanche events is one of the priority tasks in the field of safety. The main factor in provoking a landslide is its waterlogging. In this regard, in this paper, in order to eliminate a possible catastrophe, effective engineering solutions are proposed for drainage facilities, blocking the path of surface and groundwater to the landslide massif. Surface drainage and deep drainage systems are used for drainage. Surface waters are diverted by ditches, underground waters - by tunnels or horizontal wells. Despite the high cost of these activities, the cost of building drainage systems is much lower than the cost of eliminating the consequences of a possible disaster. Drainage systems are designed in such a way as to collect the maximum possible flow of surface water from the area and take it to the places of possible discharge or to treatment facilities.
12.09.2022 Volume 1 Issue 5 View more Download
In the Uzbek article, the problems related to the improvement of the practice of using the basics of ensuring the stability of payment systems in the development of the digital economy in the Republic of Uzbekistan were identified and scientific proposals aimed at solving them were developed. The basics of ensuring the stability of payment systems in the development of the digital economy in the Republic of Uzbekistan
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In this paper, we have studied ways to increase the efficiency of the radiant flux of the Sun by optimizing the technology for obtaining mirror elements, efficient receivers that have a significant impact on the energy parameters of installations. An analysis was made of the optical-energy characteristics of the selective surface, taking into account the effect of microroughness.
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This article describes a method for solving problems related to the topic of light interference in the Optics section. 6 types of problems were solved, reflecting the phenomenon of interference, and based on the results obtained, conclusions were drawn.
12.09.2022 Volume 1 Issue 5 View more Download
This article talks about the correct distribution of economic costs aimed at product quality and its further improvement, as well as the prevention of defects and shortcomings in improving product quality.
12.09.2022 Volume 1 Issue 5 View more Download
The article provides a brief overview of the origin of the derivative, also discusses the issues that students face in lectures on mathematical analysis in universities. A list of questions has been compiled and systematized that the teacher should pay special attention to in mathematical circles. In particular, examples are given of several functions (from the Internet) that are continuous in the interval but do not have a derivative. The functions constructed by the leading mathematicians Bolzano B., Weierstrass K. and Van der Waerden are analyzed in detail. The Van der Waerden function is analyzed in more detail. The main purpose of writing the article is to systematize the available information about continuous but non-differentiable functions and give recommendations for their explanation in circles.
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In this scientific article, the efficiency of credit in the process of transformation of commercial banks is discussed. Commercial banks and their influencing factors were analyzed. The author approached the description of this issue from the point of view of socio-economic importance of bank loans. Scientific and practical recommendations were given based on the analisys of the socio-economic development of the country.
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In this article, strategies have been developed based on the observation and study of the experience of developed countries.Several principles have been developed for the correct selection and use of successful strategies in organizational development.
10.09.2022 Volume 1 Issue 5 View more Download
SCIENCE & INNOVATION