SOLAR INSOLATION CALCULATION PROGRAM IN MATLAB / SIMULINK ENVIRONMENT

The article describes the mathematical calculation of the inflow of solar insolation, the device and operation of the insolation calculation program, graphs showing the change in radiation from the influence of weather factors, the location of the installation of solar receivers are ob-tained

Lage der Mühlenindustrie im Komitat Baranya und die Veränderungen der Beschäftigtenzahlen zwischen 1876 und 1886

The purpose of the study: This paper aims to analyze how the number of workers changed in the mill industry of Baranya County between 1876 and 1885. The study is based on statistical surveys conducted in those two years. The statistics were compared for several labor market factors (number of entrepreneurs, assistants, apprentices). The earlier statistics (1876) are part of the first authentic national survey, while the milling survey, published in 1885 as a separate publication, contains data. Applied methods. Statistical surveys and data were analyzed and compared. At the end of the study, a mathematical calculation was also performed on the problem of labor force change. From the number of mills closed, it was calculated how many mill workers could lose their jobs during the narrow decade studied. The latter procedure may continue to play a significant role in the future due to the scarcity of available data. Outcomes. The study has two results. The first is that the number of workers in the milling industry (contractors, assistants, apprentices) has decreased in the nine years between the two statistical surveys. The second is that the closure of the mills has contributed significantly to the reduction in the working force. These results call for further investigation. One of the most relevant questions to be answered is: what was the reason for the decrease in the number of mills and the number of workers in the milling industry in Baranya at the same time as the milling industry was a driving force in Hungary.

Impact of innovative activity on the economic security of the enterprise

The article deals with issues related to the assessment of the economic security level taking into account the innovative activity of the enterprise. The relevance of the problem of increasing the degree of economic entities protection in modern conditions with high competition is reflected. The main components that form the economic security of the organization are listed, and their brief characteristics are given. Besides, the article presents the author's step-by-step procedure for assessing the economic security level. Special attention is paid to the impact of effective innovation on the economic security level of the enterprise. The mathematical calculation for determining the economic security level is shown in more detail on the example of the technical and technological direction of the enterprise, which involves active innovation. The resulting calculations prove the high impact of successful innovations on the economic security of an economic entity due to the priority of this area of activity, as well as the possibility of extracting a significant share of profit. Thus, the article proves the statement about the feasibility of evaluating the innovative potential of the enterprise, as well as analyzing the level of its compliance with the requirements of external and internal environments.

Monitoring of productive and biochemical parameters of young Clarias gariepinus during feeding of Skretting and Roycher AQUA feeds in experimental conditions

The article presents the results of monitoring the productive and biochemical indicators of the growth rate of young clary catfish using dry extruded complete feed for fish, which have proven to be best adapted for use at all stages of growing clary catfish, namely: Skretting and Roycher AQUA in experimental conditions. The research was conducted in the educational and experimental laboratories of Bila Tserkva National Agrarian University from 2019 to 2021. For the experiment, we used the young of the African marble clary catfish (Clarias gariepinus), purchased from one of the fish farms in the Odesa region. Clary catfish fry was kept in four rectangular plastic containers for 90 liters of freshwater. The tanks were two-thirds full (60 liters). The water temperature was maintained at 26 °C. For the experiment, 120 fries were used, which were kept in four plastic tanks by the method of analogs of 30 specimens each. Given that the fry differed in weight (for experiment 1 we selected fry with higher weight, and for experiment 2 – with lower weight), they were divided on the principle of analogs into two experimental and two control groups. Based on the results of monitoring in Experiment 1, fish observations, and mathematical calculation, we found that the feed ratio when fed Skretting and Roycher AQUA starter feed is 0.74 and 0.99 %, respectively. Based on the results of monitoring, fish observations, and mathematical calculation, it was found that the feed ratio in experiment 2 when feeding starter feed Skretting and Roycher AQUA is 0.75 and 1.54 %, respectively. The high feed rate for the use of Roycher AQUA can be explained by overuse due to the grinding of the granules. Growing aquaculture facilities in an artificially formed system – production, allows you to get environmentally friendly fish products all year round. This is a very important criterion in modern environmental conditions.

EXPERIMENTAL AND MATHEMATICAL JUSTIFICATION OF THE APPLICATION DIGITAL TECHNOLOGIES FOR RECORDING THE POSITION OF THE LOWER JAW DURING TOTAL PROSTHETICS USING DENTAL IMPLANTS

Subject. When prosthetics of toothless jaws are performed, the physiological position of the lower jaw must be determined before the final structures are made. In some cases, the use of temporary prostheses for several weeks may be useful to check for a new occlusion in a centric relationship. When the correct ratio is achieved, it is difficult to transfer them from the preliminary prostheses to the final ones. This article presents a case and a technique used to communicate information about the position of the lower jaw using a digital workflow. To determine the optimal position of the lower jaw, a computer tomogram of the temporomandibular joint was used to mathematically measure the correct position of the head of the lower jaw. Purpose. To describe a technique designed to transfer the inter-occlusal relations of the upper and lower jaws, using digital technologies in the prosthetics of full adentia using dental implants. Methodology. On the example of a clinical case of rehabilitation of a patient, total removal of failed teeth was performed, followed by prosthetics of complete adentia with the installation of six implants on the upper and lower jaws. After the completion of the integration period, a cone-beam computed tomography was performed with the capture of the temporomandibular joint, and a scan of plaster models with installed gum shapers was performed. The obtained data were compared in a specialized program for mathematical calculation of the optimal position of the lower jaw. This information was used to produce registration templates for the manufacture of fixed structures supported by implants in the resulting central jaw ratio. Results. A digital protocol for determining the central ratio of the jaws allowed us to transfer the information obtained in a virtual model of the temporomandibular joint to a permanent restoration based on implants. Conclusion. The approach described in this article predictably conveys information about the optimal position of the lower jaw during prosthetics and allows you to perform the final restoration on implants with optimal occlusal ratios, based on a mathematical calculation performed in specialized programs.

Safe Distance Mathematical Calculation and Quantitative Analysis on Covid-19 Using Einstein Equation and Gaussian Distribution

Most of the diseases caused by virus mainly spread through droplets in the air. The pathogen bearing droplets go deep into people’s lungs and cause infection. In this paper, we analyze the safe distance, the minimum range to keep droplets containing virus particles from entering lungs, and thereby carrying the virus inside the lung. Einstein equation for diffusivity of a particle and the wide of the Gaussian distribution of the particles in Brownian movement are used in the calculation of the range a virus-containing mucosal vary droplet can reach. Moreover, we used datas recorded in a previous paper named “Visualization of sneeze ejecta: steps of fluid fragmentation leading to respiratory droplets” by B. E. Scharfman et. all to generate our results.

Пространства Марины Цветаевой

The hallmarks of space in Tsvetaeva’s poetic world are vertical orientation, two-worldness (many-worldness), measurability, and “immensity”, often expressed by asymmetry. Tsvetaeva’s model of the double world is presented both in its pure form and in a multilayer one (the model of “matryoshka” according to Lotman) with a hierarchical vertical correlation of spaces. The vertical sets the plots, stylistics, system of characters, system of time and expectations of the reader. Tsvetaeva is a bright representative of irrational tendencies in art, which manifest themselves against the background of rational ones, through their violation. Thus, The Attempt of a Room (1926) builds on an imaginary effort to present a hexagonal box of a rendezvous, but fails. The last poem I Keep Repeating the First Verse… (1940) is a poetic reaction to the “mistake in counting”: there should be not six but seven souls at the table. In one of her poems, Tsvetaeva calls herself “one who has edited the miracle with numbers”. This formula aphoristically expresses the nature of creativity asfirst intuitive search, and then rational design. The mathematical calculation of the composition of her books is an analogue of the metric-stanzaic “frame” of her lyrics. In the given proportions she often uses a deliberate failure by one unit (for example, in the collection From Two Books she adds one extra poem, which was originally missing in these two books).

True Dawn: the defi nition by the Sharia and the terminology of astronomers

The object of the research is the problem of determining the exact time of the True Dawn onset (al-fajr as-sadik), with which the rituals of fasting and praying begin in Islam, as well as the completion of the rite of standing (wukuf) on Mount Arafat during the Great Pilgrimage (hajj), and its diff erence from the so-called “False” Dawn. (al-fajr al-kazib). The paper presents the Hadiths describing the signs of these two astronomical phenomena and reveals the results of visual observation of the onset of the True Dawn’s exact time in a number of Arab countries and in the Republic of Dagestan according to the mathematical calculation of the angle of the Sun inclination and the degree of the Sun position (azimuth) towards the horizon of the observed terrain during the true dawn. The study was based on the determination of the onset of the morning prayer exact time according to the methodology of mathematical calculations by astronomers of the early and late periods, and of the authoritative Muslim jurists (faqihs) as well.