Перегляд за автором "Khovrat, A."

Зараз показано 1 - 2 з 2
  • Зображення мініатюри
    Публікація
    Study of prediction and classification models in the problems of diabetes among patients with a stroke in different living conditions
    (ХНУРЕ, 2023) Huliiev, N.; Peretiaha, M.; Khovrat, A.; Teslenko, D.; Nazarov, A.
    The subject of the study in the article is the methods of predicting the development of diabetes. Diabetes mellitus is a non-communicable disease that has affected 425 million people, and by 2045 the number will only increase by 1.5 times. It has been proven to be an independent contributing factor to stroke development. When there is too much sugar in the blood, it negatively affects the arteries and blood vessels. People with this disease are more likely to develop atherosclerotic plaques and blood clots, which can lead to heart blockage and ischemic stroke. Having diabetes increases the risk and worsens the course of a stroke. According to the Framingham Study, the number of recurrent cases doubles. The aim of the study is to investigate methods of predicting and classifying the development of diabetes among people, in particular stroke patients, to prevent the development of other diseases. The complexity of the problem lies in the fact that there are as many undiagnosed cases as diagnosed ones, so about half of people suffer from the disease and the resulting complications due to improper or delayed diagnosis. Therefore, timely diagnosis of a disease that is difficult to detect is important in order to prevent the development of further complications. The article solves the problem of a multi-criteria task of choosing the best algorithm for predicting the occurrence of a disease. The following methods are used in this paper: multilayer perceptron, k-nearest neighbors method, decision tree, and logistic regression. Nowadays, machine learning has begun to apply to similar problems. In the 1950s and 1960s, there were attempts to combine the approaches to creating neural networks that existed at the time, which made it possible to calculate quantitative descriptions of human intelligence, and memorize, analyze, and process information, which resembled the work of the human brain. Medicine is one of the main areas of human activity where various classifier and neural network algorithms are gaining popularity yearly. They are trendy in disease diagnostics. Results: the initial conditions for choosing the best model are met by logistic regression. Conclusions: as a result of the study, the optimal model for predicting the development of the disease was selected.
  • Зображення мініатюри
    Публікація
    Theoretical and experimental study of the economic behavior irrational component of ukrainian society in specific markets
    (ХНУРЕ, 2023) Khovrat, A.; Teslenko, D.; Huliiev, N.; Kyriy, V.
    The subject matter of the article is the theoretical-methodical and applied principles of behavioural economics and their implementation in Ukrainian society. The goal of the work is to analyse the theory of irrationality in the economic context to find out what its character is in modern Ukrainian conditions, as well as to confirm the main paradoxes inherent in the individual’s decision-making behaviour. The following tasks were solved in the article: highlighting important aspects of the theory of irrationality for experimental analysis; determination of the methodology of experiments based on internationally recognized works; proposing a hypothesis regarding Ukrainian realities; conducting experiments according to the proposed methodology to test the proposed hypotheses and systematize the obtained results. The following methods are used: analytical and inductive methods for determining the set of behavioural experiments and building hypotheses regarding their results; experimental method and method of mathematical processing to check the presence of selected behavioural deviations in Ukraine. The following results were obtained: it was determined that in Ukrainian society there is a difference between the degree of individualistic attitudes in different age groups; determined change in the perception of information of different generations as a result of more significant digitization of the young population; a higher tendency of children to risk for certain conditions is determined; the similarity of the obtained results of the experiments with the global ones are established and the impact of technologies on the economic behaviour of individuals and the peculiarities caused by the historical context and expanded access to information, in general, are determined. Conclusions: the use of analytical and inductive methods in combination with an experimental approach confirmed the existence of some of the classic behavioural patterns for modern Ukrainian society, in particular: the Allais paradox, the effect of bounded rationality, the effect of joining the majority, the effect of ownership and asymmetric dominance. In addition, based on the obtained results, it was determined that for Ukraine there is a significant difference between the nature of irrationality in different age groups, however, the postulation of this statement beyond the selected target groups requires additional research, as well as consideration of the context of other market entities.