Kulish N.V., Arkhipenko T.V., Ryabova A.A., Balakin I.N.
PSYCHOLOGICAL DIFFICULTIES IN STUDYING MATHEMATICS BY TECHNICAL SPECIALTIES STUDENTS ^{[№ 1 ' 2024]}
Students often face psychological difficulties in studying higher mathematics. The reason for this problem is psychological blocks and a decrease in the number of classroom hours allocated to studying the discipline. All difficulties in learning mathematics can be caused by math anxiety, fear of failure or a low grade, lack of motivation, low self-esteem and lack of confidence in one’s abilities. Research on math anxiety in the medical field was reviewed, as well as the genetic component of the inheritance of math ability and the relationship between the environment and the learning process. To solve this problem, tips have been developed to combat anxiety. To determine the causes of psychological difficulties, we used empirical methods of cognition, namely a survey and description among students of technical areas of training. According to the survey and diagram, the main reasons for the occurrence of psychological difficulties in students were identified: fear of mistakes and failures, unsatisfactory experience in the past, confusion in basic terms and concepts, lack of motivation, insufficient support, fear of mathematical symbols, negative attitude towards oneself. Solving these difficulties often requires an individual approach, support from teachers and parents, and finding ways to make mathematics more accessible and understandable to the student. An important role is played by the absence of some topics in the study of the discipline. To identify such gaps, the authors of the study conducted a comparative analysis of the work programs of some educational institutions in the country where the discipline “Mathematics” is studied for the training direction 03/20/01 “Technosphere Safety”. Having analyzed the work programs of universities, we can conclude that in some universities there are not enough hours allocated for lectures, and there are also visible differences in topics that affect students’ mastery of the specialty. A survey was compiled for students in technical specialties to determine the most frequently used and effective method, according to students. As a result, it was revealed that the most popular method is sports and hobbies, and the most ineffective method is a diary of feelings.

Bazhina N.L., Ochur K.O., Ondar E.E., Zakharova E.G., Ryabova N.N.
HUMUS OF MOUNTAIN MEADOW SOILS OF WEST TUVA ^{[№ 12 ' 2017]}
Data on the humus composition of mountain meadow soils in the western part of Tuva, occupying the lower boundaries of the highland region of the Alashsky upland of the Western Sayan, the Shapshalsky ridge of the Western Sayan and the ridge of the Western Tannu-Ola, are summarized. Methodological features of the work consisted in the selection of soil samples, which was carried out in detail by a continuous column every 5–10 cm and(or) less within the visible boundaries of the horizons, as well as in the use of the microclimatic data: average annual air temperature, average annual precipitation and the sum of temperatures above +10 °C, calculated for each individual section, according to the regression equations derived for Tuva territory that include interrelationship of climatic characteristics with altitude above sea level, and taking into account the influence of the exposure of the slope and the wind rose. As a result of the analysis of generalized materials, the specific features of the humus composition of mountain meadow soils are revealed, depending on the ecological conditions of their formation. They consist of different contents of total organic carbon, the amount of humic acids associated with calcium, and the proportion of mobile fulvic acids in the composition of this component. At the same time, mountain meadow soils, irrespective of local conditions of functioning, within the uniform bioclimatic boundaries, have a humus-fulvate composition of humus with very close values of the ratio Cha:Cfa, which lie in the range of 0.77–0.99, but more than 50 % exceed the value of 0.9, and also a relatively high proportion of humic acids, bound clay minerals of soils (fr. HAIII), which is typical for soils that are affected by the processes of freezing. This does not contradict the generally accepted understanding of the humus composition of mountain meadow soils of other regions of Russia.

Dergacheva M.I., Bazhina N.L., Ondar E.E., Ochur K.O., Ryabova N.N.
ENVIRONMENTALLY INDUCED COMPOSITION AND PROPERTIES OF HUMIC ACIDS IN SOILS OF WESTERN TUVA ^{[№ 10 ' 2015]}
The correlation between the composition and properties of humic acids in western part of Tuva climatic parameters calculated for each individual object. It is shown that humic acids having a certain value of the ratio of H:C match as certain values of temperature and humidity (rain) at which the humic acids formed in such ratio of these forming elements.