Student Criteria Research Articles

ИНДИВИДУАЛЬНАЯ ИЗМЕНЧИВОСТЬ МОРФОЛОГИЧЕСКИХ ПРИЗНАКОВ ЛИСТВЕННИЦЫ ПОЛЬСКОЙ В УСЛОВИЯХ ИНТРОДУКЦИИ

Polish larch trees are among the most valuable among forest species both in natural growing conditions and in the conditions of introduction. However, its taxonomic status is not fully resolved due to the similarity in morphological features with European and Siberian larch. We conducted a comparative analysis of these species of larch on the morphological features of cones and needles. The studies were carried out in the conditions of introduction in the center of the European part of Russia. We present the average value of the trait (XSR ± Sx) and the degree of its variation (V %). The reliability of the difference between the samples according to these characteristics was determined based on the calculation of the student's criterion t. As a result, we found that the Polish larch has smaller cones and significantly differs from the European and Siberian larch in all studied features (length of cones, width of cones, number of scales in cones, length of needles). These results indicate the isolation of the Polish larch, but this pattern can be expressed not only when referring to the Polish larch in the rank of an independent species – Larix polonica Racib., but also as a subspecies of European larch (Larix decidua var. polonica (Racib. ex Wóycicki) Ostenf. & Syrach).

ОЦЕНКА ЭПИДЕМИОЛОГИЧЕСКОЙ ОБСТАНОВКИ ПО ТУБЕРКУЛЕЗУ НА УРОВНЕ СУБЪЕКТА

Significance. The current epidemiological situation of tuberculosis in Russia has a negative trend. It is influenced not only by medical, but also by demographic, socio-economic, environmental and other factors. Purpose. Identify the most important socio-economic and environmental factors of organization and effectiveness of anti-tuberculosis measures, which influence the main epidemiological indicators of tuberculosis. Material and methods. The study was conducted by processing and analyzing materials of the state statistical reporting of the Ministry of Health of the Russian Federation for the period 2016-2018. The method of Pearson correlation analysis with matrix construction was used. Calculations were performed using Statistica 6.0 package. Significance of differences was determined by Student's criterion. Differences were considered statistically significant at p ˂ 0.05. Results. The epidemiological situation of tuberculosis in the Trans-Baikal Territory has a positive trend. Quality indicators of detection, diagnosis and treatment of tuberculosis in the region are characterized by improvements. The study has identified: a strong direct correlation between the share of areas not equipped with water supply and sewage and such indicators as: incidence of tuberculosis among adults, tuberculosis prevalence, and feedback on coverage of children aged 1-14 with immunodiagnostics; a direct correlation between the share of housing without central heating and prevalence of tuberculosis; an inverse correlation between the number of sports facilities and the level of tuberculosis incidence and tuberculosis prevalence among adults; and a strong direct correlation between air pollution emissions and incidence of tuberculosis among adolescents. Conclusion. The correlations identified confirm that tuberculosis is socially and economically determined, making it possible to identify risk factors for deteriorating epidemiological indicators of tuberculosis and substantiating a system of measures aimed at improving organization of TB care delivery to the population of the Trans-Baikal territory.

INFLUENCE OF INTERNET DEPENDENCY ON YOUTH SELF-ACTUALIZATION

The purpose of the article is to analyze the influence of the Internet dependence of teenagers on the peculiarities of their self-actualization and to check the effectiveness of the developed program for increasing the self-actualization of such persons. The study involved 223 individuals. The following research methods were used in the work: testing (Kimberly Young Test, CAT Test and Situational Self-actualization Test), questionnaires, observations; statistical methods for carrying out qualitative and quantitative analysis of the research results (Student's criterion and Pearson criterion). Based on the data obtained, we have developed a program of psychological support for the self-actualization of youths by developing its competence in using Internet resources. The article shows that different uses of virtual space by young people affect their self-actualization in different ways; the social and psychological factors of increasing the virtual space utilization of young people have been found out. In the course of an empirical study carried out, the authors prove the statistically significant relationship that exists between the excessive capture of the personality of the youth by virtual space and its self-actualization. The analysis of the influence of various variants of use by young men of the virtual space (games, communication, information seeking) revealed a significant difference in the priority of the gaming activity of youth as a factor in the formation of Internet dependency and low self-actualization of the individual (the latter is understood by the authors as an integral individual indicator of personal growth of a person).

Hygienic substantiation of calculating models for predicting toxicity of different classes insecticides (first part).

This work is the first part of our study to develop alternative experimental mathematic models for predicting toxicity of insecticides. In the first stage, calculations will be carried out and the most reliable models will be proposed. In the second – a statistical analysis and comparative estimation of the toxicometric parameters obtained experimentally and calculated according to the proposed equations. The purpose of the research is the scientific substantiation of the calculation models for predicting toxicity of insecticides of different classes. Data on the physico-chemical properties and toxicometry parameters of fungicides are taken from the PPDB pesticides database. Insecticides of such chemical classes as derivatives of tetram and tetronic acids, benzoylureas, carbamates, neonicotinoids, pyrethroids, organophosphorus compounds, avermectins were selected for analysis. It has been established that there is a significant positive correlation between NO(A)EL in the chronic experiment of all insecticides, the median lethal doses at oral administration (LD50 per os) of pyrithoids and neonicotinoids, and the molecular weight (at p<0.05). There is a significant negative correlation between the toxicometry parameters of all insecticides and their individual groups (pyrithoids, neonicotinoids, organophosphorus compounds) and melting temperature and the octanol-water partition coefficient, log Po/w (at p<0.05). It is proved that the proposed calculation models for predicting insecticide hazards are adequate according to Fisher's criterion, and the coefficients of regression equations are reliable according to Student's criterion (p<0,05).

The medical demographic characteristics of health status of population of the Trans-Baikal Krai

The demand for research in the context of identifying the relationship between socioeconomic factors and the medical and demographic indicators of individual regions is conditioned by continuing deterioration of the health status of population of the subjects of the Russian Federation, which occurs under the influence of unfavorable environmental factors. The purpose of research is to carry out comprehensive analysis of the medical and demographic indicators of population health of the region in 2012-2017, taking into account the influence of regional health factors. Materials and methods. The study applied such research techniques as the Pearson's correlation analysis with matrix construction. The processing was performed using the software Statistica 6.0. To test the hypothesis of normal distribution, the Shapiro-Wilk criterion was applied. The significance of differences was determined by the Student's criterion. The differences were considered statistically significant with p<0.05. The study used data of the State statistical Report of the Ministry of Health of the Russian Federation in 2012-2017. The results. The study established that the Trans-Baikal Krai is characterized by a decrease in population size up to 1.9%, a decrease in the birth rate up to 18.5%, a significant decrease in natural growth, an average mortality rate and an increase in life expectancy by 4.89%. According to the Human Development Reports, the Trans-Baikal Krai takes the 76th position among the regions of the Russian Federation. The comprehensive assessment of the socio-economic conditions of the region allowed to identify the factors with the maximum degree of influence on the condition of public health, among which the resource characteristics of the regional health system are of significant importance, that determines the need for long-term study of the effect of these indicators on the level of regional health.

Comparative study of the effectiveness of antihistamine preparations in the treatment of patients with atopic dermatitis

The objective of the study – to determine the comparative effectiveness of І-generation antihistamines and active metabolites of II-generation in treatment of patients with atopic dermatitis. Materials and methods. The study included 40 patients with atopic dermatitis. SCORAD scale was used for the assessment of the disease severity and Ukrainian translation of the Dermatology Life Quality Index – for the quality of life assessment. Patients were randomized into two groups that received I generation antihistamines and active metabolites of the II generation. Student's criterion or Wilcoxon criterion was used for statistical analyses. Normality of data distribution was verified using Shapiro–Wilk criterion. Results. A high ΔSCORAD (%) was observed in patients, who used I generation antihistamines. The significantly higher DLQI was in the group which used active metabolites of the II generation. ΔDLQI (%) was significantly lower in patients from the comparison group compared with individuals from the main group. Significant differences in neuroticism and state anxiety were obtained in patients from main and comparative groups with lower values in patients taking I generation antihistamines. In the group of patients before the start of treatment, the state of subdepression was noted, and in those of the main group there were no depressive symptoms at the end of the course of therapy. Conclusions. First-generation antihistamines are more effective in the treatment of atopic dermatitis compared to the active metabolites of second-generation, as evidenced by significant differences in SCORAD, ΔSCORAD (%), the severity of pruritus between groups of patients after completion of treatment. I-generation antihistamines indirectly have a positive effect on the quality of life, anxiety, depression and neuroticism, which explains the need for their priority choice in the treatment of atopic dermatitis.

An Investigation into the Criteria Students Use When Selecting Graded Readers

Material selection is one way through which students are empowered to take a more active role in their language learning. With the shifting of responsibility to the students, however, it is important to understand what criteria students are using in the material selection process. This study investigates the criteria students used when making graded reader selections for the extensive reading component of freshman level reading and writing courses at a university in Japan. Data from surveys showed that few students proved able to consistently make selections that met their expectations and that even after multiple book selections, some students continued to struggle with the task. The paper will conclude with suggestions for assisting students to make more informed choices when selecting graded readers.

Prevalence of anemia in patients with ankylosing spondylitis and peculiarities of hemopoiesis and ferrokinetics, depending on the degree of anemia

Anemic syndrome is a frequent complication of ankylosing spondylitis (AS), worsening the course of the disease and prognosis. The purpose of this work was to determine the frequency of anemia, relationship with age, sex and duration of the disease, as well as the peculiarities of hemopoiesis and ferrokinetics in patients with AS. 118 patients with AS and 26 controls were examined. Hematologic parameters were determined on the apparatus of ERMA PCE-210 (Japan), indicators of ferrokinetics were determined on a biochemical analyzer Humalyzer 2000 using sets in accordance with the instructions of the manufacturer. Statistical data was processed using the Microsoft Office Excel statistical software package. The probability of the results was estimated using Student's criteria (probable results were considered at p&lt;0.05) and Fischer's criterion. Analysis of data showed that anemia was detected in 28.8% of patients. In 79.4%, anemia was mild, and 20.6% had an average degree of severity. Anemia was detected in 68.8% of women and 22.5% of men. Anemia was observed in 52.9% of patients with a disease duration of up to 5 years. According to cytometric indices, it is normocytic anemia in 55.9%, microcytic it is in 26.5%, and only in 17.6% is macrocytic. In patients with moderate severity of anemia, serum iron levels, ferritin and coefficient of saturation of transferrin were significantly lower, compared with light, and total iron binding capacity (TIBC) and sTfR levels were higher, p&lt;0.05. Thus, among patients with SAR, anemia is detected in 28.8% of patients with predominantly mild degrees. Anemia is more often diagnosed in women than in men. There is no relationship between age and the occurrence of anemia. In debut disease, every second patient has anemic syndrome. According to the cytometric characteristic, anemia is a mild degree of normocytic, and anemia of middle degree is microcytic. Patients with microcytic anemia had the lowest levels of iron, ferritin, coefficient of saturation of transferrin, and the highest levels of TIBC and sTfR.

VARIABILITY OF CONES AND SEEDSCALESIN PICEA SPECIES AND THEIR FORMS IN CONDITIONS OF THE CITY OF OMSK

The study addressedthe morphometric indicators of cones and seed scales, such as length, width, and weight (before opening and after drying). Similarly, seed scales were measured, the marginal lines were described, and the number of seed scales in the cones was counted. The summary tables showed significant differences in the length and width of cones (Student's criterion). The correlation analysis was used to quantify the association between various indicators and the seed scale size. The samples were collected in the Genze Dendrological Garden, a natural landmark of regional significance. The study was carried out usingMolchanov and Smirnov’s (1967) method in the summer-autumn period. Siberian spruce (both blue and green forms), Serbian spruce, Colorado spruce (green form), and Canadian spruce had medium and large cones, which indicates a high adaptive capacity of these species. The length of cones in blue-grey and golden forms of Colorado spruce was below the average, indicating a low adaptive ability of the introduced species in the West Siberian foreststeppe. The correlation analysis showed a moderate dependence of the weight of seed scales and the weight of cones after drying (K = 0.60). A small dependence was found between the weight of seed scales and the length of cone after drying (K = 0.39). The size of seed scales strongly correlated with the size of cones (K ˃ 0.8). Student's t-test did not reveal significant differences in the width of cones in the studied species and forms of spruce, except for green form of Colorado spruce as compared to Serbian spruce and Canadian spruce, and blue-grey form of Colorado spruce as compared to Canadian spruce , showing notable differences at 1% significance point. By the length of cones, the studied species can be categorized into twoessentially different groups, the first one including all forms of Siberian spruce and Colorado spruce and the second one including Serbian spruce and Canadian spruce .

STATISTICAL SIMULATIONS METHOD IN APPLIED STATISTICS

The new paradigm of mathematical research methods is based on the effective application of information and communication technologies both in calculating the characteristics of the methods of data analysis and in simulation modeling. Pseudo-random number generators underlie many modern data analysis technologies. To solve specific applied problems, researchers permanently develop the new methods for processing statistical data, i.e., measurement results (observations, tests, analyzes, experiments) and expert estimations. The properties of each newly proposed method must be studied. The intellectual tools are limit theorems and method of statistical simulations (Monte-Carlo method). In 2016, our journal opened a discussion on the current state and prospects for the development of statistical modeling, i.e., the theory and practice of applicating the method of the statistical simulations (Monte-Carlo method), and various variants of the simulation. The previous discussion about the properties of such generators was conducted in our journal in 1985 - 1993. This article is devoted to application of the statistical simulations method to the study of the properties of statistical criteria for testing the homogeneity of two independent samples. We consider: the Kramer - Welch criterion, which coincides with Student's criterion when sample sizes are equal; the criteria of Lord, Wilcoxon (Mann - Whitney), Wolfowitz, Van der Waerden, Smirnov, со 2 (Lehmann - Rosenblatt). It is necessary to set the distribution functions of the elements of two samples. We use the normal and Weibull - Gnedenko distributions. It is shown advisable to use the Lehmann - Rosenblatt со 2 test when testing the hypothesis of coincidence of the distribution functions of two samples. If there is a reason to assume that the distributions differ mainly in the shift, then the Wilcoxon and Van der Waerden criteria can be used. However, even in this case, the со 2 test may be more powerful. In the general case, apart from the Lehmann - Rosenblatt criterion, the use of the Smirnov criterion is permissible, taking into account the difference between the real level of significance and the nominal one. The frequency of the discrepancies of statistical findings based on different criteria is studied.

REMOVAL OF PHENOL FROM WATER BY BACILLUS SUBTILIS ONU551 BACTERIA, ADHESIZED ON THE CARRIERS OF DIFFERENT NATURE

Aim. Investigation of the efficiency of removal phenol from water by bacteria Bacillus subtilis ONU551 adhered on the carriers of different nature. Methods. The concentration of phenol in water was determined by extraction-photometric method using 4-aminoantipyrin. The significance of the differences between the mean values of the residual concentration of phenol in water was determined by Student's criterion at a significance level of at least 95% (p ≤ 0.05). Data processing was performed using the program Microsoft Office Excel 2003. Results. The ability of a B. subtilis ONU551 bacterial strain isolated from waste water produced by pharmaceuticals to oxidize phenol was experimentally established. The concentration of phenol in water during its treatment with free cells of the B. subtilis ONU551 bacterial strain in the amount of 5.5×105 CFU/ml for 5 days of exposure decreased from 200.0 to 112.0±5.5 mg/l (by 44% ), reaching maximum on the 15th day – the degree of phenol removal from water was 99-100%. Adhesion of B. subtilis ONU551 bacteria to the surface of natural (zeolite, peat, activated carbon, sand), synthetic (ceramic tubes, fibrous nozzles of the “VIYA” type) of carriers accelerated the removal of phenol from water 1.4–2.5 times , compared to the treatment of water by free bacterial cells. The residual concentration of phenol in water during its treatment with B. subtilis ONU551 bacteria adhered on sand and on “VIYA” type fiber packing decreased for 6 days from 200.0 mg/l to 9.0±0.25 mg/l and 6.0±0.54 mg/l, respectively (by 95–96%) and on the 11th day was at the level of maximum permissible concentration (0.001 mg/l). The degree of removal of phenol from water by B. subtilis ONU551 bacteria adhered on mussel doors, peat and zeolite at the end of cleaning (11 days) ranged from 87% to 99%; and reached 100% – when used as the carriers of activated carbon, ceramic tubes. Conclusion. The use of B. subtilis ONU551 bacteria adhered on natural and synthetic carriers – mussel shutters, peat, sand and fibrous attachment of “VIYA” type ensures 100% removal of phenol from water.

CU (II) ACCUMULATION BY MARINE NEUTROPHIL SULFUR-OXIDIZING BACTERIA

Aim: to determine the ability of neutrophilic sulfur-oxidizing bacteria to extract Cu (II) ions from aqueous solutions. Methods. The object of the study was the ability of marine sulfur-oxidizing bacteria isolated from the water of the Black Sea near the Odessa Bay to extract copper from aqueous solution. To study the metalaccumulating activity of sulfur-oxidizing bacteria, we have selected strains that were resistant to copper at the level of 0.01–0.02 mol/l. The initial concentration of Cu (II) in aqueous solution was 1 mM. The period of cultivation of microorganisms in aqueous solution containing copper was 10 days. The residual content of Cu (II) in aqueous solution was determined by the atomic absorption method on AAS-1 devices (Germany) and C-115PC Selmi (Ukraine) at the wavelength of 324.7 nm for Cu. The reliability of the results obtained was assessed on the Student's criterion with probability of p &lt;0.05. Results. It was established that sulfur-oxidizing bacteria isolated from the water of the Black Sea capable of accumulating heavy metals from aqueous solutions, and Cu-accumulating activity depends on the duration of the interaction between microorganisms and solution. The maximum level of extraction of Cu (II) from aqueous solution was equal 89.24% was recorded on the 10th day of cultivation using a strain of Thiobacillus sp. DKZ_4. On the seventh day of cultivation, the extraction of Cu (II) from aqueous solution with using a strain of Thiobacillus sp. DKZ_2 reached 85.25%. It was shown that the level of resistance to copper, which had been previously defined, did not affect the ability of bacteria to accumulate copper. Conclusions. Neutral sulfur-oxidizing bacteria isolated from the water of the Black Sea are capable of extracting from aqueous solution from 22.83% to 89.24% of Cu (II) and therefore they can be used to develop biosorption biotechnology especially in the field of water purification from heavy metals. The ability to accumulate Cu depends on the strain, but does not depend on MIC.

Mathematical processing of results experimental studies of low-temperature modes of drying of capillary-porous materials of spherical shape

The mathematical processing of experimental data obtained during the drying of spherical form of capillary-porous materials on a convective drying bench allows us to determine the influence of various factors on the process.&#x0D; The main factors influencing the kinetics of drying of capillary-porous materials of spherical shape are the temperature and velocity of the heat carrier, as well as the initial moisture content of the material. For each factor, the variation levels corresponding to the optimal conditions for conducting experimental studies with low-temperature drying conditions are recommended.&#x0D; For a mathematical description of the duration of drying of capillary-porous materials, we use an orthogonal composite plan of the second order. As a result, the proposed mathematical model of the process obtained regression equations and the response surface of the duration of drying of capillary-porous materials of spherical shape.&#x0D; The obtained regression equations of the drying time give a detailed description of the influence of both individual and joint actions of factors, the significance of these parameters is determined by the corresponding coefficients according to Student's criterion.&#x0D; Also, the adequacy of the mathematical model according to Fisher's criterion, which corresponds to the real object, is checked.&#x0D; The construction of the response surfaces of the drying time of capillary-porous materials indicates the nature of the effect of these factors in the given range of variation.

Ecological and toxicological assessment of the influence of the chemical enterprise on soil

Technogenic pollution of the territory firstly leads to decrease of productivity of the land, since the main part of the technogenic loading, as a result of such pollution, assumes to the soil and vegetation. Soils those have been contaminated are characterized by changed structural and physical-and-chemical properties, which does not allow them to be used for economic purposes. To detect the technogenic loading on the soil as a result of the chemical plant operation, soil quality studies were carried out using the bio-testing method. The most informative data towards ecological danger of ecosystem pollution is the results of the determination of phytotoxicity for soil organisms. Such information can be obtained by an integral assessment of the biological usefulness of the habitat of organisms using the bio-testing method, which provides registration in controlled, standard conditions of the corresponding reactions of test organisms to the toxic effects of ecologically hazardous chemical compounds and their mixes. The following higher plants were selected as test cultures: Raphanus sativus L., Hordeum vulgare L. and Triticum aestivum L. As the test-response of higher plants, the energy of seed germination, the length of the sprout and the length of the root were taken into account. Four zones were selected for the research. The largest difference between the values of germination energy between control and experiment was observed on the results of a test-response to Hordeum vulgare L. in a sample of soil from zone Nr 4. The indicator of the toxic effect detected on the territory of zone Nr 4 - 43,64% reduction in the length of the roots relative to the control; 33.81% reduction in the length of the germs relative to the control based on the results of the test-response to Hordeum vulgare L. The soil sample from the zone Nr 1 showed no toxic properties in any test reaction (6.32% decrease in root length relative to control one, 5.68% reduction length of germs relative to the control one based on the results of the test reaction on Raphanus sativus L. Sample of soil from zone Nr 2 did not show toxicity (-45.26% decrease in root length relative to control one and 8.61% decrease in germination length relative to control one revealed by the results of the test-response to Raphanus sativus L. Soil samples from zone Nr 3 also showed no toxicity (3.83% decrease in root length relative to control and 11.02% reduction in germination length relative to control revealed by test-reaction results on Raphanus sativus L. The table value of the Student's criterion for the probability level is P = 0.5 and the number of measures of freedom 58 is 2.01. The calculation of the actual value of Student's criterion for the length of the roots (2.68) and the germs (2.05) showed an excess of the table value based on the results of the test-response on Hordeum vulgare L. in the soil sample from zone Nr 4, what confirms the presence of toxic properties of the soil. In order to assess the risk of soil contamination, the "measure of soil contamination" indicator was used in accordance with defined levels of inhibition of growth processes, the quantitative characteristics of which are expressed by the soil contamination coefficient, while the soil contamination coefficient is differentiated according to the levels of inhibition of growth processes. According to the calculated data, in the sample Nr 4, the phytotoxic factor or percentage reduction in the length of the roots relative to the control is 43.64% based on the results of the test-response to Hordeum vulgare L. By level of contamination, the soil is moderately polluted, belongs to the III class of quality and shows the measure of contamination of 1,3. Soil samples №1, №2 and №3 showed no toxicity (А˂20), i.e., they are non-contaminated and belong to the I class of quality. Therefore, for the integrated assessment of soil quality, in addition to chemical indicators, it is recommended to use integral indicators, in particular phytotoxicity of the soil, which characterizes the biological usefulness of the habitat of organisms.

Anthropometric Features of Ethnic Kyrgyz of Different Age Groups

The purposeof this study was to develop data about growth-weighted indexes of men of youthful and Mature age, ethnic Kyrgyz.Material and methods. 955 men of youthful and Mature age, ethnic Kyrgyz living in Osh and its vicinities, practically healthy were examined. The method of complex anthropometry included estimation of 21 parameters necessary for somatotyping. The length and weight of the body were determined. Morphometric data processing was carried out with the help of statistical programs Microsoft Excel and STATISTICA 6.0 package. The differences between the two compared values were considered reliable according to the student's criterion at p &lt; 0.05.Results. Somatotyping of men showed predominance of abdominal somatotype, with a minimum percentage of breast somatotype. The analysis of growth-weight indicators in different somatotypes showed that regardless of the somatotype, the length of the body increases slightly during the transition from adolescence to the 1st period of adulthood, which is explained by the continuation of growth processes. A slight decrease in body length in the 2nd period of adulthood is due to natural physiological processes and is a proven age-dependent fact.Conclusion. In the result of the study shows the distribution in the relative number of different somatotypes of men in the Kyrgyz population; shows the age and somatotypological characteristics of height and body mass that has significant scientific and practical importance.

Transformation of the International Programs Participants’ Meaning Sphere Caused by the Cultural Shock

In the article the influence of the phenomenon on the transformation of the international programs participants meaning sphere is analyzed. The results of empirical research of meaning fields, self-consciousness and all life activities of the participants are presented before and after the international internship. The aim of the research is to reveal the specifics of influence of the “cultural shock” phenomenon on the transformation of the international programs participants meaning sphere. The Research Object: the transformation of the international programs participants meaning sphere. The Research Subject: cultural shock as the source of the transformation of the international programs participants meaning sphere. Hypothesis: the transformation of the international programs participants meaning sphere on completing their internship will be inference in: the growth of the life awareness level, stabilization of the mental condition, development of the inner world, increasing of tolerance and independence level. The Research Methods: Theoretical: analysis of scientific and psychological literature on the investigation topic; Empirical methods and techniques: A. Leotyev Test on life-meaning orientations (modified variant); G. Bazhin, N. Etkind Personality Differential (modified variant); Questionnaire on the self-assessment of psychic activation states, interest, emotional tone, tension and comfort; Questionnaire processed by the content-analysis method; The Technique of Limiting Meanings by D.A. Leontyeva; The Technique Who am I? by M. Kuhn, processed by the content-analysis method; 3) Methods of mathematical statistics: t - Student's criterion, - Pearson's criterion, criterion - Fisher's angular transformation. The study was conducted on the basis of the S. Amanzholov East Kazakhstan State University, the city of Ust-Kamenogorsk. Under the research there were 50 people - participants of the international programs: 10 people - participants of the Turan-Profi program and 40 people - participants of the Work and Travel USA program. Key words: cultural shock, meaning sphere of personality, transpective analysis, intercultural adaptation.

Multielement analysis of tea by X-ray fluorescence spectrometry with full external reflection

The main goal of this work was to assess the analytical capabilities of the full external reflection X-Ray Fluorescence Spectrometry method (TXRF) in the analysis of tea leaves and their infusions. As objects of the research, 19 samples of various sorts of Krasnodar tea were used. Two techniques of sample preparation were employed based on an open vessel acid digestion and a preparation of the suspension. The results of the certified standard tea sample analysis confirmed the possibility of the quantitative determination for the following elements: Mg, P, S, K, Ca, Fe, Ni, Cu, Zn, Br, Rb, Sr, Ba, and Pb. The best measurement results were achieved using the acid digestion technique. The analysis of the suspension could be carried out during the determination of elements such as Ca, Ni, Cu, Zn, Br, Rb, and Sr; for other elements, matrix effects were the interfering quantification factor. It was also found that the reliable determination of volatile elements, such as Cl and Br, was possible only when analyzing suspensions. The overall measurement uncertainty, including all stages of analysis, for most of the elements averaged to no more than 16%. The wavelength dispersive X-Ray Fluorescence method was used as a comparison method for the obtained measurement data of Krasnodar tea samples. The comparison was made using the Student's criterion and the convergence evaluation, based on which it was concluded that the data was in the good agreement for most of the elements. In addition, the analysis of tea infusions prepared according to the consumer procedure was carried out in order to study the solubility of the various elements and assess the quality and safety of tea. The results could be used in the laboratories for the quality control and for the assessment of the chemical composition of tea. Key words : X-ray fluorescence, TXRF, WDXRF, tea, infusion, multielement analysis DOI: http://dx.doi.org/10.15826/analitika.2019.23.2.009 (Russian) A.S. Maltsev 1, 2 , D.S. Sharykina 1 , E.V. Chuparina 3 , G.V. Pashkova 1 , A.G. Revenko 1 1 Institute of the Earth’s Crust, SB RAS, Lermontov st., 128, Irkutsk, 664033, Russian Federation 2 Kazan National Research Technological University, Marksa st., 68, Kazan, 420012, Russian Federation 3 Vinogradov Institute of Geochemistry, SB RAS, Favorsky st., 1A, Irkutsk , 664033, Russian Federation

Оптимізація міжпредметних зв’язків при формуванні компетенцій з безпеки у фахівців радіотехнічного профілю

In this paper a study was conducted to determine the optimal sequence of teaching disciplines, the life safety and the bases of labor protection during the training of specialists in radio engineering according to the criterion of the strength of interdisciplinary connections of these disciplines. It was established that in the different academic years the sequence of teaching of disciplines the life safety and the bases of labor protection during the training of specialists in radio engineering at Vinnytsia National Technical University was different. The following variants of the sequence of teaching disciplines were considered: life safety and the bases of labor protection: the study of disciplines in parallel in one semester, the study of the initial discipline of life safety, and in the next semester – the bases of labor protection, the study of the discipline of the bases of labor protection, and in the next semester – the life safety. The research was conducted separately in two academic groups with different levels of success, where students received grades on a 100-point scale from different disciplines. The comparison of variances of different samples was performed according to Fisher's criterion. Determination of the strength of interdisciplinary connections is carried out by the correlation method. The calculation of the linear correlation coefficient took into account: the average and partial sample values of the comparable values, the total number of these values in the series of indicators, the variance, and the deviation of these values from the mean values. Homogeneity comparison of different samples and their belonging to one general population (future specialists of radio engineering profile) was conducted according to Student's criterion. Graphical interpretation of the obtained results is presented. On the basis of comparison and comparison of data, strong interdisciplinary connections are defined in all three studied variants of the sequence of studying the courses of life safety and the bases of labor protection. It was established that according to the criterion of the strength of interdisciplinary relations, the optimal sequence of teaching disciplines during the training of future specialists in the radio engineering profile is the teaching of the initial life safety, and then the bases of labor protection. The determined optimal sequence of studying the courses of life safety and the bases of labor protection is confirmed by the definition of life safety as a discipline.

Проблеми при викладанні безпеки життєдіяльності в процесі підготовки фахівців радіотехнічного профілю

The study is conducted to determine the optimal semester for teaching the subject «Life Safety» during the training of future specialists in radio engineering. It is established that in different academic years the discipline «Safety of Life» during the training of future specialists of radio engineering profile at Vinnytsa National Technical University was taught in different semesters. The following semesters of teaching the subject «Safety of Life» were considered: in the 7th semester (autumn-winter semester of the 4th year), in the 8th semester (spring-summer semester of the 4th year), in the 3rd semester (autumn- winter semester of the 2nd year). The studies were conducted individually in two academic groups with varying degrees of success, where students received scores on a 100-point scale in the course «Life Safety». Determining the optimal semester of teaching the subject «Safety of Life» during the training of specialists in radio engineering profile was carried out on the basis of the criterion of average success in academic groups with different levels of success in the specified discipline. Comparison of the homogeneity of different samples and their belonging to one general population (future specialists of radio engineering profile) was performed according to Student's criterion. The calculated values ​​of the Student’s test were compared with the critical value for the 95% confidence level. A graphical interpretation of the results is given. Based on the comparison and comparison of data, it is determined that by the criterion of average success in academic groups with different levels of success, the optimal semester of studying the course «Life Safety» is 7 semester (fall-winter semester of the 4th year) in the preparation of future specialists in radio engineering. Establishing the optimal semester of teaching the subject «Life Safety» does not contradict the previously defined optimal sequence of studying the courses «Life Safety» and «Fundamentals of Occupational Safety»: first teaching the safety of life, and then the basics of occupational safety in different semesters, as it allows to study the discipline «Fundamentals of Occupational Safety» in the 8th semester (spring-summer semester of the 4th year).

Information Management: the Key Driver of the Economic System’s Development

In the scientific article, an information management model was developed for assessing the influence of regulatory tools on business processes on the example of the insurance market of Ukraine. The main purpose of the research is to determine the role of information management as a key driver of business process development in economic systems (on the example of the Ukrainian insurance market). Systematization literary sources and approaches for solving the problem indicates that the development of innovative tools of public governance for the assessment of the regulatory influence of the state regulatory body on the business processes of insurance market is not completed and requires a more in-depth study. The formation of a system of indicators characterizing the business processes of insurance market, which take into account the influence of the Regulator's tools, is proposed to be implemented in the following sequence: to find out the causal links between the indicators of business processes of insurance market and the measures; to determine the existence of the reaction of business processes’ indicators of insurance market to the Regulator’s measures, taking into account the time gap, which determines the presence of lags in the process of applying the Regulator's measures; to define and formalize the variability of the business processes’ indicators of insurance market under the influence of the Regulator's measures. Then the scale of the state of insurance market was built: firstly, check for normality the distribution of the indicators’ values of these markets; secondly, in compliance with the distribution law to construct the scale of indicators according to the «three-sigma rule»; thirdly, in the case of nonconformance with the normal distribution law and presence of skewness, the method of «three sigma» may be used, but either the arithmetic mean, or the mode of the variation series, or its median, is taken as the reference point. The relevance of the decision of this scientific problem is that a set of models is developed for establishing causal relationships between the indicators characterizing the business processes of the insurance market and government regulation instruments, which are quantitatively determined, are theoretical and practical basis for their possible application for solving universal modeling problems of causal processes of estimating the influence of the taken decisions at any regulation of business processes. To solve the problem the Granger-test, the expanded Dickey-Fuller test, the Phillips-Perron test and the Kwiatkowski-Phillips-Schmidt-Shin test were applied. Time series distribution on stationarity and construction of vector autoregression models are implemented. In order to evaluate the adequacy of the models, a comparison of values of Fisher's, Student's criteria, determination coefficient and adjusted determination coefficient is used. Jarque-Bera criteria are used to test the model for stationarity, stability. The formalization of cause-and-effect relationships through the postulate of the theory of measurements and the construction of scales is performed. The built interval scales are based on the application of the three sigma rule, which made possible to specify the allowable boundary values of the indicators. The obtained results testify the influence of regulatory tools on the business processes of insurance market, which confirms the correctness of the use of this complex of models for the solution of weakly formalized problems of causal nature of universal type. The proposed innovative model can be used as a methodology for developing a set of rational methods for assessing informational influences of management decisions in production systems or marketing research. The results of the research can be used to evaluate the business processes of any market or system. Keywords: business processes, Granger test, informational management, informational model, insurance key driver, services market, regulation tools, scaling, vector autoregression.