Abstract Aim Although teachers in special needs schools do not always work long hours, their sick leave rate is higher than that of teachers in other types of schools. We aimed to compare the causes of stress between teachers in public special needs schools and different public schools and explore the stress factors among teachers in special needs schools. Methods An Internet‐based cross‐sectional survey was conducted between June and December 2021. We analyzed the data of 203,433 teachers with no missing values, including 15,159 teachers from special needs schools. Demographic variables, stress factors, psychological and physical stress responses, job satisfaction, and working hours were analyzed. Results Among high‐stress teachers, 30.4% of the special needs school teachers had difficulties with their relationships with their colleagues; these difficulties were statistically significantly more frequent than for teachers in other school types (15.1% in elementary, 17.6% in junior high, and 19.1% in high schools). Multiple logistic regression analysis revealed that high‐stress teachers in special needs schools were 1.82 times more likely than teachers in other types of schools to be stressed by their relationships with colleagues after controlling for age, sex, teaching experience, size of school, working hours per day, and job satisfaction (95% confidential interval = 1.65–2.01, Wald = 137.3, p ≤ 0.001). Conclusion The findings suggest that not only a reduction in working hours but also the cultivation of human relationships and a cooperative working environment in the workplace may be effective in eliminating stress among teachers in special needs schools.
The article examines the phenomenon of adolescents’ engagement with the Internet through the prism of parental perception. It analyzes how the digitalization of contemporary society influences adolescents, their interests, needs, and family social relations. The role of Internet is identified as both a space for socialization and a means of self-expression for adolescents, while also highlighting potential risks associated with excessive engagement, including internet addiction and exposure to harmful content. Based on the analysis of in-depth interviews, five primary types of parental attitudes toward adolescents’ engagement with the Internet were identified: “Internet use is the child’s own business”, “Internet use is beneficial for intellectual development”, “Internet use represents a lost childhood”, “Internet use is the price for staying connected”, and “Internet use is a reward for good behavior”. Special attention is given to the issue of parental control, particularly the phenomenon of “parental stalking” – monitoring children’s activity on social media as a means of ensuring their safety. The study distinguishes several strategies parents employ to manage adolescents’ excessive involvement in the digital environment: “Total phone content checks”, “Monitoring children’s social media”, “Complete absence of control”, “Checking specific apps”, “Setting time limits for Internet use” and “Phone confiscation”. The analysis of the transcripts of in-depth interviews demonstrated that although most parents recognize potential risks, effective strategies for regulating children’s digital lives are often lacking. Parental strategies range from strict control to no control at all over adolescents’ online activity. It is noteworthy that none of the parents mentioned the importance of increasing adolescents’ digital literacy. The findings can be used to create recommendations for building effective communication between generations in the context of the digitalization of society. The results obtained open up prospects for further research of the role of parental position in shaping the behavior of Ukrainian adolescents on the Internet, as well as the impact of various models of parental control on their emotional and social well-being.
Taher kouchaki tajani, Ali Mohtashami, maghsoud Amiri
et al.
In this paper, we have proposed a model based on Mixed Integer Non-Linear Programming for the blood supply chain under conditions of uncertainty in supply and demand, from the stage of receiving blood from volunteers to the moment of distribution in demand centers. The challenges addressed in this optimization model are the reduction of blood supply chain costs along with minimizing the shortage and expiration rate of blood products. The Markov chain has been used to address the uncertainty of donor blood supply. To estimate the needs of medical centers, the received demand is considered fuzzy. Then, the proposed model is solved in small dimensions by GAMS software and in large dimensions by Bat and Whale meta-heuristic algorithms, and the results are presented. In addition, a case study is presented to show the applicability of the proposed model. The results show a reduction in the level of costs as well as a reduction in the shortage and expiration of blood products in the supply chain.IntroductionOne of the important topics researched in the global healthcare systems of different countries is the improvement of supply chain performance. The health system has one of the most complex and challenging supply chains due to its direct relationship with human lives. Issues such as uncertainty in blood demand and supply, blood inventory planning, delivery schedule, ordering time, attention to expiration date, and limited human resources are among the challenging issues in the field of health, especially the supply chain of blood and blood products. A unit of blood, from the time it is received from the donor to the time it is injected into the patient as whole blood or blood product, includes many processes and challenges that must be taken into account to ensure the health of the blood and the health of the supply chain. Redesigning an existing blood supply chain is not possible in the short term due to significant costs and time required, so using existing facilities and optimizing conditions is more preferable than reestablishing equipment, blood centers, and other facilities related to the blood supply chain. In this research, by presenting a mathematical model, we try to optimize the tools and facilities in a blood supply chain. The important goal in the blood supply chain is the cost factor. The costs incurred on the blood supply chain include costs such as blood collection from volunteers, product processing and blood inventory costs in hospitals and blood centers, and blood transfer costs to demand centers. On the other hand, the balance in storage and waste reduction is also very important in this chain. High storage increases the amount of inventory (increase in cost) and also increases the rate of perishability (increase in cost) of blood products. It is important to pay attention to the fact that the reduction of costs should be accompanied by the reduction of shortages and waste. In addition to the lack of blood, improper distribution and untimely supply of blood to hospitals can be completely disastrous. Requests to blood centers are made under certain conditions, such that the requested product(s) are separated in terms of blood group or the presence or absence of a specific antigen. Paying attention to blood groups and compatibility indicators is one of the principles of blood transfusion, and not observing them can cause unfortunate events.Due to the disproportionate percentage of distribution of blood groups among volunteers, there has always been a possibility of a shortage in the supply chain. In the medical world, in case of a shortage of a blood product of a certain group, attempts are made to replace that product from groups that can be matched. This will reduce the shortage and save the lives of patients whose blood with the required blood group and RH is not available at the same moment. In order to solve this challenge, in the upcoming research, a solution based on the versatility of unanswered demands will be considered, which will be included in the mathematical model. Another important issue is the age of the demand for the requested product, which creates an age-based demand in the supply chain. (Some special patients need fresh or normal products according to the type of disease.)MethodologyIn this research, a comprehensive mathematical model has been developed in the form of a MINLP model. The research model is based on a comprehensive blood supply chain consisting of three components: collection, processing, and consumption of blood products. There are three types of collection centers in this model: first, vehicles that serve blood donors at predetermined locations and collect blood; second, fixed collection facilities located in some areas of the city that solely perform the task of collecting blood; and third, blood centers (blood transfusion centers) that perform both blood collection work and other tasks related to product processing, testing, and transfer planning to demand centers and hospitals. The next part of the model is related to the processing of the collected blood. In this part, the blood collected by the collectors in the blood center is aggregated, the percentage of each blood group is determined, and according to the need in the blood centers, products such as red blood cells, platelets, and whole blood plasma are sent to hospitals. It is worth noting that as blood is converted into other products, some characteristics of the product, including the age of the products, differ from each other. Therefore, in the continuation of transferring the products and responding to their demand, the age of the blood product will be considered. Additionally, it should be noted that the blood product requested from the demand centers is in two forms. For some special patients and in special surgeries, a series of blood products with a certain age (young blood) are needed. Therefore, the importance of the age of the blood sent to the hospitals is also seen in the model. In the real world, in the face of a shortage in hospitals, a solution is thought out, which is to use the principle of adaptability of blood groups. Through a pre-accepted adaptability matrix, a series of demands for blood groups g, in case of shortage, can be satisfied with the supply of blood groups f turn around. Deterministic supply chain network design models do not take into account the uncertainties and information related to the future affecting the supply chain parameters and as a result cannot guarantee the future performance of the supply chain because due to the inherent and fluctuating and sometimes severe change in the environment of many operating systems Parameters in optimization problems have random and non-deterministic characteristics. In this research, two different approaches have been used to face the uncertainty in blood supply and demand values. For the demand, a triangular fuzzy approach has been proposed. According to the conditions of uncertainty, the appropriate alpha cut is selected based on the opinion of the decision-makers, and the demand is adapted to the conditions. Regarding the amount of supply, in order to estimate the number of donors in future periods, we have used the Markov chain to predict the number of donors based on the records in the past.FindingsIn order to evaluate the presented model, it is necessary to solve the research in both small and large sizes to determine the reaction of the research target function to changes in the parameters of the problem. For this purpose, the research model was first coded in GAMS 24.1 software. According to the designed sample problems, up to a certain size, it is possible to solve the problem within a certain time frame using GAMS software. However, as the size of the problem increases and the time to reach the answer also increases, meta-heuristic algorithms such as WOA and BAT were employed to solve this problem. The results indicate that the Whale Optimization Algorithm (WOA) performed better. Subsequently, based on a case study, a problem was presented to illustrate the efficiency of the model and its solution method. The results obtained for the objective function and the values obtained for the main variables of the research demonstrate the effectiveness of the model and its solution approach.ConclusionThe purpose of this article is to design a comprehensive supply chain that includes three parts: collection, processing, and distribution of blood products. The supply chain comprises mobile and fixed blood collection units that receive blood from donors and send it to blood centers. At these centers, blood is processed into required products and then distributed to demand centers based on demands categorized as fresh or normal products. In this research, the objective was to minimize costs such as blood collection, blood inventory in blood centers and hospitals, as well as the cost of blood products expiring due to non-use. To address blood deficiency, the blood compatibility system was incorporated into the model. This system ensures that if a certain product of a certain group is not available, a compatible product from another group is sent as a replacement. The model was solved using the exact solution approach of GAMS software for smaller-sized problems. However, for larger-sized problems, meta-heuristic algorithms such as WOA and BAT were employed to achieve reasonable solving times. Additionally, a fuzzy coefficient was proposed for relatively accurate demand prediction, and the Markov chain and the Kolmograph left-hand theorem were utilized to predict the number of blood donors. The results obtained from small-sized problems using accurate solver algorithms, as well as medium and large-sized problems using WOA and BAT meta-heuristic algorithms, demonstrate the efficiency of the designed model. Finally, a sensitivity analysis based on changes in fuzzy coefficients of demand and coefficients, including the alpha cut transformation function, and its effect on the objective function are presented.
Mahziyar Akbari, Tohfeh Ghobadi Lamuki, Peyman Ghafari Ashtiani
et al.
Introduction: Augmented reality technology, which is one of the subsets of various types of developed realities, has attracted the attention of researchers and businesses in various industries and fields in recent years. These people, with a basic understanding of this technology, have benefited from its very high potential to be able to easily achieve their predetermined goals by using it. But in the meantime, the advertising industry and following that, the marketing field, have not yet seriously benefited from it. This issue is important when we know that the effectiveness of the current advertising approaches that are currently used in Iran and the world are decreasing day by day. People do not welcome the current approaches and are fleeing from them. In this case, it does not seem that these current approaches can help a business achieve its predetermined goals. Under these circumstances, there is a strong need for a new and alternative advertising approach. An approach that can eliminate the disadvantages of the common advertising methods in the best possible way and have a very high ability to attract and retain audiences. In this situation, augmented reality technology can play the role of a new advertising medium and act as a digital marketing approach to help marketers advance their integrated marketing communication goals.Objective: Based on the searches conducted among the academic articles available in the global research literature, no augmented reality advertising model based on smart mobile phones was found. Therefore, this study aimed to design and create an augmented reality advertising model based on smart mobile phones with a focus on the augmented reality activators existing on the product packaging. It sought to answer this question: What were the structures, dimensions, indicators and relationships in the mobile-based augmented reality advertising model based on the augmented reality activators existing on the product packaging and what was the final model of augmented reality advertising?Methodology: This research was a fundamental study because its goal was to design and create a mobile-based augmented reality advertising model. Also, because of its ability to use the results obtained from it, it could be classified as applied research. Moreover, since there was no augmented reality advertising model in the research literature, this study could be considered as an exploratory study. In addition, in terms of data collection, this research was a cross-sectional survey study. The implementation approach in this research was a mixed approach consisting of two qualitative and quantitative phases. The method used in the qualitative part of this research was the grounded theory approach using the model presented by Corbin and Strauss. In the first phase (qualitative) of this research, the prerequisites were set and the statistical population was identified according to these prerequisites. Then, using the judgmental and non-probabilistic sampling approaches, sampling was done until reaching theoretical saturation. The number of selected samples until the time of theoretical saturation for this research was 14 advertising-marketing experts. The data required to conduct this research were collected by semi-structured and in-depth interviews and were analyzed by three stages of open coding, axial coding and selective coding in Maxqda software. After that, the validity and reliability of the qualitative part were confirmed. In this phase, the essential indicators were identified and determined. In the second phase (quantitative) of this research, the screening and validation of the indicators identified in the previous part (qualitative) of the research were done. The approach used in this part was the fuzzy Delphi method. 15 experts were selected using the snowball sampling method and their opinions on the indicators of the qualitative part were assessed and evaluated. The fuzzy Delphi approach was a very suitable approach for validating the indicators using fuzzy numbers.Results: When executing the first phase of the research using the grounded theory approach and analyzing the data collected by semi-structured and in-depth interviews with 14 experts, the audio files of the interviews were converted to text and analyzed in the software. In the first phase, 5143 initial concepts were identified from the interview texts. Among them, 912 cases were unique concepts and were classified as sub-categories. By combining and reclassifying these sub-categories, we reached 59 main and distinct categories. Using the perspective of the grounded theory of Corbin and Strauss, these 59 main categories were categorized into 6 paradigmatic model structures. In this way, the dimensions, indicators and relationships of the mobile-based augmented reality advertising model based on the augmented reality activators existing on the product packaging were determined. In the second phase of this research, the opinions of 15 experts on these indicators and relationships with respect to the main structures were assessed using the fuzzy Delphi method. After running two rounds, none of the indicators were deleted and their validity was confirmed. Finally, the final model of the research was presented.Discussion and Conclusion: Augmented reality could be introduced as a revolutionary technology with cutting-edge technology. Using this technology in the advertising industry would have very important and valuable results for consumers, companies, brands, products, advertisements and society. However, this advertising approach was very influenced by the factors governing its environment. Marketers had to accurately identify these factors, which were introduced in this research as contextual factors and intervening factors, and create mobile-based augmented reality advertising platforms using the strategies presented in the strategic factors section. In this way, they could benefit from the very important and valuable results of it. It was suggested to different businesses and marketers that in order to create a very special competitive advantage for themselves and also to achieve victory in the current competition path in the advertising industry, they should start from today to recognize this technology and invest time, money, expertise and human resources in it and use mobile-based augmented reality advertisements in their commercial and integrated marketing communication efforts.
Introduction. The development of a mechanism for managing the investment process in industries is an urgent task for economists and practitioners in the current global economic situation. Each investment model assumes a unique approach to attracting investment and stimulating the growth of an industrial project. The choice of the model will depend on the specific goals of the business owners, the amount of available resources of the project, the industry in which the business entity operates. At the same time, the model may be aimed at cooperation between academia, industry and government to stimulate innovation and economic growth, the introduction of external ideas, technologies and partnerships to expand investment opportunities; the creation of regional innovation clusters to attract investment and strengthen cooperation between enterprises, researchers and governments; creating an environment that supports startups, investors, research institutes.Goal. The goal of the study is highlighting the prospects of applying a specific model of attracting investments for the industrial sector.Materials and methods. The study is based on the analysis of the tools for modeling the investment process at an industrial enterprise. The following methods were used: the monographic one, statistical grouping, simulation modeling, comparative and subject-object analysis.Results and discussion. In the course of the research, the structuring of information concerning all aspects of modeling investment processes in industry was carried out, suggestions were made on the types of models most relevant for use in the Russian Federation. The effectiveness of the collaboration of industry and the scientific community represented by leading universities in the framework of business design, the work of business incubators is proved.Conclusion. A rational and well-structured approach to attracting investments is crucial for the success of industrial projects. The triple helix model emphasizes cooperation, the open innovation model promotes external interaction, business incubation, clustering of the industrial sector, the formation of special economic zones, as well as the integration of the value chain. Using these models, large industrial enterprises can improve their investment attraction strategies and accelerate their own development, minimizing risks and stimulating innovation.
Elena S. Hafner, Karola Mészáros, Alexander Vidinas
The Alexander polynomial (1928) is the first polynomial invariant of links devised to help distinguish links up to isotopy. Fox's conjecture (1962) -- stating that the absolute values of the coefficients of the Alexander polynomial for any alternating link are trapezoidal -- was settled for special alternating links by the present authors (2023); Kálmán, the second author, and Postnikov gave an alternative proof (2025). The present paper is a study of the special combinatorial and discrete geometric properties that Alexander polynomials of special alternating links possess along with a generalization to all Eulerian graphs, introduced by Murasugi and Stoimenow (2003). We prove that the Murasugi and Stoimenow generalized Alexander polynomials can be expressed in terms of volumes of root polytopes of unimodular matrices. The latter generalizes a result regarding the Alexander polynomials of special alternating links that follows by putting together the work of Li and Postnikov (2013) and Kálmán, the second author, and Postnikov (2025). Furthermore, we conjecture a generalization of Fox's conjecture to the generalized Alexander polynomials of Murasugi and Stoimenow and bijectively relate two longstanding combinatorial models for the Alexander polynomials of special alternating links: Crowell's state model (1959) and Kauffman's state model (1982, 2006).
We study the effects of correlations in a random environment on a random walker. The dependence of its asymptotic speed on the correlations is a nonperturbative effect as it is not captured by a homogeneous version of the same environment. For a slowly cooling environment, the buildup of correlations modifies the walker's speed and, by so, realizes acceleration. We remark on the possible relevance in the discussion of cosmic acceleration as traditionally started from the Friedmann equations, which, from a statistical mechanical point of view, would amount to a mean-field approximation. Our environment is much simpler though, with transition rates sampled from the one-dimensional Ising model and allowing exact results and detailed velocity characteristics.
In this paper, we prove a transversality theorem for the moduli space of perturbed special Lagrangian submanifolds in a 6-dimensional manifold equipped with a generalization of a Calabi-Yau structure. These perturbed special Lagrangian submanifolds arise as solutions to an infinite-dimensional Lagrange multipliers problem which is part of a proposal for counting special Lagrangians outlined by Donaldson and Segal in their paper Gauge theory in higher dimensions II. More specifically, we prove that this moduli space is generically a set of isolated points.
In the course of the study, a comparative analysis was carried out on the various types of shrubs that may be potentially interesting for introduction in Astana, Kazakhstan. Their phenological and botanical features, such as height, shape of the bush, colour and size of flowers, seasonal flowering and decorative foliage, were studied. Special attention was paid to the adaptation of these species to local conditions, such as climate, soil and water availability. Observations of their growth and development over several years were carried out to determine their stability and suitability for acclimatization in an urban environment. The possibility of using these types of shrubs in the landscape design of Astana was also evaluated. The issues of combining them with other plants, creating compositions and also aesthetically attractive plant ensembles were considered. The results of the study allowed us to identify the most promising local types of shrubs suitable for introduction in Astana, as well as to highlight recommendations for their use in landscaping the city. The obtained data and conclusions will be useful for specialists involved in the planning and creation of public and private spaces, as well as for local governments. Thus, this study will be a comprehensive analysis and the introduction of promising local species of shrubs in Astana, taking into account their suitability for local conditions and the possibility of use in the landscape design of the city.
We study the interaction of a V-type atom in a cavity with incident single- and two-photon wavepackets and derive an exact formula, valid in all parameter regimes, relating the spectrum of the outgoing wavepackets to the incident one. We present detailed results for several special input pulses, and consider the potential performance of the system as a CPHASE gate for initial pulses in a product state. We find values of the cavity, atomic and pulse parameters that yield a conditional phase shift of $π$, albeit with a relatively small overlap between the incoming and outgoing pulse forms.
Traditional approaches to the design of multi-agent navigation algorithms consider the environment as a fixed constraint, despite the obvious influence of spatial constraints on agents' performance. Yet hand-designing improved environment layouts and structures is inefficient and potentially expensive. The goal of this paper is to consider the environment as a decision variable in a system-level optimization problem, where both agent performance and environment cost can be accounted for. We begin by proposing a novel environment optimization problem. We show, through formal proofs, under which conditions the environment can change while guaranteeing completeness (i.e., all agents reach their navigation goals). Our solution leverages a model-free reinforcement learning approach. In order to accommodate a broad range of implementation scenarios, we include both online and offline optimization, and both discrete and continuous environment representations. Numerical results corroborate our theoretical findings and validate our approach.
We show how the solution to NMPC problems for a special type of input-affine discrete-time systems can be obtained by reformulating the underlying non-convex optimal control problem in terms of a finite number of convex subproblems. The reformulation is facilitated by exact (input-state) linearization, which is shown to provide beneficial properties for the treated class of systems. We characterize possible types of the resulting convex subproblems and illustrate our approach with three numerical examples.
Special generic maps are generalizations of Morse functions with exactly two singular points on spheres and canonical projections of unit spheres. They restrict the manifolds of the domains strongly in considerable cases and are important in algebraic topology and differential topology of manifolds of specific classes and manifolds regarded as elementary in some senses admit such maps in considerable cases. We propose a class of generalized special generic maps in our present paper and extend a fundamental result on structures and some algebraic topological properties of special generic maps by the author. Our present study will be a pioneering study on nice classes of generalized special generic maps. Studies of algebraic topological properties and differential topological ones of special generic maps have developed due to their nice structures for example.
The book “Graphics for Learning” is the result of the valuable efforts of Ruth Colvin Clark and Chopeta Lyones in explaining graphics to facilitate learning. The main premise of the book is that the use of graphics (visual elements) alongside words facilitates learning compared to words alone. The authors’ efforts in presenting the material are accompanied by features such as the use of research evidence and action-based cognitive theory in real-life learning situations, clear and integrated expression, and up-to-datedness, to distinguish this book from other books in graphic design. Another special feature of the book is the use of graphic guides or instructions on how to use visual elements to enhance the processes of learning psychology and to learn different types of course content. The existence of a general map of the book and an explanation of the position of each section and each chapter in relation to the collection of contents have led to the integration and formation of a mental map. However, in selecting the general topics and concepts, the authors’ reasons have not been properly identified, and there are also criticisms about ignoring learning styles, learning environment, and not explaining teaching and learning. This book is one of the resources in the field of educational technology, and it is worthwhile to examine the dimensions of its effectiveness in teaching and learning.
Indo-Iranian languages and literature, General Works
Jarosław Maśliński, Patryk Wasilewski, Paweł Piepiora
et al.
Access to sports services is important for the physical development and functioning of blind and visually impaired people. Access to this type of activity also affects the rehabilitation of people with visual impairment and their daily functioning. Sport activity and participation in various forms of recreation is a very broad concept in physical culture. Understanding the form of physical activities that the visually impaired and blind people prefer can help educators, physical education teachers, and people associated with visually impaired and blind children in planning physical activities. It is important to understand the needs of such people regarding the sports environment and whether they are given active participation in it through infrastructure adapted to the needs of youth with sight disabilities. The aim of the study was to find out the opinions of blind and visually impaired students about the availability of sports and recreation services and equipment in their immediate surroundings. The subject of the study were boys and girls with low vision and blind attending the seventh and eighth grades of primary, secondary (technical and high school) schools at the Special Educational Center for Blind and Visually Impaired Children in Wrocław and among the graduates of that school. The subjects belonged to the age group in the range from 13 to 25 years. The study group included 32 boys and 21 girls. Based on the documentation, the blind group includes students with a significant degree of disability, vision defects. The visually impaired include persons with various moderate and mild eyesight injuries. The research used a survey method of my own authorship, which allowed to know the problem while maintaining anonymity. 26 questions related to min. interests of respondents, access to sports bases, sports sections for the blind and visually impaired. The obtained results showed that it is worth making young people aware of the importance of participation in broadly understood physical culture. Equal opportunities for boys and girls to engage in various types of sports should also be equalized. Not always sports that are preferred by young people are available to them.
Bactericidal effect of ultraviolet (UV) rays was first described over 100 years ago. UV was used in hospitals from 1930 and in 1936 was first used to sterilize the air in the operating room. The maximum bactericidal effect occurs in the region 254-257 nm UV wavelength, which is manifested mainly in the destructive-modifying photochemical damage of DNA synthesis. So, UV rays causes an increase in the permeability of the microbial cell membranes to ions environment and coagulation of colloids cytoplasm, resulting in disruption of normal cell development, stopping the reproduction and lysis. In any body there are biochemical mechanisms that could fully or partially restore the damaged original structure of the DNA molecule - fotoreactivation. It's resistant microorganisms consist about 0.01% of the microbial population, but the certain types reach 1-5%. Surviving bacteria can form new colonies with less susceptibility to radiation. Mycobacteria in the course of evolution developed various mechanisms to overcome or inactivation of adverse environmental factors: a special cell wall (waxes, fats, mycolic acid); large metabolic capabilities by which M. tuberculosis able to inactivate various antiseptics and disinfectants; morphological plasticity, which is spontaneous and induced transformation in L-forms with a reversion of virulent original shape. М. tuberculosis more resistant to UV radiation than other bacteria. Materials and methods. We investigated the effectiveness of UV radiation against to M. tuberculosis at distances from the radiator - 70 cm, 140 cm, 210 cm; exposure time 20, 30, 40 and 50 minutes. We used museum strain H37Rv and 3 clinical strains: 1 - strain with preserved sensitivity; 2 - strain with resistance to isoniazid and rifampicin; 3 - strain with resistance to isoniazid, rifampicin and ofloxacin (enhanced resistance). We used radiator - Philips TUV power 30 W (without ozone for up to 6000 hours). Control and irradiated cultures of the pathogen were grown in the media of Levenstain-Yensen, Blood media of Shkolnikova and medium VCG to detect L-forms. For the accuracy of the results, each experiment was performed in 6 series was set down three times (at intervals of 30 days). Results and discution. UV using for 20 minutes almost 1/5 of M. tuberculosis it caused survival (21,60 ± 1,83%); at 30-minute UV (standard exposure time) - 13% M. tuberculosis remain viable; 3,24 ± 1,28% remain viable even 40 minutes of ultraviolet irradiation. Оnly by increasing the time to 50 minutes to achieve sufficient efficacy in destroying vegetative forms, but even this term may not be enough to prevent the formation and survival of L-form (1,08 ± 0.91% in the medium VCG). The effective exposure time vegetative forms of мycobacterium 40 minutes at a distance of 70 cm, at least 50 minutes at a distance of 210 cm. The effective exposure time to prevent the survival of L-form is at least 50 minutes at a distance of 70 cm. Conclusion. The UV irradiation causes the L-transformation of the bacteria. This phenomenon detected on VKG media. The formation of L-forms and the possibility of reversion to consider when using UV. Among the experimental crops more resistant compared to the referent strain differed clinical isolates with the presence of resistance to anti-TB drugs.