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Background. Physico-chemical modification of leather production waste opens up the possibility of their use, which reduces the environmental load on the environment. Purpose. Establishing a relationship between the components and strength of composite paper from modified leather and waste paper. Methodology. Modification of fibrous waste in an alkaline solution, differential thermal analysis, testing of physical and mechanical properties. Originality. An increase in the degree of leather cross-linking during the modification process was established, and the thermal and physical-mechanical properties of the composition were determined. Findings. Alkaline treatment of chrome shavings promotes the appearance of new polar groups and an increase in the degree of cross-linking of the product. The thermal effects of the leather-waste paperacrylic emulsion composite characterize the process of adhesion of the sizing agent to the fibers. [ABSTRACT FROM AUTHOR]

The present paper is devoted to the moderator’s intellectual work on the international research project “Encyclopedia of flat curves”. A process of creating the so called paper-matrix is described. One unexpected circumstance is brought to light: mainly, the content of a paper-matrix is determined by the project general functions, in spite of its reflection on the moderator’s personal views. [ABSTRACT FROM AUTHOR]

The purpose of the article is aimed to study an important aspect of the preparation of a theatrical costume - its sketch creation in a set of tasks. In the historical evolvement, the sketch of the costume in the performances of Ukrainian theaters firstly accommodated the commonly used methods of performance. During the years of spreading the theatrical avant-garde, there was a significant step forward in terms of using new materials and textures to form special interpretations of the characters for visual solutions. A striking example of this is Anatoly Petritsky's sketches for two ballets: Corsair (1926) and Red Poppy (1927). Important methods for the study of the chosen topic involve consistent consideration of factual materials in chronological and artistic contexts. The first approach, which is based on the cultural-historical method, makes it possible to establish the main characteristics of the sketch of a theatrical costume within a particular historical period. The historical-comparative method allows comparing the features of approaches to creating sketches in chronological order. The application of the formal method reveals the special approaches of artists to the creation of visual meanings of the characters of the play. The novelty of the study is due to the systematic analysis of the most important parameters of the sketch as a type of work of art, a set of techniques used in the Ukrainian avant-garde theatrical and decorative arts. Conclusions. The analysis of the technological methods traced in the article allows us to state that in the projects of A. Petritsky's performances of the first half of the 1920s mostly established materials and graphic techniques were used. The artist intensified his experiments with textures in the middle of this decade, using drawing and applique to create an individual character, using not only different types of paper but also textiles. [ABSTRACT FROM AUTHOR]

Background. The task of developing methods for treating wastewater from pulp and paper production is to select effective reagents and optimize the conditions for their use, which is necessary to control chemical and colloidal-chemical processes occurring in a complex multicomponent multiphase system «waste water + coagulant + flocculant». Purpose. To study the way of purification of wastewater from pulp and paper production using ash from the Angrenskaya CHPP and flocculants based on furan compounds Methodology. To determine the size of the particles and the fraction of the fractional composition, we carried out a sedimentation analysis of wastewater after processing the ash of the Angren CHPP without a flocculant and in the presence of flocculants of the «FEAP» series. The kinetics of sedimentation and properties of sediments were studied on the Uken device until the complete sedimentation of suspended solids. Originality. For the first time, the process of coagulation with the ash of the Angren CHPP and the kinetics of wastewater clarification without and in the presence of flocculants have been studied. The optimal conditions for the wastewater treatment process have been found. Findings. It was revealed that the peagent method allows wastewater to be purified to the maximum permissible MPC. In addition, the use of new synthesized polymeric flocculants of the «FEAP» series accelerates the precipitation of dispersed phases 6-7 times increases the degree of clarification of purified waste water, which provides prerequisites for the development of a local water treatment system. [ABSTRACT FROM AUTHOR]

In this paper, the transport characteristics of two-dimensional systems has been investigated. Modeling by means of the Yukawa potential, in a wide range of values of the nonideality parameter, has been carried out. The Yukawa potential was chosen because of its wide applicability in the description of screened interactions in plasmas and other systems. A molecular dynamics method was used to determine the transport characteristics. The study was carried out with the aim of expanding the knowledge of heat transfer in two-dimensional systems. The paper presented the results of numerical experiments in which the dependences of the heat transfer and viscosity coefficients on the screening and non-ideality parameters in systems with Yukawa potential were studied. The obtained data can also serve as a basis for further theoretical and experimental studies in the field of transport characteristics of two-dimensional systems. These data not only expand the understanding of the peculiarities of two-dimensional systems, but also can be useful in the design and analysis of nanostructures and various microdevices. [ABSTRACT FROM AUTHOR]

This paper explains some developmental stages of a scientific and professional article, the formal requirements that it must satisfy in order to be published, its evaluation and the potential benefit that the author may have from publishing it. It deals with a scientific journal as a medium that has detailed instructions for writing texts, clear structure, established dynamics of publishing, classification of quality, impact factor according to which the ranking lists are being formed. The concept of scientific and professional article is also a subject of interest within this topic. The text is limited to articles intended for scientific and professional journals in the field of library and information science. When it comes to librarianship as a young scientific discipline, scientific journals, being media of communication within the community and observation of new trends in the profession, contribute significantly to the increase of its reputation by bringing better and more comprehensive articles. It is necessary to encourage creation of new scientific journals, and to encourage the existing ones to make additional efforts to define the fields of their interests more precisely, to establish the necessary rules and consistently take care of them being obeyed, so they could meet the requirements for obtaining at least the status of scientific journals. In this way, authors/ librarians would be given greater choice of quality media in order to address the scientific and professional community. On the other hand, in order to improve their scientific and professional reputation, scientific journals need a large number of high quality papers so that editors could choose the ones based on which they could aspire to a better status. [ABSTRACT FROM AUTHOR]

The paper shows the possibility of manufacturing metal flux-cored wires based on high-strength titanium alloys of different compositions (Ti–5Al–5Mo–5V–1Fe–1Cr and Ti–5Al–5Mo–5V–4Nb–1.5Cr–1Fe–2.5Zr systems), alloy based on medical grade titanium (Ti–13Zr–13Nb system) and structural titanium VT6 alloy (Ti–6Al–4V system), reinforced with TiC particles. The technological moments of the experimental production of metal flux-cored wires by the method of drawing and subsequent pulling are shown. The study was conducted on using these materials as a filler metal in WAAM technology both in the methods of argon arc as well as electron beam surfacing. [ABSTRACT FROM AUTHOR]

Introduction. A vestibular schwannoma (also known as acoustic neuroma) is a tumor developing from the schwann cells of the VIII cranial nerve. On average, 10% of intracranial tumors are accounted for vestibular schwannomas. Neuromas are slow-growing tumors, according to the Koos classification system there are 4 grades of tumors. Asymptomatic neuromas, measuring up to 1,5 сm, now because of the widespread use of MRI are diagnosed more often, which allows specialized monitoring and intervention if necessary. Treatment strategies for these tumors are still under dispute one of the new proposed options for possible treatment is neuroma excision while awake using the assessment of acoustically evoked potentials (AEPs), which provides dual control over the function of both the vestibulocochlear nerve, as well as facial and trigeminal nerves (Spontaneous Potentials, Trigger Potentials). In addition, if the group of caudal nerves is involved, their control is also possible, thereby increasing the chances of maintaining a satisfactory functioning of the anatomical structures bordering the tumor. Materials and methods. This paper reports on 4 microsurgical excisions of acoustic neuroma while the patient is awake, carried out at the multidisciplinary hospital named after professor Makazhanov. The selection of patients was carried out by an interdisciplinary team of physicians, consisting of a neurosurgeon, a neurologist, a neuropsychologist, and a speech therapist. Results. The results of the research are controversial, two of the treated patients noticed a slight improvement in hearing, and the third patient lacked any dynamics, while the forth patient was dissatisfied due to hearing impairment. Conclusion. The functioning of the facial and other nerves of operated patients was not affected. [ABSTRACT FROM AUTHOR]

The development of information technologies, which has led to an increase in the amount of multimedia content in World traffic, makes the role of the steganographic component in modern information protection systems significant. At the same time, to ensure steganographic protection of information in real-time when operating with digital video, the steganographic method is expected to meet the main effectivity criteria, as well as provide a low level of computational complexity, which is possible when performing steganographic transformation in the spatial domain of the container. One such modern method is the steganographic method with code control of additional information embedding. The problem of increasing the robustness of the specified steganographic method in the conditions of compression attacks by compression algorithms of digital video, primarily, the widespread MPEG-4 algorithm, is of particular interest. The purpose of this paper is to increase the robustness against attacks by compression of the steganographic method with code control of additional information embedding when operating with digital video. In this paper, experimental research on the robustness of the steganographic method with code control of additional information embedding in the conditions of a co mpression attack against the emb edded message by digital video compression algorithm MPEG-4 when embedding information using different colour models is performed. It is shown that embedding additional information in the Y-component of the YCbCr colour model allows reducing the number of errors when extracting additional information by 17%. It is also proposed to embed additional information using the steganographic method with code control only in dynamic blocks, which made it possible to reduce the number of errors when extracting additional information by 8%. The obtained results can be applied in practical steganographic applications to increase the robustness of the applied steganographic component of information protection systems. [ABSTRACT FROM AUTHOR]

The problem of solving the task of discrete optimization is not completely solved. Lack of publications, scientific developments, algorithms and software products do not give the ability to transfer the mathematical apparatus of solving discrete optimization problems to the class P of computational complexity. All analytical and combinatorial algorithms for solving problems of linear and non-linear optimization are NP completeness. There are developments to improve the efficiency of robotic algorithms, they are filled with requests and actual ones. In this paper, it is proposed to use deterministic and probabilistic methods for forming a priority queue of decision vector components in order to assign positive values to them. After the formation of the variant of the solution, it is possible to vectorize as if the approached solution is taken away from the record value of the goal function, which in exact algorithms is like a solution, which results in a polyp. In this paper has a method for forming a priority line for concretizing the components of the solution vector. The basis of deterministic methods is the idea of a greedy algorithm. The location in the queue is determined by the value of the corresponding component of the cost vector. The appearance of the value of non-visibility in the system of restrictions increases the priority of the component. Behind such a way, another method of determination is modified. Probability assessment probability of priorities is based on the ideas of algorithms in an ant colony and simulated annealing. The scope of probability indicates the significance of the component - a contender for a positive value. A numerical example of a small variability of the task about a knapsack has been introduced, which demonstrates the imitation of a nearby solution. [ABSTRACT FROM AUTHOR]