bluuebunny/crossref_metadata_2025 huggingface dataset:
APPLICATION OF COMPUTER VISION TECHNOLOGIES FOR AUTONOMOUS PILE MANIPULATION
Authors: Suponenkovs Artjoms , Kovalovs Mihails , Markovics Zigurds
Published: June 2019

Modern robots can perform uncreative monotonous tasks. One of such tasks is pile manipulation. Computer vision technologies can help robots acquire additional information by analyzing a pile of complex objects. One of such complex objects is a fish. The presented work investigates the problems of complex object analysis using computer vision. This paper addresses the challenges of image pre-processing, image segmentation, fish detection and occlusion detection. This work results can be useful for developing a computer vision system for pile manipulation.
INFORMATIONAL WARFARE – INFLUENCE ON INFORMATIONAL STRUCTURES
Authors: Grabusts Peter , Zorins Aleksejs , Teilāns Artis
Published: June 2019

The concept of information warfare encompasses the use of information and communication technologies to gain an advantage over a potential opponent. The information warfare is the manipulation with the information that trusts the goal, so that the goal should make decisions about its interests in the interests of opponents. Information structures are treated as systems that process different types of information, provide storage and access to users. Such structures may enclose neural networks, self-learning systems etc. They need to be ready to learn, respond to threats and ensure their safety, which is topical in today's information warfare. This paper will address aspects related to the security of information systems from a system theory point of view. The knowledge base of information structures can be elements of artificial intelligence, which security must be protected against various threats. The authors considers artificial neural networks to be one of the potential threats in the context of information warfare.
MATHEMATICAL DESCRIPTION AND MODELLING OF TRANSPORTATION OF CARGOES ON THE BASE DIGITAL RAILWAY
Authors: Zhuravleva Natalia Aleksandrovna , Gulyi Ilya Mikhailovich , Polyanichko Mark Aleksandrovich
Published: June 2019

This article presents the results of a mathematical description of the transportation process of goods by rail on the exit routes. The parameters reflecting state of time, speed and cost of the actual performance of the freight transportation are simulated, which makes it possible to identify and respond in time to the risk caused by interaction between adjacent subjects and objects for transportation. An algorithm to respond to a decrease in speed of transportation is determined. It is substantiated that the efficiency in transportation provides the level of development in transport and logistics system as an infrastructure of a new technological order. The price of these systems generates added value due to speed, inter modality services, drawing up optimal routes for cargo delivery, ensuring full car loads, passage control of goods at all stages of the logistics chain, etc., i.e. through the integration of products and services, considering the dominant global network of production and consumption. This work is an implementation element of digital formats in the operational activity of railways. The created model implements the “traceability” of information about the movement of cargo traffic in exit routes, generating Fast Date for time-sensitive decision-making process and Smart Date for asymmetric analytics. In contrast to the traditional model of transportation, the proposed solution is based on a mathematical description of all stages of the life cycle of freight (trains), which allows evaluating all costs by type of each process of transportation (movement and idle time) in real time mode. This approach takes into account the "investment" in the formation of value of all enterprises involved in transportation, including the condition and operation of technical infrastructure, locomotives, locomotive crews, wagon and freight facilities employees, and the movers themselves who provide and manage the transportation process. It is proved that the further growth of the profitability of the transport business is in direct correlation with the increase in the marginal profitability of shippers, and decrease of the transport component in the final price of goods achieved as result of digitizing the process of cargo transportation in the exit routes. The research methodology is based on the process-functional approach to describing the life cycle of a freight train, analysis factor for technical and economic characteristics of the transportation process and dynamic modelling of the parameters of significant means of elements affecting the transportation process. The information basis of the study relies on a representative sample of loading and unloading of goods in areas of mass traffic. We have investigated dependent (homomorphic) and independent (singular) pairs in accordance with the time, cost, and technical parameters.
EVALUATION OF DIGITAL MARKETING USE IN THE PROMOTION OF LATGALE REGION TOURISM
Authors: Karvele Ligita , Znotiņa Daina
Published: June 2019

Destination communication is essential for improving the economic and social development of cities, regions and countries, as tourism has become a major component of gross domestic product in most countries of the world. The development of information technology has fundamentally changed the use of traditional communication tools. Due to the development of modern information technologies, the Internet has become an integral part of tourism communication. Aim of the research is to explore the use of digital marketing in tourism promotion in Latgale region. Research methods - document analysis, statistical data analysis, survey - surveyed tourism information providers in Latgale region; statistical grouping, reading method, interview. The results of the research show that only 20% of Latgale region tourism information providers are actively involved in the use of social media. In the work of tourism information providers more attention is paid to printed materials than to video materials in the digital environment. But the most effective means of digital marketing is that all tourism information providers emphasize the importance of social networks. Digital Marketing Costs has only 40% of the Latgale region tourism information providers and they make between 100 and 3000 euros per year. On Visitlatgale.com and latgale.travel, most of the analyzed digital marketing criteria are not present. Latgale marketing action plan is quite varied and wide where costs are for many exhibitions both in Latvia and abroad, visits of Latvian tour operators and journalists, visits of foreign tour operators and bloggers, training seminars, but the marketing plan for 2019 does not include expenses for digital marketing. Latgale Region Tourism Association Ezerzeme marketing plan necessary to provide expenditure for the development of a communication plan - actively should be used funded projects possibilities, for example costs can be partly covered by the European Union's European Agricultural Fund for Rural Development (EAFRD) and the Rural Development Program. Latgale Region Tourism Association needs to attract project funding for tourism information providers training in digital marketing. More attention should be paid to publishing video materials and attracting appropriate specialists. Latgale Planning Region and Rezekne Municipality should improve tourism websites Latgale.travel and visitlatgale.com.
THE METHOD OF AUTOMATED BUILDING OF DOMAIN ONTOLOGY
Authors: Antonov Igor , Bruttan Iuliia , Motaylenko Lilia , Andreev Dmitry
Published: June 2019

This article is devoted to the tasks of automating the construction of domain ontologies. In the beginning, the limitations and problems of constructing the ontology of the domain using the well-known methods are discussed. Next, a model of the domain ontology is proposed, which provides the ability to automatically build the ontological hierarchy, including the automatic synthesis of generalized concepts. Then, the article discusses the method of building an ontology based on the proposed model using machine learning, and discusses its capabilities and limitations.
DEVELOPMENT AND ANALYSIS OF AUTHENTICATION METHOD FOR IOT DEVICES SOFTWARE ON THE NETWORK USING BLOCKCHAIN TECHNOLOGIES
Authors: Shtennikov Dmitry Gennadevich , Kuzmin Kirill Sergeevich , Letov Nikolay Evgenevich
Published: June 2019

Currently, there is an unsolved problem of IoT device authentication in networks to ensure their security. Due to low performance, work with traditional methods of protection is complicated and therefore a different approach is required. The article proposes a method for authenticating IoT devices (devices and software) by verifying their data and then entering it into the data storage. The implementation of a data storage using blockchain technology and the comparison of its efficiency with a classical database are considered. The aim of research is evelopment of the IoT device authentication method, analysis of the effectiveness and applicability of the developed method and comparison of various technological approaches to solving the problem. Obtained results is evaluation parameters of the resulting system and methods for constructing systems based on this method.
ELECTRONIC INFORMATION AND EDUCATIONAL ENVIRONMENT OF THE UNIVERSITY AS A MEANS OF ORGANIZING INDEPENDENT WORK OF STUDENTS
Authors: Zhestkova Elena , Fomina Natalia
Published: June 2019

In the context of the modernization of Russian higher education, training should be built on a differentiated basis, have a problematic and developing character. The main purpose of higher education is to prepare a graduate who is not just knowledgeable but who knows how to apply his knowledge. In this regard, there is a need for continuous self-education and self-development, in the development of selection skills useful for students of professional development and improvement of information. At the same time the efforts of the teacher should be aimed at creating an environment focused on independence, interactivity, productivity of students' activities, an environment that provides an opportunity to form an individual educational experience of a student moving along their own educational path. To organize effective independent work of students it is advisable to create an integrated system for organizing this work based on the information and educational environment of the university. The article presents the experience of organizing independent work of students of the Arzamas branch of Nizhny NovgorodStateUniversity through the electronic information and educational environment of the university. The article describes the developed electronic courses in the disciplines of the psychological-pedagogical cycle, shows the importance of such areas of independent work of students when using the electronic educational environment of the university as the search for the necessary information; preparation for practical, laboratory, seminar classes; preparation for the survey, colloquium; test preparation; preparation for tests and other types of written test works; preparation for various competitions, contests and more.
IMPROVING COMPUTER ENGINEERING AND INFORMATION TECHNOLOGIES UNDERGRADUATE STUDENTS’ TRAINING THROUGH COMBINATION OF FORMAL, NON-FORMAL AND INFORMAL LEARNING
Authors: Malykhin Oleksandr Volodymyrovych , Aristova Nataliia Oleksandrivna
Published: June 2019

The paper analyses benefits of combining formal, non-formal and informal learning in Computer Engineering and Information Technologies undergraduate students’ training. The results of research conducted in the 2017/2018 academic year are shown. A total of 106 students earning BA in Computer Engineering and Information Technologies at National University of Life and Environmental Sciences of Ukraine volunteered to participate in the research. The aim of the research was to investigate the influence of combining formal, non-formal and informal learning on improving Computer Engineering and Information Technologies undergraduate students’ training through the increase in their general self-efficacy. To collect data from 106 computer engineering and information technologies undergraduate students we applied a mixed methods approach implying the combination of qualitative and quantitative methods. The quantitative data were collected using a pre-test and a post-test based on a questionnaire on general self-efficacy. Qualitative methods included classroom observations and interviews with computer engineering and information technologies undergraduate students. The authors compared the results obtained in the experimental and control groups and drew conclusions concerning the positive effects of combining formal, non-formal and informal learning on improving Computer Engineering and Information Technologies undergraduate students’ training through the increase in their general self-efficacy.
BRAIN CONNECTIONS ANALYSIS USING GRAPH THEORY MEASURES
Authors: Minejeva Oļesja , Markovics Zigurds , Zdanovskis Nauris
Published: June 2019

Brain is a part of the organism’s complex structure that performs many functions, which are responsible for the main human abilities: to talk, to hear, to move, to see, etc. The brain consists of several areas that are not only directly connected with the different body systems, but also depend and may affect each other. Researchers and doctors are trying to summarize and visualize these relationships for an important purpose – to get the information about possible reactions of the body in case of various diseases, possibilities of recovery, risks, etc. important issues. Neurologists are looking for ways to "move" through the brain in virtual space for viewing the synapses between different areas. It might be useful to get a general idea of how brain regions are interrelated. The term "connectome", which is the complete structural description of the brain connections, or the map of connections, is used for the common perception of brain relationships. Connectome is a network of thousands of nerve fibres that transmits signals between the special regions responsible for functions such as vision, hearing, movement and memory, and combines these functions in a system that perceives, decides and acts as a whole. So, the relationships of brain neural regions can be represented as a graph with vertices corresponding to specific areas, but edges are links between these areas. This graph can be analysed using quantitative measures, like node degree, centrality, modularity etc. This article discusses the different network measures for the connections between brain's regions. The purpose is to determine the most important areas and the role of individual connections in the general functional brain model.
ANALYSIS OF ARTIFICIAL INTELLIGENCE APPLICATIONS FOR AUTOMATED TESTING OF VIDEO GAMES
Authors: Zarembo Imants
Published: June 2019

Game testing is a software testing process for quality control in video games. Game environments, sometimes called levels or maps, are complex and interactive systems. These environments can include level geometry, interactive entities, player and non-player controllable characters etc. Depending on the number and complexity of levels, testing them by hand may take a considerable effort. This is especially true for video games with procedurally generated levels that are automatically created using a specifically designed algorithm. A single change in a procedural generation algorithm can alter all of the video game levels, and they will have to be retested to ensure they are still completable or meet any other requirements of the game. This task may be suitable for automation, in particular using Artificial Intelligence (AI). The goal of this paper is to explore the most promising and up-to-date research on AI applications for video game testing to serve as a reference for anyone starting in the field.
DATA SCIENCE APPROACH FOR IT PROJECT MANAGEMENT
Authors: Grabis Janis , Haidabrus Bohdan , Protsenko Serhiy , Protsenko Iryna , Rovna Anna
Published: June 2019

Majority of the IT companies realized that ability to analyse and use data, could be one of the key factors for increasing of number of successful projects, portfolios, programs. Key performance indicators based on data analysis helps organizations be more prosperous in a long term perspective. Also, statistical data are very useful for monitoring and evaluation of project results which are very important for managers, delivery directors, CTO and others high level management of company. The Data Science methods could make more efficient project management in several of business problems. Analysis of historical data from the project life-cycle based on Data Science models could provide more efficient benefits for different stakeholders. Differential of the project data vector with target as an integral evaluation of the project success which allow for the complex correlations between separate features. Therefore, the influence of features importance and override creatures could be decreased on the target. This study propose new approach based on Data Science providing more efficient and accurately project management, taking into account best practices and project performance data.
DEVELOPMENT OF A PARAMETRIC PROGRAM FOR PROCESSING A HYPERBOLIC SURFACE ON A LATHE MACHINE
Authors: Kaldashev Tsvetan
Published: June 2019

This paper discusses the development of a parametric (macro) program for processing a hyperbolic surface on a CNC lathe machine. Analytical dependences have been used to develop the macro program, as a result of which the CNC (computer numerical control) automatically calculates the coordinates of the intermediate points of the tool trajectory. The WHILE cycle operator is used to run the tool. Macro program functionality has been verified in a virtual environment using Vericut.
ANALYSIS OF LASER PROCESSING OF ARTIFICIAL LEATHER
Authors: Narica Pāvels , Laizāne Ruta , Pacejs Antons , Mežinska Silvija
Published: June 2019

With the development of laser technologies, the field of application of lasers is developing as well. They are capable of processing numerous materials and are still finding their application in unexpected areas. In this case, lasers are studied as a system with which black and white color artificial leather can be processed. This modern material allows you to combine comfort, practicality and reasonable price in a finished product. The manufacturer of artificial leather provides wide possibilities of design. In this study laser beam was used for dark and light laser markings on black and white color artificial leather and in this work, it could be observed how CO2 and fiber laser processing influence this specific material.
FERROELECTRIC NANOCOMPOSITES WITH GOVERNED INTERFACE ON BASE OF MAGNETIC POROUS GLASSES
Authors: Naberezhnov Aleksandr , Sysoeva Anna , Alekseeva Olga , Vanina Polina , Golosovsky I. , Nacke Bernard , Nikanorov Alexander
Published: June 2019

Two-phase (nonporous) magnetic alkali borosilicate glasses have been produced by induction melting. Their macroscopic properties and crystal structure have been studied and it is shown that in the silica skeleton there are the agglomerates of Fe3O4. These agglomerates are formed by monodomain nanoparticles of magnetite and demonstrate the superparamagnetic properties. After special thermal treatment (liquation process) and chemical etching the nanoporous matrices with random dendrite pore structure and magnetic properties have been produced. The channels (porous space) were filled by ferroelectric materials KH2PO4 (KDP), KH2PO4+(NH4)H2PO4 (KDP-ADP or KADP), and NaNO2 and the effect of applied magnetic fields on phase transitions in these nanocomposite have been studied. It has also been established that a restricted geometry changed essentially the phase diagram of KADP.
CONSTRUCTION OF PISTON OUTER PROFILE FOR ROTARY TYPE EXPANSION MACHINE
Authors: Zhuravlev Yury , Perminov Andrey , Lukyanov Yury , Tikhonov Sergey , Ilyin Alexander
Published: June 2019

The article discusses methods for constructing piston outer profile for the rotary type expansion machine in order to reduce unwanted (parasitic) volumes and offers options for constructing outer profile of piston using analytical and geometric methods.
SYNERGETIC MODEL OF ELECTRO-FRICTION INTERACTION
Authors: Plokhov Igor , Ilyin Alexander , Kozyreva Oksana , Savraev Igor , Kotkov Nikita
Published: June 2019

The paper describes algorithms and structure of the electro-friction interaction synergetic model. The results of theoretical modelling and experimental study of sliding electrical contact are given. The comparison of theoretical and experimental results made in the paper proves high validity of the model and its programmatic implementation.
SPECIAL HPERBOLIC TYPE APPROXIMATION FOR SOLVING OF 3-D TWO LAYER STATIONARY DIFFUSION PROBLEM
Authors: Kangro Ilmārs , Kalis Harijs , Teirumnieka Ērika , Teirumnieks Edmunds
Published: June 2019

In this paper we examine the conservative averaging method (CAM) along the vertical z-coordinate for solving the 3-D boundary-value 2 layers diffusion problem. The special parabolic and hyperbolic type approximation (splines), that interpolate the middle integral values of piece-wise smooth function, is investigated. With the help of these splines the problems of mathematical physics in 3-D with respect to one coordinate are reduced to problems for system of equations in 2-D in every layer. This procedure allows reduce also the 2-D problem to a 1-D problem and the solution of the approximated problem can be obtained analytically. As the practical application of the created mathematical model, we are studying the calculation of the concentration of heavy metal calcium (Ca) in a two-layer peat block.
COMPARATIVE STUDY OF INDUSTRIAL LIGNOSULFONATES AND SOME THEIR PROPERTIES
Authors: Neiberte Brigita , Jablonsky Antons , Shulga Galia , Verovkins Anrijs , Vitolina Sanita , Brovkina Julia
Published: June 2019

The aim was to compare the chemical composition and some properties of three industrial lignosulfonates produced as a by-product at three pulp and paper mills (Russia). Using the classical methods of lignin chemistry, it was found that there were differences in the elemental composition and the content of functional groups of the industrial lignosulfonates, but in general, they were not very significant. The Kondopoga lignosulfonates contained the highest content of methoxy, aliphatic hydroxyl groups and carbonyl groups. The Vyborg lignosulfonates had the highest degree of sulfonation and the lowest content of carbonyl groups. The content of the functional groups in the chemical composition of the Syassky lignosulfonates was intermediate between the functional composition of the Vyborg and Kondopoga lignosulfonates. The Vyborg lignosulfonates had the lowest values of the viscosity average molecular mass, dynamic viscosity and surface tension at the air-water interface in comparison with these parameters of the Kondopoga and Syassky lignosulfonates.
METHODOLOGY FOR AUTOMATIC DETERMINATION OF CONTRAST OF LASER MARKING FOR DIFFERENT MATERIALS
Authors: Lazov Lyubomir , Teirumnieks Edmunds , Angelov Nikolay , Teirumnieka Erika
Published: June 2019

A new methodology for determining and optimizing the contrast of the technological laser marking process has been developed. It can evaluate the quality of the markings regardless of the type of material and the type of laser system. To perform the test analysis, a specialized test field is programmed, which including the change of two of the main parameters influencing the marking process: the linear energy density (LED) and the linear density of the pulses (LDI). Marking of a test field consisting of squares of a certain size is done by means of a raster marking method with a constant step between the lines. The results are processed with a digital camera and specialized software. The maximum blackening is compared with the background of all fields and is juxtaposed with the effective energy needed to obtain a certain contrast. Several consecutive iterations are made, with each of the following experiments excluding the variants with least contrast. Thus, the study consistently brings the result to a minimum working area of the basic technological parameters, providing the user's desired contrast of the marking. The developed author's method of automatically determining the contrast of the laser marking reduces the time for preliminary experimental research and gives a reliable and subjectively absent way of qualitatively marking different types of industrial products.
COMBINED TECHNOLOGY OF ELECTRO-SPARK ALLOYING AND THERMAL DIFFUSION BORIDING OF STEEL
Authors: Dashkevich Vladimir , Usherenko Yulia , Ivashko Victor , Matvienko Igor
Published: June 2019

The process of thermal diffusion boriding is well known and used throughout the world. It has a number of unique properties, such as high hardness and wear resistance under abrasive wear conditions. Continuous boride layers have increased brittleness, which is related with the elastic properties of borides. In this work, we studied the features of the formation of surface layers onlow-carbon steels after electro-spark alloying, and not by continuous processing of the entire surface of the steel, but only sections and subsequent thermal diffusion boriding from powder medium. Such complex technology enables to form discrete regular and irregular layers, which have a number of advantages, in particular, reduced brittleness. The structure and phase composition of the combined coating growth kinetics of the diffusion layer during the thermal diffusion boriding, are investigated. The creation of the considered composite layers with FeB and Fe2B phases with reduced brittleness will significantly expand their area of application, for example, for working conditions with moderate impact loads.
UNIDIRECTIONAL BRAKING ENERGY RECOVERY SYSTEM FOR ELEVATORS
Authors: Kroics Kaspars
Published: June 2019

The paper discusses design of energy storage based energy recovery system for elevators. The main element of such system is unidirectional DC-DC converter to control energy flow to supercapacitor or li-ion battery based energy storage. The paper gives explanation of selection of the converter topology and some design considerations. The test results of experimental prototype on a developed test bench are presented in the paper.
PRECISION MICROMACHINING OF METALS BY CUBR LASER
Authors: Balchev Ivaylo , Lazov Lyubomir , Teirumnieks Edmunds
Published: June 2019

The ability to laser machine materials with high resolution and high throughput is critical in advanced manufacturing for a vast array of applications, from photovoltaic cells to bio-compatible micro-components. Copper bromide (CuBr) lasers with their excellent beam quality promised noticeable advantages and improvements in high precision and material processing at the microscale. The application of the CuBr laser as a precision tool for micromachining of different metals has been demonstrated. That good performance was a result of the combination of high power visible radiation, short pulses, and close to the diffraction-limited laser beam divergence with high-speed galvo scanner beam steering.
INVESTIGATION ON TRIBOLOGICAL BEHAVIOR OF DUCTILE CAST IRONS WITH NANOSIZED PARTICLES
Authors: Kaleicheva Julieta , Mishev Valentin , Tongov Manahil
Published: June 2019

The work in this study is focused on investigation of the tribological behavior of ductile cast iron with nanosized particles: titanium nitride TiN; titanium nitride 30% + titanium carbonitride 70% (30%TiN+70%TiCN). The ductile cast iron composition is: Fe-3,55C-2,67Si-0,31Mn-0,009S-0,027P-0,040Cu-0,025Cr-0,08Ni-0,06Mg wt%. Before the addition to the melt nanosized particles were coated with nickel by the electroless nickel deposition method EFFTOMNICKEL .The nickel coating on the nanosized particles ensures their wetting in the melt as well as their uniform distribution into the cast. The optical and quantity metallographic observations and wear test are performed to study the influence of the nanoparticle additives on the cast iron tribological properties. It is observed that the quantity proportion changes between pearlite, ferrite and graphite phase in the cast iron structure. The graphite shape is retained the same, but the nanosized additives decrease the average diameter of the graphite spheres Dmid and increase the quantity of the graphite phase in the structure of ductile cast irons. The cast iron wear resistance in the presence of nanosized additives of (TiN+TiCN) and TiN increases to 55–69% in comparison to wear resistance of the cast iron without nanoparticles.
INFLUENCE OF THE ANODE AND WEHNELT VOLTAGE ON THE CROSSOVER POSITION IN THE ELECTRON BEAM WELDING
Authors: Tongov Manahil
Published: June 2019

Through the numerical modelling methods, the influence of the wehnelt voltage anode voltage on the crossover position of the electron beam welding (EBW) was monitored and analysed. The finite element method (FEM) is used to obtain the simulation results. The formation of the electron beam in the electrostatic part of an electron optic system (EOS) is described by solving the electrostatic task. To obtain the current emitted from cathode, electrical and thermal tasks are solved in the cathode node and Richardson-Dushman equation is used with Schottky correction. By using the results of the electrostatic field, the active emission spot is determined. By simulating the movement of the emitted electrons under the action of the electrostatic field, the shape of the beam is determined and the distance between the cathode and the electrostatic focus is found. The results of the influence of the wehnelt and anode voltage on the magnitude of the emission current and the position of the crossover, as well as the beam dimensions in crossover and anode outlet section at constant cathode heating current are presented.
INVESTIGATION OF THE CORROSION BEHAVIOUR OF ALUMINIUM ALLOY IN SELECTED ENVIRONMENTS
Authors: Kamarska Kalina
Published: June 2019

The corrosion behaviour of aluminium alloy EN AW-2011 was investigated in selected environments of various electrolytes using gravimetric technique. The results showed that, under the conditions employed in the present work, the corrosion rate of this alloy depends on the specific ions present in solution. The corrosion resistance of aluminium alloy EN AW-2011 is higher in solutions of acids and salts containing sulfate and nitrate ions than in these consisting chloride ions.
EXPERIMENTAL STUDYING OF MECHANICAL-AND- PHYSICAL PROPERTIES OF RUBBER DURING AGEING
Authors: Polukoshko Svetlana , Martinovs Andris , Zaicevs Edgars
Published: June 2019

Elastomeric materials, both natural rubber and synthetic, are widely used in industry and civil engineering, due to their unique properties: high elasticity, low volume compressibility, capability to absorb and dissipate input energy, a linear relationship between stress and strain up to strain of 15% ÷ 20%, resistance to aggressive environmental factors. Different kind of compensation devices, vibration dampers, shock absorbers are fabricated from rubber materials.At the same time the elastomeric materials nonreversible change their properties over time, this disadvantage is called ageing.In given paper the results of experimental studying of the influence of aging on the physical-and-mechanical properties of polyurethane rubber is presented. The samples of cylindrical form were prepared from soft flexible polyurethane rubber Xenias PX30 and subjected to the artificial ageing. Accelerated aging of samples was fulfilled in accordance with European standard ISO 188:2011 (Rubber, vulcanized or thermoplastic - Accelerated ageing and heat resistance tests).The changing of volume, Shore A hardness, elastic rebound coefficient and static elasticity modulus under compression were investigated. Experiments showed the volume decrease, hardness shore increasing, elastic rebound increase and compression modulus under static loading increasing. This data are necessary for correct designing of the compensation devices to provide their working properties during all service life.
My way to surgery began in childhood... Autobiographic essay
Authors: Romanchishen Anatoliy F.
Published: June 2019

The autobiographical essay presents the history of the formation of the head of the department of hospital surgery with courses of traumatology and military surgery Anatoly Philippovich Romanchishen as a person, a surgeon, a high-class specialist in endocrine surgery. The author recalled his school years and his teachers who guided his life path, how it was decided to enter the Leningrad Pediatric Medical Institute. He was lucky to study the specialty under the guidance of such great teachers as A.A. Rusanov, F.H. Kutushev, L.N. Kamardin. The author was linked with the pediatric institute (academy, university) for 50 years and is grateful to it for his wide education, broad professional horizons, which covers the diagnostic of diseases, treatment of both children and adults. Since 1991 and today, Anatoly Philippovich heads the department of hospital surgery. Over the years of his leadership, a lot has been done, including establishing international relations with leading endocrine surgeons of many countries to exchange experience. Russian Endocrine Symposiums with international participation were held in 2003 and 2014 in St. Petersburg under the guidance of Anatoly Philippovich with the help of staff of the department. As a doctor, teacher, researcher, he performs an enormous amount of work, has hundreds of publications in domestic and foreign journals. He is an author of manuals, textbooks, and monographs on surgery of the endocrine system organs. Professor Anatoly Philippovich Romanchishen constantly works at the forefront of science and practice, charging everyone with his energy. He is a worthy surgeon of the Russian surgical school who teaches students and young professionals.
Cardiac arrhythmias and predictors in patients of young age with marfanoid habitus
Authors: Timofeev Eugene V. , Zemtsovsky Eduard V. , Reeva Svetlana V.
Published: June 2019

Cardiac arrhythmias are frequent manifestations of hereditary connective tissue disorders (HCTD). Such HCTD as Marfan syndrome (MS), the primary mitral valve prolapse are characterized by frequent supraventricular and ventricular extrasystoles, prolonged PQ and QT interval, reduced heart rate variability and frequent findings of other predictors of heart arrhythmias. Cardiac arrhythmias as well as their predictors in patients of young age with marfanoid habitus (MH) were not previously evaluated.

Materials and methods. A total number of 238 patients of young age were examined. All patients received phenotypic and anthropometric screening and Holter ECG. Cardiac arrhythmias, duration of QT interval (QTc), QT dispersion (QTd), heart rate variability and heart rate turbulence were estimated.

Results for young people with MH as compared with the control group are characterized by frequent detection of paired (42.6% vs 9.7%, p= 0.00001), group (17.0% vs 4.2%, p = 0.01) supraventricular extrasystoles, ventricular extrasystoles in pathological quantity (10.6% vs 1.4%, p = 0.02). Pathological value of heart rate turbulence is detected significantly more frequently in individuals with MH. During evaluation of variability a significant decrease in all spectral (HF, LF, VLF), as well as most statistical (SDNN, pNN50) indicators was revealed. Patients with MH are characterized by prolonged QT interval (QTc threshold in 480 ms overcomes 21% of boys with MH, p = 0.00001) and increase the variance of the QT interval (threshold of 50 ms overcomes 37.5% of girls with MH, p = 0.0004).
Forensic medical examination of alcohol-attributable mortality in Saint Petersburg
Authors: Davydova Zlata V. , Yagmurov Oraz D.
Published: June 2019

This article presents an analytical material on the relationship of alcohol consumption and mortality in St. Petersburg for the period 2015-2017 years, which is based on the data of the city Bureau of forensic medical examination. The analysis of deaths found that the problem of abuse of alcoholic beverages (including ethanol containing) remains relevant, as indicated by the high (up to 30%) frequency of detection of acute ethanol poisoning in forensic examination of corpses. We found that ethanol poisoning in the structure of poisoning occupy the second place, while drug poisoning (opiates, cannabioids, cocaine) confidently and by a large margin occupy the first place. However, more than 75% of those who died from acute drug poisoning had alcohol in their blood. In cases where the death was violent, alcohol was found in the blood of more than 60% of the victims. High rates of alcohol intoxication were found in cases of death from low temperatures and mechanical asphyxia (hanging). About 25% of the victims of road accidents (pedestrians, drivers, passengers) were intoxicated. Our study showed no dynamics of reducing the frequency of alcohol intoxication and in cases where death occurs from diseases. When comparing certain types of non-violent death, it was found that most often the state of alcoholic intoxication accompanied (was the background) in cases of death from diseases of the digestive system: hemorrhagic pancreatitis, cirrhosis, gastric ulcer and duodenal ulcer, varicose veins of the esophagus (in 24-53% of cases), somewhat less – in diseases of the cardiovascular system (in 25-29% of cases).
Prevention of toxicity in chemotherapy with high doses of methotrexate in children
Authors: Evsiutina Ekaterina P. , Dinikina Yuliya V. , Belogurova Margarita B. , Aleksandrovich Yuriy S.
Published: June 2019

Methotrexate (MTX) is a widely used anti-tumor drug, folic acid antagonists. The effectiveness of high doses (more than 1 g/m2) of MTX in a monotherapy or in a combination with other chemotherapeutic drugs has been proven in a treatment of a large spectrum of oncological diseases in children such as osteosarcoma, tumors of the central nervous system, lymphomas, acute lymphoblastic leukemia. The use of high doses of MTX is often fraughted with development of life-threatening complications such as MTX-induced acute kidney injury, neurotoxicity, myelosuppression. Currently developed recommendations for therapeutic monitoring and supportive care, including hyper-hydration, urine alkalization and leucovorin therapy, allow to reduce toxicity of MTX, but in some patients it is not always possible to prevent the development of complications. Cohort studies in order to identify risk factors for toxicity after high doses of MTX in children with different forms of cancer are limited, as well as comparing various types of supportive care regimens, including, infusion therapy. Studying of development mechanisms of MTX toxicity depending on background conditions will allow to improve existing recommendations and develop new and most effective standards of supportive therapy with respect to the individual specifics of patients.
Bariatric surgery metabolic effects
Authors: Mirchuk Konstantin K. , Vasilevskiy Dmitriy I. , Anisimova Kristina A. , Davletbaeva Leysan I.
Published: June 2019

Obesity is considered now as a chronic relapsing lifelong disease, with a tendency to progression. According to the WHO, it present about 60% of the population of economically developed countries is overweight, 25-30% – is obesity. Russia is in fifth place in the world in the prevalence of obesity and overweight, being second only to the United States, Mexico, Hungary and Scotland. According to the Research Institute of Nutrition in the North-West region of the Russian Federation, 29.7% of women and 18.5% of men are overweight. Associated with obesity diseases include atherosclerosis, type 2 diabetes, hypertension, coronary heart disease, hormonal disorders, some cancers, etc. In proportion to the number of obese people increases and the incidence of pathological conditions associated with overweight. The vast majority of 95% of obese people die from causes directly related to overweight. The life expectancy of patients with overweight is reduced by 10-20 years, depending on the age of development and severity of obesity. The effectiveness of the conservative methods of correction associated with overweight in the arsenal of medicine today is low due to the complexity of the impact on their main cause – overweight. The article presents modern ideas about the mechanisms of action, hormonal and metabolic effects of the main types of bariatric operations. High long-term efficacy of surgical treatment of obesity-associated dis-orders of lipid and carbohydrate metabolism, arterial hypertension has been shown.
Editorial Comment
Authors: Pérez-Chico David
Published: June 2019

After June 19th, the title—“Cavell after Cavell”—for this collection of papers on Stanley Cavell’s rich philosophical work has taken on a new meaning. Originally, contributors were asked to explore new trends based on Cavell's thought, but what we have now is also reminiscent of an homage by some notable scholars who were his students or who knew him very well.
Editorial Comment
Authors: LaRocca David
Published: June 2019

A year has elapsed since Stanley Cavell died, and in that time those who knew him and read his work, have been coming to terms with his permanent departure. For many it has not been easy, and part of this difficulty includes trying to say something in writing about what the loss has meant, or might entail, or perhaps better, what it stirs in us.
Encountering Cavell
Authors: Eldridge Richard
Published: June 2019

I first came across Stanley Cavell’s writing in the fall of 1974 in a senior seminar in the philosophy of mind at Middlebury College, co-taught by Stanley Bates and Timothy Gould. We spent most of the term reading Gilbert Ryle’s The Concept of Mind and P. F. Strawson’s Individuals—books that at that time, before the widespread reception of Kripke’s Naming and Necessity, Putnam-style functionalism, and central state identity theory, still counted as contemporary philosophy of mind. It was then felt by Bates and Gould, I conjecture, that something more lively and something having to do with subjectivity might be order. Both of them had been Ph.D. students with Cavell at Harvard, and so we turned to “Knowing and Acknowledging.”
Continuing Education with Stanley Cavell
Authors: Saito Naoko
Published: June 2019

How many times in my life have I re-encountered my teacher, Stanley Cavell? The most memorable, the first encounter with him was in the winter of 1996 at Harvard—the image still vivid in my memory, the snow falling outside the window of his room, with me sitting in front of Stanley. At the suggestions of a teaching assistant of Hilary Putnam, who had read my term paper, I made an appointment with Stanley and introduced myself along with my abiding question regarding American philosophy. When I presented this as my being “torn” between Emerson and Dewey, Stanley reacted immediately and expressed his sense of sympathy with me. That was the beginning of a kind of continuing education for me and of the lifelong task I consider myself to have shared with him.
Cavell as Mentor
Authors: Ngai Siane
Published: June 2019

I was a Grad student in English at Harvard in the mid-90s, but physically there for just three years, anxious to move to Brooklyn for a relationship as soon as I became ABD. In that brief but intense period of time, I tried to take as many courses offered by Stanley Cavell as possible. In my last year, I asked him to be a member of my dissertation committee. Looking back I’m still flooded with gratitude (and astonishment) by the fact that he said yes.
Implodindo Luzia: Traçando a Construção de Raça, Etnicidade e Nacionalidade na Arqueologia Brasileira
Authors: Wittmann Marcus A. S.
Published: June 2019

Este artigo se propõe a analisar a construção do conhecimento arqueológico referente à Luzia, o hominídeo mais antigo encontrado no Brasil. Traçando os diferentes locais, tempos, métodos e teorias pelas quais o crânio do Hominídeo I, da Lapa Vermelha IV, passou, pretende-se mostrar como sua identidade, de primeira brasileira, foi formada pela Arqueologia brasileira e pela mídia. Seguindo controvérsias e debates acerca de Luzia, desde sua descoberta na década de 1970 até a solidificação de sua identidade brasileira na década de 1990 e na manutenção e uso dessa verdade nota-se, atualmente, como Luzia foi constituída como um fato científico de grande relevância para a Arqueologia brasileira e mundial. A implosão - conceito proposto por Haraway - do processo de construção do conhecimento e de extroversão deste sobre Luzia nos mostra como os conceitos de raça, etnicidade e nacionalidade são constituídos na e pela arqueologia brasileira.
De Líderes y Seguidores. Estrategias Políticas Indígenas en la Frontera
Authors: Literas Luciano , Barbuto Lorena
Published: June 2019

O seguinte trabalho considera a liderança nas estruturas sociopolíticas dos “índios amigos”, durante a segunda metade do século XIX, nas regiões de Pampa e Patagônia (atual República Argentina). Ele se concentra no alcance e nos limites das lideranças, os capitais e recursos que interviram no poder político, na incidência da intervenção estatal nos margens de ação e nas estratégias de ação política assim como nos vínculos com a comunidade representada. Para tanto, analisam-se as experiências e trajetórias de três líderes ao longo de quatro décadas, que constituem uma porta de entrada para diferentes momentos do espaço fronteiriço e das relações de poder: Cristóbal Carri-llang, Manuel Grande e Ramón Tripailaf. A esse respeito, observou-se que certas competências políticas, conexões sociais e pertencimentos parentais constituíam recursos significativos e que os laços e relacionamentos duradouros sustentaram expectativas e permitiram estratégias em contextos cada vez mais adversos.
CONJUNTO ARQUITETÔNICO DO CARMO DO RECIFE: ESTUDO DA DOCUMENTAÇÃO DO ARQUIVO CENTRAL DO IPHAN
Authors: Pacheco Ricardo De Aguiar
Published: June 2019

Neste estudo analisamos a documentação do processo de tombamento presente no Arquivo Central do IPHAN buscando historiar o processo de tombamento das Edificações que compõem o Conjunto Arquitetônico do Carmo, Recife, PE observando as informações históricas utilizadas para lhe atribuir valor simbólico. Nossa leitura dessa documentação percebe o uso de fontes históricas para reconstituir o processo histórico vivido pelo bem tombado. Ao mesmo tempo observa a incorporação de valores e significados construídos pela comunidade que utiliza o bem cultural. Evidenciamos, portanto, que a política pública de preservação não se faz descolada nem da produção historiográfica nem da memória social da comunidade.
CASA DO GRITO: O PODER DO MUSEU CASA E DA MEDIAÇÃO CULTURAL NO PROCESSO DE ELABORAÇÃO DA MEMÓRIA
Authors: Monteiro Luciano Araujo
Published: June 2019

Vivemos num momento em que os espaços sociais são facilmente descaracterizados e com uma velocidade célere, comprometendo a existência ou perpetuação de uma memória coletiva, sendo assim, torna-se imperativo a existência de lugares da memória e um deles é o próprio espaço museológico ou, mais precisamente, a Casa do Grito, por ser um Museu Casa exaltado como patrimônio por sua técnica construtiva (pau a pique) e por suas diversas significações, que serão apresentadas a seguir, intermediadas pelo trabalho de mediação cultural.
UM INVENTÁRIO DE MEMÓRIAS: PORTO ALEGRE E “DEU PRA TI, ANOS 70” (1981)
Authors: Alvim Alexandra Lis
Published: June 2019

"Fazer um filme sobre as nossas vidas": em 1981 essa era a ideia de um grupo de jovens aficionados por cinema quando juntou um punhado de ideias sobre a sua adolescência na década de 1970 e uma câmera de Super-8 para lançar em Porto Alegre o longa-metragem "Deu pra ti, anos setenta". O filme seria um sucesso local a partir de sua proposta de narrar as memórias sobre a década de um grupo de jovens de classe média naquela cidade. Com as ferramentas que dispunham, eles recriam suas vidas através do vídeo, recobrindo-as de sentido enquanto criam uma visão sobre Porto Alegre: uma cidade em Super-8, passível de ser significada com memórias e citações e de ser palco e objeto para os sonhos do cinema.