bluuebunny/crossref_metadata_2025 huggingface dataset:
The change of the properties of the turning process by introducing vibrations in the cutting zone
Authors: Zakovorotny Vilor , Gvindjiliya Valery
Published: November 2018

The results of the research of the vibrations influence are raising in the cutting zone on the output properties of the cutting process are represented. The results of the mathematical modeling of the dynamic cutting system are represented in which the controlling oscillatory displacements are raised. The system is considered as the unity subsystem of the tool and the detail are interacting through the processing. It is shows that the additional vibrations transform in the geometry topology of the forming surface as the result of the complex nonlinear interaction of the oscillations and the forces. The additional oscillations can cause as improvement of accuracy, quality and intensity of the tool wearing as deterioration of output process characteristics depending on the parameters of the vibration (amplitude, frequency and orientation). The results of the research of the oscillations influence on the quality of the surface and the power of the irreversible transformations which characterize the cutting process state are represented.
Adaptation of the control synthesized by the ACAR method to the control based on the implementation of the maximum principle
Authors: Lapshin Viktor P. , Turkin Ilya A. , Zakalyuzhnyy Alexey A. , Khlystunov Viktor F. , Kuzin Gennadiy A.
Published: November 2018

A special case of synthesizing the electromechanical control system by the maximum method and using the Analytical Construction method of Aggregate Regulators (ACAR) is considered in the article. For the basis the task of synthesizing the optimal for speed electromechanical positioning system was chosen, while the moment of resistance to movement linearly depended on the output coordinate of the system, that is, on the angle of the engine rotor rotation. Synthesis of the optimal system for speed makes it possible to increase the efficiency of the entire production process in many production tasks, and the synthesis of the optimal linear control system based on the maximum principle is a fairly well-formalized problem. Here it should be noted that the procedure for synergistic synthesis of the optimal control system has no such formalization. An approach that brings together the solutions obtained by these two methods, which makes it possible to increase the efficiency of the ACAR method by adding some features of the methodology for synthesizing optimal systems by introducing nonlinearity of the “saturation” type is proposed in the article. The results obtained made it possible to formulate the following basic scientific proposition: the synthesis of a control system based on the synergetic approach makes it possible to obtain a system close to optimal (quasi-optimal, but after the modification of the synergetic synthesis method itself.) Here we also formulate the hypothesis of a connection between the time constants, using the ACAR method, with the optimal control switching time determined in the maximum method.
Approaches to adaptive control of smoke removal rooflight based on mathematical modelling
Authors: Pilipenko Aleksandr V. , Zolotukhin Daniil A. , Pilipenko Anastasia Y.
Published: November 2018

In this paper, the authors analyze the design features of smoke removal zenith light, make calculations not only for the dynamic nature of dome’s opening/closing, but also taking into account all the forces affecting the object of investigation. Based on the suggested analysis, the authors develop a mathematical model that is proposed to be used for the purpose of developing a corrective effect in the algorithms of the system, which allows judging the adaptability.
Modelling a complex technical system of greenhouse production: the foundations of an interdisciplinary approach
Authors: Klyuchka Evgeniya P. , Radin Viktor V. , Groshev Leonid M. , Maksimov Valeriy P.
Published: November 2018

The fundamentals of an interdisciplinary approach to the design of greenhouse production systems are considered, in which biological objects (plants and humans) are present. The conceptual approach of the software solution is analyzed, synthesizing on the basis of the objectoriented concept such directions as disciplines on the construction of greenhouse production, dynamic simulation models, geoinformation systems. Based on the study of this issue, the conclusion was made about the advisability of applying an interdisciplinary approach for a comprehensive study of the projected complex biotechnical systems of greenhouse production.
Problems of modeling of complex technological systems of greenhouse production
Authors: Klyuchka Evgeniya P. , Radin Viktor V. , Groshev Leonid M. , Kambulov Sergey I.
Published: November 2018

The main problems connected with modelling of complex technological systems of greenhouse production are considered. The methodological approaches used at present on the basis of classical comparative analysis with subsequent heuristic conclusions are analysed. Based on the study of this issue, it was concluded that the development and implementation of innovative technologies that affect the individual subsystems of the greenhouse complex do not provide the optimal solution to improve the energy efficiency of the system as a whole. There is a need to create a new synergistic technological paradigm for abandoning costly full-scale models and developing models with a high level of adequacy of real technological processes.
Optimization of solar energy conversion power plant parameters
Authors: Obukhov Pavel S. , Kiselev Nikita V.
Published: November 2018

Autonomous power supplies based on solar batteries (SB) and wind generators are increasingly used. The structure of such systems, in addition to the SB itself, includes a re-chargeable battery (AB), a cable network, a load switch and a charge controller that performs, with an excess of the SB power, the functions of maintaining a given charg-ing current or charging voltage AB, and power deficit SB providing a mode of selection of maximal power from SB. In this paper, a mathematical model of such a system and its elements is presented.
Development of software monitoring module for multi-angle electric impedance tomography method research
Authors: Aleksanyan Grayr K. , Shcherbakov Ivan D. , Kucher Artem I. , Sulyz Andrey V.
Published: November 2018

This paper describes the experience of software development for multi-angle electrical impedance tomography. The relevance and necessity of an architecture for this kind of software product creating is considered, requirements for reliability and fault tolerance are defined. The choice of the architectural model has been made, design patterns have also been chosen taking into account the prospective scenario of using the developed software, their advantages are shown too. The most important attributes of software quality are described, which should implement the developed software product. The considered attributes of quality are projected on specific modules of the developed software. The architectural models and templates chosen during design are described, their advantages and disadvantages are considered. Support issues for the software developed by the cross-platform are discussed, and the possibility of working in various operating systems is demonstrated.
Development of a power supply for multi-angle electric impedance tomography complex
Authors: Aleksanyan Grayr K. , Shcherbakov Ivan D. , Kucher Artem I. , Volchenkov Evgeniy A.
Published: November 2018

In the present work, the development of a multi-channel power supply for the hardware part of the hardware-software complex of multiangle electric impedance tomography is considered. The requirements for the developed module are considered based on the selected hardware components, as well as the patient and medical personnel safety requirements, taking into account the standards developed by the International Electrotechnical Commission. Taking into account the formulated requirements, a structural, electrical schematic diagram of the power supply was developed, as well as a printed circuit board and an assembly drawing, and a prototype model was built. The issues of patient and medical personnel safety during the research using the multi-angle electric impedance tomography method with the use of the developed module are considered, including in the case of joint use with electrosurgical devices or defibrillators.
Investigation of the phase structure and surface morphology of the titanium nano-structured coatings for dental implants deposited by the method of magnetron sputtering
Authors: Gevorgyan Vladimir A. , Dolgalev Alexander A. , Tarala Vitaliy A. , Mangasaryan Naira R. , Buchalov Boris V.
Published: November 2018

In this work we develop a technology for deposition of titanium nano-structured coatings on titanium plain washers by magnetron sputtering and investigate the influence of technological conditions on the structural parameters of the deposited titanium coatings. Magnetron sputtering of pure 99.99% titanium coatings on titanium washers VT1.0 and VT6.0, has been developed. It is shown that by this method it is possible to form coatings of pure titanium with a nano-relief surface. Titanium coatings under varying deposition parameters were characterized by Scanning Electron Microscopy and Atom Force Microscopy. It is shown that titanium coatings deposited by magnetron sputtering technique have a nano-granular structure. The maximum surface irregularities vary within ± 150 nm, and the grain sizes vary from 50 nm to 450 nm. The obtained result is of great interest for further investigation of the influence of titanium coatings morphology and its nano-dimensional characteristics on the biochemical mechanisms responsible for the process of bone remodeling around the implant.

It is established that titanium coatings allow not only to form on the implants a nano-relief surface, but also drastically reduce on this surface the concentration of toxic elements that are initially present in the implant material VT6.0.
Phenomenological description of structural changes of the surface layers in a metalpolymer friction pair
Authors: Kolesnikov Igor V. , Ivanochkin Pavel G. , Ivanochkina Tatyana A.
Published: November 2018

The synergetic approach is suggested to use to describe physical and chemical processes convoying frictional interaction in a metal-polymer friction pair. The kinetic theory of the first-order phase transformations, based on the fluctuation depiction of the phase nucleation and the subsequent growth of its emissions, was applied to build a mathematical model of structural changes occurring in the surface layer. The model is brought to the system of Lorentz equations, where the temperature plays the role of the controlling parameter responsible for the process of the system structural rearrangement, the order parameter ε represents the shear strain component, and the conjugate field σ is the corresponding component of the elastic stress tensor. The representation of the thermodynamic potential in the form of expansion into a series of a variable h (the distribution density of the crystalline phase) is employed to make a qualitative analysis of the phase transition. The use of the expansion for the thermodynamic potential allows the nucleation of dispersed particles of the «new» phase in the old one.
Evaluation of fatigue life of polycrystalline structural alloys
Authors: Volkov Ivan A. , Igumnov Leonid A. , Ipatov Aleksandr A.
Published: November 2018

A mathematical model describing the processes of elastoplastic deformation and damage accumulation under low-cycle loading has been developed, based on the viewpoint of mechanics of damaged media (MDM). The MDM model consists of three interrelated parts: defining relations describing elastoplastic behavior of the materials, taking into account its dependence on the failure process; evolutionary equations describing the kinetics of damage accumulation; strength criteria of the damaged material. In order to assess the reliability and scope of applicability of the defining relations of mechanics of damaged media, the processes of plastic deformation and damage accumulation in variety of structural steels in low-cycle tests have been numerically analyzed, and numerical results obtained have been compared with the data of full-scale experiments. It is shown that the presented model of mechanics of damaged media adequately describes, both qualitatively and quantitatively, with accuracy, necessary for practical calculations, the main effects of the processes of plastic deformation and damage accumulation in structural alloys under block-type non-stationary non-symmetrical low-cycle loading.
Nonsteady frictional heating on a sliding contact
Authors: Zelentsov Vladimir B. , Mitrin Boris I.
Published: November 2018

We consider quasi-static contact problem on frictional heating on a sliding contact of a rotating rigid cylinder and a half-plane. The cylinder is pressed towards the half-plane material. The problem is reduced to solution of a singular integral equation with respect to contact stresses. Solution of the singular equation is looked for in a class of functions limited on the edge, with two additional conditions to determine timedependent boundaries of the contact area. Temperature at the contact and inside the half-plane is determined in terms of contact stresses.
Measuring of plasma’s velocity in electrodynamic railgun using high-frequency method
Authors: Kirievskiy Vladimir V. , Kirievskiy Evgeny V.
Published: November 2018

A method is proposed for measuring the velocity of a moving plasma in an electrodynamic railgun in the part of internal ballistics. The achieved result is to provide a measurement of instantaneous velocity and an increase of the safety level for operation of measuring devices.

The method is based on the excitation of the rail system of railgun high frequency electric oscillations during in due motion of plasma and creates current resonance. Then is continuously measured cyclic resonance frequency, and the instantaneous velocity of the plasma is determined by a formula, that consist of the current time, the cyclic resonance frequency, equivalent inductance of the power supply of railgun, linear inductance and rail length, and as well used as a model of measurement measure capacitance of capacitor, connected in parallel to rail of railgun grounded from one side. Application of plasma velocity measuring method is suitable for the highly-accurate control of plasma acceleration and pushed it to the railgun bodies with controlled acceleration, requiring measurement during movement of the plasma instantaneous values of velocity.
Probabilistic-deterministic approach of controlling the functionality of a technical system in normal and emergency operation modes
Authors: Zababurin Vladimir M. , Egorova Marina A. , Polyakova Yuliya A.
Published: November 2018

The main disadvantages of the existing methods of managing the current state of technical systems are revealed. A non-standard approach is proposed for managing the functionality of the system in emergency situations.

The character of the dynamics of the recovery processes of the technical system is determined as its state approaches the emergency one on the basis of the recommendations of the theory of self-organized criticality (SOC).

The physical criteria for assessing the current state of the technical system are revealed. The rationale for using the physical indicator of the functional destabilization of the system is given. The signs of the pre-emergency state of the technical system are considered.

A grapho-analytical model for the development of an emergency situation has been developed. The fact of the inevitable increase in the entropy of the system upon its transition to an emergency state is established. Structuring of the system development process in an emergency situation is carried out in three stages.

The methodology for estimating the pre-emergency state of complex open systems is presented. The advantages of the proposed approach to managing the state of technical systems in comparison with traditional ones are established.
Finite element modeling of bearing elements technological machines and equipment
Authors: Yevtushenko Sergey I. , Alekseev Sergey A. , Petrov Igor A. , Fedorchuk Vladimir E.
Published: November 2018

The paper considers the examples of technical production tests to determine the bearing capacity of the structural elements of technological machines and equipment used in various industries and agriculture: the bearing beam of the front axle of the combine harvester, fixed support plates of the apparatus for the production of plastic containers, bearing profiles of the thermal press designed to connect the ends of conveyor belts of various sizes, etc. The nature of stress distribution and deformations in the elements of the existing variants of technological machines and equipment allowed to identify shortcomings in their design. Analysis of calculations in ANSYS environment allowed to recommend variants of models of technological machines and equipment with better indicators of bearing capacity. This will greatly improve their reliability and performance.
Research of a hydrodynamic purifying device of exhaust and effluent gases from toxic components under dynamic conditions of their emissions into the atmosphere
Authors: Bespalov Vadim I. , Gurova Oksana S. , Alekseenko Lydmila N. , Prokhorova Anna P.
Published: November 2018

The article describes the air purifying device of the “OTPO-9” type, which implements the technology of hydrodynamic purification with a foam method where foam was produced by bubbling. The article considers it as the most environmentally efficient and energy-saving device, based on the results of implementation of the methodology of technology selection for purifying exhaust and effluent gases from toxic components of industrial, public and domestic power units up to 1000 kW developed by the authors. The full-scale laboratory studies of the semi-industrial model of the developed device were carried out by the authors. These studies allowed us to define the nitrogen oxide and sulfur removal efficiency depending on the electric voltage, the shape of the device’s side wall in layout, the submersion of inlet and outlet pipe side holes, the ratio of the anode total area to the cathode one. Moreover, the authors have revealed the device scope of application and its advantages. The article states that the proposed device provides environmental safety of the implementation process in comparison with the use of chemical alkaline solutions, which are dangerous for human health and environment.
Optimization of control program for CNC machines with regarding dynamic stability of cutting process and optimum modes of treatment in conditions of digital production
Authors: Kabaldin Yuri G. , Shatagin Dmitrii A. , Kolchin Pavel V.
Published: November 2018

The method for optimizing control programs for CNC machines based on artificial intelligence approaches, in particular, the apparatus of artificial neural networks, is outlined. A neural network model of the dynamic stability of the cutting process is proposed, which makes it possible to simulate the dynamics of the cutting process using the CAM system.
Research of thickness by using subminiature eddy-current transducers
Authors: Dmitriev Sergey F. , Malikov Vladimir N. , Sagalakov Anatoly M.
Published: November 2018

On the basis of an eddy-current transducer of a transformer type, a measuring system is made, which makes it possible to estimate the possibility of using the eddy current method for measuring the thickness of conductive and dielectric coatings placed on a conductive base. The purpose of this work was to evaluate the possibility of using only an amplitude eddycurrent method for determining the thickness of a conductive or dielectric coating on a conductive base and estimating the error of such measurements. The design of the measuring system and measurement techniques is described. The article presents data demonstrating the dependence of the amplitude part of the signal on objects of different thicknesses; limiting object dimensions at which these measurements are expedient are experimentally established.
The method of dynamic operating modes investigation in electrohydraulic drive systems with improved accuracy of positioning executive elements
Authors: Grechikhin Valeriy V. , Galka Galina A. , Ozerskiy Anatoliy I. , Shoshiashvili Mikhail E.
Published: November 2018

The article describes the method of dynamic operating modes investigation in electrohydraulic drive systems with improved accuracy of positioning output element. The method is the evolution of the fundamental positions of the mechanics of continuous media with moving boundaries as applied to the research of non-stationary processes accompanying the operation of hydraulic drive systems with piston hydraulic machines. The method is based on generalized modeling (technical, physical, mathematical and computer), takes into account the peculiarities of mutual influence of electric and hydraulic machines during their joint work as part of the electrohydraulic drive, which raises the level and adequacy of actuators simulation, as well as the reliability of the assessment of their technical condition. The method extends the field of research, improves the accuracy of the calculation of the positioning of the executive elements, taking into account the different dynamic modes of the drives under study.
Correctness investigation for the suspension transport problem in coastal systems
Authors: Sukhinov Alexander I. , Sidoryakina Valentina V. , Protsenko Sofya V.
Published: November 2018

This article is devoted to the confirmation the need for using a set of 3D dynamics models describing the various hydrophysical characteristics of the studied object to solve practical problems associated with the assessment of the ecological state of the water reservoirs. The present paper is devoted to the study of the three-dimensional model of transport and sedimentation of suspended matter in the coastal zone. The model takes into account such parameters as water movement, diffusionconvection, complicated bottom and shoreline geometry, lifting, transport and sedimentation of slurry. The existence and uniqueness of the solution of the corresponding indicated model of the initial-boundary value problem haas been envestigateded for two typical bottom boundary condirions. Also solution stability of the boundary-value problem in depend of functions: initial condition, boundary conditions and the righthand side in the norm L2 for any moment of time 0 < T < +∞, and also in the time-integral norm L2 has been proved. The model may be basis for the construction of hydrophysics models used to describe processes in the extraction of minerals from the seabed, in the dissemination of suspensions in shelf regions.
Development of a subsystem for automatic protection of submersible pumps based on mathematical modeling
Authors: Pilipenko Alexander V. , Tashev Andrei A. , Sharifov Nail K.
Published: November 2018

In this paper, the authors produce a mathematical modelling of a piston pump, develop algorithms for the operation of a protection system, taking into account the results of mathematical modelling. The authors test the mathematical model on the operation of real equipment and analyze its accuracy.
The distribution of pollutants in the ground layer of the atmosphere in the presence of forest plantations
Authors: Chistyakov Alexander E. , Nikitina Alla V. , Protsenko Elena A.
Published: November 2018

The aim of the work is to study the influence of forest plantations on the distribution of pollutants in the ground layer of the atmosphere. The model that takes into account a variety of factors: the presence of forest plantations, the variability of pressure, density and temperature, the presence of a multicomponent impurity, etc., was proposed for the numerical modeling of the process of transferring air pollutants to air. The scheme obtained as a result of a linear combination of the central difference scheme and the «CABARET» scheme was constructed to approximate the convection operator in this paper. An analysis of the results of numerical experiments allows to conclude that the distribution of pollutants in a multicomponent air environment is most significantly affected by the density of vegetation, and insignificantly influenced by the width of the forest plantations area.
Assessment of car emission masses at the change of kinetic energy of the “engine – transport vehicle” system
Authors: Badalyan Liparit Kh. , Kurdjukov Vladimir N. , Ovcharenko Alla M.
Published: November 2018

Negative anthropogenic impact on the environment can lead to global changes in the natural cycle of substances in the biosphere and the climate change in general. Assessment of the mobile sources emission is an important component of the diagnosis of the urbanized landscapes ecosystem state. The effective power of the car engine is accepted as the characteristic unambiguously reflecting the movement of the vehicle. The algorithm of determination of pollutants emission masses is stated in the article and unique calculation of relative effective power of the engine is presented. The current value of the engine effective power taking into account transformation of variable parameters to the coded sizes depending on kinematic and dynamic factors is calculated from the equation of the car movement at the change of kinetic energy of the “engine - transport vehicle” system in the form of Lagrange. Such dynamic characteristics as coefficient of the rotating masses and coefficient of mechanical efficiency of transmission are presented by functions of the engine relative effective power. Results of the research considerably simplify calculation of pollutants emission masses by traffic flow into the atmosphere and can be used for assessment of negative anthropogenic impact on the ecosystem.
Contour detection in an infrared image using the modified snake algorithm
Authors: Voronin Viacheslav V. , Balabaeva Oxana S. , Pismenskova Marina M. , Tokareva Svetlana V. , Tolstova Irina V.
Published: November 2018

Infrared and thermal images have been used widely in the different forensics and security applications. Such images show the temperature difference between different objects and scene background. One of the drawbacks of such images is low contrast and noisy images which should be enhanced. This paper presents a new thermal image contour detection algorithm using the modified snake algorithm. The segmentation algorithm based on the image enhancement and the modified model of active contours based on regions, taking into account the calculation of the anisotropic gradient. Some presented experimental results illustrate the performance of the proposed cloud system on real thermal images in comparison with the traditional methods.
Digital economy, the development ways of cryptocurrency
Authors: Ananova Oxana G.
Published: November 2018

The article is devoted to new directions of development of the digital economy. The analysis of technology development and cryptocurrency blokcheyn. Analyzed the problems and prospects of transition to digital economy technology.
Human body measurement system based on RGB-D camera using
Authors: Fisunov Alexander V. , Gnezdilova Victoria B.
Published: November 2018

This paper proposes a non-contact method for obtaining dimensional features of a person using an RGB-D camera and analysing a 3D model of a human model constructed using such a camera.
Shooting parameters measuring from videostream during sports competitions
Authors: Beloyvanov Maxim S. , Sadrtdinov Ilya A.
Published: November 2018

This paper proposes the method for determining the time and coordinates of hits on targets on the video stream during sports competition. Proposed method allows reduce the number of false alarms of the detector associated with such negative factors at video stream as environment conditions changing, occlusion, video compression artifacts, etc.
Les enjeux d'une nouvelle interface
Authors: Makaremi M.
Published: November 2018

Les progrès effectués dans les domaines de l'intelligence artificielle et des sciences informatiques auront un impact majeur sur la pratique médicale au cours des décennies à venir. Les investissements considérables déployés par les géants du numérique dans leur filiales santé en sont la preuve.

Les stratégies d'automatisation dont pourraient, quand ils ne le peuvent déjà, bénéficier les praticiens, génèrent peurs et fantasmes. Elles invitent à procéder très rapidement à la réflexion sur les enjeux de l'interface homme-machine (IHM) dans les pratiques médicales et en particulier dans le domaine de l'orthopédie dento- faciale.

Les algorithmes sont certes supérieurs au cerveau humain pour décrypter et analyser des données mais il leur est impossible de créer des codes informatiques pour modéliser le sens clinique. C'est là que réside la plus-value de nos cerveaux - et pour longtemps encore.
Analyse génétique et physiologique
Authors: Benoît R.
Published: November 2018

Les gènes du développement ont d'abord été mis en évidence chez la drosophile en 1950 (gène HOM), puis chez la souris en 1970 (gènes Hox). Ces gènes codent pour la mise en place de « champs », puis de populations cellulaires, puis de « systèmes composites ». Au cours de l'évolution, le cerveau et les cellules des crêtes neurales sont responsables, par l'intermédiaire de ces gènes et de leurs protéines du développement des divers systèmes composites du crâne et de la face et de leurs fonctions. Nous isolerons le système dentaire, le système musculaire, avec le système squelettique comme soutien avant intégration. Par des exemples cliniques différents nous proposerons une analyse génétique et fonctionnelle.
Protective effects of resveratrol against X-ray irradiation by regulating antioxidant defense system
Authors: Salehi S. , Bayatiani MR. , Yaghmaei P. , Rajabi S. , Goodarzi MT. , Jalali Mashayekhi F.
Published: November 2018

Ionizing radiation interacts with biomolecules to produce free radicals, which can damage all components of the cell. The aim of this study was to evaluate the protective effects of different doses of resveratrol against X-ray-induced damage in male rat. The animals were divided into five groups, each composed of six rats: two groups as control groups received saline or ethanol (ethanol in saline, 25%, V/V as a vehicle). Two groups received resveratrol (5 and 10 mg/kg.bwt) for 30 days before X-ray exposure. One group received X-ray. The rats were sacrificed 24 h after the last exposure, blood samples were collected and serum level of malondialdehyde (MDA), total antioxidant capacity (TAC), and the activities of superoxide dismutase (SOD) and catalase (CAT) were measured by spectrophotometric method. X-ray irradiation significantly increased the levels of MDA and decreased TAC as well as SOD activity as compared with control groups. Furthermore, resveratrol pretreatment led to remarkable decrease in MDA concentration and increase in the activities of SOD and CAT as well as TAC compared to those of controls. Our results revealed antioxidant properties of resveratrol and suggest it as a potent radioprotector to ameliorate X-irradiation induced damage in the body.
Transition trajectories from youth institutional care to adulthood
Authors: Trapenciere Ilze
Published: November 2018

The main trajectories of transitions have essential importance for a child and youth living in child long-term institutional care – moving from family care to institutional care, life in institution(s), and the second trajectory – transition from institution to independent adult life. In this article trajectories of child and youth transitions from institutional care are discussed. The study is based on the qualitative methodology. Methods used – 20 interviews with staff of the institutions and youth leaving the institutions. The trajectories of the transitions are analysed on the basis of the assessment of existing practice.
Perestroika and personality: Transformation of gender stereotypes amongst the youngsters in Russia
Authors: Uryvaev Vladimir
Published: November 2018

Introduction. The dynamics of gender stereotypes amongst the youngsters can provide important evidence about the tendencies in the changes of behavioural stereotypes in society. Goal. To conduct a psycho-diagnostic evaluation of the changes in basic personal characteristics of young students (boys and girls) caused by the perestroika processes in the Russian society. Results. The comparison of two groups of medical students (both groups are identical: the second course, the department of general medicine, Yaroslavl State Medical University. Testing of 1992 and 2006 using the 16-PF Questionnaire and MMI – J. Nuttin) reveals at least two main tendencies in the aspect of gender differences. The first tendency is the advance increase of girls’ adaptive capabilities compared to boys. The changes in girls involve substantially enhanced dominance and efficiency of self-regulation. The second notable tendency is a considerable review of values (J. Nuttin) in the “perestroika generation”. The values of self-realization, work, and social motivation are increased in both boys and girls. However, girls report substantially lower manifestation of self-analysis and value of passive recreation, while boys show the decreased value of cognitive and research motivation, as well as “transcendent motivation”. Discussion. The respondents from the first group were carried and born in 1972–1973 (the epoch of “stability” and “stagnation” in Russia). The respondents from the second group were carried and born in 1986–1987, just after the beginning of “perestroika” in society. Perestroika gave an impetus to the development of personality including gender sphere. The second group reports a higher level of need for independent and positive activity, and these tendencies are clearer in girls.
Connecting factor lex loci coindentiae testatoris et heredes hereditarium commodum as a basis for persons’ testamentary interests securing in regard to contractual succession
Authors: Pilipson Edvard
Published: November 2018

Obligation law unstable nature under contractual succession discrete situations forces to find appropriate connecting factor which secures involved persons testamentary interests. Because of this, the aim of this work is to summarize connecting factors, using in testamentary and obligation law and to prove the necessity of a new connecting factor for contractual succession.
The presence of violence at work of health care personnel and their work ability
Authors: Bula Santa , Deklava Liana , Reste Jelena , Lusena-Ezera Inese
Published: November 2018

Proportion of health care workers of those who believe that the work in progress threatens their health and safety is higher than the average in other sectors. Workers in health care facilities are especially exposed to violence in the workplace [1]. The aim of the study was the evaluation of the presence of violence at work and determination of its effect on the working ability of health care sector workers. The study included the survey of 132 emergency department employees (doctors, physician assistants, nurses) from Kurzeme Region hospitals (Latvia). Questionnaire of violence in the workplace of the health care sector workers and the work ability index assessment questionnaire were used for the data collection. It was found that medical staff of health care establishments experience mostly verbal abuse (97%), less from physical attacks (36%), and intimidation/bullying (30%). The study found that medical personnel are aware of the changes implemented in the workplace (29%), there has been no change (33%), while the impact of changes implemented by medical staff at the workplace has not been experienced (47%). For personnel who have suffered from violence in the workplace, working capacity is generally lower than for the personnel that has not experienced violence in the workplace.
The role of the Occupational Court of Latvian Medical Association in the system of legal liability of medical practitioners
Authors: Liepins Aldis , Joksts Osvalds , Vetra and Janis
Published: November 2018

The articleThe Role of the Occupational Court of Latvian Medical Association in the System of Legal Liability of Medical Practitionersdescribes the system of professional liability of medical practitioners, analyzing in details one of the institutions, which ensures professional liability of doctors and dentists – the Occupational Court of Latvian Medical Association. The article characterizes the position and role of the Occupational Court in the system of legal liability of medical practitioners, researches legal regulation for operations of the Occupational Court, the essence of the Occupational Court proceedings and the legal nature of decisions made in the Occupational Court. The article identifies potential problems in operations of the Occupational Court, making proposals how to eliminate the problems found out. The authors offer to expand the competence of the Occupational Court in the future. The article also touches upon such problematic issues relating to legal liability of medical practitioners as doctor's errors and medical errors, causality, etc.
Changes in muscular strength based on full cervical flexion
Authors: Vetra Janis , Sklarevich Vladimir , Anoufriev Gregory , Kalnins Imants , Vetra Janis , Umbrasko Silvija , Kotovs Vladislavs , Beilina Larisa
Published: November 2018

We present our study of influence full cervical flexion position on the changes in muscle strength of the upper extremities. This position is typical for a person working on mobile phone or iPad. The purpose of the study was determination of the connection between change of the head flexed position and changes in upper extremity muscles strength. The present study involved 80 healthy volunteers and was performed at the Department of Morphology in Riga Stradins University, Riga, Latvia. For measurements we have used the MicroFET2 Hand Held Digital Muscle Tester to determine the strength of the muscles of the hand and arm (M. abductor pollicis longus, M. biceps brachii, M. triceps brachii, M. deltoideus). The results of measurements were then used to analyze the difference in the strength of the muscles innervated by the spinal cord cervical region (C5–C8 nerves) for the same person sitting in the vertical position and sitting with the head flexed maximally. The results of our study support the hypothesis that the changes in the strength of measured muscles are related to the mechanical distension of the spinal cord, which leads to changes in spinal cord's blood supply. The kyphotic position of the cervical spine during head flexion shows that in the spinal cord segments C5 and C7 are formed mechanical distension. Using our statistical study, we can conclude that there is strong relationship in the strength change in some of the observed muscles between vertical position and full flexion of head
Prestige of social work as profession: Social worker's perspective
Authors: Vilka Lolita , Baha Irina
Published: November 2018

Various studies show that the rating of the social workers profession is not very prestige in comparison with other professions. Often the leading motives why people choose to do social work are those guided by relative ideals, such as the desire to help people or to accomplish something socially significant not because of the prestige of profession. However, judgements about the occupational prestige in the wider community depend largely on the professional beliefs of social workers themselves and on how social workers themselves are positioning their profession. The focus of the authors of this article on the occupational prestige is analysed from the perspective of social workers in the sector. The study was carried out using a quantitative approach. In this study, the occupational prestige is considered in the context of symbolic capital. According to P. Bourdieu all forms of symbolic capital accumulates through relations of exchange The study results indicate that a significant part of the respondents feel the lack of authority and symbolic power. The symbolic capital in the form of professional capital is an essential factor of the authority and symbolic power of the social worker's profession, which, in turn, affects the occupational prestige in the society.
Development of service pension policy in Latvia from 1996 until 2016
Authors: Upite Inese , Rajevska Feliciana
Published: November 2018

The government made a decision to terminate the development of the service pension in 1997. However, during 1998–2016 the scope of service pension beneficiaries was extended. Thereby along with the overall social insurance pension system, the social pension scheme has been established and developed for a certain range of people funded by the state budget – the system of the service pension. The aim of the article is to explore the development of the service pension policy during 1996–2016. To accomplish it, in the framework of the study concepts related to the service pensions and the tendencies of reformation of the service pension schemes were studied. The international practice and the experience of several countries were explored, as well as the analysis of legal acts, policy planning papers and statistics was performed. The purpose of the service pension has changed and diversified, moreover, the issues regarding the service pension coverage are promoted by a group of politicians, escaping a wider discussion in public and even in the government.
Unterkieferprotrusionsschiene bei obstruktivem
Schlafapnoesyndrom getestet
Authors: Herzog Michael
Published: November 2018

Marco Pitarch R et al. Effectiveness of a mandibular advancement device in
obstructive sleep apnea patients: a prospective clinical trial. Eur Arch
Otorhinolaryngol 2018; 275: 1903–1911

In einer prospektiven Studie wurde die Effektivität einer
Unterkieferprotrusionsschiene (mandibular advancement device, MAD) bei
Patienten mit obstruktivem Schlafapnoesyndrom getestet. Evaluiert wurden
dabei verschiedene Merkmale der Patienten und der MAD als Prädiktoren des
Behandlungsergebnisses.
Zertifikat „Wundmanagement“ der DDA
Authors: Dissemond J.
Published: November 2018

In Deutschland leiden aktuell mindestens eine Million Menschen an einer chronischen Wunde unterschiedlichster Genese. Das zentrale Ziel der immer komplexer werdenden Wundtherapie ist es, die physiologischen Prozesse der zuvor gestörten Wundheilung zu unterstützen. Dies kann nur dann gelingen, wenn die Ursachen der Wundheilungsstörungen korrekt diagnostiziert und, wenn möglich, auch therapiert werden. Aus diesem Grund wurde 2008 auf Anregung der DDA ein entsprechendes Curriculum durch eine Expertengruppe der Arbeitsgemeinschaft Wundheilung (AGW) der DDG erstellt. Der Gesamtumfang der Weiterbildung umfasst 16 Stunden, aufgeteilt in zwei Fortbildungseinheiten à 8 Stunden. Der Teil 1 hat den Schwerpunkt „Genese und Diagnostik“, der Teil 2 „Therapie“. Für den Erwerb des Zertikats „Wundmanagement“ der DDA ist es notwendig, Facharzt für Dermatologie und Venerologie zu sein und zusätzlich beide Kurse absolviert zu haben.
Mucinous cystic neoplasm diagnosed by EUS-guided microforceps biopsy
Authors: Orr Jordan , Lockwood Robert , Salaria Safia , Gamboa Anthony , Yachimski Patrick
Published: November 2018

Background and study aims Mucinous cystic neoplasms (MCNs) of the pancreas have malignant potential. Current methods for diagnosing MCNs are inadequate. The aim of this case series is to present a novel method for establishing the diagnosis of MCNs. Clinical information from three patients seen at our institution was collected for a case series presentation. Patients were selected retrospectively based on diagnostic results. Three patients were diagnosed with MCNs based on histopathology obtained via microforceps biopsy. Evolving tissue acquisition techniques, such as microforceps intracystic biopsy, have improved the diagnostic yield of endoscopic ultrasound (EUS).
Successful treatment of paediatric lower limb CRPS by
continuous epidural anaesthesia: a report of 2 cases
Authors: Zyluk Andrzej , Puchalski Piotr
Published: November 2018

CRPS occurs in children less frequently than in adults, but in the last two
decades it has become a well-established entity in children and adolescents. The
symptomatology, course, responsiveness to treatment and prognosis of the
paediatric disease is also different from the “adult” form. The paper presents
the successful treatment of two cases of paediatric CRPS involving the lower
limb, by continuous epidural anaesthesia with bupivacaine. Both patients
developed the condition after minor trauma or overuse. CRPS diagnosis was based
on clinical grounds. Both patients presented a history of psychological
distress, due to familial problems. In one patient, the initial treatment was
lumbar sympathetic block, resulting in immediate and complete recovery. After
relapse of the disease at four months, the next intervention included continuous
epidural infusion of bupivacaine, with an excellent and rapid response. In the
2nd case, continuous epidural infusion was used primarily with
the same, excellent and fast result. The article discusses clinical
peculiarities, treatment modalities and other aspects of paediatric CRPS. Poor
awareness of the condition in the paediatric community is also emphasized
Antineutrophil Cytoplasmic Antibody–Associated Lung Fibrosis
Authors: Borie Raphael , Crestani Bruno
Published: November 2018

Pulmonary fibrosis is observed in a substantial number of patients with ANCA-associated vasculitis (AAV), 15% in a recent German series, and may be more frequent in Asian populations. ANCA are usually of anti-MPO specificity and microscopic polyangiitis is the most frequent vasculitis. Pulmonary fibrosis may increase the risk of death in patients with AAV. Treatment for AAV in patients with lung fibrosis should follow the international guidelines for vasculitis. The role of anti-fibrotic drugs (pirfenidone, nintedanib) in this condition is still unknown. Pulmonary fibrosis precedes the diagnosis of AAV or is diagnosed concomitantly in most of the cases. Interestingly, 4% to 35% of patients with pulmonary fibrosis are ANCA-positive, but only 7% to 23% of the patients with pulmonary fibrosis and anti-MPO will develop AAV during follow-up. ANCA positivity may be detected in idiopathic or non idiopathic pulmonary fibrosis. In the absence of vasculitis, the detection of ANCA does not influence the diagnostic work-up of patients with lung fibrosis. If an Idiopathic Pulmonary Fibrosis diagnosis is considered, an anti-fibrotic therapy should be considered, according to local and international guidelines.
A MSK Radiologist's Early Experience as a Department Chair: Climbing the Horizontal Ladder
Authors: Casagranda Bethany
Published: November 2018

A radiologist's training is designed to produce a professional with excellent interpretation skills. However, in today's health care environment, a successful radiologist may not be a successful leader or the opposite may be true. Leadership requires a different set of skills with knowledge of common concepts across all levels of health care delivery. When asked to take on administrative responsibilities, you anticipate constant work with occasional glory, but you may not realize the ladder of success is actually horizontal and the spotlight quite bright.

In this personal narrative, I have illustrated my pathway to the chair position in the context of climbing the career ladder and entering the stage of leadership. I discuss common concerns facing radiology today and how we can all use our experience and leadership skills to overcome these challenges with effective solutions.