bluuebunny/crossref_metadata_2025 huggingface dataset:
Control Problem for Unsteady Magnetohydrodynamic Flow of Viscous Heat Conducting Fluid
Authors: Tereshko Dmitry
Published: February 2016

This work is devoted to control problem for unsteady flow of heat and electrically conducting fluid at small magnetic Reynolds numbers. This problem is connected with vortex reduction using temperature control on some parts of the boundary. Numerical algorithm based on finite-dimensional minimization is proposed and numerical results are discussed.
Influence of a Porous Insert on the Fluid Flow inside the Gasifier Shaft
Authors: Openyshev Pavel V. , Sheremet Mikhail A.
Published: February 2016

Turbulent fluid flow inside the vertical gasifier shaft having the porous insert has been numerically analyzed. The effect of the porous medium structure on the fluid flow has been studied. The mathematical model has been formulated in dimensional primitive variables using the realizable k-ε turbulent model. The distributions of velocity and skin friction coefficient inside the gasifier shaft have been obtained. The results clearly show an essential effect of the porous medium structure on turbulent fluid flow.
Mathematical Simulation of Hydraulic Power Pulse Machine at Matlab
Authors: Novoseltseva M.V. , Pashkov E.N. , Masson I.A.
Published: February 2016

General idea of mathematical simulation is set. Equations that describe hydraulic power pulse machine operation are described. Restriction factors are identified; they are included in mathematical model simulation. Mathematical simulation results are shown for essential parts of machine. Results of hydraulic power pulse machine mathematical simulation are presented.
The Numerical Study of a Dropwise Condensation Mode when Cooling Heat Transfer Surfaces
Authors: Krainov Alexander V. , Pashkov E.N. , Lushnikov Roman E. , Arkhipov Vladimir A.
Published: February 2016

A two-dimensional nonstationary model of calculation of heat transfer at viscous fluid droplet spreading over the heated substrate is presented. A process of the fixed droplet spreading over a simple geometry substrate has been calculated. A hydrodynamic picture of the process of spreading has been obtained. The influence of the parameters of the model on the nature of spreading has been studied. The temperature profiles at the droplet surface have been obtained. The setting time of the stationary mode has been evaluated.
Convection Heat Transfer on a Vertical Surface in Porous Media
Authors: Bocharova Anna A. , Plaksina Irina V.
Published: February 2016

Free convection on a vertical surface with Newtonian heating of the form proposed by Merkin (1994) in the fluid-filled porous medium is considered on the basis of the full equations of a viscous liquid. Using dimensional analysis a set of criteria that define the characteristics of flow and heat transfer was derived. Asymptotic analysis of the full equations allowed us to determine the region of applicability of the boundary layer approximation, which was used in the previous studies of this problem. Darcy parameter influence was studied; the composite numerical and analytical solution for stream function and temperature was derived.
Study of Bone Tissue Stress and Strain State Aimed at Development of Intelligent Biomaterials for Osteoimplantation
Authors: Kolmakova Tatyana V.
Published: February 2016

This article studies the stress and strain state of simulated microvolumes of compact bone tissue under uniaxial compression, having different orientation of collagen-mineral fibers, different porosity and mineral content. The purpose of the study is to work out recommendations on development of artificial mechanically compatible biomaterials for osteoimplants. It has been found out that it is necessary to take into account the effective mechanical parameters defining the distribution of the bone tissue stress and strain when making individual implants.
Experimental Studies of Thermoelectric Characteristics of Plastically Deformed Steels ST3, 08KP and 12H18N10T
Authors: Soldatov A.I. , Soldatov A.A. , Kostina M.A. , Kozhemyak O.A.
Published: February 2016

The article presents the results of experimental studies of the thermoelectric characteristics of plastically deformed steels ST3, 08KP, 12H18N10T. Measurements in the area of maximum deformation of the samples were carried out. Differences in the thermoelectric characteristics of plastically deformed steels were revealed. Steel 12H18N10T has linear characteristic, and characteristics of steels ST3 and 08KP have extreme. Constant temperature between the hot and cold electrodes needs to be maintained and also the temperature of the test specimens needs to be monitored, which in the differential testing method equals to cold electrodes. Novel block diagram of a device for testing of thermos electromotive force and monitoring of the cold electrodes temperature is proposed.
Hydraulic Power of Vibration Test Stand with Vibration Generator Based on Switching Device
Authors: Nizhegorodov A.I. , Gavrilin A.N. , Moyzes B.B.
Published: February 2016

The article reviews the problems of vibration stand development for vibration testing of technological devices with hydraulic power equipped with a switching device to create modes for tested products pre-scanning and to carry out resonance frequency tests. The proposed development will enhance the effect of such tests due to spectrally rich vibrational impact on tested products.
Effect of Ultrasonic Impact Treatment on Microstructure and Mechanical Properties of Commercial Purity Titanium
Authors: Hairullin Rustam , Kozelskaya Anna , Kazachenok Marina
Published: February 2016

The paper presents a study of the ultrasonic impact treatment effect on the microstructure and mechanical properties of commercial purity titanium (CP-Ti). The texture, residual stresses, the size of coherent scattering region, the thickness of plastic deformation layer and the microhardness of CP-Ti specimens subjected to ultrasonic impact treatment were studied. It was found that ultrasonic impact treatment of CP-Ti specimens resulted in severe plastic deformation of their surface layer. The plastic deformation caused twin and low angle boundary formation in the surface layer. The last-named led to a crystallographic texture change, a decrease in the size of coherent scattering region, an increase in compressive residual stresses and a growth of microhardness of the surface layer of titanium specimens.
Investigation of Lamb Wave Based Ultrasonic Technique for AA2024 Evaluation at Static Tensile Loading
Authors: Byakov Anton V. , Eremin Alexander V. , Burkov Mikhail V. , Shah Ronak T. , Lyubutin Pavel S. , Panin Sergey V.
Published: February 2016

In the paper the results of Lamb wave ultrasonic technique for evaluation of AA2024T3 specimens during tensile testing are presented. Three piezoelectric transducers (PZT) used as an actuator and two sensors were glued on the specimen surface using epoxy adhesive. Two frequencies of testing signals (50 kHz and 335 kHz) were used. The set of static tensile tests were performed. The recorded signals were processed to calculate the informative parameters to evaluate the changes of the stress-strain state of the specimen and its microstructure.
Lamb Wave Based Ultrasonic Technique for AA2024 Fatigue Evaluation
Authors: Burkov Mikhail V. , Eremin Alexander V. , Byakov Anton V. , Shah Ronak T. , Lyubutin Pavel S. , Panin Sergey V.
Published: February 2016

Experimental results of Lamb wave technique investigation for evaluation of fatigue state of AA2024T3 specimens under cyclic loading conditions are presented. Analysis of acoustic signal data obtained by the piezoelectric transducers network was done through the calculation of two parameters: maximum envelope and 2nd central moment. Understanding of relations between acoustic signals features and emergent damages will provide the ability to determine the state of the structure and evaluate the defects, therefore assume the preventative measures and avoid accidents.
Improving Reliability of Hot Plate Mill Electromechanical System
Authors: Radionov Andrey A. , Gasiyarov Vadim R. , Maklakova Ekaterina A.
Published: February 2016

The paper considers issues of a mathematical model development of a “deformation zone - main electric drive” concerning hot plate mills. The dependence of the calculation of rolling torque on features of high deformation zone is given. Based on the obtained expressions, the structural diagram of the deformation zone model has been developed. The paper specifies the structure of the mathematical model for electric drive speed control system based on the known equations of synchronous motor. After the comparison of the transient processes of the electric drive coordinates and rolling settings obtained at the modeling and oscillography at the mill the conformity of the developed model to the studied object has been proved. The provided mathematical model is recommended to analyze the dynamic percussion leads that occurred at hot plate mill. The model obtained allows it to improve the reliability of the electromechanical system owing to the adaptation of the rolling schedule at the real-time operation mode.
The Influence of the Pouring Temperature on the Structure and Properties of Copper Metal Alloys
Authors: Korchmit Anton Viktorovich , Martyushev Nikita V. , Drozdov Yuriy Yu.
Published: February 2016

The paper presents the information on the temperature influence on the structure and properties of copper alloys. The results of mechanical testing of samples made of tin-base bronzes depending on the pouring temperature and section thickness of the casting have been discussed. The correlation between the superheat value and distribution of structural constituents of multicomponent tin-base bronzes has been considered. It has been ascertained that the increase in the pouring temperature not only causes grain refinement in eutectoid and lead impurities in tin-base bronzes, but also has a favourable effect on their hydrostrength.
Pressure Losses of Power-Law Fluid Flow through an Axisymmetric Sudden Contraction
Authors: Borzenko Evgeny , Boyarkina Kira , Shrager Gennady R.
Published: February 2016

In this paper the laminar stationary power-law fluid flow through an axisymmetric pipe contraction is investigated. The mathematical statement of the problem is formulated using stream function and vorticity variables. For obtaining a stationary solution the relaxation method with following realization of numerical algorithm based on finite difference alternative directions scheme is utilized. Implemented parametrical investigations allow obtaining the dependence of local resistance coefficients on Reynolds number, nonlinearity degree and piping contraction ratio.
The Possibility of Manufacturing Long-Length Metal Products with Ultra-Fine Grain Structure by Combination of Strain Effects
Authors: Chukin Mikhail , Polyakova Marina , Gulin Alexandr , Nikitenko Olga
Published: February 2016

It is shown that combination of strain effects leads to possessing the ultra-fine grain structure in carbon wire. The continuous method of wire deformation nanostructuring was developed on the basis of simultaneous applying of tension deformation by drawing, bending deformation when going through the system of rolls and torsional deformation on a continuously moving wire. One of the main advantages of the developed method is that various hardware devices and tools already applied for steel wire production can be used to implement this method thus simplifying its introduction to the current industrial equipment. The efficiency estimation of the developed continuous method of deformation nanostructuring was carried out using carbon wire with different carbon content. It is shown that the mechanical properties of the wire after combination of different kinds of strain can vary over a wide range. This method makes it possible to choose such modes of strain effect, which can provide the necessary combination of strength and ductile properties of carbon wire depending on its further processing modes and application.
The Mathematical Model of Reflection and Refraction of the Longitudinal Shock Wave at the Interface of Two Nonlinear Elastic Media
Authors: Dudko Olga V. , Shtuka Victor I.
Published: February 2016

The results of mathematical modeling of the dynamic interaction of a plane longitudinal shock wave with a plane interface between two isotropic nonlinear elastic materials are presented. The mechanical properties of deformable solid are given by the elastic Murnaghan model. The dynamic processes of deformations distribution are studied in the framework of the theory of singular surfaces. The numerical solutions of the corresponding self-similar problem with strong and weak deformations discontinuities in the reflected and refracted wave packages have been obtained on the basis of the developed scheme of computational experiment.
Two-Step Synthesis of Tungsten and Molybdenum Disulfides
Authors: Irtegov Yuriy , An Vladimir , Machekhina Ksenia , Lemachko Nikolay
Published: February 2016

Efficient two-step technique of tungsten and molybdenum disulfides obtaining from metal nanopowders produced by EEW and elementary sulphur is described. Tungsten and molybdenum nanopowders surface area dependence on wire length is studied. Features of metal and sulphur combustion process are discussed. It is determined sulphur excess in reagents 15 wt.% results in mono-phase metal disulfide formation with small free sulphur concentration in reaction products.
Strains Determination at the Joints of Cylindrical Glass-Metal Composite Shell Layers
Authors: Ratnikov A.A.
Published: February 2016

The analytical method of residual strains determination on joints of layers of a glass-metal cylindrical shell arising in the course of its cooling description is provided in article. For the numerical implementation of the proposed model modern numerical and digital-analytical methods were used. In connection with the exponential change of the required functions close to butt ends of the shell numerical methods lead to instability of calculation. In order to overcome this obstacle, Godunov’s method of discrete orthogonalization was applied. It has significantly leveled disturbance peaks of strains on the surfaces conjunction of the composite shell layers.
Microwave Composite Absorbers Based on Barium Hexaferrite/Carbon Nanotubes for 0.01-18 GHz Applications
Authors: Dotsenko Olga A. , Frolov Kirill O.
Published: February 2016

Nano- and microstructured composite materials have opened a new era for multifunctional materials. In particular, barium hexaferrites and carbon nanotubes can be applied in order to improve electromagnetic properties in composites. Magnetic materials with a texture based on barium ferrite and carbon nanotubes were obtained. The electromagnetic properties of Z – hexaferrites / carbon nanotubes composites were measured at microwave frequencies. It was shown, that imaginary permeability of barium hexaferrites/carbon nanotubes multilayer composites with double texture is as much as that of an isotropic samples at regions 3.4 – 8.5 GHz and 7.1 – 11.6 GHz.
Self-Propagating High-Temperature Synthesis of Composite Nanopowder AlN-BN from Systems "Sodium Azide – Halides of Aluminum and Boron"
Authors: Shiganova Ljudmila , Bichurov George , Kerson Irina , Novikov Vladislav , Ermoshkin Anton
Published: February 2016

The composite powder of AlN-BN is of interest from the point of view of the use for sintering the AlN-BN composite ceramics. The ceramics compared with AlN ceramics would have better thermal shock resistance, less britlleness, better machinability, good heat conductivity and tribological properties. Possibility of obtaining a composite powder of AlN-BN with the application of process of self-propagating high-temperature synthesis (SHS) from powder mixtures of NaN3 and precursors of aluminum and boron was investigated. Halide salts AlF3, Na3AlF6, KBF4 and NH4BF4 were used as the precursors. It was shown that these mixtures are capable of burning and obtaining agglomerated composite powders from nanosized (50-170 nm) particles.
Effect of Aluminum Content on the Performance of Coatings Based on Al-Si-N
Authors: Bozhko Irina A. , Rybalko Evgeniya V. , Kalashnikov Mark P. , Fedorishcheva Marina V. , Sergeev Victor P.
Published: February 2016

The transparent coatings on the basis of Al- Si- N system with high Al content and the opaque Al-Si-N with a low Al content were prepared by impulse magnetron sputtering method. Structural-phase state of the two types of coatings was examined by X-ray analysis. The microhardness was measured by nanoindentation method. The microhardness, the elastic modulus and the coefficient of elastic recovery were determined. Also the optical transmission was measured for all types of samples.
Analysis on the Applicability of Diffusion Approximation for the Radiative Transfer Equation with Compton Scattering
Authors: Yarovenko Ivan
Published: February 2016

This paper deals with a diffusion approximation for the radiation transfer equation which takes into account Сompton scattering on electrons. An analytical and a numerical examples are used to compare the solution of radiation transfer equation with its diffusion approximation.
Dissipation of Pulsed Electron Beam in Hydrogen and Oxygen in High Pressure
Authors: Tabaev Alexander , Kholodnaya Galina , Sazonov Roman , Ponomarev Denis
Published: February 2016

This paper presents results of study of dissipation processes of pulsed electron beam in the oxygen and hydrogen (300 Torr). These gases are chosen owing of their use as a operating environment at pulse plasmochemical synthesis of nanosized oxides of metals. Experimental studies are conducted on the laboratory TEU-500 electron accelerator (500 keV electron energy; 10 кА ejected electron current; 60 ns half-amplitude pulse duration; 5 pps pulse repetition rate; diameter of a bunch is 5 cm). The electron beam was removed in a drift pipe through the anode window which is the supporting lattice (with optical transparency of 95%) and through aluminum foil 140 microns thick. The pipe of drift is equipped with three shunts of the return current which are fixing a signal at the same time. The received results of researches allow to make a conclusion. It is necessary to increase length to 80 cm and diameter to 30 cm of a pipe of drift for optimum absorption of a pulse electron beam by operating gas, for obtaining high efficiency of electron accelerator of pulse plasmochemical synthesis of nanosized oxides of silicon and the titan.
Coating Composition Evolution during the Deposition of Al and N from Plasma on a Cylindrical Substrate
Authors: Shanin Sergey A. , Knyazeva Anna G. , Kryukova Olga
Published: February 2016

This paper presents the results of the numerical study of the coating composition evolution deposited on a cylindrical specimen from plasma containing aluminum and nitrogen. Calculations were based on a coupling model, which accounted for various transfer mechanisms and staged chemical reactions in the coating and in the transient zone. The evolution of the coating composition is connected with transfer processes, chemical reactions, and with the change of effective properties.
Simulation of the Acoustic Field of Antenna Arrays
Authors: Bolotina Irina O. , Kvasnikov K.G. , Steinbrecher Anastasia A. , Kroening H. Michael , Osokin Georgii E.
Published: February 2016

The article considers the reconstruction of images by Synthetic Aperture Focusing Technique (SAFT). The work compares additive and multiplicative methods for processing signals from antenna array. We have proven that the multiplicative method gives better resolution. The study includes the estimation of beam trajectories for antenna arrays using analytical and numerical methods. We have shown that the analytical estimation method allows decreasing the image reconstruction time in the case of linear antenna array implementation.
Production of Powders by the Method of Electrospark Dispersion
Authors: Zhuravkov Sergey P. , Kornev J.I. , Ivashutenko Aleksander S. , Martyushev Nikita V.
Published: February 2016

This article is devoted to the research of powders for the additive technologies made by EOS Company. Their analysis showed that the powders’ average diameter is about 30 microns. Powders are received by method of electrospark dispersion. The X-ray diffraction and metallographic analysis of these powders is presented.
Regularities of Structure and Phase Composition Formation of Surface Layer of Silumin Subjected to Electron-Beam Treatment
Authors: Tkachenko Alina V. , Petrikova Elizaveta A. , Ivanov Yuriy F. , Teresov A.D.
Published: February 2016

It has been shown that electron beam treatment of silumin is accompanied by the formation of multilayer submicro-and nanocrystalline structure and result in increasing the microhardness of the surface layer (towards the core) is ~ 1.5 times up to 2 GPa. Investigation of cross-sections of the samples also showed an increase of microhardness of the surface layers up to 50 μm and 70 μm under the best conditions of irradiation on "GEZA-1" setup and "SOLO" setup respectively.
The Application of Electrochemical Technology in the Production of Ethylenediamine
Authors: Bykovsky N.A. , Puchkova L.N. , Fanakova N.N.
Published: February 2016

The processing of the light fraction formed during the separation of amines for components by rectification is investigated. The light fraction which is an aqueous solution with about 1% of ethylenediamine and 2% of ammonia is treated in an electrolyzer with ion-exchange membranes. It is shown that a concentrated product containing about 118 g/l of ethylenediamine, about 106 g/l of ammonia and purified water can be obtained in this case. The concentrated product can be used at the initial stage of amines production.
Synthesis and Characterization of Transition Metal Complexes of 1,2-Bis(3,5-Dimethylpyrazol-1-yl)-1,2-Ethanediol
Authors: Anosova Galyna A. , Matveevskaya Vladislava V. , Pirmanova Nurgul A. , Potapov Andrei S.
Published: February 2016

Copper (II), nickel (II) and vanadyl complexes of 1,2-bis (3,5-dimethylpyrazol-1-yl)-1,2-ethanediol were prepared by the reaction of transition metal salts (chloride, acetate, sulfate) with the ligand in ethanol solution. The composition of the complexes was confirmed by elemental analysis and molar conductivity measurements. The coordination modes of the ligand and counter-ions were established from IR spectra and DFT calculations.
Oxidative Conversion of Methane into Syngas Using Porous Catalysts Prepared by Combustion Synthesis
Authors: Kirdyashkin A.I. , Maznoy A.S. , Kitler V.D. , Vosmerikov Aleksandr V. , Vosmerikova L.N. , Barbashin Ya.E. , Sidorova O.I. , Knysh Yu.A.
Published: February 2016

Using the method of combustion synthesis, a series of porous cermet materials from nickel and oxides (such as NiO, MgO, Al2O3, ZrO2, and rare-earth oxides) was synthesized. They investigated in terms of their application as catalysts of the reaction of oxidative coupling of methane into synthesis gas. It is found out that the composites containing about 50% (NiO + Ni) and a small amount (up to 5%) of Ce, La, Nd, and Pr-oxides at the temperature 830оС ensure the conversion efficiency of methane within 92 ÷ 95% and the H2/CO ratio 2.0 ÷ 2.1 in the reaction products. The data obtained suggest that the materials manufactured can be effectively used in the systems of syngas manufacturing (for the Fischer – Tropsch process) and in the production of hydrogen from natural gas.
Deposition of a Thin-Film CGO Electrolyte for Solid Oxide Fuel Cells
Authors: Solovyev Andrey A. , Kovalchuk Anastasya N. , Ionov Igor V. , Rabotkin S.V. , Shipilova Anna V. , Terentev Dmitry N.
Published: February 2016

Reducing the operating temperature of solid oxide fuel cells (SOFCs) from 800-1000°C is one of the main SOFC research goals. It can be achieved by lowering the thickness of an electrolyte (ZrO2:Y2O3 (YSZ) is widely used as electrolyte material). On the other hand the problem can be solved by using of another electrolyte material with high ionic conductivity at intermediate temperatures. Therefore the present study deals with magnetron sputtering of ceria gadolinium oxide (CGO), which has a higher conductivity compared to YSZ. The microstructure of CGO layers deposited on porous NiO/YSZ substrates by reactive magnetron sputtering of Ce:Gd cathode is investigated. Current voltage characteristics (CVC) of a fuel cell with NiO/YSZ anode, CGO electrolyte and LSCF/CGO cathode were obtained. It was shown that the power density of a fuel cell with CGO electrolyte weakly depends on the operating temperature in the range of 650-750°C in contradistinction to YSZ electrolyte, and is about 600-650 mW/cm2.
Analysis of Oil Shale Applicability for Gasification Using TGA Results
Authors: Koryashov Ilia A. , Ivanov Alexei , Bukharkin Andrey A. , Martemyanov Sergey M.
Published: February 2016

This article describes the thermogravimetric analysis (TGA) with TGA results obtained for the Russian Respublika Sakha Olenek, Kuznetsk Basin Dmitriyevka and Sergeyevka, and Chinese Jilin province Huadian oil shale deposits in air and argon medium. Industrial applicability of each shale deposit is estimated.
Reliability Model of Fault-Tolerant Dual-Disk Redundant Array
Authors: Rahman P.A. , Muraveva E.A. , Sharipov M.I.
Published: February 2016

This paper deals with data storage systems based on fault-tolerant dual-disk RAID-1, which are widely used as high-reliable data storage systems and have acceptable overhead expenses in hardware implementation. Advanced reliability model of dual-disk RAID-1 array based on Markov chains, which takes into consideration finite time of disk replacement after disk failure, different disk failure rate in array’s normal and rebuild states, and probability of read errors during array rebuild procedure, are also overviewed in this paper. Mathematical solution of reliability model, calculation formula for mean time to data loss, estimation of disk and array reliability parameters and MTTDL calculation example are also provided.
Simulation of Multidimensional Non-Linear Processes Based on the Second Order Fuzzy Controller
Authors: Solovev K.A. , Muravyova E.A. , Soloveva O.I. , Sultanov R.G. , Charikov P.N.
Published: February 2016

Fuzzy controller is a multidimensional nonlinear static link. For the fuzzy controller synthesis it is sufficient to determine its desired static characteristic and adjust it so that it coincides with the desired one. The paper describes the synthesis of a multidimensional nonlinear model using the second order fuzzy controller with the required precision.
Method of Evaluation of Social Network User Sentiments Based on Fuzzy Logic
Authors: Luneva E.E. , Banokin P.I. , Yefremov A.A. , Tiropanis Thanassis
Published: February 2016

The article introduces a method of online social network users’ sentiment evaluation. The advantage of the proposed method consists in its ability to take into account user’s influence as well as the fact that a user could be an author of several messages. Results presented in this paper have been used in the past in mechanical engineering to analyze reviews on products as well as in robotics for developing user communication interfaces. The paper shows the steps of calculation of the sentiment of messages on a certain topic in online social networks. The proposed method is deployed with a view of developing analytic tools and visualizations that make use of more than one such datasets in Web Observatories.
Burning Rate Calculation for a Frozen Nanosized Aluminum Suspension
Authors: Poryazov V.A. , Moiseeva K.M. , Krainov Aleksey Yu.
Published: February 2016

The paper presents a mathematical model for combustion of a frozen nanosized aluminum suspension (ALICE), taking into account the combustion of aluminum in water vapor, the motion of combustion products, and the velocity lag of particles compared to gas. The model was formulated based on Belyaev’s approach to modeling the combustion of volatile fuels [1]. The burning rate calculated is in agreement with the experimental data on the ALICE burning rate and its variation with pressure.
Effective Method for Constructing Pseudo-Random Vectors Uniformly Distributed in Cone
Authors: Reizlin Valery I. , Nefedova Anastasiya A.
Published: February 2016

In this paper we propose an algorithm for efficient production of pseudo-random vectors uniformly distributed in an n-dimensional cone. The method shows higher efficiency compared to the process of elimination in the case of large dimensions. The results of computer experiments confirm the theoretical construct.
Flexible Process Model Design
Authors: Rudometkina M.N. , Chekhonadskikh A.V. , Kakovkin P.A.
Published: February 2016

The paper describes the algebraic logical methods, logical network theory, and information object and process models. The algebraic appliance of finite predicates is used as a mathematical framework. The analysis of the formal description means for information processes allows selecting the logical network appliance for design of complete models of the information process description. This logical network appliance is designed for static object modelling. So, the modification of the logical network model is required for the description of information processes that allowing for the process dynamics. A two-layer logical network is designed comprising the system of binary predicates and predicate operations. The flexible process is presented by a modified logical network allowing to adapt the model to the domain.
Real-Time Recovery of Functions and their Derivatives by Variation Splines
Authors: Kochegurova Elena A. , Gorokhova Ekaterina S.
Published: February 2016

A method of modeling derivatives in a real-time non-stationary process is proposed. This concept is based on approximation of variation smoothing splines. A recurrent estimation formula for parameters of a spline where the number of measurements of every segment is higher than the number of node is given. Dependence between accuracy of estimations of derivatives and values of the spline parameters is studied. Optimal values of parameters are found.
Numerical Study of Combustion Regimes and Heat Radiation of Cylindrical Porous Burner
Authors: Palesskiy F.S.
Published: February 2016

Temperature and radiative characteristics of different regimes of premixed gas combustion in porous cylindrical burner are investigated numerically. Two-temperature thermal diffusion model with radiative heat transfer and external radiative heat losses described in the framework of Eddington model is applied. It is found that two different combustion regimes can be realized under the same mixture equivalence ratio and flow rate depends on ignition conditions. It is shown that total radiative heat flux from the external surface of the burner and burner’s radiative efficiency strongly depend on the combustion regime.
Allocation of Clusters of Objects on Topological Graphs of High Cardinality
Authors: Pogrebnoy Andrey , Pogrebnoy Alexander
Published: February 2016

Distributed systems containing hundreds or thousands of objects, are generally constructed in the form of hierarchical structures. In these structures, the lower level objects in the subset are combined for connecting to centers. Existing algorithms are not able to successfully meet the challenges of structuring on the sets of such dimension. Therefore, new algorithms suitable for solving the problems of structuring on the sets containing thousands of objects are necessary. The authors developed an algorithm to form objects clusters for high cardinality sets, with up to a thousand or more objects located in a given area. The algorithm is developed with the help of graph theory, design and analysis of algorithms efficiency, compact partitions theory, compact sets of objects and their clusters. Geographical location of a set of objects of a distributed system is considered as a topological graph. To improve the efficiency of the algorithm of forming compact sets and clusters allocation the concept of the zone of active search for nearby vertices is introduced. That enables the possibility to replace a matrix of distances between the vertices to list of vertices incidents formed on the basis of active search zone. An algorithm for the approximate solution of clusters allocation of topological graph objects represented by a list of vertices incidents is developed. The algorithm recurrently increases the cardinality of compact sets for each object and analyzes acquired clusters. Algorithm description is accompanied by an example.
Generation of the Dynamic System Control Signal According to Characteristic of the Transient Process
Authors: Ponomareva Anna , Shalaev Yuriy
Published: February 2016

This article is devoted to the usage of the method of representing vectors. The paper contains the basic principles of the method. The article includes the algorithm for generation of the dynamic system control signal according to the method of representing vectors. According to the method, the desired output signal is transformed to a vector and all the intermediate operations are carried out in a digital form; after that the control signal is regenerated according to the conversion formula.
Prostate cancer is not breast cancer
Authors: Venniyoor Ajit
Published: February 2016

Cancers of the prostate and breast are hormone dependent cancers. There is a tendency to equate them and apply same algorithms for treatment. It is pointed out that metastatic prostate cancer with bone-only disease is a potentially fatal condition with a much poorer prognosis than metastatic breast cancer and needs a more aggressive approach.
Diabetes, Epstein-Barr virus and extranodal natural killer/T-cell lymphoma in India: Unravelling the plausible nexus
Authors: Spadigam Anita , Dhupar Anita , Syed Shaheen , Saluja Tajindra
Published: February 2016

The International Diabetes Federation Diabetes Atlas estimates a staggering 590 million people affected with diabetes mellitus (DM) within the next two decades globally, of which Type 2 DM will constitute more than 90%. The associated insulin resistance, hyperinsulinemia, and hyperglycemia pose a further significant risk for developing diverse malignant neoplasms. Diabetes and malignancy are multifactorial heterogeneous diseases. The immune dysfunction secondary to Type 2 diabetes also reactivates latent infections with high morbidity and mortality rates. Epstein-Barr virus (EBV), a ubiquitous human herpes virus-4, is an oncogenic virus; its recrudescence in the immunocompromised condition activates the expression of EBV latency genes, thus immortalizing the infected cell and giving rise to lymphomas and carcinomas. Extranodal natural killer/T-cell lymphoma (ENKTCL), common in South-East Asia and Latin America; is a belligerent type of non-Hodgkin lymphoma (NHL) almost invariably associated with EBV. An analysis of articles sourced from the PubMed database and Google Scholar web resource until February 2014, suggests an increasing incidence of NHL in Asia/India and of ENKTCL in India, over the last few decades. This article reviews the epidemiological evidence linking various neoplasms with Type 2 DM and prognosticates the emergence of ENKTCL as a common lymphoreticular malignancy secondary to Type 2 diabetes, in the Indian population in the next few decades.
Trends in management of acute lymphoblastic leukemia: Influence of insurance based healthcare and treatment compliance on the outcome of adolescents and adults with acute lymphoblastic leukemia
Authors: Arigela Ravi , Gundeti Sadashivudu , Ganta Ranga , Nasaka Srividhya , Linga Vijay , Maddali Lakshmi
Published: February 2016

Aim: In this study, we attempted to analyze the impact of insurance based health care system and treatment compliance on the outcome of adolescent and adults with acute lymphoblastic leukemia (ALL). Materials and Methods: Patients who underwent treatment for ALL during the period 2003-2011 were enrolled into this retrospective study. Patients on supportive or palliative care only and patients with age <10 years were excluded. The hospital records and tumor registry records were studied. Patients were stratified into two groups, Group A (prior to the introduction of state health insurance [SHI], 2003-2007) and Group B (after the introduction of SHI, 2008-2011). Overall survival (OS) was calculated using Kaplan-Meier method. Results: A total of 420 patients with suspected or confirmed ALL visited our center during the study period and 179 patients (87 in Group A and 92 in Group B) were considered for inclusion. The median age in years (range) was 18 (10-57) and 18 (10-58) respectively in Groups A and B with males more than females. Median OS (95% CI) was 9 (6.7-11.2) and 12 (7.3-16.7) months in the Groups A and B respectively (P = 0.265). Poor treatment compliance in both groups was high (36% in Group A and 41% in Group B, [P = 0.107]) with lower default rates in Group B (P = 0.019). Patients with good compliance in the total study population and the individual study groups had significantly better OS. Conclusions: Insurance based health care has improved outcomes in the present study but not compliance to treatment. Significantly better OS was observed in patients with good compliance.
Landmark Trust: 50 años rescatando edificios históricos
Authors: Stanford Caroline
Published: February 2016

El Landmark Trust es una organización benéfica del Reino Unido especializada en el rescate de edificios históricos en riesgo y en su restauración a los más altos estándares. Posteriormente, estos edificios son cedidos en alquiler vacacional para pagar los costes de su futuro mantenimiento. Fundada en 1965, el Trust gestiona una cartera de 200 edificios históricos en Inglaterra, Escocia y Gales, junto con unos pocos también en Francia, Italia y Bélgica. La mayoría de estos edificios no habría sobrevivido sin su ayuda. Este artículo explica el proceso de fundación del Trust y analiza su evolución hasta la actualidad.
Pressupostos da Teoria Histórico-Cultural para a apropriação da cultura escrita pela criança
Authors: Amaral Mello Suely , De Freitas Bissoli Michelle
Published: February 2016

Este artigo tem como objetivo trazer à discussão alguns pressupostos da Teoria Histórico-Cultural para a reflexão e para a prática de professores e professoras cujo trabalho se voltapara a aproximação entre as crianças da Educação Infantil e anos iniciais do Ensino Fundamental e a cultura escrita. Partindo de pesquisas realizadas por Vigotski e Luria,para quem a linguagem escrita é um instrumento cultural complexo que se desenvolve, naontogênese, a partir do gesto, do brincar e do desenho, busca-se refletir sobre problemasque têm envolvido as práticas escolares que, a despeito dos esforços que exigem das crianças, não têm contribuído para a formação da sua capacidade de ler e produzir textos. Sendo assim, é apresentado o trabalho de enriquecimento das vivências infantis e das diferentes formas de expressão como possibilidades de um trabalho pedagógico capaz de contribuir para o desenvolvimento da criança.
Professora alfabetizadora: um ofício e muitos fazeres
Authors: Castro de Araujo Liane , De Andrade Arapiraca Mary , Sobral Muniz Dinéa Maria
Published: February 2016

Neste artigo discute-se o ofício da professora alfabetizadora de crianças – assumindo o gênero feminino nele predominante – como aquele que envolve um saber-fazer relacionado a saberes diversos, vinculados às diferentes facetas do objeto de conhecimento: a língua escrita. Nesse ofício, importa considerar tanto as concepções de linguagem, de ensino e aprendizagem, quanto a dimensão sociocultural mais ampla do trânsito no universo da literatura, da tradição oral, da cultura lúdica infantil e dos diversos gêneros discursivos envolvidos nas práticas de leitura e escrita – aspectos fundamentais no âmbito de uma concepção de alfabetização em contexto de letramento, de múltiplos letramentos. Finalmente, articula-se esse ofício de muitos fazeres e saberes a uma formação docente crítica e reflexiva, que assegure às alfabetizadoras a autonomia e a autoria no seu saber e saber-fazer.
Oralidade e Memória: a função das narrativas na educação
Authors: Rocha Ferreira Lucia
Published: February 2016

Este artigo analisa a relação entre história e narrativa, investigando suas relações recíprocas. Há um sentido comum entre ambas, pois é possível circunscrever a narrativa como história e a história como narrativa. O caráter notadamente formativo da narrativa é dado por sua intenção simultaneamente lúdica e educativa. Com esse intuito, esta investigação desdobra-se nos seguintes aspectos: origem e função da narrativa; o elemento mítico; o aspecto da oralidade; o prazer da narrativa na relação entre o narrador e o ouvinte. Dessa forma, tem-se a sua relação com a educação, compreendida no sentido amplo de formação. Nesse plano, o sentido aqui analisado de história será aquele que se instaura como arte de narrar. Para tanto, do ponto de vista metodológico, serão analisadas passagens dos poemas de Homero e Hesíodo, buscando identificar os elos que unem a poesia à narrativa. Eles colocam em cena, entre suas personagens, aspectos fundamentais da arte de narrar, que entrelaçam memória e saber, revelando o aspecto técnico da imagem poética, ou seja, a construção da linguagem da narrativa. Desse modo, será possível mostrar como, já no universo da cultura clássica, oralidade e memória vinculam-se de modo essencial e inscrevem uma perspectiva formativa como arte de narrar e de ouvir.
Prática docente no Ensino Superior: a formação pedagógica como mobilizadora de mudança
Authors: Dos Santos Junges Kelen , Behrens Marilda Aparecida
Published: February 2016

Entende-se que a formação pedagógica permite ao professor universitário a olhar para sua prática pedagógica, interpretá-la e recriá-la, tornando-a também uma fonte de aprendizagem numa perspectiva de mudança e de inovação. Para tanto, optou-se neste texto apresentar uma das questões que compuseram uma pesquisa de tese e tem como objetivo analisar a formação pedagógica como mobilizadora de mudança da prática docente no ensino superior. A pesquisa adotou como metodologia a pesquisa-ação em um programa de formação pedagógica com professores universitários de uma instituição de ensino superior pública municipal, denominado de Grupo Docência em Reflexão (GDR). Como instrumento de coleta de dados foi utilizado uma entrevista semiestruturada com dez dos professores participantes do processo formativo. A categorização dos dados coletados revelou que as mudanças na prática pedagógica dos professores entrevistados, a partir das atividades do GDR, incidiram, especialmente, na percepção do que é ser professor universitário, no relacionamento com os alunos, na organização didática das aulas, na avaliação do processo de ensino e aprendizagem, na reflexão sobre a prática e nas dificuldades encontradas por eles ao implementar uma mudança em sua prática pedagógica. Assim, considerou-se que uma proposta de formação pedagógica orientada e partilhada dos professores universitários, baseada em ações concretas e inserida numa perspectiva reflexiva, além de uma aprendizagem docente mais profunda e duradoura, mobiliza mudanças na prática pedagógica desses professores, incitando uma prática inovadora.
Estudantes indígenas em uma escola não indígena: possibilidades para vivências interculturais
Authors: Bergamaschi Maria Aparecida , Müller Dickel Kátia Simone
Published: February 2016

Este artigo decorre da pesquisa em uma escola indígena e em uma escola não indígena, realizada basicamente na perspectiva metodológica etnográfica, durante os anos de 2011 e 2012. Na escola não indígena foi observada a convivência com estudantes Kaingang que concluem o ensino fundamental, iniciado na escola da aldeia. A partir disso, foram descritas situações que mostram a educação e a escola no cotidiano Kaingang, bem como o cotidiano da escola não indígena, como ocorre a convivência e as possibilidades para a interculturalidade, as conflitualidades e as relações de reciprocidade. O olhar dedicado para conhecer e descrever essa relação abre um campo de possibilidades decorrentes de trocas – às vezes desconfianças e isolamentos –, que oferecem contribuições importantes, tanto para a educação e a escola indígena quanto para a educação e a escola não indígena.
Tertúlia literária: construindo caminhos para a formação literária de professores alfabetizadores na universidade
Authors: Abicalil Belmiro Celia , Versiani Machado Maria Zélia , Correia Baptista Mônica
Published: February 2016

Este artigo apresenta reflexões sobre a formação literária de professores de escolas públicas que atuam na educação infantil e nos anos iniciais do ensino fundamental, na condição de participantes de um projeto de extensão da Universidade Federal de Minas Gerais. Iniciado no ano de 2009, o projeto Tertúlia Literária: quem lê também tem muito a dizer concebe a prática da leitura como uma atividade propícia ao estabelecimento de relações intersubjetivas, e, para que isso ocorra, promove encontros mensais com o objetivo de socialização de leituras realizadas a cada mês por professores e mediadores convidados. Em seis anos ininterruptos de encontros e atividades diversas, mantém-se a finalidade de destacar a literatura como uma das leituras que devem fazer parte da vida e, consequentemente, da trajetória de formação dos professores. A experiência acumulada reúne elementos sobre a leitura literária no contexto do Projeto, que busca romper com modelos de formação que dificultam e até mesmo afastam o almejado encontro dos leitores com os livros de literatura. Este texto se propõe a discutir e problematizar aspectos relativos à leitura literária que o Projeto tem revelado, em contexto de formação na Universidade.
Editorial
Authors: Brown Alison
Published: February 2016

.
Symbolic politics, legalism and implementation: the case of street vendors in India
Authors: Amis Philip
Published: February 2016

This paper is concerned with attempts to manage street vendors in India. Firstly it traces the evolution of attempts at management, through guidelines introduced in 2002, to the 2014 Act which is legally enforceable. The act has not yet been implemented but the State of Madhya Pradesh has implemented its own act which is almost identical. This has been successfully implemented at an administrative level but on the ground nothing has changed. It is suggested that this reflects the importance of symbolic politics and problems of implementation.
The ‘silent pistol’ in Ghana’s local government system: presiding members vs. chief executives
Authors: Musah-Surugu Issah Justice , Yeboah-Assiamah Emmanuel
Published: February 2016

Decentralisation and local governance aim at local economic development, but collaboration among key actors at the local level is essential in realising this objective. However, at district assembly level Ghana exhibits problematic conflicts between district chief executives (DCEs), who head the executive committee, and presiding members (PMs) who convene and preside over assembly deliberations, acting as speaker. This study aims to unpack the main causes of such unsavoury conflicts by using 13 case studies from the Ashanti Region. Both primary and secondary data were collected for the study. Primary data was gathered from a selection of 40 key informants drawn from three main groups including DCEs, PMs, and other stakeholders such as regional coordinating council members, assembly members and chiefs. The main research instrument was one-on-one in-depth interviews with participants. The study found deep-seated conflicts between DCEs and PMs, in some cases even transcending these two actors to involve a greater section of actors within the local government administration. The study noted that professional bureaucrats within the local government service are affected when allegations of affiliation are levelled against them. The study also found that the legal status of DCEs and PMs appears to be the main driver of potential conflict, although other context-specific issues were also prevalent.