bluuebunny/crossref_metadata_2025 huggingface dataset:
Implementation of Naïve Bayes updateable with modified absolute discount smoothing on Pamekasan Regent SMS center data classification
Authors: Said B , Dewi N P
Published: November 2019

Classification is a grouping process based on a predetermined class. Previous research has classified Regent Pamekasan SMS Center using Naïve Bayes and Modified Absolute Discounting (MAD) Smoothing, but the average classification accuracy is still equal to 76.83%. to improve the accuracy of classification then in this study applied Naïve Bayes Updateable by using MAD Smoothing. The classes used remain 15 classes: Education, Health, Infrastructure, Crime, Administrative Services, Sports, Government, Agriculture, Small and Medium Enterprises, Order, Weak Economy, Religion, Art and Culture, Natural Disasters, and Others. Before doing the classification process first done pre-processing such as equating characters, deletion of punctuation, restore abbreviation, translation of the local language (Madura), deletion of numbers, deletion of words that are not important in SMS, and stemming to convert into a basic word. Results Some experiments obtained an average accuracy of 78.89%, with the accuracy of one test reached 87.65%. And Naïve Bayes Updateable can increase accuracy by 2.07% with the addition of 0.47-minute classification time.
The role of electronic learning media in creativity learning
Authors: Hikmawan T , Sutarni N , Hufad A
Published: November 2019

Information technology at this time is the latest dimension that cannot be separated from human life. The field of education is the thing that gets the influence of information technology. Currently, the teaching and learning process not only rely on physical books and whiteboards, but with the help of electronic-based learning media. Electronic learning media is the latest breakthrough from the influence of information technology progress. The new facilities help actors in the world of education to improve the quality and quality of education to be more advanced and developed in the digital era of today. Improving the quality of education through intermediaries of electronic learning media can trigger the pattern of creativity in the actors of the world of education.
Inheritance process of West Java local-arts values based on multimedia communications
Authors: Wartika E , Ridwan I , Apip A
Published: November 2019

West Java is one of the provinces in Indonesia with a very vast culture and art heritage. Now, the local arts and cultures have been diminishing with times. This problem was caused mainly by the declining appreciation and the lack of attention from present generations. However, the communication media and technology can play important roles to promote them. This paper aims at examining how multimedia communication models can optimize the process of inheritance and preserve art and culture. The model was developed in such a way, so that the inheritance processes of arts culture can be adaptive with modern society that is characterized by the use of computer networks and applications. The method used in this research is qualitative, and the final results is a collection of West Java local arts documentary videos that are mapped with their associated Geographic Information System, namely “Geographical Mapping of Sundanese Art”. The communication pattern is adjusted without damaging the content and essence of the cultural arts that are processed. This model will become an effective way to disseminate the local arts, so that the community can have easier access to the documentary video of local culture, especially in West Java region.
Implementation weighted product method to determine multiple intelligence child
Authors: Ahsan M , Indawati N
Published: November 2019

Multiple Intelligence can be known through words, numbers, music, pictures, physical activity or motor skills in a social-emotional way. Multiple Intelligence is basically the development of brain intelligence (IQ), emotional intelligence (EQ), and spiritual intelligence (SQ). Intelligence is the ability possessed by a person to see a problem, then solve the problem or make something that can be useful for others. Intelligence or intelligence can be viewed as the ability to understand the world, think rationally, and use resources effectively when faced with a challenge. Some argue that the notion of intelligence is the general human ability to perform actions that have goals and think in a rational way. In addition, intelligence can also be interpreted as a personal ability to understand, innovate, and provide solutions to various situations. Multi Attribute Decision Making (MADM) is used in making decision support systems using Weighted Product (WP) to define child Multiple Intelligence. 8 intelligences with 8 criteria with specified weights. The data tested based on the data of new students who have enrolled in SMP Negeri 3 Kepanjen with the amount of data 226 students who have registered and fill in the questionnaire (indicator) that has been provided through www.teskecerdasan.com. The results of these are graphs that have been ranked based on the Weighted Product (WP) method villages.
Bi-conditional Cordial Labeling for Extended Duplicate Graph of Certain Classes of Graphs
Authors: Nandagopal E. , Maheswari V.
Published: November 2019

In this article we admit Bi- Conditional for Duplicate graph of Quadrilateral Snake EDG(QSm
)m ≥ 2, Double Quadrilateral SnakeGraphs EDG(DQSm
)m ≥ 2, and Triangular ladder graph. EDG(TQLm
)m ≥ 2.
Existence and uniqueness of solutions for boundary value problem of fractional order difference equations
Authors: George Maria Selvam A. , Abraham Vianny D.
Published: November 2019

In this article, we investigate the existence and uniqueness of solutions for boundary value problem (BVP) of fractional order difference equations (FODE) of the form

Δ
υ

w
(
s
)
=
−
f
(
s
+
υ
−
1
,
w
(
s
+
υ
−
1
)
)

,

w
(
υ
−
2
)
=
ψ
(
w
)
,
w
(
υ
+
k
)
=
ϕ
(
w
)

,

where s ∈ [0, k]
N
0
, f : [υ − 2, υ − 1, …, υ + k]
N

υ−2
× R [0, + ∞] is a continuous function ψ, φ : C ([υ − 2, υ + k]
N

υ−2
) → R are given functions and

1
<
υ
⩽
2

. Existence and uniqueness of solutions are established by the Brouwer fixed point theorem and contraction mapping principle.
Bi-Magic Labelings of Some Connected and Disconnected Graphs
Authors: Subbulakshmi Dr.S. , Kokila R.
Published: November 2019

Various graph labeling that generalize the idea of a magic square have been discussed. In particular, a magic labeling on a graph with v vertices and e edges will be defined as a one to one map taking the vertices and edges onto integers 1, 2,…, v+e with the property that the sum of the label on an edge and the labels of its end points is constant, independent of the choice of edge.
Exponentially varying suction and injection on MHD viscous oscillatory stratified flow between parallel porous plates
Authors: Prasanna Venkatesh L. , Manoharan R.
Published: November 2019

Start your abstract hereIn this paper we consider Magenetohydrodynamic viscous oscillatory flow of incompressible linearly density stratified fluid in a long vertical rectangular channel with injection through y – axis and suction through the plate parallel to y - axis. In the undisturbed state the density distribution is assumed to be linearly distributed. Closed form solutions are obtained using similarity transformation. The effects on axial and transverse velocity profiles due to various parameters involved in the problem are illustrated in the figures. The graphical representations of the investigation show that the stratification effects are more on transverse velocity profiles than that of axial velocity. For constant density and zero electromagnetic induction the result reduces to that of viscous oscillatory flow between parallel plates
Impact of Heat Transfer and Viscous Dissipation on Unsteady MHD oscillatory Dusty Fluid Flow Through a Vertical Porous Channel
Authors: Vijayalakshmi R. , Govindarajan A.
Published: November 2019

This work discusses the effect of heat transfer and viscous dissipation on unsteady MHD (Magneto Hydro Dynamic or Hydromagnetic) oscillatory dusty fluid flow through a vertical porous channel. The governing equations for both fluid and particle phase are solved separately to get the exact solution for velocity and temperature profiles. The effect of various dimensionless parameters are displayed graphically and discussed qualitatively.
Application of Cubic Transition Matrices and Product Fuzzy Soft Transitionmatrices
Authors: Shyamsundar G.
Published: November 2019

In this chapter an application of cubic transition matrix in agricultural planning is provided. This chapter is concluded with a decision theory on product fuzzy soft matrices.
Some Subclasses of Analytic Functions With Respect to (j, k)-Symmetrical Points
Authors: Ramachandran K. , Vanaja R. , Ramamoorthy K.
Published: November 2019

In this paper, the author introduces a new subclasses of analytic functions with respect to (j, k)-symmetric points and investigate various inclusion properties for these classes.Integral representation for functions in these classes and some interesting applications.
Fuzzysequencing problemwith uncertain processing time
Authors: Leelavathy T. , Kowsalya M.
Published: November 2019

In this paper, we suggested a new approach to obtained an optimal sequence “for fuzzy sequencing problem with trapezoidal fuzzy number.” Using new fuzzy arithmetic operation and ranking method, an improved algorithm is proposed to obtain the fuzzy total elapsed time for processing all the jobs without converting problem into classical form. The approach is efficiently illustrated with a numerical example.
Assessment and mapping of transport load in the central ecological zone of the Baikal natural territory to ensure tourism and recreational activities
Authors: Dashpilov Ts B
Published: November 2019

Without a stable working transport infrastructure, intensive development of tourism and recreational activities is impossible; therefore, it is necessary to assess the possibilities of transport on the territory of the Central Ecological Zone of the Baikal Natural Territory (CEZ BNT). For this purpose, the author has analyzed the transport infrastructure in CEZ BNT within the boundaries of the districts of the Irkutsk Region. The author has studied in detail the main types of the transport system, their geographical location as well as infrastructure facilities of transport in the territory of CEZ BNT. Moreover, the author has assessed the functioning of transport in this area to ensure the development of tourism and recreational activities. The author has also analyzed the volume of transported passengers in the regular passenger routes and the number of transported passengers and vehicles on ferry crossings. The analysis of transport has identified some problems, the solution of which is necessary for better service to the population and the economy. In this regard, the author has proposed some recommendations for solving problems as well as scenarios for the optimal development of transport in the territory of CEZ BNT. For a more holistic analysis of the territory, geoinformational mapping of transport areas of the Irkutsk Region included in CEZ BNT has been performed, which shows the main types of transport (railways, highways and waterways), temporary accessibility to the regional center and main infrastructure facilities (gas stations, ports, wharves, airports, runways, and helipads).
Analysis of lightning discharges activity within the territory of Buryatia in 2010-2016 based on WWLLN data
Authors: Yu Karanina S , Karanin A V , Baranovsky N V , Kocheeva N A , Yu Belikova M
Published: November 2019

Thunderstorm activity is the main natural cause of forest fires. The development of new or modernization of existing systems for monitoring and forest fires forecasting requires the involvement of data on the spatial and temporal distribution of thunderstorms in monitorable forest areas. This article discusses the territory of the Republic of Buryatia (Russian Federation). The study of the spatial and temporal components of thunderstorm activity was carried out based on the World Wide Lightning Location Network (WWLLN) data. WWLLN data on thunderstorms locations for 2010-2016 were used. The network registers lightning discharges during the year. The thunderstorm season lasts from May to September. Archival WWLLN data for this period were selected. The resulting dataset allowed us to distinguish areas with different lightning activity. A high degree of spatial nonuniformity of thunderstorm activity in Buryatia was established. The number of lightning discharges begins to increase in May, the maximum is observed in July, and a recession occurs in August. Two daily maximum were revealed: the first maximum of number of lightning discharges is in the interval from 12 to o’clock and the second is about 19 o’clock of local time.
The features of landscape mapping in the environmental assessment
Authors: Konovalova T I , Plyusnin V M
Published: November 2019

Along with the General scientific methodology of mapping of geosystems, special cartographic models are developed for practical purposes, which take into account the needs of the industry for which they are created. The article deals with the main methods of mapping to solve the problems of environmental impact assessment of objects Verkhnechonskoye oil and gas condensate field and the system of external transport of oil. Due to the specifics of the Northern territory in the legend of the map reflects the geological and permafrost characteristics of each landscape, as well as the main processes taking place in them. Analysis of the set of factors displayed for each landscape made it possible to divide the latter into three degrees of stability (the ability to restore its original appearance after external influence). For convenience of perception of the cartographic image, each area is shown in the color scale with separate numbering of contours. Colors within each district differentiate according to certain basic typology landscape on different landforms, which alter hydroclimatic conditions. The article gives examples of legend maps and explanations to assess the transformation of landscapes in natural and anthropogenic conditions. The modern transformation of landscapes and the forecast of their changes are based on a detailed assessment of natural conditions, their dynamic and evolutionary transformations, ecology of plant species, and the nature of anthropogenic impact.
The influences of climate on runoff: a case study of four catchments in Western Siberia
Authors: Kopysov S G , Erofeev A A
Published: November 2019

Currently, dynamic processes, affecting runoff in catchments, are poorly understood. Among all the elements of water balance calculations, the streamflow is the most accurately measured and largely reflects the current moisture content of the active layer. Devices for automatic measurement of water level and temperature of soil, water and air were installed in four small catchments with different climatic conditions. The studied catchments are located in a zone of oligotrophic swamps of the southern taiga, a zone of hilly swamps of the forest-tundra, a foothill zone of the southern taiga, and a mountain-glacial basin. Runoff in the mountain-glacier basin is determined using an acoustic level meter of the water flow. As a result: Site 1) We have revealed a change in the water-physical properties of the active layer in the marshy catchment, which resulted from the 2012 drought; Site 2) We have shown the linkages of the moisture content of the soil above the water table with extreme water discharge in active watersheds; Site 3) The increase in autumn runoff is due to thawing of seasonal permafrost and snow-melt in the tundra; Site 4) In the mountain-glacier basin, our studies are at an initial stage.
Landscape-hydrologic systems and erosion processes across the middle Ob region
Authors: Korkin S E , Isypov V A , Korkina E A
Published: November 2019

The present paper considers landscape and hydrological systems and erosion processes in the middle Ob territory. In the monograph by A.N. Antipov and V.N. Fedotov [1], the middle Ob territory belongs to Ob-and-Irtysh forest-boggy, lowland accumulative landscape hydrological system of Western Siberia. In recent years, many significant events of natural character within the middle Ob territory (high level of floodwater in 2002, 2007 and 2015 and unusually warm and low water summer in 2003, 2012 and 2016) bring into focus the role of climatic changes. Variations of meteorological parameters provoke spikes in the development of the leading class of factors related to the complex of natural processes. A map of the key sector of the studied region is drawn to spatially visualize the structure of valley landscapes of the middle Ob region. Erosion processes are observed at the initiative station called “Ust-Vakhsky”. Within the sector of the station, the maximum bank recession rate measured by Tymen complex geological survey expedition in 1988 is 25 m/year, and the long-term average is 5.26 m/year (1983-1994). Long-term average annual bank recession rate by monitored cross section over 2002 - 2018 is 2.9 m/year. The maximum bank recession rate measured in 2004 is 17.5 m/year at the fifth cross section.
Landscape and mapping support of regional geoecological analysis
Authors: Kuznetsova T I , Lopatkin D A
Published: November 2019

The aim of the study was to develop a methodology for geographic synthesis of knowledge based on the polygeosystem concept and the idea of interpretative landscape-ecological mapping using GIS technologies, ranging from the study of general principles and logic of research to solving specific problems of geographic information mapping. The mapping strategy is to display the natural landscape as a complex of human living conditions in comparison with anthropogenic impact and possible consequences. The methodology for creating an outfit of landscape maps represents a combination of traditional mapping methods and geo-information methods for organizing thematic spatial data and their modification using GIS technologies. The basic principle of the creation of the cartographic information system (CIS) is the principle of complexity, which presupposes the existence of a system of landscape classification that is uniform for all thematic electronic layers of the CIS, and which can combine their natural and anthropogenic components. Such an approach provides a means of presenting a series of conjugated landscape-ecological interpretation maps of the Baikal region in the form of a holistic CIS consisting of an outfit of thematic layers, united by a common concept and created on a single landscape basis.
Ecological and economic balance modeling for regional multifunctional sustainable forest management
Authors: Makar S V
Published: November 2019

Balance as a principle of long-term sustainable development is considered in the context of forest management results in Russian regions (forest industry production) in comparison with results of carbon storage of forest ecosystems. These results reflect two main functions of forest potential: socio-economic (consumer) and socio-natural (carbon depositing). Considering various quantitative and qualitative aspects of their relevance, the latter should be recognized as an emphasis. Five concepts characterize effects of forests ecosystem function. To determine the value of carbon stocks used, two variants of income function in the regional ecological and economic system are considered. The models were approved using regions typology adapted for state forest management purposes according to the criteria of forest cover and development. In each group, representing a separate type of regions (multi-forest, medium-forest, low-forest and underdeveloped), new spatial configurations were formed, which indicated fundamental differences in carbon cost by Russian regions. Calculations make it possible to justify charges introduction for carbon stocks consumption in the region and differentiation of fee rates. Modelling allows to substantiate imperative of compliance with ecological and economic balance between deforestation (timber harvesting) and carbon storage. The study results provide a basis for differentiated state policy of forest management based on regional characteristics.
An assessment of environmental flow for modelling the operating conditions of Mongolian hydropower plants in the transboundary basin of the Selenga River
Authors: Nikitin V M , Abasov N V , Osipchuk E N , Berezhnykh T V
Published: November 2019

The decision of Mongolia’s Government to implement the projects for the construction of hydropower plants (HPPs) in the transboundary basin of the Selenga River caused the need to study their possible impact on the Russian part of the basin and Lake Baikal. To assess the impact of planned in Mongolia HPPs on the territory of the Russian Federation (water resources and ecosystem), we have studied the expected changes in the yearly hydrological regimes due to flow regulation. A methodology developed at the Melentiev Energy Systems Institute (MESI) allows integrating various models (hydrological, energy, environmental, etc.) into a single system. We have employed this system to model the parameters of the planned HPPs reservoirs and their regulation modes, as well as the deviations of hydrological regimes of Selenga River due to the HPPs construction from those under natural conditions. The concept of “environmental flow” is used to assess changes in the intra-annual hydrological regime of a river. We determine the boundaries of the environmental flow for each month based on an analysis of a variety of biotic and abiotic restrictions for the entire river bed from the border of the Russian Federation to the Selenga River delta.
Environmental studies and support economic activities in regions the Western-Siberian north
Authors: Popova N B , Ryapolova N L
Published: November 2019

Economic activity in any territory involves compliance with certain environmental parameters. The specialization of economic activity of the West Siberian North is not environmentally safe, as it is mainly associated with oil production. The ecological justification of the impact of activities on the surrounding area is an urgent scientific and practical objective of time. Climatic conditions form ecological stability of natural ecosystems to anthropogenic loads. The numerical values of the elements of heat and moisture turnover are necessary to assess the natural potential of territory. They are parameters required for the analysis and assessment in the environmental regulation of economic activity. The maximum permissible technogenic load, which reflects the degree of impact of activity on natural landscapes, is important. On the basis of the calculated characteristics of heat and moisture supply, the energy equivalents of the maximum permissible technogenic load of the surface layer of air, surface waters and phytocenoses of the studied region are determined. On the basis of the calculations and analysis their latitudinal distribution from South to North in the studied territory is revealed. The results can serve as a basis for environmental regulation of economic activity in order to evaluate the modern and long-term environmental sustainability.
Water-resource substantiation of strategic planning in the regions of the Ob-Irtysh basin
Authors: Rybkina I D
Published: November 2019

The paper substantiates the need to conduct water assessment for the strategic planning documents of the regions, including the elaboration of strategies and the forecasts of long-term socio-economic development of the Russian Federation. In this regard, we present the theoretical and methodological approach and the algorithm of such assessments. The approach is based on the landscape-basin principle of territory organization. On the example of the Ob-Irtysh basin regions, the assessing has revealed water availability in the territories, anthropogenic load, water intensity, water consumption forecast, and prospects for water resources use. They indicate local water shortage in some landscape provinces of Omsk Oblast with a total population of more than 130 thousand people. Within the boundaries of river basins, we have estimated the anthropogenic load of low and medium intensity and calculated water intensity of territories (municipal districts), including for different types of economic activity and yearly dynamics. These results have been also a basis for forecasting the prospective use of water resources for drinking, industrial, irrigation and agricultural purposes. Using the forecasts, we have developed scenarios of the water supply of the regions, considering water content (minimum, maximum and average) of the period.
Tree-ring reconstruction of the level of endorheic lakes in the south of West Siberia
Authors: Rygalova N V , Galakhov V P
Published: November 2019

The paper presents the dendrochronological method applied in reconstructing the changes in the water level of endorheic lakes from arid areas (on the example of two large endorheic lakes Kulundinskoye and Chany). Chronologies of annual ring width of Scots pine (Pinus sylvestris L.), growing in the pine belt forests in the south of West Siberia, were used as indicators of climate change. To obtain the longest reconstructions, we used the lengthen chronologies. For analysis, specimens of living trees and old wooden houses in the Altai Krai villages (adjacent to pine-belt forests) were used. Due to the dendrohydrological analysis, we have determined the relationship between the lake level and the radial pine growth. We have revealed a one-two-year lag in the response of hydrological objects to climate fluctuations. Correlation between the tree-ring chronologies and the average annual water level of Lake Kulundinskoye occurred more often due to proximity of both geosystems, i.e. the lake and pine-belt forests. At the same time, there was the best correlation for Lake Chany and the drysteppe chronology Uglovskoye 42_LL. In the course of investigations, we have extended the series for lakes Chany and Kulundinskoye up to 1584 and 1763, respectively. Spectral analysis of the series of the water level in both lakes allowed us to identify common cycles (i.e. 25-26, 40-46 and 80-100-year ones). For Lake Kulundinskoye, the 8 and 11-year cycles turned out to be the most significant. The analysis of secular cycles of hydrological series enabled to specify the trends in water-level changes of the studied lakes in the future.
Sino-Russian Oil Security: Evolution and Structure
Authors: Yang Y , Dong S , Li F , Cheng H , Boldanov T , Liu Q , Li Z , Li Y
Published: November 2019

Sino-Russian oil cooperation is of great significance to Sino-Russian oil security. This research evaluates the evolution pattern of China’s external oil supply risk and Russia’s export risk in 2005-2016 and the impact of Sino-Russian oil cooperation on Sino-Russian oil security. It was obtained: The concentration degree of China’s oil import is gradually decreasing, Russia plays an important role in balancing China’s external oil supply and reducing its concentration. When bringing in oil export potential (OEP), China’s external oil supply risk shows the trend of wavy increase, and the continued declining OEP of Russia increases the risk in a certain degree. When bringing in oil price (OP), China’s external oil risk shows an M-style decrease, and the sanction against Russia by western countries led to cliff drop of OP, which led to sharp fall of risk in the short term. The concentration degree of Russia’s oil export shows a wavy increase. The increasingly important role of China in the Russian oil export market (OEM)exacerbates the concentration degree. When bringing in oil import potential (OIP), Russia’s oil export risk shows an M-style increase, and the positive effect of China’s exuberant OIP has largely counterbalanced the negative effect of the continued declining OIP of other major Russian oil export markets. When bringing in OP, Russia’s oil export risk shows an M-style increase, especially under the sharp fall of OP in recent years, the risk increases dramatically.
Investigation of the optimal modes of electron-beam wire deposition
Authors: Dragunov V K , Goryachkina M V , Gudenko A V , Sliva A P , Shcherbakov A V
Published: November 2019

The paper is devoted to the definition of the minimum electron beam power that is required to obtain stable layer formations during the additive electron beam wire deposition. Correlation between the minimum energy that is needed for stable deposition and the deposition speed has been established. Additionally, the influence of the electron beam oscillation type on geometrical parameters of single layers have been investigated.
Structure and mechanical properties of 09Mn2Si steel surfaced layers and welds modified by adding titanium carbonitride nanoparticles
Authors: Galchenko N K , Samartsev V P , Kolesnikova K A , Vlasov I V , Panin S V , Yakovlev A V
Published: November 2019

The study on structure and mechanical properties of surfaced coatings and welded joints of 09Mn2Si steel formed with the use of a standard electrode as well as one modified by adding titanium carbonitride nanoparticles was carried out. Optical and scanning electron microscopy, microhardness measurement were employed to investigate the structure at welding with a standard electrode, as well as to illustrate changes resulting from the electrode modification through adding titanium carbonitride nanoparticles. Evaluation of mechanical properties was performed by conducting tests on static, cyclic and impact loading. It is shown that welding with the use of the modified electrode gives rise to decreasing the size of ferrite grains and increasing impact toughness and fatigue life.
Digital visualization of thermal processes accompanying welding of small-diameter pipes
Authors: Krektuleva R A , Perovskaya M V , Saraev Y N , Semenchuk V M , Cherepanov R O , Bezginov R O
Published: November 2019

The work investigates the specificity of the thermal processes occurring during formation of a molten pool in curvilinear specimens. The process is exemplified by welding of small-diameter pipes. A numerical 3D-model of the interaction of a moving heating source and thick-walled pipes of various curvature was built. The material, diameter and thickness of pipes were selected as per active standards. The numerical calculations were performed. The practical experiment was performed using argon tungsten-arc welding. The results establish the effect of the welded part geometry on the dynamics of thermal processes in the molten pool.
Analytical characteristics of the electron beam distribution density over the heated spot for optimizing the electron-beam welding process
Authors: Kurashkin S O , Laptenok V D , Murygin A V , Seregin Yu N
Published: November 2019

The control of the electron beam energy distribution density over the heated spot, realized by using different scanning trajectories, can significantly improve the quality of welded joints. Experimental research by the authors showed that the best quality of welded joints is provided by scanning the electron beam in the form of a raster. Therefore, to optimize the process of electron-beam welding, trajectories of the classical raster, sinusoidal raster and truncated raster were proposed, and by increasing the scanning amplitude along the joint, the vapour-gas channel of penetration transforms into a stable cavity, on the front wall of which the metal melts, with it then being transferred along the side walls to the tail end of the weld pool. It is advisable to investigate the effect of the formation of the penetration cavity in the EBW of various materials and different thicknesses. For this, an apparatus must be created that implements scanning in the form of various rasters. For optimizing the process of electron-beam welding, the trajectories of the classic sawtooth raster, sinusoidal raster and truncated raster are proposed. For these scanning trajectories, analytical expressions and calculated characteristics of the electron beam energy distribution density are obtained over the heated spot. The trajectory in the form of a sinusoid and a truncated raster makes it possible to obtain double-humped energy distribution over the heated spot. The obtained characteristics facilitate the optimization process of electron-beam welding of different materials.
Laser welding of aluminium alloys for the aircraft industry
Authors: Malikov A , Orishich A , Karpov E , Vitoshkin I
Published: November 2019

The results of laser welding of an Al-Mg-Mn and two Al-Mg-Li alloys with different lithium contents which used in the aircraft industry are presented in this paper. Microstructure, phase composition and mechanical properties of the welds were investigated. A fundamental difference in the processes of formation of structural-phase compositions in the weld metal of these alloys was found.
Analysis and simulation of kinetics of elasto-plastic weld failure in structures at cryogenic temperatures
Authors: Makhutov N A , Makarenko I V , Makarenko L V
Published: November 2019

The article presents the results of solving one of the fundamental problems in the field of increasing strength, service life, survivability, reliability and safety of welded joints in critical structures. A model for simulation of elasto-plastic welds failure in steel structures at cryogenic temperatures was developed. It proposed clarifying calculation and experimental methods for analysis and simulation of failure mechanisms taking into account types of forming defects. In addition, effect of heating and cooling cycles, kinetics of elasto-plastic deformation as well as fields of residual stresses and strains were used to predict the results.
Laser welding of thin metal filaments from titanium nickelide
Authors: Potekaev A I , Gunter S V , Ibragimov E A , Klopotov A A , Galsanov S V
Published: November 2019

The paper presents the results of a study of welded joints of thin filaments from the TiNi(MoFe) alloy. Welding was carried out in order to produce compounds from thin filaments used in medicine as a suture material and for manufacture of metal fabrics. The experiments have shown the perspectivity of using pulsed laser welding for producing welded joints of thin filaments. Formation features of the welding pool as a result of the interaction of a laser beam with a composite material, which are thin filaments from the TiNi (MoFe) alloy, have been revealed using scanning electron microscopy.
EBSD analysis of the structure of a weld joining a chromium-nickel steel sheet and a titanium alloy sheet through a copper insert
Authors: Pugacheva N B , Michurov N S , Senaeva E I
Published: November 2019

The structure of the different zones of a C02 laser welded joint between a chromium-nickel steel sheet and a titanium alloy sheet, with a copper insert between them, is studied by EBSD analysis. The phase compositions of all the zones have been determined. The weld material has been found to consist of a Cu-based solid solution and unevenly distributed intermetallic particles of different stoichiometric compositions. The heat-affected zones consist of supersaturated iron- and titanium-based solid solutions. After laser welding, the microdeformations of the phase lattices are distributed unevenly over the cross section of the welded joint; namely, the maximum microdeformations and the resulting microstresses are concentrated in the heat-affected zone at the boundary between the weld and the titanium alloy.
Experiments on the effect of thermoelectric current magnetic field on welding of 60-mm thick dissimilar steels
Authors: Sliva A P , Goncharov A L , Terentyev E V , Kharitonov I A , Dragunov V K
Published: November 2019

The work describes a method for measuring the magnetic field induced by thermoelectric currents in control points above welded specimens and presents the measurement results. The dissimilar 60-mm thick steel samples are welded by electron-beam welding (EBW). The grades of the pairs of steels are 09Mn2Si + 12Cr18Ni10Ti, 09Mn2Si + 20Cr13 and 20Cr13 + 12Cr18Ni10Ti. The study shows that the electron beam in the weld root deflects towards the material with larger positive potential of integral thermal EMF. The deflection is uneven along the specimens, which necessitates taking into account the geometry of welding joints when elaborating the mathematical models of the process. Maximum deflection for the studied pairs of materials correspondingly amounts to 0.6, 2,8 and 3.8 mm, which is critical for producing a high-quality seam. In addition, the alteration of magnetic induction in control points during EBW was obtained.
Modeling heat input when friction stir welding
Authors: Statsenko V , Sukhorada A , Lelyukhin V
Published: November 2019

An important element of friction stir welding technology is the determination of the temperature of the material in the mixing zone, which can be determined by calculating the amount of heat introduced into the welding zone. To determine this value, experimental studies were carried out on a stand in which the material to be welded (aluminum alloy AMg5) is modeled as an experimental tube with a diameter of 20 mm, and the tool (from tool steel P6M5) is modeled as a working plate. On the stand, studies of the dependence of the frictional moment and heat-liberation value were performed. According to the obtained experimental data, the heat-liberation dissipation and heat power on the working tool are calculated, the dependences of these values on the radius of the working tool are obtained.

To increase the amount of heat input in the center of the contact area, a tool with a drive with two concentrically located (one inside the other) shafts is proposed, while the inner shaft rotates at a higher speed than the outer one. According to the obtained experimental data, the dependences of heat release for each shaft and the total heat release for a tool with two shafts at an external shaft rotation speed ω = 63 s-1 and different rotation speeds of the internal shaft are calculated. In total, for the external and internal shafts, the total heat release value is about 2 times higher than the total heat release value using a single shaft.

The purpose of this work is to find the values of heat release in friction stir spot welding, as well as the development of friction spot welding tools with higher heat release.
Post-treatment of arc-welded aluminum alloy joints by laser shock peening
Authors: Tareva A A , Melnikov D M , Melnikova M A
Published: November 2019

The possibility to improve aluminum alloy welded joints with laser shock penning was demonstrated. It was shown that microhardness of peened area in heat affected zone is higher than one without post-treatment. Also in this area the residual tensile stresses turns into residual compressive stresses. Laser peening process is proposed to carry out using low-energy lasers. In this case were analysed different types of ablative overlays.
Influence of spin creepage on contact patch
Authors: Tudorache M C , Oprea R A , Neagoe I
Published: November 2019

The wheel-rail contact patch analysis methods are related to the evolution of modern computers. Contemporary computation systems allow the approach of tri-dimensional methods which take into account various contact parameters. With this background in mind, the wheel-rail contact problem is a study under development. The paper proposes a tri-dimensional approach, considering the spin creepage parameters. The spin effect is due to the increase of the wear around the wheel flange and the gage face. At the same time, the spin is influenced by the wheel rolling operating conditions. The paper gives an insight of wear mechanisms analysis, plastic deformation and fatigue phenomenon of the contact patch constituent material.
The influence of additive manufacturing parameters on the structural and mechanical properties of acrylonitrile butadiene styrene (ABS) parts produced by fused filament fabrication
Authors: Cristea D , Pop M A , Faraian C , Munteanu D
Published: November 2019

The key to the operation of additive manufacturing is that the parts are made by adding the material layer by layer. Each layer is a thin cross section of the part derived from the original CAD data. Each layer must have a finite thickness and thus the resulting part will be an approximation of the original data. The thinner each layer, the more the resulting piece will be more like the designed part. All additive manufacturing techniques marketed so far use a layered approach. However, certain drawbacks were reported for this type of manufacturing, all depending on certain process parameters. One of the most important build parameters, in terms of cost and final properties, is the build construction angle. The influence of the build positioning (i.e. angle of the layers) in respect to the building plate, during fused filament fabrication of acrylonitrile butadiene styrene (ABS) parts was studied. The characteristics of interest were: the structural features of the manufactured part and the mechanical properties obtained after tensile, compression, and hardness tests, all as function of the build orientation, while keeping the remaining manufacturing parameters identical. It was observed that the build orientation has a significant influence on the properties.
Lean Business Practice as Support to QMS Implementation in According to ISO 9001:2015
Authors: Djapic M , Popovic P , Lukic L
Published: November 2019

The contemporary market conditions impose increasingly strict requirements on organizations. Orientation towards product quality is one of the optimum strategies enabling survival and development in the ever more globalized market. The business practice required by ISO 9001 standard is often insufficient for an organization to survive in the market. Therefore many organizations, in addition to developing and implementing Quality Management System (QMS), optimize their operative processes by implementing the Lean tools. The paper provides a concept of interconnecting the ISO 9001:2015 standard requirements with the possible Lean tools deployment, which is to contribute to promoting effectiveness of the implemented QMS.
Indoor path planning and obstacle avoidance simulation
Authors: Savu T , Jugravu B A
Published: November 2019

The paper is describing the work performed for choosing and designing a path planning and obstacle avoidance solution for a car-like vehicle moving in an indoor environment. The proposed algorithm first consists in providing the vehicle with a set of passing points generated by a Dijkstra path planning algorithm. The vehicle is using the points for establishing its path and is avoiding the obstacles using scanned data from a distance sensor. In a simulation environment, initial tests were performed for estimating correct values of the vehicle’s forward and angular velocities and for estimating the effect of the scanning speed on the vehicle’s behaviour. Obstacle avoidance tests were performed for identifying specific situations possible to appear due to high velocities or to low scanning speed. Even not always choosing a smooth avoidance path, the algorithm proved to find a way for avoiding the obstacle in a clear and fast enough manner.
Optimization of Heated Structures for Several Load Cases
Authors: Kretov Anatolii
Published: November 2019

Optimization methods providing maximum strength and rigidity of the thin-walled structure are considered. A critical overview of the works related to the optimization including the heated design is done. To optimize for several cases of loading, a minimization of functional is applied, which is the sum of the total potential strain energies for each case of loading. The optimization process begins with the initial basic structure, which includes all possible variants of the location of the power elements. In the optimization process, inefficient elements are eliminated by minimizing their rigidity. Numerical optimization studies on the example of truss construction are carried out.
Research on Method of Phantom Track Generation Based on Cooperative Control of UAVs in Uniform Linear Motion
Authors: Ouyang Zhiping , Xu Chen , Feng Jiqiang , Wang Bo
Published: November 2019

In order to effectively interfere with the networking radar, this paper establishes a reverse-pyramid model firstly based on the uniform linear motion of UAVs and the characteristic of phantom track. Furthermore, the multi-UAV cooperative track deception model is built to analyze the locations and motions of UAVs. Finally, we design a simulation experiment to obtain the motion parameters of each UAV and analyze the minimum number and speed of UAVs.
A Centralized Scheduling Algorithm in On-Board Hybrid Optical/Electric Switching
Authors: Zhang Yi , Li Jun , Zhou Quan , Li Jingling , Liang Wei , Cui Tao
Published: November 2019

To realize the interconnection of heterogeneous links, it’s necessary to develop the on-board hybrid optical/electric switching technology. Because of the separate scheduling strategy in on-board hybrid switch, there is conflict among different ports, and the cell loss rate is greatly reduced. In order to solve this problem, a centralized scheduling algorithm in on-board hybrid optical/electric switching is proposed. According to the parameters and characters of optical data and electric data, the proposed algorithm with the group performance idea can schedule the multi-granularity traffic by analysing the resource utilization of hybrid switch fabric, which has the principle of the highest throughput. This algorithm can increase the matching probability between input and output ports, reduce the inner congestion probability of hybrid optical/electric switch module, and improve the performance of this switch fabric. The analysis and simulation results show that the proposed algorithm has fewer parameters and simple implementation steps, which can effectively avoid congestion, and has the better performance than others in cell loss rate.
Intention
Authors: Vareschi Mark
Published: November 2019

Literary criticism has long wavered in its attitude toward intention, sometimes considering it inaccessible and undesirable, and at other times, the source and arbiter of meaning. Much of this debate hinges on whether intention is understood as a mental event in the mind of a human or not. While some influential scholars of literature have tended to approach intention with the view that intention is a mental state, philosophers of action have long held that intention is a description of action that occurs in the world. This latter view promises to reinvigorate intention as a useful concept in literary study as scholars continue to expand the notion of text, beyond its purely verbal component, to text understood as the literary artifact comprising, and shaped by, human and nonhuman agency alike.