bluuebunny/crossref_metadata_2025 huggingface dataset:
Circular dichroism in spline shaped chiral metamaterial at mid-infrared
Authors: Ali H. , Chen J. , Zhang G.
Published: November 2019

Currently, scientists are intrigued by the vast potential of chiral metamaterials. These include a negative index of refraction, optical activity, circular dichroism, and asymmetric transmission. A planar chiral metamaterial supporting completely different left-hand and right-hand oriented polarized light within a spline shaped chiral metamaterial is proposed. Robust circular dichroism of the spline-shaped planned structure numerically is acquired. The reliance on geometrical parameters of spectral features, precisely spline thickness, and scanning angle is analyzed by a commercial software referred to as CST MICROWAVE STUDIO supported by the finite integration technique. The chirality parameter and, therefore, the surface-field response of the proposed structure are also determined. Because of the increased surface-field reaction and controlled features, the projected structure might have the potential for biosensing enforcements.
Influence of component and structure on laser induced voltage in sandstone
Authors: Meng Zhaohui , Zhu Jing , Zhan Honglei , Zhang Shanzhe , Chen Mengxi , Chen Ru , Zhao Kun , Yue Wenzheng
Published: November 2019

In this paper, ultraviolet laser with the wavelength of 248 nm was employed to assess the laser-induced plasma transmission spectroscopy of four kinds of sandstone. The research focused on the interactions between the laser pulse and the component as well as the structure of sandstone. The more complex metal ion content the rock has, the larger voltage signal the sandstone shows with the same bias current applied. The metal ion can stimulate the formation of plasma excited by the laser. Meanwhile, the excited plasma moves faster in the sandstones with more pores and gives the rock a shorter rise time. The measured voltage effect in sandstone indicates that ultraviolet laser is an approach to identify lithology of stratum by the peak values and rising times.
On the intersection of a chaotic attractor and a chaotic repeller in the system of two adaptively coupled phase oscillators
Authors: Emelianova A. A. , Nekorkin V. I.
Published: November 2019

We report on the phenomenon of intersection of a chaotic attractor and a chaotic repeller in a system of two adaptively coupled phase oscillators. This is a feature of the presence of the so-called mixed dynamics, which is a new type of chaos characterized by the fundamental inseparability of conservative and dissipative behavior. The considered system is the first example of a time-irreversible system in which this type of dynamics is observed. We show that a crucial factor in this effect is the detuning of the natural frequencies of phase oscillators.
Native interpreters in Russian America
Authors: Grinëv Andrei V. , Bland Richard L.
Published: November 2019

This article analyzes the formation of a special professional group of indigenous translator-interpreters in the
Russian colonies of America (including Mestizos-Creoles). They shared with the Russians all the hardships of opening up new lands,
acted as mediators between the new arrivals and the natives, settled conflicts, warned the Russians about dangers, and sometimes
perished during shipwrecks and attacks by hostile locals. Some of the interpreters participated in creating a written language for
the native inhabitants of Alaska.
Research on modernization directions of the human-machine interface of flight management system for future civil aircrafts
Authors: Neretin E S , Budkov A S , Ivanov A S , Ponomarev K A
Published: November 2019

The article proposed the description of the developed human-machine interface of the flight management system for future civil aircraft. The directions of development, existing solutions and also technical documentation requirements for this type of interface are analyzed. A number of solutions are proposed that implement new ways of presenting information and provide for intuitive and reliable interaction with a crew.
Induction heating simulation of the waveguide assembly elements
Authors: Bocharova O A , Tynchenko V S , Bocharov A N , Oreshenko T G , Murygin A V , Panfilov I A
Published: November 2019

The waveguide path systems consisting mainly of aluminum alloys with improved weight, size, and electrical parameters are used to ensure the functioning of the spacecraft and its onboard equipment in accordance with a given program. When assembling the elements of the waveguide paths, in particular a thin-walled pipe of rectangular cross section, coupling and flange, induction brazing is used. Element-by-element assembly of lightweight waveguide paths using the method of induction soldering is connected with a number of technological difficulties such as the uneven distribution of temperature fields, the thickness variation of the soldered products and the design features of the inductors. This paper presents a model describing the process of heating a pipe-inductor system during induction brazing. The presented model describes the process of induction heating of the pipe as a separate structural element of the waveguide path. In the process of simulation in the Comsol software, on the basis of numerical simulation methods with the connection of the necessary media involved in induction heating, the pipe heating graphs are obtained.
Analysis of axial forces in harmonic drives of mining machines and heavy industrial equipment
Authors: Strelnikov V N , Sukov M G
Published: November 2019

Special features of arising axial forces in heavy-duty harmonic gear drives with the disk wave generator are described. As a result of research performed, it is found that kinematic pairs formed by the wave generator disks and the flexspline serve as a source of axial forces in heavy-duty harmonic gear drives. The disclosure of physics of the effects taking place in the elastic kinematic pairs: disk – flexspline, determination of nature of axial forces acting in the area of the wave generator under load, allows uprating of the performance data, lifting of load-carrying capacity restrictions and providing full development of heavy-duty harmonic gear drives. The force analysis of the results of the experimental research of axial forces in the heavy-duty harmonic gear drives with the disk wave generator, arising in kinematic pairs: disk – flexspline - has been carried out. Axial forces were measured employing the method of strain gauging of the flexsplines of the heavy-duty waveform gear reduction units tested under the laboratory and production-line conditions of heavy engineering, with the adjustable load conditions. Functional connection of axial forces values with the harmonic gear drives design features has been established, depending on the external loads.
Production approaches of a human brain tissue phantom for robot-assisted stereotactic biopsy
Authors: Klimov D D , Buinov M A , Vorotnikov A A , Meleshnikov A M , Poduraev Y V
Published: November 2019

The article presents the production approaches of a human brain tissue phantom for robot-assisted stereotactic biopsy. The different types of materials used for the production of brain phantoms are shown. The experiments on the possibility of obtaining a sample of tissue simulating the brain, using a conventional biopsy needle with a side cutting window, are conducted. It is proved that silicone can not be used for production of a phantom of a brain tumor. The approach to the production of a phantom of two materials is proposed for use in the development of new robotic systems of stereotactic brain biopsy, as well as training surgeons.
Analysis of the possibility of excitation of soliton-like waves in crystals using the ab initio method and molecular dynamic simulation
Authors: Zakharov P V , Lucenko I S , Eremin A M , Starostenkov M D , Vdovin R S
Published: November 2019

In this article, using the first-principle approach and the method of molecular dynamics, the authors investigate the properties of a Pt3Al crystal with a view to the possibility of the existence of such waves of soliton-like waves as discrete breathers. Methodical aspects of crystal models building are presented, with the analysis of the advantages and disadvantages of each method. Such crystal properties as the density distribution of phonon states, dispersion curves, and electron density distribution are studied. Based on the density functional theory, it is shown that the spectrum of the crystal does not have a through band gap, however, along the <100> directions, it is possible to excite high-amplitude long-lived modes on Al atoms. The results indicate the benefit of the concept of discrete breathers in the investigated crystal.
Impact load influence on hardened polymer composite materials with metal elements built in the structure after microwave electromagnetic field treatment
Authors: Zlobina I V , Bekrenev N V
Published: November 2019

During the operation of air and land transport systems, as well as of small-sized vessels, the possibility of influence on their load-bearing structures and dynamic loads shell, including those initiated by a solid body impact, is high. Currently, a significant part of the structural elements of these products is made of fiber-reinforced polymer composite materials (PCM). Impact force is transmitted to the load bearing structures through the PCM product and can lead to the destruction of the connection and damage to the structures themselves. The structure of the PCM includes metal constructions in the form of grids and cellular elements, which creates additional stress concentrators and can affect the perception of shock loads. The studies of the perception of shock load by samples from hardened carbon plastics with a lightning-resistant copper mesh inbuilt in the surface layer and three-layer structures with intermediate cellular elements after their processing in a microwave electromagnetic field were carried out. The obtained results indicate the redesign of the matrix after exposure to a microwave electromagnetic field, and can be used in the development of technologies for final processing of the products made of PCM to increase their resistance to impact force.
Modified tungsten oxide-based filler for radiation protective polyimide composites
Authors: Yastrebinsky R N , Yastrebinskaya A V , Pavlenko Z V , Karnauhov A A
Published: November 2019

The paper presents the results of studies on surface modification of finely dispersed tungsten (IV) dioxide with polyethylsiloxane from a solution of n-hexane with the aim of its compatibility and the possibility of uniform distribution in the volume of the nonpolar polyimide matrix. The energy dispersive interaction of the press powder of polyimide and highly dispersed modified WO2 in a jet-vortex mill allowed for the activation of their surface, as well as high uniformity of distribution of the filler in the polyimide matrix and excluded the possibility of the formation of agglomerates. It is shown that the use of modified WO2 increases the degree of filling of the polymer composite by 15-20% and the increase in the density of the composite by 16.0%.
Analysis of modern methods for determining the dynamic friction of bulk materials
Authors: Erokhina O O , Kovalskaya K V , Ryaboshuk S V
Published: November 2019

The coefficient of dynamic friction is investigated in widespread gravitational flows of granular materials of numerous technological processes. The calculation of dynamic friction is necessary in the study of shear flows, the behavior of the sediment layer on an inclined plane, tracking the sticking motion, damping friction in structural dynamics and sliding resistance. The friction coefficients of particles against each other depends on many factors (a set of physical and mechanical properties of particles, chemical and fractional composition, the presence of a lubricant, oxide films, moisture and other conditions, such as volume, angle and height of falling particles), each of which separately difficult to count. The experimental determinations of the value of the coefficient of internal friction during pressing are the most reliable; however, such methods are not applicable in the course of analyzing mixtures in the mining and metallurgical industries due to the fact that bulk materials of this type are characterized by gross porosity and are prone to breaking during similar experiments. To obtain reliable results of mathematical and computer simulations, there is a need to evaluate the mechanics of flow of granular materials or bulk solids. There is a shortage of ways to predict these patterns, that require understanding and conducting extensive basic research. At present, several models are used to describe the connected state of materials (soils, sands, granules and powders): soil mechanics, hydromechanical (continuum mechanics), continuity hypothesis (phenomenological model). All existing methods are based on the average value of the characteristics of a large number of particles and can not be used to describe models with high fractional void volume, and as a result, do not describe each discrete particle in the composition of the flow of bulk materials. This article provides an overview of existing methods for assessing the dynamic friction of solids, their applicability in various situations, as well as the development trends of this scientific field.
Temperature spread modeling of electron beam heating process
Authors: Oreshenko T G , Bocharova O A , Tynchenko V S , Bocharov A N , Petrenko V E , Kukartsev V V
Published: November 2019

The research and creation of the mathematical model of temperature distribution in the electron beam heating, depending on the technological parameters are considered in this paper. A feature of this mathematical model is used by the process of producing welds of parts from aluminum alloys. Aluminum alloys are of great interest for various industries, such as aerospace, aviation, automotive, oil and gas, chemical industry and others, because the aluminum alloys has low weight. However, when welding aluminum alloys, various defects can occur, such as porosity or hot cracks, which limit it uses. One of the main problems is connected with the welding of aluminum alloys this is a problem of determining the causes of porosity during the design and technological preparation and production of products prototypes from the new alloys, also the recommendations preparation for the welding technology of these products.
Description of vibrational oscillations in the viscous concrete medium by cylindrical punches
Authors: Kirilov I V , Khanin S I , Voronov V P
Published: November 2019

Analytical expressions for describing changes in the amplitude and phase shifts of the velocity of propagation of oscillations in a viscous concrete medium as applied to vibroform with cylindrical punches were obtained. Using graphical dependences, the influence on the parameters of the distance from the surface of the punch to the oscillating particle, the frequency and amplitude of its oscillations were established.
Chromatographic study of the component composition and antioxidant activity of polyphenol complex in biological raw materials
Authors: Averyanova E V , Danilchenko Yu V , Fedorova N V
Published: November 2019

Recently, the attention of many researchers has been attracted by raw materials that contain flavonoids. The purpose of the research is to summarize the results of studies of the composition of flavonoids of a non-fat sea buckthorn meal, which is a secondary raw material for the production of sea buckthorn oil. In this case, the sum of the five identified flavonoid compounds was isolated by extraction and subsequent adsorption column chromatography. At this stage, the actual problem of identifying and determining individual isolated flavonoids was solved using chromatographic (TLC, HPLC) and spectroscopic methods in comparison with reliably known samples. During the study, the flavonoids were identified: isorhamnetin, kaempferol, myritin, quercetin and its glycoside rutin, quercetin and isorhamnetin predominate. Ultimately, the effective parameters of the method for the improvement of the competitiveness of dietary supplements are established.
Magneto-liquid damping method and analysis of generated dissipative characteristics
Authors: Petrovsky E A , Morozova V A , Bashmur K A , Tynchenko V S , Bukhtoyarov V V , Kozhukhov E A
Published: November 2019

The paper presents the problem of damping technological equipment oscillations by electrical systems. A method of reducing the emerging vibrations using dampers with a magnetic fluid is proposed. The variants of the optimal location of the permanent magnets and the interaction of their fields for the effective design of the magneto-liquid damper are considered. The optimal scheme is obtained – “for repulsion”. The analysis of the known statistical data is carried out, and the correlation dependence of the dynamic viscosity on the magnetic field parameters depending on the gap between the permanent magnets is obtained. The values of vibration energy dissipation for the proposed magnetic- liquid damping method are obtained. The universality and adaptability of this method of damping vibrations in the process of reducing the vibrations of the technological equipment have been proved.
Investment in the improvement of maintenance service efficiency of processing equipment of an industrial enterprise
Authors: Konyuhov V Yu , Gorban A V , Gladkih A M
Published: November 2019

The article considers the role of investments in the growth of profitability of large-scale production due to the high wear of processing equipment because of the long absence of major repairs. It evaluates the effectiveness of the organization of maintenance service of the processing equipment operated in the shop of a metallurgical plant. The cost of the services provided by a specialized organization is determined. The paper describes the procedure for the settlement of accounts and the conditions of acceptance of equipment after service in the current production conditions in the Far North. In the final part of the article the financial, organizational and economic results of the activities are presented.
Time characteristics assessment of performance of information processing system using modified GERT-network
Authors: Tsepkova M I , Stupina A A , Korpacheva L N , Fedorova A V , Shmeleva Z N
Published: November 2019

When analyzing the efficiency, performance and manageability of information processing system, there arises the task to assess time characteristics of a system or its nodes, as well as to estimate task execution time in different startup modes under different conditions. Modified GERT-networks are used to solve this problem. The article describes the operation of forward and reverse algorithms for calculating the modified GERT-network, as well as provides their analytical comparison.
Multimethod genetic algorithm for the three-dimensional orthogonal packing problem
Authors: Chekanin V A , Chekanin A V
Published: November 2019

The article is devoted to design and investigation of a set of heuristics intended to optimize the three-dimensional orthogonal packing problem with the multimethod genetic algorithm. The proposed heuristics are based on five rules for selecting objects and seven rules for selecting free spaces of containers. The quality and time effectiveness for all these rules were determined. The probabilities of including these rules into new heuristics are given. The article contains results of computational experiments carried out on the standard instances of the three-dimensional orthogonal bin packing problem.
Calculation of a variable cross-section beam on an elastic foundation with two coefficients of compliance
Authors: Poliakov A M , Shtanko P K , Pakhaliuk V I
Published: November 2019

In this paper, the universal Kurdyumov-Kochanov method with approximation of the solution by a power function is used to calculate a beam of variable cross section located on an elastic foundation, characterized by two coefficients of compliance (bed coefficients). It is shown that this method is characterized by simplicity and efficiency in the study of beams not only with continuous, but also with piecewise-continuous laws of change in the dimensions of sections and external load. In addition, it can also be used to analyze the behavior of beams with discrete laws for changing the stiffness of an elastic base and loads acting on local sections of the beam. The effectiveness of the implementation of the method is confirmed by a number of test cases.
New method of COBRA parameters comparison
Authors: Pavlenko A A , Tynchenko V V , Bukhtoyarov V V , Boyko A A , Tynchenko S V , Stupina A A
Published: November 2019

The comparison between two or more number rows is very difficult and impossible to perform without additional mathematical processing and formulas. A tool is needed to determine whether the efficiency of the algorithm has significantly improved, the changes made, or at a certain level of significance, these changes have not made any special improvements to the operation of the optimization algorithm. The methods of variational series comparison were analyzed. A new method of variational series comparison was developed. The methodology was tested when choosing parameters and for comparing the influence of initialization methods on the global optimization genetic algorithm and the collective optimization method based on the Co-Operation of Biology Related Algorithms (COBRA) based on bionic algorithms. The studies showed that the new method of variational series comparison well fulfilled its functions and coped with its task.
Subject features of engineering activities of the supporting university
Authors: Knyazev N A , Buyankina R G , Zukov R A
Published: November 2019

The subject of the research is a subject basis of the inter-branch and interdisciplinary integration of modern scientific and technological processes in the “supporting university - industry” system. Subject features of engineering were described using the methodology of the post-industrial society and post-non-classical stage of scientific development. Analysis of materials allowed for the conclusion that it is necessary to consider engineering at the theoretical (in developed form - at the epistemological) level rather than using its empirical and information models. The complex interaction of disciplinary, general scientific and socio-ideological components in the relationship between the university and its interdisciplinary environment belongs to one of the most important features of the subject basis of engineering in the supporting university.
Modeling the dynamics of the distribution of company orders at their cost
Authors: Pervadchuk V P , Vladimirova D B , Derevyankina P O
Published: November 2019

Sales volume is one of the most important characteristic of business efficiency. In a detailed analysis and planning of sales it is necessary to consider not only lumped, but also distributed indicators. For this purpose, it is proposed to use developed mathematical model of distribution of orders at their cost. The model constructed by stochastic dynamics methods and described by the initial-boundary value problem for a one-dimensional partial differential equation of parabolic type. The paper presents the model rationale and also numerical example made in Comsol Multiphysics.
Development of GPS-based Tracking System to Evaluate the Effectiveness of Tillage using Four-wheel Tractor
Authors: Nugroho A P , Shalih S M , Purwantana B , Sutiarso L , Radi  , Markumningsih S , Masithoh R E , Yun J H , Kim K U , Yeo I C , Lee D G
Published: November 2019

The objective of this study was to present the development of GPS-based tracking system to evaluate the effectiveness of tillage using a four-wheel tractor. The system is composed of a location acquisition, using GPS (iGPSport), and data analysis for estimating the tractor trajectories and effectiveness of tillage by measuring the overlap during the tillage. The laboratory stage experiment was conducted to validate the system by measuring the specified size of the field and tractor trajectories. The performance evaluation of the system was done by measuring the displacement error of actual trajectories and the estimated one. The system was also tested for the actual tillage operation using a four-wheel tractor, Daedong Kioti RX7210, in two locations in Yogyakarta: Pajangan, and Moyudan. The tractor tracking system was developed based on GPS for estimating the tractor trajectory path and operation width distance (l) after the operation as tillage effectiveness evaluation by the evaluation of overlap and untillage land systematically using the tracking system. The system performance evaluation in the actual field for tillage operation using the four-wheel tractor in Moyudan and Pajangan shows that the RMSE < 50 cm, and the MAPE < 24% with R2 > 0.7. Overall performance of the tracking system, it could be used to estimate the behavior of tillage operation.
Appropriate adaptation of precision agriculture technology in open field cultivation in tropics
Authors: Nugroho A P , Sutiarso L , Okayasu T
Published: November 2019

Tropical agriculture production is profoundly affected by the uncontrollable environmental condition. To obtain good agricultural products, farmers manage their farm to fit with the variation of weather and season. The farming managements are generally determined according to farmers personal knowledge, gained from the long-term experience from preceding years. Nowadays, climate change intensifies unpredictable weather and its unstable distribution. Consequently, conventional farming management considering the climate change factor should be considered. The farming management should face the dynamic change of weather condition as well as improve the farmer’s knowledge towards the implementation of precision agriculture approach. The objective of this study was to introduce an appropriate adaptation of precision agriculture technology by the utilization of information and communication technology (ICT) to improve conventional farming management in tropical agriculture production. The framework is implementing cloud technology as a backbone, which can be extended with various knowledge such as data science, plant biology, plant physiology, biophysical, and biomechanical. The appropriate adaptation of precision agriculture represented by the improvement of the conventional farming method using the technological aspect by fostering their knowledge to adopt modern agriculture empowered with Information and Communication Technology (ICT). Learning process from data-information-knowledge on the application of precision agriculture will be documented at the PA Knowledge Management System.
Mathematical analysis the effect of traffic bump shocking and layer position on the physical properties of Strawberry fruit (Fragaria x ananassa) during transportation
Authors: Wahidah T , Bintoro N
Published: November 2019

Strawberry is known as a perishable fruit, it is very easy to be damaged as the effect of mechanical force, and this is one of the main problem in postharvest of this fruit. In Indonesia, it is often encountered a traffic bump across the road, this may create a shocking force that may affect the damage of the fruit during transportation. This research was intended to find out the effect of duration of shocking and layer position in the packing box on the physical properties of strawberry fruit. Application of shocking force was done using a special shocking apparatus to the strawberry samples inside wood package box which was arranged in three layers for a certain determined time. After shocking process the sample were then stored at room temperature and continuously monitored. It was found that both the duration of shocking and layer position in the box were significantly affect some of physical properties of the fruit, such as respiration rate, weight loss, brix content, firmness, and lightness of the fruit. The rate of change of physical properties of the fruit could be described appropriately using kinetics model of the zero or first order.
Effect of extraction time and pressing temperature on characteristic of cocoa powder quality
Authors: Anoraga S B , Wijanarti S , Sabarisman I
Published: November 2019

The aim of the research was to investigate the effect of extraction time and temperature on cocoa powder quality. The study was conducted at Cocoa Processing Incubation Laboratory, Agroindustry Program, Vocational College, Universitas Gadjah Mada in Juni-Juli 2018. The samples were fermented cocoa beans obtained from Banjaroya, Kulonprogo. First, cocoa beans were roasted and grinded. Then, 200 g cocoa liquor were extracted for 20, 30 and 45 minutes at 70, 100 and 110°C. Cocoa powder characteristics e.g: moisture content, fat content, the weight of cocoa bungkil, and colour level were evaluated. The result showed that cocoa powder which was extracted in 70°C for 30 minutes had a lowest moisture content (3,12 %). The fat content is about 40-47% for all treatment. The color intensity is similiar, with the most brightest are cocoa powder which was extracted in 70°C. The temperature treatment in 70°C were accordance with the quality standards of cocoa butter determined by SNI 3747:2009.
Occurance of Clavibacter michiganensis subsp. sepedonicus on Potato in South Sulawesi
Authors: Baharuddin  , Pabborong A , Kuswinanti T , Surapati U , Tuwo M
Published: November 2019

Bacterial ring rot caused by a gram-positive Coryneform bacterium C.m subsp. sepedonicus is an important disease in potato crops in the world. The disease is until now still belong to an A1 quarantine pathogen in Indonesia, although it was found in West Java since 2013. The objective of this study was to know the presence of bacterial ring rot in four potato district areas in South Sulawesi. Diseased samples were conducted from potato fields and storage warehouses in Enrekang, Gowa, Jeneponto and Bantaeng. Potato tuber samples were cutted and observed their vasiculer vessels and then isolated and grown the bacteria on NA and NBY media. Bacterial isolates were morphological and physiological characterized as well as patogenicity on eggplant and PCR test using specific primer for Cms 50F and Cms 50R. The results showed that Cms has become widespread in four districs in South Sulawesi. The disease incidence of bacterial ringrot in these districs reached above 30 %. All of 14 isolates were obtained from the results of a standard methods for identification (EPPO, 2006) showed that the presence of DNA band size of 224 bp, which indicated positively belong to C.michiganensis subsp. sepedonicus.
The Effect of Grain Germination to Improve Rice Quality
Authors: Rahman A N F , Asfar M , Suwandi N , Amir M R R
Published: November 2019

The stages of post-harvest processing have a very large influence on the yield and quality of rice produced. At the time of grinding grain, the high nutritional content in husks and bran are often wasted and used as animal feed. Through the process of germination of grain, the nutrient content in husks and bran can be used to increase the nutritional content of rice. The purpose of this study was to determine the effect of grain immersion and germination on the quality of rice produced. The method of this research was germinating grains by variation of soaking and incubation time. The duration of grain soaking, 12, 18, and 24 hours and incubation time period, 18, 24, and 30 hours. The parameters of this research, including ash content, protein, thiamin, and mineral content such as Fe and Mg. The data of this research was processed and tested by complete randomized design with one factorial. The result showed, ash and protein content of rice was a significantly different at 5% level on each treatment. For other parameters, thiamin was significantly different at 1% level on each treatment. The best treatment during the germinating grains process towards the quality of rice was soaking at 12 hours and incubation time 30 hours with length of grain sprout was 1 cm.
Sex determination of peach-faced lovebird (Agapornis roseicollis) using polymerase chain reaction (PCR) techniques
Authors: Nugraheni P , Purwaningrum M , Widayanti R , Haryanto A
Published: November 2019

Molecular sex determination is an effective solution to determine sex because it can be done early in the growing phase of a bird and the results are more accurate. Molecular sex determination is carried out based on the chromodomain helicase DNA binding (CHD) gene by using NP, P2, and MP primers. The purpose of this study was to determine the sex of peach-faced lovebird (Agapornis roseicollis) by detecting the intron size of the CHD gene on the Z chromosome and W chromosome by polymerase chain reaction (PCR). DNA samples were isolated from feathers of 14 lovebirds belonging to bird owners, which was sent to the Biochemical Laboratory, Faculty of Veterinary Medicine, Universitas Gadjah Mada. Amplification of the CHD gene using PCR techniques with NP, P2, MP primers electrophoresed with agarose gel 2,5%. Visualization under UV Transilluminator with a wavelength of 280 nm produce an amplicon as long as about 300-400 bp with males showing a single DNA band (ZZ) and females showing a double DNA band (ZW). Based on the electrophoresis results, it showed eight females and six males in 14 samples of lovebird used.
Informal education of aerosol science by animation – Theory and practice
Authors: Chen Colin W. K. , Chen Y. T.
Published: November 2019

Aerosol science is a scientific field with abstract and figurative characteristics. The object we are facing is extremely tiny matter, but its influence is actually happening to us. Therefore, how to make the general public aware of the basic nature of aerosol science and technology, making effective strategies is an important task for aerosol science researchers. This paper proposes a science education method that uses animation as an informal education method for aerosol science. First, to explore how to deal with the main methods of aerosol science in informal education. Then, the relevant knowledge of aerosol is deconstructed, classified, and then the textbook is constructed by animation. There are a total of forty-two episodes of the animations built, all placed on YouTube. This result is now available for web users to browse and collect user responses for future improvements.
Combined geotechnology potentials in the process of coal deposits integrated development
Authors: Kuznetsova L V , Anfyorov B A
Published: November 2019

Significant coal resources situated in open-pit recovered sides and bottom being non-demanded are considered to be irretrievably lost and written off as losses. Integrated (open and underground) technologies for final extraction of contour reserves applying a highwall miner complex and mobile mechanical equipment which improve coal recovery ratio are introduced in the article.
Calculating the parameters of the induced hydraulic fracture that moves in hard rock roof of a seam in the vicinity of the installation chamber
Authors: Cherdantsev N V
Published: November 2019

The results of solving the task for tracing the movement of a hydraulic fracture in the top rocks situated in the vicinity of a stope are introduced in the paper. The massif is loaded with equally component gravity field of stresses and is in the state of plane deformation. The bedrocks and top rocks (roof rocks) are rather tough and deform resiliently and when reaching the limit state fall as brittle materials. The task is solved in the framework of the model of the geo-mechanical state of the rock massif with the adjacent in-seam working. It is based on fundamental principles of the deformable solids mechanics and fulfilled applying the boundary element method and basic classical concepts about the fracture state, its stable or unstable growth in a brittle material. According to the results of the experiment, the trajectories of the fracture growth for a range of coordinate values, its initial position and the angle of gradient initial towards the horizon are built. The graphs of critical pressure changes while the growing of a fracture are introduced.
Comparison of typical control laws of crushing unit on the example of a jaw crusher
Authors: Nikitin A G , Tagiltsev-Galeta K V , Laktionov S A
Published: November 2019

To control the jaw crusher in a constantly changing input conditions, various types of typical regulators are used. It is necessary to take into account the fact that a modern jaw crushing machine is not only an element of the crushing and screening complex, but is also a system per se. Each element of this system has a certain isolation, up to the presence of an independent safety device in each subsystem. Safety devices are, for example, a toggle plate belonging to the protection devices of the mechanical subsystem, or a crusher drive control system based on monitoring the basic parameters of the electric drive belonging to the protection devices of the electrical subsystem. When controlling the mechanical subsystem, the values change proportionally, but in the control system of electric drive parameters their values change according to the type of controller used. When using the P-controller, the amount of correction to the control action is proportional to the deviation. The PI-controller provides a change in the magnitude of the correction to the control action not only in proportion to the magnitude of the deviation, but also depending on the accumulated action of the deviation of the controlled variable. The PID-controller takes into account not only the accumulated value of the controlled variable, but also the rate of its change. The parameters of the regulators were adopted by the method of Ziegler-Nichols. It is shown that each of the model regulators has its drawbacks, which may be insignificant during operation.
Models and mechanisms for managing competencies of IT services users
Authors: Zimin A V , Burkova I V , Zimin V V
Published: November 2019

The subject of the article is the models and mechanisms for managing the competencies of IT services users applied as intellectual support of decision-makers on issues of professional retraining and professional development of personnel. Models and mechanisms correspond to two problem situations, requiring, respectively, the implementation of a unified or personalized approach to the competencies formation, and are an integration of expert information, models of scalar and vector optimization, game models, as well as discrete optimization methods, simulation and game modeling. The use of the proposed models and mechanisms is demonstrated by examples of the formation of professional retraining and development programs for users of ERP system. However, they can be used to manage the competencies of specialists in other fields.
Framework for innovative determination of natural gas content in coal seams
Authors: Plaksin M S , Kozyreva E N , Rodin R I
Published: November 2019

The article discusses the development framework of the method and device for high-accuracy measurement of coal seam gas content. It is proposed to design a device ensuring full measurement of gas content of coal core from the moment of coring (drilling at a distance of 4 – 6 m from coal boundary in the gateway face) to sealing of a core in the thermobaric flask (chips reception container). The results obtained using thermobaric flasks are essential. For another thing, the authors consider the requirements imposed on a portable flow rate meter and on the device for gas measurement and recording during drilling in coal seam. The anticipated difficulties in determination of volume of gas release from borehole walls in the total volume of gas measured during drilling are described. Alongside with the production benefits, the device being developed will provide determination of up to 20 gas-kinetic and gas-dynamic characteristics of coal, which can offer new knowledge on the nature of coal-and-methane substance.
Improvement of the organizational and economic mechanism of waste management at a coal-mining enterprise
Authors: Kiseleva T V , Mikhailov V G , Mikhailov G S
Published: November 2019

The paper provides the analysis of the structure and dynamics of production and consumer waste generation at a coal-mining enterprise. The authors consider the organizational and economic mechanism of environmental management acting according to the environmental protection law, with a focus on the negative impact in the form of production and consumer waste generation. The analysis of the main environmental and economic indicators of the enterprise was performed, the result of which is the conclusion about the need to improve the existing organizational and economic mechanism of environmental management. Innovative elements of this mechanism, including ones adapted to this type of negative environmental impact, were developed. The charging scheme for providing false information, including in the official environmental reporting forms, is of current importance. Another innovative direction is connected with the algorithm for the formation of production program, taking into account the environmental constraints, and the system of distribution of current environmental costs depending on the level of environmental and economic risks. The work performed is of practical importance for industrial enterprises engaged in the formation and use of production and consumer waste in order to switch to a sustainable environmental and economic development.
Electric and hybrid vehicles supply systems implementation problems
Authors: Solovev Sergei V
Published: November 2019

This paper considers the problems of construction or execution of rail contact or wireless charge cars. This includes the description of introduced system components, as well as the problems which can be faced during the development, construction and implementation in civil infrastructure. Also, the ways and possible usage of such methods of transportation are considered. The implementations of renewable sources or energy are preferable for such system, since the usage of electrical (EV) and hybrid electrical vehicles (HEV) directed of reduction of oil and gas consumption, as well as the reduction of carbon dioxide emission. The paper provides discussion about the expediency of different topologies of contact rail and wireless supply systems on the EV and HEV including.
The choice of an optimal technological process for mechanical treatment of machine components based on structural models
Authors: Schipachev A M
Published: November 2019

The article discusses the optimization of a technological process for mechanical treatment of machine components. As a rule, a technological process implies many variants which complicate the mathematical solution of optimization tasks. In this regard, this work suggests considering a multi-variant technological process as a digraph. This method deals with searching all the graph paths and determining graph lengths, associated with the values of different optimization criteria. The article also considers the ways to choose the optimal path (corresponds to an optimal technological process). The detailed description of threshold optimization, as well as generalized criterion optimization methods, is given based on the example of a technological process for nut manufacturing.
The identification of the existence of stilt houses at Musi riverside settlement in Palembang
Authors: Wicaksono Bambang , Siswanto Ari , Kusdiwanggo Susilo , Anwar Widya Fransiska Febriati
Published: November 2019

The existence of Musi River influenced the forming of initial settlement in Palembang. Musi river was the main transportation way. Therefore, past people built their houses along the riverbanks. The stilt structure became the best solution as it was aligned and adaptive to the nature of the Musi River. The excellence of the stilt house is less realized by the modern city development. The emergence of new modern houses is easily found side by side with the stilt houses at riverside settlement. The stilt house as a part of vernacular architecture in Palembang tends to be abandoned. This research aims to investigate the existence of vernacular houses and settlements located on the Musi riverbank. In order to achieve this aim, study elaborate function pattern and the form of living existence. This study used a qualitative approach with two vernacular settlements at Musi riverbank as case study namely 3-4 Ulu and 30 Ilir village. Data were collected from six main sources, namely documentation, archival records, interviews, direct observation, participant observation, and physical artifacts. The result shows that there are two changes of the existence of a vernacular settlement at Musi riverside. Firstly, the existence is decreasing in term of space between houses, orientation to the river. Secondly, the existence is increasing in form of coexistence with the new activities and function accommodated by the river. Findings show that the changes are supported by community activities. The change also determines the elements of settlement and layout.
The psychological determinants of energy saving behavior
Authors: Mansor Razlin , Sheau-Tingi Low
Published: November 2019

The energy sector represents the largest sources of emissions by far, accounting for almost 68% of greenhouse gases emission in the world. Buildings contribute to 32% of overall global final energy use. Energy saving behavior often influenced by monetary incentive shall not be generalized into an office building context whereby the users have no financial responsibility on its utilities expenses. At present, the challenge of how to encourage users towards energy saving behavior (ESB) is one of the emerging topics attracting the attention of researchers. Thus, this study focuses to identify the psychological determinants of ESB in buildings. Using behavioral changes as an adaptation approach, an extensive literature search was carried out on 72 published literatures to explore the existing ESB model to specify the psychological determinants of ESB within a building context. The result of the content analysis indicates that the ESB among building users was attributed by several psychological determinants: Attitude, Subjective Norm, Perceived Behavior Control, Habits, Motivation and Energy Knowledge. The findings may serve as an initial reference to the management progress in fostering ESB among users in a building context.
Utilization of PT. Hok Tong liquid waste rubber industry in making of liquid organic fertilizer with addition of eceng gondok and EM4 (Effective Microorganism 4)
Authors: Ali Farida , Sari Tuti Indah , Arina  , Siwitri
Published: November 2019

The liquid waste of the rubber industry is currently not fully utilized, whereas the industrial rubber waste is the nutrient needed by plants, especially nitrogen (N), phospate (P2O5), and potassium (K2O). The presence of macro nutrients contained in the liquid waste of rubber industry is expected to be an alternative material for the manufacture of liquid compost. Water hyacinth is a plant that also contains a good macro nutrients for plants, so it can be used as an additional material to improve the nutrient elements of liquid compost fertilizer. This research aims to know the utilization of industrial rubber waste in the manufacture of liquid compost fertilizer with the addition of water hyacinth and EM4. The method used in making this liquid organic fertilizer was anaerobic fermentation process. The variables studied were addition of water hyacinth and volume of EM4 added. The results of fermentation were analyzed to obtain data of percentage of nitrogen, phosphate, and potassium content. Obtained results of liquid compost fertilizer, with the largest nitrogen content is 1.6% found in EM4 25 mL and water hyacinth 30 gr, the highest percentage of Phospate 0.160% found in liquid compost fertilizer with addition of water hyacinth as much as 20 gr and EM4 25 mL, highest percentage of Potassium equal to 0.358% is found in water hyacinth as much as 25 gr and EM4 25 mL.