bluuebunny/crossref_metadata_2025_split huggingface dataset:
Trends in the development of a digital quality management system in the aerospace industry
Authors: Kovrigin E , Vasiliev V 
Published: June 2020

Abstract
Taking into account the analysis of the literature on the development trends of the quality management system of aerospace industry organizations, it was concluded that today there is an acute question of creating effective information-analytical systems for making managerial and other decisions in the development and production of aerospace products, in particular aircraft engines. The purpose of this article is to develop a model of information-analytical system that allows to predict the level of quality in the development and production of aircraft engines. To achieve this goal, modelling methods were used, as well as information analysis and generalization. As a result of the study, a forecasting model and a quality control scheme for the development and production of aircraft engines at different stages of the life cycle were developed and tested, allowing getting a complete picture of it.
Study of the specific energy of universal electrode materials for hybrid ultra-high-volume capacitor systems
Authors: Sleptsov V V , Ushkar M N , Zinin Yu V , Shchur P A , Diteleva A O , Lwin K Z 
Published: June 2020

AbstractThe article discusses specific energy of universal electrode materials based on Busofit for ultra-high-volume capacitor systems and hybrid ultra-high-volume capacitor systems based on LiCoO2and MnO2, which can be used in as sources of pulsed power in satellite solar panel deployment systems and emergency door opening systems and emergency platforms in airliners, including the Airbus 380 jumbo jet. The electroimpulse metallization of electrode materials and dependence of specific energy on weight of LiCoO2and MnO2was described. It was shown that hybrid ultra-high-volume capacitor systems increase its energy intensity up to 5,5 times compared with UCS.
Study of high-frequency oscillations and waves in Hall thruster plasma using two-dimensional full kinetic axial-azimuthal model (2D 3V Full PIC)
Authors: Khmelevskoi I , Tomilin D , Lovtsov A 
Published: June 2020

Abstract
The paper presents the results of Hall thruster plasma simulation using a 2D3V axial-azimuthal Full PIC model. Two types of solution are investigated in detail for two different magnitude of the magnetic field. In the calculations, different types of azimuthal waves were observed. By their characteristics these waves can be corresponded to the electron drift instabilities, gradient-drift waves and ion plasma resonance. The ion plasma resonance was observed in calculations with the magnetic field increase.
Analysis of the power part architecture for short-medium-range aircraft control system with local hydraulic systems by reliability criterion
Authors: Postnikov S , Trofimov A , Smagin D 
Published: June 2020

Abstract
This article provides a comparative analysis of the traditional control system power part for a short-medium-range aircraft with a control system power part with local HS. Comparison is based on the criterion of reliability. As initial data, statistics on the probability of failures of the electrical system and hydraulic system and actuators. The considered architecture of the control system power part with local HS fully complies with the required standards for the control system reliability given in regulatory documents, such as AR-25 and CS-25. The considered architecture of the control system power part with local HS is commensurate with the reliability of a typical version of the control system power part architecture. The considered architecture of the control system power part with local HS fully complies with the required standards for the control system reliability given in regulatory documents, such as AR-25 and CS-25. The considered architecture of the control system power part with local HS is commensurate with the reliability of a typical version of the control system power part architecture and in some cases it is an order of magnitude superior.
Computational and experimental investigation of a weakly diverging ion beam source
Authors: Cherkasova M , Mogulkin A , Nigmatzyanov V , Obukhov V , Peysakhovich O , Popov G 
Published: June 2020

Abstract
This paper presents the idea of space debris removal by the ion beam. The main part of this idea is the ion source on the board of the spacecraft. The ion beam should be narrow, with small half-angle of divergence - about 2°. Angle of divergence means that in there are 95% of ions in this angle. Authors show the concept of the slotted ion optic system. Based on calculation, the construction of the ion optic was designed and tested as part of the laboratory model of the ion source. The results obtained during the experimental testing verified the possibility of using an ion source of such type as an ion injector, which can be installed on board a next-generation spacecraft for the removal of space debris objects.
Deformed state of viscoelastic bodies in one problem of tidal interaction
Authors: Zlenko A 
Published: June 2020

Abstract
In our previous articles we considered the motion of two viscoelastic bodies in the gravitational field of a massive material point. We studied the evolution of the bodies, stationary solutions and their stability. We solved the equations of translational-rotational motion of the bodies together with the equations of their deformed state, using the method proposed by V G Vil’ke for the systems with infinite numbers of degrees of freedom. In our manuscript we continue our research and our aim is to get the global characteristics of the bodies, deformed by tidal forces: their shape, moments of inertia, the tidal lag angle, the relationship between the viscosity coefficient and the lag angle, tidal torques, internal material properties, depending on elastic constant and viscosity coefficient. It is very important for study of an evolutional motion of the celestial bodies, since tides affect this. In order to achieve this goal we use the tidal potential perturbation and displacements of each point of the bodies. The formulation of the problem, goal set and used methods are the novelty of our research. We applied our theory to the Earth, and it was found that the Earth’s substance (in global) behaves like an auxetic.
Criterion for evaluation of erosion of aviation engine parts from polymer composite materials
Authors: Ravikovich A Y , Kholobtsev D P , Arkhipov A N , Shakhov A S 
Published: June 2020

Abstract
A criterion is proposed for assessing the reliability of parts made of polymer composite materials in the event of sand and dust entering the compressor during take-off and landing. Conducting erosion tests with a concentration of abrasive particles corresponding to a conventional dust stream is practically impossible due to their long duration. When conducting tests with a high concentration that is several orders of magnitude higher than the concentration of a conventional stream, the reliability of the estimate is reduced due to the need to extrapolate the results to a large resource. Therefore, to improve the accuracy of the assessment of the erosion resistance of engine parts from polymer composite materials, it is proposed to conduct periodic measurements of the thickness of the part during operation. By calculating the dynamic eigenfrequencies and oscillation shapes and maximum static stresses, the critical thickness of the part is established, below which its eigenfrequency approaches the dangerous rotor harmonics.
The influence of the weld line location on the mechanical characteristics of lugs from short fibers reinforced composite material
Authors: Kurkin E I , Spirina M O , Zakhvatkin Ya V , Chertykovtseva V O 
Published: June 2020

Abstract
The work is devoted to assessing the influence of the weld line on the mechanical characteristics of lug from short-reinforced composite material PA6 Aramid SV 30-1ETM. Lug molding process was calculated in Moldex3D, including prediction of weld line position and fiber orientation. Static structural analysis was done in ANSYS Workbench with nonlinear anisotropic material model, constructed in Digimat MX by reverse engineering. For failure prediction Tsai Hill 3D transversely isotropic model with FPGF (PGA) formulation was used. The ultimate load is taken as the minimum load at which the maximum value of the FPGF criterion reaches unity. Three cases of melt entrance point position was compared. The smallest stiffness and strength were shown by lug in which the weld line located closest to the maximum values of the strength criterion.
The influence of network structure on quality of satellite corrections for precise point positioning in GNSS
Authors: Podkorytov A 
Published: June 2020

Abstract
Network solution and user solution for precise point positioning in global navigation satellite systems are considered in the study. GPS ionosphere-free observation model with decoupled clocks is used for applying the procedure of ambiguity resolution of phase measurements. Four different variants of network solution based on European stations from a network of International GNSS service are considered. The other two variants of network solution are based on stations from a network of Russian satellite based augmentation system. Six investigated variants of network solution are varied in number of stations, total area, receiver types, configuration and measurements quality. Network products computed in different variants of network solution are then used for the user solution with applying the procedure of ambiguity resolution of phase measurements. The influence of network structure on accuracy and convergence time of precise point positioning with ambiguity resolution of phase measurements is analyzed. The properties of network structure are listed and described. Obtained precise point positioning results are averaged and discussed.
Time series forecasting by global optimization method
Authors: Balyk V , Balyk E , Vakulchuk V 
Published: June 2020

Abstract
The actual problem of time series forecasting associated with the choice of the type of forecasting functions is considered. The aim of the work is to develop a new forecasting method, in which, along with the construction of the predictive function, the values of the predicted characteristics are directly optimized at the entire depth of the forecast. The developed method belongs to the class of probabilistic statistical forecast methods and partially to the class of feedback methods. Typical representatives of the methods of these classes are correlation and regression analysis, factor and variance analysis, statistical modeling. In the new method the predictive function is constructed in the basis of trigonometric polynomials, which leads to multi extremality of the forecasting problem. In this regard, to solve the problem of forecasting, the method of global optimization, hereinafter called the criterion shifts method, is used. The developed forecasting method allows solving a wide range of practical forecasting problems. Since the method of global solution search is used, it guarantees the exact finding of the predicted characteristics obtained as a result of their optimization by the criterion of regularity. The results obtained in this article showed high accuracy.
Acceptable range parameters of asymmetry of spacecraft descending in the Martian atmosphere
Authors: Kurkina E V 
Published: June 2020

Abstract
The article discusses the technique to determine the region of admissible deviations of the asymmetry parameters of the spacecraft descending in the atmosphere from their nominal values. The effect of the principal resonance is taken into account. The uncontrolled descent of a spacecraft in the Martian atmosphere is considered for small asymmetry and a small angle of attack. A numerical simulation was carried out using this technique to determine the range of admissible restrictions of the parameters of the displacement of the mass centre of the spacecraft, the moments of inertia and aerodynamic moments due to small shape distortions.
Modeling and Simulation of Wastewater Electrocoagulation Reactor
Authors: Al-Barakat Huda Saeed. , Matloub Falah Kaify. , Ajjam Sata Kathum. , Al-Hattab Tahseen Ali. 
Published: June 2020

Abstract
Electro-Coagulation (EC) method is the most effective electrochemical treatment of the wastewater that contains heavy metals as pollutants such as (lead compounds). It is consumed less energy compared with the other conventional methods. In this work, the Computational Fluid Dynamics (CFD) modeling approach for the simulation of the EC unit was studied. Transport of species, current-voltage distribution, and fluid flow were simulated using the diffusion, Nernst-Planck, and Navier-Stokes equations, respectively. The commercial software (COMSOL 5.4) was used to solve the system of equations that govern this problem. The influence of different parameters such as Hydraulic Retention Time (HRT) (15-45 min), applied voltage (2-10v) rotating speed of electrode (0-150 rpm) on the EC reactor also has been studied. The extracted results from the simulation show how the voltage, current, velocity and concentration of the pollutant and coagulant are distributed in the reactor. Besides, the transient behavior of the lead removal from the water was demonstrated in this work. The obtained results from this study were compared with experimental results. The theoretical results showed a good prediction of lead removal from water by electrocoagulation system and they showed good agreement between predictive and experimental data.
Experimental Behavior of Continuous Hybrid Reinforced Concrete Spliced Girders
Authors: Aljanabi A Y , Hassoon A H 
Published: June 2020

Abstract
This paper conducts an experimental study on the behavior of two-spans continuous reinforced concrete spliced girders strengthened using steel fiber concrete of volume fraction of 1% at splice regions and side near surface mounted carbon fiber reinforced polymer bars of 6 and 10 mm sizes. Five beams with 150 × 250 mm rectangular cross section and 2200 mm total length were cast. The first beam was cast as one unit without joints as a reference while the rest were made from assemblage of three precast segments spliced together using cast in place concrete joints of 170 mm length located at the inflection points. All girders were tested using a single concentrated force at each midspan. The studied parameters were: existence of splices, using of steel fiber concrete at splice region, and strengthening of spliced girders using side near surface mounted carbon fiber reinforced polymer bars. The results showed that existence of splices led to a decrease in the ultimate capacity of the spliced girder of about 33.1% with larger midspan deflections in comparison with the non-spliced girder. But, strengthening of spliced girders using CFRP bars could provide additional load capacity from 69.1% to 98.1% compared with the non-strengthened spliced girder with lower midspan deflections while steel fiber concrete at joints raised the ultimate load of spliced girders by 12.3%. However, the failure mode of the spliced beams were brittle if compared with the ductile failure of the control girder.
Design and Implementation a New Real Time Overcurrent Relay Based on Arduino
Authors: Hameed Ali Abdulsattar , Sultan Ahmed Jasim , Bonneya Mehdi F 
Published: June 2020

Abstract
This paper presents the new design and implementation of single phase overcurrent protection relay based on an Arduino NANO.. The relay is an electromagnetic switch which operated depending upon the input signal that can turn it (ON/OFF) when the measuring current is greater than of the sitting current. The proposed relay provides greater operating flexibility, high sensitivity, reliability, high speed, simple controller. This relay is designed and tested on the electric system, depending on the use of the controller.The experimental results from the electrical system test emerged efficiency and speed of the response system to protect it from any fault.
Effect of Spraying Nano Fertilizers of Potassium and Boron on Growth and Yield of Wheat (Triticum aestivum L.)
Authors: Noaema Ali Hulail , leiby Haider R. , Alhasany Ali R. 
Published: June 2020

Abstract
The experiment was carried out in one of the agricultural fields during the agricultural season 2018/2019 of Al- Rumaytha city 25 km north of Almuthanna province, to know the effectiveness of spraying Nano fertilizers of potassium and boron on the yield and growth of wheat crop. The experiment was laid out as split- plot within R.C.B.D. with three replicates were fertilizer of Nano potassium placed in the main plates with three concentrations (zero, 4, 8 gm−1) which symbolized by the symbol (K0, K1, K2) on the sequence, while Nano boron fertilizer was placed in the sub-plates with three concentrations (0, 1.5, 3 mg.L−1) were symbolized by (B0, B1, B2) on the sequence by using the full random sectors R.C.B.D with 3 replicates.
Results indicated that spraying by potassium nanoparticles with highest concentration of 8 m. L−1, showed a significant increase in many features of growth and yield, giving the highest mean of chlorophyll content (194.56 mg. m2), and plant height (98.24 cm). In addition, some of the components of the crop and the yield was increased the number of spikes (16.41%), the number of grain spike (8.29%), the grain yield (17.94%) and biological yield (14.31%). There was no significant effect between spray treatment and lack of weight on 1000 grains. In addition, the results showed that there were significant differences when increasing the concentrations of Nano boron in the solution, where concentration about 3 ml. L−1 in content of chlorophyll in leaves and the plant height. In addition, there were significant differences in some traits; the highest concentration (3 ml.l−1) gave the highest average number of spikes (395.90 spikes. m2), the number of grains per spike (56.64 grains.spike−1), total yield of seed (6761 kg.ha−1) and the biological yield (14533 kg. ha−1). While no significant due to boron treatment in the number and weight of 1000 grains.
The interaction between spraying Nano potassium and boron showed a significant effect on leaf chlorophyll content and the number of spikes per square meter only.
Analysis of Generation Means for Yield and Its Components in Tomato Crosses
Authors: Al-GUMAR Majid Khlaif , Ahmad Mohamad 
Published: June 2020

Abstract
Generation mean analysis was studied among hybridization of local cultivated tomato(P1) with wild type(Lycopersicon pimpinellifolium) (P2), the F1 plants was selfed for F2 seeds and backcrossed to get 6 tomato genotype plants P1, P2, F1, F2, BC1F1 and BC2F1 plants were planted in a randomized block design with three replications. The experiment was carried out at the Horticulture Department, University of Mosul. The results showed that The genetic parameters was additive for number of fruits/plant vit c, plant height, number of seeds / fruit,and fruit weight. Whereas the dominant effect was significant for: flower number/cluster fruit weight(g), plant height (cm) and total yield of fruits. The values of F1, BC1F1 and BC2F1 genotypes were exceeded their parents in the characters: of yield and number of fruits per cluster, Vit C, TSS%, and were under the control of duplicate epistasis while the number of locules per fruit was governed by complementary gene interaction.
Determining the impacts of environmental parameters on model microbial community dynamics isolated from Rustumihia WWTP/Iraq
Authors: Noor T , Ralebitso-Senior T K , Sarker M , Wright D 
Published: June 2020

Abstract
The composition of Rustumihia microbial community and their diversity with o-xylene-contaminants were investigated by applying molecular techniques, Polymerase chain reaction and denaturing gradient gel electrophoresis (PCR and DGGE) via investigating 16S rRNA gene fragments and understand the interrelationships between microbial community composition and structure for established microbial model community isolated from Rustumihia WWTP. To this end, that the established consortium could be used to assess the microbial response as defined by diversity and richness shifts, which are linked to changes in growth conditions. In this research paper a synthetic consortium was created by isolating indigenous microbial community members from the Rustumihia WWTP and subjecting consortium to different pH of (6.5, 7.0 and 7.5) and o-xylene concentrations of (0.5, 5 and 50 Mm) and temperatures (25°C, 35°C, 45°C and 55°C).
The results of this study indicated that the high o-xylene concentration of 50 mM was tolerated and degraded effectively at 35°C and 55°C, and pH 6.5 (P < 0.001). Bacterial richness and diversity were recorded according to the Hill parameters of 0
D, 1
D and 2
D under each of the growth conditions, and then linked to the o-xylene degradation efficiency. At 35°C and pH 6.5, the consortium achieved high degradation percentage for each of 0.5, 5 and 50 mM of o-xylene with values 73.1%, 94.8% and 63.08%, respectively. The current study is the first of its kind in Iraq. It investigates the enrichment, isolation, and identification of a microbial community from the Rustumihia WWTP and determines the efficiency of the isolates to tolerate and degrade o-xylene, highlighting their sole source of hydrocarbon. This research underscores the usefulness of molecular techniques for both diversity and richness to understand the ecological impact of o-xylene as a contaminant and to identify potential molecular techniques for detection of gene that is responsible for o-xylene degradation.
Synthesis and characterization of Ag nanoparticle inter Nickel/Aluminum-layer double hydroxide nano hybrids compounds
Authors: Alkhafaji Eussur N 
Published: June 2020

Abstract
This study describes the synthesis of nano hybrids compounds as silver nanoparticles AgNPs inter Ni-Al-layered double hydroxide (LDH) nano hybrid by ion exchange method. Ag as Ag NPs by reduce agent in starch solutions. The produced AgNPs are integrated on LDH surface. The material was characterized by X-ray Diffraction, Fourier Transform Infare spectroscopy, Atomic Force Microscopy and UV-Visible spectrophotomer. The expanded interlayer spacing of the Ag NPs/Ni-Al-LDH nano hybrid suggests the successful encapsulation of Ag NPs with Ni-Al-LDH. The prepared Ag NPs/Ni-Al-LDH nano hybrid compound could be suitable to use in future antimicrobial and anti bacterial applications, the make use of, more than 99% of all types of bacteria can be killed, also the AgNPs-LDH can also efficiently inhibit the bacterial growth and prevent the bio film formation in the nutrient solutions. These recently Ag NPs-LDH may offer a talented antimicrobial solution for clinical and environmental applications.
Synthesis and identification of some new amide alkaloids compounds from the extraction of cauliflower
Authors: Alkuwaity Dr. Eman Abdul wahab 
Published: June 2020

Abstract
The present study includes synthesis of new amide alkaloid derivatives from cauliflower alkaloids extracted by petroleum ether. the cauliflower is from species called (Brassiceoleracea). The resulting compound(botrytis alkaloid) react with ethanol alcohol to produced (ester alkaloid)then react with different amino acid (Phenyl alanine, Tryptophan, Tyrosine, Histidine, glutamine & asparagine) to give amid alkaloid derivates. The chemical structure of these compounds were identification by spectral techniques.