bluuebunny/crossref_metadata_2025_split huggingface dataset:
Determining the loads acting onto a cylindrical classifier of a globe mill
Authors: Khanin S I , Solodovnikov D N , Lebakh A V 
Published: July 2019

Abstract
Classifying devices have been developed that allow increasing the efficiency of operation of globe mills commonly used at industrial enterprises for milling various materials. Analytical equations have been obtained for the cylindrical classifier, allowing calculating the forces acting on the grate elements depending on design and process parameters of the mill. The forces acting onto the structure of a cylindrical classifier of an industrial globe mill were calculated, their changes have been analyzed. Stress in the design of the device were determined, its wear-dependent operability has been determined.
Exergic analysis of the installation for controlled dehydration of fine particulate products
Authors: Malibekov A A , Shakhov S V , Glotova I A , Sadibaev A K , Gruzdov P V , Ryazantseva A O 
Published: July 2019

Abstract
An installation is designed for dehydration of fine-particulate bulk products in the active hydrodynamic mode. A thermal system for heat-mass transfer during rapeseed dehydration in the active hydrodynamic mode is assessed for thermodynamic efficiency. Diagrams of thermal and exergy balance for heat-mass transfer processes are presented and heat exchange and exergy analysis are performed. Exergy loss by rapeseed dehumidification are calculated The research results show that the greatest loss of exergy occurs due to irreversibility of dehydration processes during the phase transformation, as well as due to the pressure drop in the device.
Hydraulic heat tests of the shell and tube heat exchanger using heated liquid of higher turbulization
Authors: Kuchev L A , Nikulin N Yu , Yu Feoktistov A 
Published: July 2019

Abstract
A short characteristic of the heat power industry of the Russian Federation is analysed. Special attention is paid to the technological condition of the central thermal electric main lines and boiler equipment, thermal networks and heat consumption systems. Moreover, it is specified that the important heat supply equipment systems are shell and tube heat exchangers. The emphasis is that the use of shell and tube heat exchanger devices is based on reliable technical solution, financial viability, and convenience in its operation and repair. Based on the analysis of local and foreign scientists’ research, the classification of approaches of heat exchange intensification in shell and tube heat exchanger devices is propounded. The article presents the results of thermal and hydraulic tests of an intensive shell-and-tube heat exchanger with increased turbulization of the heated fluid. When carrying out tests, modern high-precision measuring devices are used. A test objective comparison of hydrodynamics (losses of pressure) and heat technical characteristics (heat transfer coefficient) of two heat exchangers has been conducted. These are serial (state standard No. 27590.) and intensive (RU 185391 patent) exchangers.
Research and improvement of the process of two-stage profiling of tubes for special purposes
Authors: Parshin S V , Parshina A A 
Published: July 2019

AbstractRoll-forming process is used in manufacturing multi-beam oil tubes, while reducing their outer profile diameter and forming star-like profile. In this paper a steel tubes are studied with a drawing and pushing processes. This study gets into different issues including elastoplastic behavior, contacts and friction using finite element analysis. In simulations, a plane symmetric steady-state model is used. Numerical results are compared with experimental results. A better understanding and modelling of the behavior of materials lead to a new form of roller tool with significant advantages.
Analysis of the efficiency of telemetric systems for drilling wells
Authors: Zainagalina L Z , Petrova L V , Petrov V A 
Published: July 2019

Abstract
For efficient control of well drilling, it is necessary to know actual drilling conditions, parameters of the trajectory of previously drilled wells, to predict the trajectory of a new part of the well bottom, to know technological parameters in the bottom hole zone. Efficiency of the telemetry systems used for drilling wells was analyzed by calculating the economic efficiency for well drilling at the Taylakov field. Modern telemetric systems help avoid additional drilling costs and improve efficiency and reliability of well drilling.
Development of automatic systems for controlling and assessing the technological properties of grain processing products
Authors: Medvedev P V , Fedotov V A , Bochkareva I A 
Published: July 2019

Abstract
The paper describes an automatic system for controlling and assessing the technological properties of grain processing products during milling by computer vision methods. Optimal technological characteristics of the system are empirically established ensuring its maximum efficiency. The combined action of electrostatic fields (with voltage of 24 kV) and vibration (with frequency of 45 Hz) in the assembled testbed allows negating the conglomeration of grain milled particles. Such fast estimation of the technological properties of grain processing products allows interrupting and correcting the milling process for increased efficiency.
The mathematical description of the process of material milling in the zone of intersecting flows in a centrifugal counter-flow mill
Authors: Semikopenko I A , Vavilov D V , Vyalych S V 
Published: July 2019

Abstract
This article presents the analytical expression for the determination of the degree of milling of particles in a centrifugal counter-flow mill with a selective effect on the material to be milled. The degree of milling is one of the most important factors characterizing the efficiency of particle collisions in the opposite intersecting flows in the tangential sleeve. The projection w
x of the velocity of interaction of particles with an oblique impact is determined on the basis of the value of the tangential stresses in the zone of opposing intersecting flows. In this case, the density of counter-intersecting flows should be such that the collision of particles occurs in the zone of milling. The structural design of the mill rotors provides separation of the particle fluxes in the tangential sleeve depending on their size. This design of the rotors improves the efficiency of grinding and fineness of the finished product. A design diagram is given in order to describe the process of milling of a material in the zone of opposing intersecting flows. As a result of theoretical studies, the analytical expression was obtained that allows determining the degree of milling of material particles in the zone of tangential collisions depending on the design and technological parameters of a centrifugal counter-flow mill.
Development of a laser beam to the line in measuring systems
Authors: Galeev A S , Suleymanov R N , Filimonov O V 
Published: July 2019

Abstract
The way of laser radiation focusing on a reception matrix when carrying out measuring works applying a narrowly targeted beam is shown in this article. For example, centering the shaft (reduction to coaxiality) pump units allows preventing emergence of vibration. It is destructive for bearings. The optical scheme consists of several parallels and a photosensitive matrix of glass cylinders. We theoretically prove the possibility of using a system optically of transparent cylinders with the calculated indexes of refraction, including diameters for development of a dot laser beam to the line. At the same time the ratio “the power of a beam/power of hindrances” of a laser beam when receiving the line in close proximity to a reception matrix increases from 10-100 times. This depends on the distance between a matrix and a source of laser radiation. It allows using lasers of the 1 class with power no more than 1 mW. For the purpose of confirmation of feasibility of the developed design, experimental measurements are carried out.
Identification and evaluation of reliability factors of main oil pumps
Authors: Tynchenko V S , Bukhtoyarov V V , Tynchenko V V , Kukartsev V V , Shepeta N A 
Published: July 2019

Abstract
Preventative maintenance systems today are not always able to achieve projected levels of the main pumps use because of the presence of random technical, technological and statistical errors. It is necessary to identify the mean time between failures, reducing factors in situations where exploitative parameters are within the normal limits. It is offered to use statistical indexes and standard parameters for the analysis. Factor analysis defines a moderate negative correlation between the vibration velocity of the fixed pumps’ parts and the mean time between failures. Also, a weak positive correlation between vibration velocity and other parameters has been determined. The results can be used to improve preventive maintenance systems, as well as to choose the most reliable structural performance.
Main reasons of leaktightness failure of detachable flanged joints with lens seal ring
Authors: Pogodin V K , Gozbenko V E 
Published: July 2019

Abstract
The main indicator of the performance of any design of detachable joints is its tightness, which is ensured by pressing the sealing surfaces of its parts to each other with a certain force. The frequent depressurization of detachable joints arising in practice is explained by the difficulty of determining the force that takes into account the influence of the design features of the parts of detachable joints and the intensity of their change from external conditions and the time of operation. Work on the definition of tightness carried out by the authors is different in that they take into account changes in the contact characteristics and the mutual influence of irregularities of the contacting surfaces. Considering the results of previous studies on the relationship between the tightness of the sealing device and technological factors, it can be said that the role of these factors is very significant, but it is rather difficult to assess the joint influence of technological factors on the tightness of any one design. Development and operation of new detachable connections with a lens sealing ring should be carried out taking into account the analysis carried out in this study and the established reasons for their depressurization.
Identification of induction motor parameters with measurement errors
Authors: Ivanov D V , Sandler E A , Chertykovtseva N V , Tikhomirov E A , SemenovaY N S 
Published: July 2019

Abstract
This paper proposes an algorithm for estimating parameters of asynchronous traction motors in the presence of measurement errors. The presence of measurement errors of voltage and current leads to biased estimates of motor parameters. Algorithmic approach to eliminating the influence of noise is used most often as it increases the accuracy of estimates without precision current and voltage meters. Known modifications of algorithms based on the method of total least squares suggest filtering the derivatives of noise, which increases the complexity of the algorithm and also changes the statistical properties of noise. The proposed algorithm is a generalization of the total least-squares technique and does not require knowledge of the laws governing the distribution of measurement errors. The results of modeling show that the parameter estimation is highly accurate than the ordinary least square. The proposed algorithm can be used to create precision control systems, as well as to diagnose faults in electric motors by K parameters.
Perspective algorithms for the effective use of electro-osmosis for automatic installations
Authors: Porsev E G , Konyukhov V Y 
Published: July 2019

Abstract
The paper gives the evaluation research of performance potential of using the energy of ground aquifers for the power generation used for autonomous power consumer auxiliaries. The research to evaluate the performance potential of power generation from aquifers having the exact colloidal properties of the membrane dispersed phase and filtration ground properties was done.
Determination of fatigue resistance characteristics of helicopter rotor blade
Authors: Bokhoeva L A , Kurokhtin V Y , Rogov V E , Chermoshentseva A S 
Published: July 2019

Abstract
This paper presents an investigation of the fatigue resistance testing of structural elements of the helicopter by the example of testing of helicopter rotor blades samples. Endurance tests of components and structural elements of aviation equipment are the laboratory reproduction of external influences corresponding to the typical operating conditions, cyclic loading and functioning. However, these tests do not include research related to the gradual accumulation of damage leading to the emergence and propagation of cracks and construction failure. In this regard, a special interest is learning the process of cracks growth during the specimens’ full-scale tests. A brief description of the blades endurance tests process with simultaneous video shooting has been given. Stretching static load is applied to the samples, after those samples are additionally loaded by alternating bending moment. Videos of the cracks growth are processed and the data about the time of subcritical crack growth are obtained. This information is displayed as a graph. The control and measurement system is considered which is used in the process of testing for recording of values of stress occurring in tested specimens because of alternating bending load applied to them. The characteristics of fatigue strength are determined, fatigue graph is plotted, durability arithmetic mean and standard deviation are determined, assemblage of durability distribution curves, assemblage of fatigue curves and endurance distribution curve are plotted, endurance limit arithmetic mean and standard deviation are determined. The achieved results have importance for the prediction of the safe operation term of the helicopter rotor blades.
Influence of modification by nanodispersed powders on layered composite aerospace hulls and protective shields
Authors: Chermoshentseva A S , Pokrovskiy A M , Bokhoeva L A , Baldanov A B , Rogov V E 
Published: July 2019

Abstract
The paper presents data on the influence of nanopowder on the structure of layered composites. Different quantities of the nanomodifier, based on the nanodispersed silicon dioxide powder, were added to the composite. The experimental research has shown that modification of a small amount of silicon dioxide powder (mass fraction of concentration 0.3 wt. %) is effective for using the layered composite aerospace hulls and protective shields.
Comparative evaluation of corrosion resistance of wheel and rail steels in various media
Authors: Guseva E A , Kargapoltsev S K , Balanovskiy A E , Karlina A I , Shtayger M G , Gozbenko V E , Konstantinova M V , Sivtsov A V 
Published: July 2019

Abstract
In order to increase the service life of rolling stock parts and rails, it is necessary to know the value of the corrosion rate of alloys in various media. In this work, the corrosion resistance of various alloys, used in railway transport, was investigated. To determine the rate of corrosion, a polarization method with the use of the potentiostat-galvanostat “Pi 50-Pro” was used. The value of the corrosion rate was determined on the basis of processing of the polarization curves with the use of the graphical method. To control the obtained results, corrosion rate was determined by decrease of the mass of samples, made from the same alloys (gravimetric method). Obtained results showed high convergence. Studies were carried out in a simulated solution. Based on a comparison of the values of the corrosion rate, the most resistant steels were determined. Corrosion resistance increases in series: 09G2S, 110G13L, St3ps, 55G, 60G, M76T, E76KHSF12KH1, 12KH18N9T.
Identifying causes of defects in bearings used in agricultural machines
Authors: Semev K.M. , Kipriyanov F.A. , Savinykh P.A. , Medvedeva N.A. , Belozyorova S.V. 
Published: July 2019

Abstract
The paper considers causes of principal defects in thermal treatment of bearings and presents the results of microstructural analysis of samples taken from rejected ball bearing steel. It states the causes of the identified defects and introduces proposals aimed at reducing the incidence of defects in bearing manufacture arising during the thermal treatment.
How diverse can rare species be on the margins of genera distribution?
Authors: Backes Alice , Mäder Geraldo , Turchetto Caroline , Segatto Ana Lúcia , Fregonezi Jeferson N , Bonatto Sandro L , Freitas Loreta B 
Published: July 2019

AbstractDifferent genetic patterns have been demonstrated for narrowly distributed taxa, many of them linking rarity to evolutionary history. Quite a few species in young genera are endemics and have several populations that present low variability, sometimes attributed to geographical isolation or dispersion processes. Assessing the genetic diversity and structure of such species may be important for protecting them and understanding their diversification history. In this study, we used microsatellite markers and plastid sequences to characterize the levels of genetic variation and population structure of two endemic and restricted species that grow in isolated areas on the margin of the distribution of their respective genera. Plastid and nuclear diversities were very low and weakly structured in their populations. Evolutionary scenarios for both species are compatible with open-field expansions during the Pleistocene interglacial periods and genetic variability supports founder effects to explain diversification. At present, both species are suffering from habitat loss and changes in the environment can lead these species towards extinction.
Experimental traffic noise attracts birds during the breeding season
Authors: Hennigar Bronwen , Ethier Jeffrey P , Wilson David R 
Published: July 2019

Abstract
Understanding how anthropogenic disturbance affects animal behavior is challenging because observational studies often involve co-occurring disturbances (e.g., noise, lighting, and roadways), and laboratory experiments often lack ecological validity. During the 2016 and 2017 avian breeding seasons, we investigated the effects of anthropogenic noise and light on the singing and spatial behavior of wild birds by independently manipulating the presence of each type of disturbance at 89 sites in an otherwise undisturbed boreal forest in Labrador, Canada. Each treatment was surrounded by an eight-channel microphone array that recorded and localized avian vocalizations throughout the manipulation. We analyzed the effects of noise and light on the timing of the first vocalizations of each species at each array during the dawn chorus, and on the proximity of the vocalizing birds to the disturbance when those songs were produced. We analyzed all species combined, and then conducted separate analyses for the six most common species: boreal chickadee, dark-eyed junco, ruby-crowned kinglet, Swainson’s thrush, white-throated sparrow, and yellow-rumped warbler. When all species were analyzed together, we found that traffic noise attracted vocalizing birds. There was some evidence that light repelled birds, but this evidence was inconsistent. In our species-specific analyses, yellow-rumped warbler sang earlier in response to noise; Swainson’s thrush was attracted to noise and the combination of noise and light but repelled by light alone. Our study provides some of the first experimental evidence of the independent and combined effects of traffic noise and light on the vocal and spatial behavior of wild birds and suggests that breeding birds may be attracted to noisy roads where they could be exposed to additional forms of disturbance.
Social Trust in the Middle East and North Africa: The Context-Dependent Impact of Citizens’ Socio-Economic and Religious Characteristics
Authors: Spierings Niels 
Published: July 2019

AbstractOur knowledge of social trust's drivers in the MENA region is limited and there are good reasons to expect that theories based on Western countries cannot be copied to the MENA one-to-one. Arguing for a broader and at the same time context-sensitive comparative approach, I translate the ‘societal winners’, social capital, and religious beliefs mechanisms explaining trust to the MENA context. Moreover, I acknowledge intraregional diversity and test how the impact of these factors also differs among MENA countries. Empirically, I synchronize 47 surveys from 15 MENA countries, which provides the broadest and most systematic assessment of trust in the MENA to date. The results show that the societal-winner mechanism does not hold: employed, higher education and wealthier citizens are not more trusting. However, higher-educated citizens distrust other citizens more, particularly in the strongest autocracies. Religiosity seems pivotal too. Among others, service-attending citizens are more trusting, mainly where regimes regulate religious affairs. Overall, this study provides insight into what shapes generalized social trust in the Middle East and North Africa and it underscores that at a comparative level we need to consider inter-regional and intra-regional forms of context-dependency were we to formulate a broadly applicable theoretical framework of trust's drivers.
Attenuated apoptotic BAX expression as a xenobiotic reporter inSaccharomyces cerevisiae
Authors: Keniya Mikhail V , Monk Brian C 
Published: July 2019

ABSTRACTFungal infections are a major challenge to medicine and agriculture. Repeated and prophylactic use of antifungals can lead to pathogen cross-resistance to different classes of drugs. The early development of multidrug resistance in pathogenic fungi includes drug tolerance mediated by drug-dependent activation of drug efflux. In Saccharomyces cerevisiae and the fungal pathogen Candida glabrata, xenobiotic sensing motifs in transcription factors upregulate expression of several ATP-binding cassette (ABC) drug efflux pumps. We have therefore considered how drug candidates that trigger or prevent drug resistance could be identified and evaluated during drug discovery. We report a robust and sensitive, S. cerevisiae-based xenobiotic sensing system using the Pdr1 protein as a sensor and an attenuated version of the apoptotic murine BCL2-associated X (BAX) gene as a reporter. A molecular mechanism of attenuation that involves frameshift reversal may be associated with translation coupling and requires further investigation.