bluuebunny/crossref_metadata_2025 huggingface dataset:
Long-range oriented graphene-like nanosheets with corrugated structure
Authors: He Dongxu , Xue Weidong , Li Zheling , Marsden Alexander J. , Prestat Eric , Hu Wencheng , Zhao Rui , Bissett Mark A.
Published: November 2018

Long-range oriented and corrugated graphene-like sheets were synthesized from a copper phthalocyanine (CuPc) precursor.
Diverse supramolecular structures self-assembled by a simple aryl chloride on Ag(111) and Cu(111)
Authors: Shu Chen-Hui , Zhang Shao-Ze , Wang Cheng-Xin , Chen Jian-Le , He Yan , Shi Ke-Ji , Liu Pei-Nian
Published: November 2018

Diverse self-assembled structures were obtained on Cu(111) and Ag(111) surfaces by using a simple and small 4,4′′-dichloro-1,1′:4′,1′′-terphenyl molecule.
Correction: Organic semiconductor perylenetetracarboxylic diimide (PTCDI) electrodes for electrocatalytic reduction of oxygen to hydrogen peroxide
Authors: Warczak Magdalena , Gryszel Maciej , Jakešová Marie , Đerek Vedran , Głowacki Eric Daniel
Published: November 2018

Correction for ‘Organic semiconductor perylenetetracarboxylic diimide (PTCDI) electrodes for electrocatalytic reduction of oxygen to hydrogen peroxide’ by Magdalena Warczak et al., Chem. Commun., 2018, 54, 1960–1963.
Element selective oxidation on Rh–Pd bimetallic alloy surfaces
Authors: Kondoh Hiroshi , Toyoshima Ryo , Shirahata Naoki , Hoda Asami , Yoshida Masaaki , Amemiya Kenta , Mase Kazuhiko , Mun Bongjin Simon
Published: November 2018

Element selective oxidation takes place on Rh–Pd bimetallic alloy surfaces depending on the near surface initial composition.
How efficient is Li+ ion transport in solvate ionic liquids under anion-blocking conditions in a battery?
Authors: Dong Dengpan , Sälzer Fabian , Roling Bernhard , Bedrov Dmitry
Published: November 2018

Anti-correlated motion of cations and anions leads to very low Li+ transference numbers in solvate ionic liquids.
Fe(CN)5@PIL-derived N-doped porous carbon with FeCxNy active sites as a robust electrocatalyst for the oxygen reduction reaction
Authors: Zhang Shao-hua , Gao Yi-jing , Cheng Shan , Yan Yi-long , Zhang Shi-Jie , Zhuang Gui-lin , Deng Sheng-wei , Wei Zhong-zhe , Zhong Xing , Wang Jian-guo
Published: November 2018

FeCxNy/N-PC catalysts derived by Fe(CN)5@PILs show high performance and catalytic activity for the ORR.
Phosphotyrosine prodrugs: design, synthesis and anti-STAT3 activity of ISS-610 aryloxy triester phosphoramidate prodrugs
Authors: Miccoli Ageo , Dhiani Binar A. , Mehellou Youcef
Published: November 2018

The application of the aryloxy triester phosphoramidate prodrug technology to ISS-610-Met improves its ability to inhibit STAT3 in cells.
Chemoselective oxidation of phenoxathiin-based thiacalix[4]arene and the stereoselective alkylation of products
Authors: Landovský T. , Dvořáková H. , Eigner V. , Babor M. , Krupička M. , Kohout M. , Lhoták P.
Published: November 2018

Phenoxathiin-based thiacalix[4]arene was subjected to exhaustive oxidation. Depending on the reaction conditions, the macrocyclic systems bearing four sulfonyl groups or three sulfonyl and one sulfoxide group are available in high yields.
An aminoquinoline based biocompatible fluorescent and colourimetric pH sensor designed for cancer cell discrimination
Authors: Mandal Jayanta , Ghorai Pravat , Brandão Paula , Pal Kunal , Karmakar Parimal , Saha Amrita
Published: November 2018

A simple, low cost aminoquinoline based pH sensor,HLwas prepared and it works at a low pH range.HLexhibits cell permeability and used as an effective tool for differentiating between normal and cancer cells.
A general strategy for printing colloidal nanomaterials into one-dimensional micro/nanolines
Authors: Li Yifan , Zhang Zeying , Su Meng , Huang Zhandong , Li Zheng , Li Fengyu , Pan Qi , Ren Wanjie , Hu Xiaotian , Li Lihong , Song Yanlin
Published: November 2018

A general strategy is demonstrated to print nanomaterials into 1D micro/nanolines with a multilayer or monolayer stack with a single-nanoparticle width.
Zipping assembly of an Fe3O4/carbon nanosheet composite as a high-performance supercapacitor electrode material
Authors: Li Jihui , Sun Kang , Leng Changyu , Jiang Jianchun
Published: November 2018

A two-dimensional Fe3O4/carbon nanosheet was fabricated by zipping assembly and showed a good electrochemical performance as a supercapacitor electrode.
Interaction mechanism between TiO2 nanostructures and bovine leukemia virus proteins in photoluminescence-based immunosensors
Authors: Tereshchenko Alla , Smyntyna Valentyn , Ramanavicius Arunas
Published: November 2018

In this research a mechanism of interaction between a semiconducting TiO2 layer and bovine leukemia virus protein gp51, applied in the design of photoluminescence-based immunosensors, is proposed and discussed.
Nanostructured thin lignin-derived carbon sheets as excellent reinforcement fillers in polypropylene
Authors: Chen Fenggui , Shi Wenbing , Zhou Dan , Zhang Qinqin , Lv Liping , Sun Jiaotong , Yang Liping
Published: November 2018

The sheet-like freeze-dried lignin-derived carbons act as advanced fillers for polypropylene composites with large interfacial areas and excellent mechanical properties.
A general approach for the site-selective modification of native proteins, enabling the generation of stable and functional antibody–drug conjugates
Authors: Walsh Stephen J. , Omarjee Soleilmane , Galloway Warren R. J. D. , Kwan Terence T.-L. , Sore Hannah F. , Parker Jeremy S. , Hyvönen Marko , Carroll Jason S. , Spring David R.
Published: November 2018

Divinylpyrimidine (DVP) linkers enable access to highly stable and functional antibody–drug conjugates.
Glassy relaxation slows down by increasing mobility
Authors: Mandal Suvendu , Franosch Thomas , Voigtmann Thomas
Published: November 2018

The glass transition separates a regime where relaxation speeds up by increasing small-particle mobility, from one where it slows down.
Dip-coating of suspensions
Authors: Gans Adrien , Dressaire Emilie , Colnet Bénédicte , Saingier Guillaume , Bazant Martin Z. , Sauret Alban
Published: November 2018

Three regimes of dip coating in non-Brownian suspensions are identified: pure liquid, heterogeneous coating and homogeneous suspension films.
One-step implementation of plasmon enhancement and solvent annealing effects for air-processed high-efficiency perovskite solar cells
Authors: Guo Yan , He Xiong , Liu Xin , Li Xin , Kang Leilei
Published: November 2018

One-step implementation of plasmon enhancement and solvent annealing effects via introducing a Au NR suspension leads to more efficient PSCs under ambient conditions.
Bioinspired photothermal conversion coatings with self-healing superhydrophobicity for efficient solar steam generation
Authors: Weng Dehui , Xu Fuchang , Li Xiang , Li Yang , Sun Junqi
Published: November 2018

Inspired by lotuses, self-healing superhydrophobicity is successfully integrated into photothermal conversion coatings, providing a long-lasting self-cleaning ability.
n-Type conjugated polymers based on 3,3′-dicyano-2,2′-bithiophene: synthesis and semiconducting properties
Authors: Sui Ying , Deng Yunfeng , Han Yang , Zhang Jidong , Hu Wenping , Geng Yanhou
Published: November 2018

Polymers based on bithiophene containing two CN groups are promising n-type semiconductors.
Intrinsically recyclable and self-healable conductive supramolecular polymers for customizable electronic sensors
Authors: Liao Hongguang , Liao Shenglong , Tao Xinglei , Liu Chang , Wang Yapei
Published: November 2018

An intrinsically conductive supramolecular polymer is prepared with remarkable thermal sensing and recyclable ability, providing a profound potential in green electronics.
Inner disk structure of the classical T Tauri star LkCa 15
Authors: Alencar S. H. P. , Bouvier J. , Donati J.-F. , Alecian E. , Folsom C. P. , Grankin K. , Hussain G. A. J. , Hill C. , Cody A.-M. , Carmona A. , Dougados C. , Gregory S. G. , Herczeg G. , Ménard F. , Moutou C. , Malo L. , Takami M. ,   the MaTYSSE Collaboration
Published: November 2018

Context. Magnetospheric accretion has been thoroughly studied in young stellar systems with full non-evolved accretion disks, but it is poorly documented for transition disk objects with large inner cavities.

Aims. We aim at characterizing the star-disk interaction and the accretion process onto the central star of LkCa 15, a prototypical transition disk system with an inner dust cavity that is 50 au wide.

Methods. We obtained quasi-simultaneous photometric and spectropolarimetric observations of the system over several rotational periods. We analyzed the system light curve and associated color variations, as well as changes in spectral continuum and line profile to derive the properties of the accretion flow from the edge of the inner disk to the central star. We also derived magnetic field measurements at the stellar surface.

Results. We find that the system exhibits magnetic, photometric, and spectroscopic variability with a period of about 5.70 days. The light curve reveals a periodic dip, which suggests the presence of an inner disk warp that is located at the corotation radius at about 0.06 au from the star. Line profile variations and veiling variability are consistent with a magnetospheric accretion model where the funnel flows reach the star at high latitudes. This leads to the development of an accretion shock close to the magnetic poles. All diagnostics point to a highly inclined inner disk that interacts with the stellar magnetosphere.

Conclusions. The spectroscopic and photometric variability on a timescale of days to weeks of LkCa 15 is remarkably similar to that of AA Tau, the prototype of periodic dippers. We therefore suggest that the origin of the variability is a rotating disk warp that is located at the inner edge of a highly inclined disk close to the star. This contrasts with the moderate inclination of the outer transition disk seen on the large scale and thus provides evidence for a significant misalignment between the inner and outer disks of this planet-forming transition disk system.
The mass of Albireo Aa and the nature of Albireo AB
Authors: Bastian U. , Anton R.
Published: November 2018

Aims. We aim to clarify the nature of Albireo AB and specifically to decipher whether it is an optical or physical pair. We also try to determine the mass of Albireo Aa.

Methods. We scrutinize and compare the available absolute astrometric data (from HIPPARCOS and Gaia DR2) of Albireo A and B, and we investigate the relative orbit of the pair Albireo Aa,Ac using orbit solutions based on ground-based interferometric measurements.

Results. The mass of Albireo Aa (K3 II) is surprisingly small; only an upper limit of about 0.7 M⊙ could be derived. The systemic proper motion of Aa,Ac differs from that of component B by about 10 mas year−1 with an uncertainty of less than 2 mas year−1. Albireo AB is therefore most probably an optical double.

Conclusions. Specific astrometric and spectroscopic follow-up observations clarifying the surprising mass estimate for Albireo Aa are recommended.
Algorithms and results of streaming whistler recognition
Authors: Mochalov Vladimir , Mochalova Anastasia
Published: November 2018

Algorithms for streaming whistler recognition are offered. Different stages of algorithms are considered. The developed algorithms are used on a mini-computer software and hardware complexes for monitoring very low-frequency electromagnetic radiation at the Karymshina station in Kamchatka, on Oybenkel Geophysical Observatory of the Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy (the Sakha Republic (Yakutia)), as well as recognition of whistlers is performed on the basis of open access data of abelian.org VLF station network in Todmorden United Kingdom (53,703N, 2.072W), Bielefeld Germany (52.146N, 8.458E), Cumiana Italy (44.96N, 7.42E), Warsaw Poland (52.16313N, 21.03094E), Australia Heathcote (36.804163S 144.67559E). Our whistler recognition results allowed us to establish on the days of strong whistler activity, there is an average positive correlation between the number of whistlers registered at Karymshino station in minutes of a day and the number of lightning strokes registered by WWLLN global network in minutes of a day in the coordinate rectangle LAT 25S-45S, LON 140E-160E (Australia).
Algorithms of ionospheric anomalies detection in “Aurora” system of operational data analysis
Authors: Polozov Yuryi , Fetisova Nadezhda
Published: November 2018

Algorithms for ionospheric data processing are presented in the paper. The algorithms are implemented in the real-time mode of ionospheric parameter analysis. They are a component of “Aurora” software system for geophysical data analysis. The algorithms allow us to estimate the state of the ionosphere in the region of Kamchatka Peninsula and to detect ionospheric anomalies. Assessment of the algorithms efficiency has shown that it is possible to use them to detect ionospheric anomalies that may occur on the eve of magnetic storms. The research is supported by the Russian Science Foundation Grant (Project No. 14-11-00194).
Detection and analysis of short-period geomagnetic perturbations during increased solar activity and magnetic storms
Authors: Mandrikova Oksana , Solovev Igor , Zaitsev Alexander
Published: November 2018

The dynamics of geomagnetic field variations on the eve and during the periods of magnetic storms of 2015 and 2017 has been studied (data of the horizontal component of the Earth’s magnetic field of the terrestrial station network were used). The method developed by the authors based on wavelet transform and adaptive threshold functions was applied. Weak geomagnetic disturbances synchronously appearing at the stations and preceding the onset of strong magnetic storms was extracted. The correlation of the isolated geomagnetic disturbances with the AE-index is shown, both in the occurrence times and in intensities. On the basis of comparison with interplanetary environment data (interplanetary magnetic field data and the solar wind parameters were analyzed), and also based on the results of other author works [1, 2]. we assume that the isolated effects have solar nature. The research is supported by the grant of the Russian Science Foundation No. 14-11-00194.
International project INTERMAGNET and magnetic observatories of Russia: cooperation and progress
Authors: Khomutov Sergey Y.
Published: November 2018

Various aspects of international network of magnetic observatories INTERMAGNET such as standards, requirements for magnetic measurements, different status of published data, etc. are considered. Modern state of Russian segment of INTERMAGNET, its significance and contribution to global network are estimated. The features of monitoring of Earth’s magnetic field at observatories Paratunka (PET), Magadan (MGD), Khabarovsk (KHB) and Cape Schmidt (CPS) of IKIR FEB RAS and prospects are presented in detail.
Joint analysis of low-frequency geoacoustic and deformation signals
Authors: Mishchenko Mikhail , Marapulets Yuriy , Larionov Igor , Bogomolov Leonid , Sychev Vladimir
Published: November 2018

Simultaneous monitoring of signals recorded by a three-component piezoceramic seismic receiver and by a laser strainmeter-interferometer have been carried out in Kamchatka since 2016. Cases of simultaneous registration of low-frequency geoacoustic and deformation signals were detected.
Reversals in the low-mode model dynamo with αΩ-generators
Authors: Godomskaya Anna , Sheremetyeva Olga
Published: November 2018

In the dynamic model αΩ-dimensions are simulated reversions of the magnetic field with a varying intensity of the α-generator. We consider such changes in intensity as a consequence of the synchronization of the higher discarded modes of the velocity field and the magnetic field. Dynamo regimes are studied depending on the change in the intensity of the generator.
Deformation-Electromagnetic Relations in Lithospheric Activity Manifestations
Authors: Larionov Igor , Malkin Evgeny , Uvarov Vladimir
Published: November 2018

It has been shown that dipole radiation of accelerated charges, described by Larmor relation, is the basis of the known mechanic-electromagnetic processes of rock deformation. Comparison of crust deformation acceleration with natural electromagnetic field parameters of ELF-VLF range showed good relation. It manifests in the maxima of occurrence frequency density of synchronous deformation-electromagnetic events on two dimensional histograms. The data of a laser strain-meter and a recorder of natural electromagnetic radiation of ELF-VLF range, recorded in a zone of increased seismic activity (Kamchatka, Karymshina site), were used. The authors made an assumption on the existence of stationary regions of deformation process and mechanic-electromagnetic transformations corresponding to regions with different mechanic properties and rock petrographic composition.
Remote sensing of seismic disturbances in the lower ionosphere according to observations of lightning electromagnetic signals
Authors: Argunov Vyacheslav , Karimov Rustam
Published: November 2018

Features of the remote sensing of seismic disturbances in the lower ionosphere are considered according to observation data of lightning electromagnetic signals passing over the earthquake epicentre, in Yakutsk. The technique has the ability to scan a large seismically active region or even several regions directly from one point, though in some azimuths there are limitations due to insufficiently high lightning activity. In last case, the receiving of signals at several spaced points is used.
Test mode of operation network of monitoring subsoil radon in the south of Sakhalin
Authors: Makarov Evgeny , Firstov Pavel , Kostylev Dmitry , Rylov Evgeny , Dudchenko Ilya
Published: November 2018

Radon monitoring in the literature is recognized as a promising method for the prediction of earthquakes. In the last decade, the promise of the radon method for predicting subduction earthquakes has been convincingly demonstrated on Kamchatka. The results obtained on the Kamchatka, give reason to hope for the detection of predictive anomalies in the radon field and for weaker, but not less dangerous, small-focus earthquakes on the Sakhalin Island. The southern part of Sakhalin Island is a region of high seismic hazard. On Sakhalin Island, in a test mode, a network of three radon monitoring stations in the subsoil air is launched using the forced convection method to search for earthquake precursors. Based on the literature data, it is assumed that the effectiveness of radon monitoring near the focal zone of small-focus earthquakes on Sakhalin Island will be significantly higher compared to the conditions of the subduction zone in Kamchatka. Data from the network of radon monitoring stations can be used as an additional parameter to substantiate the conclusions on possible scenarios for the evolution of the seismic process in the south of Sakhalin.
Identification of parameters and verification of an urban traffic flow model. A case study in Wrocław
Authors: Chalfen Mieczysław , Kamińska Joanna A.
Published: November 2018

A macroscopic model of road traffic flow in an entire city is constructed, using the example of Wrocław. The model is of deterministic-random type. The start and finish points of each vehicle journey are random elements of the model, while the street graph, routes of travel and traffic parameters are obtained in a deterministic manner. Vehicle speed is dependent on traffic density, and the time needed to cross an intersection depends on the number of waiting vehicles. The route of travel between given start and finish points is determined using Dijkstra’s algorithm, minimising the journey time. The street graph of Wrocław was constructed using data from the Open Street Map website. Identification of parameters and verification of the model were performed using hourly data on traffic volumes at the city’s major intersections in the years 2015–16, obtained from the Intelligent Transport System (ITS). Identification was made of the total number of vehicles travelling in the city at each time of day, a quantity that is difficult to determine by other methods. An accuracy of around 15% was obtained for times between 6.00 and 22.00, while for night-time the verification error exceeded 30%. The model may be used to analyse the impact of planned modifications to the transport system on traffic parameters in the city. It may also serve as a constituent of a larger model for investigating the effect of road transport on atmospheric pollution or for identifying areas at risk of noise pollution.
Evaluation of trophic parameters in newly built reservoir using canonical variates analysis
Authors: Kayzer Dariusz , Frankowski Przemysław , Zbierska Janina , Staniszewski Ryszard
Published: November 2018

Wielkopolska region has precipitation below country average and water shortage is especially visible during spring and summer, thus regeneration of water bodies play important role in saving of water reserves in rural areas. The newly built water reservoir is located in Nienawiszcz, Rogoźno commune, Poland. The aim of study was to compare experimental sites according to parameters describing water trophy like chlorophyll a, dry mass of seston, total organic carbon, biochemical oxygen demand and according to concentrations of nitrogen and phosphorus compounds. Sites were compared using location in reservoir and year season. In the year 2014 (after connection of both parts of lake) part A and B of reservoir had similar trophic conditions, thus confirming stabilisation of the reservoir as an initial freshwater ecosystem. Water table level was also stable, thus low average water depth was not affected water quality Based on canonical variates analysis it was showed, that changes of nitrates and total nitrogen concentrations strongly affected the variability of experimental objects in comparison to concentrations of nitrites and total phosphorus. In the year 2014, after connection of both parts A and B the reservoir start to stabilise in case of similarity of water quality parameters in surveyed sites.
The influence of weight coefficients in the Preissman scheme on flows in the lower Odra river network using the Hec-Ras software
Authors: Mańko Robert
Published: November 2018

Mathematical modelling of water flows processes in rivers and open channels for many years has been target of researches for hydrotechnics and hydrologists. For flows forecasting in open channels models based on one-dimensional equations are mostly used. This models are assuming that the main flow component is parallel to the channel axis is substantially larger than others, so it can ignore them. One of the most effective methods for solving de Saint-Venant equations is the finite difference method with using four-point Preissman Scheme. In this paper an analysis of the impact of Preissman weighting parameters on flows in the lower Odra river network.
Mathematical modelling of solid desiccant systems
Authors: Pacak Anna , Pandelidis Demis , Anisimov Sergey
Published: November 2018

In this study, the mathematical model equations for solid desiccant system integrated with indirect evaporative coolers with Maisotsenko - Cycle are presented. The authors chose the modified ε–NTU method to describe heat and mass transfer processes in regenerative indirect evaporative cooler and desiccant wheel. The models based on the ε–NTU method show satisfactory agreement with experimental results. That is why this method allows to analyze and develop the performance of solid desiccant systems. In this study, the models allowed to prove that solid desiccant system with an additional heat exchanger before the desiccant wheel (System 1) obtains higher thermal COP values, higher humidity ratio drop and lower supply airflow temperatures in comparison to system with only one heat exchanger after the desiccant wheel (System 2).
Monitoring the Impact of Environmental Manipulation on Peatland Surface by Simple Remote Sensing Indices
Authors: Rastogi Anshu , Bandopadhyay Subhajit , Stróżecki Marcin , Juszczak Radosław
Published: November 2018

The behaviour of nature depends on the different components of climates. Among these, temperature and rainfall are two of the most important components which are known to change plant productivity. Peatlands are among the most valuable ecosystems on the Earth, which is due to its high biodiversity, huge soil carbon storage, and its sensitivity to different environmental factors. With the rapid growth in industrialization, the climate change is becoming a big concern. Therefore, this work is focused on the behaviour ofSphagnumpeatland in Poland, subjected to environment manipulation. Here it has been shown how a simple reflectance based technique can be used to assess the impact of climate change on peatland. The experimental setup consists of four plots with two kind of manipulations (control, warming, reduced precipitation, and a combination of warming and reduced precipitation). Reflectance data were measured twice in August 2017 under a clear sky. Vegetation indices (VIs) such as Normalized Difference Vegetation Index (NDVI), Photochemical Reflectance Index (PRI), near-infrared reflectance of vegetation (NIRv), MERIS terrestrial chlorophyll index (MTCI), Green chlorophyll index (CIgreen), Simple Ration (SR), and Water Band Index (WBI) were calculated to trace the impact of environmental manipulation on the plant community. Leaf Area Index of vascular plants was also measured for the purpose to correlate it with different VIs. The observation predicts that the global warming of 1°C may cause a significant change in peatland behaviour which can be tracked and monitored by simple remote sensing indices.
Estimation of diurnal total radiation based on meteorological variables in the period of plant vegetation in Poland
Authors: Stanek Paulina , Kuchar Leszek , Otop Irena
Published: November 2018

The paper presents selected models for the estimation of diurnal total radiation on the basis of other meteorological variables (using simple data as temperature and rainfall) in the vegetation months in the territory of Poland. For that purpose 6 meteorological stations were selected, having standard meteorological data as well as total radiation data for the period of 2001 – 2010. The stations were chosen so that two of them were situated on the coast, two in the lowland part of the country, and two in the mountains. The models were evaluated with the use of the coefficient of determination R² and the relative error of estimation RMSE with division into 6 months and 6 meteorological stations. In each of the regions the best results were obtained for models 6 and 7 which are combinations of the remaining models and additionally the constructed variable ΔT, used in other non-linear models analysed in the other studies. The best fit for those models was obtained for the mountain stations (R² from 0.67 to 0.75, RMSE from 2.7 to 4.4). The poorest estimation was obtained for the coastal stations (R² from 0.41 to 0.67, RMSE from 2.6 to 5.1). The paper does not indicate the best month in terms of the fitting, due to the high variation of results for the stations and the models.
An analysis of the hydrological regime as a factor influencing on the distributions of maximum annual flows
Authors: Szulczewski Wiesław , Jakubowski Wojciech , Tokarczyk Tamara
Published: November 2018

Statistical models of freshet flows are the basis for the design of hydrotechnical structures and for undertaking all and any activities related with flood threat. With regard to the method of data preparation for estimation and to the estimation procedure itself, the methods applied in such situations can be divided into two parts - FFA (Flood Frequency Analysis) and POT (Peak Over Threshold). In this study a comparison of those methods is made, using an original mixture of distributions (FFA) and an original procedure of distribution estimation (POT) for six selected water gauges on the river Odra.
Modeling and calculation of hydromechanical systems dynamics based on the volume rigidity theory
Authors: Rybak Alexander T. , Shishkarev Mikhail P. , Demyanov Alexander A. , Zharov Viktor P.
Published: November 2018

A method for modeling hydraulic systems of hydromechanical devices based on the application of the volume rigidity theory - the property of the hydraulic system to keep its volume unchanged when the pressure of the working medium changes is proposed. The main analytical dependencies intended for modeling the hydraulic system are presented. An example of simulation and calculation of a hydromechanical shock absorber system which confirms the correctness and convenience of using the volume rigidity theory in modeling hydromechanical drive systems of complex machines is presented. The results of the numerical experiment make it possible to evaluate the functioning quality of the drive system under investigation to reveal the effect of the main design and system functional parameters on its operation. The graphs of the change in the main functional parameters of the shock absorber under investigation in real time are given, which make it possible to visually evaluate the results of a numerical experiment and draw conclusions about the need for modernization.
Experimental studies of ride quality of selfpropelled combine harvester
Authors: Sirotin Pavel V. , Sapegin Aleksandr G. , Zlenko Sergey V.
Published: November 2018

The given work is devoted to the study of dynamic loads acting upon a combine harvester, which is one of the most vibration-loaded types of modern transport and technological machines. The results on the evaluation of dynamic loads and ride quality parameters of a self-propelled combine harvester when driving along gravel and bituminous surfaces under various operating conditions are presented based on complex experimental studies carried out with the help of tensor and vibrometry methods. The method and conditions of measurements are given. On the basis of the experimental studies, the acceleration spectrum on the main parts of the combine harvester are presented and their description is given. Using the methods of spectral analysis and statistical processing, a vibration modal analysis has been carried out during a combine harvester movement. According to the results of the analysis, the basic vibrational modes have been determined, and it has been shown that the self-propelled combine harvester movement dynamics is determined by vertical and longitudinal-angular vibrations of its core on pneumatic tires. Further scientific research directions to improve the ride quality and to decrease the dynamic loads on a considered class of self-propelled agricultural machines have been determined.
Management of space orientation of the end effector of generation of geometry system fiveaxis manufacturing machinery for additive generation of geometry
Authors: Grechukhin Alexander N. , Anikutin Ivan S. , Byshkin Alexander S.
Published: November 2018

The article is devoted to the investigation of the surface layer formation accuracy of engineering products by additive methods. The analysis of advantages and disadvantages of layered products synthesis technologies was carried out. It was revealed that, in additive shaping, the exact characteristics of the surface layer differ significantly from the accuracy characteristics of the surface layer of products obtained by the traditional methods. The analysis of domestic and foreign works on the topic of research was carried out. It is revealed that to increase the accuracy characteristics of products obtained by additive methods, it is necessary to realize dynamically the spatial orientation of the working element of the additive installation in the process of shaping. To control the spatial orientation of the working organ of additive equipment, a method is proposed. According to the proposed method, the controlled parameters of the additive installation are calculated on the basis of a 5- coordinate mechatronic system. The proposed methodology will allow to calculate the controlled parameters of the process equipment, to provide the required orientation of the working element of the additive installation to reduce the error of shaping (approximation), using 5-coordinate mechatronic system
Evaluation of tribological properties of components of polymer composite selflubricating materials
Authors: Dolgopolov Kirill N. , Lyubimov Dmitry N.
Published: November 2018

The paper presents data on the anti-wear properties of the basic components of polymer self-lubricating composite materials for heavy loaded friction units. In friction these components are released from the composite structure as a result of destructive processes or physical desorption with increasing temperature and involved in the metal plating of friction parts. Besides, it shows the wear form of a sample friction pair in comparison with I-40 base oil, often applied as a composite plasticizer, on the example of synergistic interference of unhardened epoxy-diane resin with highly dispersed mineral fillers of the serpentine group. The conducted study reveals the ability of minerals to reduce the wear rate of a sample friction pair as a result of the transferred film formation. The kinetic features of model samples wear under special conditions for testing ceramic materials are determined as well. In addition, the paper identifies the practicability to exploit layered silicates in the structure of polymer matrices as lubricating agents of heavy loaded friction units.
Analysis of wet-steam microturbine self-regulation characteristics
Authors: Efimov Nikolai N. , Skubienko Sergei V. , Kopitsa Vadim V. , Stepovoy Dmitry V. , Ovechkin Alexander D. , Baltyan Vasiliy N.
Published: November 2018

The paper analyzes the characteristics of a wet-steam microturbine self-regulation with a constant and variable consumption of a wet steam, depending on the rotor speed of the turbine. The characteristics of self-regulation are the electric power, the consumption load and the torque generated on the microturbine blades. The dependence of electric power on the rotation speed for a wet-steam microturbine with a power of 5 kW is constructed.
Modification of gas-thermal coatings surface by continuous-generation laser radiation
Authors: Chaschin Evgeniy A. , Kurganov Konstantin I. , Mitrofanov Andrey A. , Kharakhashev Andrey H. , Klimov Mikhail M.
Published: November 2018

The results of the researches which determine the dependence of gas-thermal coating porosity on the laser radiation parameters are given in the article. The coatings which are based on the metallic (PN-85-U-15) and non-metallic (Al2O3) components were analyzed. The quantitative assessment of porosity modification were realized by means of the based on Visual Studio 2008 program. This image processing program allows to compare the microstructure of the occupied by pores and coating material areas pixel-by-pixel. It has been established that the action of laser radiation leads to reduction of average porosity of gas-thermal coating. This reduction is: 1. the porosity in the initial position for coating of a PN 85-U-15-based alloy is 17%; after the laser treatment it’s 5-8%; 2.- the porosity in the initial position for ceramic coating of Al2O3is 24,5%; after the laser treatment it’s 15-18%.
Dynamics and rigidity of a manipulator with three DOFs
Authors: Kosbolov Serikbay , Yeleukulov Yerlan , Atalykova Alfiya , Zhauyt Algazy , Yestemessova Gulsara , Yussupova Saltanat
Published: November 2018

The problem of dynamic elastic four-link initial kinematic chain (IKC) of the load-bearing manipulator, which is the basis for various modifications are considered. Using the Lagrange operator for this system, equations of motion in matrix form are obtained. To determine the potential energy of an elastic four-link IKC manipulator, we use the formula for the elastic potential energy of a rectilinear homogeneous rod of length l. The cross-section of the rod is considered annular or circular. Solving the system of linear equations of motion on a computer using the ADAMS program, the results of the movement of links and cargo were obtained. Kinematics and dynamics are presented for a generic 3 DOFs Initial Kinematic Chain; with anthropometric data and the dynamics equations, simulations were performed to understand its behavior.
Optimization of technology for production of products of deep drawing sheet steels with the use of lubricants in universal software system ANSYS workbench
Authors: Shulga Gennady I. , Kolesnichenko Alex O. , Sirotin Paul V. , Lebedyns’kyi Ilya Yu. , Skrynnikov Eugene V. , Vasilyev Maxim A.
Published: November 2018

The techniques and laboratory tests, simulating the technological process of drawing sheet steels with water soluble lubricant PB-18 with a fractal structure, with the addition of nanopowders of copper and bronze. Given optimization of the stretching process of sheet steels using universal software system of finite-element analysis ANSYS Workbench
Synergies in control of the cutting processes
Authors: Zakovorotny Vilor , Gvindjiliya Valery
Published: November 2018

As the rule metal-cutting machine have controllable movements of the executive tool from the computer. However, the shape-generating movements differ from the executive elements movements. These differences are defined by the influence of the deformation of the tool and detail. The deformations are conditioned by complex nonlinear transformation in all system. In turn, the process dynamic system is determined on the basis of the disclosure of the dynamic subsystem interaction. While the dynamic link parameters depend on the trajectories of the executive elements movement. Therefore, it is necessary to agree on the trajectories of the executive elements and the cutting dynamic properties. Agreement characterize the synergies of the external control with the internal links, it characterize the next stage of the enhancement of the cutting processing control.
Experimental evaluation of the influence of tool wear on the temperature in the cutting zone during the turning of metals
Authors: Lapshin Viktor P. , Babenko Tatiana S. , Minakov Valentin S. , Kambulov Sergey I.
Published: November 2018

The work is devoted to the questions of experimental estimation of the influence of the degree of the tool wear, during turning of metals in metal-cutting machines, on the level of thermal energy in the contact area of the tool with the workpiece. In the work, the experimental method revealed that with the increasing of the tool wear along the back face, the power of the released thermal energy in the contact zone of the tool and the machined part increases. This is associated with an increase in the power of irreversible pre-formations in the contact area of the tool with the workpiece, the result of which is the growth of energy consumption and the growth of conversion of this energy into thermal energy in the contact zone. The main conclusion on the work can be a conclusion about the repetition of the appearance of the dependence of the level of thermal energy in the cutting zone on time, the graph of the dependence of the degree of deterioration of the instrument on time. Proceeding from this, we can talk about the possibility of linear interpolation of the heat level from the degree of wear during the synthesis of mathematical models of the processes accompanying the cutting of metals in metal cutting machines. From the point of view of a possible explanation of this connection, it can be that with the increase of the tool wear, the capacity of irreversible transformations in the workpiece and in the tool itself grows, and the result of the growth of this capacity is the increase in the power of the heat released during processing.
Development of the principles of mathematical modelling and management of behaviour of fine dust fractions of various nature in non-uniform electric field
Authors: Minkin Maksim , Kuimov Denis
Published: November 2018

The main fundamental objective of this work is the research of behaviour of fine dust fractions (aerosols) of various nature in non-uniform electric field (the crown category) in the conditions of action of electric, gravitational, aerodynamic and other indignations. Determination of the fundamental principles and also development of methods of management of particles of fine fraction with the set physical characteristics will allow to develop adequate mathematical behaviour models of aerosols in nonuniform electric field. In the real work mathematical modelling of electrostatic field in the device is described and the mathematical model is presented. The analysis of physical processes in the device of blocking of dust emissions – “an electrostatic lock” taking into account influence of Aerodynamic effort is carried out from such phenomenon as “Ionic wind”.
Effect of the molecular weight of polyvinylpyrrolidone on the structure and morphology of materials based on substituted hydroxyapatite for bone implants
Authors: Mukhanova Elizaveta A. , Suprunova Inna A. , Suprunova Yana A. , Zabiyaka Igor Yu.
Published: November 2018

In this work, we study the influence of various molecular weights of polyvinylpyrrolidone (PVP) on synthesis substituted hydroxyapatite. Using the scanning electron microscopy we estimated the size and morphology of the particle. We studied the structural transformations of phosphates and the effect of polymer sizes on the structure and morphology. We revealed the thermodynamic stability of the structure of hydroxyapatite due to experimental results.
On the design of electromagnetic actuators with increased vibration resistance and low vibration activity for the mechatronic devices of autonomous transport systems
Authors: Bolshenko Irina A. , Pavlenko Alexandr V. , Gil’miyarov Konstantin R. , Gummel Andrey A.
Published: November 2018

The questions of complex designing of electromagnetic actuators, with increased resistance to external mechanical influences and low vibration activity, focused on the use of transport systems in mechatronic devices are considered. As a determining direction for creating actuators with increased vibration resistance and low vibration activity, the direction of realization of electromagnetic mechanisms with an adaptive control system that controls external mechanical influences and vibronoise parameters of the device is proposed. A complex mathematical model describing electromechanical processes in an electromagnetic actuator, that takes into account the influence of external factors, is considered. Based on the studies, three adaptive control algorithms are proposed, differing in the way they determine the current value of the speed and position of the lifter. The proposed algorithms are implemented experimentally, have shown good stability and efficiency.
Analysis of methodological approaches and de-velopment of principles for describing properties characterizing the dynamics of the emission and spreading of toxic components of plants of the fuel and energy complex
Authors: Bespalov Vadim , Gurova Oxana , Volodina Marina , Alekseenko Lydmila
Published: November 2018

The article gives a complete description of the pollutants properties and their behavior patterns based on studies considering the peculiarities of a continuous medium, on the one hand, and a set of discrete particles of different sizes, on the other. For that purpose, the authors used the theory of disperse systems, based on the classical concepts of colloidal and physical chemistry. The article presents the methodology developed by the authors to generalize, systemize and describe the properties and behaviour patterns of toxic components of exhaust gases from public and domestic power units, power plants, and exhaust gases from mobile power units for the dynamic conditions for their formation and spreading in the air basin of urban areas. It allows controlling the behavior of toxic components of exhaust gases in order to reduce air pollution and ensure the environmental safety in the builtup areas.
Study of the object of the natural-technical system and determination of the static characteristics of ventilation
Authors: Bosikov Igor I. , Klyuev Roman V. , Dzeranov Boris V. , Tekiev Marat V.
Published: November 2018

The article describes the analysis of the operation of existing production facilities for the extraction and processing of deposits. The study of the effective functioning of the natural-technical system in the extraction of a useful component of deposits is an extremely urgent and promising task. The purpose of the research is to study the object of the natural-technical system and determine the type of static ventilation characteristics. The tasks will be solved on the basis of a comprehensive study of the object of the natural-technical system. Experimental data necessary for constructing static characteristics associated with conducting a special experiment on the production site that violates the normal mode of ventilation is obtained. The research and development of a method for determining the static characteristics of ventilation objects, according to normal operation, which are obtained without interrupting the technological process of extracting the useful component.
Agricultural machine parts quality control by dynamic non-destructive methods
Authors: Beskopylny Alexey N. , Rykov Viktor B. , Zubrilina Elena M. , Chistyakov Andrey D.
Published: November 2018

The problem of quality control of agricultural machinery parts by means of dynamic non-destructive methods of impact indentation of conical shape indenters is considered. Quality of the crucial parts is considered from the point of view of a set of mechanical characteristics that determine the strength, hardness, wear resistance and deformability. These characteristics must be known and be able to control on all the details promptly and accurately both in the manufacturing process and in operation. The mechanical characteristics of metals are stochastic in nature. For this purpose, an impact indentation device was developed, and the method based on probabilistic laws of dispersion of mechanical characteristics is obtained.
Methods of substitution detected anomalous values in the realization of a random process
Authors: Marchuk Vladimir I. , Chernyshov Dmitriy Y.
Published: November 2018

The paper considers a proposed method of detecting anomalous values in the realization of a random process in case of a limited amount of a priori information about the statistical characteristics of the noise component. A new approach is proposed to replace the detected anomalous values, which does not introduce a correlation relation into the results of the output pro-cessed random process.
Gastric carcinoma with a gastrointestinal stromal tumor
Authors: Liu Sen , Liu Hongyu , Dong Yunlong , Wang Fengbiao , Wang Huijuan , Chen Jun
Published: November 2018

Gastric carcinoma (GC) with gastrointestinal stromal tumor (GIST) is encountered very rarely in the clinic, and few cases have been reported in the literature. Here, we present a case involving a 72-year-old man who was diagnosed with gastric antrum adenocarcinoma accompanied by neuroendocrine differentiation and a GIST in the fundus, according to a preoperative examination and postoperative pathology. The patient then underwent a distal radical gastrectomy and GIST resection. After the operation, the patient was administered combined chemo-radiotherapy and subsequently underwent a 9-month follow-up examination. The gene mutations involved in this case were explored via high-throughput sequencing. The high-throughput gene mutation analysis indicated an exon5 mutation in the TP53 gene and copy number amplification of FGF19, CCND1, and FGFR2 in the gastric antrum adenocarcinoma. A gene sequencing analysis of the gastric fundus stromal tumor demonstrated an exon11 non-frame shift deletion mutation in the KIT gene. These findings suggested that this patient’s cancer might be sensitive to AZD1775 (a TP53-targeted drug) or targeted drugs such as FGF19, CCND1 and FGFR2, and should be sensitive to imatinib.