bluuebunny/crossref_metadata_2025_split huggingface dataset:
Change the state of 2D nanofilms under the substrate influence
Authors: Belim S V , Tikhomirov I V 
Published: March 2022

Abstract
2D films deformations under action of ferroelectric substrate by computer modeling method are performed in article. The film has a square lattice. We use harmonic law for the energy of interatomic interaction. The substrate effect on the film is simulated by the 2D Frenkel-Kontorova potential. The orientation of the film and the substrate do not match. Different cases for periods of film and substrate are considered. The Monte Carlo method is used for computer modeling. If the period of the film and the substrate coincide, the film atoms are placed at the minimum points of the substrate. The film on the substrate has a square crystal lattice. If the period of the substrate is less than the period of the film, the continuous film is converted into a film 2D nanoparticles. The substrate potential amplitude affects the filling of the space between particles. If the period of the substrate is longer than the period of the film, a superstructure in the form of a periodic lattice with an increased particle concentration is formed in the film. The distribution of atoms in the superstructure is determined by the substrate potential amplitude of the substrate potential.
Structure and phase composition of electrically conductive carbon black
Authors: Kropotin O V , Nesov S N , Polonyankin D A , Drozdova E A 
Published: March 2022

Abstract
A comprehensive study of the structure and phase composition of a promising brand of electrically conductive carbon black was carried out. It is shown that the material under study has a complex phase composition, which, along with carbon, includes other elements and compounds, such as sulphur, oxygen, nitrogen, and vanadium oxides. The structural state of carbon black can be defined as amorphous. The presence of functional oxygen-containing groups in the material, presumably attached to the edge carbon atoms of graphene layers, has been proved. The interrelation of some characteristics of the structure and phase composition of the material and the properties of polymer composites is discussed.
Optimal parameters for selective laser melting of various steel powders
Authors: Shakirov I V , Markova Yu M , Anisimov D M 
Published: March 2022

Abstract
The data of mechanical testing of samples manufactured by selective laser melting of powders using the EOSINT M270 unit is systematized. Used powder raw materials of a different chemical composition close to common stainless-steel brands. Melting parameters found to obtain a complex of mechanical properties exceeding the characteristics of monolithic samples.
Microstructure of spherical granules based on hydroxyapatite and wollastonite
Authors: Solonenko A P , Chikanova E S , Shevchenko A E , Polonyankin D A 
Published: March 2022

Abstract
Spherical granules are one of the preferred forms of biomaterials for bone defects healing. Chemical composition and microstructure of these materials are largely determines their behavior in vivo. Synthesis and properties investigation of polydispersed porous composite granular materials containing several bioactive components are the important task of modern biomedical chemistry. In this work, the microstructure of organomineral granules based on hydroxyapatite, wollastonite, and gelatine, and the products of their calcination were studied. It was found that as a result of removal of the polymer binder from the ceramic particles surface, nanopores were disclosed, and the subsequent crystallites sintering provide the granules shape stability.
Structural studies of samples manufactured by selective laser melting of the Fe-based powder
Authors: Zhukov A S , Vasilyeva E A , Staritsyn M V , Lebedeva N V , Barakhtin B K 
Published: March 2022

Abstract
In the structure of the samples manufactured by the additive method of selective laser melting (SLM) of the Fe-based powder, particles were detected with a minimum size of 0.15 ± 0.05 μm, which were interpreted as germ objects of solidification. The model of additive samples hardening by nanoparticles was proposed, which were formed in the process of desublimations (condensation of metal vapors + crystallization) in the sequence: Metastable state to Segregation to Cluster to Nano-object.
Improved method for measuring the electric field strength by the mean value of double sensors and devices for its application
Authors: Biryukov S V , Tyukin A V , Tyukina L V , Kolmogorova S S 
Published: March 2022

Abstract
The article reviews the method of measuring the electric field strength by the average value. Its advantages and disadvantages are discovered. Taking into account the identified disadvantages an improved method using a dual sensor and a built-in measuring and computing device, which allows to directly obtain the result of measuring the electric field strength, is proposed. To carry out the improved method of measurement in the devices for measuring the electric field strength, various types of electric induction sensors are considered from the position of minimum error and suitability for the improved method, of which dual sensors are selected. The use of dual sensors and the improved method in the proposed devices for measuring the electric field strength makes it possible to reduce the measurement error to +- (2-5) %. The designed devices for measuring the electric field strength allow obtaining the measurement result in the form of an equivalent of the electric field strength of a point charge.
The best sensitive single-coordinate interference jet-drop measurement of electric field strength
Authors: Leun E V 
Published: March 2022

Abstract
The article discusses the features of the implementation of highly sensitive single-coordinate measurements of electric field strength (EFS) by using of jet-drop optical measuring systems (JDOMS). The use of moving monodisperse charged droplets of a jet-drop coherent flow, which acquire a displacement depending on the directions of movement, the level of the EFS and of the droplet charge, is discussed. The issues of implementation of stroboscopic interference measurements of droplet displacements under impulsed illumination of their surfaces, used as curved reflectors, are considered in JDOMS. It is shown that measuring the displacements of the reflected oh drop of the laser beam makes it possible to determine the displacements of the reflecting drop and the value of the EFS at the selected coordinate, respectively. The features of the use of liquids with pigments and additives in the form of nanopowders of highly reflective metals, liquid metals (or their alloys) with a low melting point are considered in the JDOMS.
Steganalysis for DCT inserts with the Koch-Zhao steganographic method in low stego-payload images
Authors: Vilkhovskiy D E 
Published: March 2022

Abstract
This study focuses on the problem of detecting and locating secret data embedded using the Koch-Zhao steganographic method with discrete embedding. The proposed method of steganalysis is based on discrete cosine transform and enables to control and verify JPEG and MPEG images of stego-payload not exceeding 25%. Mid-frequency components are considered as the components targeted by the Koch-Zhao steganographic method. The proposed method of steganalysis delivers strong detection and locating accuracy and performs in 10-% stego-payload cases with sufficient reliability. Both gray-scale and color images can be verified on being a carrier or not being when using the detecting method proposed in the study.
Advances of the Research Department on Physicochemical and Electrical Measurements of FSUE "VNIIFTRI"
Authors: Dobrovolskiy V I , Oganyan N G 
Published: March 2022

Abstract
It is hard to imagine the development of the country's economy without constant development and improvement of its base of standards in order to ensure the uniformity of measurements both in a particular country and at the global level. For this purpose, there are four state metrological institutes with branches in Russia.
The Research Department on Physicochemical and Electrical Measurements is a structural subdivision of The Federal State Unitary Enterprise «Russian Metrological Institute of Technical Physics and Radio Engineering». The activity of the Research Department is related to the measurement of pH, pX, inorganic components in liquids, with measurements of the parameters of particles in various matrices, gases dissolved in a liquid, such as oxygen, hydrogen, carbon dioxide, measurements of the parameters of air ions, etc. Scientists of the Research Department conducting research to develop the certified reference materials in order to establish the measurement traceability to the Russian Primary Standards, to the calibration and measurement capabilities of metrology institutes at the database of key comparisons of the International Bureau of Weights and Measures.
The Research Department is constantly working to expand its capabilities for metrological support of industry and scientific research in the Russian Federation on the topics assigned to the institute, is actively working to improve its reference base, participates in technical committees and working groups of regional and international organizations related to metrology. Takes an active part in international and Russian conferences and seminars, round tables and discussions.
This paper describes the achievements of the Research Department over the past two years.
International comparisons on organic analysis. The main achievements and development perspectives
Authors: Mikheeva Alena Yu , Krylov Anatoliy I 
Published: March 2022

Abstract
International comparisons in organic analysis (OA) are organized and coordinated by the Organic Analysis Working Group (OAWG) of the Consultative Committee for Amount of Substance (CCQM). OAWG also performs strategic planning and highlights the focus areas and challenges in OA. Realizing well that the amount of organic compounds and potential combinations of analyte-matrix is numerous, the OAWG has developed a systematic approach to the comparisons organizing. This approach allows to comprehensively describe the specifics of each comparison and appropriate features combination allows to cover all relevant aspects of OA. In terms of CMCs submission, recently the new concept has been created suggesting a broader view on the NMIs competence – it is the concept of “Broad Scope Claims” (BCs). BCs allow NMIs to submit CMCs for a wider range of analytes and matrices. In 2021 the OAWG has highlighted the priority areas for activities and promising methods and technologies for the OA for the period up to 2030.
In international comparisons on OA Russia is represented by VNIIM. Since 1998 VNIIM has been taking part in more than 35 comparisons covering various aspects of OA. Each successful comparison is a real and documented confirmation of Russia competence in the relevant OA area. At the moment 89 CMCs are presented in the Database, including 25 BCs.
Bottom-up evaluation of complex measurements in chemistry by the Monte Carlo simulation of sample preparation
Authors: Bettencourt da Silva R , Morgado V , Palma C 
Published: March 2022

Abstract
The measurement uncertainty is required for the objective and sound interpretation of the measurement result. However, the evaluation of the uncertainty of complex measurements in chemistry, such as for the analysis of trace levels of analytes in environmental or biological samples after complex sample preparation, is not trivial. Some examples of complex sample preparations are acid digestions of the sample for the elemental analysis or the solvent extraction of organic analytes. This communication presents a novel approach for the “subanalytical” evaluation of complex sample preparation that involves the isolation and the Monte Carlo Method simulation of the precision and trueness of the analytical steps. The simulation is based on observed experimental performance since the analytical efficiency frequently varies with uncontrolled characteristics of the analysed item.
Metrological Assurance of Infrared Transillumination of Biological Tissues
Authors: Kolpakov Alexander V , Muravskaya Natalya P 
Published: March 2022

Abstract
The article is devoted to the urgent scientific and technical problem of developing metrological assurance for hardware and software infrared transillumination systems designed to visualize the internal structure of biological tissues in order to detect early stages, measure and control the dynamics of pathological processes. As part of solving this problem, at the Department of Biomedical Technical Systems of the Bauman Moscow State Technical University a set of measures that simulate the optical properties of biological tissues, containing local optical in homogeneities was developed. Experimental studies were carried out using the developed measures, as a result of which the possibility of visualizing the structural in homogeneities of biological tissues using the method of infrared transillumination was shown. The approved method for the manufacture of measures can be used to simulate the optical properties of biological tissues in the course of subsequent studies and further stages of the development of metrological assurance for hardware and software complexes of infrared transillumination.
Metrology of cellular analysis: problems and solutions
Authors: Runov A L , Shevchenko N N , Goryachaya T S , Kurchakova E V , Vonsky M S 
Published: March 2022

Abstract
Cellular analysis is one of the perspective developing areas of metrology. The complexity of the measuring object requires novel approaches and correct metrological support for the quantitative methods of cellular analysis. Definition of the quantitative parameters and nominal properties of the cell, standardization of methodology – these are main tasks of the Cellular Analysis Working Group of the Consultative Committee for Amount of Substance: Metrology in Chemistry and Biology. The results of a number of pilot studies carried out by Working Group can be used as a first step establishing metrological traceability of the cell measurements. Development of the stable reference materials for cell quantification is a challenging problem. One of the promising solutions seems to apply synthetic cell-mimicking particles. Currently we are in the process of developing candidate synthetic reference materials for cell measurements.
Improvement of methods and means of measuring the content of toxicants in biological objects
Authors: Vikhrova S V , Rutenberg O L , Smirnov A V , Petukhov A E , Barinskaya T O 
Published: March 2022

Abstract
The results of the development of a reference procedure for measuring the content of toxicants in biological objects are considered. To ensure traceability to the state primary standard, two types of certified reference materials of aqueous solutions of propanol-1 and propanol-2 have been developed, manufactured and approved. The mass spectra of narcotic psychotropic and psychoactive medicinal substances with fixed retention times were investigated. Mass spectra tables have been approval as standard reference data.
Risks of false decisions on conformity of a sausage with a mass balance constraint
Authors: Kuselman I. , Pennecchi F.R. , Hibbert D.B. , Semenova A.A. 
Published: March 2022

Abstract
A technique for evaluation of risks in a sausage conformity assessment is developed. Measurement uncertainty, correlation and mass balance constraint are considered. A multivariate Bayesian approach and a Monte Carlo method are applied. Risks in assessment of sausage "Braunschweigskaya" are evaluated as a case study. R code for the risk evaluation is provided as electronic supplementary material.
Application of the electronic paramagnetic resonance method for detecting radiation-processed food products
Authors: Kuvykina Maria , Pryadka Alexey , Tenishev Vladimir , Gorskiy Andrey , Aprelev Alexey 
Published: March 2022

Abstract
This paper presents the results of work on studying the capabilities of EPR spectroscopy for identifying certain types of food products treated with ionizing radiation at various doses, determining the dose and time elapsed since the product was treated with ionizing radiation. The samples were examined for 270 days. For the prepared samples, the post-effect of irradiation with ionizing radiation was studied, which manifested itself in a change in the number of paramagnetic centers in the sample.
Practical Aspects of Calibration of Airborne Particle Counters According to ISO 21501-4 Standard
Authors: Kovbasyuk I Ye , Maslakov O Yu , Shakhov M N 
Published: March 2022

Abstract
The article reviews the practical aspects of calibration of airborne particle counters according to GOST R ISO 21501-4 (Russian equivalent of the international ISO 21501-4) standard. The authors share their gained experience and explain what difficulties can be faced during the procedure described in the standard, how to avoid and how to revise them. The article may be useful for specialists as an introduction to the standard or for particle counters’ users who want to learn more about practical metrology aspects of these devices without going into the specifics and the basis.
Prospects for the development of means for measuring the mass concentration of aerosol particles in the Russian Federation
Authors: Belenkii D I , Magomedov T M , Balakhanov D M 
Published: March 2022

Abstract
The paper describes the state of affairs in the field of ensuring the uniformity of measurements of the mass concentration of aerosol particles in the Russian Federation. The definition of indicative measurements is given and the world experience in the use of indicators in environmental monitoring networks is described. The necessity of adopting relevant regulatory documents in the Russian Federation in order to introduce the concept of "indicative measurements" is shown.
The problems associated with monitoring of main parameters of working areas and technological environments in high technology industry
Authors: Balakhanov M V , Balakhanov D M , Belenkii D I 
Published: March 2022

Abstract
Today, the matters of ensuring the safety of human life in a polluted environment, quality control of agricultural raw materials, food and the parameters of various environments is becoming increasingly urgent, especially in connection with the development of nanotechnology and nanoindustry. Therefore, high-precision measurements of aerosol parameters and the metrology of air weights are directly connected with the global problem of monitoring the safety of the use of nanotechnology. Since it’s been created the Russian State Primary Standard - GET 163 was modified two times to support the demanded measurement accuracy in this area in Russia. The standard has reproduced, maintained and transferred values of units of particle size, number particle concentration, mass concentration of aerosol particles, and, since 2020, units of electrophoretic mobility and zeta potential of particles in liquid media
Optimization of Geomagnetic and Solar Reference Vector Algorithms for Micro-Nano Satellites
Authors: Ye Jingyu , Xia Guangqing , Yu Xiaozhou , Zhong Xing , Hu Xin , Pu Lingjuan , Li Luping 
Published: March 2022

Abstract
To optimize the geomagnetic reference vector and the solar reference vector calculation method, this paper proposes a geomagnetic fitting algorithm and simplifies the DE430 ephemeris structure to speed up the determination rate of the geomagnetic and solar reference vectors. The two optimized reference vector determination methods are simulated on the Attitude Measurement Unit (AMU). The simulation results show that the single-step elapsed time of the geomagnetic fitting algorithm is reduced by 99.5% compared with the IGRF-13 geomagnetic model algorithm, and the data capacity is reduced by 97.3% compared with the look-up table method. The data capacity of the simplified ephemeris algorithm is 66.9% lower than that of the DE430 ephemeris algorithm, and the calculation accuracy is nearly 3 orders of magnitude higher than that of the approximate calculation method. This method can significantly shorten the attitude determination time and increase the attitude determination frequency, dramatically improving attitude determination accuracy and attitude control accuracy. The AMU supported by these two algorithms has sound engineering practical value.
Fast convex optimization of vehicle trajectories based on improved trust domain
Authors: Li Jin , Wang Yudong , Zhao Liangbo 
Published: March 2022

Abstract
The re-entry process of lift vehicles faces a variety of complex constraints and path limitations, so fast and accurate trajectory optimization for them is an important topic. This paper proposes a fast trajectory generation method based on improved sequential convex optimization, which simplifies the equations of motion with energy as the independent variable, takes the sine and cosine function of the bank angle as the control variable, and convexities multiple constraints to obtain a computational model that satisfies the optimization conditions. On this basis, the "jitter" phenomenon, which is easy to occur in the optimization process, is improved, and the method of variable trust domain and weight function is proposed to reduce the jump problem in the iterative process, and also to improve the terminal accuracy requirement. Finally, numerical simulations show that the algorithm can efficiently and rapidly solve the re-entry trajectory optimization problem under the inclusion of no-fly zone.
Research on the Particular Risk Analysis Model of Sustained Engine Imbalance on Civil Aircraft
Authors: Yang Tielian 
Published: March 2022

Abstract
In order to demonstrate the aircraft continued safe flight and landing after fan blade out (FBO), Sustained Engine Imbalance Particular Risk Analysis, as part of the civil aircraft safety assessment, is seriously required to implement. Under the guidance of AC25-24 “Sustained Engine Imbalance”, the specific analysis model are given, combined with engineering application experience on civil aircraft development and certification. The model and methods presented herein provide a valid approach and guidance for safety design requirements capturing in aircraft design and certification demonstration regarding Sustained Engine Imbalance.
Ballistic Coefficient Estimation Based on ODTK
Authors: Huang Xiaobin , Zhang Yan , Lu Li , Xiao Rui , OuYang Yan , Shi Binbin 
Published: March 2022

Abstract
Accurate ballistic coefficients play an important role in orbit determination and target recognition of space targets. In order to quickly and effectively calculate the target’s ballistic coefficient, AGI's ODTK (Orbit Determination Tool Kit) software is introduced, detailed operation steps and parameter settings are designed, and simulation is build to verify the effectiveness of executing the task of ballistic coefficient estimation by the ODTK software. The results of this paper have reference value for researchers engaged in space target surveillance.
The Solution to galaxy rotation curve problem——Dark matter and MOND
Authors: Pan Zian 
Published: March 2022

Abstract
In 1932, Dutch astronomer Jan Hendrik Oort examed the Doppler shifts in the spectra of stars in the Milky Way Galaxy and first found that the stars moved faster than expected. Then people began to think and argue why that happen. Some people thought maybe the Newton’s law was only useful in the solar system. And someone thought there may be some matters that cannot be seen. Now there are two different hypotheses to explain this situation, Modified Newtonian dynamics (MOND) and Dark Matter. This paper will introduce the origin of these two hypotheses and the evidence supporting these hypotheses. The paper will also compare and contrast three different models to show the existence of dark matter.