bluuebunny/crossref_metadata_2025_split huggingface dataset:
Features of concrete creep numerical modeling in the calculation of building structures
Authors: Sidorov V N , Nowak K 
Published: November 2019

Abstract
The paper presents a study and justification of the concrete creep computational model for use in computer calculations of concrete and reinforced concrete structures of arbitrary complexity, with a possible change in the intensity of the current load over time. The computational model is based on the generalized Maxwell-Wiechert model of the viscoelastic material. The model was verified on the basis of data from experimental studies of concrete creep, was justified and calibrated in accordance with the requirements of regulatory documents for calculations of concrete and reinforced concrete structures, taking into account the material creep. The paper focuses on the situation where the creep of the material leads to a dangerous change in the structural scheme of a building, which in turn can cause its destruction. Verification of the creep computational model and calculation of structures using the selected computational model was carried out in the SIMULIA Abaqus software environment.
Formation of architectural objects for extreme habitat conditions in the context of innovative paradigms
Authors: Saprykina N A 
Published: November 2019

Abstract
Article is devoted to an actual problem of defining features of architectural objects and their construction for extreme habitat conditions in the context of innovative paradigms. The purpose of article is to consider approaches to dealing with the creation of the artificial habitat environment for extreme conditions, uses to ensure the safety of the existence of technological innovation of the future. It has been established that depending on natural conditions distinguish areas of very extreme conditions, requiring the need to protect the person from the surrounding aggressive environment. A leading approach to the study of the problem based on the search for new, including innovative solutions, home and life-support systems, making full use of technical innovation and creative development of advanced technologies. As a result of research defined the features of construction for each extreme region, and also identify specific requirements for the design of artificial environment. Materials can be useful to the theory and practice of forming the space habitat not only for extreme, but for normal conditions as opens completely new possibilities in architecture and construction.
Protection of pipeline systems from water hammer using oscillatory circuits
Authors: Rekach F V , Shambina S L , Belousov Yu V 
Published: November 2019

Abstract
The issues related to reduction of the amplitude of high pressure waves in long pipes are relevant in connection with the danger of failure of some hydraulic system’s sections. The article deals with the reduction of high pressure by simultaneous separation of fluid flow for long hydraulic systems. Numerical experiments are carried out in order to identify the most cost-effective dimensions of the equipment, as well as the most profitable in terms of energy damping locations of this equipment.
New data on mineral complexes of the Turgoyak limestone deposit (South Ural)
Authors: Georgievskiy A F , Bugina V M , Yu Rogova O , Georgievskiy A A 
Published: November 2019

Abstract
The main purpose of the research was to ascertain additional development potential of the oldest mining plant in the Southern Urals - the Turgoyak limestone deposit (Miass District, Chelyabinsk region, South Ural). An additional site dike survey work and mineral veins enclosed in carbonate rock strata and overlapping Low Devonian jasperoid rock was carried out. The main purpose of that exploration was a detailed study of the chemical and mineral composition of both dikes and host rock and their secondary alterations. In addition to photographic documentation and mapping, an interrelation between dikes and veins and theirs contacts was determined. Also the connection with them of newly formed sulfide and other secondary minerals was detected (recorded). Subsequently rock and mineral samples were analyzed by microscopic methods, X-ray diffraction and X-ray phase analysis, X-ray fluorescence analysis by RLP-3-01 device, a DRON-7 diffractometer, and a DELTA Premium portable spectrometer. Those investigations resulted in establishment of silicate and calcareous skarns, spatially associated with diabase dikes at the Turgoyak flux limestone deposit. In addition to the skarns, vein polymineral bodies were recorded there. The most interesting of those are carbonate-quartz-axinitic and axinitic ones. The veins of this composition contain superimposed post-skarn sulfide mineralization, with signs of increased gold content. Given the development at the deposit of the dyke complex and the skarns forming on it, it is possible to forecast the existence of a granitoid intrusion in deep horizons that can generate industrial ore mineralization.
The effect of cyclic heat treatment on the structure of 5140 steel after cold plastic deformation
Authors: Yu Malkova M , Zadiranov A N , Abu-Mahadi M I , Dkhar P 
Published: November 2019

Abstract
The objective of this work are experimental research of steel 5140 damages appearance under cold plastic deformation and healing continuity defects characteristic study by following periodic heat treatment. The experimental research of deformation defects continuity appearance in steel 5140 with the granular and lamellar perlit under cold plastic deformation in dependence to original structure was conducted. The deformation defects appearance pattern in steel, their growth in dependence to degree of deformation, microstructure and capacity for healing in the process of cold forging are seemed to be pertinent are explored. It was concluded, that at early deformation stages independently of perlit morphology in steel 5140 the damage is related to micropore appearance in ferrite. The possibility of defects healing by periodic heat treatment is found out. For damage changes studying in the process of cold plastic deformation and healing heat treatment the following experimental design was used: the preliminary periodic heat treatment – deformation with varying degrees – healing periodic heat treatment – deformation up to failure. The periodic heat treatment with phase recrystallization is shown to bring about more full healing damages in comparison with recrystallization annealing. Herewith the microdefects critical size increases up to 2 micrometers, and invertible damage stage extend to 0.4.
The effects of operational thermal cycling on mechanical and magnetic properties of structural steels
Authors: Zaya Kyaw , Paing Thet , Kornilova A V 
Published: November 2019

Abstract
This article shows the experimental results of the operational thermal cycling modeling of structural carbon steels with temperature range from the point of phase transition of type II cementite to the beginning of phase transformations of steel. In this study the influence of temperature that the number of thermal cycles and the histogram of temperature loading on the magnetic and mechanical properties of the steels were investigated. The possibilities of controlling the residual life of the elements, which are subjected to thermal cycling on changing the magnetic properties of metal, were determined. The functional dependence of the coercive force and hardness on the number of thermal cycles at a given temperature is obtained.
Effective sound-absorbing material for transport technological machines of railway transport
Authors: Popova I , Leonteva L , Danilov I 
Published: November 2019

Abstract
The article discusses the types and features of the operation of transport technological machines of the railways of the Russian Federation on the example of the most frequently used track machines, and presents methods for noise reducing on the railways of the Russian Federation. The most effective method to reduce the noise arising during the operation of track machines is identified - this is the installation of a steel soundproofing hood (casing) over the electric motor. The calculation of the effectiveness of sound-absorbing materials used for cladding steel bonnet is given. According to the results of the calculation, the material «asbestos felt» turned out to be the most effective, but the other materials under consideration, and in particular, «glass wool», «mineral wool» and «construction felt», turned out to be also applicable to the lining of the steel bonnet, since the calculations revealed the applicable level of sound absorption, which is less than a decibel in terms of noise reduction to the material «asbestos felt».
Optimization of work of urban passenger transport
Authors: Popova I , Abdulina E , Danilov Yu , Danilov I 
Published: November 2019

Abstract
Recommendations for improving the organization of the logistics system of urban passenger traffic based on the formation of adaptive properties proposed. Definitions of organization and lack of organization of the system, target entropy, orderliness, disorder are considered. The calculation of these indicators allows us to conclude how the company is adapted to the external environment. An important feature of all production systems is the focus of their functioning. If such a system is functioning, it means, first of all, that it solves a finite set of tasks to ensure the adaptability of the urban passenger traffic management system to the flow of passengers and with a certain accuracy the goals of organization and management, of which there is also a finite set. The authors come to a fair conclusion that the lack of organization of functioning is a consequence of the influence of the external environment on the control object, while organization is a quantitative measure of the ability of the system to adapt to the effects of environmental factors. The indicator of organization can be proposed as a criterion that assesses the efficiency of the urban passenger transport system. The worse the internal structures are organized, the less efficiently the control system works and the more mobile and uncertain the external environment, the greater the discrepancy between the goal and the final result.
Thermodynamic modeling of a heat pump unit as part of a cogeneration turbine operating in ventilation mode
Authors: Souri K , Antipov Y A , Shkarin K V 
Published: November 2019

Abstract
Currently, much attention is paid to improving the efficiency of energy generating facilities through the use of secondary energy resources. This article presented a cogeneration turbine in the general energy scheme with a heat pump installation. During the winter period, due to the increased consumption of heat energy, heat-generating turbines, by closing the regulating diaphragm, are switched to full steam extraction mode from the low-pressure flow part to heat the supply water. In this case, the last stages of the turbine are transferred to the ventilation mode with the release of heat due to the vortex flows on the blades of the low pressure part. In order to obtain additional heat energy for network water, the article considers the option of using secondary energy resources with the help of a heat pump unit operating in a steam turbine plant scheme. All necessary calculations of thermodynamic modeling were carried out according to the EES heat pump, the program working as part of a cogeneration turbine, and the results were obtained of increasing the efficiency of using secondary energy resources with various refrigerants.
Magnetization modes modelling and analysis for controlled reactors with a rotating field
Authors: Zabudskiy E I , Balandina G I 
Published: November 2019

Abstract
Electromagnetic reactors are used to carry out practical tasks of automatic control of power lines operation modes, distribution grids and energy supply systems of the industrial enterprises. The reactors’ characteristics significantly depend on the harmonic’s manifestation magnetic field saturation, which is different in the magnetization modes of reactors: forced, free and symmetrical. For the purpose of their analysis, a generalized mathematical model of the cross-sectional magnetic circuits of static ferromagnetic devices with rotating magnetic field has been developed on the base of nonlinear magnetic circuits theories. It was found that the best mode is symmetric magnetization, characterized by the following advantages: an increased range of reactive power control, enhanced stabilizing effect on the controlled current, reduced losses in steel, increased speed and the absence of “shaking” vibrations of the reactor magnetic core. It is shown that the free magnetization mode is close in its merits to the symmetric magnetization mode.
Accounting for physically nonlinear deformation of the shell under flat loading based on the finite element method
Authors: Sh Dzhabrailov A , Klochkov Yu V , Nikolaev A P 
Published: November 2019

Abstract
On the basis of the theory of small elastic plastic deformations obtained at the loading step in the curvilinear coordinate system of the relationship between stress increments and strain increments, which are implemented in the matrix of shell stiffness under flat loading In this paper, algorithms for obtaining physically nonlinear relations at the loading step in finite element calculations of shells under flat loading are developed.On the basis of relations of deformation theory of plasticity the equations of connection between increments of stresses and increments of deformations at flat loading in elastic plastic stage of work are received. The coefficients of proportionality are obtained when using the strain diagram of the material. The found defining relations are implemented in the algorithm of forming the stiffness matrix of the finite element of the shell under flat loading. Specific examples show the effectiveness of the developed algorithms for the calculation of the shell with a flat loading beyond the elasticity limits.
Spectral determination of novel methacryloyl guanidine compounds in water solutions
Authors: Tikhomirov V A , Mendeleev D I , Kurenkov V V , Menyashev M R , Sivov N A , Gerasin V A 
Published: November 2019

Abstract
For production and application of novel biocidal guanidine polymer compounds techniques for monitoring the toxic monomer and oligomer components in polymer aqueous solutions are required. A direct spectroscopic method is offered for determination of methacryloyl guanidine salts, polymer and copolymer in water solutions at native pH. The impact of unsubstituted guanidine and methacrylate guanidine contaminants is also discussed. The spectroscopic method offered is simple, rapid and effective for monitoring contamination of polymethacryloylguanidines with toxic monomer components during synthesis of polymers and copolymers from different monomer salts, during dialysis and other manufacturing stages of biocidal polymers.
The choice of dynamic variables in quantum theory
Authors: Samsonenko N V , Ndahayo F , Usman Manga A , Semin M V 
Published: November 2019

Abstract
The influence of various choices of dynamic variables in quantum theory on the interpretation of measurement results and experiments are discussed. Dynamic variables in the generally accepted quantum mechanics have no visual sense, which in turn leads to the loss of the image of the studied phenomena and processes of the microworld. Thus, quantum mechanics forces us to abandon the possibility of even mentally imagining the conditions that determine the behavior of an individual system in a quantum region. Also, various representations of the wave function and their use in solving dynamic equations are shown. By now, quantum mechanics is not a complete theory. It resembles classical (Newtonian) mechanics, which explains how movement occurs as a result of the action of certain forces, but does not say what kind of forces it is. Thus, before the advent of basic theories, the application of quantum mechanics to specific physical problems always implied the need to build certain guesses about the nature of these forces.
Stability of metal cylindrical grid shell structures
Authors: Siyanov A I , Rynkovskaya M , Tupikova E 
Published: November 2019

Abstract
Based on the fundamental thin shell theory applied to thin continuous cylindrical shells, a method for calculating the stability of the corresponding grid shell structures is developed. Mathematical modeling is performed and factors of critical state of structures are determined. Critical deformation zones are identified and the patterns of changes in shell geometry under actual loads are established. The dependencies of strength and shape-forming parameters are obtained depending on the material and the number of half-waves of the stability loss shape. The critical load is determined taking into account the possible rigidity of multi-element grids, and the results of numerical studies are presented. A noticeable difference in the values of critical load is shown and the admissible limits of applicability of geometric parameters are found. A significant sensitivity of shells with a rhombic mesh are noted.
Radiative properties of Tm3+ doped TeO2-ZnO-Na2O-TiO2 glasses studied using Judd-Ofelt Theory
Authors: Marzuki A , Riyatun  , Larasati M , Singgih G T 
Published: November 2019

Abstract
New Tm3+-doped tellurite glasses were prepared by melt quenching technique. X-ray Diffraction (XRD) characterization were carried out to confirm the glassy state of the samples. Characterization using UV-VIS-NIR spectrophotometer and FTIR were performed in order to determine the width of the transparent window, optical band gap and bonding structure of the samples. Density and refractive index were measured at room temperature using pycnometer and Brewster’s angle technique. Utilizing these data, lasing performance of the samples was predicted. For this purpose, the Judd-Ofelt theory was applied to calculate Judd-Ofelt parameters (Ωt
). From these results several radiative transitions were studied in terms of transition probabilities (Ai
), branching ratios (βi
) and radiative lifetime (τ). The predicted results were then compared to that obtained from fluorescence spectra measurement so that quantum efficiency of the samples can be calculated.
Optical Aharonov–Bohm effect due to toroidal moment inspired by general relativity
Authors: Besharat A , Miri M , Nouri-Zonoz M 
Published: November 2019

Abstract
We study the analogy between propagation of light rays in a stationary curved spacetime and in a toroidal (meta-)material. After introducing a novel gravitational analog of the index of refraction of a magneto-electric medium, it is argued that light rays not only feel a Lorentz-like force in a magneto-electric medium due to the non-vanishing curl of the toroidal moment, but also there exists an optical analog of Aharonov–Bohm effect for the rays traveling in a region with a curl-free toroidal moment. Experimental realization of this effect could utilize either a multiferroic material or a toroidal metamaterial.
Nanodevices at terahertz frequency based on 2D materials
Authors: Vitiello Miriam Serena 
Published: November 2019

Abstract
Artificial semiconductor heterostructures played a pivotal role in modern electronic and photonic technologies, providing a highly effective mean for the manipulation and control of carriers, from the visible to the terahertz frequency range. Despite their exceptional versatility, they commonly require challenging epitaxial growth procedures, due to the need of clean and abrupt interfaces, lattice matching or limited and controlled lattice mismatch, which proved to be major obstacles for the development of room-temperature devices, like sources, detectors or modulators, especially in the far-infrared. The discovery of graphene and the related fascinating capabilities have triggered an unprecedented interest in inorganic two-dimensional materials. Layered materials such as graphene, hexagonal boron nitride, transition metal dichalcogenides, and the more recently re-discovered black phosphorus display an exceptional technological potential for engineering nano-electronic and nano-photonic devices and components ‘by design’, offering a unique platform for developing devices with a variety of properties. Here, I review our latest achievements in the design and developments of graphene based nanodetectors, saturable absorbers and near field probes operating across the far-infrared.
Lifting Agent Granuloma
Authors: Westbrook Lindsey M , Henn Patrick A , Cornish Toby C 
Published: November 2019

AbstractObjectivesHistologic findings after endoscopic resection using submucosal lifting agents Eleview and ORISE gel are described.MethodsFour cases were identified based on the histologic presence of ORISE gel. Cases were selected to illustrate the histologic appearance of the lifting agent immediately after injection (day 0) and after an interval of approximately 2 months.ResultsImmediately after injection, the gel had an appearance similar to acellular mucin on H&E stain and showed mucicarmine positivity but was negative for periodic acid-Schiff stain and Alcian blue. At 2 months, the appearance changed drastically and was characterized by a hard, homogenous eosinophilic quality and elicited a robust foreign body-type giant cell reaction; we have proposed the name lifting agent granuloma for this histologic appearance. The aged material may be mistaken for amyloid or a pulse (legume) granuloma; however, the material was negative on Congo red stain and had a different clinical history and distribution in the tissue from those of a pulse granuloma.ConclusionsIt is important to take note of the histologic appearance of these new submucosal lifting agents over a varying time interval, as outlined here, so that they are readily recognized and not mistaken for other entities.
A multiomics approach to heterogeneity in Alzheimer’s disease: focused review and roadmap
Authors: Badhwar AmanPreet , McFall G Peggy , Sapkota Shraddha , Black Sandra E , Chertkow Howard , Duchesne Simon , Masellis Mario , Li Liang , Dixon Roger A , Bellec Pierre 
Published: November 2019

AbstractAetiological and clinical heterogeneity is increasingly recognized as a common characteristic of Alzheimer’s disease and related dementias. This heterogeneity complicates diagnosis, treatment, and the design and testing of new drugs. An important line of research is discovery of multimodal biomarkers that will facilitate the targeting of subpopulations with homogeneous pathophysiological signatures. High-throughput ‘omics’ are unbiased data-driven techniques that probe the complex aetiology of Alzheimer’s disease from multiple levels (e.g. network, cellular, and molecular) and thereby account for pathophysiological heterogeneity in clinical populations. This review focuses on data reduction analyses that identify complementary disease-relevant perturbations for three omics techniques: neuroimaging-based subtypes, metabolomics-derived metabolite panels, and genomics-related polygenic risk scores. Neuroimaging can track accrued neurodegeneration and other sources of network impairments, metabolomics provides a global small-molecule snapshot that is sensitive to ongoing pathological processes, and genomics characterizes relatively invariant genetic risk factors representing key pathways associated with Alzheimer’s disease. Following this focused review, we present a roadmap for assembling these multiomics measurements into a diagnostic tool highly predictive of individual clinical trajectories, to further the goal of personalized medicine in Alzheimer’s disease.