bluuebunny/crossref_metadata_2025_split huggingface dataset:
Energy and moisture in historic masonry walls retrofitted with hemp-lime
Authors: Strandberg-de Bruijn P B , Balksten K 
Published: December 2019

Abstract
Thermally insulating historic buildings is imperative in order to reduce energy demands of the existing building stock. Therefore an insulation material is needed that improves energy efficiency while being compatible with the existing structure from a hygrothermal, aesthetic and cultural heritage perspective. Hemp-lime is a building material that consists of on a combination of hemp shiv, the woody core part of the hemp stem, and building limes. The aim of this study was to determine if hemp-lime could be a feasible option for thermally insulating historic masonry walls in Sweden. The objectives were to measure energy performance of full-scale masonry façades insulated with hemp-lime and to monitor moisture levels inside the masonry walls. Three small single leaf masonry façades were constructed. One façade was uninsulated, the other had internal hemp-lime insulation and a third had external hemp-lime insulation. Energy use for space heating as well as temperature and relative humidity in the walls and rooms were monitored. Results show that thermally insulating historic masonry walls with hemp-lime can lead to an improvement in energy performance of 44-53 % compared to uninsulated single-leaf masonry. However, moisture levels were higher in the masonry façades that were insulated with hemp-lime.
Effect of modified liquid glass on absorption humidity and thermal conductivity of flax fiber slabs
Authors: Romanovskiy S , Bakatovich A 
Published: December 2019

Abstract
Thermal insulation materials based on vegetable fibers are considered. The results of studies on the microstructure of flax fiber noils using a light microscope and flax fibers using electron microscopy are presented. The complex of studies on the selection of the composition of thermal insulation slabs from flax fibers and flax noils has been conducted to determine the process of absorption of humidity from the air. The humidity absorption of insulants based on flax fibers and flax noils has been determined at a relative humidity of 40–97% using sodium liquid glass and modified liquid glass, as well as «Akotherm flaks» slabs. The thermal insulation slabs water vapor absorption kinetics has also been investigated, taking into account the time parameter. The effect of absorption humidity on the thermal conductivity of the studied materials has been examined; for this purpose, the coefficients of thermal conductivity of materials with the maximum humidity content of insulators were determined. The results of the tests indicate the highest efficiency of thermal insulation slabs made of flax fiber tow compared with insulation materials based on flax fibers and «Akotherm flaks» slabs.
Green Integrated Structural Elements for Retrofitting and New Construction of Buildings
Authors: Kastiukas G , Zhou X 
Published: December 2019

Abstract
Governments across Europe have ambitious visions for the construction sector sector. For example, in the UK, as part of the Clean Growth Grand Challenge within the Governments Industrial Strategy, we are aiming to halve the energy use of new buildings by 2030; delivering new construction assets at a third of the cost and significantly quicker; provide assets that are cheaper to run, smarter, safer with lower emissions; and ultimately create cleaner air. As part of this deal and the wider The ‘Construction Sector Deal’ sets out an ambitious partnership between the industry and Government that aims to transform the sector’s productivity through innovative technologies and a more highly skilled workforce aims to transform the efficiency of construction techniques through digital technologies like Business Information Modelling; reduce running costs through energy generation and storage technologies; and conduct research and development and demonstration programmes supporting innovations. The core aim of the project is to seamlessly combine four integrated layers with high structural performance, which would provide high levels of insulation, a healthy indoor environment, high aesthetic value, along with CO2 capture, and greywater management. The competitive advantage of the Green INSTRUCT panel is (1) sustainable and cost effective - using more than 70% wt. C&DW including concrete, bricks, plastic, metals; (2) safety and energy efficiency - meeting Eurocode standards for fire safety, thermal insulation with U-value of 0.14 W/m2.K and acoustic insulation coefficient under 60dB and (3) Customisation potential -multi-layered, modular & prefabricated building block for new and old building. This paper will discuss key project achievements in terms of material development and innovation and challenges faced so far during the project.
Design and application of sensitive thermal energy storage from concrete.
Authors: Rusovs D , Jaundālders S , Stanka P 
Published: December 2019

Abstract
The main objectives of the authors’ current paper include thermal sizing of a regenerative concrete heat exchanger for coupling of the biomass plants and the heat engine like ORC (Organic Rankine Cycles). The main challenge for regenerators is the temperature difference between charging and discharging process. Heat energy charging can be done by hot flue gas or high temperature fluid circulation through solid modules of storage. Optionally heat supply can be obtained by using of electrical energy. The concrete modules contain embedded piping for charging and discharging and definition of the geometric parameters like piping size and distance represented in current work. The application of unsteady heat transfer equations for heat storage description was checked by comparison with experimental and theoretical results. The paper offers equations for evaluation of storage efficiency for different heat transfer coefficient, dimensions of storage and time duration of warming and cooling process.
Computer Simulation of Kinetics of Parallel Mechanisms
Authors: Mkrtychev O V , Kartygin A V 
Published: December 2019

Abstract
The paper considers the issues of kinematics and dynamics of a parallel mechanism and computer simulation of its movement. To solve the problems of dynamics of parallel mechanisms, the method of Lagrange equations of the second kind was used. In computer modeling, the Matlab and Simulink application were used.
Experimental studies of rotatory rolling of long thin-wall pipes
Authors: Lavrentiev A M 
Published: December 2019

Abstract
The article considers the application of rotatory rolling of the external surface of a long thin-wall pipe. The author studied the possibility of correcting the form of a thin-wall pipe outer diameter by means of rotatory rolling with cylindrical rollers having a rectilinear generator and set for a self-tightening angle with a simultaneous decrease of the processed surface roughness. Further, the author provide a photo of the measuring device used to define the circular deviation of a thin-wall pipe surface. A polar diagram of the pipe surface as-delivered and its profile record were made. The article provides a photo showing the adjustment process of a rotatory reeling machine with three deformation rollers for treating long thin-wall pipes in the system of a general purpose lathe. The experiment results are presented in the form of a polar diagram and the treated surface profile record. It is shown that after rotatory rolling the circular deviation decrease to 0,1 mm while the surface roughness decreased from Ra 1,83 um to Ra 0,23 um.
Experimental research of features of surface treatment using plastic deformation
Authors: Oteny Ya N , Lavrentiev A M 
Published: December 2019

Abstract
This study is devoted to the processing of external cylindrical surfaces by surface plastic deformation. The slip-page of tapered rollers during rolling of cylindrical samples made of steel 35 and 45 has been studied. A diagram is presented for determining the slippage during treatment by surface plastic deformation, as well as a section of a diagram chart with signal recording. It is according to this section that the pulses from current collectors in contact with roller surfaces and workpieces assigned to a specific recording length have been counted. The depth of penetration of the deforming roller into the workpiece and its effect on the roughness of the treated surface have been determined. The results of experimental studies are presented as graphs of dependence of slippage change on self-feed and penetration angles, of roughness on deformation rate as well on penetration and self-feed angle. It has been shown that the deformation force remains practically unchanged at self-feed angles ranging from 0 to 3 degrees. Therefore, a decrease in surface roughness of the treated samples can be explained by the presence of slippage of the contacting surfaces of the rolled workpiece and the deforming roller. It has also been found that if one installs a tapered roller with a smaller base in the feed direction, the roughness is slightly reduced, compared to installing the same deforming element with the same base in the direction opposite to the feed.
Bearing defects diagnostics using the principal components analysis
Authors: Abidova E A , Lapkis A A , Chernov A V 
Published: December 2019

Abstract
In this paper a new method of bearing defects detecting and defect severity assessment based on the results of singular spectrum decomposition (SSD) of the vibration signal is proposed. The presented results of equipment diagnostics in the laboratory conditions have demonstrated the applicability of signal representation in the principal component basis to improve diagnostic sensitivity.
Study of adaptive hydraulic drive of rotary drilling machine
Authors: Lemeshko M A , Stradanchenko S G , Iliev A G , Zanina I A 
Published: December 2019

Abstract
The article deals with drilling machines in which the ratio of the load between the power to rotate and the power to feed is carried out automatically due to the structure of the adaptive machine, with the provision of self-regulation for drilling modes close to optimal. Changing drilling conditions automatically results in a change in the ratio of speed to feed force, providing maximum performance while protecting against sudden overloads, for example, when encountering solid inclusions in the drill rock, or when shading a well. The ratio of frequency of rotation and feed rate determines the specific depth of cut (specific feed) and determines the performance of the working process of the drilling machine. A typical example of such a machine is a drilling machine rotary type with hydraulic rotation and feed. The cutting theory determines the rational drilling conditions, known rational specific feed, rational speed, minimum and maximum feed force, depending on the strength of the material being drilled and the degree of blunting of the cutting tool.
The block diagram of such a drilling machine is considered and the analysis of the influence of parameters and characteristics of individual hydraulic elements on the drive setting on the rational mode of operation is given. The research stand and its structure are given, some results of experimental researches are given. It is established that the chokes of the drive settings can adjust the degree of adaptation, change its sensitivity to external influences and change the range of operating conditions for the rational functioning of adaptive drilling.
Study of the influence of the basic spectra of discrete light sources on the seeds of greenhouse cultures
Authors: Donskoy D Yu , Vernezi M A , Katin O I , Goryanina K I , Studennikova S G , Petkovic M 
Published: December 2019

Abstract
This article refers to studies conducted on the seeds of vegetable and green crops with low useful mass, which require light stimulation at all periods of development. Research was conducted using RGBW LEDs. There is a large number of scientific studies proving the effectiveness of the technology of photostimulation of seeds and seedlings of various crops. However, there is no consensus on what the positive effect of the variable light field on a biological object is based. This is due to the complexity of the process of photosynthesis, where the productivity of photosynthesis is considered as an integral response to the influence of external conditions. The study of the influence of various light modes on plants is necessary to search for performance criteria. The found efficiency criteria will provide an opportunity to systematize the many well-known results of the impact of variable light conditions on plants in order to identify plants as a biological object by optical properties, as well as to use to standardize technological lighting in greenhouse production.
The use of statistical analysis methods in assessing long-term prognoses in patients with acute coronary syndrome and contrast-induced nephropathy
Authors: Kobzeva N , Terentev V , Zolotuhina I 
Published: December 2019

Abstract
Thus, using a rank correlation analysis, a preliminary analysis of the relationship between the increase / decrease in blood creatinine, blood urea, GFR (Cockcroft-Gault) and GFR (CKD-EPI) after coronary angiography with vascular events was performed. A KaplanMeier survival analysis demonstrated the statistically significant effect of contrast-induced nephropathy on the risk of death from myocardial infarction in patients with long-term acute coronary syndrome.
Determination of the practical accuracy of the operation of the safety friction clutch with a variable gain installed in the forging equipment ensuring the absence of breakdowns
Authors: Kobzev K O , Bozhko E S , Mozgovoi A V , Iliev A G , Kovaleva A A 
Published: December 2019

Abstract
The created version of SFC with a variable value of the feedback gain theoretically has the accuracy of operation of the “ideal” SFC when it is installed in forging and stamping equipment. A variable value of the gain is obtained by changing the pressure angle of the rolling element control device depending on the transmitted load.
To obtain a variable value, the gain in the SFC was changed in the design of the control device.
The experimental studies of the full-scale SFC sample with a variable gain, however, showed that the coupling does not have the accuracy of operation inherent in the “ideal” SFC. Since the gain was experimentally studied in the static loading mode on the installation with a shortened kinematic chain, i.e., with a smooth increase in the load (the time of the full overload, which leads to the operation of the SFC, is longer than the period of natural vibrations of the system), the effect of unaccounted dynamic loads is practically excluded.
Theoretical foundations of the use of single-circuit negative feedback in safety friction clutches with differentiated friction pairs installed in forging equipment
Authors: Kobzev K O , Bozhko E S , Mozgovoi A V , Molev M D , Stuzhenko N I 
Published: December 2019

Abstract
From studies aimed at summarizing the results of private surveys, conditions of high accuracy SFC with single-loop negative feedback are obtained. These conditions reflect the dependences of the magnitude of the coefficient of force and the spacer force generated by the feedback control device on the current coefficient of the gain value of the coefficient of friction, which theoretically ensure the limiting value of the torque transmitted by the clutch, which leads to failure-free operation of the crank presses.
Aspects of using single-circuit negative feedback in a safety friction clutch with all leading friction pairs, taking into account installation in crank presses
Authors: Kobzev K O , Bozhko E S , Mozgovoi A V , Chertov Y E , Zanina I A 
Published: December 2019

Abstract
A feature of the considered option is that, as an analog, a safety friction clutch (SFC) of the usual accuracy of operation in crank presses, in which there is no feedback control device, is adopted. Moreover, this case is applied only with a minimum value of the coefficient of friction, i.e., a constructive version of such a SFC should provide for the feedback control device to be turned off from operation under the indicated condition. Taking into account the structure of the ratio for calculating the magnitude of the gain, as well as the fact that for the “ideal” SFC, this value should be variable, it should be noted, taking into account the previous experience in calculating and constructing SFC of this type, that it is most convenient to vary the magnitude of the gain by changes in the angle (pressure angle of the rolling element control device).
The heating rate influence on the elastic modulus temperature dependence of a corrosion-resistant nickel alloy
Authors: Zhilyakov A Yu , Belikov S V , Polovov I B , Gibadullina A F , Elkina E V 
Published: December 2019

Abstract
The temperature dependence of the elastic modulus of nickel-chromium-molybdenum alloy C4 was investigated by the method of dynamic mechanical analysis. At all heating rates, an abnormal increase in the elastic modulus is observed upon heating in the temperature range of 200-300 °C. It is shown that an increase in the heating rate shifts the beginning of the observed effect to the region of higher temperatures. The temperature anomaly in the elastic modulus of the C4 alloy is explained from the standpoint of the formation of a short-range order in a solid solution. The thermodynamically equilibrium temperature of the “disorder – short-range order” transition in C4 alloy is determined to be 205 °C.
Investigation of optical properties of QD-InAs/GaAs heterostructures obtained by ion-beam deposition
Authors: Blokhin E E , Irkha V A 
Published: December 2019

Abstract
In this paper, we investigate heterostructures with an array of InAs quantum dots encapsulated by GaAs barrier layers obtained by ion-beam epitaxy. The thickness of the layers was less than 30 nm. It is shown that this technique allows to obtain quantum dots with lateral dimensions up to 50 nm with a height of 10 nm. The density of the obtained array of quantum dots was 109 cm−2. The studies performed using photoluminescence methods revealed the peaks of the main transitions for quantum dots at 1.1 eV (1150 nm) for samples with GaAs barrier, which corresponds to the near-infrared. The width of the main peak of the samples was about 0.2-0.25 eV, which is associated with the dispersion of quantum dots sizes. Dark current-voltage characteristics of the structures proved that the value of dark current density at 90 K is about 10−6 A/cm2. The asymmetry of the dark current curves at positive and negative shifts is determined. The samples also showed that an increase of temperature leads to degradation of characteristics. When the operating temperature rises to 300 K, the density of the dark current changes in the range from 0.1 to 0.01 A/cm2.
Development of a mathematical model for determining the EMF of the secondary winding of a measuring current transformer based on the Rogowski coil
Authors: Oganyan R , Gorbatenko N , Lankin M 
Published: December 2019

Abstract
This article is devoted to the development of a mathematical model for determining the electromotive force (EMF) of the secondary winding of a measuring current transformer based on a Rogowski coil. The study focuses on determining the EMF in the secondary winding of the current transformer at different positions of the primary bus, its forms, as well as the overall dimensions of the whole measuring equipment. The study was conducted on the basis of finite element modeling and elements of the experimental design techniques. Finite-element models have been developed for various primary bus shapes in the Femm program. Regression models were obtained for determining the magnetic flux passing through the Rogowski coil in order to determine the EMF in the secondary winding using the Statistica program. The research results showed the importance of taking into account the position of the primary bus relative to the center of the Rogowski coil, as well as the influence of the shape of the primary bus on the measurement result of EMF in the secondary winding of the current transformer.
Model of deformation of a feather quill when rolling with a ribbed roller on the flat surface
Authors: Chertov Y E , Fisunova E Y 
Published: December 2019

Abstract
Mathematical modeling is an effective and cost-effective alternative to a trial physical experiment in solving problems associated with the development of new technologies and equipment. The paper is devoted to modeling the deformation process of a feather quill when rolling by a ribbed roller on a flat surface to form thorough kneading on its concave side, providing additional bending. The technology is used to enhance the Executive ability (“Fill Power” measure) of feather stock of land birds, which are used for manufacturing down-feather products, as an alternative to increasingly scarce and expensive feahers of waterfowl. This is especially true for products with a short service life, intended for use in the rectifying natural disasters and the consequences of accidents.
The developed mathematical model allows us to investigate the dependence of the resistance force of the roller on the design parameters of the working body: the knurling pitch; the angular size of the flute; the diameter of the riffle vertices.
Stresses arising in the structure of the quill under the action of compressive load, when loading and removing the load in an arbitrary cross-section of a feather quill have different values and are described by the corresponding regression models. The solution of the system of regression equations together with the kinematic equations of motion of the working body allows to determine the strength of resistance and power requirement of the deformation of feather quill of land birds to improve the “Fill Power” of feather stock.
The dependence of the total rolling resistance force for the working body and the chicken feather quill of the given parameters obtained on the model is given.
Medical Image Inpainting Using Multi-Scale Patches and Neural Networks Concepts
Authors: Gapon N V , Voronin V V , Sizyakin R A , Bakaev D , Skorikova A 
Published: December 2019

Abstract
In this paper, we consider the problem of medical images inpainting, where the goal is to reconstruct missing or damaged parts of the image. This is a good tool for medical applications such as vascular restoration, removal of specular reflections for endoscopic images, removal of MRI artifacts, etc. The new method combines the search for patches of various sizes and the operation of a pre-trained neural network. The large patches are used to reconstruct homogeneous areas, and then small patches are used to reconstruct structure image details. As a result, the proposed method provides a plausible of medical images inpainting. Experimental results demonstrate the effectiveness of the proposed method in the tasks of medical images inpainting.
Image defect detection algorithm based on deep learning
Authors: Sizyakin R A , Voronin V V , Gapon N V , Zelensky A A , Pižurica A 
Published: December 2019

Abstract
In this paper proposed a system for automatic defects detection in images. The solution to this problem is widely used in practice. Automatic detection is found in the challenge of detecting defects on the road surface, in the textile industry, as well as virtual restoration of archival photo images. The solution to this range of problems allows speeding up work in these areas, and in some cases, completely solving. To solve the first two problems (search for defects on the pavement and textiles), it is enough to create a mask that localizes defects in the image with maximum reliability, while photo restoration requires additional algorithms to restore the detected damaged areas. The proposed method is based on the latest achievements in the field of machine learning and allows solve the main disadvantages of traditional methods. Automatic defect detection is performed using a neural network with compound descriptor. A series of experiments confirmed the high efficiency of the proposed method in comparison with traditional methods for detecting defects.