bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study of the seismic isolation sliding belt: the case of a monolithic reinforced concrete building
Authors: Mkrtychev O V , Mingazova S M 
Published: January 2020

Abstract
This work highlights the application of an active seismic protection system using a sliding belt in the foundation to protect buildings and facilities located in earthquake-prone areas. The widespread type of seismic protection using rubber-metal supports (RMS) is complex and sometimes not cost-effective. The considered method of seismic protection using seismic isolation sliding belts has a number of advantages over the other types of seismic protection. However, the considered seismic isolation system still does not have an adequate mathematical model describing its action in the building-seismic isolation-foundation-base system. The study covered the efficiency of applying the seismic insulation sliding belt through the example of a 16-story monolithic reinforced concrete building. As a result of the calculations, the absolute accelerations, velocities, relative displacements, and intensity of stresses in the considered structure were obtained. An analysis of the calculations indicates the efficiency of seismic isolation using a sliding belt in the foundation for buildings constructed in earthquake-prone areas.
BIM as a tool for Green Building Certifications: an evaluation of the energy category of LEED, BREEAM and DGNB
Authors: Romano S , Riediger N 
Published: January 2020

Abstract
The Architecture, Engineering, and Construction (AEC) industry faces essential challenges related to the three sustainable pillars (social, economic and environmental). For instance, to decrease the carbon emissions, the consumption of energy and raw materials, to design sustainable cities and to improve the methodologies and technologies used to minimize cost and environmental problems. One alternative to overcome these challenges is the Green Building Certifications (GBCs), as for example Leadership in Energy and Environmental Design (LEED), Building Research Establishment Environmental Assessment Methodology (BREEAM), and German Sustainable Building Council (DGNB), and the new tools to support their process of implementation, for instance Building Information Modelling (BIM). The main objective of this paper is to study the viability of using BIM in the process of certification of energy category of LEED, BREEAM and DGNB for new projects using as a case study the building EUREF HAUS 12 – 13 located in Berlin - Germany. The methodology established is descriptive-exploratory and considers four research techniques, bibliography review, semi-structured interviews, BIM case study analysis, and work meetings with a BIM expert. The results illustrate that BIM can support all the energy requirements of LEED, BREEAM and DGNB and that despite the challenges that represent the implementation of BIM in GBCs, the advantages of it increases the efficiency of this process significantly.
Fatigue cracks in castellated I-beams under cyclic loads
Authors: Saiyan Sergey , Paushkin Alexander 
Published: January 2020

Abstract
The numerical calculation is carried out to predict the places of fatigue cracks, determine the fatigue life and the path of crack propagation of castellated beams, specifying the possibility of their use under multi-cycle loads. The method was implemented by using of the developed subroutine in the Ansys Mechanical software package in the parametric programming language APDL (ANSYS Parametric Design Language). The calculation is carried out in the form of successive quasi-static iterations.
Using counterfactuals from macroeconomic models to assess risks to accomplishment of structural innovations
Authors: Passmore D , Borkovskaya V 
Published: January 2020

Abstract
A macroeconomic model often described as an input-output model, is specified mathematically to characterize production and consumption in an economy. Perturbations of attributes this macroeconomic model allow the examination of counterfactuals - hypothetical scenarios that run “counter to the facts” of an existing reality – to assess risks to accomplishments of structural innovations in light of plausible endogenous or exogenous shocks to the economy.
Modeling and analysis of three-layer floor slabs made of composite materials
Authors: Khayrnasov K Z 
Published: January 2020

Abstract
A three-layer composite floor slab is considered, consisting of two external bearing layers made of a multilayer composite material, and a filler layer between the bearing layers made of polystyrene. Relations are given to determine the characteristics of multilayer composite materials with different locations of the base layers of the material. The technique of the optimal arrangement of the basis of the composite material in layers is given. Methodology for calculating three-layer structures consisting of external bearing layers and a filler layer between them. The analysis of the results and prospects of using three-layer composite floor slabs in construction.
Mathematical model and calculation of the working part of the power plant
Authors: Kornilov A , Vasileva E 
Published: January 2020

Abstract
This article deals with the problem of the flow around a thin profile with perforations on the contours. The perforations are simulated using a “sink-and source” hydrodynamic model. The formulas for calculating the main vector of the flow pressure forces on the profile as well as that of the moment of the profile regarding the front edge have been obtained.
Modeling of deformation processes of structural steels along circular paths
Authors: Zubchaninov V G , Alekseev A A , Gultiaev V I 
Published: January 2020

Abstract
To verify the mathematical model of the theory of processes, numerical calculations of the complex elastoplastic deformation of steel along a flat curvilinear trajectory with simultaneous tension-compression with torsion were carried out. Comparison results are compared with the data of the physical experiment. It has been shown that the mathematical model used qualitatively and quantitatively satisfactorily describes the basic effects of complex plastic deformation for a given class of paths.
Fatigue strength assessment of track rollers
Authors: Götz Sebastian , Schröder Stefan 
Published: January 2020

Abstract
The paper presents a general concept for fatigue strength assessment in rolling contact between track roller and rail. The multi-axial stress state is analysed using the critical plane method. Depending on the orientation of the section plane, different load cycle combinations result with different stress-amplitude and mean-stress combinations. The Haigh diagram outlines the fatigue strength of the material. The load cycles in all section planes are plotted there and the safety factor can be determined directly. In comparison to other empirical concepts, similar values are obtained for the allowable maximum contact pressure. The advantage of this method is its general applicability, without any restrictions regarding the geometry or material.
SOLUTION OF THE PROBLEM OF STABILITY OF 40X STEEL SHELL
Authors: Cheremnykh S , Kuzhin M 
Published: January 2020

Abstract
Discusses the solution of the problem of a circular elastic-plastic bifurcation of thin-walled cylindrical shell under the proportional subcritical processes loading shell axial compressive force and torque in deviatoric space of deformations of A. A. Ilyushin. The solution is based on the theory of stability of inelastic systems under complex loading V. G. Zubchaninov. The incompressibility condition of the material and the homogeneity condition of the stress state in the shell up to the moment of loss of stability are used. The problem is solved in a geometrically linear formulation [1-7].
Formation of the spatial structure of a condensed system of calcium sulphate dihydrate
Authors: Buryanov A F , Petropavlovskaya V B , Novichenkova T B , Petropavlovskii K S 
Published: January 2020

Abstract
At present, universal models of the structure of crystalline bodies are well known. Such models should describe the structure of solids at the micro level. They are presented in the form of geometric topological models. Spatial models are also used to describe the structures of mineral disperse systems that arise during their crystallization. The arrangement of system elements represented as non-deformable rigid spheres can be interpreted based on topology. Simulation in the study of condensed systems makes it possible to quickly process and analyze significant data arrays in the directional synthesis of complex dispersed systems.
Saint-Venant principle for kinematic boundary conditions
Authors: Saiyan Sergey , Paushkin Alexander 
Published: January 2020

Abstract
A variant of the extended formulation of the Saint-Venant principle is formulated, including its generalization to kinematic parameters. Using the LIRA CAD software package, a numerical experiment is carried out, during which the zones of tangential stress disturbances in the support zone of a rigidly clamped I-beam under various kinematic boundary conditions are determined.
Impact of loading rate increase on stress-related properties of concrete
Authors: Tsvetkov K 
Published: January 2020

Abstract
Concrete and reinforced concrete structures of buildings and facilities can be exposed to dynamic loading in which case various kinds of stressed states may occur. To make up the design models of these structures, it is necessary to know the characteristic features of changes in the stress-related properties of concrete, taking account of the joint impact of stressed states and increased loading rates. Several researchers have obtained the data about the impact of the loading rate on the stress-related properties of concrete, mainly for uniaxial compression and under bending [1]-[10], whereas the goal set in this paper is to analyze the loading rate under biaxial compression in which one of the main stresses is generated by static loading and the other by dynamic loading. The study was carried out by experimental research methods. The test results are presented as load-strain charts, plots of changes in strain modules and transverse and dilatational strains. According to the investigation results, the kind of charts is heavily influenced by the kind of stressed state and the loading rate. The analysis of the test data allows making suppositions about the physics of the impact of the loading rate on the peculiar features of concrete strain.
The loss of durability in reinforced concrete structures
Authors: Maj Marek , Grzymski Filip , Ubysz Andrzej 
Published: January 2020

Abstract
Durability becomes a very important factor in design. Concrete, and in particular reinforced concrete constructions, are sensitive to environmental impacts (actions on construction) and also have a strong environmental impact (e.g. pollution, noise, dynamic interactions etc.). The feature of concrete, which is durability, has an impact on the reliability of the structure. The time during which the structure has a fixed durability should be one of the parameters in the design of the structure. Durability despite the passage of time of use can be restored.
Urinary Stones Clustering on each layer based on Hounsfield Units Values from Micro CT-SkyScan Images
Authors: Warty Y , Haryanto F , Fitri L A , Maulana R , Herman  
Published: January 2020

Abstract
The appropriate treatment method for the patient with urinary stones can be determined from the information of the mineral composition of urinary stones. The prediction of the stone type could improve the selection of the interventional modalities. The study aimed to determine the type of the urinary stone for each layer based on the value of Housefield Units (HU) from micro CT-SkyScan images. Five samples were cleaned with 75% alcohol and distilled water. Micro skyScan 1173 was used to scan urinary stones with applied current and voltage of 66 mA and 120 kV respectively. NRecon software was used to reconstruct the projected image. Region of Interest (ROI) was set at each layer and analyzed both qualitatively and quantitatively. The determination of chemical constituents of stones/fragments was performed using Energy Dispersive X-Ray Spectroscopy. The chemical compositions of calcium oxalate monohydrate, struvite, a mix of calcium oxalate and calcium phosphate, a mix of calcium oxalate and struvite and calcium phosphate, uric acid were accurately identified based on the micro SkyScan images with the mean HU. Micro SkyScan images could predict the chemical composition for each layer of urinary stones. However, more samples are needed for clustering various types of urinary stones based on HU value.
Influence of Impulse-Electric Field on Dielectric Properties of Nerve Membranes
Authors: Tarigan Kerista , Sembiring Timbangen , Wirjosento Basuki , Sinambela Marzuki 
Published: January 2020

Abstract
An investigational study of the impulse-electric field on an increase in the potential of nerve membranes, increased ion absorption of Na, K, Cl, has been conducted. The aim of this study is not only to observe the performance of the electric field as a source of energy but also to look the effective, efficient and non-thermally disabling, disinfecting the microorganisms. Based on the result of research, qualitatively with object of parasitic nematode, there is tenfold increase possibly in critical nervous membrane from normal potential, in intensity of electrical field of 13.33 – 18.66 kV/cm in angle, θ is 44.41˚, and comparative membrane dielectric decreased to 0.2, it led to dielectric rupture, non-active effects, and needs an energy only 0.64 mJ for twenty triggers, with condition of electrode potential of 6.3 kV.
A proton-neutron QRPA Calculation of the β- Decay of Nd152 using the Fayans Energy Density Functional
Authors: Oktova Raden 
Published: January 2020

Abstract
This paper presents a calculation of the β– decay of the neutron-rich nucleus Nd152 using the proton-neutron Quasi-particle Random Phase Approximation (pnQRPA) model. The single-particle ground states are calculated self-consistently using the Fayans energy density functional in a Hartree-Fock-Bogoliubov (HFB) scheme for deformed nuclei. The quasi-particle states which are needed for the pnQRPA calculation are calculated from the HFB single-particle ground states using the Bardeen-Cooper-Schriefer (BCS) approximation. Only Gamow-Teller β– excitations are considered, and two kinds of excitation force are used to excite the daughter nucleus to produce the β– decay: (a) a pure Migdal force, and (b) a Migdal force plus a correction term obtained self-consistently from the BCS quasi-particle basis. The calculations with the pure Migdal force and the corrected Migdal force give half-lives of 5.92 min and 6.91 min, respectively, which are about one half of the experimental value of 11.6(7) min, and decay energies of 1.38 MeV and 1.33 MeV, respectively, both close to the experimental decay energy of 1.12 MeV. The correction to the Migdal excitation force turns out to improve the accuracy of the calculations.
Structural and Radiation Shielding Properties of Dy3+ doped Phosphate Glasses
Authors: Kothan S. , Kaewkhao J. , Kim H.J. , Muangmala W. , Kiatwattanacharoen S. , Jumpee C. , Kaewjaeng S. 
Published: January 2020

Abstract
X - Rays has become integral and indispensable part of health care diagnosis and intervention. Which involve the risks of occupational overexposure of radiation to the patients and health care personnel. The Radiation exposure depends on “Time-Distance-Shielding”. Reduction of the exposure time, increasing the distance from source proper shielding are important for protection. We need a high quality or suitable shielding material for reduction of unnecessary radiation. Although the material commonly used for radiation shielding is lead, but the environmental toxicity of lead (Pb) is a global threat that has led to the need to develop lead-free (Pb-free) and non-toxic radiation shielding glasses. In this study, the effect of Dy2O3 on physical and radiation shielding properties of 59P2O5: 10Al2O3: 20 Na2O: 10 Gd2O3: 1Dy2O3 glasses have been investigated were fabricated by melt-quenching technique. The X-rays shielding properties such as the mass attenuation coefficients (μ
m
) and half value laver (HVL) of glass sample. It may also be mentioned that glass has the double function of being a radiation shielding material because of the properties of glass being transparent to visible light, absorption X-rays. Thus, the developed glasses shielding had good shielding properties, and highly practical potentials in the environmental friendly radiation shielding materials without an additional of lead.
Mechanical properties of brake pad composite made from candlenut shell and coconut shell
Authors: Juan Randy Simamora , Kurniawan C. , Marbun J. , Simamora P. 
Published: January 2020

Abstract
Development of technology, driving a lot of demand for materials that are cheaper, durable, and environmentally friendly for various purposes, especially in the automotive field. The most important safety feature of any vehicle is its braking system. The ability of brakes is to provide safe and repeatable stopping, which is related to safety of automobiles and human. In this study, candlenut shells (CdNS) and coconut shells (CNS) are used as composite materials in the manufacture of brake linings. The presented research work investigates / explore the mechanical properties and physical of brake pad composites formed candlenuts shell (CdNS) and coconut shell (CNS) composite and wear performance of friction materials. The specific wear rate generally increases with the increase in applied load and sliding speed for all compositions.
Hydrothermally Synthesis of Al2O3 Nanoparticles for Nanofluids with Enhanced Critical Heat Flux
Authors: Dani Gustaman Syarif , Djoko Hadi Prajitno , Jupiter Sitorus Pane 
Published: January 2020

Abstract
Water is widely used as a heat carrier in various devices such as automotive and nuclear reactors. Because of its better thermal characteristics, currently nanofluid is a candidate for replacing water and other conventional cooling fluids such as ethylene glycol and oil as a heat carrier. In this study, Al2O3 nanoparticles have been synthesized by the hydrothermal method for heat transfer nanofluid as an alternative to the new cooling fluid. Nanoparticles were synthesized using AlCl3 as a precursor, and urea was used as a capping agent. The hydrothermal process was carried out at 175°C for 17 hours. The hydrothermal product was dried and then calcined at 500°C for 1 hour. The resulting Al2O3 nanoparticles were analyzed using XRD, FTIR, and TEM. Nanofluids were prepared from these nanoparticles by dispersing them into the water as a base fluid. Nanofluid characterization was carried out through Critical Heat Flux (CHF) measurements. According to the XRD data, the Al2O3 nanoparticles produced were gamma-alumina with a crystallite size of 4 nm. The BET specific surface area was 302 m2/g. From the TEM image, it was known that the nanoparticles formed a cluster of rod-shaped particles. FTIR data shows the presence of OH groups on the surface of the nanoparticles. The Al2O3 nanofluids made were known to be stable with an average zeta potential of 54 mV. Compared to water, the CHF enhancement of this nanofluid increased by 111%. The nanofluid has the potential to be used as a cooling fluid for ECCS, RVCS, refrigeration, and metal machining process.
The effect magnesium (Mg) on structural and optical properties of ZnO:Mg thin film by sol-gel spin coating method
Authors: Siregar Nurdin , Motlan  , Panggabean Johnny 
Published: January 2020

Abstract
ZnO:Mg thin film had been synthesized by sol-gel spin coating method. The materials used were zinc acetate dehydrate, magnesium, isoprol as a solution and diethanolamine as stabilizer. Concentration variation between Mg doped ZnO were 0.5; 1.0; 1.5; 2.0 and 2.5%. The XRD results showed that all samples were wurtize hexagonal with the smallest size of 24 nm for Mg doped of 0.5% and the biggest size of 28 nm for Mg doped of 2.5%. The SEM results showed that the ZnO:Mg thin film morphology was uniform round granules. The UV-Vis results showed the biggest transmission and absorbance values were in the range of 310 - 420 nm, and band gap of 3.155 - 3.217 eV.
Nd3+ Doped In Zinc Barium Tellurite Oxyfluoride Glasses For Laser Application
Authors: Yamsuk Y. , Yasaka P. , Keawkhao J. , Sangwaranatee N. 
Published: January 2020

Abstract
The tellurite glasses doped with Nd3+ ion were prepared with the compositions (55-x)TeO2-10ZnF2-35BaO-xNd2O3 (where x = 0.00, 0.05, 0.10, 0.50 1.00 and 1.50 mol%) by the normal melt quenching technique and characterized the spectroscopic properties. The spectroscopic properties of tellurite glasses measured from the absorption and emission measurements with Judd-Ofelt analysis. The X-ray diffraction (XRD) pattern confirms the amorphous nature. UV-Vis-NIR absorption spectra of tellurite glasses divulged nine significant peaks. The absorption peaks slightly increase with increasing of Nd3+ concentration. The NIR emission spectra at 913, 1,069 and 1,341 nm have been registered for Nd3+ in tellurite glasses, which corresponds to the transitions originating from 4F3/2 level to the 4I9/2, 4I11/2 and 4I13/2 levels of Nd3+ ion, respectively, under the excitation of 523 nm. The results indicate that the prepared glass system could be a suitable candidate for using it as laser gain media around 1,069 nm.
Effect of Sodium Oxide and Sodium Fluoride in Gadolinium Phosphate Glasses Doped with Eu2O3 Content
Authors: Ravangvong S. , Rajaramakrishna R. , Chanthima N. , Sangwaranatee N. , Kaewkhao J. 
Published: January 2020

Abstract
Sodium gadolinium phosphate oxide and sodium gadolinium oxyfluoride glasses doped with europium oxide were prepared by melt-quenching technique. The physical, optical properties of the glass samples were studied. The density, molar volume and refractive index of the glass samples were carried out. Density and molar volume of oxide glass is more than oxyfluoride glass. The average phosphate to phosphate distance for oxide glass seems to be more than oxyfluoride glass. Polaron radius, inter-ionic radius shows 1.181 nm, 2.88 nm and 1.174 nm, 2.86 nm for oxide glass and oxyfluoride glasses respectively. Oxide electronic Polarizability and optical basicity of the oxide glass are lower than oxy-fluoride glass. Theoretical optical basicity shows higher for oxide glass than oxyfluoride suggesting increase in covalency of the cation to oxygen bonds in oxide glass. Optical band gap were estimated and found to be 3.061eV and 3.204 eV for oxide and oxyfluoride glass. Theoretical two photon absorption coefficient β were evaluated and found to be 11.96 and 10.80 for oxide and oxyfluoride glasses respectively. Furthermore, the glasses were subjected to study for their luminescence properties of the oxide and oxyfluoride glass samples.
The effect of Al Element on Electrochemical Impedance of ZnO Thin Films
Authors: Sugihartono Iwan , Budi Setia , Fahdiran Riser , Handoko Erfan 
Published: January 2020

Abstract
We have grown no-doped and Al-doped ZnO thin films with different Al element composition by ultrasonic spray pyrolysis (USP). The deposition by USP was performed with the temperature of 450 °C, ultrasonic frequency of 1.7 MHz, and under atmosphere ambient for 15 minutes on top of Si substrate. Structurally, X-ray diffraction (XRD) pattern of non-doping and Al-doped ZnO (AZO) thin film have polycrystalline hexagonal wurtzite and amorphous. Optical absorbance confirmed that AZO thin films with polycrystalline phase have higher absorbance than amorphous. According to the frequency-dependent Nyquist plot of non-doping and AZO thin films at room temperature, we believed the proper concentration of Al in ZnO thin films can be used to improve electron transfer ability.