bluuebunny/crossref_metadata_2025 huggingface dataset:
Measurements of elastic scattering cross sections for 25.2, 28.5, 37.4, 36.8, and 42.2 keV X‐ray photons in elements with 22 ≤ Z ≤ 83
Authors: Upmanyu Arun , Singh Gurjot , Kainth Harpreet Singh , Mehta Devinder , Shahi Jangvir Singh , Kumar Sanjeev
Published: September 2018

The differential elastic scattering cross sections were measured for 25.2 (Sn‐Kα), 28.5 (Sn‐Kβ1,3), 37.4 (Nd‐Kα1), 36.8 (Nd‐Kα2), and 42.2 (Nd‐Kα1,3) keV X‐ray photons at 139° scattering angle in elements with 22 ≤ Z ≤ 83. The measurement was done in reflection mode experimental setup involving 50Sn/60Nd secondary targets excited with 241Am radioisotope. The scattered X‐ray photons were detected using a high‐resolution low energy germanium detector (horizontal configuration, FWHM = 300 eV at 59.5 keV) coupled with computerized multichannel analyzer. The intensity of X‐ray photons along with geometrical factors were calculated from the theoretical knowledge of K X‐ray fluorescence cross sections and measured K X‐ray yields from excited targets. The measured values of differential cross sections were compared with the theoretical available values based on form factor and second‐order S‐matrix (SM) approaches. The experimental values of cross sections exhibit a large deviation from modified form (MF) values for the elements with BK/Ein ≈1, where BK is the K‐shell binding energy of electrons and Ein is the energy of incident photon. These deviations in experiment results were smooth out by the inclusion of anomalous scattering factors (ASFs) to the MF values. The measured elastic cross sections were found to be ~7% lower than MFASF values and agree with SM values for all elements under investigation.
Phosphatidate phosphatase activity is induced during lipogenesis in the oleaginous yeast Yarrowia lipolytica
Authors: Hardman Derell , Ukey Rahul , Fakas Stylianos
Published: September 2018

Phosphatidate (PA) phosphatase dephosphorylates the membrane phospholipid PA to diacylglycerol (DAG) that can be used for the synthesis of the storage lipid triacylglycerol (TAG). In Yarrowia lipolytica, TAG biosynthesis is induced during the lipogenic phase, which results in the accumulation of this lipid in cells. The accumulation of TAG during lipogenesis requires the supply of DAG, but the source of this DAG is not known in Y. lipolytica. In this study, the regulation of PA phosphatase during lipogenesis and its contribution to TAG biosynthesis was examined in Y. lipolytica. Lipogenesis was triggered by growing cells in high‐glucose media, whereas control cultures were grown in low‐glucose media. PA phosphatase activity increased in a time‐dependent manner as high‐glucose cells progressed in the lipogenic phase. In contrast, the activity decreased in low‐glucose cells that did not accumulate lipids. An analysis of the subcellular localization of the PA phosphatase activity showed that the membrane‐associated activity increased during lipogenesis. The significance of this increase can be explained by the fact that only the membrane‐associated PA phosphatase activity is responsible for the production of DAG. Taken together, these results indicate that PA phosphatase is involved in TAG biosynthesis during lipogenesis in Y. lipolytica.
Novel 3d bosonic dualities from bosonization and holography
Authors: Aitken Kyle , Baumgartner Andrew , Karch Andreas
Published: September 2018

Abstract

We use 3d bosonization dualities to derive new non-supersymmetric dualities between bosonic quiver theories in 2 + 1 dimensions. It is shown that such dualities are a natural non-Abelian generalization of the bosonic particle-vortex duality. A special case of such dualities is applicable to Chern-Simons theories living on interfaces in 3 + 1 dimensional SU(N) Yang-Mills theory across which the theta angle jumps. We also analyze such interfaces in a holographic construction which provides further evidence for novel dualities between quiver gauge theories and gauge theories with adjoint scalars. These conjectured dualities pass some stringent consistency tests.
RAPOPORT–ZINK UNIFORMIZATION OF HODGE-TYPE SHIMURA VARIETIES
Authors: KIM WANSU
Published: September 2018

We show that the integral canonical models of Hodge-type Shimura varieties at odd good reduction primes admits ‘$p$-adic uniformization’ by Rapoport–Zink spaces of Hodge type constructed in Kim [Forum Math. Sigma6(2018) e8, 110 MR 3812116].
Théologie de la rédemption et éthique sexuelle: unité et cohérence du ‘développement’ 1 Co 5–7
Authors: Berge Loïc P. M.
Published: September 2018

The literary status of 1 Cor 5–7 is diversely considered in scholarly literature. Sometimes these chapters are seen as a stand-alone part of the letter, sometimes they are divided in separate blocks, chapters 5–6 on the one hand and chapter 7 on the other. However, an original approach that pays close attention to the structure of the text makes it possible to show the neat architecture of this larger textual unit. The concentric structure of the three chapters (A–B–A’) highlights their literary unity and stresses the significance of the central chapter, which correspondingly possesses the greatest theological density of the whole section.
Jesus der Täufer und die Reinwaschung der Jünger
Authors: Förster Niclas
Published: September 2018

The dispute ‘about purification’ between the disciples of John the Baptist and a Jew (John 3.25) has to do with the priority of ethical purity as effected through baptism over the ritual washing prescribed by the Torah, e.g. before entering the Jerusalem temple. This issue is referred to in John 13.10 and 15.3, and also in P.Oxy. 840. It is presupposed here that the circle of Jesus’ disciples received John's baptism of repentance either from John the Baptist or from Jesus (John 3.22, 26; 4.1). The Gospel of John thus engages with an ongoing debate within Jewish Christianity about the obligatory nature of ritual washing.
COMMENTS ON THE REPORT OF THE INTERNATIONAL PANEL ON SOCIAL PROGRESS, CHAPTER 7: THE FUTURE OF WORK, GOOD JOBS FOR ALL
Authors: Alarcón Diana
Published: September 2018

The authors of Chapter 7, The Future of Work, have made a thorough review of recent labour market trends. In telling a global story, the authors provide a vision of the future of work that should guide policy initiatives for the creation of desirable jobs for all. This vision is one where economic growth is consistent with ecological sustainability; with full and fair employment and no discrimination; where workers control their time and tasks; and where there are inclusive labour market institutions. The policies that the authors put forward to advance this vision include flexibility in the rules related to employment protection to avoid deeper segmentation of the labour market; the creation of social protection systems to cover all workers; the provision of broad access to education and skill formation at different stages of life; the guarantee of equal opportunities and non-discrimination; and respect for collective bargaining.
Implementation of a multicomponent telemonitoring intervention to improve nutritional status of community-dwelling older adults: a process evaluation
Authors: van Doorn-van Atten Marije N , de Groot Lisette CPGM , Romea Albert Collet , Schwartz Simon , de Vries Jeanne HM , Haveman-Nies Annemien
Published: September 2018

Objective

The present study aimed to conduct a process evaluation of a multicomponent nutritional telemonitoring intervention implemented among Dutch community-dwelling older adults.

Design

A mixed-methods approach was employed, guided by the process evaluation framework of the Medical Research Council and the Unified Theory of Acceptance and Use of Technology. The process indicators reach, dose, fidelity and acceptability were measured at several time points within the 6-month intervention among participants and/or nurses.

Setting

The intervention was implemented in the context of two care organisations in the Netherlands.

Subjects

In total, ninety-seven participants (average age 78 years) participated in the intervention and eight nurses were involved in implementation.

Results

About 80 % of participants completed the intervention. Dropouts were significantly older, had worse cognitive and physical functioning, and were more care-dependent. The intervention was largely implemented as intended and received well by participants (satisfaction score 4·1, scale 1–5), but less well by nurses (satisfaction score 3·5, scale 1–5). Participants adhered better to weight telemonitoring than to telemonitoring by means of questionnaires, for which half the participants needed help. Intention to use the intervention was predicted by performance expectancy (β=0·40; 95 % CI 0·13, 0·67) and social influence (β=0·17; 95 % CI 0·00, 0·34). No association between process indicators and intervention outcomes was found.

Conclusions

This process evaluation showed that nutritional telemonitoring among older adults is feasible and accepted by older adults, but nurses’ satisfaction should be improved. The study provided relevant insights for future development and implementation of eHealth interventions among older adults.
Imaging Lithospheric Discontinuities Beneath the Northern East African Rift Using S‐to‐P Receiver Functions
Authors: Lavayssière Aude , Rychert Catherine , Harmon Nicholas , Keir Derek , Hammond James O. S. , Kendall J.‐Michael , Doubre Cécile , Leroy Sylvie
Published: September 2018

Imaging the lithosphere is key to understand mechanisms of extension as rifting progresses. Continental rifting results in a combination of mechanical stretching and thinning of the lithosphere, decompression upwelling, heating, sometimes partial melting of the asthenosphere, and potentially partial melting of the mantle lithosphere. The northern East African Rift system is an ideal locale to study these processes as it exposes the transition from tectonically active continental rifting to incipient seafloor spreading. Here we use S‐to‐P receiver functions to image the lithospheric structure beneath the northernmost East African Rift system where it forms a triple junction between the Main Ethiopian rift, the Red Sea rift, and the Gulf of Aden rift. We image the Moho at 31 ± 6 km beneath the Ethiopian plateau. The crust is 28 ± 3 km thick beneath the Main Ethiopian rift and thins to 23 ± 2 km in northern Afar. We identify a negative phase, a velocity decrease with depth, at 67 ± 3 km depth beneath the Ethiopian plateau, likely associated with the lithosphere‐asthenosphere boundary (LAB), and a lack of a LAB phase beneath the rift. Using observations and waveform modeling, we show that the LAB phase beneath the plateau is likely defined by a small amount of partial melt. The lack of a LAB phase beneath the rift suggests melt percolation through the base of the lithosphere beneath the northernmost East African Rift system.
Interrogating the protein interactomes of RAS isoforms identifies PIP5K1A as a KRAS-specific vulnerability
Authors: Adhikari Hema , Counter Christopher M.
Published: September 2018

In human cancers, oncogenic mutations commonly occur in the RAS genes KRAS, NRAS, or HRAS, but there are no clinical RAS inhibitors. Mutations are more prevalent in KRAS, possibly suggesting a unique oncogenic activity mediated by KRAS-specific interaction partners, which might be targeted. Here, we determine the specific protein interactomes of each RAS isoform by BirA proximity-dependent biotin identification. The combined interactomes are screened by CRISPR-Cas9 loss-of-function assays for proteins required for oncogenic KRAS-dependent, NRAS-dependent, or HRAS-dependent proliferation and censored for druggable proteins. Using this strategy, we identify phosphatidylinositol phosphate kinase PIP5K1A as a KRAS-specific interactor and show that PIP5K1A binds to a unique region in KRAS. Furthermore, PIP5K1A depletion specifically reduces oncogenic KRAS signaling and proliferation, and sensitizes pancreatic cancer cell lines to a MAPK inhibitor. These results suggest PIP5K1A as a potential target in KRAS signaling for the treatment of KRAS-mutant cancers.
Passive sensing around the corner using spatial coherence
Authors: Batarseh M. , Sukhov S. , Shen Z. , Gemar H. , Rezvani R. , Dogariu A.
Published: September 2018

When direct vision is obstructed, detecting an object usually involves either using mirrors or actively controlling some of the properties of light used for illumination. In our paradigm, we show that a highly scattering wall can transfer certain statistical properties of light, which, in turn, can assist in detecting objects even in non-line-of-sight conditions. We experimentally demonstrate that the transformation of spatial coherence during the reflection of light from a diffusing wall can be used to retrieve geometric information about objects hidden around a corner and assess their location. This sensing approach is completely passive, assumes no control over the source of light, and relies solely on natural broadband illumination.
Author Correction: High Resolution 31P NMR Spectroscopy Generates a Quantitative Evolution Profile of Phosphorous Translocation in Germinating Sesame Seed
Authors: Cai Honghao , Chuang Wei-Gang , Cui Xiaohong , Cheng Ren-Hao , Chiu Kuohsun , Chen Zhong , Ding Shangwu
Published: September 2018

A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.
USP4 positively regulates RLR-induced NF-κB activation by targeting TRAF6 for K48-linked deubiquitination and inhibits enterovirus 71 replication
Authors: Xu Chao , Peng Yang , Zhang Qin , Xu Xiao-Peng , Kong Xiang-Min , Shi Wei-Feng
Published: September 2018

Retinoic acid-inducible gene I-like receptor (RLR) is one of the most important pattern recognition receptors of the innate immune system that detects positive and/or negative stranded RNA viruses. Subsequently, it stimulates downstream transcription of interferon regulatory factor 3 (IRF3) and nuclear factor κB (NF-κB) inducing the production of interferons (IFNs) and inflammatory cytokines. Tumour necrosis factor receptor associated factor 6 (TRAF6) is a key protein involved in the RLR-mediated antiviral signalling pathway, recruiting additional proteins to form a multiprotein complex capable of activating the NF-κB inflammatory pathway. Despite TRAF6 playing an important role in regulating host immunity and viral infection, the deubiquitination of TRAF6 induced by viral infection remains elusive. In this study, we found that enterovirus 71 (EV71) infection attenuated the expression of Ubiquitin-specific protease 4 (USP4) in vitro and in vivo, while overexpression of USP4 significantly suppressed EV71 replication. Furthermore, it was found that EV71 infection reduced the RLR signalling pathway and enhanced the degradation of TRAF6. USP4 was also found to interact with TRAF6 and positively regulate the RLR-induced NF-κB signalling pathway, inhibiting the replication of EV71. Therefore, as a novel positive regulator of TRAF6, USP4 plays an essential role in EV71 infection by deubiquitinating K48-linked ubiquitin chains.
Elucidating white light emissions in Tm3+/Dy3+ codoped polyoxometalates: a color tuning and energy transfer mechanism study
Authors: Wu Hechen , Zhi Minna , Singh Vikram , Li Huafeng , Ma Pengtao , Niu Jingyang , Wang Jingping
Published: September 2018

A series of isomorphic Tm3+/Dy3+ codoped POM derivatives were successfully synthesized and characterized, and color-tunable emissions and the energy transfer mechanism have been studied.
Tri- and hexa-nuclear NiII–MnII complexes of a N2O2 donor unsymmetrical ligand: synthesis, structures, magnetic properties and catalytic oxidase activities
Authors: Mahapatra Prithwish , Drew Michael G. B. , Ghosh Ashutosh
Published: September 2018

Among two trinuclear and a hexanuclear NiII–MnII complexes, synthesized by using a Ni(ii) metalloligand of a N2O2 donor unsymmetrical ligand, only those containing a H2O molecule coordinated to the MnII center show very high catalytic oxidase activities.
Regioselective B–H/C–H activation and metal–metal bond formation induced by half-sandwich metals complexes at hydroxy-substitutedo-carboranes
Authors: Guo Shu-Ting , Cui Peng-Fei , Gao Yang , Jin Guo-Xin
Published: September 2018

A binuclear iridium complex, (Cp2*Ir2(CH2O)C2B10H8) (6), with a unique metal–metal bond has been synthesized and fully characterized.
Luminescent liquid crystalline hybrid materials by embedding octahedral molybdenum cluster anions with soft organic shells derived from tribenzo[18]crown-6
Authors: Ehni Philipp , Guy Kevin , Ebert Max , Beardsworth Stuart , Bader Korinna , Forschner Robert , Bühlmeyer Andrea , Dumait Noée , Roiland Claire , Molard Yann , Laschat Sabine
Published: September 2018

Crown ethers and their derivatives are versatile building blocks for the design of supramolecular materials.
An effective preparation of both 1,3-diketones and nitriles from alkynones with oximes as hydroxide sources
Authors: Chen Pei , Zhang Qian-Qian , Guo Jia , Chen Lu-Lu , Wang Yan-Bo , Zhang Xiao
Published: September 2018

An effective organocatalytic approach was developed to synthesize 1,3-diketones and nitriles from alkynones with oximes as hydroxide sources.
Questionable Use of “Nonorganic” in Norrix et al. (2017), “Estimating Nonorganic Hearing Thresholds”
Authors: Peck James E.
Published: September 2018

Purpose

The author of this letter to the editor expresses concern about the use of the word “nonorganic” as a source of confusion in terminology. Specifically, this is in response to the December 2017
American Journal of Audiology
article, “Estimating Nonorganic Hearing Thresholds Using Binaural Auditory Stimuli” (Norrix, Rubiano, & Mueller, 2017). “Nonorganic” is a source of confusion in terminology, because it can be used in two different ways. One way can mean to say there is no hearing loss. When used in this sense, it is illogical because it is qualifying a hearing loss believed not to exist. The second usage means there is a real disorder of function, but the organs themselves are not damaged and the basis is unknown. In the place of “nonorganic,” I have proposed “false hearing loss.” “Nonorganic” might carry a negative connotation that “false” might not. Many instances of false hearing loss stem from physical–mental health disturbances. Audiologists must stay alert to signs of psychosocial difficulty and refer for further evaluation accordingly.

Conclusion

“False” hearing loss is a more appropriate term than “nonorganic” hearing loss.
Pairing New Words With Unfamiliar Objects: Comparing Children With and Without Cochlear Implants
Authors: Lund Emily
Published: September 2018

Purpose

This study investigates differences between preschool children with cochlear implants and age-matched children with normal hearing during an initial stage in word learning to evaluate whether they (a) match novel words to unfamiliar objects and (b) solicit information about unfamiliar objects during play.

Method

Twelve preschool children with cochlear implants and 12 children with normal hearing matched for age completed 2 experimental tasks. In the 1st task, children were asked to point to a picture that matched either a known word or a novel word. In the 2nd task, children were presented with unfamiliar objects during play and were given the opportunity to ask questions about those objects.

Results

In Task 1, children with cochlear implants paired novel words with unfamiliar pictures in fewer trials than children with normal hearing. In Task 2, children with cochlear implants were less likely to solicit information about new objects than children with normal hearing. Performance on the 1st task, but not the 2nd, significantly correlated with expressive vocabulary standard scores of children with cochlear implants.

Conclusion

This study provides preliminary evidence that children with cochlear implants approach mapping novel words to and soliciting information about unfamiliar objects differently than children with normal hearing.
Augmenting microwave irradiation in MAS DNP NMR samples at 263 GHz
Authors: Purea Armin , Ell Benjamin , Reiter Christian , Aussenac Fabien , Engelke Frank
Published: September 2018

The magnetic microwave field strength and its detailed spatial distribution in magic-angle spinning (MAS) nuclear magnetic resonance (NMR) probes capable of dynamic nuclear polarization (DNP) is investigated by numerical simulations with the objective to augment the magnetic microwave amplitude by structuring the sample in the mm and sub-mm range and by improving the coupling of the incident microwave beam to the sample. As it will be shown experimentally, both measures lead to an increase of the microwave efficiency in DNP MAS NMR.
Analyzing calculation results of non-stationary axisymmetric thermoelasticity task for a circular isotropic plate
Authors: Shlyahin Dmitriy
Published: September 2018

The paper releases results of numerical calculation of axisymmetric dynamic thermoelasticity task for a fixed circular isotropic plate in case of temperature change on its front faces (boundary conditions of the 1st type). The calculated ratios are obtained by using the GL-theory of thermoelasticity (classical theory), which determines the dependence of the vector of heat flux on the velocity of change and temperature gradient. The mathematical model of the task in question includes differential equations of axisymmetric motion and thermal conductivity, formulated as regard to the component of the movement vector and the function of temperature change. Not self-adjoint system is investigated independently. For its solution, a mathematical apparatus technique of separation of variable in the form of finite integral transformations is used, that is transformations of Fourier, Hankel and generalized integral transformation (GIT). The constructed calculation ratios give an opportunity to define stress and strain state and character of distribution of a thermal field of rigidly fixed circular plate with arbitrary axially symmetrical temperature external influence. It is shown, that elastic inertial characteristics of a plate influence the law of change of movement over time only while investigating very thin plates at high-speed temperature impact.
Development of the FEM wheel-soil model for the design of flexible pavements
Authors: Daniel Ľuboš , Kortiš Ján , Decký Martin , Pisca Peter , Fabo Peter
Published: September 2018

The development of numerical models to simulate vehicle-road interaction problems is an important part of research into the design of roads. Current state of numerical tyre models, tyre-road contact algorithms and non-linear plastic soil material models have reached such a level that they could be difficult for practical civil engineers. The aim of the article is to design the spatial model of the wheel-road model using the FEM commercial software ADINA so that it can be used in practical road design too. The idea to create a rubber part of a tyre model as a combination of two layers of shell elements made of elastic materials is the most interesting. Contact wheel-road was modelled by the Constraint Function algorithm, which is part of the ADINA system. The first part of the article describes the model and experimental verification. In the second part there is a practical demonstration of application.
Finite elements with continuous stress fields in calculation of folded prismatic thin-walled rods and shells
Authors: Nazarenko Sergey , Blokhina Nina
Published: September 2018

The article deals with methods of creating a rectangular wall-beam finite element with eight degrees of freedom per node and continuous stress fields along the boundaries. This effect is achieved by specifying displacement fields in the plane of the element in forms similar to those in finite elements of Bogner, Fox, and Schmitt plate. The article provides algebraic expressions for displacement forms; methods of forming reaction and stress matrices are also considered. Test calculations carried out with the help of “Computational mechanics” FEM complex have proved high efficiency of the finite element analysis performed. A rectangular shell finite element with twelve degrees of freedom per node was developed as a combination of membrane finite element and Bogner, Fox and Schmitt plate element.
The method of local impact for the analysis of structures for progressive collapse
Authors: Saiyan Sergey , Paushkin Alexander
Published: September 2018

A method for calculation on the progressive collapse, in accordance with which the account of the fall of ceiling panels on the underlying floor when the loss of bearing capacity of vertical frame elements in the form of local impact determined by multiplying the weight plates on the dynamic coefficient determined by the drop height and static deflection. The calculation is carried out in several stages with the use of the LIRA SAPR software.
Numerical simulations of local and global buckling of hyperelastic tubes with different cross-sections
Authors: Kowalewski Łukasz , Jemioło Stanisław
Published: September 2018

The aim of the article is to present the application of finite element method (FEM) programs ABAQUS/Standard [1] and ABAQUS/Explicit [2] and the constitutive models of incompressible isotropic hyperelastic materials [3] in the analysis of local and global buckling of axially compressed shell elements made of elastomers. Three FEM models of tubes with the same length and initial stiffness have been created for this purpose. These are tubes with elliptical, square and triangular cross-sections. Three types of constitutive models of a rubber-like (elastomeric) material are used - with the polynomial function of elastic energy in the form of the model MV [3] and standard models of Neo-Hooke and Mooney-Rivlin [4]. No imperfections are introduced in the FEM models of the analyzed pipes. Numerical simulations of buckling of pipes are performed for two types of initial-boundary value problems, i.e. quasi-static and dynamic ones. It has been shown that the type of buckling depends on the cross-section of the pipe. The solutions of buckling of pipes modelling with different constitutive models are compared and good correlations of the results have been observed.
Dynamic analysis of railway track with vibration isolated booted sleepers
Authors: Smirnov Vladimir
Published: September 2018

The article deals with dynamic analysis of a railway track in a tunnel or on surface. Instead of concrete sleepers, booted ones are used, with additional under-sleeper pad made of elastomeric material. Introduction of additional elasticity in the railway track increases both the track elasticity and resultant service life and has some vibration isolation effect. Using the infinite length beam model with Winkler supports, the insertion loss of such a system is studied and appropriate pad stiffness is derived that can effectively reduce vibration arising from the railway track. Finite element (FE) model of the track is created in MSC Patran/Nastran software package, that helps to get an insight on the track behaviour under dynamic train excitation. Finally, both the analytical and FE models are verified with the measurement results obtained from an experimental modal analysis of an underground railway track with booted sleepers and polyurethane sleeper pads.
Influence of buildings aerodynamic characteristics on the calculation of infiltration losses results
Authors: Gribach Dmitry , Gribach Julia , Churin Pavel
Published: September 2018

This work is devoted to the problem of studying the energy efficiency of buildings, in particular - the definition of infiltration losses. The article presents the main methods for determining infiltration, which are presented in SP 50.133330.2012 and GOST R 55656-2013. However, the infiltration of air through the building envelope depends largely not only on the structural and planning features of the building, installed equipment, etc., but also on the environment, the climatic characteristics of the region in particular the effect of wind. In this regard, the staff of the Educational, scientific and industrial laboratory for aerodynamic and aeroacoustic tests of building structures of the NRU MGSU developed an addition to the existing established algorithms for calculating infiltration using the data of the experimental wind impact study, which is presented in this paper. The publication contains a description of the main stages of the implementation of this type of work.
Numerical analysis of beam rail bridges with random track irregularities
Authors: Podwórna Monika
Published: September 2018

The study focuses on dynamic analysis of composite bridge / track structure / train systems (BTT systems) with random vertical track irregularities taken into consideration. The paper presents the results of numerical analysis of advanced virtual models of series-of-types of single-span simply-supported railway steel-concrete bridges (SCB) with symmetric platforms, located on lines with the ballasted track structure adapted to traffic of high-speed trains.
An efficiency comparison of numerical implementation approaches of hyperelastic constitutive model in ABAQUS/Standard
Authors: Franus Aleksander , Kowalewski Łukasz
Published: September 2018

The main goal of the article is to compare a computational efficiency of different implementation of a hyperelastic material model in the ABAQUS/Standard v. 6.14 [1]. The software offers basically two ways to proceed, namely UMAT and UHYPER user subroutines [2]. The procedures are employed to implement an isotropic, compressible neo-Hookean material model [3]. Corresponding stored-energy function,
constitutive equations and the consistent tangent operator are presented. These are essential to program the subroutines. Some theoretical and numerical aspects of different implementation approaches are discussed. As examples, a tube under axial compression and a contact problem of disc are considered. On the basis of obtained results, selected aspects of computational efficiency and quality of solutions are compared.
Nonlinearity identification of Jesus Christ the King monument on the basis of modal parameters
Authors: Grosel Jacek , Marcinowski Jakub , Sawicki Wojciech , Wójcicki Zbigniew
Published: September 2018

The work presents an attempt to identify the nonlinearity of the structure using a simple autonomous vibration recorder. The vibrations were measured continuously for 4 days in three directions, which easily made it possible to record various load states of the structure. The analysis of the response spectra shows a change in the eigenfrequencies caused by the level of load, which is a measure of the non-linearity of the structure. The presented method is an interesting alternative to expensive multi-channel visit measurements, in which the equipment is compensated by the length of measurements
Prevention of progressive uncontrolled collapse of a high-rise building
Authors: Shumeyko Viktor , Karamysheva Anna
Published: September 2018

This article deals with the problem of security and resistance of the high-rise unique buildings to progressing collapse. The analysis of the causes of accidents and collapses of buildings and structures is carried out. The features of calculations and verification of structures for progressive destruction are explored. The analysis of researches and updating of norms on emergency prevention is carried out. The ways of solving the problems of buildings structural schemes resistance and structures to progressive collapse are shown. Particular attention is paid to the use of outrigger communication floors to improve the level of building survivability. Examples are reviewed from the high-rise buildings construction practice on the territory of the Russian Federation. Recommendations are given for the development of further research and practical application of measures to increase resistance to the progressive collapse of high-rise buildings.
Operating conditions of hydraulic structures and results of their multi-factor analysis
Authors: Romanov Alexey , Evdokimov Sergey , Orlova Alla
Published: September 2018

Nowadays, the state of Zhiguli Hydroelectric Station (HS) and its main hydraulic structures is controlled by observation of control and measuring equipment installed on these structures. There are systematic inspections and surveys carried out by both the hydroelectric power station personnel and by invited experts. The last analysis of the state of HS and its hydraulic structures was made in 1991. Since that time, a computer-based information and diagnostic system for monitoring the state of hydraulic structures has been introduced at HS. This system introduction caused the need to pay more serious attention to the reliability of the results obtained by means of control and measuring equipment, because the system monitored the condition of all hydraulic structures according to these results. Thus, the purpose of the research is to perform a multi-factor analysis of HS state and its hydraulic structures according to field studies results of all the devices installed in water-retaining structures. The results show impervious elements of HS underground circuit are not effective enough for specific geological conditions in terms of clearing the filtration head. The main drop of water head in the base occurs on HS building upper cutoff, i.e. in this zone there is a maximum filtration gradient, which is very dangerous. This process should be carefully monitored. It was revealed that several piezometers in the base do not work or their indications are not reliable, therefore it is necessary to repair and, in some cases, replace them. In future, it is necessary to equip main piezometers of HS with remote water level measuring sets and to make an automated system of condition monitoring.
Stand-by spillways in phreatic dams
Authors: Mikhasek Andrey , Rodionov Maxim , Malyugin Nikolay , Klimov Artem
Published: September 2018

Hydraulic structures operation is always connected with accident risks. The authors analyzed emergency situations which affected dams located on the territory of the USA and Russia. This analysis showed that the most dangerous accident which took place at hydroelectric complexes is an overfall through the crest of the dam accompanied with the formation of washouts and blow-out waves. The most striking example here is the accident at St. Francis dam. According to most researchers, its main cause was the human factor. To reduce economic losses which are due to an accident on the hydro-technical construction and to reduce the risk of human influence, the authors propose to use a stand-by spillway in the body of a phreatic dam. For this purpose, they introduce two constructions. The first construction has a melting insert and a spillway channel fastening made of synthetic materials. The second one has filtering covering of a crest and a downstream slope made of coarse-pored concrete. The researchers perform physical and numerical modeling of the developed structures to compare them. On the basis of laboratory experiments and calculations in the program complex, they obtain discharge coefficient values for various spillways, which can be later used for calculating spillway capacity as well as for its construction.
The problem solution of deformable power surfaces from anisotropic material interaction in elements of structure constructions
Authors: Ivanov Boris , Pischulev Alexander , Reazanova Galina
Published: September 2018

The paper presents an analytical method of examining deformable power surfaces from anisotropic material and their interaction. Materials with anisotropic properties are often used in the elements of transport structures as well as in building construction [1-7]. Most frequently the following materials are used in construction: rolled metal products, products obtained by drawing, wires of various kinds, reinforced concrete structures, bridge bearings, supporting walls and other structures, composite materials, plastics and other [8-13]. For forecasting strength properties of structures strength joints and their behaviour under various external influences, the authors developed a method of calculation of their stress-strain behaviour [9]. This method can be applied to strength joints of complex form made of anisotropic elastic elements under specific conditions of deformation of the contact surfaces.
Analysis the effects of lightweight concrete in the middle layer of multi-layered reinforced concrete structures on the stress-strain state using the finite element method
Authors: Korol Elena , Dinh Tho Vu , Huy Hoang Nguyen
Published: September 2018

The development of methods for the calculating reinforced concrete structures covers a wide range of issues, including the expansion of the application of new innovative materials such as concrete and reinforcement. For usage in the practice of modern construction of multilayer structures made of concrete with different physic-mechanical characteristics, it is compulsory to conduct numerical studies of the stress-strain state of these structures under different types of loading. This article presents an analysis of the influence of the relations between the initial elastic modulus of the outer and middle layers for the stress-strain state and the deflection of three-layer reinforced concrete structures using the finite element method in the program ANSYS Mechanical. Numerical modeling allows comparing the obtained results and building theoretical dependences in a wide range of specified parameters for the construction of sections of multilayer reinforced concrete elements. The obtained scientific results enable to determine rational parameters for modeling various structural solutions of multilayer reinforced concrete structures. This would limit the number of actual test samples, increasing the efficiency of the experiment.
Creep of Concrete According to Creep Prediction Models and Own Research
Authors: Wypych Agnieszka , Klempka Krzysztof , Jędrzejczak Marek
Published: September 2018

The paper presents the currently used procedures for calculating the deformation of concrete and creep coefficients. Laboratory research was conducted on the creep of concrete. Creep coefficients were calculated on the basis of experimentally obtained data and later compared to the ones acquired by using previously demonstrated procedures. In the case of the sample subjected to the influence of compressive stress and not exceeding the limit of linear creep, the models in Eurocode 2 and fib Model Code 2010 did not correspond to the experimentally obtained data.
Analysis of window model accuracy and its influence on the results compared to the measurement
Authors: Juras Peter
Published: September 2018

This paper deals with differences between modelled window sash and frame in the Therm software and comparison with measured values in the pavilion type laboratory. In this laboratory are three different windows evaluated since 2011. These windows are suitable for low-energy or passive houses. Two different plastic based windows were modelled and the temperatures were compared to the real measurement with different outdoor temperatures.
To the determination of heat exchange conditions near the inner surface of walls with reflective thermal insulation from aluminium foil
Authors: Umnyakova Nina , Gandzhuntsev Mikhail
Published: September 2018

Materials with a low coefficient of surface radiation intensively reflect the radiant component of the heat flux and reduce heat losses through the building envelope. When designing building structures with reflective thermal insulation it is necessary to evaluate the efficiency of its application. However, at present there are no methods for calculating the value of thermal losses through external walls in the presence of reflective thermal insulation on internal surface of the wall, as well as there are no data on the values of heat transfer coefficients at the inner surface of building envelope with reflective thermal insulation. In this regard, in the climatic chambers of NIISF RAABS, complex thermal engineering studies were carried out. For this a cellular concrete wall 2,8 x1,2 m was put up into the chamber with reflective thermal insulation on the inner surface and without it. The obtained results of experimental studies, presented in the work, allowed obtaining numerical values of heat transfer coefficients at the inner surface of walls with reflective thermal insulation, and use the obtained data in further calculations.
THE REFINED THEORY OF ELASTIC PLATES AS ASYMPTOTIC APPROACH OF 3D PROBLEM
Authors: Rogacheva Nelly
Published: September 2018

The refined theory of elastic thin and thick plates is constructed by the asymptotic method for reducing three-dimensional (3D) equations of linear elasticity to two-dimensional ones without the use of any assumptions. The resulting refined theory is much more complicated than the known classical Kirchhoff theory: the required values of the refined theory vary in thickness of the plate by more complex laws; the system of partial differential equations of the refined theory has a higher order than the system of equations of the classical theory. A comparison of the obtained theory with the popular refined theory of Timoshenko and E. Reissner, taking into account the transverse shear deformation is made. It is shown that the inclusion only of the transverse shear deformation is insufficient. In addition to the transverse shear deformation, many additional terms having the same order as the transverse shear deformation must be taken into account.
Systems with rigidity cores and high-rise buildings outriggers
Authors: Shumeyko Viktor , Karamysheva Anna
Published: September 2018

The article deals with the problems of applying systems with stiffeners and outriggers for high-rise buildings. The analysis of various designs is carried out, the features of their work are specified, the advantages and disadvantages are identified, the areas of their application. When designing and building high-rise buildings, it is necessary to ensure their resistance to lateral loads arising from wind or seismic influences. The article shows the ways of solving this problem based on various constructive systems. Particular attention is paid to the use of outrigger link systems for providing high-rise buildings rigidity. Various variants of outriggers are investigated in the paper, their advantageous sides and disadvantages are compared, the types of their optimal solutions are determined. A number of technical and economic problems of high-rise buildings with stem systems and outriggers, which have not been sufficiently investigated, are mentioned. Recommendations are given on the use of systems with stiffeners and outriggers to increase the rigidity and lateral stability of high-rise buildings.
Principles of process modeling of the heat supply systems operation
Authors: Doroshenko Anna , Yusupova Anastasiya
Published: September 2018

The problem of process modeling of heat supply systems operation with the appropriate of the special software is presented in the article. The purpose of the simulation is to identify the most likely and dangerous accidents, the quantitative and qualitative assessment of them, the frequency of their occurrence, the size of the damage, etc. The implementation of the solution presented in the work is already useful at present to improve the design and further operation of heat supply systems, and as a consequence also for consumers of thermal energy. The use of simulated modeling of heat supply system operation processes significantly reduces the strength calculation time, allows simulating various pipeline route configurations, performing their comparative analysis, and choosing optimal characteristics for the simulated system.
Application of the cartographic method of research for the detection of the dangerous zones of mining industrial territories
Authors: Prokopov Albert , Zhur Vyacheslav , Medvedev Andrey
Published: September 2018

The collection, analysis and processing of information on hazardous geological processes in the city of the Shakhty of the Rostov region was carried out. On the map of the city, zones of spreading loessial subsidence soils, zones of mining operations at relatively shallow depths and the territory of man-made flooding are constructed. The areas of merging of two or more dangerous factors affecting the normal operation of mining areas are identified.
Possibilities of continual Measurement Alignment
Authors: Chromčák Jakub
Published: September 2018

The current legislative decree on Slovak republic is in the line with the applicable European Union standards and is based on the original legislative decrees supplemented and updated to meet the requirements of the European standards. The main European standard for track geometry is EN 13848. This standard specifies the requirements for aligning track geometry parameters that present the quality of track. Quality can be measured by different measuring devices mounted on tracking vehicles. This norm is applied to all track parameters. Each parameter is defined hand in hand with the requirements for its´ measuring, methodology of processing and interpreting of the results. [1] That are the reasons, why there is not only needed to be focus of measurement technology, but on the processing and alignment as well. It is also necessary to focus to an inertial precision of the system. There are few problems, such as impossibility of having the identical detailed survey points on a rail superstructure.
Calculation of foundation settlement on a overconsolidated base
Authors: Ter-Martirosyan Armen , Luzin Ivan
Published: September 2018

The article presents experimental and theoretical bases of overconsolidated soils deformation. The effect of preliminary soil compaction on its deformation under conditions of compression is shown. Based on this dependence, a method is proposed for calculating the foundation settlement on a overconsolidated base, taking into account the pre overburden pressure. The obtained method is compared with the results of the problem solution by the finite element method.
Settlement and bearing capacity of the circular foundation
Authors: Ter-Martirosyan Zaven , Sidorov Vitalii
Published: September 2018

In process of designing foundations of circular form in plane, as well as bored piles of circular cross section, there is important to quantify the stress-strain state and the bearing capacity of the soils interacted with the foundations, as well as under the toe of piles. The article presents the formulation and solution of the problem of determining the initial critical load at the base of the circular foundation, which is also relevant for the design case of the soil under the toe of a circular bored pile. It is shown that the condition of limiting equilibrium arises both under the center of the loaded area and on the contour of the circular loading area, and primarily on the contour. A comparative estimate showed that the ratio of the initial critical load to the base soil of the circular foundation under the center of the site is 2 times greater than the corresponding load for the point at the edge of the site.
The management of stress-strain state of the bases for stabilizing uneven settlements
Authors: Ter-Martirosyan Armen , Sidorov Vitalii
Published: September 2018

One of the actual problems of modern construction is the development of methods for managing the stress state of the soil bases for its use in conditions favorable to the construction. Also, soil state management methods are used to protect existing buildings and structures from the negative impacts of new construction. One of the methods that can affect the stress-strain state is the technology of compensatory injection. The essence of the method consists in injecting an extra volume of a slowly hardening solute into the soil base placed in the path of propagation of an impact wave transmitted through the soil. Controlling the volume of the pumped material, a calculated stress-strain state of the soil massif is created, which ensures safe construction. The article contains theoretical foundations describing the processes and examples of numerical simulation of control processes of the stress-strain state of the base when tunneling under the building.