bluuebunny/crossref_metadata_2025_split huggingface dataset:
Method for constructing fundamental equation of state that satisfies the scaling theory and applicable for substances insufficiently explored in the critical point vicinity
Authors: Rykov S V , Kudryavtseva I V , Rykov V A 
Published: November 2019

Abstract
Here, the authors discuss the problem of describing the equilibrium properties of a substance in the vicinity of the critical point on the basis of the fundamental equation of state (FEoS) of a liquid and a gas in the absence of experimental information about the calorific properties of a given substance in this field of state parameters. FEoS has the following characteristics: in the region of low densities, FEoS transforms to the virial equation of state; in the asymptotic vicinity of the critical point, FEoS meets the requirements of the scaling theory of critical phenomena. The method is based on a new representation of the scaling hypothesis based on the Scofield–Litster–Ho linear model (LM), the Benedek hypothesis and the Lysenkov–Rykov ratio (LR) which establishes the relationship between LM parameters and the real liquid using the Pokrovsky transformations. Testing of the proposed method for constructing FEoS has been carried out using the example of describing the equilibrium properties of argon. It has been ascertained that the use of the LR ratio has allowed, firstly, reducing the number of individual FEoS parameters and, secondly, excluding the data about isochoric heat capacity CV
related to the critical point wide vicinity from the calculation scheme.
Heat of fusion of rhenium from first-principle simulations and the Richards–Tammann relation
Authors: Minakov D V , Levashov P R , Paramonov M A 
Published: November 2019

Abstract
We present quantum molecular dynamics calculations of thermophysical properties of expanded solid and liquid rhenium in the vicinity of melting. The dependence of specific enthalpy on temperature and the value of the heat of fusion is in good agreement with dynamic heating experimental data and do not confirm the high value of the enthalpy of fusion obtained using the Richards-Tammann relation.
Ontology-based methods of thermophysical data integration
Authors: Kosinov A V , Erkimbaev A O , Zitserman V Yu , Kobzev G A 
Published: November 2019

Abstract
The article describes new technologies and tools used for drastic upgrading the database THERMAL, one of the oldest thermophysical databases. The database upgrade project provides for a essential expansion of its volume and service capabilities, as well as the possibility of permanently updating the conceptual scheme with the advent of new objects and notions. The developed technology ensures the conversion of old and newly loaded documents to a common semantically integrated infrastructure. In accordance with the project, the whole process of creating data and their further support includes three stages: conversion of all data, regardless of format, to a structured JSON document; creation of the ontology repository and the binding of terms from a JSON documents with the classes of ontologies for semantic integration; tuning of the high-performance computing platform to manage an extensive collection of JSON files and perform complex searches.
High resolution technique for studying the energy exchange near the shock wave front
Authors: Ziborov V S , Efremov V P , Kuznetsov M M , Fortov V E , Rostilov T A , Shumova V V 
Published: November 2019

Abstract
The structure and properties of the shock wave front propagating in binary gas was investigated by multi-channel emission spectroscopy and electrostatic probe located in a flow core. The experimental conditions allowed to consider the energy exchange processes in the front like interaction of isolated cold heavy molecules Mo (CO)6 with shock wave front of light noble gas (He, Ar). Measurements were carried out in a weak incident shock waves (Mach number M = (2.5 ÷ 3.6) in the high vacuum shock tube at equilibrium temperature of 850–1400 K and pressure of 0.1–1.1 bar, Mo(CO)6 concentration 5.0 × 1013−3.0 × 1014 cm−3. An influence of heavy molecules on thermodynamics was negligible and free paths of “heavy” molecules between collisions “heavy-heavy” were longer then 1 mm. Nearby shock wave front the conductivity and the electron precursor zones caused by ionization and charge separation were detected and measured. The dependence of probe current on the energy of pair collisions was found. The length of charge separation in SW front was measured and free electrons concentration was estimated.
Analysis of behavior of soil compressibility of the lacustre deposit of Tunja, Colombia
Authors: Jiménez O J , Prieto L F , Pacheco E J 
Published: November 2019

Abstract
This article contains the research results in the evaluation of a mathematical model for the determination of the compressibility coefficient of the soils of the lacustrine deposit of the city of Tunja, Colombia, through the execution of one-dimensional consolidation tests, complementary with soil classification tests characterizing its index properties, stories as a ratio of voids, porosity, specific gravity and consistency limits, where a selection of different sites located covering the general area of the lake deposit is made, taking soil samples unaltered at different depths, where processed these soil samples for later geotechnical evaluation. A series of mathematical expressions were generated to determine the approximate shape of the compression coefficient, depending on the index properties, discretizing according to the type of soil, where for this case clays of low and high plasticity were found as silt of high plasticity. These models will serve as a tool to determine the approximate and preliminary form of the magnitude of the main compressibility coefficients.
Dimerization and low-dimensional magnetism in nanocrystalline TiO2 semiconductors doped by Fe and Co
Authors: Yermakov A , Boukhvalov D , Uimin M , Mesilov V , Minin A , Galakhov V , Korolyov A , Volegov A , Rosenfeld E , Gubkin A , Molochnikov L 
Published: November 2019

Abstract
The report is devoted to an analysis of the structural and magnetic state of the nanocrystalline diluted magnetic semiconductors based on TiO2 doped with Fe and Co atoms. Structural and magnetic characterization of samples was carried out using X-ray diffraction (XRD) analysis, transmission electron microscopy (TEM), X-ray absorption spectroscopy (XAS), electron paramagnetic resonance (EPR) spectroscopy, SQUID magnetometry, and the density functional theory (DFT) calculations. Analysis of the experimental data suggests the presence of non-interacting paramagnetic Fe3+ and Co2+ ions in the high-spin state and negative exchange interactions between them. The important conclusions is that the distribution of dopants in the TiO2 matrix, even at low concentrations of 3d-metal dopant (less than one percent), is not random, but the 3d ions localization and dimerization is observed both on the surface and in the nanoparticles core. Thus, in the paper the quantum mechanical model for describing the magnetic properties of TiO2:(Fe, Co) was suggested. The model operates only with two parameters: paramagnetic contribution of non-interacting 3d-ions and dimers having different exchange interactions between 3d magnetic carriers.
Nonstationary self-gravitating configurations of scalar and electromagnetic fields
Authors: Tchemarina Ju V , Alekseeva E G , Tsirulev A N , Nuraliev N K 
Published: November 2019

Abstract
Mathematical modeling of gravitating configurations of physical fields is one of the priority directions of the modern theory of gravity. Most of the exact solutions constructed within the framework of the general relativity are static or stationary configurations. This is due to the objective complexity of solving the Einstein equations under the assumption of nonstationarity. We present an approach to constructing nonstationary configurations of a spherically symmetric nonlinear real scalar field and the electromagnetic field, which are assumed both to be minimally coupled to gravity. It is based on the isolation of one invariant equation written in terms of the characteristic function and scalar field potential. Using the proposed method, an exact nonstationary solution with a nontrivial topology of space-time will be constructed.
Model compound mixtures for studying the main trends of volatile organic compounds conversion in processes of air cleaning by pulsed discharges
Authors: Filatov I E , Uvarin V V , Kuznetsov D L 
Published: November 2019

AbstractTo study the process of removing volatile organic compounds (VOCs) vapors from air flow by the action of pulsed discharge plasma, it is proposed to use specially selected model mixtures of components. The components of these mixtures are in equal conditions, which makes it possible to measure the relative reactivity with high accuracy without using high-speed analysis techniques. Using three groups of the mixtures, it was shown that substances with different functional groups react with different components of the discharge plasma. Multifunctional VOCs react with active forms of nitrogen and oxygen. Halogenated compounds are mainly removed due to electron attachment processes, and unsaturated compounds are removed by reaction with ozone.
The use of magnetron sputtering to synthesis boride neutrons-absorbing coatings
Authors: Larionov A S , Zhakanbayev E A , Karpikov A N , Volodin V N , Chekushina L V 
Published: November 2019

Abstract
The paper describes the development of methods for the synthesis of a neutron-absorbing coating based on the B-Ti system. It is shown that this approach can significantly reduce the thickness of the coating with a satisfactory value of the neutron absorption coefficient. The optimal modes of coating synthesis by DC-magnetron sputtering are determined.
Rheological properties of naturally structured and homogenized sod-podzolic soil and typical chernozem under various land use
Authors: Klyueva V , Khaidapova D 
Published: November 2019

Abstract
The rheological parameters of naturally structured and homogenized sod-podzolic soils and typical chernozems under various land use were studied by the amplitude sweep test. The range of elastic behavior at low loads in which the microstructure does not break down (LVE-range) and the strength (stability) of natural structural bonds (storage modulus in this range) in naturally structured samples are greater than in homogenized samples but homogenized soils have a bigger range of plastic behavior (Crossover) at measurement conditions. Differences in rheological behavior between horizons are more pronounced for naturally structured soils. However, further studies and selection of optimal measurement conditions are necessary for better understanding of rheological behavior of naturally structured soils.
Analysis of spatial humus distribution in virgin and arable Chernozems in the eroding landscapes
Authors: Smirnova L G , Shapovalov A S , Ukrainskiy P A , Mikhailenko I I , Smirnov G V 
Published: November 2019

AbstractA statistical assessment of data on the content and spatial distribution of humus in virgin and arable Chernozems on slopes in the south of the forest-steppe zone of the Central Russian Upland was performed. The greatest number of statistically significant differences between arable and virgin Chernozems was found for the upper soil layer (0–20 cm). At the depths of 200–40, 600–80, and 800–100 cm, the differences between these two groups of soils regarding the humus content were statistically insignificant. Data on the spatial distribution of humus in the layer of 00–20 cm indicated that high- and medium-humus Chernozems (>9.0 and 6.00–9.0% of humus) predominate on the slopes under virgin vegetation; medium-humus Chernozems with small patches of low-humus (<4%) Chernozems compose the soil cover of the slopes under arable fields.
Participation of cadmium (ll) and copper (ll) ions in intermolecular forces of humic acids in solutions
Authors: Tikhonov V , Drozdova O , Karpukhin M , Demin V 
Published: November 2019

Abstract
Using membrane ultrafiltration and size exclusion chromatography (SEC), the effect of Cd (II) and Cu (II) ions on the molecular weight distribution of humic acids (HA) in solution was investigated. It was shown that Cu (II) ions, unlike Cd (II), can take part in the formation of supramolecular HA associates (> 10 kDa).
Pollutant Emission and Energy Consumption Analysis of Environmental Protection Facilities in Ultra-Low Emission Coal-Fired Power Units
Authors: Mingchao Jiang , Bing Li 
Published: November 2019

Abstract
A total of 30 coal-fired power units in China were assessed with regard to the effects of ultra-low emission retrofitting on pollutant emission and on the consumption of both energy and materials of environmental protection facilities. SO2, NOx, and dust emission were compared, together with the energy and material usage of desulfurization and selective catalytic reduction denitrification facilities before and after retrofitting. Following retrofitting, the average SO2, NOx, and dust emission performance were 0.042, 0.1, and 0.004 g/(kW·h), respectively, all of which are much lower than the current averages of coal-fired units in the United States. The average station service power consumption rate of desulfurization facilities increased from 1.12 to 1.29% following retrofitting, while limestone usage increased from 112.6 to 155.5 kg/(104 kW·h) and liquid ammonia consumption increased from 4.1 to 4.31 kg/(104 kW·h).
Research on Solution of Ship Low Sulphur Fuel based on IMO Sulphur Limitation Regulation
Authors: Wang Zihui , Zhang Honggang , Gan Xuezhen 
Published: November 2019

Abstract
In recent years, the density of both domestic and international routes is generally at a high level. Intensive ship navigation frequency and ship number operations have brought many sulfur oxides, nitrogen oxides and other particulate matter to the port, resulting in increasingly serious port pollution, which has become one of the main sources of air pollution, and ship exhaust emissions are causing environmental pollution in coastal areas. As well as the main sources of port pollution, the pollution problem should not be underestimated. “Air pollution from maritime transport causes about 1450 to 37500 premature deaths each year and brings short-term and long-term changes to the climate system,” the IMO reiterated in response to the seriousness of the problem that all ship fuels should meet sulfur content below 0.5% starting from January 1,2020[1]. In view of this regulation, this paper systematically analyses three low-sulfur fuel solutions at present, and summarizes the optimal solution from the aspects of economy, feasibility and sustainability, and the comparative study of three different types of the optimal solution is carried out, that is, to refine the optimal solution again and put forward the applicable technology in the optimal solution.
Return Period of Low Tide Level in the Yangtze Estuary based on Nonstationarity Analysis
Authors: Zhou Yicen , Li Qi , Liu Shuguang , Lou Sha 
Published: November 2019

Abstract
Due to the influence of climate change and human activities, stationarity of hydrologic time series is being challenged. The Yangtze Estuary is a region with highly developed hydraulic structures and shipping. Stationarity analysis of water level in the Yangtze Estuary is of great significance. In this study, the return period of low tide level in the Yangtze Estuary is estimated with nonstationarity considered. Conventional frequency analysis and the time-varying moment method are used to analyze the annual minimum tide level (AMTL) records of Wusongkou Station and Baozhen Station on the basis of temporal change analysis. Abrupt changes are detected at 1996 and 1990 for Wusongkou Station and Baozhen Station separately. The GEV distribution with linear time-varying parameter fits best for Wusongkou Station and Baozhen Station. The AMTL series of both stations reveal a slight increasing trend. The 100-year low tide level of Wusongkou Station is approximately 0.261 meters, which is about -0.041 meters for Baozhen Station. The corresponding return period is 150 years and 119 years respectively, which indicates the existing channel standard more secure and the recalculation of design water level necessary in the Yangtze Estuary.
Study on Water Related Music Works—A Case Study in Gaomei Wetland
Authors: Chen Chen , Huang Guangwei 
Published: November 2019

Abstract
Wetland environment plays an essential role in integrated watershed management and has been studied from different perspectives ranging from ecology to tourism. However, there is still little research on the relationship between wetland environmental characteristics and music works. On the belief that music works can be part of wetland environment conservation, the present research explored the possibility to characterize wetland environments with music works. It was focus on the perception of local residents towards to a wetland in terms of music works. It was a case study in Gaomei Wetland, Taiwan, which is a coastal wetland. There are 3 hypotheses in this work: (1) there is a significant difference in the music types selected for the image of the wetland by the locals in different ages and living with different distances from the wetland; (2) there a significant difference in the music speed and rhythm selected by the locals in different ages and living with different distances from the wetland; (3) there is a preference on the music segments by the locals who are older and living closer to the wetland. Through survey conducted on-site, some interesting findings were obtained and presented in this paper.
Leaf trichomes in Metrosideros polymorpha can contribute to avoiding extra water stress by impeding gall formation
Authors: Amada Gaku , Kobayashi Keito , Izuno Ayako , Mukai Mana , Ostertag Rebecca , Kitayama Kanehiro , Onoda Yusuke 
Published: November 2019

AbstractBackground and AimsPlants inhabiting arid environments tend to have leaf trichomes, but their adaptive significance remains unclear. Leaf trichomes are known to play a role in plant defence against herbivores, including gall makers. Because gall formation can increase water loss partly through increased surface area, we tested the novel hypothesis that leaf trichomes could contribute to avoiding extra water stress by impeding gall formation, which would have adaptive advantages in arid environments.MethodsWe focused on Metrosideros polymorpha, an endemic tree species in the Hawaiian Islands, whose leaves often suffer from galls formed by specialist insects, Hawaiian psyllids (Pariaconus spp.). There is large variation in the amount of leaf trichomes (0–40 % of leaf mass) in M. polymorpha. Three gall types are found on the island of Hawaii: the largest is the ‘cone’ type, followed by ‘flat’ and ‘pit’ types. We conducted laboratory experiments to quantify the extent to which gall formation is associated with leaf water relations. We also conducted a field census of 1779 individuals from 48 populations across the entire range of habitats of M. polymorpha on the island of Hawaii to evaluate associations between gall formation (presence and abundance) and the amount of leaf trichomes.Key ResultsOur laboratory experiment showed that leaf minimum conductance was significantly higher in leaves with a greater number of cone- or flat-type galls but not pit-type galls. Our field census suggested that the amount of trichomes was negatively associated with probabilities of the presence of cone- or flat-type galls but not pit-type galls, irrespective of environmental factors.ConclusionOur results suggest that leaf trichomes in M. polymorpha can contribute to the avoidance of extra water stress through interactions with some gall-making species, and potentially increase the fitness of plants under arid conditions.
Fiscal Policy with Limited-Time Commitment
Authors: Clymo Alex , Lanteri Andrea 
Published: November 2019

Abstract
We propose a theory of optimal fiscal policy with ‘Limited-Time Commitment’. In our framework, successive governments have commitment only over finite, overlapping horizons. We first show that key results in the ‘Full Commitment’ literature can often be sustained with a single period of commitment. We then solve a calibrated model in which ‘Limited-Time Commitment’ fails to implement the ‘Full Commitment’ policy, and find that one year (three years) of commitment recovers one-third (two-thirds) of the welfare losses relative to ‘No Commitment’. Finally, we investigate the trade-off between commitment and flexibility in response to shocks.
Comparative efficacy and safety of antithrombotic therapy for transcatheter aortic valve replacement: a systematic review and network meta-analysis
Authors: Zhu Yuexin , Zou Ziyuan , Huang Yusi , Zhang Lei , Chen Huiting , Li Yang , Liu Cheng , Li Xinrui , Xu Dingli , Zeng Qingchun 
Published: November 2019

Abstract

OBJECTIVES
We sought to determine the optimal antithrombotic therapy after transcatheter aortic valve replacement.

METHODS
Related scientific databases were searched until December 2018. We conducted a pairwise and a network meta-analysis within a frequentist framework, measuring 30-day bleeding, stroke and all-cause mortality. The surface under the cumulative ranking (SUCRA) curve was estimated to rank the therapies. The Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach was performed. The protocol was registered with PROSPERO (CRD42018111163).

RESULTS
Eight studies comprising 2173 patients were analysed. The risk of 30-day bleeding was higher for dual antiplatelet therapy (DAPT) than single antiplatelet therapy (SAPT) [odds ratio (OR) 1.90 (1.10–3.28); P = 0.02], whereas there was no difference in the risk of 30-day stroke [OR 1.27 (0.38–4.20); P = 0.69] and mortality [OR 1.46 (0.67–3.22); P = 0.34] between DAPT and SAPT. In the network meta-analysis, DAPT + oral anticoagulant (OAC) increased the risk of 30-day bleeding compared with SAPT [OR 6.21 (1.74–22.17); P = 0.005], DAPT [OR 3.27 (1.04–10.32); P = 0.043], SAPT + OAC [OR 4.87 (2.51–9.45); P &lt; 0.001] and OAC [OR 14.4 (1.3–154.7); P = 0.028]. Additionally, patients receiving DAPT + OAC had the highest risks for 30-day bleeding (SUCRA 1.0%). OAC seemed to be superior to SAPT and DAPT in terms of 30-day bleeding (SUCRA OAC: 86.3%, SAPT: 72.3%, DAPT: 32.3%) and stroke (SUCRA 54.2%, 47.4%, 40.5%), but not mortality (SUCRA 69.6%, 74.1%, 43.4%).

CONCLUSIONS
There is a trend towards less bleeding with the application of SAPT, but no mortality benefit with the application of DAPT is shown. The comparison of SAPT, DAPT and OAC shows that OAC may improve the balance between stroke and bleeding, which can reduce the risk of mortality. In addition, the application of DAPT + OAC was ranked the worst amongst all treatment modalities and should be avoided due to an increased risk of bleeding.

Clinical trial registration number
PROSPERO (International Prospective Register of Systematic Reviews, CRD42018111163).
Complicated chylous pericardial and thoracic effusion as the first clinical manifestation of thoracic lymphatic malformation
Authors: Wiesner Sigrid , Uller Wibke , Hofmann Hans-Stefan , Ried Michael 
Published: November 2019

Abstract
Lymphatic malformations are benign focal proliferations of lymphatic vessels with a congenital origin. We present a case of an 18-year-old patient with post-traumatic chylopericardium and recurrent left-sided chylothorax, who was unresponsive to a variety of therapeutic measures until he was diagnosed with a complicated thoracic lymphatic malformation.
Topology of the Nodal Set of Random Equivariant Spherical Harmonics on 𝕊3
Authors: Jung Junehyuk , Zelditch Steve 
Published: November 2019

Abstract
We show that real and imaginary parts of equivariant spherical harmonics on ${{\mathbb{S}}}^3$ have almost surely a single nodal component. Moreover, if the degree of the spherical harmonic is $N$ and the equivariance degree is $m$, then the expected genus is proportional to $m \left (\frac{N^2 - m^2}{2} + N\right ) $. Hence, if $\frac{m}{N}= c $ for fixed $0 &lt; c &lt; 1$, then the genus has order $N^3$.