bluuebunny/crossref_metadata_2025_split huggingface dataset:
In-service performance of hybrid geopolymer binders based class F fly ash
Authors: Kozhukhova N I , Teslya A Yu , Kozhukhova M I , Zhernovsky I V , Yermak S N , Ogurtsova Yu N 
Published: June 2019

Abstract
Production of high-performance construction materials, meeting the requirements of construction process when development of up-to-date buildings and structures is very relevant and requires the usage of effective polycomponent binding systems, including geopolymers This work studied mechanical performance, as well as strength, water absorption and water resistance of portland cement – Class F fly ash – NaOH hybrid geopolymer binding system. The bench scale testing was conducted on different mixes, including regular portland cement-based and Class F fly ash-NaOH geopolymer binders used as reference compositions. The developed hybrid binders demonstrated, that incorporation of portland cement up to 40% as a modifying agent, reduces the formation of water soluble mineral phases such as sodium carbonates and hydroxycarbonates in low reactive class F fly ash geopolymer binders. It was found, that the presence of portland cement in the system positively affects strength development and noticeably reduces water absorption and improves water resistance of the developed binders, which is related to formation of water resistant and stable calcium hydrosilicate phases (C-S-H)
Investigation of cavitation and vibration processes in the technology of treatment of the contaminated liquids
Authors: Sevostyanov V S , Belykh M M , Sevostyanova K I 
Published: June 2019

Abstract
This article considers the problems of treatment of contaminated liquids. Scientific works of home and foreign authors were analysed and according to this analysis it was made the conclusion. Experimental studies of the process of treatment of the contaminated liquids, in which the cavitation process in the technology of treatment of the contaminated media were investigated, as well as the process of treatment of the contaminated media in a vibration and centrifugal unit . As a result of the research, it was discovered that the cavitation method can be effectively used to treat water from heavy mechanical impurities, which makes it possible to carry out further filtration in fine filters. A vibration-rotary unit, developed in Belgorod State Technological University n.a. V G Shukhov, (Russia) at the Department of Technological Complexes, Machines and Mechanisms, was taken as a technical object, where experimental investigation of treatment of the contaminated liquids was carried out. It was also carried out the research of the stepwise process of treatment of the contaminated liquids in the developed unit. On the basis of these results the authors propose to use a stepwise method of treatment of liquid media: cavitation effect - for the preliminary phase of treatment and vibration-rotary effect – for the final stage of treatment.
Modeling of the distribution of thermal fields during spark plasma sintering of alumina ceramics
Authors: Berendeev N N , Popov A A , Pyaterikova V V , Boldin M S , Nokhrin A V , Chuvil’deev V N , Lantsev E A 
Published: June 2019

Abstract
The article shows the use of an experimental-calculation method for the refinement of thermoelectric constants of graphite materials and alumina ceramics by experimentally studying the heating of graphite equipment and refinement thermoelectric constants of materials using the finite element method (ANSYS WORKBENCH). To simulate the thermal fields of graphite equipment based of the data on electric current, voltage and heat exchange conditions, a coupled boundary electric and non-stationary temperature problem was realized. The application of the developed approach made it possible to clarify the thermoelectric constant of materials, which helped to reduce the difference between the experimental and simulated temperatures from 20 to 5%.
Evaluation of tensile strength of nuclear fuel samples
Authors: Goltsev V Y , Osintsev A V 
Published: June 2019

Abstract
For estimation of the strength of the nuclear fuel material as well and for further refinement of nuclear fuel test technology we propose to use small discoid samples, similar in shape to the elements of nuclear fuel in the context of “Brazilian test”. We present here the results of testing small discoid specimens with and without center hole, made of brittle materials, such as cast iron and graphite (both being considered as possible model materials for the nuclear fuel). We compared these materials to nuclear fuel itself (as represented by uranium dioxide). The type of deformation and fracture found in samples made from cast iron suggests that this material cannot be used as a model for the nuclear fuel. In addition, the effect of the specimen size on resistance to destruction was investigated. The results obtained in tests on samples of graphite ARV-1 were in good agreement with the results of tests on uranium dioxide. Using the data obtained in this study, a calculation formula for determining the strength of the nuclear fuel material based on the “Brazilian test” results is proposed.
Advanced methods for consolidation of powder materials by impulse electromagnetic fields
Authors: Grigoryev E G 
Published: June 2019

Abstract
Advanced technologies for the production of new materials and, in particular, nanostructured materials, using powder technologies require fundamentally new approaches for the formation and preservation of a given structural-phase state. Precision control of the state of materials in the process of consolidating powders of nanomaterials can be carried out using pulsed electromagnetic fields. The aim of the project is to study the effect of high-voltage and low-voltage pulsed electromagnetic fields in the technologies of powder consolidation. The experimental devices of spark-plasma sintering, flash-sintering, high-voltage consolidation and magnetic-pulse compaction are used in our laboratory for the production of advanced materials from metal powders, ceramic and composite powders. We can produce boron carbide, silicon carbide, uranium nitride, tungsten carbide - cobalt - diamond composites, tungsten heavy alloys, and others by electromagnetic methods of powder consolidation. Experimental results to consolidation metal powders, ceramic and composites powders by electromagnetic methods presage fruitful results.
Effect of nanosized titanium and silicon carbides on synthesis and consolidation of titanium silicon carbide during spark plasma sintering
Authors: Kulmet’eva V B , Kachenyuk M N , Oglezneva S A , Smetkin A A 
Published: June 2019

Abstract
Using spark plasma sintering method, at temperature T = 1400°C and load of 30 MPa samples of composite material Ti3SiC2/TiC were obtained. Before SPS powder mixtures with molar ratio 3Ti-1.25SiC-0.75C with addition of up to 4% wt of nanopowders of titanium carbide or silicon carbide were mechanically activated in a planetary mill. Material structure was studied using X-ray structural analysis, hardness and fracture toughness was evaluated on basis of Vicker’s indentation results. It was established that introduction of nanocarbides up to 1% wt significantly reduces contents of Ti3SiC2, and further on practically has no influence on phase composition. Increase of isothermal time from 5 to 15 min leads to an increase in the TixSiy secondary phases to 11–14%. Introduction of nano-TiC and nano-SiC into mixtures increases crack fracture toughness to 7.06–7.55 MPa·m1/2 for samples after 5 min of SPS and practically does not change it after 15 min of SPS.
Processing of Al–Zn–Mg–Cu/SiC composite prepared by mechanical alloying
Authors: Kurbatkina E I , Shavnev A A , Grishina O I , Gololobov A V 
Published: June 2019

Abstract
In the present work, using powder metallurgy method, mechanical alloying and extrusion, the metal matrix composite material Al–Zn–Mg–Cu/10% SiC was obtained. Phase transformations occurring during heat treatment were studied. After deformation aluminum solid solution, MgZn2 and SiC are present in the composite material. The X-ray phase analysis and TEM results showed that when the composite material is heated for quenching, the MgZn2 phase is completely dissolved. Study of the aging kinetics showed that the peak of aging of the composite material was achieved in 15 h, which is much faster than in the matrix alloy (24 h). After aging, the solid solution decomposition products appear in the form of a metastable η'- phase (MgZn2), looking like rods located in three mutually perpendicular directions <100> Al.
Combined equipment for synthesis of ultrafine metals and metal compounds powders via Flow-Levitation and crucible methods.
Authors: Kuskov M L , Zhigach A N , Leipunsky I O , Gorbachev A N , Afanasenkova E S , Safronova O A 
Published: June 2019

Abstract
Laboratory automated equipment for synthesis of ultrafine particles of metals, alloys and metal compounds via evaporation-condensation Flow-Levitation Guen-Miller method combined with crucible method using high-frequency (440 kHz) electromagnetic field for heating is described. The equipment synthesizes the said particles and multilayer core-shell structures with mean size ranging from tens to hundreds of nanometers with output from grams to tens of grams per hour. Synthesized particles may be collected into container with inert gas, or into non-volatile liquid, or in situ passivated with air for further handling. Examples of synthesized particles are presented.
Prospective SHS composites for high-temperature applications
Authors: Levashov E A , Kurbatkina V V , Vorotilo S , Pogozhev Yu S , Patsera E I 
Published: June 2019

Abstract
In this article, a succinct review of the SHS ceramics prospective for the high-temperature applications is provided. Macrokinetic features and mechanisms of combustion and structure formation were studied for the systems Ta–Zr–C, Ta–Hf–C, Zr–Ta–B, Hf–Ta–B, Zr–B–Si–C, Ta–Si–C, Mo–Hf–Si–B, and Zr–Ta–B–Si. Materials were produced by the combination of SHS with hot pressing (HP) and spark plasma sintering (SPS), and their structure and properties were investigated.
Experimental studies of the fundamental mechanism for phase formation in reactive solutions toward creation of the functional materials
Authors: Roslyakov S I , Moskovskikh D O , Nepapushev A A , Kuskov K V , Trusov G V , Sedegov A S , Mukasyan A S , Manukyan K V 
Published: June 2019

Abstract
In this work, we examined several modifications of solution combustion synthesis (SCS) method to produce new nanoscale non-oxide phases (nitrides, intermetallics, and alloys). In particularly two approaches were outlined: (i) so-called, catalytic SCS, where existence of one metal promotes reduction during combustion; (ii) synthesis by using media, which contains both reactive solution and solid metals, i.e. combination of solution and heterogeneous combustion.
Effect of Calcination Temperature and Support Type of Pt/WOx/boehmite Catalyst on 1,3-propanediol Production from Hydrogenolysis of Glycerol
Authors: Uttraporn P , Praserthdam P 
Published: June 2019

Abstract
Hydrogenolysis of glycerol to 1,3-PDO was tested over different catalysts. To enhance 1,3-PDO selectivity, our work raised the calcination temperature from 800 °C to 900 °C that promoted Bronsted acidity, glycerol conversion and 1,3-PDO selectivity under the mild reaction condition (140 °C, 0.5 MPa). Glycerol conversion gradually raised from 32.8% to 36.6% and 1,3-PdO selectivity mildly increased from 18.2% to 21.2%. The loading of SiO2 into Pt/WOx/γ-Al2O3 had extremely favourable effects on 1,3-PDO selectivity because the amount of Bronsted acid sites increased significantly as confirmed by NH3-IR.
Role of land quality in corn acreage response to price and policy changes: evidence from the Western Corn Belt
Authors: Uludere Aragon Nazli Z 
Published: June 2019

Abstract
Land quality influences how farmers allocate croplands in response to market forces. Farmers in the Western Corn Belt (WCB) have historically utilized the highest quality lands for corn cultivation, putting lower quality lands to other uses. This paper questions whether high corn prices influenced expansion of corn cultivation on lower quality lands, and the role played by US biofuel policy in such land use change. Using three decades of data, I estimate that the proportional change in corn acreage to rising corn prices is nearly three times larger in counties with lowest land quality versus those with the highest land quality. This variable response, however, is driven by the changes in cropland use for corn cultivation after 2006, the period following the change in US biofuel policy, and punctuated by two crop price spikes. Marginal agricultural lands and other lower quality lands, such as grasslands used for range or pasture, are therefore prone to conversion into corn cropping disproportionately during high price periods. High price responsiveness of lower quality lands also suggests these lands may cycle in and out of corn cropping opportunistically. This has implications for marginal land availability for bioenergy crops, and poses environmental concerns to the extent lower quality lands are also more environmentally sensitive.
Can the weakening of Indian Monsoon be attributed to anthropogenic aerosols?
Authors: Saha Anamitra , Ghosh Subimal 
Published: June 2019

Abstract
Literature found that the increasing concentration of Anthropogenic Aerosol (AA) is the key reason behind the weakening trend of Indian Summer Monsoon Rainfall (ISMR), based on the Coupled Model Intercomparison Project Phase5 (CMIP5) simulations with AA-only forcing. Here, we re-examine and find that AA-only simulations show country-wide drying, in contrast to the observed east-west asymmetry in the recent ISMR trend. For further evaluation, we decompose the changes in moisture convergence during summer monsoon into dynamic and thermodynamic components. We find that multi-run ensemble averages for individual CMIP5 models do not capture the observed dominance of the changes in dynamic component over the thermodynamic one. An optimal fingerprinting technique for detection and attribution also fail to attribute the changes in ISMR to AA, either because of large internal variability and/or intermodel spread. This implies the need for more careful assessment of AA-only simulations for the ISMR before attributing the changes to AA.
Consumer Preferences for Country‐of‐Origin Labeling in Protected Markets: Evidence from the Canadian Dairy Market
Authors: Norris Amanda , Cranfield John 
Published: June 2019

AbstractRecent trade agreements will expand Canada's market access commitments for dairy products. We explore whether Canadian consumers will respond to the increased presence of imported dairy products using a discrete choice experiment that accounts for price, country‐of‐origin (COO), production method, brand, and traceability. We use four processed dairy products to illustrate potential trade‐offs: Gouda and cheddar cheese, ice cream, and yogurt. There are statistically significant discounts associated with COO effects. These discounts vary with the dairy product and are large compared to consumer valuation of other included attributes. We find large premiums for traceability programs, suggesting that the absence of assurances related to traceability may mute actual market penetration arising from increased access to the Canadian dairy market.
How to Teach Laboratory Stewardship in the Undergraduate Medical Curriculum?
Authors: Roth Christine G , Huang William Y , Caruso Andrew C , Sekhon Navdeep , Kung Doris H , Greely Jocelyn T , Du Ye B , Holder-Haynes Juliet G , Little Jenelle E , Fielder Elaine K , Ismail Nadia J 
Published: June 2019

AbstractObjectivesPromotion of high-quality care at a lower cost requires educational initiatives across the continuum of medical education. A needs assessment was performed to inform the design of an educational tool with the goal of teaching laboratory stewardship to medical students.MethodsThe needs assessment consisted of semistructured interviews with core clerkship directors and residency program directors at our institution, a national survey to the Undergraduate Medical Educators Section (UMEDS) of the Association of Pathology Chairs, and a review of existing online resources that teach high-value care.ResultsTwo major themes emerged regarding opportunities to enhance laboratory stewardship education: appropriate ordering (knowledge of test indications, pretest/posttest probability, appropriateness criteria, recognition of unnecessary testing) and correct interpretation (understanding test specifications, factors that affect the test result, recognizing inaccurate results).ConclusionsThe online educational tool will focus on the curricular needs identified, using a multidisciplinary approach for development and implementation.
Peripheral T-Cell Lymphoma Arising in Patients With Chronic Lymphocytic Leukemia
Authors: Van Der Nest Bianca M , Leslie Connull , Joske David , Radeski Dejan , White Rohen , Cheah Chan Yoon 
Published: June 2019

Abstract

Objectives
To describe three further cases of anaplastic large cell lymphoma (ALCL) occurring in patients with preexisting chronic lymphocytic leukemia (CLL). We also reviewed the literature of previously published cases.

Methods
We discuss the clinical features, histopathology, and outcomes for three patients with ALCL and CLL from Perth, Australia. The cases were also included in a literature review of existing cases and comparisons were made with our cohort.

Results
The three patients included two men (aged 77 and 74 years) and one woman (aged 66 years). All had a history of untreated CLL with diagnosis established 4 to 16 years before. They had lymphadenopathy and/or cutaneous/soft tissue lesions that proved to be ALCL, ALK+ (one case) or ALCL, ALK– (two cases).

Conclusions
Further research is required in this area to establish prognostic and management recommendations. Increasing numbers of cases are being described. Positron emission tomography with computed tomography was not useful in our cohort for diagnosing progression.
Comprehensive study of the exposome and omic data using rexposome Bioconductor Packages
Authors: Hernandez-Ferrer Carles , Wellenius Gregory A , Tamayo Ibon , Basagaña Xavier , Sunyer Jordi , Vrijheid Martine , Gonzalez Juan R 
Published: June 2019

Abstract

Summary
Genomics has dramatically improved our understanding of the molecular origins of certain human diseases. Nonetheless, our health is also influenced by the cumulative impact of exposures experienced across the life course (termed ‘exposome’). The study of the high-dimensional exposome offers a new paradigm for investigating environmental contributions to disease etiology. However, there is a lack of bioinformatics tools for managing, visualizing and analyzing the exposome. The analysis data should include both association with health outcomes and integration with omic layers. We provide a generic framework called rexposome project, developed in the R/Bioconductor architecture that includes object-oriented classes and methods to leverage high-dimensional exposome data in disease association studies including its integration with a variety of high-throughput data types. The usefulness of the package is illustrated by analyzing a real dataset including exposome data, three health outcomes related to respiratory diseases and its integration with the transcriptome and methylome.

Availability and implementation
rexposome project is available at https://isglobal-brge.github.io/rexposome/.

Supplementary information
Supplementary data are available at Bioinformatics online.
Nematodes as evolutionary commuters between marine, freshwater and terrestrial habitats
Authors: Holterman Martijn , Schratzberger Michaela , Helder Johannes 
Published: June 2019

Abstract
Nematodes are the only major metazoan group which is persistently abundant and diverse across marine, freshwater and terrestrial ecosystems. This could be the result of a few major habitat transitions followed by extensive diversification, or numerous habitat transitions followed by moderate diversification. To pinpoint habitat transitions, we superposed nematode habitat associations on an available phylum-wide phylogenetic tree based on small subunit ribosomal DNA sequences (≈2730 SSU rDNA sequences covering ≈1750 nematode taxa). Our analysis revealed at least 30 major habitat transitions within the phylum Nematoda. These transitions as well as their directionality were unevenly spread over the 12 major clades. Most transitions reside in Clades 1–6, and these transitions are bidirectional. Members of Clades 8–12 showed five full transitions, and these took place exclusively from terrestrial to marine systems. We relate our results to the distinct secretory–excretory systems in Clades 1–6 and Clades 8–12, as well as to differences in water permeability of the nematode cuticle. Hence, the phylum Nematoda is characterized by a relatively large number of habitat transitions followed by moderate diversification. The identification of multiple habitat transitions at a low taxonomic level will facilitate future investigations into the mechanisms underlying this unusual ecological flexibility.
On nonparametric maximum likelihood estimation with double truncation
Authors: Xiao J , Hudgens M G 
Published: June 2019

SummaryDoubly truncated survival data arise if failure times are observed only within certain time intervals. The nonparametric maximum likelihood estimator is widely used to estimate the underlying failure time distribution. Using a directed graph representation of the data suggested by Vardi (1985), a certain graphical condition holds if and only if the nonparametric maximum likelihood estimate exists and is unique. If this condition does not hold, then such an estimate may exist but need not be unique, so another graphical condition is proposed to check whether such an estimate exists. The conditions are simple to check using existing graphical software. Reanalysis of an AIDS incubation time dataset shows that a nonparametric maximum likelihood estimate does not exist for these data.