bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects of various Cu(0), Fe(0), and proanthocyanidin reducing agents on Fe(iii)-catalysed ATRP for the synthesis of PMMA block copolymers and their self-assembly behaviours
Authors: Huang Yi-Shen , Hsueh Han-Yu , Aimi Junko , Chou Li-Chieh , Lu Yu-Chi , Kuo Shiao-Wei , Wang Chung-Chi , Chen Kuo-Yu , Huang Chih-Feng
Published: June 2020

Well-defined PMMA, PMMA-b-PBzMA and PMMA-b-PBMA polymers were obtained via green Fe-ATRP with the aid of proanthocyanidins. Interestingly, microphase separation was observed in PMMA-b-PBMA polymer with upper critical ordering temperature behaviour.
Remarkably improved oxygen evolution reaction activity of cobalt oxides by an Fe ion solution immersion process
Authors: Pan Shencheng , Mao Xin , Yu Juan , Hao Lin , Du Aijun , Li Bing
Published: June 2020

Fe ion-treated cobalt oxides were synthesized for the oxygen evolution reaction. Both theory and experiment confirm that the catalytic activity of cobalt oxides was significantly enhanced by Fe ions.
Synthesis, crystal structures, and luminescent properties of Zn(ii), Cd(ii), Eu(iii) complexes and detection of Fe(iii) ions based on a diacylhydrazone Schiff base
Authors: Han Aiying , Su Hao , Xu Guohong , Khan Maroof Ahmad , Li Hui
Published: June 2020

Acylhydrazone Schiff bases are rich in N and O atoms to coordinate with metal ions to form multidentate complexes.
Synthesis and characterization of a supported Pd complex on volcanic pumice laminates textured by cellulose for facilitating Suzuki–Miyaura cross-coupling reactions
Authors: Soltani Siavash Salek , Taheri-Ledari Reza , Farnia S. Morteza F. , Maleki Ali , Foroumadi Alireza
Published: June 2020

An efficient natural-based catalyst constructed of volcanic pumice, cellulose polymeric chains, and palladium nanoparticles is presented for Suzuki–Miyaura coupling reaction.
Structure and solvation of confined water and water–ethanol clusters within microporous Brønsted acids and their effects on ethanol dehydration catalysis
Authors: Bates Jason S. , Bukowski Brandon C. , Greeley Jeffrey , Gounder Rajamani
Published: June 2020

Water networks confined within zeolites solvate clustered reactive intermediates and must rearrange to accommodate transition states that differ in size and polarity, with thermodynamic penalties that depend on the shape of the confining environment.
Correction: Transforming colloidal Cs4PbBr6 nanocrystals with poly(maleic anhydride-alt-1-octadecene) into stable CsPbBr3 perovskite emitters through intermediate heterostructures
Authors: Baranov Dmitry , Caputo Gianvito , Goldoni Luca , Dang Zhiya , Scarfiello Riccardo , De Trizio Luca , Portone Alberto , Fabbri Filippo , Camposeo Andrea , Pisignano Dario , Manna Liberato
Published: June 2020

Correction for ‘Transforming colloidal Cs4PbBr6 nanocrystals with poly(maleic anhydride-alt-1-octadecene) into stable CsPbBr3 perovskite emitters through intermediate heterostructures’ by Dmitry Baranov et al., Chem. Sci., 2020, 11, 3986–3995, DOI: 10.1039/D0SC00738B.
A comparative study of undoped, boron-doped, and boron/fluorine dual-doped carbon nanoparticles obtained via solution plasma as catalysts for the oxygen reduction reaction
Authors: Chokradjaroen Chayanaphat , Kato Shuhei , Fujiwara Kensuke , Watanabe Hiroko , Ishii Takahiro , Ishizaki Takahiro
Published: June 2020

Solution plasma synthesis of boron/fluorine dual-doped carbon electrocatalysts for the oxygen reduction reaction.
Structural transformations in tetravalent nematic shells induced by a magnetic field
Authors: Ishii Yoko , Zhou Ye , He Kunyun , Takanishi Yoichi , Yamamoto Jun , de Pablo Juan , Lopez-Leon Teresa
Published: June 2020

We study the structural transformations undergone by tetravalent nematic liquid crystal shells under a strong uniform magnetic field, using both experiments and simulations.
Phase behaviour and structure of a model biomolecular condensate
Authors: Shillcock J. C. , Brochut M. , Chénais E. , Ipsen J. H.
Published: June 2020

Associative polymers phase separate into a porous phase that mimics the structural features of biomolecular condensates of intrinsically-disordered proteins.
Inert basal plane activation of two-dimensional ZnIn2S4via Ni atom doping for enhanced co-catalyst free photocatalytic hydrogen evolution
Authors: Shi Xiaowei , Mao Liang , Dai Chao , Yang Ping , Zhang Junying , Dong Fuyuan , Zheng Lingxia , Fujitsuka Mamoru , Zheng Huajun
Published: June 2020

Doping Ni atoms can trigger the HER activity of inert S atoms on the 2D ZnIn2S4 surface and prolong the electron lifetime.
Model for the electro-mechanical behavior of elastic organic transistors
Authors: Reynolds Veronica G. , Oh Saejin , Xie Renxuan , Chabinyc Michael L.
Published: June 2020

A model is presented to predict the electro-mechanical behavior of organic thin film transistors and organic electrochemical transistors as well as a stability criteria for stretchable complementary inverters.
Customization of Sn2P2S6 ferroelectrics by post-growth solid-state diffusion doping
Authors: Shvalya Vasyl , Zavašnik Janez , Nasretdinova Venera , Uršič Hana , Kovač Janez , Grabar Alexander , Kohutych Anton , Molnar Alexander , Evans Dean R. , Mihailović Dragan D. , Cvelbar Uroš
Published: June 2020

For the first time, we demonstrated successful post-synthesis incorporation of metal dopants at elevated temperature into a host structure of Sn2P2S6, known as the grandfather of dichalcogenide ferroelectrics with a formula M2P2X6 (M = metal and X = chalcogen).
Flavonoids in adipose tissue inflammation and atherosclerosis: one arrow, two targets
Authors: Fardoun Manal Muin , Maaliki Dina , Halabi Nabil , Iratni Rabah , Bitto Alessandra , Baydoun Elias , Eid Ali H.
Published: June 2020

Flavonoids are polyphenolic compounds naturally occurring in fruits and vegetables, in addition to beverages such as tea and coffee. Flavonoids are emerging as potent therapeutic agents for cardiovascular as well as metabolic diseases. Several studies corroborated an inverse relationship between flavonoid consumption and cardiovascular disease (CVD) or adipose tissue inflammation (ATI). Flavonoids exert their anti-atherogenic effects by increasing nitric oxide (NO), reducing reactive oxygen species (ROS), and decreasing pro-inflammatory cytokines. In addition, flavonoids alleviate ATI by decreasing triglyceride and cholesterol levels, as well as by attenuating inflammatory mediators. Furthermore, flavonoids inhibit synthesis of fatty acids and promote their oxidation. In this review, we discuss the effect of the main classes of flavonoids, namely flavones, flavonols, flavanols, flavanones, anthocyanins, and isoflavones, on atherosclerosis and ATI. In addition, we dissect the underlying molecular and cellular mechanisms of action for these flavonoids. We conclude by supporting the potential benefit for flavonoids in the management or treatment of CVD; yet, we call for more robust clinical studies for safety and pharmacokinetic values.
Impaired insulin exocytosis in chronic hepatitis C infection: contributory role of p38δ MAPK–protein kinase D–golgi complex axis
Authors: Narne Parimala
Published: June 2020

Hepatitis C virus (HCV) infection and chronic hepatitis C (CHC) are associated with a measurable risk of insulin resistance (IR)/impaired glucose tolerance (IGT)/diabetes mellitus (DM). While loss of hepatic endocrine function contributes to liver cirrhosis in diabetic patients, onset and progression of IR/IGT to diabetes and exacerbation of incident hyperglycemia are ostensibly linked with chronic HCV infection. In this regard, the study by Chen J et al. appearing in Clinical Science (2020) (134(5) https://doi.org/10.1042/CS20190900) attempts to understand the mechanisms underlying the savaging effects of chronic HCV infection on insulin-producing pancreatic β-cells and hence diabetic onset. The study investigated the role of mitogen-activated protein kinase (MAPK) p38δ–protein kinase D (PKD)–golgi complex axis in impacting insulin exocytosis. It was inferred that an insulin secretory defect of pancreatic β-cells, owing to disrupted insulin exocytosis, to an extent explains β-cell dysfunction in HCV-infected or CHC milieu. HCV infection negatively regulates first-phase and second-phase insulin secretion by impinging on PKD-dependent insulin secretory granule fission at trans-golgi network and insulin secretory vesicle membrane fusion events. This commentary highlights the study in question, that deciphered the contribution of p38δ MAPK–PKD–golgi complex axis to β-cell dysfunction in CHC milieu. This pivotal axis proffers a formidable therapeutic opportunity for alleviation of double burden of glucose abnormalities/DM and CHC.
Quantitative and Qualitative Analysis of Verb Fluency Performance in Individuals With Probable Alzheimer's Disease and Healthy Older Adults
Authors: Paek Eun Jin , Murray Laura L.
Published: June 2020

Purpose

To date, verb fluency tasks have been mainly analyzed quantitatively for individuals with dementia. Qualitative analysis, however, such as examining the semantic and psycholinguistic content of the responses might further inform researchers and clinicians about patients' cognitive and linguistic status. Therefore, the current study examined psycholinguistic and lexical characteristics of verb fluency responses in individuals with probable Alzheimer's disease (pAD) and healthy older adults to delineate qualitative and quantitative differences between the two groups.

Method

The verb fluency responses from participants with pAD (amnestic type) were compared to those from age- and education-matched healthy older adults. The responses were analyzed with respect to the number and proportion of correct responses, word frequency, age of acquisition, phoneme and syllable length, and neighborhood density. The verb responses were also categorized into mental state verbs and action verbs. Additionally, a battery of cognitive–linguistic tests was administered, and for each group, relationships between correct verb fluency responses and other cognitive–linguistic skills were investigated using correlation and regression analyses.

Results

Similar to previous findings regarding noun retrieval in dementia, the results revealed that individuals with pAD not only produced fewer correct verb fluency responses but also generated little to no mental state verbs compared to the control group. The group with pAD also produced verbs with shorter phoneme and syllable lengths, higher word frequency, and earlier age of acquisition ratings relative to the healthy older adults. The number of correct verb fluency responses was mainly predicted by a reading comprehension score in the pAD group and a nonverbal fluency test score in the healthy group.

Conclusion

The current quantitative and qualitative findings add support to the contention that lexical–semantic impairments underlie word retrieval problems in pAD and such difficulties present in generative naming paradigms and also across grammatical categories.
Quality, Readability, and Suitability of Hearing Health-Related Materials: A Descriptive Review
Authors: Manchaiah Vinaya , Kelly-Campbell Rebecca J. , Bellon-Harn Monica L. , Beukes Eldré W.
Published: June 2020

Objectives

The objective of this descriptive review was to determine the quality, readability, and suitability of ear and hearing health information and materials for patients and their significant others.

Method

A literature search was conducted between August 2018 and April 2019 in the databases CINAHL Complete, MEDLINE, and PsychInfo. Inclusion and exclusion criteria were used to shortlist studies. Data regarding quality, suitability, and readability were extracted from the included studies. Data were assessed qualitatively.

Results

There were 34 studies included in this review. Of those, eight examined quality, 33 assessed readability, and four investigated the suitability of materials. The range of materials assessed included diagnostic reports, patient education materials (PEMs), patient-reported outcome measures, and websites. Quality elements were examined in studies focusing on website information. Findings indicated that most websites were of poor quality. Suitability was examined in studies focusing on PEMs such as hearing aid user guides. Findings indicated that most of the existing materials were not suitable for the intended populations. The reading grade level of information across all four categories was found to be higher than the recommended fifth or sixth reading grade level for health-related materials. Revisions of some diagnostic reports and PEMs showed that improvements are possible.

Conclusions

This review suggests that ear- and hearing-related materials generally have lower quality and suitability with higher readability (more difficult to read). Development of materials that are suitable, of high quality, and at the appropriate readability levels is required to improve accessibility of ear- and hearing-related materials.
Patterns of Conversation Trouble Source and Repair as Indices of Improved Conversation in Aphasia: A Multiple-Case Study Using Conversation Analysis
Authors: Tetnowski Jennifer Thompson , Tetnowski John A. , Damico Jack S.
Published: June 2020

Purpose

Social approaches to intervention for aphasia are being increasingly employed to address the functional communication barriers experienced by persons with aphasia. One specific approach is the use of conversation-based treatment in both group and two-person dyads. Although there are several methods to measure improvement for stimulation and cognitive neurolinguistic approaches, researchers have consistently indicated a need for outcome measures that can objectively demonstrate improved communication following conversation treatment. This study aims to demonstrate the utility for examining the patterns of conversation trouble source and repair as indices for improved communication as a positive response to intervention.

Method

The conversations of 20 consecutive participants, before and after 3 months, or 40 hr, of group and individual conversation-based treatment, were transcribed using conventions of conversation analysis, and sociolinguistic discourse analysis was applied. Measures of trouble source and repair were aggregated and subjected to statistical analysis.

Results

Persons with aphasia demonstrated statistically significant improvement in patterns of conversation trouble source and repair posttreatment for the rate of conversation trouble source and the length of repair. However, measures of self-initiation and self-completion of repair did not reach significance.

Conclusion

The study indicates that, following conversation-based treatment, the conversations of persons with aphasias were more efficient, experiencing fewer trouble sources and shorter repair sequences. These findings suggest that measures of conversation for the rate of trouble source and length of the repair sequence are valid indices of improved conversation.
Constraining the masses of high-redshift clusters with weak lensing: Revised shape calibration testing for the impact of stronger shears and increased blending
Authors: Hernández-Martín B. , Schrabback T. , Hoekstra H. , Martinet N. , Hlavacek-Larrondo J. , Bleem L. E. , Gladders M. D. , Stalder B. , Stark A. A. , Bayliss M.
Published: June 2020

Weak lensing measurements suffer from well-known shear estimation biases, which can be partially corrected for with the use of image simulations. In this work we present an analysis of simulated images that mimic Hubble Space Telescope/Advance Camera for Surveys observations of high-redshift galaxy clusters, including cluster specific issues such as non-weak shear and increased blending. Our synthetic galaxies have been generated to have similar observed properties as the background-selected source samples studied in the real images. First, we used simulations with galaxies placed on a grid to determine a revised signal-to-noise-dependent (S/NKSB) correction for multiplicative shear measurement bias, and to quantify the sensitivity of our KSB+ bias calibration to mismatches of galaxy or PSF properties between the real data and the simulations. Next, we studied the impact of increased blending and light contamination from cluster and foreground galaxies, finding it to be negligible for high-redshift (z >  0.7) clusters, whereas shear measurements can be affected at the ∼1% level for lower redshift clusters given their brighter member galaxies. Finally, we studied the impact of fainter neighbours and selection bias using a set of simulated images that mimic the positions and magnitudes of galaxies in Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey (CANDELS) data, thereby including realistic clustering. While the initial SExtractor object detection causes a multiplicative shear selection bias of −0.028 ± 0.002, this is reduced to −0.016 ± 0.002 by further cuts applied in our pipeline. Given the limited depth of the CANDELS data, we compared our CANDELS-based estimate for the impact of faint neighbours on the multiplicative shear measurement bias to a grid-based analysis, to which we added clustered galaxies to even fainter magnitudes based on Hubble Ultra Deep Field data, yielding a refined estimate of ∼ − 0.013. Our sensitivity analysis suggests that our pipeline is calibrated to an accuracy of ∼0.015 once all corrections are applied, which is fully sufficient for current and near-future weak lensing studies of high-redshift clusters. As an application, we used it for a refined analysis of three highly relaxed clusters from the South Pole Telescope Sunyaev-Zeldovich survey, where we now included measurements down to the cluster core (r >  200 kpc) as enabled by our work. Compared to previously employed scales (r >  500 kpc), this tightens the cluster mass constraints by a factor 1.38 on average.
Revised GLE database: Fluences of solar energetic particles as measured by the neutron-monitor network since 1956
Authors: Usoskin I. , Koldobskiy S. , Kovaltsov G. A. , Gil A. , Usoskina I. , Willamo T. , Ibragimov A.
Published: June 2020

Aims.Continuous measurements of ground-based neutron monitors (NMs) form the main data source for studying high-energy high-intensity solar energetic particle (SEP) events that are called ground-level enhancements (GLEs). All available data are collected in the International GLE Database (IGLED), which provides formal NM count-rate increases above the constant pre-increase level which is due to galactic cosmic rays (GCR). This data set is used to reconstruct the energy spectra of GLE events. However, the assumption of a constant GCR background level throughout GLE events is often invalid. Here we thoroughly revise the IGLED and provide a data set of detrended NM count-rate increases that accounts for the variable GCR background.

Methods.The formal GLE count-rate increases were corrected for the variable GCR background, which may vary significantly during GLE events. The corresponding integral omnidirectional fluences of SEPs were reconstructed for all GLEs with sufficient strength from the detrended data using the effective rigidity method.

Results.The database of the detrended NM count rate is revised for GLE events since 1956. Integral omnidirectional fluences were estimated for 58 GLE events and parametrised for 52 sufficiently strong events using the modified Ellison-Ramaty spectral shape.

Conclusions.The IGLED was revised to account for the variable GCR background. Integral omnidirectional fluences reconstructed for most of GLE events were added to IGLED. This forms the basis for more precise studies of parameters of SEP events and thus for solar and space physics.
Features of new sites designing on quarry fields of the existing open pit mines of Kuzbass
Authors: Plotnikov Eugene , Kolesnikov Valery , Šimková Zuzana , Demirel Nuray
Published: June 2020

At a number of large open pit mines in Kuzbass, coal production costs have increased due to the deepening of mining operations. In order to reduce them, separate sections of coal mining at the upper horizons are operating or are being designed for mining at low current stripping ratio. For the same purpose, open-pit mining areas at the fields of existing quarries are operated and designed. Examples of such existing and projected areas are: the “Complex Synclinal” area at the Krasnobrodsky surface mine; the “Prirezka” area at the Chernigovsky surface mine; a number open-pit areas at the underground mines; etc. The main factors complicating the involvement in the development of new sites are: the presence of residential areas, industrial buildings and structures near the boundaries of the mining area; power supply lines, transport communications, which limits or excludes the production of mass explosions in the preparation of overburden for excavation; limited size or lack of areas for external dumps at a short distance from the site (in some cases, it is possible to close the mined-out space of the worked-out quarry field). When designing the development of areas characterized by such conditions, it is necessary to consider the application of new technical and technological solutions.
Existing methods of dehydration of sapropel
Authors: Utenkova Tatiana , Kremcheev Eldar , Korotkova Olga
Published: June 2020

The Russian Federation has large reserves of lake sapropel. In Russia, there are about 50 thousand deposits of sapropel of natural humidity. Sapropel is used in various fields: medicine, construction, animal husbandry and agriculture. So, extracting sapropel, we get not only environmentally friendly raw materials, but also clean lakes that are sources of fresh water and recreational activity. In order to use sapropel, it is necessary to lower its moisture. Difficulties associated with dehydration of sapropel arise due to the high natural humidity of sapropel, which reaches 98 %, as well as due to the fact that sapropel has a fine colloidal structure. This article presents the analysis of existing methods and engineering solutions for sapropel dewatering.
Influence of Organosilicon Additives on Strength of Sod Peat
Authors: Belyakov Vladimir , Kuporova Alexsandra
Published: June 2020

The results of experiments to study the drying process of crumble peat with water-soluble organosilicon additives are presented. The analysis has found that a hydrophobic agent can be used to reduce the initial water content in moulding and, thus, to reduce energy consumption and improve the production performance. Subject to the optimal concentrations of additives, a significant increase in strength at the same drying intensity can be achieved which improves the quality of the finished product.
The Use of Peat Deposits of the Russian Federation for Organic Fertilizers Production
Authors: Misnikov Oleg
Published: June 2020

In agricultural production, soil fertility and the overall productivity of arable land depends on the quality and quantity of mineral and organic fertilizers. The decrease in the humus content in soil observed over the past decade requires a systematic use of various organic fertilizers. The use of peat-based fertilizers guarantees high and sustainable crop yields. Restoration of soil fertility should be carried out by organic fertilizers enriched with humic acids with physiologically active groups, free nitrogen-containing components, a complex of nutrients and micro elements. The author considers the possibility of using humus peat ameliorants for the restoration of disturbed lands and the increase of soil fertility. The production and use of peat-based organic fertilizers and ameliorants in various sectors of the economy is an incentive for the stable functioning of the peat business and a significant factor in the socio- economic development of the regions of the Russian Federation.
Influence of the nature of the outflow of explosion products from blast holes and boreholes on the efficiency of rock destruction
Authors: Yastrebova Karina , Moldovan Dmitriy , Chernobay Vladimir
Published: June 2020

The problem of the quality of rock preparation before blasting for the further processing has been considered. The data that can solve the problem of keeping explosion products in the charging chamber, increasing productivity of mining companies have been presented. Based on field tests and further processing of the obtained data, conclusions on solving the relevant problem have been made.
Current State and Development Prospects of Autonomous Haulage at Surface Mines
Authors: Voronov Yuri , Voronov Artyom , Makhambayev Daulet
Published: June 2020

Autonomous (or unmanned) haulage systems have been used in surface mining for more than 10 years. Most of the equipment at such mines is remotely controlled by electronics, for which they are sometimes called “smart mines”. The elimination of the “human factor” from the pro- duction process should theoretically increase its safety and productivity, as well as reduce the operating costs of its implementation. However, despite the obvious advantages of this technology, it is not spreading as fast as ex- pected. This suggests that there are a number of problems that limit its de- velopment. In this paper, a review and analysis of the experience in the in- dustrial implementation of autonomous haulage in surface mining is car- ried out in order to identify existing problems and possible directions for their further development. The prerequisites, a brief history and some im- portant results of the introduction of autonomous haulage systems in sur- face mining, their main types and constituent elements are outlined, as well as the existing problems and expected directions of their development are highlighted.
Comparative Analysis of Aerial Photography with Instrumental Survey
Authors: Kuznetsov Evgeniy , Koretskaia Galina , Abay Asmelash
Published: June 2020

At present, in Kuzbass, various methods of automation of plane surveys in open mining are used. In most cases, the choice of method depends on the material base of the enterprise and the professionalism of the performers. Typically, the work on the surveying automation consists in using electronic tachometers, which reduce time and simplify field and office work. However, the use of electronic tachometers remains the human factor and does not allow solving the problem of displaying the situation throughout the open pit at one physical moment of time. Aerial photography (AP) significantly increases the performance of plane surveys and makes it possible to most fully and reliably display the information about the surface and ensure the safety of fieldwork. The article presents a comparative analysis of the accuracy of constructing a digital terrain model obtained during aerial photography by AN-2 aircraft and instrumental survey performed with electronic tachometer Leica TS 06 plus, by example of surveying a trench of section № 1 at Olzherassky open pit in the Kemerovo region. The advantages and disadvantages of AP from an airplane and prospects of using AP from an unmanned aerial vehicle (UAV) are given.
Method of Expanding Measurement Limits of Digital Dynamometer in Testing Strength of Moulded Peat Products
Authors: Yablonev Alexander , Guseva Anna
Published: June 2020

The work is carried out to survey operating quality of sod peat produced by milling-forming machines in the field. The surveillance will help make necessary changes in mining machine designs and operating modes in a timely manner. One of the most important quality parameters of sod peat is its bending strength. To evaluate it, Tver State Technical University has developed a destruction test bench. The test bench is equipped with a digital dynamometer and a strain-gauge bracket torecord the destructive load. However, the instruments are designed for 1 kN maximum load. The bending tests of moulded peat products conducted by the authors showed that the destructive load often exceeds 1 kN, which meant that the generation and measurement limits of destructive load have to be expanded within the range of equipment being available. The problem has been solved by installing additional elements in the strain- gauge bracket and making a calibration chart. The method can expand the generation and measurement limits of destructive load by more than 50 %.
Solutions for Digitalization of the Coal Industry Implemented in UC Kuzbassrazrezugol
Authors: Semenov Yuri , Semenova Olga , Kuvataev Ildar
Published: June 2020

According to the article, digitalization and optimization of the coal industry are to continue within the framework of the National Technology Initiative (NTI), the Strategy for Scientific and Technological Development of the Russian Federation, and the Digital Economy Programme. At the initial stage of modernization, the suggested mathematical and software tools will allow creating a smart digital twin of the supply chain. This digital twin will simplify obtaining comprehensive data about the interaction of the focal coal mining enterprises and contractors, carrying out simulation experiments based on various input data, and analyzing the impact of inventory management and transport policies on the system performance. The digital model will enable the coal companies management to find reserves for optimization and transformation of all links in the added-value chain.
Design a Reasonable Width of Coal Pillar Using a Numerical Model. A case study of Khe Cham basin, Vietnam
Authors: Le Quang Phuc , Zubov Vladimir , Duc Thang Pham
Published: June 2020

Problems in surrounding rock displacement, roadway deformation and complex support are the hallmarks of the long wall mining system. Such problems seriously affect the safety and efficient production of coal mines. To control the deformation of the rocks around the roadway next to the goaf, to reduce the support pressure, in Vietnamese underground mines often leave supporting coal pillars. Identification of a reasonable design for roadway supporting pillars by a numerical simulation study was conducted under the geological and technical foundation of I-10- 2 working faces at the Khe Cham coal mine, Vietnam . The characteristics of stress and pressure distribution of roof layers on coal pillars are modeled under different pillar widths. The results show a great linear increase of the vertical stress on the narrow coal pillar and as the width of the coal pillar increases, the area of the elastic core area also increases and the level of stress increase tends to be stable without any apparent uptrend. Coal pillar deformation decreases with increasing coal pillar width, but it leads to large coal loss and waste of resources. Therefore, with the current supporting solutions to increase the stability of the coal pillar, the size range of a coal pillar is determined to be 6-8 m through numerical simulation. The conclusions obtained may provide a certain reference number to choose the logical location of the furnace lines under similar geological conditions.
Study of the Processes of Electroosmotic Cleaning of Soils from Oil Pollution on a Three-dimensional Physical Model
Authors: Shabanov Evgeniy
Published: June 2020

The methods and results of laboratory modeling of processes in clay soils contaminated with oily substances are reviewed: on samples, on one-dimensional and three-dimensional physical models. Laboratory facili- ties, the procedure for conducting experiments and processing their results are described. The possibility of a point and integral forecast of the degree of soil contamination by the results of measurements of its electrical re- sistance is confirmed. The dynamics of changes in porosity, humidity, and particle size distribution of oil-contaminated soils during electric treatment as a result of thermal and osmotic effects by comparing direct measure- ment data and electrophysical monitoring using a system of micro-sensors was revealed. A comparison of the results of the electric treatment of clean soil, contaminated with liquid and viscous oil products is given.
Disturbed Lands Reclamation Statement in the Territory of the Mokhovsky Coal Mine
Authors: Stenina Natalia , Ivina Oksana , Yakovchenko Marina , Lebedev Gennady
Published: June 2020

The national project “Ecology” sets to bring up to date the ecological policy of the environment-geared laws of the Russian Federation which must preserve biodiversity and afford the involvement of all participants in the process. Revegetation, as part of the program, sets to restore disturbed lands to a condition suitable for their use in the national economy and prevent their anthropogenic impact on the adjacent areas. The quality of reclamation works is not always at an adequate level, which creates difficulties in the remediated lands development. This is a consequence of insufficient information at the design stage, specifically data on the composition and properties of the soil cover and worked-out rock mass, lack of special technical support for the implementation of remediation measures at the proper level, the landscape of the deposit is not taken into account during the work with disturbed soils. Intensive use of the studied territories of the Sartakinsky, Karakansky and Mokhovsky fields both in agricultural and mining industries led to changes in the natural biocenos. This paper presents the study of soil-agrochemical characteristics (granulometric and structural structure of soil, the humus content, hydrogen index, the content of food elements, hydrolytic acidity, the sum of absorbed bases, absorption capacity, etc.) on different genetic horizons of zonal soils of Mokhovsky coal mine, and specifically unbroken soils of Mokhovsky, Sartakinsky and Karakansky fields on possibility of their use at carrying out of biological reclamation.
Innovative Ecosystem of Mining Industry
Authors: Kalenov Oleg , Kukushkin Sergey
Published: June 2020

The mining industry belongs to the leading sectors of the global economy. However, the technologies used in it can not always be called innovative. This is due to both the specifics of the industry and the general technological lag of Russian economy. At present, it is almost impossible for individual enterprises to achieve significant success apart. In order for the process of innovative technological development to proceed more intensively, it is necessary to consider it through the prism of the ecosystem, i.e. a set of participants and the corresponding environment of this process, allowing to achieve a synergistic effect. The concept of an innovative ecosystem is based on the triple helix model, which is in turn based on a partnership between the state, science and business. They can interact effectively on the basis of technopark structures, which are a key element of the modern innovation ecosystem. The study was conducted on the basis of the Kemerovo region – a region in which a significant part of the Russian mining industry is concentrated. One of the tools for implementing the ecosystem approach to managing the development of the mining industry should be the main element of the innovation infrastructure of the Kemerovo region – the Kuzbass Technopark.
General Guidelines for Environmental and Technological Expertise of the Best Available Technologies Implementation at Large Industrial Enterprises in Russia
Authors: Zakondyrin Alexander
Published: June 2020

In 2019, the National Ecology Project was launched in Russia, which is aimed at the efficient management of production and consumption waste, including the elimination of all unauthorized landfills identified on January 1, 2018 within the boundaries of cities, dramatic decrease in atmospheric air pollution in large industrial centers, including a reduction of at least 20 percent of the total volume of pollutant emissions into the air in the most polluted cities, improving the quality of drinking water for the population, especially residents of settlements. As the main task in the implementation of the Clean Air federal project, it is planned to implement comprehensive action plans to reduce emissions of pollutants into the air in large industrial centers, taking into account summary calculations of the negative environmental impacts allowed in these cities.
Analysis of Devices to Detect Longitudinal Tear on Conveyor Belts
Authors: Zakharov Alexander , Geike Boris , Grigoryev Alexander , Zakharova Alla
Published: June 2020

Currently mining enterprises more and more often use belt conveyors for mining operations. The length of transporting rock mass could be several kilometers, so in most cases conveyor are used. The transported rock mass is rather heterogeneous, as a rule, it has inclusions in a form of large pieces with sharp edges and, in some cases, metal objects, which might cause longitudinal tears of various lengths on conveyor belts. They lead to significant repair costs or replacement of expensive conveyor belt, loss of transported material, and downtime of the major enterprise equipment. In the world practice various devices and systems to detect longitudinal tears on conveyor belts have been developed for their successful operation. In this paper, there is analysis of existing devices to detect longitudinal tears on conveyor belts based on the use of mechanical (detection of the transported cargo on the lower the conveyor section and measuring the belt width), ultrasonic and electro-magnetic energy, evaluation of changes in the magnetic field configuration, computer vision, infrared laser and x-ray radiation, image recognition software and embedded transponder chips.
Ensuring Energy Efficiency and Safety of the Cyclic Operation of the Mining Dump Truck
Authors: Kartashov Alexander , Kositsyn Boris , Kotiev George , Nazarenko Sergey , Dubinkin Dmitry
Published: June 2020

It’s known that the use of the automobile vehicles in a quarry for transporting the rock mass is characterized by a cyclic nature and the ability to overcome the slopes of up to 8-12% along the road as well as curves with the radii of at least 20-24 m. However, the disadvantage of this way of transportation of quarry loads is relatively high costs [1]. One of the ways to reduce costs is to implement the software-based operation of the mining dump truck while ensuring energy efficiency and safety. This way implies following the route “mine face – concentrator” when driving with the rock mass and the route “concentrator – mine face” when driving without a cargo along the specified trajectory and at a given driving speed using the information management systems in a quarry and on the board of the mining dump truck controlled by the driver as well as in an unmanned version in case of autonomous driving. The article describes the method to optimize the function “way – speed” and as a result the way to optimize the control of the traction electric motors in a mining dump truck during cyclic movement along the specified trajectory with a fixed time to pass the route in order to ensure energy efficiency and safety when using the method of dynamic programming developed by Richard Bellman.
Analysis of Compliance with the Requirements for Geohod Actuating device Circuit Design for Soft Rocks Destruction
Authors: Aksenov Vladimir , Nesterov Valery , Sadovets Vladimir , Pashkov Dmitry
Published: June 2020

The article presents an analysis of circuit decisions of the actuating device of the geohod for the destruction of soft rocks for compliance with the requirements for them. To set the relevant goals and objectives of the study, the features of the work of a new class of mining machines (geohods) and the main provisions of geohod technology are presented. As a result of the study by the method of multicriteria analysis, it was found that the knife actuating device of the geohod meets the most complete requirements for the actuating device of the geohod. Requirements and options for circuit design for knife actuating device of geohods have been developed. To analyze the previously developed circuit design of the knife actuating device of the geohod, the method of multi-criteria analysis of decision making was chosen. Because of the analysis, four options for circuit design of knife actuating device of geohods were reasonably selected. The tasks for further research are formulated.
Justification of the Number and Type of Tire Size for a Dump Truck with a Lifting Capacity from 90 to 130 Tons
Authors: Dubinkin Dmitry , Kulpin Alexander , Stenin Dmitry
Published: June 2020

The article substantiates the quantity and type of tire size for a dump truck with a carrying capacity from 90 to 130 tons. Types of tire sizes for dump trucks are given, as well as an analysis of applicable tires for dump trucks. An example of tire configuration for a dump truck is described, as well as the differences between projects and dump trucks with the traditional arrangement of large tires. The working productivity of large tires was cal- culated using the TKH “tons per kilometer per hour” technique. The general tasks that need to be addressed when designing a dump truck are highlighted. The conclusion is made on the relevance of the development of scientifically based approaches when designing dump trucks. The above data indicate that when surface mining, it is possible to solve the economic problem of reduc- ing the operating costs of transporting minerals by applying the proposed arrangement and number of large tires when designing new dump trucks, including robotic and unmanned ones.
On the Issue of Increasing Reliability of Electric Mining Machinery
Authors: Kashirskikh Veniamin , Zavyalov Valery , Semykina Irina
Published: June 2020

The paper considers conditions of mining machinery electric drives operation and analyzes the causes of insufficient reliability. To improve the reliability and efficiency of induction motors the authors propose the computer system designed for dynamic identification of electric motors to monitor their parameters and variables, which are estimated on operating equipment in real time. Operation of the system allows calculating unmeasurable quantities and is based on the mathematical model of the induction motor as well as mathematical methods of estimation and the information contained in the measured phase voltages and currents of the stator. For dynamic mode the mathematical model of the motor’s state and the measurement part were developed and certain results were obtained. Real-time information can be used for both control and management of electric motors, function testing, protection, forecasting as well as acceptance testing of electric motors in mining machinery electric drives to identify their individual data and quality control of the industrial processes in the manufacture or repair of motors.
Comfortable living environment as the basis for rural development in the mining region
Authors: Kosinskiy Piotr , Kharitonov Aleksey , Wolfson Eduard , Takhtayeva Rimma
Published: June 2020

The article is devoted to the study of the problems of mining industry development and its impact on the development of rural areas in the region. It is revealed that the intensive development of the mining industry is accompanied by negative environmental consequences associated with the impact on socio – economic development and the formation of a comfortable living environment and, as a result, the quality of life of the population of rural areas. The Kemerovo region characterized by a pronounced intensive development of the coal industry accompanied by air pollution, rejection of land with high fertile potential, and degradation of renewable natural resources. The activities of mining companies accompanied by the release of highly toxic and carcinogenic substances into the air. As a result, there is an increased morbidity and mortality of able-bodied residents of the region, a low life expectancy, and a decrease in the total rural population, which is faster than the urban population. To solve the identified problems, the author’s model of creating a comfortable living environment in the mining region proposed. The model makes it possible to assess the attractiveness of the territory when deciding on the future place of residence, and, also allows you to make informed management decisions aimed at improving the quality of life of people.
The cluster approach in the economic and innovative development of mining region (on the example of the Kemerovo region)
Authors: Shavina Evgeniya , Prokofev Viktor
Published: June 2020

The transition to sustainable development and the new industrial transformation of resource-dependent countries are closely intertwined. The cluster approach is an effective means of realizing industrial potential in the context of innovative development. Clusters’ innovation potential is influenced by the network synergies that result from active regional policies. The article considers the mechanism of supporting regional clusters by creating and maintaining the viability of regional innovative systems that enhance the effect of the creation of agglomerations, and allow industrial clusters to move to innovative clusters. The latter are the highest form of enterprise development, as the connection with territorial advantages is lost. In addition, the article raises the question of the feasibility of diversifying regional economies by creating tourist clusters and promoting their brands. This type allows economies to be more resilient to crises, to increase attention to environmental issues, and to further increase the revenue part of budgets.
Problems and Prospects of Regional Mining Industry Digitalization
Authors: Tyuleneva Tatiana
Published: June 2020

One of the problems of modernizing the mineral resource clusters` socio-economic sphere is to increase the competitiveness of mining enterprises, which can be achieved by reducing costs, improving product quality, and ensuring production safety. The article describes the directions of mining industry digitalization, the advantages of implementing digital technologies in the process of forming the finished products` cost and price, associated with increasing the reality of the resource base, optimizing the cost of materials and equipment, improving the system for predicting production failures, monitoring the implementation of the plan. The risks of using digital technology in mining enterprises due to insufficient automation of production processes, ensuring cybersecurity and staff qualifications are listed. In addition, there is a justification for the existing potential and identified threats, and the technologies used in the implementation of the federal and regional digitalization program or planned for use in the next year by enterprises of the Kuzbass coal mining industry, as well as the problems associated with their implementation are described.
Competitiveness Education Strategies in Training Experts for Coal Mining Region
Authors: Mityakina Olga , Monastyrskaya Elena , Silkova Maria
Published: June 2020

Methods and strategies of developing students’ skills for further successful employment in coal-mining region are considered. Combined techniques as to let students demonstrate their competitiveness abilities and qualifications are studied and criteria of objective assessment and expert advice are presented. The process of globalization has significant impact not only on industrial sphere all over the world but it has affected a lot of other human activities, and mining education is not an exception. Innovative determinant of mining education globalization obviously implies the need of integrating both technical and humanitarian subjects while training prospective experts. Combining different methods helps students develop their competitiveness abilities estimated highly in the coal mining labor market. The important methods of forming graduates’ readiness to compete in coal mining industry activate the linguistic representation of different aspects of employment by means of pedagogic techniques within humanitarian disciplines. The main stages of the comprehensive method named assessment-centre are also shown. So, developing students’ competitiveness ability for successful employment in the sphere of coal mining industry includes both theoretical and practical training to provide effective information searching for vacancies and distributing information about themselves as applicants as well as successful job interview in coal mining region.