bluuebunny/crossref_metadata_2025 huggingface dataset:
CONFERENCE TIME IN THE LIBRARY AND INFORMATION SCIENCES. PART 2: ANALYSIS OF PUBLICATION ACTIVITY AND CITATION
Authors: KOLESNYKOVA Tetiana O.
Published: December 2020

Objective. The second part “Conference time in the library and information sciences” of the study is aimed at conducting a bibliometric analysis of the publication activity and citation of the authors presenting their papers at international conferences indexed in Scopus and/or Web of Science (CC). Methods. Bibliometric analysis of publications that are Conference proceeding (“proceedings paper” and/or “conference paper”) was carried out using the Scopus and Web of Science (CC) citation databases. Using a comparative analysis, the obtained data, covering the “conference paper”/“proceedings paper” publication type for all years of their reflection in each of the databases, as well as in chronological frames from 2016 to 01.06.2020 were studied. Results. Analysis of the publication activity of LIS university (academic) researchers shows that Scopus (n=4561) contains more documents than WoS database (n=4145). The growth of Open Access (OA) documents in both databases is significant since 2000. But the period 2016-01.06.2020 demonstrates a slight dominance of the number of OA publications in Scopus (n=192) compared to WoS (n=185). Distribution data by authors, universities, countries, knowledge areas were also obtained. Citation analysis shows poor results on both bases, which may be due to the focus of conferences on rapidly changing topics. Conclusions. Showing the relatively low LIS coverage in university research, as well as low citation rates, this paper demonstrates that LIS researchers/practitioners need to create more quality publications to be recognized as an important area. The author hopes that this work will generate great research interest in the field of LIS and understanding the great value of Conference proceeding as a publication containing original/primary research results.
The Employees Perception on Technology Adoption in Banks: An Empirical study on Two Major Private Banks
Authors: Ganguly Ajay Kumar , Chattopadhyay Subrata
Published: December 2020

With the recent advancement and adoption of state of the art mobile and internet technologies in different banks, the financial sector specially banking industry has undergone massive changes all over the world. The technological waves are reshaping the total banking landscape and the
environment of the banking sector has gradually become highly aggressive today in Indian context also. The present research paper mainly focuses on the employees’ [of the banking industry] perception towards the adoption of new internet and mobile technologies in banks. The paper is
mainly designed to evaluate the awareness level of the technologies offered by the banking sector and overall perception of employees on these technological offerings. The paper also try to exhibit the employees’ perception on technological adoption in the banking sector. A well-structured
questionnaire has designed and an extensive survey was undertaken among 100 employees of ICICI Bank & Axis Bank of North 24 Parganas District of West Bengal. Some useful, relevant descriptive statistics is used in this study. On the basis of this study, it is found that, almost all the
employees, of these two Private Banks, found the overall performance of tech-banking as satisfactory.
New ‘Antigens’ in Membranous Nephropathy
Authors: Sethi Sanjeev
Published: December 2020

Membranous nephropathy (MN) occurs due to deposition of immune complexes along the subepithelial region of glomerular basement membrane. Two previously identified target antigens for the immune complexes, PLA2R (identified in 2009) and THSD7A (in 2014), account for approximately 60% of all MN, both primary and secondary. In the remaining MN, target antigens were unknown. Use of laser microdissection and mass spectrometry enabled identification of new “antigens.” This approach led to the identification of four novel types of MN: exotosin 1 (EXT1)– and exotosin 2 (EXT2)–associated MN, NELL1-associated MN, Sema3B-associated MN, and PCDH7-associated MN. Each of these represents a distinct disease entity, with different clinical and pathologic findings. In this review, the structure of the proteins and the clinical and pathologic findings of the new types of MN are discussed. The role of mass spectrometry for accurate diagnosis of MN cannot be overemphasized. Finally, any classification of MN should be made on the basis of the antigens that are detected. Further studies are required to understand the pathophysiology, response to treatment, and outcomes of these new MNs.
Rasgos de personalidad y bullying LGTB-fóbico
Authors: Larrain Mariño Enara , Mollo Torrico Juan Pablo , Garaigordobil Landazabal Maite
Published: December 2020

El bullying es un fenómeno que está generando gran interés científico, aunque existe aún un gran vacío en cuanto a las investigaciones dirigidas a estudiar el bullying que tiene como causa la LGBT-fobia. Este estudio tiene como objetivo realizar una revisión sobre los estudios que analizan rasgos y características de personalidad en el colectivo LGBT y especialmente la conexión entre bullying LGBT-fóbico y estas variables personales. Con esta finalidad, se ha llevado a cabo una revisión sistemática y se han obtenido los siguientes resultados: (1) Las personas LGBT muestran mayores niveles de empatía y menores niveles de satisfacción con la vida, bienestar y felicidad; (2) la empatía correlaciona negativamente con la perpetración de bullying LGBT-fóbico, y (3) ser víctima de este fenómeno disminuye los niveles de autoestima. Algunos rasgos y características de la personalidad pueden ser relevantes para diseñar programas de prevención-intervención, por lo que sigue vigente la necesidad de continuar investigando en esta línea.
Cambios en los significados de la masculinidad en hombres del sur de Chile
Authors: Poo Ana Maria , Vizcarra Maria Beatriz
Published: December 2020

En América Latina, los estudios sobre masculinidades e intervención con hombres, desarrollados en las últimas décadas, han buscado conocer las subjetividades y prácticas, así como los modelos y mandatos de la masculinidad, visibilizando la participación de los hombres en algunas desigualdades de género (Aguayo y Nascimento, 2016; Olavarría, 2017). Si bien estos estudios muestran una evolución en el modelo tradicional de masculinidad, en América Latina, y en especial en Chile, existen brechas de conocimiento acerca de las diferencias en las representaciones de la masculinidad en distintas generaciones y contextos sociales (Aguayo y Nascimento, 2016). El objetivo del presente estudio fue describir los significados de la masculinidad en hombres del sur de Chile, comparando generaciones y niveles socioeconómicos. Se utilizó un diseño de casos múltiples; la muestra estuvo constituida por jóvenes (18 a 24 años) y adultos medios (45-69 años) distribuidos en tres niveles socioeconómicos. Se desarrollaron seis grupos de discusión. Para el análisis de la información se llevó a cabo un primer nivel de codificación abierta, estableciendo unidades de significado. Estas unidades fueron transformadas por medio de un proceso inductivo en categorías, las cuales fueron comparadas para identificar similitudes, diferencias y posibles vínculos entre ellas. Se encontraron coincidencias y diferencias en los significados asociados a la masculinidad, en función de la edad y del nivel socioeconómico. Las coincidencias en función de la edad se dieron principalmente en las categorías Identidad y Trabajo, y las mayores diferencias en el núcleo Sexualidad, mientras que en función del nivel socioeconómico la mayor diferencia estuvo en la categoría Trabajo.
Funciones ejecutivas entre músicos y no músicos
Authors: Hernández Mónica , Molina-Delgado Mauricio , Smith-Castro Vanessa , Rodríguez-Villagra Odir Antonio
Published: December 2020

Se ha sugerido que la práctica profesional de un instrumento musical esta relacionada con mejores puntajes en tareas de funciones ejecutivas. Con el fin de examinar sistemáticamente esta hipótesis se realizó un metaanálisis para identificar el efecto de la interpretación de un instrumento en las funciones ejecutivas, así como las variables que podrían moderar dicho efecto. El metaanálisis incluyó estudios empíricos que: (1) compararon los puntajes en medidas de funciones ejecutivas entre músicos y no músicos; (2) reportaron las medias y desviaciones estándar; (3) el grupo de comparación no recibió entrenamiento musical; y (4) los participantes no presentaron discapacidad motora o cognitiva. Se identificó que los músicos, en comparación con los no músicos, muestran mejores puntajes en tareas de funciones ejecutivas (d = .712). Los resultados apoyan la hipótesis de que la práctica de un instrumento musical está relacionada con mejores puntuaciones en tareas de funciones ejecutivas.
Determination of different shoot pruning efficiency for controlling Lasioptera sp. (Diptera: Cecidomyiidae) in protected tomato cultivation and pests visual preferences
Authors: Büyüköztürk Hasan , Keçeci Mehmet , Bilgin Mustafa , Ölçülü Murat , Yücel Seral
Published: December 2020

Lasioptera sp. is one of the problematic pests in the Mediterranean and Aegean regions where protected tomato cultivation is done in Turkey. The larvae that cause tunnel and deteriorations in the plant’s main stem by feeding on the core part of the body mostly lead to the death of the plant in a dense pest population. Since harmful larvae live in plant tissue and thus are protected against insecticides and biological agents, control of the pest is very crucial. As an alternative method to pest control, the effects of tomato axillary shoot pruning for controlling the pest were examined. For this purpose, while pruning of axillary shoots in tomato plants as recommended in cultural processes, shoots that are cut off from the body completely and stub-pruning sprouts with 3-5 cm length were assessed in the experiment. The study was carried out in Erdemli district of Mersin province in 2015 and 2017. Although it is ensured that the harmful larvae can feed inside stub-pruned shoots left on the body, the larvae could not reach the plant’s main stem and do not cause any damage to the plant. In terms of damaged plants, it was determined that 77.8% and 85.2% of the stub-pruning application are effective in 2015 and 2017, respectively. Additionally, in the study, the attractiveness of visual sticky traps in six different colors including, yellow, black, blue, white, red, and green was investigated. As a result of the study, it was concluded that the colors tested were not sufficient to attract pests.
Ilıman iklim meyve türlerinde bulunan Aphid türleri (Hemiptera: Aphididae), doğal düşmanları ve sekonder konukçuları
Authors: Alaserhat İsmail , Güçlü Şaban
Published: December 2020

Bu çalışma, Erzincan ve Gümüşhane illerinde yetiştirilen ılıman iklim meyve türlerinde bulunan yaprakbiti türleri ile doğal düşmanlarının tespit edilmesi amacıyla 2011-2013 yıllarında yapılmıştır. Örnekleme, yaprakbiti popülasyonunun yoğun olduğu ilkbahar (mayıs-haziran) ve sonbahar aylarında (eylül-ekim) iki haftada bir, yoğunluğun azaldığı yaz aylarında (temmuz-ağustos) ise ayda bir kez yapılmıştır. Çalışma sonucunda Aphis, Anuraphis, Anoecia, Brachycaudus, Chromaphis, Dysaphis, Eriosoma, Hyalopterus, Myzus, Ovatus, Panaphis, Pterochloroides ve Rhopalosiphum (Hemiptera: Aphididae) cinslerine giren toplam 24 yaprakbiti türü ve bu türlerin 13 sekonder konukçusu tespit edilmiştir. Bu yaprakbitlerinin doğal düşmanları olarak 65 predatör, 11 parazitoit ve 2 entomopatojen olmak üzere toplam 78 tür saptanmıştır.
Citrus aphids (Hemiptera: Aphididae): incidence, population fluctuations, host plant and age preferences
Authors: Satar Serdar , Karacaoğlu Mehmet , Satar Gül , Uygun Nedim
Published: December 2020

Citrus plantations are suffered from many different pest species in East Mediterranean Region. Among them, aphids (Hemiptera: Aphididae) are one of the important groups. Some species such as Aphis gossypii Glover, Aphis spiraecola Patch, Aphis craccivora Koch, Aphis (Toxoptera) aurantii (Boyer de Fanscolombe) and Myzus (Nectarosiphon) persicae (Sulzer) (Hemiptera: Aphididae) cause harm especially young citrus orchards. This study aimed to investigate regional distribution, seasonal fluctuation, host and host age preferences within citrus species of these aphid species in 15 sub-regions from Adana, Hatay, Osmaniye and Mersin between 2007 and 2009. While the mandarin was more preferred than other citrus species, grapefruit was the least preferred citrus species among in all the three provinces. Among the citrus species in the Mersin region, A. spiraecola was the most common in lemons, while A. (T.) aurantii preferred mandarin compare to others. In Adana and Hatay regions, mandarin was the most preferred citrus species for all aphid species except M. (N.) persicae. Aphid preferences depending on the age showed differences in citrus age scale by region. A. (T.) aurantii, on the other hand, had the highest rate of presence between the ages of 11-20 in Hatay and between the ages 21-40 in Mersin. The prevalence of citrus varieties in Adana and Hatay parallelly affected the distribution of aphids. However, A. spiraecola was dominant aphid species on the lemon. Adana, which has a richer flora compared to Mersin and Hatay regions, has been determined the highest aphid density in different species. The fact that Aphis goosypii and A. spiraecola create up to 30-40% infections rate in citrus orchards not only in spring, but also in July, and intense again in autumn have made these pests harmful for four seasons.
Computer Modeling and Optimization of Soil Thawing Using Microwave Energy
Authors:   Bauman Moscow State Technical University, Harutyunyan Robert
Published: December 2020

A mathematical model is developed to calculate the electromagnetic field A mathematical model is formu-lated, and a finite-difference method and computer programs are developed that allow effective computer mod-eling and optimization of high-speed soil thawing processes in various ways, including using magnetrons. As the main modeling method, a variant of the end-to-end "enthalpy" method without smoothing the concentrated heat capacity is used. A series of calculations was performed for the informative case of Sandstone and sandy loam during thawing by magnetrons of standard structures. The significant influence of nonlinearities of ther-mal parameters, phase transitions of melting and evaporation, and the type of boundary conditions on the val-ues of temperature and electric fields is established. The effect of losses on convective cooling and evaporation is negligible. The results of the work can be applied in the practice of research and design of earthmoving op-erations in the cryolithozone.
Electric Multiple Units With Energy Storage – Alternative to Electrification of New Lines in Three City
Authors:   Politechnika Gdanska, KARKOSINSKI Dariusz , MACEDONSKA Dominika ,   Politechnika Gdanska, KARKOSINSKA BRZOZOWSKA Natalia KARKOSINSKA BRZOZOWSKA ,   Politechnika Gdanska
Published: December 2020

The application of modern EMUs in Trójmiasto has been discussed in the paper. A new line between Gdańsk Śródmieście and Orunia Górna has been proposed as well as the reconstruction of lines running to northern quarters of Gdynia. Trójmieście transport system has been analysed from the viewpoint of operation of energy storage trains. Moreover the route Orunia Górna – Wrzeszcz – Osowa – Chylonia – Port Oksywie has been proposed, with alternating electrified and non-electrified sections. The initial calculations have been conducted.
Visual Sources of Old Russia in Historical Research: Some Methodological Observations
Authors: Sukina Ludmila
Published: December 2020

The article considers the problem of the methodological difficulties of the work of historians with visual sources of Old Russia. Its relevance is determined by the paradoxical epistemological situation that has developed in historical science as a result of a visual turn. Historians who are researching Old Russia and constantly experiencing a shortage of sources could significantly expand the source base at their disposal, but they traditionally do not appreciate the information potential of ancient Russian art. The article analyzes methodological ideas related to the problems of “decryption” and interpretation of information from Russian and European medieval visual sources contained in the works of structuralism (Lotman, Uspensky), specialists in the field of iconography and iconology (Panofsky, Gombrich), symbolic history (M. Pasturo), soutce study methodologist Lappo-Danilevsky. The species and historical features of this type of sources create serious difficulties for historians, require the development of a methodology for working with “unrealistic” images, but also open up prospects for a meaningful enrichment of research. Russian and foreign science has accumulated sufficient theoretical and practical experience in this area. Therefore it is hoped that research on the visual sources of Old Russia will expand and take its rightful place in the corpus of historical knowledge.
To Believe Firmly: Desiring Faith and the Cost of a Mistake
Authors: Rakhmanin Alexey
Published: December 2020

Discussion: Butakov, P. A. 2020. “Vo chto i kak nado verit’: otvet sobesednikam [What to Believe and How to Believe It: A Response to My Interlocutors]” [in Russian]. Filosofiya. Zhurnal Vysshey shkoly ekonomiki [Philosophy. Journal of the Higher School of Economics] 4(4), 167-184.
How Two Minds Can Know One Thing
Authors: James William
Published: December 2020

Translation of: James, W. 1905. “How Two Minds Can Know One Thing.” The Journal of Philosophy, Psychology and Scientific Methods 2 (7): 176–181.
Exploring Idiographic Approaches to Children's Executive Function Performance: An Intensive Longitudinal Study
Authors: Yu Dian , Yang Pei-Jung , Geldhof G. John , Tyler Corine P. , Gansert Patricia K. , Chase Paul A. , Lerner Richard M.
Published: December 2020

Traditional variable-centered research on executive functions (EFs) often infers intraindividual development using group-based averages. Such a method masks meaningful individuality and involves the fallacy of equating group-level data with person-specific changes. We used an intensive longitudinal design to study idiographic executive function fluctuation among ten boys from Grade 4. Each of the participants completed between 33 and 43 measurement occasions (M = 38.8) across approximately three months. Data were collected remotely using a computerized short version of the Dimensional Change Card Sort task. Multi-group analyses of three participant pairs (Participants 5 and 3, 5 and 2, and 5 and 6) demonstrated that Participant 5 differed from Participants 3 and 2 in different ways but Participants 5 and 6 were similar in all comparisons. Dynamic structural equation modeling demonstrated unique individual trajectories, which were not represented by the trajectory of group-averages. Although more than half of the participants showed a negative association between EFs and inattention, two participants showed a positive association between EF and inattention. This study demonstrated meaningful person-specific trajectories of EFs, suggesting that future study should undertake the analysis of individual development before data-aggregation or generalization from aggregate statistics to individuals.
Cluster Analysis of Child Externalizing and Prosocial Behaviors in a Randomized Effectiveness Trial of the Family-Check Up and Internet-Delivered Parent Training (iComet)
Authors: Björnsdotter Annika , Ghaderi Ata , Enebrink Pia
Published: December 2020

Objective: To explore whether children with various externalizing/prosocial behavior profiles benefit differently from face-to-face training than from an internet-based parent management training (PMT) programme. Methods: A total of 231 families with children (aged 10 to 13 years) with externalizing behavior problems (EBP) were randomized to receive either the Family Check-Up, delivered by therapists in the community, or the internet-based PMT program (iComet).   Person-oriented analysis was used for subtyping the children according to combinations of prosocial behavior and EBP. Results: The person-oriented analysis resulted in five significantly different clusters. There were no significant differences between the five clusters in relation to the total difficulties score of the Strengths and Difficulties Questionnaire, family warmth or family conflict, but the within-group effect sizes for the main outcome (total difficulties score) from baseline to post-treatment varied from Cohen’s d of 0.52 to 2.56. There were no significant interaction effects between the clusters and type of intervention. However, for children high on symptoms of attention deficit hyperactivity disorder and moderate to high on oppositional defiant disorder, and low to relatively high on prosocial behaviors (Cluster 3 respectively 5), substantial residual EBP-symptomatology remained at post-treatment, although both interventions resulted in significant effects. The other three clusters were within the non-clinical EBP-range at post-intervention, irrespective of treatment condition. There were no significant differences between the clusters regarding treatment completion rate (ranging from 47.2% to 67.4%). This study illustrates the value of distinguishing between different profiles of children in the context of PMT for parents of children with EBP.
Improving the efficiency of electric arc furnaces through improved control algorithms for electrical modes
Authors:   Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia), Nikolaev A. A. , Kornilov G. P. ,   Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia), Tulupov P. G. ,   Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia), Nikiforov G. V. ,   Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia)
Published: December 2020

The aim of this study is to increase the efficiency of electric arc furnace through the use of advanced control algorithms for electrical modes. It was established that despite the common structure of the electric control system, as well as the approach to diagnosing the stage of the technological process, the criteria for switching from one combination of the furnace transformer tap and operating curve to another for electric arc furnaces and ladle furnaces are different. So, for EAF it is advisable to use a system in which a separate analysis of the signals of the relative effective value of the total even and odd harmonics of electric arc current (voltage) should be applied. It’s important to note that at the initial stage of melting it’s preferable to use even harmonics, and at the final stage of melting - odd harmonics. In it’s turn, during melting in LF, the argon blow mode and the slag mode have a significant role. Intensive blowing modes lead to the appearance of a metal mirror with the occurrence of bursts that occure short-circuit of the electric arc and lead to not optimal electric mode. According to the results of the analysis, a number of recommendations have been formulated that can have practical application in modernizing of modern control systems, aimed at optimizing production energy costs and reducing the unit cost of the final product of the metallurgical cycle. Moreover, the experience of implementing the described ides shows (for shaft-type electric arc furnace with capacity 125 ton, 85 MVA and ladle furnace 25 MVA) that the economic effect is 2.5% in terms of saving electric energy and 2% in terms of saving the consumption of electrodes. It’s a significant indicator taking into account the high energy intensity of modern electric steelmaking shops. This work was supported by the Ministry of Science and Higher Education of the Russian Federation (project No. FZRU-2020-0011).
Research of the influence of material composition and size of iron quartzites of the Olenegorsk deposit on the results of dry magnetic separation
Authors:   Branch of the Murmansk Arctic State University (Apatity, Russia), Tereshchenko S. V. , Shibaeva D. N. ,   Mining Institute of Kola Science Centre of RAS (Apatity, Russia), Alekseeva S. A. ,   Mining Institute of Kola Science Centre of RAS (Apatity, Russia), Kompanchenko A. A. ,   Geological Institute of Kola Science Centre of RAS (Apatity, Russia)
Published: December 2020

On the example of a sample of ferruginous quartzites from the Olenegorskoye deposit, the possibility of preliminary concentration by dry magnetic separation (DMS) has been established. The mineralogical and petrographic studies have shown that, in terms of their textural and structural features and mineral composition, ferruginous quartzites may be divided into two types, differing in the amount of hematite included in their composition, which indicates the possibility of using DMS to generate the following three separation products: magnetite, hematite-magnetite, and rock. DMS with the use of a laboratory drum magnetic separator allowed selecting the upper size limit of 80 mm for lumps entering the separation. At the same time, 24.7 to 26.0 % of all waste and low-mineralized rocks with the mass fraction of Fetot of 4.51 to 6.07 % are transferred to the non-magnetic fraction during the separation of classes of –80+50 and –50+25 mm. For the size class of –25+10 mm, the yield and Fetot values are within the same limits. It has been shown that sulfidecontaining rocks and rocks of increased strength (with the strength coefficient of at least 23) are separated into the non-magnetic fraction. The strength of ferruginous quartzites does not exceed 20. This rock strength ratio confirms improved crushing and grinding efficiency. The possibility of separation of the magnetic fraction with the particle size of –80+25 mm into the following products has been established: the magnetite-hematite product (MF-1 + MF-2) with the mass fractions of Femagn 43.3% and Fehem 14.9 %, and the predominantly hematite product (MF-3 + MF-4) with the mass fractions of Femagn 1.1 % and Fehem 67.9 %.
Ultrafine dry grinding of talc by planetary mill: effects of operating conditions
Authors:   Bisha University, Bisha, Kingdom of Saudi Arabia, El-Mofty S. E. , Abuhasel K. A. ,   Bisha University, Bisha, Kingdom of Saudi Arabia, Elbendari A. M. ,   Central Metallurgical Research & Development Institute, Cairo, Arab Republic of Egypt, El-Midany A. A. ,   Cairo University, Giza, Arab Republic of Egypt
Published: December 2020

Ultrafine grinding is required in most industrial applications of talc. In this work, a planetary mill was used to produce a d50 product of less than 5 μm. The effects of grinding time, media size, mill filling, rotational speed, and media-to-powder ratio, as the main grinding parameters, were initially investigated by the one-variable-at-a-time strategy. In addition, the statistical design method was applied to optimize and correlate the d90 and d50 of the ground product to the media-to-talc percentage and grinding time, being the most significant variables for talc grinding in a planetary mill. The results indicate that the ball size significantly affects the product fineness up to a certain ball size (i. e., 4 mm), after which the product becomes coarser. At the same time, lower mill filling and higher mill rpm yield finer products. The agglomeration of particles under dry conditions is the main constraint to size reduction below certain limits. The maximum size reduction obtained in grinding with the 85 % media-to-powder ratio, 30 % mill filling, and higher rotational speed (300 rpm) during 30 min grinding cycles was 14.6 μm and 4.5 μm for d90 and d50 of the ground product, respectively.
Research of the properties of magnetic fillers of cylindrical shape
Authors:   MIREA – Russian Technological University (Moscow, Russia), Sandulyak A. V. , Tkachenko R. Yu. ,   MIREA – Russian Technological University (Moscow, Russia), Sandulyak A. A. ,   MIREA – Russian Technological University (Moscow, Russia), Ershova V. A. ,   Moscow Polytechnical University (Moscow, Russia)
Published: December 2020

It has been noted that the information on magnetic properties of specific magnets available in the design and operation of magnetic separators/analyzers using magnetic fillers in the form of balls as the working body (polygradient type) is extremely limited, especially for magnets with varying sphericity coefficients (mutual ratios of characteristic sizes). Experiments using cylindrical samples (porous) as a ferromagnetic matrix rendered the induction data subsequently applied to establish the magnetic permeability, susceptibility, and magnetization values for the samples at various values of the length-todiameter ratio of φ = 1–16. The demagnetizing factor N was obtained and analyzed for the «short» samples (1 ≤ φ [φ]) in the range of magnetizing field strengths of 9–47 kA/m, taking into account the established transient value of φ = [φ] = 10–12 (when, at φ ≥ [φ], the magnetic properties of the sample correspond to the magnetic properties of its quasi-solid material). The analysis results for these data, required when assessing the actual magnetic properties of «short» working bodies, characteristic of polygradient magnetic separators/ analyzers, demonstrate the validity of the exponential dependence (decreasing with increasing) of their demagnetizing factor. The research was carried out with the financial support of the Ministry of Education and Science of the Russian Federation within the framework of the State Assignment in the field of science (project No. 0706-2020-0024) and of the Russian Foundation for Basic Research and the Royal Society of London under research project No. 20-52-10006.
Rare-earth metal ore processing technologies when developing new deposits
Authors:   NUST MISIS (Moscow, Russia), Yushina T. I. , Petrov I. M. ,   INFOMINE Research Group (Moscow, Russia), Cherny S. A. ,   Berezniki Branch of PNRPU (Berezniki, Russia), Petrova A. I. ,   Research Institute of Comprehensive Exploitation of Mineral Resources of RAS (IPKON) (Moscow, Russia)
Published: December 2020

The article provides a brief overview of processing technologies for rare-earth raw materials used under greenfield development projects in different countries of the world (Africa, Greenland, Australia, Canada). The projects feature deposits with different mineral compositions, mass fractions of rare-earth metals (REM) in ores of 0.2 to 15 %, and the presence of niobium, zirconium, tantalum, phosphorus, uranium, and thorium. The resulting production facilities will extract 180 kt to 7.2 Mt rare-earth ore annually to generate 1.5 to 20 kt oxides of heavy and light groups of rare-earth metals along with the rare metals. The analysis of technologies for the projects considered demonstrates that magnetic and radiometric separation, dense-medium concentration and flotation with hydrometallurgical processing in the form of leaching with sulfuric or hydrochloric acid, followed by extraction of the target products, will be used for the processing of rare-earth raw materials. A characteristic feature of a number of projects is, first of all, the direct hydrometallurgical processing of the feed. The concentration technologies for ores containing rare-earth metals also indicate a clear trend towards a more active use of high-intensity magnetic separation. The main products to be obtained with these technologies will include composite concentrates of oxides or carbonates of rare-earth metals. At the same time, the commissioning dates for the projects are being repeatedly postponed; the implementation of many projects remains uncertain, which is largely due to the stagnant dynamics of global prices for rare-earth metals.
Application of SWOT analysis to select pyrometallurgical techniques for copper-nickel sulphide concentrates. Part 2. Use of quantitative SWOT analysis to calculate the key performance indicators of pyrometallurgical processes applied to concentrates
Authors:   Gipronikel Institute LLC, Saint Petersburg, Russia, Parkhomenko I. Yu. , Zlotnikov K. P. ,   Chernogorskaya Mining Company LLC, Moscow, Russia, Sidorova E. Yu. ,   National University of Science and Technology MISiS, Moscow, Russia
Published: December 2020

This study is aimed at conducting an in-depth analysis and interpreting the outcomes of the SWOT analysis conducted in the first part of this study with the help of an additional quantitative analysis and calculation of the so-called key performance indicators, which were obtained with the help of the above mentioned technique. This paper examines a classical SWOT analysis and some application cases. It is proposed to use this method to achieve the above aim. A quantitative SWOT analysis of the techniques has been performed, and a specific weight has been calculated for each factor. The obtained results have been converted into percentages. The following key performance indicators have been introduced to estimate the efficiency of pyrometallurgical techniques in terms of SWOT analysis and the project in general: the ability to overcome threats, development potential, application prospects, the probability of the weaknesses to grow, future status of the technique. A result has been obtained and analyzed. Conclusions have been drawn on the potential implementation of these techniques and the results gained. By calculating the key performance indicators, the authors were able to identify the advantages offered by certain techniques and highlight what is characteristic of the pyrometallurgical techniques in the current environment. The latter enabled to come up with an efficiency ranking. An initial cost-effectiveness analysis has been carried out based on expert evaluation. This study can be used to issue further recommendations on choosing the most advanced pyrometallurgical techniques for copper-nickel sulphide concentrates, which will be based on in-depth analysis of the overall SWOT indicators through conducting a detailed feasibility study.
Predicted concentration performance for copper-nickel ores of the Talnakh ore cluster
Authors:   Gipronikel Institute LLC, Saint Petersburg, Russia, Khashkovskaya T. N. , Lyalinov D. V. ,   Gipronikel Institute LLC, Saint Petersburg, Russia, Kolesnikova E. N. ,   Gipronikel Institute LLC, Saint Petersburg, Russia, Maksimov V. I. ,   Gipronikel Institute LLC, Saint Petersburg, Russia
Published: December 2020

This paper describes a mineralogical study that looked at the copper-nickel ores of the Talnakh Ore Cluster. It also describes attempts to develop a method for predicting concentration performance on the basis of mapping data. The geological classification of the Talnakh ores developed in 1987–1992 is rather a classification of natural types and varieties as it fails to specify any particular concentration process indicators. The copper-nickel ores of the Talnakh Ore Cluster are multicomponent and it is quite difficult to develop a classification based on concentration performance that would account for the quality of concentrates and the recovery of non-ferrous and noble metals. In the period of 2015–2020, a series of experiments and a mineralogical study were conducted for 107 samples of impregnated ore, 105 samples of copper ore and 60 samples of high-grade ore under the contracts with the R&D Office of Nornickel’s Polar Division. Based on the results of the experiments, a classification was developed for impregnated, copper and high-grade ores based of one selected actual process indicator. Due to the use of a mining information system, each box of a block model representing an ore body (or, each mining unit with known characteristics) can be assigned appropriate concentration indicators. On the basis of geological mapping results, a method was applied for indirect calculation of expected concentration indicators based on a number of attributes. With the help of this method, the authors were able to determine the actual indicators, estimate the calculation error and find a way to improve the predictability of the model through analyzing additional samples and attributes.
Behaviour of selenium and tellurium in copper electrowinning process
Authors:   Gipronikel Institute LLC, Saint Petersburg, Russia, Zatitskiy B. E. , Trubina O. A. ,   Gipronikel Institute LLC, Saint Petersburg, Russia
Published: December 2020

The revamping project to be implemented at Norilsk Nickel’s refining facilities includes commissioning of a nickel plant and increasing the output of copper obtained by electrowinning from liquors produced in matte leach processes. At the revamped facility, a major portion of selenium and a considerable share of tellurium will be transferred with calciner gases to a sulphuric acid facility. The microimpurities that remain after calcination get distributed between the leachates. Considering that semiproducts keep circulating between the nickel and copper plants, selenium and tellurium can accumulate in the product solutions and thus affect the quality of finished metals. This paper examines the behaviour of selenium and tellurium in copper electrowinning process and formulates certain requirements for copper electrolyte that will ensure production of high-purity copper cathodes for commercial application. It is shown that, at low concentrations of selenium (IV) and tellurium (IV) in the copper electrolyte, their discharge follows the laws of diffusion kinetics, i.e. occurs at maximum current, together with cathode reduction of copper, and the concentrations of selenium and tellurium in copper change in correlation with the concentration of chalcogenides in the solution. Simultaneously with cathode reduction on a lead anode, selenium (IV) and tellurium (IV) get oxidized to selenium (VI) and tellurium (VI) that are not precipitable with copper and get accumulated in circulating solutions. It is shown that the concentration of chalcogenides has a negative first order from the removal of copper per unit volume of electrolyte. That’s why the contamination of cathode copper with selenium and tellurium rapidly decreases with an increase in copper removal. The paper provides data that can be used to estimate the allowable concentration of toxic microimpurities in the feed electrolyte that would not affect the desired copper purity level.
Optimized product quality control at Kola MMC’s mineral processing plant
Authors:   Gipronikel Institute LLC, Saint Petersburg, Russia, Glazatov A. N. , Molodtsev M. S. ,   Kola MMC, Monchegorsk, Russia, Kazakov A. M. ,   Kola MMC, Monchegorsk, Russia, Brazyulis L. A. ,   Kola MMC, Monchegorsk, Russia
Published: December 2020

Kola MMC’s Mineral Processing Plant has optimized its product quality control system designed to monitor the mass concentration of non-ferrous metals in the commercial products: i.e. the finished concentrate and the final tailings. Thus, automatic samplers and dividers of Sections 1, 2 and 3 have been made fully conforming with GOST 14180–80; through experiments, variation coefficients have been determined, which were used to specify the homogeneity class for the concentrate and the tailings; operating parameters have been defined for the sampling and sample preparation equipment; through experiments, intermediate precision mean square deviations (Sопр) and intermediate precision limits (RLопр) have been determined. Measurement procedures have been developed that were certified by Rosstandart, Russia’s Federal Agency for Technical Control and Metrology.
Developing the atomic spectrometry techniques for cobalt and nickel analysis
Authors:   Gipronikel Institute, Saint Petersburg, Russia, Korotkov V. A. , Velikaya T. I. ,   Gipronikel Institute, Saint Petersburg, Russia, Poslavskaya E. S. ,   Gipronikel Institute, Saint Petersburg, Russia
Published: December 2020

The existing methods standardized for to cobalt and nickel analysis, i.e. GOST 13047–2014, GOST 6012–2011 and GOST 8776–2010, don’t correspond to the current and future requirements to these metals in terms of impurities concentration. GOST 13047–2014 provides single-element analysis applications that establish a sample preparation for single element only, takes a lot of efforts and an extremely long time, consume a lot of chemical reagents and are associated with a significant harmful impact on the environment. Being a multielement technique, atomic emission spectrometry with DC-arc spectrum excitation is associated with a high consumption of chemical reagents and a significant environmental impact. It doesn’t allow determining the sulfur and other important impurities. All standard techniques are based on the obsolete principle to dissolve the samples in glass beakers on hot plates. The authors of this paper propose to standardize the methods of atomic emission spectrometry and mass spectrometry (MS) with inductively coupled plasma (ICP) to run cobalt and nickel analysis. 2.5 g samples of cobalt and nickel were proposed to decompose in a mixture of acids in closed polypropylene vessels heated in HotBlock systems at the temperature of 110 оC. This saved up to 5 cm3 of nitric acid and up to 5 cm3 of hydrochloric acid. The solutions of nickel and cobalt were analyzed for impurities on an iCAP 6500 Duo spectrometer at low plasma discharge power and using the base lines as an internal standard. This helped to improve the detection limits of impurities. To select optimal wavelengthes, full spectra of analyzed solutions were captured. Isotope 185Re was chose as internal standard and a collision and reaction cell was used to remove interfering polyatomic ions on an ICP-MS spectrometer iCAP Qc. Nickel and cobalt samples as well as CRMs were analyzed. The impurities detection limits with the current and future cobalt and nickel grades. The methods developed may create the basis for a new GOST standard applicable to cobalt and nickel analysis.
Understanding How Gastronomy Behaviours Influence the Repatronage Intention of Malaysian Muslim Tourists’ toward Japanese Street Food Vendors
Authors: Maknu Tengku Sharifeleani Ratul , Abdul Manan Hasman , Ariffin Shahira , Nur Izzatie Wan
Published: December 2020

The paper investigates the influences of gastronomy behaviours on the repatronage intention (RI) of Malaysian Muslim tourists toward Japanese street food vendors. The present literature review showcased multiple studies on street food vendors at various destinations. Despite this fact, there is a lack of information concerning Malaysian Muslim travellers and Japanese street food vendors. Notably, Malaysian Muslims love to travel to Japan due to its visa-free travel, the availability of various Muslim-friendly facilities, and its delicious street food. Street food is described as ready-to-eat food or drinks sold by hawkers or vendors in streets or any other public spaces (such as markets, fairs, or carnivals) for immediate consumption, including finger food and fast food. In general, people buy street foods because of factors such as convenience, reasonably-priced flavourful food, samples of ethnic cuisines, and nostalgia. Most importantly, street food reflects the local culture and appeals to many palates. Nowadays, savouring authentic local dishes of certain places has become a tourism trend. Moreover, statistics showed that millions of tourists have decided to revisit familiar locations to enjoy their local gastronomic culture. In fact, gastronomy is among the main factors that affect tourists’ destination choices. Based on current literature, this study theorised that gastronomy attractiveness (GA) and past gastronomy experience (GE) indirectly affects the repatronage intention (RI) through gastronomy satisfaction (GS). Furthermore, gastronomy knowledge (GK) and gastronomy motivation (GM) are direct predictors of RI. In this study, the analysed data showed significant relationships between GA, GE, and RI through GS and between GM and RI. However, GK and RI had an insignificant relationship.
Perceived Government Support as an Antecedent of Attitude and Perceived Behavioural Control (PBC) Effect on Agricultural Entrepreneurship (Agropreneurship) Intention Among the Youth in Sabah
Authors: Ambad Sylvia Nabila Azwa , Sumin Viduriati , Karia Abdul Aziz , Abdul Hakim Taufik , Albert Gisip Imelda
Published: December 2020

Agropreneurship refers to producing, processing, and selling various agricultural products. Essentially, the Sabah Agriculture Blueprint 2021-2030 aims to attract more public involvement, particularly among graduates in the agriculture and fisheries sector, while lessening such imported goods. The Sabahan youth could benefit from this blueprint. Despite this significance, youth participation in the agricultural industry remains low. Therefore, this study examined the effect of the perceived government support on the attitude towards agropreneurship and PBC. On top of that, this study investigated the effect of perceived government support, the attitude towards agropreneurship, PBC, and social norms (SN) on the agropreneurship intention of Sabahan youth. In this study, 353 Sabahan youth participated in the survey. The data were analysed using Partial Least Squares-Structural Equation Modelling (PLS-SEM) 3.2.9. The results revealed that all hypotheses were significant, except for social norms and agropreneurship intention. In sum, this study could contribute to formulating policies and relevant programmes, especially in increasing youth participation in agropreneurship.