bluuebunny/crossref_metadata_2025 huggingface dataset:
Analisis dan Perancangan Sistem Informasi Akuntansi Penjualan, Pembelian, Jasa Reparasi Motor, dan Persediaan Barang Dagang pada PT Daya Anugrah Mandiri
Authors: Carbini Sellawati , Juandy Yenita
Published: May 2020

Sistem informasi merupakan hal terpenting dalam suatu perusahaan karena dengan adanya sistem informasi maka perusahaan dapat menjalankan usahanya dengan lebih efektif dan efisien dimana pelayanan kepada pelanggan dapat dilakukan lebih cepat, pengolahan data lebih mudah dilakukan, cepat serta dapat meminimalisir kesalahan, penghematan sumber daya manusia, dan penyajian informasi dalam bentuk laporan dapat dilakukan tepat waktu dan akurat sehingga dapat dipergunakan dalam pengambilan keputusan.

Sistem Informasi Akuntansi merupakan bagian dari sistem informasi manajemen yang berfokus pada pengendalian internal untuk melindungi aktiva, data dan informasi yang dimiliki oleh perusahaan. Penulis melakukan analisis yang dituangkan dalam flowmap, merancang sistem baru yang digambarkan dalam Diagram Aliran Data (Data Flow Diagram) dan Diagram Keterhubungan Entitas (Entity Relationship Diagram).
PENGEMBANGAN INSTRUMEN PENILAIAN SIKAP SOSIAL BERBASIS PROYEK PADA PEMBELAJARAN FISIKA SMA
Authors: Sriyono Sriyono
Published: May 2020

Penelitian ini dilakukan untuk menghasilkan instrumen penilaian sikap sosial berbasis proyek pada pembelajaran fisika. Pengembangan instrumen sikap sosial dilakukan melalui delapan (8) langkah, yaitu: (1) menyusun spesifikasi instrumen; (2) telaah instrumen; (3) melakukan uji coba terbatas; (4) menganalisis instrumen (5) memperbaiki instrumen; (6) melakukan ujicoba luas; (7) Menafsirkan hasil; (8) instrumen final. Subjek penelitian yang digunakan adalah 112 siswa kelas X SMA, yang terdiri dari 45 siswa laki-laki dan 65 siswa perempuan. Pengumpulan data dilakukan dengan menggunakan lembar validasi ahli. dan angket. Validasi isi dilakukan oleh 3 expert judgment dengan  Agreement Index 0,830.  Hasil analisis factor menunjukan bahwa dari 34 item mengelompok menjadi 7 faktor yaitu: 1) perilaku jujur, 2) disiplin, 3) tanggung jawab, 4) toleransi, 5) gotong-royong, 6) santun dan 7) percaya diri, dengan reliabilitas Alpha Cronbach 0,919.
Chronic Cough
Authors: Chakravorty Triya , Chakravorty Indranil
Published: May 2020

Cough is a common manifestation of many respiratory conditions and mostly is non-specific on its own as a symptom of the underlying disease. Most transient coughing episodes tend to settle within 2-3 weeks. Yet cough can herald more sinister disease such as malignancy or progressive respiratory conditions. In epidemiological surveys, cough persisting more than 8 weeks has been shown to have a significant impact on the quality of life and is often difficult to diagnose and treat, taking weeks to months. There is consensus that a logical, evidence-based, standardised approach is most likely to lead to an efficient diagnosis and provide the highest chance of effective resolution. This paper describes the current evidence and offers a best practice approach for primary care practitioners and general internists.
Vegetation classification goes open access
Authors: Jansen Florian , Biurrun Idoia , Dengler Jürgen , Willner Wolfgang
Published: May 2020

With this inaugural editorial, we introduce Vegetation Classification and Survey (VCS), the new gold open access (OA) journal of the International Association for Vegetation Science (IAVS). VCS is devoted to vegetation classification at any spatial and organisational scale and irrespective of the methodological approach. It welcomes equally case studies and broad-scale syntheses as well as conceptual and methodological papers. Two Permanent Collections deal with ecoinformatics (including the standardised Database Reports published in collaboration with GIVD, the Global Index of Vegetation-Plot Databases) and phytosociological nomenclature (edited in collaboration with the respective IAVS Working Group). We discuss the advantages of OA as well as challenges and drawbacks caused by the way it is currently implemented, namely “pay for flaws” and publication impediments for scientists without access to funding. Being a society-owned journal, editorial decisions in VCS are free from economic considerations, while at the same time IAVS offers significant reductions to article processing charges (APCs) for authors with financial constraints. However, it is recognised that sustainable OA publishing will require that payment systems are changed from author-paid APCs to contracts between the science funding agencies and publishers or learned societies, to cover the production costs of journals that meet both quality and impact criteria.

Abbreviations: APC = article processing charge, GIVD = Global Index of Vegetation-Plot Databases, IAVS = International Association for Vegetation Science, JVS = Journal of Vegetation Science, OA = open access, VCS = Vegetation Classification and Survey.
Current Trends on the Acquisition, Virtual Representation, and Interaction of Cultural Heritage
Authors: Portalés Cristina , Casas Sergio , Vera Lucía , Sevilla Javier
Published: May 2020

Cultural heritage (CH) tells us about our roots, and therefore, constitutes a rich value for the society. Its conservation, dissemination, and understanding are of utmost importance. In order to preserve CH for the upcoming generations, it needs to be documented, a process that nowadays is done digitally. Current trends involve a set of technologies (cameras, scanners, etc.) for the shape and radiometric acquisition of assets. Also, intangible CH can be digitally documented in a variety of forms. Having such assets virtualized, a proper dissemination channel is of relevance, and recently, new technologies that make use of interaction paradigms have emerged. Among them, in this chapter, the authors focus their attention in the technologies of virtual reality (VR), augmented reality (AR), and serious games (SGs). They aim to explore these technologies in order to show their benefits in the dissemination and understanding of CH. Though the work involving them is not trivial, and usually a multidisciplinary team is required, the benefits for CH make them worth it.
Ageing and Health in the Digital Society
Authors: Bobrowicz-Campos Elzbieta , Matos Armanda P. M.
Published: May 2020

This chapter describes the innovative solutions generated by the digital society in the field of health and reflects on the effectiveness of the mechanisms implemented in the last decade to increase the adoption of these solutions by the aged population. This reflection begins with the analysis of the digital divide-related issues, relying on the assumption that the lack of a joint multi-stakeholder effort to reduce existing differences in access to digital resources may result in deepening inequality in health. The opportunities and risks for ageing and health in the digital era are presented considering different healthcare purposes, contexts, and end-users' perspectives. Finally, the recommendations to maximize the impact of strategic actions to increase digital literacy and to reinforce digital engagement are presented.
Technology to Improve Elderly Nutrition
Authors: Rivero Jiménez Borja , Conde Caballero David , Muñoz González Beatriz , Mariano Juarez Lorenzo
Published: May 2020

The ageing of the population is one of the main emerging problems for this century. Knowledge and understanding of the food ideologies and practices of this adult population is a vital issue in health policies and interventions. With the traditional tools and assumptions of ethnographic fieldwork, the research is oriented towards a series of objectives in order to complete the limited knowledge on these issues. Through some of the categories that emerge from the fieldwork, the authors analyze the ideology, practices, and representations on food in the adult population and try to propose some spaces from where technology can work on solutions.
Interconnecting IoT Devices to Improve the QoL of Elderly People
Authors: Flores-Martin Daniel , Pérez-Vereda Alejandro , Berrocal Javier , Canal Carlos , Murillo Juan M.
Published: May 2020

The rate at which the internet is growing is unstoppable due to the large number of connected smart devices. Manufacturers often develop specific protocols for their own devices that do not usually follow any standards. This hinders the interconnection and coordination of devices from different manufacturers, limiting the number of daily activities that can be supported. Some works are proposing different techniques to reduce this barrier and avoid the vendor lock-in issue. Nevertheless, this interconnection should also depend on the context. In this chapter, the authors propose a system to dynamically identify the interconnections required each specific situation depending on the context. This proposal has been tested in case studies focused on elderly people with the aim of automating their daily tasks and improving their quality of life. Further, in a world with an accelerated population aging, there is an increasing interest on developing solutions for the elderly living assistance through IoT systems.
Augmentative and Alternative Communication Systems for Children With Cerebral Palsy
Authors: Yashomathi  , Krishnan Gayathri
Published: May 2020

Cerebral palsy (CP) is a congenital neurological disorder of movement, muscle tone, or posture. Children with CP may also have associated sensory and motor disorders such as visual impairment, hearing loss, intellectual disability, speech-language and communication disorders, as well as swallowing-related problems. They often require long-term treatment and rehabilitation from various disciplines such as speech-language therapy, augmentative and alternative communication (AAC) therapy, physiotherapy, occupational therapy, along with medical/surgical line of treatment. Augmentative and alternative communication (AAC) therapy approaches focus on providing the individual with communication methods using residual functional abilities. This chapter aims at briefing the reader on the principles, methods, and key features of AAC communication systems such as switches, pointing devices, visual displays, virtual and modified keyboards, AAC devices with digitized speech output, AAC apps and software, eye gaze systems, etc.
Aided Augmentative and Alternative Communication (AAC) Systems for Individuals With Autism Spectrum Disorders
Authors: Yashomathi
Published: May 2020

Autism spectrum disorders (ASDs) are complex neuro-developmental disorders. They demonstrate pervasive deficits in social communication, restricted and repetitive behaviors, cognitive impairments, etc. Most often individuals with ASDs are often considered “non-verbal” and they require comprehensive intervention to improve their functional communication skills. Augmentative and alternative communication (AAC) was always viewed as a “last resort” for people with complex communication needs when all other interventions failed to achieve the potential benefit. However, with growing evidence, AAC has been implemented even in children with communication difficulties to augment spoken language development. Thus, this chapter aims to discuss the characteristics of ASD, to describe the need for AAC intervention in children with ASD, challenges and practices of AAC in ASD, to review implementation of aided AAC systems for children with ASD in different contexts, to indicate the gaps and future prospective in AAC intervention for people with ASDs.
Support of Gamification, Virtual, and Assistive Technologies in Intervening in Social and Behavioral Impairment
Authors: Rajpurohit Hiten , Khosla Arun
Published: May 2020

Neurodevelopmental disorders (NDDs) compromise the development and attainment of full social and economic potential of an individual. Technological intervention can play a big role and is capable of reducing the cost of present medical intervention. Games based on daily life activities can play big roles in improving social skills. One can easily customize games as per requirement or as specific to particular social skills for children to improve their respective social skills. Children find it easy to associate with these games since these games involve scenes related to their daily routine and don't involve any complex set of rules to be followed. Even parents, family members, and teachers can also help in playing these games at an initial level without any need for specialization or special training.
Yoga Therapy on Cognitive Function in Neurodevelopmental Disorders
Authors: Soccalingam Artchoudane , Ramanathan Meena , Bhavanani Ananda Balayogi
Published: May 2020

Neurodevelopmental disorders (NDDs) are birth imperfections that cause dysfunction in cognitive and sensory processes and impairment in motor function, communication, and behavior. The major factors responsible for increasing incidence of NDDs are genetic, psychosocial, and excessive use of drugs. Yoga alleviates neurological problems and NDDs. Asana is a physical movement with breath awareness that facilitates the development of body awareness, concentration, and memory and provides vital energy for children with neurodevelopmental disability. Yoga therapy improves sensory coordination and motor imitations that enable persons with cognitive disabilities to make meaningful response by the integration of senses and functions of central nervous system.
Comparative Study on ASD Identification Using Machine and Deep Learning
Authors: Kaur Rajandeep , Rani Rajneesh
Published: May 2020

Autism spectrum disorder (ASD) is a neurodevelopment disorder that consists of a lack of social interaction and repetitive behavior of a person. It must be diagnosed at an early stage; otherwise it may adversely affect the life of that person. However, ASD consists of numerous overlapping neurodevelopment disorders such as autism and schizophrenia, which share some common brain structures. The medical image analysis is very popular to identify and segment different diseases in healthcare. In recent years, due to the tremendous changes in imaging devices, neuroimaging has recorded a great increase in identifying neuropsychiatric disorders. Moreover, MRI (magnetic resonance imaging) is a powerful non-invasive medical imaging to distinguish between these overlapping diseases by extracting brain connectivity. The researchers have applied numerous algorithms to understand common and distinctive brain connectivity features for these disorders. This chapter will focus on state-of-the-art techniques based on machine and deep learning with their comparative analysis and challenges of ASD.
If You Want to Trigger an Emotional Purchase, Don't Make Your Customers Think
Authors: Margalit Liraz
Published: May 2020

The classic economic theory describes consumers as rational economic actors that select an alternative only after considering all the relevant information. However, while the logical process is certainly a key factor in considered purchases such as insurance or financial products, it is actually detrimental to the retail-consumer industry, where emotional decision making or the impulse purchase plays a central role. Although we like to think of ourselves as rational creatures, absorbing information, weighing it carefully, and making thoughtful decisions, many of our most crucial choices are made by what we call hunches, gut feelings and a somewhat automatic reaction that is beyond or beneath consciousness. We like to refer to this feeling as intuition (“I have a very good feeling about this house”), but the reality is that this “intuition” is an established part of emotion-based learning. This chapter deals with the significant role of emotions in everyday purchase decisions.
“Consumption” of Past to Define Ethnic Identity in Real Time and Space
Authors: Okrostsvaridze Nino , Bzhalava Elisabed
Published: May 2020

This research examines the strength of the Turkish Georgians ethnic identity in Turkey and Germany, issues of socialization with German society, and perception of “home” and “consumption” of the past to define ethnic identity. Consumption is not only a way of behaving, but it is also part of a way of life, which is defined by ethnic and religious identity, which itself defines consumer behaviour. A perception of self-identification, linkage with forefathers, and a search for a long-lost past are particularly necessary in foreign countries, and different reminders regarding the past and origin are considered to be the best means. Consumption of “past” and (re)construction of memories form a tight-knit ethnic unit in a foreign country, and institutionalization of own culture is so strong that many of the ethnic participants feel as if they were living in their own country. Ethnic “retailers” (communities, membership groups) provide the “emotional glue” that sticks ethnic participants together giving them a sense of identity.
Decision Making as a Socio-Cognitive Process
Authors: Borges Monique , Marques João Lourenço , Castro Eduardo Anselmo
Published: May 2020

Researchers from multidisciplinary scientific fields have been puzzled by human behaviour in dynamic and complex decision-making contexts. Since the seventeenth century, several theoretical, conceptual, and empirical contributions have emerged. These contributions evidence the need to critically assess the rational foundations of decision theories, stemming from the cognitive basis for human heuristics and bias. This chapter focuses on how socio-cognitive theories have been introduced as analytic tools to explain individual and collective behaviours, decision rules, and cognitive mechanisms. In particular, the authors advance some arguments explaining its importance and the underlying challenges of social representations as part of the decision-making process. They propose a methodological script that stresses the social representations approach and encounters more functional and operational settings.
Neuromarketing as an Environmental Awareness Tool
Authors: de Quevedo Alexandre Silva , Quevedo Daniela Müller , Figueiró Paola Schmitt , Fernandes Elissa Kerli
Published: May 2020

One of the greatest concerns of the last century is that human activities can extinguish the living conditions on the planet. In order for the technological and business advancement to be rational and environmentally sustainable in all areas of human knowledge, changes in paradigms must be made. To understand where these habits/paradigms originate from, how they are established, and how they can be altered, the field of neuroscience may be an excellent ally. Neuromarketing is a branch of neuroscience research still under development, using technologies already applied in neuroscience to product marketing. Therefore, the present study aims to conceptualize neuromarketing as a possible tool for sustainable consumption. In summary, this chapter presents a critical review of the main studies conducted by researchers in the last decade related to the theme of sustainable consumption associated with neuromarketing. The present findings may help to identify priority areas related to conscious consumption and neuromarketing.
The Neuromarketing Revolution
Authors: Moses Elissa , Clark Kimberly Rose
Published: May 2020

This chapter examines the advent of the neuromarketing revolution, which over the past 10 years changed the way market research is conducted worldwide to include nonconscious measures in everyday studies. It required a form of technology transformation as traditional researchers and marketers came to accept that nonconscious response and emotion are critical in driving brand perceptions and behaviors. Moreover, it demanded a steep learning curve for understanding and adopting new types of scientifically driven methodologies such as EEG and Biometrics. Now with experience and extensive research by academics and practitioners, neurometrics are considered of high value for understanding consumer response and of great potential value for improving prediction leveraging AI and machine learning.
Linguodidactic Analysis of Professionally-Oriented Language Education and CLIL Special Features
Authors: Khalyapina Liudmila , Almazova Nadezhda , Baranova Tatiana
Published: May 2020

The chapter provides a consistent analysis of two approaches to teaching foreign languages in the system of professional education: the concept of professionally oriented education in Russia and the concept of ESP in the European science. The chapter presents a comparative analysis of CLIL theoretical fundamentals, which were developed by a group of European researchers and professionally-oriented language learning popular, which is still widely spread in the system of higher education in Russia. Nowadays CLIL is becoming popular in Russia too, and in some educational establishments, it is broadly applied. But at the same time, educators are still confused in differentiating these two approaches. The chapter considers common differences between the two approaches in terms of comparing methodological principles, regulatory requirements in organizing education, teaching techniques; it analyzes and systematizes methodological errors committed by teachers when shifting to curriculum integration learning.
On Integrative Bilingual Teaching of a Foreign Language and Engineering at a Technical University
Authors: Krylov Eduard
Published: May 2020

Integrative bilingual teaching/learning of foreign language and engineering disciplines at a technical university provides a good opportunity for students of the personal growth both in cognitive and communicative aspects, which contributes to their better positions in the labor market. To put this opportunity into practice, the educators should have clear ideas about the goal of this educational process, psychological aspects accompanying the process, conditions of its implementation, basic units of teaching/learning, means of monitoring, assessment, and control and some others. All these components of methodology are discussed in this chapter.
CLIL Pedagogy
Authors: Sidorenko Tatiana , Rybushkina Svetlana
Published: May 2020

The chapter presents an overview of the content and language-integrated learning (CLIL) experience of Tomsk Polytechnic University as an illustration of the general discussion of CLIL methodology. CLIL-based courses are analyzed against the criteria of their place in the educational programs, teaching objectives, and organization. The chapter further aims to introduce and discuss requirements for students' language proficiency, the use of students' native language, lesson pace, and other factors that can affect students' engagement and the level of achieving learning outcomes. Theoretical insight into CLIL benefits and drawbacks and a practical study of TPU cases provides guidance for further empirical research and can build on the conceptual framework of nation-based CLIL practice. The framework informs qualitative research in disentangling causes and effects and has the potential to stimulate practical changes in CLIL didactics that are adequate for the context conditions of the Russian higher education area.
Student-Led Online Discussions
Authors: Lai Alice
Published: May 2020

Digital gender inequality is well alive in online classrooms in U.S. higher education. The present study aimed to investigate this persistent issue and proposed a feminist pedagogy-inspired, student-led online discussion activity as a means to mitigate digital gender inequality. Specifically, the purpose of this chapter is threefold: (1) to expose and unravel the issue of digital gender disparity and inequality with a particular focus on its relevance to the online discussions, (2) to contextualize the feminist pedagogy within the postmodern technoculture and analyze its potential to sustain gender-equitable and empowered online education, and (3) to exemplify the feminist pedagogy through a student-led discussion activity implemented in an online undergraduate art history course. Reflecting on qualitative and learning survey data, this chapter is concluded with a diagnosis of the students' perceptions of the positive, challenging, and transformative aspects of the student-led discussion.
The Sub-National International Cooperation in the Relationship Between Argentina and China
Authors: Carcedo Facundo
Published: May 2020

The chapter outlines the theoretical approach used in this research. Based on the relationship between China and Argentina, the chapter proposes a study of the links at the sub-national level between both states, specifically the ties between the Buenos Aires Province with Chinese counterparts, the municipality of Bahia Blanca with Dalian, and the municipality of General Pueyrredón with Tianjin, which is constituted as an innovator subject in the bilateral relationship and where a lack of recent research has been found. Conclusions will be presented to demonstrate the huge potential to increase the economic, political, cultural, educational, and commercial ties at the subnational level between Argentina and China provinces and local governments and to analyze from the IR discipline the participation of the Asian country in the Argentine sub-national international politics.
Study and Survey on Blockchain Privacy and Security Issues
Authors: Banerjee Sourav , Das Debashis , Biswas Manju , Biswas Utpal
Published: May 2020

Blockchain-based technology is becoming increasingly popular and is now used to solve a wide range of tasks. And it's not all about cryptocurrencies. Even though it's based on secure technology, a blockchain needs protection as well. The risks of exploits, targeted attacks, or unauthorized access can be mitigated by the instant incident response and system recovery. Blockchain technology relies on a ledger to keep track of all financial transactions. Ordinarily, this kind of master ledger would be a glaring point of vulnerability. Another tenet of security is the chain itself. Configuration flaws, as well as insecure data storage and transfers, may cause leaks of sensitive information. This is even more dangerous when there are centralized components within the platform. In this chapter, the authors will demonstrate where the disadvantages of security and privacy in blockchain are currently and discuss how blockchain technology can improve these disadvantages and outlines the requirements for future solution.
Developing Use Cases of Blockchain Technology
Authors: Yeboah-Boateng Ezer Osei , Nwolley, Jnr. Stephane
Published: May 2020

Technology innovation creates value and competitive advantage. Blockchain has been used to resolve existing problems and offer efficient operations. Blockchain is applied in education, healthcare, automation, etc. Blockchain with permanence and reliability attributes has created trust in digital assets with high integrity and availability to leverage on innovative transactions. Indeed, a plethora of blockchain use cases and value propositions are documented. That notwithstanding, there is dearth of literature on transforming some legacy systems and creating value. To harness the potential, a deeper understanding of use cases and future opportunities is imperative. So, how can blockchain be harnessed for best value creation? What strategies could be adopted by SMEs to leverage? The study explicated on taxonomy of use cases in taxation, e-voting, AI and IoT, and analyzed some value creation perspectives to identify opportunities, in particular, smart contracts used to enforce regulatory compliance. It implies that blockchain use cases could create future opportunities for SMEs.
Best Practices for Teaching ESL in Higher Education
Authors: Christiansen Bryan
Published: May 2020

This chapter examines three realities in the typical higher education English as a second language (ESL) classroom in non-English speaking countries and how they can be resolved to enhance student learning and teaching performance by native- and non-native English-speaking instructors alike. The British Council in 2018 estimated approximately 1.7 billion people were learning and using the English language worldwide in 2015, and the number is only expected to grow in the coming years. Therefore, the importance of this chapter in examining best ESL teaching practices should be obvious. The chapter is based on the author's extensive ESL background in seven nations since 1982 at higher education institutions as well as an integrated literature review related to the practice of teaching ESL.
The Influence of Heat Treatment on the Quality of Vehicle Component Parts Made of Rigid Polyurethane Foam
Authors: Shakirova Gulgena D. , Romanova N.V. , Shafigullin Lenar N.
Published: May 2020

The paper provides the results of the investigation in the influence of heat treatment on the quality of vehicle component parts made of rigid polyurethane integral foam. The temperature of heat treatment was based on the exo-peak of the first heat cycle in DSC curve, and was equal to 135 °С. At that temperature, the samples were treated for 2-8 hours, and, as a result, they experienced an abnormal exo-effect in the glass transition region, which was indicative of thermal relaxation. The paper shows that the additional heat treatment stage for parts made of rigid polyurethane integral foam results in an increase in molecular mass of polymer, due to a smaller quantity of end groups, and, thus, in an increase in glass transition temperature from 169 °С to 176 °С. An increase in heat treatment time to 6 hours at 135 °С leads to a higher ultimate bending strength, which reaches its maximum, while further heat treatment (up to 8 hours) lowers this value. Therefore, with a higher degree of cross-linking the fracture toughness increases and passes its maximum, after that it starts to decrease, and the material becomes brittle.
The Microstructural Peculiarities of Beryllium Bronze after Heat Treatment
Authors: Baraz V.R. , Estemirova S.X. , Ishina Elena A.
Published: May 2020

In this article, the microstructural peculiarities and properties of dispersion-hardened beryllium bronze with Ni and Ti are studied after quenching (780 °C) in a supersaturated solid solution and aging (320 °C, 3h). Decomposition of the α-solid solution matrix is implemented by means of an intermittent reaction with a primary allocation intermetallic χ-phase (type Be12Ti) with a VCT-lattice. It is shown that the strength properties (yield strength, micro-hardness) of the alloy more than double after aging.
A Study of Porosity of Products Sintered from BrS30 Alloy Electro-Erosion Powders
Authors: Ageev Evgeniy V. , Pereverzev Anton S. , Khardikov Sergey V.
Published: May 2020

The article discusses a topical issue of scrap metal recycling, in particular BrS30 alloy scrap recycling, into powders for their repeated use to fabricate and harden machine parts. Nowadays, one of the most promising method of processing any conductive material is electro-erosion dispersion, which is non-waste, eco-friendly and energy-efficient. The paper presents the findings of a research of porosity of products, sintered from leaded bronze pressed powders, obtained by electro-erosion dispersion in distilled water. It was determined that in uniaxial pressing of the powder using a desktop hydraulic press, and in isostatic pressing of the powder using an isostatic press, and further sintering of the obtained samples in a folding tube furnace, the porosity was 0.61% and 1.44%, respectively.
The Research and Simulation (Modelling) of the Destruction of a Single Abrasive Particle during Waterjet Cutting
Authors: Barsukov Gennady V. , Zhuravleva Tatiana A. , Kozhus Olga G.
Published: May 2020

The article presents the results of experimental studies of differences in the nature of impact destruction of single garnet grains penetrating the target material, and presents the results of numerical simulation (modeling) of the contact interaction of an abrasive particle with a flat obstacle, which allowed determining the volume ablation of the material under the action of a single abrasive particle, and makes it possible to predict the performance of waterjet cutting.
Study of the Adhesion Strength of the Coating with Different Coating Methods to the Surface of Parts of «Shaft» Type
Authors: Rodichev Alexey Yu. , Gorin Andrey V. , Tokmakova Maria A.
Published: May 2020

The article deals with the strength of adhesion of coatings with the parts of type «shaft». In accordance with the above separation, gas-thermal methods of spraying and thermal power sintering have an adhesive interaction of particles and coatings. The use of thermomechanical treatment of preformed coatings (applied by thermal spraying) makes it possible to increase the adhesion strength of coatings with parts of «shaft» type. For a quantitative assessment of the adhesion strength of coatings with the base metal, a shear coating method was used. An experiment to determine the adhesion strength of samples of steel with various applied coatings is considered. It was concluded that the adhesion strength of the coatings obtained using the hydrogen-propane mixture was slightly superior.
Effect of Chemical Composition of Glassy Phase of Porcelain Stoneware on Product Brittleness
Authors: Pavlova Irina A. , Kiyko A.S. , Farafontova Elena P.
Published: May 2020

During the operation of porcelain stoneware sometimes there is a type of defects associated with crumbling from the edge of tile. In addition, cracks occur when a small object is fallen and during transportation of the products. Compared to conventional ceramic floor tiles, porcelain stoneware has increased strength, which explains its high price. The brittle failure is most likely, due to the hardening of glassy phase of tiles during cooling stage of the firing process. As a rule, the quenching temperature depends on the chemical composition of the glassy phase formed during firing. Both the phase and chemical composition of porcelain stoneware, and the chemical composition of the glassy phase are determined.
Effect of the Lattice Parameter on Brittle Fracture of Metals at Low Temperatures
Authors: Khlybov Alexander A. , Kabaldin Yury G. , Anosov Maksim S.
Published: May 2020

The paper presents the results of tests of metallic materials at low temperatures. It is shown that with the decreasing of temperature, the mechanical characteristics of materials change significantly: strength limits, yield strength increase, and relative elongation decrease. It is shown that the temperature of the brittle-viscous transition depends on the lattice parameter of the materials. The higher the lattice parameter is, the lower is the temperature of the brittle-viscous transition. It is shown that the lattice parameter can be used to estimate the temperature of the brittle-viscous transition
The Creation of Multicomponent Octahedral Crystals with Spinel Structure Using Solid-Phase Synthesis in the Al2O3-BaO-CuO-Fe2O3-Mn2O3-NiO-SrO-TiO2- ZnO and Al2O3-BaO-CuO-Fe2O3-NiO-SrO-TiO2-WO3- ZnO Systems
Authors: Zaitseva O.V. , Zhivulin Vladimir E. , Zhivulin D.E.
Published: May 2020

This paper presents the results of an experimental study of the possibility of high-entropy oxide phases creation using the of solid-phase synthesis method in the Al2O3–BaO–CuO–Fe2O3–Mn2O3–NiO–SrO–TiO2–ZnO and Al2O3–BaO–CuO–Fe2O3–NiO–SrO–TiO2–WO3–ZnO systems. As a result of the study, a microcrystalline octahedral multicomponent phase was found in the crystallized sample. Judging by the composition, this phase has a spinel structure and is characterized (judging by the components concentrations and its ratio) by rather high values of the mixing configurational entropy. It is shown that barium, strontium and tungsten are not included in this phase in appreciable amounts. The obtained results indicate the possibility of synthesizing high-entropic spinels using these Al2O3–CuO–Fe2O3–Mn2O3–NiO–TiO2–ZnO systems.
Prediction of Fracture Toughness of Steels According to the Microstructure and Chemical Composition
Authors: Bakhracheva Yulia
Published: May 2020

The influence of microstructure parameters and chemical composition on the fracture toughness of steel is investigated. It is shown that the crack resistance of steel can not be reliably estimated only by a single parameter of the microstructure or only by chemical composition. A generalized parameter of microstructure and chemical composition, which correlates well with crack resistance, is proposed.
RETRACTED: Studies of the Electrodynamic Parameters of a Powdered Material Depending on the Fractional Composition in the Frequency Range of 8-12 Ghz
Authors: Klygach D.S. , Vakhitov M.G. , Zhivulin Vladimir E.
Published: May 2020

This article describes a method for measuring the dielectric constant and magnetic permeability of alumina powder (corundum) in the frequency range of 8-12 GHz. The results of studies of permeability and permittivity using a segment of a coaxial transmission line depending on the size of corundum particles are presented.
Objective Laws of Nitrogen Removal in the Vacuum Tank Degasser
Authors: Tutarova Vlasta D. , Shapovalov Aleksey N. , Kalitaev Alexander N.
Published: May 2020

This article discusses the problems of efficient removal of nitrogen in the vacuum tank degasser operating at the electric arc furnace shop of Uralskaya Stal (Ural Steel) OJSC in the course of manufacturing of high-quality low carbon steel grades by means of steel grades «2» and «T». In order to determine the reasonable and balanced treatment parameters that ensure the required level of nitrogen content in the above steel grades, an analysis of production data for the period of November-December 2016 has been carried out. This analysis is the basis for identifying the vacuum degassing parameters in compliance with the technological capabilities and well-balanced levels, which allow predicting the level of nitrogen content in steel. To assess the cumulative quantitative effect of the main parameters of vacuum degassing on nitrogen removal, there has been performed a regression analysis. As a result, there have been obtained multiple regression equations describing a rational combination of steel treatment parameters for achieving the required nitrogen removal level.
Non-Metallic Impurities in Continuous Cast Billets
Authors: Stolyarov A.M. , Potapova M.V. , Potapov Michail G.
Published: May 2020

Non-metallic impurities in continuous cast billets are evaluated by a growth rate of edge point impurities. The first part of our research was devoted to a relationship between the growth rate of edge point impurities and other macrostructure defects. A correlation-regression analysis of steel macrostructure quality showed the relationship between the rate of edge point impurities and segregation cracks in general, as well as corner streaks. The second part of our research indicated that impurities in billets from conventional carbon steel were crucially influenced by a method of pouring steel from a tundish into a mould. By transferring from open stream casting to shrouded casting, the quantity of non-metallic impurities in billets decreases by 7 times. In case of open stream casting, prevailing inclusions are oxides resulting from secondary oxidation, while the growth rate of edge point impurities in billets increases with an increased content of sulphur and phosphorus in steel, and decreases with an increased manganese/sulphur ratio. In case of shrouded casting, non-metallic impurities are limited to casting temperature and speed: steel overheating in the tundish above the liquidus temperature and withdrawal speed of billets. Less non-metallic impurities in case of the shrouded casting are contributed by steel overheating in the tundish above the liquidus temperature over 30oС and withdrawal speed, not exceeding 2.5 m/min.
Silver-Containing Concentrate Processing
Authors: Nikanorov A. V.
Published: May 2020

The goal of the research was to melt the silver-containing concentrate from the Dukatsk deposit (Magadansk region) in a reverberatory furnace. Preparatory research has established that internal collector smelting is an effective way to recover precious metals from the flotation concentrate of the Dukatsk deposit. This method is based on the property of lead and copper in the concentrate in an amount comparable to that of silver, to collect precious metals in a metal or matte phase in the process of segregation smelting. Recovery of silver in a high-grade alloy in one technological operation corresponds to the planned performance (silver recovery into an alloy of 93.0%) in processing flotation concentrates at non-ferrous industry plants.
Thermal Properties of High-Magnesia Oxidized Nickel Ore
Authors: Selivanov E.N. , Sergeeva Svetlana V. , Gulyaeva R.I.
Published: May 2020

The content of elements in the main mineral components of the ore, such as serpentine, talc, and chlorites, were determined. It was shown that, during heat treatment of the ore, in addition to the decomposition of hydrates and carbonates, serpentine decomposes and new phases (forsterite and enstatite) form. On the bases of analysis of the properties of the ore, patterns of phase transitions during heated in inert and reducing atmosphere were identified. It was found that the coal-thermal reduction of nickel and iron from oxides begins at temperatures above 800 °C, and from serpentines begins at temperatures above 1250 °C. It was found that, when heating the ore above 1200 °C in a mixture with a reducing agent, the metals reduce and form iron-nickel alloy. During electro-thermal smelting, the mode of which was determined by the melting points of slag (SiO2– MgO – FeO – CaO – Al2O3system) and ferronickel, the ratio of Ni / Fe in the metallic phase was determined by the consumption of reducing agent (coal, coke).
A Study of Nickel and Iron Reduction Silicothermic Process by Thermodynamic Simulation
Authors: Salina V.A. , Zhuchkov Vladimir I. , Zayakin Oleg V.
Published: May 2020

The results of studying the effect of silicon concentration of ferrosilicon: FeSi5 (5% Si), FeSi20 (20% Si), FeSi35 (35% Si), FeSi50 (50% Si), FeSi65 (65% Si) on the degree of nickel (ηNi) and iron (ηFe) reduction of the CaO-SiO2-MgO-Al2O3-FeO-NiO-P2O5 multicomponent oxide system at a temperature of 1500 °C by thermodynamic simulation are given2. The HSC Chemistry 6.12 software package developed by Outokumpu (Finland) was used for the simulation. The chemical compounds Ni3Si and Ni5Si2 with the corresponding thermodynamic characteristics are entered into the database. The calculations were performed by the “Equilibrium Compositions” subroutine at a gas pressure of 1 atm, containing 2.24 m3 N2, as a neutral additive. The obtained modeling results indicate the thermodynamic possibility of nickel and iron reduction from the CaO-SiO2-MgO-Al2O3-FeO-NiO-P2O5 oxide system by silicon of ferrosilicon. The degree of iron reduction increases from 88.8 to 91.4%, with an increase in the silicon concentration of ferrosilicon [Si]FeSi from 5 to 65%. The degree of nickel reduction with an increase in the silicon concentration of ferrosilicon remains almost unchanged and amounts to 99.8-99.7%. The degree of use of silicon is 92.1–94.5%. The chemical composition of the complex alloy – ferrosiliconickel is determined. The obtained simulation results can be used to develop the technology for producing ferrosiliconickel from nickel ore by silicothermic method.
Assessment of Mold Filling Rate Influence on Amount of Oxide Films in Castings by Numerical Simulation
Authors: Zarubina O.A. , Korotchenko A.Yu. , Zarubin A.M.
Published: May 2020

The influence of the mold filling rate on the content of oxide films in aluminum alloy castings is considered. The existing methods for estimating the probability of formation and entrainment of oxide films in the bulk of the liquid, which are associated with surface disturbances during the melt flow through the channels of the mold, are analyzed. A criterion for estimating oxide impurities in the melt using numerical process modeling is proposed. A comparative analysis of the results of numerical simulation with the data of practical experiments obtained by M. V. Sharov and N. M. Galdin was performed. This comparative analysis and experience in the development of technological processes for shaped castings showed the possibility of using the criterion in numerical modeling.
Improvement of Process Parameters Calculation for Coil Rolling at the Steckel Mill
Authors: Kurpe Oleksandr H. , Kukhar Volodymyr V. , Klimov Eduard S. , Chernenko Serhii M.
Published: May 2020

The mathematical model of hot-rolled coil rolling at the Steckel mill (Ferriera Valsider SpA) has been thoroughly investigated in the paper. There has been made a verification of the developed model to use it for the rolling technology design. The influence of the stand stiffness has also been taken into account. When simulating rolling temperature conditions, an average error was within the range from 8.27 to 9.11% at the mill 3170 and from 0.003% to-0.92% at the mill 1780. When simulating rolling force, an average error was within the range from 0.5% to 5.7% at the mill 3170 and from-4.89 to 6.59% at the mill 1780. The equation has been obtained, and the comparison of calculated stands stiffness has been made at the mill 3170 and 1780.There has been determined influence on the actual measurement of the pre-treatment temperature for the feed processing by descaler, which results in significant errors compared to the calculation results.
The Properties of Steel 42HMFA after Hardening and Toughening
Authors: Astashchenko V.I. , Shveyova T.V. , Shveyov A.I.
Published: May 2020

The properties of steel 42HMFA, which has been tempered in various environments at thermal improvement, are investigated. Advantages of application to training of water solutions of polymers are shown. Training in synthetic environments provides higher rates of mechanical properties of steel products. As a result of training in water solutions of polymer, the maximum level of hardenability on the section of product and fatigue strength of detail is reached.
Residual Stresses of Round Steel Rod at Elastoplastic Twisting
Authors: Shinkin Vladimir N.
Published: May 2020

In the elastoplastic twisting of a rod under the action of an external torque, the cross-section of the rod is divided into two zones: the inner elastic zone and the outer plastic zone. After removing the external loads, we observe the residual deformations and the residual stresses inside the rod that significantly affect on the subsequent mechanical processes at manufacturing the products from the round rod. Under too much twisting, the longitudinal surface fibers of the rod begin to tear, the outer surface of the rod ceases to be cylindrical, and the rod’s cross-section ceases to be flat (the Bernoulli’s hypothesis about the flat sections is violated). Next a rupture of the rod is followed. For the plastic materials, the destruction is caused by the pure shear, and the rupture surface is perpendicular to the axis of the rod. For the brittle materials, the destruction occurs, due to the rupture along the screw surface inclined to the axis of the round rod at the angle of 45. In this paper, the residual stresses of the round rod at twisting are obtained for an elastoplastic medium with linear hardening in depending on the rod’s diameter, the shear modulus, the hardening modulus in shear and the yield strength in shear of the rod’s material.
Role of Surface Roughness in the Interlayer Boundary Formation during Manufacturing of Clad Metal Composites
Authors: Salikhyanov Denis Rinatovich
Published: May 2020

In the present research work, the role of surface roughness in the interlayer boundary formation during manufacturing of clad metal composites was analyzed. Process of interlayer boundary formation was described through mathematical and computer simulation. The importance of taking into account not only arithmetical mean roughness Raor ten-point mean roughness Rz, but also Rz/S ratio (where S – mean spacing of adjacent peaks) is shown, because this relation affects the length of actual contact between dissimilar materials. As the result of mathematical and computer simulation, dependence of the length of actual contact between dissimilar materials on Rz/S ratio and semi-angle of the ridge vertex was obtained.