bluuebunny/crossref_metadata_2025 huggingface dataset:
Advancing Community-Engaged Teacher Education Through Narrative, Poetry, and Performance
Authors: Zimmerman Aaron Samuel
Published: February 2022

Learning to become a democratic educator requires listening to and learning from the perspectives, values, goals, and concerns of local communities. Obtaining and learning from this knowledge, however, is not without its challenges. This article will present an overview of community-engaged teacher education as well as some of the challenges inherent to this endeavor. This article will then present an argument for how three particular methodologies of arts-based research (narrative, poetry, and performance) may be effective means through which to capture and share the knowledge possessed by community stakeholders.
Transforming Schools, Communities, and Universities
Authors: Harkavy Ira , Hodges Rita A. , Weeks Joann
Published: February 2022

The chapter describes the university-assisted community school approach developed by Penn's Netter Center for Community Partnerships with its school and community partners since 1985, as well as adapted nationally. The approach is grounded in John Dewey's theory that the neighborhood school can function as the core neighborhood institution that provides comprehensive services, galvanizes other community partners, and helps solve locally-manifested, universal problems such as health inequities and unequal education. Academically-based community service is presented as a core strategy for engaging the Penn's academic resources with the schools and community. Penn's evolution towards becoming a democratic anchor institution is discussed to highlight the importance of engaging the full resources (academic and economic) of the university in community partnerships. Providing concrete examples from nearly 35 years of work, the authors argue that university-assisted community schools is a promising approach to significantly improve schooling, communities, and universities.
Media Literacy Facilitation as Service Learning and Public Engagement
Authors: Olson Christine , Scharrer Erica
Published: February 2022

This chapter offers insights from a 15-year partnership between a public university and local K-12 schools to explore how the facilitation of media literacy education (MLE) programs by university students can offer rewarding outcomes for both research and learning. The MLE program that serves as the case study for this chapter takes place at local elementary schools each spring in conjunction with an undergraduate communication course and includes interactive media analysis discussions as well as a culminating creative production activity. Reflections and written feedback from participating graduate, undergraduate, and elementary students emphasize the strengths of this pedagogical model for collaboration and learning while also acknowledging the practical constraints of such a partnership. By detailing the institutional-level support, instructional design, and practical implementation of this MLE program, the chapter enumerates the benefits and challenges of engaged research and service learning for advancing media literacy goals.
Developing Online Instructional Resources
Authors: Pratt David
Published: February 2022

Online delivery of content is emerging as an efficient means for training and development in the private and non-for-profit sectors. At the same time, preservice teachers face a growing need to become effective leaders in the use of technology to support instruction. This chapter presents a framework for developing effective online learning resources for building organizational capacity while strengthening professional competency of preservice teachers. Specifically, mutually beneficial partnerships created with a regional campus of a Midwest university teacher preparation program and non-profit organizations resulted in the creation of online instructional resources. An examination of two grant-funded cases involving non-profit organizations and preservice teachers illuminates the benefits and limitations of such service-learning partnerships.
Empowering Undergraduate Students Through Community-Based Research
Authors: Punti Gemma , Chandiramani Nitya V. , Steffens Chelsea Maria
Published: February 2022

Community-based research (CBR) is a powerful pedagogical tool for actively engaging and empowering undergraduate students in their research endeavors. This chapter explores how CBR facilitated undergraduate researchers' transformative learning and the development of their civic skills when collaborating with alternative schools. Using the undergraduate researchers' reflections, focus group interviews, and a survey, this case study reveals how developing relationships with young, underserved community members was essential in changing their perspectives regarding the educational system and themselves. Furthermore, the undergraduate researchers' obstacles in collaborating with the community and within their team cohorts became critical sources of civic learning. The challenges of working with various partners fostered their capacity to navigate ambiguity, develop flexibility, and determine which experiences to communicate to community partners. CBR compelled the undergraduate researchers to maneuver through the unforeseen challenges of real life collaborations.
Tweeting @LEADUWindsor
Authors: Sabourin Brandon M.
Published: February 2022

Teacher candidates in teacher education programs are using Twitter for a variety of reasons. This chapter explores teacher candidates' use of Twitter to make their service learning experiences in the L.E.A.D. program visible. Applying Bandura's (1978) reciprocal determinism, this chapter presents a lens for understanding how teacher candidates' Twitter use contributes to social learning while engaged in a high-impact practice. A set of six effective practices for using Twitter to make service learning visible are provided, with specific reference to the tweets of L.E.A.D. teacher candidates. The chapter concludes with next steps, considerations for teacher educators, and opportunities for further research into teacher candidates' uses of social media in service learning.
Benefits of Engaging Doctoral Students in Community-Based Research Projects
Authors: Matteson Shirley M. , Arellano Irene , Sherrod Sonya E.
Published: February 2022

This chapter focuses on the self-reported benefits of 112 doctoral students in a college of education who completed a community-based research project. Findings are based on students' answers to the survey question “What did you learn about conducting research or yourself as a researcher through this experience?” The themes of knowledge, self, practice, and skill and related subthemes emerged in their written answers. Doctoral students gained knowledge and skills required of community-engaged scholars, which shaped their self-image as such. The findings of this study support the expansion of and support for community-based research projects in academic programs, departments, colleges, and universities.
Context, Curriculum, and Community Engagement in Social Justice-Focused Study Abroad Programs
Authors: Chhikara Alankrita , Oudghiri Stephanie , Lolkus Michael , Rondeau-Madrid Erin N. , Phillion JoAnn I.
Published: February 2022

The authors present findings from their study of how preservice teachers (PSTs) experienced and conceptualized social justice during two study abroad (SA) programs to Honduras and Tanzania. This study examined instructor intentionality (II), the purposefulness on the part of instructors in designing the goals and objectives of study abroad through a selection of context, curriculum, and community engagement. Intentional programming that sought to unfossilize prejudices by providing non-Western-centric curricula was emphasized. In this case study, authors analyzed and interpreted data using a framework for social justice rooted in three components: redistribution, recognition, and representation. The themes discussed in this chapter address (1) the influence of partnerships with community members in the development of social justice curricula; (2) differences across SA programs indicative of multiple approaches to social justice; and (3) various contexts, experiences, and curricula in cultivating social justice-minded educators.
Innovation in Civic Education
Authors: Driscoll III Tom , McCusker Shawn
Published: February 2022

Educators, advocacy groups, and policymakers are mobilizing to strengthen civic education across the nation. These renewed commitments must be designed and implemented in ways that ensure today's graduates are ready to effectively engage in modern civic life. Since civic education is key to effective participation in our democracy, ensuring a quality civic education is also an equity issue. Students must have foundational knowledge about our nation's values and government, effectively evaluate the validity of claims in digital media, take and defend positions across multiple platforms, and leverage technology to inform and mobilize their community around ideas they care about. This chapter explores proven practices in civic education and technology-enhanced instructional approaches that schools can leverage to modernize their civic education programs.
Community-Engaged Research
Authors: Zimmerman Aaron Samuel
Published: February 2022

Community-engaged research describes an approach towards research and a stance towards scholarship that arose in response to the criticism that institutions of higher education functioned only as ivory towers, disconnected from real-world problems. This chapter is intended to serve as an introduction to the concept of community-engaged research. Topics covered will include the definition of community-engaged research, the criteria for the evaluation of community-engaged research, inherent challenges associated with community-engaged research, and strategies that institutions of higher education can employ as a means of cultivating and sustaining community-engaged research among faculty.
African Transformation Agenda to Promote Inclusive Education
Authors: Sabela Primrose T. , Ndhlovu Busile Cynthia
Published: February 2022

The chapter appraises transformation as a tool to promote inclusive education using the philosophy of Ubuntu as a framework for reforming African higher education. The general guiding question relates to whether African higher education considers African philosophy in its policies. Transformation does not only refer to structural changes but also entails ensuring that the knowledge transferred relates to the local context and considers access by all and that all are treated with dignity and respect as valuable members of higher education and society at large. Ubuntu philosophy with its core values of humaneness, sharing, interdependence, and the social justice imperatives of equity, redress, and inclusion could contribute to the reconfiguration and transformation of higher education. The philosophy accommodates the rich sense of social characteristics of African society arguing that this could lead to increased access and success, including other essential attributes required to address the current dilemmas and challenges faced by the African higher education sector.
An African Perspective of Inclusive Education
Authors: Maguvhe Mbulaheni Obert , Tshangela Siyabulela
Published: February 2022

This chapter highlights an African perspective of inclusive education issues, challenges, and how ubuntu philosophy could be used to address them. The chapter targets academics, researchers in inclusive education, inclusive education policymakers, school management teams, advocacy groups, adult and early childhood development practitioners, government officials, interested parties in education from NGOs, individuals with disabilities, parents, and guardians as its audience. One of the inclusive education challenges highlighted in this chapter is that South Africa is seriously grappling with the effectual capacity and material impact of her policies conceptualised and promulgated at the national level and other related transformative education policies. It will be important to pose the following interrogative question: To what extent does inclusive education policy actually shape practice in intended ways at the school and classroom level?
Modelling Inclusive Education in Rural Schools
Authors: Nkomo Duduzile , Dube Buyisani
Published: February 2022

The successful development of truly inclusive societies requires critical sectors of the community to uphold principles of inclusiveness. These include, but are not limited to, the nucleus family, extended family, and school. Nonetheless, this chapter shows how inclusive education can be modelled or provided in rural schools found in African settings. This is basically viewed through the lenses of ‘ubuntu' and ‘Afrocentrism'. In the African context, these concepts denote issues of humanity, justice, dignity, respect for one another, and connectedness of people. It is on the basis of these that the provision of inclusive education in rural schools is interrogated. A selection of African countries is used to validate the discussion. The chapter further discusses challenges and factors influencing successful implementation of inclusive education in rural schools. Remarks that provide suggestions for best practice conclude the chapter.
Inclusive Education
Authors: Maapola-Thobejane Hlabathi Rebecca
Published: February 2022

This chapter outlines the aspects entailed in the effective implementation of inclusive education. Four building blocks for the effective implementation of inclusive education are highlighted as the teacher, collaboration, organization, and motivation (TCOM) pyramid. Other elements identified as important are teachers' qualifications, the adoption of inclusive teaching strategies, inclusive assessment, and collaboration. Furthermore, the school is flagged as an organization that contributes to the effective implementation of inclusive education. The schools' characteristics are highlighted as the culture, climate, resources, leadership, structure, and staff capacities. The chapter concludes by presenting motivation as another aspect that contributes towards the effective implementation of inclusive education. Lastly, tenets of motivation that include the qualified benefit, compatibility, intricacy, visibility, and urgency are presented to show how they contribute towards the effective implementation of inclusive education in schools.
How Online Grading Feedback Might Benefit From a Grounding in Feminist Theory
Authors: Schneider Jennifer
Published: February 2022

This chapter explores the application of feminist theory to online grading feedback processes in higher education. Christianakis describes teacher research as a feminist act. This chapter presents the argument that grading feedback can be viewed from a complementary lens. Many believe that feedback, when offered correctly, has the ability to transform a learner for the better. When actively and intentionally viewed from a feminist perspective, feedback offers a plethora of opportunities to not only teach content, but also to empower and address power inequities. Feminist theory also offers helpful guidance on how to do so.
Gender Differences in Cognitive Loads, Attitudes, and Academic Achievements in Mobile English Learning
Authors: Yu Zhonggen
Published: February 2022

Studies on gender differences in mobile English learning are in their initial stages. College English IV, designed by a number of professors and engineers in a university in China, serves as a mobile English learning platform. This study aims to determine gender differences in cognitive loads, attitudes, and academic achievements in English language learning assisted with this mobile English learning platform. Through a mixed research design, 79 randomly selected participants join the research, together with interviews and posts to collect qualitative data. Cognitive loads, attitudes, and academic achievements are measured through related scales to collect quantitative data. It is concluded that there are significant gender differences in cognitive loads, attitudes, and academic achievements in English language learning assisted with the mobile learning platform. Future research on gender differences in mobile English learning should also examine relationships between gender differences, learner motivation, achievement goals, and learning outcomes.
A Voice of Her Own
Authors: Yanıkkaya Berrin
Published: February 2022

This chapter provides a theoretical discussion on women's voice and agency by referring to the selected works from feminist theory and history. It highlights the importance of storytelling in women owning their own voice and exercising their agency through the multilayeredness of the experiences of women coming from diverse socio-economic and cultural backgrounds. Also, in this chapter, digital platforms and what they offer to women, such as digital storytelling, are discussed. And finally, it includes academic and activist works on individual and collective digital storytelling examples and practices of women from around the world.
Gender Is Political
Authors: Aytekin Pelin Erdal
Published: February 2022

Studies on women identity in the context of gender yields significant results, especially when considering the practice of cinema. Mainstream cinema is an essential area of indicators for handling women's identity. Susuz Yaz and Yılanların Öcü films are two important films in which Metin Erksan dealt with the concept of property within his filmography. These two films, which address the concept of property through the ownership of land and water, also represented the social existence of women's identity with the rural lifestyle in particular, making the social structure in which women are perceived as property visible. In this context, the study evaluates the image of the woman in cinema on the concepts of body, property and rights. The method approach shaped its roots from the foundations of sociology, communication and cultural theories. The subject was presented by analyzing it within the perspective of interpretive social science. It was concluded that the debate on whose property the land and water are also raised the discussion of the property of women's identity.
Ensemble Model for the Risk of Anemia in Pediatric Patients With Sickle Cell Disorder
Authors: Balogun Jeremiah Ademola , Asinobi Adanze O. , Olaniyi Olawale , Adegoke Samuel Ademola , Oladeji Florence Alaba , Idowu Peter Adebayo
Published: February 2022

Anemia is a major cause of morbidity and mortality of SCD patients in many parts of the world with the burden much higher in Sub Saharan Africa. This study developed an ensemble of machine learning algorithm for the prediction of the risk of anemia in pediatric SCD patients. Data for this study was collected from 115 pediatric SCD outpatients receiving treatment at a tertiary hospital in South-Western Nigeria. This study adopted a stack-ensemble model composed of deep neural network (DNN), multi-layer perceptron (MLP), and support vector machines (SVM) as base and meta-classifiers using the WEKA software. The ensemble models were compared following the stack-ensemble developed using SVM as a meta-classifier had the best performance with an accuracy of 72.7%. The study concluded that information about socio-demographic and clinical data can be used to assess the risk of anemia among SCD patients.
Blockchain-Based Infrastructure for Product Traceability in the Medical Supply Chain
Authors: Gürpinar Tan , Ashraf Sk. Riad Bin , Broza-Abut Natalia , Sparer Dominik
Published: February 2022

This chapter introduces a blockchain-based infrastructure to support the traceability of medical products and implementation of unique device identification. Therefore, in the next pages, the characteristics of blockchain technology as well as benefits and challenges in supply chain management are described. After that, regulations for medical supply chains are gathered with a focus on American and European regulations and interlinked with the current concepts of the labling medical products. Finally, a technical blockchain-based solution is conceptualized with regard to full and light node system in medical supply chains before the chapter is concluded with an outlook and further scientific and technical research possibilities.
A Decentralized Privacy Preserving Healthcare Blockchain for IoT, Challenges, and Solutions
Authors: Pal Kamalendu
Published: February 2022

Healthcare industry operation needs resources and information sharing between business partners. Internet of things (IoT) aims to simplify distributing data collection in the healthcare business, sharing and processing information across collaborative business partners using appropriate information system architecture. However, a large portion of existing IoT-based healthcare systems leveraged for managing data is centralized, posing potential risks of a single point of failure in natural disasters. The medical data privacy and security problems could result from a delay in treatment progress, even endangering the patient's life. This chapter describes the use of blockchain-enabled secure management of healthcare systems. Blockchain technology contributes to transactional data's intelligent and flexible handling through appropriate convergence with IoT technology in supporting data integration, processing, and providing data privacy and security-related issues. Finally, the chapter presents challenges and solutions on blockchain-based electronic healthcare record (EHR) systems.
Analysis of Market Determinants Impacting the Blockchain Technology in the Healthcare Sector
Authors: Thakur Anusha
Published: February 2022

Blockchain technology is paving its way from novel technology to leveraging its exclusive proficiencies. This technology refers to a platform that chronologically accounts and tracks the transactions and assets via distributed ledgers in a network. In today's scenario, the blockchain technology is gaining traction to completely revolutionize the healthcare services. This chapter discusses different competitive advantages offered by the healthcare sector on inclusion of blockchain technology in their strategic decisions and models. One of the key focus areas of the chapter includes market determinants impacting blockchain technology in the healthcare industry along with the market sizing and forecast analysis. Further, this chapter emphasizes how the blockchain concepts help in simplifying healthcare businesses amidst different challenges being faced by these industries in today's competitive scenario.
Application of Additive Technologies in the Development of Aerodynamic Models for Rocket and Space Technology Products
Authors: Volkhonskiy Alexander E. , Dudkov Kirill V. , Boksha Ludmila V.
Published: February 2022

Experimental work was carried out on the development of variants of additive technologies of layer-by-layer synthesis (FDM, SLA) for the manufacture of aerodynamic models of aircraft intended for testing in wind tunnels. The material of the models is selected, the production modes and design variants of the models of the fairings of space launch vehicles are described.
Mechanical Properties of Co-Al-Mo-Nb Intermetallic Alloys
Authors: Davidov D.I. , Ezhov Igor , Popov Nikolay A. , Kazantseva Nataliya
Published: February 2022

The results of the experimental study of the mechanical properties and structure of the Co-9.5Al-2.9Mo-4Nb, Co-9.1Al-5.2Mo-4.7Nb, and Co-8.9Al-6.5Mo-9.3Nb alloys were presented. The Young’s moduli in the studied alloy samples were found to be smaller than those of Ni3Al-based and Co3(Al,W)-based alloys. The eutectic structure was observed in all studied alloys. Cuboids of the Co3(Al,Nb,Mo) intermetallic compound with L12 crystal structure were found by TEM study.
Influence of Preheating and Postweld Heat Treatment on the Structure and Strength of the Wire Frame Welded Joint Made of Spring Steel C62D
Authors: Trukhanov Konstantin , Golovacheva Julia , Ditkovskiy Pavel , Levko Pavel
Published: February 2022

This article investigates the automatic welding of Ø4.5 mm high carbon steel wire frame. Using spring steel wire frame in car seat fabrication reduces its weight and helps to maintain rigidity. The thermal effect during the welding process can unacceptably deteriorate the mechanical properties of the material. It is proposed to use preheating and heat treatment to obtain a joint with required mechanical properties. To reduce of effect on entire product rigidity the thermal treatment was carried out locally in the zone of joining. Heating was carried out using a gas flame. Metallographic and microhardness measurements were used for the structural study. Mechanical properties were evaluated by static tension and free bending test. The recording of thermal cycles during the welding and heat treatment was carried out using chromel-alumel and tungsten-rhenium thermocouples.
Model Selection and Dragging Parameters in Cross-Wedge Rolling
Authors: Klyueva Irina , Belokurov Oleg A. , Allenov Maksim G. , Andryushchenko Irina
Published: February 2022

This paper describes QForm computer simulation of a large-sized blade preform shaping, using cross-wedge rolling. Scenarios of friction consideration between the workpiece and the tool are examined.
Hybrid Optimization for Machinability Enhancement during Green Machining of Stainless Steel
Authors: Gupta Kapil
Published: February 2022

Stainless steel 304 is one of the most promising materials for many industrial applications. Its machinability is poor whether machined in any environment. Conventional machining causes environmental degradation as well. In this paper, sustainable machining of SS304 using green lubricant is presented. Experiments have been conducted on Taguchi’s robust design of experiment technique. For machinability enhancement, a hybrid optimization technique VIKOR-Regression-PSO is employed. Machinability indicators that have been considered are tool wear, surface roughness, and chip reduction coefficient. Cutting speed, depth of cut, and feed rate have been considered as the variable machining parameters in this work. The hybrid optimization has been found very effective and provided a set of optimum machining parameters i.e. cutting speed-70m/min; feed rate-0.1mm/rev; depth of cut-0.5mm for the best values of machinability indicators i.e. tool wear-249.22 μm, roughness-11.08 μm, chip reduction coefficient-2.26.
Change in the Fine Structure of the Additive Al-Mg Alloy after Electron-Beam Processing
Authors: Geng Yan Fei , Panchenko Irina , Chen Xi Zhang , Ivanov Yurii F.
Published: February 2022

Electron beam processing was considered to be the promising modification method for Al-Mg alloys. An investigation of the effect of high energy density on the surface modification layer was developed. The results demonstrated that the grain boundaries emerged and there are some microcracks formed along grain boundaries due to superfast heating and cooling speed during the treatment process. Due to this special microstructure morphology, the average friction coefficient was decreased but the wear volume was increased, and the yield strength and the ultimate tensile strength are reduced.
Large-Scale Synthesis of Molybdenum Carbide Based Catalyst by Vacuum-Free DС Arc Plasma Method
Authors: Vassilyeva Yuliya Z. , Mamontov Gennadiy , Pak Alexander Y.
Published: February 2022

The paper presents experimental studies on the synthesis of materials based on molybdenum carbide, which can be used as a catalyst for hydrogen production by water splitting. We successfully carried out experiments to scale up the process, namely, the amount of the synthesized product was increased by 4 times with the same parameters of the experimental setup. In this case, the specific energy decreases taking into account the increase in the mass of the product. The energy intensity of the material obtained has been reduced from 520 kJ/g to 130 kJ/g.
Non-Sinusoidal Waves in a Metamaterial, Specified as a Nonlinear Elastic Lattice with a Center of Symmetry
Authors: Kolesov Daniil , Erofeev Vladimir I. , Malkhanov Alexey O. , Shekoyan Ashot V.
Published: February 2022

It is proposed a mathematical model of a metamaterial which is represented as a nonlinear elastic two-mass chain with a center of symmetry. The model was continualized. The conditions for the formation of non-sinusoidal strain waves are analyzed.
Stages of Cavitation Erosion Development on Steel Surfaces
Authors: Fatyukhin Dmitriy S. , Nigmetzyanov Ravil I. , Sundukov Sergey K. , Sukhov Aleksandr V.
Published: February 2022

The authors investigated the effect of ultrasonic cavitation on the surface of St3, 20, 45 steels. It was found that cavitation causes a change in the structure and properties of the surface layer of the samples. A refinement of the grain and an increase in the microhardness of the surface layer similar for the investigated materials were revealed. The dependences of dynamics of the increase in microhardness under the action of ultrasound were given, which show that there was a steady state, characterized by an indicator of relative microhardness of 1.3...1.5. The results of changes in the parameters of roughness and sub-roughness were given. Studies showed that cavitation erosion leads to an increase in altitude and step parameters of the surface microgeometry. The research results can be used for development and creation of ultrasonic technological processes carried out in liquid media.
Mathematical Modeling of Anodic Oxidation and Cathodic Reduction of Metals Prone to Passivation, Taking into Account the Peculiarities of Heat and Mass Transfer in the IEG under Pulsed Modes
Authors: Vinokurova Irina , Khlopovskikh Ekaterina , Tychinina Anastasia , Safonova Lyudmila
Published: February 2022

In the work, a variant of mathematical modeling of the solution of the heat transfer problem was developed, analytical analysis of the dependencies of the parameters of technological parameters was carried out to determine the parameters of current pulses that ensure a uniform distribution of current density over the treated surface. A diagram of the stages of constructing a complete mathematical model of the ECDP process (electrochemical dimensional processing) of titanium, aluminum, and their alloys is given. The above equations reflect the theory of mass transfer processes, include the temperature parameter. The limitations of the possibility of carrying out the treatment process are modeled, the peculiarities of formation and development of the gas-liquid layer, changes in its physical properties, and violation of the treatment stability are taken into account. It has been found that to eliminate the processing instability associated with the appearance of turbulence in the electrode reaction zone due to the large gas filling of the interelectrode gap, a series of relationships must be considered DT = f (i, Q, timp) to determine optimal parameters of pulse current.
Influence of Titanium and Nitrogen on Phase Composition and Properties of Coatings Obtained by Surfacing with Cast Rods of PNL-04Kh27N7M3D2T Type
Authors: Nazarko Aleksandr , Plomodyalo Roman
Published: February 2022

The influence of titanium and nitrogen on phase composition and properties of coatings obtained by surfacing with cast rods of PNL-04Kh27N7M3D2T type is considered. It was found that at a titanium content of less than 0.25 wt.%, the phase ratio changes in favor of austenite, and the resistance of the deposited metal with a low titanium content against ICC can be achieved at a nitrogen content of ≤0.05 and carbon of ≤0.02.
Implementation of a Fatigue Fracture Approach to Grinding Wheel Wear Using Numerical Simulation
Authors: Kurnenkov Anton , Shurygin Aleksej , Glebov Vladimir
Published: February 2022

The paper proposes an approach to assessing the grinding wheel wear, which includes the wear of grains and pulling them out of the bond, based on fatigue failure under cyclic loads caused by cutting forces, with a period of the order of microseconds. This approach is implemented on the basis of stress life calculation in the ANSYS Fatigue module using loading data obtained from the numerical simulation of grain-workpiece interaction. The simulation results allows to obtain the grain wear area, the level of bond fatigue fracture and the possibility of self-sharpening of the grinding wheel for a given grain size and operation conditions.
Modeling the Temperature Dependences of the Dielectric Constant of PCM under Conditions of Intense Heating
Authors: Dmitrienko German V. , Mukhin Dmitry V.
Published: February 2022

The paper discusses computer modeling of the temperature dependences of the dielectric constant of polymer composite materials. Issues of the combined radio wave and thermal methods of diagnostics of nondestructive inspection of the polymer composite materials in the laboratory conditions are considered. The paper offers a method for combining the measurement and heating processes. This method can be implemented, the way is to do the heating and the measurement at the same frequency with using a high-power sounding wave. As a result, the radiant material heating is obtained, and we judge about the substance parameters and a presence of defects in the substance by a reflected wave in an indirect method. A descriptive characteristic of such a problem boils down to describing all the processes in the sample by the electrodynamic theory. The heating process can also be described by the electrodynamics equations, but the process will be described by the thermal equations in the nonstationary heating conditions in the most accurate way.
Influence of High-Speed ECAP on the Structure and Properties of Copper and Copper Alloy of Cu-Cr System
Authors: Aksenov Denis , Asfandiyarov Rashid , Raab George
Published: February 2022

The paper presents the results of a study of changes in the structure during equal-channel angular pressing (1 and 4 cycles) with a deformation rate of 320 mm/s. It was found that a significant structure refinement of copper M1 and Cu-1.1Cr alloy to an ultrafine-grained state occurs already after 1 ECAP cycle. A predominantly band structure with a transverse size of fragments of ~ 200-300 nm occurs. A specific feature of the structural state is alignment of low-and high-angle boundaries by dislocations and absence of unbonded dislocations in the body of fragments. After 1 cycle of ECAP, practically no dispersed particles are observed in the body of Cu-1.1Cr alloy grains, and the electrical conductivity does not change in this case. The maximum hardening of copper M1 is observed after 4 ECAP cycles-1320 MPa with an electrical conductivity of 89% IACS for Cu-1.1Cr alloy, the maximum hardening is achieved after 1 cycle of ECAP and aging at 450 °C for 1 h-1655 MPa with an electrical conductivity of 77% IACS.
Modification of the Surface of Structural Materials by Concentrated Energy Flows in Order to Improve their Performance Properties
Authors: Ilinykh Sergey A. , Krashaninin Vladimir A. , Ilinykh Nina I. , Leontiev Leopold
Published: February 2022

The work is devoted to the basics of surface modification of structural materials for the effective protection of machine parts and mechanisms operated in extreme conditions from the mechanical impact of aggressive media, by the method of plasma-chemical exposure to concentrated streams of matter and energy by means of plasma generators, which allow for surface renovation and engineering.
Application of Combined Processing Methods for High-Tech Products Manufacturing
Authors: Ryazantsev Alexander , Shirokozhukhova Anna , Kovalev Sergey
Published: February 2022

The article considers the combined processing methods used in the rocket and space technology products manufacture. The technology of obtaining holes in the nozzles of the liquid rocket engine mixing head is presented. The relevance and necessity of using high-tech technologies in the special equipment parts and assembly units manufacture is justified. The ways of ensuring the process stability and technological parameters increasing are shown, which made it possible to expand the application area of dimensional combined processing using the electrode as a tool. The results obtained allow us to expand the production technological capabilities, as well as to improve the technical special equipment products characteristics in mechanical engineering.
Investigation of Hadfield Steel Machinability in Milling Operations
Authors: Pyatykh Aleksey , Savilov Andrey , Timofeev Sergey
Published: February 2022

Hadfield steel is widely used in the manufacture of machines and mechanisms operating in harsh conditions. When machining Hadfield steel parts, problems are due to the strain hardening. The article studies the influence of cutting modes on steel hardness, tool thrust and surface roughness when milling Hadfield steel using cutters with replaceable inserts. The experiments were conducted on a milling machining center using high-productivity cutting tools. The optical roughness measuring method was applied. Hardness was measured with a portable hardness tester before and after milling. The article describes experimental results that show the dependence of the output machining parameters on the cutting speed and feed per tooth. The influence of cutting data on tool life in a finish milling operation was identified. The results will help to improve the quality and productivity and increase the tool life in roughing and finishing Hadfield steel parts.
Thermodynamic Analysis of the Nickel-Chromium-Titanium-Nitrogen System
Authors: Savinykh Leonid M. , Kornyusheva Tatyana V.
Published: February 2022

It is of great interest to be able to remove residues of impregnating material from the resulting article in order to reduce the cost of manufacturing such parts. To this end, a thermodynamic calculation allows you to obtain the necessary conditions for obtaining high-quality products.
Prospects for the Synthesis of Silicate Geopolymer Materials Based on Ash and Slag Waste from Thermal Power Plants in the Russian Arctic Zone
Authors: Yatsenko Elena A. , Klimova Lyudmila V. , Goltsman Boris M. , Golovko Dmitriy A.
Published: February 2022

The issues of ecology and economics of the use of solid organic fuels for the production of thermal and electric energy, as well as the disposal of their combustion products, are becoming more and more relevant not only in our country, but also in world practice. The formation of industrial waste, in particular ash and slag waste, creates a number of difficulties. One of the main ones is a violation of the environment, which is also relevant for the Arctic zone of the Russian Federation. On the territory of the Arctic zone of the Russian Federation, along with hydroelectric power plants, nuclear power plants and thermal power plants operating on gaseous and liquid fuels (fuel oil), a significant share (on average, at least 20%) is taken by coal generation. An equally urgent problem of the Arctic zone of the Russian Federation is the problem of road construction in permafrost conditions and extreme climatic conditions.
Influence of Composition and Structure on Wear Resistance of Deposited Metal
Authors: Nazarko Aleksandr , Plomodyalo Roman
Published: February 2022

Comparison of the data on resistance of alloys against abrasive wear made it possible to establish that alloys with a predominantly austenitic or austenitic-martensite matrix and eutectic component based on alloyed chromium carbide Cr7C3 [5] or Cr23C6 have the highest wear resistance, while microhardness of austenite and martensite should be higher than 5000 N/mm2. In alloys with high wear resistance, there is also no significant difference in microhardness of eutectic and primary crystals of γ-iron, which is probably one of the indicators of adhesion strength of carbides and solid solution. In the case of formation of a pearlite component, wear resistance drops sharply.
Influence of the Duration of Current Pulses on the Roughness in the Combined Processing of Corrosion Steel 12H18N10T
Authors: Lobanov Dmitry , Borisov Mikhail , Yanyushkin Alexander , Skeeba Vadim
Published: February 2022

The competitiveness of engineering products in the world market is often determined not only by the quality and operational characteristics of products, but also by the cost saving level and labor intensity of their manufacture. This became especially relevant when a wide range of high-strength and difficult-to-machine construction materials appeared, the processing of which by conventional methods is difficult and ineffective. In recent years, various methods are increasingly used for the shaping of parts made of these materials, the efficiency of which is higher due to the combination of several types of effects on the processing object - combined methods. So, for example, the methods of electrolytic abrasive machining with abrasive disks on a conductive bond have replaced the traditional grinding. One of the particular cases of method implementation is processing with a periodic change in the current pulse direction: direct polarity for electrochemical softening of the processed surface, reverse polarity for restoring the cutting ability of an abrasive tool. Whereanent, the purpose of the work is to establish the effect of dressing current pulses duration on the surface roughness of products made of corrosion-resistant steel of 12H18N10T grade. For laboratory research, a bench was designed and manufactured to simulate the conditions of combined processing. It has been experimentally proved that the smallest roughness value Ra = 0.26 μm is observed at the following values of the current pulse duration: the current pulse of direct polarity duration τst = 1 s and the current pulse of reverse polarity duration τre = 1 s. This allows us to recommend the indicated values in order to ensure high quality of processed surfaces of products made of corrosion-resistant steel 12H18N10T of grade
Weldability Window for High-Velocity Impact Welding of Al and Ti Plates Obtained by Numerical Simulation
Authors: Emurlaeva Yulia Yu. , Aleksandrova Natalie S. , Bataev Ivan A.
Published: February 2022

In this study, the process of high-velocity impact welding of commercially pure Al and Ti plates was simulated using smoothed particle hydrodynamics (SPH) method. The paper aimed to determine by numerical simulation the range of collision parameters suitable for Al and Ti welding, and to compare the results obtained with the known semi-empirical models used to construct the "weldability window". For this, a set of simulations with different collision point velocity and collision angle was carried out. From the data obtained, it follows that SPH simulation reproduces well the shape of the interface, typical for high-velocity impact welding, and provides better understanding of material flow and related phenomena. This method allows one to select the collision parameters that are optimal for a high-quality joint.
Effect of Pb Small Additives on the Phase Composition and Microstructure Pd-Based Membrane Alloys
Authors: Akimova Olga V. , Svetogorov Roman D. , Gorbunov Semen V.
Published: February 2022

The effect of Pb small additives on the microstructure and phase composition of palladium-based diffusion membrane-filters was studied in this work. In the present study, we comprehensively investigated the lead-containing palladium alloy by X-ray diffraction using synchrotron radiation and high-resolution scanning electron microscopy. The predisposition of the alloy to the formation of a conditionally homogeneous nanodisperse substructure with small values of micro-deformations is established. The stable preservation of the phase composition during a single hydrogenation is revealed.
Constructional Features and Energetic Parameters Influence on Structure Formation and Sealed Welded Joints Properties in the Production of Capsules for Hot Isostatic Pressing
Authors: Zhilin Pavel L. , Rudenko Danila O. , Melnichenko Oleg P. , Uglov Nikolay S. , Bazhenov Evgeny O.
Published: February 2022

The features of the formation of the structure of welded joints for various welding modes and energy parameters of welding capsules for hot isostatic pressing are given. Mechanical properties are investigated for each of the modes.
Research of the Possibility of Using Glass and Sodium Hydroxide for Synthesis of Aluminum Silicate Propants Based on Drill Sludges
Authors: Yatsenko Elena A. , Tretyak Aleksandr A. , Chumakov Andrey , Smoliy V.A.
Published: February 2022

In connection with the gradual development of deep oil deposits, it is necessary to develop deposits at a depth of no more than 3000 m. For the production of such oil, the method of hydraulic fracturing with the injection of hydraulic fracturing fluids and proppants under high pressure is actively used. Proppants are used as proppants, which are granular bulk material. Their application depends on the depth of the well and the composition of the reservoirs. In the process of oil production, a large amount of drill cuttings is formed, which must be processed and used as raw materials, for example, for the production of aluminosilicate proppants. This paper discusses the possibility of using drill cuttings, ground cullet and alkali to obtain proppants. To achieve this goal, studies of drill cuttings were carried out, a technology for obtaining aluminosilicate proppants and raw mixtures was developed, during the molding of which the studied samples were fired and underwent the necessary studies, on the basis of which the corresponding conclusion was made.
The Structure and Characteristics of Wear-Resistant Coatings, Obtained by Supersonic Plasma Spraying
Authors: Kuzmin Victor , Gulyaev Igor , Sergachev Dmitriy , Tambovcev Alexander , Palagushkin Boris , Matveev Stanislav , Shirobokov Oleg
Published: February 2022

The characteristics of coatings designed to protect against cavitation and waterjet wear, obtained by supersonic atmospheric plasma spraying using air as a plasma-forming gas, are studied. The following powder materials were selected for coating: WC/10Co4Cr; Ni-Cr-B-Si-C; Ni-Al; Ni-Ti; bronze. Metallographic studies of the structures of specimens with applied coatings and measurements of their microhardness were carried out. Due to the fact that the tests of materials for hydroabrasive wear are not standardized, studies were carried out on the resistance of coatings to dry abrasive wear according to the ASTM G65-04 standard and to dry reciprocating friction according to the ASTM G133 standard. The conducted studies of the structures of the sprayed coatings suggest that the use of supersonic deposition modes guarantees the production of high-density coatings with a porosity of less than 1 %.
Experimental Study of Material Structure in the Processing of Ball Pins
Authors: Katunin Andrei , Burnashov Michail , Tryastsin Anton , Baranov Yuri
Published: February 2022

The article presents a technique for experimental studies of microstructure of microsections during rolling of ball pins made of 38KHGNM and 40KH steels. Moreover, photographing was carried out in the pole and equatorial parts of the ball pin head, as well as at the cross-cut end. When analyzing the photographs of microsections, it was concluded that after the final rotary rolling, deformation grinding of the grains occurred in the structure of ball pins.