bluuebunny/crossref_metadata_2025 huggingface dataset:
Teaching for Information Literacy: Online Professional Development Challenges
Authors: Moore Penny , Page Nicki
Published: April 2021

Awareness of the need for all teachers to be information literate has prompted a proof-of-concept project to create an online resource for use in self-directed study by teacher-librarians and teachers. The resource includes information literacy theories and teaching strategies that are modelled in supporting adult educators and students as learners. The professional development gains for participants, evidence of student learning resulting from teaching for information literacy and factors to be considered in moving from live workshops to online environments for self-directed study are examined. Questions are raised concerning the nature of online in-service education to promote information literacy. Implications for teacher-librarians as collaborators and information leaders are discussed.
National Information Policies - A Comparative Study with Particular Reference to South Africa and School Libraries
Authors: Arnold Anna-Marie
Published: April 2021

The government of South Africa has committed itself towards the obliteration of poverty and to achieve social and economic development. National information policies are used by countries to address these and other problems. A national policy is generally motivated by public and political party concerns and legislation is passed as the best option to meet the ideal set by the government for the issue(s) on hand. Within modern society education can be linked to national development. School libraries form an integral part of the modern approach to teaching and learning. School library development in South Africa is shown to be problematic in a number of ways. Similar problems exist in other African countries. Recommendations are made for the government of South Africa to address these issues in a national information policy. Many other African countries should also address the development of school libraries.
Online Library Systems for Malaysian School Libraries: An Experimental Approach
Authors: A. N. Zainab , Abdullah Abrizah
Published: April 2021

This paper describes the development of two experimental school library information systems for Malaysian schools. The results of a user study, conducted using different sets of questionnaire for both types of schools indicated that students in general, borrowed books from the library by browsing the shelves. Students seldom used the catalogue card for searching and only a small percentage reported that they were able to find the books successfully using the catalogue card. Based on the findings, a conceptual model of the prototype automated catalogue was developed - Virtual Library for use in primary schools, and ELIS for secondary schools. Both systems are divided into two main modules, the Administrator and the User module. User acceptance test showed that the majority of students found the systems user friendly. Students were also successful in the search tasks given. A high majority described the graphical user interface to be attractive and simple. This indicates the feasibility of using the systems for school libraries in Malaysia.
Developing 21st Century School Media Resource Libraries for Singapore
Authors: Majid Shaheen , Chaudhry Abdus , Foo Schubert , Logan Elisabeth
Published: April 2021

In light of global calls for emphasizing innovative thinking and creative problem solving in elementary and secondary schools and a more collaborative role for school media resource libraries to support the new focus, a taskforce of four faculty members from the Division of Information Studies of Nanyang Technological University undertook to assess the status of a selected group of thirteen media resource libraries in Singapore. Data obtained from questionnaires and focus groups indicate that for Singapore's School Media Resource Libraries to play a significant role in supporting the new educational focus some important changes are needed. Recommendations from the taskforce include a change in status of the School Media Resource Library and its supervisor, additional training and education for these supervisors, improved access and connectivity for inter-school cooperation, and more collaborative collection management policies.
The School Library as a Dynamo within the Learning Community of the School
Authors: Greef Elizabeth , Jenkins Yvonne
Published: April 2021

This paper demonstrates how a school library can be an intellectual power centre, a dynamo within the school, helping to build citizens of a knowledge society, using a variety of research-based units of work designed by teacher librarians at St Andrew's Cathedral School in collaboration with teachers across the curriculum. The types of units are information-skills-based units, units based on Bloom's Taxonomy, PowerPoint units, Internet research-based units. The paper also discusses the advantages of and strategies for using an Intranet to support teaching and learning as well as elements helpful for nurturing a culture of collaboration and a vital relevant library.
Developing a Knowledge Society through Teacher Librarians
Authors: Wijetunge Pradeepa
Published: April 2021

This paper briefly discusses the knowledge society and characteristics of the knowledge society at the beginning. Secondly it discusses the implications of knowledge society on education and the role of teacher librarian in the knowledge society. Then it goes on to discuss the education system of Sri Lanka, status of school libraries in Sri Lanka, the second General Education Project which supports the implementation of education reforms and the establishment of National Institute of Library and Information Science (NILIS) with an emphasis on training of teacher librarians by NILIS. Finally it describes the implementation model of its knowledge skills programme and the model and contents of the actual knowledge skills programme. The paper is concluded with some remarks on the factors, which will affect the success of the project.
Western Theory - Vietnamese Praxis
Authors: Parr Gail , Nguyen Chung Hong
Published: April 2021

This paper provides an ethnographical account of the experience of setting up an open access library of working alongside and in close collaboration with different parties within an academic environment over the period of four years in Hanoi. It provides useful lessons for consideration for those who would like to facilitate the blending of western practices in librarianship with local knowledge in developing countries such as Vietnam. It also presents a platform for an outside's view of the practice of teacher librarianship.
Variety, Flexibility and Autonomy: Intrinsic Rewards of Teacher-Librarianship
Authors: Esser Linda G.
Published: April 2021

This study explored the initial motivations and intrinsic rewards of eighteen women who chose to become elementary school teacher-librarians. Participants' initial motivations were consistent with those of their classroom teacher-colleagues in most areas examined by the study. However, participants indicated three initial motivations or intrinsic rewards that appear specific to teacher-librarianship: variety, flexibility and autonomy. Participants' stories provide insight into how they view their work and how they negotiate work relationships with their classroom teacher-colleagues, and negotiate for autonomy in the workplace.
Perceptions of Reading of Children with Comprehension Difficulties
Authors: Maniotes Leslie K.
Published: April 2021

This study addresses the question of how students with comprehension problems perceive reading. The subjects of the study are eight to ten-year-old students from the South Eastern United States. Students' reading comprehension was assessed and interviews were used to elicit perceptions of reading. The results suggest that these students see reading as a school-related task rather than something for enjoyment or entertainment. The report includes three case studies elaborating on the diversity and depth of individual children. A final discussion considers what school librarians can do to help children become aware of purposes for reading as making meaning.
Information Literacy in New Zealand Secondary and Primary Schools
Authors: Slyfield Helen
Published: April 2021

New Zealand schools were surveyed on current aspects of developing information literacy. The research also sought to identify schools' priorities to further develop these skills. Response rates were 63% (secondary schools) and 67% (primary schools). Most schools are working on various aspects of teaching information skills and considered their students are developing these skills to at least some extent but recognise that there is still some way to go. Research showed a strong need for professional development for teachers and for information literacy resources covering the place of information skills in the curriculum, a skills framework at each level, and practical help for teaching and evaluating information skills.
Primary School Reading Materials and Contexts of Change in New Zealand's School Journal, 1907-1989
Authors: Van RiJ Vivien
Published: April 2021

This paper considers primary school texts as resources for teaching reading and as children's literature, applying principles of close reading and New Historicism theory to explore the effects on texts of changing social, political, and pedagogical contexts in the twentieth century. Particular issues discussed are predominant themes and ideologies, narrative technique, representations of systems of authority and control, the positioning of the child reader, and the relationship of the text to curriculum and the teaching of reading. There will be a focus on the School Journal, as New Zealand's longest running periodical, an apt illustration of contextual change.
Addressing Plagiarism through Improved Notetaking
Authors: Wilson Dianne
Published: April 2021

The expanding range of information sources available for student research activities has led to greater awareness of the occurrence of plagiarism in its various forms. The opportunity offered by electronic information sources (in particular the internet) for students to plagiarise and get away with it is of particular concern to teachers. Is the issue of plagiarism as clear cut as it seems and is the same approach adopted by universities to deal with plagiarism the approach that should be taken in secondary schools? Is plagiarism an ethical issue or a learning one? This action research project looks at the approach taken in the author's school to raise staff awareness of the complex issues surrounding plagiarism and to trial learning strategies to minimize the occurrence of plagiarism. The action research project looked specifically at notetaking skills across the curriculum and how teachers can build the teaching of notetaking into their research assignments.
Children's Reading Habits and their Use of the Media
Authors: Weinreich Torben
Published: April 2021

Stories are told in all cultures. And this has been so from the first time humans sought contact with each other. Stories have been a means of creating solidarity and a common context. There are a great variety of genres and forms of expression: myths, fairy tales, and fables. Common to all cultures also is the move from the oral to the written narrative and then later to the modern visual narrative in films, TV, video, and the computer.
Connecting Marketing and Implementation Research and Library Program Development: A Case Study of the Implementation of National [U.S.] Guidelines and Standards
Authors: Haycock Ken , Cavill Pat
Published: April 2021

The American Association of School Librarians developed a detailed plan, with more than 30 specific objectives and more than 75 target audiences, for the implementation of Information Power, the 1998 national guidelines for effective programs. Clear delineation of responsibilities at the national, state, district and school levels was a key part of the plan. Marketing research allowed the Association to increase sources of information for planning and to report that information more clearly and consistently, to reduce error and to manage the Association's marketing program more aggressively. Research from the implementation of change and effective staff development was incorporated in the training for state coordinators. Implementation is now underway with documented achievement of the early objectives.
Images of Poverty in Contemporary Realistic Fiction for Youth: Preliminary Results of a Content Analysis Using a Social Psychological Conceptual Framework
Authors: Fitzgibbons Shirley A. , Tilley Carol L.
Published: April 2021

This preliminary study of 20 contemporary realistic fiction books for youth in middle school and above, analyzed images of poverty using a framework adapted from Leahy (1981, 1983). Findings indicate that, as a whole, the books in this sample rely on concrete images of poverty and do not adequately represent current demographic data for people living in poverty in the United States. The paper concludes with suggestions for how teachers and school librarians/media specialists can use these books with students.
Young People's Reading and Information Use at the End of the Century
Authors: Olën Sandra , Chamberlain Amy , Machet Myrna
Published: April 2021

This paper presents a pilot research project carried out in five schools in a specific district in a province of South Africa, the survey methodology followed, as well as some of the key findings. This survey is based on a similar survey of young people's reading and information use carried out in the United Kingdom in 1995 and 1996. It provides information on young people's reading which is useful for publishers, librarians, writers, illustrators, teachers, and parents.
Assessing Pre-service Teachers' Beliefs About the Role of the Library Media Specialist
Authors: Wolcott Linda L. , Lawless Kimberly A. , Hobbs Deborah
Published: April 2021

The revision of Information Power (1998) focuses on building partnerships for greater student learning. While not a radical departure from the previous edition (1988), the recent document emphasizes both greater collaboration and leadership and increased involvement with the technologies of information and learning. This study set out to determine whether teacher education programs were preparing tomorrow's teachers to expect and accept the redefined role of the school library media specialist. It involved the development and the administration of a scale to assess pre-service teachers' beliefs about the role of the school library media specialist. The results of the pilot study reported here are preliminary but suggest that while pre-service teachers distinguish three distinct sets of functions they place more emphasis on those functions associated with information access and delivery than on those related to learning and teaching. Further, pre-service teachers do not appear to understand the role areas of learning/teaching and program administration.
The Changing Power of Readers in a Time of New Technology
Authors: Mackey Margaret
Published: April 2021

Today's young people are used to moving in a world of multiple media and formats; they take the ability to move from one platform to another completely for granted A qualitative study enlisted a small number of students in fifth and eighth grades (all with a background of domestic computer ownership and use) for intensive work with texts in different media. This report on part of that study demonstrates that those who have grown up with domestic access to video, computers, and the Internet are often relatively neutral when it comes to platform, preferring to judge texts by issues of personal salience and fluency of access.
Evaluating Web Sites: A Critical Information Skill
Authors: Small Ruth V. , Arnone Marilyn P.
Published: April 2021

The evaluation of Web resources has become a critical information skill for students. Because of the uniqueness of these resources, new tools are required that not only assess the content validity and mechanical functionality of a Web site, but also its motivational quality. This paper describes the development and validation of a set of Web evaluation tools (Website Motivational Analysis Checklist: WebMAC), designed for use by students in grades 1-12, that are based on motivation theory and provide multiple feedback mechanisms.
The School Library Web Site: On the Information Highway or Stalled in the Carpark
Authors: Clyde Laurel A.
Published: April 2021

Based on research conducted by the author in 1996 and 1999, this paper discusses theoretical issues and provides an overview of the purposes for which school libraries are creating and maintaining home pages or Web sites. The research has implications for those who are planning a Web page or site for their school library/media center; among other things, it provides information about what other school libraries/media centers have done and suggests some pitfalls that might be avoided It also suggests areas for further study, notably the possible development of a model that might be used for the evaluation of school library Web sites.
A House without Walls: Is Literature Devoid of Values a Literary Possibility?
Authors: Ganz Yaffa
Published: April 2021

The question has been asked: Is there such a thing as literature-adult or juvenile which does not advocate any value system? Is it possible to write something so objective, so nonjudgmental, so free of moral considerations as to be utterly detached from all conventional human beliefs? As a writer, I often wonder: If it were possible to write thusly, what could such literature possibly offer the reader? What relevance could it have for him, for life, for the world we live in? The answers, in my opinion, are an unequivocal "No" to the first question and `"Nothing" to the second.
From Books to the Information Superhighway: Young People's Reading Habits and Internet Use in Iceland
Authors: Hannesdóttir Sigrún Klara
Published: April 2021

In mid January 1997 a telephone survey was canied out on a random sample of 800 Icelandic children ages 10, 12,14 and 16 years of age, 100 girls and 100 boys in each age group. The response rate was 88.5%. The purpose was to examine some factors related to publications for children in the Icelandic language, including books as Christmas gifts, reading habits and Internet use. The majority of children in all age groups received books as Christmas gifts, mostly new publications. Reading is a common pastime among children, mostly among the younger groups. Girls read more than boys in all age groups. CDs are more common than bootes as presents among the 14- and 16-year-olds, but computer games are rare, particulary among girls. The Internet is used more by boys than girls in all age groups but use patterns vary as well as choice of access points.

The author emphasizes the need to use the Internet systematically as a tool in cultural preservation.
Multicultural South African Children's Literature: Reflections of a Changing Society
Authors: Ölen Sandra
Published: April 2021

Twenty multicultural youth novels published in South Africa in English from 1994 to 1997 are analysed to determine how they reflect cultural values and social changes. This period is significant because for the first time a majority govemment is in power and 'apartheid' is being dismantled. The novel deal with topics such as integration in schools and communities, poverty, homelessness, drug and child abuse, crime and violence, illegal immigrants, sexual relationships and different cultural values. Works by African authors reflect township life and raise the issue of the often unquestioning acceptance of many Western cultural values by young Africans.
Challenges in Training Teacher-Librarians at the Department of Information Studies, University of Natal, Pietermaritzburg
Authors: Radebe Thuli
Published: April 2021

The paper raises problems which are experienced by the Department of Information Studies in running the Diploma in School Librarianship (DSL). These problems relate to obstacles which interfere with attracting students into the program and getting them committed to school librarianship as a profession, and also relate to inadequacies which students bring into the program. The problems, which are outlined from observations made by faculty members in the Department, are reinforced by some literature findings. A few solutions, as attempted by the Department, are also discussed.
More than Surviving, Thriving in the Information Age: Reading as a bais for using Information Technology Efficiently
Authors: Royce John
Published: April 2021

Within recent years, computer technology has revolutionized infomation production, in storage, and information retrieval. Information is available in unprecedented quantity, easily and quickly obtained, often inexpensively. The patterns of work are changing; learning how to learn becomes more necessary than ever for survival.

Standard information-handling skills and strategies and a range of technical skills will enhance the chances of success, but reading skills are fundamental. We can learn from the skills exhibited by good readers and good users of infomation; awareness of the habits of poor readers and infomation-users will help us help them cope in an increasingly in-glutted world.
Children's Books for Minorities in Poland
Authors: Zybert Elzbieta Barbara
Published: April 2021

The paper consists of three parts:

Parts one and two analyze and describe the communicative and therapeutic functions that concern children and adolescents in multicultural settings in Poland. Publishing activities of/for ethnic minority groups are presented: books and periodicals specialty addressed to young readers; libraries (both public and those created by national associations) collecting publications and serving ethnic users. The role and situation of ethnic schools and their libraries are also discussed. Part three presents a picture of ethnic and national minorities in Polish literature for children and the youth. Special attention is paid to Gypsies, Germans, and Jews.
Attitudes of Youth Toward Reading Before and After a Motivational Project
Authors: Fitzgibbons Shirley A.
Published: April 2021

As part of an evaluation project assessing the impact of a specific reading motivation program in 30 schools (20 elementary, 10 middle), a longitudinal study of student reading attitudes was conducted using the nationally-tested Elementary Reading Attitude Survey instrument. The instrument tested both attitudes toward recreational reading and school reading. The results have implications for types o reading programs as well as book access and use of libraries.
High School to University: What Skills Do Students Need?
Authors: Daniel Eileen
Published: April 2021

The problem of transferring library and information searching skills from high school to college is not new, but has become intensified in the last decade by the pressures of the information explosion, new technologies and budget reductions. While skills objectives for both high school and first year university are similar, the context and emphasis for the use of these skills differs in several respects. The survival skills students acquire in high school, particularly in the areas of periodical index use and computer search strategies, need to be expanded. Increased communication between high school teacher-librarians and academic librarians is recommended.
The Relationship of School Materials and Resources to Reading Literacy: An International Perspective
Authors: Froese Victor
Published: April 2021

There is great interest in the effect of school resources on academic achievement, but it is seldom that an opportunity arises in which this relationship may be examined in an international milieu. This paper presents the types of resources available in the 27 countries participating in the International Association for the Evaluation of Educational Achievements (IEA) Reading Literacy Study, and explores the relationship of the most pertinent variables to achievement. More particularly, the focus is on school and classroom libraries, their description and use, and on classroom teacher's practices as they relate to library use
Delphi Studies: The Value of Expert Opinion Bridging the Gap - Data to Knowledge
Authors: Wizenried Arthur
Published: April 2021

This paper reports an as yet unfinished Delphi investigation of information management futures. Too often the personal aspect of information provision is overlooked in the light of the dramatic development of technology. However, behind every technological advance there is a provider whose role it is to source, organise and disseminate the information gleaned via that technology. To investigate what is at heart a very subjective situation—an individual’s reaction to a changing work place—the Delphi approach seemed most appropriate. Designed to collect expert opinions as independent, considered views on a commonly debated topic, this method offered structure and validity without a framework too formal to allow for personal, subjective considerations. A Delphi approach provides a unique methodology for studying the trend of future developments. In this particular study it demonstrated a clear perception by senior members of the profession as to the future.
The Information Literacy Movement of the School Library Media Field: A Preliminary Summary of the Research
Authors: Loertscher David V. , Woolls Blanche
Published: April 2021

The authors summarize the proceedings of two major conferences, the Treasure Mountain Research Retreat VI and the International Association School Librarianship conference. In addition, the authors look at the entire history of information literacy and bring together the theory development, the research, and practice in school libraries since the late 1980s. Information literacy and critical thinking ideas from the fields of education, cognitive psychology and educational technology have been included.
Comparison of Functional Regression and Functional Principal Component Regression for Estimating Non-Invasive Blood Glucose Level
Authors: Fadhilah Nurul , Erfiani Erfiani , Indahwati Indahwati
Published: April 2021

The calibration method is an alternative method that can be used to analyze the relationship between invasive and non-invasive blood glucose levels. Calibration modeling generally has a large dimension and contains multicolinearities because usually in functional data the number of independent variables (p) is greater than the number of observations (p>n). Both problems can be overcome using Functional Regression (FR) and Functional Principal Component Regression (FPCR). FPCR is based on Principal Component Analysis (PCA). In FPCR, the data is transformed using a polynomial basis before data reduction. This research tried to model the equations of spectral calibration of voltage value excreted by non-invasive blood glucose level monitoring devices to predict blood glucose using FR and FPCR. This study aimed to determine the best calibration model for measuring non-invasive blood glucose levels with the FR and FPCR. The results of this research showed that the FR model had a bigger coefficient determination (R2) value and lower Root Mean Square Error (RMSE) and Root Mean Square Error Prediction (RMSEP) value than the FPCR model, which was 12.9%, 5.417, and 5.727 respectively. Overall, the calibration modeling with the FR model is the best model for estimate blood glucose level compared to the FPCR model.
Korespondensi Preferensi dan Karakteristik Tipe Wisatawan Grup pada Kawasan Agrowisata
Authors: Kendran Diah Ayu , Kusuma Hanson Endra , Riska Annisa Safira
Published: April 2021

Facility planning will be successful if every process always consider the user and activities aspects. This aspects also applies to the agrotourism area, where tourist preference and segmentation can be used to understand visitor desires. This research  aims to identify preferences and characteristics of the tourist segmentation in the visited agrotourism areas. This research used a grounded theory approach with qualitative exploratory methods. Data was collected online in an open–ended and close–ended questionnaire which was analyzed in 3 steps; open coding, axial coding, and selective coding. Based on the analysis results, tourists’ preference for visiting agrotourism area were to enjoy natural environment and do various recreational activities. The study also found the tourist characteristics was dominated by visitors who come in groups with close relationship of family and friends. The characteristics of these tourists can be used as a basis of harmonisation for determining the criteria of facilities in agrotourism where the implemented design can give attention to the sustainability (lifecycle) of tourist attraction from natural and economic aspect.
Lobster Fishery Connectivity and Management In Indonesia Waters
Authors: Waluyo Waluyo , Arifin Taslim
Published: April 2021

The distribution of lobsters in Indonesian waters is very wide, even lobster species in Indonesia are also scattered in the tropical waters of the western Pacific Ocean, the Indian Ocean, Africa to Japanese waters. Indonesian waters are divided into 11 (eleven) Fishery Management Zone (FMZ). Lobsters in Indonesia may come from various water areas, both national and regional water zones, and they’re called the sink population. Its spread is influenced by the movement of the current. Lobster seed is nurtured by nature through ocean currents from Australia, East Indonesia, Japan, then back to Australia. Lobsters have a complex life cycle, where adult lobsters inhabit coral reefs as a place to lay eggs, then hatch into planktonic larvae, and grow up in open seas and carry out diurnal and ontogenetic vertical migrations before returning to nurseries in shallow coastal areas and reefs, coral, as well as habitat by the type of species. Literature research had used at least two methodologies to estimate the distribution and connection sensitivity matrices of marine organism larvae. The two most common approaches are using genetic markers and numerical biophysical modeling. Thus, this research uses molecular genetic techniques to explain the genetic structure of lobster populations using a biophysical model approach that can explain the genetic structure of lobsters, as well as the distribution based on regional oceanographic synthesis data and lobster biology known in Indonesian waters. This model has four components, namely: 1) a benthic module based on a Geographical Information System (GIS) which is a lobster habitat in the spawning and recruitment process, 2) a physical oceanography module containing daily velocity in the form of a three-dimensional hydrodynamic model, 3) a larva biology module that describes larval life history characteristics, and 4) a Lagrangian Stochastic module that tracks the individual trajectories of larvae.
IDENTIFIKASI MODEL SELF-EXCITING THRESHOLD AUTOREGRESSIVE DENGAN SWITCHING TWO REGIME (KASUS PADA DATA EKSPOR AGRIKULTUR DI INDONESIA)
Authors: Riyansyah Husnun Nur Ghiffari Putri , Saputro Dewi Retno Sari , Winarno Bowo
Published: April 2021

A time series model that explain the structural changes associated with data in a certain time period is the Threshold Autoregressive (TAR) model. The basic of the TAR model there are some different usage regimes in autoregressive analysis. One model based on TAR is a self-exciting threshold autoregressive (SETAR) model with the same delay parameters for each regimen. The SETAR model has a linear nature in each regime but being nonlinear if the models of each regime are combined. In addition, this model can improve jump data that cannot be captured by linear time series models. This means that the SETAR model has high-level parameters through an appropriate switching regime that is applied to agricultural export data in Indonesia. The purpose of this reseach is to test the estimated SETAR parameter model and apply it to Indonesian agricultural export data. There are three methods that can be done for estimating of parameter of SETAR model, namely the conditional quadratic sequential method, ordinary least square (OLS) and nonlinear least square (NLS). In this research, the two stage parameter estimation method is used with OLS and the second stage parameter estimation is used to optimisze the parameter values ​​that are not significant in the model. In its application, the SETAR model (2,1,1) was obtained to model agricultural export data in Indonesia and the MAPE value was 25%.
IDENTIFIKASI PENALARAN ALJABAR MAHASISWA DALAM MENYELESAIKAN MASALAH RELASI REKURSIF MENGGUNAKAN ALAT PERAGA MENARA HANOI DITINJAU DARI GAYA BELAJAR
Authors: Indraswari Nur Fitriyah , Zakiyah Siti
Published: April 2021

This study aims to identify the level of students' algebraic reasoning in solving recursive relation problems using tower hanoi props in terms of learning styles. This research is a descriptive exploratory research with a qualitative approach. The instruments in this study consisted of learning style questionnaires, Mathematics Ability Tests, Problem Solving Tasks, and task-based interviews. The research begins with giving tests of mathematical ability and learning style agket to 8 semester VI students of the STKIP PGRI Sumenep mathematics education study program in Sumenep to obtain three subjects, each with visual, auditory and kinesthetic learning styles with equal mathematical abilities and of the same gender. After that, it was followed by giving problem solving tasks and task-based interviews twice. Time triangulation is used to check the validity of the data. The data analysis technique consists of 5 stages, namely data categorization, data reduction, data presentation, data interpretation, and drawing conclusions. The results show that the visual subject is higher than level 2 but has not reached level 3, the auditory subject is at level 2, and the kinesthetic subject is at level 3. The three subjects have reached the stage of solving the problem, but the one who can solve the problem until they find the final solution is only the kinesthetic subject. The implication of research in learning is that teachers can more easily design learning according to their learning styles so that they can hone students' algebraic reasoning.
Numerical study for reliability assessment of a corroding pipe to flange weld joint over its lifetime
Authors: Nahal Mourad , Lakehal Abdelaziz , Khelif Rabia
Published: April 2021

Numerical model of a corroded weld joint connecting pipe to flange using a finite element method was developed, and coupled with usual stress models. The structure material has been characterized experimentally. Monte Carlo simulations, FORM and SORM methods have been applied for estimating reliability and failure probability under corrosion and residual stress effects. A numerical case with various corrosion rates was conducted to determine the reliability of the welded connection pipe to flange. The obtained results show that the heat affected zone is very sensitive to corrosion effects due to the welding process.
Structure and phase composition of hydroxyapatite plasma coating
Authors:   Baikov Institute of Metallurgy and Material Science RAS, Kalita V. I. , Komlev D. I. ,   Baikov Institute of Metallurgy and Material Science RAS, Radyuk A. A. ,   Baikov Institute of Metallurgy and Material Science RAS, Komlev V. S. ,   Baikov Institute of Metallurgy and Material Science RAS, Shamray V. F. ,   Baikov Institute of Metallurgy and Material Science RAS, Mikhailova A. B. ,   Baikov Institute of Metallurgy and Material Science RAS, Sokolov V. N. ,   M.V. Lomonosov Moscow State University, Chernov M. S. ,   M.V. Lomonosov Moscow State University, Chueva T. R. ,   Baikov Institute of Metallurgy and Material Science RAS, Gamurar N. V. ,   Baikov Institute of Metallurgy and Material Science RAS
Published: April 2021

Changes in the structure, phase composition of the hydroxyapatite (HA) plasma coating were established during deposition at an initial 20 °C and 550 °C temperature of the titanium substrate and a spraying distance of 95 and 150 mm. The structure of HA coatings was analyzed by SEM and optical microscopy. DSC analysis established the transition temperatures of HA coatings to the equilibrium state. When deposited on a substrate with an initial temperature of 20 °C at a deposition distance of 95 mm, a nanostructure with a crystallite size of 21 nm is fixed in the HA coating. With an increase in the deposition distance to 150 mm, the non-equilibrium phase composition increases, the crystallite size decreases to 12 nm, the HA content decreases from 72 to 61 %, TTCP from 10 to 5 %, and the α-TCP content increases from 17 to 30 %. A non-equilibrium nano-structural state passes into a more equilibrium state with the release of heat at temperatures of 615 – 727 °C in DSC studies. The high-temperature α-TCP phase is not fixed when the coating is deposited onto a substrate with an initial temperature of 550 °C at a spraying distance of 95 mm, the content of TTCP increases by 2 times, the size of the HA phase crystallites reaches 36 nm and their size in the sprayed powder is 75 nm. The HA coating has a dendritic microstructure and does not have a thermal effect during DSC heating at an initial substrate temperature of 550 °C.
Modification of the interfacial layer of reinforced polymer composites with nanodispersed silicon dioxide
Authors:   G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Koksharov S. A. , Aleeva S. V. ,   G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Kornilova N. L. ,   Ivanovo State Polytechnical University, Kalinin E. N. ,   Ivanovo State Polytechnical University
Published: April 2021

The behavior of colloidal silicon dioxide in a composition with a styrene / butyl acrylate oligomer, grafted onto a thermoplastic polyamide adhesive to obtain a branched binder structure with penetration of branches into the capillary-pore system of the reinforcing fiber component, was studied. The variants of disaggregation of SiO2 using ultrasonic treatment and mechanical activation with exposure by high shear stresses, ultrasound and cavitation are compared. Methods of dynamic light scattering, IR spectroscopy, thermal analysis, and textile materials science were used to evaluate the elastic-deformation properties of duplicated packets. The set of complementary results confirms that the combined mechanical activation of an aqueous dispersion of oligoacrylate and silica causes the destruction of silica nanospheres and the formation of a hybrid oligolymer-inorganic adduct. In contrast to the short-term effects of ultrasonic dispersion of SiO2, joint mechanical activation of the components solves the problems of preventing aggregation of nanoparticles and uniform distribution of the reinforcing filler in the composite. The effectiveness of using the method for regulating the properties of forming units and parts of sewing products is shown. When selecting oligoacrylate, specific for sewing production separation of the stages of preliminary bonding of materials using thermoplastic adhesive, the creation of a finished product form and its fixing during wet-heat treatment, is taken into account. The preparation of a hybrid adduct of mechanical activation provides an optimal ratio of particle size for rational distribution of fractions in interfacial, interfiber, and intrafiber spaces of the textile web. The shift of the peaks of phase transitions and chemical transformations in a system with nanodispersed SiO2, controlled on DSC thermograms, is consistent with the temperature regimes of successive stages of the technological process. The possibilities of a controlled change in the properties of forming composite materials and a decrease in the material consumption of sewing products by grafting a modified oligoacrylate with a variable content of silicon dioxide are demonstrated.
Hydrogen isotopes interaction with ferritic-martensitic steel Ek-181-Rusfer (review of results obtained)
Authors:   NRC “Kurchatov institute”, Golubeva A. V. , Bobyr N. P. ,   NRC “Kurchatov institute”, Cherkez D. I. ,   NRC “Kurchatov institute”, Gasparyan Yu. M. ,   NRNU MEPhI, Khripunov B. I. ,   NRC “Kurchatov institute”, Klimov N. S. ,   SRC RF TRINITI, Spitsyn A. V. ,   NRC “Kurchatov institute”, Chernov V. M. ,   NRNU MEPhI
Published: April 2021

Ferritic-martensitic steel with rapid decay of activity EK-181 (Rusfer-EK-181, Fe – 12 Cr – 2 W – V – Ta – B) was developed in Russia (A.A. Bochvar Institute) as a structural material for use in the active zones of fast neutron reactors, as well as in thermonuclear and hybrid reactors. The team of authors has been studying various aspects of hydrogen interaction with Rusfer steel for a number of years, primarily retention, diffusion, and the effect of various damages on capture. The paper summarizes the results of the research performed by the authors.
Effect of carbon nanotubes and oxide nanofibers on mechanical properties of aluminum AD0 after cold working and annealing
Authors:   OCSiAl Russia, Alekseev A. V. , Strekalov V. V. ,   OCSiAl Russia, Khasin A. A. ,   OCSiAl Russia, Predtechensky M. R. ,   Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Science,   OCSiAl Russia
Published: April 2021

Cast aluminium composite materials based on AD0 aluminium, reinforced with carbon nanotubes and aluminium oxide nanofibers are obtained. It is shown that the additives of 0.05 wt % of single wall carbon nanotubes (SWCNT) and aluminum oxide nanofibers (AONF) allow increasing ultimate tensile strength of cast metal by 15 % and 16 % respectively. Strengthening of the metal is maintained after cold deformation and annealing. Aluminum AD0 with additives SWCNT or AONF retains high strength after annealing, while aluminum without additives is significantly weakened, this allows to obtain annealed aluminum wire, with a strength limit of 54 – 69 % and yield strength of 53 – 78 % higher than that of metal without additives. The influence of SWCNT and AONF on the size of aluminum grain AD0 in the cast state, after cold deformation and annealing has been studied. Nano-additives have been found to inhibit the growth of metal grains at the stage of collective recrystallization, as well as to influence the process of primary recrystallization of aluminum.
Synthesis of preceramic precursor based on organic aluminum salts for stereolithographic 3D printing of corundum ceramics
Authors:   Lomonosov Moscow State University, Orlov N. K. , Evdokimov P. V. ,   Lomonosov Moscow State University, Milkin P. A. ,   Lomonosov Moscow State University, Tikhonov A. A. ,   Lomonosov Moscow State University, Tikhonova S. A. ,   Lomonosov Moscow State University, Klimashina E. S. ,   Lomonosov Moscow State University, Zuev D. M. ,   Lomonosov Moscow State University, Kapitanova O. O. ,   The Moscow Institute of Physics and Technology, Putlayev V. I. ,   Lomonosov Moscow State University
Published: April 2021

Various options for the synthesis of aluminum acrylates, including substituted hydroxoacrylates, as well as an adduct of aluminum isopropylate with allylamine, have been tested in order to develop a mixture that can be formed by photopolymerization, followed by annealing while maintaining the shape of the ceramics, meaning further molding using stereolithographic 3D printing. By photopolymerization of a polymer precursor based on an acrylate suspension of in situ synthesized alumoxane of the Al(OH)2(ООСН2СН=СН2), corundum ceramics of a given shape were prepared. The inhomogeneity of the polymer precursor is not an obstacle to its use in technology. A significant percentage of weight loss during heat treatment of a polymer precursor suggests its possible use as a binder when filled with dispersed aluminum oxide powder. The strongest shrinkage of a ceramic product occurs in the range of 200 – 400 °C; it is necessary to develop a special program for heating the product to the sintering temperature in order to minimize the consequences of severe shrinkage. When a molded product is heat treated in an inert atmosphere, the shrinkage is less than when annealed in air, since a large amount of amorphous carbon remains during pyrolysis. Annealing such ceramics with amorphous carbon in a nitrogen atmosphere is promising for carrying out the carbonitridization process in the preparation of aluminum nitride and oxynitride.
Investigation of structure and properties of surfaced coatings based on titanium nickelide
Authors:   Togliatti State University, Kovtunov A. I. , Plahotny D. I. ,   Togliatti State University, Semistenova T. V. ,   Togliatti State University, Bochkarev A. G. ,   Togliatti State University, Biryukov R. A. ,   Togliatti State University, Vershinin L. V. ,   Togliatti State University
Published: April 2021

The conditions for formation of coatings based on titanium nickelide under the argon double-arc surfacing of titanium and nickel electrode wires on the titanium samples were shown. Results of evaluating the quality of formation and geometric parameters of the weld at the double-arc surfacing were presented. Relationship between the ratio of feed rates of nickel and titanium wires and chemical composition of the deposited coatings has been established. Investigations of the structure of the surfaced metal at the surfacing modes was carried out. It has been shown that argon double-arc surfacing formed coatings based on the Ti2Ni and TiNi. Mechanical and operational properties of surfaced coatings were studied — hardness, resistance to abrasion and heat resistance at 800 °С. Relative wear resistance of surfaced coatings is higher than that of titanium samples. Dependence of the relative wear resistance of the coatings on the chemical and phase composition was shown. Dependence of heat resistance of the surfaced coatings on the modes of surfacing and the chemical composition of the weld metal is established.
Hepatoprotective and Antioxidant Effects of Aqueous Extract of Rauwolfia vomitoria (Apocynaceae) Stem Bark in Wistar Rats
Authors: Youmbie Djanche Duplex Bonheur , Kada Sanda Antoine , Fotsing David , Essama Mbida Désirée Sandrine
Published: April 2021

Rauwolfia vomitoria is used in Cameroon in indigenous medicine to treat liver diseases. The present study was carried out on the hepatoprotective and antioxidant effects of the plant aqueous extract. Liver toxicity was induced by oral route administration of CCl4 two times per week for four weeks. Rats were given concomitantly by oral route, aqueous extract at the doses of 100, 200 and 300 mg/kg or silymarin four days a week for four weeks. By the end, bloods were collected for liver functional parameters analyses. Liver tissues were removed, to assess to oxidative stress parameters and histological analyses. The extract (300 mg/kg) decreased enzyme activity of ALT, AST and the level of TG with the percentage 54.23%, 49.63% and 28.74% respectively while it increased the enzyme activity of SOD, CAT and level of MDA at about 67.16%, 71.42% and 43.80% respectively compared to control animals. These results suggested that aqueous extract has strong hepatoprotective effect on CCl4-induced liver damage and increase antioxidant defense system activity.