bluuebunny/crossref_metadata_2025 huggingface dataset:
ANALYSIS OF THE VOLUME OF DENTAL ORTHOPEDIC CARE FOR PATIENTS IN THE SYSTEM OF PAID MEDICAL SERVICES
Authors: Markina Larisa , losev Fedor , Grinin Vasily
Published: May 2024

The article is devoted to the analysis of the volume of dental orthopedic care for patients in the system of paid medical services in a multidisciplinary medical organization. Various epidemiological surveys conducted abroad and in our country have revealed an unsatisfactory condition of the organs and tissues of the mouth in the majority of the Russian population. Among dental pathology, tooth loss with subsequent functional disorders occupies a significant place [2–4]. One of the important indicators of dental health of the adult population, characterizing the level of dental care, is to ensure the need for prosthetics.
According to WHO, the main causes of missing teeth are periodontitis and caries. Periodontitis is noted in 75–80% of the population, of which 90% are elderly and senile people. According to A. K. Kuryanov and L. N. Babenko (1988), 75% of 1,000 examined at the age of 60 needed dental prosthetics, and complete loss of teeth in the jaw was detected in 225 cases [1].
An analysis of the volume of dental orthopedic care for patients in the provision of paid medical services in orthopedic dentistry showed that for 5 years, among all manufactured orthopedic structures, removable plate prostheses with partial absence of teeth accounted for the largest volume, single crowns in second place, removable plate prostheses in the third place with complete absence of teeth. For each type of orthopedic structures manufactured, there is a growth trend from 2018 to 2022. There was a slight decrease in the volume of orthopedic dental care in 2020, due to the unfavorable epidemiological situation in the country at that time.
MODERN SCIENTIFIC CONCEPTIONS ABOUT THE FACTORS INFLUENCING THE SUCCESS OF DENTAL IMPLANTATION
Authors: Serebryanyy Sergey , Dymnikov Alexander
Published: May 2024

For the full-fledged work of a dentist-implantologist working in the field of replenishment of dentition with the help of dental implants and prostheses based on them in the modern realities of excessive variability of implant systems and suprastructures for them, the clinician needs to understand the criteria that various structural elements must meet, regardless of whether the structure is a single tooth, a bridge, or a full dentition restored with the above structure. In accordance with modern scientific concepts, the long-term survival of implants and teeth restored with their help is influenced by various mechanical and biological factors, such as: switching platforms, the type of connection of the abutment to the implant body, including the cone, its angle, internal or external polyhedron, the type and shape of the thread, the coating of the screw fixing the superstructure to the shaft of the dental implant (DI), the condition of the soft tissues and other factors disclosed in this article. The article will be useful for dentists involved in the restoration of dentition using various types of prostheses based on DI to become familiar with modern trends and scientifically proven facts about various elements of the implant-prosthesis complex. The article will also be useful for the clinician to select an implantological system that meets modern criteria of reliability and efficiency among the many variations presented on the medical device market. The team of authors recommends that the article be read by senior students and residents studying at the dental faculties of medical universities for a deeper understanding of the conditions that in the near future they will have to take into account when following the path of an orthopedic dentist or dental surgeon.
ROLE OF MOLECULAR GENETIC RESEARCH METHODS IN THE ETIOPATHOGENESIS OF OSTEOMYELITIS OF THE JAWS
Authors: Fayzullina Guzel , Mirsaeva Faniya
Published: May 2024

The subject of the study is the importance of molecular genetic research methods in the study of the etiopathogenesis of osteomyelitis of the jaws.
The purpose of the work is to provide up-to-date information to researchers, dental surgeons, and maxillofacial surgeons on the possibilities of molecular genetic research in identifying bacterial pathogens in osteomyelitis of the jaws, as well as to reflect genetic markers of pathogenicity factors for a number of the main causative agents of the disease.
Methodology. International scientific databases PubMed, ScienceDirect, Scopus, Cochrane Collaboration, Elsevier, as well as electronic catalogs eLIBRARY.RU and CyberLeninka.ru were used.
Results. A review of publications demonstrated that S. aureus and S. Epidermidis dominate the etiological spectrum of causative agents of bone tissue infections. The participation of these microorganisms is determined by a whole range of pathogenicity factors. Toxins and Panton-Valentine leukocidin (PVL) genes play a major role in the pathogenesis of osteomyelitis and disease progression. It has been shown that the pathogenic bacteria Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans are capable of inducing differentiated production of cytokines. The most attention has been attracted to E. faecium, which exhibits multidrug resistance to a wide range of antibiotics. The proportion of infections mediated by S. epidermidis and S. Saprophyticus is, on average, about 25% of cases. The proportion of representatives of gram-negative flora Escherichia, Klebsiella, Enterobacter, Citrobacter, Proteus, Providencia, Serratia reaches 23% of cases. Pathogenic nosocomial strains of P. aeruginosa are also involved in the formation of chronic inflammation in osteomyelitis. According to the results of published studies, more than a third of cases of chronic osteomyelitis are mediated by microbial associations, which are dominated by S. aureus, S. epidermidis and, less commonly, E. faecalis.
Conclusions. The use of PCR analysis to identify the causative agents of osteomyelitis and gene amplification using specific primers has a huge advantage over routine microbiological tests, being an informative method for studying the pathogenicity factors of the main pathogens. The high importance of molecular genetic methods in the study of the etiopathogenesis of osteomyelitis of the jaws requires their widespread use in the clinic of surgical dentistry and maxillofacial surgery to successfully solve complex problems in the rehabilitation of patients with this disease.
THE USE OF METALLOPROTEINASE INHIBITORS IN DENTISTRY. TREATMENT OF INFLAMMATORY PERIODONTAL DISEASES USING PROTEOLYTIC ENZYME INHIBITORS
Authors: Allush Natalia , Muchamedzhanova Lubov
Published: May 2024

Periodontitis is the most common inflammatory disease that leads to the destruction of the supporting tissues of the tooth. Therapeutic treatments aimed at reducing the effects of matrix metalloproteinases (MMPs) may be an effective adjunct to the treatment of periodontitis. The review examines the role of proteolytic enzyme inhibitors in the treatment of inflammatory periodontal diseases. General information about the ability of tetracyclines to inhibit MMPs is discussed.
The purpose of the study was to examine the use of MMP inhibitors as a treatment for periodontal disease.
Material and research methods. A scientific review of studies was carried out in Russian and English using information portals and platforms eLIBRARY.ru, Web of Science, PubMed and Scopus. The search was carried out using the following keywords: matrix metalloproteinases; oral diseases; tissue inhibitors of metalloproteinases. Of the 55 initially identified articles, after the initial analysis, 19 publications devoted to the study of MMP inhibitors associated with periodontal diseases were selected.
Results of the study. Analysis of the literature allows us to conclude that the elimination of local irritants of periodontal tissues, the use of a therapeutic and prophylactic complex of measures using MMP inhibitors will have an advantage over traditional methods of treatment, will contribute to longer remission and prevent the progression of the inflammatory process in periodontal tissues, positively influence its course and reduce treatment time. The use of metalloproteinase inhibitors is an effective therapeutic strategy in the treatment of periodontal diseases.
Conclusions. The therapeutic potential of metalloproteinase inhibitors may help prevent tissue damage in inflammatory periodontal diseases.
QUANTITATIVE AND QUALITATIVE CHARACTERISTICS OF THE CRYSTAL STRUCTURE OF HUMAN ORAL FLUID USING THE THEORY OF FRACTALS. PART I
Authors: Simonyan Laura , Lomiashvili Larisa , Stafeev Andrey , Chekina Anna , Sedelnikov Vladimir , Yudina Maria , Simonyan Edgar
Published: May 2024

The subject of the study is a dried drop of human oral fluid (facies).
The goal is to propose a method for quantitative characteristic for the crystalline structure of oral fluid using fractal theory.
The task is to create a computer program to calculate the fractal dimension, the area of crystals; length and width of the axes of mixed human saliva crystals.
Methodology. To create a computer program for quantitative description of the crystalline structure of the oral fluid facies. The program was created within the framework of cooperation between Omsk State Medical University and Omsk State Technical University. The program, called FracSquare, was developed using the Python programming language version 3.1 and the built-in libraries math, cv2 and plt, which implement algorithms for finding the Minkowski fractal dimension, searching and counting pixels located inside the desired object, as well as an algorithm for finding the hypotenuse. After installing on the computer and launching the program, you need to load a photo of the saliva facies and calculate the fractal dimension and crystal area by pressing the appropriate buttons; the result will appear on the screen in the form of numerical values.
Results. The computer program FracSquare allows you to mathematically calculate the fractal dimension, the area of crystals, and also measure the length and width of the branches of human saliva crystals. These digital values provide a quantitative characterization of the crystalline pattern of the saliva facies.
Conclusion. The operator receives accurate digital values using a developed computer program, on its basis he can objectively evaluate the microcrystalline pattern of the facies of human saliva in order to identify pathological processes occurring in the body. The indicator of these processes is oral fluid.
Research on Factors Affecting the E-Entrepreneuship Intention of Generation Z in Vietnam
Authors: Hoang Thanh Tung , Ha Thy Phan
Published: May 2024

To investigate the factors influencing the entrepreneurship intention of generation Z youths in Vietnam, the research team utilized a quantitative research method which base on data from a survey of 353 Vietnamese youths, of which 311 were either currently involved in entrepreneurship, preparing for entrepreneurship, or intending to engage in entrepreneurship. Using the SMARTPLS software, the study found that, with a confidence level of 95%, “Perceived behavioral control” (PBC) had the strongest impact on the e-entrepreneurship intention of Vietnamese generationZ, with an influence level of 0.439. Following this, the “Social influence” (SIN) factor demonstrated a significant impact of 0.224. At a confidence level of 90%, the “Expectation of success” (EXSU) factor showed an influence of 0.126, while the “Attitude towards E- entrepreneurship” (ATTE) factor exhibited an influence of 0.089. Additionally, the “Entrepreneurship education” (EDED) and “Entrepreneurship competence” (ENTC) factors did not yield statistically significant results regarding their influence on the dependent variable, “E-entrepreneurship iIntention of Vietnamese generation Z” (EEINT). Based on research results, the research team proposed discussions aimed at promoting and supporting youths to enhance the effectiveness of their electronic entrepreneurship projects
Examination of Digitalized Non-Heritage Apparel Design Using CLO3D: Case Study of Ningbo Gold and Silver Color Embroidery
Authors: Zhao Shutan , Li Ruotong , Xu Shiyi , Chen Jiaqi , Wang Shihuai
Published: May 2024

Driven by the wave of digitalization and fashion, traditional handicrafts in intangible cultural heritage (ICH) have experienced a remarkable transformation in the existing social value coordinate system. On the one hand, as a key carrier of the historical and cultural memory of the nation and the state, intangible cultural heritage is faced with many challenges of preservation and inheritance; on the other hand, the rapid development of digital technology provides innovative solutions for the modernization of traditional arts. This paper uses Ningbo gold, silver and color embroidery as a case study to explore the application of CLO3D software technology in the design of nonheritage apparel products and shows nonheritage crafts through digital simulation technology, which is not only the future development direction of the apparel industry but also the reconstruction of the apparel form and the use of function, aiming to assess its impact on nonheritage protection and innovation and to find a new path for the digital inheritance of nonheritage.
IMPLEMENTASI MANAJEMEN PERUBAHAN DI MAN 3 PALEMBANG SUMATERA SELATAN
Authors: Afriantoni Afriantoni
Published: May 2024

Madrasah Aliyah Negeri (MAN) 3 Palembang is unique enough to be studied because since inception of Islamic religion teacher education institutions. The results of this study found that type of leadership visoner is owned by head of Man 3 Palembang oriented management of change and continues over time. Visionary leadership is the key. Head of MAN 3 Palembang has been able to create, formulate, communicate, socialize, transform, and implement the ideal thoughts coming from him and the result of social interaction between members of organization and stakeholders that are believed to achieve ideals of organization in the future. In addition, management of change has been initiated through an internal analysis of the organization by identifying four areas, namely services, finance, human resources and facilities in order to discover the strengths and weaknesses internal to the organization. All of this has been the commitment of all personnel MAN 3 Palembang to achieve my goals and success. Lastly, head of MAN 3 Palembang has been able to implement management changes, so that the organization built quality improvement-oriented leadership, teacher quality, school programs, students' final exam results, student achievement and strong school culture.
Looking at the Link between Thinking Styles and Academic Achievement: The Case of One State Islamic University in Palembang
Authors: WARSITI EKA SRI
Published: May 2024

The aims of this study were (1) to find out whether or not there was a significant correlation between each type of thinking styles and students’ academic achievement, (2) to identify if thinking styles significantly contributed to students’ academic achievement, and (3) to find out type of thinking styles becoming the best predictor for the academic achievement of one State Islamic University in Palembang. In this study, 460 EFL students of one State Islamic University in the academic year of 2016-2017 became the population of this study. 88 students were taken as samples by using purposive sampling method. The method used in this study was a correlational study. The data were obtained by using a ready-made questionnaire and documentation. Pearson Product Moment correlation coefficient and regression analysis of SPSS version 21.0 were used to analyze the obtained data. The results of the two analyses showed that (1) out of 13 types of thinking styles, only 9 types of thinking had positive and significant correlation to the students’ academic achievement; (2) those 9 types of thinking styles contributed to the students’ academic achievement with 48.8% contribution; and (3) hierarchical thinking style was the best predictor and contributed to the students’ academic achievement with 29.8% contribution.
Students’ English Proficiency: The Case of One Madrasah in Jambi City
Authors: SURYANI HILMA , AMALIA SHYNTA
Published: May 2024

This present study aimed to find out the senior high school students’ English proficiency. The study employed descriptive quantitative design. It took place at Madrasah Aliyah Labor Kota Jambi. There were 104 students of Madrasah Aliyah Labor purposefully selected in the study. The data were collected through English proficiency test for basic users namely Key English Test (KET). Descriptive statistics was employed to analyze the data. The result of this study revealed that four students (3.8%) were categorized as beginners (level A1) while the rest (96.2%) were not included in the entry level of Common European of Reference for Languages (CEFR) as their scores were lower than those of the beginner level. Moreover, based on the result of reading and writing test in KET analyzed by using the criteria used at school, the students scored low in both sessions.
Students’ Performance in the Indonesian National Examination and Career Choice among the First Year Students in Non-Religious Affiliated Universities
Authors: FITRIANI SUCI , IBARRA FLORANTE P
Published: May 2024

This research study investigated the role of the four components of the Indonesian National Examination to students’ career choice. Around 310 respondents participated in the study using their overall scores in the National Examination. Anchored in Holland’s (1997) RIASEC Theory, a quantitative method was employed to gather data using a research instrument tool. Analysis of data included descriptive statistics and Spearman’s product moment correlation using Statistical Package for Social Science (SPSS) version 20. Findings of the study revealed that there was significant difference in the national examination between high and low performing students and their career choice and there was a significant relationship between socio-demographic profile, four components of Indonesian National Examination and Indonesian students’ career choice. Results mostly suggest that students with high scores in the National examination tend to choose numeric courses in academics.
Reducing Economics Test Anxiety among Students as Measured by a Test Anxiety Scale: A Cognitive Behavioural Therapy
Authors: Amedu Amos Nnaemeka
Published: May 2024

Psychological problems such as anxiety have been reported to adversely affect students' learning outcomes.  This study explored the effectiveness of cognitive therapy with reflective activities on reducing Economics test anxiety among secondary school students. A randomizedcontrolledtrial experimental design was used. The sample sizewas120 senior secondary school students in South East Nigeria.A questionnaire titled "test anxiety scale" was used to collect data. It contained a demographic section and 20 items.To assign subjects to treatment or control groups, a randomization process was used.Subjectsin the treatmentgroup were subjectedto a cognitivebehavioural therapy (CBT) program.A three-time point evaluation was conducted with subjects in the treatment and control groups.Repeated measures and data collected were analysed with ANOVA. In comparison with the control group, research subjects exposed to CBT reportedlower testanxiety. In addition, at the follow-upmeasure, the scoresof researchsubjectsin the CBT groups weresignificantly lowerthan those of the control group. Hence,CBT significantly reducedEconomics students’ test anxiety. Theresearchers concludedthat the CBTprogramreducesEconomics students' test anxiety.
How to Control Children's Consumption Behavior?
Authors: Sa'adah Silky Roudhotus , Najib M. Thoha Ainun
Published: May 2024

This study aims to find out how parents internalize the control of consumption behavior of elementary school age children (7 -12 years). This research uses qualitative research with exploratory descriptive approach. Participants in this study were 200 elementary school students aged 7-12 years. Data was collected through interview, observation, and documentation techniques and analyzed. The results showed that the internalization of wise consumption as a control of children's consumption behavior was carried out by 1) Habitating relevant actions, 2) Introducing money from an early age, 3) Providing verbal explanations to children, 4) Giving direct examples to children, 5) Teaching manage finances to children from an early age, 6) Teach children about rationality in consumption, 7) Children are taught how to make economic decisions, 8) Give children confidence in financial management, 9) Discuss the use of money between children and parents, 10) Familiarize children to live economically from an early age, 11) Teach children to save.
DESAFIOS E POSSIBILIDADES DA EDUCAÇÃO SUPERIOR NA CONTEMPORANEIDADE:
Authors: Rodrigues Silva Andreace Alice , Santos Alanna Oliveira Santos , Moreira Danrlei de Oliveira , Conceição Felipe Ramos
Published: May 2024

O presente artigo objetiva analisar a experiência do projeto “Rap Lab” como atividade de extensão universitária e a importância da curricularização da extensão frente aos desafios educacionais e sociais da contemporaneidade.
ETNOCONHECIMENTO EM EDUCAÇÃO DO CAMPO NA PERSPECTIVA DO ENSINO E APRENDIZAGEM DE ESTUDANTES CAMPESINOS
Authors: Ferreira de Sousa Hugo Junio , De Pinho Maria José
Published: May 2024

O artigo aqui apresentado, aborda uma discussão em relação ao Etnoconhecimento (saberes, tradições e culturas, passadas de geração a geração em comunidades tradicionais) e a Educação do Campo no âmbito do ensino e aprendizagem de estudantes campesinos. Logo, buscou-se fundamentar-se em bases teóricas por meio de estudiosos como: Miranda (2007), Nascimento (2013) e, de Rocha (2014); Arroyo, Caldart, Molina (1998), dentre outros que foram fundamentais na discussão deste trabalho. Assim, fundamentou-se um estudo de abordagem qualitativa, sendo de natureza aplicada e foi possível por meio da pesquisa exploratória, descritiva, bibliográfica e documental. Contudo, a partir dos diálogos apresentado aqui, foi possível relacionar o Etnoconhecimento na perspectiva da Educação do Campo em escolas do meio rural, no propósito de fomentar o ensino e aprendizagem a partir das vivências de estudantes campesinos em sua própria localidade.
MEMÓRIAS DE BRINCADEIRAS DE PESSOAS IDOSAS DA UNIVERSIDADE DA MATURIDADE, DA UNIVERSIDADE FEDERAL DO TOCANTINS (UMA/UFT)
Authors: Pereira Brito Oliveira Nubia , Santana dos Santos Jocyléia , Barbosa Osório Neila , Sinésio Silva Neto Luiz , Santos de Oliveira Brito Marlon , Afonso Nunes Filho Fernando
Published: May 2024

O trabalho colabora com a educação inclusiva, equitativa e de qualidade, ao  descrever memórias de aprendizagem ao longo da vida de velhos que estudam na Universidade da Maturidade, da Universidade Federal do Tocantins (UMA/UFT). A História Oral é a principal metodologia, segue uma abordagem qualitativa, que conduz a resultados, com depoimentos de velhos sobre brincadeiras e interações com crianças durante a construção de brinquedos com resíduos sólidos. Neste caminho percebemos aprendizagens relevantes e eficazes, com aceite as diferenças e combate a preconceitos, por meio de práticas educativas intergeracionais. Portanto, o artigo auxilia na compreensão de memórias subjetivas de velhos em ações educativas interinstitucionais.
EXTENSÃO UNIVERSITÁRIA EM UMA COMUNIDADE QUILOMBOLA: DIÁLOGOS INTERCULTURAIS PARA UMA EDUCAÇÃO ANTIRRACISTA E DECOLONIAL
Authors: Finder Machado Diego , Souza Sirlei de
Published: May 2024

Este artigo tem por objetivo discutir as ações de um projeto integrado de ensino, pesquisa e extensão desenvolvidas com a comunidade remanescente quilombola Beco do Caminho Curto pela Universidade da Região de Joinville. O projeto, iniciado em 2018, envolve a colaboração de professores e estudantes que atuam em diferentes cursos de graduação e pós-graduação da universidade. Busca-se problematizar os desafios de se promover uma educação antirracista e decolonial, tendo como referência basilar as travessias de saberes, em via de mão dupla, entre a universidade e a comunidade em que ela está inserida. As diversas ações do projeto, visando a curricularização da extensão em cursos de graduação, têm contribuído para a decolonização dos currículos acadêmicos.
PROJETO CRESCENDO SEM CÁRIE: EDUCAÇÃO EM SAÚDE BUCAL EM CRECHES PÚBLICAS MUNICIPAIS DE MANAUS - RELATO DE EXPERIÊNCIA
Authors: Cosme Keven de Oliveira , Da Silva Carla Rafaela Gomes , Dantas Marcela Kauanna Nogueira , Sena Vitória Monteiro de , Silva Sabrina Bezerra da , Pereira Tânia Cristine Libório , Aguiar Eduarda Cândida Gomes , Aranha Lauramaris de Arruda Regis , Monteiro Ângela Xavier , Pinto Adriana Beatriz Silveira , Passos Shirley Maria de Araújo
Published: May 2024

Este estudo descreve as ações do projeto crescendo sem cárie, que tem como objetivo principal promover a saúde bucal com educação em saúde e escovação dental supervisionada em crianças matriculadas em creches públicas no município de Manaus-AM. Com a realização da promoção da saúde bucal nas creches públicas de Manaus. Realizou-se atividades educativas, escovação dental supervisionada e rodas de conversa, sendo as crianças, pais ou responsáveis e os profissionais das creches os públicos-alvo, visando desenvolver hábitos e alimentação saudáveis, que contribuam para a redução dos problemas de saúde bucal e melhoria da qualidade de vida das crianças. O projeto buscou melhorar a saúde bucal das crianças e qualidade de vida.
PESQUISA E EXTENSÃO NO ENFRENTAMENTO À VIOLÊNCIA SEXUAL
Authors: Oliveira Marcio de , Trindade de Matos Rosana , Carvalho Campinas Carla Letícia
Published: May 2024

Este texto disserta sobre as experiências, os aprendizados e as reflexões engendrados no projeto de extensão “Prodeca faz bonito: Oficinas de Combate ao Abuso e à Exploração Sexual de Crianças e Adolescentes”. Apresentamos o referido projeto, além de traçar breve discussão em torno das violências perpetradas contra crianças e adolescentes. Como resultados, salientamos que projetos como esse são essenciais para coibir, prevenir e identificar violências contra esses sujeitos vulneráveis, buscando potencializar as ações considerando o aumento das violências contra crianças e adolescentes que ocorrem, em sua maioria, no ambiente familiar. Junto a isso, é necessário que a rede de proteção do Estado seja fortalecida, com apoio financeiro e institucional.
PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO À DOCÊNCIA: UMA EXPERIÊNCIA FUNDAMENTADA NA PEDAGOGIA HISTÓRICO-CRÍTICA
Authors: Marinho de Sousa Joana , Barbosa Vieira Alaize , Lima Layanna Giordana Bernardo
Published: May 2024

O Programa Institucional de Bolsas de Iniciação à Docência (PIBID) proporcionou uma experiência essencial na formação dos discentes de graduação do curso de Licenciatura em Pedagogia, pois possibilitou espaço de vivência em sala de aula e o acompanhamento do processo de ensino-aprendizagem e desenvolvimento das crianças que participaram das atividades planejadas. O planejamento e as atividades realizadas foram fundamentados na perspectiva da Pedagogia Histórico-Crítica. Nesse contexto percebeu-se a importância do planejamento e da formação continuada, sendo uma forma imprescindível de acompanhar as mudanças da sociedade e o processo dialético do contexto social em que as crianças estão inseridas. Portanto, as atividades de formação e de planejamento do programa possibilitaram aos estudantes de Pedagogia, bolsistas acesso a novos conhecimentos científicos e articulação da teoria e prática.
Increasing Teacher Competency using the contextual inquiry Learning Model through In-House Training at SD Negeri 1 Giripurwo Kapanewon Girimulyo Kulon Progo Regency Academic Year 2022/2023
Authors: Yunarti Farida Endang
Published: May 2024

This research aims to determine teachers' activities and abilities in implementing the Contextual Inquiry Learning, as well as researchers' abilities in managing IHT. School Action Research was carried out at SD Negeri 1 Giripurwo Kapanewon Girimuyo Kulon Progo Regency for the 2022-2023 Academic Year in three cycles consisting of 2 meetings in each cycle, the procedures in this research include planning, implementation/action, observation and reflection . The subjects of this research were 8 people consisting of 6 class teachers and 2 subject teachers. Qualitative data was collected in the form of active observations and the application of the "Contextual Inquiry Learning" learning model, and the researcher's assessment sheet for managing IHT. The research results relate to participant activity, the application of the "Contextual Inquiry Learning" learning model, as well as the management of IHT by researchers. The results of the activities of the first cycle participants at the 1st meeting obtained an average score of 2.56 with a percentage of 79.31%, at the 2nd meeting the average score was 3.40 with a percentage of 85.07%. Furthermore, the results of cycle II of the 1st meeting averaged a score of 3.63 with a percentage of 90.63%, at the 2nd meeting the average score was 3.81 with a percentage of 95.14%. Then, in the application of the learning model for cycles I and II, namely 1. Preparation of syntax/phases, an average score of 91.41% was obtained; Preparation of learning model steps had an average score of 91.15%, 2. Preparation of lesson plans was obtained based on an average of 91.96%, and 3. Teaching practice was 91.25%, while in the IHT Management cycle I, the 1st meeting was obtained an average -average score 3.40 with a percentage of 84.38%, at the 2nd meeting an average score of 3.60 was obtained with a percentage of 89.38%. Next, cycle II, 1st meeting. average score 3.73; percentage 92.81%; Following is the 2nd meeting; average score 3.81; percentage 95.31%; The results of the research concluded that each meeting in cycle I and cycle II had achieved improvement and had met the research success indicator of 85%.
Increasing Teacher Capacity Using the Index Card Match Type Active Learning Model Through Continuous Mentoring at SD Negeri 1 Samigaluh, Kapanewon Samigaluh Academic Year 2022/2023
Authors: Sumadi Sumadi
Published: May 2024

The School Action Research aims to improve teachers' abilities in using the card match index type learning model through continuous mentoring at SD Negeri 1 Samigaluh for the 2022/2023 school year. This type of school action research is carried out in 2 cycles, where each cycle consists of 2 meetings each. The implementation steps use research methods/procedures, which are carried out based on the planning, implementation, observation and reflection stages. The research subjects were 8 teachers at SD Negeri 1 Samigaluh, Kapanewon Samigaluh, Kulon Progo Regency for the 2022/2023 academic year, consisting of class teachers and mapel teachers. The research object is about using the card match index type learning model. Results of action research on sustainable mentoring schools using the card match index type active learning model. shows that through mentoring it can be proven by increasing observation results at each meeting. The results of the research can be stated that the activeness of mentoring participants in participating in all physical and non-physical activities of participants in the process of mentoring activities is optimal so that it can create a conducive atmosphere and can increase activeness in participating in mentoring using the card match index type active learning model at SD Negeri 1 Samigaluh Kapanewon Samigaluh Kulon Progo Regency.
The Implementation of Industrial Work Culture as an Effort to Educate Students' Character in Qualitative Analysis Practical Learning for Grade XI of Analytical Chemistry Department at SMTI Yogyakarta Vocational School
Authors: Quari Triana Quari Sedyasthi
Published: May 2024

This research aims to implement industrial work culture as an effort to educate students' character in practical learning of Qualitative Analysis for grade XI of Analytical Chemistry Department at SMTI Yogyakarta Vocational School. The research was carried out with a qualitative approach to survey results for students after completing the learning process with a block system lesson schedule, where students must comply with rules or regulations that instill discipline, responsibility and tough character. Students are required to submit practical reports within a certain time limit. The subjects in this research were eleventh-grade students of Analytical Chemistry Department at SMTI Yogyakarta Vocational School, totaling 32 students. The data were analyzed descriptively and present in tabular form. The results of the research showed that the majority agreed with the statements in the questionnaire given, where in the results of the evaluation survey of the block system learning schedule, 68.75% agreed that practical learning with the block system could improve student discipline and 31.25% strongly agreed. 59.38% agreed that practical learning with the block system could increase student’s endurance (physical and mental endurance) and 34.38% strongly agreed. 50.00% agreed that practical learning with the block system could train students to manage time and 43.75% strongly agreed. 46.88% agreed that practical learning with the block system could increase student learning motivation and 21.88% strongly agreed. 65.63% agreed that practical learning with the block system could further facilitate student’s level of understanding and 15.63% strongly agreed. Meanwhile, in the survey results regarding the rules for collecting practice reports with a certain time limit, 56.25% agreed that collecting practice reports with a certain time limit could improve student discipline and 31.25% strongly agreed. 59.38% agreed that collecting practice reports with a certain time limit could increase student’s endurance (physical and mental endurance) and 34.38% strongly agreed. 59.38% agreed that practical learning with the block system could train students to manage time and 28.13% strongly agreed. 46.88% agreed that practical learning with the block system could increase student learning motivation and 21.88% strongly agreed. Therefore, it can be concluded that the implementation of industrial work culture in the practical learning for grade XI of Analytical Chemistry Department at SMK-SMTI Yogyakarta Vocational School can be a character education effort, which is supported by the survey results, where the majority agreed with the statements in the questionnaire given to student representatives who were the objects of research
Increasing the Effectiveness of the Implementation of the Green School Program in the Context of Instilling Environmentally Caring Character Values for Teachers at SD Negeri Candirejo Through the Mentoring Program for the 2022/2023 Academic Year
Authors: Paryati Paryati
Published: May 2024

This research aims to increase the effectiveness of implementing the Green School program in order to instill environmentally caring character values for teachers at SD Negeri Candirejo through a mentoring program for the 2022/2023 academic year. The research is expected to provide benefits to the school, teachers and students. Research is expected to be able to develop and expand the school's repertoire. Teachers can use the environment as a learning resource in accordance with the material being taught and students are expected to become more actively involved in the Green School program. This school action research is designed with a mentoring model using classroom action research procedures which are arranged according to the stages of planning, implementation, observation and reflection. The research was carried out in 2 cycles, namely cycles I and II with collaborative techniques from colleagues who assisted in observations. The research subjects were SD Negeri Candirejo teachers for the 20222/023 academic year, consisting of 10 teachers. Data collection techniques were carried out using observation and assessment methods. The research results were obtained based on observation and assessment using observation and assessment instruments.
Special Issue on Advanced Metal Cutting Technologies
Authors: Sasahara Hiroyuki , Matsumura Takashi
Published: May 2024

Cutting technologies are utilized in many industrial sectors, such as automobile, aircraft, and medical-device manufacturing as well as dies and molds. Thus, the requirements for higher geometric accuracy, better surface integrity, and longer component service lifetimes have substantially increased. In addition, maintaining high machining efficiency while simultaneously reducing power consumption and CO2 emissions during machining is important for sustainable development.

This special issue features 11 papers on the most recent advances in cutting technologies for metals and composite materials.

- Reverse finishing characteristics of drilling surfaces

- Machining error simulation for end milling

- Visualization of cutting phenomena using a single-crystal diamond tool

- Milling of TiB2 particle-reinforced high-modulus steel

- Electrodischarge-assisted turning of carbon fiber-reinforced polymers

- Suppression of chatter vibration during double-insert turning

- Prediction of surface roughness components during turning

- Microtome blades for high-precision tissue sectioning

- Boiling of coolant near the cutting edge in high-speed machining

- Residual stress during drilling of aluminum alloy

- Effect of strain hardening on burr control during drilling

This issue provides an understanding of recent developments in cutting technologies, aiming to inspire further research in this field.

We deeply appreciate the careful work of all the authors and thank the reviewers for their diligent efforts.
Development of Machining Device with Real-Time Visualization of Boundary Surface on Tool Rake Face and Cutting Chip
Authors: Hagino Masahiro
Published: May 2024

Analysis of cutting phenomena has been conducted for a long time and many researchers have elucidated the phenomena that may occur at the cutting-edge during machining; for example, built-up edges and welding phenomena on cutting edge. However, the existing research has focused on observing the tool and chips after machining, when the tool and work material have been cooled, and are under atmospheric pressure. Therefore, we consider that it is different from the phenomenon that occurs during cutting. Because the cutting edge of a tool is in a high-temperature and high-pressure environment during machining and is released from such an environment after machining, the cutting edge must be visualized to discuss the actual cutting phenomena. There have been research reports in the past that have visualized the backside of cutting chips; however, that experiment was far from actual cutting phenomena and was conducted at significantly low cutting speed. Thus, the visualization of the cutting phenomenon is physically extremely difficult at the cutting edge. Under such circumstances, this study developed a device that observed the behavior of the boundary surface between cutting chips and the rake face in real time from the backside of the rake face during machining. By using the developed device, we could visualize this phenomenon to acquire the data directly and visually, which can otherwise be grasped only indirectly. In this device, a camera was mounted on a tool holder, and a cutting tip made of a transparent material was used to observe rake face, cutting edge, and flank face which can be visualized during machining from the backside of the rake face within one field of view. This paper reports on the outline of the developed device, its method, and the results of experimental observation of the state of two-dimensional cutting using a lathe.
Electrical Discharge-Assisted Turning for UD CFRP Under Low Voltage Condition
Authors: Tanaka Hidetake , Kuboshima Ryuta
Published: May 2024

The demand for carbon fiber reinforced plastics (CFRP), classified as functional resins, has increased for micromachined products that are manufactured using lathes and used in the medical field. However, the problems with machining CFRP include the occurrence of burrs and deterioration of the finished dimensions owing to the significant tool wear caused by the carbon fiber. To turn CFRP and maintain high dimensional accuracy, the authors proposed a novel combination of conventional turning and electrical discharge-assisted turning (EDAT). In this study, the capability to control the machinability of EDAT under low-voltage conditions was experimentally investigated. The relationship between the discharge voltage, frequency, and depth of discharge influence of the carbon fibers was clarified.
Evaluation Approach for Residual Stress in Drilling of Aluminum Alloy
Authors: Matsumura Takashi , Akao Yusuke , Tamura Shoichi
Published: May 2024

Residual stress is one of the critical evaluation factors as well as machining accuracy and surface finish in cutting. From the perspective of the fastening strength of parts, residual stress in drilling has an influence on the product or part life. Especially in the aircraft manufacturing, the tensile residual stress is crucial as it can cause major accidents. However, few studies have focused on residual stress in drilling so far. Most of them investigated the characteristics of residual stress based on the experimental data. This paper discusses residual stress in drilling in terms of its mechanical effect. The residual stresses in the inner surfaces of holes were measured in the depth direction from the top of the plate. The change in the residual stress has good correlation with the chip flow direction and the load applied to the inner surface, which acts as a counter force to the cutting force near the outermost ends of the lips. The cutting force is determined using an analytical model based on the minimum cutting energy. The correlation between the residual stress and the direction of the load applied to the inner surface depends on the margin width and back taper on the peripheral sides of a drill. The effect of the margin contact on the residual stress is characterized by linear regression analysis. Finally, an analysis-neural network hybrid system was developed to estimate the residual stresses in drilling. In the system, the mechanical effects of the drilling process, which are the magnitude and direction of the load applied to the inner surface, are obtained through analytical simulation. Meanwhile, the margin effects are expressed as the coefficients in the linear functions, which are associated with the margin width and back taper angle by a neural network. Then, another neural network, working as a post process, estimates the residual stresses using the information of mechanical and margin effects. The developed system is validated by presenting a comparison between the estimated and the actual residual stresses.
Improving Machined Accuracy Under a Constant Feed Speed Vector at the End-Milling Point by Estimating Machining Force in Tool Approach
Authors: Suzuki Takamaru , Hirogaki Toshiki , Aoyama Eiichi
Published: May 2024

A five-axis machining center (5MC) is capable of synchronous control, which makes it a feasible tool for quickly and accurately machining complicated three-dimensional surfaces, such as propellers and hypoid gears. Recently, the necessity of improving both the machined shape accuracy and the machined surface roughness of free-form surfaces is growing. Therefore, in our previous study, we aimed to maintain the feed speed vector at the end-milling point by controlling two linear axes and a rotary axis of the 5MC to improve the quality of the machined surface. Additionally, we developed a method for maintaining the feed speed vector at the end-milling point by controlling the three axes of the 5MC to reduce the shape error of the machined workpieces (referred to as the shape error herein), considering the approach path of the tool determined via calculation. However, a high machining force at the start of the workpiece cutting was observed and the factor contributing to this phenomenon was not determined, although this phenomenon leads to a shape error to a certain degree according to the machining condition. In this study, the main objective is to suggest a method to reduce the machining force at the start of the workpiece cutting and shape error. Hence, we develop a theoretical method to estimate the machining force by using an instantaneous cutting force model, which considers the synchronized motion of two linear axes and a rotary axis of the 5MC. Subsequently, we determine the most suitable approach path of the tool considering the prediction of the machining force. The results of this study indicate that the machining force can be estimated by applying an instantaneous cutting force using the feed per tooth and machining angle, and that both a high machining force at the start of the workpiece cutting and shape error reduction can be realized by using the proposed approach path of the tool.
Deteksi Cepat Foodborne Pathogen Bakteri Cronobacter Sakazakii pada Susu Formula dengan Metode Real -Time Polymerase Chain Reaction
Authors: Wulandari Novi , Sihombing Ananda Indah Putri , Nurjayadi Muktiningsih
Published: May 2024

Abstrak
Keracunan pangan merupakan masalah yang sangat serius dan berpengaruh besar dalam kehidupan manusia. Keracunan pangan dapat terjadi ketika mikroorganisme patogen atau zat kimia beracun mengkontaminasi pangan dan dikonsumsi oleh makhluk hidup. Mikroorganisme patogen yang dapat mengkontaminasi pangan atau foodborne pathogen salah satunya adalah bakteri Cronobacter sakazakii yang merupakan bakteri gram negatif. Bahaya yang ditimbulkan oleh adanya kontaminasi C. sakazakii menjadi masalah dan tindakan pencegahannya masih sangat minim karena kurang adanya sarana dan prasarana yang memadai. Salah satu pengembangan metode yang dikembangkan adalah real-time PCR. Pada penelitian ini, dilakukan deteksi Cronobacter sakazakii pada susu formula menggunakan real-time PCR yang dikultur pada media cair Buffered Peptone Water (BPW). Cronobacter sakazakii diektraksi menggunakan kit Viogene® MiniPlus Plasmid DNA Extraction System. Konsentrasi dan kemurnian isolat diperiksa pada Nanovue spectrophotometer dengan rasio A260/A280 yang menghasilkan konsentrasi sebesar 282 ng/µL dan 88 ng/µL serta kemurnian sebesar 2.153 dan 2.178. Hasil pendeteksian menggunakan rt-PCR direpresentasikan dalam bentuk kurva amplifikasi dan melting curve. Sampel dinyatakan positif terkontaminasi Cronobacter sakazakii pada nilai Ct 22.033 dan Ct 16.732. Melting curve yang dihasilkan memiliki nilai 81.67℃ dan 80.95℃.
Kata kunci: Foodborne pathogen, Cronobacter sakazakii, real-time PCR
Abstract
Food poisoning is a very serious problem and has a great influence on human life. Food poisoning can occur when pathogenic microorganisms or toxic chemicals contaminate food and are consumed by living beings. One of the pathogenic microorganisms that can contaminate food or foodborne pathogens is the Cronobacter sakazakii bacteria which is a gram-negative bacterium. The danger posed by the presence of C. sakazakii contamination is a problem and prevention measures are still very minimal due to the lack of adequate facilities and infrastructure. In this study, detection of Cronobacter sakazakii in infant formula was carried out using real-time PCR cultured on Buffered Peptone Water (BPW) liquid media. Cronobacter sakazakii was extracted using Viogene® MiniPlus Plasmid DNA Extraction System kit. The concentration and purity of the isolate were checked on a Nanovue spectrophotometer with an A260/A280 ratio resulting in concentrations of 282 ng/µL and 88 ng/µL and purities of 2.153 and 2.178. These detection results are represented in the form of an amplification curve and melting curve. Samples tested positive for Cronobacter sakazakii contamination at Ct 22,033 and Ct 16,732. The melting curve of Cronobacter sakazakii in the samples had values of 81.67℃ and 80.95℃.
Keywords: Foodborne pathogen, Cronobacter sakazakii, real-time PCR