bluuebunny/crossref_metadata_2025 huggingface dataset:
Diseminasi Teknologi Perbanyakan Vegetatif Durian Pada Kelompok Tani Desa Kaumrejo Kecamatan Ngantang Kabupaten Malang
Authors: Husen Syarif , Machmudi Machmudi , Muhidin Muhidin , Santoso Untung , Purnomo Agus Eko
Published: October 2023

Ngantang merupakan salah satu daerah penghasil durian lokal di Kabupaten Malang, daerah ini memiliki cuaca yang sejuk dengan ketinggian tempat 870 meter diatas permukaan laut. Durian adalah salah satu jenis buah yang memiliki nilai ekonomis dan peluang pasar yang tinggi untuk dikembangkan. Dalam upaya pengembangan usaha agribisnis durian, dukungan akan ketersediaan benih bermutu sangatlah menentukan keberhasilannya. Kelompok tani Desa Kaumrejo menanam durian dengan sistem budidaya seadanya atau bisa dikatakan sangat tradisional dengan asal bibit yang tidak jelas mutunya. Tujuan dari program ini adalah menciptakan petani durian Desa Kaumrejo secara maniri dapat menghasilkan bibit tanaman durian yang unggul dan berkualitas sehingga dapat meningkatkan produktivitas dan berimbas terhadap pendapatan petani durian. Pelatihan dilakukan dengan metode praktik aktif oleh pakar dari Universitas Muhammadiyah Malang, petani diajarkan untuk membuat bibit secara mandiri dengan cara perbanyakan vegetatif yaitu grafting dan okulasi. Dari pelaksanaan program, petani telah mampu menghasilkan bibit durian dengan tingkat keberhasilan 58,33% untuk metode okulasi modifikasi, 40,74% metode grafting V, 53,33% metode okulasi chip, dan 36,36% untuk metode okulasi forkert.Â Ngantang is one of the local durian-producing areas in Malang Regency, this area has cool weather with an altitude of 870 meters above sea level. Durian is a type of fruit that has high economic value and market opportunities to develop. To develop a durian agribusiness, support for the availability of quality seeds is critical to its success. The Kaumrejo Village farmer group grows durians with makeshift or traditional cultivation with seeds of unclear quality. This program aims to create durian farmers in Kaumrejo Village to independently produce superior and quality durian seeds so that they can increase productivity and impact the income of durian farmers. The training was carried out using active practice methods by experts from UMM. Farmers were taught to make seeds independently through vegetative propagation, namely grafting and grafting. From the implementation of the program, farmers have been able to produce durian seedlings with a success rate for the modified grafting method of 58.33%, the grafting V method of 40.74%, the chip grafting method of 53.33%, and the forkert grafting method of 36.36%.
Remarks to the facies development of the Letná Formation (Upper Ordovician, Sandbian) in the northern part of the Prague Basin
Authors: Budil Petr , Fatka Oldřich , Čech Stanislav , Mikuláš Radek , Nohejlová Martina , Franěk Jan , Vodička Jakub , Polechová Marika
Published: October 2023

About 100–150 m thick intercalation of dark micaceous siltstone to black clayey shale can be distinguished in the middle part of the Letná Formation (Upper Ordovician, Lower Sandbian) at several localities in the NW and NE parts of the Prague Basin. Sandstone and greywacke, dominant elsewhere in this formation, form only a subordinate part of the sequence. In the NW belt of the Letná Formation, N of the Prague Fault (see Fig. 1C), this thick intercalation has been previously known from Bulovka – Bílá Skála Rock and from Rudolfova Štola Gallery (Röhlich 1956, 1960; Mikuláš 1994). A comparable, slightly thinner, and locally discontinuous intercalation of dark siltstone and black clayey shale was described also in the middle belt of the Letná Formation, S. of the Prague Fault (see Fig. 1C) by Röhlich (1956, 1960); such lithology is known from the Praha – Žižkov, Kyje and Malešice areas. An equivalent of this interlayer was documented by Budil (1996) in the middle part of the Letná Formation from the Černý Most area. No such interlayer of dark, fine-grained sediments has been reported from the southern belt of the Letná Formation (Fig. 1C), most probably because of its much poorer exploration. New borehole documentation at Praha – Střešovice extends our knowledge on the above – discussed dark siltstone and claystone intercalation in the NW belt of the Letná Formation. In two boreholes (HJ 11 and HJ 16), more than 60 m thick sequence of dark, fine-grained sediments has been documented in the middle part of the Letná Formation. The presence of these sediments was confirmed also by the study of archive data – previous geotechnical documentation of this area. The archive data documented the presence of a second, thinner and rather lens- like body of dark, fine-grained sediments which can be traced in the lower third of the Letná Formation in the Střešovice area. It is suggested that the sedimentation of relatively thick sequences of dark siltstones and shales reflects short-time periods of decrease in the input of clastic material. Alternatively, it could correspond to a partial, synsedimentary tectonic-related deepening of respective parts of the sedimentary basin. Locally bioturbated black siltstone and shale sequence is barren of benthos and contains only rare remains of indeterminable linguliformean brachiopods. It is supposed that such association corresponds to the Paterula Com- munity of Havlíček (1982), so far only poorly documented from the Letná Formation (Van Roy et al. 2021)
Can Students’ Misconceptions regarding Decimal Notation be Eliminated with the 5E Model Enriched with Digital Concept Cartoons?
Authors: YENİL Tuba , GÖKKURT ÖZDEMİR Burçin
Published: October 2023

This study eliminates students’ misconceptions about decimal notation with the teaching method implemented according to the 5E model enriched with Digital Concept Cartoons (DCCs). The study was conducted with eight sixth grade students. In this study conducted using the action research method, lesson plans were designed based on the 5E model enriched with DCCs to eliminate misconceptions. The data were collected from Misconception Identification Forms 1 and 2, observation notes, and interviews conducted during the implementation process. Qualitative data analysis techniques were employed to analyze the data. Consequently, it was revealed that most students’ misconceptions about decimal notation decreased with the application of the 5E model enriched with DCCs. After the implementation, it was observed that most of the students’ misconceptions about sorting, place value, addition–subtraction, marking the numbers on the number line, and rounding in decimal notation were largely eliminated. In contrast, it was observed that students’ misconceptions regarding the multiplication/division operations and problems in decimal notation did not decrease.
Peculiarities of Teaching the Course «Civic Education» in Ukraine (Since 2022)
Authors: Shevchenko Anatolii , Kudin Sergiy
Published: October 2023

This article examines the peculiarities of teaching the «Civic Education» course in Ukraine, starting in 2022. The results. It has been proven that after mastering this educational discipline students of 10th grade of general secondary education institutions can acquire a valuable stock of knowledge at worldview, social science, political and legal, environmental, information and mass media levels, acquire knowledge about the main directions of European and international politics. It was found that, nevertheless, the curriculum of the academic discipline needs additions, which are related to the democratization of public life in Ukraine, the holding of democratic elections to the bodies of state power and local self-government in Ukraine in the period 2014-2021, the permanent armed aggression of Russia against Ukraine; the assistance to Ukraine by Western partners; the challenges of the present and the future. The changes and additions proposed by the authors of the article cover the theoretical foundations of the course, key competencies, principles of designing the course content, a list of basic concepts, the content of directions that form integrative civics knowledge. It is substantiated that the content of the educational subject can be improved thanks to the correction of sections and topics of the course program, which have a worldview and moral and ethical character (personality and its identity, socialization of personality, self-realization of a person). Conclusions. The need to make additions to the sections and topics necessary for the formation of an active citizen of Ukraine in the political and legal aspect (human rights and freedoms, democratic society and its values, civil society, rule of law, welfare state) has been established. The relevance of making additions to the content of the educational subject, which are directly related to the radical change in the living conditions of Ukrainian society in connection with Russia's war against Ukraine, is emphasized. It has been determined that such additions may refer to the sections about the person in the socio-cultural space, about the world of information and mass media, about Ukraine, Europe, the world.
The role of HEIs of Ukraine in the Implementation of Social Innovations
Authors: Vovchenko Olena
Published: October 2023

The study is devoted to the analysis of university forms of social innovation, necessary during the war and for the post-war reconstruction of Ukraine. Methods. In the process of research the methods of theoretical search, historical, abstract-logical, comparative and descriptive were used. Results. An assessment of possible forms of development of social innovations on the basis of higher education institutions (HEIs) of Ukraine, namely social entrepreneurship, outreach activities of universities, and socially oriented models of education is given. An analysis of the rating higher education institutions of Ukraine regarding the implementation of social innovations in the scientific and educational process is carried out. Examples of the implementation of socially oriented learning outcomes that provide war-related societal demands are presented. Scientific and methodical recommendations for higher education institutions on improving the quality of the scientific and educational process with the help of social innovations during the post-war reconstruction of Ukraine have been developed. Conclusions. The results of the study demonstrate the increasing role of the HEIs in the implementation of social innovations as a method of post-war reconstruction of Ukraine and establishment of partnership relations with external participants, including at the international arena.
Ethno-Artistic Competence of a Music Teacher: Essence, Structure, Features of Formation
Authors: Rui Gou
Published: October 2023

Abstract. This article examines the main competencies of a modern music teacher. The purpose of the article is to characterize the essence, structure and features of the formation of ethno-artistic competence of a music teacher. The used research methods are: analysis and generalization, modelling, synthesis. Results. It has been established that the actions of the music teacher should be primarily aimed at the formation of key competencies, since the training can be successful in which the following chain is clearly traced: from a competent teacher to a competent student. Therefore, the importance of developing new approaches to the formation of musical art teachers' rich professional, personal and creative potential, which allows realizing the educational possibilities of ethno-artistic imitation, becomes obvious. In this regard, the issues related to the interpretation of the concept of "ethno-artistic culture", the means and methods of its formation in the system of professional musical education are considered. Moreover, the author believes that it is also important that ethno-musical education should provide opportunities for ethnic, ethno-cultural, ethno-musical identification in the course of involvement in ethnic musical values for the formation of ethno-cultural identity. Conclusions. The author of the article concludes that the process of forming the future specialists’ ethno-artistic competence is effective under the following conditions: ethno-musical education should become a means of consolidating peoples, a factor in the activation of intercultural interaction in the conditions of multicultural education; it should be closely related to polymusical education (where integrative processes are strengthened, ensured by the openness of other cultures, a polymusical competence is forming, and the polymusical education role is intensifying). It has been established that the formation of a specialist who has ethno-artistic competence is more effective in the process of his/her purposeful multicultural education, which is carried out with the help of introducing a multicultural component into professional and pedagogical training, which at the same time promotes the development of intercultural dialogue under the conditions of a multi-ethnic world.
Features of the Intellectual Development of Preschool Children in the China
Authors: Shujuan Bao
Published: October 2023

The article examines the peculiarities of the intellectual development of preschool children in the People's Republic of China, reveals the connection between the dependence of a preschooler's intellectual development on the peculiarities of his/her interaction with the surrounding social environment. The purpose of the article is to analyze and characterize the features of the intellectual development of preschool children in the People's Republic of China. Among the research methods used, the following were decisive: analysis and generalization of scientific and methodical sources for theoretical substantiation of research problems, modelling, synthesis of the obtained data. Results. The results of the study of the intellectual development of high-status, medium-status and low-status members of educational groups of primary schools in the People's Republic of China are presented. It is shown that the intellectual development of high-status and middle-status children aged 4 to 5 years is higher than that of their low-status peers, primarily in aspects such as perception, attention, and memory. It is noted that the integral indicator of high-status subjects corresponds to an average or high level of intellectual development. Moreover, a high level is characteristic of the majority of subjects in this category. The integral indicator of intellectual development of middle-status test subjects is quite comparable to that of high-status subjects. Attention is drawn to the fact that, in fact, there is only one, but important feature between these two categories of subjects ‒ among the high-status children, there are no children with an integral indicator of intellectual development below the average. Conclusions. The integral indicator of intellectual development of the majority of low-status subjects corresponds to a low level of intellectual development. Through the prism of the concept of «interpersonal development situation», the dialectical relationship between the intellectual and socio-psychological development of preschool children in the People's Republic of China is analyzed. Methodical provision of the structure of interpersonal relations in educational groups of kindergartens of the People's Republic of China is presented. Based on the results of the research, a number of scientific and practical recommendations are proposed.
BAVILO MA BYŤ ETNOGRAFKOU
Authors: Stoličná - Mikolajová Rastislava
Published: October 2023

Autorka uvádza reflexie na svoje 50 ročné pôsobenie etnografky. Kniha obsahuje aj text jej bývalej doktorandky, ktorá hodnotí úlohu R. Stoličnej v jej vedeckej kariére. Ďalší text predstavuje profesionálnu kariéru autorky a súpis jej publikovaných prác.
DYNAMICS OF CHARACTERISTICS OF THE GLYCEMICAL PROFILE OF PATIENTS WITH CORONARY HEART DISEASE AND OBESITY AFTER TREATMENT
Authors: Gridneva Olga V.
Published: October 2023

Introduction. Cardiovascular diseases (CVD) have the status of an epidemic, as they have high levels of prevalence and are the main cause of disability and mortality both in Ukraine and in the world and cause a significant increase in health care costs. Among all CVDs, coronary heart disease (CHD) ranks first. Many studies confirm a high percentage of CHD among all CVDs, especially in comorbidity with hyperlipidemia and obesity. Therefore, when treating CHD disease with obesity, it is necessary to take into account the effectiveness of the applied pharmacological agents and determine the dynamics of pharmacological intervention.

The aim. To determine the dynamics of indicators of the glycemic profile in the comorbid course of CHD and obesity after the treatment.

Materials and methods. It was conducted a randomized controlled single-center prospective study case-control, which is based on the analysis of the results of 130 people aged 25–85 were examined, who were divided into 3 groups: 70 persons (main group) with CHD on the background of obesity and 35 people with isolated coronary artery disease (comparison group) and control group (25 practically healthy people). The studied groups were randomized by age and gender.

Results. Before treatment, a probable predominance of daily glucose levels was determined in patients main group to the patients comparison group and controls. According to the results of the glucose tolerance test (GTT), an improbable excess of fasting glucose levels and after a glucose load was determined in CHD with obesity (respectively 5.64±1.92 and 7.08±2.25 mmol/l) compared to the isolated of CHD (respectively 5, 15±2.22 (p=0.791) and 6.20±3.15 (p=0.403) mmol/l) and control group (respectively 5.32±0.49 (p=0.685) and 5.42±0, 51 (p<0.001) mmol/l). After treatment, recovery of blood glucose levels was determined.

Conclusions. It was established that the characteristics of the dynamics of glucose metabolism indicators can be used as an indicator of the effectiveness of the treatment in the comorbidity of obesity and CHD. The obtained results indicate that the characteristics of glucose metabolism in the comorbidity of CHD and obesity must be taken into account to ensure therapeutic and preventive measures.
THE CONDITION OF MUCOCILIARY CLEARANCE IN PATIENTS WITH NASAL SEPTUM DEVIATION AND POSTNASAL DRIP SYNDROME
Authors: Babchenko Natalia V.
Published: October 2023

Introduction. Mucociliary clearance is a vital defense mechanism in the human upper respiratory tract that safeguards the body against inhaled harmful substances. Ciliary activity was first discovered by Sharpey in 1835, and it took nearly a century for this function to be recognized as a central component in the physiology of the sinuses.

The aim of this study is to investigate the status of mucociliary clearance in patients with a nasal septum deviation and concomitant postnasal drip syndrome.

Materials and Methods: A total of 54 patients, aged between 23 and 55 years, were enrolled in the study. All participants underwent a saccharin test and an assessment of the motor activity of the ciliated epithelium. Exclusion criteria included the presence of infectious and inflammatory diseases of the upper respiratory tract within the last month.

Results: In the control group of patients, no significant difference was observed in the speed of saccharin test passage, both in the right and left parts of the nasal cavity, with test times ranging from 8.35 to 14.52 minutes. However, in the second clinical group comprising patients with nasal septum deviation, the average time for the saccharin test on the mucous membrane of the concave side of the nasal septum was significantly longer than on the convex side, measuring 21.52 ± 3.04 minutes and 12.36 ± 2.73 minutes, respectively (P = 0.02). When assessing the data from patients in the third clinical group based on the curvature side, a significant difference (P < 0.05) was observed in the reduction of saccharin test speed compared to the control group.

Conclusions: The data obtained indicate a significant influence of nasal septum deviation on subsequent changes in nasal cavity physiology, resulting in a slowdown of mucociliary clearance. This can lead to excessive mucus stagnation in the nasal cavity and, consequently, the development of postnasal drip syndrome.
HEALTH LITERACY AS A DETERMINANT OF STUDENTS’ PROFESSIONAL SELF-REALIZATION: EXPERIENCE OF THE SLOVAK REPUBLIC
Authors: Voliarska O. , Matulcik J. , Sejcova L. , Puchyn O.
Published: October 2023

Introduction. The article presents the results of diagnosing the health literacy of students of higher education institutions. This research was conducted within the VEGA project of the Ministry of Education, Science, Research and Sports of the Slovak Republic No. 1/0293/21 “Education for Adult Health” (2022–2023) by representatives of the Department of Pedagogy and Andragogy Comenius University in Bratislava with the participation of Ukrainian colleagues.

The aim of the study is to assess the role of health literacy and analyze the results of empirical research to determine the level of the health literacy among the students at the universities in the Slovak Republic. The scientific innovation involves the determination of potential contribution to the increase of students‘ health literacy level so as to implement the startegies to improve professional self-realization within the high education system.

Material and methods. The results of students’ diagnosing are described according to the modified European Health Literacy Survey Questionnaire (HLS_EU_Q47).

Results. The majority of the respondents is found out to have the sufficient level of the health literacy. It is identified that all respondents understood the need of additional informal training and gaining the skills of education activities. It is explained that the increase of the health literacy level results in gradual shaping of an expert’s professional self-realization: only a person who is mentally healthy and conscious of health and healthy lifestyle issues can be aware of his/her ways for professional improvement.

Conclusions. The role of digital technologies in improving medical literacy of students is proved. The research results should become the basis for developing and implementing of educational activities to support public health.
PRINCIPLES AND METHODS OF RESEARCH ON THE QUALITY OF LIFE IN PATIENTS WITH DIABETES
Authors: Kondratiuk Nataliia Yu. , Tkachenko Rymma P.
Published: October 2023

In recent years, assessing the quality of life of patients with diabetes, as an indicator of the patient’s overall well-being, which affects not only the course of the primary condition but also the prognosis of the development of complications and associated conditions, has become particularly important.

According to WHO experts, the quality of life is an integral characteristic of a person's physical, psychological, emotional, and social functioning, based on their subjective perception.

The aim: to conduct analysis and synthesis of scientific publications on the selection of instruments for researching the quality of life of patients with diabetes.

Materials and methods: The analysis and synthesis of scientific publications regarding the utilization of standardized questionnaires to assess the quality of life among patients with type 2 diabetes mellitus were conducted. The appropriateness and practicality of their utilization in the clinical practice of healthcare professionals were analyzed. The following methods were employed: a systematic approach, bibliosemantic analysis, as well as analytical and comparative methods.

Results: Given that virtually any chronic illness can influence the structure of a patient's psyche and personality, it can be inferred that diabetes leads to similar consequences, which undoubtedly impact their quality of life.

Quality of life is a multifaceted concept that encompasses the influence of disease severity and physical condition on the patient’s physical, social, economic, and emotional well-being. This is why assessing the patient’s quality of life is increasingly crucial in evaluating the effectiveness of diabetes therapy. Moreover, it is essential to assess several parameters, taking into consideration not only the patient’s physical state. We have conducted an analysis spanning almost 40 years to identify effective questionnaires for assessing the quality of life of diabetes patients.

Conclusions: It is evident that assessing the quality of life of patients and identifying factors that impact it are crucial elements in the formulation of intervention strategies aimed at enhancing the quality of life for these individuals.
CORRELATION BETWEEN INDICATORS OF BALANCE OF NERVOUS PROCESSES WITH LOCALIZATION OF CONTROL IN HIGH SKILLED WOMEN HANDBALL PLAYERS
Authors: Petrovska Tetiana , Arnautova Lilia , Palamar Borys , Khmelnitska Irene , Fedorchuk Svitlana , Hanaha Olha , Kohut Iryna
Published: October 2023

Introduction. The problem of finding the psychological resource of the athlete remains relevant. Success in sports largely depends on the athlete’s individual psychological characteristics. Many authors, based on research, conclude that the internal locus of control has a positive effect on performance in team and non-team sports. It seems to be an interesting scientific problem to study the gender aspect of this problem.

The purpose of the study: to establish a relation between the locus of control and the characteristics of the response to the moving object of elite women handball players.

Materials and Methods: Athletes of the Ukrainian National women handball team (21 players aged 17 to 28, experience in this sport from 5 to 19 years) took part in the research. To study the locus of athletes' control over significant events, the method for the research of the level of subjective control (LSC) by J. Rotter was used. Software and hardware complex “BOS-test-Professional” for psychological and psychophysiological diagnostics was used to determine the characteristics of the athlete’s response to the moving object.

Results: A study of internality found that the majority of skilled handball players (61.9%) have a general internal type of locus of control. The vast majority of athletes tend to take responsibility in the field of productive (sports) relations (81%), areas of achievement (71.4%) and failures (52.4%). However, in areas such as family relationships, health and illness, most athletes share responsibility with the social environment and feel unable to control external circumstances. A correlation has been identified between the internality of locus of control and the ratio of nervous processes (inhibition and excitation) in elite women handball players. Higher stability of athletes' responses to a moving object is associated with a more pronounced internal locus of control, but only in the field of family relations. The obtained data indicate a more optimal functional state of the athlete’s central nervous system with internal locus of control.

Conclusions: Family relationships and health & illness are the most sensitive areas for female athletes. This fact provides a basis for gender mainstreaming in psychological support activities.
Sociocultural processes in Roma communities in Tyumen (results of a sociological research)
Authors:   Industrial University of Tyumen, Gudenkova Olesya I. , Rebysheva Lidia V. ,   Industrial University of Tyumen
Published: October 2023

The article is based on data from focus groups, which were conducted in 2023 among representatives of two Roma communities living in Tyumen: Moldovan Roma and Russka Roma (Russian Roma). The choice of this method of gathering information is due to the closeness of Romani people, who practically don't cooperate with scientists, which makes it difficult to obtain and interpret data. During the focus groups, we have used an auxiliary method such as an interview to obtain additional information. This allowed us to reveal intra-communal ideas and norms for the functioning of local communities. Both methods turned out to be difficult from the point of view of organization, since they required not so much careful preparation as the search for channels to reach the Gypsy barons, which made it possible to meet with the most respected representatives of the Gypsy camps and to determine the time and place for the focus groups. The article presents data that made it possible to carry out a qualitative analysis of some elements of the traditional culture of Romani people, who have managed to preserve their identity in the conditions of modern society.
Actors in the development of non-capital industrial cities: theoretical and methodological approaches to research
Authors:   Sh. Marjani Institute of History of Tatarstan Academy of Sciences, Makarova Guzel I.
Published: October 2023

The global challenges facing Russia and Russian society dictate the need to boost production and find resources to develop the country's industrial cities. These resources are related to the presence/absence of real leaders in them who are interested in transforming the city and who are able to act as integrators of managerial, industrial, business and creative communities. The aim of the article is to reveal the possibilities of the actor approach and related theories and methodologies for unlocking their potential, evaluating the effectiveness of activities. The question about the participants in urban processes, their direction and prospects determined the choice of M. Weber's theory of social action, developed in the concepts of A. Touraine, P. Bourdieu and E. Giddens, P. Sztompka and V. A. Yadov, as the basis for further research on industrial cities in Russia. Attracting the thought-activity methodology of G. P. Shchedrovitsky and Yu. V. Gromyko helps to de-fine the criteria for evaluating the activities and communication of urban development entities, to understand the role of the target image of the city (formed on the basis of project or scenario approaches) in giving direction to their strategies. Methodology of predictive social design T. M. Dridze makes it possible to predict the social consequences of management decisions based on the opinions of all stakeholders. All these approaches are considered through the prism of the possibility of their application to the study of the actors of non-capital industrial cities of Russia with a generalization of the developments that are available in this direction in Russian science. The significance of the work lies in the theoretical advances in the study of urban development actors with a focus on non-capital industrial cities, in the creation of theoretical and methodological foundations for further research into their potential, strategies and practices.
Pemanfaatan Limbah Stockpile Batubara Sebagai Media Elektrolit Untuk Menghasilkan Tegangan Listrik Dengan Kombinasi Elektroda
Authors: Leni Sundari  , Atina  , Andi Arief Setiawan
Published: October 2023

Limbah stockpile batubara mengandung ion-ion terlarut yang dapat menghantarkan arus listrik, sehingga dapat digunakan sebagai media elektrolit. Larutan yang mengandung ion-ion tersebut jika dimasukkan dua elektroda logam yang berbeda akan menghasikan tegangan litrik. Penelitian ini bertujuan untuk mengkaji tegangan listrik yang dihasilkan limbah stockpile batubara dari kombinasi jenis elektroda dan menganalisis tegangan listrik yang dihasilkan dari luas penampang elektroda yang berbeda-beda. Metode yang digunakan dalam penelitian ini adalah metode eksperimen dengan kombinasi jenis elektroda (Cu-Zn), (Zn-Al), (Cu-Al) dan luas penampang elektroda 1 cm x 10 cm, 3 cm x 10 cm, 5 cmx 10 cm. Data yang diperoleh di analisis secara deskriptif dan dilanjutkan dengan analisis uji F 2 faktor (faktor kombinasi jenis elektroda dan luas penampang elektroda), untuk melihat perbedaan antarperlakuan dilakukan analisis Beda Nyata Terkecil (BNT). Hasil penelitian menunjukkan kombinasi jenis elektroda (Cu-Zn) menghasilkan tegangan listrik tertinggi pada luas penampang elektroda 5 cm x 10 cm yaitu sebesar 1,02 volt. Uji F 2 faktor Menunjukkan bahwa kombinasi jenis elektroda dan luas penampang elektroda berpengaruh nyata terhadap tegangan listrik yang dihasilkan.
Basal Cell Carcinoma Mimicking Dermatofibrosarcoma Protuberans: Case Report
Authors: Miguel Olmos Pérez Edgar , Gonzalez Claudia , Camila Toscano-Madero María , Andrea Morales Cardenas Carolina
Published: October 2023

Introduction: Basal cell carcinoma (BCC) is the most common type of carcinoma worldwide. BCC development is the result of a complex interaction between environmental, phenotypic and genetic factors. Presentation is highly heterogeneous, presenting from superficial or nodular lesions with a good prognosis to very extensive lesions in atypical locations clinically and radiologically mimicking other tumors. Case presentation: We present the case of a 34-year-old man with no past medical history, with an asymptomatic nodule that was increasing in size on the right thigh. High-frequency ultrasonography (HFUS) evaluation revealed an oval-shaped lesion with mixed echogenicity and posterior enhancement, with Doppler showing increased vascularization. A biopsy of the lesion was performed with suspicion of dermatofibrosarcoma protuberans, reporting unexpectedly an infiltrative basal cell carcinoma. The tumor was excised with free margins in the final pathology report. Conclusions: HFUS is an increasingly utilized tool that can accompany the study of a malignant lesion. Further studies are required to define more specific criteria for different skin tumors, always in conjunction with histology.
Pengaturan Investasi dalam Rangka Ketahanan Pangan di Asean dan Implikasinya bagi Indonesia
Authors: Delfiyanti Delfiyanti
Published: October 2023

Dalam rancangan integrasi regional pada Cetak Biru Masyarakat Ekonomi ASEAN 2025  meliputi sebuah agenda yaitu ketahanan pangan yang bertujuan untuk meningkatkan rantai nilai dan partisipasi regional dalam rantai nilai global melalui peningkatan efisiensi produksi pangan, perbaikan infrastruktur dan teknologi, penyesuaian kualitas dan keamanan pangan dengan standar-standar global, dan penggalakan investasi pada pertanian di Kawasan ASEAN. Peta jalan untuk mencapai tujuan-tujuan ketahanan pangan Masyarakat Ekonomi ASEAN tersedia dalam Kerangka ASEAN Integrated Food Security (AIFS) dan Strategic Plan of Action on Food Security (SPA- FS) Tahun 2020-2025. Keberhasilan implementasinya menjadi hal yang penting untuk membantu negara-negara anggota ASEAN menerapkan strategi untuk membangun rantai pasok pangan yang lebih kuat dan tangguh. Perjanjian ini terdiri atas berbagai pedoman dan rekomendasi yang tidak mengikat secara hukum, untuk diterapkan secara sukarela oleh negara-negara anggota ASEAN demi memastikan ketahanan pangan serta perbaikan nutrisi dan kehidupan petani di ASEAN secara jangka panjang. Bagi Indonesia ini merupakan suatu kesempatan melakukan kerjasama terkait dengan ketahanan pangan dengan negara anggota ASEAN lainnya.
Friction Thermal Effect Analysis of High Pressure Turbine Rubbing in Aero-Engine
Authors: Zhang Ying , Yang Zitong , Meng Xiangpeng
Published: October 2023

When the high-pressure turbine of an aero-engine comes into contact with friction, the friction-heat effect that results raises the temperature at the site of contact quickly. In extreme circumstances, it will harm the blades and casing and impair the engine’s ability to function properly. A vane-casing thermo-solid coupling model was developed using the finite element method to study the impact of the frictional heat effect on local details at the contact point. The distribution rules of blade temperature and stress were examined when the rotational speed changed and whether the coating was applied to the casing inner surface. The findings indicate that there is a temperature asymmetry between the blade and casing and that the rubbing friction heat effect is primarily distributed on the contact surface between the blade and casing. The influence area is also small and will rise to a high temperature in a very short period. Temperature and stress are impacted by variations in rotational speed and the use of coatings. The temperature and stress peaks at blade contact can be greatly decreased by coating the inside surface of the casing. The frictional heat effect created by rubbing should be taken into account in real-world engineering issues.
Effect of Sc on Microstructure and Corrosion Resistance of Fe-21Cr-4Al Alloy
Authors: Wang Jianguo , Jiang Senbao , Chen Yao , Wang Yusheng , Pu Rongsen , Yan Yue , Mao Di
Published: October 2023

The alloys with Sc content of 0 and 4 wt.% were prepared by vacuum hot press sintering using elemental Sc powder and Fe-21Cr-4Al pre-alloy powder as raw materials. The element Sc changed the XRD phases of Fe-21Cr-4Al alloy. In addition to the original matrix α-Fe phase, three Sc-rich phases are formed, namely, ScAlO3, Sc2O3 and Sc elemental. Meanwhile, Sc addition resulted in the formation of a protective corrosion product film on the corrosion face of alloy, which limited corrosion ion diffusion, thus reducing the corrosion rate of the alloy and enhancing its corrosion resistance. However, due to the lack of protective corrosion product film on the surface of alloys without Sc, large corrosion pits appear on the corrosion surface, and these pits continue to expand under the continuous erosion of corrosion ions. The corrosion speed of the alloy with Sc added was 4.302 mm/y, which was about 48.34% lower than that of the alloy without Sc.
Research on the Attenuation Mechanism of the Lithium Battery with Computational Chemistry and Surface/Interface Detection Methods
Authors: Liu Chen , Jia Guorui , Zou Daijiang , Wang Jianbin
Published: October 2023

One of important strategies to improve the ranges of battery electric vehicles is to develop and apply batteries with high energy density. Lithium-rich layered oxide cathode material is one of the most important methods to improve the energy density of batteries. However, there are two bottlenecks in the material: the voltage attenuation of structural transformation and the violent electrolyte decomposition on high voltage. In this study, a spherical Li1.2Mn0.54Co0.13Ni0.13O2 cathode material (LLO) was investigated. The cycle performance of the LLO cathode in various LiBOB electrolytes was compared. The metal dissolution on the positive electrode surface is reduced. Through theoretical calculation and X-ray photoelectron spectroscopy, the preferential combination of LiBOB and oxygen anion was verified, and the possible oxidation process of LiBOB in LLO cathode was speculated. Boron containing CEI film contained some unreacted BOB anion, half BOB structure (1B-O similar structure), alkyl borate, oxalate and lithium fluoride. The results of this study are helpful to understand the electrode / electrolyte interface chemistry of boron containing additives in lithium rich cathode.
Study on the Microstructure and Properties of T91 Steel Pipe after 96000 Hours Service Under High Temperature and High Pressure
Authors: Wang Yuwei , Liang Zhenxin , Yang Jia , Lu Li , Sun Qian
Published: October 2023

The microstructure, macro morphology, oxide layer morphology and mechanical properties of T91 steel after 96000 hours of service at high temperature and high pressure were investigated. The results show that the service steel pipe has good macroscopic appearance, no obvious wear, scratch, bulge, deformation, surface crack and other abnormal features, and no obvious thinning of wall thickness. The chemical composition of different pipe sections meets the standard, and the microstructure is mainly tempered martensite, which is evenly distributed, with a small amount of massive ferrite and no obvious coarse phase. The oxidation products are divided into internal oxide layer and external oxide layer, and the internal oxide layer is dense and continuous, microcracks appear in the loose oxide layer. After 96000 hours of service, T91 steel has good mechanical properties. The tensile properties at room temperature and high temperature are good. For room temperature, the yield strength and tensile strength are 480MPa and 630MPa, respectively. Under 500°C and high temperature, the yield strength exceeds 319MPa, the tensile strength exceeds 380MPa, and the elongation exceeds 17%. Hardness test values are between 185∼250 HBW.
Construction of Constitutive Model of Aeronautical Martensitic Stainless Steel 0Cr17Ni4Cu4Nb
Authors: Zhang Jilin , Zheng Xiaoping , Zhao Congchao
Published: October 2023

Aviation stainless steel 0Cr17Ni4Cu4Nb has excellent properties and is widely used in important parts of various machinery. The equivalent static compression test and impact test of 0Cr17Ni4Cu4Nb aviation Martensitic stainless steel at normal temperature were followed out by a universal test machine (UTM5305) and a high temperature separation Hopkinson test facility, respectively. The equivalent static compression data of 0.001, 0.01 and 0.1 s-1 at 25°C and the dynamic stress-strain data of 25, 350, 500 and 650°C at 25°C and the authors got strain rates of 750, 1500, 2000, 2600, 3500 and 4500. According to them, a Johnson Cook (JC) modified constitutive model was built and its prediction accuracy was confirmed. The consequences indicate that the correlation of association (R) is 0.987513 and mean relative error (AARE) of the revised JC constitutive equation is 0.51%, which indicate that the revised JC constitutive equation is a little accurate and reliable. When they are in high strain rates, generally speaking, they can predict its stress-strain connection.
Development of Brake Pad for Automobile Using Organic Wastes as Reinforcement Material
Authors: Abutu Joseph , Sadiq Ibrahim Ogu , Dan-Asabe Noseh Ali , Alabi Taiwo Adetunji
Published: October 2023

In this work, locally sourced organic wastes were used to produce brake pad using Taguchi experimental design. Organic wastes selected for production include seashell and snot apple fiber while graphite, ceramic wastes and araldite were used as friction modifier, abrasive and binder respectively. Nine samples were produced using Taguchi design technique by varying percentage composition and adopting constant process parameters. Sample characterization was carried out by investigating the tribological properties (wear rate and friction coefficient). The experimental findings revealed that optimal wear rate of the developed brake pad can be obtained using seashell (105.5g), snot apple fiber (4.5g), araldite (50g), ceramic (24g) and graphite (22g) while the optimal friction coefficient can be obtained using seashell (96g), snot apple fiber (4g), araldite (40g), ceramic (20g) and graphite (22g). Based on the results obtained, it can concluded that the selected organic wastes can effectively serve as reinforcement materials in the production of brake pads.
The Microstructure and Property Laser Cladding the Co-Based Alloy/TiC Coated with Co
Authors: Tong Wenhui , Sun Bowei , Xu Qingqi , Liu Yunyi , Wang Jie , Li Xiang
Published: October 2023

The hard phase added into the laser-cladding layer will be melted a lot with its size reducing or even disappearance because of rapidly heating of the laser beam with high power density during laser cladding, resulting in the properties of the laser cladding layer decreased. In order to regulate the hard phase size in the laser cladding layer, the surface modification of titanium carbide (TiC) by chemically clad cobalt (Co) was used to improve the expected performance after laser cladding. The mixing powder of Co-based alloy with the TiC powder of 40–60 μm, which the ratios among the Co-based alloy, Co-coated TiC and TiC powder are 7:3:0, 7:3:3, and 7:0:3, was clad to the surface of QT600-3 ductile iron substrate using a fiber laser, respectively, to obtain the cladding layer of 4mm thick by three sub-layers of cladding. Laser cladding process parameters are: laser power P=1.2kW, scanning speed of 320mm·min-1, spot diameter of 3mm, lap rate of 1.5 between two passes. The variation of the micro-structure, second phase and hardness of the cross-section of the layer was analyzed by Olympus metallographic microscope (OM), scanning electron microscope (SEM) observation with energy diffraction spectrum (EDS) and Rockwell hardness tester. The results show that the clad layer is well formed on the surface without cracks, pores and other defects and well bonded with the substrate. There exist a large number of TiC hard phases in the microstructure with a little difference of the TiC size compared with the raw material powder, because the melting of TiC under the laser beam is reduced after the TiC clad with Co. So, the hardness of the cladding layer was improved compared with the ratio of 7:0:3 and increased rapidly and then gently with the increase of the distance from the surface of the ductile iron substrate. Under the condition of 7:3:3 powder ratio, there appears a large amount of new dendritic TiC phase in the microstructure, where the grains were refined, and the maximum hardness of the clad layer was obtained with 64.5 HRC.
Effect of the Cell Structure of Porous Media on the Combustion Temperature Distribution
Authors: Wu Hong , Hu Jinglei , Chen Yuanyuan , Xu Xuecheng , Li Mingjie , Li Benwen
Published: October 2023

The structure of open-cell foam ceramic is mainly studied and analyzed, and two cell models, the Kelvin model and the Weaire-Phelan model, are constructed to express its structural characteristics. On the basis of these two models, the premixed combustion of porous media is numerically simulated, and the effect of cell structure parameters with respect to temperature distribution is studied. The results show that the effect of inlet velocity on gas temperature becomes weaker and weaker as the skeleton diameter increases and the peak solid temperature moves downstream; as the skeleton diameter decreases, the effect of the change in the equivalent ratio of the gas mixture to the temperature distribution diminishes, and the lower the gas/solid temperature at the outlet; at the same working conditions, the structure adopting the Weaire-Phelan cell model has more stable solid temperature distribution in the combustion zone, and then it shows a better service life performance.
Continuation Analysis of Rotor Bearing Systems Through Direct Solution of Reynolds Equation
Authors: Sayed Hussein , El-Sayed Tamer A. , Friswell M.I.
Published: October 2023

Rotor bearing systems are a crucial component in many engineering applications, with bearings are typically classified as either rolling contact or sliding contact. In this context, we focus specifically on sliding contact bearings, and more specifically on fluid film journal bearings. The fluid film between the rotor and stator in such bearings can be modeled using Reynolds equation, with the solution of this equation being important for evaluating the bearing’s nonlinear forces. In order to solve the dynamics of a rotor bearing system, Reynolds equation must be solved at each time step. However, this process can be time-consuming, leading many researchers to use approximate formulae to solve the equation more efficiently. In the present study, a continuation analysis was introduced to examine the dynamics of a rigid rotor bearing system without relying on any such approximations. Subsequently, a comparison was made between the findings of this analysis and those of two previously published models, one based on four variable polynomial regression [1] and the other based on short bearing approximation [2]. The results suggest that all three methods are effective in assessing the threshold speed. However, it was observed that the short bearing model exhibits reduced accuracy beyond the threshold speed.