bluuebunny/crossref_metadata_2025 huggingface dataset:
О работе над Атласом флоры России
Authors:   Московский государственный университет им. М.В. Ломоносова, Дудов С.В. , Серегин А.П.
Published: November 2023

В последнее десятилетие мы наблюдаем стремительный рост объема доступных для исследователей данных о биоразнообразии, в частности – о географическом распространении растений. Полностью или частично оцифрованы крупные гербарии страны: Московского университета, Центрально-Сибирского ботанического сада, Ботанического сада-института ДВО РАН и др. Большой интерес у любителей природы и научной общественности нашел проект-зонтик «Флора России» на платформе INaturalist. Очевидная научная задача – переход от накопления и оцифровке данных к их научной обработке и анализу. В 2022-м году мы собрали компилятивный датасет FLORUS по распространению сосудистых растений на территории России. В него вошли все данные, ранее опубликованные в GBIF, а также ранее не публиковавшиеся фитоценотеки и оцифрованные литературные источники, любезно предоставленные коллегами. Мы привели всю таксономию к Catalogue of Life, автоматически исключили ошибочные и недостоверные данные. После чистки датасет включает 4.9 млн. записей. Предварительно пометив все культурные растения, мы выбрали 8724 вида, в диком виде произрастающие в России и представленные минимум в 2-х квадратах сетки 100*100 км. Для всех этих видов мы построили карты ареалов и приступили к их экспертной обработке. Протокол проверки карт включает поиск ошибок геопривязки, проблем таксономической идентификации, отделения диких популяций от произрастания в культуре, отделение нативного и чужеродного ареалов. Все выявленные ошибки исправляются в базе данных, после чего мы обновляем карты. Все карты ареалов растений опубликованы в открытом доступе на портале Цифрового гербария МГУ. Чистый массив данных позволяет подойти к решению задачи по разработке новой карты флористического районирования России. Мы привязали весь массив к квадратам 100*100 км, исключили все недоизученные квадраты на основе карты видового богатства Л.И. Малышева и подготовили два карты районирования. Первая построена путем привязки всего массива данных к глобальной филогении сосудистых растений [2] и расчета метрики филогенетических расстояний [1], она включает шесть фитохорионов. Вторая основана на флористическом сходстве квадратов и включает 26 районов. Полученные карты можно рассматривать как два иерархических уровня районирования, где первый соответствует флористическим областям, а второй — флористическим районам России.
Функциональное разнообразие высокогорных фитоценозов Северо-Западного Кавказа
Authors:   Московский государственный университет им. М.В. Ломоносова, Дудова К.В.
Published: November 2023

В рамках функционального подхода возможно решение ряда научных и научно-практических задач экологии растений [1]. Например, выявления необходимого уровня интенсивности выпаса для сохранения луговых экосистем [2]; прогнозирования изменения состояния экосистем под влиянием глобальных климатических изменений и ряда других [4]. Одним из таких направлений исследований является изучение механизмов формирования фитоценозов [3]. Целью настоящего исследования была оценка функционального разнообразия, вклада конкурентных процессов и влияния абиотических факторов в формирование видового состава фитоценозов, а также оценка значимости выбранных признаков для формирования высокогорных растительных сообществ. Исследования проводили на территории ФГБУ «Тебердинский национальный парк» в 8 типах растительных сообществ: альпийские лишайниковые пустоши, пестроовсяннициевые луга, гераниево-копеечниковые луга, альпийские ковры, пестрокостровые луга, вейниковые луга, высокотравные луга, болота. В рамках проекта сформирована база данных для 420 видов сосудистых растений по следующим признакам: вегетативная высота растений, масса обводненного и сухого листьев, площадь листа. По данным показателям были рассчитаны: содержание воды в листе, удельная листовая поверхность, процентный вклад каждой из экологических стратегий по Грайму. Для всех типов фитоценозов были проведены изменения биомассы на 100 площадках 0,25х025 м2. Рассчитаны индексы: FRic (функциональное богатство), FDiv (функциональная дивергенция), FDis (функциональная дисперсия), FEve (функциональная выравненность). Сгенерированы нулевые модели для каждого типа сообществ с рандомизацией значений функциональных признаков. Расчеты индексов и статистическую обработку проводили в среде R (основные пакеты: «FD», «basic», «ggplot2», «dplyr», «tidyverse»). Показали, что все изученные признаки являются значимыми для формирования высокогорных фитоценозов и в большинстве случаев их распределение в фитоценозах отлично от случайного. Индексы функционального разнообразия по большинству признаков значимо ниже, чем ожидается для случайных сообществ. FRic, в среднем, выше для альпийских фитоценозов, нежели для субальпийских. Наименьшие показатели индекса, а значит и устойчивость сообществ выявлены для пестрокостровых, вейниковых и высокотравных лугов. Значения FEve позволяют предположить примерно одинаковый уровень нарушений в сообществах. FDis, в среднем, выше для луговых фитоценозов и ниже для низкопродуктивных альпийских пустошей и альпийских ковров, что позволяет предположить большую значимость влияния абиотических факторов для формирования этих фитоценозов, в то время как в луговых экосистемах важную роль играют конкурентные процессы. Исследование поддержано РНФ № 19-14-00038-П
Researching Media and Democracy Researchers: Monitoring Capabilities in Poland
Authors: Głowacki Michał , Mikucki Jacek , Gajlewicz-Korab Katarzyna , Szurmiński Łukasz , Łoszewska-Ołowska Maria
Published: November 2023

In this article, we look at the conditions of media and democracy discourses in Poland via the lenses of monitoring time-related capabilities. We are interested in how media–societal change in 2000–2020 has influenced the Polish researchers’ responses to deliver applied research and further foster hyper-knowledge sharing between policymakers, media industries, and academia. Through an in-depth investigation of Poland’s media researchers’ publications database (N = 1,000), we aim to examine the crucial interest areas considering the critical cultural junctures in three highly related areas: technology, politics, and society. The critical junctures theory review follows the mapping of changes in related scholarly analyses to uncover three sides of Polish scholarship monitoring capabilities alongside cultural conditions of researchers’ impact on democracy and the media. The overall hypothesis is that examining media and democracy in Poland reflects technological and political change, with the cultural research path dependencies in analyzing broader social context (see, for instance, a young democracy, illiberal turns and social polarization conditions, and so on). This corresponds to related tensions between the Western media’s theories and practices concerning democracy.
Lessons Learnt from Online Teaching and Beyond: What now? Three Countries Speak
Authors:   Department of Informatics University of Pretoria, SA, Steyn Adriana Aletta , Van Slyke Craig ,   College of Business, Louisiana Tech University, US, Dick Geoff ,   St John’s University, US, Rodríguez-Abitia Guillermo ,   Raymond A. Mason School of Business, William & Mary, US, Twinomurinzi Hossana ,   Centre for Applied Data Science, University of Johannesburg, SA
Published: November 2023

The COVID-19 pandemic brought unprecedented challenges and changes to higher education. More than 100 countries went into lockdown, severely affecting education systems worldwide. There was an expectation that higher education institutes would “find solutions” — and fast. Many questions arose concerning the role of online courses, technology-mediated learning resources, and the long-term effects of the pandemic on students, faculty, and institutions. Information systems educators from Southern Africa came together at the 51st Annual Conference of the Southern African Computer Lecturers’ Association (SACLA 2022). The panel reported on here was part of that conference and brought together information systems educators from three countries, South Africa, Mexico, and the United States to share their experiences and reflections regarding the effects of the COVID-19 transition and its aftermath. A wide-ranging discussion ensued, that ran the gamut from micro-level individual experiences to macro-level effects and challenges. These perspectives cover “big picture” challenges and observations, inclusion and exclusion considerations, threats and opportunities, and two reports of experiences and the resulting modifications in COVID-19 classrooms. This panel report also focused on the lessons learned from the conference attendees' discussion and suggested a possible future research agenda.
EXAMINING ONLINE DESIGN STUDIO COURSE EXPERIENCES OF STUDENTS, ACADEMIC SUPERVISORS AND COMPANY MENTORS IN INDUSTRIAL DESIGN PROGRAM
Authors: OZDAMAR Nilgun , CURAOGLU Fusun , TUFEKCIOGLU Emre , TUTUNCU DEMIRBAS Duysal
Published: November 2023

The aim of this study is to share the experiences and the collaborations carried out within the sector during the pandemic period, in a graduation project which is focused on university-industry cooperation - in order to make the role of the designer in the sector more effective, to transform education into a comprehensive sectoral experience for students and to offer the sector the experience of working with the designer at Department of Industrial Design, Eskisehir Technical University. The method of the research is a case study examining by designing it with a holistic single-case design since it is a single, representative, and typical case. In the case study, the research group consists of the students who were enrolled in the 2019-2020 spring term graduation project course, academic supervisors and company mentors at Eskisehir Technical University, Turkiye. The result of the study is that pandemic opened the door to new educational experiences for design academics, students and companies. This sharp bend mainly affected the implementation processes of oneon- one lessons, just like the design studio, which we define as the heart of design education. It has also paved the way for different online interactive educational tools and platforms to be used for the educational components of the design of the process.
PRESCHOOL EDUCATION AND DISTANCE EDUCATION: TEACHERS’ OPINIONS ABOUT PRESENT STATUS AND FUTURE POSSIBILITIES
Authors: GKOROS Dimitrios , PAPAGEORGIOU Aikaterini
Published: November 2023

Coronavirus pandemic has imposed significant innovations in all aspects of our lives which were a respond to precautional measures to avoid covid-19 spreading throughout the community. In many countries, Greece included, education shifted rapidly to a distanced form affecting this section of our lives as well. The present study attempts to investigate the intergration of distance education in preschool education in the future as well as the factors that promote or inhibit it, by examining the views of kindergarten teachers. By employing quantitative modes of enquiry and specifically a significant number of questionnaires we concluded that teachers argue about the effectiveness of distance learning. Specifically, in order for the educational community to start a meaningful conversation about the integration of distance education in preschool education, issues such as teachers’ technological readiness, technological equipment and parental involvement need to be addressed.
ONLINE BIOCHEMISTRY DISTANCE LEARNING: DENTISTRY STUDENTS’ PERCEIVED OPPORTUNITIES AND CHALLENGES
Authors: PUNZALAN Christopher H. , RODRIGUEZ JR. Roberto L.
Published: November 2023

Undergraduate courses such as biochemistry were prompted to embrace online distance learning triggered by the incursion of the COVID-19 pandemic. This study worked to help solve the issues and concerns related to teaching biochemistry as a foundational course for dental and other health-sciences programs in the status of the educational system. The case study method was deemed a good way to focus on the objectives of this research because the theme was dentistry students’ perceptions and experiences dealing with the opportunities and difficulties that the COVID-19 pandemic brought with it in this circumstance. 11 purposively sampled dentistry students served as the participants of the study. Data were gathered through an online platform with open-ended questions which were thematically analyzed afterward. The identified opportunities were lumped into ROTE: Research works, Open and independent learning, Technology for education, and Education for health. Challenges encountered were grouped as DARE: Demand for technology, Acquisition of knowledge, Remote learning, and Environmental condition for studying. It is worth noting that the participants were enlightened on the academic and personal benefits of biochemistry online distance learning. The researchers appeal to future researchers and policymakers to anchor forthcoming steps to further augment the online teaching and learning experiences of teachers and learners.
IMPLEMENTATION OF FLIPPED MODEL IN EFL READING CLASSROOMS
Authors: KESKIN Dilara
Published: November 2023

Among many technology-enhanced teaching strategies, flipped classroom is one that gained popularity in recent years. This approach supports a more student-centered and communicative learning environment in English as a Foreign Language (EFL) classrooms. Although this approach is getting popular in the field, little research has examined the incorporation of flipped classroom approach in EFL classrooms. To address this gap, this study presented some tools to provide teachers an idea of how to flip a language classroom and make the learning process more active and communicative. Also, flipped classroom was examined through the eyes of EFL students. The data were collected through a learning experience questionnaire, focus group interviews and teacher observations. Descriptive statistics was used to demonstrate the mean scores of the questionnaire items. Content analysis was utilized for the interview data. The results revealed that EFL students had positive attitudes towards flipped classroom. Additionally, online assignments and discussion tasks were found to be useful for the implementation of flipped classroom in EFL reading classroom courses.
TECHNOLOGY INTEGRATION BELIEFS AND PRACTICES OF TURKISH NOVICE EFL TEACHERS AFTER ONLINE PRACTICUM
Authors: CUKUR Hatice Saliha
Published: November 2023

Although technology is a vital part of 21st-century education, teachers in English as a foreign language (EFL) contexts face challenges when using digital tools in their teaching. Studies have been conducted with in-service teachers to understand their beliefs and practices with digital learning of English. However, there is a gap in the literature about investigating the technology integration beliefs and practices of newly graduated EFL teachers who experienced online teaching practice during their pre-service education. Thus, this study aimed to investigate how novice teachers’ online practicum affects their teaching with technology in face-toface classrooms. To this end, this study adopted a qualitative case study research design and collected data through six open-ended questions from 20 Turkish novice EFL teachers who received their teaching practice and school experience courses online and conducted semi-structured interviews with 5 participants. The thematic analysis of the data showed that the participants were aware of the importance of technology use, and their online teaching practice experience helped them get familiar with teaching English with digital tools before graduating. However, the lack of resources and support in their current face-to-face teaching contexts prevented them from using technology. The findings revealed that teacher education programs should offer updated content and opportunities for creating digital material to prepare EFL teachers for the future.
PERCEIVED SUPPORT FROM INSTRUCTOR & PEERS AND STUDENTS’ SELF-REGULATED LEARNING DURING TEMPORARY ONLINE PIVOTED LEARNING
Authors: NGUYEN Hue
Published: November 2023

The third wave of the Covid-19 pandemic has made every higher education institution in Taiwan implement online learning. Given the circumstance, supporting students in their online self-regulated learning (SRL) became more critical to enabling students’ learning maintenance and learning success. The present study explores the impact of instructor support and peers support on students’ SRL during temporary online pivoted learning. 123 undergraduate and graduate students in Taiwan were surveyed on two scales The Instructor Support and Peers Support Questionnaire and The Self-Regulated Online Learning Questionnaire (SOL-Q). The descriptive results indicated that students had relatively good perceptions of instructor support, peers support and the online SRL. Additionally, the correlation analysis revealed that both instructor support and peers support had positive and moderate relationships with dimensions of the online SRL. Furthermore, the regression analysis substantiated the importance of instructor support to dimensions of metacognitive skills, persistence, and environmental structuring. In contrast, peer support was essential to metacognitive skills, persistence, and help-seeking. Lastly, there was a negligible impact of provided support on time management behaviors. The research suggested that educators and institutions should provide adequate support for students and facilitate interactive online learning environments for peer-to-peer support.
REFUGEE STUDENTS IN OPEN AND DISTANCE LEARNING DURING THE COVID-19 PANDEMIC THROUGH THE EYES OF TURKISH TEACHERS
Authors: NAZLI Kemal , CULHA Ali
Published: November 2023

This study was conducted to identify the problems faced by refugee students during Covid-19 pandemic in open and distance learning and the best examples of practices put into effect to cope with these problems cope and solutions recommended to eliminate these problems, in Turkiye. In the study, the phenomenological research design, which is one of a qualitative research method, was used. By using the criterion sampling technique, a total of 14 teachers who had refugee students were selected as the research participants. Interviews were held with the volunteer participants. The research data were collected by using a semistructured interview form. The descriptive analysis method was used in the analysis of the research data. According to the study findings, the refugee students who did not have the necessary educational technology facilities in open and distance learning process and could not get sufficient family support felt more deeply the language problems which is experienced also by them in face-to-face education. In order to help refugee students with these problems, some school administrations provided the refugee students with tablet and computer support within the bounds of their means. In order to alleviate the effects of the problems faced by refugee students, it is recommended to provide refugee students with educational technology support, making up education and psychological support.
PROFESSIONAL LEARNING NETWORK ACTIVITIES OF INDONESIAN TEACHERS: DIFFERENTIAL ITEM FUNCTIONING ANALYSIS OF TEACHERS’ BACKGROUNDS
Authors: KRISMANTO Wawan , SETYOSARI Punaji , KUSWANDI Dedi , PRAHERDHIONO Henry
Published: November 2023

Teachers’ professional development was gradually shifting to the learning paradigm. Developing a professional learning network (PLN) using social media platforms was one method of teachers’ learning. Therefore, this research aimed to investigate the level and differences of activity of teachers when engaged in social mediabased PLN using a non-experimental quantitative design. A total of 504 teachers were sampled, and data were collected using PLN Activities Questionnaire (TPLNAQ). Furthermore, the Winsteps application was used to perform the Rasch model analysis. The findings indicated that all teachers sampled had a moderate level of social media-based PLN activities. The demographic factor of qualifications significantly differed between teachers who joined the social media-based PLN. However, some instrument items showed significant differences in responses to the demographic factors of the teachers sampled, namely gender, age, teaching experience, qualifications, and certification.
METHODOLOGY FOR MINIMIZING OF LEGAL RISKS IN CITY
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Bezklubyi Igor
Published: November 2023

The article deals with methodological aspects of avoiding and reducing legal risks in the city. Legal problems are raised, which have an impact on the harmonious development of the city. Issues of danger for life of city-dwellers are considered. Appeal to theoretical problems of the methodology of risks is caused by the desire to investigate in which direction modern law develops on the way to regulate modern relations of safety in the city. The emphasis is on the methodology of legal risks, in that deep and broad sense, which helps not only in finding the criteria of delimitation of spheres of public and private law as well as subjective rights of participants of the relevant social relations, but also in the formation of our knowledge of a holistic picture on the way of security events in the city. The question of the ratio of approaches of risk definition is revealed at the interdisciplinary level. It is noted that the theory of private law gives quite comprehensive answers to the question of determining the risk, its legal nature and the relationship with the institution of responsibility. Using the methodological component, it is indicated those logical steps aim at fully avoiding or minimizing risks.
SPACE-TIME DISTRIBUTION OF CASES OF MASS DISTRIBUTION OF COMPLEX ICE-FROST DEPOSITS IN THE TERRITORY OF UKRAINE DURING 1991-2020
Authors:   Boris Sreznevskyi Central Geophysical Observatory of the State Emergency Service of Ukraine, Kyiv, Pyasetska S.I.
Published: November 2023

The article is devoted to the study of the spatio-temporal distribution of cases of mass deposition of complex ice-frost deposits on the territory of Ukraine during the period 1991-2020. The case of mass deposition of complex sediments was considered to be the case when such deposits were observed on at least 10 stations and in at least two regions on one date. The study was conducted for each cold month and individual months of transitional seasons, as well as decades of the studied period separately. The aim of the study was to establish the spatio-temporal features of the mass distribution of cases of complex ice-frost deposits on the territory of Ukraine and to identify the territories under their influence. It has been proven that cases of mass spreading of complex ice-frost deposits are observed during the winter months of January and December. Research has established that: During the studied period (1991-2020), a number of cases of mass spread of complex ice-frost deposits on the territory of Ukraine were established: 3 cases during 1991-2000, 2 cases in 2001-2010, and 6 in 2011-2020. The cases in December 2000, 2010, and 2016, as well as in January 2004, are the most significant in terms of spatial coverage of the territory. Cases of mass spreading of complex ice-frost deposits mostly covered the territories of the central, north-eastern, eastern and southern regions. In the western region, they were mostly observed on the territory of the Carpathian regions and less often in Zakarpattia. With the mass distribution of complex ice-frost deposits during the studied time period, such deposits were most often observed at meteorological stations in the Kirovohrad, Poltava, Donetsk, Odesa regions and the Autonomous Republic of Crimea. It has been proven that the largest contribution (11.8%) to the mass spread of complex ice-frost deposits in December 1991-2000 compared to other regions (5.9%) was made by Luhansk, Donetsk, Kherson regions and the Autonomous Republic of Crimea. In January 2011-2020, Kharkiv and Kirovohrad regions had the largest contribution (14.3%) against 7.1% of other regions. In December 2011-2020, the largest contribution was made by Kirovohrad and Dnipropetrovsk regions (12.5% each), Donetsk (9.4%), as well as Poltava, Kharkiv, Cherkasy, Odesa, and Zaporizhia regions (6.3% each)
Assessing the Impact of Behavioral Activation Therapy on Physiological and Chemical Markers of Depression in Adolescents: A Study in Puducherry Schools
Authors: Sindhumathi R  , Tamilselvi S  , Jeyagowri M  , Madhan Krishnan
Published: November 2023

Background: According to WHO, Sep 2020 reported globally, depression is the leading cause of illness and disability among adolescents aged 15-19 years. Adolescence is a period in which an individual undergoes physical, psychological and cognitive changes. Additionally, the adolescent experiences changes in social expectations and perceptions. This affects how the adolescents feel, think, make decisions, and interact with the world around them. The main aim of the study is to assess the effectiveness of Behavioral Activation Therapy on Bio-physiological and Biochemical measures on Depression among Adolescents. Methods: True experimental research design (Pretest and posttest design) was obtained for this study to check the feasibility of the effectiveness of Behavioral Activation Therapy among adolescents with Mild and Moderate Depression. Demographic variables and a standardized tool Beck Depression Inventory-II (BDI-II) was given to the study participants. The total sample size was 150 adolescents with Mild and Moderate Depression. True experimental research design was used between two group pretest and posttest design). BMI and Salivary Cortisol was calculated prior to the interventions and after the interventions in experimental group and control group. Experimental group received Behavioral Activation Therapy and routine care for control group. Behavioral Activation Therapy involves 10 weeks sessions Situation-mood-activity cycle, solving intruistic issues, social skills training, shaping healthy behaviors, rewards and follow up behavior contract. Theduration of intervention was three months. After three months of duration Post test was conducted in both experimental and control group. The data were analyzed by using descriptive and inferential statistics. Data were tabulated by Sigma plot software.
Biobanking of Endangered Mammalian Gametes and Embryos: A Review
Authors: A. A. Muhammad Nur Kasman  , Ekayanti Mulyawati Kaiin2  , Hany Puspita Aryani  , Faturrahman  , Yuliadi Zamroni  , Islamul Hadi
Published: November 2023

The wealth of fauna resources has a strategic role in realizing the sovereignty and independence of the nation, so it needs to be preserved. Mammals contribute various ecological functions essential to human welfare, including sustaining energy flows and productivity and producing a different kind of biodiversity that is currently approaching extinction yet still exists. Animal biobanking is mostly focused on spermatozoa, oocytes, and embryos in various faunas, which is very relevant and an essential idea for producing healthy and sustainable populations. The quality of reproduction of local fauna with substantial economic value has also been increasingly degraded in recent years, so an accelerated effort in the field of conservation is needed, including integrating the latest technology with conservation efforts. However, the development of biobanking technology for endangered mammals still needs to be improved in its studies and innovations. The authors examine this issue since there is still information that has to be enhanced on the use of reproductive biotechnology techniques that center on the biobanking of animal gametes and embryos, particularly those of endangered mammals. This article provides information on the biobanking of sperm, oocytes, and embryos in endangered mammals.
Determination of markers of lifetime use of substances containing ricin
Authors: Kalekin Roman A. , Barsegyan Samvel S. , Volkova Alla A. , Orlova Alevtina M.
Published: November 2023

BACKGROUND: The problem of establishing the fact of acute and lethal poisoning with cytotoxic substances currently remains an urgent task for forensic medical examination. Ricin belongs to this group of substances and is the most toxic representative, which can have irreversible health consequences if ingested into the human body.

AIM: development of a rapid analysis technique for detecting marker substances when establishing the fact of ricin poisoning in biological objects for the purposes and tasks of forensic medical examination.

MATERIALS AND METHODS: We have described optimal conditions for isolating ricinin and ricinolic acid, as markers of the presence of ricin, from blood and urine for further investigation by modern chromatographic methods (HPLC/MS/MS and GC/MS/MS).

RESULTS: According to the results of the study, an express method for the detection of ricinin and ricinoleic acid in biological fluids, castor oil and castor seeds has been developed, which requires only 200 l of biological fluid. Chromatographic and mass spectrometric characteristics were determined for the subsequent identification of ricinin and ricinolic acid. The authors have established the presence of toxic ricinin in the products of processing of castor seeds, which can be a causal cause of poisoning of people.

CONCLUSION: For the first time, an express technique of forensic chemical and chemical-toxicological examination of ricin poisoning by chromatographic methods - HPLC/MS/MS and GC/MS/MS, based on the determination of marker substances in biological objects ― ricinin and ricinolic acid, is presented.
IMPACT OF POWDER COATING TYPES ON DIMENSIONAL ACCURACY IN OPTICAL 3D SCANNING PROCESS
Authors:   Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, MILDE JAN , DUBNICKA MAROS ,   Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, BURANSKY IVAN ,   Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava
Published: November 2023

This research article aims to investigate the impact of various types of powder coatings on the resulting dimensional accuracy in the optical 3D scanning process. The experimental study utilises the GOM ATOS II Triple Scan scanner with measuring volume MV100 to conduct a series of measurements. Different powder coatings, varying in composition and application area, are sequentially applied to the measured etalon. The digitised data is then imported into the GOM Inspect software, enabling necessary measurements and result evaluation. This paper leverages engineering knowledge and proficiency with the GOM Inspect metrology software. The anticipated outcomes of this experiment are expected to offer novel insights into the influence of diverse powder coatings on dimensional accuracy. These findings can have practical implications across industries where measurement accuracy is crucial. Furthermore, this research can serve as a foundation for future advancements in the field and provide valuable guidance for selecting the appropriate scanning powder for specific optical 3D scanning applications.
BOOLEAN OPERATION-BASED FAST CALCULATION OF CUTTER-WORKPIECE ENGAGEMENT DURING PERIPHERAL MILLING
Authors:   Xi’an Jiaotong University, School of Mechanical Engineering, Wang Xiaoqian , Zhang Xing ,   Xi’an Jiaotong University, School of Mechanical Engineering, Zhang Wei ,   Xi’an Jiaotong University, School of Mechanical Engineering, Zhang Pengfei ,   Xi’an Jiaotong University, School of Mechanical Engineering, Chen Kunhong ,   Xi’an Jiaotong University, School of Mechanical Engineering
Published: November 2023

The cutter-workpiece engagement (CWE) is an important basis for accurately predicting milling force and vibration of machining system, which can be dramatically affected by the complex tool path, variable part allowance and various tool profiles. The paper presents a fast calculation method of CWE during peripheral milling process based on the Boolean operation. A second-developed simulation environment embedded the kernel program with the aid of commercial CAM is established. In the computing model, the locally past-cut material entity of the workpiece is replaced by a set of neighboring tools, and the geometric entity of CWE is quickly obtained through the Boolean operation between the tool, workpiece blank, and past-cut entities. The instantaneous uncut chip thickness (IUCT) is further obtained after extracting the tooth start and end cutting angles. Thanks to the first-order computation time complexity, the method has a significant advantage of fast computing speed when compared to the traditional method with a globally updated workpiece. In the milling case of S-shaped workpiece, the results indicate that the method can effectively calculate the CWE status along the entire tool path, and achieve the fast prediction of milling force under a long-time machining condition.
CHATTER DETECTION IN VIBRATION SIGNALS USING TIME-FREQUENCY ANALYSIS
Authors:   Xi’an Jiaotong University, National and Local Joint Engineering Research Center of Equipment Operation Safety and Intelligent Monitoring, Matthew Dialoke Ejiofor , Shi Jianghai ,   Xi’an Jiaotong University, National and Local Joint Engineering Research Center of Equipment Operation Safety and Intelligent Monitoring, Hou Maxiao ,   Xi’an Jiaotong University, National and Local Joint Engineering Research Center of Equipment Operation Safety and Intelligent Monitoring, Cao Hongrui ,   Xi’an Jiaotong University, National and Local Joint Engineering Research Center of Equipment Operation Safety and Intelligent Monitoring
Published: November 2023

Chatter is a common state in the end milling, which has major influence on machining quality. Early chatter detection is a prerequisite for taking adequate measures to avoid chatter. Nevertheless, there are still numerous challenges and difficulties in the feature extraction of chatter detection. In this paper, effective chatter detection in the milling process of a vibration signal is investigated using time frequency analysis. Firstly, the measured vibration signal in the machining process was preprocessed by Wavelet Transform decomposition. Different sub-bands were obtained and the portion with high chatter information was reconstructed for further analysis. Since measured signals from sensors usually constitute of background noise and other disturbances, the wavelet decomposition serves as a preprocessor to denoise the measured signals and enhance the performance of the Wavelet Synchro Squeezing Transform (WSST) which was applied on the reconstructed signal for chatter Identification. The techniques were used to detect the chatter in different operating condition of the machining process. Finally, some milling tests were conducted and the experiment results prove that the proposed method indeed succeed in effectively chatter identification.
RELATIONSHIP BETWEEN FATIGUE PROPERTIES AND CUTTING PERFORMANCES OF BILAYER TISIN/TIALN TOOL COATING
Authors:   Shandong University, Key Laboratory for High Efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering, Wang T. , Qi X. ,   Weichai Power Co., Ltd., Wang Y. ,   Weichai Power Co., Ltd., Ma W. ,   Weichai Power Co., Ltd., Yan L. ,   National Huaqiao University, Institute of Manufacturing Engineering, Zhang S. ,   Shandong University, Key Laboratory for High Efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering
Published: November 2023

Impact test is a universal method to characterize the fatigue property of coated tools. For the bilayer TiSiN/TiAlN coated tool, the stress state in the cutting process with different feed rates were explored through cutting experiments. A high-temperature and high-frequency impact test platform was built. Through the impact tests with the introduction of the ‘pre-loading depth’, the fatigue properties and failure mechanisms of coatings under various test conditions were analyzed. Based on the comparative analysis of the results obtained in cutting experiments and impact tests, the mapping relationship between fatigue properties and cutting performances of the coatings was established, thus providing theory and practice foundation for characterization the cutting performance of coated tools under different cutting parameters by high-temperature and high-frequency impact tests.
CHATTER SUPPRESSION FOR ROBOTIC MILLING USING A NOVEL MAGNETORHEOLOGICAL FLUID ABSORBER
Authors:   School of Mechanical Engineering, Xi’an Jiaotong University, Hou Maxiao , Shi Jianghai ,   School of Mechanical Engineering, Xi’an Jiaotong University, Cao Hongrui ,   School of Mechanical Engineering, Xi’an Jiaotong University
Published: November 2023

Industrial robots are more compliant than CNC machine tools, which makes them prone to chatter during robotic milling. Chatter has slowed down the adoption or sometimes inhibited the use of robots for machining tasks. This work presents a new chatter suppression scheme by mounting a magnetorheological fluid (MRF) absorber on the spindle housing to absorb the vibration with a specific frequency range. Firstly, a Gaussian process regression (GPR) model is used to predict the modal parameters at different machining positions. Subsequently, the predicted modal parameters are employed as input to obtain the transfer matrix for chatter frequency calculation. After that, a novel MRF absorber is designed based on the controllable shear modulus of the MRF in its pre-yield region. The simulation verifies that the designed MRF absorber can suppress chatter and thus improve the surface quality of the workpiece.
INFLUENCE OF HEAT TREATMENT AND DIFFERENT CUTTING CONDITIONS ON THE MACHINABILITY IN ADDITIVE-SUBTRACTIVE PROCESSING
Authors:   RPTU Kaiserslautern, Institute for Manufacturing Technology and Production Systems, Steiner-Stark J. , Zimmermann M. ,   RPTU Kaiserslautern, Institute for Manufacturing Technology and Production Systems, Platz J. ,   RPTU Kaiserslautern, Institute for Manufacturing Technology and Production Systems, Kirsch B. ,   RPTU Kaiserslautern, Institute for Manufacturing Technology and Production Systems, Aurich J. C. ,   RPTU Kaiserslautern, Institute for Manufacturing Technology and Production Systems
Published: November 2023

For many applications, the surface quality, geometric accuracy and stress state of parts produced using laser-based powder bed fusion (PBF-LB) are insufficient. A stress relief and machining as post-processing operations allow to overcome these issues. PBF-LB materials have a unique microstructure. Their machinability therefore differs from that of cast or wrought materials. The microstructure can be altered by a stress relief heat treatment, which can change the machinability further. In this paper, the machinability of AlSi10Mg parts in the as-built condition and stress relieved condition is examined when wet and dry peripheral milling with cutting speeds up to 1,000 m/min. The PBF-LB parts were manufactured in different build-up directions. The stress relief decreased the material microhardness by approximately 16 %. This lower microhardness did not significantly affect the process forces but influenced the surface characteristics. The best surface quality was achieved when milling with the highest considered cutting speed of 1,000 m/min and when using metalworking fluids. Particularly the number of surface defects such as the smearing of material could thus be reduced. For the as-built conditions, good surface qualities can be achieved in dry cutting with high cutting speeds.
Retro is the new modern: Contemporary application of gold impregnation staining on brain cryosections for digital image analysis
Authors: Rođak Edi , Zjalić Milorad , Cibok Sara , Viland Sven , Heffer Marija , Grgac Robert , Belovari Tatjana , Oršolić Nada , Bijelić Nikola
Published: November 2023

Background and purpose: Since the times of Golgi and Cajal, impregnation with gold or silver has been used to visualize microscopic details of the nervous tissue. Although immunohistochemistry has largely replaced impregnation techniques, they are still used, and there is a growing interest in combining them with modern image analysis methods for quantitative studies in neuroscience. The aim of this research was to modify the gold chloride impregnation method published by Schmued to improve consistency of staining, to be adequate for digital image analysis.
Materials and methods: Brains of 8 six-month-old female Wistar rats were fixed in 4% PFA, cryoprotected in sucrose and flash‑frozen in liquid nitrogen. Neighboring sets of coronal sections were chosen for gold impregnation, Nissl staining and MAP2 immunohistochemistry. Whole-slide images and images of specific regions were taken for analysis.
Results: Myelinated fibers were stained dark reddish to brown on goldstained sections, and other tissue was yellowish, which gave an excellent contrast for digital image analysis. Gold staining was consistent in all regions, and no major artifacts were noticed. When compared to Nissl and MAP2, only myelinated structures were stained with gold impregnation.
Conclusions: Modified gold impregnation method is an alternative that’s on par with traditional myelin staining methods. The new, modified gold impregnation method gives a consistent and reproducible staining suitable for digital image analysis. It can be useful in morphometric evaluation of nervous tissue and investigation of neuropathological changes in nervous tissue, especially for quantitative studies.
Effect of patanjali yoga sutra on personality development: A randomized controlled trial
Authors: Kumari Nandani , Maurya Sushma , Negi Kavita
Published: November 2023

The Yoga Sutras of Patanjali describes a wise process of living that promotes balance and harmony. The study evaluates the personality development or positive changes from the physical to the spiritual through the Patanjali Yoga Sutra.

A randomized controlled trial included 200 participants (age – 21-25 yrs.), both gender physically fit for the yoga module. Participants were undergraduate students from Ambala, Haryana. Participants were equally randomized to each group (100). The researcher used structured and planned intervention methods for the experiments—the practice of techniques given in Tools for data collection werestructured questionnaires (Demographic data), Vedic Personality Inventory (VPI), andageneral health questionnaire (GHQ-28).

Results were analyzed as per intention to treat analysis. and GHQ's Total scores differed statistically significantly (p-value < 0.000) in both groups. We found greater improvement in the YG compared to the CG. Sattva score in YG increased dramatically from 30.70 (8.635) to 49.99 (15.137), simultaneously increasing from 30.01 (10.508) to 41.94 (13.667) in CG. ' score in YG significantly reduced from 37.12 (13.318) to 27.68 (9.043) and decreased significantly from 41.94 (13.966) to 30.01 (10.508) in CG. Tamas's score in YG significantly reduced from 37.22 (10.669) to 22.34 (10.780), whereas it was the same as 28.20 (10.453) in CG.

The results have shown that practice has improved the personality of young, healthy volunteers by increasing their Sattva Guna and reducing their and
Study of and isolated from edible leafy greens
Authors: Bhattacharyya Sayan , Kabiraj Ankush , Lahiri Shibani
Published: November 2023

Tulsi, Mint and Spinach all are leafy greens. They have tremendous medicinal properties thus they are used as culinary herbs or sometimes consumed as raw. Although sometimes they caused health issues due to presence of some enteropathogenic bacteria.

: In this study we are tried to identify the enteropathogens and through different types of laboratory examinations.

: We looked for the enteropathogens and in Tulsi, mint and spinach leaves via different types of laboratory techniques. Many of these leaves contained th3ese pathogens which can be harmful if ingested by the oral route.

: Enteropathogenic bacteria can often be found in edible leafy greens and this should be of public health concern.
Approach Paper: Extended Country Program Evaluation: Barbados, 2015-2023
Authors: Pedraza Lina , Fleiss Pablo , Anderson Alonso Anais Maria , King Julie , Soriano Alejandro , Pérez Gabriela
Published: November 2023

This approach paper describes the evaluation methodology and criteria, evaluation questions, and the team and indicative timeline for preparation of the Barbados XCPE, which will cover the period 2015-2023, corresponding to the CS 2015-2018 and CS 2019-2023. The document is structured into five sections and one annex that provide supplementary information. Following this introduction, Section II describes the country's context, its development challenges, and the government's priorities, while Section III describes the country strategies approved by the IDB Group over the 2015-2023 period, together with the country program or portfolio under evaluation. Section IV describes the evaluation methodology and criteria, and Section V provides details of the team and timeline.
US-Saudi relations under President Biden: trends, problems and prospects
Authors: Bobkin Nikolay
Published: November 2023

The Biden administration does not yet appear to have an active strategy to counter Saudi Arabia's shift towards greater autonomy in the Middle East. The article attempts to answer the question of whether it is possible in the near future to restore full-fledged allied relations between Washington and Riyadh. The attitude of the US president to the royal family is assessed, it is emphasized that the personal hostility of Biden and Mohammed bin Salman exacerbates strategic differences based on a change in the geopolitical and geo-economic orientations of both countries. It is shown that the diplomatic efforts undertaken by the United States at the highest level did not lead to reconciliation. The consequences of the Saudi-Iranian rapprochement on the Middle East conflicts and their impact on the US position in the region are assessed.
US - Great Britain Economic Relations
Authors: Davydov Andrey
Published: November 2023

This article covers the major trends of United States and Great Britain economic relations. Economic cooperation between these countries is closely connected with the phenomenon of “special relationships” in the political field. Sources and main points of the “special relationships” are being analyzed in the article. British departure from the European Union created possibilities to develop further economic cooperation between the United States and the United Kingdom. Negotiations on free trade agreement started under Donald Trump administration but were frozen under current US administration. In the result UK proved to be between Scylla and Charybdis. The article covers major trends of structural changes in mutual trade and investment flows during last decade. Statistical analysis shows that oil and natural gas are the major articles of US export to Great Britain. United Kingdom is exporting transport equipment, chemicals and different types of machinery. Different services (professional, business, finance and science) are also important for mutual cooperation. Current investment positions of both countries are being analyzed. Great Britain is interested to get American direct investment in different fields. UK big holding companies are the major target of US direct investors. British equities are also in great demand on the global financial market.  Most of British capitals are invested in manufacturing companies of the US. Current situation with free trade negotiations is being analyzed. President John Baiden administration realizes conservative economic policy. US conservative policy is aimed to support national producers. In view of the above it is highly likely that trade negotiations between US and UK will not be in progress for a long period.