bluuebunny/crossref_metadata_2025 huggingface dataset:
Identificación y repartición de hábitats utilizados por anfibios en cinco coberturas asociadas a bosque seco tropical, Dibulla, La Guajira
Authors: Acuña-Vargas Julio César , Camargo-Gonzáles Laidis Tatiana , Bastidas-Molina Bienvenido
Published: January 2024

El presente estudio se desarrolló para determinar la composición y repartición de hábitats de encuentro para 20 especies de anfibios en cinco coberturas de la tierra con diferente grado de perturbación, en un área rural del municipio de Dibulla, La Guajira. Durante ocho meses se realizaron 40 muestreos, empleando la técnica estandarizada para el estudio de anfibios de relevamiento por encuentros visuales (REV) en las coberturas de estudio, sobre un área aproximada de 20 km2. Se registraron 38 hábitats distribuidos en las cinco coberturas, siendo la cobertura de mosaico de pastos y cultivos transitorios inundables, no arbolado con setos de árboles y arbustos (MPC) la cobertura con mayor oferta de hábitat (29), mientras que la cobertura con mayor riqueza de especies (19 sp.) fue tejido urbano discontinuo (ZU) y la de mayor abundancia (3068 individuos) fue la cobertura de Palma de aceite (CP). Se observaron diferencias entre las coberturas de la tierra, hábitat de encuentro y la riqueza de anfibios (H: 48,77; p-valor < 0,05), y abundancia de anfibios (H: 49,74; p-valor < 0,05). Se observa solapamiento espacial alto (>0,75) entre pares de especies relacionadas con sus hábitos y entre especies de la misma familia. Aunque las coberturas comparten una alta proporción de hábitats de encuentro, presentan comunidades de anfibios con diferentes características en su estructura y composición. Asimismo, aun cuando las comunidades sean compuestas por especies consideradas como generalistas, de amplia distribución y tolerantes a la perturbación, las especies utilizan los hábitats debido a condiciones más complejas que su oferta. Destaca que algunas especies registran preferencia por algunas características que ofertan algunos tipos de hábitats, independientemente de la cobertura o uso del suelo.
Household Water Consumption and Tariff Structure: The Analysis of Türkiye’s Three Metropolitan Cities
Authors: GÜVEN Mahmut Akif , BAŞARAN Alparslan Abdurrahman
Published: January 2024

Analysis of urban water management has been researched in several countries. However, the attention given to this subject in Türkiye remains limited. This study addresses this research gap by focusing on the analysis of water tariffs, a critical tool for urban water management policies of local governments in Türkiye. The research aim is to investigate issues related to the attributes widely studied globally when the Türkiye case is considered. The study utilises a dataset from the Household Budget Survey of the Turkish Statistical Institute (TÜİK) between 2015 and 2018. The research has two folds. First, household water tariffs, average water prices, water consumption levels, and household characteristics are comprehensively examined in three metropolitan cities of Türkiye, namely, İstanbul, Ankara, and İzmir. Secondly, water consumption data is compiled from diverse geographical regions worldwide and compared with the ones in Türkiye. The findings reveal that the accessibility to clean water and the financial burden of clean water on household budgets, particularly for low-income households in Türkiye, are notably disadvantaged compared to many developed countries.
All soul is immortal (Plato)
Authors: Tapavički-Ilić Milica , Alihodžić Timka
Published: January 2024

In this paper, the authors dealt with the idea of souls of the deceased taking a journey from and back into our known world. In order to achieve this, a soul would need light to reach the Afterlife, but also some light to return safely. The idea of a souls’ return journey was debated by several ancient philosophers, among others Plato and Cicero. One pos-sible material manifestation of this idea is the fact that many times, oil-lamps were placed into graves that had never been used before, as well as those that were placed into graves upside-down. The motifs depicted on the deposited oil-lamps were possibly meant to encourage the deceased to take the journey back, while some were meant to make them remember this life easier and become eager to come back. Also, oil containers (jugs) that were deposited as grave-goods contain large amounts of oil, which might also be explained with the idea that a soul was expected to go to the Afterlife, but also come back and use all of the oil.
Thinking Outside the Box from The Perspective of a Malaysian School Administrator During A Pandemic as A New Educational Form
Authors: Mohammad Nazeri , Jais Arshad
Published: January 2024

The purpose of this study was to describe Out of the Box from Malaysian School Administrators’ Perspective During Pandemic. We did a literature review to explain this matter. We believe that this study can be used as a reference for the education perspective.
Economies and Management as A Result of The Fourth Industrial Revolution: An Education Perspective
Authors: Shaturaev Jakhongir
Published: January 2024

The fourth industrial era (or Industry 4.0) refers to the recent trend of massive data collection, analysis, and communication with intense process automation. Massive studies have been conducted in this field, though with the main focus on technical details, hardware, and software. There remains a considerable gap in the analysis of the potential effects of the Fourth Industrial Revolution on economies and management. According to recent studies, from 45% to 60% of jobs around the globe are at risk of being automated or computerized. Although new jobs such as automation engineers, programmers, data analysts, and others are being created, the economies would get a significant amount of workforce lacking the necessary qualifications. A causal model that shows the effect of increasing automation on economies has been developed and discusses potential implications. The paper suggests that economies and organizations would have to adopt “Algorithmic Management” to remain competitive in the new digital environment. This paper can be a reference, especially from an education perspective.
Policy for Distance Learning in Education in Higher Education Institutions: Experiences from Sudan
Authors: Onia Saifaldin Idris , Rmadan Amel Farage
Published: January 2024

The introduction of distance learning in education in universities has transferred the competition between them to a higher, global level also. However, Sudan is one of the African countries, suffering from many challenges that are related to technology such as poor network, lack of awareness, lack of commitment of institutions and instructors, and lack of network coverage to the remote areas. Therefore, this paper aimed to review the initiative of distance education in some Sudanese universities. In doing so, this paper followed a qualitative research approach to the type of case study research. The information for this study was derived from articles, books, online sources, reports, and documents. The paper reviewed distance education policy in some Sudanese Universities Such as the Open University of Sudan, University of Khartoum, Sudan University of Science and Technology, Al-Neelain University, and Al-Zaeem Al-Azhari University. It was normal that universities in Sudan needed to introduce their teachers and students to such distance education programs to achieve more excellence in teaching and learning. The paper suggests college officials should adopt policies to implement distance education in Sudanese universities.
Scientific Approach to Enhance Scientific Literacy of Junior High School Students: Domain of Competence
Authors: Nugraha Muhamad Gina
Published: January 2024

Scientific literacy (LS) is the ability to engage with science-related issues, and with the ideas of science, as a reflective citizen. Thus, some developed countries provide policies, making that LS capabilities are provided to school curricula. However, some research reveals that this alleged ability has not been optimally provided in science learning, thus, students' LS abilities are still low. Pre-experimental research with a one-group pre-test-post-test design aims to get an overview of increasing LS capabilities in the competency domain through the application of a scientific approach. The study was conducted in one of the public schools in the city of Bandung using 30 samples taken randomly. The effectiveness of the increase was measured using the normalized gain value g on 20 essay questions with validity test results of 0.77, and reliability of 0.87. The results showed an increase in the K1 aspect (explaining scientific phenomena) g= 0.75 (high category), an increase in the K2 aspect (evaluating and designing scientific research) g= 0.46 (medium category), while an increase in the K3 aspect (interpreting data and evidence) g= 0.15 (low category). This shows the need for a mentorship process to build epistemic knowledge in analyzing and inferring experimental data in a scientific approach.
Career Choice: A Case Study of College Students Shifting Career Paths
Authors: Lao Genebelle M. , Villamayor Desiree Janine F. , Campos Finlay Whea H. , Dasmariñas Hanz Alecz Q. , Dechavez Jean Paul D. , Biadoma-Toledo Candellen
Published: January 2024

This study aimed to determine the causes, impacts, and varying perspectives of how two years of education can alter a person's ambitions. A qualitative research design, specifically the case study approach was used in this study. It focused on why the participants enrolled in a college program that was not aligned with their SHS Strand. The responses are subsequently transcribed and themes are identified. Students whose college courses do not correspond to their Senior High School strands have questioned their previous strand selection. This is due to difficulties they encountered as a result of the misalignment. According to the general findings, one of the most important factors to consider when choosing a career is one's interest. It was also evident within the data presented that the finances and practicality of the predetermined college courses that the students chose were weighed into their decision-making. It also shows that the majority of the participants agreed that their families have an impact on their career choices. The study also discovered that doing things that are not one's passion in the first place can be difficult, but it can help people challenge their abilities. The study concludes that indeed, pre-coaching strategies and guidance provided by schools play a large factor in students' awareness of their strengths and weaknesses. Also, setting goals may make the desired changes more difficult; however, the participants rediscovered their inclination and satisfaction with what they have pursued now, which motivated them to continue.
Demographic Factors and Test Anxiety among Secondary School Students
Authors: Omoyemiju Michael Adeniyi
Published: January 2024

The purpose of this study was to determine the level of test anxiety among secondary school students in Ilesa East Local Government Area (LGA) of Osun State, Nigeria. It also examined the association between students’ demographic factors and test anxiety in the study area. The study population comprised all Senior Secondary School (SSS) III students in the LGA. A sample of 240 students was selected by stratified sampling technique using school ownership (public and private) as a stratum. An adapted questionnaire titled Students’ Test and Examination Anxiety Measure (STEAM) was used to collect data for the study. The result showed that 50.8% of the respondents had a low level of test anxiety while 49.2% of respondents have a high level of test anxiety, and there was no statistically significant influence on students’ gender (Wald Χ2 = 0. 000, p 0.05) on test anxiety. The study concluded that test anxiety is a physiological condition commonly exhibited by students irrespective of gender. It is recommended that any policy intervention programme to be developed either by the government or private organizations must not be gender biased.
Six Points a Legacy of Historic Events in Bangladesh: An Education Perspective
Authors: Karmaker Ritesh , Malaker Shamoly
Published: January 2024

The purpose of this article show that Six-Point has been a prime political Impetus created by Bangabandhu Sheikh Mujibur Rahman, the father of the nation. In it, he has risen the importance of rights to be ensured for the people of Bengal who were deprived of their rights and struggling to lead a secure life and rightful position. This demand raised by Bangabandhu is a leading political issue that even smoothens the achievement of independence. Bangabandhu points out the demands after being deprived of the rights known asthe Charter of Freedom. So, he raises the demands and gives the Bengalis a road to be walked for the rights of their liberty. These points are the first political achievement of Bengalis through the demands raised by Bangabandhu. In this article, a qualitative approach has been poured and the significance of Six-Point has been seen in gathering data from Sherpur, Bangladesh. The Six-Point Movement has whirled the spirit inside the mind of the Bengalis and led them to further achievement and independence. The Six Points paced up other movements until they gain their liberty. The necessity of such demand is very much required for the momentum of the Bengalis of East Pakistan then and Bangabandhu holds the reasons of the Six -Point Movement for giving Bengalis the rights becoming rightful for ensuring their deprived rights in the demands, Six-Point Movement.
Student's Willingness and Perception Towards Online Teaching and Learning Through the Psychoeducational Group Counseling Approach
Authors: Masandal Marryanah , Bakar Abu Yazid Abu
Published: January 2024

This study aims to assess the willingness and perception of students toward online teaching and the learning process among students through a psychoeducational group counseling approach. This study was carried out due to the occurrence of several psychological issues among respondents, including the difficulty of giving focus to the activities of teaching and learning online. The design of this study is in methodical way, namely by running four group counseling sessions through a psychoeducational approach. The method used to get information from these group counseling sessions is by using related modules such as Introduction Session, Strengths-Weaknesses-Opportunities-Threats (SWOT) Analysis, a Day in Life (as a Time Management), and Fantasy of Success. The study found that, despite some identified constraints, online teaching and learning are still preferred by the respondents in terms of their willingness and perception to embrace this new norm of the teaching and learning process.
Greening the Internet of Things: A Comprehensive Review of Sustainable IoT Solutions from An Educational Perspective
Authors: Jebur Tuka Kareem
Published: January 2024

Green IoT, or the use of Internet of Things (IoT) technologies to promote sustainability and reduce environmental impact, has gained increasing attention in recent years. The purpose of this paper is to increase awareness about the environmental effect of IoT and to share insights and ideas for making IoT more sustainable and contributing to a more environmentally friendly future. The paper discusses the benefits and challenges of using solar, wind, and other renewable energy sources in IoT applications, as well as the use of sensors, data analytics, and machine learning to optimize resource usage and monitor environmental conditions. The key findings of this paper indicate that Green IoT has the potential to play a significant role in addressing environmental challenges, such as climate change and resource depletion. However, there are still many challenges that need to be addressed, including the high cost of renewable energy sources and the complexity of managing large -scale IoT networks. Overall, this paper emphasizes the importance of Green IoT and the need for further research to develop more efficient and sustainable IoT solutions.
Design of Emergency Position Reporting System for Disasters Using Amateur Radio and Automatic Packet Reporting System (APRS) as a Mobile Station Operator for Educational Purposes
Authors: Un Sok Oeun , Po Kimtho , Thourn Kosorl , Pec Rathna , Srun Channareth , Siren Seven
Published: January 2024

The emergency position reporting system is proposed for disasters using amateur radio and Automatic Packet Reporting System (APRS) as mobile station operators for unexpected natural disasters after the Internet and mobile communication system infrastructure are destroyed surrounding the disaster areas. In this work, the objectives are to report and receive position information on emergency use with Amateur Radio and APRS as a Mobile Station Operator. The location tracking systems are used with amateur radio devices and implemented with APRS in the act of position reports. The position information is received from the smartphone’s Global Positioning System (GPS) using the offline mode to the APRS via Bluetooth network that is connected to transceivers. The transceiver used the dual-band Yagi antenna 145Mhz/435Mhz called Mobile Station Operator (MSO) as the APRS client using callsign. The MSO collected the location data sent to the Response Station Operator (RSO) that combined with APRS, transceivers, and antenna. The server system allowed data location information monitoring using a valid passcode from a licensed amateur radio operator and used strictly by the servers to validate the connection to the server application.
Development of Folk-Dance Videos for E-learning
Authors: Llupar Mikee L. , Malones Lorie Jean L. , Sombria Alden Jay F. , Calixtro Vivencio L.
Published: January 2024

This study was geared towards the development of folk-dance videos for e-learning through folk dance tutorial videos for physical education instructors and folk-dance trainers/choreographers to determine the level of development in terms of acceptability, usability, and relevance. The study utilized a descriptive survey design which allows us to reveal the level of development of the developed folk dance videos for e-learning. We also developed a dance that had been used as a video tutorial wherein we have performed and recorded for the respondents to follow. A survey questionnaire was done to know what is the level of development of the developed and validated folk dance videos for e-learning. Findings revealed that the folk-dance videos for e-learning developed by we are excellent and meet above 75-90% acceptability, usability, and relevance standards. This study can conclude that the developed videos for e-learning were an effective tool in teaching dance to the students wherein the developed videos are acceptable, useful and relevant. It gives opportunity for the physical education instructors and folk-dance trainers/choreographers to have their time to develop their dance skills and it would lessen their task to teach students because the video is pre-recorded and their students can learn from it without them physically.
Learning Mathematics Formulas by Listening and Reading Worked Examples
Authors: Maryati Wahyuni Eka , Retnowati Endah , Thoe Ng Khar
Published: January 2024

This study aims to examine whether there is a significant difference between the effectiveness of worked examples with voice notes and worked examples without voice notes and their relations with computational thinking skills. Both learning strategies were implemented in the derivative of polynomial algebraic function learning. This quasi-experimental study involved 62 students and employed a pre-test and post-test non-equivalent control group design via WhatsApp group. Data were analyzed using ANCOVA with student initial ability measured during the pretest as the covariate. The study empirically proved that there is a significant difference in terms of the effectiveness of both learning strategies viewed from student cognitive load. Worked example without voice notes was more effective and makes students have less cognitive load during learning. In addition, there was no significant difference in the effectiveness of learning strategies in terms of computational thinking skills. This study showed that adding voice notes may lead to redundancy effects, hence the use voice notes with worked examples should be thoroughly considerated.
Rural-Urban Migration Among Women Farmers: Science Education, Survey, and Implication for Food Crop Production in Cross River State, Nigeria
Authors: Effiong J. B. , Aya C. F.
Published: January 2024

The main objectives of the study were to: identify the socio-economic characteristics of the respondents, assess factors influencing women’s food production activities and identify measures for reducing rural-urban migration among women farmers in the study area. A sample size of 200 farmers was randomly selected for the study. Data were collected using a set of structured questionnaires and interview schedules. The result obtained showed that most of the farmers were between the ages of 51-60 years (50.0%). Farmers’ levels of education were the non-formal level of education (45.0%), primary level of education (35.0%), and secondary level of education (15%). Farming was their major occupation (52.5%) and trading (40.0%). 8-10 household size was the highest which promotes labour within the family (40.0%), 11 and above (30.0%). Family labour was the main source of labour supply (75.0%), and exchange labour (22.5%). Factors influencing women’s crop production activities were lack of fertile farmland, old age, active engagement in domestic activities, and high cost of farm inputs, which were 22.5, 17.5, 13.5, and 11.5%, respectively. The findings showed that mechanization can reduce migration among women farmers. The study recommended that government should mechanise agriculture, loans should be given to corporative farmers while land tenure system should be reviewed to favour farming which will also help to reduce rural-urban migration among women farmers in Cross River State, Nigeria.
Science Teachers’ Lived Experiences and Challenges during COVID-19 Pandemic
Authors: Pandoy Lordjan Kenneth L. , Diaz Zea Oryza May H. , Salem Kristine Jane G. , Damaso Junalen M. , Cabaylo Rey M. , Abo Christine P.
Published: January 2024

COVID-19 pandemic has negatively affected all areas of lifestyle, especially the education sector, from both the students' and teachers' points of view. As we are all concerned with students' difficulties, this study focuses on teachers' lived experiences and challenges and their adaptive strategies in class operations, especially in teaching Science Education. This study is interview-based data instrumentation as it is a phenomenological type of research exploring the lived experiences of Science teachers. Lived experiences, challenges, and adaptive strategies are the thematic base of the data. Findings revealed that (1) there are three core themes under the lived experiences of Science teachers, including building relations, call of duty, and instruction reconstruction. (2) Science teachers were also mostly challenged during distance learning during the COVID-19 pandemic, including the authenticity of students' outputs, instruction delivery, internet connectivity, lack of resources, safety, and topography, which resulted in the difficulty of Science class operation. Despite the lived experiences and challenges brought by distance learning, (3) they learned to possess adaptability, accept assistance, be flexible and innovative, manage time, and use a specialized strategy or radio-based instructions. The study recommends that Science teachers exert extra effort, be resourceful, and cope with digital divides such as attending seminars and workshops to better utilize opportunities in distance learning. They must possess a positive outlook in every way possible. The higher office of the education sector initiates adaptive strategies for teachers.
A Study on The Impact of Paper Leaks on Students
Authors: Kamraju M.
Published: January 2024

This research study examines the impact of paper leaks on students in India. The study explores the causes and effects of paper leaks, legal and ethical implications, and prevention measures. The research design involves a quantitative approach with a survey as the data collection method. The sample size includes 500 students from various academic levels and institutions. The results indicate that paper leaks have a significant negative impact on student's academic performance, psychological well-being, and trust in the education system. The study highlights the need for stricter security measures, increased vigilance, and penalties for those involved in paper leaks.
The Effect of Bamboo Dancing Learning Method on Interest, Motivation, and Learning Outcomes in Electricity Law
Authors: Nugroho Widhi Dwi , Irwanto I. , Cahyono Bagus Dwi
Published: January 2024

This study aimed to determine the effect of bamboo dancing learning on the learning interest of industrial electronics engineering students and the effect of bamboo dancing learning methods on students' interest in studying electricity law. Students in tenth grade have demonstrated increased interest, motivation, and learning outcomes in industrial electronics engineering courses taught using the bamboo dancing method. The research utilized a quasi-experimental design, and the experimental method employed a control group design with non-equivalent participants. The findings demonstrated several points: (i) the bamboo dancing learning method does not affect interest, (ii) the bamboo dancing affects student motivation, and (iii) the bamboo dancing method affects the learning outcomes of the laws of electricity. The experimental class increased the learning outcomes of students who participated in learning the material of the law of electricity. The bamboo dancing method increased students' interest, motivation, and academic achievement.
Science Process Skills Test Instruments in The New Indonesian Curriculum (Merdeka): Physics Subject in Renewable Energy Topic
Authors: Susilowati Nisfullail Indah , Liliawati Winny , Rusdiana Dadi
Published: January 2024

The physics subject in the Merdeka Curriculum is organized into two categories, understanding physics and process skills. The physics process skills assessment instruments used by teachers in the field are not appropriate in terms of assessment methods and the assessment tends to be subjective. This study aims to develop a science process skills test instrument in physics learning for high school students, on the topic of Renewable Energy. The method used in this research is development research. The instrument was developed with the Extended Written Response method, essay-type questions consisting of fifteen written test items. Indicators of science process skills developed are observing, questioning and predicting, planning and conducting investigations, processing, analyzing data and information, creating, evaluating and reflecting, and communicating. The stages of developing this test instrument are making indicators of questions, making questions, judgments by topic experts and assessment experts, revising questions, testing, revising questions, and implementing questions at school. The results showed that the test instrument developed was suitable for use as a process skills test instrument on the Renewable Energy topic.
Design and Harmonic Elimination of sinusoidal pulse width modulation (SPWM) Based Five Level Cascaded H-Bridge Multilevel Inverter for Photovoltaic System for Educational Purposes
Authors: Ganthia Bibhu Prasad , Praveen B. M.
Published: January 2024

In this modern era, the electrical power system faces a shortage of fossil fuel-based energy sources. To overcome this problem, people more focus on giving towards renewable energy sources like solar energy, wind energy, and nuclear energy sources. This also can be used to overcome global warming and reduce pollution by fossil fuels. This study used a photovoltaic (PV) array to give supply to the Multilevel Inverter (MLI) with different irradiance values, which can be used for educational purposes. The sinusoidal pulse width modulation (SPWM) method is used here to control the converter. SPWM technique is the easiest technique than the other types of pulse width modulation (PWM) technique. In this technique the switching loss is very low, therefore efficiency is high. After the simulation, the output waveforms are similar to the sinusoidal waveform for the resistive load. In this topology, after simulation, the total harmonic distortion (THD) contents were found to be less by using an LC filter. The model is simulated in MATLAB/Simulink. The analysis of output voltage waveforms is discussed with the reduced THD.
State of Instructional Educational Facilities of Primary Education at Upazila Level
Authors: Alam Md. Jahangir , Haque A.K.M. Mahmudul , Kamruzzaman Muhammad , Hossain Imran
Published: January 2024

Primary education is a basic education for all, which depends on different agencies and factors to ensure its quality. The study assessed the state of instructional facilities in primary education at the Upazila level in Bangladesh. An explanatory sequential design and mixed methods have been used in this study. The researcher has collected quantitative data by surveying primary school head teachers and selected schools from two upazilas: Charghat in Rajshahi and Sundargonj in Gaibandha District. The sample for the study was determined by stratified and simple random sampling. The total schools were 12 and 42 in both study areas. Through different interviews, questionnaire surveys, and document reviews, the researcher has explored the scenario of instructional educational facilities and provided suggestions to ensure quality primary education. The study finds that the Upazila Education Office should be at the vanguard of achieving quality primary education by ensuring the excellence of the school environment through instructional facilities with the help of the government, School Management Committee (SMC), Parent-Teacher Association (PTA), and communities. Overall, the government should prioritize investing in the improvement of instructional facilities in primary schools, as it directly impacts the quality of education and the ultimate academic performance of the students.
Kızılçam (Pinus brutia Ten.) endüstriyel ağaçlandırmalarında farklı arazi hazırlığı, aralık-mesafe ve ekim-dikim yöntemlerinin büyüme üzerine etkileri
Authors: Fidan Cemal , Erkan Neşat , Demirsu Necat , Cabak Erol
Published: January 2024

Çalışma, kızılçam endüstriyel ağaçlandırmalarında arazi hazırlığı, aralık-mesafe ve ekim-dikim yöntemlerinin fidan boy büyümesi (FBB) ve fidan yaşama yüzdesine (FYY) etkilerini ortaya koymak amacıyla yapılmıştır. Araştırma üç farklı yerde (Balıkesir/Savaştepe, Aydın/Karacasu ve Muğla/Seydikemer) faktöriyel deneme desenine göre, bloklarda bölünmüş parseller şeklinde ve 3 yinelemeli olarak kurulmuştur. Veri analizlerinde SPSS paket programı kullanılmış ve bağımsız örneklem t-Testi uygulanmıştır. Sonuçlara göre; çukur şeklinde toprak işleme (ÇUTİ) ve tam alan toprak işlemesi (TATİ) yapılan parsellere dikilen fidanlarda FYY arasında Karacasu ve Savaştepe deneme alanlarında fark yokken Seydikemer deneme alanında fark bulunmuştur. FYY dikim yapılan alanlarda ekimlere oranla daha yüksek bulunmuştur. Arazi hazırlık işlemleri arasında Karacasu ve Seydikemer deneme alanlarında boy gelişimleri bakımından farklılaşma önemli, Savaştepe deneme alanında ise önemsiz bulunmuştur. Boy büyümesi bakımından Karacasu deneme alanında TATİ arazi hazırlığı daha başarılı olurken, Seydikemer deneme alanında ÇUTİ arazi hazırlığı daha başarılı olmuş, Savaştepe deneme alanında ise farksız bulunmuştur. Beşinci yılın sonunda en iyi fidan boy gelişimi 3,14 m ile Karacasu deneme alanındaki TATİ işlem parsellerine dikilen fidanlardan elde edilmiştir. Endüstriyel ağaçlandırmalar için uygun alanı seçerken, özellikle toprağın bonitet ve eğim durumundan önce taşlılığına da bakılması gerektiği, karstik arazilerde tam alan derin toprak işlemesi ve kızılçam endüstriyel ağaçlandırmalar yerine, doğal gençleştirme yapmanın daha uygun olacağı söylenebilir.
Automated Detection of Collagen Bundles in Second Harmonic Generation Microscopy Images
Authors: KAYASANDIK Cihan Bilge
Published: January 2024

Collagen is one of the most abundant proteins in the body. It is essential for the structure, functionality, and strength of the connective tissue such as skin, bone, tendon, and cornea. It is known that a change in the arrangement or morphology of these fibrillar structures relates to multiple dysfunctions including corneal diseases and various cancer types. Due to their critical roles in wide-range abnormalities, there is an increasing interest in the pattern analysis of collagen arrangements. In recent years, Second Harmonic Generation (SHG) microscopy is proven to be an efficient imaging modality for visualizing unstained collagen fibrils. There are plenty of studies in the literature on the analysis of collagen distribution in SHG images. However, the majority of these methods are limited to detecting simple, statistical and non-local properties such as pixel intensity and orientation variance. There is a need for a method to detect the local structural properties of collagen bundles. This paper is to introduce an automated method to detect collagen bundles in 3-dimensional SHG microscopy images. The origin of the proposed method is based on multiscale directional representation systems. The proposed method detects the collagen bundles by measuring the dominant orientation of local regions and an orientation-based connected component analysis. Through more local analysis and the detection of collagen bundles separately, the proposed method would lead to the extraction of more detailed structural information on collagen bundle distribution.
Different Induction Motor Faults by New Proposed Random Forest Method
Authors: BAKIR Çiğdem
Published: January 2024

Induction motors (IM) are widely used in industry. Failures in asynchronous motors cause disruptions and interruptions in production processes. Due to this situation, economic losses are experienced. Monitoring the induction motor status and monitoring the symptoms before the failure occurs is a matter of great importance in the industry. In this study, 8 different situations that may occur in the motor were monitored through the acceleration and sound data obtained from the induction motor. The feature vector was created with the Short-Term Fourier Transform (STFT) method on the acceleration and sound data obtained from the engine. The feature vectors were classified using the Random Forest (RF) method. The feature vectors created from the acceleration and sound data were also analyzed separately and the classification performance was examined. In addition, a new RF algorithm based on weight values using the Gini algorithm has been proposed. With this algorithm, the traditional RF algorithm has been developed and the success rates have been increased. In classical RF classification based on acceleration and sound data, 89.9% accuracy was achieved. The success rate of the proposed model was 95.7%. This shows that the proposed model successfully detects all types of faults in asynchronous motors. In addition, when we compared in terms of time, it was observed that the proposed model produced faster and more accurate results both in fault detection and in the production maintenance phase.
Bayesian Optimization-based CNN Framework for Automated Detection of Brain Tumors
Authors: KAYA Mahir
Published: January 2024

Brain tumors, capable of yielding fatal outcomes, can now be identified through MRI images. However, their heterogeneous nature introduces challenges and time-consuming aspects to manual detection. This study aims to design the optimal architecture, leveraging Convolutional Neural Networks (CNNs), for the automatic identification of brain tumor types within medical images. CNN architectures frequently face challenges of overfitting during the training phase, mainly attributed to the dual complexities of limited labeled datasets and complex models within the medical domain. The depth and width hyperparameters in these architectures play a crucial role, in determining the extent of learning parameters engaged in the learning process. These parameters, encompassing filter weights, fundamentally shape the performance of the model. In this context, it is quite difficult to manually determine the optimum depth and width hyperparameters due to many combinations. With Bayesian optimization and Gaussian process, we identified models with optimum architecture from hyperparameter combinations. We performed the training process with two different datasets. With the test data of dataset 1, we reached 98.01% accuracy and 98% F1 score values. With the test data of dataset 2, which has more data, 99.62% accuracy and F1 score values were obtained. The models we have derived will prove valuable to clinicians for the purpose of brain tumor detection.
Wedging of the subinterface crack by plastic cladding
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Kutsenko O. G. , Kharytonov O. M. ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Kutsenko A. H. ,   National University of Life and Environmental Sciences of Ukraine, Kyiv, Ukraine
Published: January 2024

The model problem of tension of a two-layer cylinder with an annular subcladding crack located at the base material of the cylinder is considered. It is assume that the base material of the cylinder is linear elastic. The cladding of the cylinder is considered as elastic-plastic with bilinear strengthening. The base material of the cylinder is considered to be linear-elastic, the cladding is considered to be elastic-plastic with bilinear strengthening. The dependence of the stress intensity factor on the internal crack front on the value of the tension stresses and the magnitude of the residual strains in the cladding is investigated. The problem was solved numerically using the finite element method. It was established that the plastic zone in cladding does not develop in the direction of crack extension, but at some angle to it. A preliminary analysis of the stress state in the absence of a crack made it possible to explain this phenomenon, as well as some other regularities obtained in the numerical results. The conclusions presented in the work can be useful in evaluating of the crack resistance of equipment and pipes with anti-corrosion cladding.
Regularities of flat cracks growth in plates
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Kutsenko O. G. , Kharytonova L. V. ,   National Transport University, Kyiv, Ukraine, Krush R. M. ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Published: January 2024

The general regularities of the influence of the geometric parameters of a fatigue crack on the direction of its growth in elastic plates under uniaxial tension were studied. Straight cracks, cracks in the form of a full cosine period, cracks in the form of a circle arc and kinked cracks were considered in a broad range of their geometric parameters variations. The direction of crack growth was determined in accordance with the criteria of maximum tangential (circumferential) stresses. The stress intensity factor of mode I and mode II of fracture were determined numerically using the finite element method. The obtained results made it possible to conclude that in the case of smooth crack faces, the direction of its growth primarily depends on the angle between the tangent at the crack tip and the direction of tension. It was established that the presence of a corner point of the faces near crack tip significantly affects the direction of crack growth in the case of small angles, between the tangent and the direction of tension. For such cases, numerically, it was not possible to achieve a continuous limiting transition in the results when the corner point approaches the tip. This circumstance complicates the issue of choosing the size of the initial crack growth step.
The vector algebra approach to the kinematic analysis of the structural groups of the 2nd class by Artobolevsky
Authors:   Igor Sikorsky Kyiv Polytechnic Institute, Khoroshev K. G. , Duchenko K. O. ,   Technical University of Munich, Germany, Kykot S. V. ,   Igor Sikorsky Kyiv Polytechnic Institute
Published: January 2024

The methodology for analyzing velocities and accelerations of characteristic points, as well as angular velocities and angular accelerations of links, of the structural groups of the 2nd class according to Artobolevsky is developed using exclusively the tools of vector algebra. There are exist five forms of the structural groups of the 2nd class by Artobolevsky, each form has been considered. The position analyses of the structural groups, which are described by the links’ direction vectors and the radius-vectors of points of external kinematic pairs, and in addition, if necessary, the position analysis of external links are assumed to have been carried out by the vector algebra or some other approach. Provided for all forms of the structural groups formulas for calculations are prepared for creating a software product that automatizes the kinematic analysis of planar linkages of the 2nd class according to Artobolevsky. Also, they can be used for the kinetostatic and dynamic analyses of the mentioned linkages. The specified limits of application of the presented approach are pointed out.
Investigation of the stress-strain state of a cylinder with microstructural transformations under pulse loading
Authors:   S.P. Timoshenko Institute of Mechanics of National Academy of Sciences of Ukraine, Kyiv, Yakovenko N. D. , Yakymenko S. M. ,   Central Ukrainian National Technical University, Kropyvnytskyi
Published: January 2024

Axisymmetric dynamic problem of thermomechanical loading of a steel cylinder is considered. Volume strain caused by the microstructural transformations of the martensitic type under cooling solids as well as into consideration and dependence inelastic characteristics of material for multiphase state are taken. The thermomechanical nonlinear behavior of an isotropic material is described by unified flow model generalized for the case of multiphase material state. The problem is solved numerically by the implicit step-by-step time integration method, by the iterative method and by the finite element method. The investigation of the stress-strain state of an inelastic material with regard for the dependence of parameters of the flow model on the phase composition of a material is carried out by using of numerical simulation. We established that microstructural transformations significantly reduce residual inelastic strain and promote the appearance of compressive stresses. The results obtained in the work can be used in calculations of parameters of surface hardening technologies.
Construction of asymptotics of the solution for a system of singularly perturbed equations by the method of essentially singular functions
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Sobchuk V. V. , Zelenska I. O. ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Published: January 2024

Singularly perturbed problems with turning points arise as mathematical models for various physical phenomena. The internal turning point problem is a one-dimensional version of the steady-state convection-diffusion problem with a dominant convective term and a velocity field that changes sign in the reservoir. Boundary turning point problems, on the other hand, arise in geophysics and in the modeling of thermal boundary layers in laminar flow. The paper analyzes the results from the asymptotic analysis of singularly perturbed problems with turning points. For a homogeneous system of singularly perturbed differential equations with a small parameter at the highest derivative and a turning point, the conditions for constructing a uniform asymptotic solution are obtained. We consider the case when the spectrum of the limit operator contains multiple and identically zero elements. The asymptotics are constructed by the method of essentially singular functions, which allows using the Airy model operator in the vicinity of the turning point. The construction of asymptotic solutions contains arbitrary constants, which are determined uniquely during the solution of the iterative equations. At the same time, the conditions for the existence of a solution of a system of differentials with a small parameter for the highest derivative and for the presence of a turning point are obtained, provided that the turning point is located on the interval [0; l]. An example of constructing the asymptotic of a homogeneous system of differential equations is given.
Recognition of heart rhythm disorders in children by integral parameters of electrocardiograms
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Ivanov S. M. , Matviienko S. O. ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Published: January 2024

The article deals with the organization of a database table for the accumulation of integral parameters of electrocardiograms of male and female children in the front-line region of residence (the city of Kharkiv and the Kharkiv region of Ukraine). The calculated main numerical characteristics of integral ECG parameters such as mathematical expectation, variance and standard deviation with heart rhythm disorders are presented. The application of logistic regression to determine the degree of heart rhythm disturbance, which is determined in the interval (0;1), is considered. Representation of logistic regression as multiple linear regression is described. The LSE method is used to estimate the parameters. A correlation matrix of linearly independent integral ECG parameters is given. The obtained results may be of interest to developers of software applications designed for personal health monitoring.
TEACHING ENGLISH AS A FOREIGN LANGUAGE: RETHINKING THE MULTIMODALITY AND COMMUNICATION SKILLS IN THE 21st CENTURY
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Byrkun Liudmyla
Published: January 2024

This text is a review of the OUP Position Paper authored by Donaghy, K. with the assistance of two consultants – Karastathi, S. and Peachey, N. The primary objective of this review is to provide a detailed analysis of the ELT Position Paper, examining its structure, content, and theoretical issues. After a thorough examination of the publication, the reviewer concludes that it is of utmost importance to restructure the primary components of communicative competence in teacher training curriculums worldwide, including those taught at Ukrainian universities. This is because of the emerging views on the multimodality of present-day learning and communication which emphasize the need to reflect topical aspects of new ideas about multimodal communicative competence. Thus, this review highlights the need for a significant shift in the way we approach English language teaching to non-native speakers, particularly in terms of teacher training. It is essential to incorporate modern concepts and theories to ensure that learners of English as a second or foreign language can communicate effectively in the contemporary world