bluuebunny/crossref_metadata_2025 huggingface dataset:
Needs Analysis: Development of Year Five Science Mobile Applications for Rural National Schools in Malaysia
Authors: Abd Samad Mohd Razali , Iksan Zanaton , Khalid Fariza
Published: December 2024

The world's technological advancements are presently accelerating. This growth is centered not only in specialised areas but also in the education sector. According to previous research, Malaysian teachers do not vary their teaching strategies in the classroom. Furthermore, because teachers only utilise one method in learning and facilitation sessions, students' interests and motivation are dwindling. The Ministry of Education Malaysia's (MOE) ambition to make Malaysia a developed country in the field of Science and Technology may be hampered if this situation continues. The goal of this study was to determine the design requirements for a Science android application for national school kids in year five. In this study, the Unified Theory of Acceptance and Use of Technology (UTAUT) was employed as a base model. A survey of 188 fifth-year students from rural national schools was done to see if there was a need for a Science mobile android application in these schools. The data from the descriptive statistical analysis were examined with SPSS software version 23. Mean values, percentages, and standard deviations were used to analyse the data. According to the findings of the study, the majority of students (76.1 percent, n = 188) own at least one mobile device. The findings of this study show that rural national school fifth-year students have access to technology needs for Mobile Learning (M-Learning). The findings indicate that a Science mobile android application for M-Learning use by fifth-year students in Malaysian rural national schools is required.
Technology Integration Among Mathematics Teachers During Home-Based Teaching and Learning
Authors: Ab Hajis Nurul Asnidah , Rosli Roslinda , Mahmud Muhammad Sofwan , Halim Lilia , Abdul Karim Aidah
Published: December 2024

The implementation of Home-Based Teaching and Learning (PdPR) is a new norm in the national education system. This qualitative study with a case study design aims to explore the practice of technology integration among mathematics teachers during the implementation of PdPR. A total of three secondary school mathematics teachers were selected as study participants using the purposive sampling technique. Semi-structured interviews were conducted to collect study data. Interview data were analyzed using the content analysis method with the help of ATLAS.ti 22. The results of the interviews showed that teachers have integrated technology in the teaching and learning of mathematics through various approaches, strategies, and digital applications during PdPR. Mathematics teachers also found that PdPR has given them a valuable new experience in the aspect of teaching despite facing various challenges in implementing it. Through this study, the integration of technology proved to be very helpful to mathematics teachers in implementing teaching and learning at home more effectively. Therefore, mathematics teachers are encouraged to attend professional development courses and workshops related to the use of technology to ensure the effectiveness of PdPR.
Tinjauan Strategi menangani Diskalkulia melalui Sorotan Literatur Sistematik
Authors: Mohmad Afiq Fikrie , Mohamad Sidek Mohamad Solehuddin , Rosli Roslinda , Maat Siti Mistima , Mahmud Muhammad Sofwan
Published: December 2024

Diskalkulia merupakan salah satu masalah pembelajaran dalam Matematik. Murid diskalkulia ini menghadapi isu berkaitan dengan nombor dan simbol. Oleh itu, kajian sorotan sistematik literatur ini bertujuan untuk menganalisis kajian lepas yang mengkaji strategi yang digunakan dalam menangani masalah pembelajaran diskalkulia. Dua pangkalan data iaitu SCOPUS dan Web of Science (WoS) digunakan untuk mencari artikel dari tahun 2019 hingga tahun 2022. Sebanyak 374 artikel yang menggunakan kata kunci strategi dan diskalkulia telah dijumpai namun hanya 15 sahaja artikel dikenal pasti yang memenuhi syarat dan diterima dalam kajian ini. Bagi memastikan kajian ini dijalankan dengan sistematik, kajian ini menggunakan Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). Kajian ini mengandungi dua persoalan kajian iaitu apakah ciri-ciri kajian empirikal serta strategi yang bersesuaian untuk digunakan dalam menangani masalah pembelajaran diskalkulia. Terdapat 12 negara yang telah mengkaji strategi dan intervensi untuk diskalkulia dalam tempoh empat tahun terkini. Terdapat pelbagai strategi yang telah digunakan termasuklah kaedah tradisional dan teknologi. Kesemua kaedah yang digunakan telah memberikan kesan yang signifikan dalam mengatasi masalah pembelajaran diskalkulia. Hasil kajian ini membantu para pengkaji untuk menambah strategi dan intervensi bagi mengatasi masalah pembelajaran diskalkulia.
Weaving Culture and Science: A reflection on teaching science through story-telling
Authors: Ling Loh Su , Mustafa Zainun , Yusoff Nur Ezdiani
Published: December 2024

Implementing culturally responsive education is possible by incorporating story-telling into science teaching and learning. It can be viewed as one way to present new scientific concepts or information that may be complex or difficult to comprehend. This study uses a local Malay folklore story, 'Hang Tuah dan Keris Tamingsari', alongside a hands-on activity during an after-school holiday program for primary students in a local library. A total of 25 participants were involved and their written reflection was collected. The collected data and images were coded and analysed along with the participatory observation. The results indicate that while participants expressed fascination with the story and the handicraft activity, they struggled to recall the science concept. Many mentioned learning about Hang Tuah and its noble values, emphasizing their engagement with the story and the craft rather than the intended science learning. This suggests the need to improve the alignment between the story, hands-on activity, and the science concept conveyed in the story. However, this is not a conclusive study as the findings may be influenced by factors such as the age group, duration of the program, and the reliability of participants' reflections. Several recommendations are provided to enhance the delivery of science content through story-telling in future research.
An Analysis of Students’ Understanding of Algebraic Concepts
Authors: Muhammad Fuad Tiew Nur Nadira Ashyikin , Teoh Sian Hoon , Aperapar Singh Parmjit Singh , El Walida Sikky , Faradiba Surya Sari
Published: December 2024

Teaching algebraic topics needs more exceptional efforts to make connections among the topics. Prior research has emphasised students' accomplishments in specific subject areas, but there is a deficiency in analysing students' skills in a few related subject areas. This study seeks to determine the extent to which students comprehend the relationship between the topics. A paper-and-pencil examination was administered to 102 pupils from two private secondary schools in Malaysia using a case study. Five respondents were selected to be interviewed regarding their understanding of these topics. This study revealed the efforts made by students to improve their understanding of algebra. A comparison was made between their algebraic knowledge as it pertained to quadratic equations, inequalities, and graphs. Their limited understanding of graphical knowledge in comparison to quadratic equations and inequations influences the decision of the necessary steps for the fundamental components of quadratic mathematics. As there are connections between the topics, this study suggests that students can bridge gaps between their current algebraic knowledge and their graphic comprehension of quadratic functions, equations, and inequalities through discourse and interactive activities.
Efficacy of Using Problem-Solving Method on the Teaching of Social Studies in Public Primary Schools in Busiki County Namutumba District
Authors: Waiswa Mark Micheal
Published: December 2024

The study sought to establish the efficacy of using a problem-solving approach in teaching social studies in Busiki County, Namutumba District, responding to three questions; (1) how a problem-solving method is used in the teaching of social studies? (2) What are the implications of using the problem-solving method in the teaching of social studies? (3) What are the hindrances to the use of problem-solving methods in the teaching of social studies? The study was conducted using a quasi-experimental design and targeted public primary schools in Busiki County. The study population mainly comprised teachers who are the direct implementers of the approach. Questionnaires were used to obtain findings from 99 respondents purposively selected. According to the findings, the problem-solving method can be used to teach social studies in five main ways: critical thinking, historical studies, multiple analyses of events, using secondary sources of information, and using logical examples. The implications are: promoting critical thinking; developing skills for learners to face the real world; developing the ability to make evaluations; making learning more engaging; and promoting the sharing of ideas. The hindrances include; No platform for professional development, scepticism, no teaching aids, and No integration into the curriculum. Conclusively, the problem-solving method is an effective approach for teaching social studies in primary schools. It is therefore recommended that educational leaders try to consider the significance of incorporating critical thinking into social studies instruction, despite challenges like a lack of professional knowledge and scepticism
ORGANIZATIONAL AND METHODOLOGICAL CONDITIONS FOR DEVELOPING TEXTBOOK-WORKING SKILLS IN PRIMARY SCHOOL STUDENTS WITHIN THE CONTEXT OF RUSSIAN LANGUAGE LESSONS
Authors:   Altai State Pedagogical University, Nikitina Lyubov A.
Published: December 2024

Based on the analysis of current trends in learning outcomes, the paper considers the need for the development of key universal competencies (skills) of the 21st century when working with a textbook as a means and method. Survey results highlight problematic aspects in the methodical activity of a teacher in the organization of work with a textbook in Russian lessons. The author describes optimal organizational and methodological conditions that contribute to the formation of the ability of younger schoolchildren to work with a textbook as a meta-subject action.
MENTORING AS AN EFFECTIVE FORM OF ASSISTANCE TO YOUNG PROFESSIONALS DURING THEIR ADAPTATION TO THE LABOR MARKET
Authors:   Amur State University of Humanities and Pedagogy, Kalashnikov Gleb A.
Published: December 2024

The article discusses the main approaches to mentoring, describes the key difficulties and difficulties of a young specialist at the beginning of his work at the enterprise, reveals the concept of mentoring, shows how mentoring has changed in modern society. The purpose of the article is to study mentoring in the field of professional development on the basis of institutions of higher education and on the example of the organization of a mentoring system and its impact on the adaptation of young professionals at the Far Eastern Projecting and Surveying Institute of Transport Network Construction.
FEATURES OF PROFESSIONALISM FORMATION IN CADETS AND STUDENTS AT THE STAGE OF TRAINING IN EDUCATIONAL ORGANIZATIONS OF THE MINISTRY OF INTERNAL AFFAIRS OF RUSSIA
Authors:   Barnaul Law Institute of the Ministry of Internal Affairs of Russia, Popova Olga O.
Published: December 2024

Development of professional qualities in cadets and students at the stage of training in educational organizations of the Ministry of Internal Affairs of Russia is a priority task of departmental education. The article presents the legal nature, characteristics of professional qualities in cadets and students at the stage of training in educational organizations of the Ministry of Internal Affairs of Russia, as well as the development and implementation in the educational practice of departmental higher educational institutions of organizational and pedagogical conditions for the formation, development of professional qualities in students.
PEDAGOGICAL INTERNSHIP AS A FACTOR IN MINIMIZING PROFESSIONAL SKILL DEFICITS IN FUTURE TEACHERS
Authors:   Ural State Pedagogical University, Belousova Natalya S. , Postnikova Alena Al. ,   Ural State Pedagogical University, Ezhov Pavel Yu. ,   Ural State Pedagogical University
Published: December 2024

Foreign universities with a high assessment of teacher training pay great attention to the development of meta-subject competencies and practical orientation. Active teaching methods, formative assessment, and individualization are not used enough in Russia. In order to minimize the educational deficits of students in a number of Russian universities, a pedagogical internship is being tested. The authors aim to analyze the new educational form as a condition for minimizing professional skill deficits in future teachers by reflecting on foreign and domestic experience is given, and outlining promising areas of internship.
Experience in the Development of the Sine-Wave Filter for High-Power Variable Voltage Variable Frequency Drive with Medium Voltage Induction Motor
Authors: Pustovetov Mikhail
Published: December 2024

The relevance of the work reflects the increased use in practice of variable frequency electric drive additional options, which include sine-wave filter. The main aim of the study: is to develop guidelines for choosing the parameters of the sine-wave filters and the correct selection of the elements in the current; consider the phenomena occurring when the capacity is connected to terminals of the load with an induction motor, such as: reactive power compensation and overcompensation, self-excitation. The methods used in the study: test on a real process plant; and computer simulation of an electromechanical system with a semiconductor converter based on a combination of circuit and operational principles for preparing the model. The results: some of the results of experience in the design and testing of the sine-wave filter for high-power variable voltage variable frequency drive with medium voltage induction motor with scalar control are described. The comparative results of the computer simulation of processes at different sets of the sine-wave filter and converter parameters are presented. Some recommendations for sine-wave filter design are suggested.
First-hitting Place Optimization Problems for Two-dimensional Degenerate Diffusion Processes
Authors: Lefebvre Mario
Published: December 2024

Optimal control problems for degenerate two-dimensional diffusion processes are considered. The processes could serve as models for wear processes. The objective is to make the controlled process leave the continuation region through a given part of the boundary. Explicit and exact solutions are obtained for important processes such as the geometric Brownian motion and the Ornstein-Uhlenbeck process.
ON THE METHOD OF CONTROLLING OBJECTS WHOSE MOTION IS DESCRIBED BY A SYSTEM OF LINEAR DIFFERENTIAL-DIFFERENCE EQUATIONS
Authors:   PhD, Associate Professor, Kokand State Pedagogical Institute, Uzbekistan, Aroev Dilshod Davronovich
Published: December 2024

This article explores the methods of controlling objects whose motion is described by a system of linear differential-difference equations. It provides an analysis that serves as a basis for developing an approach to eliminate existing shortcomings.
THE ROLE OF SPEECH CHARACTERISTICS IN THE COMMUNICATIVE COMPETENCE OF A LEADER
Authors:   Acting Professor at the Department of Psychology at Tashkent State University named after Nizami, Uzbekistan, S.Х. Djalilova
Published: December 2024

The article examines the problem of communicative competence of the head of an educational institution. In particular, the results of the study of psychosemantic aspects of speech obtained using the Osgood semantic differential method are analyzed.
ISSUES OF THE FUNCTIONING OF THE INSTITUTE AND WAYS FOR ITS IMPROVEMENT
Authors:   Applicant at Karakalpak State University, Uzbekistan, Joldasbaevich Igilikov Jaksylyk
Published: December 2024

The study examines the functioning of the institute of filing motions and complaints in criminal proceedings, focusing on issues related to its regulatory framework within the Code of Criminal Procedure of the Republic of Uzbekistan. It highlights the need to establish this institute as an independent legal mechanism, detailing forms of submission, eligible persons, and procedural requirements. The research emphasizes practical and theoretical advancements, including the clarification of definitions, harmonization with international standards, strengthening the rights of the parties, and developing timeframes for efficient resolution. Issues such as insufficient regulation, arbitrary denial of petitions, and the ineffectiveness of complaint mechanisms at pre-trial stages are addressed. Comparative analysis with foreign legal systems reveals best practices for reforming procedures. Recommendations include ensuring reasoned decisions, timely responses, and disciplinary accountability for unjustified actions. The article proposes extending deadlines for post-investigation actions to enhance the rights of defense counsel and ensure thorough investigations, advocating for a balanced and effective approach to protect the rights of participants in criminal proceedings.
PEDAGOGICAL AND PSYCHOLOGICAL CHARACTERISTICS OF MENTAL PREPARATION OF STUDENTS TO SUCCESS IN COOPERATION THROUGH TEAM SPORTS GAMES
Authors:   Fergana State University Teacher of the Department of Physical Culture and Sports Games Teaching Methodology, Uzbekistan, Makhamadovich Khakimov Kobul
Published: December 2024

This article describes the meaning and significance of the concepts of "team" and "cooperation". Also, the pedagogical and psychological features of mentally preparing students for success in cooperation through team sports games are substantiated.
METHOD OF LEARNING A FOREIGN LANGUAGE BY DMITRIY PETROV
Authors:   Teacher of German Language, the faculty of foreign languages at Jizzakh State Pedagogical University, Uzbekistan, Axatovna Safina Farida
Published: December 2024

This article explores the method developed by renowned Russian polyglot Dmitriy Petrov, who created a language-learning program designed to teach any foreign language in just 16 lessons. I will examine the advantages and disadvantages of his methodology and highlight key elements that can be adopted for effective language learning. Dmitriy Petrov's Method of Learning Languages: A Practical Approach to Rapid Fluency.
Preliminary chemical evaluation of nutritional perspective of Pito, an indigenous alcoholic beverage brewed in the Upper East region of Ghana
Authors: Addison Ndolbe N. , Agbala Moses A. , Abagale Samson A. , Sackey Isaac , Ibrahim Shakira
Published: December 2024

This study evaluated some macro and trace elements in a Ghanaian indigenous beverage, pito. Pito samples from the Upper East region, Ghana, were analysed using AAS, Spectrophotometry, and titration; for Ca, Mg, Na, K, Cu, Co, Cr, Fe, Al, Pb, As, Ni and Zn. 35.0 to 59.0 mg/L Ca; 16.97 to 30.74 mg/L Mg; 9.05 to 13.18 mg/L K; 18.03 to 26.15 mg/L Na; 0.11 to 0.18 mg/L Fe; 0.00 to 0.01mg/L Al, and 0.00 to 0.01 mg/L Cr were present. Also, 1.83 to 2.95 mg/L Zn; 0.05 to 0.07 mg/L Ni; 0.00 to 0.02 mg/L Cu, and 0.10 to 0.11 mg/L Co were found. Al and Cr were overall least (0.01 mg/L), while Pb and As could not be detected. Cr was only in one sample source, while generally Ni was above the WHO acceptable limit. Further analyses are required to enable comparison and recommendation of pito nutrient-supplement policy.
Role of Language in Promoting Social Cohesion and Peace: Insights and Examples
Authors: Balume Barthelemy Muzaliwa
Published: December 2024

This article examines the role of language in fostering social cohesion and peace. The article emphasises the role of language as a tool for peacebuilding, drawing on insights from 15 peer-reviewed theoretical and empirical articles on language, peace and social cohesion. The document analysis conducted on the 15 articles in question reveals two major directions of language power in peace-building and conflict management. On the one hand, it has been demonstrated that language has the capacity to intensify conflict and erode social cohesion, resulting in discord and confrontation even in contexts that are otherwise peaceful. Conversely, it has been demonstrated that language is conducive to peace and social cohesion. The capacity for social cohesion within a society hinges on the existence of a shared set of meanings that enable members to comprehend the world. This is made possible by language. The impact of language on social cohesion and peace depends on how it is used. By developing speech that is tactful, respectful, inclusive and empathetic, the speaker demonstrates sensitivity to the interlocutor's feelings and emotions, which can help to ease tensions and foster an environment of mutual respect and cooperation. Additionally, through active listening, positive decoding, honest interaction and politeness, the worth and dignity of the interlocutor is recognised, which can contribute to a strong sense of unity and belonging.
INOVAÇÕES NO MANEJO DE PASTAGENS E SUSTENTABILIDADE DA PECUÁRIA DE CORTE EM MATO GROSSO
Authors: Pedreira Bruno C. , Gomes Fagner J. , Pereira Dalton H.
Published: December 2024

A pecuária de corte no Mato Grosso é um setor vital para a economia, destacando-se pela integração Lavoura-Pecuária-Floresta (ILPF) e pelo uso de forrageiras, como Brachiaria spp. e Panicum spp., que são as principais fontes alimentares para a produtividade de bovinos a pasto. As pesquisas da Embrapa Agrosilvipastoril em parceria com o Programa de Pós-Graduação em Zootecnia da UFMT têm se concentrado para otimizar a produção e a qualidade da forragem em sistemas de produção animal em pastagens. O uso de modelagem matemática tem permitido estimar o crescimento da forragem, contribuindo para ajustes de manejo. A flexibilidade no manejo do pastejo dos capins Quênia e Tamani [Megathyrsus maximus (Jacq.) B. K. Simon & S. W. L. Jacobs] tem melhorado o potencial de perenidade das pastagens, enquanto estudos com os capins híbridos Ipyporã (Brachiaria híbrida ‘BRS RB331 Ipyporã’) e Mulato II (Brachiaria brizantha × B. decumbens × B. ruziziensis) têm demonstrado que Ipyporã, apesar de menor acúmulo inicial, é mais resistente a cigarrinhas de pastagem, oferecendo uma alternativa viável para regiões tropicais. A inoculação com Azospirillum brasilense tem se mostrado uma estratégia eficaz para fixação biológica de nitrogênio, reduzindo a dependência de fertilizantes minerais. Além disso, o manejo de múltiplas espécies forrageiras em consórcios durante a entressafra garantiu forragem com melhor valor nutritivo em períodos críticos (deficiência hídrica) e favoreceu a produção de palhada para o plantio direto. As inovações geradas por estas pesquisas não só aumentaram a produtividade dos sistemas de produção animal e agrícola, como também contribuíram para a sustentabilidade e preservação dos recursos naturais da região amazônica.
Eficácia do Banho Pré-Cirúrgico com Clorohexidina: Revisão Integrativa da Literatura
Authors: Ferrinho Jordão Rodrigo , Isabel Gonçalves Sara , Rodrigues Gonçalves Marco António
Published: December 2024

Enquadramento: a Infeção do Local Cirúrgico surge no local cirúrgico ou na periferia, duranteos primeiros 30 dias após a cirurgia. A prevenção desta infeção exige uma preparação pré-operatória adequada.Objetivo: avaliar a eficácia do banho pré-cirúrgico com clorohexidina na preparação da pele,comparativamente com o banho pré-cirúrgico com placebo na prevenção da Infeção do LocalCirúrgico.Metodologia: realizou-se uma revisão integrativa da literatura partindo da questão “Qual aeficácia do banho pré-cirúrgico com Clorohexidina versus banho pré-cirúrgico com placebo napreparação pré-cirúrgica da pele para a prevenção da infeção do local cirúrgico?”. Definiram-se critérios de inclusão e exclusão, descritores, operadores boleanos e a pesquisa foi realizadanas bases de dados MEDLINE e CINAHL. Foram incluídos na revisão nove artigos.Resultados: o banho pré-cirúrgico com clorohexidina na preparação pré-cirúrgica da pele por sisó, não é significativamente mais eficaz quando comparado com o banho pré-cirúrgico complacebo. A sua eficácia pode ser influenciada por múltiplos fatores que devem ser tidos emconta no desenvolvimento da Infeção do Local Cirúrgico.Conclusão: o banho pré-cirúrgico com clorohexidina não deve ser uma intervenção isolada naprevenção da infeção do local cirúrgico, mas sim conjugada com outras intervenções, tal comorecomendado nas guidelines atuais.
The Phenomenon of Water Fluid Flow Distribution in Hydropower Pico-Hydro Viewed from the Number of Turbine Screw Winding
Authors: Eswanto Eswanto , Siman Siman , Pasaribu Muhammad Nuh Hudawi , Suherman Suherman , Ilmi Ilmi , Hamidi Mohd Adnin
Published: December 2024

Water is one of the energy sources that has the potential to contribute to replacing energy from fossil materials. This research focuses on picohydro scale hydropower, namely water-based electricity generation as a turbine driving source. Picohydro-scale hydropower is an important part to implement, because the system is not difficult to implement. The aim of the research is to determine the performance of the pico-hydro renewable power plant in terms of the number of turns of the turbine blade screw. The research method was carried out by direct experimentation from a device that had been made using water fluid which was circulated in a closed cycle in pico-hydro hydropower. In the initial stage of the research, drawing designs were carried out, after validation, the tool manufacturing process was carried out. After completion of the manufacturing process, it continues with the testing and measurement process to obtain the desired data. Measurements start from the water flow produced, turbine shaft rotation, transmission rotation, load and power produced. The test model consists of variations in the number of screw turns, namely 9 turns, 11 turns and 13 turns. The results of this research are from data processing and are contained in the discussion obtained under certain operational conditions and discharges ranging from 2 m3/h to 30 m3/h in driving a screw turbine. However, the results obtained are still different, which can be seen in the trend lines in the graphic illustration. The performance in this research can be described in the highest power results reaching 434 Watts with a rotation of 298 rpm at a flow rate of 30 m3/h on a test model with 11 screw winding. This condition is the best result compared to other test models, which is possible because due to several factors, such as being too heavy for an increasing number of screws, uneven distribution of the water fluid flow that pushes the turbine blades.
Numerical Investigation of Triangular Y-Shaped Cut Twisted Stripe Insertion on Improving the Performance of Heat Exchangers
Authors: Adil Mohammed Ansam , Shakir Ammar Khamees , Channapattana Shylesha Vasantrao
Published: December 2024

Passive thermal performance has been the subject of significant study interest lately, with metal inserts being recognized as an effective method for boosting it. Nevertheless, there has been a limited investigation into Y-shaped inserts with diverse geometric configurations. A numerical study was approved to explore the optimization of heat transfer. in a high-temperature circular tube using Y-shaped inserts. The analysis considered two scenarios: one without any twisting, and another with Y-shaped inserts that had an axial twist and a twisted ratio of 2 along the edge. The Ansys 2022-R2 module was utilized to do calculations using the limited volume approach, employing the k-ε turbulence model. The study involved exposing a pipe segment with dimensions of 1.5 m in length and 68 mm in diameter to a steady heat flux of 1000 W/ m 2 applied to the pipe wall. During the analysis, air is used as the fluid used for work, with the Reynolds values (Re) vary from 3000 to 21000., inclusive, in increments of 3000. The findings indicate that the optimal the values of the Nusselt number (Nu), reaching up to 128.14, can be attained at a Reynolds number (Re) of 21000 for Y-shaped designs with a twisted configuration. However, in comparison to a smooth tube, the values of the Nusselt number (Nu) increased by a factor of 5.68, with a coefficient of friction (f) of 0.029 and a Thermal Performance Evaluation (TPE) of 2.147, suggesting higher thermal performance.
The Study on the Performance of Different Optimization Algorithms in Maximum Power Point Tracking for a Standalone Photovoltaic System
Authors: Somesunthrim Kamini , Charin Chanuri , Ismail Baharuddin
Published: December 2024

Performance evaluation of maximum power point tracking with a boost converter was presented in this paper. Several MPPT methods have recently been considered as alternatives to conventional MPPT methods, which have high steady-state oscillation and low efficiency. In order to solve the aforementioned issues, a soft computing method is suggested. Under MATLAB/Simulink, the efficiency of P&O, PSO and SSA was evaluated. The MPPT algorithms were tested under three main conditions which are under high irradiance (1000 W/m2), medium irradiance (600 W/m2,) and low irradiance (200 W/m2). Based on the simulation results, Salp Swarm Algorithm (SSA) method shows the best MPPT method with 89.95%, 99.90% and 98.38% tracking efficiency under high, medium and low irradiances respectively. SSA was the best method in terms of high efficiency, no steady-state oscillations and fast convergence.
Power Conversion from Solar Panels using a 3000-watt Inverter
Authors: Harahap Partaonan , Rimbawati Rimbawati , Evalina Noorly , Pasaribu Faisal Irsan , Siregar Munawar Alfansury , Lubis Sudirman , Siregar Chandra Amirsyah Putra , Karim Malik abdul , Tanjung Liza Evianti , Hasibuan Edi Sarman , Siregar Irpansyah
Published: December 2024

The advancement of inverter technology has seen rapid growth and widespread adoption across various industrial and commercial sectors. The output wave of the inverter has seen significant development since the introduction of the multilevel inverter. By utilizing multilevel inverters, the strain on switch components can be alleviated due to the low frequency of the power wave. This results in generating a voltage that closely resembles the desired output of the AC voltage. The study demonstrated the efficient utilization of resistive loads by the transformer, with the average sinusoid voltage source measuring 103.6%. When conducting inverter testing with a 60 Volt resource, the current input, output, voltage, and input and output efficiency measurements are obtained using a 10 Amper resource. After analyzing the data collected from the tests, it was found that the system's output voltage fell short of the anticipated 220 Volt. When a load of 60 W/220V is added, the system's output voltage is affected, resulting in an output of 740.5 Volts. When the light load is decreased to 60W/220V, the output voltage rises to 786.9 Volt with an average inverter efficiency of 77%. The input power efficiency ranges from 25.5% to 80.0% when calculated based on the inverter power capacity limit.
Recomendaciones para el mes de Diciembre
Authors:   Centro Nacional de Investigaciones de Café
Published: December 2024

El resto del 2019 e inicios de 2020 predominará una condición ENOS*-Neutral. En diciembre se presentarán condiciones ajustadas al comportamiento climatológico del mes. Para el mes de diciembre de 2019, se estima una mayor probabilidad de que la precipitación en Colombia se presente por debajo de lo normal, particularmente en las regiones Norte y Oriente. Para el resto del país, se esperan precipitaciones cercanas a los promedios climatológicos.
Recomendaciones para el mes de Abril
Authors:   Centro Nacional de Investigaciones de Café
Published: December 2024

Para abril de 2020 se esperan lluvias muy cercanas a los valores climatológicos en gran parte de la zona cafetera, excepto en la región Norte, donde se estima una reducción entre el 10% y el 20%. Se prevé que la fase Neutra del ENOS se mantenga durante el primer semestre de 2020.
Recomendaciones para el mes de Junio
Authors:   Centro Nacional de Investigaciones de Café
Published: December 2024

Para junio se prevé reducción de las lluvias entre el 10% y 30% con respecto a los registros climatológicos en gran parte de la región cafetera Norte, y entre el 10% y 20% en amplios sectores de las regiones cafeteras Centro Norte y Centro Sur. La probabilidad de que se presenten esas reducciones es superior al 70%. Se espera que la fase Neutra del ENOS se mantenga durante el primer semestre de 2020.
Recomendaciones para el mes de Julio
Authors:   Centro Nacional de Investigaciones de Café
Published: December 2024

Para julio, se prevén precipitaciones entre normales y 30% superiores, con respecto a los registros climatológicos, en gran parte de la región cafetera. Se espera que la fase Neutra del ENOS se mantenga hasta el tercer trimestre de 2020.
Recomendaciones para el mes de Enero
Authors:   Centro Nacional de Investigaciones de Café
Published: December 2024

Para enero de 2021 se esperan lluvias por encima de lo normal, entre el 20% y el 40% en sectores puntuales de los departamentos de Cesar, Bolívar y Antioquia, en el resto de la zona cafetera se prevén lluvias cercanas a la climatología y por debajo, entre el 10% y el 40%. Continúan presentes las condiciones de un evento La Niña y se prevé que se mantengan hasta mayo de 2021.
Recomendaciones para el mes de Mayo
Authors:   Centro Nacional de Investigaciones de Café
Published: December 2024

Para el mes de mayo de 2021 se estiman precipitaciones entre 10% y 40% por encima de las condiciones históricas, en algunas zonas del Oriente de Antioquia y Centro de Santander. De igual manera, en sectores de Magdalena, La Guajira, Norte de Santander, Santander, Arauca, Casanare, Valle del Cauca, Cauca, Tolima y Huila, se prevén déficits entre el 10% y el 40%. Actualmente se tienen condiciones climáticas que reflejan el debilitamiento de La Niña, con una probable transición a condiciones Neutras entre mayo y junio de 2021.
Recomendaciones para el mes de Agosto
Authors:   Centro Nacional de Investigaciones de Café
Published: December 2024

Para agosto de 2021 se estiman aumentos de lluvia entre el 10% y el 40% con respecto a los promedios históricos, en gran parte de la Región Cafetera Colombiana.
New record and dietary ecology of a poorly-known treefrog, Zhangixalus pachyproctus Yu, Hui, Hou, Wu, Rao & Yang, 2019 (Anura, Rhacophoridae) in Vietnam
Authors: Pham Anh , Trinh Gam , Dang Linh , Duong Duyen , Nguyen Truong , Le Minh Duc , Ziegler Thomas
Published: December 2024

The White-lipped Treefrog Zhangixalus pachyproctus Yu, Hui, Hou, Wu, Rao & Yang, 2019 was previously confused with Zhangixalus smaragdinus (Blyth, 1852). Records of Zhangixalus smaragdinus from Yunnan (China), Vietnam and Thailand were recognised as a misidentification and this taxon was subsequently described as a new species, based on morphological and molecular evidence. This species is currently known from southern China, Thailand, Laos and Vietnam. However, knowledge about its natural history and feeding ecology is virtually lacking.

We herein report a newly-discovered population of Zhangixalus pachyproctus from Lang Son Province, northern Vietnam. In addition, we provide novel data about the diet of Z. pachyproctus, based on stomach content analyses of 38 individuals (37 males and one female). A total of 26 prey categories with 681 items were found in the stomachs of Z. pachyproctus. The dominant prey items of the species were Orthoptera (Acrididae, Tettigoniidae), Coleoptera (Languriida, Leiodidae, larvae, other Coleoptera), Mantodea (Mantidae) and Blattodea (Blaberidae, Blattidae, other Blattodea). Coleoptera (Coccinellidae, Cupedidae, Elateridae, Languriidae Leiodidae, Tenebrionidae, larvae and other Coleoptera) was the category with the highest frequency of prey items, found in 24 stomachs. The most important (IRI) groups amongst the prey of Z. pachyproctus were Coleoptera (24.52%) and followed by Orthoptera (24.43%), Blattodea (9.12%), Mantidae (8.14%) and Hemiptera (4.05%).
A new computational method for sparse optimal control of cyber-physical systems with varying delay
Authors: Lin Sida , Yang Dongyao , Yuan Jinlong , Wu Changzhi , Zhou Tao , Li An , Gu Chuanye , Xie Jun , Gao Kuikui
Published: December 2024

In practice, network operators tend to choose sparse communication topologies to cut costs, and the concurrent use of a communication network by multiple users commonly results in feedback delays. Our goal was to obtain the optimal sparse feedback control matrix $ K $. For this, we proposed a sparse optimal control (SOC) problem governed by the cyber-physical system with varying delay, to minimize $ ||K||_0 $ subject to a maximum allowable compromise in system cost. A penalty method was utilized to transform the SOC problem into a form that was constrained solely by box constraints. A smoothing technique was used to approximate the nonsmooth element in the resulting problem, and an analysis of the errors introduced by this technique was subsequently conducted. The gradients of the objective function concerning the feedback control matrix were obtained by solving the state system and a variational system simultaneously forward in time. An optimization algorithm was devised to tackle the resulting problem, building on the piecewise quadratic approximation. Finally, we have presented of simulations.
An exploratory study on STEM education through math trails with digital technology to promote mathematical literacy
Authors: Cahyono Adi Nur , Arifudin Riza , Aditya Rozak Ilham , Maulana Bagus Surya , Lavicza Zsolt
Published: December 2024

This study aims to investigate how the use of math trail activities and digital technology in STEM education can help to improve mathematical literacy. Exploratory design research involving teachers and eighth-grade students in a junior high school was conducted. A STEM Trails application was developed, several trails were designed, and students performed the activities. Participant observation, interviews, questionnaires, exams, and worksheets were used to collect data. Organization, annotation, data description, and statistical tests were carried out for data analysis. Based on the results of the analysis, an educational program was designed to provide students with valuable STEM experiences. This program was supported by GPS-based applications that serve as tools for students to develop mathematical literacy by solving STEM-related problems in the surrounding environment. As a result, the program promoted students' mathematical literacy. This study discovered a link between the program's instrumental approaches and the mathematical literacy developed throughout the instrumentation process. The findings of this study demonstrate that the integration of digital technology in STEM-based math trails can effectively enhance learners' mathematical literacy through contextualized and interactive learning experiences. It is recommended that future research should extend the implementation of STEM Trails to a wider range of learning environments and investigate its impact on students' skills and abilities in greater depth.
Comparative Evaluation of PD Detection Using Deep Learning on IMFCCs Extracted from VMD
Authors: Boualoulou Nouhaila , Nsiri Benayad , Belhoussine Drissi Taoufiq
Published: December 2024

This paper presents a new method for extracting vocal features for the diagnosis of Parkinson’s disease (PD) via voice analysis applying variational mode decomposition (VMD). The classical method of extracting mel-frequency cepstral coefficients (MFCC) is compared to a new approach that generates coefficients named intrinsic mel-frequency cepstral coefficients (IMFCC). For this study, two audio databases were used: the SAKAR database containing 38 recordings and a PC-GITA database comprising 50 recordings. The signal preprocessing steps include frame segmentation, pre-emphasis, and filtering. The voice signal is then decomposed into intrinsic modes employing VMD. From these modes, the log-energy of specific components is calculated to extract the IMFCC. In this study, two types of classifiers were used: convolutional neural networks (CNN) and long short-term memory (LSTM). The results show that IMFCC provides a new perspective for representing vocal signals, capturing distinct features compared to classical MFCC. Notably, the IMFCC2 attained the highest accuracy of 100% adopting the CNN classifier. This approach could improve the performance of systems for identifying PD via voice analysis, offering a robust and complementary alternative to existing feature extraction methods.
Viragens humanitaristas para o desenvolvimento: o caso dos refugiados angolanos no Congo-Léopoldville, 1961-1975
Authors: Guardião Ana
Published: December 2024

O processo conturbado de expansão do sistema internacional de assistência e protecção dos refugiados para África foi pautado por um crescente investimento na integração dos refugiados através de modelos vários de desenvolvimento, sobretudo a partir da década de 1960. Neste artigo, analisam-se essas viragens a partir do caso dos refugiados angolanos no Congo-Léopoldville. Exploram-se as formas como o Alto-Comissariado das Nações Unidas para os Refugiados (ACNUR) se adaptou aos múltiplos desafios associados à expansão do seu escopo de acção. Desde a construção de novas parcerias à acomodação de resistências por parte dos refugiados, estes processos de adaptação demonstram a transversalidade do ímpeto desenvolvimentista a modelos coloniais tardios e internacionais, mas também os impactos da internacionalização dos direitos humanos e da condenação do colonialismo. Este artigo faz parte do dossier temático sobre Organizações Internacionais na Era da Descolonização, organizado por José Pedro Monteiro.
Un acercamiento a la pedagogía vitalista de Nietzsche en la enseñanza de la historia
Authors: Cazana Canchis Serapio Estanislao , Moran Ramos Luis Daniel , Carcelén Reluz Carlos Guillermo
Published: December 2024

La educación y cómo educamos, siempre son temas actuales. De diversas maneras se ha enfatizado que el conocer y memorizar hechos y datos no son causas suficientes para una formación integral de la persona. Friedrich Nietzsche (1844-1900) ya había combatido contra una concepción educativa basada en la erudición coleccionista, objetiva, desprendida de las emociones, y frente a la cual propuso una especie de pedagogía vitalista: los hechos del pasado, del presente, los datos, las descripciones, deben recogerse y tratarse selectivamente teniendo como meta la construcción, la vivificación del individuo, la búsqueda de la unidad y el sentido de aquello que estudiamos. El presente trabajo se orienta a identificar y explicar las concepciones de la educación y de la cultura a las que se enfrentó Nietzsche y cómo se puede caracterizar la pedagógica que él propone para estudiar el pasado.
Exploring Generative AI as Personally Effective Decision-Making Tools
Authors: Hai-Jew Shalin
Published: December 2024

So much of automated decision-making is common in everyday modern life, but it is often hidden in applications, in processes (searches, academic assessments, loan processes, job applications, and others), in self-driving electronic vehicles, and others. Generative AIs have come to the fore and have been used to enhance human decision-making. This work explores whether generative AI tools may be of use for automated decision-making based on first-hand experimentation across a range of queries. The idea is that there is human oversight over decision-making in everyday usage of generative AI, but what would happen if the decision-making were automated and followed-through on based on a fully automated process? How well would that work in this thought experiment? Would the individual be amenable? Why or why not? In terms of surprises and outlier results, are the responses far out or more centralized? Are the decisions practical? Are the decision-making insights valuable or not?
Impact of the COVID-19 Pandemic on Healthcare Fraud
Authors: Kumar Abhishek , Prasad Upendra , Tiwari Rajesh kumar , Kumar Biresh , Alam Md Shoaib
Published: December 2024

The COVID-19 pandemic has led to a surge in healthcare fraud, including false billing, identity theft, counterfeiting, and falsified equipment. The pandemic's challenges, including overwhelmed infrastructure, supply shortages, and shift to telehealth services, have exacerbated vulnerabilities. Losses from healthcare fraud are estimated to be billions of dollars. Advances in technologies like AI, big data analytics, and blockchain can help counter these threats. Collaboration between healthcare entities, payers, and law enforcement is crucial to combat healthcare fraud.
AI-Driven Network Optimization Improving Connectivity and User Experience Through Intelligent Design for Blue-Green Infrastructure Projects
Authors: Sudhakar Vinoth Manamala
Published: December 2024

As urban environments evolve, the need for efficient and resilient infrastructure becomes paramount. This paper explores the role of AI-driven network optimization in enhancing connectivity and user experience within blue-green infrastructure projects. By leveraging intelligent design principles, the study investigates how AI algorithms can optimize water management, urban mobility, and environmental sustainability in urban planning. The integration of AI technologies facilitates real-time monitoring, predictive analytics, and adaptive resource allocation, resulting in improved operational efficiency and reduced maintenance costs. This research highlights case studies demonstrating successful applications of AI in optimizing infrastructure performance and user satisfaction, ultimately contributing to smarter and more sustainable cities.
Role of Films in Waste Management Advocacy
Authors: Jonjua Mehak
Published: December 2024

Films have the power to shape perceptions and influence behaviours, making them a vital tool in educating and inspiring youth towards effective waste management practices. Review of Literature identifies a significant gap in understanding the effectiveness of cinematic narratives in promoting environmental responsibility among young people. This study aims to study how Indian films that address waste management themes, use visual storytelling to raise awareness and motivate young audiences to adopt sustainable habits. Through content analysis of films and with surveys, the study reveals that films significantly impact youth perceptions and actions related to waste management. The study projects the power of media as an educational tool, recommending the integration of film-based initiatives in environmental education programs to enhance their outreach and effectiveness in shaping the attitudes and behaviour of the younger generation towards waste management.
AI-Powered Leadership
Authors: Mudunuri Lakshmi Narasimha Raju , Hullurappa Muniraju , Vemula Vamshidhar Reddy , Selvakumar P.
Published: December 2024

AI also revolutionizes leadership through its impact on innovation and strategic planning. AI technologies can simulate various scenarios and model potential outcomes, helping leaders to explore different strategies and assess their potential impacts. This capability supports more agile and adaptable leadership, as organizations can rapidly respond to changing market conditions and emerging trends. Biases in AI algorithms can lead to unfair outcomes and reinforce existing inequalities, impacting areas such as recruitment and performance assessments. Leaders must prioritize the ethical development and deployment of AI technologies, establishing guidelines and oversight mechanisms to mitigate potential biases and ensure equitable treatment of all employees.Effective leadership involves empathy, emotional intelligence, and the ability to navigate complex interpersonal dynamics—qualities that AI systems cannot replicate. Leaders must therefore find ways to integrate AI tools while preserving and enhancing the human elements of leadership that drive organizational success.