bluuebunny/crossref_metadata_2025 huggingface dataset:
Innovative STEAM Learning: Creating Engaging Colloid Material Videos for High School Students Using CapCut
Authors: Pinandhita Boy , Fuldiaratman Fuldiaratman , Sanova Aulia
Published: January 2025

Purpose of the study: The purpose of this study was to develop STEAM-based learning videos using the CapCut application on Colloid material at the high school level.
Methodology: This study is a development research using the Lee & Owens development model. The research instruments used were interview guidelines and questionnaires. The development products were validated by media experts and material experts, practitioner assessments were carried out by teachers and then tested in small groups. The data analysis techniques used were qualitative data analysis (comments and suggestions) and quantitative data analysis (average score of answers and percentage of questionnaires).
Main Findings: The results of this study were obtained from material experts and media experts with an average score of 4.58 and 4.75 in the Very Eligible category. Furthermore, a practitioner’s assessment by chemistry teachers was obtained with an average score of 4.8 (very feasible), and received a very good response from students with a percentage of 93.5%.
Novelty/Originality of this study: This study introduces a novel approach by integrating STEAM principles into the development of learning videos on colloid materials, leveraging the CapCut application to enhance creativity and interactivity in high school education. Unlike traditional teaching methods, this research combines technology-driven video editing with STEAM-based learning to foster critical thinking, collaboration, and practical application of scientific concepts in an engaging multimedia format.
Bibliometric Analysis From 2014-2024: Integration of Ethnoscience in Science Learning
Authors: Rini Endah Febri Setiya , Rahardjo Sentot Budi , Bramastia Bramastia
Published: January 2025

Purpose of the study: Ethnoscience has become a fairly well-established field among academics, although the topic is still developing. This study aims to analyze research trends related to ethnoscience published in the period 2014 to 2024.
Methodology: This study uses bibliometric analysis and systematic literature review. Data collection was carried out by searching for the keyword "Ethnoscience" in October 2024. The data was sourced from the Scopus database and obtained 271 documents. 166 articles were obtained after filtering. Furthermore, analyzed using VOSviewer.
Main Findings: The results showed that ethnoscience has increased significantly as a research topic from 2014 to 2021; ethnoscience in science learning is more widely studied in Indonesia. The author who researched the most ethnoscience is Sudarmin, with a total of 16 documents. This study also highlights the latest research approaching 2022–2024 and its impact on student skills.
Novelty/Originality of this study: These findings also highlight the importance of ethnoscience in local and traditional studies and focus on the development of science and education.
The Influence of Students’ Views, Attitudes, and Curiosity Characters on the Physical Education Learning Outcomes of Middle School Students
Authors: Nugraha Ugi , Budiarti Retni Sulistiyoning , Yuliawan Ely
Published: January 2025

Purpose of the study: This study aims to see how the influence of perception, attitude, and curiosity character instruments on learning outcomes used in junior high school students in Tebo in the subject of Physical Education.
Methodology: Quantitative analytical descriptive methods were used in this research. The research sample consisted of junior high school students in Tebo who were involved in Physical Education learning.
Main Findings: Data collection was carried out through students' perceptions, attitudes. and curiosity characters towards student learning outcomes in this subject at Junior high school 2 Tebo with 40% in the sufficient category. In addition, students' perceptions, attitudes, and curiosity characters towards student learning outcomes in this subject at Junior high school 16 Tebo tend to be positive with 36% in the sufficient category which can have a positive impact on student activity in learning activities and physical activities.
Novelty/Originality of this study: The novelty of this study lies in the exploration of the relationship between students' perspectives, attitudes, and curiosity characters towards Physical Education learning with their learning outcomes at the junior high school level.
Teachers' and Students' Feedback on Sociocultural Interactive Digital Modules for Science Literacy and Problem-Solving: A Transformative Learning Approach
Authors: Simbolon Merta , Pongkendek Jesi Jecsen , Henukh Anderias , Rochintaniawati Diana
Published: January 2025

Purpose of the study: This article examines the practicality of sociocultural-based interactive digital modules in improving students' science literacy and problem-solving skills by integrating a transformative learning approach.
Methodology: This descriptive research analyzes students' and teachers' responses to the developed interactive digital module. The study was conducted in junior high schools in Merauke Regency and Boven Digoel Regency, South Papua Province, totaling six schools. Data were collected through responses from 6 science teachers and 60 students involved in learning science with the module.
Main Findings: The results showed that this module is efficient for use in science learning, according to the responses from teachers and students. Feedback from teachers and students indicated that this module is efficient to use in science learning, as seen from the average total percentage given by teachers of 95% in the efficient category and provided by students of 95.53% in the efficient category. Through this article, the developed interactive digital module is feasible to use in science learning to improve science literacy and problem solving skills of junior high school students..
Novelty/Originality of this study: The module is designed with an approach that combines Papuan local wisdom values and transformative learning principles. This approach is rarely implemented simultaneously in the context of science learning to improve students' understanding of science. In addition, the interactive digital module not only focuses on understanding science materials but also connects them with local wisdom to increase the relevance of learning to students' daily lives.
Development of Statistical Teaching Materials using Statcal to Enhance Students' Statistical Literacy and Self-Efficacy
Authors: Elfitra Elfitra , Siregar Tiur Malasari , Frisnoiry Suci
Published: January 2025

Purpose of the study: This study addresses the challenges of limited teaching materials and the need for innovative tools to enhance students' statistical literacy and self-efficacy by developing inferential statistics teaching materials integrated with Statcal software. The primary aim is to create and evaluate the effectiveness of these materials in improving students' skills and confidence in statistical learning.
Methodology: The research employed a qualitative approach and involved collaboration with two material expert lecturers, one statistical program expert lecturer, and one student. The development process followed four stages: definition, design, development, and dissemination, ensuring a comprehensive framework for creating effective teaching resources
Main Findings: Validation results showed the materials were valid with a score of 4.21, practical with an 83.72% score, and effective with an 82.4% score, all in the good category. Additionally, the teaching materials significantly improved students' statistical literacy (72.78%) and self-efficacy (73.52%), categorized as good.
Novelty/Originality of this study: The utilizing interactive tools such as Statcal, students can understand statistical concepts more deeply through a practical and contextual approach. This is relevant to be applied to statistics learning in schools and universities, especially in preparing students to face the challenges of the digital data era. In addition, this study also encourages teachers to integrate technology in learning to create a more engaging and effective learning experience.
Strengthening Integrated Mutual Understanding of Social Sciences Learning in Islamic Education Institutions: A Comparative Study in Madrasas, Islamic Boarding Schools and Integrated Islamic Schools in Bengkulu City
Authors: Satria Irwan , Budrianto Budrianto
Published: January 2025

Purpose of the Study: This study aims to examine the role of social studies learning in strengthening mutual understanding among students in Islamic educational institutions in Bengkulu City. It explores how Islamic values, cultural integration, and national principles can be used as foundations to promote harmony and social cohesion within diverse educational contexts.
Methodology: A case study approach with a multiple-case type was employed, guided by Yin’s design of connecting data with theoretical propositions. The study began with theoretical propositions to shape the research framework, aligning data collection and analysis with pattern-matching techniques. Data were gathered through interviews, classroom observations, and document analysis, focusing on social studies teachers' practices and perspectives in three Islamic educational institutions.
Main Findings: The findings reveal that social studies teachers universally emphasize the importance of mutual understanding as a core objective in their teaching. They integrate Islamic principles, Pancasila (Indonesia's foundational philosophy), and local culture to foster tolerance, empathy, and collaboration among students. Teachers adopt diverse learning models and approaches, including discussion-based, problem-solving, and project-based learning, to contextualize lessons and encourage critical engagement. These strategies have significantly promoted mutual understanding and reduced social prejudices within the student body.
Novelty/Originality of the Study: This study uniquely highlights the strategic role of Islamic educational institutions in using social studies learning to strengthen mutual understanding. By connecting religion, national values, and cultural heritage, the study provides new insights into the transformative potential of education in shaping harmonious and inclusive communities, offering practical implications for policymakers and educators.
Social Practices of Literacy and Numeracy Through Culturally Responsif Teaching (CRT) Approach in Sociology Learning
Authors: Budiati Atik Catur , Liestyasari Siany Indria , Astutik Dwi , Parahita Bagas Narendra , Siregar Riadi Syafutra , Ghufronudin Ghufronudin
Published: January 2025

Purpose of Study: This study aims to identify social practices of literacy and numeracy using the CRT approach in Sociology learning.
Methodology: This research uses a descriptive qualitative approach with a phenomenology type. The data source consists of focus group discussion (FGD) results, observation, and document analysis. FGD involves sociology teachers in Soloraya, with the purposive sampling technique used to select informants. Observation was carried out directly by observing the sociology learning process in the class. Document analysis includes teaching modules, sociology learning gain, student worksheets, and other learning sets. Data validity was tested using source and method triangulation. Data analysis was done using Interpretative Phenomenology Analysis, encompassing four stages: bracketing, intuiting, analyzing, and describing.
Main Findings: The result of the research shows that teachers get a support system from government regulation, the Merdeka Mengajar platform, the learning community, the supervisor, and the subject teacher working group. Each of the parties plays a role that supports CRT-based literacy and numeracy learning. The learning activity can be identified in three things. Firstly, teachers hold the authority to accustom the students to using numeric data in the context of local culture. Secondly, teachers integrate numeric data from local cultures to make learning more relevant and contextual. Thirdly, teachers create an inclusive learning environment by accommodating numeric data in the context of local culture.
Novelty/Originality of Study: By applying CRT, sociology teachers teach literacy and numeracy skills and help students see the relevance of these skills in understanding and participating in social change.
Unraveling Intrinsic Motivation: The Key to Empowering Teacher Professional Growth
Authors: Mayangsari Dewi , Nawangsari Nur Aini Fardana , Yoenanto Nono Hery , Suminar Dewi Retno
Published: January 2025

Purpose of the Study: This study explores the pivotal role of intrinsic motivation in driving the professional development of early childhood education (ECE) and kindergarten teachers, focusing on how it influences their teaching practices, adaptability, and overall job satisfaction.
Methodology: A qualitative approach with a case study design was employed, involving purposively selected ECE and kindergarten teachers from multiple schools. Participants had at least five years of teaching experience and demonstrated active engagement in professional skill development. Data were gathered through in-depth interviews and participatory observations and then analyzed using thematic analysis to uncover recurring patterns and insights.
Main Findings: The study reveals that intrinsic motivation significantly shapes the professional growth of ECE teachers. Motivated teachers are likelier to adopt innovative teaching methods, integrate new technologies into their classrooms, and demonstrate resilience in managing challenges. They display a heightened sense of responsibility for their students’ holistic development and report greater job satisfaction. Moreover, intrinsic motivation fosters creativity and adaptability, enabling teachers to craft engaging learning experiences. This, in turn, positively impacts student outcomes, as intrinsically motivated teachers create dynamic, supportive environments that enhance student engagement and facilitate social-emotional growth.
Novelty/Originality of the Study: Underexplored connection between intrinsic motivation and professional development in early childhood education. The study underscores the need for fostering intrinsic motivation in teacher training programs by linking teacher motivation to innovation, resilience, and student engagement. Furthermore, it provides actionable insights into designing interventions and policies prioritizing intrinsic drivers, contributing to sustainable teacher development and improved educational quality.
Interactive H5P Framework-Based E-Learning Content in Artificial Intelligence Lectures of Indonesian Language and Literature
Authors: Daulay Muhammad Anggie Januarsyah , Yuhdi Achmad , Azis Adek Cerah Kurnia
Published: January 2025

Purpose of the study: This study aims to develop interactive e-learning content based on the H5P framework in Indonesian Language and Literature Artificial Intelligence lectures at the Indonesian Literature Study Program, Faculty of Languages and Arts, Universitas Negeri Medan with the formulation of the problem of how the content development takes place and how the content is feasible.
Methodology: This study uses the Research and Development method with the ADDIE model research procedure (Analysis, Design, Development, Implementation, and Evaluation).
Main Findings: E-learning based on the H5P framework in Indonesian Language and Literature Artificial Intelligence lectures is very effective. Validation by media experts showed a very good assessment (89.58% for episode 1 and 97.91% for episode 2). Validation by material experts also showed similar results (93.18% for episode 1 and 97.72% for episode 2). The interactive content developed in the form of video podcasts was able to improve student understanding and engagement through interactive quizzes and simulations.
Novelty/Originality of this study: This study develops interactive learning content based on H5P in a new context, namely the Artificial Intelligence course for Indonesian Language and Literature.
Steps of Exact and Analytic Solutions of Ordinary Differential Equations using MAHA Integral Transform and Its Applications
Authors: Alsaoudi Maha , Sharieh Ahmad , Guiatni Ahlam , Gharib Gharib
Published: January 2025

Transformation such as integral transform is needed to obtain the exact solutions for linear ordinary differential equations (ODEs) with constant coefficients of higher orders. MAHA transformation exact solution of ODEs is simpler and easier than the previous with two parameters. The major steps of this transform are applying the MAHA transform on the given equation followed by taking the inverse transform. The general steps in numerical solutions involve defining the ODE as a function, defining initial conditions and the range of the independent variable, using an appropriate ODE solver function, and calling the solver and plotting the solution using a programming language. The exact and analytical solutions are validated. Both methods are easy and simple to be deployed in computing scientific applications such as nuclear physics and medical applications.
One – Sided Approximation in Lp(X)
Authors: Zaboon Ali Hussein
Published: January 2025

The aim of this research to study the approximation of functions in the space- 𝐿𝑝 by the “algebraic polynomial” in terms of the” average modulus” of the k-order also, we will estimate the degree of the (O-S- A), (means one – sided approximation) in term of averaged modulus where all the results which number is eleven we need to prove the main theorem that (the degree of best (O-S- A) of 𝑓 by trigonometric polynomials of order 𝑛 in 𝐿 𝑝 (𝑋 ), (𝐸̃𝑛 (𝑓)𝑝) ) is less than or equal to (Averaged modulus of smoothness of 𝑓 of order- 𝑘, (𝜏𝑘 (𝑓 , 1 𝑛 ) 𝑝 ) ) have been proven, It has also been proven the converse theorem for the main theorem in this research.
EVALUATION AND IMPROVEMENT OF PHOTOVOLTAIC POWER PLANTS PERFORMANCE
Authors:   PhD Student, National University of Science and Technology Politehnica Bucharest,
Romania, 2INCDIE ICPE-CA Bucharest, e-mail:dana.sima@icpe-ca.ro, ORCID ID, SIMA Daniela-Adriana , ANGHELIṬĂ Paula ,   INCDIE ICPE-CA Bucharest, e-mail: paula.angheliţă@icpe-ca.ro, ORCID ID, PURECE Cristian ,   INCDIE ICPE-CA Bucharest, e-mail:cristian.purece@icpe-ca.ro, ORCID ID
Published: January 2025

Abstract: Improving the performance of photovoltaic systems by increasing their annual energy production, reducing system capital costs and operating and maintenance costs is a global priority and implies a permanent concern for evaluating and increasing their efficiency. Starting from the calculation of the efficiency of a photovoltaic panel at the customer, according to the catalog data, with calculation examples, the article analyzes the three stages for determining the efficiency in the laboratory: measuring the spectral response (SR), determining the amount of external and internal efficiency and drawing the graph the current-voltage (I-V) characteristic to evaluate the electrical efficiency. The main objective of the article is to provide clear and concise analysis for laboratory tests of photovoltaic cells and panels.
GREEN HYDROGEN IN INDONESIA: AN OVERVIEW OF PRESENT STATUS, CHALLENGES, AND FUTURE POTENTIAL
Authors:   Ph. D Candidate, Department of Electrical Engineering and Information Technology, Universitas Gadjah Mada, Indonesia,, Arbye S , WIJAYA Fransisco Danang ,   Prof., Department of Electrical Engineering and Information Technology, Universitas Gadjah Mada, Indonesia,, PURWANTO Maulana Rizal ,   Master Candidate, Master Program of System Engineering, Universitas Gadjah Mada, Indonesia, BUDIMAN Arief
Published: January 2025

Abstract: Indonesia targets a clean energy mix of 31% by 2050 and net zero emissions by 2060. Green hydrogen is seen as a key strategy. This study examines the current state, challenges, and future potential of green hydrogen development in Indonesia. Despite high potential, technical, economic, social, and regulatory hurdles exist. The government is initiating pilot projects, regulations, and collaborations to accelerate the transition to a green hydrogen economy. This study aims to inform and recommend strategies for optimizing this development.
RAMIE FIBRE REINFORCED POLYMER COMPOSITES: A REVIEW
Authors:   Dept.of Civil Engineering, UTD,Chhattisgarh Swami Vivekanand Technical University, Bhilai, India, e-mail: agniveshsinha007@gmail.com, SINGH Pooja , SINHA Agnivesh Kumar ,   Dept.of Mechanical Engineering, Rungta College of Engineering & Technology, Bhilai, India, e-mail: agniveshsinha007@gmail.com, RATHORE Ram Krishna ,   Dept.of Mechanical Engineering, Rungta College of Engineering & Technology, Bhilai, India, e-mail: krish.rathore@gmail.com
Published: January 2025

Abstract: Natural fibre reinforced polymer composites are achieving a great response in the current composite technology and structural application. particularly ramie fibre reinforced polymer composites, which give a great response because of their good tensile strength. Ramie fibre reinforced polymer composite provides a special integration of environmental sustainability, thermal stability and mechanical strength, making them a unique application in the research area of composite materials. This review provides an overview of the mechanical and physical properties of ramie fibre. Moreover, it also elucidates the discussion of the mechanical attributes of ramie fibre reinforced polymer composites and the factors affecting them. Further, this review provides the research gap and future scope in the relevant domain. Through the study, the researchers will be able to understand how the ramie fibre reinforced polymer composite can be used as an alternative to traditional composite materials.
HARNESSING COMPETITIVE INTELLIGENCE: THE DYNAMICS OF ROMANIA'S ENERGY SECTOR
Authors:   Lecturer Ph.D. Eng., Dept. of Petroleum Geology and Reservoir Engineering, Petroleum and Gas University of Ploiesti, Romania, PROȘCANU Miruna , SAFTIUC Bogdan ,   PhD Student, Bucharest University of Economic Studies, Bucharest, Romania, bogdan.saftiuc@fabiz.ase.ro, ORCID ID, RĂDOI Mireille ,   Assoc. Prof. Dr., Bucharest University of Economic Studies, Bucharest, Romania, mireille.radoi@fabiz.ase.ro, ORCID ID, NEN Madlena ,   Prof., Bucharest University of Economic Studies, Bucharest, Romania, madlena.nen@fabiz.ase.ro ORCID ID, ALBU Octavia ,   PhD Student, Bucharest University of Economic Studies, Bucharest, Romania, albuoctavia19@stud.ase.ro ORCID ID
Published: January 2025

Abstract: Competitive intelligence (CI) gathering, analysis, and application are crucial to organizational effectiveness in today's dynamic and competitive corporate world. CI's energy industry position in Romania's economy is examined in this article. Interview case studies examined how CI approaches affected major Romanian energy companies' operations. Academic debate has stressed the importance of adapting CI approaches to industrial circumstances, especially complex energy. This qualitative study used semi-structured interviews with management stakeholders to examine energy solid CI programs' goals, techniques, challenges, and effects. This research shows that energy businesses use CI to make tactical decisions, especially when managing complex regulations, assessing competition strategies, and spotting market trends.
Elementos y modelos de regulación de la micromovilidad compartida
Authors: Bach Coma Xavier , Tarrés Vives Marc
Published: January 2025

SUMARIO: 1. INTRODUCCIÓN. EXPERIENCIAS MÁS ALLÁ DE LA LEY DE MOVILIDAD SOSTENIBLE.— 2. LA REGULACIÓN: EL EQUILIBRIO PARA GOBERNAR LA MICROMOVILIDAD COMPARTIDA: 2.1 Los operadores privados. Aportando innovación y servicio; 2.2 Las administraciones locales. Velando por el espacio público; 2.3 Elementos sujetos a colaboración público-privada.— 3. CARACTERÍSTICAS Y RIESGOS DE LOS MODELOS DE REGULACIÓN IMPLANTADOS: 3.1 Modelo Barcelona: número de vehículos limitado, número de operadores ilimitado; 3.2 Modelo París: una regulación basada en numerus clausus; 3.3 Modelo Berlín: una laissez faire policy; 3.4 Modelo Barcelona metropolitana: un sorteo flexible.— 4. CONCLUSIONES. LA NECESIDAD DE UN MARCO NORMATIVO COMÚN.— 5. BIBLIOGRAFÍA.
Hacia una regulación para las plataformas digitales que prestan servicios de movilidad
Authors: Navarro Pérez Fernanda , Herrera Tapia Sebastián
Published: January 2025

SUMARIO: 1. INTRODUCCIÓN.— 2. EL CASO DE LA CIUDAD DE CHICAGO.— 3. EL CASO DE CHILE.— 4. CONCLUSIONES.— 5. BIBLIOGRAFÍA.
Litigación climática en Estrasburgo
Authors: Salinas Alcega Sergio
Published: January 2025

Las sentencias de abril de 2024 en los asuntos Duarte, KlimaSeniorinnen y Carême materializan la llegada de la litigación climática al Tribunal de Estrasburgo. Sin embargo, la naturaleza del sistema de la Convención conlleva diferencias respecto al tratamiento a dar a ese tipo de asuntos en relación a otros foros internacionales. Esas diferencias se sintetizan en la necesidad del Tribunal de mantener un equilibrio entre el sentir social respecto de la litigación climática y los impactos de esos asuntos en su funcionamiento. Este estudio se centra en el análisis de cómo el Tribunal ha intentado mantener ese equilibrio en el contexto de sus primeras sentencias climáticas, marcando el camino para lo que pueda llegar con posterioridad.
El marco jurídico regulatorio europeo de la inteligencia artificial
Authors: Hernández Ramos Mario
Published: January 2025

La inteligencia artificial es una tecnología que está afectando a todos los niveles de una manera profunda. Es imprescindible que su utilización y los efectos que produce sean objeto de regulación tanto para limitar sus riesgos e impactos como para centrar su desarrollo en la dignidad humana. Europa ha tomado la iniciativa regulatoria, por parte de sus dos organizaciones más significativas desde el punto de vista de los derechos fundamentales: la Unión Europea y el Consejo de Europa. Ambas han aprobado en 2024 de manera paralela dos normas que entendemos perfectamente complementaria: el Reglamento de inteligencia artificial de la Unión Europea y la Convención Marco sobre inteligencia artificial y derechos humanos, democracia y Estado de Derecho.
Estudio de las órdenes europeas de producción y conservación: un instrumento eficaz para la obtención transfronteriza de pruebas penales electrónicas
Authors: Gómez Amigo Luis
Published: January 2025

En este trabajo se estudian las nuevas órdenes europeas de producción y conservación de pruebas penales electrónicas, establecidas por el Reglamento (UE) 2023/1543 y la Directiva UE 2023/1544, ambos de 12 de julio de 2023, y que serán aplicables a partir del 18 de agosto de 2026. Con ellas, la Unión Europea pretende instaurar un instrumento efectivo para la obtención transfronteriza de pruebas penales electrónicas, que se adapte al carácter volátil y la dimensión transfronteriza de las pruebas electrónicas. Por medio de las órdenes europeas de producción y conservación la autoridad competente del Estado emisor puede ordenar directamente a un prestador de servicios que ofrezca servicios de comunicaciones electrónicas y de la sociedad de la información en la Unión que entregue o conserve, respectivamente, pruebas penales electrónicas, con independencia de la ubicación de los datos.
Barriers and Facilitators in Accessing HIV Prevention Services for Men Having Sex with Men (MSM): A Comprehensive Analysis
Authors: Sanni Felix , Abang Roger , Emmanuel Godwin , Kalaiwo Abiye , Motilewa Olugbemi , Amechi Paul , Umoh Paul , Ochonye Bartholomew Boniface
Published: January 2025

Objectives: This study explores MSM’s perspective on HIV prevention needs, barriers, facilitators, and retention strategies in prevention programs.
Method: In-depth interviews, key informant interviews, focus group discussions, and structured questionnaires were used to interview urban and rural Nigerian men having sex with men (MSM) aged 18 and older. Candidates were recruited using snowball referrals. Data analysis used IBM-SPSS 28.
Result: Urban residents (67.6%) had more secondary education than rural residents (53.7%) in the 299 MSM research. Drug use was 84.2% in urban and 61.3% in rural MSM. The majority of rural MSM (90.1%) had multiple sexual partners, unlike urban residents (70.1%). Compared to rural people (8.0%), urban MSM reported greater sexual abuse rates (22.0%). Over 80% of MSM used condoms, attended HIV meetings, visited STI clinics, and used lubricant. However, less than 80% would attend a peer-led clinic or have peers assist with drug adherence. MSM attending private healthcare facilities stated that distance to service delivery points was a major barrier (60.6%). However, those attending public health facilities cited lack of information (67.0%), unpleasant facilities (76.1%), stigma (81.8%), and incapacity to handle police harassment (74.4%) as key hurdles to treatment. MSM views on HIV preventive programs are examined in this qualitative study. Despite economic limits, respondents preferred private hospitals due to confidentiality, stigmatisation, and discrimination difficulties at public hospitals, which hinder treatment acceptance.
Conclusion: MSM in urban and rural settings have different HIV risk behaviours and access issues, requiring specific interventions.
Analysis of the Impact of the Shift in Investigative Authority from Sector Police (Polsek) to Resort Police (Polres) on the Law Enforcement Process and Fulfillment of Justice for the Community in the Jurisdiction of the Bangka Belitung Islands Regional Police
Authors: Elpiadi  , Abdul Rasyid Saliman
Published: January 2025

The Indonesian National Police (Polri) holds a central role in safeguarding public security, maintaining order, and enforcing the law in Indonesia. The Chief of the National Police's Decision Number: Kep/613/III/2021 introduces a strategic shift of investigative authority from Sector Police (Polsek) to Resort Police (Polres) in designated areas, including within the Bangka Belitung Islands Regional Police jurisdiction. This transformation is designed to optimize preventive functions at the Polsek level. This study employs a normative juridical method combined with an empirical approach through regulatory analysis and interviews with law enforcement officers and community members. The results reveal that this policy shift positively affects the efficiency of case handling while refocusing the Polsek’s role on community security and public service. Several determining factors, such as geographical distance, report volume, and accessibility, significantly influence the selection of Polseks exempt from investigative duties. The findings suggest that delegating investigative tasks to Polres supports better resource allocation for Polri personnel, enhances community-based policing, and ensures preventive measures are implemented effectively. These changes aim to create a more efficient and equitable system of law enforcement that accommodates the specific needs of various local contexts.
Numerical differentiation of fractional order derivatives based on inverse source problems of hyperbolic equations
Authors: Wang Zewen , Qiu Shufang , Rui Xiuxing , Zhang Wen
Published: January 2025

In this paper, we mainly study the numerical differentiation problem of computing the fractional order derivatives from noise data of a single variable function. Firstly, the numerical differentiation problem is reformulated into an inverse source problem of first order hyperbolic equation, and the corresponding solvability and the conditional stability are provided under suitable conditions. Then, four regularization methods are proposed to reconstruct the unknown source of hyperbolic equation which is the numerical derivative, and they are implemented by utilizing the finite dimensional expansion of source function and the superposition principle of hyperbolic equation. Finally, Numerical experiments are presented to show effectiveness of the proposed methods. It can be conclude that the proposed methods are very effective for small noise levels, and they are simpler and easier to be implemented than the previous PDEs-based numerical differentiation method based on direct and inverse problems of parabolic equations.
A Vieta–Lucas collocation and non-standard finite difference technique for solving space-time fractional-order Fisher equation
Authors: Kashif Mohd
Published: January 2025

The purpose of the article is to analyze an accurate numerical technique to solve a space-time fractional-order Fisher equation in the Caputo sense. For this purpose, the spectral collocation technique is used, which is based on the Vieta–Lucas approximation. By using the properties of Vieta–Lucas polynomials, this technique reduces the nonlinear equations into a system of ordinary differential equations (ODEs). The non-standard finite difference (NSFD) method converts this system of ODEs into algebraic equations which have been solved numerically. Moreover, the error estimate is investigated for the proposed method. To show the accuracy and efficiency of the technique, the obtained numerical results are compared with the analytical results and existing results of the particular forms of the considered fractional order models through error analysis. The important feature of this article is the exhibition of variations of the field variable for various values of spatial and temporal fractional order parameters for different particular cases.
Dissipative measure-valued solutions to the magnetohydrodynamic equations
Authors: Yang Jianwei , Wang Huimin , Shi Qihong
Published: January 2025

In this paper, we study the dissipative measure-valued solution to the magnetohydrodynamic equations of 3D compressible isentropic flows with the adiabatic exponent γ > 1 and prove that a dissipative measure-valued solution is the same as the standard smooth classical solution as long as the latter exists, provided they emanate from the same initial data (weak–strong) uniqueness principle.
Solving class of mixed nonlinear multi-term fractional Volterra-Fredholm integro-differential equations by new development of HAM
Authors: Eshkuvatov Zainidin , Laadjal Zaid , Ismail Shahrina
Published: January 2025

This work implements the standard Homotopy Analysis Method (HAM) developed by Professor Shijun Liao (1992), and a new development of the HAM (called ND-HAM) improved by Z.K. Eshkuvatov (2022) in solving mixed nonlinear multi-term fractional derivative of different orders of Volterra-Fredholm Integrodifferential equations (FracVF-IDEs). Other than that, the existance and uniqueness of solution as well as the norm convergence with respect to ND-HAM, were proven in a Hilbert space. In addition, three numerical examples (including multi-term fractional IDEs) are presented and compared with the HAM, modified HAM and ”Generalized block pulse operational differentiation matrices method” developed in previous works by illustrating the accuracy as well as validity with respect to ND-HAM. Empirical investigations reveal that ND-HAM and the modified HAM yields the same results when control parameter ℏ is chosen as ℏ = −1 and is comparable to the standard HAM. The findings discovered that the ND-HAM is highly convenient, effective, as well as in line with theoretical results.
Terminal value problem for the system of fractional differential equations with additional restrictions
Authors: Boichuk Oleksandr , Feruk Viktor
Published: January 2025

This paper deals with the study of terminal value problem for the system of fractional differential equations with Caputo derivative. Additional conditions are imposed on the solutions of this problem in the form of a linear vector functional. Using the theory of pseudo-inverse matrices, we obtain the necessary and sufficient conditions for the solvability and the general form of the solution of this boundary-value problem. In the one-dimensional case, the obtained results are generalized to the case of a multi-point boundary-value problem. The issue of obtaining similar results for the terminal value problem for the system of fractional differential equations with tempered and Ψ–tempered fractional derivatives of Caputo type is considered.
Using Chebyshev’s polynomials for solving Fredholm integral equations of the second kind
Authors: Ezquerro José Antonio , Hernández-Verón Miguel Ángel
Published: January 2025

The main problem with the Newton method is the computation of the inverse of the first derivative of the operator involved at each iteration step. Thus, when we want to apply the Newton method directly to solve an integral equation, the existence of the inverse of the first derivative is guaranteed, when the kernel is sufficiently differentiable into any of its two components, through its approximation by Taylor’s polynomial. In this paper, we study the case in which the kernel is not differentiable in any of its two components. So, we present a strategy that consists of approximating the kernel of the nonlinear integral equation by a Chebyshev interpolation polynomial, which is separable. This allows us to explicitly calculate the inverse of the first derivative operator in each step of the Newton method and then approximate a solution of the approximate integral equation.
Spectroscopically Resolved Partial Phase Curve of the Rapid Heating and Cooling of the Highly Eccentric Hot Jupiter HAT-P-2b with WFC3
Authors: Jacobs Bob , Désert Jean-Michel , Lewis Nikole , Challener Ryan C. , Mayorga L. C. , de Beurs Zoë L. , Parmentier Vivien , Stevenson Kevin B. , de Wit Julien , Barat Saugata , Fortney Jonathan , Kataria Tiffany , Line Michael
Published: January 2025

The extreme environments of transiting close-in exoplanets in highly eccentric orbits are ideal for testing exoclimate physics. Spectroscopically resolved phase curves not only allow for the characterization of their thermal response to irradiation changes but also unveil phase-dependent atmospheric chemistry and dynamics. We observed a partial phase curve of the highly eccentric close-in giant planet HAT-P-2b (e = 0.51, M = 9M
Jup) with the Wide Field Camera 3 aboard the Hubble Space Telescope. Using these data, we updated the planet's orbital parameters and radius and retrieved high-frequency pulsations consistent with the planet-induced pulsations reported in Spitzer data. We found that the peak in planetary flux occurred at 6.7 ± 0.6 hr after periastron, with heating and cooling timescales of

9
.

0

−
2.1

+
3.5

hr and

3
.

6

−
0.6

+
0.7

hr, respectively. We compare the light curve to various 1D and 3D forward models, varying the planet's chemical composition. The strong contrast in flux increase and decrease timescales before and after periapse indicates an opacity term that emerges during the planet's heating phase, potentially due to more H− than expected from chemical equilibrium models. The phase-resolved spectra are largely featureless, which we interpret as indicative of an inhomogeneous dayside. However, we identified an anomalously high flux in the spectroscopic bin coinciding with the hydrogen Paβ line, and that is likely connected to the planet's orbit. We interpret this as due to shock heating of the upper atmosphere given the short timescale involved, or evidence for other star−planet interactions.
Jetted Seyfert Galaxies at z = 0: Simulating Feedback Effects on Galactic Morphology and Beyond
Authors: Goddard Julianne , Shlosman Isaac , Romano-Diaz Emilio
Published: January 2025

We use high-resolution cosmological zoom-in simulations to model feedback from Seyfert-type supermassive black hole (SMBH) jets onto galaxies with identical dark matter (DM) halos of log M/M
⊙ ∼ 11.8. The low-mass,  ∼106
M
⊙, seed SMBHs have been introduced when the parent DM halos have reached log M/M
⊙ ∼ 11. In a controlled experiment, we vary only the efficiency of the SMBH accretion and focus on galaxies and their immediate environment properties. Our results show that the active galactic nucleus jet feedback has a substantial effect on the basic properties of Seyfert-type galaxies, such as morphology, gas fraction and distribution, star formation rate and distribution, B/D ratio, DM halo baryon fraction, and properties of the circumgalactic medium and beyond. These have been compared to a galaxy with supernovae only feedback. We focus on the energy deposition by the jet in the interstellar medium (ISM) and intergalactic gas medium, and follow the expansion of the multiple jet cocoons to ∼2 Mpc. We find that the jet–ISM interaction gradually pushes the star formation to larger radii with increasing accretion efficiency, which results in increased mass of the outer stellar disk, which is best fit as a double-exponential disk. Furthermore, we compare our galaxies and their properties with the observed nearby Seyfert galaxies, including the scaling relations, and find a close agreement, although statistical analysis of observed Seyferts is currently missing. In a forthcoming paper, we focus on the evolution of these objects at z ≲ 10 and study the effect of the SMBH seeding redshift.
Life history and behavioural observations during the rearing of Dira clytus clytus (Linnaeus, 1764) (Insecta, Lepidoptera, Nymphalidae), with notes on implications for climate change adaptation
Authors: Mecenero Silvia , Kirkman Stephen P.
Published: January 2025

Lepidoptera are known to alter their behaviour and phenology in response to climatic conditions. Understanding these responses is important for the conservation of Lepidoptera species, especially those that are not widely distributed. Individuals of Dira clytus clytus, a South African endemic butterfly with a distribution in the southern parts of the country, were reared in captivity from the egg phase to the adult phase, to observe behaviour and phenology in the various life stages. Life history stages concurred with previous observations made on this subspecies, but additional photographs are presented for the various phases. There are clearly two pupal, and thus adult emergence, phases in spring and early summer. Four batches of eggs resulted from these adults, and the larvae from these eggs were also reared although none of them survived to the pupation phase. The timing of the two pupal phases was compared to climatic variables (temperature and rainfall) and it was found that pupation followed soon after cold temperature. This is indicative that D. c. clytus can change its phenology and voltinism in response to climatic conditions, which may allow for plasticity in responding to climate change. However, more research is required to understand how climate change would impact this endemic species.
Les indicateurs sociaux, révélateurs des tensions entre aspirations à la durabilité et préservation des modèles d’affaires existants
Authors: Coullaré Jérôme
Published: January 2025

La transposition en droit français de la directive européenne de durabilité (Corporate Sustainability Reporting Directive, CSRD) représente une occasion rare de comprendre « à chaud » la façon dont les indicateurs de diversité peuvent être repensés dans les grandes entreprises. Pensée comme une opportunité de réforme morale, la Directive encourage les grands Groupes du CAC40 à reconsidérer leurs indicateurs de diversité pour répondre à une nouvelle exigence de publication : rendre compte de thématiques « extra-financières » au même titre que les thématiques financières, dans un rapport intégré de durabilité. En mobilisant l’économie des grandeurs et la sociologie de la quantification, nous explorons les façons dont les accords se construisent à l’intérieur d’une même organisation pour choisir les indicateurs de diversité que l’entreprise donnera finalement à voir au prisme de la CSRD ; à cet égard, nous analysons les conflits de valeurs entre acteurs, nés de l’illusion d’une quantification neutre et objectivante, du rôle de figures d’autorité (hiérarchie et cabinets de conseil), de l’inertie décisionnelle liée au poids des outils préexistants aux controverses. Nos travaux montrent que la notion de double-matérialité, pierre angulaire de la CSRD et dont le rôle est de permettre de justifier la stratégie de l’organisation au regard des risques-opportunités-impacts sur ses parties prenantes, s’appuie sur un postulat théorique qui reste à démontrer (la compatibilité entre aspiration à la durabilité et préservation des modèles d’affaires existants) et des pratiques qui entravent l’émergence des valeurs de durabilité prônées par la CSRD.
Impact des conflits armés sur la santé des enfants en République centrafricaine
Authors: Tchakounté Dimitri , Molambo Sambi Loïc
Published: January 2025

Depuis plusieurs décennies, la République centrafricaine (RCA) a été la scène d’une succession de coups d’État qui se sont accompagnés de conflits armés dans plusieurs préfectures du pays. Durant ces conflits armés, les enfants souffrent très souvent de malnutrition aiguë. Cette étude vise à analyser l’impact des conflits armés de 2003-2008 et de 2012-2014 sur la santé des enfants en RCA à partir des données des Enquêtes par grappes et à indicateurs multiples collectées en 2010 et 2018. Notre stratégie d’identification repose sur l’exploitation des variations temporelles et spatiales entre les cohortes de naissance et de préfectures pour mesurer l’exposition des enfants aux conflits. À partir de l’estimation de la méthode des doubles différences, nous trouvons que les Z-scores taille-pour-âge sont inférieurs de 0,638 et 0,538 écart-type pour les enfants nés pendant le conflit de 2003-2008 et de 2012-2014, respectivement, et les Z-scores poids-pour-âge sont inférieurs de 0,212 et 0,353 écart-type pour les enfants nés pendant le conflit de 2003-2008 et de 2012-2014, respectivement. Nous avons également examiné l’impact de la durée totale d’exposition aux conflits, et les résultats indiquent qu’un mois supplémentaire d’exposition au conflit armé de 2003-2008 réduit significativement les Z-scores taille-pour-âge et poids-pour-âge de 0,00561 et 0,00215, respectivement. Des analyses de robustesse ont également été effectuées en prenant en compte les migrations, les niveaux d’intensité des conflits et le niveau de richesse du ménage, et les résultats conduisent à des conclusions similaires à celles trouvées précédemment.
Analyse des effets de la diplomatie commerciale sur le commerce extérieur du Cameroun
Authors: Tamno Tekam Jacques Éric , Mpabe Bodjongo Mathieu Juliot
Published: January 2025

L’objectif de cet article est d’estimer les effets de la diplomatie commerciale sur les échanges bilatéraux du Cameroun. En s’inspirant d’un modèle de gravité structurel sur un échantillon de 190 pays partenaires du Cameroun sur la période 2006-2016, les résultats révèlent que la diplomatie commerciale mise en œuvre au Cameroun favorise, d’une part, les exportations bilatérales, avec un effet plus important pour les matières premières et, d’autre part, favorise beaucoup plus les importations bilatérales des biens de consommation finale. De façon spécifique, les missions étrangères et les journées économiques et commerciales (foires, expositions et salons organisés à l’étranger) affectent positivement les échanges bilatéraux, alors que les visites officielles du chef d’État n’augmentent que les importations bilatérales des biens de consommation finale et de capital. En outre, les résultats suggèrent que les accords bilatéraux, les accords de l’OMC et la facilité d’obtention d’un visa d’entrée au Cameroun favorisent les échanges bilatéraux.
Les ports vus du bord
Authors: Flécher Claire
Published: January 2025

Nombreux sont les travaux qui ont étudié les transformations des espaces portuaires depuis les années 1970, mais rares sont ceux qui s’intéressent à leurs effets sur le travail de celles et ceux qui utilisent ces infrastructures : les marins et leurs commanditaires. Cet article vise à mettre au jour comment ces évolutions ont modifié le travail des marins, ainsi que leur rapport aux espaces et aux professionnels portuaires. L’escale est en effet de plus en plus réduite à un temps commercial régi par le flux tendu, où l’intensification du travail a réduit à peau de chagrin les possibilités de sortie. Elle reste cependant un espace-temps d’échanges et de négociations entre les divers professionnels qui y exercent leur activité, dans un huis-clos qui exclut dorénavant les profanes, mais s’étend à l’ensemble des interactions que suscitent ces opérations commerciales.