bluuebunny/crossref_metadata_2025 huggingface dataset:
Plataformização do Trabalho
Authors: Joselita Olivia da Silva Monteiro  , Albani de Barros  , Manuella Aragão Pinheiro
Published: December 2024

O presente artigo tangencia o fenômeno atual da plataformização do trabalho num contexto de acelerada incorporação das Tecnologias da Informação e Comunicação (TICs). Respaldado em pesquisa bibliográfica e documental demonstra, amparado no materialismo histórico-dialético, a origem e os determinantes históricos das tecnologias que incidiram no surgimento das plataformas digitais. Seguidamente, aborda as consequências para a classe trabalhadora corroboradas pelas modificações na legislação protetiva do trabalho. Demonstra ainda, no que concerne a relação dialética, a potência que o desenvolvimento das forças produtivas possui de diminuir o processo de produção ao passo do aumento de jornadas e intensificação do ritmo laboral, exatamente pela introdução de novos aparatos tecnológicos. Afirma-se que o tempo presente exponencia o paradoxo de avanços tecnológicos outrora inimagináveis, justapostos a brutal exploração e precarização do trabalho com a explosão da informalidade e do empreendedorismo.
PREDICTION OF SEISMIC INTENSITY IN URBAN AREAS. CASE STUDY OF THE CITY OF BATNA, ALGERIA
Authors: Kamel Belkhiri  , Abdelmalek Rerboudj  , Nassim Bella
Published: December 2024

Knowledge of a non-instrumental measurement is one of the most remarkable scientific assets; unfortunately, in seismology, it is considered the least predictable, but it does play an important role in assessing seismic risk. Batna, the capital of the Aurès region, is located in northeastern Algeria at an elevation of 1058 me, 435 km southeast of the capital Algiers, and is one of Algeria’s five most important cities. Batna is also a highly vulnerable city due to the proliferation of dwellings that do not comply with seismic recommendations. Thus, it was classified as a low seismicity zone based solely on historical data from recent decades. Our work consists of analyzing and correlating historical and instrumental seismicity at the regional and local levels:the cataloged seismicity data for northeastern Algeria from 1856 to 2018 includes 3354 epicenters. To that end, our approach is based on three major axes: (a) seismic data analysis, (b) determination of seismic intensity attenuation for a target zone (the city of Batna), and (c) assessment of seismic hazardin terms of maximum expected intensity for a given return time. Using the distribution of GUMBEL Extreme Values (I and III), we were able to identify the reasonable maximum intensity limit for the city of Batna, which was estimated to be VII (MM) for a 100-year return period. This assessment provides critical support and a sound reference for the risk scenario to warn public authorities and citizens about the damages that may result from the occurrence of future earthquakes, allowing for the development of appropriate ORSEC plans and a strategy for managing and reducing seismic risk.
REINTEGRATING PRODUCTIVE ACTIVITIES IN URBAN SPACES: A COMPARATIVE ANALYSIS OF STRATEGIC URBAN PLANNING IN BRUSSELS AND VIENNA
Authors: Narimene Boutemine  , Meriem Chabou-Othmani
Published: December 2024

Since the 2007 financial crisis, the strategic role of industrial manufacturing in urban economies has been increasingly recognized in the United States and Europe. The concept of the productive city represent a new vision for urban development that integrates living and production spaces. The integration of productive activities into urban areas poses a significant challenges, but also offers opportunities to foster more resilient and sustainable urban models. This paper examines the urban and economic policies implemented in two European cities, Brussels and Vienna, by conducting a comparative analysis as a research method, with a focus on the types of activities defined by urban production and the spatial perspective. The findings of our analysis enabled us to develop recommendations for public authorities concerning the implementation of the productive city. Our results further illustrate that the productive city is not solely determined by the spatial distribution or classification of activities; rather, it represents a strategic approach aimed at establishing a development framework responsive to the specific economic dynamics of each context. Achieving this requires a clear articulation of objectives, the deployment of suitable regulatory instruments, and the adoption of participatory governance mechanisms.
Ethics and Values in Project Management Stages in Construction Industry
Authors: Fatma Al-Zahraa Sami  , Asiah Abdul Rahim
Published: December 2024

The main aim of this paper is to examine the awareness of the principles of ethics among the professionals in Project Management in construction industry. The objectives of this paper are as follows: Firstly, to compare and review between the concept of ethics from Western and Islamic perspective by evaluating the principles and practice of ethics when the professionals carry out their duty. Secondly, to investigate the wide range of ethical problems faced at project management stages during construction period. Thirdly, to explore solutions that can be utilized and applied among professionals in construction industry.
Previous studies showed that ethics and values is the branch of philosophy that investigates morality and the ways of thinking that guide human behavior. Ethics involve examining moral standards of society and asking how these standards are reasonable or unreasonable.
In the construction industry there are two main levels to consider in relation to ethics and values in terms of professionals and corporate/organizational ethics. Professionalâ€™s ethics refer to the behavior expected of individual or industry or a group within the industry that was bound by a set of principles. However, it appears that in practice professionals in the building industry deemed to behave unethical when implementing project management on various stages. This arises negative impact and causes a number of problems to the public.
The methodology applied will be table research to professionals for project management stages in construction industry in Malaysia. The outcome of this paper will benefit the professionals in applying good ethics and values in various stages in of project management in construction industry terms of awareness and its application.
Lung Ultrasound: Breaking Free from Artifact Labels and Misnomers
Authors: Kapisyzi Prof. Perlat
Published: December 2024

Background

Lung ultrasound (LU) has now become an indispensable diagnostic tool, fulfilling his prediction. However, outdated concepts and terminologies in LU interpretation require reevaluation to align with current clinical knowledge.

Aim of Study

The study aims to modernize lung ultrasound (LU) interpretation by transitioning from artifact-based terminologies, such as A-lines and B-lines, to nomenclature that emphasizes anatomical and clinical significance. This approach seeks to enhance diagnostic precision and utility in critical care and respiratory medicine.

Method

After CT examination a review and reinterpretation of LU findings were performed, integrating insights from over 600 patient ultrasound examinations. The study redefined common terminologies like A-lines, B-lines, and C-lines based on their anatomical origins and clinical relevance. A novel diagnostic framework—Merlin’s space, including the Healthy and Sick Bat Signs—was introduced to differentiate normal from pathological lung conditions.

Results

A-lines were redefined as horizontal hyperechoic lines representing air-tissue interfaces, observed in both healthy lungs and pathological states (e.g., abscesses, COPD, asthma, pulmonary embolism, bronchiectasis hydropneumothorax).
B-lines were interpreted as vertical streaks indicating interstitial fluid, with the number reflecting the severity of conditions like pulmonary edema and inflammation. Advanced cases exhibited a "waterfall sign."
C-lines were clarified as pleural irregularities rather than artifacts, indicative of structural changes such as fibrosis or chronic inflammation.
Merlin’s space was systematically evaluated through its components: the twinkling white area, grey-in-black zone, and rib shadows, enabling rapid differentiation between healthy (Healthy Bat Sign) and diseased states (Sick Bat Sign).
Conclusions

This study advocates for a paradigm shift in LU interpretation, focusing on anatomical and clinical findings rather than artifact-based descriptions. By adopting descriptive and pathology-oriented nomenclature, clinicians can improve diagnostic accuracy and make timely, informed decisions. The proposed framework—incorporating the Healthy and Sick Bat Signs—offers a practical, radiation-sparing alternative to traditional imaging methods, aligning LU practice with modern medical standards. This distinct approach to pulmonary ultrasound interpretation draws upon the groundbreaking work of Prof. Daniel Lichtenstein and the efforts of all who have championed the value of this examination. While this paradigm shift may not be immediately embraced, the article trusts in the ethical understanding of its audience and draws inspiration from the wisdom of Charles Sidney Burwell:

“Half of what we are going to teach you is wrong, and half of it is right. Our problem is that we don't know which half is which.”
KADO SPESIAL: Strategic Innovation for Conservation Area Management in Pieh Island National Marine Protected Area, West Sumatra
Authors: Irfansyah Rahmat , Kurniawan Muh. Firdaus Agung Kunto , Mahardhika R. Hernan , Nugroho Fajar , Laia Dominikus Yoeli Wilson
Published: December 2024

The Pieh Island National Marine Protected Area (NMPA) is managed by the LKKPN (National Marine Protected Area Office) Pekanbaru and includes distinct zones: a 197.34-hectare core zone, a 39,681.1-hectare limited utilization zone, and a 41.56-hectare anchoring and habitat rehabilitation zone. The largest, the limited utilization zone, highlights the importance of managing human interactions within the MPA. This research focuses on identifying and exploring strategies to address challenges faced by LKKPN Pekanbaru in managing the Pieh Island NMPA, specifically using the Bando Island area as a case study. Bando Island, a survival tourism destination within the MPA, needs to be more adequately managed. A literature review and data collection through focus group discussions (FGD) were conducted. Issues were explored and validated using the APKL (Aktual, Problematik, Khalayak, Layak) analysis, with priorities determined by the USG (Urgency, Seriousness, Growth) matrix. Fishbone analysis was used to identify root causes of top-priority issues, and alternative strategies were ranked using the McNamara approach. The research identified the lack of stakeholder collaboration as the primary issue, leading to the development of the "KADO SPESIAL" model—focusing on stakeholder involvement in every phase of the management process.
Revisión Sistemática de la Investigación Científica en Trabajo Social y Salud Mental
Authors: Chaves-Montero Alfonso , Blanco-Miguel Pilar
Published: December 2024

Introducción: El Trabajo Social y la Salud Mental son dos campos interdisciplinarios que trabajan juntos para mejorar el bienestar psicosocial de las personas y las comunidades. En las últimas décadas, ha habido un aumento en el interés en comprender cómo estos dos campos se relacionan y cómo afectan mutuamente el bienestar de las personas. Metodología: Para llevar a cabo esta revisión sistemática utilizando la metodología PRISMA, se realizó un análisis exhaustivo de la producción científica relacionada con el Trabajo Social y la Salud Mental en revistas académicas de impacto. Resultados: La revisión sistemática muestra un mayor reconocimiento de la importancia de abordar los determinantes sociales de la salud en la promoción del bienestar psicosocial y la incorporación de prácticas de Trabajo Social en el campo de la Salud Mental. Discusión:  Se busca en particular identificar las tendencias, métodos y resultados más relevantes en la literatura académica reciente sobre este tema. Conclusiones: Este estudio ofrece una perspectiva completa de la relación entre el Trabajo Social y la Salud Mental y destaca la importancia de utilizar un enfoque interdisciplinario para abordar los problemas en este campo.
Una interpretación bioética de los Murales de Osaka
Authors: Álvarez Díaz Jorge Alberto
Published: December 2024

Introducción: En la historia del arte en México pueden identificarse dos periodos en el Siglo XX: en la primera mitad la Escuela Mexicana de Pintura, y en la segunda mitad la generación de la Ruptura. Una obra colectiva emblemática de la Ruptura es la exposición de Osaka 70. Metodología: Se analiza la labor del artista como una forma peculiar de antropología, particularmente de etnografía. Se plante aun análisis hermenéutico de la obra plástica desde la bioética. Resultados: Los Murales de Osaka son 11 aportaciones de gran formato, con títulos que reflejan problemáticas de la repercusión del desarrollo tecnocientífico de los países más desarrollados sobre los menos desarrollados. 1970 coincide con el nacimiento de un nuevo campo del saber, la bioética, interesada por temas afines a los tratados por estos artistas plásticos.  Discusión: Cada uno de los Murales de Osaka muestra una problemática que la bioética ha analizado en sus inicios, coincidiendo con la Exposición, o en décadas posteriores. Conclusiones: El artista efectivamente puede actuar como un intérprete de la cultura y la obra producida puede tener diferentes interpretaciones, como la que se ha hecho aquí desde la bioética.
Du roman naturaliste au roman à thèse : entre révolution et évolution
Authors: Sayegh Maria
Published: December 2024

Cet article a pour objectif d’analyser la transition du roman naturaliste au roman à thèse et d’examiner par conséquent la transformation du genre romanesque à la fin du XIXe siècle. Nous proposons ainsi d’étudier dans un premier temps les différentes étapes de ce passage ou plutôt de cette « révolution » (combattre l’esprit décadent, admettre la prédominance de la religion, prôner une ouverture plus grande sur l’humanité, porter plus d’intérêt aux problèmes sociaux et moraux de l’époque). Aussi tentons-nous de répondre dans un deuxième temps à la question suivante : la transition du roman naturaliste au roman à thèse n’est-elle pas le signe d’une évolution du roman (émergence d’un discours idéologique et utopique, interpellation du lecteur, ton didactique), et ne reflète-t-elle pas par conséquent la transformation du genre romanesque au tournant du siècle ?
Le motif de la révolte dans le texte de L’Abbé Jules d’Octave Mirbeau
Authors: Élthes Agnès
Published: December 2024

La révolte est un motif clé dans le roman d’Octave Mirbeau, L’Abbé Jules. En suivant le fil du récit et en replaçant les occurrences dans leur contexte narratif, l’article s’intéresse aux répétitions lexicales du mot et à ses dérivations. Les répétitions de ce mot mettent au jour les personnages : leur psychologie, leurs cheminements et leurs interactions. L’étude s’attache tout particulièrement à considérer le rapport entre la révolte et le personnage éponyme, lequel s’inscrit dans un contexte à la fois historique, religieux et culturel. Ainsi le rapport à la religion est-il au cœur d’une révolte significative chez l’abbé Jules, révélant au passage les contradictions qui le caractérise. Loin d’être une simple « ornementation », la révolte, axe de lecture transversal, dévoile des réseaux sémantiques et thématiques. Ces derniers, au-delà de la seule fiction, mettent au jour le regard critique de Mirbeau sur la société qui lui est contemporaine : famille, Église, comportements humains.
Respiritualiser le roman sans âme. Une lecture de La Femme pauvre de Léon Bloy
Authors: Colin Yoann
Published: December 2024

Nous voudrions montrer comment Bloy se révolte contre le roman de son temps en cherchant à respiritualiser un modèle trop matérialiste et positiviste. L’étude de La Femme pauvre met au jour, à l’inverse du roman de son époque, la volonté bloyenne de faire voir les rouages invisibles d’une mécanique divine dont les personnages romanesques ne sont que des ombres projetées et incarnées, et non des fac-simile d’acteurs sociaux obéissant à des lois que l’étude de la société suffirait à déterminer.Ce roman révèle le rôle que Bloy fixe à l’écrivain : être au service de la Parole de Dieu, ce qui tranche avec celui de l’observateur neutre, sorte de Claude Bernard naturaliste. Il souligne aussi la mission que Bloy assigne précisément au genre romanesque, par contraste avec d’autres genres littéraires, comme le pamphlet, qu’il utilise également.
Flora of the Burulginsky Cape vicinities (lower reaches of the Indigirka River, North-East Yakutia)
Authors: Koroleva T. M. , Gogoleva P. A. , Khitun O. V. , Petrovskii V. V. , Troeva E. I. , Chinenko S. V. , Efimov G. N.
Published: December 2024

For the first time, a complete annotated list of vascular plant species is provided and the local flora (LF) “Burulginsky Cape” is analyzed. It is the richest known LF in the lower reaches of the Indigirka River (262 species and subspecies, 109 genera, 41 families), including a number of the species rare in the northern Yakutia and seven species listed in the regional Red Book, as well as taxa endemic to the Arctic ×Trisetokoeleria jurtzevii Probat. and ×T. taimyrica Tzvel. The similarity of the studied flora with LFs from the East Siberian and Chukotka provinces of the Arctic floristic region (lower reaches of the Anabar, Lena, Indigirka, Kolyma Rivers, and Western Chukotka) is discussed; its type is determined as the East Siberian hypoarctic flora, with a predominance of mesophytes in its composition and with a noticeable participation of the species of arid habitats. The territory of the Burulginsky Cape LF with an area of about 200 km2 is recommended to include in the category of specially protected objects as an area of increased diversity of vascular plants.
Reactions of Pyrimidine-2-sulfenyl Chloride with Alkylvinyl and Allyl Ethers
Authors: Ishigeev R. S. , Amosova S. V. , Potapov V. A.
Published: December 2024

The regioselective synthesis of novel thiazolo[3,2-a]pyrimidine derivatives in 52–92% yields was developed based on the reaction of pyrimidine-2-sulfenyl chloride with unsaturated ethers. The reaction with allylic and vinylic ethers proceed regioselectively, but with the opposite regiochemistry. The reaction with allylic ethers lead to 2-substituted thiazolo[3,2-a]pyrimidine derivatives whereas 3-organyloxy derivatives are formed in the reaction with vinylic ethers.
VERBALS IN DEPTH: INFINITIVE AND GERUND
Authors: MAYORSHINA S.V.
Published: December 2024

Учебное пособие содержит краткую теоретическую справку о природе, особенностях и употреблении неличных форм английского глагола, более подробный теоретический материал о формах и синтаксических функциях инфинитива и герундия, а также употреблении инфинитивных и герундиальных комплексов в современном английском языке. После каждого теоретического раздела представлен ряд упражнений разных типов для развития и совершенствования грамматических навыков по темам, указанным выше. Учебное пособие предназначено для студентов географического факультета МПГУ, обучающихся по направлению Педагогическое образование, профили География и Иностранный язык (английский), может быть также использовано на занятиях по практической грамматике в языковых вузах и для самостоятельной работы студентов, изучающих английский язык как специальность.
Tipificación citomorfológica del tumor venéreo transmisible canino y su correlación con la presentación clínica en perros de Yopal-Casanare
Authors:   Universidad Internacional del Tropico Americano, Medina-Lombana Claudia Fernanda , Rubiano-Chávez Juan Camilo ,   Universidad Internacional del Tropico Americano, Lozano-Perez Martha Eliana ,   Universidad Internacional del Tropico Americano, Chavarro-Medina Ana Maria ,   Universidad Internacional del Tropico Americano
Published: December 2024

Las características citomorfológicas del tumor venéreo transmisible canino (TVTC) permiten clasificarlo en los tipos linfocítico, plasmocítico y linfoplasmocítico (mixto). Este estudio se realizó en Yopal, Casanare (Colombia), una ciudad donde la información epidemiológica sobre esta enfermedad es inexistente, aunque su presencia es común en la práctica veterinaria local. Se analizaron muestras citológicas de 50 perros diagnosticados con TVTC, provenientes de 27 centros veterinarios de Yopal, donde se determinó la presentación clínica, de acuerdo con las regiones anatómicas afectadas, siendo estas: genital (80 %), extragenital (14 %) y genital/extragenital (6 %). Se identificaron los subtipos citomorfológicos linfocítico (76 %), mixto (22 %) y plasmocítico (2 %), con el fin de evaluar la relación entre la citomorfología y la presentación clínica de los casos estudiados. Los resultados no mostraron una relación de dependencia entre el subtipo celular y factores, como sexo, raza y edad del paciente. Asimismo, se determinó que la tipificación citomorfológica del TVTC y la presentación clínica son independientes, según la prueba exacta de Fisher. En conclusión, al igual que otros estudios, los hallazgos obtenidos sugieren la necesidad de investigaciones que integren aspectos citomorfológicos, histopatológicos y moleculares, para explorar la relación entre las características citomorfológicas del tumor y su comportamiento clínico
Trends of Ethnomathematics Research in Indonesia: A Bibliometric Analysis from the Scopus Database
Authors: Riadi Arifin , Turmudi Turmudi , Juandi Dadang
Published: December 2024

Penelitian ini bertujuan untuk menganalisis tren publikasi penelitian etnomatematika di Indonesia menggunakan basis data Scopus. Mengingat pentingnya pendidikan yang kontekstual, penelitian ini berupaya untuk memetakan pertumbuhan dan fokus penelitian etnomatematika di Indonesia, yang dapat menjadi panduan untuk studi selanjutnya dan mendorong kontribusi akademik yang lebih luas dan berdampak. Dengan menggunakan analisis bibliometrik, penelitian ini mengidentifikasi tren publikasi tahunan, perbandingan antara artikel jurnal dan prosiding konferensi, lima penerbit paling diminati, lima artikel yang paling banyak dikutip, lima penulis paling produktif, serta jaringan kolaborasi penulis dan identifikasi topik (ko-okurensi) menggunakan VOSviewer. Hasil penelitian menunjukkan bahwa jumlah publikasi etnomatematika di Indonesia meningkat setiap tahun, dengan prosiding konferensi yang mendominasi dibandingkan artikel jurnal. Lima penerbit utama adalah Journal of Physics: Conference Series, AIP Conference Proceedings, Journal on Mathematics Education, International Journal of Scientific and Technology Research, dan Infinity Journal. Penulis paling produktif adalah Herawaty dan Widada, yang sering berkolaborasi. Artikel yang paling banyak dikutip adalah karya Muhtadi et al. Jaringan kolaborasi penulis menunjukkan bahwa Sutama adalah peneliti dengan koneksi terbanyak, sementara analisis ko-okurensi topik menyoroti fokus pada geometri, budaya, ide-ide matematika, pemecahan masalah, dan pendidikan karakter.
This study aims to analyze the publication trends of ethnomathematics research in Indonesia using the Scopus database. Given the increasing recognition of the importance of contextualized education, this study addresses the need to map the growth and focus areas within Indonesian ethnomathematics research, which can guide future studies and encourage broader, more impactful scholarly contributions. Utilizing bibliometric analysis, this study identifies annual publication trends, comparisons between journal articles and conference proceedings, the five most preferred publishers, the five most cited articles, the five most productive authors, as well as co-authorship and topic identification (co-occurrence) networks using VOSviewer. The results show that the number of ethnomathematics publications in Indonesia has increased year by year, with conference proceedings dominating over journal articles. The top five publishers are Journal of Physics: Conference Series, AIP Conference Proceedings, Journal on Mathematics Education, International Journal of Scientific and Technology Research, and Infinity Journal. The most productive authors are Herawaty and Widada, who frequently collaborate. The most cited article is by Muhtadi et al. The co-authorship network shows that Sutama is the most connected researcher, while the topic co-occurrence analysis highlights a focus on geometry, culture, mathematical ideas, problem-solving, and character education.
Articulate Storyline Media-Based Discovery Learning to Improve Students' Mathematical Concept Understanding Ability of Flat-Sided 3D Space
Authors: Laila  Fitriana  , Mukti Putri Sari , Setiawan Rubono
Published: December 2024

Penelitian ini bertujuan untuk mengembangkan dan menilai apakah media pembelajaran berbasis discovery learning berbantuan Articulate Storyline valid, praktis, dan efektif dalam meningkatkan pemahaman konsep matematika siswa terkait materi bangun ruang sisi datar. Penelitian ini merupakan jenis penelitian pengembangan (R&D) yang mengikuti langkah-langkah model pengembangan ADDIE. Subjek penelitian adalah siswa kelas VIII D di SMP Negeri 23 Purworejo. Metode pengumpulan data yang digunakan adalah observasi, wawancara, kuesioner, dan tes. Analisis data menggunakan perhitungan persentase untuk analisis kevalidan dan kepraktisan, serta uji N-Gain dan Wilcoxon Sign berdasarkan hasil pre-test dan post-test untuk menilai keefektifan produk. Hasil uji validitas menunjukkan skor rata-rata 78,33% dari ahli materi dan 80,43% dari ahli media; hasil uji praktikalitas menunjukkan skor rata-rata 84,75% dari penilaian siswa dan 80,56% dari penilaian guru; dan hasil uji tanda Wilcoxon menunjukkan bahwa skor post-test lebih tinggi dari skor pre-test, dengan rata-rata N-Gain 0,44, yang termasuk dalam kategori peningkatan sedang. Kesimpulannya, media pembelajaran yang dikembangkan valid, praktis, dan efektif dalam meningkatkan pemahaman konsep matematika siswa terkait materi bangun ruang sisi datar.
This study aimed to develop and assess whether the discovery learning-based learning media, supported by Articulate Storyline, is valid, practical, and effective in improving students' understanding of mathematical concepts related to flat-sided space buildings. This research is a type of development study (R&D) that follows the ADDIE development model steps. The research subjects were students of class VIII D at SMP Negeri 23 Purworejo. Data collection methods included observation, interviews, questionnaires, and tests. Data analysis involved percentage calculations for validity and practicality analysis, as well as N-Gain and Wilcoxon Sign tests based on pre-test and post-test results to assess the effectiveness of the product. The validity test results showed an average score of 78.33% from material experts and 80.43% from media experts; The practicality test results showed an average score of 84.75% from student assessments and 80.56% from teacher assessments; and The Wilcoxon sign test results indicated that the post-test score was higher than the pre-test score, with an average N-Gain of 0.44, which falls under the moderate improvement category. In conclusion, the developed learning media is valid, practical, and effective in improving students' understanding of mathematical concepts related to flat-sided space buildings.
Mathematics Teachers' Perceptions Towards Geometry Teaching Methods in Relation to Technological Transformations
Authors: Rustam  , Bistari  , Novianti Metia
Published: December 2024

Penelitian ini bertujuan untuk mendeskripsikan persepsi guru matematika terhadap konsep geometri serta pembelajarannya dengan transformasi teknologi pada SMP Kalimantan Barat. Tantangan integrasi teknologi dalam pengajaran geometri masih sering dihadapi guru, terutama dalam konteks pengajaran yang membutuhkan visualisasi dan pemahaman spasial yang mendalam. Metode penelitian yang digunakan adalah penelitian kualitatif dengan pendekatan deskriptif. Pengumpulan data dilakukan dengan membagikan tes melalui pada 127 guru, sementara analisis data dilakukan secara deskriptif kualitatif. Hasil penelitian menunjukkan persepsi guru matematika terhadap konsep geometri dikaitkan dengan transformasi teknologi pada jenjang SMP Kalimantan Barat. Terdapat kecenderungan bahwa konsep geometri diajarkan cukup dengan keterampilan guru apa adanya, tidak begitu melibatkan IT, dengan persepsi bahwa IT lebih memerlukan waktu dan usaha yang gigih. Selain itu, terdapat kecenderungan melakukan pembelajaran alami, di mana pembelajaran dilakukan sebatas pemahaman siswa tanpa upaya untuk memastikan bahwa materi geometri sesuai dengan kebutuhan kontekstual. Dalam hal ini, IT tidak begitu diaplikasikan dalam pembelajaran.
This research aims to describe mathematics teachers' perceptions of geometry concepts and their learning with technological transformation in West Kalimantan junior high schools. The challenge of technology integration in teaching geometry is often faced by teachers, especially in contexts requiring visualization and deep spatial understanding. The research method used is qualitative with a descriptive approach. Data collection was done by distributing tests to 127 teachers, while data analysis was done qualitatively. The results showed teachers’ perceptions of geometry and technological transformation at the junior high school level in West Kalimantan. There is a tendency that geometry is taught with the teachers’ existing skills, without involving IT, due to the perception that IT requires more time and effort. Additionally, learning tends to focus on student understanding without ensuring the geometry material aligns with contextual needs, resulting in minimal application of IT in learning.
Learning Obstacle of Integral Course Learning Based on APOS Theory Perspective
Authors: Nurhayati Lina , Gunawan Iwan
Published: December 2024

Penelitian ini bertujuan untuk mengetahui learning obstacle mahasiswa calon guru dalam pembelajaran integral tentu. Pentingnya integral dalam meningkatkan mutu pendidikan menuntut pemahaman yang lebih mendalam dari para guru agar materi ini dapat diajarkan secara efektif. Penelitian ini merupakan penelitian kualitatif dengan studi kasus yang difokuskan pada 10 mahasiswa calon guru Matematika di Universitas swasta di bandung, Indonesia, yang dipilih secara purposive sampling. Mahasiswa diberikan soal TKR (tes kemampuan responden) sebagai tes kemampuan awal dalam pemahaman konsep integral tentu. Selanjutnya, menggunakan analisis APOS (Aksi, proses, objek dan skema) melalui wawancara In-depth interview diperoleh indikasi learning obstacle dari mahasiswa. Hasil yang diperoleh, siswa mengalami hambatan belajar didaktis, hambatan belajar ontogenik konseptual khususnya materi aljabar sebagai prasyarat pembelajaran integral yang belum dipahami dengan baik dan psikologi dimana siswa mengalami hambatan belajar karena kurangnya rasa percaya diri dalam menyelesaikan masalah perhitungan integral tentu. Learning obstacle yang ditemukan dapat dijadikan dasar dalam membuat desain pembelajaran yang epistemic.
This research aims to determine the learning obstacles of prospective teacher students in integral learning of course. The importance of integrals in improving educational quality requires teachers to have a deeper understanding of this topic to teach it effectively. This research is a qualitative research with a case study focused on 10 prospective Mathematics teacher students at a private university in Bandung, Indonesia, who were selected using purposive sampling. Students are given TKR (respondent ability test) questions as an initial ability test in understanding integral concepts of course. Furthermore, using APOS analysis (Action, process, object and scheme) through in-depth interviews, indications of learning obstacles were obtained from students. The results obtained showed that students experienced didactic learning obstacles, conceptual ontogenic learning obstacles, especially algebraic material as a prerequisite for integral learning that has not been well understood, and psychology where students experienced learning obstacles due to a lack of self-confidence in solving definite integral calculation problems. The learning obstacles found can be used as a basis for creating epistemic learning designs
Determining Auspicious Days for Weddings and Circumcisions in Kuta Traditional Village
Authors: Prabawati Mega Nur , Mulyani Eva , Muslim Siska Ryane
Published: December 2024

Penelitian ini menyelidiki filosofi dan aktivitas matematika yang tertanam dalam menentukan hari baik untuk upacara pernikahan dan khitanan di Desa Adat Kuta. Dengan menggunakan metode penelitian kualitatif dengan pendekatan etnografi, pengumpulan data dilakukan melalui observasi, wawancara, dan dokumentasi terhadap tokoh adat, tetua adat, dan anggota masyarakat. Temuan ini mengungkapkan enam aktivitas matematika mendasar yang selaras dengan nilai-nilai budaya lokal: penghitungan (digunakan untuk menghitung kesesuaian dan menentukan hari baik), penempatan (untuk mengidentifikasi tanggal terlarang dan posisi spasial), pengukuran (untuk mengurutkan hari dan menyelaraskan waktu), perancangan (untuk mengatur tanggal dan waktu menurut adat istiadat), bermain (mengamati aturan dan menafsirkan hasil), dan menjelaskan (memberikan interpretasi perhitungan yang bermakna). Studi ini menunjukkan bahwa praktik etnomatematika ini tidak hanya mendukung tradisi lokal tetapi juga memperkuat identitas budaya dan warisan masyarakat Kuta. Integrasi konsep matematika seperti penjumlahan, pembagian, modulo aritmatika, dan barisan aritmatika dalam kebiasaan ini mengungkapkan hubungan rumit antara matematika dan praktik budaya, menawarkan perspektif unik untuk pendidikan matematika yang responsif terhadap budaya.
This study investigates the philosophy and mathematical activities embedded in determining auspicious days for marriage and circumcision ceremonies in Kuta Traditional Village. Employing qualitative research methods with an ethnographic approach, data were gathered through observations, interviews, and documentation from traditional leaders, elders, and community members. The findings reveal six fundamental mathematical activities that align with local cultural values: counting (used in calculating compatibility and determining favorable days), locating (for identifying restricted dates and spatial positions), measuring (for sequencing days and aligning timings), designing (for organizing dates and times according to customs), playing (observing rules and interpreting outcomes), and explaining (providing meaningful interpretations of calculations). This study demonstrates that these ethnomathematical practices not only support local traditions but also reinforce the cultural identity and heritage of the Kuta community. The integration of mathematical concepts such as addition, division, modulo arithmetic, and arithmetic sequences within these customs reveals the intricate relationship between mathematics and cultural practices, offering a unique perspective for culturally responsive mathematics education.
 
Keyword: Ethnomathematic; philosophy; mathematical activities; goodday of marriage and circumcision.
Improving Students' Metacognition Skills through Mathematics Learning Based on Realistic Mathematics Education
Authors: Noviyanti Ika Nurma , Riyadi Riyadi , Indriati Diari
Published: December 2024

Metakognisi sangat penting namun dalam realitanya belum sesuai dengan yang diharapkan. Tujuan penelitian ini untuk menghasilkan modul pembelajaran yang valid, praktis, dan efektif serta untuk mengetahui metakognisi siswa pada materi Aljabar menggunakan modul matematika berbasis Realistic Mathematics Education (RME) yang telah dikembangkan. Penelitian ini menggunakan metode penelitian R&D (Research and Development). Partisipan pada penelitian ini adalah 2 kelas pada sekolah menengah pertama (SMP) dimana masing-masing kelas akan menjadi kelas eksperimen dan kelas kontrol. Subjek yang digunakan pada kelas eksperimen sebanyak 31 orang dan subjek pada kelas kontrol sebanyak 32 orang. Penelitian pengembangan pada penelitian ini menggunakan model Four-D (4D) yang memiliki empat tahapan meliputi pendefinisian, perancangan, pengembangan, dan penyebaran. Hasil penelitian ini menunjukkan bahwa modul matematika yang dikembangkan valid, praktis, dan efektif serta siswa yang menggunakan modul matematika berbasis RME mempunyai metakognisi lebih baik daripada siswa yang menggunakan buku teks matematika yang disediakan oleh sekolah. Temuan dari penelitian ini dapat dijadikan landasan dalam merancang bahan ajar yang relevan.
Metacognition is very important, but in reality, it is not in accordance with expectations. The purpose of this research is to produce valid, practical, and effective learning modules and to determine students' metacognition in Algebra material using the Realistic Mathematics Education (RME)-based mathematics module that has been developed. This research uses the R&D (Research and Development) research method. Participants in this study are 2 classes in junior high school (SMP) where each class will be an experimental class and a control class. The subjects used in the experimental class were 31 people and the subjects in the control class were 32 people. The development research in this study uses the Four-D (4D) model which has four stages including definition, design, development, and deployment. The results of this study show that the mathematics modules developed are valid, practical, and effective and students who use RME-based mathematics modules have better metacognition than students who use mathematics textbooks provided by schools. The findings of this study can be used as a basis for designing relevant teaching materials.
Yapay Zekâ Teknolojileri Kullanımının Ön Lisans Öğrencilerinin Dijital Okuryazarlık Düzeylerine Etkisi
Authors: Turkaya Abdulkerim , Benli Özdemir Esra
Published: December 2024

Bu araştırmada, ön lisans düzeyinde öğrenim gören öğrencilerin yapay zekâ teknolojileri kullanımının dijital okuryazarlık düzeyleri üzerine etkisi incelenmiştir. Araştırmanın çalışma grubu, 2023-2024 eğitim-öğretim yılı güz yarıyılında Ankara Müzik ve Güzel Sanatlar Üniversitesi Müzik ve Güzel Sanatlar Meslek Yüksekokulu Radyo ve Televizyon Programcılığı Programı (n=13) ile Geleneksel El Sanatları Programında (n=7) ikinci sınıf düzeyinde öğrenimine devam eden toplam 20 öğrenciden oluşmaktadır. Katılımcılara, öğrenim gördükleri programların öğretim programlarında yer alan “Bilgisayar Destekli Tasarım” dersi içeriğinde altı hafta boyunca “Yapay Zekâ Teknolojileri Kullanımı” eğitimi verilmiştir. Araştırma, nicel ve nitel yaklaşımların birlikte kullanıldığı karma araştırma yöntemiyle yürütülmüştür. Verilerin elde edilmesinde; nicel boyutta “Demografik Özellik Anketi” ve “Dijital Okuryazarlık Ölçeği” öntest ve sontest olarak uygulanması sonucu elde edilmiş, nitel boyutta ise, araştırmacılar tarafından hazırlanan “Yarı-Yapılandırılmış Görüşme Formu” kullanılarak elde edilmiştir. Araştırma sonucunda; nicel verilerin analizinde elde edilen sonuçlara göre, katılımcılara verilen altı haftalık eğitim ile bireylerin yapay zekâ teknoloji kullanımlarının dijital okuryazarlık düzeylerine olumlu ve yüksek düzeyde etkiye sahip olduğu görülmüştür. Nitel verilerin analizinde elde edilen sonuçlara göre ise, uygulama sonrasında yapılan görüşmelerde, öğrencilerin yapay zekâ teknolojileri kullanımının; tasarımlarını oluşturmada bilgisayar desteği kullanarak deneyim kazanmaları, pratiklik sağlaması ve teknolojik yetkinliğe sahip olmaları açısından fayda sağladığı ortaya çıkmıştır. Bu anlamda bilgi ve teknoloji çağında yaşadığımız göz önünü alındığında, ön lisans düzeyinde öğrenim gören öğrencilere yönelik öğretim teknolojileri kullanma yeterliliklerini arttıracakları yapay zekâ teknolojileri eğitimlerine daha çok yer verilmesi önerilmiştir.
Uygulamalı Bilimlerde Yenilikçilik Davranışı: Mimarlık Öğrencilerinin “Yeni” ile Olan İlişkilerinin Sorgulanması
Authors: Beyaztaş Halit , Tekin Çiğdem , Oğuz C. Zeynep
Published: December 2024

Türkiye mimari üretim ortamında yenilenme, yeniden inşa etme davranışının yoğunluğu da dikkate alınarak mimarlık öğrencilerinin; hızlı ve yeni çözüm üretebilen, yeniye uyum sağlayabilen ve risk alarak uygulama yapabilen davranışlara sahip olmaları gerekmektedir. Bu amaçla çalışma kapsamında Mimarlık Bölümü birinci sınıf birinci dönem öğrencilerinin yeni ile olan ilişkisi belirlenmeye çalışılmıştır. Öğrencilerin henüz hiç mimarlık eğitimi almamış olması, bireysel özelliklerinin belirlenebilmesi için önemlidir. Bu nedenle mimarlık eğitimine yeni başlamış olan birinci sınıf birinci dönem öğrencileri ile çalışılmıştır. Bu çalışma iki ayrı yönteme dayalı bir araştırma desenine sahiptir. Biri nicel araştırma yöntemlerinden tarama (anket) ve diğeri nitel analiz yöntemi ile birebir görüşme, veri toplama (maket ve rapor teslimi) tekniği ile yapılmıştır. Anket modelinde; bireysel yenilikçilik ölçeği anketi kullanılmıştır. Uygulamada; teknolojiden hızlı beslenen yapı malzemesi dersi kapsamında; dersi destekleyecek, öğrencinin problem çözme davranışını ve yeniye olan ilgisini belirleyebilecek içerikte oluşturulmuştur. Yenilikçilik anketi sonuçları öğrencilerin; “sorgulayıcı” bir kimlikte olduğunu ortaya koymuştur. Öğrencilerin uygulamada malzeme önerme davranışları da anket sonuçlarını destekleyecek niteliktedir. Yeni ile olan ilişkileri/davranışları “sorgulayıcı” olarak bulunan öğrencilerin, uygulama çalışmalarında da önce anlama, ikna olma, alışma ve güvenli alandan çıkma ile daha özgün fikirler önerebildikleri gözlenmiştir. Çalışmanın sonuçları, Türkiye’de farklı meslek adayları için yapılan yenilikçilik ölçeği araştırmaları ile karşılaştırıldığında, sonuçların ağırlıklı olarak “sorgulayıcı” olduğu ve bu çalışma ile uyumlu olduğu belirlenmiştir. 21. yüzyıl becerilerinde ön plana çıkan “yenilikçi bireyler”e sahip bir toplum için, sadece mimarlık meslek alanı eğitiminde değil üst ölçekte eğitim ve yüksek öğretim reformunu gerektirmektedir.
Asymptotic behaviour for the heat equation with weak convection and absorption
Authors: Claudi S. , Guarguaglini F.R.
Published: December 2024

We study the large time behaviour of nonnegative solutions of the Cauchy problem [Formula: see text] where $m\Egeq 2$ , $p>1$ and $u_0 \in L^1({\EBbbR})$ .

We prove that in this range for $m$ the diffusion term prevails over the convection one, thus obtaining the asymptotic profile of the solution in $L^q({\EBbbR})$ ( $1\Eleq q\Eleq +\infty$ ).
Homogenization of the Vlasov equation and of the Vlasov–Poisson system with a strong external magnetic field
Authors: Frénod Emmanuel , Sonnendrücker Eric
Published: December 2024

Motivated by the difficulty arising in the numerical simulation of the movement of charged particles in presence of a large external magnetic field, which adds an additional time scale and thus imposes to use a much smaller time step, we perform in this paper a homogenization of the Vlasov equation and the Vlasov–Poisson system which yield approximate equations describing the mean behavior of the particles. The convergence proof is based on the two‐scale convergence tools introduced by N’Guetseng and Allaire. We also consider the case where, in addition to the magnetic field, a large external electric field orthogonal to the magnetic field and of the same magnitude is applied.
Justification of the Marguerre–von Kármán equations in curvilinear coordinates
Authors: Andreoiu‐Banica Georgiana
Published: December 2024

We apply the method of asymptotic expansions with the thickness as the small parameter to the three‐dimensional shallow shell problem of Marguerre–von Kármán written in curvilinear coordinates, with the displacement as the unknown. We prove that the leading term of the asymptotic expansion can be identified with the solution of a two‐dimensional problem. We also establish the existence and regularity of solutions to this two‐dimensional problem.
Stochastic homogenization of Hamilton–Jacobi equations and some applications
Authors: Souganidis Panagiotis E.
Published: December 2024

Homogenization‐type results for the Cauchy problem for first‐order PDE (Hamilton–Jacobi equations) are presented. The main assumption is that the Hamiltonian is superlinear and convex with respect to the gradient and stationary and ergodic with respect to the spatial variable. Some of applications to related problems as well as to the asymptotics of reaction–diffusion equations and turbulent combustion are also presented.
Incompressible hydrodynamic limits for a kinetic model of waves–particles interaction
Authors: Saint‐Raymond Laure
Published: December 2024

The macroscopic dynamics of a kinetic equation involving a model wave–particle collision operator of plasma physics (see Degond and Peyrard, C. R. Acad. Sci. Paris 323, 1996) is investigated. Using relative entropy estimates about an absolute Maxwellian, it is shown, as in Bardos, Golse and Levermore (Comm. Pure Appl. Math. 46(5), 1993), that any properly scaled sequence of solutions has fluctuations that converge to a limiting density of the form $g=U(x,t).v +P_0 g(x,t)({\vert v\vert ^2/2})$ with fluid variables that satisfy the incompressibility and Boussinesq relations. For a convenient scaling of the initial fluctuations, the momentum densities globaly converge to a solution of the Stokes equation. Using an infinite number of entropies, we derive the diffusion equation for the energy distribution function of the particles. A similar discrete time version of this result holds for the Navier–Stokes equation coupled with a diffusion equation for the energy distribution function under an additional mild weak compactness assumption.
Mathematical study of multi‐phase flow under shear through order parameter formulation
Authors: Boyer Franck
Published: December 2024

In this paper we study the coupling of the Navier–Stokes equations and the Cahn–Hilliard equation which stands for a model of a multi‐phase fluid under shear. We first study existence and uniqueness of solutions of the system in dimension $2$ and $3$ even if the diffusion coefficient is allowed to degenerate. In the last part, an asymptotic stability result is shown.
Uniform attractors for a strongly damped wave equation with linear memory
Authors: Borini Silvia , Pata Vittorino
Published: December 2024

A strongly damped semilinear wave equation with linear memory is considered in a history space setting. Namely, the evolution of the past history of the displacement vector is contained in the dynamical system. Existence, uniqueness and continuous dependence results are discussed. Under proper assumptions on the memory kernel, the existence of uniform absorbing sets is achieved. Moreover, when the source term is translation compact in a suitable functional space, the system is shown to possess a uniform attractor.
On bases of eigenfunctions of boundary problem associated with small vibrations of damped nonsmooth inhomogeneous string
Authors: Gomilko Alexander , Pivovarchik Vyacheslav
Published: December 2024

The initial–boundary problem is considered for a nonsmooth inhomogeneous string with the left end fixed and the right one equipped with a massive ring moving with damping in the direction orthogonal to the length of the string. The asymptotic behaviour of the eigenvalues of the corresponding boundary problem is investigated. The eigenvectors of the problem are those of a dissipative operator acting in the Hilbert space $H=\hat{W}_2^1[0,l]\oplus L_2[0,l]\oplus\mathbb{C},$ where $\hat{W}_2^1[0,l]$ is the subspace of functions in Sobolev space $W_2^1[0,l],$ which vanish at the origin. It is proved that the set of the normalized rootvectors of this operator is a Riesz basis in $H.$ Under certain conditions the initial–boundary problem admits a unique solution.