bluuebunny/crossref_metadata_2025 huggingface dataset:
Revisión sistemática de la integración y la relación entre el pensamiento computacional y las matemáticas en los primeros años escolares
Authors: Ocampo Lina Marcela , Corrales Álvarez Milena , Cardona Torres Sergio Augusto
Published: July 2024

El pensamiento computacional surge como un área de conocimiento debido a que la tecnología y la informática se han vuelto cada vez más importantes en la sociedad actual. Se ha demostrado que el pensamiento computacional puede mejorar a la resolución de problemas, utiliza técnicas de la ciencia de la computación para desarrollar soluciones a problemas complejos, y a menudo implica la aplicación de principios matemáticos, como el álgebra, la geometría y la estadística. Por otro lado, las matemáticas son fundamentales para el pensamiento computacional, ya que proporcionan la base teórica y conceptual para muchas técnicas de las ciencias de la computación. Los conceptos matemáticos, como las funciones, los conjuntos y la teoría de grafos, son esenciales para la comprensión de muchos algoritmos y estructuras de datos. El objetivo de este trabajo fue analizar la manera en que se han integrado las matemáticas y el pensamiento computacional, y cómo se ha medido esa relación al utilizar actividades conectadas  y desconectadas en estudiantes de los primeros años de escolaridad. Se revisaron 302 artículos a los cuales se les aplicaron criterios de inclusión y exclusión asociados a las variables de interés del estudio. Al finalizar la revisión se encuentra que en la mayoría de los artículos se integran las matemáticas y el pensamiento computacional tomando como base la relación que guardan entre sí, y se utilizan estrategias en el aula que favorecen ambos campos del conocimiento; en once de los artículos se proponen actividades desde cuatro componentes matemáticos (geométrico, métrico, espacial y numérico) para abordar el pensamiento computacional, siendo el componente geométrico el más utilizado; solo siete artículos incluyen en su población de estudio el grado 0º y sólo dos artículos trabajan con población de países de Centro (Panamá) y Sur América (Uruguay); lo que podría indicar que el pensamiento computacional está en una etapa naciente en nuestro continente, excluyendo a los países de Norte América donde se reportan un mayor número de artículos.
Análisis de resultados del desafío internacional Bebras Colombia 2022
Authors: Suaza Jorge , Hurtado Castaño Catalina , González Pérez María Eugenia
Published: July 2024

El International Challenge on Informatics and Computational Thinking Bebras es una herramienta que se utiliza en Colombia para medir las habilidades de los estudiantes en Pensamiento Computacional, y es una oportunidad para reflexionar sobre cómo mejorar las prácticas educativas utilizando nuevas herramientas y tecnología. La educación en ciencias e ingeniería se enfoca en aprender y desarrollar habilidades mediante la asimilación de contenido, sin embargo, para preparar a los estudiantes para el mundo actual, es importante estimular el pensamiento crítico y computacional.
Bebras Colombia contó con la participación de 2751 y 5191 estudiantes entre 8 y 21 años en los años 2021 y 2022 respectivamente. Los resultados mostraron que hay pilares fáciles y difíciles por categoría, y se identificaron las correlaciones más fuertes entre pares de pilares. También se encontraron diferencias significativas por género y tipo de institución educativa.
La implementación del Bebras en Colombia es una iniciativa que fomenta el desarrollo de habilidades en Pensamiento Computacional, lo que es fundamental para enfrentar los retos del mundo actual y futuro. Además, es importante que la educación se adapte a las nuevas tecnologías y herramientas para preparar a los estudiantes para las exigencias del mercado laboral y de la sociedad en general.
Promoviendo la motivación del aprendizaje por medio del pensamiento computacional
Authors: Figueroa Mo Karina Mariela , Ortiz Herrera Ángel L.
Published: July 2024

Existen materias que están consideradas con un alto grado de dificultad en los estudiantes de nivel básico y medio superior, usualmente son las matemáticas y la física. Ambas se han convertido en un reto en todo el planeta pues las demandas pedagógicas cada vez son mayores y más complejas en la sociedad actual. Desde siempre es normal que se priorice la parte teórica pues mejora la capacidad de generalizar y razonar los nuevos conocimientos, sin embargo, difícilmente contribuye al pensamiento deductivo y crítico. Aunado a esto, en la actualidad los jóvenes tienen poco interés por materias teóricas, su actitud es pasiva, lo cual no contribuye a que quieran participar.
Para promover un cambio de actitud en los jóvenes de la sección 31 de 4o semestre de la Preparatoria Ing. Pascual Ortiz Rubio de la Universidad Michoacana de San Nicolás de Hidalgo, México, se diseñó y se llevó a cabo un taller de pensamiento computacional (PC). El objetivo fue generar motivación y estimulación del aprendizaje. Se sabe que el PC estimula la capacidad de resolver problemas con una metodología propia que incluye: creatividad, abstracción, razonamiento y pensamiento crítico entre otros. Para este primer taller se contó con la participación de 17 jóvenes cuyo desempeño fue mejorando a lo largo de la actividad y, posteriormente fueron reduciendo el tiempo y consiguieron deducciones, y automatizaciones acordes a lo planeado. Al finalizar, los jóvenes mostraron estar muy contentos, motivados y conociendo el poder de un pensamiento deductivo y crítico. En este punto, se considera que el taller cumplió su objetivo.
La enseñanza del pensamiento computacional y sus efectos sobre las funciones ejecutivas de los niños
Authors: Robledo Castro Carolina , Rodríguez Rodríguez Luz Helena , Castillo Ossa Luis Fernando
Published: July 2024

La enseñanza del pensamiento computacional en la educación K-12, ha ganado un notorio protagonismo en los últimos años. El objetivo principal de estas iniciativas no es enseñar a programar desde la niñez, si no, fortalecer la capacidad de razonamiento, resolución de problemas y el desarrollo de los procesos cognitivos. Es por este motivo, que estudiar los efectos e impactos cognitivos que la enseñanza del pensamiento computacional tiene en los estudiantes, se ha convertido en un campo de acción con múltiples retos. Buscando aportar a este nuevo campo de estudio, esta prueba piloto evaluó el efecto de un programa de entrenamiento en pensamiento computacional sobre las funciones ejecutivas de niños en edad escolar. Los resultados mostraron que la intervención en pensamiento computacional condujo a mejoras en algunas tareas asociadas a las funciones ejecutivas de inhibición, memoria de trabajo visoespacial y planificación.
Propiedades ópticas de nanopartículas de óxidos metálicos: Estudio de NP de CuO y mediante MnO2 UV-Vis
Authors: Suarez Jimenez Brandon , Londoño Zuluaga Dorian Camilo , Riascos Landazuri Henry
Published: July 2024

En los últimos años, se ha despertado interés en la comunidad científica por estudiar nanopartículas (NPs) y explorar la amplia diversidad de aplicaciones que tienen, incluso como una alternativa a los materiales utilizados convencionalmente. Un paso clave en el estudio de las nanopartículas es el análisis de sus propiedades ópticas, ya que estas revelan información sobre su estabilidad, pureza e interacciones con radiación UV-vis, y ayudan a confirmar la identidad de la naturaleza de las nanopartículas. En este proyecto, se sintetizaron y estudiaron muestras de nanopartículas de óxido de cobre y manganeso con el objetivo de comprender puntos clave en el comportamiento de estas partículas. Los picos observados en los espectros UV-Vis permitieron confirmar la identidad de las nanopartículas producidas, con resultados que mostraron una alta estabilidad para las nanopartículas de CuO sintetizadas en agua y metanol; se encontró que las nanopartículas de MnO2 eran inestables en agua debido a la aglomeración de las partículas. El análisis de los picos de resonancia de plasmones superficiales mostró la presencia de reacciones de oxidación durante el proceso de ablación. Se estimaron valores de la brecha de banda de 5,44 eV y 3,77 eV para las nanopartículas de CuO y MnO2, respectivamente, lo que descarta cualquier posible aplicación de estas nanopartículas como materiales semiconductores. Las nanopartículas de CuO tienen potencial aplicación como material antibacteriano debido a su alta estabilidad en agua y la citotoxicidad natural del cobre.
Implementación de un modelo predictive basado en redes neuronales convolucionales 3D en el paso de deterioro cognitivo leve a Alzheimer sobre imágenes por resonancia magnética
Authors: Castaño Maria Camila , Arias Garcia Jonnatan , Serna Serna Walter , Orozco Gutierrez Alvaro Angel , Cardenas Peña David Augusto
Published: July 2024

La enfermedad del Alzheimer es un trastorno neurológico que causa la pérdida de autonomía y memoria en las personas que la padecen. Debido al aumento de casos de este padecimiento y la falta de precisión de las herramientas de diagnóstico se da paso al desarrollo de nuevas herramientas capaces de disminuir esta problemática. El objetivo principal de este trabajo investigativo es implementar un modelo de red neuronal convolucional tridimensional con estructura base tipo AlexNet3D para obtener la predicción de un posible diagnóstico de la enfermedad Alzheimer (AD) a partir del análisis de imágenes por resonancia magnética, utilizando como etapa temprana el síndrome de deterioro cognitivo leve (MCI). Este proyecto brindará la explicación de cada fase planteada, las cuales fueron dividas en selección de las bases de datos, elección de características, procesamiento de los datos, desarrollo del modelo para su entrenamiento y validación, y por último, resultados obtenidos a partir de las pruebas de predicción. Con las cuales pudo obtenerse un porcentaje del 72,222 %, permitiendo catalogar al modelo K-Net95 como una red estable y eficiente, a pesar de las limitaciones computacionales a las que se vio limitado el proyecto.
SISTEM INFORMASI MONITORING PERSEDIAAN BAHAN KUE KERING
Authors: Ningrum Dila Ayu Tri Suhesti , Firliana Rina , Nugroho Arie
Published: July 2024

Penelitian ini bertujuan untuk mengembangkan sistem informasi monitoring persediaan bahan di toko Simar Cookies. Sistem ini dirancang untuk mengotomatisasi proses pengecekan stok, pencatatan pergerakan persediaan dan pembuatan laporan. Metode pengembangan sistem yang digunakan adalah Business Process Modeling Notation (BPMN) untuk memodelkan proses bisnis serta pendekatan pengembangan perangkat lunak waterfall. Hasil implementasi menunjukkan peningkatan keakuratan data persediaan, efisiensi operasional dan kemudahan dalam pengambilan keputusan berbasis data real – time. Pengujian sistem menunjukkan bahwa sistem ini memfasilitasi pengelolaan persediaan dengan lebih baik dan mendukung efisiensi operasional serta pertumbuhan bisnis.
Deep Learning Algorithm for Face Recognition Using a Hybrid Model
Authors:   University of Anbar, Adil Nafea Ahmed , Salah Ibrahim Mohammed ,   University of Anbar, M AL-Ani Mohammed ,   Universiti Kebangsaan Malaysia (UKM), O. Hama Zainab ,   Sulaimani University
Published: July 2024

This study presents a robust hybrid model for face recognition, which synergistically integrates the VGG16 convolutional neural network (CNN) for feature extraction with an autoencoder for dimensionality reduction and representation learning. This paper proposed VGG16 and Autoencoder architecture efficiently extracts high-level features from images, much reducing computational complexity while the classify of the extracted features used Support Vector Machine (SVM). The proposed hybrid model has achieved a high accuracy of 98% in face recognition tasks on benchmark datasets. This high accuracy highlights efficiency of combination VGG16-based feature extraction with autoencoder of a dimensionality reduction technique and SVM classification in advancing the state-of-the-art in face recognition approaches.
PELATIHAN PENYUSUNAN PROGRAM LATIHAN OLAHRAGA UNTUK KETAHANAN MENTAL SISWA DI SD HKBP PARDAMEAN
Authors: Munthe Paul , Sembiring Pedro , Sibarani Boy , Saragih Gilbert , Simanjuntak Gabriel
Published: July 2024

Penelitian ini bertujuan untuk mendeskripsikan peran pendidikan jasmani pada kesehatan mental, olahraga, dan kesehatan dalam kelas 5A SD HKBP Pardamean. Penelitian ini menggunakan metode kualitatif deskriptif dengan teknik pengumpulan data observasi, wawancara, dan dokumentasi. Hasil penelitian menunjukkan bahwa pembelajaran pendidikan jasmani, olahraga, dan kesehatan (PJOK) di kelas 5A SD HKBP Pardamean telah dilaksanakan dengan baik dan memberikan dampak positif bagi kesehatan mental, olahraga, dan kesehatan siswa. Hal ini terlihat dari antusiasme siswa dalam mengikuti pembelajaran PJOK, peningkatan kemampuan motorik dan kebugaran jasmani siswa, serta berkurangnya stres dan kecemasan pada siswa.
PENGARUH DISKON DAN WORD OF MOUTH TERHADAP KEPUTUSAN PEMBELIAN KONSUMEN PENGGUNAAN APLIKASI GOJEK PADA MASYARAKAT KECAMATAN MEDAN HELVETIA KOTA MEDAN
Authors: Aprialsyah Fachriza , Purnama Nadia Ika
Published: July 2024

Tujuan penelitian ini adalah untuk mengetahui dan menganalisis Pengaruh Diskon Dan Word Of Mouth Terhadap Keputusan Pembelian Konsumen GoFood pada Masyarakat Kecamatan Medan Helvetia Kota Medan, baik itu secara parsial maupun secara simultan. Adapun penelitian ini menggunakan pendekatan kuantitatif dengan teknik analisis linear berganda. Adapun hasil penelitian menunjukkan ada pengaruh yang signifikan Diskon terhadap Keputusan Pembelian Konsumen GoFood. Ada pengaruh yang signifikan word of mouth terhadap Keputusan Pembelian Konsumen GoFood. Ada pengaruh yang signifikan antara  Diskon dan Word of Mouth terhadap Keputusan Pembelian Konsumen GoFood di Kecamatan Helvetia Kota Medan. Hasil perhitungan regresi dapat diketahui bahwa koefisien determinasi (R square) yang diperoleh sebesar 28,2, hasil ini memiliki arti bahwa 28,2% variabel Keputusan Pembelian dapat dijelaskan oleh variabel Diskon dan Word of Mouth  sedangkan sisanya sebesar 71,3% diterangkan oleh variabel lain yang tidak diteliti.
Fact check: Still not core journalism curriculum
Authors: Wake Alexandra Nicole , Gordon Farrer , Thomas Sonny
Published: July 2024

Fact-checking has become a global industry, with more than 417 fact-checking outlets in 100 countries operating in 69 languages (Stencel, Ryan & Luther, 2023). According to the Duke Reporters’ Lab, half of the world’s fact checkers are associated with media outlets, but there are also 24 affiliated with academic institutions. Although the work is time consuming and resource intensive, fact-checking has increasingly been introduced to journalism programmes at universities and in professional settings. This expert article brings together some insights from a United Nations Educational, Scientific and Cultural Organisation (UNESCO) World Journalism Education Council (WJEC) roundtable event ‘Fact-Check and Verification as Core Journalism Curriculum’ hosted by RMIT University in Australia in 2021, alongside relevant literature exploring the nature and presence of fact-check based education approaches at that time. It concludes that while fact-checking and verification are important skills for student journalists, fact checkers do not necessarily need to be journalists, nor indeed have journalistic training. However, more students are needed who are excellent journalists and the authors argue that fact-checking is just part of that training.
Challenges for campus and community media in Asia-Pacific diversity
Authors: Robie David , Seneviratne Kalinga , Singh Shailendra
Published: July 2024

The ‘watchdog’ model has created a journalism culture that is too adversarial and creates conflicts rather than helping to solve today’s problems/conflicts. The panellists assess new journalism paradigms in the Asia-Pacific region where the media is able to make powerful players to account for facilitating the development needs of communities, especially those in the margins of society. A challenge for contemporary journalism schools is to address such models in a global context of ‘development rights’ with the UN’s Sustainable Development Goals as a benchmark. In the Pacific Islands context, journalists face a challenging news reporting terrain on their news beats, especially in the Melanesian countries of Fiji, Papua New Guinea, Solomon Islands and Vanuatu. Besides dealing with political instability, coups, civilian unrest and complex developmental issues, journalists must contend with hostile governments and draconian media legislation. The talents, idealism and storytelling skills of Pacific journalists can be cultivated and strengthened to produce independent platforms and models of journalism that challenge the status quo. Examples of this campus strategy include Radio Pasifik, Wansolwara, Pacific Scoop and Asia Pacific Report.
Media plurality, independence and Talanoa: An alternative Pacific journalism education model
Authors: Robie David
Published: July 2024

The shrinking mainstream media plurality in Aotearoa New Zealand provides a context for examining publication of campus-based media where student and faculty editorial staff have successfully established an independent Asia-Pacific digital and print press over the past two decades. New Zealand’s largest city Tāmaki Makaurau (Auckland) has the largest urban population of Pacific Islanders globally—more than 300,000 people in a total of 1.7 million (Pasifika New Zealand, n.d.), earning the moniker ‘Polynesian capital of the world’. The presenter has had a pioneering role with four university-based journalism publications in the Pacific region as key adviser/publisher in Papua New Guinea (Uni Tavur, 1993-1998); Fiji (Wansolwara, 1998-2002); and Aotearoa/New Zealand (Pacific Scoop, 2009-2015; Asia Pacific Report, 2016 onwards), and also with two journalism school-based publications in Australia (Reportage, 1996, and The Junction, 2018-2020) (Robie, 2018). In early 2021, he was co-founder of the Asia Pacific Media Network | Te Koakoa Incorporated which has emerged as a collective umbrella for academics, student journalists and independent reporters producing innovative publications, including the research journal Pacific Journalism Review and a strengthened Asia Pacific Report, which draw on a cross-disciplinary range of media contributors and scholars in other professions. These contributors are mindful of the challenges of reportage about the UN Sustainable Development Goals (SDGs). This article explores an independent journalism model drawing on professional outlets for Asia-Pacific students and how an investigative and storytelling model like ‘Talanoa Journalism’ can be an effective bridge to alternative media careers and addressing ‘blind spots’ in legacy news media.
OBITUARY: Arnold Clemens Ap: His West Papuan legacy lives on
Authors: Maclellan Nic
Published: July 2024

Arnold Clemens Ap was born on 1 July 1946 on Numfor Island in Biak, at the time, part of the Dutch colony of Netherlands New Guinea. After schooling at church missions in Biak, he studied geography at the Teacher Training School of Cenderawasih University in Abepura, Jayapura, between 1967 and 1973. That year, he was appointed as the curator of the university’s museum, known as Loka Budaya, which became a centre for West Papuan cultural revival. His work to collect and perform songs in Papuan languages played a vital role in the development of a West Papuan national identity, transcending colonial boundaries and inter-tribal conflicts. He was murdered by Indonesian special forces in 1984. This year, 26 April 2024,  marked the 40th anniversary of the death of this charismatic cultural leader. For West Papuans, in exile and at home, it has been an important time for commemoration.
Analisis Pengaruh Draft Blower terhadap Kestabilan Temperature di Ruang Bakar Mesin Smelter guna Memaksimalkan Hasil Produksi di PT YNX
Authors: Saputra Muhammad Daris , Sumarjo Jojo , Sena Boni
Published: July 2024

PT YNX, perusahaan yang mengkhususkan diri dalam produksi Frit, bahan baku untuk kaca dan keramik. Proses produksinya melibatkan beberapa tahap sebelum produk akhir dijual. Dimulai dari penimbangan bahan baku, pencampuran sesuai formula, proses smelter dengan suhu maksimal 1650°C, pendinginan, hingga proses bagging. Selama pemurnian bahan baku, alat pendukung seperti blower digunakan untuk mengalirkan fluida gas melalui pipa dengan tekanan tertentu. Fan, blower, dan kompressor berperan penting dalam menggerakkan udara dan mengatur tekanan sistem. Hasil optimal dicapai pada suhu 1541°C dan 1310°C dengan rear gas dan oksigen yang masuk sesuai proporsi.
Rancang Bangun Alat Pengukur Kadar Glukosa Darah Non-Invasif Berbabis ESP 8266 Terintegrasi Thingspeak dan Apsensi Biometrik
Authors: Pionis Pankrasius , Nur’aidha Amalia Cemara , Sugianto Wahyu
Published: July 2024

Diabetes Melitus adalah penyakit kronis yang prevalensinya terus meningkat. Saat ini, metode invasif dan non-invasif digunakan untuk mengukur kadar glukosa dalam darah. Metode invasif melibatkan pengambilan sampel darah yang merusak jaringan kulit, sementara metode non-invasif tidak merusak jaringan kulit. Keduanya belum memiliki database pasien yang terintegrasi. Oleh karena itu, dikembangkanlah alat pengukur kadar glukosa darah non-invasif beserta database pasien, menggunakan mikrokontroler NodeMCU ESP8266, modul sensor fotodioda, LCD I2C, situs web ThingSpeak, Wemos D1 Mini, modul sensor sidik jari, OLED I2C, dan situs web absensi biometrik. Tujuannya adalah untuk memantau kadar glukosa darah serta data pasien secara efektif. Hasil penelitian menunjukkan bahwa pengukuran kadar glukosa darah dapat dipantau melalui ThingSpeak dan data pasien dapat diinput ke aplikasi absensi biometrik. Dalam perbandingan dengan alat glukometer Easy Touch GCU, alat glukometer non-invasif yang dikembangkan memiliki persentase error tertinggi sebesar 3.23% dan terendah sebesar 1.55%.
Whether Children Aged 10-12 React to FOP Nutri-Score Labels on the Children’s Snack Packaging During the Period of Purchase in China
Authors:   College of Creative Arts, Universiti Teknologi MARA, Perak Branch, Seri Iskandar Campus, 32610 Seri Iskandar, Perak, Malaysia, Junjie Guo , Ibrahim Nur Hisham ,   College of Creative Arts, Universiti Teknologi MARA, Perak Branch, Seri Iskandar Campus, 32610 Seri Iskandar, Perak, Malaysia, Ab Gani Muhamad Abdul Aziz ,   College of Creative Arts, Universiti Teknologi MARA, Perak Branch, Seri Iskandar Campus, 32610 Seri Iskandar, Perak, Malaysia
Published: July 2024

Numerous studies have found that there are many visual design elements on children's food packaging that influence children's tasty, including color, shape, font, size, material, and brand. In recent years, more and more research has found that the role of labeling in food packaging cannot be ignored and is increasingly influencing purchasing behavior to some degree. In addition, there is a gradual upward trend regarding labeling for the improvement of healthy dietary intake of children. This study aims to analyze whether front of packaging (FOP) nutrition labeling on children's snack packaging has a positive effect on the purchasing behavior in China.
Exploring the Impact of Emotion on Future Sustainable Development Education ：Leveraging Virtual Reality Technology
Authors:   College of Creative Arts, Universiti Teknologi MARA, Malaysia., Zhongyao Yi , Ramlie Mohd Khairulnizam ,   College of Creative Arts, Universiti Teknologi MARA, Malaysia, Subri Shafilla ,   College of Creative Arts, Universiti Teknologi MARA, Malaysia
Published: July 2024

The 2015 United Nations Millennium Declaration identified 17 sustainable development goals (SDGs) and 169 sub-goals. Sustainability has always been an area of great concern. The main purpose of this study is to explore the role of emotion in promoting the innovation of education for sustainable development in the future through virtual reality technology. The main target group of this study is to promote the United Nations Sustainable Development Goal 13 climate change to people in developed regions. The main medium of communication is virtual reality animation video and game interaction, which is convenient for more users to access through online platforms. Participants can work together online to create sustainable animation and game projects. The 3D animation of virtual reality adopts more realistic modeling, lighting rendering, and material rendering. Issues such as deforestation and ocean acidification can be better visualized. People in developed regions may understand sustainable development but they do not have a deep understanding of the importance of the problem. Therefore, this research is dedicated to making people have a true emotional identity through virtual reality technology, and ultimately transforming people's values, behaviors and lifestyles towards sustainable development.
Impact of plant-based nanoparticles synthesized from Carica papaya and Bryophyllum pinnatum against selected microorganisms
Authors: Igiebor Francis Aibuedefe ,   Department of Biological Sciences, College of Science and Computing, Wellspring University, Benin City, Nigeria. Email: francis.igiebor@lifesci.uniben.edu., Michael Favour Chinaza , Haruna Ochoyama , Ikhajiagbe Beckley ,   Department of Biological Sciences, College of Science and Computing, Wellspring University, Benin City, Nigeria. Corresponding author: francis.igiebor@lifesci.uniben.edu.,   Department of Science Laboratory Technology, Faculty of Life Sciences, University of Benin, Benin City, Nigeria. Corresponding author: francis.igiebor@lifesci.uniben.edu.,   Department of Plant Biology and Biotechnology, Faculty of Life Sciences, University of Benin, Benin City, Nigeria. Corresponding author: francis.igiebor@lifesci.uniben.edu.
Published: July 2024

Plant-based nanoparticles offer sustainable, eco-friendly alternatives to conventional methods, promising antibacterial properties in the face of antibiotic resistance and addressing global health concerns. Five urine and stool samples were collected from the Benin Medical Centre in Benin City, Edo State, and sent to the Wellspring University Research Laboratory for microbiological analysis. Carica papaya and Bryophyllum pinnatum were used for fresh utilization by washing, weighing, and crushing their leaves, then mixing them with distilled water and heating at 85 °C and 60 °C for 60 minutes. Silver and copper nanoparticles (AgNPs and CuNPs) were synthesized using standard procedures. The NPs were preliminary validated by visual detection of color changes and characterized using a UV-visible spectrophotometer at 300 nm and Fourier transform infrared. The in vitro antimicrobial activity of plant-mediated NPs was investigated using five isolates: S. aureus, B. alvei, H. pylori, P. aeruginosa, and E. coli. The in vitro antimicrobial activity of plant-mediated NPs was investigated using five clinical strains displaying multiple resistance to antibiotics: S. aureus,
B. alvei, H. pylori, P. aeruginosa, and E. coli. The agar-well diffusion method showed inhibition of the isolates by plant-mediated NPs but no inhibition by the plant extract alone. The study indicates that plant-mediated NPs exhibit promising antimicrobial activity, promoting sustainability and eco-friendliness, but further research is needed to assess their safety and efficacy in clinical settings.
Keywords: nanoparticles, resistant, antimicrobial, plant-mediated, MAR index.
Les tractations et les paix des historiens : une lecture de sept chroniques catalanes, aragonaises et siciliennes (XIIIe-XIVe siècles)
Authors: Péquignot Stéphane
Published: July 2024

A partir de siete crónicas escritas en Sicilia y en la Corona de Aragón entre finales del siglo XIII y el segundo tercio del siglo XIV, este artículo examina cómo los cronistas incluyen la labor diplomática, las negociaciones y los actos conducentes a la paz en sus relatos del conflicto que siguió a las Vísperas sicilianas. Los intercambios diplomáticos eran una faceta de un conflicto más amplio, a veces lo amplificaban; su puesta en práctica era una prueba de fuego para unos protagonistas que deseaban la paz pero dudaban al mismo tiempo de la sinceridad de su enemigo. Aunque la paz parecía a menudo imposible, había dos vías principales para salir del ciclo del conflicto: la gracia divina, que proporcionaba una buena paz, y los acuerdos basados en concesiones mutuas y en la misericordia.
Fondé sur sept chroniques composées en Sicile et dans la couronne d'Aragon entre la fin du XIIIe siècle et le deuxième tiers du XIVe siècle, l'article étudie comment les chroniqueurs font place dans leur récit du conflit consécutif aux Vêpres siciliennes au travail diplomatique, aux négociations et aux actes menant vers la paix. Les échanges diplomatiques constituent une facette d'un conflit plus large, ils l'amplifient parfois ; leur réalisation est une épreuve de vérité pour des protagonistes désireux de paix et doutant de la sincérité de l'ennemi. Si la paix paraît souvent impossible, deux voies principales pour sortir du cycle des conflits apparaissent : la grâce divine, dispensatrice d'une bonne paix ; la convention basée sur des concessions mutuelles et la miséricorde.
Democratic Respect. Populism, Resentment, and the Struggle for Recognition
Authors: Flores Díaz Jorge Gerardo
Published: July 2024

En los últimos años, el populismo ha ganado millones de adeptos alrededor del mundo. En numerosos países, los líderes y partidos populistas ocupan un espacio importante en los órganos de representación e, incluso, en algunos casos han encabezado o encabezan el gobierno. Lo anterior ha fomentado la reflexión y el debate académico en torno a este fenómeno, y es posible encontrar tanto argumentos a favor como en contra del populismo y su impacto en la democracia.
En este panorama, Christian F. Rostbøll ofrece, en Democratic Respect. Populism, Resentment, and the Struggle for Recognition, un análisis sobre el significado del populismo, las razones que llevan a la gente a apoyar a este tipo de líderes y partidos, y la validez de sus demandas en el contexto democrático.
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Power to the Public: The Promise of Public Interest Technology
Authors: Bermúdez Cruz Luis Enrique
Published: July 2024

El libro inicia afirmando que “el mundo está en llamas” (p. 8). Si esta aseveración es colocada en el contexto de la pandemia y la crisis económica global de los últimos tres años, entonces pasa por cierta. La escritura de McGuiness y Schank avanza en la argumentación de que, dadas las condiciones coyunturales, se necesita una nueva generación de resolución de los problemas públicos. Así, las autoras afirman, con la misma claridad expositiva de la primera sentencia, que “no es posible resolver los problemas más difíciles del mundo sin un gobierno” (p. 10).
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La diacronía de la preposición compuesta de a en el español americano
Authors: Hummel Martin , Wissner Inka
Published: July 2024

El español hablado en América suele usar los adverbiales que combinan las dos preposiciones de y a según el tipo equivocarse de a feo. El análisis diacrónico de los corpus CDH y CORDIAM no permite identificar el origen de este tipo de adverbiales, ya que se trata de un fenómeno que surgió durante el siglo xix como reflejo del habla oral ya establecida. La técnica de la reconstrucción diacrónica a partir de la variación observable en las lenguas románicas conduce a un hecho de diacronía “lateral”: la coincidenciadel uso americano con el de la lengua rumana. Ello admite afirmar que hubo una diacronía oral que se remonta al latín hablado.
Agitational and Propagandistic Measures to Activate Cossack Volunteer Movement in Don Region during Great Patriotic War
Authors: Bondarev V. A.
Published: July 2024

This study addresses the enhancement of agitational and propagandistic measures to activate Cossack volunteerism in the Don region during the Great Patriotic War. Various sources, including archival and published documents, periodicals, testimonies, and contemporaries’ memoirs, were utilized. A comparative-historical analysis of agitational and propagandistic activities conducted in the Don region from 1941 to 1945 indicates significant changes in Soviet approaches and methods of agitation during wartime. Initially, internationalism and socio-political motives (class-based approach) dominated Soviet propaganda at the war’s outset, akin to the pre-war period, leading to the primary involvement of communists, Komsomol members, and Civil War veterans in the Cossack volunteer movement. However, pre-war propaganda approaches quickly lost their effectiveness. By autumn 1941, national-patriotic motives took precedence in Soviet agitation and propaganda efforts. In the Don region, these changes manifested in propaganda appealing to the illustrious combat history of the Don Cossacks and exalting regional patriotism. It is demonstrated that adjusting agitational and propagandistic measures towards strengthening national-patriotic motives proved highly effective, ensuring a steady influx of volunteers into Cossack cavalry formations.
Social Support Organization in Russian Empire During World War I: Financial Aspects
Authors: Bukalova S. V.
Published: July 2024

This study examines the interplay between state and public involvement in financing social support for the affected population during World War I (1914-1918). The research focuses on the income components of the budgets of the Supreme Council for the Care of Families of Enlisted Persons and the Moscow Committee of Grand Duchess Elizabeth Feodorovna for providing charitable assistance to families of enlisted individuals. Quantitative data on charitable donations and government subsidies serve as sources. The total amount of collected charitable donations is disclosed for the first time, with a conclusion drawn regarding their stable dynamics. It is demonstrated that the volume of charitable donations was incomparable to the need for assistance. Despite measures to stimulate donation inflow (such as lotteries and rewards for donors), charitable contributions could not establish a reliable financial foundation for the social support system. The author concludes on the increasing significance of state funding. The institutionalization of social assistance required formalization and regulation of support measures, recipient tracking, and the establishment of uniform organizational structures, among others. Thus, the pre-revolutionary period of World War I marks an important stage in the genesis of state social policy.
Status of Germans in Russian Empire during First World War (1914-1917)
Authors: Erokhina O. V.
Published: July 2024

This article focuses on characterizing the everyday life, moods, and situation of Germans residing in the territory of the Russian state from 1914 to 1917. The author analyzed letters written by representatives of different social groups, nationalities, and ages during this period, as well as materials from periodical publications. Special attention is given to significant events for the German population, such as the renaming of settlements from German to Russian names, the development and application of “liquidation legislation” towards them in 1914-1915, and the interactions in the army between German and Russian military personnel. Based on the materials studied, it is concluded that Germans had mixed perceptions of the socio-political events in the country. Some sought to blend in with the crowd and not emphasize their national identity, while others tried to draw the attention of State Duma deputies to their issues. They did not understand how to prove their loyalty to the authorities and why they were labeled as “internal enemies”, despite being Russian subjects. The most dissatisfaction was expressed by soldiers who fought as well as Russians, received deserved military awards, but were subjected to humiliations by their superiors.
Pavel Rennenkampf: Unnoticed Decembrist Conspirator
Authors: Ilyin P. V.
Published: July 2024

This article addresses the misidentification of Colonel Pavel Rennenkampf, a member of the Southern Decembrist conspiracy and a colonel in the General Staff (1790-1857), by historians. Through the examination of investigative materials, police reports, official correspondence, and memoirs, the author aims to establish the documentary evidence supporting Pavel Rennenkampf’s involvement in the Decembrist movement. It is concluded that this officer played a significant role in S.I. Muravyov-Apostol’s plans for organizing the uprising of the Chernigov Regiment, dedicated to the secrecy of the military conspiracy and its political goals. The research novelty lies in shedding light on an understudied figure in Decembrist history, previously overlooked by historiography. The relevance of this study lies in its contribution to understanding key events in the Decembrist movement — the Southern conspiracy and uprising. The article discusses why the incriminating evidence indicating P.Ya. Rennenkampf's involvement in clandestine societies was dis-regarded during historical proceedings and remained largely unnoticed by historians. The author provides an explanation for the long-standing misattribution of K.P. Rennenkampf instead of P.Ya. Rennenkampf in historical accounts.
Impacto de la Danza en el Bienestar Emocional: una Revisión Sistemática
Authors: Roca-Amat Andrea , García-Alandete Joaquín
Published: July 2024

La danza es una actividad física que se caracteriza por el movimiento del cuerpo mediante secuencias y ritmos, generalmente acompañada de estilos musicales variados y, por su naturaleza, se relaciona con beneficios psicológicos, porque se considera un medio de expresión emocional. En el presente trabajo se llevó a cabo una revisión sistemática de la literatura científica publicada en el período 2014-2023, sobre el impacto de la práctica de la danza en el bienestar. Los resultados mostraron que la práctica de la danza tiene beneficios en el bienestar en diferentes poblaciones y culturas, con efectos duraderos a corto, medio y largo plazo. La danza puede ser un recurso terapéutico útil para el tratamiento de diferentes trastornos mentales.
Effect of drying temperature on the bioactive compounds content of rose hips (Rosa canina L.)
Authors: Gruszecki Robert , Mysiak Barbara , Walasek-Janusz Magdalena
Published: July 2024

Dog rose (Rosa canina L.) is a beautiful ornamental plant that provides fruit with high biological value. To be available throughout the year, rose hips need to be conserved, such as dried and canned. For this reason, a study was undertaken to investigate the effects of drying as the most common method for preservation. Therefore, the influence of variation drying temperature (20, 35 and 68 °C) on the content of flavonoids, total polyphenols, ascorbic acid, carotenoids and antioxidant activity - determined using the free radical source DPPH (2,2-diphenyl-1-picrylhydrazyl) and a test measuring the measuring of compounds to reduce ferric ions Fe3+ (FRAP) - of rose hips was the main topic in this study. Drying decreased total polyphenols (from 38.06 mg g–1 by fresh fruits to 9.41 mg g–1 drying to 20 °C), ascorbic acid (from 2000.5 mg 100 g–1 by fresh fruits to 1308.2 mg 100 g–1 drying to 68 °C) and flavonoids, the latter only in those dried at 35 °C (0.54 mg g–1), but did not affect the antioxidant activity of DPPH (84.21–85.73%) and FRAP (2.99–3.41 mgTr g–1). The study also showed that the extraction time influenced the antioxidant activity level of fruit infusions for the first time. The antioxidant potential FRAP value increased systematically with extraction time, but the DPPH values of extracts obtained from dried rose hips were not affected by the extraction time. These results indicate that changes in the antioxidant activity of extracts may not be linear and that the choice of the time of evaluation of this activity may determine the results.
The effect of zinc oxide nanoparticles on the growth and development of Stevia plants cultured in vitro
Authors: Krzepiłko Anna , Prażak Roman , Matyszczuk Katarzyna , Dyduch-Siemińska Magdalena
Published: July 2024

Stevia (Stevia rebaudiana Bertoni) is an essential herbal plant used as a sweetener. The demand for stevia is growing due to its low caloric and medicinal value, hence the need for a more thorough investigation of its nutritional and biological properties. Nanoparticles of metal oxides have been found to have broad applications in agriculture for the stimulation of plant growth and development. The study aimed to assess the effect of various zinc oxide nanoparticles (ZnONPs) concentrations on stevia plants’ quantitative and qualitative traits obtained in in vitro cultures. Micropropagation of two stevia varieties, Candy and Morita, was carried out using explants of shoot tips placed on MS medium supplemented with 1.0 mg dm–3 BA and 0.1 mg dm–3 IBA and with ZnONPs at concentrations of 0 (control), 10, 20, 30 and 40 mg dm–3. The obtained results indicated that high concentrations of ZnONPs stimulated the propagation of shoots. On the other hand, they negatively influenced shoot length, root number and length, and the fresh weight of the plantlets. The presence of zinc oxide nanoparticles in the medium increased the potassium, calcium, magnesium, and zinc content while decreasing the sodium and iron content in the regenerated stevia plantlets. The total phenolic content in the Candy variety was higher in the treatments with ZnONPs than in the control plants, while it was varied in the Morita variety. In both varieties, total antioxidant content measured by the ABTS method showed significantly higher in the treatments with 20–30 mg dm–3 ZnONPs than in the control. The content of chlorophyll a, chlorophyll b and chlorophyll a + b in the Morita variety was higher in the treatments with 10 and 20 mg dm–3 ZnONPs than in the control. On the other hand, high concentrations of ZnONPs negatively affected the content of carotenoids in both varieties. The study showed that stevia plants obtained in in vitro cultures on control media and media containing ZnONPs had a high content of valuable minerals, phytocompounds with antioxidant properties, and photosynthetic pigments.
Uncertainty Evaluation of the TGA Oxidation Data
Authors: Kang Kweonho , Hong Seokmin , Lee Changhwa
Published: July 2024

Thermogravimetric analysis (TGA) involves the measurement of the changes in mass that occur when a constant heat is applied to an unknown specimen as a function of time or temperature. It is used to evaluate thermal stability, oxidative stability, composition, and estimated lifetime, among other parameters. Given that accurate TGA data is important information for lifetime and stability evaluation of parts and products, an uncertainty evaluation procedure is required to ensure the reliability of the data. In this study, the uncertainty evaluation procedure was established according to the Guide to the Expression of Uncertainty in Measurement (GUM). The mathematically expression of the relationship between the measurand and the input quantities, evaluation of the standard uncertainty of each input estimate, determination of the combined standard uncertainty, and calculation of the expanded uncertainty were performed. The biggest factor affecting the uncertainty of TGA data is the uncertainty of correction factor caused by system calibration
Development of NdYO3 Powder Fabrication as a Reaction Preventing Raw Material for Metal Fuel Casting
Authors: Park Sang-Gyu , Kim Ki-Hwan , Kim Jun Hwan
Published: July 2024

Metal fuel is a promising candidate for the pyro-processed nuclear fuel, but the problem of loss of nuclear material due to the high reactivity of metal fuel and melting crucible in the metal fuel casting process must be solved for loss control and waste reduction. In this study, fabrication test was conducted to develop a new material NdYO3 as a new crucible material to improve the degree of anti-reactivity. The NdYO3 compact was manufactured by the CIP (Cold isostatic pressing) method with changing fraction of Nd2O3 and Y2O3 powders. Sintering process was performed at 1550°C for 10 hours. The systematic trends of XRD patterns shows that phase transformations form cubic structure to monoclinic structures occurred with the addition of Y2O3. The rate of pore were discussed with change of fraction of Nd2O3 and Y2O3.
Effects of Oxygen Partial Pressure and slag Basicity on the Behavioral Characteristics of Ni in Slag Drying Smelting
Authors: Lim Jong-Deok , Kim Hyun-Jong , Wang Jei-Pil
Published: July 2024

This study was intended to investigate the effects of basicity and oxygen partial pressure on the distribution behavior of Ni in the nickel smelting process using nickel oxide ore, the raw material of nickel, among natural ores. Experiments were conducted in a vertical tube furnace using Fe-Ni metal and FeO-MgO-SiO2 ternary slag, which simulated the composition of natural ore. An equilibrium experiment was conducted to observe the distribution ratio of Ni, and thermodynamic data required for this experiment was calculated through Factsage. As a result, it was found that as the oxygen partial pressure increased, the Ni content in the slag increased linearly. The Ni content in the slag increased as the basicity moved away from 0.60.
The Role of Overflow on the Mechanical Propert ies of 3D Printed PLA
Authors: Axinte M. , Chicet D.L. , Chelariu R. , Comăneci R.I.
Published: July 2024

3D printing is a technology used on an ever-increasing scale, which makes it easier to obtain parts with complex geometry. The printing process is very complex because, in addition to the variables introduced by the various materials that are used, there is a multitude of process parameters: printing direction, layer thickness, infill level, filament feed rate, printing temperature, printing bed temperature, etc. Each process parameter influences the mechanical properties of the 3D-printed structure, which is why it is necessary to define the range of possible values where the effect is maximum. In this paper it was studied the effect of process parameters variation on the roughness and mechanical properties of the 3D-printed samples. Using a commercially PLA filament (produced by Prussia), we made six sets of 3D-printed samples, using six different overflow (OF) values: 90%, 95%, 100%, 105%, 110%, 115%. The test samples (realized according to ISO 572-2) were subjected to tensile tests on an Instron 3382 machine, and the results were interpreted comparatively. It has been observed that there are variations of the mechanical properties, dependent on the chosen values of the overflow and, in addition, this process parameter has an important role for the achieving the desired structure.
Effect of Heat Treatment Temperature on Isothermal Oxidation of Ni-based Fe-33Ni-19Cr Alloy
Authors: Zaiton N.A.Z. , Parimin N. , Hayazi N.F , Zainal F.F. , Garus S. , Vizureanu P.
Published: July 2024

This project studies the influence of different grain sizes of Ni-based Fe-33Ni-19Cr alloy obtained from heat treatment procedure on high temperature isothermal oxidation. Heat treatment procedure was carried out at two different temperatures, namely 1000℃ and 1200℃ for 3 hours of soaking time, followed by quenching in the water. These samples are denoted as T1000 and T1200. The heat-treated Ni-based Fe-33Ni-19Cr alloy was subjected to an isothermal oxidation test at 950℃ for 150 hours exposure. Oxidized heat-treated alloys were tested in terms of oxidation kinetics, phase analysis and surface morphology of oxidized samples. Oxidation kinetics were determine based on weight change per surface area as a function of exposure time. Phase analysis was determined using the x-ray diffraction (XRD) technique and surface morphology of oxidized samples was characterized using a scanning electron microscope (SEM). As a result, the heat treatment procedure shows varying grain sizes. The higher the heat treatment temperature, shows an increase in grain size with a decrease in hardness value. The oxidation kinetics for both heat-treated samples showed an increment pattern of weight change and followed a parabolic rate law. The oxidized T1000 sample recorded the lowest parabolic rate constant of 3.12×10–8 mg2cm–4s–1, indicating a low oxidation rate, thus having good oxidation resistance. Phase analysis from the XRD technique recorded several oxide phases consisting of Cr2O3, MnCr2O4, and (Ti0.97Cr0.03)O2 oxide phases. In addition, a uniform oxide layer is formed on the oxidized T1000 sample, indicating good oxide scale adhesion, thereby improving the protective oxide behavior.