bluuebunny/crossref_metadata_2025_split huggingface dataset:
INFLUENCE OF CARBONISED RICE HUSK FILLER ON CHANGES IN DEFORMATION AND STRENGTH PROPERTIES OF POLYETHYLENE DURING THERMAL AGEING
Authors: Alikulov A.Zh. , Vernigorov K.B. , Nechipurenko S.V. , Yermukhambetova B.B. , Bushkov V.V. , Irmukhametova G.S. , Stoyanov O.V. , Kazakov Y.M. , Efremov S.A. 
Published: January 2025

The influence of a new filler of natural origin on the thermal oxidation process of high-pressure polyethylene has been studied. The studied filler is carbonized rice husk, a waste product of agricultural production. It has been established that CSF exhibits some thermostabilising effect, preventing the decrease of deformation and strength characteristics of the polymer after its exposure for 3 hours at 170ºC. The introduction of CSF allows to keep the yield strength at the level of 77% (10% wt. CSF) and 46% (5% wt. CSF), while for unfilled aged LDPE this index does not exceed 3% of the initial sample. The breaking stress of the filled samples remains at the level of the unoxidized ones. A synergetic effect was revealed when the investigated filler and standard antioxidant Irganox 1010 were used. At the introduction of 10% wt. of CSF and 0,2% wt. of phenolic stabilizer, there is no decrease in destructive stress after the thermal aging of the material.
Infinitely many sign-changing solutions for an asymptotically linear and nonlocal schrodinger equation
Authors: Qiu Ruowen , You Renqing , Zhao Fukun 
Published: January 2025

In this article, we consider the nonlocal schrodinger equation $$ -\mathcal{L}_K u+V(x)u=f(x,u),\quad x\in\mathbb{R}^N, $$ where \(-\mathcal{L}_K\) is an integro-differential operator and \(V\) is coercive at infinity, and \(f(x,u)\) is asymptotically linear for \(u\) at infinity. Combining minimax method and invariant set of descending flow, we prove that the problem possesses infinitely many sign-changing solutions.
For more information see https://ejde.math.txstate.edu/Volumes/2025/07/abstr.html
Impact of Problem based Learning on Critical Thinking of students in the subject of Science at Elementary Level
Authors: Fayyaz Ahmad  , Dr. Muhammad Aqeel Raza  , Najam Abbas  , Asif Ali  
Published: January 2025

This study was designed to assess the impact of problem based learning on students’ critical thinking in science at elementary level. Major objectives of the study were to examine critical thinking’s of the students, to practice problem based learning through activities, and to evaluate critical thinking of the students after problem based activities. The study population was encompassed all students of 8th grade (20172) within District Muzaffar Garh. Sample consisted of total 50 students from within the same district. Twenty five students out of 40 were selected from Government Boys Elementary School Arshad Abad by using simple random technique as experimental group. Twenty five students out of 27 were selected from Government Boys Elementary Khara by using simple random technique as control group. The designs of study were pretest-posttest and Quasi experimental in nature. Problem based learning treatment pattern was applied. During 16-week treatment duration, the experimental group and the control group were treated with problem-based learning and taught through traditional lecture-based methods respectively. Data was collected from the control and experiment groups before and after four month problem-based learning through pre-test and posttest. After data collection, analysis of the data collected done through descriptive statistics by using mean, median, mode and standard deviation (SD) and inferential statistics by using t-test. Paired sample t-test was applied to measure significance difference value between the means of experimental and control group. T-test value is greater between experimental group and control groups in pretest than the significance value that shows there is significance statistical difference between experimental group and control group performances in pretest. Performance of experimental group is better. Value of T-test is greater between experimental and control groups in posttest than the significance value shows there is significance statistical difference in experimental and control groups performances in posttest. Experimental group performance is better. The experimental group performed better as compared to performance of control group in both pretest and posttest. But the difference in means of pretest of experimental and control group is very small than difference in means of posttest of experimental group and control groups. It depicts through problem based learning students’ critical thinking is highly improved.
Kesiapan Guru Sosiologi Mengimplementasikan Kurikulum Merdeka
Authors: Wahyulianingsih Sri , ST Ramlah  , Datuk Amirulah , ARIFIN Arifin 
Published: January 2025

Kurikulum merupakan suatu yang dinamis, oleh karenanya guru dituntut untuk menyesuaikan diri terhadap perubahan sistem pembelajaran. Banyak keluhan dari para penyelenggara pendidikan utamanya guru bahwa perubahan kurikulum menuntut mereka lebih banyak belajar, namun terdapat sebagian guru yang tidak mampu melakukan hal tersebut. Penelitian ini bertujuan mengetahui kesiapan guru sosiologi dalam mengimplementasikan kurikulum merdeka di MAN Kota Kupang; dan mendeskripsikan mengatahui faktor penghambat guru sosiologi dalam mengimplementasikan kurikulum merdeka di MAN Kota Kupang. Penelitian ini merupakan penelitian kualitatif deskriptif yaitu menjelaskan suatu gejala, kondisi, atau keadaan. Sehingga peneliti dapat memperoleh gambaran yang luas dan mendalam tentang fenomena-fenomena dan kenyataan-kenyataan yang ada pada subjek. Teknik pengumpulan data menggunakan observasi partisipan, wawancara mendalam, dan telaah dokumen. Sumber data data utama adalah guru sosiologi, kepala madrasah, dan wakil kepala madrasah bidang kurikulum. Penilitian dianalisis menggunakan analisis interaktif menurut Miles dan Huberman.
Hasil penelitian ini menunjukkan beberapa temuan. Pertama, guru sosiologi MAN kota kupang telah siap dalam mengimplementasikan kurikulum merdeka yang dilihat dari 4 indikator kesiapan yakni 1) kesiapan kognitif, guru telah memahami kurikulum merdeka, mampu menyusun modul ajar dan penilaian serta menjalankan pembelajaran sesuai dengan karakteristik kurikulum merdeka, 2) kesiapan fisik, guru sosiologi memiliki riwayat kesehatan yang baik sehingga tidak menganggu kinerja guru, 3) kesiapan psikologis, guru sosiologi memiliki minat dan motivasi dalam mengimplementasikan kurikulum merdeka, 4) kesiapan finansial, madrasah telah memiliki sarana dan prasarana yang lengkap dalam pengimplementasian kurikulum merdeka. Kedua terdapat beberapa faktor penghambat dalam pengimplementasian kurikulum merdeka diantaranya yakni 1) guru sosiologi merasa sedikit kesulitan dalam modul ajar karena awal pembelajaran harus ada tes diagnostik, kriteria ketuntasan minimal ditiadakan sehingga guru merasa kesulitan terhadap patokan keberhasilan siswa, 2) dalam penilaian pembelajaran terdapat dua raport yaitu penilaian akademik dan raport penilaian projek, hal ini membuat guru harus menambah waktu yang panjang, dan 3) terdapat guru-guru yang masih sedikit bingung dan khawatir dalam menyusun kegiatan projek yang sesuai dengan karakteristik peserta didik.
COMPARATIVE WOOD ANATOMICAL PROPERTIES OF GENUS SYZYGIUM (FAMILY MYRTACEAE) FROM MANIPUR, INDIA
Authors: Wangkhem Mahesh , Sharma Madhubala , Sharma Chaman Lal 
Published: January 2025

Syzygium belongs to family Myrtaceae and comprises of mostly trees and a few shrubs. The main objectives were to study anatomical and physical characteristics of five Syzygium species namely Syzygium cumini, Syzygium fruticosum, Syzygium jambos, Syzygium nervosum and Syzygium praecox and to see intra and inter species variation among them. The wood samples were taken at breast-height from straight bole and uniform crowned trees. The present study showed that all the selected species shared common features like simple perforation plate, vestured inter-vessel pits, vessel-ray pits, disjunctive ray parenchyma cells, diffuse, diffuse-in-aggregate, vasicentric, aliform and confluent types of axial parenchyma Diffuse porous and indistinct fruticosum were observed. The vessels were mostly barrel shaped with small or long tails at one or both ends in all species except tube shaped in S. jambos and drum shaped in S. fruticosum. Spiral thickenings were present in the tails of S. nervosum and S. fruticosum. Fibres were thin walled and non-septate. Occasional septate fibres and vasicentric tracheids were present in S. nervosum and S. jambos. Crystals in ray of S. nervosum and S. fruticosum and silica bodies in axial parenchyma of S. jambos were observed. The fibre percentage and wood density were maximum in S. jambos whereas moisture content was minimum in S. jambos. Principal Component Analysis revealed a close relationship among all species. Therefore, the qualitative characteristics and all quantitative anatomical characteristics can be used for reliable identification of Syzygium species.
THE GROWTH OF LOCAL TREE SPECIES ON POST-COAL MINING AREAS IN EAST KALIMANTAN
Authors: Adman Burhanuddin , Nugroho Ardiyanto Wahyu , Yassir Ishak 
Published: January 2025

Post-coal mining areas need rehabilitation to restore its functionality. Not all plants could grow well on bare ex-coal mining area because of the excessive light intensity and extreme temperature fluctuations. This study is aimed to determine suitable local tree species for rehabilitating mined areas. Planting was carried out in November 2012, and observations were made in November 2015. The study site was in the district of Samboja, Kutai Kartanegara, East Kalimantan Province, Indonesia. Research results revealed that seven tree species survived well in the ex-coal mining land, i.e., Vitex pinnata L., Syzygium scortechinii (Merr.) Merr. & Perry, Syzygium polyanthum (Wight) Walp., Shorea balangeran (Korth.) Burck, Macaranga motleyana (Mull.Arg.) Mull.Arg., Cleistanthus myrianthus (Hassk.) Kurz and Syzygium lineatum (DC.) Merr. & L.M. Perry. From the seven species V. pinnata, Sy. scortechinii and Sy. polyanthum performed best in both survival and growth rates. This study suggests those three species are excellent local tree species for ex-coal mining rehabilitation, not only because of their high survival rate (≥80%) and fast-growing but also they produce favourable fruits and flowers for wildlife.
Internalisasi Nilai Sila Ke-2 Pancasila dalam Memperkuat Toleransi di SMP Negeri 5 Balfai Penfui Timur Kupang
Authors: Maria Cristina Ngadha  , Yulsi Nitte  , Vinsen Manek Ati  , Sifra Betel Kusmawan  , Vinny Christin Nenoharan  , Melania Novilia Olinti  , Titania Agata Mbeo  
Published: January 2025

Internalization is the process by which individuals adopt, comprehend, and integrate specific values, norms, or concepts into their personality structure, making them an integral part of their consciousness and daily behavior. This process plays a crucial role in shaping individual identity and fostering social cohesion within society. Internalization typically occurs through various mechanisms, such as formal education, family socialization, social interactions, and personal experiences. This study aims to explore the dynamics of internalization in the contexts of education, culture, and organizations, focusing on factors influencing the success of the internalization process. The findings reveal that effective communication, a supportive environment, and active individual engagement are key elements in achieving successful internalization. These results hold.
Efectos de una intervención educativa con apoyo a la autonomía en la motivación y competencia académica en educación física
Authors: Llorca-Cano Miguel , Gallardo-Márquez Federico , Huescar Hernández Elisa , Barrachina-Peris Julio , Moreno-Murcia Juan Antonio 
Published: January 2025

The aim of the study was to test the effect of an autonomy support teaching style on subject interest, academic competence, basic psychological needs and autonomous motivation in adolescent students in physical education classes. The sample consisted of 142 students aged 12 to 14, out of whom 84 students were in the intervention group and 58 in the control group. After an intervention with autonomy support for 22 classes, differences were found in favour of the intervention group in satisfaction of basic psychological needs, autonomous motivation, interest and academic competence in physical education classes. The study provides evidence of the effectiveness of autonomy support programs in physical education classes, emphasizing the importance of pedagogical strategies and educational programs that promote the development of basic psychological needs, self-determined motivation and their positive consequences in relation to physical education classes.
El objetivo del estudio fue comprobar el efecto de un estilo interpersonal de apoyo a la autonomía del docente en el interés por la materia, la competencia académica, las necesidades psicológicas básicas y la motivación autónoma en estudiantes adolescentes en clases de educación física. La muestra estuvo compuesta por 142 estudiantes de entre 12 y 14 años, de ellos 84 estudiantes estaban en el grupo de intervención y 58 en el grupo control. Tras una intervención con apoyo a la autonomía durante 22 clases, se encontraron diferencias a favor del grupo de intervención en la satisfacción de las necesidades psicológicas básicas, la motivación autónoma, el interés y la competencia académica en clases de educación física. El estudio proporciona evidencias de la eficacia de los programas que apoyan a la autonomía en las clases de educación física, haciendo hincapié en la importancia de las estrategias pedagógicas y los programas educativos que promueven el desarrollo de las necesidades psicológicas básicas, la motivación autodeterminada y sus consecuencias positivas en relación con las clases de educación física.
Caracterizando la implementación del Grand Round como estrategia de formación del Personal de Tecnología Médica de la Pontificia Universidad Católica de Valparaíso
Authors: Medina-Vásquez Bárbara , Garrido-Miranda José Miguel , Reyes-Román Sandra , Zett Claudio 
Published: January 2025

The Grand Round is a strategy used in medical education based on the presentation of clinical cases that promotes the learning of practical and professional skills. The School of Medical Technology at the aforementioned university implemented a virtual mode of Grand Round during the pandemic to enable students to develop clinical reasoning, communication skills, and the ability to integrate knowledge. The objective of this article is to characterize the implementation of their strategy in the ophthalmology and bioanalysis specialties. Student interactions observed in the classes are analyzed using a phenomenological approach and a study designed on the basis of an intrinsic case study. The results suggest two main dimensions: first, the involvement of the students, and second, the mediation of the teachers. In conclusion, the Grand Round is an opportunity for active and meaningful learning that requires ensuring conditions for the best interaction of students and to enhance their positive attitude.
El Grand Round es una estrategia utilizada en la formación médica basada en la presentación de casos clínicos del área de la salud que favorece el aprendizaje de competencias prácticas y profesionales. La Escuela de Tecnología Médica de la universidad estudiada instauró una modalidad virtual de Grand Round durante la pandemia con el fin de que el estudiantado desarrollara competencias de razonamiento clínico, habilidades comunicacionales y capacidad de integrar los conocimientos. El objetivo del artículo es caracterizar el modo de implementación de la estrategia en las especialidades de oftalmología y bioanálisis. Para esto, mediante un enfoque fenomenológico y un diseño basado en un estudio de casos de tipo intrínseco, se analizan las interacciones de los y las estudiantes observadas en las clases. Los resultados sugieren dos dimensiones principales, primero, la implicación del estudiantado y segundo, la mediación del cuerpo docente. Se concluye que el Grand Round es una oportunidad para el aprendizaje activo y significativo. Existe el anhelo y desafío por aumentar la interacción de los y las estudiantes y comprender sus actitudes.
Evaluando información contradictoria
Authors: Pérez Garcia-Madrid Rocío , Castells Gómez Núria , Minguela Marta 
Published: January 2025

Information and communication technologies provide us with multiple sources and diverse information on the same subject, which makes it difficult to assess this information and draw conclusions from it. This article presents the results of an intervention program aimed at promoting critical thinking, focusing on teaching students to elaborate critical questions and enabling them to correctly select and evaluate the evidence presented in the texts. The study was carried out with four groups of secondary education students (2 control groups and 2 intervention groups) in a natural sciences course. The results show a greater ability to formulate critical questions, and a greater ability to correctly select and evaluate the evidence of the texts by participants in the intervention groups, compared to the students of the control groups. These results support the possibility of teaching students to assess the reliability of the information they read, which is a priority nowadays to help them develop critical thinking to face the multiple contradictory pieces of information at their disposal.
Las tecnologías de la información y la comunicación ponen a nuestro alcance múltiples fuentes e informaciones diversas sobre un mismo tema, lo que dificulta la tarea de valorarlas y extraer conclusiones al respecto. En este artículo se presentan los resultados de la aplicación de un programa de intervención dirigido a promover el pensamiento crítico, centrado en enseñar al alumnado a elaborar preguntas críticas, capacitándoles para seleccionar y valorar correctamente las evidencias presentes en los textos. El estudio se realizó con cuatro grupos de 3º de ESO (2 grupos control y 2 grupos de intervención) en el área de ciencias naturales. Los resultados muestran una mayor capacidad para formular preguntas críticas sobre los textos y una mayor habilidad para seleccionar y valorar correctamente las evidencias de los textos por parte del alumnado de los grupos de intervención frente al de los grupos control tras la aplicación del programa. Estos resultados avalan la posibilidad de enseñar a los y las estudiantes a valorar la credibilidad de las informaciones que leen, lo que resulta prioritario en el contexto actual para ayudarles a desarrollar el pensamiento crítico ante las múltiples informaciones contradictorias a su alcance.
Diseño y validación de un instrumento para medir el conocimiento sobre identidad de género y orientación sexual en estudiantes chilenos de educación superior
Authors: Mejia Elvir Percy , Sandoval-Henríquez Francisco 
Published: January 2025

Knowledge of gender identity and sexual orientation is essential to build more inclusive, equitable and respectful societies, where each person can live authentically without facing discrimination or stigmatization. The research focused on designing and validating an instrument to measure knowledge of gender identity and sexual orientation in Chilean higher education students. For this task, rigorous criteria were followed in the design and validation process: theoretical review, expert judgment, cognitive interview, and exploratory and confirmatory factor analysis. The instrument was administered to a convenience sample of 401 students belonging to a higher education institution located in the Biobío region, Chile. The results revealed a latent structure with adequate fit to the data, composed of 15 items underlying the variables of gender identity and sexual orientation. Reliability was established at an Omega coefficient of .87 and a Cronbach's alpha of .86, indicating satisfactory internal consistency. The instrument is a tool that seeks to promote inclusion, equity and understanding, by identifying areas of ignorance or misunderstandings that could contribute to discriminatory attitudes or unintentional exclusions in the context of higher education. It also provides information for the design of future educational programs that promote inclusion, equity, and understanding.
El conocimiento hacia la identidad de género y la orientación sexual es esencial para construir sociedades más inclusivas, equitativas y respetuosas, donde cada persona pueda vivir auténticamente sin enfrentar discriminación o estigmatización. La investigación se enfocó en diseñar y validar un instrumento para medir el conocimiento hacia la identidad de género y la orientación sexual en estudiantes chilenos de educación superior. Para este cometido, se siguieron criterios rigurosos en el proceso de diseño y validación: revisión teórica, juicio de expertos, entrevista cognitiva y análisis factoriales exploratorio y confirmatorio. El instrumento se administró a una muestra por conveniencia de 401 estudiantes pertenecientes a una institución de educación superior ubicada en la región del Biobío, Chile. Los resultados revelaron una estructura latente con adecuado ajuste para los datos, compuesta por 15 ítems que subyacen a las variables de identidad de género y orientación sexual. La fiabilidad se estableció en un coeficiente Omega de .87 y un alfa de Cronbach de .86, indicando una consistencia interna satisfactoria. El instrumento es una herramienta que busca promover la inclusión, la equidad y la comprensión, al identificar áreas de desconocimiento o malentendidos que podrían contribuir a actitudes discriminatorias o exclusiones involuntarias en el contexto de la educación superior. Asimismo, proporciona información para el diseño de futuros programas educativos que promuevan la aceptación de las diferencias.
POTENCIAL TERAPÊUTICO DO HYPERICUM PERFORATUM NO TRATAMENTO DO TRANSTORNO DEPRESSIVO MAIOR: REVISÃO INTEGRATIVA
Authors: Cozer Martinelli Julia , Antunes Pancieri Eduardo , Tereza do Sacramento Henriqueta 
Published: January 2025

Introdução: O extrato seco da planta medicinal Hypericum perforatum reconhecido como inibidor da recaptação da serotonina, tem sido utilizado em diversos países europeus no tratamento de depressão unipolar, um dos transtornos mentais mais prevalentes no mundo, e no Sistema único de saúde do município de Vitória, consta da Relação municipal de medicamentos (REMUME). Objetivos: Identificar o potencial terapêutico e a efetividade do uso do H. perforatum no tratamento do Transtorno Depressivo Maior. Métodos: Trata-se de uma revisão integrativa de busca realizada na base de dados Portal Periódicos da CAPES. Incluiu-se artigos originais de ensaios clínicos randomizados, publicados nos anos de 2000 a 2023, revisados por pares, de acesso aberto, nos idiomas inglês, português e espanhol. Excluiu-se artigos duplicados e não realizados em humanos. Na busca identificaram-se 118 artigos e após os critérios de seleção, elegibilidade e inclusão foram analisados 9 artigos. Resultados: Os estudos revisados compararam o efeito do H. perforatum com outros antidepressivos como Fluoxetina, Paroxetina, Sertralina e Imipramina e com ele próprio em diferentes doses. Sua dose varia de 500 a 1.800 mg/dia e a duração da intervenção variou de 6 a 84 semanas. A maioria dos estudos revisados demonstrou resultados significativos na: diminuição dos Escores de Depressão com o tratamento com H. perforatum; superioridade dos grupos que receberam o fitoterápico em relação ao grupo placebo; eficácia na profilaxia contra remissão e recaída. Conclusão: Aponta-se para a eficácia do H. perforatum no tratamento do Transtorno Depressivo Maior modulando os neurotransmissores cerebrais responsáveis pela regulação do humor. Além disso, demonstrou um bom perfil de segurança e pouca incidência de efeitos colaterais.