bluuebunny/crossref_metadata_2025_split huggingface dataset:
Estudio y determinación del coeficiente de descarga en toberas de flujo crítico
Authors: Cruz Maya J.A. , Sánchez Silva F. , Carvajal Mariscal L. , Tolentino Eslava G. 
Published: November 2024

En el presente trabajo se desarrolla un estudio teórico-numérico del coeficiente de descarga en toberas toroidales de flujo critico diseñadas bajo la norma IS0-9300, operando en régimen de capa limite turbulenta. El estudio tiene como objetivo evaluar la incidencia de los efectos viscosos en la región de capa limite y el comportamiento bidimensional del flujo en el coeficiente de descarga, para fluidos con número de P, =-0.7. Como resultado del estudio se obtiene una correlación teórico-numérica para determinar este coeficiente en régimen de capa limite turbulenta basada en diversos parámetros dinámicos y termodinámicos del fluido y en la configuración geométrica de la tobera, esta correlación es puesta en función del número de Reynolds referido al diámetro de la garganta de la tobera. La determinación del coeficiente de descarga basa su desarrollo en el estudio de dos zonas de flujo, la primera de ellas comprende la región de esfuerzos viscosos del fluido en la región de capa limite, la segunda zona es referida al núcleo de la tobera en el cual el flujo se puede considerar irrotacional, para llevar a cabo el estudio del flujo en estas zonas se utiliza la teoría de capa limite turbulenta para la primera de las mismas y la simulación numérica del flujo bajo un contexto idimensional para la segunda zona. La correlación obtenida del coeficiente de descarga es validada mediante una comparación directa contra correlaciones experimentales de la norma IS0-9300 y del Korea Research Institute of Standards and Science (KRJSS), en un rango del número de Reynolds basado en la garganta de la tobera de l.4 a 2.6 x 106. La coincidencia entre el modelo propuesto y las correlaciones experimentales es menor de 0.2%.
Highly Accurate Customer Churn Prediction in the Telecommunications Industry Using MLP
Authors: Rabih Rahimullah , Weifeng Sun  , Majid Ayoubi  , Khan Wahib Jamal  
Published: November 2024

Predicting customer Churn is of principal importance for many businesses, as it directly influences the continued utilization of company products by consumers and has a significant impact on company’s financial health and sustainability. However, accurately forecasting customer attrition within the telecommunications sector presents considerable challenges. In response to this need, we propose a novel and highly accurate churn prediction model utilizing a Multilayer Perceptron (MLP) architecture. Our methodology begins with thorough data preprocessing, followed by the application of MLP to predict customer Churn. By employing the Synthetic Minority Over-sampling Technique (SMOTE) and iterative balancing, our proposed model has demonstrated an accuracy improvement of at least 5%, alongside a minimum 5% increase in the F1-score, when compared to existing state-of-the-art algorithms on the widely recognized Telco-Customer-Churn dataset. This research not only expands the opportunities for enhancing the interpretability of predictive models but also fosters a deeper understanding of Churn prediction mechanisms. Ultimately, these advancements contribute to the commercial sustainability and financial stability of telecommunications companies by facilitating more informed decision-making processes regarding customer retention strategies.
The Effect of Acupressure Method on Dysmenorrhea in Adolescent Woman at Muhammadiyah 1 Gresik Junior High School
Authors: Kasih Ginanjar Anggita , Irawan Dwi Dianita , Sulistiyowati  
Published: November 2024

Adolescent girls are more susceptible to dysmenorrhoea which is influenced by many factors, one of which is the mental condition of adolescents who experience menstruation. The aim of the research was to analyze the effect of the acupressure method on dysmenorrhoea in young women at Muhammadiyah 1 Gresik junior high school. This research design uses the Pre-Experiment method with a One Group Pretest Posttest design. The population was 44 teenagers who experienced dysmenorrhoea, using the Simple Random Sampling technique, 40 teenagers were obtained. This data was taken using a questionnaire and Visual Analogue Scale (VAS) scores. After tabulating the data, it was analyzed using the Paired t Test with a significance level of p = <0.05. The results of the study showed that the average dysmenorrhoea scale before the acupressure method was carried out was 5.6 and after the acupressure method was carried out it was 2.28. Based on the results above, the significance value is sign=0.000<0.05. This means that there is an influence of the acupressure method on dysmenorrhoea in young women at Muhammadiyah 1 Gresik junior high school
Investigation of the impact of organic and inorganic halides on the ageing stability of paper with iron gall ink
Authors: Keraitė Greta , Sivakova Birutė , Kiuberis Jonas 
Published: November 2024

Degradation of cellulose in historic manuscripts with iron gall ink leads our heritage to deterioration. Direct aqueous or non-aqueous methods of treatment, which are often used in practice, can damage the authenticity of documents. Therefore, other methods without any wet curative procedures during treatment are in great request.The aim of this work was to evaluate the efficiency of interleaving treatments performed with interleaves containing organic (tetrabuthylammonium bromide and 1-ethyl-3-methylimidazolium bromide) and inorganic (KI and KBr) halide salts on the stability of paper with iron gall ink during ageing. The effect of interleaving was compared with 1) the efficiency of direct treatment of samples and 2) the established conservation procedure – calcium phytate/calcium hydrocarbonate treatment.To evaluate the stabilization effect of different compounds and the efficiency of particular conservation technique measurements of the polymerization degree (viscosimetry, size exclusion chromatography – SEC) and pH were performed before and after accelerated ageing. Colour change in paper samples was determined by reflection measurement using an integrating sphere with a halogen light source. The condition of paper fibers was studied using optical microscopy and scanning electron microscopy (SEM).The tentative results demonstrate that the effective stabilization of paper containing iron gall ink during ageing may successfully be achieved by interleaving using alkaline paper impregnated with KBr.
Biomimetic mineralisation on cellulose/cuttlebone scaffolds
Authors: Palavenienė Alisa , Glambaitė Kristina , Jaskūnas Andrius , Baniukaitienė Odeta , Liesienė Jolanta 
Published: November 2024

The impact of cuttlebone microparticles on the in vitro bioactivity and physical-chemical characteristics of cellulose-based scaffolds during biomimetic mineralisation in a simulated body fluid (SBF) was studied. In vitro bioactivity of cellulose/cuttlebone scaffolds was shown, because hydroxyapatite precursors were formed on the surface of scaffolds during soaking in SBF. It was also shown that the incorporation of cuttlebone microparticles into the cellulose-based matrix positively affected the physical-chemical properties of scaffolds, such as water retention, swelling degree and degradation profile (by means of weight loss). Additionally, neutral pH values of SBF during the prolonged soaking (up to 24 weeks) of scaffolds clearly argued in favour of developed scaffolds for bone tissue engineering applications.
Investigation of distribution of metals in Cr3+-doped Y3Ga5O12 and Gd3Sc2Ga3O12 using ICP-OES and EDX
Authors: Butkutė Skirmantė , Turan Kübra , Žarkov Aleksej , Kontrimavičiūtė Eglė , Tautkus Stasys , Ramanauskas Rimantas , Kareiva Aivaras 
Published: November 2024

In this study the series of Cr3+-doped Y3Ga5O12 (YGG) and Gd3Sc2Ga3O12 (GSGG) garnets were investigated. The garnet samples doped with a different amount of Cr3+ were synthesized using an aqueous sol–gel combustion synthesis method. The phase purity and morphology of the obtained garnets were characterized by X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM). The chemical composition of differently Cr3+-doped garnet structure compounds was analysed and compared with the nominal one. The content of elements in all samples was determined by inductively coupled plasma optical emission spectrometry (ICP-OES) after dissolving these garnets in diluted nitric acid and by energy-dispersive X-ray spectroscopy (EDX) coupled with SEM. The empirical formula were calculated for both garnet series and compared with the theoretical formula.
Patrimonio, territorio y ciudadanía en Educación Infantil: concepciones del alumnado
Authors: Arroyo Mora Elisa , Martín-Cáceres Myriam J. , Cuenca López José María 
Published: November 2024

Early Childhood Education is the ideal stage to begin to implement heritage education that reinforces students' identity links with their territory and community and promotes participation in their environment. Thus, the aim of this study is to compare the conceptions of heritage, territory and citizenship of two groups of students at the 5-year old level on the basis of their previous participation –or lack of it– in innovation projects in heritage education. To this end, a group interview and a drawing selection form were used as data collection instruments, ATLAS.ti v.23 software was used to analyse the information and a system of categories was used as a reference for its interpretation. The results reveal significant differences between the two groups in relation to their concept of heritage and citizenship, and similarities in terms of their notion of territory and environment.
La Educación Infantil es la etapa idónea para que se comience a implementar una educación patrimonial que refuerce los vínculos identitarios del alumnado con su territorio y su comunidad y que promueva la participación en su entorno. Así, el objetivo de este estudio es comparar las concepciones sobre patrimonio, territorio y ciudadanía de dos grupos de estudiantes del nivel de 5 años en base a su participación previa –o ausencia de ella– en proyectos de innovación en educación patrimonial. Con este fin, se han utilizado una entrevista grupal y una ficha de selección de dibujos como instrumentos de recogida de información, el software ATLAS.ti v.23 para el análisis de la misma y un sistema de categorías como referente para su interpretación. Los resultados muestran diferencias significativas entre ambos grupos en relación con su concepto de patrimonio y de ciudadanía y similitudes en cuanto a su noción de territorio y medioambiente.
Las mujeres de la antigua Grecia en la producción historiográfica de Emilio Castelar
Authors: Iriarte Unai 
Published: November 2024

The present article examines the ancient Greek female universe in Emilio Castelar's “Galería histórica de mujeres célebres” (Historical Gallery of Famous Women). In this relatively unknown work, the former republican president conveys his conception of the role of women throughout the centuries. In order to delve into the understanding of women in the Hellenic kosmos, the methodology has focused on two characteristics that have defined women in history: their low visibility and high vulnerability. The result of this research reflects that, contrary to expectations, Emilio Castelar is able to present significant differences among women in the ancient Greek world that go beyond the clichés found in literary sources. This investigation highlights the importance of investing in receptions of the classics to understand how the Greek past has been transmitted to us.
El presente artículo estudia el antiguo universo femenino griego en la Galería histórica de mujeres célebres de Emilio Castelar. En esta obra tan poco conocida, el expresidente republicano traslada cuál es su concepción sobre el papel de la mujer a lo largo de los siglos. A fin de ahondar en el conocimiento de la mujer del kosmos heleno, se ha atendido metodológicamente a dos características que han caracterizado a las mujeres en la Historia, esto es, su baja visibilidad y su alta vulnerabilidad. El resultado de esta investigación refleja que, pese a lo que podría pensarse, Emilio Castelar es capaz de exponer importantes diferencias entre las mujeres del mundo griego antiguo que van más allá del cliché propio de las fuentes literarias. Esta investigación pone de manifiesto la importancia de apostar por trabajos de recepción de los clásicos para conocer cómo nos ha sido legado el pasado griego.
Cambio y continuidad de la asignatura de Historia en la enseñanza secundaria. Entre reformas e innovaciones
Authors: Duarte Piña Olga 
Published: November 2024

This study begins at the beginning of the 20th century and reaches the present day. It systematically addresses the analysis of History as a school discipline. In such a broad time frame we investigate its evolution in regulations and in innovative projects in order to describe and categorize the chosen contents, the methodological guidelines and the purpose of historical knowledge. There are few confluences between reform and innovation; also that, with various regulatory changes, the nineteenth-century scheme of a History by ages, positivist and Eurocentric has remained; and although new historiographical paradigms have emerged and methodological orientations focused on the student and their learning emerged, the subject even lost academic and social value; however, it is clear that the innovation movements generated changes, without achieving widespread transformation in practice but in the school settings they were able to influence.
Este estudio comienza a principios del siglo XX y llega a la actualidad. Aborda de forma sistemática un análisis de la Historia como disciplina escolar. En tan amplio arco temporal investigamos su evolución en la normativa y en los proyectos innovadores con la finalidad de describir y categorizar los contenidos seleccionados, las orientaciones metodológicas y la finalidad del conocimiento histórico. Se constatan escasas confluencias entre reforma e innovación, también que, siendo diversos los cambios normativos, el esquema decimonónico de una Historia por edades, positivista y eurocéntrica ha permanecido; y aunque surgieron nuevos paradigmas historiográficos y orientaciones metodológicas centradas en el estudiante y su aprendizaje, la asignatura llegó incluso a perder valor académico y social; sin embargo, se comprueba que los movimientos de innovación generaron cambios, sin lograr una transformación generalizada en la práctica, pero sí en los ámbitos escolares en los que éstos pudieron influir.
Evaluation of School Zoning Policy in Improving Accessibility and Quality of Education in Sidoarjo Regency
Authors: Adi Setiawan M. Wahyu , Mustofa Amirul 
Published: November 2024

This research aims to evaluate the zoning system of education implemented by the Sidoarjo Regency government to accept students who live within the closest radius of the school. The zoning policy aims to provide equal opportunities for every child to receive quality education. This research employs a qualitative method, with data collection through interviews and documentation. The results show that State Junior High School (SJHS) 1 Krian and State Junior High School 2 Wonoayu meet the indicators of effectiveness, adequacy, and accuracy in the zoning policy, but do not meet the indicators of equity and responsiveness. The indicators of accessibility and quality of education indicate that adequacy, responsiveness, and accuracy are appropriate, while effectiveness and equity are still lacking. The education program is still in the adjustment process, which means that access for children with special needs is not yet optimal. Although the zoning policy has successfully improved accessibility and quality of education in both schools, there are still shortcomings due to parents' lack of understanding of this policy. Therefore, more in-depth education is needed to enhance public understanding of the zoning system.
Metode Tutor Sebaya Berbantuan Papades: Alternatif Solusi Meningkatkan Hasil Belajar Matematika Siswa Sekolah Dasar
Authors: Renta Wirda Dela , Siti Azizah  , Selviari  
Published: November 2024

Tujuan Penelitian ini untuk meningkatkan ketercapaian hasil belajar kognitif matematika materi penyajian data peserta didik kelas V melalui metode tutor sebaya berbantuan media pembelajaran PAPADES (Papan Penjumlahan Desimal). PeneIitian ini menggunakan jenis PeneIitian Tindakan Kelas (PTK) dengan dua siklus yang masing-masing terdiri atas tahap perencanaan, pelaksanaan, observasi, dan refleksi. Subjek peneIitian adalah keseluruhan peserta didik kelas V SDN Dukuh Kupang 3 Surabaya tahun pelajaran 2023/2024 yang berjumlah 37 orang. Penelitian Tindakan Kelas ini menggunakan teknik anaIisis data secara kuantitatif untuk menganalisa hasil belajar kognitif peserta didik berupa hasil tes baik sebelum maupun sesudah menerapkan metode tutor sebaya berbantuan media PAPADES. Penelitian ini membuktikan bahwa hasil belajar kognitif peserta didik kelas V SDN Dukuh Kupang 3 Surabaya pada mata pelajaran matematika materi penyajian data telah mengalami peningkatan setelah pelaksanaan siklus I dan II, dengan menggunakan metode Tutor Sebaya berbantuan media pembelajaran PAPADES (Papan Penjumlahan Desimal). Hal tersebut terbukti dengan persentase jumlah peserta didik yang telah tuntas mencapai 43,24% pada siklus I dan 81,08% pada siklus II.
System for Elephant Ear-pattern Knowledge (SEEK) to identify individual African elephants
Authors: Bedetti Anka , Greyling Cathy , Paul Barry , Blondeau Jennifer , Clark Amy , Malin Hannah , Horne Jackie , Makukule Ronny , Wilmot Jessica , Eggeling Tammy , Kern Julie , Henley Michelle 
Published: November 2024

Elephant numbers have drastically declined over the past century with illegal killings, habitat fragmentation and human-elephant-conflict representing the greatest threats. Information on estimates of abundance and demographics are important to understand the long-term implications of these threats. Mark-resighting studies can provide valuable insights but depend on the individual identification of numerous elephants within populations across both Africa and Asia. Most photographic elephant identification studies are still reliant on human memory and manual matching of known individuals. A process that is not only labour intensive but also largely dependent on experiential skills that need to be developed over time by researchers. Over the course of almost 25 years, Elephants Alive has developed a unique System of Elephant Ear-pattern Knowledge (SEEK), which makes allowance for rapid individual identification of savannah elephants with reduced observer bias using basic software while also accommodating missing information or changes in identification features over time.

Résumé
L’effectif de la population d’éléphants d’Afrique connait un déclin rapide depuis le début du siècle avec pour principales menaces, le braconnage, la fragmentation de leur habitat et les conflits hommes/éléphants. Les estimations de leur abondance et les données démographiques sont importantes pour comprendre les implications à long-termes de ces menaces. La méthode capture-marquage-recapture utilisée dans les études, fournie des informations précieuses mais dépend de l’identification individuelle de nombreux éléphants au sein des populations d’Afrique et d’Asie. La plupart des études d’identification photographiques d’éléphants dépendent toujours de la mémoire humaine et de l’appariement manuel d’individus connus. Un processus qui est non seulement minutieux et chronophage mais aussi largement tributaire des compétences expérientielles qui doivent être développées au fil du temps par les chercheurs. En près de 25 ans, Elephants Alive développé un système d’identification unique « System of Elephant Ear-pattern Knowledge (SEEK) », qui utilise le dessin du contour des oreilles des éléphants de savane pour une identification rapide de l’individu avec un biais d'observation réduit, en utilisant un logiciel basique qui tient compte des informations manquantes et des changements des caractéristiques d’identification au fil du temps.
EFFECT OF SUPPLEMENTATION OF ACACIA HONEY AND PIOGLITAZONE ON INFLAMMATORY MEDIATORS AND OXIDATIVE STRESS IN STREPTOZOTOCIN INDUCED DIABETIC RATS
Authors: Khan Mahvash , Khan Umar Ali , Riaz Bushra , Ashfaq Mehvish , Javaid Jabran , Naureen Tallat 
Published: November 2024

Background: Diabetes mellitus (DM) has emerged as a major health threat worldwide. There is an increasing advocacy of natural products in the treatment of DM and its complications. Objective of this study was to see the effect of supplementation of Pioglitazone and Acacia honey on inflammatory mediators and oxidative stress in streptozotocin (STZ) induced diabetic rats. Methods: The study was conducted in Al-Nafees Medical College in association with National Institute of Health, Islamabad. There were 150 male Sprague Dawley rats divided into 5 equal groups. Group-I was taken as normal control whereas Group-II was diabetic control. The Groups-II?V were given STZ through intraperitoneal route. Group-III received Acacia honey for 3 weeks. Group-IV was given intra-peritoneal injection of pioglitazone plus Acacia honey, and Group-V was administered pioglitazone through intraperitoneal route for same dose and duration. Serum catalase, hydrogen peroxide, CRP and TNF-? were measured after three weeks. Statistical analysis was done on SPSS-22. The values were presented as Mean±SEM and p?0.05 was considered significant. Results: On day 25 compared to Group-II, serum TNF-? and hydrogen peroxide levels were significantly decreased in Groups-III, IV and V. The mean serum CRP levels were significantly decreased in Group-III and IV while Group-II and III had significantly raised serum catalase levels. Conclusion: Acacia honey along with pioglitazone decreases oxidative stress as predicted by increase in levels of catalase. This combination also reduces inflammation as measured by decreased levels of CRP and TNF-? in STZ induced diabetic rats.
Pak J Physiol 2024;24(3):18?22, DOI: https://doi.org/10.69656/pjp.v20i3.1536
EXPLORING THE STREPTOZOTOCIN-NICOTINAMIDE MOUSE MODEL IN BALB/C MICE: GAINING INSIGHTS INTO DIABETIC PNEUMOPATHY
Authors: Mahmood Asfia , Syed Tousif Ahmed  , Hameed Abdul , Bhagwani Aneel Roy , Borges Kevin 
Published: November 2024

Background: Diabetic pneumopathy has been a topic of interest in the present era, and it caught the eye during the COVID-19 pandemic. Extensive research provides compelling data supporting the association between diabetes and lung injury, establishing the lung as a principal organ affected by diabetes. However, the understanding of diabetic lung has always remained under shadow. For this purpose, we aimed to search for diabetic lung conditions by using a type 2 diabetic model in BALB/c mice. Methods: The study spanned from May to June 2023 at Ziauddin University. Nicotinamide, followed by streptozotocin, was injected into the mice. Mice were confirmed diabetic on the 7th day and housed for the onset of diabetic lung complications. After 28 days, mice underwent an oral glucose tolerance test and were then sacrificed, followed by the collection of bronchoalveolar lavage fluid and the extraction of the lungs. Lungs were fixed for histological analysis. Results: The presence of increased glycaemic levels, further verified by abnormal glucose tolerance, confirmed the establishment of the type 2 diabetic model. Additionally, the diabetic group showed lung fibrotic changes. Conclusion: The foundation of a type 2 diabetic model with the target of generating pneumopathy was accomplished successfully.
Pak J Physiol 2024;20(3):31?6, DOI: https://doi.org/10.69656/pjp.v20i3.1673