bluuebunny/crossref_metadata_2025 huggingface dataset:
A Vertical Surface Flow Analysis of MHD Nanofluids Influenced by Radiation, Viscous Dissipation, and Joule Heating with Soret and Dufour Effects
Authors: Jayanthi S. , Niranjan H.
Published: June 2024

The purpose of this study is to investigate the effects of radiation and activation energy on mass transfer nanofluids flowing across an expanding sheet in a vertical direction, as well as joule heating, viscous dissipation, Soret and Dufour, and magnetohydrodynamic (MHD) flow. The boundary layer (BL) equations for nonlinear momentum, energy, solute, and nanoparticle volume fraction are reduced by using similarity transformations. After that, the shooting technique and bvp4c are used to numerically solve the boundary layer equations. Schmidt and Eckert’s numbers, along with Soret effects on velocity, temperature, and the volume percentage of nanoparticles, cause an increase in skin friction. Fluid temperature rises significantly with Eckert number. As the Dufour and Schmidt numbers rise, so does the local Nusselt number. A greater thermophoresis parameter, enhanced skin friction, and an increased Schmidt number.
Clinical relevance of circulating tumor DNA in ovarian cancer: current issues and future opportunities
Authors: Trevisi Elena , Sessa Cristiana , Colombo Ilaria
Published: June 2024

Ovarian cancer (OC) is the most lethal gynecologic malignancy worldwide. Due to the lack of effective screening and early detection strategies, many patients with OC are diagnosed with advanced disease, where treatment is rarely curative. Moreover, OC is characterized by high intratumor heterogeneity, which represents a major barrier to the development of effective treatments. Conventional tumor biopsy and blood-based biomarkers, such as cancer antigen 125 (CA125), have different limitations. Liquid biopsy has recently emerged as an attractive and promising area of investigation in oncology, due to its minimally invasive, safe, comprehensive, and real-time dynamic nature. Preliminary evidence suggests a potential role of liquid biopsy to refine OC management, by improving screening, early diagnosis, assessment of response to treatment, detection, and profiling of drug resistance. The current knowledge and the potential clinical value of liquid biopsy in OC is discussed in this review to provide an overview of the clinical settings in which its use might support and improve diagnosis and treatment.
Penggunaan Mind Maping Untuk Meningkatkan Pemahaman Konsep IPS Siswa Pada Materi Keberagaman Budaya Di Indonesia
Authors: Kurnia Ira Restu
Published: June 2024

Penelitian ini dilakukan berdasarkan tanggapan siswa mengenai pembelajaran IPS yang bersifat hafalan. Siswa dituntut untuk mencatat dan mengingat banyak nateri. Oleh karena itu, peneliti menggunakan peta konsep untuk meningkatkan pemhaman siswa dalam pembelajaran IPS. Pembuatan peta konsep merupakan suatu teknik untuk mengungkapkan konsep yang ada dalam kognitif siswa. Subjek dalam penelitian ini adalah siswa kelas IV SDIT Nurul A’Raaf yang berlokasi di wilayah Cikarang Selatan Kabupaten Bekasi. Metode penelitian yang digunakan yaitu metode Penelitian Tindakan Kelas dengan desain Mc. Kemmis dan Taggart. Adapun  instrumen yang digunakan yaitu lembar observasi, lembar wawancara dan tes. Berdasarkan temuan-temuan penelitian menunjukkan bahwa peta konsep dapat meningkatkan pemahaman IPS siswa pada materi Sumber Daya Alam yang dapat dilihat dari semakin banyaknya siswa yang tuntas dalam pembelajaran.
Etnomatematika: Strategi Melahirkan Generasi Literat Matematika Melalui Budaya Lokal Yogyakarta
Authors: Muyassaroh Izzah , Sunaryati Titin
Published: June 2024

Dinamika perubahan zaman menuntut pendidikan untuk melahirkan generasi-generasi literat yang berdaya saing global dengan tetap berpijak pada nilai budaya lokal di daerahnya. Namun dalam pelaksanaannya, dunia pendidikan khususnya sekolah dasar mengalami banyak tantangan terkait literasi matematika dan minat belajar siswa tetang kebudayaan yang ada di daerahnya. Pembelajaran matematika lebih sering dikaitkan langsung dengan simbol-simbol abstrak yang sulit untuk diterima pemikiran siswa usia sekolah dasar yang masih bersifat operasional konkret. Siswa sekolah dasar membutuhkan bantuan media-media konkret untuk mengkonseptualisasikan simbol-simbol matematis yang abstrak. Adapun tujuan penulisan artikel ini yaitu untuk menyajikan konsep matematika berdasarkan konteks budaya lokal atau bisa disebut dengan etnomatematika. Penelitian ini merupakan studi literatur. Hasil penelitian menunjukkan bahwa etnomatematika dapat digali melalui beberapa kebudayaan lokal daerah yang terdapat di yogyakarta seperti makna angka jawa, candi prambanan, motif batik yogjarta, jajanan pasar, masjid mataram Kotagede dan sebagainya. Studi etnomatematika menghubungkan kebudayaan daerah dengan konsep matematika yang akan dipelajari, sebagai jembatan yang mengkontekstualisasikan matematika bagi siswa sekolah dasar.
KEMAMPUAN PEMAHAMAN KONSEP MATEMATIS DITINJAU DARI KECENDERUNGAN GAYA BELAJAR SISWA SEKOLAH DASAR KELAS IV DI KABUPATEN SUMEDANG
Authors: Fujiarti Ari , Kurnia Ira Restu
Published: June 2024

Abstrak
Tujuan penelitian ini yaitu untuk memperoleh deskripsi tentang kemampuan pemahaman konsep matematis ditinjau dari gaya belajar siswa sekolah dasar kelas IV di kabupaten Sumedang. Penelitian ini merupakan penelitian kualitatif dengan pendekatan fenomenologi. Subjek penelitian ini adalah terdiri dari sembilan orang siswa sekolah dasar, yang terbagi dalam tiga kelompok kecenderungan gaya belajar yaitu gaya belajar visual, gaya belajar audiotori dan gaya belajar kinestetik yang masing-masing terdiri dari tiga orang siswa. Hasil penelitian menunjukkan, pada penyelesaian yang berkaitan menyatakan ulang konsep yang telah dipelajari, subjek dengan gaya belajar visual mampu menganalisis soal dengan baik dan menjelaskan secara rinci. Pada penyelesaian yang berkaiatan dengan menerapkan algoritma pemecahan masalah, subjek dengan kecenderungan gaya belajar audiotori memiliki kemampuan perkalian yang baik, namun tidak menggunakan prosedur yang lengkap. Pada penyelesaian masalah yang berkaitan dengan menyajikan konsep dalam berbagai bentuk representasi, subjek dengan gaya belajar kinestetik mampu membuat representasi dari soal agar terlihat konkret.
Kata kunci: kemampuan pemahaman konsep, gaya belajar, siswa sekolah dasar.
 
Abstract
The purpose of this study was to obtain a description of the ability to understand mathematical concepts in terms of learning styles of fourth grade elementary school students in Sumedang. This research is a qualitative research with a phenomenological approach. The subjects of this study consisted of nine elementary school students, who were divided into three groups of learning style tendencies, namely visual learning styles, auditory learning styles and kinesthetic learning styles, each consisting of three students. The result of the research shows that in the related solution restating the concepts that have been studied, subjects with visual learning styles are able to analyze questions well and explain in detail. In solutions related to applying problem-solving algorithms, subjects with a tendency to auditory learning styles have good multiplication abilities, but do not use complete procedures. In solving problems related to presenting concepts in various forms of representation, subjects with kinesthetic learning styles are able to make representations of questions to make them look concrete.
Permainan Tradisional:Upaya Pewarisan Budaya Dan Pendidikan Karakter Melalui Kearifan Lokal Di Sekolah Dasar
Authors: Susanti Atika , Darmansyah Ady , Aulia Nisa
Published: June 2024

Penelitian ini bertujuan untuk memberikan ulasan mengenai kearifan lokal sebagai materi pewarisan budaya; permaianan tradisional sebagai salah satu kearifan lokal; permainan tradisional sebagai wahana pendidikan karakter; dan materi permaianan tradisional di sekolah dasar. Penelitian ini merupakan penelitian kepustakaan (literature research) dengan mengkaji berbagai sumber atau literatur terkait dengan permainan tradisional dalam konteks pewarisan budaya dan pendidikan karakter melalui kearifan lokal di sekolah dasar. Berdasarkan hasil kajian literatur yang dilakukan menunjukkan bahwa salah satu kearifan lokal dalam bentuk permainan tradisional berimplikasi pada pendidikan karakter siswa sekolah dasar. Konten permainan tradisional ini dapat diaplikasikan dalam pembelajaran di sekolah dasar khususnya pada kelas 3 tema 2 â€œBermain di Lingkungankuâ€. Guru dapat memaksimalkan pendidikan karakter melalui kegiatan yang menyenangkan namun tetap sarat nilai melalui permainan tradisional dalam pengaturan kelas.
This study aims to provide a review of local wisdom as material for cultural inheritance; traditional games as one of local wisdom; traditional games as a vehicle for character education; and traditional game materials in elementary schools. This research is a literature research by examining various sources or literature related to traditional games in the context of cultural inheritance and character education through local wisdom in elementary schools. Based on the results of the literature review, it shows that one of the local wisdoms in the form of traditional games has implications for character education for elementary school students. The content of this traditional game can be applied in learning in elementary schools, especially in third grade, theme 2 "Bermain di Lingkunganku". Teachers can maximize character education through fun yet value-laden activities through traditional games in classroom settings.
Supervisi Pendidikan Islam: Meningkatkan Mutu Pendidikan Islam Dalam Konteks Modern
Authors: Edy Sarwo , Sunaryati Titin , Sumarta Sumarta
Published: June 2024

Abstract: This study explores the role of supervision in improving the quality of Islamic education in the context of modern challenges and opportunities. Islamic education plays an important role in shaping moral values, ethics, and academic knowledge in Muslim societies. In the ever-changing modern era, the relevance and effectiveness of Islamic education become increasingly important. The study emphasizes the significance of supervisory practices that encourage sustainable improvement in Islamic education. In conclusion, Islamic education supervision is a crucial factor in improving the quality of Islamic education in the modern era and should be carried out with effective strategies. Therefore, Islamic education supervisors are recommended to pay attention to appropriate strategies and approaches to carry out supervision effectively, in order to achieve its goals and provide optimal results for Islamic education in the future.
Egzosomos – ląstelių komunikacijos mediatoriai ir jų terapinis potencialas
Authors: Čapkauskienė Sandrija
Published: June 2024

Egzosomos yra nanodydžio tarpląstelinės pūslelės, veikiančios kaip tarpląsteliniai mediatoriai. Jas gamina bei išskiria visos organizmo ląstelės. Egzosomos natūraliai susidaro ir atlieka daug svarbių funkcijų sveikame organizme, tačiau esant patologinėms sąlygoms jos prisideda prie imuninį atsaką skatinančių arba slopinančių veiksnių plitimo. Jos tam tikromis sąlygomis dalyvauja ir patogeniniuose procesuose. Pabrėžtina, jog egzosomos gali būti laikomos gydomųjų medžiagų pernešimo priemone, naudojama įvairioms ligoms gydyti.
Impacto de los Problemas Familiares en el Rendimiento Académico de los Niños y Niñas de la IE Paulo VI
Authors: González Herrera Isaura Lorena , Murillo Ortiz Katia Marcela , Diaz Bernal Jorge Andrés
Published: June 2024

El presente artículo nace de una investigación titulada impacto de los problemas familiares en el rendimiento académico de los niños, cuyo objetivo general es analizar el impacto que tienen los problemas familiares en el rendimiento académico de los niños y niñas de grado preescolar de la IE Paulo VI del municipio de Lorica Córdoba.  Esto permitirá identificar cuáles son los problemas familiares que afectan el rendimiento académico de los niños de la IE paulo VI. Metodológicamente se define como una investigación cualitativa de tipo descriptiva y a partir del análisis de fuentes bibliográficas permitirá observar cada uno de esos problemas familiares que afectan la calidad educativa de los niños ya así mismo buscar estrategias para minimizar estas falencias que se presentan en los entornos educativos y que directamente afectan a los niños.
Formación en Primeros Auxilios Psicológicos en Estudiantes de la Carrera de Psicología
Authors: Caballero Arguello María del Carmen
Published: June 2024

El estudio analiza la Formación en primeros auxilios psicológicos en estudiantes de la carrera de Psicología de la Facultad de Humanidades y Ciencias de la Educación dependiente de la Universidad Nacional de Pilar en el año 2024 desde tres aristas: conocimientos básicos sobre primeros auxilios psicológicos, importancia de la enseñanza de primeros auxilios psicológicos y aplicación de los primeros auxilios psicológicos. La metodología utilizada es de carácter descriptiva, de diseño no experimental con enfoque cuantitativo. El universo conforma estudiantes de la carrera de psicología con orientación educacional. El instrumento de recolección de datos aplicado, corresponde a una encuesta en formato online. Los resultados ofrecen información útil sobre la preparación de los estudiantes de psicología y sus percepciones sobre la educación en primeros auxilios psicológicos. Aunque muestran un nivel general de conocimiento y habilidad para abordar crisis emocionales, también destacan áreas de mejora, como la necesidad de fortalecer la capacitación en estrategias para promover el bienestar psicológico continuo en entornos educativos. Para garantizar que los estudiantes desarrollen habilidades útiles y aplicables en situaciones reales, estos resultados resaltan la importancia de crear programas de capacitación más completos y prácticos que incorporen prácticas supervisadas y casos reales. Además, destacan la importancia de la colaboración interdisciplinaria y la formación continua para garantizar un enfoque integral en la atención y promoción de la salud.
Efectos Macroeconómicos de la Inflación y Devaluación en la Rentabilidad Bursátil de los Países de Perú, Chile, Colombia, México y Brasil
Authors: Pastor Paredes Jorge , More Sánchez Verónica , Delgado Farfán Irvin
Published: June 2024

La presente investigación tiene como objetivo principal determinar los efectos macroeconómicos de la inflación y devaluación en la rentabilidad bursátil de los países de Perú, Chile, Colombia, México y Brasil. El método a utilizar es el de pruebas causales, el diseño de investigación es no experimental con enfoque cuantitativo, se basará en un modelo econométrico de regresión de mínimos cuadrados agrupados (MCO) con data panel transversal con el uso del software STATA, para tal efecto, se trabajará con una base de datos con 300 observaciones que contiene información relativa a la rentabilidad bursátil como variable dependiente y las variables inflación y devaluación como variables explicativas para los cinco países. Los resultados con datos agrupados obtenidos confirman que la devaluación es la variable que genera mayor impacto negativo sobre la rentabilidad bursátil para todos los países estudiados, indicando que la devaluación afecta inversamente y en mayor grado la rentabilidad bursátil, mientras que la inflación ha tenido un efecto directo o positivo sobre la rentabilidad bursátil, pero en mucho menor grado. Los resultados obtenidos a nivel país, en Perú y Brasil, el efecto de la inflación sobre la rentabilidad bursátil ha sido inverso, sin embargo, para Chile, Colombia y México este efecto es directo, explica que por cada punto de aumento en la inflación la rentabilidad disminuyó para Perú y Chile, mientras que para los otros países aumentó. Respecto a la devaluación el efecto sobre la rentabilidad bursátil para Perú, Chile y Brasil fue inverso y para Colombia y México fue directo.
Satisfacción de Usuarios Respecto a Servicios Públicos en la Municipalidad Distrital de San Luis – Perú
Authors: Alberto Bueno Ramón Osorio , Aguilar Chávez Bach. Yajaira Elizett , Quispe Faustino Víctor Teodoro , Goicochea Madueño Nelson Leoncio , Valiente Campos María Guadalupe
Published: June 2024

Es crucial para investigadores, políticos y funcionarios públicos en general realizar un estudio sobre la satisfacción de los usuarios con los servicios públicos en la municipalidad distrital de San Luis-Perú por su complejidad en obtener las respuestas de los ciudadanos. El objetivo en esta investigación es determinar el nivel de satisfacción de los usuarios con los servicios públicos, centrándose en sus expectativas.  Para evaluar la satisfacción de los usuarios, se aplicó un cuestionario de 25 preguntas a una muestra de 382 usuarios. El instrumento fue validado por expertos y obtuvo un Alfa de Cronbach de 0,92.; empleando la estadística descriptiva se llegó a obtener como conclusión de que el 39,5% expresa su insatisfacción, el 47,9% responde que no está insatisfecho ni satisfecho y el 12,6% expresa su satisfacción respecto a la variable satisfacción de los usuarios con los servicios públicos que ejecuta la municipalidad distrital.
Ventajas de la Educación Física para Mejorar el Bienestar Integral de los Estudiantes de Noveno Grado de la Unidad Educativa Ciudad de Azogues
Authors: Sucunota Suqui María Gloria
Published: June 2024

El presente estudio tiene como objetivo analizar las ventajas que tiene la educación física en el bienestar integral de los estudiantes de noveno grado de la unidad educativa "Ciudad de Azogues". Se empleó un diseño de investigación cuantitativa y descriptiva, utilizando métodos como la observación, encuestas y cuestionarios. Se utilizó una muestra representativa de 83 estudiantes y una encuesta para recopilar datos relevantes. Los resultados destacan el papel fundamental de la educación física en la mejora de su capacidad para funcionar de manera efectiva en su vida personal y académica, promoviendo valores como el trabajo en equipo, la disciplina, la autoestima y el respeto. Se enfatiza la importancia de estrategias innovadoras en la enseñanza de esta materia para fomentar la actividad física, mental, emocional y social entre los estudiantes. Se destaca la responsabilidad de las Unidades Educativas de fortalecer la educación física para cultivar hábitos de vida saludables y mejorar el rendimiento académico, con potenciales repercusiones en la planificación de programas educativos y de bienestar. Además, se evidencia la necesidad de un manual de rutinas de la educación física, respaldado por la legislación nacional. Investigaciones similares en diferentes instituciones escolares destacan el impacto positivo en el bienestar integral de los estudiantes. En conjunto, estos hallazgos respaldan la implementación de políticas educativas centradas en el fortalecimiento de la educación física para mejorar este bienestar integral, ya que activa y beneficia no solo la salud física, sino también la mental y emocional, y facilita interacciones sociales positivas.
A Dataset for Kinship Estimation from Image of Hand Using Machine Learning
Authors: Ibrahim Fathi Sarah , H. Aziz Mazin
Published: June 2024

Kinship (Familial relationships) detection is crucial in many fields and has applications in biometric security, adoption, forensic investigations, and more. It is also essential during wars and natural disasters like earthquakes since it may aid in reunion, missing person searches, establishing emergency contacts, and providing psychological support. The most common method of determining kinship is DNA analysis which is highly accurate. Another approach, which is noninvasive, uses facial photos with computer vision and machine learning algorithms for kinship estimation. Each part of the Human -body has its own embedded information that can be extracted and adopted for identification, verification, or classification of that person. Kinship recognition is based on finding traits that are shared by every family. We investigate the use of hand geometry for kinship detection, which is a new approach. Because of the available hand image Datasets do not contain kinship ground truth; therefore, we created our own dataset. This paper describes the tools, methodology, and details of the collected MKH, which stands for the Mosul Kinship Hand, images dataset. The images of MKH dataset were collected using a mobile phone camera with a suitable setup and consisted of 648 images for 81 individuals from 14 families (8 hand situations per person). This paper also presents the use of this dataset in kinship prediction using machine learning. Google MdiaPipe was used for hand detection, segmentation, and geometrical key points finding. Handcraft feature extraction was used to extract 43 distinctive geometrical features from each image. A neural network classifier was designed and trained to predict kinship, yielding about 93% prediction accuracy. The results of this novel approach demonstrated that the hand possesses biometric characteristics that may be used to establish kinship, and that the suggested method is a promising way as a kinship indicator.
Long-Term Solar Power Generation Forecasting at Eastern West Large Scale Solar (LSS) Farm using Random Forest Regression (RFR) Method
Authors: Muhammad Aiqal Iskandar  , Muhammad Azfar Shamil Abd Aziz  , S. S. Sivaraju  , Nurdiyana Borhan  , Wan Abd Al-Qadr Imad Wan Mohtar  , Nurfadzilah Ahmad
Published: June 2024

Precise forecasting of power generation and demand is essential for effective resource allocation and energy trading in contemporary energy systems. Power forecasting accuracy has increased dramatically since Random Forest Regression (RFR) techniques were used. The study's primary objective is to forecast electricity generation in Malaysia's Eastern West region, with a concentration on solar energy. The research process entails gathering and examining pertinent factors, weather information, and historical power data. To evaluate the accuracy and predictive potential of RFR models, a specific power grid is used for training, validation, and testing. One of the anticipated results is the creation of an accurate model for power generation predictions, which will help to optimise energy operations and smoothly incorporate renewable sources. The paper examines the advantages, disadvantages, and best practices related to RFR-based power forecasting. The dataset, which spans the years 2019 to 2023, includes 30-minute interval records for the following variables: average output power, ambient temperature, PV module temperature, global horizontal irradiance, and wind speed. Using the RandomForestRegressor class from the scikit-learn library, the RFR model is implemented. In order to assess the model's overall fit, average deviation, and sensitivity to outliers, measures such as root mean square error (RMSE), mean square error (MSE), and mean absolute error (MAE) are used on the test set. The temperature, irradiance, and AC power output of PV modules are found to be strongly correlated.
Lecturers’ Perspectives on the Relevance of Pedagogical Training Programmes offered at One Higher Education Institution (HEI) in South Africa
Authors: Baleni Zwelijongile Gaylard
Published: June 2024

This article investigated how lecturers in one Higher Education Institution (HEI) in South Africa perceived the relevance of pedagogical training workshops offered to them. This investigation was premised on three features of Karl Marx’s Critical Theory, namely empowerment, transformation, and emancipation Marx critical theory, namely empowerment, transformation, and emancipation. An explanatory sequential mixed research method was chosen where questionnaires and interviews were used to collect data. The sample was made up of 51 academics. The target for qualitative data collection was to get 10% of the questionnaire respondents for the interview which consisted of 5 academics. The findings had negative responses like some lecturers feeling their academic qualifications were sufficient for their teaching and others valued research more than teaching. Nevertheless, most lecturers identified relevant areas of pedagogical training. They believe that training in pedagogical strategies empowers them as critical lecturers. In conclusion, pedagogical training empowers lecturers as HE teachers to facilitate better when they obtain better professional qualifications like PGDHE, and SETA accredited courses. The study recommends that to improve the shortcomings of academics who were never trained as teachers, all academics should be provided with proper pedagogical training that is discipline-based as they assume duties in higher education institutions and they should only be employed on probation until they pass these basic teaching modules.

Keywords: Pedagogical Training, Critical Theory, Perspectives, Relevance
Challenges of Conflicting Memories in Oral History Narratives: A Conversation with Troy Phili on Building Charlotte Maxeke’s Biography
Authors: Ndlovu Ayanda Sphelele , Twala Chitja
Published: June 2024

This paper is presented in the form of an interview, encompassing the key voice of Troy Phili, the former Unit Manager for Burial Grounds and Graves, at South African Heritage Resources Agency (SAHRA) between 2005-2013. The paper aims to highlight the distortions in the profiling of Charlotte Maxeke and how this could lead to misrepresentations of her unique role in the struggle. From an oral history perspective, an interview with Troy Phili contributes to the correction of such distortions. Thus, the paper is embedded in this oral testimony. The interview emphasized oral history as a means of correcting historical distortions, as was the case of Troy while working towards the declaration of Maxeke’s gravesite as a national heritage site. This paper also relied on desktop analysis of both primary and secondary sources of data. The authors perceive these tendencies not as seeking to downplay Maxeke’s catalytic life, but how oral history as methodology and technique can be used to rectify historical misrepresentations. The paper contributes to the correction of distortions of representations of Maxeke during the declaration of her gravesite. This adds to the understanding of the historical declaration of gravesites in historicizing the role played by individuals such as Maxeke in South Africa.

Keywords: Charlotte Maxeke, Conflicting Memories, Oral History, Liberation History, SAHRA, Social History, Phili Troy
Investigating Pedagogical Competencies of Post Graduate Certificate in Education Students to Teach Accounting: A South African Case Study
Authors: Sithole Nosihle V.
Published: June 2024

This paper documents the pedagogical competencies of Post Graduate Certificate in Education (PGCE) students prepared to teach Accounting. There is an arguably perspective that students who tailored their teaching qualification through the PGCE programme are not competent to teach at a school level compared to students who did an Initial Teacher Education Bachelors degree. Further, there is an observation that school principals prefer to employ B.Ed. teachers than PGCEs underpinned by the thinking that the former are better prepared in terms of pedagogy. The Social Learning theory foregrounded this study and sought to respond to two questions: What are the pedagogical competencies of PGCE students to teach Accounting? How can pedagogical competency be enhanced in the PGCE programme? This study adopted a qualitative approach and a constructivist paradigm to understand the research phenomenon. Semi-structured interviews were conducted with three school mentors and thematic analysis was employed to analyse the data. The study found that PGCE students are pedagogically incompetent to teach Accounting since they possess insufficient subject knowledge, limited conceptualisation of teaching strategies, and PGCE students dawdle to complete Accounting content. Furthermore, pedagogical competency among PGCE can be enhanced through programme development splitting into two phases and content modules development. In light of the above findings, this study recommends that PGCE students must be provided continuous professional development which would act as a bridge to the perceived incompetency among PGCE students in South Africa. The study also concludes that the PGCE programme among universities must focus more on pedagogical competency through Social Learning theory as it can fully capacitate students to achieve the expected competencies in teaching. The study contributes knowledge and proposes suggestions to improve teaching training programmes, particularly PGCE among South African universities.

Keywords: Accounting, PGCE Students, Pedagogical Competencies, Social Learning, Professional Development
Pulsar Timing Noise from Brownian Motion of the Sun
Authors: Loeb Abraham
Published: June 2024

Recently, pulsar timing arrays (PTAs) reported a signal at nanohertz frequencies consistent with a stochastic gravitational-wave background. Here, I show that the Brownian motion of the Sun as a result of its random gravitational interactions with the cluster of thousands of unmodeled main-belt asteroids of diameters ≲80 km, combined with small inaccuracies in the estimated masses of larger asteroids, introduces timing noise for pulsars, which is up to 20% of the reported signal at frequencies of ∼1 few years–1. The asteroid contribution needs to be modeled better in order to obtain accurate inferences from the PTA signal.
Probing the Distinct Extinction Law of the Pillars of Creation in M16 with JWST
Authors: Li 李 Jun 军 , Chen 陈 Bingqiu 丙秋 , Jiang 姜 Biwei 碧沩 , Gao 高 Jian 健 , Chen 陈 Xi 曦
Published: June 2024

Investigating the extinction law in regions of high dust extinction, such as the Pillars of Creation within the M16 region, is crucial for understanding the densest parts of the interstellar medium (ISM). In this study, we utilize observations from the Near-Infrared Camera and the Mid-Infrared Instrument onboard the James Webb Space Telescope (JWST) to analyze the color-excess ratios E(F090W − λ)/E(F090W − F200W) across a wavelength range of 0.9–7.7 μm. Our method involves performing linear regression on color–color diagrams to derive these ratios. The enhanced detection capabilities of JWST data allow us to probe the distinct extinction law to the densest regions in M16 corresponding to an extinction depth up to A

V
∼ 60 mag. Remarkably, the resultant color-excess ratio curve exhibits a flatter profile than predicted by typical dust extinction models with R

V
= 5.5 for dense ISM environments. Moreover, we observe that the mid-infrared extinction law diverges from the near-infrared power law, showing a tendency for the slope to flatten as the wavelength increases. These findings have significant implications for our understanding of the dust properties in dense interstellar environments.
Sinobdella longitubulus, a new species of spiny eel (Pisces, Mastacembelidae) from the Zhu-Jiang Basin, with a note on the type locality of S. sinensis (Bleeker, 1870)
Authors: Shan Peng , Li Guangyu , Zhang E
Published: June 2024

The spiny eel genus Sinobdella belongs to the family Mastacembelidae of the order Synbranchiformes. Kottelat and Lim (1994) utilised Rhynchobdella sinensis as the type species to propose the genus. Currently, it contains a single species widespread in eastern and southern China and northern Vietnam.

Sinobdella longitubulus, a new species of spiny eel, is here described from the Xi-Jiang of the Zhu-Jiang Basin in Guangxi Zhuang Autonomous Region, southern China. It differs from the single congeneric species S. sinensis in having a more or less white-brown reticulated pattern on the flank, two tubular anterior nostrils longer than or equal to the rostral appendage, an anal fin heavily mottled with dark brown markings and white spots and bearing a narrow white distal margin; shorter pre-anal length; and fewer abdominal vertebrae. The validity of this new species is corroborated by its monophyly recovered in a COI gene-based phylogenetic analysis and its significant sequence divergence with S. sinensis. A note on the type locality of S. sinensis is also given; its type specimen is possibly from mountain streams of Jiangxi Province, in the lower Chang-Jiang Basin.
Methodological design in the use of virtual simulations in Chemistry: A systematic review
Authors: Palacios Ortega Alicia , Pascual López Virginia , Moreno Mediavilla Daniel
Published: June 2024

Virtual simulations are a very useful educational resource to improve the teaching of chemistry. Their use makes it possible to facilitate the comprehension of concepts, promotes the development of scientific competences and even improves student attitudes toward chemistry. However, it is important to point out that a simulation by itself is not enough to improve student learning. Methodological design is a crucial aspect in order for its classroom use to be significant. Simulations must form part of an instructional sequence that promotes said learning, and thus the role of the instructor is key. This work conducts a systematic review with the aim of analyzing how to apply the use of simulations in the teaching of chemistry in secondary schools, delving deeper into the way in which simulations are used from a methodological perspective, in order to improve the learning processes and results. In this sense, it was found that there is an improvement in learning on both the level of content comprehension and in scientific competences. Guided research is also identified as the most effective methodology for the application of simulations in the classroom. With a look to the future, it is suggested that there is a need to conduct research on the continued use of simulations in the classroom, as well as their characteristics and the instructional methods used.
Gender perspectives on educational contributions to the study of video-gaming: A baseline feminist genealogy
Authors: Valdés-Argüelles Cristina , Fueyo Gutiérrez Aquilina , Verdeja María
Published: June 2024

As video games have evolved, they have emerged as useful tools in areas such as education, tackling global issues through their storylines and mechanics. However, never in the history of video games, not even today, has there been parity in the proportion of women directly employed in the development of video games. This paper is part of a broader research project undertaken in the context of a doctoral thesis within the framework of the R+D+I project ‘Building global citizenship with young people: researching transformative practices with participatory and inclusive methodologies’. It provides a historical perspective on video games and their place in culture and society, and attempts to outline a brief genealogy of the contributions of pioneering women in the video game industry. Recognising the work of women and addressing gender representation in video games is now a matter of great importance. Current trends in the video game industry reflect the impact of the pandemic on video game consumption habits, its expected continued growth in the future and its relationship with the development of virtual and augmented reality. Video games are therefore likely to remain an important part of culture and society in the future, with an ever-increasing role in education. It is therefore imperative to showcase the achievements of women in the video game industry, to highlight inequalities and to provide girls with genuine role models.
Intersecciones identitarias en la poesía afrofemenina colombiana del siglo XX
Authors: Hernández Andrea Milena Guardia
Published: June 2024

Cet article cherche à analyser de manière intersectionnelle certaines implications de l’identité féminine racialisée dans les textes de l’Antología de mujeres poetas afrocolombianas. On y trouve, d’une part, l’évocation de la mémoire collective de la diaspora africaine et, d’autre part, l’expérience actuelle d’habiter une nation dominée par la précarité et le racisme. En même temps, les voix poétiques affirment leur expérience féminine à travers leur corps pour exprimer leur désir et leur expérience contrastée de la maternité. L’écriture poétique devient un laboratoire de l’identité en donnant libre cours à la recherche réflexive et à l’interpellation du lecteur potentiel, un exercice identitaire des voix poétiques qui met en évidence leur place dans l’espace social et dans les archives culturelles.
The Effects of Microclimate on the Behaviour of People in Urban Public Spaces: Insights from the Waterfront in Kandy, Sri Lanka
Authors: Deen Akbar Ali
Published: June 2024

Human beings by nature are social beings. Therefore, the provision of public spaces for social activity is an integral part of urban design. It is known that public spaces have positive impacts on the health and well-being of people. However, the modern-day decline in the use of urban public spaces is due to comfortable thermal environments being created indoors through technologies and advanced design principles. In this context, this study examines the effect of microclimatic conditions on the behavior of people in outdoor urban public spaces, in order to identify design methods to create more conducive environments. This research employs a case study method: a plaza and waterfront in the city of Kandy as an urban public space. Data collection involved physical observations, activity mapping, a photographic survey, a thermal sensation questionnaire, 3D modelling, and simulations of the thermal environment. Data was subject to triangulation for establishing validity, to generate a better understanding and to show that tropical climate shade is not the only solution. Air temperature and solar radiation greatly affect the use of urban public spaces and people adapt to environmental conditions by experience. Wind, shade, vegetation cover, and surrounding urban geometry also contribute to thermal perception. It was inferred that there was no one primary factor but rather the culmination of all factors in different ratios that causes the environmental temperature to morph and change, affecting the thermal comfort of a space. This study provides a design-based recommendation in order to achieve an optimum level of thermal comfort and provide design efficacy for urban public spaces.
Successful treatment of severe hepatic impairment in erythropoietic protoporphyria: A case report and review of literature
Authors: Zeng Tao , Chen Shu-Ru , Liu Hao-Qiang , Chong Yu-Tian , Li Xin-Hua
Published: June 2024

BACKGROUND

Erythropoietic protoporphyria (EPP) is a rare genetic disorder stemming from ferrochelatase gene mutations, which leads to abnormal accumulation of protoporphyrin IX primarily in erythrocytes, skin, bone marrow and liver. Although porphyria-related severe liver damage is rare, its consequences can be severe with limited treatment options.

CASE SUMMARY

This case study highlights a successful intervention for a 35-year-old male with EPP-related liver impairment, employing a combination of red blood cell (RBC) exchange and therapeutic plasma exchange (TPE). The patient experienced significant symptom relief and a decrease in bilirubin levels following multiple PE sessions and an RBC exchange.

CONCLUSION

The findings suggest that this combined approach holds promise for managing severe hepatic impairment in EPP.
Development of the application of the Hybrid system to Snow Thrower
Authors: HANAFUSA Jitsumi , WAKITANI Tsutomu , YAMAMOTO Takahiro , INUI Tsutomu
Published: June 2024

As the developmental application of the hybrid system provided with a gasoline engine and electric motors for a power plant, the hybrid snow thrower for general consumer use has been verified based on the key concept of improved handling and operability. The snow clearing system is driven by an engine and simultaneously generates power for two motors which drive the driving system. Computer-controlled travel motion together with automatic control of speed according to work load make for smoothness of travel motion and work alike. Operator load has been reduced significantly by mounting the driving levers on the driving system frame and placing the operating controls in a fixed location. In addition, the use of an electric operating system reduces the amount of force required to operate the various controls.
17 Study on Auto-Ignition and Combustion Completion of n-Butane in a Two-stroke Homogeneous Charge Compression Ignition (HCCI) Engine
Authors: TAKEI Takuya , IIDA Norimasa
Published: June 2024

Homogeneous Charge Compression Ignition (HCCI) is good method to be higher efficiency and to reduce NOx emission and particular matter together than conventional SI combustion engine. But HCCI depends on chemical reaction of fuel and air mixture. So controlling of ignition timing is difficult, and HCCI is high THC and CO emissions because temperature can't reach the enough temperature to reduce those. In this study, we investigated factor for auto ignition timing and combustion completion on n-Butane/Air mixture by a two-stroke HCCI engine. Auto Ignition temperature are known to be decided by fuel(1), for n-Butane, the temperature was 1150±30K. And as we researched combustion completion from In-cylinder gas temperature, increasing In-cylinder gas temperature caused high combustion efficiency and low THC, CO emissions.
24 Noise, Emissions and Fuel Economy Investigation on a Small DI Diesel Using Taguchi Methods
Authors: Win Zaw , Gakkhar R. P. , Jain S.C. , Bhattacharya M.
Published: June 2024

To provide optimal performance of a small DI diesel in relation to noise, emissions and fuel economy, an experimental investigation was carried out using Taguchi methods. A single cylinder 3.5 kW diesel was selected for performance test at different engine speeds, loads and static injection timings. These controlled parameters were varied at three levels and the resulting changes in response variables viz. engine noise, smoke, HC, NOx, CO, CO2 emissions and fuel economy (b.s.f.c) were observed. The levels for low noise, smoke, emissions and b.s.f.c could be predicted and relevant combination of controlled parameters specified. Confirmation engine runs were carried out and the results showed good agreement with the predicted optimized quantities of interest based on Taguchi analysis. The effect of engine parameters to the above responses was evaluated in terms of percent contributions by using analysis of variance. Taguchi method of experimental design was found to be more cost-effective for understanding the relationship between diesel engine parameters and noise, emissions and b.s.f.c than full factorial design.
26 Development of “BF-Coat” for Snowmobile Piston
Authors: HAYASHI Toshio , AKITA Shouichi , MIHOYA Makoto
Published: June 2024

The pistons in a snowmobile engine are subjected to severe temperature conditions not only because snowmobiles are operated in extremely cold temperatures but also because the engine has a high output per unit volume of approximately 150kW/liter. The temperature of the piston top may go from -40°C (when a cold engine is started) to 400°C or higher (when the engine is running at full load). When the piston and cylinder inner wall are cold, the performance of the lubricating oil drops; when they are hot, scuffing may be produced by problems such as tearing of the oil film between the piston and cylinder. When the engine is run at full load for a long time, moreover, the piston is subjected to prolonged high-temperature use, which is conducive to the production of piston boss hole abrasion and ring groove adhesive wear.

There are many piston surface coatings available to resolve these problems, but we use BF-Coat (Black-Fluoro Compound Coating) on the pistons in our 2-stroke snowmobile engines. BF-Coat has the abrasion resistance of anodic oxide coating and excellent sliding characteristics. By coating the entire piston surface with BF-Coat, we have developed a high-quality piston with a more scuff-resistant skirt and abrasion-resistant pin hole, and a ring groove that is more resistant to adhesive wear.
38 Development of Compound-Laser Welding Method for Aluminum-Alloy Structure of Motorcycles
Authors: SAITO Shigeki , MASTUDA Fujiko , ISHIDA Hidenobu , MUROTA Naoya
Published: June 2024

A compound-laser welding method has been developed for the rapid three-dimensional welding of motorcycle aluminum-alloy structural parts. The term “compound-laser welding” means a high-speed welding method in which a number of lasers with different characteristics are arranged on the same axis. This paper reports the results of welding by a compound laser consisting of a YAG laser and a CO2 laser. It was found that compound-laser welding with two or more types of gases mixed as shielding gas gives a better welding performance than single-laser welding due to the advantages of the different lasers used in compound-laser welding.
49 Development of Pb-free Free-Cutting Steel Enabling Omission of Normalizing for Crankshafts
Authors: AMATAKA Atsushi , SUWA Satoru
Published: June 2024

Crankshafts of motorcycles require high strength, high reliability and low manufacturing cost. Recently, a reduction of Pb content in the free-cutting steel, which is harmful substance, is required. In order to satisfy such requirements, we started the development of Pb-free free-cutting steel which simultaneously enabled the omission of the normalizing process. For the omission of normalizing process, we adjusted the content of Carbon, Manganese and Nitrogen of the steel. This developed steel can obtain adequate hardness and fine microstructure by air-cooling after forging. Pb-free free-cutting steel was developed based on Calcium-sulfur free-cutting steel. Pb free-cutting steel is excellent in cutting chips frangibility in lathe process. We thought that it was necessary that cutting chips frangibility of developed steel was equal to Pb free-cutting steel. It was found that cutting chips frangibility depend on a non-metallic inclusion's composition, shape and dispersion. By manufacturing a crankshaft with this steel, the cost of normalizing process was eliminated and reduction of Pb by 13 grams per vehicle became possible. The developed crankshafts have been applied in motorcycles equipped with four-stroke 954cm3 engine.
52 Development of a Four-stroke Engine with Turbo Charger for Personal Watercraft
Authors: KUROSAKI Takaharu , OKADA Kazunori , YOKOTANI Hitoshi
Published: June 2024

There is a movement to apply emission control in a marine engine as well due to high public awareness of environmental concern in the United States. We started at the development of 3-seater Personal Watercraft (PWC) equipped with 4-stroke engines in taking environment conformity and potential into account. The PWC employed series 4-cylinder 1100cc displacement engine that has been used for mass production motorcycles. The engine was modified to satisfy requirements for PWC, as a marine engine, such as performance function and corrosion. In order to achieve greater or equal power/weight ratio as against two-stroke PWCs, a four-stroke engine for PWC with an exhaust turbo charger was developed. As a result, we succeeded in developing an engine that attained top-level running performance and durability superior to competitors' 2-stroke engines. Emission performance of the engine satisfied EPA 2006 and CARB 2004 regulation while fuel economy was also improved 16% compared with competitors' 2-stroke engines.