bluuebunny/crossref_metadata_2025 huggingface dataset:
Inquisitory Birds: Thinking through the Ethics and Assumptions of Playback Responses in Birds
Authors: Whitehouse Andrew
Published: December 2024

A technique employed by both scientists and birders is the use of song playback to elicit a response from a bird. For birders, the intention is to encourage a hidden bird to reveal itself to the observer. On hearing the recording, the bird reacts with either an aggressive territorial response or inquisitory social approach. While the effects of playback on birds are incompletely understood, repeated exposure appears to influence a bird’s subsequent behaviour. Where playback has been widely used, birds sometimes no longer respond to the sounds of their own species, ignore the sound, and thus deviate from their assumed natural behaviour. These effects have raised ethical questions about the use of playback in birding and in some places the practice is banned. This article examines the use of playback in birding and the wider questions this raises. Ethical debates around playback reveal ideas about what birds are, how they can potentially interact with humans, and how the aesthetics of birding are practiced and debated.
Tùn Resùn: Walking in the Sounding Forest
Authors: Kirschstein Natalie , Simonett Helena
Published: December 2024

This paper is based on interviews and conversations conducted while walking through the ‘Klangwald’, a ‘sounding forest’ in the Swiss mountains that features various musical instruments. While our initial intent was to reflect on hearing and listening to all the sounds of the forestscape, our walking conversations revealed a much more holistic sensory experience, and we began to ask the broader question of what it means to sensorially be in and move through the forest. Drawing on anthropology of the senses (Le Breton 2017 [2006]) and expanding on Tim Ingold’s work on movement, knowledge, description, and being in the world (2011), we propose a ‘sensory walking ethnography’. By walking alongside people as we interview them, the conversation – like the walking itself – becomes an experiential and sensorial process rather than a purely linguistic and semantic one. Thus, we explore not only people’s perceptions of the forest environment but also a methodology for investigating that perception. Accompanying interviewees as they articulated what they were sensing – particularly in the liminal spaces and concepts between within and outside of the forest, sound and silence, and constancy and change – provided a deeper understanding of how people relate to, experience, and perceive their lived environment.
Sharp, Loud, Fast, Fierce: Encounters with a Gannetry
Authors: Doolittle Emily , Wood Dawn
Published: December 2024

Sharp, Loud, Fast, Fierce: Encounters with a Gannetry, Swiss Journal of Musicology, New Series 41
“Actualiser” les études de musicologie ? Enjeux à la lumière du multimédia
Authors: Dupuis Florim
Published: December 2024

Partant de la révision des plans d'études de musicologie de l'Université de Genève, cet article questionne les modalités et la finalité d'une "actualisation" des cursus : en tant qu’enseignant-e, pourquoi encourager une telle démarche, et comment ? Au milieu de quels enjeux scientifiques et pédagogiques navigue-t-on ? Ces questions sont explorées au travers de la thématique du multimédia (films, séries, jeux et autres), qui fournit une illustration pertinente aux synergies qui peuvent être établies entre la recherche, les expériences des étudiant-es et la conception des cursus.
A Characterization of One-Element Commutation Classes
Authors: Mamede Ricardo , Santos José Luis , Soares Diogo
Published: December 2024

A reduced word for a permutation of the symmetric group is its own commutation class if it has no commutation moves available. These words have the property that every factor of length 2 is formed by consecutive integers, but in general words of this form may not be reduced. In this paper we give a necessary and sufficient condition for a word with the previous property to be reduced. In the case of involutions, we give an explicitly construction of their one-element commutation classes and relate their existence with pattern avoidance problems.
Exploring the Relationship Between GDP, Carbon Dioxide Emissions, Energy Consumption, Population, and Renewable Energy Production Using Canada as a Model Country
Authors: Chew Jia Ming , Yap Chee Kong , Kumar Krishnan , Cheng Wan Hee , Syazwan Wan Mohd , Nulit Rosimah , Azrizal-Wahid Noor , Mustafa Muskhazli , Okamura Hideo , Horie Yoshifumi , Yap Chee  Wah , Aguol Kennedy Aaron , Ong Meng Chuan
Published: December 2024

This study explores the complex relationships between population growth, gross domestic productivity (GDP), carbon dioxide (CO2) emissions, primary energy consumption, and renewable energy (RE) production in Canada from 1950 to 2021. Using time-series econometric techniques, including Ordinary Least Squares (OLS), Vector Autoregressive (VAR) models, and cointegration analysis, the research investigates how these variables interact over time and their implications for environmental sustainability and economic development. The results indicate that population and GDP growth significantly increase primary energy consumption and CO2 emissions, emphasizing the need for cleaner energy sources. While the positive correlation between population growth and renewable energy production presents opportunities for reducing carbon footprints and fostering economic resilience, there are also risks of overexploitation of renewable resources if energy demand outpaces sustainable supply. The study highlights the importance of sustainable resource management and policy frameworks to ensure that economic growth does not compromise environmental integrity. These findings provide critical insights for policymakers in balancing economic development with environmental sustainability, advocating for increased investment in renewable energy and implementing energy-efficient practices. Future research should expand this analysis to other countries and explore the differentiated impact of various renewable energy sources on economic and environmental outcomes.
Evaluating the Managerial Performance within Construction Projects in Kenya
Authors: Njoka Evans Murangiri , Simon Shadrack Mutungi , Okaka James Ouma
Published: December 2024

Construction projects in Kenya face significant challenges in terms of cost overruns, delays, and quality issues. The performance of construction projects heavily depends on the managerial performance within these projects. This study aimed to evaluate the managerial performance within construction projects in Kenya. A quantitative research strategy and a survey research design were adopted. The study's unit of analysis and target population comprised managers on construction sites. These included middle-level management staff such as site managers, clerks of works, site engineers, general foremen, and construction managers among others who had similar roles in construction projects. A sample size of 95 construction projects was adopted and a response rate of 62% was achieved. Managerial performance in construction projects in Kenya was evaluated using a multidimensional approach whereby eight (8) aspects were considered. These comprised the various management functions established in the literature review. The performance score in each of these functions was as follows; planning (78.6), negotiating (76.6%), supervising (76.2%), coordinating (75.5%), evaluating (75.5%), staffing (73.0%), investigating (65.4), and representing (59.1%). The range between the best and worst performed functions was 19.5%. The overall level of managerial performance in construction projects in Kenya was found to be 72.5%. The findings imply a need for enhanced training focusing on the less performed functions such as staffing, investigating, and representing. This could help bridge the competency gaps observed among site managers and supervisors. Contractors should create a staffing strategy that emphasizes skill assessment and alignment with project needs. Managers need to be encouraged to build strong relationships with other stakeholders through regular engagement initiatives
Traditional Chinese medicine in the treatment of Helicobacter pylori-related gastritis: The mechanisms of signalling pathway regulations
Authors: Zhang Pei-Pei , Li Liang , Qu Hao-Yu , Chen Guang-Yu , Xie Meng-Zhou , Chen Yan-Kun
Published: December 2024

Helicobacter pylori -associated gastritis (HPAG) is a common condition of the gastrointestinal tract. However, extensive and long-term antibiotic use has resulted in numerous adverse effects, including increased resistance, gastrointestinal dysfunction, and increased recurrence rates. When these concerns develop, traditional Chinese medicine (TCM) may have advantages. TCM is based on the concept of completeness and aims to eliminate pathogens and strengthen the body. It has the potential to prevent this condition while also boosting the rate of Helicobacter pylori eradication. This review elaborates on the mechanism of TCM treatment for HPAG based on cellular signalling pathways, which reflects the flexibility of TCM in treating diseases and the advantages of multi-level, multi-pathway, and multi-target treatments for HPAG.
Controversies in fecal incontinence
Authors: Albuquerque Andreia , Rao Satish S C
Published: December 2024

Fecal incontinence is a common condition that can significantly impact patients’ quality of life. Obstetric anal sphincter injury and anorectal surgeries are common etiologies. Endoanal ultrasound and anorectal manometry are important diagnostic tools for evaluating patients. There are various treatment options, including diet, lifestyle modifications, drugs, biofeedback therapy, tibial and sacral nerve neuromodulation therapy, and surgery. In this editorial, we will discuss current controversies and novel approaches to fecal incontinence. Screening for asymptomatic anal sphincter defects after obstetric anal sphincter injury and in patients with inflammatory bowel disease is not generally recommended, but may be helpful in selected patients. The Garg incontinence score is a new score that includes the assessment of solid, liquid, flatus, mucous, stress and urge fecal incontinence. Novel tests such as translumbosacral anorectal magnetic stimulation and novel therapies such as translumbosacral neuromodulation therapy are promising diagnostic and treatment options, for both fecal incontinence and neuropathy. Home biofeedback therapy can overcome some limitations of the office-based therapy. Skeletal muscle-derived cell implantation of the external anal sphincter has been further studied as a possible treatment option. Sacral neuromodulation may be useful in scleroderma, congenital fecal incontinence and inflammatory bowel disease but merits further study.
C-X-C chemokine receptor type 5+CD8+ T cells as immune regulators in hepatitis Be antigen-positive chronic hepatitis B under interferon-alpha treatment
Authors: Xu Zhen-Yu , Dai Zhong-Shang , Gong Guo-Zhong , Zhang Min
Published: December 2024

BACKGROUND

C-X-C chemokine receptor type 5 (CXCR5)+CD8+ T cells represent a unique immune subset with dual roles, functioning as cytotoxic cells in persistent viral infections while promoting B cell responses. Despite their importance, the specific role of CXCR5+CD8+ T cells in chronic hepatitis B (CHB), particularly during interferon-alpha (IFN-α) treatment, is not fully understood. This study aims to elucidate the relationship between CXCR5+CD8+ T cells and sustained serologic response (SR) in patients undergoing 48 weeks of pegylated IFN-α (peg-IFN-α) treatment for CHB.

AIM

To elucidate the relationship between CXCR5+CD8+ T cells and sustained SR in patients undergoing 48 weeks of peg-IFN-α treatment for CHB.

METHODS

This study enrolled 60 patients with hepatitis Be antigen (HBeAg)-positive CHB undergoing 48 weeks of peg-IFN-α treatment. Participants were assessed for eligibility based on criteria such as persistent HBsAg-positive status for at least six months, HBeAb-negative, hepatitis B virus DNA levels exceeding 2 × 104 copies/mL, and alanine aminotransferase (ALT) levels between 2 and 10 times the upper limit of normal. Blood samples were collected at baseline and at weeks 12, 24, 48, and a 24-week treatment-free follow-up (week 72) to measure serum interleukin (IL)-21 concentration via ELISA and to analyze CXCR5 and programmed death-ligand 1 (PD-L1) expression on CD8+ T cells by flow cytometry, CXCR5 is a chemokine receptor that directs immune cells to specific tissues, while PD-L1 is a protein that regulates immune responses by inhibiting T cell activity.

RESULTS

Patients with CHB exhibited significantly lower levels of circulating CXCR5+CD8+ T cells compared to healthy controls (P < 0.01). Notably, CXCR5+CD8+ T cells were prominently expressed in patients who achieved sustained SR compared to non-SR (NSR). A significant correlation was observed between CXCR5 and PD-L1 expression (r = -0.189, P = 0.002). However, there was no significant correlation between serum IL-21 levels and CXCR5+CD8+ lymphocytes (r = -0.03, P = 0.625) or serum ALT levels (r = 0.026, P = 0.678).

CONCLUSION

The enhanced expression of CXCR5+CD8+ T cells in patients achieving HBeAg seroconversion during IFN-α treatment suggests that these cells play a crucial role in antiviral immune responses against hepatitis B. This study highlights the potential of CXCR5+CD8+ T cells as immune regulators in CHB, which may inform future therapeutic strategies to optimize antiviral treatments.
О качестве жизни населения российской Арктики
Authors: Самарина В
Published: December 2024

Монография посвящена проблематике качества жизни специфической
территории — российской Арктики. Сформирована междисциплинарная методология исследования, учитывающая возможность рассмотрения фундаментальных и новейших условий обеспечения социально-экономического развития, повышения качества жизни населения российской Арктики. Выявлены специфика и взаимоотношения социально-экономического развития, экономического роста, качества жизни населения. Установлены особенности субъективного восприятия воздействия государственной политики в Арктике населением арктических территорий. Приведены результаты сопоставления объективных (полученных анализом статистических показателей) и субъективных
(мнения населения) оценок жизнедеятельности в Арктике, что прояснило
связь между субъективными оценками жизни и объективными характеристиками социально-экономического развития арктического региона как целостной системы
и объекта управления.
Работа представляет интерес для широкого круга специалистов: научных работников, преподавателей вузов, специалистов в сфере экономики и управления народным хозяйством, включая вопросы региональной экономики, а также для магистрантов и аспирантов, обучающихся по экономическим специальностям.
Lived Experience of the Burden of Chronic Kidney Disease Among Patients Receiving Treatment in Naval Hospitals in Lagos Nigeria
Authors: Sulyman Funke , Anokwuru Rafiat Ajoke
Published: December 2024

Chronic Kidney Disease (CKD) is a complex condition that requires ongoing management and treatment, which can significantly affect the quality of life for patients. The aim of the study explored the lived experience of the burden of CKD among patients receiving treatment in Naval Hospitals Lagos Nigeria using a phenomenological research design. A total of 12 participants were selected using a purposive sampling technique. Data was collected with an unstructured one-on-one interview using open-ended questions lasting for about 30 minutes on each participant. The researcher ensured reliability of the data by adhering to the rigors of a qualitative research. Structural analysis and in-depth interpretation of meaning to understand the lived experiences of the participant was done to generate themes using Colaizziphenomenological method of data analysis. From the interview, five themes emerged which reflected on lived experiences of patients living with CKD. The findings from this study indicated that financial constraints, restricted life, psychological influence was evident where there were many shared experiences. Inaccessibility to social support service was a major challenge and an extra expense. It also identified building inner strength, family, and spiritual support and prayers as integral components of coping strategies. It is therefore recommended that, routine social and psychological support services and interventions should be incorporated into the care of CKD patients by providing access to counseling services, support groups, and mental health support.
Paradoxes of time in the interpretation of events and predictions under parliamentary control
Authors: LANDE D. , STRASHNOI L.
Published: December 2024

The article explores the complex interplay between parliamentary oversight, legislative initiatives, and societal conditions through the lens of semantic networks and paradoxes. The application of generative artificial intelligence technologies enabled the reconstruction of legislative texts, uncovering hidden contradictions and paradoxes that influence decision-making, including the retroactivity of laws, causality from the future, revisionism of past decisions, and legislative dynamics. The article examines the temporal paradoxes that arise in the process of parliamentary oversight and legislative activity. It analyzes how associative connections, mistakenly perceived as causal, lead to distortions in the chronology of events and decision-making. Special attention is given to paradoxes such as the retroactivity of laws and the revision of political decisions, which complicate the prediction of future outcomes of parliamentary initiatives.
Features of the legal regulation of the protection of state secrets and classified information in some EU and NATO states
Authors: FEDORCHENKO O.
Published: December 2024

The concept, content and features of the circulation of secret (classified) information have been studied. The components of the system of protection of state secrets and other information with limited access are defined. The issue of obtaining, terminating and canceling clearance and access to work with classified information and state secrets, features of marking classified information, the issue of responsibility for disclosing state secrets or classified information based on the generalization of best practices of foreign experience in the regulatory protection of state secrets in some member states was considered NATO and the EU (Germany, Croatia, Estonia). Regulatory requirements and existing standards in the field of protection of state secrets and classified information are defined. Ways to improve the national system of protection of state secrets and official information are detailed, taking into account the highlighted main positive trends in the development of protection of classified information in the leading European states.
Integración de Plataformas de Pago con Seguridad Financiera para la Venta de Cursos del Colegio de Contadores Públicos del Estado de Guerrero (CCPGRO)
Authors: Carrillo Luna Joel , Gazga Portillo José Francisco , De Cruz Silva Karina
Published: December 2024

El presente artículo se centra en la integración de plataformas de pago y la implementación de medidas de seguridad financiera en el sistema web del Colegio de Contadores Públicos del Estado de Guerrero (CCPGRO).  “En un entorno cada vez más digitalizado, la capacidad de ofrecer opciones de pago seguras y convenientes es fundamental para garantizar la satisfacción del usuario y brindar transacciones financieras efectivas” (Salas et al., 2024). La integración de plataformas de pago en el sistema web del CCPGRO se aborda desde una perspectiva técnica y práctica, por lo que, se consideran aspectos como: la compatibilidad de la plataforma de pago, de tal manera que cumpla con los requerimientos que proporciona el CCPGRO para el sistema web; contemplar la experiencia del usuario durante el proceso de pago de los cursos en línea a través del sistema web del CCPGRO; así mismo, se presta especial atención a la seguridad financiera, al implementar medidas que protejan la información de los usuarios, con el propósito de prevenir fraudes financieros. A través de una metodología especifica, se elige la plataforma de pago que cumpla con los requerimientos que solicita el CCPGRO, así mismo, se evalúan las medidas de seguridad financiera, a fin de integrar e implementar la plataforma de pago para la compra de los cursos en línea del sistema web del CCPGRO. Los resultados obtenidos muestran la importancia de las medidas de seguridad informática, como las que ofrece la pasarela de pago conekta (conekta, 2024), esta plataforma cumple con los requisitos que solicita el CCPGRO para el sistema web, al salvaguardar la información financiera de los usuarios, preservando la confianza en el sistema web del CCPGRO. El presente artículo ofrece una visión detallada y práctica sobre la integración de plataformas de pago y seguridad financiera en un contexto institucional específico, al proporcionar informanción sustancial para otros organismos similares que buscan mejorar la infraestructura de pago en línea y garantizar la protección de los datos financieros de los usuarios.
La Teoría Estructuralista del Juego de Piaget Aplicada como Estrategia Pedagógica para Mejorar el Aprendizaje de Matemáticas en Estudiantes de Primero en la I.E. el Gool, la Guajira
Authors: Peñaloza Fuentes Sandra Milena
Published: December 2024

La presente investigación tuvo como propósito general analizar la incidencia de la teoría estructuralista del juego de Jean Piaget en el aprendizaje de las matemáticas de los estudiantes del grado primero de la Institución Educativa el Gool del municipio de Villanueva – La Guajira. El tipo de estudio es cualitativo mediante el diseño de investigación acción; los participantes fueron 3 docentes del área de matemáticas y 9 estudiantes de primer grado; los instrumentos utilizados fueron, el observador del estudiante, el cuestionario, la ficha de diario de campo, formatos de sesiones pedagógicas y la rúbrica evaluativa; los procedimientos se fundamentaron en el diagnóstico, acción, seguimiento y evaluación de la propuesta. La estrategia implementada consistió en desarrollar un conjunto de actividades lúdica y didácticas para resolver operaciones matemáticas concretas teniendo en cuenta las unidades de análisis: espacio, tiempo, objetos, números y símbolos que fundamenta la teoría estructuralista de Jean Piaget. Los resultados evidenciaron que el juego ocupa un lugar primordial entre los intereses naturales del niño, factor determinante en la enseñanza de las matemáticas como una estrategia efectiva en el aula para que los estudiantes accedan al conocimiento matemático superando las barreras y las dificultades que se manifiestan en su comprensión. Se concluyó que la implementación del juego como estrategia didáctica fortalece el aprendizaje y mejorar el proceso de enseñanza de la asignatura
Dificultades técnicas y académicas en estudiantes de comunicación que cursaron fotografía durante el covid-19
Authors: Ramírez Christian May , Santiago Ruiz Amada de los Ángeles
Published: December 2024

En la siguiente investigación se muestra un análisis del proceso de enseñanza aprendizaje en las sesiones de clases en línea de la asignatura de Fotografía, en alumnos del cuarto semestre de la licenciatura en comunicación, de una universidad pública, durante la pandemia del COVID-19. La investigación permite recolectar datos de las dificultades Técnica y Académicas que derivaron de dicho confinamiento. El programa de estudio presentaba características 70% práctica y 30% teórica. El estudio es de tipo descriptivo, con enfoque cuantitativo, la información fue recolectada a través de una encuesta aplicada en el mes de marzo de 2023 con el criterio de inclusión exclusión de estudiantes que cursaron la materia de Fotografía en el periodo escolar 2021-2022, quienes en total fueron 45 informantes. Los resultados del estudio determinaron que la clase impartida de manera virtual no fue lo esperado pues la parte práctica no se generaba de manera personal y permanecían dudas del aprendizaje, a su vez mencionaron que se sentían faltos de conocimientos tan básicos como lo relacionado a una cámara y la composición fotográfica.
Inoculación con microorganismos una alternativa para la producción de lechuga (Lactuca sativa) en ambientes hidropónicos
Authors: Sánchez Macías Tatiana Carolina , Cabrera Zambrano Gicella Mariana , Conforme Anzules Nicole Andreina , Vera Chevez Jennifer Dayana
Published: December 2024

La producción hidropónica de lechuga es una alternativa para minimizar las perdidas por plagas y enfermedades, pero es necesario buscar alternativas sostenibles de fertilización, por ello el objetivo de esta investigación fue hacer una revisión del uso de inoculación microbiana en la producción de lechuga. Para ello se hizo. una revisión sistemática dónde se analizaron 180 artículos en bases de datos de revistas de alto impacto como Scopus, Latindex, Scielo, Redalyc y Google académico de los cuales se seleccionaron 23 que destacan las ventajas de la inoculación con microorganismos en la nutrición vegetal de la lechuga. Los resultados revelan que los microorganismos más promisorias para ser usados como inoculantes son las microalgas, bacterias fijadoras de nitrógeno, solubilizadoras de fosforo y promotoras de crecimiento, las cuales aportan los nutrientes para alcanzar un óptimo rendimientos, produciendo un menor daño fitosanitarios reduciendo los costos, aumentando los rendimiento y garantizan la inocuidad de la lechuga, por lo cual esta es una alternativa de bajo costo y rentable para ser usada en la producción de lechuga bajo ambientes hidropónicos.
El profesor como Agente Motivador en el Proceso de Aprendizaje del Idioma Inglés en Entornos Universitarios
Authors: Brenes Zúñiga Jorge , Moya Bello Maria Fernanda , Montero Cortes Tobias , Ruiz Sequeira Carlos Gerardo
Published: December 2024

Introducción: Se propone un artículo derivado de una investigación, el cual explora el rol del profesor como un agente motivador en los procesos de enseñanza y aprendizaje del idioma inglés en contextos universitarios. Objetivo: El objetivo de este artículo fue analizar la influencia del profesor en la motivación de los estudiantes hacia el aprendizaje del idioma inglés en entornos universitarios. Metodología: para llevar a cabo este estudio cualitativo, se tomó una muestra de 84 estudiantes de la Universidad Nacional de Costa Rica (UNA), campus Liberia, los cuales completaron una encuesta con preguntas cerradas y abiertas. Resultados: Se encontró que el profesor universitario influye en la motivación del estudiante hacia el idioma inglés gracias a elementos relacionados a la metodología de clase y su personalidad de apertura. Conclusiones: Desde la perspectiva de los estudiantes el profesor universitario como facilitador es una pieza clave del proceso de aprendizaje del idioma inglés que tiene una gran incidencia en su nivel de motivación para aprender el mismo.
La Relación de Factores Protectores de la Salud Mental y el Pensamiento Crítico en Universitarios: Un Caso de Estudio en Huancavelica- Perú
Authors: Alva Leda Javier , Mendoza Vilcahuaman Jenny , Leyva Yataco Leonardo , Guerra Olivares Tula Susana , Cárdenas Pineda Lina Yubana , Chamorro Quijano Sario Angel , Muñoz De La Torre Rossibel Juana
Published: December 2024

La investigación tiene por objetivo determinar la relación entre los factores protectores de la salud mental positiva y el pensamiento crítico en estudiantes de la Universidad Nacional de Huancavelica. La metodología aplicada la investigación es de nivel descriptivo con enfoque cuantitativo y diseño descriptivo correlacional. La población corresponde a los estudiantes de la Universidad Nacional de Huancavelica y la muestra se obtuvo mediante el muestreo no probabilístico accidental incluyendo estudiantes de la mayoría de las Facultades. Los instrumentos utilizados para la recolección de datos fueron la Prueba de Pensamiento Crítico y la Escala de Factores Protectores de Salud Mental, la misma que fue adaptada para efectos de la presente investigación como resultados significativos se obtuvo que 84% de estudiantes con antecedentes familiares de ansiedad y/o depresión y el 34.4% posee una salud mental inadecuada. Respecto al pensamiento crítico, el 37.1% de los estudiantes, se ubica en el nivel bajo, el 34.1% en el nivel medio. Concluyendo que existe relación directa entre los factores protectores de la salud mental positiva y el pensamiento crítico en estudiantes de nivel universitario. Así mismo, se encontró relación directa entre el factor de integración de la salud mental positiva y el pensamiento crítico, entre el factor de vida universitaria y el pensamiento crítico.
The Utilisation of Coconut Shell (Cocos Nucifera) as a Partial Aggregate Replacement on the Properties of Concrete in Terms of Thermal Behaviour
Authors: Leman Alif Syazani , Shahidan Shahiron , Md. Naziri Ahmad Shahrir , Tayeh Bassam
Published: December 2024

Green environments or environmentally friendly buildings have increasingly captured the attention of researchers. This concept involves the reuse of waste materials to enhance or create new products. Accordingly, this study aims to investigate the utilization of fine coconut shell (FCS) as a partial substitute for sand, focusing on its applications with varying percentages from 10% to 100% on the properties of concrete in terms of thermal conductivity. The initial phase of the research concentrated on characterizing the properties of fine coconut shell and sand using methods such as sieve analysis, laser diffraction sieve technique, specific gravity tests, bulk density measurements, scanning electron microscopy (SEM), and water absorption tests. Subsequently, the mechanical properties of fine coconut shell in concrete, replacing sand partially, were evaluated through slump tests, compressive strength tests, flexural strength tests, modulus of elasticity tests, splitting tensile strength tests, water absorption tests, and water permeability tests. The second phase of the study focused on exploring the low thermal conductivity applications of fine coconut shell concrete, assessed through thermal conductivity tests (k-value) and thermal resistance (r-value) calculations. Upon collecting data, a relationship analysis was conducted to determine the optimal percentage of fine coconut shell replacement. Using this optimal percentage, wall panels were constructed to assess heat penetration into buildings, and the temperature data was validated using Autodesk Ecotect software. The findings indicated that fine coconut shell particles were finer (≤ 600 μm) compared to sand (4.25 mm - 150 μm). In terms of mechanical properties, concrete containing fine coconut shell as a partial replacement for fine aggregate demonstrated superior performance to normal concrete. Moreover, the thermal conductivity values of specimens containing coconut shell were lower than those of normal concrete. In conclusion, the study determined that replacing 50% of fine aggregate with fine coconut shell was optimal, meeting British Standard requirements and aligning with previous research findings.
Comparative Analysis of Aerodynamic Drag Between Long Tail and Short Tail Aero Helmets Through Wind Tunnel Testing
Authors: Abdullah Mohd Na'im , Mustapha Faizal , Mat Daud Siti Zubaidah
Published: December 2024

Aerodynamic drag is a critical factor influencing the performance of competitive cyclists, particularly in time-trial events, where reducing drag can significantly improve speed and efficiency. Helmets are an essential component of aerodynamic gear, and their design plays a vital role in minimizing air resistance. However, the effect of different helmet shapes and head positions on aerodynamic performance has not been thoroughly examined. This study aims to investigate and compare the aerodynamic performance of long-tail (LT) and short-tail (ST) aero helmets, along with the Kabuto Aero SL, under varying pitch angles and speeds. Wind tunnel testing was conducted using an adult-sized mannequin head, with helmets evaluated at pitch angles ranging from 15° to 45° and wind speeds of 5 to 15 m/s. The results showed that the LT Aero helmet achieved the best performance at lower pitch angles (15°), while the ST Aero helmet performed optimally at a 25° pitch angle. The Kabuto Aero SL helmet demonstrated superior performance at low pitch positions, particularly at 15°. These findings highlight the importance of helmet design and head positioning in optimizing aerodynamic efficiency for cyclists in competitive conditions.
Hydrolysis Process of Red Sorghum Grains for Producing Bioethanol
Authors: Rosadi Dadang , Ghofar Abdul , Rosjidi Mochamad , Mustafa Anwar , Sitorus Rudy Surya , Saputra Hens , Hasanah Nuur Faridatun , Santoso Eko , Baruji Teguh , Wahyuono Bonny Agung , Umiati Umiati , Mufti Ayi , Pradiva Molina Indah , Rustiaty Banon , Widiyanti Palupi Tri , Zubair Anas , Mel Maizirwan
Published: December 2024

As part of the effort to continuously enhance the development and utilization of bioenergy/bioethanol and to ensure its sustainability, using sorghum as a raw material for bioethanol production requires a study to obtain efficient hydrolysis conditions and achieve optimal bioethanol conversion. This research method is divided into two main parts: samples with pretreatment and without pretreatment. The pretreatments used NaOH solution (0.05% and 0.1%); soaking temperatures at 35,40 and 45oC; and soaking time at 30, 60, 90, and 120 minutes. The liquefaction and saccharification results with pretreatment showed a greater decrease in viscosity values after both liquefaction and saccharification, and the RS and DE results also demonstrated an increasing trend compared to samples without pretreatment. It is due to the presence of protein bodies in sorghum that inhibited hydrolysis without applying the pretreatment. The best result on the reduced sugar (RS) value achieved was 10.43%, and the DE value was 67.90%. Thus, the optimum operational condition was achieved with a sample with 0.05% NaOH soaking for 90 minutes at 45°C (A9). Subsequently, fermentation was carried out on sample A9 with pretreatment and sample without pretreatment (A0/B0). The alcohol obtained from fermentation with pretreatment was 9.5%, with a fermentation ratio (FR) of 86.97%. Meanwhile, the alcohol yield from fermentation for the sample without pretreatment was 8.9%, with an FR of 83.02%.
Numerical Investigation of a Heat Exchanger with Annular Fins for Cryocooler Application
Authors: Chakala Damu , Sathyanarayana Reddy Battrakuppa Narayana Reddy , Kuzhiveli Biju , Moudghalya Sumukh , Nerale Mrunal Manjunath , Halealine Narasimha Nagendra
Published: December 2024

In this paper, the heat transfer characteristics of a typical hot heat exchanger used in pulse tube cryocooler have been numerically investigated. The numerical simulation is performed with the help of the commercial tool Ansys Fluent® to study the effect of different shapes and sizes of fins on the rate of heat transfer. The major parameters of the analysis include the diameter and pitch of the fins, the oscillating temperature at the inlet and outlet of the heat exchanger, and its operating frequency. A numerical investigation is conducted for the annular fin to illustrate its effect on the rate of heat transfer by calculating its Nusselt number and heat transfer coefficient. The effect of with fin and without fin on temperature and pressure variations has been studied for different angles in a cycle. The vortex development mechanisms within the gap between fins have been analyzed and compared with the vortex development mechanisms without fin. Results will be helpful for better design of heat exchangers for cryocoolers.
Experimental Investigation of Temperature Homogeneity and Peak Temperature in a Battery Pack of Cylindrical Li-ion Cells Under Free and Forced Convection
Authors: Singh Manmeet , Dogra Sudhanshu , Jilte Ravindra
Published: December 2024

Electrical vehicles (EVs) are emerging as a suitable replacement for conventional IC engine-based automobiles because of their environmental friendliness. An EV is powered by a rechargeable battery pack usually made of Lithium-ion batteries and these batteries generate heat during their operation cycle due to exothermic reactions and ohmic effect. Thermal management of batteries is important for their safe operation and optimum lifespan. In this paper, a comparative analysis of temperature homogeneity, peak temperature and average temperature of battery pack is presented between free and forced convection-based Battery Thermal Management System (BTMS). Cells that are at higher temperature than average temperature of battery pack are more liable to fail earlier as compared to other cells of pack. Present research focuses on finding such critical cells in a battery pack consisting of twelve lithium-ion batteries. The battery pack is discharged at three different rates: 1C, 2C and 3C, and temperature of each cell is measured at regular intervals during the discharge process. The experimental results from present study revealed that free convection is better at maintaining temperature homogeneity, but peak temperatures were above 50 ̊C. Forced convection based BTMS was able to keep peak temperatures below 50˚C at 1C discharge rate but temperature homogeneity was not maintained within ideal limits of 5˚C. At higher discharge rates, the performance of both free convection and forced convection based BTMS is not within acceptable limits. Critical cells were identified to get better insight into limitations of conventional cooling systems so that better layout of battery module and better alternative methods of battery pack cooling can be developed.
Assessment of Photovoltaic Thermal Efficiency using Phase Change Material and Water-Channel Collector with T-Fin Design
Authors: Zi Qing Low , Mohd Rosli Mohd Afzanizam , Salimen Nurfarhana , Abdul Rashid Azrin Hani , Herawan Safarudin Gazali
Published: December 2024

Photovoltaic thermal systems, also known as hybrid solar panels, combine photovoltaic and solar thermal components to generate both electrical and heat energy from the sun. Despite solar energy has significant potential, conventional photovoltaic systems suffer from low efficiencies due to the wasted heat energy and high working temperature. This research aims to develop and examine the efficiency of a photovoltaic thermal system integrated with commercial phase change material (PCM) using copper T-fin absorber to increase solar energy conversion efficiency. The research involved fabricating aluminium packets for commercial PCM, filling fabricated packets into a developed photovoltaic thermal system with T-fin absorber, and conducting final experiments under three different water flow rates for each of three different irradiance levels under solar simulator with 30 minutes run for each test. The final experiment assessed temperature difference, electrical efficiency, thermal efficiency, and overall efficiency. At 800 W/m² and 90 l/h, the highest temperature drop was 11.20°C. The highest electrical efficiency of 8.0% was achieved at 800 W/m2 and 90 l/h. The highest thermal efficiency was 72.5% at 400 W/m² and 90 l/h. The highest overall efficiency of 79.8% at 400 W/m² and 90 l/h for the T-fin absorber. These results concluded the enhanced heat transfer capability and contribution to higher overall system efficiency after integrated commercial PCM and T-fin absorber.
Tahap Kompetensi Pelajar Program Ijazah Sarjana Muda Perguruan (PISMP) Ambilan Jun 2019 Institut Pendidikan Guru Kampus Ilmu Khas
Authors: Yakob Faridah , Ahmad Azlina , LEE LEH HONG
Published: December 2024

Standard Guru Malaysia merupakan piawaian yang menggariskan kompetensi professional yang patut dicapai oleh guru, serta keperluan yang patut disediakan oleh agensi dan institusi latihan perguruan bagi membantu guru-guru mencapai tahap kompetensi yang ditetapkan.  Kajian ini dijalankan untuk meninjau tahap kompetensi pelajar PISMP Ambilan Jun 2019 yang baharu menamatkan pengajian mereka selama lima (5) tahun di IPG Kampus Ilmu Khas (IPGKIK), Kuala Lumpur. Kajian ini menggunakan pendekatan kuantitatif iaitu dengan menggunakan Senarai Semak Kompetensi Diri (SSKD) SGM 2.0. Dimensi Kompetensi dalam Kerangka SGM 2.0 menjadi rujukan utama dalam kajian ini. Dapatan kajian menunjukkan bahawa secara keseluruhannya tahap kompetensi semua domain SGM 2.0 pelajar ini berada pada min=2.47 (SP=0.69). Keempat-empat domain mencapai standard kompetensi SGM 2.0, iaitu min bagi domain orientasi ilmu adalah 2.44, domain instruksional adalah 2.45, domain pelibatan komuniti adalah 2.48 dan domain kualiti peribadi adalah 2.52. Walaupun semua domain mencapai standard kompetensi SGM 2.0 bermakna mereka mempunyai kekuatan yang memenuhi keperluan minimum tetapi masih perlu mempertingkatkan aspek profesionalisme mereka. Pengkaji mencadangkan agar pelajar-pelajar ini mempunyai sikap keterbukaan untuk menerima perubahan dasar seperti MADANI, tujuh (7) teras utama KPM, perubahan tatakelola serta cabaran global yang lain. Pengkaji juga mencadangkan agar IPGKIK merancang dan membangunkan program atau aktiviti yang mengambilkira cabaran baharu ini untuk membangunkan graduan IPGKIK yang dapat menangani cabaran baharu, karakter guru yang baik serta kompeten dan berjiwa pendidik.
A Study on Online Learning For UTHM Students
Authors: Sazeli Zul Afiq , Saruddin Nursuhaili , Mat Idris Nurul Syafika Adila
Published: December 2024

Online meetings are arguably the most widely used method since the Coronavirus pandemic hit the world among office workers to do such as meetings and because of students may face several challenges throughout the e-learning process held. The main objective of this research is to explore the factors that affect students’ satisfaction regarding the online classes. All the 100 respondents from UTHM Pagoh students were taken as representing the population set in UTHM Pagoh students. This research is qualitative data and were analysed by using IBM SPPS Statistic to find the mean, standard deviation, percentage, and frequency with the data collected consists of four sections which are demographic info, the factors, the students’ attitudes, and the ways to make online learning more interesting with five questions each section. The results revealed that, the factor that most contribute to student dissatisfaction in online learning is the problem of networks with 4.16 as the mean. Most students' attitude towards online learning is their lack of interest and involvement during classes with 3.69 as the mean and 4.43 mean for the way to make online classes more interesting is with lecturers can use some creative tools to teach.
Transforming Technical Education: The Effect of the AR-MicroC Augmented Reality Learning Module on Students Achievement
Authors: Othman Farah Waheda , Mat Nashir Irdayanti , Mat Nor Muhamad Asrul Affendi , Che Mansor Marziah , Kleebrung Arthit
Published: December 2024

Technological advances driven by Industrial Revolution 4.0 (IR4.0) have introduced digital technologies such as Augmented Reality (AR) that are changing the approach to learning. This study aims to evaluate the effectiveness of using the AR-MicroC Augmented Reality Learning Module in improving student achievement in the Information Technology Certificate program at the Malaysian Community College. A quantitative approach with a quasi-experimental design was used, involving 66 students who were divided into two groups: a treatment group (n=32) who used the AR-MicroC module and a control group (n=34) who followed conventional teaching methods. Data was collected through pre-test and post-test for the Introduction to Internet of Things (IoT) course.  The study lasted for five weeks, involving pre-test, teaching, and post-test phases. Data analysis using independent sample t-test and paired sample t-test showed a significant difference in achievement between the two groups. The results of the study prove that the AR-MicroC module is effective in improving student performance. The implications of this study suggest the use of the AR-MicroC Augmented Reality Learning Module as an innovative alternative teaching tool in the learning process, especially in transforming technical education.
ТАК СКАЗАЛ ЭЛОХИМ. МОЖЕТ ЛИ ЧЕЛОВЕК МЫСЛИТЬ КАК СОЗДАТЕЛЬ
Authors: Ротенфельд Юрий , Даренский Виталий Юрьевич , Закунов Юрий Александрович
Published: December 2024

В состоящей из ряда статей книге показано принципиально новое мышление — мышление сравнительными понятиями. Необычность в том, что я увидел связь между Божьим Словом, взятыми у Канта понятиями «практического и чистого разума» и естественнонаучным мышлением, что возвращает веру в Творца к ее истокам — на пути Божьего Разума и Мудрости. Книга позволила по-новому посмотреть на многие философские проблемы и Библейские тайны, раскрыла их внутренний смысл, невидимый с позиций общепринятого мышления.
ИСПОЛЬЗОВАНИЕ ГЕОИНФОРМАЦИОННОЙ СИСТЕМЫ ДЛЯ АНАЛИЗА ДАННЫХ, ПРИНЯТИЯ УПРАВЛЕНЧЕСКИХ РЕШЕНИЙ В СИСТЕМЕ ЗДРАВООХРАНЕНИЯ И УПРАВЛЕНИЯ ОБЩЕСТВЕННЫМ ЗДОРОВЬЕМ (НА ПРИМЕРЕ ГЕОИНФОРМАЦИОННОЙ СИСТЕМЫ, РАЗРАБОТАННОЙ В ФГБУ «НМИЦ ТПМ» МИНЗДРАВА РОССИИ)
Authors: Драпкина О. М. , Орлов С. А. , Шепель Р. Н. , Нестерович Е. В. , Кицул Игорь Сергеевич , Лебедев Георгий Станиславович
Published: December 2024

Учебно-методическое пособие содержит описание основных направлений использования геоинформационных систем в здравоохранении, функциональных задач и технологий, позволяющих проводить картографическую оценку статических и динамических показателей, характеризующих общественное здоровье и деятельность медицинских организаций, а также в целом системы здравоохранения. На примере геоинформационной системы корпоративных и муниципальных программ укрепления здоровья, разработанной в ФГБУ «НМИЦ ТПМ» Минздрава России, продемонстрированы аналитические возможности платформы по оценке реализации профилактических мероприятий, корпоративных программ укрепления здоровья в трудовых коллективах, муниципальных программ укрепления общественного здоровья в субъектах Российской Федерации, а также возможности решения иных задач, актуальных для системы здравоохранения. Учебно-методическое пособие предназначено для специалистов в области организации здравоохранения и общественного здоровья и медицинской кибернетики, слушателей программ дополнительного профессионального образования по специальности «Организация здравоохранения и общественное здоровье», постдипломного образования врачей по специальностям «Организация здравоохранения и общественное здоровье» и «Медицинская кибернетика», специалистов медицинских информационно-аналитических центров и органов государственной власти субъектов Российской Федерации в сфере охраны здоровья.