bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparative Activity of Chlonisol and Lomustinе in Mice with Intraorbital Transplant of Ehrlich Carcinoma
Authors: Александров Валерий Анатольевич , Змитриченко Юлия Геннадьевна , Стуков Александр Николаевич , Харитонова Наталья Николаевна , Беляева Олеся Александровна , Суслов Дмитрий Николаевич , Нюганен Анна Олеговна , Точильников Григорий Викторович , Латипова Дилором Хамидовна , Семиглазова Татьяна Юрьевна
Published: May 2024

Цель исследования. Моделировать опухолевое поражение глазницы путем внутриглазничной трансплантации карциномы Эрлиха (КЭ) у мышей и оценить на этой модели активность отечественного соединения 2-[3-(2-хлорэтил)-3-нитрозоуреидо]-1,3-пропандиола (хлонизола) в сравнении с его структурным аналогом ломустином.
Материал и методы. Для моделирования внутриглазничных опухолей у 40 мышей BALB/c использовали клетки стандартного штамма КЭ (1 × 106 клеток в 0,05 мл стерильного 0,9 % раствора натрия хлорида), которые вводили c помощью тонкой иглы трансконъюнктивально в полость правой глазницы над ее нижней стенкой. При отработке метода (на 10 мышах) показано, что опухоль быстро растет, разрушая структуры, и распространяется за пределы глазницы. Другие мыши были разделены на три группы (по 10 животных) с однократным введением: ломустина (50 мг/кг, per os), хлонизола (20 мг/кг, в/б) или растворителя (контроль). Противоопухолевая активность препаратов оценивалась по торможению роста трансплантированной опухоли и выживаемости животных.
Результаты. Оба препарата ингибировали рост опухоли: ломустин — на 59-72 %, а хлонизол — на 95-100 % в сравнении с контролем (р < 0,01-0,0001). Ингибирующая активность хлонизола была статистически значимо выше, чем у ломустина. Медиана продолжительности жизни при лечении ломустином увеличилась в сравнении с контролем на 28 % (р = 0,006), а при лечении хлонизолом — на 212 % (р < 0,0001). При сравнении эффективности препаратов этот показатель был выше после применения хлонизола, чем ломустина на 144 % (р = 0,0005). Половина мышей в группе с хлонизолом прожили без рецидивов свыше 90 дней, что можно рассматривать как излечение.
Заключение. У мышей с трансплатированной в глазницу КЭ противоопухолевая активность соединения 2-[3-(2-хлорэтил)-3-нитрозоуреидо]-1,3-пропандиола (хлонизола) статистически значимо выше, чем у его структурного аналога — препарата ломустина.
Engagement en situation de cours ou de travaux dirigés : impacts d’un dispositif de classe inversée en licence de sciences de la vie
Authors: Agnès François , Moyon Marine , Locker Morgane
Published: May 2024

Nous constatons chez les étudiant·es de 1er cycle universitaire en sciences de la vie une passivité en cours comme en travaux dirigés (TD) et un apprentissage trop surfacique. Dans le but de les engager davantage et stimuler un apprentissage en profondeur, nous avons déployé un dispositif de classe inversée dans lequel les exposés magistraux ont été remplacés par un apprentissage du cours en autonomie (distanciel asynchrone), et les TD modifiés pour introduire du travail collaboratif. Nous avons ensuite interrogé les effets de ce dispositif sur l’engagement de nos étudiant·es. Afin de mener une analyse comparative contrôlée, le dispositif a été testé sur la moitié de la promotion (cohorte d’intérêt ; n=137) ; l’autre moitié a reçu un enseignement au format traditionnel (cohorte contrôle ; n=180). L’engagement comportemental, émotionnel, agentique et cognitif des étudiants a été mesuré via un questionnaire auto-rapporté, en considérant l’unité d’enseignement dans son ensemble, ou en distinguant deux situations très différentes : le cours et les TD. Nos données révèlent un bénéfice global du dispositif sur l’engagement émotionnel et cognitif des étudiant·es. En situation d’apprentissage de cours, l’engagement est accru dans les quatre dimensions interrogées. En TD, l’impact positif ne porte que sur la dimension émotionnelle.
Pengaruh Layanan Frontliner dan Relationship Marketing Terhadap Loyalitas Nasabah pada Bank Muamalat Indonesia Kantor Cabang Pembantu Madiun
Authors: Imanurrovi Fithrotul , Himmati Risdiana
Published: May 2024

Persaingan antara bank syariah dan bank konvensional dalam mengumpulkan nasabah untuk menggunakan produknya semakin ketat. Bank syariah, khususnya Bank Muamalat Indonesia KCP Madiun juga terus berupaya meningkatkan layanannya untuk dapat mempertahankan nasabah. Bagi Bank Muamalat Indonesia KCP Madiun, keberadaan nasabah yang setia dan loyal sangat penting karena dapat menggambarkan besarnya profitabilitas dan citra perusahaan dimata publik. Dengan kualitas pelayanan yang baik, kepercayaan yang penuh dari nasabah, komitmen yang erat, komunikasi yang baik, dan penanganan masalah yang ramah dan tepat, tentunya akan membuat Bank Muamalat Indonesia KCP Madiun akan semakin disukai oleh nasabahnya. Penelitian ini bertujuan untuk (1) mengetahui pengaruh layanan frontliner terhadap loyalitas nasabah pada Bank Muamalat Indonesia KCP Madiun. (2) mengetahui pengaruh relationship marketing terhadap loyalitas nasabah pada Bank Muamalat Indonesia KCP Madiun. (3) mengetahui pengaruh layanan frontliner, dan relationship marketing secara bersama-sama terhadap loyalitas nasabah pada Bank Muamalat Indonesia KCP Madiun. Metode penelitian ini bersifat kuantitatif, dengan jenis penelitian asosiatif. Teknik pengumpulan data menggunakan kuesioner. Hasil penelitian ini dapat disimpulkan bahwa (1) layanan frontliner berpengaruh positif dan tidak signifikan terhadap loyalitas nasabah Bank Muamalat Indonesia KCP Madiun karena nilai layanan frontliner lebih kecil dari nilai t tabel yaitu 1,383 < 1,693 dan nilai signifikansi 0,176 > 0,05, (2) relationship marketing berpengaruh positif dan signifikan terhadap loyalitas nasabah Bank Muamalat Indonesia KCP Madiun dengan nilai relationship marketing lebih besar dari nilai t tabel yaitu 2,742 > 1,693, dan nilai signifikansi 0,009 < 0,05, (3) layanan frontliner dan relationship marketing secara bersama-sama berpengaruh positif dan signifikan terhadap loyalitas nasabah Bank Muamalat Indonesia KCP Madiun dengan Fhitung sebesar 10,394 > Ftabel 3,30 dan nilai signifikansi 0,000332 < 0,05.
Pengaruh Faktor Fundamental Ekonomi Makro Terhadap Harga Saham Di Jakarta Islamic Index (JII) Tahun 2019-2022
Authors: Windytiafitli Rizka
Published: May 2024

Pasar modal memiliki pernanan penting serta merupakan tolak ukur kemajuan perekonomian pada suatu negera. Pasar modal dijadikan sebagai wadah atau sarana bagi investor dalam berinvestasi jangka panjang. Jakarta Islamic Indeks (JII) merupakan indeks yang digunakan sebagai tolak ukur untuk mengukur kinerja suatu investasi pada saham yang berprinsip syariah. Dalam investasi saham seorang investor memperhatikan faktor-faktor yang mempengaruhi harga saham yang akan dibelinya. Terdapat faktor fundamental ekonomi makro yang diduga berpengaruh terhadap harga saham. Penelitian ini bertujuan untuk pengaruh faktor apa saja yang mempengaruhi faktor fundamnetal ekonomi makro terhadap harga saham di Jakarta Islamic Index (JII). Peneliti membatasi masalah-masalah yang akan dibahas hanya pada inflasi, suku bunga, kurs, jumlah uang beredar dan produk domestik bruto (PDB). Penelitian ini menggunakan pendekatan statistik data panel yang diolah melalui E-Views 12 yaitu analisis metode kuantitatif. Jumlah data sebanyak 336 data. Sampel yang digunakan merupakan beberapa saham yang ada dalam Jakarta Islamic Index (jii) 30 yaitu PT Adaro Energy Tbk (ADRO), PT AKR Corporindo Tbk (AKRA), PT Indofood CBP Sukses Makmur Tbk (ICBP), PT Kalbe Farma Tbk (KLBF), PT Telkom Indonesia (Persero) Tbk (TLKM), PT United Tractors Tbk (UNTR), PT Unilever Indonesia Tbk (UNVR), data diambil dari tahun 2019-2022 berupa data bulanan. Hasil penelitian secara parsial diperoleh inflasi dan suku bunga tidak berpengaruh signifikan dengan nilai signifikasi masing-masing 0,1033 > 0.05 dan 0,7971 > 0,05, sedangkan kurs (nilai signifikansinya 0,0004 < 0,05), jumlah uang beredar (nilai signifikansinya 0,0128 < 0, 05) dan PDB (nilai signifikansinya 0,0406 < 0,05) berpengaruh terhadap harga saham di JII dengan nilai. Secara simultan kelima variabel tersebut memilki pengaruh terhadap harga saham di JII.
Strengthening Community-Based Health and Human Services in the Shadow of Structural Inequality: A Critical Case Study of the Collective Impact Model
Authors: Dolamore Stephanie , Kline Angela
Published: May 2024

Many funders of health and human service organizations require collaborative networks that work together to achieve community-wide outcomes. One such model is Collective Impact, an approach that has gained support as a way to promote collaboration and track progress. However, the limitations of Collective Impact imposed on small or community-led organizations may be crippling, given the technical and human capital needed to sustain demands for data collection and reporting. As a result, it is problematic that Collective Impact, which aims to enhance accountability and effectiveness in the decision-making process, is also creating unintended bias and inequity in funding relationships. The purpose of this research is to identify the challenges of using the Collective Impact model within an urban environment plagued by historical and on-going structural inequalities. This is accomplished through a critical case study of a large funder of health and human service organizations in an urban region of the mid-Atlantic. Analysis of primary and secondary data reveal disparate funding to large nonprofit organizations, despite organizational goals for equitable and inclusive funding across the nonprofit sector as part of the Collective Impact model. Consequently, the funding patterns represent a perpetuation of the status quo with problematic implications given the context of the region's racial structural inequalities and organizational goals. This article concludes with recommendations for more inclusive approaches for funders working with small and community-based health and human service organizations.
Participants not Observers: Involving Beneficiaries as Co-assessors in Performance Analysis
Authors: Campbell David , Lambright Kristina
Published: May 2024

This commentary addresses the limited attention researchers and practitioners have given to the role service beneficiaries can and do play in performance analysis in health and human service organizations. We present a six-element framework for understanding that role at the individual, program and system level. The framework contrasts approaches that treat beneficiaries as passive versus active participants in performance analysis. We apply the framework to an imagined disability services organization. Future research should assess beneficiary engagement in performance analysis more systematically, including case studies, surveys of practice, and assessments of the effectiveness of these different approaches.
Make Hay While the Sun Shines: How Community-Based Nonprofit Organizations Cultivate Refugees’ Social Capital and Disaster Resilience
Authors: Xie Ming , Chen Li
Published: May 2024

This article examines community-based nonprofit organizations’ (CBOs') perspectives and practices regarding cultivating refugees’ disaster resilience. Adopting the theoretical framework of structural and cognitive social capital, we conducted in-depth interviews with leaders, staff members, and volunteers from refugee serving organizations. The research findings offer new insights into how CBOs help refugees obtain multiple forms of social capital and develop disaster resilience through education and training, resource mobilization, planning, and coordination. The research findings also reveal the flow of social capital exchange during the disaster resilience cultivation process. Similar CBOs can rely on our research findings to develop evidence-based programs and interventions to help culturally and linguistically diverse groups gain social capital and improve disaster resilience.
Organizational Resilience in Public Sector Organizations: Destination Management Organizations
Authors: Roach Charlene M. L. , Lewis-Cameron Acolla , Brown-Williams Tenisha
Published: May 2024

This qualitative exploratory study examined the effectiveness of organizational resilience processes adopted by Destination Management Organizations (DMOs) in Small Island Developing States (SIDS) during a global crisis. Study results showed that the DMOs’ organizational resilience engaged strategies fostered within a positive work climate (PWC) where dynamic processes of resilience capabilities emerged for Caribbean SIDS. These organizational resilience processes are complex and dynamic, with an interplay of both internal and external influences. The study offers practical and theoretical implications for public organizations in the service sector, where an integrated framework for engaging resilience strategies and capabilities processes emerges.
Navigating the Public Pension Landscape: An Examination of Asset Allocations
Authors: Hoang Trang , Nguyen Anh Tuan
Published: May 2024

The volatility of financial markets has highlighted the sensitivity of pension funding to pension investment management and the risk exposure of pension investment portfolios. In this study, we examine the asset allocations of U.S state and local governments defined-benefit plans to gain a better understanding on how those public pension plans manage their portfolio's risks. Using the data from over 90 public pension plans from 2007 to 2018, we found that pension plans that have a higher percentage of ex-official trustees, a higher average investment return, and a higher percentage pension contribution are less likely to invest in risky assets, whereas a plan that has a higher discount rate, a higher percentage of unionization among public sector employees, and a higher ratio of retirees to active employees is more likely to have higher shares of risky assets in their portfolio. Our results also suggest the herding effects that asset allocations of CalPERS and "last-year winner" plans are mimicked by other public pension plans. Given the strong correlation between a pension plan's status and its portfolio's risk profile, this study provides pension administrators and public managers with important insights to navigate the shift in asset allocations in the public pension landscape more effectively.
Does the Composition of Fiscal Deficit Matter for Economic Growth at the Sub-National levels? An Empirical Analysis for India
Authors: Behera Binod Kumar , Mallick Hrushikesh
Published: May 2024

In a federal system like India, the states’ fiscal performance shapes their growth trajectories. However, the empirical studies on the relationship between the composition of fiscal deficit and economic growth in India are limited. This study attempts to fill the gap by bifurcating the gross fiscal deficit into revenue deficit (RD) and effective fiscal deficit (EFD) for 14 major Indian states from 1980-81 to 2019-20. The findings reveal that RD, EFD, tax revenues, non-tax revenues, and inflation rates negatively impact the state's economic growth. Nevertheless, the effect of RD is relatively stronger than EFD. Additionally, private investment and Fiscal Responsibility Legislation (FRLs) have positive impacts. The interaction between the FRL dummy and EFD significantly impacts growth, but economic policy reform (EPR) does not affect growth. Further, the panel threshold fixed-effect model confirms the existence of a threshold effect of both RD and EFD, which implies that not all deficits have detrimental effects on growth. When deficit is constrained within the specific limits, it stimulates economic growth. However, surpassing the critical limits have an adverse impact on growth. These findings highlight the importance of prudent fiscal management and effective policy implementation for the economy's sustainable and inclusive economic development.
Municipal Performance in a Network Structure of Financial Operations and Service Provision in the New South Wales Local Government
Authors: Tran Carolyn-Thi Thanh Dung , Dollery Brian
Published: May 2024

Whereas the bulk of empirical research has employed nonparametric approaches to estimate efficiency in local government, especially Data Envelopment Analysis (DEA), in this paper we employ a Network DEA (NDEA) model to investigate the impact of the separate divisions of financial management and service provision on overall municipal efficiency. We apply this approach to the New South Wales (NSW) state local government system in Australia using a NDEA model for the four-year period of 2014/15 to 2017/18. We find that the overall efficiency of NSW local councils is statistically significantly associated with financial efficiency more strongly than with service efficiency, indicating that financial activities are relatively more important in terms of municipal performance. Using a fractional regression model in a second-stage NDEA model, we also establish that urban local councils are more efficient than their rural counterparts in terms of both financial efficiency and overall network efficiency.
Evaluación Formativa para el Logro de Competencias Profesionales de la Carrera de Educación Inicial
Authors: Linares Huaman John Abdul
Published: May 2024

Como objetivo general de la investigacion se considero determinar, si la evaluación formativa (E.F.) influye en la adquisición de competencias profesionales (CP); para recolectar, y analizar los resultados maneje un enfoque cuantitativo de diseño cuasiexperimental con una población censal y una muestra no probabilística de 48 estudiantes del V ciclo de la carrera de educación inicial (CEI) de un instituto pedagogico del Cusco, divididos en un grupo experimental (G.E. 24 personas) y un grupo de control (G.C. 24 Personas). Para recoger información relacionada a la variable dependiente se aplicó un cuestionario de 20 items para evidenciar el logro de (CP); el contenido del cuestionario fue aprobado por expertos, también se calculó el índice de fiabilidad del instrumento mediante el Alfa de Cronbach. La aplicación del programa (E.F) tuvo un efecto positivo en el logro de competencias profesionales (CP), lo que permitió analizar los resultados análogos a los objetivos generales y los objetivos específicos; para comparar con las conclusiones de la pre y post prueba tanto en el GC y GE, se utilizó tablas de frecuencias y gráficos estadísticos donde se pueden apreciar la mejora del 0% al 13% pruebas antes y después, donde el 13% y el 67% son excelentes.
Propuesta de Gobierno Electrónico para Mejorar el Proceso de Gestión Documental en el Municipio de Babahoyo 2023
Authors: Vera Preciado Faustino Urvano , Ortega Pérez Mercedes Angelica , Vera Preciado Jovita Gricelda , Melo Vera Milena Michelle
Published: May 2024

El proposito central del desarrollo del presente articulo es diseñar un modelo de propuesta de gobierno electrónico para la mejora del proceso de gestión documental en el municipio de Babahoyo, 2023. Esto se debe a la identificación de una mala gestión dentro de los procesos digitales de la entidad pública ocasionando que el desempeño organizacional se vea comprometido. Para efecto del mismo se desarrolló una metodología cualitativa con un diseño no experimental, transversal y descriptivo tomando como eje de análisis a la gestión de procesos documentales con un alfa de Cronbach de α = 0,984 y el gobierno electrónico con una confiabilidad bajo alfa de Cronbach de α = 0,985 así como sus dimensiones respectivamente. A nivel estadístico correlacional los resultados de la prueba de normalidad, revela que se cumple con el supuesto de normalidad al evidenciar valores de significancia mayores que 1l nivel de significancia establecido de 5%. Específicamente, el valor de significancia para la variable de gobierno electrónico fue de 0,200, y para la gestión de procesos documentales fue de 0,156. En base a los resultados del estudio se propuso un modelo de gestión y de recomendaciones a nivel de política de las gestiones documentales actuales por su bajo logro, resultando inminente la capacitación del personal y la intervención de la gerencia para mejorar el desempeño de sus trabajadores en el corto plazo.
Gamificación: Una Herramienta Innovadora para Enseñar Autovalores y Autovectores
Authors: Guanoluiza Carreño Jose , Mendoza Garcia Letty Annabelle , Aray Andrade Carlos Alberto , Montenegro Luis , Guerrero Alcívar Yandri
Published: May 2024

La gamificación, aplicada en la educación matemática, ha demostrado ser efectiva para mejorar la participación y el aprendizaje al integrar elementos de juego en la enseñanza de conceptos como las matrices. Esta estrategia no solo hace el aprendizaje más atractivo, sino que también facilita la comprensión al contextualizar los conceptos y proporcionar un entorno interactivo. Estudios previos, como el realizado en Mexicali y Cali, respaldan la efectividad de la gamificación en el mantenimiento de la motivación y el rendimiento de los estudiantes. La investigación se centró en explorar el impacto de la gamificación en la enseñanza de álgebra lineal en estudiantes universitarios. Se realizó un estudio práctico en dos grupos, uno de control y otro experimental, donde se aplicó la gamificación en el grupo experimental. Los resultados indicaron una mejora significativa en el rendimiento de los estudiantes que participaron en actividades gamificadas, lo que sugiere que esta estrategia puede ser valiosa para mejorar el proceso de enseñanza y aprendizaje de las matemáticas. La gamificación fortalece el proceso de enseñanza-aprendizaje al elevar la motivación de los estudiantes y facilitar la asimilación de conocimientos matemáticos, lo que la convierte en una herramienta pedagógica prometedora para las aulas contemporáneas.
Rendimiento Académico Post Pandemia en Estudiantes de la Básica Media
Authors: Guaján Tamayo Cristina Judith
Published: May 2024

La pandemia COVID-19 dejó grandes efectos en la vida de las personas; el ámbito educativo no fue la excepción, por tal razón el objetivo general de este estudio es analizar el nivel de rendimiento académico antes y después de la pandemia COVID-19, en estudiantes de la Educación General Básica del subnivel medio, además, se pretende identificar los factores más influyentes en el rendimiento académico. La metodología de esta investigación es cuantitativa, con un diseño no experimental transversal y con un alcance descriptivo, además, la muestra es de 278 estudiantes seleccionados mediante un muestreo no probabilístico por conveniencia. Se obtuvo como resultados que el rendimiento académico de los estudiantes, después de la pandemia tuvo una leve mejora, con una media de 8,41 en el año 2019 a 8,50 durante el año 2022, con relación a los factores que mayormente afectaron a los estudiantes fueron los familiares con un 89,9% y económicos 97,9% que ubicaron en niveles moderadamente influyentes y muy influyentes. En conclusión, el rendimiento académico postpandemia obtuvo una leve mejora, esto se debe a que pese a las consecuencias negativas que dejó la pandemia COVID-19, también se pudo evidenciar aspectos positivos como estudiantes autodidactas, mejora de competencias digitales, docentes mayormente capacitados en otras disciplinas.
Cáncer de Pulmón Revisión sobre los Alcances e Innovaciones en Clasificación, Manejo y Terapéutica
Authors: Theran León Juan Sebastián , Arenas Molina Carlos Enrique , Garzón Monsalve Daniela , Vergara Garcia Martin , Pabón Pérez Laura Isabel , Acuña Polo Francisco Luis , Layton Juan Nicolas , Mutis Daniel
Published: May 2024

Se proporciona una revisión exhaustiva sobre el cáncer de pulmón, abarcando desde su incidencia y clasificación hasta las innovaciones recientes en su manejo y tratamiento. El cáncer de pulmón es la neoplasia más común a nivel mundial, siendo el tercer tipo de cáncer más frecuente después del de mama y próstata. A pesar de una leve disminución en su incidencia general estandarizada por edad en los últimos 40 años, aún representa la mayor proporción de muertes relacionadas con cáncer. La revisión destaca la importancia de una estadificación precisa para determinar el tratamiento y pronóstico adecuados, señalando el avance en técnicas de imagen como la tomografía por emisión de positrones con tomografía computarizada (PET-CT) y el ultrasonido endobronquial (EBUS) para una mejor precisión en la estadificación. Se detalla la octava edición del sistema de clasificación TNM por sus siglas en inglés (Tumor, Nodo, Metástasis), utilizada desde enero de 2017, que proviene de la base de datos de la Asociación Internacional para el Estudio del Cáncer de Pulmón (IASLC).
Comparación de Juicio Político en Argentina y Ecuador: Procedimientos y Estabilidad Institucional
Authors: Sarmiento Llamuca Oscar Javier , Gonzalo Villalva David
Published: May 2024

En Argentina y Ecuador, la organización estatal se fundamenta en la división de poderes, asegurando autonomía entre el Ejecutivo, Legislativo y Judicial para garantizar estabilidad. La participación ciudadana es crucial como mecanismo de influencia y supervisión de la gestión pública. En ambas naciones, el juicio político puede dirigirse a altos funcionarios, como presidente, vicepresidente, ministros. En el caso específico de Argentina, los jueces también pueden ser sometidos a juicio político. El proceso inicia con una solicitud respaldada por al menos una cuarta parte de la Asamblea Nacional, enfocándose en violaciones a la Constitución y leyes federales en Argentina, y señalando violaciones a la Constitución Ecuatoriana como delitos contra la seguridad del Estado, concusión, cohecho, peculado, enriquecimiento ilícito, delitos de genocidio, tortura, desaparición forzada de personas, secuestro u homicidio por razones políticas o de conciencia. La investigación tiene como objetivo analizar y comparar los procedimientos de juicio político en ambos países, identificando similitudes y diferencias. Buscamos evaluar el impacto en la estabilidad institucional, examinando su influencia en las relaciones entre los poderes ejecutivo y legislativo, así como en la confianza ciudadana en las instituciones políticas.  Finalmente concluimos, que Ecuador y Argentina reconocen la participación ciudadana fundamental para la democracia. Ecuador destaca el papel activo de los ciudadanos a través del Consejo de Participación Ciudadana y Control Social, mientras que Argentina enfatiza la participación como derecho humano clave, contribuyendo a la apertura gubernamental. Respecto al juicio político, ambos reconocen su importancia como mecanismo de control, aunque con procesos distintos. Convergen en la necesidad de garantizar transparencia, rendición de cuentas y preservación de la integridad institucional en el ejercicio del poder político, reflejando una compleja interacción entre los poderes públicos y la ciudadanía.
Design of Industrial Mg-Rich Gypsum Waste with Concrete Waste Aggregate for Compressibility of Problematic Soil
Authors: Khairun Najihah Kamarudin  , Nurmunira Muhammad  , Abdoullah Namdar
Published: May 2024

Peats are often considered as a geotechnically problematic soil due to their poor behaviour and exhibit low soil properties like high compressibility, low shear strength, high fibre content, high moisture content and low bearing capacity values. Chemical stabilization was proven to be an effective method to stabilize the problematic soil. To date many additives like Ordinary Portland Cement, fly ash, lime and other alternatives binder has been applied to improve the compressive strength of the problematic soil. The study describes the effect of compressibility of improved peat soil using waste from industrial such as Mg-rich synthetic gypsum (MRSG) by-product and concrete waste aggregate from institution laboratory waste that can be used to improve the settlement problem of the Gebeng, Malaysia peat soil. The test was conducted at varying percentages of MRSG and concrete waste aggregate additives at 5%, 10%, 15%, and 20% by weight of the soil. The unconfined compression strength (UCS) test was determined to obtain the optimum strength ratio and the data revealed that the optimum ratio of gypsum and concrete waste required to enhance the properties of peat soil were at 5% gypsum, 10% concrete waste, and 10% concrete waste combined with 10% gypsum. Coefficient of consolidation, compression index, and coefficient of volume compressibility were obtained by oedometer test for both untreated and treated peat soil with additives. The compression ratio of the peat soil indicated the peat was very compressible and however, the compression ratio was observed at very slightly compressible once the soil stabilized with the optimum ratio mix. The results indicated that the combination of these two additives improved the compressibility characteristics of peat soil. This research will contribute to the fundamental behaviour of geotechnical problematic soil in Malaysia which results in sustainable approach by recycling the industrial and institutional waste, Mg-rich gypsum and concrete waste aggregate for soil improving instead of implementing soil removal replacing techniques.
Crushing Performances of Kenaf Fibre Reinforce Composite Tubes
Authors: Muhammad Fadhil Sahrom  , Muhamad Khairudin Awang  , Mohammad Sukri Mustapa  , Al Emran Ismail  , Jamiluddin Jaafar  , Omar Mohammed Al-Moayed  , Ali Kamil Kareem
Published: May 2024

The quest for sustainable and eco-friendly materials has led to a burgeoning interest in natural fibers as reinforcements in composite materials. Kenaf fiber, derived from the Hibiscus cannabinus plant, presents a promising avenue for enhancing the mechanical and energy absorption properties of composite tubes. This study focuses on the fabrication of composite tubes using a combination of kenaf fiber and epoxy resin. The composite tubes were then subjected to compressive testing to evaluate their energy absorption performances. The fabrication process involved the impregnation of kenaf fibre with epoxy resin, followed by winding and curing to form composite tubes. Different configurations of kenaf fiber content were utilized to investigate their impact on the structural integrity and energy absorption capabilities of the tubes. Compressive testing was conducted to assess the energy absorption behaviour under axial loading conditions. The results revealed that the incorporation of kenaf fiber significantly influenced the energy absorption capabilities of the composite tubes. Higher kenaf fiber content demonstrated improved energy absorption performance, showcasing the potential of kenaf fiber as an efficient energy-absorbing reinforcement. The findings of this study offer valuable insights into the use of sustainable and renewable resources, such as kenaf fiber, in enhancing the mechanical and energy absorption properties of composite structures, thereby contributing to the development of eco-friendly and high-performance materials.
Model Updating for Damage Identification: Leveraging Response Surface Methodology and Frequency Response Function Curvature
Authors: Nur Raihana Sukri  , Nurulakmar Abu Husain  , Syarifah Zyurina Nordin  , Aminudin Abu
Published: May 2024

The limitations of the classical finite element (FE) model updating-based damage identification method, described as having convergence problems and a high computing cost, served as a catalyst for this investigation. Unlike traditional FE models, response surface methodology (RSM) employs explicit mathematical functions to describe the input-response relationship, offering a clear and concise representation. However, the current application of RSM is restricted to a few responses and updating parameters, and unresolved issues persist, including symmetrical damage location and false damage detection. In this study, a new RSM approach is introduced, using FRF curvature as the response. The effectiveness of the proposed method is demonstrated through an experimental modal analysis of a free-free aluminium beam, employing four different Design of Experiment (DOE) techniques: a minimum-run resolution V (CCDmrv) design and a half-fractional (CCDhalf) design using Central Composite Design (CCD), Box-Behnken design (BBD), and D-optimal design. The research systematically evaluates and compares the performance of these DOE techniques in identifying damage. Overall, the results highlight the success of the RSM method, particularly CCDhalf, D-optimal and BBD, in effectively identifying damage.
Assessing the Negative Impact of Palm Oil Industry in Malaysia through a Systemic Method
Authors: Lau Kai Ming  , Faiz Mohd Turan  , Norazlianie Sazali
Published: May 2024

This research paper studies the life cycle assessment of palm oil production and the impact on the environment due to palm oil production. A life cycle assessment includes a life cycle inventory and a life cycle impact assessment. The life cycle inventory accounts for all the parameters of the milling process of palm oil production, such as kernels, shells, etc. The life cycle impact assessment includes all the impacts on the environment and human health, such as global warming, ecotoxicity, radiation, the ozone layer, and more. This research paper will also include the opportunity to overcome the impacts due to palm oil production.
Bond Model for High Calcium Fly Ash Geopolymer Concrete
Authors: Hamdi Abdulrahman  , Rahimah Muhamad  , Ahmad Azim Shukri  , Tariq Hassan Rasheed
Published: May 2024

Concrete industries and researchers have devoted great efforts to promoting sustainability in the construction sector. This includes finding innovative alternatives to OPC concrete to ensure environmental sustainability and prevent the depletion of natural resources. The present research explained the steps to develop a bond stress-slip model for high calcium fly ash (HCFA) geopolymer concrete based on the experimental results in the literature. This model is based on the concrete compressive strength (fc), concrete cover (Cc), and bar diameter (db), which are considered the most influential parameters on the bond response between the reinforcement and surrounding concrete. The regressed model shows a quite accurate prediction of the bond behaviour of HCFA, particularly those with high strength. The slight difference was attributed to the difficulty in identifying the exact values of Slips (δr1 and δr2).
Combined Effects of Banana Peels and Pith as Dual Natural Plant-Based Coagulants for Turbidity Removal
Authors: Esther Jebarani Rayer  , Mimi Suliza Muhamad  , Najeeha Mohd Apandi  , Norshuhaila Mohamed Sunar  , Roslinda Ali
Published: May 2024

Plant-based coagulants are foreseen for their coagulation ability in par with chemical coagulants owing to their biodegradability, availability, and effectiveness, while chemical coagulants are known to pose a threat to the environment due to generation of toxic sludge. This study investigates the performance of combined banana peels and banana pith as dual natural plant-based coagulants for turbidity removal. Banana peel powder solution (BPPS), banana pith juice (BPJ), and the combination of BPPS and BPJ were prepared via several steps, including drying, grinding, sieving, mixing, and crushing. The three types of coagulant produced were tested in a series of jar test experiments under the effects of different dosages, pH, and mixing speeds. The scanning electron microscopy images of banana pith show the formation of multicellular fibers, while irregular shapes and micro-rough crate-like pores are formed in banana peels, which contribute to the adherence of contaminants. Jar test results revealed the highest turbidity removal of 97.3, 98.0, and 99.1% was attained by using 60, 80, and 20:20 mg/L of banana peel powder solution, banana pith juice, and a combination of banana peel powder solution and banana pith juice coagulant dosage, respectively, with an optimum pH of 2, at a rapid mixing rate of 180 rpm (5 minutes) and a slow mixing of 60 rpm (20 minutes). Significantly, this removal was attributed to the presence of proteins and polysaccharides in both banana peels and pith. The findings suggested that banana peels and pith are applicable as natural plant-based coagulants for turbidity removal in the water treatment process and a potential substitute for conventional coagulants. In addition, the combined banana peels and banana pith coagulant prove to be more efficient than the existing banana peels and banana pith coagulant.
Effectiveness of Carica Papaya Dry Seed as Natural Coagulants in Wastewater Treatment Process
Authors: Muhammad Hakim Abdul Rahman Adrin  , Norhayati Ngadiman  , Noorul Hudai Abdullah  , Nadira Nursani Mohd Hamsani  , Nisya Nasharuddin  , Noor Nufaiha Omar
Published: May 2024

This study aims to assess the efficacy of Carica papaya-dried seeds as a natural coagulant in the wastewater treatment process. Using natural coagulants in water treatment provides a safer and more sustainable method. Insufficient research in this field hinders a thorough comprehension of the ideal circumstances, dosage, and potential impacts of Carica papaya dry seed coagulation on pollutant elimination in wastewater. Therefore, the investigation of the extraction procedure for coagulants derived from dried Carica papaya seeds is essential to establish a reliable and efficient method suitable for use in wastewater treatment facilities. The number of experiments were conducted to accomplish the objective of this study. The experiment utilised textile effluent from an industrial area in Parit Raja, Johor as the wastewater sample. The Carica papaya seeds were ground into a powder and then mixed with Sodium Chloride (NaCl) and distilled water to create a coagulant solution. COD, turbidity, pH, and settling depth were measured to assess the effectiveness of Carica papaya seeds in treating the effluent sample. At a Carica papaya seed coagulant dosage of 2.0 mL with a NaCl concentration of 1.5 M, the optimal COD reduction and turbidity removal efficacy were at 20.95 % and 23.00 %, respectively. This study shows that among 5 different concentration solvent, 1.5M NaCl is most optimum concentration condition demonstrated. Moreover, the research represents the significant potential of Carica papaya seed powder as a natural coagulant for treating wastewater that contains textile colouring agents. In conclusion, the research demonstrated that dried Carica papaya seeds possess the potential to serve as a natural coagulant in wastewater treatment procedures, thereby presenting a safer and more ecologically sustainable alternative. This study offers insights into the ideal conditions for utilising dried Carica papaya seeds as a natural coagulant for treating wastewater that contains textile colouring agents.
Extended Eddy-Viscosity Model to Rayleigh-Benard Convection in Cavity
Authors: Gunarjo Suryanto Budi  , Sasa Kenjeres
Published: May 2024

This paper presents a study of developing a numerical turbulent model in a cavity heated from below using eddy viscosity combined with elliptic relaxation approach. The model uses a set of differential equations that consist of kinetic energy, its dissipation, variance of temperature, velocity scale and elliptic relaxation parameter, which are solved using a finite-volume and Navier-Stokes solver. The unresolved stress tensors and heat flux vectors are modelled with an algebraic formula. The discretization method is carried out by CDS, or second-order differencing scheme, and LUDS, or second-order linear upwind scheme. The model is applied to the natural convection heated from below, known as Rayleigh-Benard convection, in a two-dimensional cavity with a height-to-length aspect ratio of 1:1.5, 1:4, and 1:8. The model has been validated using numerical data from DNS (direct numerical simulation) and experiments. The model produced similar results with both DNS and experiments. It was also shown that the model can visualize the main feature of turbulent convective flow in the enclosure for various aspect ratio.
Stretched Meshing in a 2D Computational Domain with Elbow Edges for CFD Applications
Authors: Gancang Saroja  , Sugeng Rianto  , Abdurrouf  , Setyawan Purnomo Sakti  , Muhammad Nurhuda
Published: May 2024

Mesh generation is critical for obtaining accurate and detailed solutions to mesh-based numerical problems, particularly when capturing specific information within a designated area of the domain. While structured meshes offer consistency, their uniform resolution limits their ability to achieve this. Mesh stretching offers a solution by introducing non-uniform element sizes based on an analytical relationship while preserving the original mesh structure. The objective of this study is to create a hybrid mesh model that leverages the strengths of both structured and stretched meshes. A 2D rectangle with elbow edges serves as the domain. To address the requirements of CFD applications, the domain is refined by increasing element density near the boundaries and corners. Skewness, aspect ratio, and element quality are then assessed to determine the overall mesh quality. The results demonstrate that stretching the structured mesh produced a mesh with quality that meets CFD domain standards.
Analytical Solution for MHD Casson Nanofluid Flow and Heat Transfer due to Stretching Sheet in Porous Medium
Authors: Wan Nura’in Nabilah Noranuar  , Ahmad Qushairi Mohamad  , Lim Yeou Jiann  , Sharidan Shafie  , Mohd Anuar Jamaludin
Published: May 2024

The feature of having a surface that can stretch has garnered attention in numerous industrial and engineering fields because of its advantages. Nevertheless, most fluid mechanics simulations for stretchable surfaces have predominantly relied on numerical solutions, with a notable lack of theoretical investigations into this matter. Consequently, the current research aims to contribute a theoretical exploration of heat transfer and boundary layer flow for Casson nanofluid on a linearly stretching sheet, considering the existence of porosity and magnetic field effects. Two distinct types of water-based nanofluids containing aluminium oxide and silicon dioxide are examined. By employing similarity transformations, the governing momentum and energy equations undergo transformation and subsequent analytical resolution using Laplace transformations. The resulting solutions are graphically presented to examine the influence of key parameters on temperature and velocity distribution. The analysis indicates that heat transfer is improved by the inclusion of nanoparticles, porosity, and a magnetic field. However, the velocity distribution slows down as a result of higher nanoparticle volume fraction, porosity, and magnetic field imposition.
Çin in Bir Kuşak Bir Yol Projesi: Kırgızistan Ekseni
Authors: Bilgin Fatma
Published: May 2024

1949 yılında kurulan Çin Halk Cumhuriyeti uzun süre katı bir sosyalizm uygulamasına maruz kalmıştır ancak bir süre sonra sistemin devamlılığının sağlamayacağı fark edilince 1978 yılında ‘Reform ve Dışa Açılma’ politikası adı altında bir plan izlenmiş ve bunun sonucunda da büyük bir ekonomik ilerleme kaydedilmiştir. Ekonomik büyüme hedeflerini ilerletmek için Çin devlet lideri Xi Jinping tarafından 2013 yılında Kazakistan’ın Nazarbayev Üniversite’nde açıklanan ‘Bir Kuşak Yol Projesi’ ( One Belt One Road - OBOR) dünyadaki ekonomik ve jeopolitik dengeleri değiştirmek üzere hazırlanmış önemli bir projedir. Bu çalışmanın amacı projenin önemli bir kısmını içinde bulunduran Orta Asya Coğrafyasında Çin’in ile bölge ülkelerinden olan Kırgızistan ile ilgili politik tutumları ve projeye destek veren yatırımları analiz etmektedir.
Takdim
Authors: Sakal Halil Burak , Özten Yıldız Merve
Published: May 2024

Dergimizin 2023 yılı Aralık sayısı, değerli okuyucularımızı altı farklı yazıyla buluşturmaktadır. Bu sayıda, biri Ortadoğu biri de Asya kıtasına odaklanan iki
araştırma makalesi, ikisi de Türkiye’nin ve aslında dünyanın en önemli gündem
maddelerinden olan Ukrayna Savaşı ve Çin’in Kuşak Yok Girişimi’nin Orta Asya’ya etkisi üzerine odaklanan iki görüş yazısı ve iki yayın değerlendirmesi yer almaktadır.

Yazarı Gülenay Göksenin Eren olan ilk araştırma makalesi, mezhepçi anlatıları ve onun stratejik değişimleri ekseninde 2006 yılı Lübnan-İsrail Savaşı sonrası İran-İsrail ilişkileri üzerine derinlemesine bir araştırmayı konu almaktadır. Ortadoğu’daki bölgesel güç dengesinin şekillenmesinde önemli bir rol oynayan mezhepsel ayrılıkların bölgedeki jeopolitik meselelerin nasıl şekillendiğini ortaya koymuştur. Özellikle 2006-2015 yılı arasındaki siyasi atmosferin İran-İsrail ilişkilerine etkisi incelenmiştir.

Hindistan ve Pakistan’ın Güney Asya Bölgesel İşbirliği Birliği (SAARC) ve Şanghay İşbirliği Örgütü (ŞİÖ) içerisinde sergiledikleri davranışları karşılaştırmalı olarak ele alan yazarlarımız Mohmad Maqbool Waggy ve Dr. Khalid Wasim Hassan, bu sayımızın ikinci araştırma makalesini kaleme almıştır. 2019'dan bu yana SAARC içinde birbirleriyle etkileşime girme konusunda isteksizlik gösteren bu iki devletin davranışları mahkum ikilemi kullanılarak analiz edilmeye çalışılmıştır.

Yazarı Samet İşbilen’e ait olan ilk görüş yazısı Ukrayna Savaşı’nı referans göstererek Moldova’yı ele almaktadır. Moldava’nın bir sonraki Ukrayna olup olmayacağı sorunsalına ışık tutmayı amaçlayan İşbilen Rusya bölge politikaları üzerine bir inceleme sunmuştur.

İkinci görüş yazısı ise Fatma Bilgin’ e aittir. Çin’in Kuşak Yol Girişimi’ni Kırgızistan ekseninde ele alan Bilgin, Çin’in Orta Asya politikalarını ortaya koyarken bölgedeki jeopolitik dengelerin ekonomik boyutuna da ışık tutmaktadır.

Yayın değerlendirmesi bölümündeki ilk değerlendirme Büşra Nur Adaş’a aittir. Adaş, Orhan Gafarlı’ya ait olan 2022 yılı Nika Yayınevi basımı olan “Rusya’nın Batı’dan Kopuşu” kitabının kapsamlı bir incelemesini yapmıştır. İkinci değerlendirme ise Fatma Kıyak’a ait olup Tasav Yayınevi’nden 2022 basımlı Ufuk Tok’un kaleme aldığı “Afganistandaki Gelişmeler: Uluslarası Aktörler ve Türkiye’nin Tutumu” kitabıdır.

Dergimizin bu sayısına çalışmalarını göndererek katkıda bulunmuş tüm yazarlara, bu eserlerin değerlendirme sürecinde emek harcayan tüm hakemlere
teşekkürü borç bilir; ulusal ve uluslararası akademik camiadan dergimize yönelik süregelen ilginin devamını ümit ederiz.
Evaluation of Non-COVID-19 CT Scan Findings Detected on CT Images Performed due to Suspected COVID-19 Pneumonia: A Retrospective Analysis of 6669 Cases
Authors: Özdemir Sevim , Turkay Rüştü , Atasoy Bahar , Can Tuba Selçuk , Yılmaz Behice Kaniye , İkizceli Türkan , Göçgün Nurdan
Published: May 2024

Aim: For about a few years, COVID-19 infection has continued to play a significant role in our lives as a serious threat and concern with the increase in the number of cases. During this pandemic stage, chest CT has been proven to have great importance for rapid and accurate diagnosis and a pivotal role in assisting the clinical management of patients with uncertain clinical scenarios.
Material and Methods: The present retrospective study aimed to inform the clinicians who referred chest CT and the radiologists reporting these CTs about the frequency and variety of non-COVID-19 findings in patients who underwent chest CT examination with the suspicion of COVID-19 pneumonia. This retrospective study was approved by our Institutional Ethics Committee. The requirement for written informed consent was waived. Our study included 6669 patients who applied to the emergency room with the suspicion of COVID-19 infection between March 20th and April 20th, 2020. The inclusion criteria were patients who had suspicious symptoms of having COVID-19 infection and/or had close contact with a patient with COVID-19 infection and (ii) patients who underwent chest CT. They evaluated CT scans individually, and all non-COVID-19 findings (NCF) were recorded manually
Results: The study population consisted of 6669 consecutive patients (males 55.5% and females 44.5%). The overall mean age was 41.7 years [SD 15.1]. There were incidental non-COVID-19 findings in 3159 (47.4%) patients and none in 3510 (52.6%) patients
Conclusions: CT examinations performed in patients with suspected COVID-19 pneumonia should be examined in detail regarding clinically significant findings. It is vital to take necessary precautions in advance regarding pathologies that may be clinically significant regarding appropriate treatment and follow-up planning at the appropriate time. It is crucial that the clues are stated in the radiology report so that the clinician can make appropriate management regarding these pathologies.