bluuebunny/crossref_metadata_2025 huggingface dataset:
Prediksi Harga Mobil Audi Bekas Menggunakan Model Regresi Linear dengan Framework Streamlit
Authors: Aulia Azhar Putri , Arya Pratama Muhammad , Fitriani Risma
Published: October 2024

Prediksi harga mobil bekas menjadi aspek krusial dalam pasar otomotif yang terus berkembang, hal ini akan memengaruhi keputusan penjual dan pembeli serta dinamika pasar secara keseluruhan. Meskipun kompleksitas dan variasi kondisi mobil bekas sering menjadi hambatan, adopsi teknologi dan metode yang tepat diharapkan mampu mengatasi tantangan tersebut. Melalui program prediksi harga, peneliti bermaksud untuk memberikan solusi praktis dan efisien bagi penjual dan pembeli mobil bekas Audi, dengan tujuan meningkatkan keputusan yang terinformasi dan tepat. Penelitian ini meggunakan algoritma Linear Regression untuk menemukan hubungan linear antara variabel-variabel yang digunakan. Tahapan metode yang digunakan meliputi problem recognition, research plan, dataset collection, data pre-processing, error calculation, dan web deployment. Hasilnya menunjukkan nilai akurasi sebesar 94% dan nilai Mean Absolute Error (MAE) sebesar 0,08 atau 8%. Hal ini memberikan indikasi yang kuat bahwa model linear regression yang digunakan telah berhasil dalam menghasilkan prediksi yang akurat untuk harga mobil bekas Audi.
Hernia de Morgagni en un Paciente Adulto. Reporte de Caso
Authors: Torres Perez Vicente de Paul , Castañeda Rodríguez Daniel , Pineda Hernández Karen Elizabeth , Montoya Moreno Karla Patricia
Published: October 2024

La hernia diafragmática de Morgagni es un padecimiento poco frecuente en adultos, con una incidencia de solo 3% al año. Presentamos el caso de un paciente femenino de 52 años con hernia diafragmática de Morgagni, que fue enviada de su hospital regional, después de un cuadro respiratorio, disnea persistente, dolor abdominal y antecedente de trauma abdominal no reciente, bajo la sospecha de hernia diafragmática derecha por telerradiografía de tórax. Se realiza TAC toraco-abdominal que reporta hernia diafragmática derecha con inclusión de colon transverso. Ante la sospecha de una hernia diafragmática postraumática, se decide un abordaje por toracotomía axial vertical posterior extendida derecha. En el transquirúrgico se confirmó el diagnostico de HERNIA DIAFRAGMÁTICA CONGÉNITA, DE MORGAGNI y se realiza una reparación por vía transtorácica con resultados óptimos al seguimiento actual. Ante la presencia de una hernia diafragmática en el adulto, tenemos que considerar la posibilidad de entidades congénitas y sus complicaciones como la obstrucción, estrangulación o perforación del contenido. Finalmente debemos de tener en cuenta la vía de abordaje transtorácica como buena opción en pacientes obesos, grandes sacos y estados crónicos, para facilitar así, la disección del saco y reducción de grandes contenidos a través de la cúpula hepática.
Revisión Científica del Coeficiente Intelectual Sexual
Authors: De los Santos de Dios Raquel Olivia , Mazó Quevedo María Lyssette , Sosa Peña Roció Guadalupe
Published: October 2024

El objetivo de esta investigación es identificar la producción científica sobre Coeficiente Intelectual Sexual (CIS) mediante la indagación de nuevos sentidos, que trasciende el nivel descriptivo de los datos para establecer nuevas relaciones de interpretación entre las categorías del objeto de estudio en las distintas producciones investigativas y crear nuevas miradas de investigación y formación” (Guevara Patiño, 2016); con la intención de determinar el nivel de conocimiento que las personas tienen sobre la sexualidad. Fernández et al (2018) mencionan que “los conocimientos y actitudes que se incorporan a lo largo del desarrollo en torno a la sexualidad derivan en buena parte de lo que transmiten los diferentes contextos de socialización”. La metodología aplicada consistió en un análisis de 17 documentos, obtenidos de Google Académico, del lapso entre 2013-2023. En las investigaciones revisadas se encuentra que un 88.23 % de las personas muestran que el CIS de los encuestados es medio e insuficiente. Se ha encontrado que “Los conocimientos adecuados en temas de sexualidad son reducidos, resaltando que su fuente de información no son los profesionales de la salud” (Carrión et al 2018, p. 126).
Technology-Enhanced Approaches for Teaching English to Law Students: Innovations and Best Practices
Authors: Bendeck Soto Juan Habib
Published: October 2024

This research paper summarizes an investigation into technology-enhanced English language teaching for law students in Medellín, Colombia. It briefly outlines the study's objectives, methodologies, and key findings, focusing on the improved English language proficiency, legal communication skills, and increased student engagement and autonomy due to technology-enhanced learning. Background: The study addresses the importance of English language proficiency for law students in a global legal context and the challenges in teaching English to this group. It reviews relevant literature on technology in language learning, particularly in legal education, establishing the theoretical basis for the research. Materials and Methods: The paper describes a mixed-methods approach involving 40 law students in Medellín. It explains the use of questionnaires for quantitative data and interviews and observations for qualitative data, alongside the methods of data analysis and ethical considerations of the research. Results: Findings from questionnaires indicate positive student perceptions of technology in learning and improvements in language proficiency. Qualitative data from interviews and observations highlight enhanced legal communication skills and increased engagement and autonomy in learning due to technology use. Conclusions: The conclusion synthesizes the study's findings, underscoring the positive impact of technology in legal English education. It discusses the implications for educators and suggests integrating technology into the curriculum. The paper concludes with recommendations for future research, particularly in exploring effective technology-enhanced teaching strategies.
Análisis del Comportamiento en las Exportaciones de la Pitahaya Ecuatoriana
Authors: Lucero Arevalo Escarleth Talia , Vallejo Yucci Timoteo Efrain
Published: October 2024

La presente investigación consiste en el análisis evolutivo de las exportaciones de la pitahaya ecuatoriana a partir del año 2019 hasta el 2023, periodo en cual fue intervenido para demostrar las variaciones en las exportaciones de esta fruta, su contribución significativa a las exportaciones en la categoría no petroleras del país. Esta fruta conocida como exótica cuenta con una gran demanda y acogida por los mercados internacionales gracias a su calidad que la distingue. La metodología aplicada en esta investigación tiene un enfoque cuantitativo, revisión bibliográfica y documental, además de que se realizó una valoración de datos mediante fuentes en especial generadas por BCE, MAGAP, Agrocalidad, las mismas que fueron utilizadas para el desarrollo del estudio. Los resultados analizados determinaron que existe un crecimiento del 40,52% en los periodos de estudio con una expansión en las exportaciones, especialmente en los países de Estados Unidos, Canadá, China y Hong Kong Catalogados como los principales destinos de la pitahaya ecuatoriana. Además, se pudo encontrar la correlación de alto nivel en las variables cuantitativas; año de exportación, peso neto en las exportaciones y el precio de la pitahaya como mercadería FOB, las cuales tiene mucha significancia de acuerdo a la escala de Pearson.
Inmunización de Pacientes que Reciben Anticuerpos Monoclonales
Authors: Rodríguez Balseca Víctor Andrés , Carmona Martínez Liliana Patricia , Jiménez Arriola Julia María , Arrieta Puello Paola Katherine , Luján Pinzon Jorge Mario
Published: October 2024

La administración de anticuerpos monoclonales es estrategia terapéutica clave en el tratamiento de diversas enfermedades, incluidas neoplasias malignas y trastornos autoinmunes. Sin embargo, la interacción entre estos tratamientos y la respuesta inmune a las vacunas es un área que requiere una atención detallada, dado que los anticuerpos monoclonales pueden afectar la eficacia y seguridad de la vacunación. La eficacia de las vacunas en pacientes tratados con anticuerpos monoclonales puede variar según el tipo de anticuerpo monoclonal utilizado y el tipo de vacuna administrada. Las vacunas basadas en ARNm y de subunidades tienden a mostrar una mayor adaptabilidad en su eficacia comparadas con las vacunas inactivadas. La respuesta inmunológica puede ser subóptima, lo que resalta la necesidad de estrategias de vacunación adaptadas a las características individuales de los pacientes. La seguridad de la vacunación en esta población se mantiene dentro de los límites aceptables, aunque se deben monitorizar posibles efectos adversos. Se necesitan investigaciones adicionales para definir mejor las mejores prácticas y directrices para la vacunación en pacientes que reciben anticuerpos monoclonales concentrándose en la evaluación de la respuesta inmunitaria a largo plazo y en la comparación de la eficacia de diferentes plataformas de vacunas en esta población específica.
Maltrato Infantil a Través de los Tiempos: Una Revisión de la Literatura
Authors: Rodríguez Balseca Víctor Andrés , Carmona Martínez Liliana Patricia , Jiménez Arriola Julia María , Arrieta Puello Paola Katherine , Luján Pinzon Jorge Mario
Published: October 2024

El maltrato infantil es una grave amenaza para el desarrollo óptimo durante la infancia y adolescencia, etapas cruciales para el bienestar físico, emocional y social del ser humano. A lo largo de la historia, la percepción y el tratamiento del maltrato han evolucionado significativamente. En la antigüedad los niños eran considerados propiedad de los padres, y el maltrato, incluyendo el infanticidio y la violencia física, era común. Con el tiempo, comenzó a cambiar esta visión, pero el abuso infantil persistió hasta la revolución industrial. En el siglo XX, el reconocimiento de los efectos del maltrato y la adopción de la Declaración de Ginebra y la Convención sobre los Derechos del Niño establecieron un marco internacional para la protección infantil. Sin embargo, el maltrato sigue siendo un problema global, con diversas formas que incluyen abuso físico, psicológico y negligencia, afectando la salud y el desarrollo infantil a corto y largo plazo. La prevención y el tratamiento del maltrato infantil requieren esfuerzos conjuntos, capacitación adecuada y estrategias integrales que promuevan el bienestar y los derechos de los niños.
Impacto de Factores Socioeconómicos, Culturales y de Género en la Normalización del Maltrato Infantil en Comunidades Rurales y Estrategias de Intervención para su Erradicación
Authors: Pérez Rodríguez Br. José Alberto
Published: October 2024

El artículo analiza el maltrato infantil en comunidades rurales, considerando los factores socioeconómicos, culturales y de género que influyen en la normalización de estas prácticas. A través de un enfoque interseccional de derechos humanos y perspectiva de género, la investigación explora cómo la pobreza, la falta de acceso a recursos básicos, los estereotipos de género y las prácticas culturales contribuyen a la violencia estructural y a la invisibilidad del maltrato infantil. El estudio utiliza un diseño de investigación cualitativo, combinando análisis documental y trabajo de campo para obtener una comprensión profunda del fenómeno. Los resultados revelan que, en muchas comunidades rurales, el maltrato infantil se percibe únicamente cuando causa daño físico o emocional grave, lo que limita las posibilidades de intervención temprana. Este fenómeno está arraigado en patrones culturales que consideran la violencia como un método aceptable de disciplina. Las niñas enfrentan un riesgo adicional debido a los roles de género que perpetúan su subordinación y vulnerabilidad. La investigación concluye que es esencial desarrollar políticas públicas con un enfoque culturalmente adecuado que respete las tradiciones locales, mientras promueve los derechos de la niñez. Además, se requiere fortalecer la capacitación de actores clave y crear redes de apoyo comunitarias. Un enfoque participativo y de derechos humanos, que incluya la voz de las niñas, niños y adolescentes, es crucial para la erradicación del maltrato infantil y la construcción de entornos más seguros y equitativos.
ETNOMATEMÁTICA APLICADA NO CONTEXTO COMERCIAL DE SÃO LUÍS: UMA ANÁLISE DAS PRÁTICAS MATEMÁTICAS DOS TRABALHADORES DA CEASA E MERCADO DAS TULHAS
Authors: COSTA Bruna Giovnana Oliveira , CASTRO Raimundo Santos de
Published: October 2024

Este artigo explora as práticas matemáticas utilizadas pelos trabalhadores da Central de Abastecimento do Maranhão (CEASA) e do Mercado das Tulhas, ambos localizados em São Luís - MA, a partir da perspectiva da Etnomatemática. O objetivo é identificar e analisar as técnicas de ordenar, classificar, quantificar e avaliar empregadas por esses trabalhadores em suas atividades cotidianas, ressaltando como esses saberes, frequentemente invisibilizados pela academia, são essenciais para a manutenção das tradições culturais e econômicas da cidade. A pesquisa adota uma abordagem qualitativa, com dados coletados através de entrevistas e observações no local de trabalho, e revela a importância de reconhecer essas práticas como formas válidas de conhecimento matemático. O estudo conclui que as práticas matemáticas observadas são fundamentais para a sustentabilidade econômica desses trabalhadores e para a preservação da identidade cultural da região.
ATIVIDADES E PRÁTICAS NA CRECHE: A FORMAÇÃO DOCENTE NA PERSPECTIVA DA INCLUSÃO
Authors: Cunha Ana Gabriele dos Santos , Costa Thais de Freitas da , Danelon Cristina Tavares de Moraes , Sampaio Ana Alice Kulina Simon Esteves , Duarte Érica Fernandes Costa
Published: October 2024

A inserção de crianças nas creches tem aumentado ao longo dos anos. Pela condição de trabalho damulher, na atualidade, nas creches há inserção de crianças com deficiência, as quais antes ficavam emcasa. Se incluir é um desafio permanente, inclusão para crianças em idade de creche é algo ainda maiscomplexo; pela pouca idade da criança, muitos diagnósticos, nesse período, são inconclusivos ainda. OTrabalho de Conclusão de Curso “Atividades e Práticas na Creche: A Formação Docente naperspectiva da inclusão” buscou analisar como as atividades realizadas na creche, por profissionaisatuando na perspectiva inclusiva, podem contribuir para o desenvolvimento integral das crianças. Notrabalho foram abordadas questões pertinentes: ao desenvolvimento infantil de 0 a 3 anos, oatendimento na creche, ao desenvolvimento das atividades realizadas e à formação docente. O trabalhofoi redigido a partir da análise de pesquisa bibliográfica sobre a estrutura da creche, a interferência dasatividades e práticas inclusivas para o desenvolvimento integral da criança e a formação docente voltadapara a inclusão. Foi realizada uma pesquisa bibliográfica e pesquisa de campo com apoio do formulárioGoogle com 10 professores de três creches municipais de um município no Rio de Janeiro. Espera-seque os resultados contribuam com a análise acerca das questões citadas acima no objetivo, propiciandoinformações que possibilitem um olhar mais aprofundado para as questões da inclusão em idade tãotenra.
CIÊNCIA GEOGRÁFICA EM DEBATE: APONTAMENTOS SOCIAIS, METODOLÓGICOS E FRONTEIRIÇOS
Authors: RIBEIRO Marcos Vinicius de Andrade
Published: October 2024

Este artigo discute os desafios contemporâneos da geografia, evidenciados na construção do conhecimento e nas metodologias necessárias para abordá-los de forma clara e tangível. Baseando-se nas ideias de Santos (1996), o texto explora três caminhos para a pesquisa geográfica: a ampliação do conhecimento com foco nos interesses da humanidade, a importância das ciências sociais para uma nova vivência e a inovação em métodos e teorias. O impacto da globalização é destacado, revelando novas culturas e comportamentos que interagem com os valores sociais, evidenciando a complexidade e dinamicidade do mundo atual. O artigo visa enriquecer os debates sobre as estruturas metodológicas da geografia, refletindo sobre a construção do conhecimento científico e sua relevância social, além de caracterizar abordagens e técnicas de pesquisa. Para alcançar esses objetivos, foram realizados levantamentos bibliográficos e análises de obras pertinentes, culminando na sistematização das informações apresentadas.
BIOECONOMIA: PERSPECTIVA DE DESENVOLVIMENTO DE CADEIAS PRODUTIVAS DA BIODIVERSIDADE DO AMAZONAS
Authors: Lasmar Dimas José , Ferreira Iwin da Silveira , Silva Michele Lins Aracaty e
Published: October 2024

A exploração da biodiversidade é apresentada desde o século XVII, com a utilização dos recursos naturais através das drogas do sertão. Sob a estrutura da Zona Franca de Manaus inúmeras empresas se instalaram com o passar dos anos, em um modelo estruturado através de incentivos fiscais. Entretanto com o passar dos anos surge o questionamento dos benefícios desse modelo para o desenvolvimento regional do estado do Amazonas frente a alternativas econômica e ambientalmente sustentável. Apresenta-se como objetivo geral analisar cadeias produtivas para desenvolver no âmbito da bioeconomia como um eixo de desenvolvimento regional para o Estado do Amazonas. Descreve-se como objetivos específicos: 1) Mapear os principais produtos extrativistas e não extrativistas da bioeconomia; 2) Identificar as principais cadeias produtivas potenciais da bioeconomia no Amazonas e respectivos dados socioeconômicos; 3) Verificar aspectos logísticos do Amazonas e possibilidades de introdução de processos para otimização e escoamento dos produtos da bioeconomia. Os procedimentos técnicos utilizados na metodologia foram buscas bibliográficas com análises de dados secundários em bancos de confiança. Pode-se observar, como resultados da pesquisa os dados socioeconômicos, alinhados com os da produção e capacidade de produtos extrativistas, pesqueiros e dados logísticos. Verifica-se que a abundância de produtos de cadeia de valor e cadeia produtiva são aspectos importantes para considerar a bioeconomia como eixo de desenvolvimento regional importante, complementar à Zona Franca de Manaus.
Eggshell Particulate Reinforced Polymer Composite – A Review
Authors: Patel Vimalkumar A. , Pandey Akash B. , Nandarvawala Burhan T.
Published: October 2024

Due to their low loading bearing, high thermal stability, renewability, and cost-effectiveness, natural filler reinforced polymer composite plays a significant role in the production of biodegradable materials. In spite of the fact that eggshells are discarded as waste, eggs are a highly produced food all over the world. Due to its high calcium carbonate content, eggshell is a potential resource for the polymer industry. This research aims to advance our understanding of eggshell and eggshell particulate reinforced polymer composites. Both fabrication techniques and methods for treating eggshell particles are discussed. Then, the physical and mechanical properties of eggshell-polymer composites are review and presented.
The Use of Heart Rate Measures to Evaluate Stress Levels among Air Traffic Controllers
Authors: Rahman S.M.B. Abdul , Saini Muhammad Haziq Saini , Jaafar Siti Ainun Izzati , Mustafa Amiruddin
Published: October 2024

This paper looks at the possibility of using a heart rate monitor to evaluate stress levels among Air Traffic Controllers (ATCOs). Air Traffic Control (ATC) service requires constant good planning, situation awareness, and always making sound decisions. A study was conducted on two ATCOs for three complete work cycles: the morning shift from 8 a.m. to 4 p.m., the afternoon shift from 4 p.m. to 12 a.m., and the night shift from 12 a.m. to 8 a.m. Both participants have different roles, with Subject A being a planner controller while Subject B is a radar controller. The study used the NASA Task Load Index (NASA-TLX) survey to collect the subjective workload rating and a heart rate monitor armband to measure the heart rate reading of an ATCO and then compare it with the number of aircraft within the controlled area. Two hypotheses were investigated: the first one is the relationship between the number of traffic and heart rate readings, and the second hypothesis is the relationship between the elapsed working time and heart rate reading. The Spearman correlation test has been used to determine these relationships. Based on the results, a p-value of less than 0.05 and a positive correlation indicates a significant relationship between the number of aircraft and heart rate readings for both subjects. Elapsed time and heart rate measurement, on the other hand, do not significantly correlate with a p-value greater than 0.05 and a negative correlation was produced for both subjects. The unweighted NASA-TLX workload measure confirmed the findings for Subject A but not for Subject B. This might be due to the different roles carried out by both subjects during the experiment. This shows that different work tasks resulted in different workload-induced factors. The results show a promising outcome of using a heart rate monitor to evaluate stress levels among ATCOs. However, more subjects were needed to enable the use of this concept for future purposes of measuring ATCO stress levels to manage workload.
Evaluation of Impact of Additive-Blended Biofuels (ABFs) on Single-Cylinder Motorcycle Engines
Authors: Olawale Kazeem Babalola , Alimin Ahmad Jais
Published: October 2024

The elimination of subsidies for conventional gasoline (E0) in Nigeria has led to a surge in fuel prices, prompting researchers to explore alternative automotive biofuels. Among the promising options are additive-blended biofuels, which can be used in spark ignition engines (S.I.E.). However, biofuels have limitations, such as lower energy density, compatibility issues, and potential infrastructure degradation. Additive-blended biofuels (ABFs) represent an advanced technology that can address these shortcomings and enhance the performance of blended biofuels in automotive engines. In this study, additives were prepared and added to ethanol-gasoline blends, which are referred to as additive-blended biofuels (ABFs). E0 and ABFs were then tested in a single-cylinder motorcycle engine on a chassis dynamometer to evaluate the performance and emission characteristics of ABFs at partial and full load respectively. It was found that ABFs exhibited an increase in engine torque (T), brake power (BP) and brake mean effective pressure (BMEP) by 42.3%, 25.2% and 48.3%, respectively over E0. In addition, ABFs showed a 40% reduction in brake specific fuel consumption (BSFC) compared to E0. On the other hand, the emission measurements showed that NOX and HC emissions were reduced by 76 % and 35.3 % respectively for ABFs compared to E0.
Educational Software for Stress Analysis of Open Thin-Walled Structures
Authors: Mohamed Ali Jaffar Syed , Mad Nasib Wan Muzamir , Che Basir Haqmal Aqif
Published: October 2024

Thin-walled structures are commonly employed in aerospace and automotive structures because of their high strength to weight ratio. Design and hence the stress analysis of thin-walled structures is tedious and time-consuming. An educational software which can aid students in stress analysis of thin-walled open sections will enhance the teaching-learning process. With the present available software, the number of sections that can be analysed is limited, hence in this work, a generalized section has been developed through which many new complex sections can be generated and analysed for stresses. The objective of the present work is to develop educational software that will provide a solution for the section properties like centroid, moment of inertia and shear centre, and the stresses on the section for a given loading. The software enables students to select different cross-sections which may be subjected to bending, shear or torsional loads and evaluate the stresses on it. Results obtained through this software have been validated against literature. The software has been developed using MATLAB with graphical user interface (GUI). The software is expected to be a useful tool for effective teaching learning process of courses on thin-walled structures, aircraft structures and advanced mechanics of materials.
Brain Tumor Detection and Size Estimation using Microwave Imaging
Authors: Limbah Mohamad Hamizi , Agku Mohd Ridzwan Dayangku Malisa , Lago Herwansyah , Haron Ahmad Razani , Ibrahim Pungut , Megat Hasnan Megat Muhammad Ikhsan , Mohamad Nur Aqilah , Chai Chang Yii , Diantoro Markus
Published: October 2024

This project focuses on developing an antenna that utilising microwave imaging technology for visualising, detecting, and estimating the size of human tumors using simulation approach. A rectangular microstrip patch antenna is chosen for its advantages of low cost, convenience, efficiency, and compactness, offering a non-ionised alternative. To meet the antenna specifications, rectangular slots are incorporated into the design. The antenna performs effectively at 7.5 GHz, exhibiting a return loss of -24.20383 dB, well below the -10 dB threshold. Placing the antenna 15 mm away from the human brain model results in a specific absorption rate (SAR) value of 0.2 W/kg for 10g, indicating its safety for brain imaging. By scanning a human head phantom with and without a tumor, the antenna captures reflected signals from different locations, enabling the generation of tumour images. A 10-mm-radius tumor is introduced to the phantom, and the unique reflected signal serves as an indicator for tumor detection, using the signal without a tumor as a reference. MATLAB software is employed for image processing, allowing the generation of tumour images and the estimation of tumor size. The simulation results demonstrate 63% accuracy in tumor size estimation. In conclusion, the antenna proves to be a safe and effective brain imaging system for tumor detection.
Application of Internet of Things (IoT) on Monitoring EC and pH Values for Fertigation System
Authors: Azwa Mahmudin Nur Shafiqa , Mohammad Radzi Nur Hanis
Published: October 2024

This paper introduces a novel Internet of Things (IoT) based fertigation control system designed to enhance traditional agricultural practices in Malaysia, particularly in rural areas. The system integrates a fertigation approach, combining fertilization and irrigation, with smart devices and a NodeMCU ESP32 microcontroller to automate the tracking of data from liquid fertilizer mixtures. By utilizing EC and pH sensors, the system accurately monitors the nutrient concentration and pH levels of the fertilizer mix, with data displayed on an IoT platform for real-time observation and control. This approach mitigates common issues such as overfertilization and inefficient nutrient use, offering significant improvements over manual data collection methods. The system's performance was validated, showing successful monitoring and control of the fertilization process, leading to enhanced plant health and crop quality. Key findings indicate that the system's integration with IoT technology provides a more efficient, automated solution for managing fertilizer applications, reducing labor and time while ensuring optimal plant nutrient levels. The study also highlights the potential for future development, including the integration of additional sensors and advanced data analytics to optimize fertigation practices further. The implementation of this IoT-based system represents a significant advancement towards sustainable agriculture, offering practical benefits for Malaysian farmers and setting a foundation for further innovation in fertigation technology.
An Optimization of RSRP on Wi-Fi and LTE-LAA Coexistence Networks
Authors: Mohd Hanapiah Nur Haidah , Yusof Azita Laily , Ya’acob Norsuzila
Published: October 2024

Over the last decade, mobile traffic has grown at an exponential rate, resulting in a scarcity and incompetent use of licensed spectrum by mobile network operators. Therefore, it is important to maintain effective communication to avoid disconnecting signals. The technique of regulating the power of a transmitter in order to improve the communication signal or entire quality of service is known as power control. It is mostly used to improve the performance of a communication device by controlling the transmission power. Power control, in most scenarios, allows the transmission or signal power to be scaled, leading to improved signal quality. On the other hand, power control methods are aimed at avoiding unnecessarily high-power transmission. Hence, particle swarm optimization (PSO) is a computational method for optimizing the reference signal received power (RSRP) by iteratively attempting to improve an unnecessarily high-power transmission solution in terms of a given quality measure. The objective of this research is to evaluate the optimum RSRP value and proposed ideal energy detection threshold for Wi-Fi and LTE-LAA in order to obtain fair coexistence between two networks. Thus, simulations for PSO are carried out using MATLAB software. Based on the results obtained, there are improvement in throughput for both networks after PSO implementation therefore, an ideal energy detection threshold is suitable to use in order to get fair coexistence between Wi-Fi and LTE-LAA networks. Consequently, all the results obtained will be used in following research work in order to evaluate user’s handover in various scenarios.
The Effect of the Ratio of Fly Ash to Alkaline Activator and the Molarity of NaOH on the Mechanical Properties of Fly Ash-Based Aggregates
Authors: Zawawi Jared Aland Kurnia , Adhitya Bimo Brata , Costa Anthony , Nayobi Budi
Published: October 2024

The global demand for aggregates has escalated, leading to a decline in the availability of quality natural aggregates. In response, the cold bond pelletization (CBP) process emerged in the early 2000s as a novel approach to artificial aggregate production, utilizing dry powdered fly ash. This method involves agglomerating fly ash particles at room temperature in an inclined rotating pan to form pellets. However, the abstract lacks clarity in elucidating the significance of this approach. Our study investigates the mechanical properties of aggregates produced through the CBP method via experimental laboratory methods, focusing on variations in the ratio of fly ash to alkaline activator (FA/AA) and the molarity of Sodium Hydroxide (NaOH). Notably, we found that an effective molarity of 15 resulted in the lowest Aggregate Impact Value (AIV) percentage, indicating improved mechanical properties. Furthermore, we observed fluctuations in AIV values across different FA/AA ratios and NaOH molarities, suggesting nuanced effects on aggregate quality. Our findings underscore the importance of optimizing parameters in the CBP process for enhanced aggregate performance.
Numerical Study on Heat Transfer Characteristics of Jet Impingement by using MgO Nanofluid
Authors: Tan Zhi Xian , Tang Tsz Loong , Salleh Hamidon , Muhalhal Hasan Abdualatif , Mohd Hanafi Nur Syahirah , Mohamed Intan Fadhlina , Mohd Sabri Mohd Anas , W. Ghopa Wan Aizon
Published: October 2024

Liquid impingement jet can provide high local heat transfer coefficients between the impinged liquid and the targeted surface. Jet impingement is utilized in the applications which is related to rapid cooling and better control of high temperature in many applications. The studies are carried out numerically by using ANSYS Workbench 18.2. Hexagonal meshing and Shear-Stress Transport (SST) turbulence model is used in the numerical simulation. By using SST turbulence model, the effect of jet Reynolds number, nanofluid volume concentration on the average heat transfer coefficient of the target plate is analysed and discussed. For the effect of varying the Reynolds number, it is observed that the surface average heat transfer coefficient increases at least 76.18% as the Reynolds number increases from 5000 to 10000. Moreover, the heat transfer coefficient increases as the volume concentration increases from 0% to 5%. It is also observed that when the nanofluid with higher thermal conductivity will results in higher heat transfer coefficient where the MgO nanofluid showed the highest heat transfer coefficient. As a conclusion, by increasing Reynolds number, volume concentration and thermal conductivity of nanofluid, the heat transfer coefficient can be enhanced.
Simulation of Small-Scale Wind Turbine Performance with Taperless Blade
Authors: Mahmudin Faisal , Fitriadhy Ahmad , Rampo Audrye Kezya Nathania
Published: October 2024

Utilizing wind turbines typically involves a large-scale project with extremely huge wind turbine sizes. Because of this, the use of wind turbines in Indonesia is not yet very common and widespread among the community. Basically, a wind turbine has blades; the number of blades on a wind turbine can affect the overall performance of the turbine. Large-scale wind turbine projects usually implement tapered blades, while small-scale projects use taperless blades. Therefore, in this research, a horizontal-axis wind turbine with taperless blades will be used as the object of study to find out the optimal number of taperless blades that can achieve the best performance of a small-scale wind turbine category. The method used in this research is to design a horizontal axis wind turbine equipped with taperless blades with varying numbers of blades, namely three blades, four blades, and five blades, and then simulate the turbine's performance with wind speeds of 3 m/s to 6 m/s. The present research found that the greater the number of turbine blades tends to produce greater power. This is proven by research results, where the highest power in a small-scale horizontal axis wind turbine produces a power of 20,30 Watts in a 5-blade turbine variation for the wind speed of 6 m/s.
Exergy Analysis of Hydrogen-Rich Syngas Production System Utilizing Palm Oil Empty Fruit Bunch using Pyrolysis Connected with Steam Methane Reformer
Authors: Bin Nur Taufiq , Marpaung Dony Walfared Kurniawan , Syam Syafiie
Published: October 2024

Fossil fuel consumption on a large scale continues to increase yearly, causing a shortage of energy sources. Hydrogen can help to overcome the shortage of energy sources. It can be produced from renewable energy sources, such as oil palm Empty Fruit Bunch (EFB) as biomass using pyrolysis processes equipped with steam methane reformer and water gas shift reactions. This research was conducted to determine the amount of hydrogen that can be produced and to analyze the exergy of the existing systems in the hydrogen production process. Aspen Plus has been used to design and analyze pyrolysis processes, steam methane reform, and water gas shift reactions. The results showed that when 6.54 kg Empty Fruit Bunch was used as raw material in a pyrolysis reactor, hydrogen could be produced in the amounts of 0.435 kg. The exergy values of raw materials and fuels are relatively high because the chemical exergy values of the compounds contained therein are also high. Based on the calculations, it is found that the combustion process is the process that experiences the most significant exergy destruction. The exergy efficiency of this hydrogen production process system is 22.77%.
A jövő terrorizmusa
Authors: Ritecz György , Sárkány István
Published: October 2024

The authors provide an overview on possible trend sin international terrorism.
Impact of COVID-19 on dengue: a twofold challenge to public health in Sabah, Malaysia
Authors: Balakrishnan Krishnan Nair , Lee Ping-Chin
Published: October 2024

Introduction: The dengue epidemic poses a significant public health challenge in Malaysia, and the concurrent presence of dengue and SARS-CoV-2 infections has further strained its healthcare system. Sabah, the second largest state in Malaysia, located in the northern part of Borneo Island, has been particularly hard-hit by both dengue and SARS-CoV-2 outbreaks. This study aims to analyze the status of dengue infections in Sabah over the past decade and understand the impact of the COVID-19 pandemic on dengue virus transmission.
Methodology: This study compared the annual dengue cases and associated deaths in Sabah from 2012 to 2022. Systematic data and information were collected from PubMed, the World Health Organization, the Centers for Disease Control and Prevention, and the official government reporting system of Malaysia.
Results: Dengue cases in Sabah increased overall with slight fluctuations over the years, marked by new outbreaks approximately every 3-5 years. The number of deaths did not consistently correlate with reported dengue cases. Early in the COVID-19 pandemic in 2020, dengue cases remained high; however, as COVID-19 cases surged, dengue cases experienced a significant decline. Conversely, from mid-2022, dengue cases surged in Sabah despite COVID-19 cases remaining relatively low and well-controlled. Particularly noteworthy is the 99% increase in dengue cases in Sabah, contrasting sharply with Malaysia’s overall 36% decrease in 2022 compared to 2015 to 2019.
Conclusions: Monitoring and prioritizing efforts to prevent COVID-19 and control dengue transmission is crucial. The dual challenges posed by these diseases offer valuable lessons that should be incorporated into future pandemic-preparedness strategies.
Assessing COVID-19 outcomes among healthcare workers: a retrospective study
Authors: Hussein Nawfal R , Ibrahim Ronahi Y , Daniel Shameran S , Mustafa Majeed H , Jakhsi Salar N , Husamaldeen Shilan MT , Haleem Khalid H , Naqid Ibrahim A , Saleem Zana SM , Mahdi Ahmed S , Ibrahim Nashwan MR , Mohammad Ameen M , Saleh Avan S , Ameen Rasheed M , Musa Dildar H , Saleh Rojan S , Haji Selah S
Published: October 2024

Introduction: The purpose of this research was to investigate the outcomes of coronavirus disease 2019 (COVID-19) infection in healthcare workers, assess the incidence of infection among them, and identify factors linked to the severity of the disease.
Methodology: This cross-sectional study was conducted retrospectively in Duhok city, Kurdistan Region of Iraq, from September 2021 to January 2023.
Results: The study included 1,958 participants, of whom 1,338 (68.33%) contracted the infection. Among them, 830 (62.03%) and 372 (27.81%) patients experienced mild and moderate infections, respectively, while 136 (10.1%) had severe infections. The results indicated that several factors, including maintaining a healthy lifestyle, avoiding obesity, having a chronic condition, working consecutive hours, and being in an overwhelmed work environment were significantly associated with a higher severity of infection (p < 0.05). However, factors such as smoking habits, adherence to preventive health guidelines, direct exposure to COVID-19 patients, work days and patterns, family members with COVID-19, and hand/glove sterilization did not appear to have a significant effect on the severity of infection (p > 0.05).
Conclusions: These findings may offer valuable insights for clinicians and public health officials, and aid in the development of effective strategies to manage COVID-19 patients based on their risk factors for infection severity.
Effect of obesity on COVID-19 disease severity in children
Authors: Çağ Yakup , Karaaslan Ayşe , Çıkrıkçıoğlu Aslı A , Köle Mehmet T , Çetin Ceren , Akın Yasemin
Published: October 2024

Introduction: Coronavirus disease 2019 (COVID-19) has caused many injuries and deaths worldwide. Obesity is reported to be an important risk factor for severe COVID-19, although the underlying mechanism is not fully understood. The present study aimed to determine whether obesity or being overweight is associated with the clinical course and severity of COVID-19 in children.
Methodology: In this retrospective study, pediatric patients under the age of 18 years, who applied to our hospital between June 2021 and August 2021, and tested positive with the COVID-19 reverse transcriptase-polymerase chain reaction test were included. Age, gender, symptoms at admission, body weight, height, chest radiographs, hemograms, C-reactive protein and other laboratory findings, and days of hospitalization of the pediatric patients were obtained from the hospital automation system. All data were statistically analyzed and compared between underweight, normal, overweight, and obese groups; categorized according to body mass index (BMI).
Results: The study included 116 patients. The results showed that the incidence of symptoms was higher in overweight and obese children compared to other groups (p < 0.05), while the rate of lung involvement was significantly higher in obese patients compared to other groups (p < 0.05). The optimum cut-off point for BMI percentile values in terms of lung involvement was determined to be > 91.
Conclusions: The results of this study revealed that obese children show more symptoms of COVID-19 disease than normal-weight children. In addition, these children have more frequent lung involvement and therefore have more severe disease.
Effects of vaccination on antibody level and duration of viral shedding in Omicron patients
Authors: Wan Zhen , Han Jing , Wang Deyin , Li Yonghui , Zhai Weixiang , Zhao Weikang , Zhang Xiaodong , Xie Yi
Published: October 2024

Introduction: We compared the clinical characteristics of vaccinated and non-vaccinated Omicron patients in order to provide a reference for the clinical diagnosis and treatment of coronavirus disease 2019 (COVID-19).
Methodology: This study included 360 patients diagnosed with COVID-19. The serum immunoglobulin G (IgG) and serum immunoglobulin M (IgM) antibody levels of the patients and the duration of virus shedding were analyzed according to age, gender, vaccine dose, and the time from the most recent vaccination to the onset of Omicron infection.
Results: Age (OR = 0.974), days from last vaccination to onset ≤ 180 days (OR = 4.409), and booster dose of the vaccine (OR = 4.999) were protective factors associated with patients who were IgG antibody positive. The duration of virus shedding in IgG -antibody-positive patients was 9 (8-11) days; and this was significantly lower than that in IgG-antibody-negative patients, who had virus shedding duration of 10 (8-12) days (p < 0.05).
Conclusions: Booster immunizations could increase IgG-antibody in patients who have already been infected with the Omicron variant and enhance immune protection. In addition, COVID-19 vaccination may shorten the duration of virus shedding.
A single-center experience in home management of mild and moderate COVID-19 cases
Authors: Hegazy Mohamed T , Abdel-Hamid Hoda M , Salem Amany A , Nagy Fady , Rizk Sobhi E , Abd El Wahab Hadeel , Naguib Ibrahim , El Assaly Hany , Farwaela Hala M , Morad Mohamed A , Mortagy Mohamed , Attia Hend , Elebrashy Ibrahim , Mattar Mervat , Ibrahim Maha H E-D
Published: October 2024

Introduction: The use of telemedicine for treatment of coronavirus disease 2019 (COVID-19) infection has been effective in lowering the risk of infection and relieving strain on the healthcare system. This study aimed to describe the clinical characteristics of COVID-19 cases, their follow-up, risk factors of disease severity, and predictors of hospital admission while using telemedicine.
Methodology: The study included 611 Egyptian patients with mild and moderate COVID-19 disease. The patients were isolated at home and monitored daily.
Results: Based on the World Health Organization classification, 79% of studied patients had mild illness while 20.5% had moderate illness. The initial symptoms included cough (51.7%), fever (50.8%), fatigue (45.9%), sore throat (41.1%), dyspnea (35.2%), and headache (34%); 25.2% patients had prolonged symptoms (≥ 21 days). Dyspnea was the most frequent (15.5%) long-term symptom. Age, co-existing diabetes, and COVID-19 infection with moderate severity, were associated with the need for hospitalization. We compared patients with COVID-19 infection who required hospital admission (n = 37) versus patients who continued in home isolation (n = 574). High neutrophil/lymphocyte ratio, transaminases, and ferritin significantly correlated with the need for hospitalization. 18.9% of the patients who required hospital admission had diabetes. Multivariate analysis described age and diabetes as independent predictors of disease severity. Age and high neutrophil/lymphocyte ratio were independent predictors of hospital admission.
Conclusions: Telemedicine is effective in-home management of mild/moderate COVID-19 patients, which may ease the pressure on the healthcare system, even beyond the pandemic.
Outbreak of SARS-CoV-2 variants in Iraqi Kurdistan region
Authors: Majed Sevan O , Dzay Rande , Yashooa Raya Kh. , Mustafa Suhad A
Published: October 2024

Introduction: Coronavirus disease 2019 (COVID-19) first appeared in Iraq, including the Iraqi Kurdistan region governorates, in March 2020.
Methodology: 48,494 samples were collected from public hospitals in the Kurdish governates from February 2021 to May 2022. Viral RNA was extracted, and real time quantitative polymerase chain reaction (RT-PCR) was used to detect the COVID-19 variants. Statistical analysis of patients’ clinical data was performed.
Results: The RT-PCR results identified the Alpha (B.1.1.7), Delta (B.1.617.2), and Omicron (B.1.1.529) variants in the Kurdistan governorates. Young adults (20-39 years) had significantly higher rate of infection than children (1-11 months) and older adults (80-89 years). The Delta wave was more contiguous, spread more easily, and more fatal than the Alpha and Omicron waves. The highest number of COVID-19 cases was reported in Sulaymaniyah and Duhok; and the highest death rate was reported in Sulaymaniyah. The death rate in males was higher than in females, especially among older people. Fatigue, cough, and fever were common symptoms among the three variants. The phylogenetic tree revealed that the L-type of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) was a descendant of the S-type at an early stage of evolution. The L-type could spread faster in Kurdistan. Multiple sequence alignment (MSA) confirmed that all L-type variants in different countries were 100% similar in sequence, and all were mutated in the regions 8782: ORF1ab and 28144: ORF8 703.
Conclusions: This study described the COVID-19 waves, pathogenesis, and evolution of the virus in the Iraqi Kurdistan region.
When cancer patients encountered COVID-19: clinical characteristics and outcome in China
Authors: Wang Guojing , Dong Xin , Huang Shengkai , Xu Xiaotian , Wu Xi , Yu Xueting , Gao Quanquan , Guo Kai , Zhang Wenfeng , Wei Baojun , Cui Wei
Published: October 2024

Introduction: Cancer patients were more likely to be affected by the coronavirus disease 2019 (COVID-19) pandemic. Therefore, we analyzed the clinical characteristics and outcomes in cancer patients who were infected with COVID-19 to determine if they were more vulnerable to COVID-19 than non-cancer patients.
Methodology: This retrospective study involved 150 cancer patients and 300 non-cancer patients with a laboratory-confirmed diagnosis of COVID-19 at the Cancer Hospital of the Chinese Academy of Medical Sciences, at the end of 2022. Multivariable analysis was carried out on the factors associated with COVID-19 severity in cancer patients.
Results: Compared to the non-cancer group, the cancer group saw a notably higher number of hospitalizations and fatalities. Multivariate analysis showed that COVID-19 severity was correlated with male gender (OR: 5.60, 95% CI, 1.89-16.57), and recovery duration was longer than 10 days (OR: 3.19, 95% CI, 1.09-9.32) in the cancer group. However, the severity of COVID-19 was not made worse by the administration of systemic anticancer treatments prior to the outbreak.
Conclusions: During the COVID-19 Omicron epidemic, there seemed to be some association between various antitumor therapies, treatment intervals, and COVID-19 severity. The findings of this study can potentially help allay cancer patients` fears regarding COVID-19 infection and enable them to continue with crucial therapeutic processes for the treatment of cancer.