bluuebunny/crossref_metadata_2025 huggingface dataset:
PARAMETRIC DESIGN AND ADAPTIVE SIZING OF LATTICE STRUCTURES FOR 3D ADDITIVE MANUFACTURING
Authors: MARTIN DOÑATE CRISTINA , MERCADO COLMENERO JORGE MANUEL , DIAZ PERETE DANIEL , RUBIO PARAMIO MIGUEL ANGEL
Published: January 2025

The present research is developed into the realm of industrial design engineering and additive manufacturing by introducing a parametric design model and adaptive mechanical analysis for a new lattice structure, with a focus on 3D additive manufacturing of complex parts. Focusing on the land-scape of complex parts additive manufacturing, this research proposes geometric parameterization, mechanical adaptive sizing, and numerical validation of a novel lattice structure to optimize the final printed part volume and mass, as well as its structural rigidity. The topology of the lattice structures exhibited pyramidal geometry. Complete parameterization of the lattice structure ensures that the known geometric parameters adjust to defined restrictions, enabling dynamic adaptability based on its load states and boundary conditions, thereby enhancing its mechanical performance. The core methodology integrates analytical automation with mechanical analysis by employing a model based in two-dimensional beam elements. The dimensioning of the lattice structure is analyzed using rigidity models of its sub-elements, providing an evaluation of its global structural behavior after applying the superposition principle. Numerical validation was performed to validate the proposed analytical model. This step ensures that the analytical model defined for dimensioning the lattice structure adjusts to its real mechanical behavior and allows its validation. The present manuscript aims to advance additive manufacturing methodologies by offering a systematic and adaptive approach to lattice structure design. Parametric and adaptive techniques foster new industrial design engineering methods, enabling the dynamic tailoring of lattice structures to meet their mechanical demands and enhance their overall efficiency and performance.
Keywords: Computer-Aided Design, Industrial Design, Innovative Design, Additive Manufacturing, FEM Simulations
SIMULATION AND EXPERIMENT ON PET AND BOPP MIXTURE SEPARATION BASED ON EDEM–FLUENT
Authors: San Yunlong , Li Yumei , Ma Fei , Zhang Chengyu , Liu Yanbin
Published: January 2025

To improve the efficiency and quality of polyethylene terephthalate (PET) recycling, the air separation recovery of PET and biaxially oriented polypropylene (BOPP) materials in broken plastic beverage bottles was explored and analyzed in this study. A gas–solid two-phase flow model was established to simulate the movement of flaky mixtures with different textures in the wind field. Analysis results show that wind velocity at the air outlet (A), initial material falling speed (B), angle between wind velocity at the outlet (C) and the horizontal direction, and material feed rate (D) are the key parameters that affected the separation. On the basis of the simulation results, an orthogonal experiment with four factors and three levels was designed, and range analysis and ANOVA were performed on the test results, which present the result of the influencing degree of each factor on the separation rate as follows: A > B > C > D. The fitting analysis of 3D scattered-point surfaces, the interaction between A and B exerts the greatest influence on the separation rate in the six groups of interaction experiments. The best separation parameters are acquired for the experiment, and the mass percentage of recycled PET is 99.96%, which achieve recycling requirements.

Keywords: EDEM–Fluent coupling; Air separation; Orthogonal experiment; PET/BOPP mixture
Analysis of Factors Affecting Employee Performance at the Health Office
Authors: Eva Suzanna  , Lilis Suryani  , Chairil Zaman  , Hamyatri Rawallah
Published: January 2025

Employee performance is a measure that can be used to establish a comparison of the results of the implementation of tasks, responsibilities given by the organization to measure work performance or organizational performance. Currently, there is still no fulfillment of health worker standards in accordance with the Ministry of Health's moratorium at the Empat Lawang District Health Office. This study aims to determine the overview of employee performance analysis at the Health Office of Empat Lawang Regency in 2024.  The design of this study is a quantitative analytical survey with cross sectional approach.  The population of this study was all employees of the Health Office of Empat Lawang Regency in 2024, which amounted to 95 respondents. Sampling in this study using total sampling technique, so that the sample in this study amounted to 95 respondents. Data collection using questionnaires. Bivariate data analysis using Chi-Square test and multivariate multiple logistic regression. The results showed that there was a relationship between age (p value 0.042), education (p value 0.013), officer working time (p value 0.000), workload component (p value 0.002), workload standard (p value 0.011), and supporting task standard (p value 0.000), to the performance of employees in the Health Office of Empat Lawang Regency in 2024. The most dominant factor with employee performance is the workload component (p value 0.002), (OR 4.053). For the Health Office should be able to improve employee performance by setting the types of tasks and job descriptions that are actually carried out by certain types of SDMK in accordance with the basic duties and functions of employees.
Analysis Factor of Compliance With Taking Anti-Pulmonary Tuberculosis Drugs in Patients With Pulmonary Tuberculosis
Authors: Vera Kurnia Putri  , Chairil Zaman  , Akhmad Dwi Priyanto  , Dianita Ekawati
Published: January 2025

The most important factor of treatment compliance in the treatment of pulmonary tuberculosis patients is the patient's own awareness of their health status, thus ensuring treatment compliance and facilitating the achievement of recovery. This study aims to determine the description of the analysis of compliance with taking anti-pulmonary tuberculosis drugs in patients with pulmonary tuberculosis at the UPTD Puskesmas Nibung Kab. North Musi Rawas in 2024. This research design is quantitative cross sectional approach. The sample in this study amounted to 35 respondents. Respondent inclusion criteria are tuberculosis patients at UPTD Puskesmas Nibung Kab. North Musi Rawas and willing to become respondents. Data collection using a questionnaire. Bivariate data analysis using Chi-Square test and multivariate multiple logistic regression. The results showed the pvalue of each variable studied, namely gender p value 0.001, education (p value 0.008), occupation (p value 0.011), knowledge p value 0.000, family support p value 0.002, and attitude p value 0.001, on compliance with taking medication at the Nibung Health Center, North Musi Rawas Regency in 2024. The most dominant factor with drug compliance is gender (p value 0.001), (OR 15.583). The conclusion is that there is a significant relationship between gender, education, occupation, knowledge, family support and attitude towards adherence to taking medication. The health center should be able to provide counseling and education about tuberculosis and how to be obedient in taking anti-tuberculosis drugs.
Factor Analysis of Contraceptive Use of Operative Methods in Men
Authors: Vivi Yanti  , Gema Asiani  , Arie Wahyudi
Published: January 2025

Male surgical method contraception is the closure of the sperm ducts to prevent pregnancy and is included in the long-term contraceptive method. The purpose of this study was to find out the description and information about the use of contraceptive methods of male surgery. The research design used quantitative and qualitative methods. The quantitative method involves analytical observational research with a cross-sectional design. The study sample amounted to 100 respondents with stratified random sampling technique. Qualitative methods in analyzing by collecting data, presenting data, reducing data and verifying data. Qualitative samples involved 8 informants. The results showed no relationship between age (p-value 0.098), number of children (p-value 0.622), occupation (p-value 0.484), knowledge (p-value 0.883), family support (p-value 0.447, the role of contraceptive extension workers (p-value 0.358), and the availability of health resources (p-value 0.791) with the use of male surgical methods. The results of the qualitative study showed a lack of knowledge and socialization as the main factors in the use of male surgical method contraception has not reached the target. The researcher concluded that there was no relationship between age, number of children, occupation, knowledge, family support, the role of contraceptive field extension workers and the availability of health resources with the use of male surgical method contraception. There needs to be education to increase the use of male surgical method contraception and there is an active effort from officers in providing information to couples of childbearing age, especially those who do not want to have more children, as well as education to wives to support their husbands to use male surgical method contraception.
Functional Evaluation of Rural Housing Based on a Seismically Optimized Proposal With Respect to the E-080 Standard, Shaullo Chico Baños Del Inca
Authors: Becerra Alexa
Published: January 2025

The purpose of the research carried out is to evaluate the functional state of the houses built with adobe in the Shaullo Chico Village Center, Baños del Inca, Cajamarca, and to quantify the main internal and external deficiencies that may influence their behavior in the event of a seismic event. The methodology used is framed in a non-experimental descriptive approach, applied study design and the sample consisted of 20 houses built with adobe, for which a non-probabilistic sampling was used. Data collection was carried out through detailed observations of each household, and then the Shapiro-Wilk test was applied in the processing of the information. It is important to note that the registered homes were built by the inhabitants of the area themselves, who lacked exhaustive knowledge of building regulations and did not have technical advice during the design and construction process. The processed results reveal the deficiencies identified in the selected homes. Five percent (5%) of the houses showed a deficient condition, characterized by the absence of over foundation in accordance with the E-080 standard, as well as problems of settlement, deformation and cracking in the walls. On the contrary, 95% of the houses presented a regular state, in which some failures and cracks were observed that did not compromise the structural integrity. In particular, the houses in poor condition showed a lack of knowledge in the execution of the construction as established in the E-080 regulation. In conclusion, this study indicates that most of the dwellings in Shaullo Chico, Baños del Inca, Cajamarca, exhibit a functional state classified as regular, with certain deficiencies that do not seriously compromise their structural system.
DDoS Attack Detection: Strategies, Techniques, and Future Directions
Authors: Vinay Tila Patil
Published: January 2025

Distributed Denial of Service (DDoS) attacks represent one of the most significant threats to network security, capable of causing widespread disruption to digital infrastructures. The potential for extensive damage becomes even more critical when these attacks are executed on a large scale. Numerous research efforts have been dedicated to understanding and mitigating this formidable threat. This study delves into the complex landscape of DDoS attacks, examining a range of strategies proposed for their detection and mitigation. Special attention is given to the exploration of advanced deep learning and machine learning techniques, which have emerged as pivotal in the development of effective defense mechanisms against DDoS attacks. This research offers a comprehensive understanding of the evolving dynamics of DDoS attacks and highlights innovative methodologies, thus contributing to the ongoing discourse on enhancing network security. Additionally, the paper discusses future directions in DDoS detection, aiming to provide a roadmap for researchers and practitioners in the field.
Tiga Pilar Kinerja Guru dalam Paradigma Peter Senge di Lembaga Pendidikan Katolik
Authors: Dadi Kanisius Komsiah , Sumarni Ria Asep , Japar Muhammad , Herdiati Dian
Published: January 2025

Artikel ini membahas pentingnya membangun tiga pilar komitmen, kepuasan, dan loyalitasguru dalam meningkatkan kinerja di lembaga pendidikan Katolik, mengacu pada paradigma pembelajaran organisasi Peter Senge. Penelitian ini bertujuan untuk mengeksplorasi bagaimana ketiga pilar ini dapat diintegrasikan dalam praktik pendidikan untuk mendorong kinerja guru yang lebih baik. Metode yang digunakan adalah pendekatan metode kuantitatif. Survei dilakukan terhadap guru di enam Sekolah Katolik untuk mengukur jumlah guru yang memiliki komitmen, kepuasan kerja, dan loyalitas. Data dikumpulkan menggunakan google form dan dianalisis dengan teknik analisis dekriptif. Hasil penelitian menunjukkan bahwa tingginya jumlah guru yang memiliki komitmen kuat berkontribusi pada kepuasan kerja yang lebih baik, yang pada gilirannya meningkatkan loyalitas guru terhadap institusi. Selain itu, penerapan prinsip-prinsip pembelajaran organisasi Senge, seperti visi bersama dan pembelajaran berkelanjutan, telah terbukti memperkuat ketiga pilar tersebut. Temuan ini memberikan rekomendasi bagi pengelola lembaga pendidikan Katolik untuk menciptakan lingkungan yang mendukung pengembangan komitmen, kepuasan, dan loyalitas guru sebagai langkah strategis dalam meningkatkan kinerja kelembagaan.
Significados que otorgan terapeutas ocupacionales a la formación intercultural en migración latinoamericana.
Authors: Vega Barría Celia , Seguel Pino Javiera , Terán Cifuentes Fernanda , Ortiz Flores Ellen , Vera-Angulo Rodrigo , Sepúlveda Carrasco Cristóbal
Published: January 2025

El objetivo de esta investigación es conocer el significado que se le otorga a la formación intercultural en migración Latinoamericana, a partir de la percepción de los Docentes Terapeutas Ocupacionales. Para ello, se realiza la investigación desde una metodología cualitativa, un enfoque fenomenológico, se realizan entrevistas semiestructuradas para recopilar la información de los sujetos de estudio, las cuales a través de una malla categorial permite aplicar técnicas para el análisis de información y datos recogidos desde las entrevistas. Dentro de la investigación se cuenta con la participación de 5 sujetos de estudio, todos Docentes Terapeutas Ocupacionales de la ciudad de Concepción, los cuales han trabajado con población migrante Latinoamericana. Los principales resultados indican que existe una diversa compresión sobre la interculturalidad, la cual se sitúa desde un marco de respeto y validación. Además, de la percepción hacia el sujeto migrante Latinoamericano, donde esta perspectiva se sitúa a la existencia de una diferencia concreta, mencionan, entre quienes son migrantes Latinoamericanos en nuestro país y los entrevistados, asociado a privilegios y condiciones dentro del país. Por último, se mencionan acciones fundamentales para la docencia e intervención en migración Latinoamericana, donde considera una intervención situada y mayor experiencias de prácticas, para comprender el cotidiano que involucra a la interculturalidad y migración Latinoamericana.
In vitro antifertility evaluation of n-hexane seed extract of Ricinus communis Var Minor (RICOM 1013-J) on rabbits’ fallopian tube
Authors: Ayuba Clagba Sanni  , Olusayo Moritiwon  , Timothy Olugbenga Ogundeko  , Mamzhi Seljul C. Ramyil  , Paul Amos Bassi  , Francis Kanayo Okwuasaba
Published: January 2025

Natural products used as contraceptive agents among indigenous communities for child spacing are pointers to the ethnopharmacological relevance of medicinal plants, including the seed of Ricinus communis var minor (RICOM 1013-J) popularly used by the tribal women in Bassa Local Government Area of Plateau State, Nigeria. Confirmatory studies on the efficacy and safety of RICOM 1013-J) using different models to further authenticate this property scientifically have become imperative. The study aimed to further evaluate the contraceptive mechanism of action of RICOM 1013-J using the rabbit’s fallopian tube. The effect of pre-treatment with n-hexane extract of RICOM 1013-J on isolated rabbits’ fallopian tube was evaluated after days: 10, 30, 60, and 90 after which uterotonic drugs (Acetylcholine, Oxytocin, Misoprostol, Ergometrine, and KCl) were used to study the activity and response of the isolated rabbits’ fallopian tissue. A time-dependent alteration of the contractile profile of the rabbits’ fallopian tubes as a result of pre-treatment with a single oral dose of RICOM 1013-J (30 mg/kg) with a remarked abolishment of the normal rhythmicity of the rabbit’s fallopian tube.
The antifertility efficacy of RICOM 1013-J is re-established owing to its contraceptive mechanism of action in the fallopian tube activity for over five gestation periods in rabbits.
Miopatía paraneoplásica secundaria a colangiocarcinoma: a propósito de un caso
Authors: Quintero Fuentes Carolina , Ayala Vergara Camila , Avello Medrano Marian
Published: January 2025

Introducción: Las miopatías inflamatorias idiopáticas (MII) son un grupo poco frecuente de enfermedades que se manifiestan principalmente con afectación muscular. Se ha descrito su asociación con neoplasias, siendo las más frecuentes el adenocarcinoma gastrointestinal, pulmón y mama. El colangiocarcinoma (CCA) es una neoplasia poco frecuente originada a partir de las células epiteliales de los conductos biliares, cuya principal manifestación es el síndrome colestásico.
Presentación del caso: Paciente femenina de 74 años presenta cuadro de un mes de evolución de coluria, acolia, ictericia, prurito generalizado, baja de peso significativa y debilidad muscular proximal que progresa hasta la postración. Al laboratorio destaca patrón colestásico con hiperbilirrubinemia de 16.9 mg/dL de predominio directo; Tomografía Computarizada de tórax, abdomen y pelvis evidencia dilatación de vía biliar intrahepática y engrosamiento parietal de vía extrahepática; Colangioresonancia describe lesión sospechosa de CCA Bismuth IV. Dado estado funcional de la paciente y nivel de compromiso de la vía biliar se determina inicialmente manejo paliativo.
Evaluada por Reumatología dado sospecha de MII paraneoplásica, se complementa estudio con creatinina-quinasa (CK) 1257 mg/dL, electromiografía con patrón miopático y panel de miositis negativo, descartando origen autoinmune. Se inician corticoides sistémicos logrando recuperación completa de movilidad. Ante evolución favorable, se realiza biopsia endobiliar que confirma colangiocarcinoma, reafirmando asociación entre miopatía y neoplasia.
Discusión: La importancia de sospechar una miopatía paraneoplásica en pacientes con neoplasia activa y debilidad muscular, radica en la posibilidad de optimizar el estado funcional, permitiendo ampliar el manejo neoplásico para mejorar la calidad de vida de los pacientes.
¡Extra, Extra! Una matriz metodológica para estudiar la jerarquía noticiosa online
Authors: Gómez-Wagner María Celeste
Published: January 2025

Bajo el enfoque de la agenda setting, este artículo presenta un instrumento metodológico que operacionaliza el concepto de relevancia noticiosa en clave digital. En específico, se sitúa en el orden de los contenidos periodísticos online y hace foco en la jerarquía noticiosa como uno de los aspectos considerados para el estudio de la relevancia mediática. En función de ello, presenta una matriz de análisis organizada en dos familias de variables de tipo formal. Para la ejemplificación de su implementación, expone los resultados de su aplicación —mediante la técnica del análisis del contenido— a un corpus de 449 noticias referidas a las elecciones argentinas del año 2019. Los datos permiten validar algunas variables y desechar otras, en función de ajustar el instrumento. La matriz pretende ser un punto de partida para posteriores investigaciones que adicionen nuevas familias de indicadores según la especificidad de cada caso de estudio.
Rutinas de ejercicios en revistas chilenas del siglo XX: Pedagogía visual para las jóvenes
Authors: Saa-Espinoza Marcela
Published: January 2025

Este artículo analiza imágenes de rutinas de ejercicios aparecidas en ocho revistas femeninas y juveniles chilenas entre los años 1936 y 1996, dando cuenta de los significados de su representación sobre la cultura física, el deporte, las mujeres y la juventud. Las revistas ilustradas y sus imágenes se expandieron con gran rapidez en el mundo occidental y, con ello, posibilitaron prácticas deportivas y de cuidado físico así como se constituyeron como una estrategia de aprendizaje respecto al cuerpo y los contornos autorizados de la cultura física femenina. Esta investigación de carácter cualitativo indagó en las representaciones y discursos que la rutina de ejercicios promovió durante casi un siglo y, a la luz del análisis, es posible sostener que tal imagen forma parte de las iconografías del deporte moderno, reproduciendo ideas sobre la espacialidad y el ejercicio de las jóvenes gracias al enorme potencial pedagógico de su lógica secuencial.
Enseñar derecho procesal laboral utilizando un enfoque experiencial: Reflexiones de un aula en Bogotá
Authors: Rodríguez Morales Andrés
Published: January 2025

Durante el primer semestre de 2023, me fue asignado el curso de Derecho Procesal Laboral en la Universidad de los Andes, Colombia, y me propuse rediseñar el curso con el aprendizaje experiencial como eje central del curso. Era la primera vez que dictaba un curso con ese enfoque pedagógico. En este artículo, analizo mi propia experiencia diseñando y dictando ese curso facultativo, y presento los resultados de la evaluación cualitativa y cuantitativa que los estudiantes le dieron a mi desempeño. Expongo los retos de su implementación (mayor carga de trabajo para estudiantes y profesor, necesidad de una retroalimentación muy programada, necesidad de tiempo para trabajar en grupo con sesiones de clase cada vez más cortas), así como sus ventajas (interacción más personal con los estudiantes, trabajo en equipo bajo supervisión, resolución de problemas, aprendizaje significativo). Concluyo reflexionando sobre qué ajustes se deberían hacer al curso la próxima vez que lo dicte.
Clínica jurídica y vinculación con el medio: Una relación necesaria para la enseñanza del derecho
Authors: Pincheira Germán , Inostroza Reyes Camila , Lapostol Diego
Published: January 2025

Este estudio aborda dos grandes temáticas estrechamente vinculadas entre sí. La primera refiere a un análisis de carácter teórico de la oportunidad que representa la participación en proyectos interdisciplinarios con el entorno asociados a la vinculación con el medio en el proceso formativo de aprendizaje de los estudiantes de Derecho que se encuentran insertos en una clínica jurídica universitaria, lo que permite su desarrollo integral, al visualizar actitudes que garanticen un promisorio ejercicio profesional. Por otra parte, el estudio hace alusión al aspecto empírico, al mostrar el paso a paso, la ejecución y el impacto de un proyecto interdisciplinario, describiendo la intervención realizada en la comuna de Santa Juana, en la región del Biobío, Chile, que tuvo por principal objetivo incentivar la recuperación de los proyectos de vida familiar y económica de catorce familias que fueron afectadas por los incendios de 2023. El modelo de intervención planteado permite al estudiante adquirir las competencias necesarias para relacionarse con el entorno, a través de un aprendizaje situado fuera del aula, que permite fortalecer la vocación al conectarse con las comunidades que presentan diversas problemáticas, así como también desarrollar habilidades de ciudadanía y actitudinales que son clave para el mundo laboral actual y futuro.
Brechas de género en las autopercepciones sobre habilidades de investigación en estudiantes de Derecho de dos universidades regionales chilenas
Authors: González Marino Israel , Veas Alfaro Maribel , Covarrubias Apablaza Carmen Gloria
Published: January 2025

Este estudio examina las diferencias de género en las percepciones de habilidades de escritura e investigación de estudiantes de Derecho de dos universidades regionales chilenas. A partir de un diseño preexperimental de pretest-postest con treinta y ocho participantes, se midieron las autoevaluaciones de las y los estudiantes en el marco de asignaturas específicas de investigación jurídica. Los resultados indican que, aunque hay mejoras en las habilidades de investigación, que se evidencian en diferencias significativas, estas no se observan en las habilidades de escritura. Además, las mujeres tienden a autoevaluarse más bajo que los hombres en ambas habilidades. Las diferencias de género son consistentes con la literatura sobre brechas de género en la academia, en las facultades de Derecho, así como en estudiantes de Derecho. Los datos destacan la importancia de integrar la perspectiva de género en la formación jurídica para enfrentar estas brechas.
Direito do trabalho e atendimento das necessidades humanas básicas: Um olhar a partir dos direitos fundamentais
Authors: Almeida Cleber Lúcio de , Almeida Wânia Guimarães Rabêllo de
Published: January 2025

O direito do trabalho pode ser examinado na perspectiva da sua relação com a dignidade humana, justiça social, cidadania, democracia e legitimação do sistema capitalista de produção, mas pouco tem sido dito sobre a sua eventual relação com a satisfação das necessidades humanas básicas dos trabalhadores e as trabalhadoras, tema que é enfrentado neste artigo, no qual é adotado o método indutivo, subsidiado pela revisão bibliográfica e documental. As pesquisas desenvolvidas ao longo do artigo levaram a concluir que existe uma estreita vinculação entre o direito do trabalho e a satisfação das necessidades humanas básicas das trabalhadoras e os trabalhadores brasileiros e das suas famílias, e que estas necessidades são definidas pela Constituição da República de 1988 ao atribuir direitos fundamentais aos trabalhadores e às trabalhadoras.
HISTORIA TECHNOLOGII I KATALIZY NA UMCS
Authors: Borowiecki Tadeusz , Ryczkowski Janusz
Published: January 2025

he article presents the most important facts related to the history and scientific activities of the Department of Chemical Technology. The activity and development of the unit was and is closely related to the functioning of the Faculty of Chemistry at Maria Curie-Sklodowska University and cooperation with the economic environment and other research units. More than six decades of history are not only the scientific achievements of the team, but also the individual development of individual employees, as mentioned in the supplement to this text
HISTORIA CHEMII TEORETYCZNEJ W UNIWERSYTECIE MARII CURIE- SKŁODOWSKIEJ W LUBLINIE
Authors: Borówko Małgorzata , Narkiewicz-Michałek Jolanta
Published: January 2025

he article describes the history of research in the field of theoretical chemistry at UMCS. The organizational structures within which this research was conducted were discussed. The most important research topics are briefly presented. The stages of the scientific career of employees of the Department of Theoretical Chemistry and the Department for the Modelling of Physicochemical Processes are described. The professional achievements of these scientists, awards and distinctions received by them are listed
Analysis of the Impact of Interview-Based Feature Selection on the Performance of Machine Learning Algorithms in Mental Health Disorder Classification
Authors: Hendrick
Published: January 2025

Mental health issues in the workplace have become an increasingly important concern, particularly in the high-pressure environment of the information technology industry. This study aims to evaluate the impact of feature selection based on interviews on the performance of machine learning models in classifying mental health disorders. The dataset used is sourced from Open Sourcing Mental Illness (OSMI), which consists of various features related to employees' mental health conditions, previously used without feature selection in prior research. Through an interview with an experienced Human Capital professional with a psychological background, relevant features were selected based on domain expertise. Subsequently, machine learning models, namely Random Forest and XGBoost, were trained using two scenarios: without feature selection and with feature selection. The results of the study indicate that feature selection based on interviews can improve model accuracy by 1.67% for Random Forest and 0.67% for XGBoost. These findings emphasize the importance of integrating psychological insights into the data processing to produce more relevant and efficient models. This research provides practical contributions to assist companies in implementing early detection of mental health disorders effectively.
La prueba en los juicios laborales por despido intempestivo
Authors: Navarrete-Montes Diego Stefano , Piloso-Moreira Verónica Alexandra
Published: January 2025

La instancia judicial establece la influencia de los elementos probatorios en la determinación de la legalidad del despido intempestivo en los juicios laborales. De ahí que, en este estudio se analiza el despido intempestivo, diferenciando, entre el debidamente justificado y el injustificado que vulnera derechos de los trabajadores. Asimismo, se examina el rol de las pruebas en los juicios, incluyendo: documentación contractual, correspondencia electrónica, informes de evaluación de desempeño y testimonios de los testigos. Los resultados obtenidos a través de encuestas y entrevistas aplicadas a profesionales del derecho laboral ofrecen datos sobre la eficacia de las pruebas en la resolución de casos de despido intempestivo. Asimismo, se realizó un análisis exhaustivo de sentencias judiciales para identificar el impacto de la prueba en las decisiones judiciales y en la resolución de conflictos laborales. Se concluye que la valoración adecuada de las pruebas es fundamental para garantizar el respeto al debido proceso en los juicios por despido intempestivo y se destaca que la prueba debe ser evaluada conforme a los principios de legalidad, pertinencia y coherencia, para determinar si el despido se ajusta a los criterios establecidos en la ley.
Impact of Mixture Ratio on Bio-Composite Material from Bamboo and Recycled Polyethylene Terephthalate (PET)
Authors: Ojetoye Abiodun Ayodeji , Ilori Olutosin Olufisayo , Iwedi Shalom Chitom , Obiechefu Kelechi Valentine , Okezue Precious Arinze , Feranmi Kareem
Published: January 2025

The study investigated the impact of mixture ratio on various physico-chemical and mechanical properties of a bio-composite material made from bamboo and recycled polyethylene terephthalate (PET). The bamboo and recycled PET bottles were sourced from Adeleke University, Ede research farm and waste buckets in male hostels of the same university, respectively. The weight percentages (wt%) of bamboo and PET powder were adjusted as follow: 60 wt% bamboo and 40 wt% PET, 65 wt% bamboo and 35 wt% PET, 70 wt% bamboo and 30 wt% PET, 75 wt% bamboo and 25 wt% PET, and 80 wt% bamboo and 20 wt% PET, respectively. The findings indicate that as the mixture ratio of the constituents varied, the composite samples exhibited a decrease in density (from 915.45 – 819.24 kg/m3), flammability (from 25.84 – 19.93 s), hardness (from 88.55 – 55.57 BHN), compressive strength (from 14.78 – 9.10 N/mm3), and wear resistance (from 0.0096 – 0.0011 cm/cm3). In contrast, the composite exhibited an increase in oil and water absorption rates ranging from 0.0010% to 0.0810% and from 0.0112% to 0.12%, respectively, as the mixture ratio varied. Furthermore, the ratio of the mixture does not impact the acidity or alkalinity of the resulting composite material. Hence, the mixture ratio that yields optimal attributes result in excellent performance, tailored to the specific requirements of industries such as automotive and aeronautics. Finally, the diverse combination of bamboo and PET powders provides a practical approach to creating efficient, environmentally-friendly bio-composite materials suitable for various industrial applications.
Characterization of Rice Husk for Graphene Extraction and Metallization
Authors: Onovo Harrison Okechukwu , Agbeleye Ademola Abiona , Akano Theddeus Tochukwu , Oloyede Olamilekan Razak , Oyegbami Solomon Oaolapo , Amoo Emmanuel Oluwatimilehin
Published: January 2025

Rice husk, an underutilized agricultural waste product, serves as a potential precursor for graphene synthesis. This study focuses on synthesizing and characterizing graphene through the chemical exfoliation method, employing advanced analytical techniques to explore its potential applications in metallization. Graphene was produced by chemically activating rice husk ash (RHA) with potassium hydroxide (KOH) at 800 ºC. The extracted graphene underwent analysis using various techniques. X-ray Diffraction (XRD) confirmed the material's crystalline nature and graphitic structure. Fourier-Transform Infrared Spectroscopy (FTIR) identified typical functional groups present in the synthesized graphene. Raman Spectroscopy revealed significant defects and confirmed that the graphene consists of single or few-layer thin sheets. Transmission Electron Microscopy (TEM) showed the presence of thin graphene sheets and nanoparticles with sizes ranging from 1.47 nm to 5.80 nm. Ultraviolet-Visible Spectroscopy (UV-Vis) confirmed electronic structure and optical properties, essential for metallization. X-ray Fluorescence (XRF) confirmed the purity of the graphene, while Brunauer-Emmett-Teller (BET) analysis revealed a high specific surface area, making the material suitable for surface-based applications. Electrical conductivity tests demonstrated good conductivity in the lower to moderate current range. The study underscores the potential of rice husk-derived graphene for metallization, offering a cost-effective and eco-friendly synthesis method for industrial and commercial applications.
Development and Performance Evaluation of an Instrumented Hybrid Onion Storage Facility
Authors: Soyoye Babatunde , Okunjoyo Ademola , Aderotoye Adenike
Published: January 2025

Onion (Allium cepa L.) is one of the oldest bulb crops, known to mankind and consumed worldwide. It is valued for its distinct pungent flavour and is an essential ingredient for the cuisine of many regions. This study aimed to develop and evaluate the performance of a refrigerated onion storage facility. The designed facility was simple, efficient, and cost-effective, with a focus on user-friendly operation and packaging of onions in zippered bags. The experiment involved slicing and dicing onions of equal size, which were then placed in zip bags and monitored over a week. The mass of the samples was measured daily to observe the changes. Additionally, laboratory analysis was conducted to assess the proximate composition, phytochemical contents, and heavy metal concentration of the onions. The results showed that the storage facility maintained a cooling rate of 0oC and experienced fluctuations in temperature due to external weather conditions. The relative humidity ranged from 18% to 19%, indicating the coldness of the storage facility. The analysis of the onion samples revealed high moisture content, with values ranging from 80% to 90%. Other compositional parameters such as crude protein, CHO, crude fibre, fat content, and ash content were relatively low. In terms of phytochemical analysis, flavonoid content was found to be relatively high compared to saponin, alkaloid, and tannin contents. Flavonoid content was highest in the raw state of the onion. Heavy metal analysis showed significant differences in the concentrations of iron (Fe), manganese (Mn), and zinc (Zn), while copper (Cu) did not exhibit a significant effect. The developed refrigerated onion storage facility demonstrated promising performance. The proximate composition analysis indicated that before and after storage of the onions, the moisture content and nutrients of onions was maintained. The phytochemical analysis revealed a significant presence of flavonoids, while heavy metal analysis showed varying concentrations of Fe, Mn, Zn, and Cu.
Machine Learning for Health Insurance Prediction in Nigeria
Authors: Ochigbo Victor Enemona , Okunade Oluwasogo Adekunle , Dada Emmanuel Gbenga , Olaniyi Oluyemi Mikail , Oyewande Oluwatoyosi Victoria
Published: January 2025

Health insurance coverage remains critical to healthcare accessibility, particularly in developing nations like Nigeria. This paper focused on predicting the likelihood of medical insurance coverage among individuals in Nigeria by employing four prominent Machine learning techniques: Logistic Regression, Random Forest, Decision Tree, and Support Vector Machine classifiers. The dataset utilized for analysis comprises demographic information, socioeconomic factors, and health-related variables collected from a diverse sample across Nigeria. Four models are trained and evaluated: Logistic Regression widely accepted for its simplicity and interpretability. Random Forest is a robust ensemble learning algorithm capable of capturing complex relationships within the data. The decision Tree model is simple to understand and visualize and the Support Vector Machine model is known for producing a very good classification. Furthermore, the performance metrics uutilized to rate the predictive capabilities of the models are Accuracy, Precision, Sensitivity, F Score, and area under the Receiver Operating Characteristic (AUC & ROC Curve). Additionally, a features importance analysis is conducted for the identification of the dominant factors contributing to the prediction of the spread of medical insurance in Nigeria. The outcome of this paper gives insights in the efficiency of each machine learning models used to forecast medical insurance coverage, and identifying key determinants influencing insurance coverage can assist policymakers and healthcare stakeholders in devising targeted strategies to improve healthcare access and affordability for the Nigerian people.
Enhancing the World Languages Collection
Authors: Younglove April
Published: January 2025

In 2022, the Lake Oswego Public Library adopted a new mission statement: “Together, we inspire discovery and cultivate well-being by welcoming all people to read, learn, and connect." This mission statement inspired the library to plan an expansion of its World Languages offerings. My prior success building a World Languages collection at a California boarding school with an international student body aligned well with the library’s goals. The project ultimately resulted in the creation of a World Languages collection for adults, a significant expansion and upgrade to the children’s World Languages section, and the formation of an inclusive adult World Languages Conversation Group.
Dynamic analysis of a thermally loaded imperfect functionally graded tapered rotating shaft using the differential quadrature finite element method
Authors: Assem Hassan , Saimi Ahmed , Bensaid Ismail
Published: January 2025

The current research paper proposes a numerical investigation of the dynamic behavior of a porous functional graded ceramic-metal tapered rotating shaft using the differential quadrature finite elements method to identify the natural frequencies for modeling and analysis of the structure with appropriate validations. The goal of this paper is to investigate the effect of heat gradients and porosity on the natural frequency of rotation of FG shafts using three-dimensional solid elements, as well as a theoretical examination using the Timoshenko beam mode, which took the gyroscopic effect and rotational inertia into account. The power law hypothesis describes the distribution of functionally graded materials.  Radial temperature distributions are generated using the nonlinear temperature distribution) approach to mimic various thermal conditions. This paper examines the effects of different material laws gradation, porosity and temperature gradient distributions on the fundamental frequencies. On the basis of material qualities, attempts are made to identify suitable explanations for the behaviors. The dynamic behavior of the FG conical rotor system is studied in terms of taper angle and material distribution.
Numerical study of a free surface flow caused by a dam failure
Authors: Tahar Ikni , Ali Berreksi , Lyacine Bennacer
Published: January 2025

The application of numerical modeling of free surface flows to water resources management, environmental and ecosystem protection can be applied for different applications: simulation of flows due to dam failure, simulation of the process of river bed change, simulation of flows and sediment transport, simulation of the evolution of a flood due to high intensity rainfall, etc. In this study, two explicit finite difference numerical schemes with two-stage fractional step and modified two-stage fractional step are used to simulate the dam failure wave. The validation of the results obtained is done against experimental measurements and existing numerical results in the literature specialized in this field of research. These simulation results obtained with the new formulation of the modified two-stage fractional step numerical scheme showed a good fit with the simulated, experimental results and the numerical results of other researchers.
Optimization for a photovoltaic pumping system using nonlinear Backstepping control of induction motor
Authors: Bouguerra Tarek , Zarour Laid
Published: January 2025

This paper presents a nonlinear control strategy for the vector control of induction motors using a robust backstepping controller. To reduce the complex mathematical representation of the induction machine, a multi-scalar model has been employed. The motor, coupled with a centrifugal pump as the mechanical load, is powered by a photovoltaic generator supplemented with a lead-acid battery storage system. The study achieves two primary objectives: ensuring uninterrupted electrical energy production and optimizing the operation of photovoltaic panels at their maximum power point. Excess energy is stored in the battery bank for later use when solar power is insufficient. To maximize photovoltaic energy utilization, a variable step-size Incremental Conductance algorithm for maximum power point tracking has been implemented. The proposed power management system is designed to reliably supply the required power under various environment conditions. System performance is evaluated through MATLAB/Simulink simulations, demonstrating significant improvements, and validating the effectiveness of the approach.
Space-related education in Brazil: the recent creation of Astronautical Engineering courses and other patterns
Authors: Cabello Andrea Felippe , Melo Michele Cristina Silva , Freitas Lúcia Helena Michels de
Published: January 2025

The goal of this paper is to describe how space-related engineering is developing in Brazil. This is a very recent development, especially at undergraduate level. We posited three main reasons for the recent expansion of astronautical engineering in Brazil: i) the expansion of the Brazilian Higher Education system as a whole; ii) the specialization of departments in engineering, with the creation of more specialized majors, first at graduate and then at undergraduate level; iii) the possible increasing demand for space-related engineering that will most likely grow in the following years due to new applications and new private players in the sector. We use data both from undergraduate and graduate courses in Brazil and compare it to stylized facts in the space sector, such as its geographical clustering and strong connection to government institutions. Most of the graduates come from very few institutions, with a strong background in engineering. We contributed to the literature by filling the existing gap of documenting the development of the field of space-related education, and framing its development as part of larger context, be it in the space sector or in the education system development of Brazil. This is important, especially in light of the emergency of new opportunities in the sector, that are much more private-sector oriented and rely on a globalized and skilled workforce. That calls for an integration of educational, innovation and industrial policies that would provide both human capital and private sector support for the country to be able to meet these new challenges and catch up in a very technology-intensive sector.
Research on Innovative Measurement of Chinese Urban Digital Economy Development and Its Impact on Enterprise Export Resilience
Authors: Liu Jiaqi
Published: January 2025

With the widespread application of digital technology, the digital economy has become a new engine for promoting economic development in various countries. However, there are deficiencies in measuring the level of urban digital economy development in China, and the impact of urban digital economy on micro enterprises is still unknown. Therefore, this study aims to provide a scientific and comprehensive method for measuring the level of urban digital economy development, and explore the impact mechanism of urban digital economy development on export resilience from the perspective of trade resilience of export enterprises. Research has found that the construction of indicators for the development level of urban digital economy should coordinate three aspects: digital infrastructure, digital industry, and digital governance; The impact of urban digital economy development on the export resilience of enterprises is mainly achieved through export structure, export diversity, and improving their multi-faceted dynamic capabilities. This study provides a comprehensive measurement method for the development level of urban digital economy and elucidates the relationship between urban digital economy and enterprise export elasticity. It not only provides reference for related research, but also provides inspiration for micro enterprises to apply digital technology to improve export resilience.
Problems and Suggestions in The Operation and Management of Township Sewage Treatment Projects
Authors: Duan Chunyi
Published: January 2025

In the context of current environmental protection and sustainable development, township sewage treatment projects are important measures to improve rural environmental quality and protect water resources. The effectiveness of their operation and management is directly related to the success of the projects. This study delves into the various problems encountered during the operation and management of township sewage treatment projects and proposes practical solutions to these issues, aiming to provide useful references and insights for the efficient operation and management of such projects in China.
Preliminary Investigation of Fish Diversity in Huayang River based on eDNA Technology
Authors: Wang Jiemiao , Tang Wenqiao
Published: January 2025

Environmental DNA (eDNA) was used to study fish biodiversity in the Huayang River to identify new ways to monitor and protect fish diversity. 23 sites were set up in the Huayang River on 23 September. Analytical procedures were used to detect fish diversity, including water sampling, eDNA extraction, genetic marker amplification and sequencing, and database comparison. 49 fish species were identified, classified into six orders, 12 families and 34 genera. The most common fish were the big-finned goby, group-headed pomfrets, yellowfin spiny goby, short-bearded goby and coloured rocky carp. H18 and H18 are the most prevalent species globally. The diversity index showed that H18 and H23 had the highest fish diversity, while H5 had the lowest. eDNA technology can rapidly ascertain fish diversity and distribution in the Pearl River. Combining eDNA with traditional monitoring methods can enhance fish biodiversity data.