bluuebunny/crossref_metadata_2025 huggingface dataset:
Integration of STM32 Microcontroller with Arm Cortex Architecture into the 8-Bit Measurement Circuit Customized for Real-Time Data Acquisition on Propeller Shaft to Increase Data Speed and Accuracy
Authors: ALDEMIR Oguzhan , TARAKCI Sedat , OZDEMIR Serhan , ISIK Efe
Published: December 2023

Propeller shafts transmit torque and high-speed rotational movement from the engine to related equipment. Expected propeller shaft functions are calculated and designed by using an analytical and numerical approaches. The verification tests are significant in that they provide feedback to the design and development processes. Therefore, acquiring accurate data from power transmission equipment is becoming even more important. This paper focuses on the study of circuit boards customized for use in the validation tests of the propeller shafts. It should be noted that these measurement circuits were integrated on the propeller shafts. These measurement circuits were used to acquire data such as torque, temperature, etc. in real time. Especially with instantaneous signals such as torque, data loss can occur due to low microcontroller resolution. Therefore, it was aimed to develop to the microcontroller to 32-bit resolution from 8-bit resolution to increase data speed and accuracy. As the first step, an INA125P operational amplifier was installed to amplify the low voltage values gathered from the gages and the sensors. The gain value of the amplifier was calculated in order to provide the highest data resolution and sensitivity. And then, ADS1115 analog to digital converter circuit with a rate of 860 samples per second and 16-bit resolution was used to interpret the analog data. A low pass filter was installed to remove noise from the output signal. Embedded code was also locally developed for the hardware installed. The system was calibrated on a validated test rig. Real-time torque and temperature data were acquired from the propeller shaft. It is observed that compared to the previous 8-bit system, the data accuracy and integrity from the new 32-bit board has increased by a factor of 5 to 100 Hz. The collected data was found to be 99.4% compatible with the validated test rig data.
Numerical Simulation on Microwave Melting of Hastelloy C-276
Authors: REDDY Kadapa Vijaya Bhaskar , SHANKAR K.v. Hari , GUDIPADU Venkatesh
Published: December 2023

Melting of metals is of utmost importance in the manufacturing industry as it is the primary manufacturing process to obtain the desired shape and size. microwave melting is a novel technique that uses electromagnetic wave radiation to heat materials. In the present work, the melting of Hastelloy C-276 inside a multimode microwave applicator operating at 2.45 GHz and 900 W input power, is explored in numerical and experimental. This results in a significant reduction in processing time and leads to lesser material wastage. The distribution of temperature, electric field, and resistive losses was analysed to understand the microwave melting of the Hastelloy C-276 sample. The study revealed that the melting time taken was ~440 seconds for microwave melting of Hastelloy C-276.
MARKETPLACES AS A KEY DRIVER OF GLOBAL E-COMMERCE
Authors: Yarova Inessa , Yurchenko Anastasia
Published: December 2023

Currently, e-commerce is becoming a modern challenge to accelerate the development of the global economy. This requires the introduction of qualitatively new approaches to the strategic management of activities using information technology. The purpose of this article is to study the key issues, features and trends in the development of e-commerce in the context of international business digitalisation on the example of international online marketplaces.This paper analyses the risks and benefits, distribution logistics issues for the development of e-commerce, and its positive and negative impact on trade in general. It is determined that today the pace of development of e-commerce is very fast, significantly exceeding the pace of development of traditional trade.An important indicator of a successful e-commerce business strategy is a clear vision and implementation of the strategy of involving marketplaces in the trading strategy. A clear understanding of which marketplace best suits the needs of the business and competent implementation significantly increases the chances of making a quick profit in online trading. The article notes that the business model of marketplaces is considered to be promising, as it is beneficial for both the seller and the buyer. This paper considers the key and most well-known globally recognized marketplaces such as Amazon, eBay and Etsy, their main advantages and disadvantages, comparative characteristics of marketplaces and how to effectively integrate products into these tools, as well as the future implications of these concepts for distribution logistics in the context of e-commerce.
ОСВІТА І НЕРІВНІСТЬ НАСЕЛЕННЯ: ВЗАЄМОЗВ’ЯЗКИ Й СУПЕРЕЧНОСТІ
Authors: Путицький Антон
Published: December 2023

In the theory of human capital, education (as well as health) is the main object of investment, which ensures an increase in labour productivity, and therefore, an increase in the volume of goods and services, on the one hand, and an increase in the income of a working person, on the other. This article continues the research of leading Ukrainian and foreign scientists to identify the main trends that determine the impact of education on population inequality.The main purpose of the article is to outline and substantiate the interrelationships and contradictions between education and inequality. For this, educational inequality was considered as inequality of access to education, inequality of access to quality education, inequality of educational chances or opportunities, inequality of educational standard, and inequality of educational results. In this context, it is determined that a significant factor influencing inequality is the dominance of instructions for obtaining higher education and the competitiveness of educated persons in the labour market. As a result of the conducted analysis, it was established that the presence of higher education not only significantly reduces the risk of poverty and increases the probability of obtaining average incomes but also significantly affects the way of life, in particular, consumer behaviour. Quality education is one of the main factors of financial security. Significantly higher monetary incomes of educated people force the latter to resort to such types of economic activity as work in a personal subsidiary economy less. The conducted analysis makes it possible to state that a higher level of education of at least one member of the household, and especially its head, is a guarantee of a lower risk of poverty. Thus, education today can be defined as the most effective and promising factor in reducing the risk of family poverty. The article proves that public investment in the education of their children is recognized as the most promising and profitable investment in their future. The study of the phenomenon of educational migration showed that it brings much more advantages to the recipient countries than to the donor countries, and therefore the inequality of the population in the donor countries will always be higher than in the recipient countries.
ОЦІНКА ЕКОНОМІЇ СИСТЕМИ ЕЛЕКТРОННИХ ПУБЛІЧНИХ ЗАКУПІВЕЛЬ: КЕЙС PROZORRO 2018-2022 РР.
Authors: Длугопольський Олександр , Данилюк Ірина
Published: December 2023

The paper examines savings in the system of public cigarette lighters in 2018-2022 in terms of key product groups: gasoline, flour, eggs, potatoes, milk, sugar. It is substantiated that the introduction of ProZorro electronic competitive procedures has a positive effect of savings on the analyzed types of products in almost all the studied years due to the fact that the purchase price was ultimately lower than the average market prices. The median margin has shown unstable values throughout all years, this situation is explained by the dispersion of prices and the variety of purchases. In general, according to the results of the study of selected homogeneous goods, which collectively constitute 0.007% of all purchases by the amount of concluded contracts for 2018-2022, it turned out that the electronic procurement system of ProZorro gives a significant effect of savings, and the cumulative difference between the actual cost of the purchase and the market value - increases starting from 2021. In the conditions of monopolization of prices, the economic effect of using ProZorro is much weaker or absent, and the reduction of corruption rent cannot always be achieved exclusively at the expense of procurement transparency, because in some cases there is a threat of non-competitive bidding. That is why competitiveness through the ProZorro system is the best way to save money in the budget sphere.
VIRTUAL COMMUNITY OF PRACTICE FOR LOCAL DEVELOPMENT: DIVERSE CONTEXT AND PARTNERSHIP FOR ELEARNING IN PROJECT MANAGEMENT
Authors: Katernyak Ihor , Loboda Viktoriia , Strotskyy Ruslan , Мamatova Тetiana
Published: December 2023

The purpose of this paper is to generate an in-depth and comprehensive understanding of knowledge management processes in the virtual Community of Practice (vCoP) and to propose a framework for organising an eLearning process in project management for local development. The vCoP was created on the web platform for exchanging best practices and learning within a group of professionals with specific experiences and diverse learning needs. For 10 years, the vCoP annually brought together from 600 to 1,000 participants from different regions and organisations who defined problems, learned from the experience of others, took e-courses, worked in the virtual common space on developing project concepts, and prepared together a wide “repertoire” of new knowledge.The paper presents a study of operational processes of knowledge management in the vCoP and is based on primary datasets obtained within the period of 2018-early 2022 in terms of a joint domain, participatory membership and sense of community, knowledge sharing and learning, action, and construction of new knowledge. We present the findings of a study where the hypothesis was a combination of Community of Practice and eLearning into one system in order to quickly comprehend the problem that corresponds to the crisis, find solutions to the problem, and understand the benefits of their implementation while actively communicating with potential customers, and present project concepts to potential stakeholders, partners, and investors in order to mobilise resources.Given the challenges that Ukraine and partner countries are currently overcoming, in the post-war period, the proposed CoP approach based on a web platform can be used for creating public-private partnerships, for ensuring public participation in governance, in particular, for testing the efficiency of the ideas included in strategies and corresponding portfolios of programmes and projects to ensure resilience, revitalisation and development of territories and communities.
Curriculum Exit and Its Alignment To Senior High School Offerings In Schools Division Of Isabela: A Basis For Policy Program
Authors: Colobong Larina
Published: December 2023

This study aimed to compare and analyze the curriculum exit path of first to fourth batches of SHS graduates in Schools Division Office of Isabela and tried to come up with an input to localized policy guidelines and monitoring tool on senior high school program. Data gathered and limited only to the SHS Tracking System of SDO Isabela.
Based from the result, most of the Senior High School graduates in Schools Division Office of Isabela went to college: 92.23% (2021), 91.79% (2020), 89.20(2019) and 88.33% (2018) followed by employment, middle-level skills and entrepreneurship.
As to alignment, most of the respondents who took their college from Batches 1 to 4 was aligned with their strand with a percentage ranges from 73 to 84, thus, the 27% to 30% was not aligned while most of who applied for a job had no alignment to their strand.
For the implications of curriculum exit to the existing program offerings, it was revealed that most of the SHS graduates in SDO Isabela had a related course in college except in GAS strand especially in Legislative District 2 and Arts and Design Track wherein most of them took in college with no alignment while TVL Track has a close percentage between aligned and not aligned. However, those who employed had a work not related in their strand. This is congruent to the report of Sec. Sara Duterte (2023) that SHS curriculum is effective and work in progress.
However, the reasons why some of the Senior High School Graduates did not proceed in college was due to Financial Problem, Early pregnancy and Death.
The Life Stories of Teacher Leaders: A Qualitative Content Analysis
Authors: Reccion Fina-Zenia
Published: December 2023

The teacher leader creates a path through which the students achieve their valued outcomes (high education performance). The qualitative content analysis was used in the investigation. The application of correct inference and interpretation in qualitative content analysis allows for the raw data into manageable themes. 10 participants were recruited in the study. Each interview conducted in their own office in the school. Semi-structured interviews were done based on the general questions asked with the key informants. This set of interview guides were evaluated twice by two experts in qualitative research. All interviews were recorded and then transcribed by the researcher.
Seven themes emerged in this study: questing for quality education through continuous involvement in curriculum development, nurturing an empowering and inspiring school climate, leveraging partnerships, networks and linkages with the various stakeholders, exemplifying good leadership skills, amplifying open and clear communication, developing systematic process of classroom observation and setting attainable standards outcomes and expectations for students and teachers.
This study revealed the actions of teacher leaders working at Quirino National High School about teacher leadership skills and their best practices. The seven themes show that teacher leaders are highly motivated to enhance student achievement. Stakeholders in education should place significant emphasis on promoting classroom teacher leadership.
 Thus, education administrators should design effective strategies to ensure that the current crop of teachers understands the importance and role of teacher leaders. By reflecting on these practices, teachers will be inspired to become teacher leaders in their own field.
Hubungan antara Keterlibatan Karyawan, Budaya Organisasi dan Stress Kerja terhadap Kinerja Karyawan
Authors: Amalia Aisya , Novie Muhafidhah
Published: December 2023

Pengaruh hubungan keterlibatan karyawan, budaya organisasi, dan stress kerja terhadap kinerja karyawan di dunia bisnis yang kompetitif adalah suatu perbincangan manajemen sumberdaya manusia yang semakin menarik dan relevan.  Penelitian ini bertujuan untuk mengetahui pengaruh keterlibatan karyawan, budaya organisasi dan stress kerja terhadap kinerja karyawan. Penelitian kuantitatif kausal ini menggunakan studi kasus tunggal pada pada PT. Tiga Permata Ekspress, Sidoarjo. Hasil penelitian menunjukkan bahwa variabel keterlibatan karyawan tidak berpengaruh terhadap kinerja karyawan. Variabel budaya organisasi dan variabel stress kerja berpengaruh terhadap kinerja karyawan. Stress kerja terbukti dapat menjadi salah satu faktor yang berimplikasi negatif dapat menurunkan kinerja karyawan.

The influence of the relationship between employee engagement, organizational culture, and work stress on employee performance in the competitive business world is an increasingly interesting and relevant human resource management discussion. This research aims to determine the influence of employee involvement, organizational culture and work stress on employee performance. This causal quantitative research uses a single case study at PT. Tiga Permata Express, Sidoarjo. The research results show that the employee involvement variable has no effect on employee performance. Organizational culture variables and work stress variables influence employee performance. Work stress has been proven to be a factor that has negative implications that can reduce employee performance.
Revitalizing The Higher Education Curriculum Through An Artificial Intelligence Approach: An Overview
Authors: Sanasintani Sanasintani
Published: December 2023

Background. Higher education is faced with the challenges of global change which requires innovative curriculum adaptations. In this context, this research aims to develop practical guidelines for higher education institutions in implementing curriculum changes by utilizing artificial intelligence (AI).
Purpose. The aim of the research is to develop practical guidelines for higher education institutions in order to implement innovative curriculum changes and responsive to global change.
Method. Research methodology uses a quantitative approach with survey design. Identify key variables, including students’ understanding of AI, preferences for AI learning methods, and their views on its impact on the learning experience. The research process involved developing a comprehensive survey instrument with questions designed to gain in-depth insight into student perceptions. The research sample consisted of 20 respondents from higher education program students who were randomly selected. Surveys can be carried out online or through face-to-face interviews.
Results. Data analysis involves statistical methods, including descriptive analysis, categorization, and coding to identify patterns in student responses. The survey results reflect a positive level of understanding (70%) and confidence (80%) of students in the role of AI in improving the quality of learning. There is a group that is neutral (20%), indicating the need for further understanding.
Conclusion. The survey results create a comprehensive picture of student perceptions and preferences for AI in higher education. Most respondents showed positive acceptance of this technology, with about half expressing a preference for learning involving AI. Overall, this research provides a foundation for higher education institutions to design effective communication and expectation management strategies to ensure optimal acceptance and participation in AI implementation.
The Role of Artificial Intelligence-Based Recommendation Systems in Selection of Courses for Students
Authors: Akbar Zulfikri , Sopandi Encep , Badruzzaman Badruzzaman , Khalik Muh Fihris
Published: December 2023

Background. Modern higher education institutions are faced with complex challenges in developing curricula that suit students’ needs and interests. To overcome this challenge, artificial intelligence-based recommendation systems are an attractive alternative. This system can help students in selecting courses, providing suggestions that suit their interests and needs.
Purpose. This research aims to understand students’ experiences and views on recommendation systems in selecting courses in higher education, with a focus on system effectiveness, level of student trust, and ease of use. The main objective is to identify the impact of recommendation systems on students’ academic decisions.
Method. The research used a quantitative survey method of 20 students at universities by collecting data through online questionnaires. The results of the analysis show that the majority of respondents are experienced with the recommendation system, rely on it in selecting courses, and tend to follow the recommendations, as well as showing user satisfaction and the influence of the system on academic decisions.
Results. The results of the study show that artificial intelligence-based recommendation systems play an important role in guiding students in their academic decision-making. However, there is a need for a deeper understanding of the factors that influence user satisfaction and system effectiveness. The interim conclusion emphasizes the need for further development and adjustment of the course recommendation system in order to increase its responsiveness to student needs.
Conclusion. This conclusion is the basis for deeper reflection and the development of a course recommendation system that can more effectively meet student expectations and needs in the ever-developing era of higher education. In this way, this research has the potential to make a significant contribution to the development of more adaptive and responsive academic decision support systems.
Influence of the Bound Electron-Hole Pairs Dissociation Probability Field Dependence Form on the Photocurrent and Spatial Resolution of Organic Field Phototransistors
Authors: Trukhanov V.A.
Published: December 2023

In this work, numerical simulations are used to study ambipolar organic field-effect phototransistors, in which
a spatially localized photoelectric effect can take place. This effect consists in the fact that there is a small
spatially localized photosensitive region in the transistor channel, the position of which can be controlled
by changing the gate voltage. The purpose of this work is to analyze the relationship between the form of
the field dependence of the bound electron-hole pairs (𝑒/ℎ pairs) dissociation probability and characteristics
of the studied ambipolar phototransistors such as normalized photocurrent, spatial resolution, and response
time. It is shown that the optimal form of the field dependence of 𝑒/ℎ pairs dissociation probability is
stepwise-like form, which can provide a high spatial resolution at high values of the normalized photocurrent
without degrading the response time of the phototransistor. This shape can be achieved when the organic
semiconductor has an extremely narrow distribution of 𝑒/ℎ pairs by size, described by the delta function.
Also, on the example of several distributions of various shapes, it is shown that a decrease in the width of
the distribution leads to an increase in the spatial resolution. Approaches to the selection and modification
of organic semiconductor materials that would provide the most pronounced spatially localized photoelectric
effect in ambipolar field-effect transistors are discussed.
Blog Educativo como Estrategia Pedagógica para la Enseñanza de las Competencias Básicas en Biología Celular Dirigido a Estudiantes de Sexto Grado en la Institución Educativa Número Uno (Maicao – La Guajira)
Authors: Pérez Peluffo Duvan Roberto , Hilarión Cárdenas Lili Inelda , Arenas Tusarma Gerardo de Jesús , Villadiego Lorduy Jorge Rafael , Tuiran Polo Oscar Efraín
Published: December 2023

Se propuso una herramienta educativa digital basada en un blog en línea como estrategia para el fortalecimiento de las habilidades en biología celular de alumnos del grado sexto de una institución educativa en el norte de Colombia. El diagnosticó encontró un contexto con restricciones económicas, problemas de orden social, pocos incentivos para la formación intelectual y falencias competenciales en el área de ciencias por parte de los estudiantes; para responder a las necesidades académicas halladas se diseñó un conjunto de secuencias en Blogger® llamado “Biología Celular 6” siguiendo los principios del modelo instruccional SAM, el aprendizaje significativo y la gamificación, contando con cinco unidades temáticas en total; se implementó en un peritaje pretest-postest con una muestra de 40 estudiantes; se registró evidencia de mejora estadísticamente significativaen los resultados de las pruebas de conocimiento (aproximadamente el doble) para la totalidad de los participantes; el nivel de satisfacción reportado fue elevado, y la aplicación colaborativa del instrumento evaluativo LORI apuntó a que fue un buen recurso con características y nivel de desarrollo suficientes para ser publicado y, darle continuidad a su uso y mejora.
La gran carrera (rally) por la Carta de la Tierra y los Objetivos del Desarrollo Sostenible: Una propuesta de Educación Ambiental
Authors: Díaz Solís Amauri , Alcántara Salinas Graciela , Cortés Byron Iván , Real Luna Natalia , Pérez Sato Juan Antonio , Muñoz-Márquez Trujillo Rafael Arturo , Rivera Hernández Jaime Ernesto
Published: December 2023

La mentalidad imperante actual, dominada y gobernada por un sistema voraz que nos invita al frenesí, al consumo y a la desconexión de nuestras verdaderas necesidades y sentimientos más profundos, han provocado que nos hallemos actualmente en una situación cercana al colapso civilizatorio. En esta propuesta, se busca promover, en un contexto lúdico-recreativo, el marco ético de valores y principios de la Carta de la Tierra para hacer real un Desarrollo Sostenible que considere los puntos clave de sus componentes: ecológico-ambiental, social y económico; así como, descubren y conocen la Carta de la Tierra en sus cuatro ‘Ejes Centrales’, a la vez que conocen los Objetivos del Desarrollo Sostenible y, finalmente, relacionan e integran los objetivos de laCarta de la Tierra con los Objetivos del Desarrollo Sostenible (ODS). Para lograr esto, se diseñó una carrera para niños entre siete y 14 años, formada por cuatro bases, cada una de un color acorde con los manejados comúnmente en la literatura, que hace alusión a los Ejes Fundamentales de la Carta de la Tierra (EFCT). Con esta actividad los niños y niñas desarrollan su capacidad de identificar y visualizar las conexiones entre estos dos documentos, aspectos importantes para generar mentes más empáticas con la tierra.
Importancia de la contabilidad financiera en el control interno de empresas comerciales
Authors:   Universidad Autónoma de Asunción, Paraguay, Alegre Brítez Miguel Angel
Published: December 2023

El presente artículo científico tiene como objetivo destacar la importancia de la contabilidad financiera en el control interno de las empresas comerciales. El control interno es una función vital en la gestión de cualquier organización, y la contabilidad financiera desempeña un papel fundamental en este proceso. A través de una revisión documental exhaustiva, se analizan las diferentes formas en que la contabilidad financiera contribuye al establecimiento de un control interno eficiente en las empresas comerciales. Los resultados muestran que la contabilidad financiera proporciona información precisa y confiable sobre las transacciones financieras, lo que facilita la detección y prevención de fraudes, la toma de decisiones informadas y la evaluación de la eficacia de los controles internos existentes. En conclusión, la contabilidad financiera desempeña un papel esencial en el control interno de las empresas comerciales al proporcionar una base sólida para la gestión financiera y la supervisión de las operaciones.
Fomentando el pensamiento crítico en la era de la información: potenciándolo a través de la interacción con las nuevas tecnologías
Authors:   Universidad Americana, Paraguay, Castillo Jiménez Rubén
Published: December 2023

Este artículo examina la creciente complejidad de la comunicación en un mundo globalizado, donde la accesibilidad sin restricciones a través de internet y redes sociales ha dado lugar a un aumento en la desinformación y la posverdad. A pesar del acceso ilimitado a datos e información, la influencia de emociones y creencias personales a menudo superan a los hechos objetivos en la formación de opiniones públicas, socavando la integridad del periodismo imparcial y dificultando la toma de decisiones informadas. El artículo promueve el pensamiento crítico como una herramienta esencial para evaluar información, respaldada por estándares intelectuales de calidad, y destaca el papel de la inteligencia artificial (IA) en el análisis de datos. En un mundo saturado de información, se enfatiza la necesidad de combinar el pensamiento crítico y el uso responsable de la tecnología, como la IA, para tomar decisiones informadas y discernir la verdad en medio de la complejidad informativa actual, lo que se convierte en una habilidad crucial en diversos aspectos de la vida contemporánea.
Análisis de los aspectos generales de revistas multidisciplinarias digitales editadas por universidades en Paraguay, 2023
Authors:   Universidad Americana, Paraguay, Kwan Chung Chap Kau , Riquelme Benítez Carlos Rafael ,   Universidad Americana, Paraguay, Cáceres Méndez César ,   Universidad Americana, Paraguay, Domínguez Méndez Federico Nicolás ,   Universidad Americana, Paraguay, Marín Monzón Rebeca Esther ,   Universidad Americana, Paraguay
Published: December 2023

La investigación tiene como objetivo analizar los aspectos generales de las revistas multidisciplinarias digitales editadas por universidades en Paraguay, 2023. Se basó en un enfoque cuantitativo, no experimental de corte transaccional y descriptivo. La población consistió en un total de 18 revistas. Sin embargo, 4 de ellas fueron excluidas por no cumplir con los requerimientos mínimos necesarios. Por lo tanto, 14 revistas fueron analizadas para el efecto. Los criterios de inclusión fueron: revistas de carácter multidisciplinar, digital y perteneciente a universidades (públicas o privadas) en el país. Los criterios de exclusión fueron: revistas enfocadas a una sola ciencia con publicaciones de actividades varias (intramuros y extramuros) de la propia institución y sin posibilidad de ser indexadas. La técnica de recolección de datos consistió en un análisis de sitios web mediante un check list compuesto por 10 variables, por conveniencia en el mes de mayo de 2023. Los resultados más relevantes fueron: 78,5% son revistas editadas en universidades privadas, 64,2% mantienen una frecuencia de publicación semestral, 21,4% goza de 8 a 10 indexaciones y solo 28,5% difunden sus publicaciones a través de las redes sociales. Se concluye que existe una gran escasez de indexaciones en las revistas estudiadas, especialmente en bases de dato de gran impacto como SciELO Paraguay (a nivel nacional) y Scopus y/o Web of Science (a nivel internacional). Finalmente, el uso de las redes sociales para la difusión de los artículos científicos también es limitados, únicamente Twitter y Facebook son los más utilizados.
Nivel de conocimiento sobre criptomonedas en estudiantes universitarios de grado en Asunción durante el año 2022
Authors:   Universidad San Ignacio de Loyola, Paraguay, Gallo Cavero Sebastián Nicolás Santiago , Ferrer Dávalos Raúl Marcelo ,   Universidad San Ignacio de Loyola, Paraguay
Published: December 2023

Las criptomonedas son resultado de la era digital y del desarrollo vertiginoso de las tecnologías de la información y las comunicaciones (TIC) que representan un negocio en expansión a nivel mundial. La pérdida del valor adquisitivo del dinero tradicional ha propiciado que las criptomonedas sean consideradas como una nueva alternativa de economía e inversión. En el año 2008 Satoshi Nakamoto crea la primera moneda virtual, independiente y descentralizada, que bautizo con el nombre de “Bitcoin”, su sigla BTC respaldadas por el sistema de la tecnología de blockchain (cadena de bloques). El interés de esta investigación se centra en analizar el grado de conocimiento de los estudiantes de pregrado de la Universidad Nacional de Asunción y la Universidad Católica de Asunción Paraguay sobre criptomonedas. Paraguay viene jugando un papel en este escenario, principalmente en lo relativo a la minería de criptomonedas, que es el proceso que permite que nuevas monedas digitales entren en circulación. La metodología usada es de carácter mixta cuali-cuantitativa con enfoque analítico, previa revisión bibliográfica sobre el tema en estudio. Las principales conclusiones del trabajo muestran que las pruebas estadísticas realizadas no encuentran una relación entre la Universidad en la que se encuentran matriculados y el nivel de conocimiento sobre criptomonedas o la intención de uso.
Proyecto de Responsabilidad Social Universitaria Full Day: Curso de capacitación para propietarios de posadas turísticas de Paraguay, 2023
Authors:   Universidad Americana, Paraguay, Kwan Chung Chap Kau , Sutty Segovia Hernán Isidro ,   Universidad Americana, Paraguay, Ibarra de Ramírez María Raquel ,   Universidad Americana, Paraguay, Sosa Viera María Jorgelina ,   Universidad Americana, Paraguay, Fariña Valenzuela Larizza Tatiana ,   Universidad Americana, Paraguay, Zalazar Echauri Claudia María ,   Universidad Americana, Paraguay
Published: December 2023

El objetivo general de la investigación es determinar la percepción de los propietarios de las posadas turísticas de Paraguay sobre el curso de capacitación realizada bajo el proyecto de Responsabilidad Social Universitaria Full Day en la Universidad Americana (UA), 2023. Se llevó a cabo un enfoque cuantitativo, transversal y descriptivo. Se tomó como muestra la totalidad de la población, compuesta por dieciséis (16) propietarios de posadas turísticas, quienes participaron del curso de capacitación en Gestión de Alojamiento llevada a cabo el lunes 8 de mayo de 2023 de 08:00 a 17:00 horas, en la sede central de la UA. La técnica de recolección de datos consistió en una encuesta cuyo instrumento estuvo conformado por un cuestionario semiestructurado compuesto por tres dimensiones y 18 Ítems: características de las Charlas (6), temas de charlas (7) y charlas vs emprendimientos (5). Los principales resultados fueron: media equitativa para las 3 dimensiones Charlas vs emprendimientos (x̄=4) Temas de charlas (x̄=3,91) y Características de las charlas (x̄=3,85). Se concluye que existe una percepción favorable por parte de los participantes sobre la actividad llevada a cabo por la UA en marco de la extensión universitaria organizada por las Carreras de Gestión de Turismo y Hotelería, Contaduría pública y Administración de Empresas.
Association of sleep disorder with cardiovascular risk in the Chilean adult population
Authors: Aravena-Baquedano Karla , Garcés-Baeza Marlene , García-Sanabria Leidy , López-Espinoza Miguel Ángel
Published: December 2023

Background: sleep disorder can be considered as a relevant factor in patients with cardiovascular risk.Objective: the main objective of this study is to associate sleep disorder as a determining factor for the decrease or increase in cardiovascular risk in the adult population.Methods: transversal analytical study based on secondary records obtained from the database of the third National Health Survey from 2016-2017, with a total of 6 233 respondents aged 15 years and over, through a random and complex selection (stratified and multistage by conglomerates). Data from the Epworth Scale and cardiovascular risk classification were used. Binary logistic regression was applied with the R 3.2.2 “svy” package.Results: a statistically significant association was found between high cardiovascular risk and Epworth scores between 11-21 points (compared with 0-10 points) adjusted for sex and age (ß= 0,63; p=0,002).Conclusion: there is observational evidence that allows associating the sleep disorder with a higher risk of developing and / or dying from cardiovascular disease in the Chilean adult population
Strategic Applications for Construction Management Enhancement
Authors: Waheed Muhammad , Mutahir Abbas
Published: December 2023

This software application brings new ideas in the development of applications and helps small businesses complete the business process on time. It is designed to monitor applications, work management, problem lists, and transfer of work or information by electronic means, which is very important in Android, iOS and PC mode. Special applications provide users with useful functions such as receiving instructions from the web, sending explanations, storing work-related information, etc. This client work includes office-to-employee and employee-to-employer relationships. The ultimate goal of the app is to be a bridge between employees and employers for monitoring, updating, monitoring and optimization. Discussion and explanation of a successful application can play an important role in developing it.
Pengaruh Model Pembelajaran CORE Terhadap Kemampuan Koneksi Matematis Siswa: Studi Quasi Eksperimental
Authors: Widiastika Neni , Kartika Hendra
Published: December 2023

Tujuan: Penelitian ini bertujuan untuk mengukur tingkat pencapaian dan peningkatan kemampuan koneksi matematis siswa SMP kelas VIII dengan mengunakan model pembelajaran CORE. Metodologi: Metode yang digunakan adalah metode quasi eksperimen dengan desain Non-equivalent Control Group Design. Populasi dalam penelitian ini adalah seluruh siswa kelas VIII di salah satu SMP di Karawang, Jawa Barat. Sampel penelitian ini adalah terdiri dari dua rombel yaitu kelas VIII E dan kelas VIII F yang dipilih secara purposive sampling. Masing-masing kelas berjumlah 36 siswa. Analisis data kuantitatif menggunakan bantuan Software SPSS versi 24.0 for windows. Temuan: Hasil penelitian menunjukkan bahwa rata-rata pencapaian koneksi matematis siswa yang memperoleh model pembelajaran CORE lebih baik dari pada siswa yang memperoleh model pembelajaran konvensional (langsung). Selain itu, peningkatkan koneksi matematis siswa yang memperoleh model pembelajaran CORE lebih tinggi dari pada siswa yang memperoleh model pembelajaran konvensional (langsung). Hal ini terlihat dari hasil uji mann whitney data postest dengan nilai signifikan sebesar 0,0075 dan uji mann whitney data n-gain dengan nilai signifikan sebesar 0,0055. Signifikan: Nilai signifikan yang diperoleh kurang dari α = 0,05, maka H0 ditolak, sehingga dapat disimpulkan bahwa pencapaian dan peningkatan kemampuan koneksi matematis siswa yang menggunakan model pembelajaran CORE lebih baik dan lebih tinggi daripada siswa yang menggunakan model pembelajaran konvensional.
Optimization of K Value in Clustering Using Silhouette Score (Case Study: Mall Customers Data)
Authors: Mulyani Heti , Setiawan Ricak Agus , Fathi Halimil
Published: December 2023

Clustering is an important phase in data mining. The grouping method commonly used in data mining concepts is using K-Means. Choosing the best value of k in the k-means algorithm can be difficult. In this study the technique used to determine the value of k is the silhouette score. Then, to evaluate the k-means model uses the Davies Bouldin Index (DBI) technique. The best DBI value is close to 0. The parameters used are total consumer income and spending. Based on the results of this study it can be concluded that the silhouette score method can provide a k value with optimal results. For mall customer data of 200 data, the most optimal silhouette score is obtained at K = 5 with a DBI = 0.57.
Évaluation in vitro de l'activité antibactérienne d'un pansement chargé d'extraits de plantes
Authors: DIOP M. , Thioune O. , Neut C. , Maton M. , Riviere C. , Martel B. , Mahieux S. , Roumy V. , Blanchemain N. , Fall B. K.
Published: December 2023

Introduction : Les plaies infectées constituent un problème de santé publique du fait qu’elles peuvent prolonger la durée d’une hospitalisation. Les pansements utilisés dans leurs prises en charge contiennent souvent des antibactériens comme l’ion argent. Cette étude, dans le cadre de la valorisation des plantes Sénégalaises utilise comme actif antibactérien un extrait de noyau de mangue et d’avocat sur un support textile PET enduit d’un film plastique à base d’amidon.

Matériel et Méthodes : Les concentrations minimales inhibitrices d'extraits de plantes sur les souches testées ont été réalisées dans des boîtes de Pétri. Un mélange des extraits actifs à part égale d'extrait d'éther de pétrole de noyau d'avocat (Persea americana) et d'extrait méthanolique de noyau de mangue (Mangifera indica) a ensuite été testé. Ce mélange a été incorporé dans un pansement constitué d'un textile et d'un film plastique à base d’amidon contenant de la carboxyméthylcellulose et du polymère de bêta-cyclodextrine comme absorbant. Des tests Kirby-Bauer et kill time ont finalement été réalisés sur le pansement contenant le mélange d'extraits.

Résultats/discussion : Le mélange avocat/mangue 1:1 incorporé dans le pansement a induit une réduction logarithmique de 3,5 log de Staphylococcus aureus (ATCC 6538). Cependant, en raison d'une activité plus faible observée contre les bactéries à Gram négatif (Pseudomonas aeruginosa) et les champignons (Candida albicans), le pansement a donc pu être indiqué sur des plaies non surinfectées (absence de Pseudomonas). En ce qui concerne la capacité d'absorption (1,72 g/100 cm2), ce type de pansement est un pansement à absorption moyenne et pourrait être recommandé pour les plaies aiguës et chroniques à faible activité exsudative au stade bourgeonnant. Nos résultats démontrent l'efficacité du pansement textile avec des extraits de plantes.
Essai de formulation d’une crème cicatrisante à partir d’un mélange d’extrait de Kalanchoe crenata et Achatina fulica pour la prise en charge des brûlures de deuxième degré sur les rats de souche Wistar
Authors: Soppo Lobe Charlotte Vanessa , Nyangono Ndongo Martin , Maniepi Ngoupiho Foumane , Saurelle Jacqueline , Mapa Judith Vanessa , Emanda Ekoudi Martin , Nnanga Nga Emmanuel
Published: December 2023

Introduction : Kalanchoe crenata est une espèce utilisée traditionnellement au Cameroun pour le traitement des plaies et la bave d’escargot (Achatina fulica) est reconnue comme efficace pour le renouvellement des cellules de la peau. La présente étude avait pour objectif de formuler une crème cicatrisante du mélange de Kalanchoe crenata et Achatina fulica pour la prise en charge des brȗlures de deuxième degré sur les rats de souche Wistar.

Méthodologie : Une étude expérimentale a été menée de décembre 2021 à juin 2022. L’induction des brûlures a été faite sur des rats femelles de souches Wistar selon le modèle de Rozaini et al modifié. Le screening phytochimique a été réalisé selon les principes de Harbone, Sofowora et Evans. Les tests au DPPH, FRAP et TAC ont permis d’évaluer l’activité antioxydante. La propriété cicatrisante quant à elle, a été évaluée selon le modèle de Kamdemir et al. Concernant la fabrication de la crème, la phase hydrophile était constituée de glycérol, de mucus d’Achatina fulica, d’eau purifiée, d’eextrait aqueux de Kalanchoe crenata, et de Tween 20, et portée à 70°C au bain-marie ; parallèlement, la phase lipophile était composée de vaseline, d’huile de coco, d’huile de noisette, de laurylsulfate de sodium, et également portée à 70°C. La phase hydrophile a été additionnée à la phase lipophile sous agitation pendant 20 minutes à 60°C. Le mélange a été laissé à refroidir sous agitation plus lente jusqu'à la température ambiante. Les caractères organoleptiques, le pH, le sens de l’émulsion, l’homogénéité et la stabilité ont été évalués.

Résultats : Les composés phénoliques, terpénoïdes et les alcaloïdes ont été révélés dans l’extrait de Kalanchoe crenata et le mucus d’Achatina fulica. Les tests antioxydants ont mis en évidence une activité antiradicalaire (SC50 = 1,25 mg/ml), une activité chélatrice (20 µg EAA/g MS), et un TAC à 11µg EAA/g MS. Les plaies traitées par les produits naturels, le jus de Kalanchoe crenata (98,72% à J10), le mucus d’Achatina fulica (99,40% à J10) et leur mélange (99,76% à J10) présentent une évolution de cicatrisation très proche du produit de référence (100% à J10). La crème élaborée à 8,4 %, dénommée KALANC’AF, était une crème H/L, d’odeur d’huile d’olive, couleur verte olive, consistance molle, aspect lisse et brillant, Ph 4,36, présentant des particules visibles, stable à l’étuve et à la centrifugation. Conclusion : A l’issue de l’étude, une crème stable aux propriétés cicatrisantes à partir du jus de Kalanchoe crenata et du mucus d’Achatina fulica a été formulée.
Formulation d’un savon transparent antibactérien à base d’huile essentielle de citronnelle
Authors: Diop Moussa , Fall Mor , Faye Djiby , Cissé Katy , Fall K Bamba
Published: December 2023

Introduction : La pratique de l’hygiène des mains contribue à réduire ou à limiter le risque de transmission de germes, de micro-organismes ou de salissures et à prévenir la contamination des personnes ou objets manipulés par ces mêmes agents. Ceci est d’autant plus important en milieu hospitalier où la charge bactérienne sur les mains et les objets est très importante. L’usage de savon antibactérien est donc un élément clé dans la stratégie de réduction de la transmission de ces germes. Cette stratégie doit, en plus, prendre en compte l’effet de réduction du film lipidique cutanée provoqué par le lavage répété avec des savons. C’est dans ce contexte que nous avons formulé un savon transparent qui a la particularité d’être riche en glycérine et donc plus hydratant. Nous y avons ajouté l’huile essentielle (HE) de citronnelle connue pour son action antibactérienne à des pourcentages différents. Contrairement à beaucoup d’extraits végétaux obtenus avec des solvants organiques qui sont toxiques, l’usage d’huile essentielles obtenu par distillation ne posent pas de problèmes.

Matériel et Méthodes : La formulation du savon transparent est faite avec l’huile de coco, de la glycérine, du sucre, de l’éthanol 95° et de la soude. L’huile essentielle est celle de la marque Puressentiel®. Les savons ont été préparés entre 0,5 et 6% en huile essentielle. La CMI de l’huile essentielle à été déterminé par la méthode de dilution sur gélose. Le pH et la hauteur de mousse (Technique par variation de la mousse dans éprouvette graduée) des savons ont été aussi déterminés. Pour l’activité antibactérienne, des prélèvements ont été effectués après lavage (T0 et T5 min) sur des gants stériles délibérément contaminés par Escherichia Coli. L’activité antibactérienne correspond à une absence de pousse après 5 min. Cette technique est celle modifiée à partir de l’étude de l’activité rémanente de savons à l’huile essentielle.

Résultats/discussion : Nous avons déterminé l’activité antibactérienne de l’huile essentielle par méthode de dilution sur gélose dans une CMI de 0,6 mg/ ml. Les savons quel que soit le pourcentage d’huile essentielle a le même aspect transparent. L’ajout d’huile essentielle n’a également pas eu d’effet sur le pH qui est resté basique entre 9.1 et 10.3. La détermination de la hauteur de mousse dans de l’eau distillée montre que le savon à 1% d’huile essentielle de citronnelle a donné le meilleur résultat avec une élimination d’E.Coli des gants lavés au savon à HE. Le savon à 3% d’HE a donné le meilleur résultat comme activité antibactérienne.

Conclusion : Le savon transparent ayant le meilleur profil est celui à 3% d’huile essentielle de citronnelle. Ce savon sera utilisé par une cohorte de personnes avec suivi de l’effet sur la peau des mains afin d’étudier la toxicité cutanée et utilisé dans des services hospitaliers afin de suivre l’efficacité sur l’activité antibactérienne en condition réelle d’utilisation.