bluuebunny/crossref_metadata_2025 huggingface dataset:
Interdisciplinary Studies in Educational Research Reality, Challenges and Development Recommendations from the viewpoint of Majmaah University Teachers in the Faculty of Education
Authors: Al-Bakri Ayesha
Published: February 2023

The current study aimed to recognize the reality of interdisciplinary studies in educational research and the encountered challenges, and to provide developmental recommendations. The author implemented a descriptive methodology and constructed a questionnaire. From the faculty of education at Majmaah University (55) teaching member participated in the study during the second semester 1442/ 1443 hijri. Analyses of data found that the level of interdisciplinary studies in educational research was low, in addition the challenges level encountering educational interdisciplinary research was high, differences between respondents answers on the reality and challenges was insignificant, and recommendations offered to develop interdisciplinary studies in educational research volume was high. In light of the results, the author recommends to benefit from non-specialized experiences in conducting educational research, to seek partnerships between different disciplines in solving educational and communal problems and developmental issues, to activate the role of research teams to enhance researchers, educationalists and academics participation in interdisciplinary studies, and to increase university fund budgets to conduct educational interdisciplinary studies. In addition, the author recommends conducting a study involving interdisciplinary research skills acquaintance, and a study on the relation of interdisciplinary studies to achieve the kingdom vision of 2030.
Supererogatory Prayers In The Mosques Without A Congregation
Authors: Altuwala Sultan
Published: February 2023

The research sheds light on the Jurisprudence rulings related to the priority of supererogatory prayers in the mosque over the house. Objectives: The research clarifies the concept of supererogatory prayers in the mosque, and to limit the supererogatory prayers that are desirable in the mosque over the house and a congregation. Research also highlights a jurisprudential study compared to the evidences and weighted opinions upon these issues. Research method: the descriptive analytical method. The major results: The research included some results, including: Sharia’s concern for prayer and persistence to perform it, the legality of performing supererogatory prayers in mosques at all. Therefore, the jurists, may Allah have mercy upon them, agreed on the priority of performing the prayers in the mosque in places such as: around the Kaaba, behind the shrine, the honorable Raudah, Quba Mosque, the one coming from travelling, prayer of greeting of the mosque, and before the Friday prayer. The important results: Researchers should pay attention of topics that some people may overlook, even if those topics are scattered in books of jurisprudence. The collecting, editing and facilitating those topics for the students is a great importance, as the researchers should show the legal ruling that it may be clear and identified.
Parallel Structure in Diwan: Omar Yazmlh Al Qasseed By The Poet Shtyui Al-Ghaithi
Authors: Al reshidi Fahad
Published: February 2023

This research deals with the parallel structure of the poet Shtiwe Al - Ghaithi in Diwan: Omar Yazmlh al-Qasseed, and seeks to highlight the synthetic patterns on which this parallel comes, and aims to reach the most important manifestations of the transformation of the parallel structure, the goal for which the poet breaks that structure. The research found that the poet's main reasons for breaking the structure of parallelism among his poems were synthetic alignment, preservation of external music, and semantic purpose. All of which did not depart from his rhythmic musical appearance.
Procedural protection of the trademark in GULF COOPERATION COUNCIL TRADEMARK LAW - an analytical study
Authors: Sufran Ahmed
Published: February 2023

Trademarks have become an important component of industrial property. It concerns both the merchant and the consumer; it distinguishes the goods of the merchant from others, and enables the consumer to distinguish the goods. Due to the effort and money the merchant exerts on the goods bearing his mark to increase their quality and to advertise them, they must be protected, and this is what the laws and regulations in various countries have sought, as they have worked to protect the trademark procedurally, criminally and civilly. Despite the importance of the procedures and their role in protecting the trademark, they did not receive sufficient research, analysis and evaluation. Therefore, the research aims to shed light on the administrative procedures related to the trademark from the time of its registration until its cancellation, by describing these procedures, then analyzing them and then evaluating the extent of its impact on achieving the desired protection. The researcher found that procedures are considered the first line in protecting the trademark, and that the system and its regulations achieve a great deal of it, and recommends setting a specific standard for the meaning of degrading goods or services, and clarifying the procedures and provisions related to mortgaging and seizing the trademark, and re-drafting the law and its executive regulations in a way that achieves this, and makes each of them complement the other without repetition.
Lotus birth (Fiqh Study)
Authors: Aba-Hsain Nehal
Published: February 2023

This research examined a birth method that has recently spread in a number of countries, namely: (the Lotus Birth). It is the practice of birthing the baby and placenta, and leaving the two attached until the cord falls off on its own. This method of birth has a number of benefits in the interest of the newborn. However, these benefits are not essential, but rather complementary. Moreover, Lotus Birth method was proved to have some disadvantages, which represent a risk to newborn’s health and may lead to the death of the newborn. After investigation and research in Islamic Fiqh ruling on lotus birth; the researcher concluded that the ruling should be based on the consequences of this birth method; if it represents a risk, then it should be forbidden. Otherwise, it is permissible - unless it is accompanied by a pagan belief.
Laboratorios virtuales reales en la enseñanza de la Biología: su complemento
Authors: Chong González Juan Julián , Noa Silverio Luisa
Published: February 2023

Las Tecnologías de la Información y la Comunicación han cambiado los espacios y la forma en que se produce el conocimiento y su difusión. En el campo educativo las TIC han impactado de una forma profunda. Esto implica que los docentes deben explorar nuevos espacios y métodos, así como nuevas formas de diseñar las actividades para el aprendizaje. En el presente trabajo se presenta la necesidad de innovar el proceso de enseñanza aprendizaje de la Biología y del uso de los laboratorios mediante la ¨complementariedad¨ de lo real con lo virtual, es decir un cambio en el paradigma educativo. Para ello, se analizan algunas propuestas de competencias necesarias de los docentes en la incorporación de las TIC y se presenta una selección de las mismas. Además, se incluyen en ellas la competencia que debe poseer el profesor para diseñar acciones efectivas de aprendizaje con la inclusión de los entornos virtuales.
Un sistema de tutorías para la modalidad Blended Learning
Authors: Latorre Barragán Carlos Fernando
Published: February 2023

Este trabajo recoge el resultado de las experiencias en el ámbito de la educación a distancia y de la educación virtual, particularmente en la Vicerrectoría de Universidad Abierta y a Distancia (VUAD) de la Universidad Santo Tomás en el marco de la implementación y fortalecimiento de una modalidad combinada o mixta (blended-learning), a partir del uso pedagógico de las Tecnologías de la Información y la Comunicación (TIC), de manera que se posibilite articular las características y ventajas de la educación a distancia tradicional con las posibilidades que ofrece el e-learning, particularmente desde la mediación pedagógica y comunicacional, así como de la acción tutorial para mejorar y enriquece los escenarios de enseñanza y aprendizaje a partir de nuevas prácticas pedagógicas, recursos metodológicos innovadores y estrategias didácticas más fexibles y dinámicas en el marco de una docencia más interactiva y dialógica. De acuerdo con lo anterior el artículo aborda tres ejes temáticos: las características de la educación a distancia, virtual y combinada; la docencia dialógica como eje de la formación en un modelo Blended Learning y un sistema tutorial fundamentado en la interacción y la interactividad como bases para la mediación pedagógica y comunicacional.
Modelagem Exteroceptiva Via Álgebra de Clifford Para Trajetória em Ambiente Confinado do Robô Movemaster RV-M2
Authors: Cerbaro Jonathan , Oliveira André Schneider de , Fabro João Alberto
Published: February 2023

Diversos tópicos envolvendo a álgebra que modela e soluciona equações de cinemática na área de manipuladores seriais possuem problemáticas ainda em aberto, apesar de já bem compreendidas. Cada vez mais a indústria exige a inovação nas técnicas de controle e sensoriamento de robôs capazes de interagir com o ambiente de maneira segura. Realiza-se neste trabalho a abordagem da álgebra de Clifford aplicada à cinemática e à descrição de um ambiente de confinamento para o manipulador Movemaster RV-M2, com elementos que permitem a generalização a outros manipuladores. É feita a relação destas técnicas com pontos, linhas e planos que permitem projetar trajetórias livres de colisão. Os experimentos são realizados com o robô após este passar pelo processo de retrofit, onde sensores de cor, profundidade e odometria foram instalados além de um novo controlador de código aberto compatível com ROS. Contribui-se com um algoritmo de maximização de objetivos secundários e com uma metodologia inédita de modelagem de obstáculos. Conclui-se com a validade dos métodos propostos através de exemplos realizados com o robô real e simulado, tendo a possibilidade de aplicar as técnicas discutidas em diversas contribuições futuras.
Odometria Multifrequência para Veículos Aéreos Autônomos
Authors: Ferreira Patrick de C. T. R. , Colombini Esther L.
Published: February 2023

A navegação de veículos aéreos autônomos exige estimativas confiáveis de variáveis de estado como posição e orientação dos mesmos. Existem diversos métodos de controle para este fim, mas a inabilidade em estimar com precisão o próprio posicionamento inviabiliza a navegação autônoma, principalmente em ambientes fechados. Este trabalho propôs um framework para odometria visual-inercial baseado em redes neurais capaz de trabalhar com sensores em múltiplas frequências de entrada, aliando a precisão dos métodos de localização visual com as altas taxas de atualizações de métodos inerciais. O framework é modular e apresenta desvio ATE em torno de 0.30m, RPE de 2.5% e 2.0 graus/s, além de taxa de atualização de cerca de 200Hz.
O Torneio de Robótica da UFES e sua Importância como Evento de Extensão Universitária
Authors: Bassani Lorena Bacheti , Nascimento Gabriel Pietroluongo , Oliveira Higor David , Ferreira André
Published: February 2023

Este trabalho apresenta um relato sobre o Torneio de Robótica da UFES – TRUFES em suas sete primeiras edições realizadas pela Equipe de Robótica da UFES – ERUS. Neste trabalho, será relatado um breve histórico sobre a ERUS, o histórico do torneio e suas sete edições realizadas desde 2013, e as expectativas sobre o futuro do evento de extensão TRUFES. Além disso, será explorada a importância da extensão universitária e da robótica como ferramenta de ensino em todas as fases de formação de profissionais em engenharia e ciências.
Bioethanol Production
Authors: Ayyanna Chakali , Sujatha Kuppusamy , Kumar Mohanthy Sujit , Rajangam Jayaraman , Naga Sudha B. , Raghavendra H.G.
Published: February 2023

In recent decades, usage of biofuels as fossil fuel substitutes has increased. One method for lowering both crude oil use and environmental pollution is the production of ethanol (bioethanol) from biomass. This report offers an examination of the existing state of affairs and future prospects for biomass-to-ethanol. We examine different conversion routes from a technological, economic, and environmental standpoint. The main focus of this study is on the yield of ethanol from molasses in relation to the dilution ratio and the quantity of yeast used for fermentation while maintaining a constant fermentation temperature and time. In this investigation, the feedstock is sugarcane molasses. A thick by-product of turning sugar cane into sugar is sugarcane molasses. Consequently, sugarcane molasses and other agricultural byproducts are desirable feedstock for the manufacture of bioethanol. Agricultural wastes are cheap, abundant, and renewable. The least expensive strain for the conversion of biomass substrate is Saccharomyces cerevisiae. As a conclusion, it was found that the ethanol yield increased with an increase in yeast quantity, reaching an optimal yeast quantity before ethanol yield started to drop. The ideal ratio of molasses to water was found to be 1:2. The amount of fermentable sugars contained in the biomass has a significant impact on the output of ethanol.
Network Formation and Analysis of Dengue Complex Network
Authors: Abid Mahmood Malik Hafiz
Published: February 2023

Several efforts have been made and are constantly being made to keep the Aedes aegypti virus under control. Numerous scholars are involved in the study of medicine, while others are working in computer science and mathematics to model the spread of this disease. This study will help to comprehend how this epidemic sickness behaves. A complex network has been established from the complex dengue phenomenon. We have evaluated dengue network topology by pondering scale-free network properties. The network’s resilience in tracking the dengue epidemic is measured by systematically removing nodes and links. The primary hubs of this network are emphasized, and the vulnerability of the network structure has been examined through an in-depth investigation of the dengue virus’s spreading behavior. Understanding the intricate web of dengue outbreaks relies heavily on geographic representation. The applied method on the dengue epidemic network and the results will be added as scientific additions to the literature on complex networks. Different network analysis metrics have been applied (closeness centrality, betweenness centrality, eigenvector centrality, network density), and the network’s stability has been evaluated. This network is extremely vulnerable to targeted attacks; results showed that after removing 8% of focal hubs, 34% of the network is destroyed.
Standard Analytical Techniques and de novo Proposals for Successfull Soil Biodegradation Process Proposals
Authors: Cabral-Miramontes Juan , Dorantes-Alvarado Pamela , Aréchiga-Carvajal Elva
Published: February 2023

The contamination of water, air, and soil represent a serious problem worldwide. Therefore, it is a priority to reduce the levels of cytotoxic in the environment caused by human activities that generate chronic degenerative diseases. For example, soil contamination caused by oil and derivatives removed with biotechnological products based on biological systems of microorganisms with physiological and molecular mechanisms that allow them to carry out effective bioremediation processes, reducing the concentration of polluting hydrocarbons. The main obstacle is validating the biodegradation efficiency of chemical compounds by bacterial consortia; therefore, it is vital to adapt or develop analytical strategies to verify heavy-end reduction for each type of biological system used in remediation. This chapter describes the techniques and their adaptations for oil degradation and their derivatives promoted by microorganisms. As the limits of the methods vary within the parameters determined by international norms and laws, we compare conventional and new-generation proposals to adjust to probe biotechnological products based on consortia of biodiverse microorganisms that significantly degrade petroleum fractions.
Thermal Characteristics and Tribological Performances of Solid Lubricants: A Mini Review
Authors: Mittal Divyansh , Singh Daljeet , Kumar Sharma Sandan
Published: February 2023

Solid lubricants separate two moving surfaces and reduce wear. Materials’ ability to act as solid lubricants depends on their characteristics relative to contact surfaces. Chemically stable fluorides (BaF2, CaF2), boron nitride (h-BN), transition metallic sulphides (MoS2, WS2), soft metals (Au, Ag), binary and multi-component oxides, such as silver-containing sulphates, chromates, and oxides, and MXenes are effective solid lubricants. Solid lubrication depends on the material’s structure. Structure, mechanical properties, chemical reactivity, and kind of substance characterise these materials (refractories, ceramics, glass, etc.). High temperatures (>300°C) are obtained at asperities due to frictional heat produced when two surfaces rub. High temperatures can breakdown lubricants, but the resulting compounds must be lubricants; otherwise, corrosive vapours or abrasive solids can occur. High thermal conductivity helps lubricants remove heat generated by rubbing. Lubricants must not be melted, as the solid will lose strength and distort or be removed like liquid. Tensile strength, compressibility, and hardness are significant mechanical qualities for solid lubricants in extreme conditions. This chapter discusses solid lubricants and their structure. Also discussed are solid lubricants’ mechanical and thermal properties. The lubricating mechanism and conclusion are also conferred.
Food Preservation Packaging
Authors: Ibrahim Garba Abubakar
Published: February 2023

The most important role of food packaging is to provide a total barrier to physical, biological and/or chemical factors that can tender the quality integrity of the packaged food, an ideal food packaging should be rigid and non-reactive to the food enclosed. That is, a packaging material should be safe by and/or for the food. Food and packaging may interact and pose effects, which may affect the quality, integrity and shelf life of the food. This chapter discusses the processes of food packaging interaction such as permeation, migration, sorption and their adverse effects on the food packaging system. Novel packaging systems such as Active packaging (packaging that preserve, communicate and protect quality integrity of the food), Intelligent packaging (packages with improved communication models that help consumers ascertain the quality and the state of the food) and Bio-active packaging (are active packaging with improve compound in them that support stability of the food) were discussed as advanced packaging systems that help in mitigating the food-package interaction as well as give consumer conveniences while extending shelf stability. Scientific models used in studying the extent of food packaging interaction are also discussed which includes the stochastic, mathematical and simulation models.
A Subdural Supratentorial Hemorrhage and Contusion after a Traumatic Brain Injury Mimicking a Dural Thickening: A Clinical Case
Authors: Alahmari Abdulwahab
Published: February 2023

This is a paper about a case of a subdural hemorrhage and contusion mimicking a dural thickening. The bone window was applied which helped in showing the bleeding very clear. This case will discuss this case and the usefulness of the bone window in similar scenarios.
Dimensi yang Terkandung dalam Pendidikan Islam Multikultural
Authors: Teri Andrian  , Aripin
Published: February 2023

Multiculturalism is very important because it is driven by the desire to increase human harmony and spread peace throughout society. In Indonesian multicultural education, the teachings of peace and conflict resolution are based on Islam with Rasulullah SAW as Rahmatan lil'Alamin. This attitude of mutual tolerance will produce dynamic cultural diversity and richness of national identity which must be preserved. In fact, diversity serves as a bonding tool. a body of explanations that recognizes and values ​​the importance of cultural and ethnic diversity to the lives of individuals, groups and nations, as well as to social experiences, personal identities and educational opportunities. Equal/fair education or only pedagogy, knowledge construction, reduction of prejudice, content integration, school culture empowerment components, social structure, and empowerment components are all components of multicultural education. Religious teachings about the growth of multicultural ideas are also taught in multicultural Islamic education.
Peningkatan Hasil Belajar Peserta Didik Dengan Model Pembelajaran Advance Organizer Dalam Pokok Bahasan Materi Anak SMA Boleh Pacaran Pada Mata Pelajaran Pendidikan Agama Kristen
Authors: Sertiana Siahaan
Published: February 2023

This research is Classroom Action Research (CAR) conducted at SMA Negeri 5 Pematangsiantar which is located at Jalan. Medan Km. 6,8, Ex. Tanjung Tongah, Kec. Siantar Martoba, Pematangsiantar. The subjects of this study were students of class X PMIA 1 with a total of 15 students. The objectives of this study were 1) to find out whether there was a significant influence with the Advance Organizer learning model 2) to improve the cognitive abilities of students on the subject of high school children can date. The data collection techniques used are tests and observations. There are four stages of the procedure in this study, namely planning, implementing, observing, and reflecting. This research was conducted in two cycles where each cycle was carried out in two meetings. The results showed that learning completeness in cycle I was 46.67% increasing to 80% with an average score of 72 increasing to 90.67.
Necrotising periodontal diseases
Authors: Donohoe Eamonn , Butt Jamshaid , Harrison Peter
Published: February 2023

Necrotising periodontal diseases (NPDs) are a group of infectious diseases that include necrotising gingivitis (NG), necrotising periodontitis (NP) and necrotising stomatitis (NS). These three clinical presentations may represent different stages of a continuum of the same disease process, with shared aetiological factors, and broadly similar initial clinical features and treatments. The term ‘ulcerative’ is no longer used in classification as ulceration is considered secondary to the gingival necrosis present.

NP may result in destruction of periodontal ligament and supporting bone, while in NS, destruction progresses to deeper tissues such as the lip, cheeks and tongue. These presentations are more frequently seen in patients with HIV/AIDS or other systemic/immune compromise and, in developing countries, among those with severe malnourishment, respectively. In an Irish context, NG will represent the most common clinical form seen in general dental practice and may present as an acute condition requiring urgent management. Consequently, the current review will focus on NG. Table 1 provides an overview of the key aspects of NG.
Ameliorative Effect of Vitamin E on Paraquat Induced Nephrotoxicity in Rat
Authors: Okolonkwo Benjamin Nnamdi , Brisibe Ngozi , George-Opuda Ibitoroko Maureen
Published: February 2023

The kidney is a very vital organ required for excretion of metabolic waste products in the body and when the kidney is damaged, this function is compromised. Paraquat is a toxicant that is known to have toxic injuries in different organs. Therefore, the aim of this study was to uncover the treatment effect of vitamin E in paraquat inflicted kidney injury. The experimental animals (male rats) were 200 and they were classified into 4 groups designated as A, B, C and D. The A served as the control group, B, C and D were test groups classified based on dose of paraquat administered. A was not treated with paraquat, B, C and D were treated with 0.02g, 0.04g and 0.06g of paraquat respectively every two weeks for three months. Each group mentioned had subgroups designated “0” and “VE”; “0” subgroups were subgroups not treated with vitamin E while “VE” were subgroups treated with 500mg of vitamin E. Treatment of vitamin E occurred weekly for one month. Both vitamin E and paraquat treatments occurred orally. After treatment period rats were sacrificed and blood sample collected via cardiac puncture for urea and creatinine assay. The results showed that there was no significant difference in urea levels among paraquat alone treated groups but there was a significant increase in creatinine levels among paraquat alone treated groups. There was a significant decrease in creatinine level after vitamin E treatment. This study has shown that vitamin E is a therapeutic hope for paraquat inflicted nephrotoxicity in rats.
Vitamin E and C Long-Term Treatment Effect on paraquat Poisoned Liver in Rat
Authors: Okolonkwo Benjamin Nnamdi , Brisibe Ngozi , George-Opuda Ibitoroko Maureen
Published: February 2023

Paraquat toxicant causes serious herbicide intoxication generally and typically because of intentional or unintentional ingestion. Vitamin C and E are awesome antioxidants that respond quickly to oxidative stress and modify lipid peroxidation. This study was aimed at assessing the impact of Vitamin E and C combined treatment on chronic toxicity of paraquat on liver organs in Wistar rats. Exactly 200 male rats were used for the study. The rodents were isolated into four groups of 50 rats in each group (A, B, C, D) and was further subgrouped into two (0 and VEC), having 25rats per subgroup. Each of the "0" subgroups (A0, B0, C0 and D0) aside from A0 were treated with paraquat in 0.02g, 0.04g and 0.06g respectively for 3 months every 2 weeks. All "VEC" subgroups (AVEC, BVEC, CVEC and DVEC) aside from AVEC were treated with paraquat also, after which they were treated with vitamin E (500mg) and C (2000mg/L) week after week for three months. AVEC was treated with vitamin E and C alone. Blood samples were obtained and tested for liver function (total, conjugated, unconjugated bilirubin, total protein, albumin and globulin). There was a significant difference (p-value<0.05) in the level of the liver parameters among the "Ao", "Bo", "Co" and "Do". The outcome additionally showed that there were significant difference (p-value<0.05) in the levels of the liver parameters within the groups (Bo vs BVEC, Co vs CVEC, and Do vs DVEC). However, was no significant difference in the levels of globulin among the subgroups. This study has affirmed that vitamin E and C combined therapy has a helpful impact in male Wistar rats on week after week treatment for 3 months.
Efectos del aprendizaje diferencial y tradicional sobre el bote en jugadores principiantes de baloncesto.
Authors: Hernández- Peña Keb , Gea García Gemma María , Menayo-Antúnez Ruperto
Published: February 2023

El objetivo de este estudio fue comparar la eficacia del método de aprendizaje diferencial caótico frente al tradicional durante la enseñanza de la técnica del bote de balón. Participaron 12 jugadores de baloncesto nóveles, divididos en dos grupos de 6 participantes -grupo entrenamiento tradicional (ETR) y grupo entrenamiento diferencial (EDC)-. Cada uno de los métodos de aprendizaje se desarrolló durante 8 semanas, a razón de 2 sesiones por semana de 30 min de duración. Los participantes realizaron un test de control de balón antes del comienzo de la intervención y tras la finalización de la misma, después de la octava semana. Los resultados mostraron una reducción del 12,27% del tiempo empleado en la prueba de control de balón para el ETR al comparar los tiempos registrados antes (8,44±0,35sg) y después (7,41±0,32sg) del comienzo del entrenamiento. Lo mismo ocurrió con el EDC, dónde se redujo el tiempo un 10,16% (7,96±0,70sg) respecto a los tiempos iniciales (8,35±0,43sg). Sin embargo, al comparar los resultados obtenidos entre los dos programas de entrenamiento, no hubo diferencias significativas en los tiempos registrados (p=0,278). Los resultados mostraron como la intervención sobre el elemento técnico de bote en baloncesto mediante entrenamiento diferencial resultó ser igual de beneficiosa que la realizada mediante un método tradicional. Dados los pocos estudios que han aplicado el método diferencial caótico, parece necesario plantear mayores periodos de intervención para conocer si éste puede obtener mejores rendimientos respecto al aprendizaje tradicional.
Cambios en los estilos de vida durante el periodo de confinamiento por el COVID-19
Authors: Colom Rosselló Miquel
Published: February 2023

Objetivos. El objetivo del presente estudio fue evaluar los cambios en los estilos de vida durante la fase de confinamiento del COVID-19 en España (del 15 de marzo al 21 de junio).

Material y métodos. La muestra abordada correspondió al universo poblacional de población española mayor de 18 años en confinamiento independientemente de la zona geográfica. La muestra final de 252 participantes, se seleccionó a través de un muestreo intencional y los datos se recogieron mediante un cuestionario ad hoc en modalidad virtual. Se realizaron análisis univariantes, bivariantes y de estimación de riesgo.

Resultados. Los resultados mostraron un aumento en la realización de actividad física durante el confinamiento, sobre todo en las mujeres (p=0,001), no obstante, la media de horas sentado al día ha aumentó considerablemente (5,65 ± 2,95 horas hasta 7,49 ± 4,20 horas). El porcentaje de personas que no consumieron alcohol aumentó hasta el 36,7% (n=92). No se encontraron diferencias significativas en las horas de sueño. Se observó un alto porcentaje de personas que presentaron atracones durante el confinamiento (44,6%; n=113). Además, se observaron mejores hábitos saludables a mayor nivel de instrucción y en zonas rurales (OR=2,804 y OR=3,48 respectivamente).

Conclusiones. Se observaron cambios positivos en los hábitos de actividad física y alimentación durante el confinamiento, por otra parte, aumentó el tiempo de estar sentados y se observó una elevada presencia de atracones durante este periodo. Estos hallazgos pueden ayudar a establecer nuevas estrategias de abordaje en situaciones similares. Sin embargo, futuros estudios serían necesarios.
Análisis de la producción científica de ejercicio físico acuático dirigido a mayores
Authors: Tuero del Prado Concepción E. , Gutiérrez-Rebollar Luis Ángel
Published: February 2023

El envejecimiento de la población genera la necesidad de preservar su bienestar y calidad de vida. El ejercicio físico en el medio acuático se plantea como una opción viable bajo la premisa de la salud de los mayores. Por tanto, se habilita como un campo de interés científico. El objetivo de este estudio es analizar la producción científica sobre el ejercicio físico acuático dirigido a mayores, entre 2005 y 2019. La metodología se plantea a partir de los criterios establecidos para las revisiones sistemáticas. Se llevó a cabo una búsqueda en publicaciones periódicas en la Web of Science y en Scopus. Se obtuvieron 91 artículos que se ajustaban a los criterios de inclusión y exclusión establecidos y se analizaron algunos aspectos bibliométricos (aspectos cronológicos, autoría, país, revista, idioma y tema de investigación). Los resultados arrojan datos relevantes en torno al incremento de las publicaciones en el último lustro analizado, la relevancia de los autores brasileños o el predominio del inglés como idioma vehicular, entre otros. Además, se ha identificado que los temas que encabezan las investigaciones respecto a intervenciones del ejercicio física acuático en mayores son la condición física y la salud, el riesgo de caídas y la marcha. Los resultados refrendan la importancia del ejercicio físico en el medio acuático desde la perspectiva del bienestar de los mayores.
Validation of quality and satisfaction scale of nautic charter focused on tourism business development
Authors: Morales-Baños V. , Borrego-Balsalobre F.J. , Angosto-Sánchez S.
Published: February 2023

La calidad de los servicios turísticos y deportivos como el chárter náutico requiere un tratamiento y análisis cuidadoso debido al impacto económico que representa en el sector en general, máxime en las Islas Baleares, donde es un reflejo del turismo y la recreación a nivel mundial. A través de un cuestionario, que tiene en cuenta cuatro factores de medida, se encuestó a 185 usuarios de compañías chárter durante la temporada de verano de diferentes nacionalidades, edades y géneros. El objetivo era verificar su validez de medida para los usuarios de estos servicios. Las cifras obtenidas por el ajuste y la tasa de error fueron exitosas, igual que cada valor obtenido en la estimación de la confiabilidad de la escala y su validez convergente y discriminante. Este cuestionario proporcionará una visión general de la opinión de los usuarios en relación con el deporte.
Application of secure semi-supervised fuzzy clustering in object detection from remote sensing images
Authors: Pham Quang Nam , Nguyen Long Giang , Le Hoang Son , Tran Manh Tuan
Published: February 2023

In recent years, landslides are taking place very seriously, and tend to increase in both scope and scale, threatening people's lives and properties. Therefore, timely detection of landslide areas is extremely important to minimize damage. There are many ways to detect landslide areas, in which the use of satellite images is also an option worthy of attention. When performing satellite image data collection, there are many outliers, such as weather, clouds, etc. that can reduce image quality. With low quality images, when executing the clustering algorithm, the best clustering performance will not be obtained. In addition, the fuzzy parameter is also an important parameter affecting the results of the clustering process. In this paper will introduce an algorithm, which can improve the results of data partitioning with reliability and multiple fuzzifier. This algorithm is named TSSFC. The introduced method includes three steps namely as “labeled data with FCM”, “Data transformation”, and “Semi supervised fuzzy clustering with multiple point fuzzifiers”. The introduced TSSFC method will be used for landslide detection. The obtained results are quite satisfactory when compared with another clustering algorithm, CS3FCM (Confidence-weighted Safe Semi-Supervised Clustering).
Urban Railway Development in Hanoi and the Possible Impacts on Mode Shifting: Experiences from Young Transport Users
Authors: Truong Thi My Thanh , An Minh Ngoc
Published: February 2023

This study aims to explore the travel behaviour of young travel group to understand different factors that could influence their mode choices, and their willingness to shift to the first urban railway line in Hanoi. This will help notify a range of measures that could be considered to decrease motorcycle usage and facilitate mode shift to public transport system. With the data collected from 396 students in five universities in Hanoi, Vietnam, a conditional logit regression model was developed to explore individual and alternative specific variables influencing the mode choice for studying trips. Key findings show that current mode usage, especially the dominant of motorcycle riding, having a strong effect on the tentative choice of Cat Linh – Ha Dong railway as a means of travelling to universities. Research results are beneficial for transport planners and transport authorities to develop appropriate transport planning strategies.
Phương pháp tiếp cận trí tuệ nhân tạo để dự báo độ kim lún và điểm hóa mềm của nhựa đường biến tính graphen oxit
Authors: Huong Giang Hoang Thi , Nguyễn Hoàng Long , Lê Thanh Hải  , Lê Nho Thiện  , Vũ Thế Thuần
Published: February 2023

Độ kim lún và điểm hóa mềm là hai chỉ tiêu quan trọng nhất để phân loại mác nhựa đường theo độ kim lún truyền thống. Việc xác định 2 chỉ tiêu này của nhựa đường biến tính graphen oxit (GO) bằng phương pháp thực nghiệm gặp những khó khăn nhất định do giá thành GO cao, thời gian thí nghiệm kéo dài. Mục đích của nghiên cứu này là sử dụng hệ thống suy luận thần kinh mờ thích ứng (ANFIS) kết hợp thuật toán giải thuật di truyền (GA) để dự đoán độ kim lún và điểm hóa mềm của nhựa đường biến tính GO. Hai bộ dữ liệu bao gồm bộ dữ liệu độ kim lún (122 mẫu), bộ dữ liệu điểm hóa mềm (130 mẫu) được thu thập từ 12 nghiên cứu khác nhau với 9 tham số đầu vào, được dùng để xây dựng và kiểm chứng công cụ mô phỏng số. Ngoài ra, nghiên cứu sử dụng kỹ thuật xác thực chéo 10 lần cùng với các tiêu chí thống kê là hệ số tương quan (R) và căn của sai số toàn phương trung bình (RMSE) để đánh giá hiệu suất của các mô hình. Kết quả nghiên cứu cho thấy, đối với bộ dữ liệu độ kim lún, mô hình ANFIS-GA có RMSE = 6.045 (0.1 mm), R = 0.949, mô hình ANFIS có RMSE = 8.492 (0.1 mm), R = 0.893. Đối với bộ dữ liệu hóa mềm, mô hình ANFIS-GA có RMSE = 1.848 (oC), R = 0.991, mô hình ANFIS có RMSE = 13.863 (oC), R = 0.818. Điều này cho thấy, cả hai mô hình ANFIS-GA và ANFIS đều đạt hiệu suất dự đoán tốt và độ chính xác cao. Với RMSE nhỏ hơn và R cao hơn ở cả 2 bộ dữ liệu, mô hình ANFIS-GA được đánh giá là tốt hơn ANFIS. Mô hình này hoàn toàn có thể được áp dụng để giúp các kỹ sư vật liệu tiết kiệm thời gian và chi phí thí nghiệm.
Model design of automatic defective product sorting system
Authors: Chovanec Lubos , Duong Quang Khanh , Vuong Thi Huong , Ngo Thi Lanh , Nguyen Thi Nam , Dung Tran Duy  , Nguyen Thai Son , Pham Hai Long
Published: February 2023

In industrial field, various automation techniques have been studied and applied to increase productivity, better accuracy and eliminate the human errors. This paper developed a model of the automatic defect sorting system to distinguish between qualified and defective products. By using image processing to detect the matching of captured images with the storage based sample, the system ensures products with different colours are correctly delivered to the designated box. In this study the detection of three types of products were tested by image processing provided by LabVIEW software. They are the cube face with full of red panels, the cube face with 3 of 4 red panels and the others. The test results of the system achieved approximately an accuracy of 96% under stable lighting conditions.
Artificial intelligence approach to predict the dynamic modulus of asphalt concrete mixtures
Authors: Le Thanh-Hai , Nguyen Hoang-Long , Pham Cao-Thang
Published: February 2023

This paper develops an Artificial Neural Network (ANN) model based on 96 experimental data to forecast the dynamic modulus of asphalt concrete mixtures. The accuracy of the models was assessed using numerous performance indexes such as the Root Mean Square Error (RMSE), Mean Absolute Error (MAE), Mean Absolute Percentage Error (MAPE), and coefficient of determination (R2). In addition, this study applied the repeated K-Fold cross-validation technique with 10 folds on the training data set to make the simulation results more reliable and find a model with more general predictive power. According to the research findings, the ANN model accurately predicts the dynamic modulus |E*| of asphalt concrete mixtures. Furthermore, the ANN model could successfully predict the dynamic modulus |E*| of asphalt concrete mixtures with a remarkable R2 = 0.989.
Prediction and sensitivity analysis of self compacting concrete slump flow by random forest algorithm
Authors: Kumar Raghvendra , Mai Hai-Van Thi
Published: February 2023

Self-compacting concrete (SCC) is a construction material with many advantages, including high performance and the capacity to self-compact without mechanical vibration. As a result, SCC is widely used in construction, especially at locations where concrete structures are difficult to construct. Filling ability is one of the three basic requirements that must be met when designing the SCC mix. The slump flow (SF) is used to determine the SCC mixture's filling capacity. As a result, it is critical to estimate this number fast and precisely. The purpose of this study is to propose the use of a random forest (RF) model to predict the SF of SCC and to assess the effect of input parameters on output parameters. The study constructed the RF model using a dataset of 507 experimental results collected, which is the biggest data collection compared to previous studies on this subject. Additionally, a 10-fold cross-validation approach is used to improve the model's prediction performance. As a result, the performance assessment criteria for the testing dataset have values of RMSE = 59.5664 mm, MAE = 32.4483 mm, and R = 0.8614, respectively. This result shows that the RF model is an effective tool in predicting the SF of SCC.
Predicting tensile strength of cemented paste backfill with aid of second order polynomial regression
Authors: Ngo Quoc Trinh , Nguyen Linh Quy , Quan Van Tran
Published: February 2023

The materials left behind after the process of separating an ore's valuable fraction from the unprofitable fraction are known as tailings in the mining industry. Mixing tailing, cement and water can create a new material called Cemented paste backfill (CPB). Research and solve the problem of predicting the tensile strength of cement paste backfill based on a polynomial model combined with the Monte Carlo Simulation method. Three models were built to evaluate performance. The optimal performance model is then used to predict the tensile strength of cement paste backfill. The results indicate that using the polynomial regression model has a satisfactory result for predicting the tensile strength of cement paste backfill. The best performance of second order polynomial regression model is evaluated by three metrics such as R2=0.958 RMSE=33.211 kPa MAE=29.097 kPa for testing part in predicting the tensile strength of cemented paste backfill. Finally, the influence of Cement/Tailings ratio and Solid content on the tensile strength on tensile strength and importance is also evaluated with aid of the best performance of second order polynomial regression model.
Forecast of surface chloride concentration of concrete utilizing ensemble decision tree boosted
Authors: Tran Anh-Tuan , Le Thanh-Hai , Nguyen Huu May
Published: February 2023

This study proposes the application of Ensemble Decision Tree Boosted (EDT Boosted) model for forecasting the surface chloride concentration of marine concrete  A database of 386 experimental results was collected from 17 different sources covering twelve variables was used to build and verify the predictive power of the EDT model. The input factors considered the changes in eleven variables, including the contents of cement, fly ash, blast furnace slag, silica fume, superplasticizer, water, fine aggregate, coarse aggregate, annual mean temperature, chloride concentration in seawater, and exposure time. The results indicate that EDT Boosted is a good predictor of  as verified via good performance evaluation criteria, i.e., R2, RMSE, MAE, MAPE values were 0.84, 0.16, 0.17, and 17%, respectively. Partial dependence plot (PDP) was then developed to correlate the eleven input variables with the . PDP implied that the strongest factor affecting Cs was the amount of fine aggregate content, chloride concentration, exposure time, amount of cement, and water, which is useful for material engineers in the design of the grade.
Giải pháp kết cấu cầu dầm T kép bê tông dự ứng lực thi công đổ tại chỗ
Authors: Lại Vân Anh  , Phùng Bá Thắng , Nguyễn Trung Kiên  , Trần Đức Giang
Published: February 2023

Các kết cấu cầu dầm bê tông đổ tại chỗ có ưu điểm tính toàn khối cao, có thể áp dụng công nghệ đổ tại chỗ trên đà giáo cố định hoặc đà giáo di động (MSS). Nghiên cứu áp dụng các kết cấu cầu tải trọng bản thân nhẹ là cần thiết phù hợp loại hình công nghệ này. Hiện nay các cầu thi công đổ tại chỗ trên đà giáo cố định và đà giáo di động thường có các mặt cắt dạng hình hộp hoặc bản rỗng. Việc bố trí các ván khuôn trong khiến việc thi công kéo dài và phức tạp hơn. Bài báo này trình bày một giải pháp kết cấu cầu dầm mặt cắt chữ T kép đặc, không lõi, thi công đổ tại chỗ, hình dạng lai giữa T và hộp, dễ thi công. Nghiên cứu này tập trung phân tích và so sánh giữa dầm T kép với các loại dầm tương đương đang được sử dụng tại Việt Nam. Kết luận cho thấy kết cấu này có trọng lượng bản thân nhỏ, ổn định có thể áp dụng tại các vị trí cầu cạn, cầu vượt, các nút giao với đà giáo cố định hoặc cũng có thể áp dụng cho các cầu qua sông theo công nghệ đà giáo di động.
Nghiên cứu ứng dụng mô hình thực nghiệm hồi quy đa biến trong chế tạo vật liệu sơn nhiệt dẻo có độ bám dính cao
Authors: Phạm Hồng Chuyên
Published: February 2023

Trong bài báo này, tác giả trình bày kết quả khảo sát lựa chọn loại nhựa nhiệt dẻo đang có trên thị trường Việt Nam để chế tạo sơn nhiệt dẻo có độ bám dính cao. Từ kết quả đó, các nghiên cứu tiếp theo sẽ xây dựng mô hình thực nghiệm hồi quy đa biến theo phương pháp của Mc Lean – Anderson để lựa chọn được hàm lượng của các thành phần hóa học có trong sơn nhiệt dẻo. Kết quả nghiên cứu đã lựa chọn được công thức chế tạo sơn nhiệt dẻo bao gồm: Bột CaCO3 38%, nhựa nhiệt dẻo 32%, bi thủy tinh 20%, pigment 10%. Sử dụng phương pháp xác định độ bám dính kiểu pull – off theo ISO 4624: 2002, kết quả cho thấy sơn nhiệt dẻo chế tạo từ mô hình có độ bám dính cao, vượt yêu cầu của tiêu chuẩn TCVN 8791:2018 tương đương tiêu chuẩn ASSHTO M 249: 2012.
Xác định vận tốc khai thác đảm bảo an toàn khi xe ô tô chạy trên đường cong tròn trong điều kiện Việt Nam
Authors: Nguyễn Chính
Published: February 2023

Mục tiêu quan trọng khi đầu tư xây dựng tuyến đường là xe chạy an toàn với vận tốc cao để rút ngắn thời gian vận chuyển, nâng cao hiệu quả đầu tư. Tuy nhiên khi xe ô tô chạy trong đường cong nằm dạng tròn sẽ chịu ảnh hưởng của lực ly tâm khiến xe có nguy cơ bị lật, trượt trên mặt đường gây mất an toàn giao thông. Do vậy cần phải nghiên cứu, xác định vận tốc khai thác khi xe ô tô chạy trong đường cong nằm dạng tròn đảm bảo an toàn giao thông. Trên cơ sở phân tích mối quan hệ giữa vận tốc và bán kính đường cong nằm dạng tròn đến điều kiện ổn định của xe ô tô, bài báo đã nghiên cứu và kiến nghị vận tốc khai thác đảm bảo an toàn khi xe ô tô chạy trong đường cong nằm dạng tròn với bán kính đường cong nằm tối thiểu giới hạn và bán kính đường cong nằm tối thiểu thông thường. Kết quả nghiên cứu của bài báo là cơ sở để cơ quan quản lý xác định vận tốc khai thác hợp lý của tuyến đường.
Nâng cao hiệu quả kinh tế - kỹ thuật của công trình bến tường cừ một neo bằng cách lựa chọn cao trình gắn neo và chiều dày lớp đá thay thế đất yếu trước tường hợp lý
Authors: Nguyễn Văn Vi , Nguyễn Văn Hiền
Published: February 2023

Bài báo trình bày sự cần thiết nghiên cứu lựa chọn cao trình gắn neo và chiều dày của lớp đá xít thải và đá hộc thay thế đất yếu trước tường hợp lý để tạo ra công trình bến tường cừ một neo có hiệu quả kinh tế - kỹ thuật cao. Các tính toán công trình bến tường cừ một neo dựa trên phương pháp "dầm tương đương" của Blium và được lập thành chương trình tính TC-TD-DTD. Các nghiên cứu đã đưa đến kết quả cơ bản là:
- Xét cả các yếu tố về chịu lực, kinh tế và điều kiện thi công thì chiều sâu gắn neo hợp lý chỉ nên lựa chọn trong khoảng hn = (0.20 – 0.32)Ht, với Ht là chiều cao công trình.
- Chỉ nên lấp đá xít ở sau tường cừ, còn việc thay thế đất yếu trước tường bằng đá xít mang lại ít hiệu quả với chiều dày tối thiểu hd > 3.1 m, do đó nên thay thế đất yếu trước tường bằng đá hộc với chiều dày hd = (2.0 – 3.0) m.
Các kết quả nghiên cứu có thể được ứng dụng trong thực tế khi thiết kế xây dựng mới, cũng như cải tạo nâng cấp các công trình bến cảng dạng tường cừ một neo.