bluuebunny/crossref_metadata_2025 huggingface dataset:
Caleidoscopio del racismo escolar Saberes, pedagogías, conmemoraciones e iconografías
Authors: Caicedo-Ortiz Jose Antonio , Castillo-Guzmán Elizabeth
Published: July 2022

La escuela tiene un origen excluyente. Tal y como la hemos visto transitar en más de dos siglos, estuvo encargada de implantar el proyecto moderno civilizatorio fundando con ello las bases morales e ideológicas de nuestras sociedades nacionales blanco-mestizas. De este modo, como lo hemos dicho en diferentes momentos, la historia del racismo y la historia de la escuela en América Latina, son las dos caras de un mismo acontecimiento de profundo colonialismo interno y modernidad periférica. Con este artículo de refelexión, proponemos un caleidoscopio descriptivo del racismo escolar, con el fin de contribuir a develar su funcionamiento interno. Los estudiossobre este fenómeno en Colombia, se han concentrado en la última década en el análisis de los textos escolares y en estudios de caso sobre las relaciones de convivencia, representaciones y dinámicas discursivas. Nuestro objetivo es sumar a la comprensión del racismo en la escuela como un hecho constitutivo de la institución misma y no como un aspecto más de la cultura escolar. Hablamos entonces de formas del racismo para resaltar su existencia múltiple y diversaen su interior. Entendemos que esta moderna institución actúa por medio de dispositivos queracializan a las personas, y con ellos las culturas, las geografías, los saberes y las corporalidades que“representan”. En tal sentido, las formas del racismo en la escuela se refieren también a los modos de la micropolítica con relación a los asuntos de la raza, la cultura y la denominada alteridad étnica.
Matemáticas y prácticas racistas en la escuela: experiencias con docentes de Bogotá
Authors: Valencia-Salas Ángela Patricia
Published: July 2022

En este artículo pretende brindar algunas reflexiones producto de la investigación “Prácticas racistas en la escuela: un análisis de las prácticas de maestros y maestras de matemáticas” durante la Maestría en Educación de la Universidad Pedagógica Nacional. Así pues, esta investigación tuvo como objetivo analizar desde una perspectiva decolonial cómo se configuran y reproducen prácticas racistas y otras formas de discriminación asociadas a esta en los procesos pedagógicos de maestras y maestros de matemáticas en escuelas distritales de Bogotá, específicamente en las prácticas de docentes de matemáticas con relación a niños y niñas afrocolombianos(as). La investigación contempló entrevistas a profundidad a maestros y maestras de diferentes instituciones educativas distritales, trabajo de campo y observación en una ied en particular. Se exploró desde las narrativas de maestros, niños y niñas las formas en que se manifiestan el racismo y la discriminación racial en la escuela; sin embargo, los resultados presentados en este artículo se enfocan en las narrativas de maestros y maestras frente a sus experiencias pedagógicas con niños y niñas afrocolombianos(as). Estas reflexiones, además de convertirse en una crítica a los universalismos y a los determinismos, identifica de las condiciones de posibilidad que hicieron que hoy en Colombia subsistan este tipo de prácticas y no se escapen del escenario escolar, proponiendo algunos caminos para superar paulatinamente este tipo de situaciones que afectan la dignidad de niños y niñas en la escuela.
Narrativas otras para pensar la interculturalidad: apuntes de clase
Authors: García-Ramírez Carolina , Benavides-Cortés Angie Linda
Published: July 2022

El presente artículo gira en torno a las reflexiones derivadas de una práctica investigativa y pedagógica sobre la relación entre narrativas otras, interculturalidad y formación de maestros y maestras para las infancias. Las reflexiones expuestas en el texto responden al desarrollo de dos seminarios presentados en el marco de la Maestría en Educación de la Universidad Pedagógica Nacional - “Literaturas otras: ¿qué nos cuenta la literatura infantil afrocolombiana e indígena sobre la interculturalidad?” y “Estéticas de la interculturalidad a través del cine”, desde los cuales se enuncian algunos apuntes de clase que pretenden contribuir en construcciones referidas a otras formas posibles de mirar, leer, comprender tanto la diferencia cultural, como la interculturalidad para todos y todas. Además de lograr referenciar otras formas de tejer narrativas que transitan como parte de la reivindicación del ser indígena y el ser afrodescendiente.
La autoevaluación de centros educativos de infantil y primaria para la mejora de la atención a la diversidad
Authors: Chocarro de Luis Edurne , Sáenz de Jubera-Ocón Magdalena
Published: July 2022

La atención a la diversidad es uno de los retos del sistema educativo, siendo el profesorado el responsable último en el aula. Por ello es importante analizar sus percepciones para así identificar las fortalezas y debilidades al respecto desde el contexto del centro educativo, siendo esta concepción el objetivo principal de esta investigación. Así pues, se llevó a cabo una evaluación en 20 centros de Educación Infantil y Primaria de la Comunidad Autónoma de La Rioja (España), utilizando la Guía de autoevaluación de centros para la atención a la diversidad desde la inclusión (Acadi). Los resultados mostraron que los participantes compartían unos valores inclusivos y un liderazgo pedagógico que facilita el progreso hacia una educación inclusiva.
Confiabilidade da avaliação de retração de cintura escapular em uma unidade de cuidados intermediários neonatal
Authors: Santos Lara Sampaio Franca , Albergaria Tatiane Falcão dos Santos , Flor Carmen Júlia Del Rey Villa , Pinto Junior Elzo Pereira , Pedreira Rhaine Borges Santos
Published: July 2022

OBJETIVO: Avaliar a confiabilidade inter e intra-examinador, na utilização de instrumentos de avaliação da retração de cintura escapular em crianças internadas em uma unidade de cuidados intermediários neonatal. MATERIAL E MÉTODOS: Estudo quantitativo, transversal e observacional, realizado com recém-nascidos e lactentes que necessitaram de internamento numa unidade de cuidados intermediários neonatal. A coleta de dados ocorreu de outubro de 2019 a fevereiro de 2020. Para avaliação da retração da cintura escapular foi utilizado um protocolo de inspeção biomecânica elaborado pelas pesquisadoras, que possibilitou a realização de medidas (em centímetros) das bordas mediais superiores e inferiores, direita e esquerda, até a coluna vertebral, com a cabeça em rotação para a direita e para a esquerda, e o sinal do cachecol. As avaliações foram realizadas sempre pelos mesmos avaliadores. Para estimar a confiabilidade inter e intra-examinador do protocolo de inspeção biomecânica e sinal do cachecol, foi utilizado o Índice de Kappa e para as medidas do posicionamento das escápulas, o Coeficiente de Correlação Intraclasse. RESULTADOS: O protocolo de inspeção biomecânica dos sinais sugestivos de retração de cintura escapular demostrou concordância leve a moderada inter-examinadores e substancial a quase perfeita intra-examinador. A concordância inter-examinadores obtida no sinal do cachecol foi leve a moderada, e quase perfeita intra-examinador. O posicionamento das escapulas, apresentou concordância inter-examinadores considerada como boa e concordância excelente intra-examinador. CONCLUSÃO: A avaliação de sinais sugestivos de retração de cintura escapular, em recém-nascidos e lactentes, apresenta baixos índices confiabilidade inter-examinadores e altíssima confiabilidade intra-examinador.
Immunization status of children at kindergarten entry in Alberta, Canada
Authors: Dhungana Manisha , Hoben Matthias , O’Brien Celine , MacDonald Shannon E.
Published: July 2022

Objectives

Little is known about immunization coverage among kindergarten-aged children in jurisdictions that do not require children’s immunization records to be provided at school entry. Thus, we assessed immunization coverage and associated characteristics of a 2008 birth cohort of Alberta children at kindergarten entry as compared with at the end of grade one.

Methods

This retrospective cohort study used population-based administrative health data for childhood vaccines in Alberta, Canada. We categorized and compared immunization status of children as follows: (a) complete at kindergarten entry; (b) incomplete at kindergarten entry but complete at the end of grade one; and (c) still incomplete at the end of grade one. To assess factors associated with immunization status, we used multinomial logistic regression.

Results

Immunization coverage for the complete vaccine series for children (N = 41,515) at kindergarten entry was suboptimal (44.5%, 95% CI 44.0–45.0) and substantially lower than for children at the end of grade one (74.8%, 95% CI 74.3–75.2). Young maternal age, not living with a partner, and having > 1 child in a household were associated with incomplete immunization status at kindergarten entry. Midwife-assisted hospital and home delivery was strongly associated with incomplete immunization status at the end of grade one.

Conclusion

Immunization coverage at kindergarten entry was strikingly low. Risk factors for incomplete immunization status were identified that require particular attention when addressing immunization coverage. The school-based catch-up immunization program in grade one seems to have substantially improved coverage among children, suggesting a potential benefit of shifting the catch-up program from grade one to kindergarten entry.
La tecnología como complemento al proceso de enseñanza-aprendizaje de la flauta dulce en la etapa de Educación Primaria
Authors: Bravo-Fuentes Paloma
Published: July 2022

Many countries incorporate the study of the recorder into the teaching of music in primary education. The students have a group class per week of no more than one hour in duration, being a complex that performs a real individualization of the learning process. After the collective class, the students have to practice at home alone, with the responsibility for their progress in the study falling on themselves.This work proposes the inclusion of a digital tool as a complement to the deficiencies that the teaching-learning process of the instrument presents, as well as a proposal for a study protocol to be followed by the student in their autonomous progress.TThe objective of the computer application is to offer the possibility of listening to the musical piece, showing the score, recording the performances and, finally, providing references and data on the mistakes made, both to the students and to the teaching figure. This information, until now unknown, causes the traditional teaching model to be completely transformed. After carrying out the inclusion and evaluation of both proposals in an educational context, positive conclusions have been obtained that show the substantial improvement of the teaching-learning process of this musical instrument.
«Hay más imágenes para ti...». El impacto mediático de «La Isla de las Tentaciones» en la juventud española a través de Instagram
Authors: Parejo José Luis , Bernal-Luque Antonio
Published: July 2022

«Temptation Island» has been a revolution among young people between the ages of 6 and 24, who have made up a high percentage of the audience. Therefore, the aim of this work is to investigate the repercussion and media impact that the show's participants have had on Instagram, both from the progression of their profiles and by categorising the contents that are most present in the show. Likewise, it seeks to identify the motivations of this group towards the dating talk show. A mixed methodological approach was used, applying a quantitative analysis to establish the progression of 11 Instagram profiles of the participants. The results of the study reveal that the 18-24 year old group is the most represented group of Instagram’s followers. It was observed that romantic love is related to values such as respect and the ideal of the «better half». Hence, these viewers show feelings of rejection and shame for actions contrary to this concept. However, another sector of the public shows its approval and even normalises infidelity. This kind of programmes show a media culture based on the hypersexualization of characters, so it is necessary an education that critically analyzes the representations that these programmes make about reality.
Mujeres y tecnología educativa en las universidades españolas. Los recovecos de la invisibilidad
Authors: Gewerc-Barujel Adriana , Ramos-Trasar Inés
Published: July 2022

The aim of this study is to find out the situation of teaching staff in educational technology at Spanish universities and the visibility of their research, taking two basic dimensions into account: productivity and recognition. It is a documentary study with quantitative analysis, focused on four dimensions: the presence of women in Spanish public universities in the academic field of Educational Technology; the professional categories they work in (through institutional websites); the H-Index extracted from the academic social network Researchgate (analysed with IBM SPSS STADISTICS Version 27) and the participation of women in two of the Spanish international conferences leading Educational Technology: the Initiative of the Association for the Development of Educational Technology and New Technologies applied to Education (EDUTEC) and the Educational Technology Conference for Education (JUTE) (through the programmes published). The results show that women teachers in the field of Educational Technology in Spain represent more than 41% of the total. This representation does not correspond to the visible presence in the different academic fields that indicate productivity and recognition. The gender perspective of the academic field of Educational Technology in Spain is not very optimistic, as it reproduces the patterns that are seen in most areas of knowledge.
Sınıf Öğretmenlerinin Matematiğe İlişkin İnançları: Ölçek Uyarlama Çalışması
Authors: GÜLLÜ Hasan , AKÇAY Ahmet Oğuz
Published: July 2022

Bu araştırma, 2017 yılında Purnomo tarafından geliştirilen ve orijinal adı “Teachers’ Mathematics-Related Beliefs” olan ölçeğin Türk kültürüne uyarlanarak sınıf öğretmenlerinin matematiğe ilişkin inançlarını tespit etmeye yarayan bir ölçme aracı elde etmeyi amaçlamaktadır. Orijinal ölçek, matematiğin doğası, matematik öğretimi ve matematikte öğrenmeyi değerlendirme olmak üzere toplam 3 boyuttan meydana gelmektedir. Yazar, ölçeği geliştirirken her boyut için ayrı ayrı AFA, DFA ve güvenirlik testi uygulamıştır. Ölçek geliştirme sürecinde araştırmanın tüm katılımcılarını sınıf öğretmenleri oluşturmuştur. İlgili ölçeğin Türkçeye çevirisi yapılırken geri orijinaline çeviri tekniği kullanılmıştır. Ölçek uyarlama çalışmasının örneklemini 216 sınıf öğretmeni oluşturmaktadır. Ölçeğin yapı geçerliği ve faktör yapısını incelemek için her boyuta AFA uygulanmıştır. Faktör yapısının verilerle ne düzeyde uyum sağladığını tespit etmek için her boyuta DFA uygulanmıştır. Ölçeğin güvenirliğini belirlemek için tüm ölçeğe ve her alt boyuta güvenirlik testi uygulanmıştır. Sonuç olarak Türk kültürüne uyarlanan Sınıf Öğretmenlerinin Matematiğe İlişkin İnançları ölçeğinin geçerli ve güvenilir bir ölçme aracı olduğu sonucu elde edilmiştir.
Personality Psychopathology and the Role of Self-Compassion
Authors: Sorem E.B. , Priebe K.M. , Anderson J.L.
Published: July 2022

Previous research has examined the relationship between particular personality disorders (PDs) and self-compassion. However, the field has developed new methods for assessing and diagnosing personality psychopathology, and previous work has not extended to the Alternative Model for Personality Disorders (AMPD) of the DSM-5. The current study aimed to examine associations between self-compassion and personality psychopathology using an evidence-based assessment and diagnosis approach. The study used Neff’s Self-Compassion Scale (SCS) in addition to Criterion A (elements of personality functioning) and Criterion B (pathological traits) of the AMPD in order to observe associations between PDs and self-compassion. The results indicated that there were strong associations between identity and self-compassion, as well as that self-compassion and its components were moderately negatively associated with the majority of the AMPD personality traits. The findings can help to establish working treatment methods for individuals with PDs as well as provide support for the evidence-based hybrid dimensional-categorical model of personality assessment.
Cognitive Behavioral Therapy for Insomnia (CBT-I): A Primer
Authors: Walker J. , Muench A. , Perlis M.L. , Vargas I.
Published: July 2022

Cognitive Behavioral Therapy for Insomnia (CBT-I) is a multi-component treatment for insomnia that targets difficulties with initiating and/or maintaining sleep and is delivered over the course of six to eight sessions. The primary focus of CBT-I is to address the perpetuating factors (according to the three-factor model of insomnia) that contribute to the development of chronic insomnia. Chronic insomnia is the most prevalent sleep disorder, occurring in approximately 6–10% of the population, and is a risk factor for multiple medical and psychiatric disorders. Despite its prevalence and morbidity, the widespread dissemination of CBT-I is not commensurate with insomnia’s overall public health impact. This is particularly surprising given its large evidence base and recent recommendation as the first line intervention for insomnia. The primary goal of this article is to provide a primer or brief introduction to CBT-I that is intended to be accessible to all clinicians and researchers, including non-sleep experts. Core components of CBT-I (i.e., Sleep Restriction Therapy, Stimulus Control Therapy, Sleep Hygiene, and Cognitive Therapy), relapse prevention strategies, multicultural considerations, adjuvants to traditional interventions, treatment adherence issues, efficacy, and further training options are described. A session-by-session outline is also provided.
Gold Standard Versus Treatment as Usual: Assessment Practices in the Juvenile Justice System
Authors: Kovalenko J.D. , Li N. , Grigorenko E.L.
Published: July 2022

Mental health concerns are highly prevalent in the juvenile justice system (JJS). Assessment practices vary significantly across probation departments, often relying on past medical history or unstructured clinical interviews. Numerous structured and semi-structured assessment tools exist, some of which have previously been used within JJS samples. The current research compared mental health diagnosis prevalence and distribution as assigned by the current practice in a probation department versus utilizing the Kiddie Schedule for Affective Disorders and Schizophrenia (K-SADS) in a sample of youth involved with the JJS. Results suggested the K-SADS identified a higher variety of mental health concerns with higher precision (e.g., all diagnoses were specified rather than unspecified). However, the standard assessment practice identified a higher prevalence of ADHD diagnoses, as well as “Other Conditions That May Be a Focus of Clinical Attention.” Limitations and future directions are discussed.
Psychological features of alcohol consumption among student youth in the European North of Russia
Authors: Mulik Alexander B. , Shatyr Yulia A. , Ulesikova Irina V. , Soloviev Andrey G. , Nazarov Nikita O. , Cherniy Evgeniy V.
Published: July 2022

AIM: to identify the psychological characteristics of alcohol consumption among students of the European North of Russia.
METHODS: The study involved 137 students of state universities in the city of Arkhangelsk (37 men and 100 women aged 17-25), pre-selected for a number of reasons: Russians, born in the city of Arkhangelsk or the Arkhangelsk region, brought up in a complete, socially prosperous family, without financial and domestic problems without chronic somatic and neurological diseases. Identification and analysis of the experience of alcohol consumption at the prenosological level was carried out by retrospective self-assessment of the subjects. The psychological status of the respondents was determined by assessing the Freiburg multifactor personality questionnaire FPI, character accentuations, suggestibility, frustration, irritability and resentment, adventurousness, behavioral, social, professional, economic, political activity and social destructiveness. For statistical data processing, the WilcoxonMannWhitney method and Fishers F-test were used.
RESULTS: High levels of adventurousness (Me=10.5 units), extraversion (Me=8 units), behavioral activity (Me=7 units), and low shyness (Me=2.5 units) were found in the group of males who used alcoholic drinks. High levels of emotivity (Me=18 units), adventurousness (Me=9.5 units), and social activity (Me=7 units) were found in the group of women who consumed alcoholic drinks.
CONCLUSIONS: For the first time, an analysis was made of the manifestation of indicators of the psychological status of students (representatives of the Russian population of the European North of Russia) consumers at the prenosological level and non-consumers of alcohol. The psychological markers of alcohol consumption in boys and girls permanently residing in the conditions of the Northern territories of the Russian Federation were determined.
Análisis y valoración de la presencia del cuidado en el currículo oficial en Educación Secundaria Obligatoria.
Authors: Vargas Sánchez Miriam , Sánchez Fernández Sebastián
Published: July 2022

Esta investigación tiene como objetivo fundamental analizar y valorar la presencia del cuidado en el currículo oficial de Educación Secundaria Obligatoria, siendo el análisis documental la técnica predominante de este estudio, cuyo análisis se ha realizado desde una mirada interdisciplinar que engloba la perspectiva de género y de la investigación para la paz, aproximaciones que apoyan la importancia del cultivo del cuidado en la escuela. Este trabajo muestra que a pesar del imprescindible papel que juegan los cuidados y la afectividad en las relaciones interpersonales, el tratamiento del cuidado que se ofrece en el currículo, es escaso y poco profundo, a pesar del valor que le otorgan figuras de relevancia en el ámbito socioeducativo.
El ego-feminismo como discurso
Authors: Menéndez Menéndez María Isabel
Published: July 2022

YouTube es hoy el espacio mediático de consumo prioritario entre jóvenes, generando una cultura de la participación que ha modificado los códigos de representación y las relaciones sociales. Además, estaría favoreciendo la superación de referencias patriarcales, heteronormativas y coloniales entre otras. Al calor de la visibilización del feminismo que se produjo con el fenómeno #MeToo, empiezan a sobresalir mujeres que usan YouTube para exponer la teoría feminista, reclamar los derechos de las mujeres, denunciar la violencia sexista o explicar la discriminación de género. El presente texto estudia a algunas de estas YouTubers con el objetivo de aproximarse a sus propuestas bajo el paradigma de la epistemología feminista, mediante un close reading con el que estudiar qué mensaje transmiten y cuáles son las variables más significativas con las que elaboran un discurso que he definido como ego-feminismo.
Reseña: Ledo Andión, Margarita (2020). El cuerpo y la cámara Madrid: Ediciones Cátedra
Authors: Sánchez Vázquez Clara
Published: July 2022

Reseña: Ledo Andión, Margarita (2020). El cuerpo y la cámara Madrid: Ediciones Cátedra
Entrevista a Nuria Varela
Authors: Sánchez-Ramos María
Published: July 2022

Entrevista  de María Sánchez-Ramos a Nuria Varela.
Entrevista a Margarita Ledo Andión
Authors: García Puente María , Hogan Erin K.
Published: July 2022

Fragmento de la entrevista de María García Puente [Profesora en  la California State University San Bernardino] y Erin K. Hogan  [Profesora en la University of Maryland Baltimore County] a Margarita Ledo Andión para el para el Gynocine Project: Women filmmakers, feminism and film studies dirigido por Bárbara Zecchi. Este proyecto, que se puede consultar en https://www.gynocine.com., cuenta con una base de datos online que incluye entrevistas y otros recursos sobre la producción de las mujeres cineastas a lo largo del mundo.
Ingeniería y ciencias de la vida: Relación simbiótica para la supervivencia humana
Authors: Serna M. Edgar , Serna A. Alexei
Published: July 2022

Aunque los desarrollos que surgen del trabajo conjunto entre ingenieros y científicos de la vida han aumentado y mejorado en las últimas décadas, todavía hay muchas cosas que hacer en esta relación. Una de ellas es la mejora urgente del sistema de salud, porque si bien la tecnología es importante para mejorar el diagnóstico y el tratamiento, también es necesario superar los complejos problemas de cobertura, calidad, equidad y atención oportuna que sufren los pacientes en muchas partes del planeta. Los gobiernos deben tener el presupuesto adecuado para satisfacer las necesidades en salud de sus ciudadanos y fortalecer el sistema para ampliar la cobertura y mejorar su calidad. Estas son tareas pendientes que deben abordarse desde la experiencia de la ingeniería para gestionar y organizar sistemas, en un trabajo armonioso con científicos de la salud e involucrando a pacientes, médicos, gobiernos, fabricantes, otras disciplinas y la sociedad en general.
Prevalencia del síndrome visual por computadora en los estudiantes de medicina de la ciudad de Tunja durante la pandemia.
Authors: Gerena Pallares Luis Carlos , Vargas Rodríguez Ledmar Jovanny , Niño Avendaño Carlos Alberto , Uyaban Geraldine Camila , Ballesteros Virgen Yuri
Published: July 2022

Introducción: La American Optometric Association define el Síndrome Visual por Computadoras (SVC) como el conjunto de problemas oculares, visuales y musculoesqueléticos (especialmente del cuello y hombro), relacionados con el uso cercano y frecuente que se experimentan durante el trabajo con computadores o relacionados con estos, incluidos los dispositivos móviles inteligentes.
Objetivo: Determinar la prevalencia del SVC en los estudiantes de medicina de la ciudad de Tunja durante las clases virtuales secundarias a la pandemia por COVID-19.
Metodos: Estudio observacional descriptivo, donde se incluyeron a estudiantes del programa de medicina que estaban matriculados para el segundo semestre del año 2020. Se aplicó una encuesta virtual.
Resultados: En el estudio se incluyeron 296 participantes, de los cuales 197 eran hombres. El 62.5% pertenecían a universidad pública. El 65% presentaban problema de alteración en la refracción. La prevalencia de síndrome visual por computadora fue del 84.4% de los participantes.
Conclusiones: El síndrome visual por computadora es una patología poco estudiada, sin embargo muy frecuente, esto dado por los altos niveles de exposición a aparatos electrónicos a las que no vemos enfrentados en la actualidad. El presente estudio encontró un alto nivel de síndrome visual por computadora, dato que pudo estar relacionado con los cambios que se tuvieron en la forma de estudiar y laborar, donde las herramientas tecnológicas se convirtieron en un pilar fundamental, es por esto que es importante crear conciencia sobre el uso adecuado de los mismos y tener presente distintos métodos de prevención para disminuir al máximo esta patología.
STRUCTURAL, FERROELECTRIC AND ELECTRICAL-FIELD-INDUCED PIEZOELECTRIC PROPERTIES OF PbTiO3-MODIFIED COMPLEX 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 MATERIALS
Authors: Nguyen Hoang Thoan , Nguyen Xuan Duong , Nguyen Huu Lam , Luong Huu Bac , Pham Van Vinh , Nguyen Ngoc Trung , Nguyen Van Duc , Nguyen Duc Dung
Published: July 2022

Complex ferroelectric PbTiO3-modified 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 materials were synthesized by a conventional solid-state reaction method. The addition of PbTiO3 into host 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 materials are modified the ferroelectric properties of host materials where the maximum polarization slightly increased from 23.09 C\cm2 to 23.28 C\cm2 and the remnant polarization is found to increase from 10.07 C\cm2 to 11.31 C\cm2. The large piezoelectric dynamic coefficient value of 662 pm\V is obtained for 7 mol. % PbTiO3 modified 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 compounds as solid solution. Our work is expected to contribute to the role of A-site modification in lead-free ferroelectric BaTiO3-based materials for advanced function materials for electronic device applications.
DETERMINING THE THERMODYNAMIC DISSOCIATION CONSTANTS OF 5-BROMO-6,7-DIHYDROXY-N-METHYL-3-SULFOQUINOLINE IN AQUEOUS SOLUTION AT 25 OC BY POTENTIOMETRIC METHOD
Authors: Tran The Nga , Nguyen Thi Mai Anh
Published: July 2022

In this report, the thermodynamic dissociation constants of 5-bromo-6,7- dihydroxy-N-methyl-3-sulfoquinoline (signed H2BDMS) acid were firstly determined in the aqueous solution using potentiometric titration at (25.0 ± 0.1) oC in the ionic medium of 0.10 M KCl solution. This new acid is a compound containing the quinoline ring that may be applied in many branches of chemistry, biology, and medicine. The pKa values of H2BDMS acid which were determined by the potentiometric method are pKa1 = 2.79 ± 0.02 and pKa2 = 7.80 ± 0.06. To increase the precision and accuracy of the results, the pKa values were calculated at various concentration levels. The structure of the new acid and data of potentiometric titration were analyzed in detail before calculating and assigning the pKa values to suitable functional groups. These results will be applied to our further studies of this compound.
PARTICULATE MATTER LEVELS AND ELEMENTAL COMPOSITION IN THE SPRING AND TRANSITION PERIOD IN HANOI, VIETNAM
Authors: Hoang Van Manh , Ly Bich Thuy , Nguyen Dac Loc , Nguyen Minh Thang , Van Dieu Anh , Ton Thu Giang , Nguyen Thi Thu Hien , Vo Thi Le Ha
Published: July 2022

Particulate matter (PM) is a major environmental concern in Vietnam as well as in the world. Samples of PM2.5, PM10, and total suspended particle (TSP) were collected on the rooftop of a five-floor building inside Hanoi University of Science and Technology, Hanoi, from January to May 2015. The levels PM2,5, PM10, and the metal elements of TSP were determined. PM2,5 and PM10 had average concentrations of 73 ± 37 and 138 ± 67 μg\m3, respectively. The concentration of PM2,5 and PM10 in all samples were higher than the recommended level in the World Health Organization (WHO) guideline (2005) for 24h and annual concentrations of 25 and 50 μg\m3, respectively. Nineteen elements detected in TSP samples included the higher concentration group in order: Ca > Fe > Na > Al > Mg > K > Zn and in the lower concentration group: Pb > Mn > Ti > Sr > V > Cr > Cd. The potential sources revealed from element components were discussed.
SCREENING YEAST FROM NATURAL HONEY, AND BEESWAX IN SON LA PROVINCE FOR LOW-ALCOHOL MEAD PRODUCTION
Authors: Nguyen Hoang Nam , Phan Due Thanh , Tran Thi Thuy
Published: July 2022

Son La is a northern mountainous province of Vietnam, where the climate and soil are suitable for various flowering plants and for many honey bee species to grow and produce high-quality honey. Yeasts in honey are expected to have valuable characteristics that can be applied in many fields. In this paper, seventy-two yeast strains isolated from natural honey and beeswax in Son La were screened for the ability of alcoholic fermentation to produce mead. Screening yeast strains for lowalcohol mead production were carried out based on the fermentation ability and the sensory of the final mead product. Yeast train NT95 was selected and characterized as Zygosaccharomyces sp. NT95. A suitable condition for the growth of Zygosaccharomyces sp. NT95 was Hansen broth containing a sugar concentration of 60 - 90 g\L at pH 4.0 - 4.5, and a temperature of 30 °C. A suitable condition for the alcoholic fermentation of Zygosaccharomyces sp. NT95 in the honey medium was at 30 °C with the inoculum of 5 x 107 cells\mL for 18 days. Under this condition, the mead produced by Zygosaccharomyces sp. NT95 contained approximately 4.5% alcohol (v\v) and the sensory score reached 14.51 ± 0.15 points. Further studies need to be done to improve the fermentation process and the completion of the product.
CHANGES IN LIVING CONDITIONS, LIFESTYLE, AND BEHAVIORS OF HIGH SCHOOL STUDENTS DURING THE COVID-19 PANDEMIC IN VIETNAM
Authors: Le Thi Thuy Dung , Dao Thi Thuy , Nguyen Hoai Thuong , Le Thi Tuyet
Published: July 2022

This study was performed to clarify the impacts of the COVID-19 pandemic on high school children's living conditions, lifestyle, living and studying habits. Cross-sectional research was conducted on 2369 high school students, selected from several high schools in Hanoi, Thanh Hoa, Thai Binh, and Dak Lak provinces. The result showed that during the COVID-19 epidemic period, living conditions were changed, such as isolation in the living area (22.1% of participants), reduced family income (35.9% of participants’ fathers and 37.3% of participants’ mothers salary decreased). Most children must switch to online learning (67.6%), and children tended to sleep later and wake up later (16.7% and 11.2%). Children tended to eat more meals and much food each meal than before. The percentage of children who spent over 3 hours\day using electronic devices increased during the COVID-19 epidemic (54.8% compared to 33.8% before). Our findings indicated that the COVID-19 pandemic had adverse effects on children's living conditions, lifestyles, and habits.
Research Insights: How Do High Levels of Fine Particulate Matter Impact Daily Labor Supply in Mexico City?
Authors: Hoffmann Bridget , Rud Juan Pablo
Published: July 2022

There is a negative, non-linear relationship between fine particulate matter (PM 2.5) and same-day labor supply, with strong effects on extremely polluted days. Workers partially compensate for lost hours by increasing their labor supply on days that follow high-pollution days. Informal workers reduce their labor supply less than formal workers on high-pollution days and compensate less on the following days. This suggests that informal workers may experience greater exposure to high pollution and greater reductions in labor supply and income.
La ciudad Jojutla de Juárez, Morelos -México: proceso histórico de configuración de un contexto periurbano
Authors: Rodríguez-Alarcón María Nazareth
Published: July 2022

En el último siglo, la ciudad de Jojutla se ha convertido en el polo comercial de la región sur del estado de Morelos, México. Fundada sobre asentamientos prehispánicos, a lo largo de su historia se caracterizó por la producción agrícola, principalmente de caña de azúcar y arroz. Tras la Revolución Mexicana se dieron importantes transformaciones gracias a la intensificación de la actividad comercial, el incremento demográfico y políticas de intervención urbana. El objetivo de este artículo es, precisamente, reconstruir el proceso histórico que delineó a Jojutla hasta sus particularidades actuales y, a la par, exponer la complejidad que envuelve la dicotomía rural/urbano al definir ese contexto social. El análisis se sustenta en datos emanados de la articulación y comparación de fuentes de información histórica y etnográfica, en términos de larga duración, y desde una discusión crítica sustentada en las nociones de configuración territorial y periurbanización.
La lucha antituberculosa en Bucaramanga desde la regulación del espacio físico (1916-1936)
Authors: Ortega Luis Felipe
Published: July 2022

El presente artículo expone y analiza las políticas públicas y discursos asociados al tratamiento, lucha y prevención de la tuberculosis pulmonar en los espacios físicos públicos y privados en la ciudad de Bucaramanga entre 1916 y 1936. Se pretende argumentar que las concepciones sobre la enfermedad y medidas para controlarla y combatirla propuestas por médicos, legistas y gobernantes tenían origen en las condiciones sociales, materiales y espaciales de la ciudad, y respondían a una búsqueda por la prevención de comportamientos antihigiénicos y acondicionamiento de los espacios en donde la tuberculosis tenía mayor presencia. De igual forma se reconoce la incidencia de los discursos sobre la enfermedad en los procesos de modernización urbana. Se evidencia entonces que, para el caso de Bucaramanga, espacios físicos en donde se concentraban gran cantidad de personas como escuelas, iglesias, viviendas pobres, cantinas y sobre todo la Cárcel, suponen las principales fuentes de contagio de dicha enfermedad y, por consiguiente, los espacios que son objeto de intervención de políticas que procuraron por una Higiene Urbana.
How M5 Model Trees (M5-MT) on Continuous Data Are Used in Rainfall Prediction: An Experimental Evaluation
Authors: Fayaz Sheikh Amir , Zaman Majid , Kaul Sameer , Butt Muheet Ahmed
Published: July 2022

When using machine learning to predict a class with a continuous numeric value, there are several issues. Only a few machine-learning approaches are capable of doing so, but it remains one of the most difficult jobs to do. In this paper, we show how to use the M5 Model Tree, an approach that can handle continuous numeric data. This method is a stepwise procedure that employs linear functions at the leaf nodes of any created decision tree inducer (such as CART). These M5 model trees provide basic practical formulas such as standard deviation (SD), standard deviation reduction (SDR), cost-complexity pruning (CCP), and so on, which may be simply applied to different benchmark data by another user. This study examines the M5 Model Tree algorithm's capabilities for analysing rainfall data in the Kashmir portion of India's Union Territory of Jammu & Kashmir. One of the best suited models was the M5 model tree, which was built using (70–30) percent training and test ratios, respectively, and predicted an RMSE of 2.593, an MAE of 1.68, and a correlation coefficient (R2) of 0.478. Furthermore, M5 model trees produce models with a minimal number of trails, requiring less computing effort and making them more practical to use.
Arabic Language Modeling Based on Supervised Machine Learning
Authors: Mahmoudi Omayma , Bouami Mouncef Filali , Badri Mustapha
Published: July 2022

Misinformation and misleading actions have appeared as soon as COVID-19 vaccinations campaigns were launched, no matter what the country’s alphabetization level or growing index is. In such a situation, supervised machine learning techniques for classification appears as a suitable solution to model the value & veracity of data, especially in the Arabic language as a language used by millions of people around the world. To achieve this task, we had to collect data manually from SM platforms such as Facebook, Twitter and Arabic news websites. This paper aims to classify Arabic language news into fake news and real news, by creating a Machine Learning (ML) model that will detect Arabic fake news (DAFN) about COVID-19 vaccination. To achieve our goal, we will use Natural Language Processing (NLP) techniques, which is especially challenging since NLP libraries support for Arabic is not common. We will use NLTK package of python to preprocess the data, and then we will use a ML model for the classification.
Electromyography Signal Analysis for the Detection of TMJ Disorder Using Classification Models and Multivariate Analysis
Authors: Kakkeri Roopa B. , Bormane Dattatraya S.
Published: July 2022

Temporomandibular joint (TMJ) disorder is a wide term that encompasses a variety of disorders with varying etiologies. The purpose of this study was to analyses electromyographic signals with wavelet transform for the diagnostic methods which help in TMJ issues in patients who visited the Dental Centre. Due to the increasing importance of electromyography signals in diagnosing muscular disorders, such as temporomandibular joint disorder, it has been widely used. Through various techniques, such as discrete wavelet transform and power spectral density, it is possible to identify and minimize the noise in the signals, which can be very useful in the diagnosis of the disorder. This paper presents an algorithm that combines the features of discrete wavelet transform and multivariate analysis in order to detect temporomandibular joint disorder. Support vector machine model is giving the better performance in terms of training, testing time and accuracy with 93% compared to other models. Multivariate analysis shows the significant difference in the feature variable chosen.
Experimental investigations and kinetics of hydrogen oxidation by oxygen in the media of carbon dioxide under elevated pressure at fiber-glass Pt/Pd catalysts
Authors: Zagoruiko A. N. , Lopatin S. A. , Mikenin P. E. , Elyshev A. V.
Published: July 2022

The study is dedicated to the performance of glass-fiber catalysts (GFCs) in the practically important reaction of hydrogen oxidation by oxygen in the media of carbon dioxide at elevated pressures. The samples of the catalysts were synthesized using Pt and Pd as active metals and thermostable high-silica glass-fiber textiles both unpromoted and promoted by Zr. The used catalyst preparation methods include surface thermal synthesis and leaching/impregnation approaches. All three tested samples showed approximately equal activity, but the preference was given to Pt-based GFC synthesized by means of surface thermal synthesis method because it uses the much cheaper and widely available glass-fiber textile instead of rare and expensive Zr-promoted materials. Resource testing of this catalyst for more than 200 hours demonstrated its high stability. The reaction rate may be described by kinetic equation corresponding to mass-action law with linear dependence upon the reaction pressure. The studied GFC may be arranged into structured cartridges with low pressure drop and highly intensive heat and mass transfer under the commercial process conditions, so its further practical application looks promising.
The effect of the nature of metal-containing anions on the catalytic properties of imidazolium derivatives immobilized on silochrom in oxidative desulfurization
Authors: Tarkhanova I. G. , Ali-Zade A. G. , Buryak A. K. , Zelikman V. M.
Published: July 2022

Two types of catalysts – Fenton catalysts based on Cu(I) and Fe(III), and polyoxometalates Mo(VI) and W(VI) – were compared in the oxidation of sulfur-containing compounds by hydrogen peroxide and desulfurization of oil stock. Heterogeneous samples were represented by imidazolium salts chemically anchored on the silochrom surface and containing chloride complexes of iron and copper or anions of phosphomolybdic and tungstophosphoric acids. Thiophene (T), dibenzothiophene (DBT) and methyl phenyl sulfide (MPS) as well as the diesel fraction with the initial sulfur content of 1080 ppm were used as the model substrates. The reactivity of thiophene substrates was found to depend on the nature of metal-containing anions: on Cu and Fe catalysts, thiophene > DBT, while on polyoxometalate catalysts, DBT > thiophene. This effect was interpreted using literature data. The catalyst based on tungstophosphoric acid provided desulfurization of the diesel fraction of oil to the sulfur content < 10 ppm, which corresponds to modern environmental standards.
The effect of iron oxide content in bentonite clay in the catalytic composition on the distribution of sulfur in the cracking products of the model sulfur-containing feedstock
Authors: Bobkova T. V. , Dmitriev K. I. , Potapenko O. V. , Doronin V. P. , Sorokina T. P.
Published: July 2022

The study revealed the effect of a clay with different content of iron oxides introduced into the cracking catalyst composition on the distribution of feedstock sulfur in the products and on the amount of sulfur oxides formed upon regeneration of the coked catalyst after cracking of the model sulfur-containing feedstock with a sulfur content of 10 000 ppm from 2-methylthiophene or benzothiophene. The use of a sulfur compound with a higher molecular weight increased the fraction of the feedstock sulfur passing into liquid products and coke. When iron oxidecontent in the catalyst was increased from 0.61 to 1.53 wt.% upon cracking of the model feedstock, the yield of liquid products increased, the conversion of model hydrocarbon decreased, and the yield of coke on the catalyst grew from 3.8 to 5.2 wt.%; in the process, the fraction of the feedstock sulfur that passed into SO2 increased fourfold.
A Qualitative Exploration of Successful High School Baseball Coaches' Silence During Practice
Authors: McGaha Patrick , Barney David C.
Published: July 2022

For athletic coaches, there are many methods to coach athletes. One method that may not be as common, or even thought of as coaching, is silence. Silence is when the coach does not speak but is thinking of specific team, player, and competitor items. The purpose of this study was to interview consistently successful high school baseball coaches with an emphasis on their silence as a coaching behavior. Five successful high school baseball coaches in the southeastern United States were interviewed. Generally, it was found baseball coaches were strategizing, or thinking of baseball-related items while being silent during practice. The results from this study are a valuable addition to the literature, showing that coaching is not only about talking or yelling but also about a coach’s silence, a powerful form of coaching.
Examining Different Foci of Attention on Golf Putting Performance in Novice Learners
Authors: Chen Chih-Chia (JJ) , Ryuh Yonjoong , Luczak Tony , Lamberth John
Published: July 2022

Although research has leaned toward an external focus, there is no consensus on the optimal distance of the attentional focus for novice learners. The purpose of this study was to examine which type of attentional focus is beneficial for the novices performing golf putting task. Forty-five novice learners (23 males, 22 females), aged 20 to 37, participated in this study. Participants were randomized into the attentional focus of attention (FOA) conditions of internal (i.e., focus on the arm movement), external-proximal (i.e., focus on the golf club), and external-distal (i.e., focus on the target). Each participant was requested to perform four blocks of 10 putts on an artificial putting surface. The total number of putts made, total putt points achieved, and perceived confidence for each putt were recorded. A 4 (block) × 3 (condition) mixed-design analysis of variance was applied for data analysis. The external-proximal FOA condition had significantly better performance (i.e., more putt points) than the external-distal FOA condition. Under the internal FOA condition, participants significantly made more golf putt points during the third and fourth blocks than the first block. Perceived confidence was significantly elevated during the third block and fourth block compared to the first block across all conditions. Postexperimental manipulation check showed most participants adopted the focus as they were instructed. The external-distal FOA may be detrimental for novice learners in skill acquisition. Putting performance was related to the perceived confidence for the golf stroke. Therefore, it is recommended that practitioners consider the OPTIMAL theory by facilitating external-proximal FOA and the motivational factor together for novice learners.