bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of methane migration in the shallow subsurface from a gas pipe leak
Authors: Gao Bo , Mitton Melissa K. , Bell Clay , Zimmerle Daniel , Deepagoda T. K. K. Chamindu , Hecobian Arsineh , Smits Kathleen M.
Published: July 2021

With the increased use of natural gas, safety and environmental concerns from underground leaking natural gas pipelines are becoming more widespread. What is not well understood in leakage incidents is how the soil conditions affect gas migration behavior, making it difficult to estimate the gas distribution. To shed light on these concerns, an increased understanding of subsurface methane migration after gas release is required to support efficient leak response and effective use of available technologies. In this study, three field-scale experiments were performed at the Methane Emission Technology Evaluation Center in Colorado State University to investigate the effect of soil textural heterogeneity, soil moisture, and leak rate (0.5 and 0.85 kg/h) on methane migration caused by leaking pipelines. Subsurface methane concentrations, in addition to soil moisture and meteorological data, were collected over time. A previously validated numerical model was modified and used to understand the observed methane distribution behavior. Results of this study illustrate that the influence of soil texture, leak rate, and moisture on subsurface methane distribution is determined by the relative contribution of advection and diffusion and closely related to the distance to the leak source. Advection dominates gas transport within 1–1.5 m of the leak source, driving the migration of high concentration contours. Beyond this distance, diffusion dominates migration of lower concentration contours to the far-field. Although large leak rates initially result in faster and further gas migration, the leak rate has little influence on the diffusion dominated migration farther from the leak source. Soil moisture and texture complicate gas behavior with texture variations and elevated soil moisture conditions playing a dominant role in locally increasing methane concentrations. Scenarios highlight the importance of understanding the effects of soil moisture, texture, and leak rate on gas migration behavior in an attempt to unravel their contribution to the gas concentration within the soil environment.
Birth Control, Border Control
Authors: Murillo Lina-Maria
Published: July 2021

Betty Mary Goetting opened the first birth control clinic on the U.S.-Mexico border in 1937. The rhetoric she used to advocate for contraception in El Paso, Texas, paralleled eugenic trends in the birth control movement nationwide, focused on curbing fertility rates among those considered of poor mind and body. Where previous studies focus on the urban North, this borderlands case study places the birth control movement’s attention to overpopulation within the context of immigration restrictions at the U.S.-Mexico border. Goetting’s birth control campaigns, supported by the movement’s pioneer Margaret Sanger, targeted Mexican-origin women as part of a larger process that sought to protect the body politic from non-white immigrants while simultaneously exploiting their labor. Despite Catholic backlash against birth control and the racist rhetoric of Anglo birth control advocates, Mexican-origin women enthusiastically visited the El Paso birth control clinic. Given the dearth of health care afforded working-class, Mexican-origin women at this time, hundreds of women used the clinic’s services for their own purposes—reminding us that birth control movements offer a paradox of coercion and choice.
Demandas físicas de jugadores profesionales costarricenses de fútbol: Influencia de la posición de juego y nivel competitivo
Authors: Morera-Barrantes Roy , Calderón-Chaverri Carlos , Gutiérrez-Vargas Randall , Rojas-Valverde Daniel , Gutiérrez-Vargas Juan Carlos , Ugalde Ramìrez Jose Alexis
Published: July 2021

Monitoring physical demands during soccer matches with GPS technologies provides valuable information that can be used to enhance sports performance. Therefore, this study aimed to know Costa Rican professional soccer players' physical demands and analyze the influence of the playing position and the competitive level during matches. Sixty male soccer players, 50 from the first division of Costa Rican soccer and 10 from an absolute national CONCACAF (SAC) team were monitored with a Global Positioning System (GPS) to quantify kinematic variables such as distance traveled (m), total and different intensities (Z 1-5), maximum speed (km/h), total impacts (g), accelerations (m / s) and decelerations (m/s). The game positions were categorized into defenses (Def), midfielders (Mid) and forward (For), and the competitive level in a) SAC, b) Elite level teams (ENE), and c) Sub-elite level teams (ENS). The results reflected significant differences regarding the competitive level in the distance traveled at different intensities Z1 (SAC >ENS >ENE), Z2 (ENE >SAC >ENS) and Z4 (ENE >SAC >ENS), in accelerations (SAC >ENE >ENS), and in decelerations (SAC >ENS >ENE). By game positions, the differences were in the total distance (Mid >Def >For), in the distance traveled in Z2 (Mid >Def >For) and Z3 (Mid >Def >For), as well as in total impacts (Mid >Def >For). It is concluded that the competitive level influences the physical demands. SAC registered more accelerations and decelerations, and ENE traveled a greater distance with moderate and intense efforts. There were differences between playing positions; midfielder traveled longer distances and recorded more impacts.
Investigación de las variables que determinan los niveles de autoestima en los escolares centroamericanos: Un modelo de regresión logística binaria
Authors: Álvarez Bogantes Carlos , Herrera-Monge María Fernanda , Herrera-González Emmanuel , Araya-Vargas Gerardo A.
Published: July 2021

The purpose of this research was to examine the relationships between the levels of self-esteem of Central American schoolchildren and their physical activity habits, ages and countries of origin. This was a correlational study of random cluster probabilistic samples, which evaluated 5,291 students enrolled in fourth, fifth and sixth grades, 52.3% of whom were girls and 47.7% boys, from 74 schools in Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and Panama, with an average age of 10.90 ± 1.13 years. Lawrence’s Self-Esteem Questionnaire (LAWSEQ) was used to measure levels of self-esteem, and the physical activity questionnaire for boys and girls (PAQ-C) was applied in all the countries. A binary logistic regression analysis was carried out to estimate the statistical probability that the independent variables (age, level of activity and country of origin) could predict the level of self-esteem. The results of this investigation showed that 47% of the children studied perceive themselves to have a low level of physical activity, and that children from 9 to 10 years had lower percentages of self-esteem with 51.6% and 47.7%, respectively. In terms of country of origin, children from Costa Rica and Guatemala have a better level of self-esteem than those living in El Salvador, Nicaragua, Honduras and Panama. In addition, it was determined that age, level of physical activity and country of origin predicted 58% of the level of self-esteem of Central American children. This shows the importance of promoting physical activity in childhood to contribute to the development of self-esteem.
Relación entre las características antropométricas de masa muscular de extremidad inferior y la potencia de salto de jóvenes deportistas
Authors: Benavides-Roca Luis , Salazar Orellana Cristian , Díaz Coria Gastón
Published: July 2021

La antropometría regional resulta ser un procedimiento importante en la proyección del desempeño de un deportista. El objetivo del presente estudio es relacionar las características antropométricas de extremidad inferior con la potencia de salto en jóvenes deportistas. Se utilizó una metodología correlacional donde se evaluaron a 44 deportistas juveniles (30 hombres y 14 mujeres), a los cuales, se les midió la altura del salto en sentadilla de 90° (SJ), contra movimiento con manos fijas (CMJ-MF) y contra movimiento con manos libres (CMJ-ML). Estas variables derivaron al cálculo de potencia. Junto con esto se determinó características antropométricas de miembro inferior vinculados a pliegues cutáneos y perímetros, obteniendo valores de muslo medio (MMED) y máximo (MMAX), perímetro corregido de pantorrilla (PCP), área de sección muscular de cuádriceps (ASMC), área de sección muscular de isquiotibial (ASMI) y área de sección muscular total de muslo (ASMM). Los resultados mostraron una correlación significativa entre el perímetro corregido de pantorrilla y la potencia de salto en SJ (r=0,73; p=0,00), CMJ-MF (r=0,72; p=0,00) y CMJ-ML (r=0,7; p=0,00). En conclusión, el perímetro de pantorrilla presentó componentes relacionados a la potencia de salto de los deportistas juveniles.
Contradicciones ineludibles.A propósito del estatuto de alteridad radical de las “hembras colonizadas”
Authors: Parra Fabiana , García Gualda Suyai
Published: July 2021

A lo largo de su obra -singularmente atenta a las contradicciones, la complejidad y las coaliciones- María Lugones nos deja como legado el proyecto teórico político de llevar la lucha antirracista al centro de la lucha feminista; puesto que, siguiendo un análisis lógico, un feminismo que no es antirracista, es racista. La pensadora decolonial caracteriza el sistema de género colonial moderno y capitalista como excluyente del principio de no contradicción, al estar basado en dicotomías jerárquicas. En este marco de análisis, el estatuto de las hembras colonizadas es el de alteridad radical. A partir de esta tesis, Lugones examina los aportes decoloniales para la construcción de una teoría política de los feminismos latinoamericanos. En este sentido, surge como planteamiento del problema: ¿sostener la tesis decolonial implica llevar -hoy- la política contra el racismo al centro de la política feminista? A manera de hipótesis, “tomar en serio” la tesis de Lugones implica radicalizar la crítica al feminismo occidental hegemónico en su complicidad con el racismo global.
Olinta Ariosa Morales: precursora de la bibliotecología y las bibliotecas en Cuba
Authors: Ruíz García Miriam Caridad , Paz Enrique Luis Ernesto , Guerra Miranda Cándida Judith
Published: July 2021

Olinta Ariosa Morales constitutes a relevant personality in the Cuban library field. She had extensive work at the head of various responsibilities that shaped the structure of contemporary Cuban librarianship. In the absence of research devoted to personality, the objective was to establish the contributions made to Cuban librarianship by Ph D. Olinta Ariosa Morales. The research classified as historical and is developed from a qualitative perspective. The biographical method was selected for its implementation. To obtain results, methods were used at the theoretical and empirical levels, fundamentally life history. She highlighted the use of the in-depth interview technique, which was applied to colleagues, family members and students of Olinta's life. The main conclusions are that once Olinta graduated as a Doctor of Philosophy and Letters, she worked as a librarian assistant at the Universidad Central "Marta Abreu" de Las Villas. Between the years 1959 - 1999 Olinta worked as a librarian and director in various institutions, among which her appointment as director of the "José Martí" National Library of Cuba stands out. She was the first president of the board of directors of the Cuban Association of Librarians. In honor of all his work in the field of librarianship, it was established in Cuba on April 14, as the Day of the School Librarian in honor of the birth of Olinta and in 2004 the "Olinta Ariosa Morales National Award" was created to recognize librarians schoolchildren.
Análisis multicriterio para el desarrollo urbano en zonas costeras en un contexto de cambio climático: Caso en Acapulco, México
Authors: Guerrero-Morales Jesús , Sampedro-Rosas Laura , Ruz-Vargas Manuel Ignacio , Silva Gómez Sonia Emilia , Fonseca Carlos Roberto , Gómez-Albores Miguel Ángel
Published: July 2021

[Introducción]: El crecimiento urbano en zonas costeras de América Latina pone en riego a la población y contribuye al cambio climático. [Objetivos]: El objetivo de la presente investigación es generar una metodología que a futuro identifique la aptitud territorial para el desarrollo urbano en municipios costeros, considerando medidas de mitigación y adaptación al cambio climático, aspectos fisiográficos y político-administrativos. [Metodología]: Este estudio presenta el uso de sistemas de información geográfica (SIG) y la técnica del análisis de decisiones de criterios múltiples (MCDA, por sus siglas en inglés) para la selección de zonas idóneas para el desarrollo urbano en el municipio de Acapulco de Juárez, México. [Resultados]: Se crearon mapas temáticos del promedio de índices de vegetación, de la recarga potencial de agua subterránea, de tenencia de la tierra, de peligro de inundación, de restricciones de zonas urbanas existentes y de cuerpos de agua; posteriormente, se integraron en un MCDA para dotar de zonas urbanas aptas a futuro. En los resultados, se identificaron 367 km2 idóneos para el desarrollo urbano con menor impacto al ecosistema y a la vez, no son un riesgo para la población; asimismo, se identificaron zonas intermedias y no aptas que representan un peligro para la población y al ecosistema. [Conclusiones]: Este trabajo hace posible planear el territorio como una medida de mitigación y adaptación al cambio climático con el MCDA a través de SIG, en una zona afectada por los fenómenos hidrometeorológicos y una población en condiciones socioeconómicas adversas.
Redescubriendo la pedagogía de la esperanza de Paulo Freire
Authors: Vílchez Quesada Enrique
Published: July 2021

This essay rediscovers an important work of the Latin American thinker Paulo Freire called Pedagogy of Hope: Reliving Pedagogy of the Oppressed that he published in 1992. After having been subject to intense ideological and political persecution in his country of origin Brazil and in exile, Paulo Freire, with a full maturity granted by years and experience, redefines in the Pedagogy of Hope, the principles of his Pedagogy of the Oppressed, being a faithful witness of the praxis aimed at the emancipation of the oppressed and of the oppressor. This essay recounts, in a contemporary framework, the main reflections evoked by Freire with the hope of rehabilitating in the educational act, and its essential role as an engine of change, a disregard of the truth, which is an indispensable resource towards the search for social justice.
Los caminos del olvido y los rituales políticos durante el gobierno de la conciliación nacional en Costa Rica (1958-1962)
Authors: Ugalde Quesada Alexia
Published: July 2021

Este artículo plantea que durante el gobierno de Mario Echandi Jiménez (1958-1962) se dio un proceso de conciliación nacional, analizado mediante la implementación de lo que hemos llamado «medidas de compensación» y «rituales políticos de inclusión», los cuales favorecieron a los perdedores de la guerra civil de 1948. Por ejemplo, el regreso de Rafael Ángel Calderón Guardia a Costa Rica y la declaración de una segunda amnistía para todas las personas vinculadas con el conflicto bélico. Por último, se concluye que el proceso de conciliación nacional también se vio favorecido por la intensificación del movimiento opositor a la dictadura somocista, pues esto generó una nueva configuración del «enemigo» caracterizándolo como extranjero, a su vez, esto promovió la unidad interna.
Militarización visual en momentos de crisis: Los casos de Lenin Moreno y Sebastián Piñera durante las movilizaciones de octubre de 2019
Authors: Verdes-Montenegro Francisco J.
Published: July 2021

Faced with the renewed prominence acquired by the military factor in Latin America and in particular the role that castrenses have played in various crises that have shaken the region throughout 2019, from Venezuela to Bolivia, through Ecuador or Chile, this work delves into what is defined as a process of “remilitarization” in the region. Specifically, it delves into a new feature int the armed forces in Latin America: being used with a visual component in situations of political crisis or when the policy-makers power is questioned. Therefore, first, the work deeps on the theoretical-methodological discussions in International Relations to analyze this visual component. Subsequently, the dynamic of remilitarization that emerged in Latin America will be presented from a historical perspective, pointing out its main features as well as the effects in the region. And in the end, it will be completed with a visual and verbal discourse analysis of qualitative character that will pay attention to the role played by the Latin American armed forces in two political crises that have erupted during October 2019 in the region: Ecuador and Chile. Then, a double message is projected visually: on one hand, the support of the Armed Forces when the president’s leadership is questioned; and on the other side, the attempt to dissuade those who support protests.
Una nueva mirada hacia el mundo del trabajo Reseña del libro: Sotelo, A. (2019). Estados Unidos en un mundo en crisis. Geopolítica de la precariedad y la superexplotación del trabajo. Anthropos.
Authors: Lanzoni-Pérez Daniela
Published: July 2021

In the academia the capitalist approach is widely recognized; in this book Adrián Sotelo proposes to distance from it, revealing many of its negative features in society regarding working conditions (such as precariousness and exploitation), with a special interest in Latin America as a result of the dependence on the United States. This book review highlights three thematic axes to understand Sotelo's argument, which is close to the Marxist theory and Ruy Mauro Marini's ideas.
Thermodynamic properties of alloys In—Tb system
Authors:   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Dudnik A.S. , Kudin V.G ,   Taras Shevchenko National University of Kyiv, Romanova L. O. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Sudavtsova V. S. ,   Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine
Published: July 2021

The method of isoportic calorimetry investigated the thermochemical properties of the melt In—Tb system in the range of compositions 0 < xIn < 0,4 at 1625 ± 1 K. The obtained data were extrapolated on a non-investigated concentration interval, given that when xTb = 1 integral and partial to Tb enthalpia mixing is zero. It was established that the first partial for Terbium and the minimum enthalpy of mixing is –145 ± 7 and –40,1 ± 0,2 kJ/mol respectively. Comparison of ΔHmin, the melt of five previously investigated In—Ln systems from the serial number Ln (zLn), together with the data obtained in this papper, showed that they are described by one trend line. For ΔHmin In—Eu (Yb) melts (Yb) are very slight deviations from the trend line. But for dimensional factor, these deviations from the trend line are more significant. Enthalpia of the formation of some In—Ln intermetallides are known, with most of them relate to the LnIn3 compound. But there is no full reconciliation between these data. The results of the most modern work exhibit less dependence on the serial number of lanthanides and are more exothermic for heavy lanthanides, compared with other data. Comparing thermochemical properties of double Sn (Sb) —REM melt systems. It has been established that the energy of the interaction between the data p-elements and REM increases in such a sequence: In-REM → Sn—REM → Sb—REM. This is due to the fact that the stibium is the best acceptor of electrons. Keywords: thermochemical properties, melts, compounds, In, Tb.
Reflexiones críticas sobre el Índice de resiliencia epidemiológica municipal utilizado para la toma de decisiones de política pública en el control de la pandemia por COVID-19 en Colombia
Authors: Eslava-Schmalbach Javier , Restrepo-Henao Alexandra , Guarnizo-Herreño Carol , Castillo Juan Sebastián , Vega-Romero Roman , Arbeláez María Patricia , Pardo-Turriago Rodrigo , Diaz Paula Andrea , Gaitán-Duarte Hernando , Cantor-Cruz Francy , Osorio Lyda , Andia Tatiana , Gómez-Restrepo Carlos
Published: July 2021

El 2 de junio de 2021, el Ministerio de Salud y Protección Social de Colombia expidió la Resolución 777, mediante la cual se determinan las condiciones para el reinicio de todas las actividades económicas y sociales restringidas. Asimismo, en esta resolución se define el Índice de resiliencia epidemiológica municipal (IREM) como la herramienta para apoyar la toma de decisiones relacionadas con esta reactivación económica en medio del tercer pico epidémico de la COVID-19 en el país. El objetivo de este artículo es hacer un análisis crítico de los aspectos técnicos del IREM y explorar la conveniencia de su implementación como soporte del reinicio de las actividades económicas y sociales propuesto en la resolución. Dentro de este análisis crítico se destaca la falta de una clara definición de resiliencia epidemiológica que se ajuste a la literatura científica. Además, se cuestiona tanto la validez de apariencia, contenido y constructo del índice global, como la validez del constructo de sus dimensiones y, por tanto, la pertinencia de usarlo como herramienta para definir dicho reinicio.
Stevens-Johnson syndrome and herpes simplex reactivation associated with paracetamol use. Case report
Authors: Hoyos-Samboní Diego Fernando , Munar Julián Vicente , López-Valencia David , Vásquez-Arteaga Luis Reinel
Published: July 2021

Introduction: Stevens-Johnson syndrome (SJS) is a rare disease that affects the skin, as well as the oral, ocular, and urogenital mucous membranes. This condition is caused by drug reactions in more than 50% of cases.
Case presentation: A 20-year-old male visited the emergency service of a tertiary care hospital of Popayán due to a 10-day history of asthenia, adynamia, fever (without objective measurement records), cough with scarce whitish sputum, and headache that improved with paracetamol treatment. However, his condition worsened in the last two days, and he developed hyporexia, pharyngeal pruritus, vesicles, and blisters on the corners of the mouth, the oral mucosa, the trunk, and limbs, as well as breathing difficulty and odynophagia, prompting him to seek medical treatment at the ER. At first, disseminated herpes simplex, systemic lupus erythematosus and SJS were suspected, but based on clinical and laboratory findings, the patient was finally diagnosed with SJS with herpes simplex reactivation associated with the use paracetamol. Consequently, the administration of this drug was stopped and management with acyclovir and methylprednisolone was started. The patient progressed satisfactorily and was discharged 10 days after beginning the new treatment, and his general condition was optimal during follow-up appointments.
Conclusion: The occurrence of SJS may be associated with the oral administration of paracetamol; nevertheless, its use is not discouraged due to its great overall benefits. In this sense, given that paracetamol is an over-the-counter drug widely used in Colombia, recognizing the clinical manifestations of SJS is essential to provide adequate management and avoid complications in cases such as the one reported here.
Iniciativas de acción de política contra la obesidad en Colombia: una revisión de la literatura a partir de la metodología del marco NOURISHING
Authors: Muñoz-Ruiz Melisa Alejandra , González-Zapata Laura Inés , Cediel Gustavo
Published: July 2021

Introducción. En Colombia la obesidad es un problema de salud pública que el gobierno debe abordar mediante iniciativas de acción de política (IAP), es decir, acciones gubernamentales que pueden estar implementadas o no.
Objetivo. Identificar, mediante la metodología del marco NOURISHING, las IAP y las evaluaciones de acción de política (EAP) contra la obesidad formuladas en Colombia desde 2005.
Materiales y métodos. La búsqueda se realizó entre marzo y agosto de 2019, con una actualización en agosto de 2020, de la siguiente manera: IAP: en sitios web del gobierno y de organizaciones de la sociedad civil; EAP: en PubMed, SciELO y el repositorio Sinergia. Las IAP se clasificaron en las áreas de política de NOURISHING.
Resultados. Se encontraron 42 IAP con 82 líneas de actuación: 16 (24 líneas) implementadas, 17 (37 líneas) no implementadas, y 9 (21 líneas) sin información suficiente para determinar su implementación (21 líneas). Las IAP abordan todas las áreas de política del marco NOURISHING. Las IAP implementadas tienen más líneas en el área “Habilitar acciones multisectoriales y de suministro de alimentos” (8/24), mientras que las no implementadas, en “Restringir la publicidad de alimentos y bebidas” (10/37). Se identificaron 13 EAP, donde la mayoría fueron sobre IAP en seguridad alimentaria orientadas al suministro de alimentos (4/13).
Conclusiones. Colombia tiene IAP que abarcan todas las áreas de política del marco NOURISHING. Las IAP implementadas se enfocan en el suministro de alimentos y las no implementadas, en medidas regulatorias. Urge promulgar IAP regulatorias, con una evaluación y seguimiento adecuados, que permitan mejorar los hábitos alimentarios de la población colombiana y prevenir la tendencia creciente de obesidad.
Biofabricación de corazones en Colombia como un proyecto nacional
Authors: Tabares-González Juan Hember
Published: July 2021

La biofabricación de corazones es una actividad emergente que involucra la tecnología y en la cual el Estado colombiano debería invertir para satisfacer la demanda en salud, ofrecer empleo a profesionales altamente calificados y desarrollar un sector laboral que producirá altas ganancias en las próximas décadas.
Um estudo didático da dinâmica de spins
Authors: Ricardo de Sousa J. , Dartora C. A.
Published: July 2021

A dinâmica do spin é um dos problemas mais importantes da Física Moderna e seu estudo rendeu o prêmio Nobel de Física a vários cientistas importantes do século XX, cabendo destacar os nomes de Rabi, Bloch e Purcell. No entanto, dada a complexidade matemática associada ao problema do spin ½, cuja compreensão requer ao menos conhecimentos rudimentares de teoria de grupos e representações do grupo das rotações, normalmente não é abordado com a profundidade desejada em cursos de graduação. Dessa forma, o presente trabalho pretende suprir essa lacuna através da apresentação concisa e auto contida das ferramentas necessárias para a compreensão da dinâmica do spin e suas aplicações práticas. Sempre que possível, os eventos históricos mais importantes são mencionados. Os postulados fundamentais da mecânica quântica e da teoria do grupo das rotações são apresentados em um grau de profundidade suficiente para a compreensão dos principais conceitos associados ao spin. As equações de Bloch, não incluindo efeitos dissipativos, essenciais para a compreensão da ressonância magnética nuclear (RMN) são apresentadas a partir de primeiros princípios e resolvidas no caso do referencial girante.
A minimally invasive technique for primary tooth extraction: a case report
Authors: BORGO Gabriela Oliveira , SOUSA Karina Guedes de , MOREIRA Kelly Maria Silva , PUPPIN-RONTANI Regina Maria
Published: July 2021

ABSTRACT Root resorption is characterized by the loss of cementum and / or dentin from the tooth root as a result of internal or external odontoclastic action. This case reports a premature cervical root resorption of deciduous teeth in an 8-year-old boy. Large root resorption on the mesial faces of the maxillary and mandibular right and left deciduous canines (teeth #53, #63, #73 and #83), with asymptomatic pulp involvement, was detected during routine radiographic examination for orthodontic planning. The patient was managed with extraction of the affected teeth using two different techniques: conventional and alternative. The conventional technique, forceps, was used for the maxillary and mandibular left canines (teeth #63 and #73). And alternative technique using the periotome device, usually required for extraction during dental implant surgery, was used for the maxillary and mandibular right canines (teeth #53 and #83). The periotome device showed to be an alternative to improve pediatric surgery due to better patient behavior and healing, and to reduced procedure length.
Adaptação cultural do questionário Expected Consequences of Hearing aid Ownership para o português brasileiro
Authors: Pereira Stefanie Vitória Rodrigues , Fernandes Taynara , Alves Heloisa de Miranda Cantuaria , Mondelli Maria Fernanda Capoani Garcia
Published: July 2021

RESUMO Objetivo traduzir e adaptar culturalmente o questionário Expected Consequences of Hearing aid Ownership para aplicação na população brasileira. Métodos o Expected Consequences of Hearing aid Ownership é constituído por 15 questões e investiga a expectativa de adultos com perda auditiva quanto ao uso de aparelho de amplificação sonora individual. A tradução foi realizada por três professores tradutores-intérpretes de inglês, que não tiveram contato prévio com o instrumento. Um grupo revisor constituído por um profissional da Fonoaudiologia, um da Psicologia e do Serviço Social, reuniu a melhor tradução encontrada para cada questão em um único questionário em português. Para melhorar a qualidade da tradução, outros três tradutores realizaram nova versão para o inglês e o grupo revisor analisou, comparando-as com o original. Para pré-testagem, o questionário foi aplicado por dois avaliadores em 30 pacientes com diagnóstico de deficiência auditiva. Resultados foi realizada a tradução para o português: “Questionário de Expectativa com Uso de Auxiliares Auditivos”. Durante o processo de tradução, houve pequenas diferenças entre as versões, sendo, em sua maioria, referentes à tradução literal. Para a adaptação, as três traduções foram analisadas e, por consenso, foram escolhidas as melhores expressões e palavras em todas as questões, adaptando o texto ao conhecimento e compreensão da população brasileira. Conclusão o questionário Expected Consequences of Hearing aid Ownership encontra-se traduzido e adaptado para a cultura brasileira e pode ser utilizado como importante ferramenta para fonoaudiólogos no conhecimento das expectativas do paciente e melhor delineamento do processo de reabilitação.
Fonoaudiologia, gerontologia e a apneia obstrutiva do sono: relato de caso
Authors: Silva Danielle Barreto e , Corrêa Camila de Castro
Published: July 2021

RESUMO A eficácia da terapia fonoaudiológica está comprovada para a apneia obstrutiva do sono (AOS), principalmente para a população adulta. Entretanto, estudos com população acima de 65 anos são escassos. Assim, o objetivo do presente estudo foi analisar a evolução clínica longitudinal de um sujeito idoso com AOS submetido à terapia miofuncional orofacial (TMO). Caso clínico, sexo masculino, 72 anos, com AOS, submetido à TMO após ter realizado avaliação clínica, exames de polissonografia (PSG) e avaliação clínica otorrinolaringológica, bem como a aplicação da escala de sonolência de Epworth, a classificação de Mallampati e a avaliação fonoaudiológica miofuncional orofacial em três momentos distintos: antes da TMO, após a TMO e após 22 meses da TMO. A TMO se configurou na realização de exercícios isométricos e isotônicos para região orofacial e faríngea, treino funcional em sessões semanais de 30 minutos, durante cinco meses, quando, então, as sessões foram espaçadas. Após os 22 meses de TMO, observaram-se evoluções nos parâmetros objetivos e subjetivos relativos ao sono, que foram analisados e identificados por meio de uma nova polissonografia (PSG), com os seguintes dados: exame basal, 24,5 eventos/hora e último exame de 4,63 eventos/hora. Verificou-se acentuada melhora da sonolência diurna excessiva e, ainda, melhora dos parâmetros miofuncionais orofaciais. Deste modo, pôde-se constatar que a TMO demonstrou resultados eficientes e eficazes na intervenção e no tratamento terapêutico fonoaudiológico, tendo como base a AOS do paciente idoso. Ressalta-se que tais resultados foram acompanhados e controlados por meio de avaliação multidisciplinar de modo longitudinal.
Resveratrol ameliorates neuronal apoptosis and cognitive impairment by activating the SIRT1/RhoA pathway in rats after anesthesia with sevoflurane
Authors: Zhou Qiaoyun , Deng Yingfeng , Hu Xuelian , Xu Yinye
Published: July 2021

Studies have shown that long-term exposure to sevoflurane (SEV) may cause postoperative cognitive dysfunction. This study aimed to investigate the effects of resveratrol (RES) treatment on the changes in the cognitive function of rats after prolonged anesthesia with SEV. Seventy-six adult male rats were used in this study. The SEV model was established under continuous anesthesia for 6 h. Rats were randomly classified into four groups as follows: control, SEV+vehicle, SEV+pre-RES (RES was administered 24 h before establishing the SEV model), and SEV+post-RES (RES was administered 1 h after establishing the SEV model) groups. Neurobehavioral outcomes and the potential mechanism underlying RES-mediated neuroprotection through the SIRT1/RhoA signaling pathway were evaluated. The water maze test showed that long-term exposure to SEV may lead to loss of learning and memory ability in rats (p<0.05). Compared with the SEV+vehicle group, the RES treatment groups showed significantly improved neurobehavioral scores (p<0.05). Additionally, the SEV+pre-RES group had a better outcome than the SEV+vehicle group on days 1 or 2 (p<0.05), unlike the SEV+post-RES group (p>0.05). Western blotting showed that SIRT1, RhoA, and cleaved Caspase-3 (CC3) expression significantly increased in the SEV+vehicle group (p<0.05), while Bcl2 expression decreased (p < 0.05). RES treatment further upregulated SIRT1 and Bcl2 expression and downregulated the expression of RhoA and CC3 (p<0.05). In conclusion, RES treatment improved cognitive dysfunction by reducing neuronal apoptosis in adult rats exposed to SEV. RES partly exerted a neuroprotective effect through the activation of the SIRT1/RhoA signaling pathway.
Spatial Distribution, Population Structure, and Predatory Impact of Gelatinous Predators on Zooplankton Community in Inshore Waters off Crimean Coast of the Black Sea
Authors: Finenko Galina A.
Published: July 2021

The study reports the data on the distribution and predatory impact of the gelatinous macroplankton on mesozooplankton in the inshore waters of Crimea in April 2016. In the study areas, gelatinous macroplankton comprised Scyphomedusae Aurelia aurita (Linnaeus, 1758) and three ctenophore species (Mnemiopsis leidyi A. Agassiz, 1865, Beroe ovata Bruguire, 1789, and Pleurobrachia pileus (O. F. Müller, 1776). The biomass of A. aurita dominated everywhere and varied from ~ 62 to 330 g·m‑2 in different areas. The largest A. aurita biomass was observed in the South Coast of Crimea and the smallest in Karkinitsky Bay, where the number of jellyfish was high, suggesting the predominance of small individuals in the population. The size structure of A. aurita population differed by region: the proportion of large animals increased from the West to the East. The abundance and biomass of M. leidyi were rather low: 0.33–1.45 ind·m‑2 and 1–51.7 g·m‑2, respectively (the exception was the position in the Kerch Strait, where M. leidyi abundance reached 2 ind. m‑2 and biomass 126.3 g·m‑2); that species occurred only at 33–45 % of the stations (the exception was Karkinitsky Bay – 17 %), with the maximum values in the South Coast of Crimea. Large, 55–70-mm, adult individuals predominated. P. pileus biomass was lower than the biomass of A. aurita and M. leidyi in all areas, but its abundance was much higher. The daily rations of A. aurita varied widely both in the entire area and from one region to another. The daily ration values correlated with the carbon content in A. aurita body. The predation pressure of A. aurita on zooplankton in the inshore waters of Crimea was very low and did not result in a crucial decrease in mesozooplankton abundance. The effect of M. leidyi, even with its low abundance and biomass, was much stronger
Estimating the Mean of Heavy-tailed Distribution under Random Truncation
Authors: Khanssa Ben Dahmane
Published: July 2021

Inspired by L.Peng’s work on estimating the mean of heavy-tailed distribution in the case of completed data. we propose an alternative estimator and study its asymptotic normality when it comes to the right truncated random variable. A simulation study is executed to evaluate the finite sample behavior on the proposed estimator
A Note on the Conjugacy Between Two Critical Circle Maps
Authors: Safarov Utkir A.
Published: July 2021

We study a conjugacy between two critical circle homeomorphisms with irrational rotation number. Let fi, i = 1, 2 be a C3 circle homeomorphisms with critical point x(i) cr of the order 2mi + 1. We prove that if 2m1 + 1 ̸= 2m2 + 1, then conjugating between f1 and f2 is a singular function. Keywords: circle homeomorphism, critical point, conjugating map, rotation number, singular function
Thermodynamic and Chemical Analysis of Water-Coal Fuel Ignition and Combustion in Adiabatic Combustion Chamber
Authors: Karpenok Viktor I. , Murko Vasily I. , Mastikhina Vera P. , Loboda Yulia A.
Published: July 2021

The article presents results of improvement of physicochemical model of coal-water fuel ignition and combustion processes, taking into account ash content and release of volatile substances of solid phase. In this case, model of ignition and combustion of two systems of atomized coal-water fuel: drops and pure coal particles is taken as a basis. As a result of the analysis, the influence of ash content of coal-water fuel on output of combustible gases and content of water vapor in furnace atmosphere was established. Based on comparison of the diffusion coefficients of gases and the calculated values of equilibrium constants of reaction in combustion zone, conclusion has been of the leading role of water vapor oxidation of carbon in vortex adiabatic furnace. Performed numerical calculations have shown that combustion process of the above inhomogeneous systems (droplets and particles) in an adiabatic furnace within a short time becomes identical. Concentrations of volatile substances, oxygen (O2) and carbon dioxide (CO2) in various sections of the furnace have been established
Research of Operation of Predictive Controllers of Distributed Generation Plant in Power Supply System with Energy Storage
Authors: Bulatov Yuri N. , Kryukov Andrey V. , Suslov Konstantin V.
Published: July 2021

The article discusses the power supply system of an industrial enterprise, which included a turbine generator plant operating on the basis of a synchronous generator equipped with predictive voltage and rotor speed controllers, as well as a high-power electric energy storage device. A description of the models of this plant, predictive controllers and energy storage, as well as the results of modeling when the system goes into an isolated mode of operation are given. Simulation was performed in MATLAB environment using Simulink and SimPowerSystems packages. The purpose of the work was to study the behavior of the proposed predictive controllers during the transition of the power supply system to the island (isolated) mode. Based on the results of computer simulation, it was concluded that the use of predictive controllers improves the damping properties of the system. The use of an energy storage device that is automatically connected to the network when the voltage drops, allows to reduce the overvoltage at the terminals of the generator during its unloading, as well as to reduce the required mechanical power on the turbine shaft in comparison with a permanently connected device. Predictive controllers can be recommended to increase the stability of distributed generation plants when switching to an isolated mode. It is advisable to conduct further research in the direction of creating algorithms for coordinated operation of controllers
Efficiency Criteria for Thermal Insulation Structures of Glass Furnaces
Authors: Beknazaryan David V. , Kanewets Georgij E. , Strogonov Konstantin V.
Published: July 2021

The optimal operation of high temperature reactors such as glass furnaces requires many factors to be considered. These are, for example, the duration of the campaign, operating costs, heat losses, trouble-free operation of units and many others, presented in the article. The aim of this study is to synthesize an efficiency criterion for optimizing the heat-insulating construction of a glass-melting furnace (HICGF), as well as obtaining the optimal values of the efficiency criterion for HICGF, which for the furnace under study are about 3.8 billion rubles. In the course of the study, the phenomenological heuristic-evolutionary optimization method by G. E. Kanevets (PHEOM.GEK), which has a number of advantages over other evolutionary methods. As the main generalizing criterion, taking into account the most significant production (volume, cost of the produced glass mass) and financial (costs for the construction and operation of the HICGF, the monetary equivalent of heat losses) indicators, the maximum gross income for the furnace campaign was adopted, which differs from prototypes in that it allows to take into account most fully the peculiarities of the work of the insulated side fence of the glass furnace. Using the software complex created on the basis of PHEOM.GEK complex systems for the side fence of a glass-melting furnace, the optimal set (sequence of location and thickness) of thermal insulation materials HICGF was determined, which allow maximizing the furnace campaign with minimal heat losses. The reliability of the data obtained is achieved by the correct use of the theory of heat and mass transfer and PHEOM.GEK. An efficiency criterion is proposed, which, by solving an optimization problem, made it possible to determine the optimal HICGF. The solution of the optimization problem in conjunction with the calculation of the duration of the furnace campaign makes it possible to form recommendations for the development of optimal HICGFs in the construction of new and cold repair of existing glass furnaces by specialized institutes and industrial companies
Getiri Eğrisi Makroekonomi Bağlantısı: Türkiye Örneği
Authors: TUZUN Osman , KAHYAOĞLU Hakan
Published: July 2021

Bu çalışmanın amacı Türkiye’de faiz oranlarının vade yapısına etki eden makroekonomik değişkenlerin belirlenmesidir. Faiz oranlarının vade yapısı getiri eğrisi aracılığıyla analiz edilmektedir. Getiri eğrisinin tahmin edilmesinin ardından, Türkiye’de faiz oranlarının vade yapısının hangi makroekonomik değişkenler tarafından belirlendiği analiz edilmektedir. Söz konusu analiz, doğrusal olmayan bir yöntem olan; Eşik VAR (Threshold VAR-TVAR) tekniği ile gerçekleştirilmektedir. Çalışmanın bulgularına göre getiri eğrisinin seviye parametresi enflasyon değişkeni tarafından, eğim parametresi ise çıktı açığı tarafından belirlenmektedir. Eğrilik 1 ve eğrilik 2 parametrelerinin ortak belirleyicileri CDS değişkenidir. Ayrıca eğrilik 1 değişkeni çıktı açığından, eğrilik 2 değişkeni ise enflasyon değişkeninden etkilenmektedir. Bununla birlikte üst rejimde getiri eğrisi-makroekonomi ilişkisi zayıflamaktadır. Rejimler arasındaki farklılaşma Türkiye’de faiz oranlarının vade yapısının makroekonomik değişkenlerden asimetrik olarak etkilendiğini göstermektedir.
Ekonomik Politika Belirsizliği ve Portföy Yatırımları İlişkisinin Panel ARDL Analizi
Authors: KÜÇÜKSAKARYA Sevilay
Published: July 2021

Çalışmada 23 ülke için net portföy yatırımlarıyla ülkelerin ulusal ekonomik politika belirsizlikleri ve global ekonomik politika belirsizliği arasındaki kısa ve uzun dönem ilişkileri 2005–2019 dönemi yıllık verileri kullanılarak analiz edilmiştir. Çalışmada öncelikle ülkeler arasında kesit bağımlılığı test edilmiştir. Kesit bağımlılığı bulunduğu için ikinci nesil panel birim kök testi olan CIPS yardımıyla değişkenlerin bütünleşme dereceleri belirlenmiştir. Panel ARDL sonuçları değişkenler arasında bir eşbütünleşme ilişkisini gösterirken, aynı zamanda ülkelerin ekonomik politika belirsizliklerinin hem cari fiyatlarla hem de satın alma gücü paritesi temelli ölçülen global ekonomik politika belirsizliklerinin net portföy yatırımları üzerinde farklılaşan etkilerini göstermiştir. Kısa dönem anlamlı etkiler yanında panel için anlamlı ama nispeten düşük uyum hızı bulunmuştur. Kısa dönem sonuçlarına göre portföy yatırımlarına konu olmayan ülkeler için bir eşbütünleşme ilişkisi bulunamazken uyum hızları da ülkelere göre ciddi farklılıklar göstermiştir. Bu sonuçlar bize uluslararası portföy yatırımcılarının, politika yapıcılarının ve piyasa profesyonellerinin portföy yatırımlarıyla ilgili kararlarında politika belirsizliklerinin de dikkate alması gerektiğini göstermektedir.
Comparative Performance of Three Methods to Classify Smokers Data
Authors: Al-Najafi Amenah
Published: July 2021

Since recently tobacco epidemic is one of the most important health hazards that face Iraqi individuals and communities in spite of the large information supported by the Iraqi Ministry of Health and the available statistics that link smoking with many life threatening illnesses to human. Tobacco consumption rates are increasing nowadays among university students. Iraqi Ministry of Health confirmed the need to take a serious action to support research that examines the tobacco epidemic among students, in an attempt to find the causes and the appropriate solutions.It is, therefore, our main objective is to investigate the student smokers from the University of Kufa in Iraq. The research attempted to study the behaviour of smokers using questionnaires. The performance of Latent Classes (LC) is evaluated by attempting to classify the student smokers and then compared it to two clustering methods namely K-means and Two-Step method.
The impact of management on the behavior of an isolated logistics population
Authors: Kolianova T. V.
Published: July 2021

The article considers the isolated population described by the logistic equation and studies the influence of management on the change of its number. Depending on the value of the control parameter, there are three different cases of behavior of an isolated population. In the first case, when the quota is equal to the corresponding value, depending on the initial value, the population either goes to a stationary value, or dies out. In the second case, when the quota does not exceed the established value, depending on the initial population size, the population either goes to the largest stationary point, or dies out. And in the third case, when the quota exceeds the established value, regardless of the initial population size, the population dies out. Stationary points for stability in all three cases are studied and graphs of population behavior depending on different initial conditions are presented.
Bernoulli multi-armed bandit problem under delayed feedback
Authors: Dzhoha A. S.
Published: July 2021

Online learning under delayed feedback has been recently gaining increasing attention. Learning with delays is more natural in most practical applications since the feedback from the environment is not immediate. For example, the response to a drug in clinical trials could take a while. In this paper, we study the multi-armed bandit problem with Bernoulli distribution in the environment with delays by evaluating the Explore-First algorithm. We obtain the upper bounds of the algorithm, the theoretical results are applied to develop the software framework for conducting numerical experiments.