bluuebunny/crossref_metadata_2025 huggingface dataset:
VERTICAL PROFILE OF DENSITY IN A VAN DER WAALS ATMOSPHERE IN NATAL CITY
Authors: Silva Isamara de Mendonça , Silva Douglas do Nascimento , Medeiros Deusdedit Monteiro
Published: January 2020

The van der Waals state equation for atmosphere is determined from the critical temperature and critical pressure of the air gases. The meteorological radiosonde measures atmospheric pressure, temperature, and other meteorological variables, at several altitude levels. Therefore, the diurnal and nocturnal vertical profiles of the monthly average density of the atmosphere were constructed, considering the atmospheric system as an ideal gas and also as a van der Waals gas. For this purpose, the radiosonde data of the atmosphere of the metropolitan region of Natal-RN, Brazil, from 2010 to 2017, with altitude ranging from 50m to 10km.
Analysis of Silicon Carbide Polymorphs Substrates Effect on Performances of AlGaN/GaN Double Quantum Well HEMTs
Authors: Sabaghi Masoud
Published: January 2020

AlGaN/GaN high electron mobility transistors (HEMTs) have established terrific features in the high-power and high-frequency applications of microwave device. In this paper, the impact of silicon carbide polymorphs substrates including 6H-SiC, 3C-SiC and 4H-SiC on the performances of AlGaN/GaN double quantum well HEMTs (DQW-HEMTs) are analyzed and investigated. The results show that the devices with 4H-SiC and 6H-SiC substrates exhibit a higher transconductance of about 192 ms/mm at VDS = 15 V and a lower minimum noise figure (NFmin) of 0.48 and 0.42 dB at 10 GHz than those of devices with 3C-SiC, respectively. Whereas, DC-HEMT with 3C-SiC substrate has a transconductance of about 180 ms/mm at VDS = 15 V and a minimum noise figure of 3.01 dB at 10 GHz. On the other hands, the DC-HEMT with 3C-SiC substrate has lower drain gate capacitance (Cdg) and higher cut-off frequency (ft) than DC-HEMT with 4H-SiC and 6H-SiC substrates. The results demonstrate that AlGaN/GaN DH-HEMTs 4H-SiC and 6H-SiC substrates are promising devices for future high-power and high-frequency electron device applications.
Entre a subordinação e a agência: uma análise da geossociabilidade feminina a partir do filme Uma linda mulher
Authors: Zampier Ronan Leandro , Farias Rita de Cássia Pereira
Published: January 2020

O presente artigo traz uma reflexão sobre a geossociabilidade e os processos de resistência e agência da mulher na sociedade contemporânea, a partir de uma análise ancorada na comédia romântica norte-americana da década de 1990, Uma linda mulher, como referência empírica do pensamento coletivo, como propõe Geertz (1976) e Híkiji (1998). Considerando as interseções Gênero, Classe e Identidade, os resultados revelam que elementos do dispositivo sociocultural, como o sistema de moda, os processos de estigmatização identitária, objetificação feminina e o imaginário romântico, a princípio, parecem contribuir para a construção de um lugar social desprivilegiado para as mulheres, tanto na obra de ficção, quanto nas práticas cotidianas. Entretanto, como evidenciado na obra, a oposição da personagem feminina às diversas formas de abusos do poder fez emergir a sua potência e a sua participação como sujeito nas relações de poder, demonstrando resistência e agência aos limites impostos pela ordem social, ampliando a sua geossociabilidade, ressignificando práticas socioculturais discriminatórias e a sua vida.
QUALITY MANAGEMENT DUAL TEACHING: A SPECIFIC CASE IN A PRIVATE MEXICAN UNIVERSITY
Authors: Cuautle-Gutiérrez Luis , Juárez-Peñuela Jesús
Published: January 2020

La educación superior en México ha recibido la misma mentalidad que en los últimos 30 años en un sistema que ha retrocedido. Demanda de profesionales de la industria con las habilidades para crear valor para sus empresas. Por lo tanto, la Ingeniería Industrial de la Facultad de la Universidad Privada de la Universidad ha desarrollado el sistema de educación dual (DTS). En el caso de las empresas, deposite el estudio de Gestión de Calidad Seleccionado FUE Enseña que une a los estudiantes de ingeniería. (En inglés), en el que se analizan las características de los sistemas de gestión de calidad y la calidad de los productos. Como resultado, los alumnos que ocupan al menos 240 diferirán de las clases de tiempo en los proyectos. Por tu partePuede utilizar el método de aprendizaje para la certificación a propósito. Esta ETS se ha realizado durante cuatro años y los resultados de la demostración que se pueden reproducir en este programa específico en otras áreas de conocimiento en los programas de ingeniería.
La Expresión Corporal como forma de comunicación esencial
Authors: Carnero-Sierra Susana , Pérez de Amézaga Ana María
Published: January 2020

La disciplina denominada Expresión Corporal comprende un campo multidisciplinar en el que confluye el terreno educativo y comunicativo, pero también el artístico y terapéutico. El acto de comunicar con el cuerpo supone un hecho indesligable en la ontogenia del individuo, hecho tradicionalmente estudiado en el ámbito académico por el campo de la comunicación no verbal. En este trabajo se realiza una propuesta para reformular el enfoque de investigación de la también denominada Técnica y Expresión de Movimiento, definiendo los orígenes artísticos de la misma y situándola como disciplina de características independientes respecto de la danza y la comunicación no verbal. De esta forma, se contemplan nuevas posibilidades en su estudio, conectando su origen artístico con sus potencialidades en el terreno comunicativo, educativo y socio-terapéutico.
FORMATO DA INFORMAÇÃO NO CÁLCULO DE PROBABILIDADES POR FUTUROS PROFESSORES DOS PRIMEIROS ANOS
Authors: Fernandes José António , Gonçalves Gabriela , Barros Paula Maria
Published: January 2020

Neste artigo estuda-se o cálculo de probabilidades realizado por futuros professores dos primeiros anos escolares, bem como o formato da informação a que eles recorrem na determinação dessas probabilidades. Participaram no estudo 50 estudantes, futuros professores dos primeiros anos escolares, que na altura se encontravam a frequentar o segundo ano do curso de Licenciatura em Educação Básica numa universidade do norte de Portugal. Aos estudantes foram aplicadas várias tarefas de Probabilidades e Estatística, num contexto de avaliação formal, sendo aqui estudada apenas uma dessas tarefas, a qual envolve vários tipos de probabilidade (probabilidade simples, conjunta e condicionada) e dois formatos de informação (frequências absolutas e frequências relativas). Em termos dos principais resultados obtidos, salienta-se que os futuros professores revelaram um conhecimento limitado de probabilidades e uma preferência clara pelo uso das frequências absolutas no cálculo dessas probabilidades.
New Industry Standards to Increase the Reliability of Drilling Operations
Authors: Amorim Jr. Dalmo S. , Santos Otto Luiz Alcantara , De Azevedo Ricardo Cabral
Published: January 2020

Design engineers select drilling bits based on their professional experience and knowledge about the area of the upcoming wells. Due to the absence of widely accepted algorithms for this task, diverse performance projections can come out if prepared by different persons. By selecting bits to withstand ranges of parameters similar to the used in offset wells, less failures and longer runs can be expected. In deeper wells, a slow increase in the modes of string harmonics makes well planning complex, becoming crucial for the endurance of drilling bits to avoid resonance. Two new standards are proposed to the Oil & Gas industry in this article, created to make well planning more effective and to increase safety in selecting drilling parameters at the rig. An environment of higher drilling efficiency will result in more reliable operations and lower operational costs.
A EXTENSÃO ACADÊMICA COMO FERRAMENTA PARA APRENDIZAGEM NO ENSINO SUPERIOR
Authors: Farias Glorgia Barbosa de Lima de , Rodrigues Roberto Senna , Cardoso Sérgio Ricardo Pereira
Published: January 2020

A extensão acadêmica no Brasil é apresentada atualmente como um instrumento utilizado pelas Instituições de Ensino Superior visando a realização do seu compromisso social, em que há troca de conhecimento com a sociedade, ou seja, um diálogo de saberes. Diante disso, o objetivo deste artigo é analisar a relação entre os projetos de extensão acadêmica e a formação profissional dos alunos do curso superior de tecnologia em gestão ambiental. Tendo como perspectiva a análise de conteúdo, foram realizadas, além de pesquisas bibliográficas e entrevistas; após a coleta de dados, implementou-se a análise de conteúdo propriamente dita a fim de identificar e discutir os pontos mais relevantes entre as atividades de extensão e o processo de ensino e aprendizagem no referido curso.. Como desfecho desta pesquisa, destaca-se que, mesmo com limitações, a extensão acadêmica contribuiu para a formação do aluno, pois é notório uma maior integração entre os saberes da academia e os saberes advindos das comunidades parceiras, o que proporcionou aos sujeitos envolvidos a formação não apenas técnica do profissional, mas de um ser humano por inteiro e suas mais diversas dimensões (social, política, econômica, humana, entre outras).
DIAGNÓSTICO AMBIENTAL DE COMUNIDADES RURAIS DO SEMIÁRIDO POTIGUAR SOB A ÓTICA DA MITIGAÇÃO DE EFEITOS DA DESERTIFICAÇÃO
Authors: SILVA Elisângelo Fernandes da , REIS Leci Martins Menezes
Published: January 2020

O objetivo geral deste estudo foi o de elaborar o diagnóstico ambiental de comunidades rurais de Currais Novos, Recanto e Zangarelhas, localizadas na Microbacia do Rio Cobra, município de Jardim do Seridó, do Semiárido Potiguar sob a ótica da mitigação de efeitos da desertificação, no período de 2016 a 2017. A metodologia deu-se por meio de ida a campo para coleta de amostras de água superficial e subterrânea; de solo e realização de entrevistas com moradores e empresários do setor ceramista das comunidades, além disso, foi realizado o mapeamento da área por imagem de satélite. O diagnóstico identificou que as atividades humanas desenvolvidas nas três comunidades aliadas às condições climáticas de semiaridez contribuíram para potencializar o processo de desertificação presente na área, uma vez que a retirada da cobertura vegetal nativa seguido do processo de queima abriu espaço para o surgimento de vários problemas como erosões, assoreamento dos corpos de água, perda da capacidade produtiva do solo e desaparecimento de espécies da fauna local. Aliado a esses fatores, somam-se a redução da disponibilidade hídrica, a contaminação das águas superficiais e subterrâneas, a compactação e a salinização do solo e, por fim, a redução da qualidade de vida da população local. Conclui-se, mediante a esse cenário, que há necessidade da elaboração de ações sustentáveis que leve em consideração todas essas fragilidades, apontadas pelo diagnóstico ambiental, para que uma nova realidade seja construída norteando melhoria de vida mediante a convivência do homem com os efeitos da desertificação.
ESPACIALIZAÇÃO DAS MANCHAS DE ÓLEO E GRAXA NA ZONA PORTUÁRIA DE NATAL-RN ATRAVÉS DE TÉCNICAS DE INTERPOLAÇÃO IDW E KRIGAGEM
Authors: Souza Jairo Rodrigues , Cavalcanti Neto Mario Tavares
Published: January 2020

As técnicas de interpolação estão sendo cada vez mais utilizadas na área das Geociências, principalmente para a espacialização de dados de plumas de contaminação no meio ambiente. Neste trabalho, tem como objetivo espacializar as manchas de óleo e graxa na zona portuária de Natal-RN através de técnicas de interpolação IDW e krigagem entre os meses de outubro e novembro de 2016. Para tanto, foram recolhidas 30 amostras d’água ao longo da zona portuária de Natal-RN no mês de outubro e mais trinta amostras no mês de novembro, totalizando em sessenta amostras d’água analisadas. Com os valores do teor de óleo e graxa, procedeu-se a espacialização desses contaminantes através de técnicas de geoprocessamento. Verificou-se, então, que as regiões mais afetadas estavam a sul-sudeste e norte-noroeste da área de estudo e que o método de interpolação por Krigagem é mais eficiente que o IDW, uma vez que este apresentou fortes interferências do efeito “bulls eyes” ao redor de cada ponto de coleta, enquanto aquele, através da checagem do “cross validation”, apresentou os Erros Médio Padronizado, Médio Quadrático, Padrão Médio e Quadrático Médio Padronizado mais compatíveis.
TRATAMENTO DE EFLUENTES E PRODUÇÃO DE ÁGUA DE REÚSO PARA FINS AGRÍCOLAS
Authors: Torres Dayana Melo
Published: January 2020

A agricultura é o setor que mais consome água no planeta, cerca de 70% da água potável, o que aponta para a necessidade de buscar meios eficazes para a diminuição desse uso. O efluente mais adequado para a aplicação na agricultura é o esgoto doméstico, devido à sua composição e aos seus valores nutricionais. Desse modo, o referido trabalho tem como objetivo avaliar o tratamento de efluentes e a produção de água de reúso para fins agrícolas no campus do IFRN de São Paulo do Potengi/RN, Brasil. Para avaliação da qualidade do tratamento de esgotos, foram realizadas coletas dos esgotos bruto e tratado em uma das Estações de Tratamento de Esgoto (ETEs) do referido campus, entre os meses de julho e dezembro de 2018. Para isso, foram analisadas as propriedades físico-químicas e microbiológicas do efluente por meio de parâmetros, como: pH, temperatura, condutividade elétrica, alcalinidade total, sólidos suspensos totais, DQO, nitrogênio amoniacal, nitrogênio orgânico, NTK, sódio, cálcio, magnésio e coliformes termotolerantes, todos segundo APHA et al. (2017). Espécimes de milho (Zea mays) foram irrigadas com efluente tratado em diferentes dosagens na horta do laboratório do campus e obteve-se resultados favoráveis para a utilização do efluente na irrigação dessa cultura.
Uncommon Word Order of Yoda in Star Wars Movie Series: A Syntactic Analysis
Authors: Yuliyana Yuliyana , Bram Barli
Published: January 2020

This paper analyzes Yoda’s syntax order to discover the word order which occurs in his speeches and the factors affecting his preferred syntax. Data were collected from   Yoda’s utterances in George Lucas’ Star Wars saga. Yoda, who speaks English, expresses his thoughts in an unusual structure which might not be recognized by the existing rules of syntax. Instead of speaking in the traditional Subject-Verb-Object syntax, Yoda speaks in Object-Subject-Verb and Verb-Object-Subject syntax. This study employs content analysis, diving into seven Star Wars movies from the Saga. Out of 169 sentences Yoda uttered, the researchers discovered three factors affecting his preference to use the unusual syntax, namely Yoda’s origin, personality and traits, and power and abilities.
Equivalent state theory for mixtures of sand with non-plastic fines: a DEM investigation
Authors: Barnett Nick , Rahman Md. Mizanur , Karim Md. Rajibul , Nguyen H. B. Khoi , Carraro J. Antonio H.
Published: January 2020

The discrete-element method (DEM) was used to simulate constant-volume (undrained) triaxial compression tests for coarse particles (sand) mixed with non-plastic fines. Simulations were performed on granular mixtures with a range of fines contents (fc) – namely, 0, 0·05, 0·10 and 0·20. The critical state and micromechanical responses of these mixtures were evaluated. The influence of fc on sand behaviour was captured when fc < fthre, where fthre represents a threshold fines content, which corresponds to a transition from a fines-in-sand soil matrix to a sand-in-fines soil matrix. The DEM was utilised to assess the micromechanical participation of fines within the sand skeleton (matrix). Such evaluations led to assessing the performance of the equivalent granular void ratio (e*), the equivalent granular state parameter (ψ*) and ultimately their inherent parameter b, which represents the proportion of fines actively participating in the sand skeleton structure. It was observed that through capturing the stress partition of contact types within granular mixtures, a reasonable approximation of the active proportion of contacts within the sand matrix could be obtained. This led to a new DEM interpretation of the b parameter. The study therefore evaluated the concept and applicability of the equivalent state theory for sand–fines mixtures.
Reaction-degree-based multi-scale predictions for the effective properties of ultra-high-performance concrete
Authors: Chen Qing , Wang Hui , Jiang Zhengwu , Zhu Hehua , Ju Jiann-wen , Yan Zhiguo
Published: January 2020

Through upscaling from the hydration products to a macroscopic composite, a multi-scale framework is proposed to predict the effective properties of ultra-high-performance concrete (UHPC) with different reaction degrees. In this framework, the hydration of Portland cement and the pozzolanic reaction of silica fume (SF) are taken into consideration. Different length scale representative volume elements are used to describe the material's hierarchical microstructures. The constituents’ volume fractions at different length scales are analytically calculated by the reaction degrees of Portland cement and SF. Multi-scale and multi-level homogenisation schemes are adopted to quantitatively relate the microstructures to the macroscopic properties. The numerical results showed that estimations of existing hydration models can be obtained as special cases of the proposed model. By comparison with experimental data and results estimated in previous work, it was found that the proposed multi-scaling approaches are capable of predicting the macroscopic behaviour of UHPC with different reaction degrees.
Preparation and characterisations of magnetic nanofluid of zinc ferrite for hyperthermia
Authors: Patade Supriya R , Andhare Deepali D , Somvanshi Sandeep B , Kharat Prashant B , More Santosh D , Jadhav Kamalakar M
Published: January 2020

Zinc ferrite (ZnFe2O4) nanoparticles were synthesised by using solution gelation and the self-combustion technique. The resulting zinc ferrite nanoparticles were structurally analysed by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and vibrating sample magnetometry for structural, morphological and magnetic properties, respectively. The XRD pattern shows that the prepared sample has a spinel monophasic cubic structure, and the broadening of X-ray peaks indicates the nanocrystalline size of the particles to be on the order of 13 nm. FE-SEM analysis shows spherical-type grains and confirms the nanocrystalline nature with an average grain size of 24 nm. The energy-dispersive X-ray analysis spectrum indicates the purity of the sample and the presence of the desired ions in good proportions. The magnetisation–field strength (M–H) hysteresis loop shows enhanced magnetisation with the superparamagnetic nature of zinc ferrite nanoparticles compared with previous literature reports. The saturation magnetisation value (M s) was estimated to be 23·25 emu/g. The obtained nanoparticles of zinc ferrite were used to prepare nanofluids with water as a base fluid (2 mg/ml concentration). Magnetic hyperthermia studies were carried out using an induction heating system. The induction heating results show that a small amount (2 mg/ml) of zinc ferrite nanoparticles can achieve a 42°C temperature for 258 s at 4·0 kA/m.
Why bother maintaining languages?
Authors: Ong Teresa
Published: January 2020

Language maintenance and language shift are vital subfields in sociolinguistics. In Malaysia, past studies have observed a shift from Chinese dialects to Mandarin Chinese in the language use of many young generation Chinese, which has led to the endangerment of some dialects. This situation draws attention to the role and survival of Chinese dialects in Malaysian society, and thereby creates a need to discuss the reasons for maintaining them. However, this is not merely a question of continuing to speak Chinese dialects. More deeply, we need to have conversations about who we are, where our ancestors originated from, and how we can make Chinese dialects more worthwhile for maintenance. This article seeks to elicit support for the language maintenance of small language groups across the globe.
How ETFs Amplify the Global Financial Cycle in Emerging Markets
Authors: Converse Nathan , Levy Yeyati Eduardo , Williams Tomas
Published: January 2020

This paper examines how the growth of exchange-traded funds (ETFs) has affected the sensitivity of international capital flows to global financial conditions. Using data on individual emerging market funds worldwide, we employ a novel identification strategy that controls for unobservable time-varying economic conditions at the investment destination. We find that the sensitivity of flows to global financial conditions for equity (bond) ETFs is 2.5 (2.25) times higher than for equity (bond) mutual funds. We then show that our findings have macroeconomic implications. In countries where ETFs hold a larger share of the equity market, total cross-border equity flows and returns are significantly more sensitive to global financial conditions. Our results imply that the increasing role of ETFs as a channel for international capital flows has amplified the global financial cycle in emerging markets.
Promoting Constitutional Democracy: Regulating Political Parties in the Central African Republic and Senegal
Authors: Vohito Anyanwu Sonia
Published: January 2020

Constitutions and other legal frameworks are expected to ensure the protection of the fundamental and collective rights of citizens. In this respect, the regulation of political parties is a global phenomenon, which symbolises multi-party democracy, the rule of law and good governance. This article examines the phenomenon of the constitutional and legal regulation of political parties in the Central African Republic (hereafter CAR) and Senegal, two francophone countries with different trajectories and experiences of multi-party democracy. It identifies possible challenges and shortcomings of the regulation of political parties in the two countries, especially in relation to the actual implementation of the existing national frameworks. The article attempts to suggest possible frameworks for an effective implementation of the constitutional and legal rights of political parties, including the constitutionalisation of the enforcement mechanisms, which would undeniably protect the position of political parties in constitutional democracies. In conclusion, the article highlights the role of an independent judiciary in the promotion and protection of the constitutional and legal status of all political parties in the CAR and Senegal.
De la alfabetización académica a las literacidades académicas: ¿teorías y métodos en disputa?
Authors: Franco Alfonso Vargas
Published: January 2020

Este artículo de reflexión se propone indagar en las teorías y métodos de dos enfoques representativos en torno a la escritura académica en la universidad colombiana: Alfabetización Académica y Academic Literacies (Nuevos Estudios de Escritura Académica), cuyas fronteras a veces no resultan tan claras ni transparentes, a pesar de sus profundas diferencias epistemológicas. El primero de estos, enraizado profundamente en los movimientos anglosajones de la escritura a través del currículo y la escritura en las disciplinas, está respaldado por un fuerte componente cognitivo; y el segundo, inspirado en los Nuevos Estudios de Literacidad (NEL), la teoría crítica, el análisis crítico del discurso y la pedagogía crítica, así como en las epistemologías postcoloniales y decoloniales, tiene una marcada inspiración en los enfoques sociales y culturales y críticos sobre la cultura escrita. En la primera parte del texto se presentan los presupuestos epistemológicos de estos dos enfoques, y en la segunda parte se analizan sus implicaciones para la alfabetización académica en la educación superior. Finalmente, se enfatiza que, a pesar de sus profundas diferencias pueden establecerse sinergias entre estos.
Astronomía para la educación: “de Macondo al cielo, del cielo a Macondo”
Authors: Villanueva Silva Johanna Alexandra , Lozano Guillermo Alfonso
Published: January 2020

El presente reporte expone una experiencia en cuanto al trabajo interdisciplinar e interinstitucional que se puede lograr a partir de la divulgación y el estudio de la Astronomía. La experiencia hace parte de las apuestas de investigación formativa del semillero interdisciplinar Paralajes de la Facultad Ciencias de la Educación de la Universidad la Gran Colombia, en el que participan estudiantes de los diferentes programas académicos de licenciatura, quienes en cooperación con un grupo de asesores del planetario de Bogotá, pretenden dar a conocer cómo el análisis y reflexión sobre una de las actividades que comúnmente se desarrolla en el planetario, dio pie a la elaboración de una secuencia didáctica, con la cual se evidenció a partir de un método descriptivo cualitativo de investigación, el aprendizaje significativo tanto de conceptos básicos de Astronomía, como de conceptos matemáticos asociados a su estudio. Lo anterior a partir de una minuciosa revisión y posterior simulación de los diversos acontecimientos astronómicos que cubrieron la bóveda celeste en el desarrollo de la historia de Macondo y la familia Buendía, en la novela Cien años de soledad, de Gabriel García Márquez. El pilotaje de la secuencia se llevó a cabo en la Institución Educativa Distrital Luis Eduardo Mora Osejo, ubicada en la localidad quinta de Usme, con un grupo focal de estudiantes de grados sexto y décimo en la clase de matemáticas. De acuerdo con los resultados obtenidos este tipo de propuestas no solo cautiva el interés de estudiantes por querer aprender matemáticas y otras ciencias básicas, sino en sí sobre el universo que les rodea; así mismo se reconoció el potencial que tiene el uso de programas como Stellarium y GeoGebra, tanto en la investigación formativa, como en el proceso de enseñanza y aprendizaje, en este caso en la didáctica de la Astronomía y en la didáctica de las matemáticas, generando reflexiones interesantes en cuanto a innovación pedagógica, que ameritan ser estudiadas y potencializadas.
Valores democráticos en escenarios de aprendizaje de las matemáticas: conexiones entre la diversidad y la cultura juvenil
Authors: García Oliveros Gloria , Serrato Eileen Navarrete , Samboní Trujillo Tatiana
Published: January 2020

En este artículo se explora y desarrolla la relación entre educación matemática, democracia y diversidad, en las posibilidades que crea la descentralización del currículo de matemáticas al posibilitar una cultura en la clase donde la diferencia cultural es un elemento constitutivo basada en el reconocimiento de múltiples maneras de legitimar las relaciones con las matemáticas de los adolescentes. Se introducen los escenarios de aprendizaje como marco que garantiza que en las actividades en el aula los estudiantes construyen diferentes grupos y comparten diferentes culturas alrededor de una variedad de habilidades matemáticas mientras el rol que cada estudiante juega en esos grupos está relacionado con la construcción de identidad a través de la participación en la actividad. Los datos provienen de dos tesis de maestría en Docencia de las Matemáticas, realizadas entre el 2013 y 2015 en la Universidad Pedagógica Nacional (Colombia). La primera tesis presenta el escenario de aprendizaje “No le des la espalda a tu espalda” y resalta que es posible en la clase de matemáticas acercarse a acciones colectivas entre los estudiantes. La segunda tesis presenta el escenario de aprendizaje “¿Cuánta agua gastamos?”. Y muestra las posibilidades y limitaciones en el montaje de escenarios de aprendizaje para abordar y desarrollar acciones colectivas y comprometerse en procesos de comunicación deliberativa. A modo de cierre presentamos algunos cuestionamientos sobre los dispositivos de clausura y de control de la diversidad creados por el campo específico del conocimiento matemático como el ideal homogeneizador e inclusivo de la educación matemática. Analizamos la potencialidad de un ensanchamiento de prácticas culturales como constitución de espacios para hacer visible la diversidad cultural en el aula con un abordaje “indisciplinado” (por fuera de las disciplinas) porque abre las matemáticas escolares en la reducción de brechas entre la cultura juvenil y la cultura de la clase
Enseñanza de la cinética química por medio de simulaciones y aprendizaje activo
Authors: Paredes-Navia Julián Guillermo , Molina-Caballero Manuel Fredy
Published: January 2020

Este artículo de investigación presenta una propuesta de implementación de actividades experimentales y de simulación, utilizando como fundamento los principios de la metodología del aprendizaje activo, para la enseñanza-aprendizaje de los factores que modifican la velocidad de una reacción química. La estrategia se aplica en los grados décimos de la Institución Educativa San Lorenzo (iesl) del municipio de Suaza en el departamento del Huila (Colombia). Para ello se toman dos grupos, uno de los cuales integra el desarrollo de las actividades a través del trabajo práctico y, otro, que lo hace utilizando el simulador de experimentos de cinética química “virtual LabCin”. La propuesta integra la aplicación de un test de ideas previas, el desarrollo de talleres de interacción-demostración y la implementación de la prueba final. Conforme a los resultados, se hace un análisis de confrontación temporal (antes, durante y después), en el cual se determina que la propuesta didáctica no solo permite establecer un impacto positivo y favorable en el rendimiento y adquisición de conocimiento de los conceptos abordados, sino que también proporciona el desarrollo de capacidades intelectuales y procedimentales, que estimulan la proposición, la confrontación, la comunicación y el desarrollo de ideas.
High-Throughput Beta-glucuronidase (GUS) assay for Phaeodactylum tricornutum v1
Authors: Garza Erin , A Bielinski Vincent
Published: January 2020

A high-throughput method for measuring β-glucuronidase (GUS) activity in the diatom Phaeodactylum tricornutum. This protocol has been optimized for 250 μl volumes. For larger volumes see the following protocol dx.doi.org/10.17504/protocols.io.hefb3bn, which this protocol was based off of.
İstihdam Yaratmayan Ekonomik Büyüme: Türkiye İçin Okun Yasası Çerçevesinde Ekonometrik Bir Analiz
Authors: USLU Hüseyin
Published: January 2020

Bu çalışmada, Okun Yasasının Türkiye ekonomisinde geçerliliği; 1923-1971, 1972-2019 ve 1923-2019 dönemleri için analiz edilmiştir. Serilerin durağanlığı Carrion-i-Silvestre vd. (2009) çoklu yapısal kırılmalı birim kök testi ile incelenmiş ve serilerin I(1) oldukları belirlenmiştir. Seriler arasındaki eşbütünleşme ilişkileri de Maki (2012) çoklu yapısal kırılmalı eşbütünleşme testi ile incelenmiş ve seriler arasında eşbütünleşme ilişkisinin olduğu bulunmuştur. Regresyon katsayıları DOLS, FMOLS ve CCR yöntemleriyle tahmin edilmiş ve Okun Yasasının Türkiye ekonomisinde 1923-1971 döneminde güçlü, 1923-2019 döneminde zayıf formda geçerli olduğu, 1972-2019 döneminde ise İstihdam Yaratmayan Ekonomik Büyüme Teorisinin geçerli olduğu tespit edilmiştir. Buna göre 1923-1971 döneminde %5,3’ün üzerindeki her %1 puanlık ekonomik büyüme, işsizlik oranını %0.33 puan, 1923-2019 döneminde ise %4,9’un üzerinde gerçekleşen her %1 puanlık ekonomik büyüme işsizlik oranını %0.03 birim azaltmıştır. 1972-2019 döneminde ise %4,4’ün üzerindeki her %1 puanlık ekonomik büyüme, işsizliği %0.63 puan artırmıştır. Yapılan VECM nedensellik testi sonuçlarına göre; Türkiye ekonomisinde işsizlik oranı ile ekonomik büyüme arasında kısa dönemde herhangi bir nedensellik ilişkisi tespit edilemezken, uzun dönemli nedensellik ilişkileri belirlenmiştir.
"BATTLE FOR TAVRIA": A HISTORICAL REGION IN POLITICS AND IN THE MARKET OF GOODS AND SERVICES
Authors: HOMANYUK Mykola
Published: January 2020

This article deals with the process, and with the main factors and mechanisms contributing to the modification of mental boundaries among people on the South of Ukraine in regard to the definition of what was and is the South Ukrainian’s historical region of Tavria/Tauride. A conclusion is drawn that in the social perception of this historical region has been more and more frequently perceived as divided into two separate ones. The mainland part of the region has beenexpanded and became known as Tavria, while Crimea became known mostly as Tauride. This process of diversification of Tavria/Tauride toponyms coming into the political discourse of both Ukraine and Russian Federation that might allow some political manipulation and even legitimization of aggression.
To Everything There Is a Season
Authors: Boles Frank J.
Published: January 2020

Three ideas, not always juxtaposed to one another in the literature, have had a profound impact on what archivists preserve. The ideas that archivists should create a universal record of human activity, that social justice should inform archival selection decisions, and that archivists hold a unique form of power that can be exercised through appraisal have led some to posit a professional obligation not only to work toward a more equitable future but also toward a moral one. This article argues that these ideas are generally not helpful to archivists. Local autonomy and unique archival missions better define how archivists can best perform their core functions, rather than ideas based on assumptions of universal documentation or social justice, each rooted in a notion of archival power.
Clinical and diagnostic manifestations in women of reproductive age having both hyperthyroidism and hyperandrogenism
Authors: Akhundova N. E.
Published: January 2020

Aim:to study the clinical and diagnostic manifestations of hyperandrogenism (HA) in women with subclinical thyrotoxicosis.

Materials and methods.Sixty three hyperthyroid women with clinical manifestations of HA were examined. Of these, 17 patients (27.0 %) were diagnosed with hyperthyroidism and HA. The control group included 20 practically healthy women of the similar age (20–44 years old) with no signs of HA or other hormonal disorders. All women under observation (patients with thyrotoxicosis and HA syndrome and women from the control group) underwent a thorough clinical examination and were assessed for their hormonal status using biochemical assays. The levels of follicle-stimulating (FSH), luteinizing (LH), thyroid-stimulating (TSH) hormones, prolactin, estradiol (E2), estrone, and total testosterone (Ttotal) were measured as well as the levels of dehydroepiandrosterone- sulfate (DHEA-S), 17-hydroxyprogesterone (17-OHP), free triiodothyronine (T3free), free thyroxin (T4free), sex hormone binding globulin (SHBG), androstenedione, and antimullerian hormone.

Results.Patients with hyperthyroidism and HA had significantly (р < 0.05) higher (than normal) levels of FSH, LH, LH/FSH, estrone, 17-OHP, Ttotal, androstenedione, DHEA-S, T3free , and T4free, as well as lower levels (р < 0,05) of TSH (0,390 ± 0,003 mU/ml), E2 (49.86 ± 4.00 pg/ml), and SHBG (49.65 ± 1.20 nmol/L). A course of pathogenetic therapy that included anti-hyperthyroidism treatment (tyrosol 5–10 mg/day for 3 months) followed by anti-HA treatment (combined oral contraceptives) resulted in significant (р < 0,05) reduction in LH, the LH/FSH ratio, estrone, 17-OHP, T3free, T4free, androstenedione (2.64 ± 0.008 ng/ml), DHEA-S (2.15 ± 0.14 pg/ml), Ttotal (1.32 ± 0.10 ng/ml) and in significant (р < 0,05) increase in E2 (69.46 ± 2.58 pg/ml), SHBG (59.59 ± 2.8 nmol/L), and TSH (1,79 ± 0,16 mU/ml).

Conclusion.Combined pathogenetic therapy reduces the clinical manifestations of hyperthyroidism and HA syndrome, and restores the menstrual and reproductive functions of women.
The randomized study of preventive revascularization of vulnerable coronary artery plaques in patients with stable coronary artery disease
Authors: Kochergin N. A. , Ganyukov V. I.
Published: January 2020

Background. Today, a number of unresolved issues remain regarding vulnerable coronary plaques, one of which is the need for preventive revascularization.Aim. Evaluation of the appropriateness of preventive revascularization of functionally insignificant lesions of the coronary arteries with signs of vulnerability according to the virtual histology of intravascular ultrasound in patients with stable coronary artery disease.Methods. The prospective randomized study includes patients with stable coronary artery disease and isolated intermediate-grade coronary stenosis. The first step in patients is measured fractional flow reserve to confirm the hemodynamic insignificance of stenosis. Then an intravascular ultrasound is performed to verify signs of plaque vulnerability: a thin-cap fibroatheroma and / or minimum lumen area <4 mm2 and/or plaque burden >70%. After that, patients are randomized into two groups: preventive revascularization or optimal medical therapy. After 12 months, patients undergo repeated intravascular ultrasound and end-point analysis.Results. So far, 10 patients have been included in the study (6 in the preventive revascularization group and 4 in the optimal medical therapy group). No endpoints and complications were recorded in both groups in 30-days follow-up.Conclusion. Intravascular imaging methods can identify vulnerable coronary plaques, which allows you to use a personalized approach in determining treatment tactics, one of which can be preventive revascularization.
The impact of environmental community profile on population physical activity
Authors: Maksimov S. A. , Fedorova N. V. , Shapovalova E. B. , Cygankova D. P. , Indukaeva E. V. , Artamonova G. V.
Published: January 2020

Aim. To evaluate the impact of environmental community profile on the physical activity among the residents of Siberia.Methods. A cross-sectional study of 1263 participants aged 35–70 years was performed. All respondents were surveyed to assess their environmental community profile using the Neighborhood Environmental Walkability Scale and physical activity using the International Physical Activity Questionnaire. The estimated binary indicators of physical activity, including driving, cycling, transport and recreational walking, sports, daily brisk walking (over 150 minutes per week). Logistic regression adjusted to the gender, age and socio-economic parameters was used to determine the presence of any associations between the environmental community profile and physical activity. The cluster analysis was used to group the communities by their environmental profile on the high walkability level and low walkability level.Results. Car driving was negatively associated with pedestrian and cycling facilities within the selected communities (OR 0.84; 0.71–0.99). The positive correlation of transport walking with the access to the community facilities (OR = 1.48; 1.17–1.87) and pedestrian and cycling facilities (OR = 1.24; 1.06–1.44) was found. The negative association of transport walking with traffic safety (OR = 0.74; 0.57–0.97) was determined. Recreational walking was positively associated with the access to the community facilities (OR = 1.23; 1.04–1.45), pedestrian and cycling facilities (OR = 1.20; 1.08–1.33), aesthetics (OR = 1.30; 1.11–1.51) and walkability index (OR = 1.45; 1.23–1.87). Brisk walking of more than 150 minutes per week was positively associated with the access to the community facilities (OR = 1.22; 1.02–1.47) and pedestrian and cycling facilities (OR = 1.15; 1.02–1.29).Conclusion. The impact of the environmental community profile on the transport physical was considered as a positive and was consistent with the results of other similar studies. However, some associations require further in-depth analysis.
Intensification of lipid-lowering therapy in patients with acute coronary syndrome
Authors: Fedorova N. V. , Sedykh D. Yu. , Kashtalap V. V. , Chesnokova L. Yu. , Gruzdeva O. V. , Barbarash O. L.
Published: January 2020

Lipid metabolism disorders play a key role in determining cardiovascular risk. The level of low-density lipoprotein cholesterol is a significant factor in the pathophysiology of atherosclerosis and an indicator, the assessment of which reduces the risk of cardiovascular events. The prevalence of acute coronary syndrome in Russia remains at a high level. To date, the successful implementation and implementation of standards for the management of acute coronary syndrome has significantly reduced hospital mortality rates, however, secondary prevention issues remain relevant. Despite a wide range of lipid-lowering drugs, the use of which at maximum doses in acute coronary syndrome does not allow reaching the target levels of the lipid spectrum, the risk of developing repeated cardiovascular events remains high. Recently, a promising direction is the use of type 9 subtilisin/ kexin proprotein convertase inhibitors for the intensification of lipid-lowering therapy in patients with acute coronary syndrome. This article presents the clinical case of the successful use of one of the inhibitors of the proprotein convertase of subtilisin/kexin type 9, alirocoumab, in lowering low-density lipoprotein cholesterol and thereby reducing the risk of repeated cardiovascular events in a patient with acute coronary syndrome.
Successful surgical treatment of intracardiac bone cement embolism after vertebroplasty of the L2 vertebral body
Authors: Zagorodnikov N. I. , Halivopulo I. K. , Sotnikov A. V. , Ardasheva E. I.
Published: January 2020

Percutaneous Vertebroplasty (PVP) is the minimally invasive radiological procedure consisting in the transdermal injection of bone cement into the damaged vertebral body. PVP performing has a high risk of complications including vascular embolism which has value from 3.5 to 30 %. There is an example of cardioembolism with bone cement as a result of PVP complication after surgical treatment of a patient with a spinal cord injury after ancar accident and the successful extraction of this embolus is given in this clinical case.The authors describe the approaches to this problem, including the diagnosis of the condition and treatment options.
Prevalence of coronary artery disease in the indigenous population of Gornaya Shoria (the results of epidemiological studies in 1998-2001 and 2013-2017)
Authors: Mihalina E. V. , Mulerova T. A. , Polikutina O. M. , Ogarkov M. Yu.
Published: January 2020

Aim. To study the features of the prevalence of coronary heart disease (CHD) in the period 1998–2001 and 2013–2017 in the indigenous population of Gornaya Shoria.

Methods. In the first period of the study (from 1998 to 2001), 550 respondents of indigenous nationality living in rural areas of Gornaya Shoria (v. Orton and v. Ust-Kabyrza) were included. In the second period (from 2013 to 2017) – 937 people in the same villages, as well as in the urban village Sheregesh and city Tashtagol. The presence of coronary artery disease was estimated by the sum of three epidemiological criteria: based on the analysis of ECG by Minnesota code, Rose questionnaire and a history of myocardial infarction. Statistical analysis was performed using the program Statistica 6.0 (StatSoft Inc., USA.) Qualitative features were described using frequencies as a percentage. To determine the statistical significance of these differences, Pearson's criterion c2 was evaluated. In the study, the critical level of significance when testing statistical hypotheses was taken p<0.05.

Results. The frequency of CHD in the first stage of the study in the village was 6.2%, in the survey of the rural population in the Gornaya Shoria in 2013–2017 this figure was 8.0%. Comparative analysis at the second stage of the study showed a higher prevalence of this disease among urban residents (12.6%) compared with rural (8.0%, p = 0.048). These differences reach statistical significance due to the female population in the age groups of 40–49 years and 50–59 years (7.1% vs. 0% (p = 0.051) and 15.4% vs. 4.1% (p = 0.031)). In males living in the city, revealed an earlier debut of CHD in 40–49 years (5.6%).

Conclusion. The study revealed an increase in the prevalence of CHD in women in the indigenous small population of Gornaya Shoria from 1998–2001 to 2013–2017, as well as a number of significant statistically significant differences in the frequency of CHD among the urban and rural population.
Comparison of percutaneous coronary intervention using bioresorbable vascular scaffold and minimally invasive direct coronary artery bypass for left anterior descending artery disease: 3-year clinical outcomes
Authors: Vakkosov K. M. , Ganjukov V. I.
Published: January 2020

Aim. Evaluates 3-year clinical outcomes of percutaneous coronary intervention (PCI) with bioresorbable vascular scaffold (BVS) versus minimally invasive direct coronary artery bypass (MIDCAB) surgery for the treatment of left anterior descending (LAD) lesions.

Methods. In this single-center study were included 130 patients with stable angina and significant (≥70%) LAD disease. Patients were randomly assigned in a 1:1 ratio to PCI with everolimus-eluting bioresorbable vascular scaffold (Absorb) (n = 65) or MIDCAB (n = 65). The primary end-point was major adverse cerebrocardiovascular events (MACCE) and secondary was. Primary and secondary endpoints were, respectively, major adverse cerebro-cardiovascular events (MACCE) and target vessel failure at 3-year.

Results.The groups of patients were comparable for all baseline demographic, clinical and angiographic parameters. The primary composite endpoint of MACCE through 3 years occurred in 16.9% of BVS patients and 9.2% of MIDCAB patients (p = 0.19). But 3-year any revascularization rates were higher with BVS (13.8% vs. 3.1%; p = 0.027). TVF was favor of the MIDCAB group (12,3% vs. 3,1%, p = 0.04), mainly triggered by high subsequent need for revascularization of the targeted vessel in the BVS group (9.2% vs. 1.5%; p = 0.05).

Conclusion. At 3-year follow-up, PCI by BVS and MIDCAB in in patients with isolated LAD lesions yielded similar long-term outcomes regarding the primary composite clinical endpoint. The bioresorbable scaffold was associated with a higher incidence of reinterventions, TVF and TVR than the MIDCAB through 3 years of follow-up.