bluuebunny/crossref_metadata_2025 huggingface dataset:
Reseña del libro La reforma integral de la educación básica: perspectivas de docentes y directivos de primaria, coordinado por Ángel Díaz Barriga
Authors: Díaz-Barriga Frida
Published: May 2019

Hoy más que nunca, ante el anuncio de un “nuevo modelo educativo” para la educación básica mexicana, es necesaria una mirada al fondo de la problemática que se genera cuando se instaura por decreto una reforma curricular. Es así que esta obra cobra gran relevancia, primero por el análisis que hace de lo sucedido con la Reforma Integral de la Educación Básica (RIEB), y segundo, por el escenario que podemos anticipar a través su lectura para lo que pude ser el devenir de la nueva reforma en su carácter de proyecto sello de la administración educativa en turno.
El desarrollo del pensamiento crítico en estudiantes universitarios por medio del Aprendizaje Basado en Problemas
Authors: Núñez-López Susana , Avila-Palet José-Enrique , Olivares-Olivares Silvia-Lizett
Published: May 2019

La educación basada en competencias busca el desarrollo de habilidades cognitivas que permiten al estudiante generar un pensamiento crítico que se traduce en la capacidad del estudiante para resolverproblemas dentro y fuera del aula. El propósito de este estudio fue encontrar el beneficio del Aprendizaje Basado en Problemas en el desarrollo de las competencias genéricas del pensamiento crítico. Se utilizóun método mixto con un diseño embebido y de tipo transeccional en un grupo de 27 personas de primer cuatrimestre de la materia de Introducción a la Nutrición y a la Dietética de la licenciatura en Nutrición,en una universidad privada de Iguala, Guerrero. Los instrumentos utilizados fueron el cuestionario decompetencias genéricas individuales, sección de pensamiento crítico adaptado (Olivares et al., 2013: 9) yla rejilla de observación para las habilidades del pensamiento crítico (Facione, 1990: 15). Los resultados indicaron que la técnica mencionada presentó un efecto positivo en las habilidades relacionadas al juicio de una situación específica, con datos objetivos y subjetivos.
Responsabilidad social universitaria a través de los reportes de sostenibilidad del Global Reporting Initiative: experiencia de una universidad pública
Authors: Huerta-Riveros Patricia , Gaete-Feres Héctor
Published: May 2019

Este artículo, lleva a cabo una aproximación al concepto de responsabilidad social universitaria y realiza una breve descripción de las metodologías para elaborar reportes de sostenibilidad, en particular del Glo- bal Reporting Initiative (gri). Posteriormente, a través del análisis de contexto del gri y la experiencia de una institución de educación superior, aporta evidencia empírica al respecto. Como resultados, se descu- bre que de 7 650 instituciones sólo 90 corresponden a universidades y, aplicando un estudio de caso a la Universidad del Bío-Bío, en Chile, se detecta que la metodología gri permite dar cuenta de las activida-des de responsabilidad social alcanzando el nivel A. Así se puede afirmar que los reportes de sostenibilidad muestran las actividades desarrolladas por las instituciones a través de un marco de certificación, al igualque sus compromisos de responsabilidad social.
Educación intercultural y culturas indígenas en América Latina: la licenciatura en Pedagogía de la Madre Tierra
Authors: Rivera Mateos Manuel , Osuna Rodríguez Mercedes , Rodríguez García Luis
Published: May 2019

Este trabajo analiza la experiencia de implantación y funcionamiento de la licenciatura en Pedagogía de laMadre Tierra de la Universidad de Antioquia (Colombia) como programa específico e innovador de edu- cación superior —único en su género en América Latina— que pretende profundizar en la problemáticade la educación intercultural universitaria adaptada a las necesidades y especificidades de las comunidadesindígenas. Esta licenciatura se plantea desde diversas dimensiones y enfoques relacionados con el desarro- llo de los planes de vida indígena y las cosmovisiones y cosmogonías de sus pueblos, el fomento del diálogo intercultural y la diversidad cultural. El análisis y el avance efectuado en la sistematización del modelo educativo se centra, entre otros aspectos, en los encuentros zonales de formación mantenidos entre el equipo de profesionales, docentes y facilitadores del programa académico y las comunidades indígenas, laestructura curricular, los perfiles de los proyectos comunitarios de los estudiantes indígenas, la homologa-ción de títulos y las oportunidades, limitaciones y dificultades encontradas, así como las perspectivas que se han abierto con el reconocimiento institucional y académico de la titulación.
Universidades: mitos, modas y tendencias
Authors: Mora José-Gines
Published: May 2019

Las universidades, como el resto de las instituciones humanas, no han sido ni son ajenas a combinar la necesidad real de cumplir una misión socialmente deseable con un conjunto de mitos, modas y tendencias que no siempre soportan un análisis crítico, ése que los universitarios aplicamos a otros campos del saber pero que tendemos a olvidar cuando analizamos nuestra entorno más cercano. Es relevante analizar desde una posición crítica (que no es necesariamente negativa) las tendencias que dominan el panorama actual de la educación superior. Como en todos los fenómenos sociales, estas tendencias están basadas en deman- das reales, pero a las que se han ido añadiendo elementos de dudosa validez que desvirtúan en muchos casos los objetivos iniciales que explican el origen de la tendencia. En este artículo se analizan algunos mitos, algunas tendencias, que en algún caso son posiblemente meras modas, y ciertos aspectos que real- mente forman parte de la esencia de la universidad: servir a la sociedad formando personas preparadas para vivir y trabajar en un mundo globalizado.
Capital cultural en el contexto tecnológico: consideraciones para su medición en la educación superior
Authors: Salado-Rodríguez Lilián-Ivetthe , Ramírez-Martinell Alberto
Published: May 2019

En las instituciones educativas se realizan importantes inversiones económicas para mejorar el acceso a servicios y herramientas tecnológicas sin tener clara la orientación que se debe seguir. Con el objetivo de conocer sobre los hábitos, prácticas y aprovechamiento que tienen los jóvenes universitarios de la tecno- logía digital, se llevó a cabo una investigación encaminada a desentrañar aspectos puntuales del capital cultural de los estudiantes universitarios en un contexto tecnológico. El estudio se llevó a cabo en dos universidades públicas, ubicadas al noroeste de México, con una muestra de 524 estudiantes. Para re- cabar la información se utilizó una encuesta mediante la cual se analizaron aspectos socioeconómicos y académicos que inciden en las prácticas de los estudiantes al hacer uso de las tecnologías de informacióny comunicación. En los resultados observamos que los estudiantes, al menos en este contexto geográficodel país, no tienen problemas para acceder a los recursos tecnológicos pero no hay un aprovechamiento óptimo que reditúe en su preparación académica y futuro desempeño como profesionales.
Creatividad, género y rendimiento académico en ingresantes de ingeniería
Authors: Chiecher Analía-Claudia , Elisondo Romina-Cecilia , Paoloni Paola-Verónica , Donolo Danilo-Silvio
Published: May 2019

La presente investigación atiende a las relaciones entre las capacidades y acciones creativas desplegadas por ingresantes en carreras ingeniería, el género y el rendimiento académico logrado en el tránsito del primer año de estudios. Los datos fueron recogidos a partir de la administración de un test que mide capacidades creativas y un cuestionario que evalúa acciones creativas en distintas áreas. Un total de 134 ingresantes en carreras de Ingeniería de una universidad pública argentina dieron respuesta a los ins- trumentos referidos. Los resultados muestran diferencias conforme al género, a favor de las mujeres, así como puntuaciones más elevadas para el grupo de alto rendimiento en el despliegue de acciones creativas relacionadas con el área de ciencia y tecnología. Las conclusiones avalan, por un lado, la complejidad de las vinculaciones entre creatividad, género y rendimiento. Por otro lado, señalan la importancia de crear contextos educativos que, desde el ingreso mismo, propicien el despliegue de acciones creativas.
Paulo Freire, el inea y la educación de jóvenes y adultos en México
Authors: Larentes da Silva Adriano
Published: May 2019

Este trabajo retoma la visita de Paulo Freire al Instituto Nacional para la Educación de Adultos (inea), en la ciudad de México, en 1983. El objetivo es entender cuáles eran entonces las grandes cuestiones y desafíos relacionados con la educación de jóvenes y adultos (eja) y cuáles siguen presentes hoy. A partir de las observaciones hechas por Freire durante su visita, se abordarán temas centrales en el debate sobre la eja, como la opción por el autodidactismo y la solidaridad social y el trabajo por medio de asesorías y metas en la educación de jóvenes y adultos. El análisis sobre los temas propuestos se realizará a partir de la biografía y de los escritos de Paulo Freire, así como de un conjunto de materiales colectados durante el trabajo de campo realizado entre 2014 y 2015 en la Ciudad de México, Chiapas, Puebla y San Luis Potosí. En esta investigación participaron más de 150 educandos de la eja y más de 50 personas con tareas de coordinación, formación, producción de materiales didácticos, acompañamiento y asesoría a jóvenes y adultos. Todo ello permitió establecer innumerables conexiones entre el pensamiento freireano, la educación popular, las políticas públicas para la eja en México y demás países latinoamericanos, y los desafíos actuales para la materialización de la eja en el ámbito del inea.
¿Aumentar la cobertura aumenta la equidad?: el caso de la educación superior en México de 1990 a 2010
Authors: Enciso-Ávila María-Isabel , Planas-Coll Jordi
Published: May 2019

En este artículo se pretende demostrar si existe una relación positiva entre cobertura y equidad en el acceso a la educación superior. Bajo el supuesto de que el acceso a cualquier nivel no obligatorio empieza siendo minoritario, para aquellos socialmente mejor situados y en la medida que la cobertura se amplía ello conlleva generar nuevos espacios que permitan el acceso de sectores sociales menos privilegiados, con lo cual se irá aumentando progresivamente el grado de equidad social de dicho nivel de estudio. Setoman los datos oficiales de cobertura de los informes de gobierno y los censos de población en Méxicopara comparar la evolución de los indicadores de 1990 a 2010. Se observa que la cobertura ha aumentado de manera generalizada, conservando la tendencia tanto en estados como en regiones, pero elcomportamiento de la equidad muestra una evolución opuesta. Lo anterior permite afirmar que, en estas dos décadas, el aumento de la cobertura no implica un aumento en la equidad en la educación superior.
Pensar la reforma universitaria cien años después
Authors: Buchbinder Pablo
Published: May 2019

En este ensayo se ofrece un breve análisis de la historia del movimiento de la Reforma Universitaria, iniciado en la Universidad de Córdoba, Argentina, en 1918. Se intenta estudiar las raíces académicas de este movimiento y las causas de su proyección en América Latina. También se incluye una breve re-flexión sobre la actualidad y vigencia de los ideales reformistas.
La aplicación de la política de “re-dimensionamiento” en la Universidad de Buenos Aires durante la última dictadura (1976-1983)
Authors: Seia Guadalupe
Published: May 2019

En el presente artículo nos proponemos describir la política de “re-dimensionamiento” aplicada en la Universidad de Buenos Aires (uba) durante la última dictadura en Argentina (1976-1983). Caracterizamos las principales modalidades utilizadas para “adecuar” el tamaño de las casas de altos estudios a los nuevos parámetros establecidos. Asimismo, analizamos los efectos que estas medidas tuvieron. Así, procuramos complejizar el conocimiento disponible sobre la política universitaria dictatorial en Argentina. Hemos utilizado una estrategia metodológica de triangulación de fuentes documentales oficialesde diversos tipos (estadísticas, memorias, discursos de autoridades, etcétera), de la prensa escrita y de testimonios orales recolectados en el marco de nuestra investigación.
Las políticas de género en una universidad pública estatal: discrepancias institucionales
Authors: López-Molina Sergio-Alberto , Vázquez-Guerrero Marina
Published: May 2019

Este artículo presenta un análisis de la documentación institucional sobre políticas de género en una universidad pública mexicana y las acciones concretas en la gestión cotidiana. Tras la revisión detallada de normativas, códigos y políticas institucionales que funcionan como marcos de referencia para la práctica educativa en una universidad pública, se contrastó con el testimonio de algunos directivos de alto nivel, permitiendo conocer cómo estos referentes intervienen en las relaciones estructurales. Entre los principales hallazgos se puede identificar que la preocupación por temas como la violencia de género es reciente y sólo se ha trabajado en el nivel de investigaciones de cuerpos académicos, sin llegar a influiren el nivel institucional para la toma de decisiones, por lo tanto, los temas de género no son prioritarios y cuando se incluyen se ponen en la misma jerarquía de grupos vulnerables.
La educación sigue siendo un “tesoro”. Educación y docentes en los informes internacionales de la UNESCO
Authors: Sanz-Ponce Roberto , González-Bertolín Aurelio
Published: May 2019

Los informes de la UNESCO (1973, 1996 y 2015) establecen las líneas centrales por las que debe transitarla educación en cada momento. En ellos se analiza la finalidad de la educación y el papel que juega el docente en la escuela. Por tanto, tiene un carácter prospectivo. El objetivo fundamental de este ensayo es desentrañar estos aspectos y enunciar algunos de los retos y desafíos a los que se va a enfrentar la educa-ción y sus docentes en los próximos años, todo ello a la luz de las propuestas del organismo internacional.
Pengaruh Perbedaan Spesies Luwak Terhadap Kadar Kofein Dari Kopi Luwak Jenis Robusta
Authors: Yulia Rahma , Zamrud Adnan Adek , Prima Putra Deddi
Published: May 2019

The influence of different species of civet on caffeine content of Robusta civet coffee ( Coffea Robusta) had been done. The Civet species used are Paradoxurus Hermophroditus (Pandan civet) and Arctictis Binturong ( Bulan civet). The Coffee used is Robusta varieties ( Coffea Robusta). Caffeine’s level of robusta civet coffee has been given to two species of civet and after that they are analyzed using TLC Scanner Method quantitatively. The process of robusta civet coffee extraction was done by using Dichloromethane solvent and sonicated for 15 minutes on  themperature 40 º C, then the filtrate obtained was filtered with whatmant filter paper, then concentrated by using rotary evaporator. The quantitative analysis measured from the caffeine was measured using Thin Layer Chromatograpy ( TLC ) then Scanned by Densitometry ( TLC Scanner ) to obtain the content of caffeine from the civet coffee. Robusta coffee beans given to the civet Bulan (Arctictis Binturong) species have 1,91 % caffeine content where the caffeine content is higher when compared to robusta  coffee given to Pandan civet (Paradoxurus Hermophroditus) which has only 1,30 % caffeine. Based on the SPSS 21 anne-ment using anava Three Roads, it is known that differences in civet species affect the levels of robusta civet coffee caffeine.

Telah dilakukan Penelitian Pengaruh Perbedaan Spesies Luwak Terhadap Kadar Kofein dari Kopi Luwak Jenis Robusta (Coffea Robusta). Spesies Luwak yang digunakan adalah Paradoxurus Hermophroditus ( Luwak Pandan) dan Arctictis Binturong ( Luwak Bulan). Kopi yang dipakai adalah spesies Robusta ( Coffea Robusta). Kadar kofein kopi luwak robusta yang diberikan kepada dua spesies luwak tersebut kemudian dianalisis menggunakan metode TLC Scanner secara kuantitatif. Proses Ekstraksi Kopi luwak robusta dilakukan dengan  menggunakan pelarut diklorometan dan disonikasi selama 15 menit kemudian filtrate yang diperoleh disaring dengan kertas saring Whatman kemudian dipekatkan dengan rotary evaporator. Analisis kuantitatif dari kofein di ukur dengan menggunakan Kromatografi Lapis Tipis ( KLT ) kemudian di Scanning dengan alat  Densitometri (TLC Scanner) sehingga diperoleh kadar kofein dari kopi luwak tersebut. Biji Kopi Robusta yang diberikan pada Spesies luwak Bulan ( Arctictis Binturong ) mempunyai kadar kofein 1, 91 % dimana kadar kofein ini lebih tinggi jika dibandingkan dengan kopi robusta yang diberikan kepada luwak pandan (Paradoxurus Hermophroditus) yang hanya memiliki kadar kofein 1, 30 %. Berdasarkan analisis SPSS 21 menggunakan Anava tiga Jalan diketahui bahwa perbedaan spesies luwak mempengaruhi kadar kofein kopi luwak robusta.
Implementasi Manajemen Pendidikan Inklusi di PAUD Inklusi Saymara Kartasura
Authors: Shofa Mila Faila
Published: May 2019

This study attempts to describe the concept of inclusive education management in Early Childhood Education; to describe the implementation of inclusive education management in PAUD Inklusi Saymara Kartasura; to describe the implementation of inclusive education management in PAUD Inklusi Saymara. The method used is descriptive qualitative with research place in PAUD Inklusi Saymara Kartasura, Sukoharjo, Central Java. Data collection used observation, interview and documentation techniques on the implementation of inclusive education management, where the data validity checks used the source triangulation technique. The results of the study explain that inclusive education management in PAUD Inklusi Saymara is implemented in several stages: preparation of vision, mission and objectives of Early Childhood Education with inclusion setting, preparation of program of development and implementation of Inclusive education, Acceptance of students with inclusive setting, understanding the children with special needs, preparing Human Resources , preparing learning system and reporting of child development, Provision of facilities and infrastructures, cooperation with other parties, and monitoring and evaluation of early childhood education inclusion.
Trade in Services-Economic Growth Nexus: An Analysis of the Growth Impact of Trade in Services in SADC Countries
Authors: Maune Alexander
Published: May 2019

The article analysed the trade in services led growth in ten selected countries in the Southern African Development Community region using econometric regression models. Panel data obtained from the World Bank and United Nations Conference on Trade and Development databases for the period 1992 to 2015 was analysed. Five variables were used in the econometric analysis. The marginal effects of service and goods exports were positive while those of goods and service imports were negative and highly significant as was expected from literature. Service exports registered an impact that was almost threefold that of service imports and greater than goods exports. Policy-makers are encouraged to, clearly define their trade in service strategy and reduce or remove trade restrictions. The study is of importance to researchers, the private sector and government policymakers.
Effects of Public Expenditure on Gross Domestic Product in Zambia from 1980-2017: An ARDL Methodology Approach
Authors: Mpundu Mubanga , Mwafulirwa Jane , Chaampita Mutinta , Salwindi Notulu
Published: May 2019

The paper explored the fundamental changes in public expenditure and the resulting effect on the gross domestic product using an ARDL approach for time series data over the period 1980-2017. The control variables included foreign direct investment and current account balance. The objective was to determine changes which had occurred with regard to the performance of GDP since 1980. A quantitative method approach was used to ascertain the relationship between the variables and analysed using the E-views 9 software. Cointegration results showed a long run relationship between GDP and government expenditure. In this regard, changes in government expenditure have a strong converse effect on GDP. Government expenditure, which has increased significantly in the past decade, is seen to have had negative effects both in the short run and long run. Contrary to theory, increased government expenditure may not be ideal for growing the Zambian economy. This could be due to the allocation of this public expenditure, i.e. the 2018 Budget had 24% of the expenditure directed to economic activities. Thus it is recommended that government practice increased fiscal discipline or reallocated resources as their expansionary fiscal policies are not yielding the intended results. Additionally, policies to promote private investment may be more beneficial for the Zambian economy. On the other hand, increased investment is also recommended with government encouraging more investment promoting policies as FDI is observed to have a positive impact in the short run though insignificant in the long run. These should ensure more investors are encouraged to stay longer and the impacts/externalities of their investments be accrued to the nationals to ensure long run benefits. The Zambian government should also ensure that the country diversifies its export base and enhances its external debt management to ensure positive and consistent impact of Current Account Balance in the long run.
Investigating the Banking Sector Development Transmission Mechanism of Financial Development to Growth: Evidence from Sub-Saharan Africa (SSA)
Authors: Okoli Tochukwu Timothy , Oluwafisayomi Ajibola Rhoda
Published: May 2019

The search for financial developmentâ€™s transmission channel to growth has always been updated in the literature. While there has not been a consensus on this matter, empirical findings on finance-growth nexus have been ambiguous. Relying on this, we investigate its bank development transmission channel to growth in a panel of twenty-eight Sub-Saharan Africa (SSA) countries from 2000-2016. Having adopted the augmented Solow (1956) and Mankiw et al. (1992) growth model, the fixed effect and dynamic system GMM estimation techniques reveals a negative non-significant and positive significant direct impact of finance on growth in the static and dynamic models respectively, thereby suggesting institutional (dynamic) factors that can spur finance. Secondly, the non-linear effects of bank development had a direct positive significant impact on growth and its marginal-effects before and after the financial crisis of 2007/08 were relatively stable. This implies that banks in SSA were relatively stable in financial intermediation; therefore SSA countries need to reinforce and improve its banking policy through FinTechs adoption. Finally, the interaction between bank development and financial development significantly increase steady-state growth. This implies that SSA economies can promote steady-state growth from financial development only when a threshold of bank development is reached.
Dynamics of Ethnic Politics in Nigeria: An Impediment to its Political System
Authors: Adetiba Toyin Cotties
Published: May 2019

Without any form of prejudice, it is a fact that Nigeria is a multi-ethnic state with differences in its socio-political and economic development all of which have resulted in conflicts and counter conflicts. Ethnic politics in Nigeriaâ€™s political system have come to be a tragic and constant in Nigeriaâ€™s political system; where one must belong to the mainstream of ethnic politics for political relevance. It depicts attachments to the sub-national ethnic groups which threaten to undermine national integration and therefore divide the nation. Significantly, ethnicity in Nigeria was orchestrated by a long period of colonialism, a period which witnessed the ascendancy of the three major ethnic groups in Nigeria to the socio-political domination of other ethnic groups. It was a period when the three major ethnic groups were used by the colonialist as a pedestal for the distribution of socio-political and economic goods. Using a mixed method, this work argues that Nigeriaâ€™s political problem hinges on the negative consequences of ethnic politics. The paper concludes that if Nigeriaâ€™s political system must progress, it must be anchored on the need for the review of the constitutional and political structure of Nigeria to restore healthy political competition as opposed to the existing outdated political mechanism imposed on Nigeria by the military under the 1999 Constitution of the Federal Republic of Nigeria.
Weak associativity and quasigroup units
Authors: Krapez Aleksandar
Published: May 2019

We investigate a family of identities similar to weak associativity:
x(y/y)?z = x?(y/y)z which might imply the existence of
the {left, right, middle} unit in a quasigroup. A partial solution to
Krapez, Shcherbacov Problem concerning such identities and consequently
to similar well known Belousov's Problem is obtained. Another problem by
Krapez and Shcherbacov is solved affirmatively, showing that there are
many single identities determining unipotent loops among quasigroups.
On a graph connecting hyperbinary expansions
Authors: Brunetti Maurizio , D'Aniello Alma
Published: May 2019

A hyperbinary expansion of n is a representation of n as sum of powers of
2, each power being used at most twice. We study some properties of a
suitable edge-coloured and vertex-weighted oriented graph A(n) whose nodes
are precisely the several hyperbinary representations of n. Such graph
suggests a method to measure the non-binarity of a hyperbinary expansion. We
discuss how it is related to (p,q)-hyperbinary expansions. Finally, we
identify those integers m\in\N such that the fundamental group of A(m)
is Abelian.
Degrees of the approximation of integrable functions by some special matrix means of fourier series
Authors: Kranz Radosława , Rzepka Aleksandra , Sylwestrzak-Maślanka Ewa
Published: May 2019

We consider the pointwise and normwise approximation of function by some
special matrix means of its Fourier series. The results corresponding to the
theorem of ?enski and Szal in [5] and the results of Saini and Singh in
[6] are shown. Some special cases as corollaries are also formulated.
The convolution of finite number of analytic functions
Authors: Sharma Poonam , Krishna Ravinder , Sokół Janusz
Published: May 2019

We investigate various results associated with the convolution of finite
number of analytic functions involving a certain multiplier operator
(defined below). Some useful consequences including a result related to the
zeta function are also mentioned.
Functions with constant sums over a hyperplane and applications
Authors: Ponpetch Kanet , Mavecha Sukrawan , Laohakosol Vichian
Published: May 2019

Two functional equations exhibiting functions with constant sums over points
lying in a hyperplane are solved, and the results are applied to
characterize major trigonometric and hyperbolic functions.
Reverse Hilbert inequalities involving series
Authors: Zhao Chang-Jian , Cheung Sum
Published: May 2019

Some reverse Hilbert's type inequalities involving series of nonnegative
terms are established by the use of the technique of real analysis, which
provides new estimates on inequalities of these type.
Pell factoriangular numbers
Authors: Luca Florian , Odjoumani Japhet , Togbé Alain
Published: May 2019

We show that the only Pell numbers which are factoriangular are 2,5 and
12.
Analytical and numerical aspect of coincidence point problem of quasi-contractive operators
Authors: Gürsoy Faik , Ertürk Müzeyyen , Khan Abdul , Karakaya Vatan
Published: May 2019

We propose a new Jungck-S iteration method for a class of quasi-contractive
operators on a convex metric space and study its strong convergence, rate of
convergence and stability. We also provide conditions under which
convergence of this method is equivalent to Jungck-Ishikawa iteration
method. Some numerical examples are provided to validate the theoretical
findings obtained herein. Our results are refinement and extension of the
corresponding ones existing in the current literature.
Evaluation of symptoms and sings of oral soft tissue disorders among inpatients with schizophrenia
Authors: Djordjevic Vladan , Jovanovic Mila , Joksimovic Ena , Asotic Amina , Stasevic Milena , Asotic Jasminka , Petrovic Vanja , Stasevic-Karlicic Ivana
Published: May 2019

Introduction. Patients with schizophrenia are likely to constitute a high-risk group of individuals with respect to prevalence of oral diseases and they require special attention. Factors like nature of psychiatric disorders, length of stay and oral-side effects of psychotropic medications have been noted as contributors to poor oral health among institutionalized chronic psychiatric patients. Methods. This cross-sectional study comprised 190 inpatients with schizophrenia at the Dr Laza Lazarevic Clinic for Mental Disorders in Belgrade, and 190 mentally healthy patients at the Clinic for Periodontology and Oral Medicine, School of Dental Medicine, University of Belgrade. A questionnaire was designed for the purpose of this research with the aim of recording information on demographic data (age and sex), unhealthy habits (tobacco smoking, alcohol consumption and drug abuse), and data about the existence of any oral symptom and/or sings related to oral soft tissue pathology. All participants were subjected to targeted clinical examinations. Results. All study group patients were receiving psychotropic medications (mean number 4.18 ? 1.14; from 1 to 7 medications). The study group patients had a total of 272 symptoms and 121 signs of oral disorders; which was almost four times higher for symptoms and even nine times higher for signs of oral disorders than in the control group. Conclusion. Schizophrenia as a mental disorder does not directly affect the condition of oral health of this group of psychiatric patients, but indirectly ? reducing their motivation and awareness of the importance of oral health, which is particularly emphasized in hospital conditions.
Bounds of the stationary distribution in M/G/1 retrial queue with two-way communication and n types of outgoing calls
Authors: Alem Lala , Boualem Mohamed , Aissani Djamil
Published: May 2019

In this article we analyze the M=G=1 retrial queue with two-way communication and n types of outgoing calls from a stochastic comparison viewpoint. The main idea is that given a complex Markov chain that cannot be analyzed numerically, we propose to bound it by a new Markov chain, which is easier to solve by using a stochastic comparison approach. Particularly, we study the monotonicity of the transition operator of the embedded Markov chain relative to the stochastic and convex orderings. Bounds are also obtained for the stationary distribution of the embedded Markov chain at departure epochs. Additionally, the performance measures of the considered system can be estimated by those of an M=M=1 retrial queue with two-way communication and n types of outgoing calls when the service time distribution is NBUE (respectively, NWUE). Finally, we test numerically the accuracy of the proposed bounds.
Liver Function and Risk of Type 2 Diabetes: Bidirectional Mendelian Randomization Study
Authors: De Silva N. Maneka G. , Borges Maria Carolina , Hingorani Aroon D. , Engmann Jorgen , Shah Tina , Zhang Xiaoshuai , Luan Jian'an , Langenberg Claudia , Wong Andrew , Kuh Diana , Chambers John C. , Zhang Weihua , Jarvelin Marjo-Ritta , Sebert Sylvain , Auvinen Juha ,   UCLEB consortium, Gaunt Tom R. , Lawlor Deborah A.
Published: May 2019

Liver dysfunction and type 2 diabetes (T2D) are consistently associated. However, it is currently unknown whether liver dysfunction contributes to, results from, or is merely correlated with T2D due to confounding. We used Mendelian randomization to investigate the presence and direction of any causal relation between liver function and T2D risk including up to 64,094 T2D case and 607,012 control subjects. Several biomarkers were used as proxies of liver function (i.e., alanine aminotransferase [ALT], aspartate aminotransferase [AST], alkaline phosphatase [ALP], and γ-glutamyl transferase [GGT]). Genetic variants strongly associated with each liver function marker were used to investigate the effect of liver function on T2D risk. In addition, genetic variants strongly associated with T2D risk and with fasting insulin were used to investigate the effect of predisposition to T2D and insulin resistance, respectively, on liver function. Genetically predicted higher circulating ALT and AST were related to increased risk of T2D. There was a modest negative association of genetically predicted ALP with T2D risk and no evidence of association between GGT and T2D risk. Genetic predisposition to higher fasting insulin, but not to T2D, was related to increased circulating ALT. Since circulating ALT and AST are markers of nonalcoholic fatty liver disease (NAFLD), these findings provide some support for insulin resistance resulting in NAFLD, which in turn increases T2D risk.
Hyperglycemia Enhances Constriction of Retinal Venules via Activation of the Reverse-Mode Sodium-Calcium Exchanger
Authors: Chen Yen-Lin , Xu Wenjuan , Rosa Robert H. , Kuo Lih , Hein Travis W.
Published: May 2019

Diabetes is associated with hyperglycemia and impairment of retinal microvascular function. However, the impact of hyperglycemia on retinal venular constriction remains unknown. We examined retinal venular responsiveness to endogenous vasoconstrictors and the contribution of the reverse-mode sodium-calcium exchanger (NCX) to these responses during hyperglycemia. Retinal venules were isolated from pigs with streptozocin-induced diabetes (2 weeks, in vivo hyperglycemia) and age-matched control pigs for vasoreactivity and molecular studies. For in vitro hyperglycemia, vessels from euglycemic pigs were exposed to high glucose (25 mmol/L) for 2 h, and 5 mmol/L glucose served as the control. Constrictions of venules from euglycemic pigs to endothelin-1 (ET-1), thromboxane analog U46619, and norepinephrine were mediated by ETA, thromboxane, and α2-adrenergic receptors, respectively, and were insensitive to reverse-mode NCX blockade (KB-R7943). In vivo hyperglycemia enhanced these vasoconstrictions without altering respective receptor mRNA expression. Similarly, in vitro hyperglycemia augmented venular constrictions. Enhanced vasoconstrictions during hyperglycemia were prevented by KB-R7943, while mRNA expression of venular NCX isoforms was unaltered. In vivo hyperglycemia increased vitreous levels of ET-1 but not thromboxane B2. In conclusion, both in vitro and in vivo hyperglycemia enhance retinal venular responses to endogenous vasoconstrictors by activating reverse-mode NCX. Therapies targeting this vascular molecule may alleviate retinal complications during diabetes.
TFAM Enhances Fat Oxidation and Attenuates High-Fat Diet–Induced Insulin Resistance in Skeletal Muscle
Authors: Koh Jin-Ho , Johnson Matthew L. , Dasari Surendra , LeBrasseur Nathan K. , Vuckovic Ivan , Henderson Gregory C. , Cooper Shawna A. , Manjunatha Shankarappa , Ruegsegger Gregory N. , Shulman Gerald I. , Lanza Ian R. , Nair K. Sreekumaran
Published: May 2019

Diet-induced insulin resistance (IR) adversely affects human health and life span. We show that muscle-specific overexpression of human mitochondrial transcription factor A (TFAM) attenuates high-fat diet (HFD)–induced fat gain and IR in mice in conjunction with increased energy expenditure and reduced oxidative stress. These TFAM effects on muscle are shown to be exerted by molecular changes that are beyond its direct effect on mitochondrial DNA replication and transcription. TFAM augmented the muscle tricarboxylic acid cycle and citrate synthase facilitating energy expenditure. TFAM enhanced muscle glucose uptake despite increased fatty acid (FA) oxidation in concert with higher β-oxidation capacity to reduce the accumulation of IR-related carnitines and ceramides. TFAM also increased pAMPK expression, explaining enhanced PGC1α and PPARβ, and reversing HFD-induced GLUT4 and pAKT reductions. TFAM-induced mild uncoupling is shown to protect mitochondrial membrane potential against FA-induced uncontrolled depolarization. These coordinated changes conferred protection to TFAM mice against HFD-induced obesity and IR while reducing oxidative stress with potential translational opportunities.
Efficacy of Direct Restorative Materials in Proximal Box Elevation on the Margin Quality and Fracture Resistance of Molars Restored With CAD/CAM Onlays
Authors: Grubbs TD , Vargas M , Kolker J , Teixeira EC
Published: May 2019

Purpose:

The purpose of this study was to investigate the effect of four direct restorative materials that can be used in the proximal box elevation (PBE) technique.

Methods and Materials:

Seventy-five molar teeth were randomly assigned to one of five groups (n=15): type II glass ionomer (GI), type II resin-modified glass ionomer (RMGI), resin-based composite (RBC), bulk-fill (BF) resin-based composite, and a control with no box elevation procedure. Specimens were prepared for a standard mesio-occlusal-distal, computer-aided design/computer-aided manufactured (CAD-CAM) resin, nanoceramic onlay with mesial cervical margins located 1 mm above the cementoenamel junction (CEJ) and distal cervical margins located 2 mm below the CEJ. PBE was used to elevate the distal margins to 1 mm above the CEJ in all groups except the control group. For the control group the onlay margin was placed directly on the prepared distal tooth structure without PBE. A Lava Ultimate CAD/CAM resin, nanoceramic onlay restorative was manufactured and bonded on all specimens with RelyX Ultimate adhesive resin cement. The quality of the tooth-PBE material and PBE material-onlay interface was evaluated with scanning electron microscopy using epoxy resin replicas before and after cyclic loading (100,000 cycles, 1.2 Hz at 65N and 37°C). In addition to margin quality, the fracture resistance of each group was measured using a universal testing machine. Fracture pattern was recorded by visual examination. The Levene test for homogeneity and the Welch analysis of variance were completed for fracture resistance and margin quality. A χ2 test was completed for break mode.

Results:

For dentin margins, a statistically significant difference was detected between the RMGI and control groups at baseline (p=0.0442). All other groups—GI, RBC, and BF—showed no difference from the control at baseline (p>0.05). No statistical significance was observed among groups for post-cyclic fatigue (p=0.8735). For onlay margins, no statistical significance was observed among groups for pre-cyclic fatigue, post-cyclic fatigue, or change (p=0.9713, p=0.528, p=0.4385, respectively). No significant difference was observed for the fracture resistance among groups or for the type of break by material used (p=0.1593, p=0.77, respectively).

Conclusion:

Within the parameters of this study, after mechanical fatigue, the materials used for PBE: RMGI, RBC, and BF, did not influence results in terms of margin quality and fracture resistance. Therefore, collective findings suggest that these materials might be suitable for PBE procedures. Nevertheless, clinical caution is recommended with any PBE procedure and further testing of GI materials is needed.
Adapting the p300 brain-computer interface technology to assess condition of anorexia nervosa patients
Authors: Ganin I. P. , Kosichenko E. A. , Sokolov A. V. , Ioannisyanc O. M. , Arefev I. M. , Basova A. Ya. , Kaplan A. Ya.
Published: May 2019

Brain-computer interface based on the P300 wave (P300 BCI) allows activating a given command according to the electroencephalogram (EEG) response to a predetermined relevant stimulus. The same algorithm enables detecting a subjectively important item (i.e., one triggering emotional response) in an environment even without actively drawing attention to it. Such systems allow assessing the personal significance of certain information, which can be used in the diagnostics of disorders of emotional perception or value system, e.g., eating disorders. This study aimed to investigate the EEG responses of anorexia nervosa patients (diagnosis F50.0, n = 12, age 11–16 years) to the stimuli with different perceived emotional significance, as well as to validate application of P300 BCI to detect the focus of attention to subjectively important stimuli. The inclusion criteria were: diagnosed anorexia nervosa (diagnosis F50.0); active rehabilitation. We registered the EEG while presenting images with different content to the patients. The event-related potentials (ERP) were detected and analyzed with the help of MATLAB 7.1 (MathWorks; USA). Statistica 7.0 software (StatSoft; USA) was used for statistical analysis of the data. We have discovered that in passive viewing paradigm, images of body parts of emaciated people among other images caused ERP with higher amplitude than images of food. Moreover, the accuracy of detection was higher for images of body parts: 89% against 59%, respectively. Thus, we have proven the validity of applying P300 BCI to detect covert emotional foci of attention and added to the existing knowledge about the mechanisms of development of anorexia nervosa.
Analysis of divergence between the axes of dental implants installed using a classic freehand technique
Authors: Ivashchenko AV , Yablokov AE , Fedyaev IM , Tlustenko VP , Rotin NE , Tugushev VV
Published: May 2019

Accuracy is a common challenge in dental implant placement. A successful clinical outcome is largely determined by accurate positioning of the implant at the prepared site and proper angulation. This study aimed to compare the divergence between the axes of the implants installed using a classic freehand technique. Cartesian coordinates of implant necks were determined on the CT images of 34 patients in the XOY (horizontal) plane, followed by the coordinates of implant apices. The obtained data were submitted to the original software developed by the authors (patent 2018661716) that automatically computed an angle between the insertion axes of the installed implants. We found that in 87% of cases, this angle was significantly greater (up to 27°) than recommended by implantation dentistry guidelines (7°). In 100% of the studied cases, the implants were not parallel; in sector 1, the deviation was 27° 4`.
Roma pelos olhos de Cecília Meireles
Authors: Lopes Delvanir
Published: May 2019

Cecília Meireles é poetisa-viajante. Quando voltava da viagem à Índia, fez uma parada de cerca de dois meses na Itália. Nesse curto período, percorreu diferentes regiões, entre elas: Roma, Nápoles, Pompeia, Sorrento, Florença e Milão. Dos lugares em que esteve, Roma parece ter sido o mais especial, tanto que a escritora alimentava sempre o desejo de retornar à "cidade eterna". Este estudo propõe-se a visitar alguns dos locais em que a viajante esteve e quais as impressões que ela teve e que resultaram, muitos deles, em poemas presentes na obra dedicada à Itália: Poemas italianos.
literatura romântica portuguesa sob o olhar de Álvares de Azevedo e Lopes de Mendonça: diálogos críticos
Authors: Santos Natália Gonçalves de Souza
Published: May 2019

O ensaio "Literatura e civilização em Portugal", de Álvares de Azevedo, divide a história literária portuguesa em duas fases que já vêm designadas em seu próprio título: a heroica, dedicada a Ferreira e Camões, e a negra, circunscrita a Bocage. Porém, para além do cânone já estabelecido, Azevedo faz um importante comentário, embora panorâmico, sobre aquilo que havia de mais recente no cenário literário português em torno de 1850. E, para isso, recorre aos escritos também recentes de um crítico contemporâneo, Lopes de Mendonça, e seus Ensaios de crítica e literatura (1849), coligidos de uma publicação anterior no periódico A Revolução de Setembro. A leitura feita pelo ensaísta brasileiro sinaliza, em uma geração literária cujo interesse se voltava notadamente para França e Inglaterra, a manutenção dos diálogos entre portugueses e brasileiros, mesmo após a independência política do Brasil e a pretendida ruptura proveniente dela. Assim, este artigo pretende analisar pontos de contato e dissonância entre as posições dos dois autores diante do romantismo português, a partir da leitura que Azevedo faz de Mendonça, cujo pensamento crítico foi marcado por um socialismo exacerbado e pela condenação dos excessos do ultrarromantismo.
De Suze a Suzy: as cocottes de António Patrício e Manoel de Oliveira
Authors: Pereira Paulo Alexandre Cardoso
Published: May 2019

Integrado na coletânea Serão inquieto (1910), de António Patrício, o conto "Suze" tem sido unanimemente considerado como uma obra-prima do género. Neste artigo, são, num primeiro momento, examinadas as estratégias de composição do retrato da cocotte, protagonista do conto, correlacionando-as com a mitologia contrapolar do feminino que a literatura finissecular ajudou a difundir. De seguida, propõe-se o confronto da narrativa de Patrício com a sua adaptação cinematográfica por Manoel de Oliveira que, no filme Inquietude (1998), o converte numa das histórias de um tríptico narrativo. Apesar do que manifestamente as afasta, nas cocottes de Patrício e de Oliveira torna-se ostensiva uma idêntica pulsão de autoencenação que se traduz numa contaminação dramática tanto do conto, como do filme.
O léxico da cultura açucareira na construção do mundo atlântico: Madeira, Canárias, Cabo Verde, S. Tomé e Príncipe, Brasil, Venezuela e Colômbia
Authors: Nunes Naidea Nunes
Published: May 2019

A ilha da Madeira desempenhou um importante papel no desenvolvimento da produção açucareira, transplantada do Mediterrâneo para o Atlântico, e na transmissão desta cultura às ilhas atlânticas das Canárias, Cabo Verde, S. Tomé e Príncipe e ao Brasil. As Canárias também contribuíram para a expansão desta atividade ao outro lado do Atlântico, nomeadamente às Antilhas espanholas, à Venezuela e à Colômbia. O açúcar foi um dos primeiros produtos globais no comércio atlântico, promovendo trocas linguísticas e culturais entre as várias áreas açucareiras, sobretudo nas ilhas atlânticas e no novo mundo latino-americano. Por isso, hoje, temos uma terminologia açucareira comum aos dois lados do Atlântico, que importa conhecer, valorizar e salvaguardar.
O jogo mudou? Vinte anos de Ferréz e literatura marginal
Authors: Hernández-Romero Marissel
Published: May 2019

O artigo analisa a trajetória de Ferréz no contexto do movimento Literatura Marginal vinte anos após sua primeira publicação, a coletânea de poemas Fortaleza da desilusão (1997) até seu último romance Deus foi almoçar (2012). Este manuscrito é um diálogo com a crítica produzida nos vinte anos de aparição de Ferréz. Este artigo procura avaliar o impacto de Ferréz na produção literária brasileira contemporânea. O artigo apresenta uma discussão crítica para a compreensão do campo literário e cultural brasileiro na contemporaneidade. Atenção especial será dada ao personagem de Calixto, protagonista do romance Deus foi almoçar, como uma representação de outra forma de marginalidade como sugestão de que há uma continuação da característica marginal de Ferréz.