bluuebunny/crossref_metadata_2025 huggingface dataset:
Diagnóstico de cultura organizacional en los departamentos de talento y jurídico del gobierno autónomo descentralizado de Chone
Authors: Sabando Garcés Leticia Yanina
Published: April 2019

La investigación se realizó con el objetivo de diagnosticar la cultura organizacional en los departamentos de Talento Humano y Jurídico del Gobierno Autónomo Descentralizado de Chone, para desarrollar las capacidades y mejorar el desempeño de los servidores(as) públicos. Se fundamentó en caracterizar e identificar las falencias que amenazaban el desenvolvimiento profesional del personal de la institución, con esto se elaboró un plan de mejoras para fortalecer el trabajo en equipo, la toma de decisiones, la motivación y la relación entre jefes-subordinados y por ende entre departamentos. Con la aplicación de encuestas (test de Cameron y Quinn, Clima Organizacional y ¿A usted, qué lo motiva?) los autores obtuvieron datos a partir de un conjunto de preguntas dirigidas a los servidores(as) públicos permitiendo capturar con exactitud la realidad del problema facilitando contribuir con la propuesta de un plan de mejora que resuelva los inconvenientes en lo que respecta a la cultura organizacional.

 

Palabras clave: plan de mejoras, eficiencia, servidores (as) públicos
Promoción turística en una herramienta web para el Cantón Bolívar, Ecuador
Authors: Alfonso Alfonso Rodney , García Reinoso Nelson , Rodríguez Ortega Alisis
Published: April 2019

El presente trabajo tiene como objetivo general presentar un plan de promoción turística basado en un sitio web, para el cantón Bolívar en Ecuador. Se realiza un análisis previo de los fundamentos y metodologías bases del tema en estudio. El instrumento metodológico utilizado cuenta con tres fases, iniciando con un levantamiento de la información turística del plan promocional. Seguido a esto, se lleva a cabo el diseño de la herramienta promocional centrado en una página web y finalmente una fase dedicada al control y seguimiento de las acciones propuestas. Los aportes del trabajo radican en el beneficio práctico del plan de promoción para la actividad turística y comercial del cantón Bolívar. La página web realizada constituye una herramienta de fácil acceso a usuarios, prestatarios y actores involucrados en la presentación de: ofertas, actividades, opiniones, eventos, experiencias e imágenes fundamentalmente, que puede replicarse en otros cantones de la provincia de Manabí.

 

Palabras clave: turismo 2.0, promoción turística, sitio web, información turística.
Estudio de Organización del trabajo en la empresa de seguridad y protección Sncti Spiritus, Cuba
Authors: Esquivel García Renier , Álvarez Mayor José Antonio , March López Aracelio , Díaz Marín Alberto
Published: April 2019

Estudiar de forma integral la organización del trabajo en el sistema empresarial como parte de la gestión del capital humano, adquiere singular importancia en el aprovechamiento máximo de la utilización de la fuerza de trabajo y en la elevación de las capacidades instaladas en la producción de bienes y servicios, bajo el perfeccionamiento de sus condiciones técnicas y organizativas, así como en la determinación de los gastos de trabajo necesario con el propósito de incrementar la productividad del trabajo y la eficiencia. Para contribuir a lograr lo anterior se definió entre los objetivos diseñar e implementar un procedimiento para realizar estudios de organización del trabajo considerando cada uno de los elementos, en particular, la organización y servicio del puesto de trabajo, los métodos y procedimientos de trabajo y su medición. El procedimiento propuesto consta con un hilo conductor que muestra cada uno de los pasos a desarrollar hasta su culminación, destacándose dentro de estos, las técnicas evaluativas de realización de un diagnóstico para detectar los problemas y consecuentemente determinar las medidas a implantar para su solución y con impacto en la productividad, también se incluye el análisis del costo beneficio de la implantación del procedimiento en cuestión, para lo cual fue necesario realizar de manera previa un análisis de la literatura, que permitió apropiarse de conocimientos teóricos que contribuyeron a su profundización. Los resultados de su implementación demostraron su viabilidad en la realización de estudios de organización del trabajo.

 

Palabras clave: capital humano, organización del trabajo, productividad.
Percepción de los turistas sobre los servicios que ofrece Manta, un análisis previo al 16A
Authors: Arias Arias Ana Elena , Calderón Salazar Jorge , Loor Moreira Alexandra , Ramos Fausto Patricio
Published: April 2019

El presente trabajo de investigación analiza la percepción de los turistas y la calidad de los servicios que ofrece la ciudad de Manta a sus visitantes. En Ecuador el turismo está alcanzando niveles altos de crecimiento que constituyen el tercer rubro de ingreso para la economía del país. Manta es una ciudad declarada Municipio turístico desde 1999, en el 2013 recibió más de 600.000 visitantes, mientras que en 2014 la cifra bajó en aproximadamente un 10% y en 2015 superó el número de 2013, por ello la realización de este estudio cobra importancia para determinar la percepción sobre los servicios que ofrece y que le hace falta a la ciudad para potenciarla y ubicarla entre uno de los mejores destinos de la costa del Pacífico Sur.

 

Palabras clave: percepción, turistas, calidad de los servicios, destinos
Propuesta de un programa de auditoría a los sistemas de información
Authors: Negrin Sosa Ernesto , López García Laureano , Rodríguez Cabrera Karina , Martínez Guerra Daysel
Published: April 2019

Los cambios que ocurren actualmente a nivel mundial, tales como los avances económicos, tecnológicos y las crecientes exigencias de los servicios que prestarán las organizaciones que ejercen la auditoría hacen que se necesiten cada vez más herramientas de apoyo específicas para evaluar los sistemas de información en general. En este contexto se plantea como objetivo general de esta investigación proponer un programa de auditoría a los sistemas de información adecuado a las características del sistema empresarial cubano que permita el desarrollo efectivo de acciones de control de este tipo, ya que existen limitadas experiencias en este ámbito y generalmente con poco nivel de integración. Para su elaboración se utilizaron diferentes técnicas y herramientas tales como el diagrama causa-efecto, técnicas de auditoría y método de expertos, este último por la imperiosa necesidad de considerar la experiencia acumulada de auditores e informáticos.

Palabras clave: auditoría, programas, sistemas de información.

 

ABSTRACT 

 

The current global changes, such as economic and technological developments and the increasing requirements of the services provided by the organizations that perform the audit, mean that more and more specific support tools are needed to evaluate the information systems in general. In this context, it is proposed as a general objective of this research to propose an audit program to the information systems appropriate to the characteristics of the Cuban business system that allows the effective development of control actions of this type, since there are limited experiences in this area and generally with little level of integration. Different techniques and tools, such as the cause-effect diagram, audit techniques and expert method, were used to elaborate the latter due to the imperative need to consider the accumulated experience of auditors and computer scientists.

 

Key words: audit, programs, information systems.
Impacto de la gestión administrativa sobre la eficiencia de la actividad pesquera artesanal - cantón Manta
Authors: Lara Ocaña Juan Carlos
Published: April 2019

El objetivo general del estudio fue demostrar que la Gestión Administrativa de los armadores, influye en la eficiencia de la actividad pesquera artesanal del Cantón Manta-Manabí-Ecuador. Para el logro del mismo se desarrolló un proceso investigativo sustentado en una estrategia metodológica cuantitativa analítica, con diseño de investigación no experimental, transversal y correlacional causal. Para recolectar los datos se empleó un cuestionario único mediante la técnica de encuesta, cuya estructura responde a la operacionalización de las variables en estudio. La validez y confiabilidad del cuestionario fueron analizadas estadísticamente mediante prueba binomial y coeficiente Alfa de Cronbach, quedando demostrada su validez y una alta confianza con Rho de 0,993. Los principales resultados obtenidos en la investigación evidencian que existe una correlación positiva de muy fuerte a perfecta entre la gestión administrativa, así como cada una de las dimensiones que la componen y la eficiencia de la actividad pesquera artesanal del Cantón Manta.

Palabras clave: gestión administrativa, eficiencia, productividad, calidad, pesca artesanal.

 

ABSTRACT 

 

The general objective of the study was to demonstrate that the Shipowners’Administrative Management  influences the  efficiency of  the  Artisanal  fishing  activity  of  Canton Manta-Manabí-Ecuador. To achieve this, a research process was developed based on a quantitative analytical methodological strategy, with non-experimental, transverse and causal correlational research design. To collect the data, a single test was used by the survey technique, whose structure responds to the operationalization of the variables under study. The validity and reliability of the questionnaire were statistically analyzed using binomial test and Cronbach’s alpha coefficient, showing its validity and a high confidence with Rho of 0.993. The main results obtained in the research evidenced that there is a positive correlation between very strong and perfect between the administrative management, as well as each of the dimensions that compose it and the efficiency of the artisanal fishing activity of Canton Manta.

 

Key words: administrative  management,  efficiency, productivity,  quality,  artisanal fishing.
Inequidad y pobreza en América Latina. Particularidades
Authors: Plaza Macías Nila , Medina Valdès Zoe
Published: April 2019

En los últimos decenios la pobreza y la inequidad se han convertido en centro de atención de académicos, instituciones internacionales, y gobiernos nacionales. Existe un debate internacional desde diferentes posiciones teóricas e ideológicas en el que se visualiza un consenso sobre la necesidad de enfrentar la pobreza -extrema-, pero no las causas que la generan. América Latina ha logrado disminuir sus altos niveles de pobreza, pero continúa siendo la región más inequitativa del planeta. Este trabajo tiene como objetivo valorar las ideas contemporáneas sobre la pobreza y la inequidad, así como analizar la experiencia ecuatoriana. Entre los resultados fundamentales está la sistematización de las principales ideas cepalinas sobre el tema y sus propuestas de políticas, así como las lecciones extraídas de la experiencia de Ecuador, país que muestra avances notables al respecto.

Palabras clave: equidad, desigualdad, riqueza y distribución, CEPAL

 

ABSTRACT

In recent decades, poverty and inequity have become the focus of scholars, international institutions, and national governments. There is an international debate from different theoretical and ideological positions. There is a consensus on the need to tackle- extreme - poverty but not the causes that generate it. Latin America, has managed to reduce its high levels of poverty, but continues to be the most inequitable region on the planet. This work aims to value contemporary ideas about poverty and inequity, as well as analyze the Ecuadorian experience. Among the fundamental results is the systematization of the main ECLAC ideas on the subject and its policy proposals, as well as the lessons learned from the experience of Ecuador, a country that shows remarkable progress in this regard. 

Key words: equity, inequality, wealth and distribution, ECLAC
El desarrollo local del cantón Manta y sus conexiones con el plan nacional para el buen vivir en Ecuador
Authors: Sabando Garcés Medardo , Pérez Soto Olga , Odriozola Guitart Silvia
Published: April 2019

Uno de los retos que actualmente enfrenta la humanidad al inicio del tercer milenio, son los cambios que deben operar los territorios en función de sus estrategias de desarrollo local, en el contexto de la globalización y el surgimiento de nuevas demandas vinculadas con el bienestar social y el cuidado del medio ambiente. En este propósito, constituye objetivo del presente artículo valorar los aspectos del desarrollo local del Cantón Manta en correspondencia con el Plan Nacional para el Buen Vivir en Ecuador, analizando para ello, la base conceptual que, acompañada de una metodología estadística, defina y mida los aspectos subyacentes del desarrollo socio-económico como proceso multidimensional y complejo. La metodología empleada, responde a métodos tanto teóricos como empíricos, permitiendo estructurar la investigación y presentar los resultados respecto al nivel de correspondencia entre el desarrollo local del Cantón Manta y el Plan Nacional de Desarrollo Ecuatoriano.

Palabras clave: renta diferencial, burguesía, terratenientes, propiedad parcelaria, economía social y solidaria.
La comercialización de la pesca incidental del tiburón realizada por los pescadores artesanales de Manta
Authors: Cevallos Zambrano Doris Patricia , Menéndez Delgado Erick Rodolfo
Published: April 2019

En la ciudad de Manta - Ecuador, la pesca artesanal representa una fuente de alimentos importante y es un motor comercial para los habitantes de la ciudad, quienes se vinculan en gran número a esta actividad. El presente análisis permite conocer la cadena de comercialización que utilizan los pesadores artesanales de esta ciudad para llevar los productos derivados de la captura incidental del tiburón, hasta el consumidor final; así como el impacto que tienen en el incremento de sus ingresos finales. Para alcanzar el objetivo primario, se procedió con la aplicación de encuestas a una muestra del universo de pescadores artesanales registrados en Manta, que permitío conocer el estado de la venta de escualos, las estrategias de comercialización que utilizan y datos estadísticos de la captura de la especie. Una vez recolectados los datos se realizó el análisis de los mismos aplicando un procedimiento cuali-cuantitativo de investigación. Los resultados más importantes evidenciaron que la pesca de todas las partes del escualo(pez) se comercializa fresca en el lugar de desembarque utilizando intermediarios para el efecto, lo que resta posibilidades de generar mejores ganancias ya que las mismas son trasferiadas a los eslabones de la cadena comerccial que utilizan.

Palabras clave: tiburón, mercado, ingresos, ganancia, pesca artesanal
Infocentros: Una estrategia social, científica y tecnológica en acción en los servicios públicos del Ecuador
Authors: Yaulema Zavala Olger Javier , Lucio Mancheno Tatiana , Blanco Encinosa Lázaro
Published: April 2019

Se analiza de manera preliminar una “Sociedad en Red”, que destaca un nuevo paradigma social en el que la alianza entre el conocimiento y la información, ocupa un lugar muy importante en los sistemas de producción y comunicación, impulsadas por un componente dominante, denominado “redes digitales”, que permiten incrementar el movimiento de información. Fundamentalmente se analizan las principales incidencias de los infocentros en los servicios públicos de Ecuador, desde varias perspectivas sobre la práctica tecnológica.

 

Palabras clave: Gobierno Electrónico, Tecnologías de Información y Comunicación, Interoperabilidad

ABSTRACT

It had been analyzed a new social paradigm (Digital network society), in which the alliance between knowledge and information occupies a very important place in the production and communication systems, a key component called digital networks, that allow to increase the movement of data-driven analyses preliminarily. Also discusses the major incidences of the infocenters in the public services of Ecuador, from various perspective on technological practice.

 

Key words: E-government, information and communication technologies, interoperability
Reflexiones sobre el concepto de problema matemático
Authors: Pérez Ariza Karel , Álvarez García Ernesto , Breña Rivero Carlos
Published: April 2019

El concepto de problema matemático constituye una categoría central para la didáctica de la matemática. Su definición ha sido interés de diversos autores, aunque aún es un aspecto polémico dentro del quehacer investigativo de los especialistas. En las referidas definiciones se aprecia un mayor énfasis en los rasgos estructurales externos de los problemas, lo que ha generado que las mismas tengan un marcado carácter descriptivo en detrimento de su función explicativa. La situación descripta afecta la comprensión de la esencia de dicho objeto de estudio y por tanto la dirección de su proceso de enseñanza-aprendizaje. Por lo anteriormente expuesto en el artículo se persigue el objetivo de reflexionar sobre el concepto de problema matemático. El empleo de métodos teóricos, tales como: el analítico – sintético, el inductivo – deductivo y el histórico–lógico permitieron develar las tendencias predominantes en la definición del concepto objeto de estudio y realizar una redefinición del mismo.   

Palabras clave: problema matemático, solución de problemas, Didáctica de la Matemática 

Abstract:

The concept of mathematical problem constitutes a central category for the Didactics of the Mathematical one. To grief that the same one has been defined by diverse authors, not yet consensus among them exists. In the referred definitions each author has emphasized in particular elements, which has generated that the same ones have a noticeable descriptive character. The situation deciphers affects the understanding of the essence of this object of study and therefore the direction of its process of teaching - learning. By previously exposed in the article the objective is persecuted to reflect about the concept of mathematical problem. The use of theoretical methods, such as: analytical  – the synthetic one, inductive  – deductive and historical  – logical one allowed to reveal the predominant tendencies in the definition of the concept study object and to make a redefinition of the same one.

Key words: mathematical problem, problem solving and Didactic of Mathematics
Solución analítica al problema no homogéneo del látigo
Authors: Sabas Juan , Cedeño Glay , García Víctor , Cobacango Luis , Moreano Willam , Guanoluiza José , Veliz Jofre , Zambrano Luis , Vélez Maritza
Published: April 2019

Debido a la complejidad del método de solución de superposición de ondas, encontrar soluciones analíticas en las ecuaciones diferenciales parciales se hace complicado. En este artículo presentamos un método teórico de solución al problema general de propagación unidimensional de ondas  que permiten dividir el problema  en otros de menor complejidad. Aplicando el método de separación de variables de Fourier y la Transformada de Laplace se obtiene detalladamente la solución analítica al problema no homogéneo del látigo.

Palabras clave: Ecuación de onda, Transformada de Laplace, Solución analítica.

ABSTRACT:

Because of the complexity of the wave overlay solution method, finding analytical solutions in partial differential equations becomes complicated. In this article we present a theoretical method of solution to the general problem of unidimensional propagation of waves which allows the division of the problem into other smaller complexities. Applying the Fourier method of separation of variables and the Laplace transform gives the analytical solution to the non-homogeneous problem of the whip

Key words: wave equation, analytical solution, Laplace Transform.
Reflexiones sobre o ensino da física moderna no ensino médio
Authors: Silva Romualdo
Published: April 2019

Esta nota tem como objetivo enfatizar algumas reflexões sobre o ensino da Física Moderna no Ensino Médio, com o intuito de mostrar aos alunos e professores possíveis caminhos a serem seguidos, para que a sua aprendizagem  da Física Moderna seja potencialmente significativa.

Palavras-chave: Reflexões, física moderna, ensino médio.

ABSTRACT:

This note aims to emphasize some reflections on the teaching of Modern Physics in High School, with the intention of showing students and teachers possible paths to be followed, so that their learning of Modern Physics is potentially significant.

Key words: Reflections, modern physics, high school.
Extracción de quitina utilizando ácido láctico
Authors: Colina Rincón Marinela Nazareth , Medina Robles Karen Dianne , Vargas Colina José Alejandro , Rincón Prieto Dianela Isabel , Arismendi Rossana , Montilla Brinolfo
Published: April 2019

RESUMEN

En este trabajo, se evaluó la extracción de quitina a partir de desechos de crustáceos involucrando la fermentación láctica generando ácido láctico para la  desproteinización y desmineralización del material, usando suero de leche y azúcar como sustrato y fuente de carbono, por un periodo de 2 y 3 semanas a temperatura ambiente. Los resultados mostraron que la concentración óptima de azúcar para la extracción de quitina de un 10% m/v, evidenciando un descenso del pH y consecuente aumento de la acidez total titulable. Al incrementar el tiempo de fermentación de 2 a 3 semanas, los procesos de desmineralización y desproteinización mejoraron dando como resultado un porcentaje de ceniza de 2,68% el cual indica una buena remoción de minerales presentes en los desechos de crustáceos. Además, el porcentaje de remoción resultó de un 96,62% para el magnesio (Mg2+), 95,62% de potasio (K+) y 92,82% de calcio (Ca2+). El espectro de FTIR mostró las bandas de los grupos funcionales característicos de la quitina.

Palabras clave: Desechos de crustáceos, quitina, azúcar, suero de leche, fermentación.

ABSTRACT

In this work, the extraction of chitin from crustacean waste involving lactic acid fermentation was studied, this generating lactic acid as product of deproteinization and demineralization of the material. Milk serum and sugar as substrate and carbon source were used, for a period of 2 y 3 weeks at room temperature. The results showed that the optimal sugar concentration for chitin extraction was 10% m/v, evidencing a decrease in pH and a consequent increase in titratable total acidity, by increasing the fermentation time of 2 to 3 weeks. The results were better with a percentage of ash of 2.68%, indicating a good removal of minerals present in crustacean wastes. In addition, the percentage of removal resulted in a 96.62%, the rate of removal for magnesium (Mg2+), 95.62% potassium (K+) and 92.82% of calcium (Ca2+). The FTIR spectrum revealed the bands from the functional groups that characterize chitin.

Key words: Crustacean wastes, Chitin, Sugar, Buttermilk, fermentation.
EURISTIC INSTRUCTION FOR WAVE EQUATION PROBLEM-SOLVING USING VARIABLE SEPARATION METHOD
Authors: Alvarez Alvarado Manuel , Vaca Urbano Fernando
Published: April 2019

This study focuses on heuristic instruction as a method of logical thought processes. The objective is to raise and establish a framework for problem-solving in the application of separation of variables for the wave equation. This leads to a simple and easy pathway to make the topic at a manageable level for the students.  This paper proposes a base problem, over which the heuristic instruction is applied. Eventually, the result is the determination of a system that allows a simple approach to avoid difficulties in solving problems in which the separation of variables in the equation of the wave is employed. In order to determine the impact of heuristic in students learning gain, two groups of 20 students each (experimental and control) were subject to a pre- and post-test. To the control group, the scheme proposed was not employed. In contrast to the experimental the proposed approach was employed. The results reveal that the heuristic scheme for wave equation problem-solving has a significant impact on students’ learning process.

Key words: Physics, Heuristic Instruction, Differential Equations, Wave Equation.
METABOLITOS SECUNDARIOS EN PLANTAS MEDICINALES USADAS PARA PROBLEMAS GASTROINTESTINALES. UNA REVISIÓN SOBRE MEDICINA ANCESTRAL ECUATORIANA
Authors: Ruiz Reyes Enrique , Moreira Castro Juan Manuel
Published: April 2019

En este artículo se realiza una revisión de los principales metabolitos secundarios que se encuentran en las familias de plantas medicinales Lamiaceae, Asteraceae, Plantaginaceae, Rutaceae, Zingiberaceae, Fabaceae, Poaceae. En ellas se encuentran una variedad de flavonoides que contribuyen a la actividad antioxidante, la cual juega un papel importante en el tratamiento de las enfermedades gastrointestinales. Además, se hace una breve revisión de los estudios etnobotánicos de plantas medicinales publicados en el Ecuador.

Palabras clave: Plantas medicinales, desórdenes gastrointestinales, metabolitos secundarios, flavonoides, actividad antioxidante.
Números primos; método gráfico de la conjetura de GOLDBACH
Authors: Intriago Delgado Yandry
Published: April 2019

Mediante el uso de Microsoft Excel el siguiente trabajo examina las tablas de multiplicar desde una perspectiva distinta, con un método sencillo para encontrar la secuencia de los números primos en la línea continua de los números naturales , y así luego se identifican gráficamente los números que cumplen con la Conjetura de Goldbach, al realizar una triangulación con líneas que unen la series de los  y ; siendo la notación: el cuadrado de los números naturales. A continuación, se trazan diagonales paralelas a las sucesiones y únicamente en cada elemento primo  de la línea de los  y así se obtienen intersecciones que cumplen con la conjetura fuerte de Goldbach. Se aplican   fórmulas para calcular el número mínimo de intersecciones que se generan en un conjunto de los  consecutivos. Así mismo, para obtener la conjetura débil de Goldbach, se puede usar el gráfico ya antes mencionado, y se emplean fórmulas combinatorias. Este método permite identificar el intervalo de afectación que tiene un elemento primo en la secuencia de los naturales y modelar una línea continua, que revela un gráfico similar al que se conoce como cometa de Goldbach.

Palabras clave: Gráfico, números primos, conjetura de Goldbach.

ABSTRACT

By the use of Microsoft Excel the following work examines the multiplication tables from a different perspective, with a simple method to find the sequence of the prime numbers in the continuous line of the natural numbers ( ), and then we can graphically identify the numbers that comply with the Goldbach Conjecture, when making a triangulation with lines that join the series of the  and , in this article the notation:  is the square of the natural numbers. Next, diagonals are drawn parallel to the sequence  and  only in each prime element  of the line of the  and thus intersections are obtained that meet the strong conjecture of Goldbach. Formulas are applied to calculate the minimum number of intersections that are generated in a set of consecutive . Likewise, to obtain the weak Goldbach conjecture, the aforementioned graph can be used, and combinatorial formulas are used. This method serves to identify the range of affectation that a prime element has in the sequence of the natural numbers, and to model a continuous line, which reveals a graph similar to what is known as Goldbach's comet.

Key words: Graph, prime numbers, Goldbach conjecture.
Conjetura de GOLDBACH, números naturales y teorema de números primos
Authors: Intriago Delgado Yandry Marcelo
Published: April 2019

Mediante el uso de Geogebra en el siguiente manuscrito se realiza un análisis de la conjetura de Goldbach, posteriormente se comprueba mediante expresiones algebraicas que siempre existe una cantidad mínima de elementos primos que hacen que se cumpla la conjetura para cualquier número natural par . Se toma en consideración el gráfico que es generado mediante el Método Gráfico de la Conjetura de Goldbach, en el que se examinan cada una de las variables que intervienen en el eje de las ordenadas y las abscisas. Luego de esto, se estudian ciertos números pares conocidos en los que se sabe la cantidad de primos existentes, posteriormente se separa a cualquier número  en intervalos  desde 1 a  y desde N hasta , encontrando así que la cantidad de primos en el primer intervalo mencionado es superior a la cantidad de elementos primos del segundo, con estos resultados y el análisis realizado a la gráfica del Método Gráfico antes mencionado, se llega  a la conclusión que la distribución de los primos está relacionada con la función logaritmo natural; tal como está expresado en el Teorema de los Números Primos , pero en este caso; con una ligera variante para cada uno de los intervalos antes mencionados. Se realiza posteriormente un análisis de probabilidad que comprueba que la cantidad de intersecciones que se producen está intrínsecamente relacionada con las funciones que limitan la cantidad de elementos primos, que esto a su vez también se relaciona con la función  propuesta por Gauss.

 

Palabras clave: Conjetura Goldbach, Teorema, números primos.

 

Abstract:

By using Geogebra in the following manuscript, an analysis of the Goldbach conjecture is made. It has been verified through algebraic expressions that there is always a minimum amount of prime elements that make the conjecture for any natural pair number . The graph that is generated by the Graphical Method of the Goldbach Conjecture is taken into consideration, in which the variables that intervene in the axis of the ordinates and the abscissas are examined. After this, certain known even numbers were studied which the number of existing prime numbers is known. Later, it is separated from any  number in intervals from 1 to  and from N to , thus, finding the prime numbers in the first one. The aforementioned interval is greater than the number of prime elements of the second, with these results and the analysis made to the graph of the aforementioned Graphic Method, it is concluded that the distribution of the primes is related to the natural logarithm function; as it is expressed in the Theorem of the Prime Numbers, but in this case with a slight variant for each of the aforementioned intervals. A probability analysis to verify that the number of intersections that occur is intrinsically related to the function that limits the number of prime elements was performed. This is also related to the function  proposed by Gauss.

 

Key words: Goldbach conjecture, Prime number, theorem.
Cystotoperitoneal shunt surgery during infancy in porencepahalic cyst located in frontal region led to regaining of developmental milestone
Authors: Satyarthee Guru Dutta , Moscote-Salazar Luis Rafael , Agrawal Amit
Published: April 2019

Porencepahalic cyst is considered as an extremely uncommon developmental disorder of the central nervous system, being characterized by the presence of a fluid-filled cysts or cavities located within the cerebral hemispheres. It can be associated with varied aetiology and can present with a spectrum of clinical presentation varying from asymptomatic to grossly spastic limbs, mental retardation, cognitive impairment and intractable seizure. Extensive Pubmed and Medline search did not yield any result when searched for term “infancy, porencepahalic cyst, cystoperitonreal shunt.” However, clear guideline for management is still lacking. Authors report an interesting case of giant porencepahalic cyst located in the right frontal region in infancy and underwent cystoperitonreal shunt surgery, which lead to good outcome with remarkable recovery of delayed milestones with adequate scholastic performances along with marked diminution in the size of porencepahalic cyst.
Toddler with repeated fall frequently visiting hospital presented with acute subdural hematoma on readmission with ultra-rapid evolution: surgical management strategy
Authors: Satyarthee Guru Dutta
Published: April 2019

Repetitive fall producing head injury in children may lead to development of intracranial hematoma. The course of evolution may be rapid in case of repeated fall due to induction of sub-clinical coagulopathy caused by repetitive cranial injury. The awareness of such possibility is highly desired among the pediatrician and neurosurgeon and emergency team and quick diagnosis and pertinent imaging study is of immense value and appropriate surgical management for prompt and expediting the evacuation of intracranial hematoma evacuation should be attempted to preserve good neurological outcome. Authors reports a case, who had rapid neurological worsening, managed surgically with good neurological outcome, further various surgical management options along with pertinent literature are briefly reviewed.
Dividual Turn: A Comparative Study of the Worldviews of the Japanese and the Melanesian Folks
Authors: Mikado Naruhiko
Published: April 2019

This study has three aims: the first is to illuminate the transformation in the minds of the Japanese people after the catastrophic earthquake in 2011—namely, the collective movement to reappraise the worth of bonds and connections between/among people. The second is to show that the ongoing spiritual change has a number of similarities with the worldview of the Melanesian folk which Marilyn Strathern analysed with the concept of “dividual”. The third is to generalize diverse insights which the two cases suggest and thus to seek a fresh way to see people and those relations which bridge over them. The argument begins with a discussion to prove the point of the first aim, then the second, and, after referring to what is not dealt with for future research, concludes by demonstrating that of the third. The contribution which this study will make for interdisciplinary scholarship is that it attests a literary text and an anthropological study can be employed to derive a philosophical discourse.
Advocating Personal Learning Environment (PLE) in Scientific Writing: Is Digital Tool More Powerful?
Authors: Wisudawati Athi Fauzani
Published: April 2019

Personal learning environment (PLE) connects the formal and informal learning of the learners by utilizing both digital and non-digital tools. This concept is believed to be able to support the process of learning Scientific Writing because to construct an article is not enough relying on formal learning and a single tool provider. This paper reports the implementation as well as the tools used and impact of getting engaged in PLE for learning Scientific Writing. The research was conducted qualitatively in narrative inquiry analysis while the data was collected through observation, questionnaire and in-depth interview. The participant was a graduate student majoring English Education department having experienced making a scientific journal. The learner admitted that collaborating both digital and non-digital tools is very meaningful, however the use of digital tools apparently more efficient as supported by Reinders (2014) to support different aspects of the learning process. This study is beneficial for ELT classroom, specifically for academic writing class where Scientific Writing is one of mandatory subject being taught by the lecturer. The tools revealed in the finding can be references for EFL learners to be applied in constructing Scientific Writing.
Cultural Shock Among African Students in Indonesia
Authors: Mihayo Astelia
Published: April 2019

This paper explores cultural shock experiences encountered by African students studying in Indonesian Universities. The study used qualitative approach to collect data through in-depth face-to-face interviews with African students and participant observation. The findings of the study reveal that many African students had experienced unfamiliar situation that are different from those of their home countries in the course of study in Indonesia. Such situation leads to what is called “culture shock”, which includes new academic life, culture fatigue, language barrier and food outlets. The study has shown that most of the stress had a profound impact on shaping their acculturation and living in Indonesia. The study adds knowledge to literature, particularly on generating ideas for better management of culture shock in an alien environment. Accordingly, the study recommends that before embarking to abroad for education, it is very important to understand the mechanism and consequences of study abroad and shape our knowledge of how these experience function worldwide and students should develop positive attitudes in order to ease their adjustment to an alien culture and setting.
O Brasil nas Obras de Pero Gândavo e Richard Hakluyt
Authors: Batista Bianca , Montez Luiz
Published: April 2019

This study’s aim is to analyze the discursive construction of Brazil in the chronicle of Pero Gândavo, História da Província Santa Cruz que Vulgarmente Chamamos Brasil (1576) and in the travel collection of Richard Hakluyt, The Principal Navigations, Voyages and Trafqques of the English Nation (1589-1600). Printed books played a crucial role during the sixteenth century once the editors built a history of the new-found lands in accordance with their reigns’ economic and ideological interests. For Gândavo, the chronicle assured the Portuguese possession over Brazil whereas for Richard Hakluyt, the travel collection denied Iberians’ kings sovereignty over the New World and extolled the English maritime enterprise in the Americas, especially in the lands not effectively colonized by the Iberians. We suggest that the printed book was a stage in which the European countries struggled
for the riches of Americas.
A Comparison of Word-Recognition Performances on the Auditec and VA Recorded Versions of Northwestern University Auditory Test No. 6 by Young Listeners with Normal Hearing and by Older Listeners with Sensorineural Hearing Loss Using a Randomized Presentation-Level Paradigm
Authors: Wilson Richard H.
Published: April 2019

Background:The Auditec of St. Louis and the Department of Veterans Affairs (VA) recorded versions of the Northwestern University Auditory Test No. 6 (NU-6) are in common usage. Data on young adults with normal hearing for pure tones (YNH) demonstrate equal recognition performances
on the two versions when the VA version is presented 5 dB higher but similar data on older listeners with sensorineural hearing loss (OHL) are lacking.Purpose:To compare word-recognition performances on the Auditec and VA versions of NU-6 presented at six presentation levels with YNH
and OHL listeners.Research Design:A quasi-experimental, repeated-measures design was used.Study Sample:Twelve YNH (M = 24.0 years; PTA = 9.9-dB HL) and 36 OHL listeners (M = 71.6 years; PTA = 26.7-dB HL) participated in three, one-hour sessions.Data Collection
and Analyses:Each listener received 100 stimulus words that were randomized by 6 presentation levels for each of two speakers (YNH, −2 to 28-dB SL; OHL, −2 to 38-dB SL). The sessions were limited to 25 practice and 400 experimental words. Digital versions of the 16, 25-word
tracks for each session were alternated between speakers.Results:Each of the 48 listeners had higher recognition performances on the Auditec version of NU-6 than on the VA version. The respective overall recognition performances on the Auditec and VA versions were 71.4% and 64.1% (YNH)
and 68.7% and 58.2% (OHL). At the highest presentation levels, recognition performances on the two versions differed by only 0.5% (YNH) and 3.3% (OHL). At the 50% correct point, performances on the Auditec version were 3.2 dB (YNH) and 6.1 dB (OHL) better than those on the VA version. The
slopes at the 50% points on the mean functions for both speakers were about 4.9%/dB (YNH) and 3.0%/dB (OHL); however, the slopes evaluated from the individual listener data were steeper, 5.2 to 5.3%/dB (YNH) and 3.3 to 3.5%/dB (OHL). When the individual data were transformed from dB SL to
dB HL, the differences between the two listener groups were emphasized. The four functions (2 speakers by 2 listener groups) were plotted for each of the 48 participants and each of the 200 words, which revealed the gamut of relations among the datasets. Examination of the data for each speaker
across test sessions, in the traditional 50-word lists, and in the typically used 25-word lists of Randomization A revealed no differences of clinical concern. Finally, introspective reports from the listeners revealed that 91.7% and 83.3% of the YNH and OHL listeners, respectively, thought
the Auditec speaker was easier to understand than the VA speaker. Recognition performances on each participant and on each word are presented.
LINKING CULTURAL INTELLIGENCE AND ADAPTIVE PERFORMANCE: DO INTERCULTURAL INTERACTIONS AND HOST UNIVERSITY SUPPORT™ PLAY IMPORTANT ROLES?
Authors: Suharti Lieli , Handoko Yohanes Andreanto , Huruta Andrian Dolfriandra
Published: April 2019

Purpose: As the globalization has changed the working environment, organizations need more adaptable individuals who have the abilities to work effectively, deal with unpredictable work situations, and adapt to diverse social contexts. Individuals’ international experience such as being enrolled in a study exchange program has been extensively examined as predictors of adaptive performance. In contrast, the role of cultural intelligence in promoting adaptive performance and the quality of experience itself has been overlooked. This study examined the moderating role of host university support in terms of the relationship between intercultural interactions and cultural intelligence towards adaptive performance. Research Methodology: This study tested its hypothesis with primary data from a sample of 123 university students who have the experience of going abroad as student exchange participants. The primary data was gathered through the structured questionnaires which were sent to the respon-dents through e-mail, messenger, and social media. The Statistical Package for Social Science (SPSS) 20 for Windows was used to analyze the data. Findings: The regression analysis demonstrated that cultural intelligence, together with intercultural interactions and host university support, was an important predictor of adaptive performance. Research Limitations: All of the data in this study were collected through internet or e-mail which has limited control towards the respondents’ answers. Further, this study did not really consider the respondents’ scope as we welcome everyone who has the experience of joining a study exchange program to participate in this research. Practical Implications: The findings suggested the importance of cultural intelligence as a critical predictor of adaptive performance in multicultural contexts, as well as the host university support and intercultural interaction roles for the development of an individual’s cultural intelligence. Originality/Value: This study complemented the previous assumption on universities’ crucial role in educating and preparing the students to be a part of the global citizens.
νbhlight: Radiation GRMHD for Neutrino-driven Accretion Flows
Authors: Miller Jonah M. , Ryan Ben. R. , Dolence Joshua C.
Published: April 2019

The 2017 detection of the in-spiral and merger of two neutron stars was a landmark discovery in astrophysics. We now know that such mergers are central engines of short gamma-ray bursts and sites of r-process nucleosynthesis, where the heaviest elements in our universe are formed. In the coming years, we expect many more such mergers. Modeling such systems presents a significant computational challenge along with the observational one. To meet this challenge, we present

, a scheme for solving general relativistic magnetohydrodynamics with energy-dependent neutrino transport in full (3 + 1) dimensions, facilitated by Monte Carlo methods. We present a suite of tests demonstrating the accuracy, efficacy, and necessity of our scheme. We demonstrate the potential of our scheme by running a sample calculation in a domain of interest—the dynamics and composition of the accretion disk formed by a binary neutron star merger.
Revisiting the Biological Ramifications of Variations in Earth’s Magnetic Field
Authors: Lingam Manasvi
Published: April 2019

An Earth-like planetary magnetic field has been widely invoked as a requirement for habitability as it purportedly mitigates the fluxes of ionizing radiation reaching the surface and the escape of neutrals and ions from the atmosphere. Recent paleomagnetic evidence indicates that the nucleation of Earth’s inner core, followed perhaps by an increase in geomagnetic field strength, might have occurred close to the Edicarian period. Motivated by this putative discovery, we explore the ensuing ramifications from the growth or reversals of Earth’s dynamo. By reviewing and synthesizing emerging quantitative models, it is proposed that neither the biological radiation dose rates nor the atmospheric escape rates would vary by more than a factor of ∼2 under these circumstances. Hence, we suggest that hypotheses seeking to explain the Cambrian radiation or mass extinctions via changes in Earth’s magnetic field intensity are potentially unlikely. We also briefly discuss how variations in the planetary magnetic field may have impacted early Mars and could influence exoplanets orbiting M-dwarfs.
A database of threat statuses and life-history traits of Red List species in Flanders (northern Belgium)
Authors: Maes Dirk , Brosens Dimitri , T’jollyn Filiep , Desmet Peter , Piesschaert Frederic , Van Hoey Stijn , Adriaens Tim , Dekoninck Wouter , Devos Koen , Lock Koen , Onkelinx Thierry , Packet Jo , Speybroeck Jeroen , Thomaes Arno , Van Den Berge Koen , Van Landuyt Wouter , Verreycken Hugo
Published: April 2019

Red Lists estimate the extinction risk of species at global or regional levels and are important instruments in conservation policies. Global Red List assessments are readily available via the IUCN website (https://www.iucnredlist.org) and are regularly updated by (taxonomic) experts. Regional Red Lists, however, are not always easy to find and often use local criteria to assess the local extinction risk of species.

Here, we publish a database with the outcome of 38 Red List assessments in Flanders (northern Belgium) between 1994 and 2018. In total, the database contains 6,224 records of 5,039 unique taxa pertaining to 24 different taxonomic groups. Using a quality control procedure, we evaluated the criteria used, the number of records, the temporal and spatial distribution of the data and the up-to-dateness of the Red Lists. This way, nineteen Red Lists were approved as being of sufficient high quality (i.e. validated) and nineteen others were not. Once validated, Red Lists are approved by the regional Minister of Environment and published in the Belgian Official Gazette acquiring legal status. For the validated Red Lists, we additionally compiled (life-history) traits that are applicable to a wide variety of species groups (taxonomic kingdom, environment, biotope, nutrient level, dispersal capacity, lifespan and cuddliness). The publication of this dataset allows comparison of Red List statuses with other European regions and countries and permits analyses about how certain (life-history) traits can explain the Red List status of species. The dataset will be regularly updated by adding new Red List (re)assessments and/or additional (life-history) traits.
Two new species and new records of Neanuridae (Hexapoda: Collembola) from Brazilian central Amazonia
Authors: Neves Ana Carolina , Mendonça Maria Cleide , Queiroz Gabriel
Published: April 2019

Two new species of Neanuridae from the Amazon Rainforest of Northern Brazil are described and illustrated. The new speciesFrieseamulticlavatasp. nov. (holotype male in MNRJ: Brazil, Amazonas State) belongs to the reducta-group and represents the first record of Frieseinae for Amazonas State in Brazil. Within Pseudachorutinae, the new speciesFurculanuridaboiunasp. nov. (holotype male in MNRJ: Brazil, Amazonas State) represents the third species of this genus without eyes and body pigment, together withFurculanuridaafricana(Massoud, 1963) – type species of the genus – andFurculanuridaemucronataZon et al., 2014, both from Ivory Coast, in Africa. Lastly, an indefinite species ofEctonurasp. (Neanurinae) is the second record of the genus for the Neotropical Region.