bluuebunny/crossref_metadata_2025 huggingface dataset:
Der verheißungsvolle Kontext und seine Leistungen bei der Erschließung von Wortbedeutungen
Authors: Haß Ulrike
Published: August 2018

The paper addresses the problems learners (L1) have to encounter while deducing word meaning from a given (written) context. The first part presents a theoretical model of context for that purpose. The main parts show the results of two approaches: First, a typical text from a schoolbook is examined to point out the principal potential of a text to deduce the meanings of words unknown to the reader. The second approach presents the results of an empirical study with more than 400 students, who were asked to mark unknown words and helpful context elements in a given text. The results of both approaches point at major and minor strategies of readers when looking for explanations of word meanings. Finally, a typical context seems to be much less helpful than teachers lean on.
An Innovative Experimental Setup for Characterizing Friction Fatigue during Cyclic Jacking of Piles in Dense Sand
Authors: Zhang Zitao , Wang Yu-Hsing
Published: August 2018

In this study, an innovative experimental setup for model pile tests was developed to characterize friction fatigue in sand during cyclic jacking. In the experimental setup, a high-performance precision electric linear actuator was used to control jacking of the model piles. P-wave tomographic imaging was used to characterize the associated changes in the distribution of the P-wave velocities in the soil, and tactile pressure sensors were utilized to monitor related variations in stresses in the soil surrounding the pile. Measurements obtained from the experiments allow us to explore the behavior of fiction fatigue from a different perspective, especially from the viewpoint of stress changes in the soil surrounding the pile. It was found that for a soil element surrounding the pile in a jacking cycle, the maximum values of the stationary radial and hoop stresses and the ultimate radial and hoop stresses in that soil element are reached when the pile penetrates to nearly the same depth, which is therefore defined as the transition depth. For the soil elements at the same depth, such a transition depth increases with increasing distance from the pile centerline. When the pile base gradually penetrates through the transition depth, these stresses in the soil elements surrounding the pile will exceed the peak value, which in turn leads to a reduction in the ultimate unit shear resistance (τf), giving rise to friction fatigue. Based on these experimental findings, a simple model is also proposed to explain friction fatigue.
Actitudes e ideologías lingüísticas de docentes de español: entre la corrección y el valor de la diversidad
Authors: Rodríguez Ana Constanza
Published: August 2018

Este artículo presenta el análisis de los elementos que conforman las ideologías lingüísticas de docentes de español como lengua materna (ELM) recopiladas en ocho entrevistas a profesores de colegios de Bogotá en el marco de la investigación Actitudes e ideologías lingüísticas en el ejercicio docente.  A partir de los relatos y entrevistas se presentan las tensiones que se generan en el ejercicio docente derivadas del encuentro entre las orientaciones pluralistas del discurso estatal en educación y las valoraciones que hacen los docentes sobre las variedades lingüísticas basadas en la noción de lengua estándar. Finalmente se retoman los postulados y aportes de la sociolingüística para proponer el fortalecimiento de la consciencia sociolingüística como estrategia de formación de estudiantes y formadores en aras de promover el reconocimiento y valoración de la diversidad lingüística en el aula.
Estructura tributaria será más regresiva si se aprueba la reforma
Authors: Red Colombiana por la Justicia Tributaria Red
Published: August 2018

El presente documento realiza un análisis a las principales propuestas realizadas por el Gobierno colombiano en el marco de la propuesta de reforma tributaria, la cual fue presentada al público en el mes de octubre de 2016 y finalmente aprobada en diciembre del mismo año como Ley 1819. Dicho análisis plantea la inconveniencia de las principales líneas de propuesta de la reforma, en un contexto económico particularmente complejo, y donde las nuevas condiciones de impuestos como el Impuesto al Valor Agregado - IVA, reducirá notoriamente la capacidad de consumo de las familias, mientras que en impuestos directos como renta y patrimonio especialmente los pagados por los grandes capitales se obtienen alivios sustanciales.El documento concluye argumentando que la propuesta del Gobierno aumentará la regresividad del sistema tributario colombiano y empeorará las condiciones de vida, especialmente la de los hogares de menores ingresos.
Un Modelo jerárquico Bayesiano espacio-temporal con variable de conteos: aplicación de VIH/SIDA en Costa Rica
Authors: Chou Chen Shu Wei , Alvarado-Barrantes Ricardo
Published: August 2018

Los modelos espaciales que suavizan las tasas de mortalidad estandarizada o los riesgos relativos son utilizados ampliamente en el mapeo de enfermedades, con el objetivo de explorar y describir patrones espaciales de un evento de interés. Generalmente, la estimación de estos riesgos relativos es imprecisa cuando los eventos son raros. Cuando se quiere incluir la tendencia temporal, el problema es aún másgrave pues el conteo de las defunciones en el perı́odo dado se divide en varios años, lo que resulta en que los conteos sean aún más bajos. En este trabajo, se analizan los modelos Bayesianos espacio-temporales que toman en cuenta la información geográfica y temporal, además de algunas covariables como el porcentaje de viviendas urbanas, porcentaje de personas entre 24 y 49 años y la tasa de mortalidadinfantil de cada cantón en el año 2011. Se concluyó que estos modelos producen mejores estimaciones de riesgos relativos por cantón y año, además de que el modelo que asume una interacción espacio-temporal más simple ajusta mejor. Finalmente, se comparan los riesgos relativos estimados con el modelo seleccionado, contra la estimación obtenida vı́a máxima verosimlitud, y resulta que el método propuestoes más eficiente y preciso.
Paquete ZOIP de R para analizar datos proporcionales inflados con ceros y/o unos
Authors: Diaz Zapata Juan Camilo , Hernández Barajas Freddy , Usuga Manco Olga Cecilia
Published: August 2018

Los datos obtenidos a partir de variables medidas bajo porcentajes, tasas y proporciones, son llamados datos proporcionales y estos se encuentran ubicados por lo general en el intervalo (0,1). Diferentes distribuciones se han desarrollado para caracterizar este tipo de variables, sin embargo, existe la posibilidad que este tipo de variables puedan dar resultados de cero o uno. Haciendo que se implementaran dos distribuciones beta inflada con ceros y/o unos, diferenciadas solo por su parametrización. Otros autores han trabajo con otras distribuciones para datos proporcionales inflados, como la distribución simplex, sin embargo, no se ha encontrado una distribución que reúna las principales distribuciones para datos proporcionales inflados con ceros y/o unos, en este trabajo se presenta el paquete ZOIP del sistema de computación R para la implementación de la distribución ZOIP (Zeros Ones Inflated Proportional) que reúne la distribución simplex y beta bajo diferentes parametrizaciones y estima los parámetros de dicha distribución. La estimación de los parámetros de la distribución ZOIP se hace vía máxima verosimilitud. Se realizan estudios de simulación que muestran la convergencia satisfactoria de los parámetros y se presenta el ajuste de una distribución ZOIP a datos reales.
Comparación de intervalos de confianza obtenidos mediante aproximación normal y bootstrap para los parámetros de la Distribución Weibull
Authors: Ojeda Cesar , Pereira Luz Adriana
Published: August 2018

En este trabajo se analiza el desempeño de los métodos aproximación normal y bootstrap paramétrico para la estimación por intervalos de los parámetros de la distribución Weibull en dieciocho escenarios simulados, en los cuales bajo diferentes tamaños de muestra se valora el efecto del parámetro de forma $\beta$, en la estimación por intervalos para el parámetro de escala $\eta$ de la distribución Weibull, de igual manera se varía el parámetro de escala en la estimación por intervalos para el parámetro de forma. Se encuentra en los escenarios simulados que los intervalos de confianza construidos bajo aproximación bootstrap presentaron un mejor comportamiento que los obtenidos por aproximación normal en cuanto a la probabilidad de cobertura y longitud mediana. Los intervalos de confianza al $(1-\alpha)\times 100\%$ por aproximación normal para $\beta$ resultaron asimétricos con respecto al error $\alpha$. En ambos métodos de estimación se evidencia que para $\beta \geq 2$ los intervalos de confianza para el parámetro $\eta$ disminuyen la longitud.
Construcción de un Indice coincidente para la actividad económica Colombiana
Authors: Chudt Nicolás , Nieto Fabio H.
Published: August 2018

Usando factores comunes de un conjunto de variables macroeconómicas y el enfoque de perfil coincidente para seleccionar uno de ellos, como el más cercano al estado de la economía, se propone en este trabajo un índice coincidente para la actividad económica Colombiana.
Adaptación y validación del cuestionario de motivos de participación para deportistas universitarios colombianos
Authors: Bustos Viviescas Brian Johan , Acevedo Mindiola Andrés Alonso , Barrera Pérez Jesús Fabián , Ramírez Pedraza Rubén Darío
Published: August 2018

El objetivo del presente estudio fue adaptar y validar el cuestionario de motivos de participación (CMP) para deportistas universitarios colombianos (DUC). Para ello, se realizó un estudio descriptivo-exploratorio con enfoque mixto y una muestra a conveniencia de dieciséis hombres y trece mujeres con una edad comprendida entre los 17 y los 25 años pertenecientes a los grupos deportivos del Campus Villa del Rosario de la Universidad de Pamplona. Se hizo una adaptación del CMP que constó de 26 ítems. El análisis de la consistencia interna del instrumento y de los ítems (α de Cronbach), así como las medias y desviaciones típicas, se realizó mediante el paquete estadístico IBM SPSS V.22®. Los resultados obtenidos en el α de Cronbach manifestaron una alta fiabilidad (α>0,8), por lo cual no se eliminó ningún ítem del cuestionario adaptado. En conclusión, la adaptación del CMP presentó una alta fiabilidad en DUC.
El parkour como práctica cultural, un análisis desde las relaciones de poder
Authors: Gutiérrez Rodríguez Carlos Arturo
Published: August 2018

Desde hace más de una década, en Colombia ha estado creciendo una comunidadde jóvenes que se dedica a la práctica del parkour, actividad física en la que se utiliza el cuerpo para desplazarse por los espacios urbanos y naturales, desarrollando diferentes tipos de movimientos y acrobacias. El presente artículo se aproxima a este como una nueva práctica cultural, que no ha sido suficientemente explorada por la academia colombiana, sobre la cual se resignifican los espacios y se construyen valores comunes entre los practicantes; quienes rompen con las estructuras de significado hegemónicas que se circunscriben sobre los espacios, para proponer una forma deinteracción diferente entre los sujetos y la ciudad.
Hábitos saludables, motivos y barreras en la realización de actividad física en estudiantes universitarios
Authors: Rodríguez Castellanos Fredy Alexander , Valencia Sandra Carolina , Gaitán Guzmán Erika María , González Rodríguez Sergio Andrés , León Díaz Juan David
Published: August 2018

El principal objetivo de la investigación fue conocer los motivos, barreras y hábitos saludables asociados a la actividad física en estudiantes de Psicología en una universidad de Bogotá. La muestra final fue de 145 estudiantes seleccionados de forma aleatoria, a los cuales se les aplicó una lista de chequeo de hábitos de saludables, la Escala Revisada de Motivos para la Actividad Física y el Cuestionario de Percepción de Barreras para la Práctica de la Actividad Física. Se realizó un análisis descriptivo y posteriormente una regresión logística de la clasificación de activos e insuficientemente activos en relación con los motivos y barreras estudiadas. Los resultados muestran un mayor porcentaje de estudiantes clasificados como activos físicamente frente a otras investigaciones. Se corrobora la falta de motivación intrínseca y de tiempo como barreras más importantes; sin embargo, en cuanto a la predicción de ser clasificado como físicamente activo, el motivo de apariencia física cobra relevancia.
VARIACIÓN ESPACIAL EN COMUNIDADES DE ESPONJAS DE LA COSTA ORIENTAL DE BAHÍA DE COCHINOS, CUBA
Authors: Caballero Hansel , Busutil Linnet , García Yanet , Alcolado Pedro M.
Published: August 2018

En octubre del 2002 se estudiaron las comunidades de esponjas en cuatro localidades del arrecife de la costa este de Bahía de Cochinos, Cuba. En cada localidad se establecieron sitios de muestreo de esponjas en las zonas ecológicas de cabezos coralinos (3 m), terraza somera (6-10 m) y terraza profunda (15 m). Se utilizó el método de transecto lineal de 10 m como unidad de muestreo para medir el cubrimiento del fondo y el marco cuadrado de 1 m para estimar la densidad de la comunidad. Los índices de heterogeneidad y de riqueza de especies mostraron variabilidad entre sitios y cierta tendencia a incrementarse con la profundidad. Se encontraron 30 especies pertenecientes a 19 familias y 21 géneros. Las especies más comunes fueron Mycale laevis, Aplysina cauliformis, Cliona aprica, Aplysina fistularis y Ectyoplasia ferox, las cuales conformaron el 48% del total de individuos identificados. La densidad fue moderada (2-8 ejemplares/m2) y se encontró variación entre sitios. La estación más cercana a mar abierto mostró un valor inferior, posiblemente por ser la más dañada tras el paso del huracán en el 2001. El estado general de la comunidad fue bueno, según los valores de diversidad alcanzados y las especies predominantes, aunque se muestran evidencias de afectaciones recientes producto de un huracán.The sponge communities at four locations on the east coast of Bahía de Cochinos were surveyed in October 2002. At each location, sampling sites were established in the ecological zones of patch reef (3 m), shallow terrace (6-10 m), and deep terrace (15 m). The line-transect method with a 10 m line as sampling unit was used to measure sponge bottom coverage, and a 1 m square grid was used to quantify sponge community density. Species heterogeneity and species richness indices showed variability among sites and tended to increase with depth. Thirty species belonging to 19 families and 21 genera were found. The most common species were Mycale laevis, Aplysina cauliformis, Cliona aprica, Aplysina fistularis, and Ectyoplasia ferox, which comprised 48% of the total individuals identified. Sponge density was moderate (2-8 specimens/m2) and showed variation among sites. The nearest station to open sea showed a lower density value, possibly due to disturbance from the passage of a hurricane in 2001. The general condition of the community was good, based on the diversity values reached and the predominant species, although evidence of impacts from recent hurricane were observed.
ANÁLISIS DE LAS CAPTURAS DE TIBURONES Y RAYAS EN LAS PESQUERÍAS ARTESANALES DE TÁRCOLES, PACÍFICO CENTRAL DE COSTA RICA
Authors: López Garro Andrés , Arauz Vargas Rándall , Zanella Ilena , Le Foulgo Loic
Published: August 2018

Se analizaron las capturas de tiburones y rayas látigo realizadas por pescadores artesanales de Tárcoles  en el Pacífico de Costa Rica, desde febrero del 2006 hasta febrero del 2007. Se observaron 415 faenas de pesca (línea de fondo, trasmallo y línea rayera): 340 correspondieron a observaciones de descarga y 75 (18.1%) a observaciones a bordo. Durante las descargas se analizaron 3299 tiburones y rayas látigo: el tiburón mamón enano (Mustelus henlei) dominó en la captura total (63.7%), seguido por el tiburón mamón común (Mustelus lunulatus) (16.7%), el tiburón picudo común (Rhizoprionodon longurio) 6.9% y el tiburón martillo común (Sphyrna lewini) 6.1%. A su vez, la raya látigo (D. longa) y el tiburón picudo fucsia (Nasolamia velox) representaron un 3.5% y 2.6% de la captura total, respectivamente. En los 75 viajes a bordo se capturó un total de 6.458 peces, de los cuales solo el 4.4% (240 individuos) fueron tiburones y rayas látigo. M. henlei fue nuevamente la especie más abundante (50.4%), le siguieron R. longurio (21.7%), D. longa (13.8), N. velox (5.8%), S. lewini (5.8%), y por último, M. lunulatus (2.5%). Debido a la estacionalidad y abundancia de tiburones mamones en la zona de Herradura, se recomienda un cierre técnico en enero-febrero y setiembre-octubre, meses con las mayores capturas. También se recomienda la protección de la zona del Peñón, ya que es utilizada por la raya látigo y por los juveniles del tiburón martillo.From February 2006 to February 2007, we analyzed shark and rays captures by the artisanal fishermen from Tárcoles, in the Pacific of Costa Rica. We observed 415 fishing operations (bottom line, gillnet and ray line): 340 dock landing observations and 75 (18.1%) on board observations. During the landing observations, we analyzed 3299 sharks and rays: the brown smooth hound (Mustelus henlei) was the most common species (63.7%), followed by the common smooth hound (Mustelus lunulatus) (16.7%), the Pacific sharpnose shark (Rhizoprionodon longurio) (6.9%) and the scalloped hammerhead shark (Sphyrna lewini) (6.1%). The longtail stingray (Dasyatis longa) and the whitenose shark (Nasolamia velox) represented the 3.5% and 2.6% of the total catch, respectively.  During 75 fishing trips, we analyzed 6.458 fish individuals, of them only 4.4% (240 individuals) were sharks and longtail stingrays. Among these, M. henlei was also the most abundant species (50.4%), followed by R. longurio (21.7%), D. longa (13.8%), N. velox (5.8%), S. lewini (5.8%), and M. lunulatus (2.5%). Considering the seasonality and abundance of smooth hound sharks in Herradura, we recommend a technical closure during the higher catch months (January-February and September-October). Also, we recommend protecting the Peñón, which is inhabited by adults of longtail stingray and juvenile scalloped hammerhead sharks.
E-services evaluation criteria: the case of Azerbaijan
Authors: Yusifov Farhad , Gurbanli Aynur
Published: August 2018

[full article in English]

The development of evaluation and effective public administration mechanisms are crucial for providing effective e-government services. The article explores the international expertise in the field of the e-service evaluation process. The organization and provision of e-services in government entities, as well as the evaluation regarding the organization and functioning of information systems, are carried out by the “ASAN service” system in Azerbaijan. The evaluation of the organization and functioning of e-services is conducted by considering three determined criteria: the level of digitalization and relevance, the level of information openness and accessibility, and the level of convenience of use. The evaluation process of e-services allows for improving the level of services and the development of feedback mechanisms; currently, much attention is attributed to the development of citizen-centered services.
(Egalitarinė) socializacija vaikystėje kaip sėkmingos moters karjeros biržinėse bendrovėse prielaida
Authors: Šidlauskienė Virginija , Pocevičienė Rasa
Published: August 2018

[only abstract and keywords in English; full article, abstract and keywords in Lithuanian]

Globally, gender equality in the boards continues on an upward trajectory with slow but positive progress – in 2016, nearly 19% of seats on the boards of the largest companies globally were held by women, up from about 14% in 2012, with 3 percent of this growth coming in just the last two years (Zehnder 2017). A leading country in this matter, Norway, has introduced its quota law in 2007 requiring boards of listed companies to have a gender balance of at least 40/60. The ten years result of this quota happens to be an increase in female board members from 6 percent in 2002 to 42 percent in 2016 (CORE 2017). The EU also tries to push for a quota for women on company boards so as to address the slow progress toward gender equality in the senior ranks of publicly listed businesses. Although 62.7% of new university graduates are women (graduating with Master’s degrees – 66.5%, and 58.9% graduating with doctorates) in 2014, they are outnumbered by men in leadership positions in the corporate sector in the Lithuania. When looking at the top executive positions, there are no women CEOs (Chief Executive Officers) in the listed companies in Lithuania. From December 2013 to September 2014, the share of women on boards (executives) in Lithuania increased by 2.8% (Šidlauskienė, Pocevičienė 2015). Thus, the current moment offers a strategic opportunity to proactively enhance gender equality and prevent any more widening of the gender and skills gaps. This research was aimed to analyze the theoretical aspects of gender balance on the executive boards of the listed companies and to explore childhood socialization predictors that impede (or facilitate) the increase of successful participation of women in decision-making bodies in the listed Lithuanian companies. The successful career women, or the high flyers theory, has been used to argue that childhood socialization, education, personality and motivation indicated personal traits needed for board level roles (White et al. 1992). Second, the individual career capital theory argues that taking up such a role consists of three ways of knowing: knowing-how, knowing-whom and knowing-why. Research results shows that egalitarian childhood socialization influences successful women’s careers in the listed company boards. Certain individual characteristics, such as integrity and honesty, accountability, result-orientation, being a team player, a relationship builder, a good listener and communicator, and genuine commitment and energy, are in demand in such companies as PANDORA A/S, Spencer Stuart, Board Succession etc.
Studentų darbų mokslinio stiliaus trūkumai
Authors: Macienė Jurgita
Published: August 2018

[only abstract and keywords in English; full article, abstract and keywords in Lithuanian]

The academic writing style tends to have quite clearly described requirements. University students use academic writing when doing course papers and theses. The goal of this article is to analyze the drawbacks of the academic style in examples of students’ works, identify the ways in which they are inappropriate and to suggest options for correcting the drawbacks. When reading the course papers and final theses, one can notice that students do not follow the foundational requirements of academic writing – such as clarity, accuracy, conciseness and the logical approach. Instead, they tend to use lexical ambiguity when forming syntax constructions, confuse the coherent reason-consequence relationship, tend to extensively use language that is not very informative or start a sentence focused on one idea and complete it by empasizing a different one. Language mistakes and typographical errors are also noticeable.
Orthogonal Decomposition in Omega-Weighted Classes of Functions Subharmonic in the Half-Plane
Authors: Jerbashian Armen , Vargas Daniel
Published: August 2018

El artículo da un análogo armónico ω-pesado en el semiplano del teorema de proyección de W. Wirtinger's (1 - r)α-pesada establecida por M. Djrbashian Tambié es hallada una descomposición ortogonal para algunas clases de funciones subarmónicas en el semiplano.
Factors Influencing Access to Reproductive Health Information Services among Young Aged 15-24 in Garissa Municipality, Kenya
Authors: Adan Fatuma I. , Githae Dr. M.N.
Published: August 2018

Young people face severe threats to their health and general well being. They are vulnerable to sexual assault and prostitution, too-early pregnancy and childbearing, unsafe abortion, malnutrition, female genital cutting, infertility, anemia, and reproductive tract infections (RTIs) including STIs and HIV/AIDS (NCPD, 2006). Close to a half of women aged 15-19 in Kenya are sexually active and by age 20-24 years, almost all (90%) are sexually exposed, and that 84% of the women aged 15-19 are single girls, then a large proportion of never-married girls are in their sexually active period (KDHS,2003).

This study was designed to look into demographic, economic, cultural, health factors and the knowledge, attitude and practices influencing the access to Sexual Reproductive Health (SRH) information services amongst the youth of Garissa.  The qualitative and quantitative data were collected through structured face to face interviews, focus group discussions and key informant. Data was analyzed using SPSS (version 17). The data from the qualitative methods were analyzed by using the thematic framework analysis. Independent variables influencing the access to SRH information among the youth were determined using multiple logistic regressions.

In conclusion the overall access to SRH information by the youth in Garissa Municipality was low and was mostly influenced by the economic factors, cultural, religious and societal norms that marginalize the youth and the overall lack of access and programs to address youth friendly SRH information. To address the challenges in the access to youth friendly reproductive health information in this setting it is our recommendation that improve the Clinical services to offer the youths with Contraceptive and STI prevention services, antenatal, perinatal, and postnatal care, STI diagnosis and treatment and lastly empower youths with RH and rights and HIV information and life skills education through community outreach programmes.
Design and Fabrication of Fiber Reinforced Boat in Eritrea
Authors: Mohan Thamizhmani , Araya Zereghaber
Published: August 2018

Transportation through water body is the cheapest and the most important way of transportation system in human life. Eritrea has a wide range of coastal area along Red Sea and it is obvious that those people who live in the coastal area were used to fishing. Wood is one of the easiest and ancient materials that have been utilized for the construction of boats and it also remains as a favorite one for many professionals, but the boats which were constructed of woods were much heavier in their light weight, therefore they couldn't carry more loads. Scarcity and high price of the timber along with the high annual repair and maintenance cost will reduce the income of the boatmen and also increased consumption of timber will results in faster deforestation.

In this situation, various alternative materials like ferrocement, aluminium, fibre reinforced glass and fibre reinforced concrete has been used as an alternative material for construction of boats. So, our first work in the fabrication of the boat is to choose the alternative material for fabricating a vessel.

Plywood has lots of advantages like they are stiffer than boards of equal thickness of regular lumber. Due to the stiffness of the plywood panels, weight can be saved by replacing the regular lumbar by plywood, which is an important problem faced in both power and sail boats. Fiber glass along with resins has many advantages like thermal insulation, electrical insulation, reinforcement, heat and corrosion resistant and easily recyclable for future purposes.

This technique of fabrication will give good results by reducing the problems with leakage and bio fouling of hull surface due to marine growth such as barnacles and in turn which increases the life span of the hull surface of the boats. So this work will be useful for those communities who are working with the boats for their transportation and fishing activities and it also improves the standard of the fisherman and their activities. By design and constructing a boat with plywood and FRG, the quality and standard of the boat will be improved along with a certain degree of safety. As a student of marine engineering department, this research work increase the knowledge about design software’s like solid works and delft ship, design parameters of a vessel and all the fabrication procedures of the boat by using fiber reinforced glass in combination with plywood.
First record of the driftwood catfish Spinipterus acsi Akama & Ferraris, 2011 (Siluriformes, Auchenipteridae) for Brazil, Juruá River, Amazon basin
Authors: Calegari Bárbara B. , Akama Alberto , Reis Roberto E.
Published: August 2018

Spinipterus Akama & Ferraris, 2011 is a monotypic genus known only by the holotype of its single species S. acsi, described from a creek tributary to the Nanay River, in the Peruvian portion of the Amazon basin. A second specimen of this genus and species representing the first record of occurrence in Brazil is reported from the Juruá River, upper Amazon basin, Amazonas state.
Perubahan Sosial Budaya Masyarakat Kasepuhan Adat Banten Kidul-Kabupaten Sukabumi
Authors: Azri Jejen Kurnia
Published: August 2018

The Kasepuhan Adat Banten Kidul in Sirnaresmi Village is a traditional society that still holds the legacy of their ancestors. Along with the development of incoming science and technology, gradually this traditional Kasepuhan society experienced a cultural change. Cultural changes that occur as a result of the challenge and response of Kasepuhan adat community to new things so that there has been acculturation of culture.The purpose of this study is to find out how the general description of Desa Sirnaresmi and to know the cultural changes Kasepuhan Adat Banten Kidul people in the Village Sirnaresmi District Cisolok Sukabumi.The method used in this research is historical method. Historical research model is a method that studies events and events in the past based on abandoned sources. This research method is done through four stages, namely heuristic, critic, interpretation, and historiografi.The results of the research in the field can be concluded that there has been a cultural change in Kasepuhan Adat Banten Kidul in Sirnaresmi Village, Cisolok Subdistrict of Sukabumi Regency, this is indicated by changing aspects of language, technology, livelihood, religious system, community system, knowledge and art system. Changes in the culture of Kasepuhan Adat Banten Kidul in Sirnaresmi Village occurred significantly in the early 2000s, when it was repaired by road facilities connecting with the Kecamatan center and after the entry of electricity in the area. The existence of more adequate facilities, making the Kasepuhan Adat Banten Kidul more intensely interacting with the outsiders and the indigenous people of Kasepuhan have been able to follow the development of the outside community. The Kasepuhan Adat Banten Kidul, which is a traditional society that still preserves its ancestral tradition, initially did not respond positively to the new things but gradually they began to follow. This is further supported when the entry of the telecommunications network, so that interaction with the outside community is increasingly massive and make the indigenous people of Kasepuhan has started to leave the tradition of her ancestral heritage because it replaced by incoming outer culture. Acculturation between indigenous cultures and outside cultures that enter, create the birth of a new culture. Subastansial things begin to be abandoned and replaced by a new culture that comes from outside and is considered more modern.
Kritik Terhadap Pemahaman Yang Menyatakan Bahwa Kepemimpinan Islam Harus Berasal Dari Bani Quraisy
Authors: Jaya Canra Krisna
Published: August 2018

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Resolusi Konflik Sosial Keagamaan Di Kota Bandung
Authors: Rahmana Zulfiqri Sonis
Published: August 2018

Religion must be a source of social order and inner peace as something that glamorize and glorify, and make a civilized man. Implementation of religious teachings should be a guideline for human life in order to achieve happiness together. However, in doing social life of human society faced with three problems, namely inability, powerlessness and uncertainty. So today, especially in Bandung, often socio-religious conflict played by the followers of the religion itself. Ironically, the religious teachings of the estuary is often seen as a conflict. This is the dissonance between theory and facts, causing a mismatch. Thus, the researchers want to analyze to these problems, by focusing research on socio-religious conflict resolution in Bandung, whether the function of religion as a cause of conflict or even as conflict resolution.
HETEROGENEOUS ELECTRO FENTON PROCESS FOR TEXTILE WASTEWATER TREATMENT: APPLICATION OF Fe3O4-Mn3O4 AS A CATALYST
Authors: Dat Duc Nguyen Duc
Published: August 2018

To produce quality textile products, many stable synthetic dyes are invented. However, textile wastewater discharged into the environment contains a large amount of dyes which are bio-recalcitrants and stable to heat and solar radiation. These toxic contaminants impact negatively the environment for a long time and poison plants, animals, and human. In this study, Heterogeneous Electro Fenton  process with Fe3O4-Mn3O4 as a catalyst was used for textile wastewater treatment. Graphite electrodes were chosen for their stability and good conductivity. Three operating factors greatly affected the removal efficiency are current density, pH and catalyst dosage. Response surface methodology was applied to find empirical mathematical models for these factors, then find an accordant operating condition for treatment which provides high removal efficiency and low operating cost. Investigated ranges scaled in previous studies were: current density (10 – 20 mA/cm2), pH (3 – 5), and catalyst dosage (0.5 – 1.5 g/l). At current density of 17.03 mA/cm2, pH of 3.77, catalyst dosage of 1.17 g/l, the treatment reached its optimum condition, COD and Color removal efficiencies were 93.3 % and 99.2 %, respectively, where COD and Color values in the effluent are 56 mg/l and 16 Pt-Co.
THE STUDY ON OPTIMIZATION OF COPPER LEACHING FROM WASTE PCBs BY USING RESPONSE SURFACE METHODOLOGY
Authors: Ngoc Mai Tran Thi
Published: August 2018

Recycling printed circuit boards (PCBs) is an important solution not only to treat hazardous waste but also to recover valuable materials. This research focus on optimizing the leaching copper process from waste PCBs to recycle. This process was performed in Fe2(SO4)3 solution at room temperature and using H2O2 as an oxidant. For optimization, response surface methodology was used to investigate the different parameters, including Fe2(SO4)3 concentration, volume of H2O2 addition and leaching time. Design Expert 10.0 software was applied to design the experiments and calculate the regression equation of the response function. As a result, a model was established which is compatible with the experimental data at the correlation coefficient (R2) of 0.99. The optimal conditions were identified as Fe2(SO4)3 concentration of 0.35 M, volume of H2O2 addition at 10 mL and leaching time of 10 h. Under this condition, leaching efficiency of 90.5 percent was achieved. After leaching, copper was recovered from extract solution by electrochemical technology with the efficiency of 85 percent. The results from this study hence proposed a very promising method for recycling copper in PCBs.
COMMUNITY PERSPECTIVE OF SUSTAINABLE URBAN DRAINAGE SYSTEM TECHNIQUES: A CASE STUDY OF NHIEU LOC – THI NGHE SUB-BASIN IN HO CHI MINH CITY, VIET NAM
Authors: My Lan Nguyen Hoang
Published: August 2018

With the philosophy of stimulating ways that nature behaves under extreme weather conditions, Sustainable Urban Drainage System (SUDS) has been internationally recognized as one of the most sustainable approaches to minimizing the impacts of flooding on urban development coupled with the achievement of multiple benefits on environmental and social aspects. In this paper, the social aspect of SUDS is examined through the community’s acceptance of a wide range of SUDS techniques, including Green Roof (GR), Rainwater Harvesting (RWH), Pervious Pavement (PP), Green Open Space (GOP), and Pervious Parking Lot (PPL). Data were collected through a social survey of community responses to above SUDS applications in Nhieu Loc – Thi Nghe sub-basin from November 2016 to March 2017, then SPSS software was used to analyze data and test statistical hypothesis. The results show that the most preferred SUDS technique is PP, followed by PPL, GOP, RWH and GR respectively. Through statistical hypothesis test, the relationship exists between (1) the community’s acceptability to proposed SUDS techniques and district as well as gender; (2) the community’s acceptance for and their knowledge of SUDS applications; and (3) the priority of SUDS’s benefits between the districts and acceptability as well as understanding of SUDS applications.
MODIFICATION OF OXIDIZED ACTIVATED CARBON SURFACE BY Fe AND Mn FOR ARSENIC REMOVAL FROM AQUEROUS SOLUTION
Authors: Hai Thinh Pham Thi
Published: August 2018

Carboxylate groups on oxidized activated carbon surface were transformed to the forms of Mn2+ and Fe3+ (signed as OAC-Mn and OAC-Fe respectively) through multi-step procedure. This modified activated carbon then was used as an adsorption material for arsenic removing from aqueous solution. Synthetic water containing As(III) and As(V) was used for study of arsenic adsorption capacities of OAC-Fe and OAC-Mn. The similar study had also been done with original granular activated carbon for comparison. The effects of modified metals onto oxidized activated carbon, metals doses and initial arsenic concentration on the removal of As(III), As(V) have been surveyed and discussed. Batch adsorption experiments were carried out with arsenic concentration in the range of 1 – 50 mg/l. Langmuir models were used for the adsorption isotherm screening. The results showed that both of OAC-Fe and OAC-Mn have good adsorption capacities for As(III) but OAC-Fe has a greater removal capacity for As(V) than OAC-Mn. OAC-Mn was identified as a good material for the of As(III) removal, because of its oxidation efficiency of As(III) to As(V) during adsorption process.
CO-DEGESTION OF FOOD WASTE AND DOMESTIC WASTEWATER BY USING UPFLOW ANAEROBIC SLUDGE BLANKET (UASB) COUPED WITH A MICROFILTRATION MEMBRANE (MF)
Authors: Ha Bui Hong
Published: August 2018

This study investigated anaerobic co-digestion of food waste (FW) and domestic wastewater (DWW) by upflow anaerobic sludge blanket (UASB) combined with an external microfiltration membrane (MF) - AnMBR. The model was conducted with varying of hydraulic resident time of 72 h, 48 h, 36 h and 24 h in corresponding with varying of flux, respectively, were 47, 70, 94 and 141 L/m2.h. Removal efficiencies of TSS, tCOD, nitrogen and phosphorus were evaluated. The potential of biogas production also was determined. The results showed that removal efficiency of TSS and tCOD at above mentioned fluxes, respectively, reached 96.81 %, 97.04 %, 97.29 % and 98.08 % for TSS and 91.47 %, 89.31 %, 88.70 % and 87.0 % for COD. Also, the yield of biogas production was 0.083 L/gCODremoved, 0.085 L/gCODremoved, 0.105 L/gCODremoved and 0.103 L/gCODremoved, respectively, in corresponding with above mentioned fluxes. This study indicated that application of the lab-scale model of anaerobic membrane bioreactor for co-digestion the mixture of WF and DWW utilized the concentrated stream of membrane module to increase the biogas yield and to reduce amount of waste solid in landfill.
PRELIMINARY STUDY ON SEPARATION OF RARE EARTH METALS FROM LEACH SOLUTION OF DISCARDED FLUORESCENT POWDER BY SOLVENT EXTRACTION
Authors: Quang Nguyen Duc
Published: August 2018

Discarded fluorescent lamps were considered as hazardous waste in Vietnam (code is 160106). However, its composition contained valuable rare earth metals, which can be recycled and recovered by leaching and solvent extraction processes. The present study sought to define the conditions of separation for rare earth elementals (REEs) from acid leach solution by solvent extraction using PC88A. The acid leach solution was obtained from leaching of fluorescent powder. Efficiencies on REEs extractions as functions of pH levels, extractant concentration, O/A ratio, metal concentration were investigated. For pH values greater than 0.0 and less than 1.0, the orders of the yields extraction were determined: yttrium > terbium > europium > aluminum and calcium. The best separation circuit included four-stage counter current extraction for yttrium separation with 20 %v/v PC88A in kerosene (O/A = 1/1, room temperature, 20 min of contact, pH of 0.38) and stripping step with 3 M HCl acid (O/A = 1/1, room temperature, 30 min of contact). After yttrium separation, the leach solution was extracted at pH of 0.98 in the same other conditions with two-stage counter current extraction to recover terbium and europium group. The final recovery from leach liquor was higher than 98 % and the grade of the final product was 94.2 % (for yttrium) and 93.8 % (for terbium and europium group).
LEVELS OF SELECTED INDOOR AIR POLLUTANTS IN THREE HA NOI OFFICES
Authors: Thuy Ly Bich
Published: August 2018

A study on the levels of indoor air pollutants in Ha Noi was conducted. Three offices in Ha Noi were selected for this purpose. Selected indoor air pollutants including SO2, NO2 and respirable particulate matter (PM10) were monitored in the wet and dry seasons of 2015. Air conditioners were turned on for the whole time, while air purifiers were turned on for haft of the time in each sampling site. An hourly measurement of outdoor levels was also conducted before indoor measurement. Levels of outdoor PM10 varied in the range of 13.4-106.0 µg/m3. The level of indoor PM10 varied in the range of 3.5-25.1 µg/m3. The average levels of indoor PM10 were lower than that of outdoor one in all cases. High time resolution data showed that indoor PM10 levels temporarily increased sharply by activities (walking and room sweeping) and high frequency of opening the doors. Concentrations of outdoor/indoor SO2 varied in the range of             < 0.4-34.5 /< 0.4-47.1 ppb. Concentrations of outdoor/indoor NO2 varied in the range of              4.3-33.4/3.3-27.8 ppb.
BIOMETHANE POTENTIAL (BMP) OF ARROWROOT POWDER PROCESSING WASTE AND EFFECT OF ALKALINE PRE-TREATMENT
Authors: Hong Lien Nguyen Pham
Published: August 2018

Arrowroot waste has been being discharged without treatment in powder/starch processing villages in Viet Nam causing serious environmental problem. This waste is degradable and might have good Biomethane Potential (BMP) which leads to a possibility to treat them by anaerobic digestion. Therefore, the study aimed to find out the BMP of the waste and to find out if alkaline pre-treatment would improve it. Solid waste from arrowroot powder processing was collected in Duong Lieu village, Ha Noi, and different samples were going through BMP test: the untreated sample and NaOH pre-treated samples at different NaOH dose from 3 to 9 wt. % (dry weight based). BMP was determined in 590 mL bottles at 37 oC for 50 days. As the results, BMP of the original arrowroot waste sample was 253 NmLCH4/gVS and alkaline pretreatment increased BMP of the waste 21.9 % at 7 % NaOH. The reduction of lignin content and hemicellulose content at this pretreatment were 7.2 % and 9.4 %, respectively. The results show that the waste has potential for methane recovery and alkaline pre-treatment by NaOH would slightly improve its biodegradability.
SEASONAL DYNAMICS OF NITROGEN IN CULTIVATED SOIL AT GIAO THUY DISTRICT, NAM DINH PROVINCE
Authors: Thu Ha Ly Thi
Published: August 2018

This paper focuses on evaluating the nitrogen mineralization and NH4+ and NO3- leaching from the root zone in cultivated soils of Giao Thuy district, Nam Dinh province using Synthetic accumulation (SIA) method. Main findings reveal that total N content in vegetable fields and rice-vegetable-rotational fields ranges from 17.68 – 113.68 kgN ha-1, and from 14.64 – 132.59 kgN ha-1, respectively. Total N is also significantly different between saline paddy-fields and fresh-water fields, varies between 16.33 – 82.12 kgN ha-1 and from 23.89 – 74.04 kgN ha-1, respectively. NO3- accounts for a larger proportion in vegetable fields and accumulated higher during the dry season; NH4+ predominates in paddy fields and accumulated mainly in rainy season. The N leaching losses decreased in the following order: vegetable, rice-vegetable rotation, non-saline and saline soil.
Stratigraphical and Sedimentological Review of the Merawu Formation, Serayu Basin, Central Jawa, Indonesia
Authors: Martosuwito Surono , Bachri Syaiful , Kamal Zakiyah Ainul
Published: August 2018

DOI: 10.17014/ijog.5.2.117-128Merawu Formation is widely distributed in the Serayu Basin, Central Jawa, Indonesia. The formation is dominated by fine-grained clastic sediments comprising interbedded mudstone, siltstone, and sandstone. In the field, these outcrops are well exposed and well bedded. Stratigraphically, the Merawu Formation is underlain by the Paleocene Worawari Formation and overlain by the Late Miocene Penyatan Formation. Contacts between the Merawu Formation and the Worawari Formation are always found as fault types. Twelve sections have been done during the field work. Two members were identified within the Merawu Formation (Sandstone and Mudstone Members) in the field, where they interfinger each other. Previously, researchers interpreted the Merawu Formation as a turbidite sequence of deep marine deposits and depicted Early - Middle Miocene in age. However, the interpretation from the present research shows that the Merawu Formation was deposited on a tidal flat environment and has Early Miocene - Pliocene age, based on foraminifers found in some sections.
Scale Prevention Technique to Minimized Scaling on Re-Injection Pipes in Dieng Geothermal Field, Central Java Province, Indonesia
Authors: Agustinus Eko Tri Sumarnadi , Syafri Ildrem , Rosana Mega Fatimah , Zulkarnain Iskandar
Published: August 2018

DOI: 10.17014/ijog.5.2.129-136Dieng geothermal field including its volcanic geothermal system is dominated by hot water. Brine water is characterized by high salinity, content of chloride (Cl-), amorphous silica (SiO2), Na+, and K+. The condition of brine water has potential for the formation of amorphous silica scale in the re-injection pipeline which is one of the obstacle in the electrical energy production. The scale prevention on re-injection pipes was performed with non-acid re-injection system. Nevertheless, the scale formed in the re-injection pipe is still relatively thick due to the non-optimal sludge. This research is focused in optimizing the deposition of sludge. The research aim is to apply scale prevention technique on re-injection pipeline by involving engineering technology. The study was conducted through laboratory experiments with factorial design method 23 (two levels of three factors). Those three factors are pH, concentrations of coagulants and flocculants concentrations which act as the independent variables. The indicator is the volume of sludge deposition and turbidity of brine water which act as the dependent variables. The result showed that the most significant factor is pH, whereas the concentrations of coagulant and flocculant are preserved to accelerate and stabilize the sludge deposition. The optimal condition is achieved at the level of pH 8, the concentration of 10 ppm coagulant (PAC), and 1 ppm flocculants (Polyamide). These parameters are then used for the preparation of scaling process technology on the prevention of re-injection pipeline by adding some equipments on settling ponds. Therefore, in addition to reduce environmental degradation, it also produces sludge that has potential to be used as raw materials for other industries.