bluuebunny/crossref_metadata_2025 huggingface dataset:
PRODUCTION AND PHYSICOCHEMICAL PROPERTIES OF THERMOSTABLE, CRUDE CELLULASE FROM ENTEROBACTER CLOACAE IP8 ISOLATED FROM PLANT LEAF LITTERS OF LAGERSTROEMIA INDICA Linn.
Authors: I. Akintola Abayomi , Oyedeji Olaoluwa , O. Adewale Isaac , K. Bakare Mufutau
Published: February 2019

Cellulases have wide applications and biotechnological potentials for various industries. A bacterium producing an extracellular, thermostable cellulase was isolated from plant leaf litters of Lagerstroemia indica Linn, inside a botanical garden. According to morphological, biochemical and physiological characterization, it was tentatively identified as Enterobacter sp. Molecular characterization, using the 16S rRNA gene sequencing was used to confirm the identity of the bacterium as Enterobacter cloacae IP8. Effects of some cultural factors such as carbon and nitrogen sources, pH and temperature, on cellulase production from the bacterium, were investigated. Some physicochemical properties of the crude cellulase from E. cloacae IP8 were determined to evaluate its potentials for industrial applications. The maximum yield of cellulase (10.78 U/mL) was at 28 h of incubation using carboxymethyl cellulose (CMC) (1.5%, w/v), peptone (2.0%, w/v), inoculum size (1.0%, v/v), pH and temperature of 7.0 and 45 oC, respectively, and agitation speed 150 rpm. The crude cellulase exhibited optimum activity at 60 oC, retaining 75.0% of its maximal activity at 70 oC. It had optimum pH of 7.0, retaining 58.0% of its original activity at acidic pH 5.0. Metal ions Na+, Ca2+ and Mg2+ remarkably enhanced activity of the cellulase while K+ and EDTA inhibited activity of the cellulase from E. cloacae IP8. The characteristics of the cellulase from E. cloacae IP8 revealed the enzyme as being thermostable and an acidic to neutral metalloenzyme. Therefore, the enzyme from this strain could be applied in industrial applications such as lignocellulosic biomass conversion into fuel and other value added products.
Vomiting and Dehydration in a 2-Year-Old
Authors: Edmunds Katherine , Gurria Juan , Koberlein George , Zamor Ronine , Breech Lesley , Shah Kara , Hariharan Selena
Published: February 2019

A 2-year-old girl with a past medical history of cutaneous mastocytosis and eczema presented with 1 day of yellow-green, nonbloody vomiting, bradycardia, and listlessness. She was evaluated by her pediatrician and sent to the emergency department because of concern for dehydration. In the emergency department, she improved with fluid rehydration but still had decreased energy and bradycardia. Her electrocardiogram revealed sinus bradycardia, and laboratory results did not reveal any electrolyte abnormalities. Glucose levels were normal. An abdominal radiograph revealed a moderate-to-large stool burden, and the results of a computed tomography scan of the head were normal. An abdominal ultrasound was obtained to evaluate for intussusception. The ultrasound revealed a blind-ending tubular structure in the right-lower quadrant with adjacent free fluid, which was concerning for appendicitis. The patient was admitted to the surgical service for further management and was taken to the operating room, where a definitive diagnosis was made.
Análisis jurídico de la participación en plusvalía en la ciudad de Bogotá D. C.: 2004-2016
Authors: Vargas Apráez Eduardo Andrés
Published: February 2019

La participación en plusvalía es un gravamen que se genera por la expedición de normas urbanísticas que modifican la utilización del suelo, bien sea cambiando su uso u otorgando un mayor aprovechamiento en edificabilidad. A partir del año 2004, la ciudad de Bogotá inició la reglamentación para implementar el tributo. El objetivo de esta investigación es analizar las etapas del procedimiento para el cobro de la participación en plusvalía adelantadas por la administración, a través de los pronunciamientos judiciales ejecutoriados, no susceptibles de recursos, dentro del periodo comprendido entre 2004 a 2016, en los cuales actuó como parte demandada. La metodología empleada fue el análisis de normatividad y doctrina para efectos de comprender la operatividad del procedimiento. Posteriormente se seleccionaron expedientes en el sistema de información web de la rama judicial y la consulta y revisión de sentencias se realizó directamente en los despachos judiciales. El análisis jurisprudencial permite observar que la Ley 388 de 1997 se presta para diversas interpretaciones. En cuanto a los hechos generadores, la ley no aclara si el predio debe acceder al beneficio contemplado en la acción urbanística, generando actuaciones que provocaron la vulneración al principio de irretroactividad tributaria. En la etapa de exigibilidad, la administración expidió liquidaciones de aforo, procedimiento no contemplado en el artículo 81 de la Ley 388 de 1997. Adicionalmente, se utilizó el método inadecuado para calcular el efecto plusvalía y se negaron devoluciones sin fundamento. Lo anterior provocó vulneraciones al ordenamiento legal que generaron sentencias condenatorias.
Identificación y cuantificación de los procesos de cambio de las coberturas sobre el territorio de la cuenca alta del río Bogotá, entre 1977 y 2015
Authors: Cortés Sánchez Sandra Pilar
Published: February 2019

La cuenca alta del río Bogotá es considerada un área estratégica del país por la vocación agrícola de sus suelos, al igual que por su alta calidad paisajística y red hidrográfica que se sustenta en ecosistemas naturales particulares, entre ellos los páramos, bosques andinos y humedales. Sin embargo, últimamente la calidad del paisaje se ha visto afectada y las coberturas, tradicionalmente agrícolas y de vegetación natural, han sido sustituidas por otras de tipo industrial, comercial y habitacional, lo cual amerita ser cuantificado en un periodo de tiempo específico, en contexto con la normatividad actual. El presente estudio realizó la identificación y cuantificación de cambios en las coberturas sobre dicho territorio, entre 1977 y 2015, igualmente se calcularon tasas de cambio, deforestación y pérdida de coberturas vegetales naturales. Los resultados evidencian que en este periodo el 70,54 % del territorio se ha trasformado, el 1,93 % fue alterado, el 0,53 % está en degradación y el 26,72 % presenta aún conservación de áreas naturales. Por otra parte, las coberturas de bosques naturales disminuyeron cerca de 38.681,39 ha. La deforestación total anual promedio en un periodo de 38 años fue de 1.017,93 ha/año para el bosque nativo. La tasa de deforestación de bosque nativo es de -1,54 %. La tasa de pérdida de páramo es de -0,16 %, la de los matorrales es de - 3,03 % y la de la vegetación subxerófita es de -1,56 %.
Customer perceived value in high growth firms
Authors: Mawson Suzanne
Published: February 2019

Scholars have asserted that a key factor that differentiates high growth firms (HGFs) from other firms is their ability to create value for their customers. This paper contributes to the literature by empirically exploring this relationship. Drawing on comparative cohorts of eleven HGFs and ten non-HGFs in Scotland, this paper finds that the HGFs were much more likely than their non-HGF counterparts to be positively influencing customer perceived value, which is considered as an important enabler of firm performance and growth. In addition to its empirical contribution to the high growth entrepreneurship literature, this paper raises issues for future research.
Do profitable start-up firms grow faster? Evidence from Colombia
Authors: Honjo Yuji
Published: February 2019

This study explores the impact of profitability on the growth of start-up firms. Using data on start-up firms in Colombia, we examine the relationship between firm growth and profitability. We provide evidence that start-up firms with higher profitability increase their total assets. However, we find little evidence that profitability positively affects sales growth for start-up firms. In contrast, the results provide support for the notion that profitability is derived from sales growth. Furthermore, we find that firm growth depends heavily on firm age during the start-up stage.
High-Growth firms in Peru
Authors: Coad Alex , Scott Gregory
Published: February 2019

This exploratory research note investigates the frequency and activity of HighGrowth Firms (HGFs) in Peru using panel data on Peru's largest firms for the years 2001-2016. Firms in our dataset enjoyed strong growth in revenues during the period. Compared to other countries, HGFs are relatively common in Peru although the share they represent of all firms in the database decreased over the time span of our analysis. We confirm several previous findings, such as the heavy-tailed growth rates distribution, and the superior growth performance of small and young firms.
Determination of the sodium retardation factor using different methods: Analysis of their characteristics and impact on the solute movement prediction in a structured Brazilian soil
Authors: Godoy Vanessa , Napa-García Gian Franco , Zuquette Lázaro
Published: February 2019

The retardation factor (Rd) is one of the main important solute transport parameters. Its value can vary significantly depending on the method used for its determination. In this paper, the sodium Rd is experimentally determined using undisturbed sandy columns to compare four methods of Rd determination and assess the impact of the chosen method in the prediction of sodium movement. Column experiments in undisturbed soil columns and analytical analysis were performed. The results showed that the soil has dual-porosity and preferential pathways. The breakthrough curves were in accordance with the soil’s physical characteristics. The Rd values ranged from 1.7 to 7.77 depending on the initial concentration and on the method used. These differences arise from the conceptual model of each Rd determination method. The experimental and analytical analysis indicated that the higher the Rd, the slower the movement. The methods that best reproduced the laboratory sodium movement were Ogata and Banks’ (1961), and Langmuir and Freundlich’s isotherms. The prediction models presented smaller errors with the increase of the initial concentration. In these cases, the predicted concentrations can be overestimated up to 22.5 % when using a not suitable method. Hence these results suggest that the Rd determination method can strongly affect the prediction of the sodium movement. Because of that, it is of vital importance to evaluate each method and how they can be adequate to the soil under investigation when determining Rd.
On the influence of the spatial distribution of fine content in the hydraulic conductivity of sand-clay mixtures
Authors: Fuentes William Mario , Hurtado Carolina , Lascarro Carlos
Published: February 2019

Sand-clay mixtures are one of the most usual types of soils in geotechnical engineering. These soils present a hydraulic conductivity which highly depends on the fine content. In this work, it will be shown, that not only the mean fine content of a soil sample affects its hydraulic conductivity, but also its spatial distribution within the sample. For this purpose, a set of hydraulic conductivity tests with sand-clay mixtures have been conducted to propose an empirical relation of the hydraulic conductivity depending on the fine content. Then, a numerical model of a large scaled hydraulic conductivity test is constructed. In this model, the heterogeneity of the fine content is simulated following a Gaussian distribution. The equivalent hydraulic conductivity resulting of the whole model is then computed and the influence of the spatial distribution of the fine content is evaluated. The results indicate that the hydraulic conductivity is not only related to the mean fine content, but also on its heterogeneity.
A new large Pliosaurid from the Barremian (Lower Cretaceous) of Sáchica, Boyacá, Colombia
Authors: Páramo-Fonseca María Eurídice , Benavides-Cabra Cristian David , Gutiérrez Ingry Esmirna
Published: February 2019

A new fossil MP111209-1 found in the Barremian beds of Sáchica, a town near Villa de Leiva representing the more complete skeleton found in the region is described here. After a detailed study of its morphological characteristics, it is evident that the new specimen represents a new genus and species of brachauchenine pliosaurid from Central Colombia that we named Sachicasaurus vitae gen. et sp. nov. Sachicasaurus is a large brachauchenine (almost 10 m in length) characterized by the following combination of characters: skull exceeding two meters in length,  transverse constriction in the rostrum, caniniform teeth present, pineal foramen in a very advanced position, palatines separated in the midline by the pterygoids, very short mandibular symphysis (bearing four teeth positions), reduced number of mandibular teeth (less than 20), slender hyoid bones, 12 cervical vertebrae, cervical centra showing ventral foramina, single rib facet in all cervical centra, at least 40 pre-caudal vertebrae, and ilium with a long posterior projection. Although it is difficult to clearly establish the phylogenetic position of Sachicasaurus viate within Brachaucheninae due to its combination of primitive and derived features, the morphological comparisons and the cladistic analysis show an evident phylogenetic proximity of Sachicasaurus to the Aptian-Albian genus Kronosaurus.
Brazilian version of the Fresno test of competence in Evidence-Based Medicine: a validation study
Authors: Salerno Margareth Rodrigues , Herrmann Fábio , Debon Leticia Manoel , Soldatelli Matheus Dorigatti , Forte Gabriele Carra , Bastos Marília Dornelles , Sarria Edgar Enrique , Antonello Ivan Carlos Ferreira , Mattiello Rita
Published: February 2019

AIMS: To validate the Brazilian version of the Fresno test of competence in Evidence-Based Medicine.METHODS: This is a cross-sectional, validation study. Phase 1: translation of the Fresno instrument. Phase 2: validation of the translated version, which was tested in 70 undergraduate medical students. The psychometric properties evaluated were validity, internal consistency, and sensitivity to change.RESULTS: Overall, validity was adequate; most items showed a moderate to strong and significant correlation with the total score; there was an important and significant difference between both groups, with and without previous contact with Evidence-Based Medicine (median, 55 [IQ25-75, 45.2-61.7] vs. median, 18.5 [IQ25-75, 6.0-29.7]) (p <0.001). Internal consistency was also adequate (α-C 0.718), and sensitivity to change showed a considerable and significant difference between pre and post-test (median, 18.5 [IQ25-75, 6.0-29.7] vs. median, 44 [IQ25-75, 34.0-60.0]) (p <0.001).CONCLUSIONS: The Brazilian version of the Fresno test showed satisfactory psychometric properties, and it can now be used as a tool to assess the knowledge and skills of Evidence-Based Medicine in Brazilian medical students.
Desenvolvimento juvenil positivo e projetos de vida: uma revisão sistemática da literatura internacional
Authors: Winters Christian , Leite Juliano Porto de Cerqueira , Pereira Bruna Caroline , Vieira Gabriela Pagano , Dellazzana-Zanon Letícia Lovato
Published: February 2019

O desenvolvimento juvenil positivo se refere a ser o melhor que cada um pode ser e a otimizar desenvolvimento durante a adolescência e o início da vida adulta. Muitos adolescentes desenvolvem suas potencialidades em conjunto com o desenvolvimento de um projeto de vida positivo. Este estudo objetivou realizar uma revisão de literatura internacional dos artigos sobre desenvolvimento juvenil positivo e projetos de vida. Buscou-se identificar como os autores internacionais definem projetos de vida e desenvolvimento juvenil positivo e quais as principais temáticas desses artigos. A busca foi realizada no Portal de Periódicos da CAPES, sendo os descritores utilizados life purpose e positive youth development. Identificaram-se 86 artigos, dos quais se eliminaram 49 por não serem revisados por pares e três por não terem sido publicados durante os anos de 2007 a 2017. Foram lidos os resumos de 34 artigos, dos quais 22 foram descartados por não se adequarem à temática do estudo. Analisaram-se 12 artigos. Os resultados indicaram que há uma definição predominante de projetos de vida na literatura internacional. Quanto às principais temáticas dos artigos, observou-se uma predominância de estudos sobre: propriedades psicométricas de escalas, adolescentes em situação de vulnerabilidade, religiosidade adolescente e relações entre projetos de vida e forças de caráter.
Medicalização na educação: refletindo sobre seus desdobramentos na saúde pública e direitos humanos
Authors: Cardoso Daniela De Figueiredo Moitinho , Hashizume Cristina Miyuki
Published: February 2019

A presente pesquisa aborda as consequências da medicalização na educação a partir de uma reflexão sobre o uso de psicofármacos no controle de comportamentos considerados inadequados para o aprendizado escolar. A partir dessas consequências, refletiremos acerca dos desdobramentos na saúde pública e no debate sobre direitos humanos. Em estudo realizado a respeito dessa temática (CARDOSO, LIMA, HASHIZUME, 2018) discutimos os desafios da formação docente para modificar o uso excessivo de psicofármacos em diagnósticos errôneos que tratam comportamentos inadequados como transtornos. O objetivo deste artigo é discutir o papel do professor na garantia de práticas escolares diferenciadas que estejam em acordo com a valorização e respeito aos direitos humanos dos alunos. A partir das leituras realizadas; acreditamos que o professor tem papel decisivo na resolução de problemas de aprendizagem utilizando procedimentos pedagógicos, e não medicamentos. O método utilizado no presente artigo foi bibliográfico por meio de análise de documentos e estado da arte sobre o tema. Utilizamos  metodologia qualitativa a partir de análises referentes à legislação existente acerca do assunto, além de publicações realizadas por pesquisadores engajados no movimento do Fórum de Medicalização da Vida e da Sociedade. A análise bibliográfica se fundamentou em trabalhos como teses, e artigos dos seguintes autores: Collares e Moysés (2013); Hashizume e Dietrich (2017); Viègas (2014). A pesquisa possibilitou adentrarmos em uma temática promissora e de suma importância para a atualidade, tendo em vista sua parca discussão na educação. Entendemos que o educador pode auxiliar nessa nova realidade, sendo protagonista e mediador na construção de uma cultura da paz.
As vias do ultraconservadorismo entre 1935 e 1945: o jornal A Ordem - RN
Authors: Furlin Marcelo , Colavite de Aguiar Rafael Henrique
Published: February 2019

Este artigo tematizou a pesquisa documental realizada a partir do periódico potiguar denominado A Ordem, entre os anos de 1935 a 1945. O estudo investigou e compreendeu de que forma o jornal da então Diocese de Natal pôde tecer uma base de estudos sobre os eventos regionais, nacionais e internacionais do período, por meio de sua linguagem clara e de aspecto quase narrativo, típico de jornais locais. Para análise do conteúdo do jornal recorreu-se a autores que versam sobre laicidade, educação, ensino religioso, totalitarismo e aparelhos ideológicos, além de pesquisas e artigos anteriores sobre o mesmo documento. O jornal apresentou dentre seus diversos focos a aproximação ideológica entre católicos e integralistas, o teor anticomunista de seu discurso e a defesa do ensino religioso como ferramenta de proselitismo e combate ao comunismo. Os resultados foram as constatações de que a educação é utilizada para fins ideológicos pelas políticas públicas; dado o atraso regional e apesar da incongruência das doutrinas, católicos e integralistas encontraram um caminho paralelo para se fortalecerem politicamente na região Nordeste, em especial no estado do Rio Grande do Norte.
Quels médias pour se ré-approprier une voix? L’investissement d’internet par le mouvement dalit.
Authors: Zaslavsky Floriane
Published: February 2019

This presentation is aiming at exposing the media strategy of the dalit movement, an Indian social movement lead by activists, who belong to the so-called « untouchable » populations. This study is especially centered on the way they build media spaces that are seen as both free and safe, allowing them to produce discourses within their community through the mobilisation of the socio-technical tools of the internet. We will expose to begin with the relationship of this movement with the Indian media, marked by a strong rejection fed by a feeling of exclusion. Then, we shall discuss their occupation and mobilisation strategies on the online space, perceived as a place of memory, a safe bubble, as well as an ideological battlefield.
Between opportunities and threats – an analysis of Brazilian Landless Workers’ movement experiences with new media technologies
Authors: Sartoretto Paola Madrid
Published: February 2019

Recent discussions and research about the uses of digital social media platforms by social movements and protest organizations have raised questions about threats and challenges represented by these technologies. There is also a debate on whether digital social media platforms can contribute to establish and strengthen long-standing oppositional groups and structural change. In this context, this article analyses how the Brazilian Landless Workers Movement (MST) experiences and views the use of digital social media platforms in its communicative processes. Based on interviews and observations, the article shows how MST militants present ambivalent views towards platforms such as Facebook and Twitter and towards the dynamics of digital communication. Conclusions point that the main concern is threat to the organic collective character of the movement posed by individualistic digital social media platforms. Different from contemporary protest organisations, MST sees a clear separation between the movement and its media. The goal is to appropriate of and control media technologies, which brings many difficulties when dealing with digital social media platforms.
Television sex education panics? An analysis of three public debates in The Netherlands
Authors: Mols Anouk
Published: February 2019

In 2013, television sex education show Dokter Corrie instigated a heated public debate in the Netherlands. This study places the Dokter Corrie uproar in a broader perspective and identifies the moral dimensions in the reactions to three Dutch television sex education shows: Open en Bloot (1974), Spuiten en Slikken (2005) and Dokter Corrie (2013). A contemporary notion of moral panics and media panics provides a suitable theoretical basis for understanding the multiplicity of voices, the reflexive relationships between interest groups and the deliberate use of media tools in the debates about Dutch television sex education. The qualitative frame analysis and quantitative content analysis led to a detailed account of the three public debates and showed that moral attitudes concerning the problematic conditions of television sex education recurred over time. The resulting four frames each revolve around the claim that sex education needs to be handled carefully. The Indispensable education frame and the Inadequate attempt frame regard television as the right channel for this goal. In contrast, voices within the Degenerating media frame and the Religious anxiety frame claim that television sex education threatens the social sexualisation of children.
Estudio empírico-conceptual de la crisis económica y cultural en la prensa española
Authors: Castillo Sebastián Sánchez
Published: February 2019

Esta investigación muestra el tratamiento que la prensa otorga a las noticias relativas sobre la crisis cultural en términos económicos, conceptos tan polisémicos como influyentes en los imaginarios sociales. Cómo se sustancia la cultura en la trastienda de la crisis y en la política, produce un marco periodístico afín a una ideología y a un relato político concreto. La presencia de estas informaciones en la prensa, sin duda condicionan los modos de acción y de organización de las empresas culturales, y además anuncian el epicentro de una lucha política. Se propone abordar esta cuestión desde un análisis de contenido complejo y el descubrimiento de los encuadres noticiosos mediante el paradigma framing con el que extraer la perspectiva de la información, la elección y el énfasis, reconstruir la estructura latente y las dimensiones subyacentes del tratamiento informativo respecto de estas informaciones. Mediante un proceso de covariación y prueba t de Student, quedarán expuestos los encuadres noticiosos de las tres primeras cabeceras españolas; El País, El Mundo y el Abc, sobre esta realidad social y cultural durante doce meses (enero 2014 a febrero 2015).
Os jovens e o acompanhamento da informação sobre a atualidade: análise de estudos e o impacto de novas práticas mediáticas
Authors: Melro Ana Isabel , Pereira Sara
Published: February 2019

Baseado em dados de relatórios estatísticos, procurou-se refletir sobre as tendências de acompanhamento da informação da atualidade no quotidiano dos jovens, nos últimos anos, e como tais tendências podem contribuir para uma maior participação cívica. Nos três estudos analisados, dois internacionais e um nacional (Pew Research Center (2012), Reuters Institute for the Study of Journalism (2013) e Marktest (2012), respetivamente), observou-se, de modo geral, um aumento pela preferência de conteúdos mediáticos situados entre a esfera da informação e do entretenimento, entre os jovens, em detrimento de assuntos políticos. Paralelamente, na literatura existente algumas correntes argumentam que o acompanhamento de soft news pode comprometer o futuro dos media e da democracia, enquanto outras defendem que aquelas poderão ter um impacto positivo na formação dos jovens cidadãos, encorajando-os a pensar criticamente acerca da atualidade. Apesar do debate controverso, argumenta-se que o caminho para a cidadania reside sobretudo no desenvolvimento de competências críticas sobre a informação e na capacidade dos jovens cidadãos exprimirem interesses e ideologias, fazendo uso das potencialidades das novas ferramentas. Este artigo insere-se na Bolsa de Doutoramento “O (des)interesse dos jovens pela atualidade: estudo sobre o papel dos media na informação sobre o mundo” (SFRH/BD/94791/2013) financiada pela FCT, QREN e POPH.
MODELO CIRCULAR DA INTERAÇÃO: DESIGN DA INTERAÇÃO NA ESFERA DO CIBERJORNALISMO
Authors: Amaral Inês
Published: February 2019

Este artigo visou o desenvolvimento de um modelo conceptual e transdisciplinar para o design da interação na esfera do ciberjornalismo, concretizado numa matriz de análise com base em critérios definidos com o propósito de ser passível de se aplicarem casos concretos. O modelo partiu da premissa de que o Design da Interatividade é o conceito central dos processos de comunicação e interação de produtos informativos online. O modelo que traçamos processa-se ao nível da orientação à tarefa e, consequentemente, à informação. A passagem da audiência (noção tradicional) para o conceito de utilizador assume-se como o pressuposto chave do modelo delineado.
Uma proposta de um modelo taxonómico para a classificação de fontes de informação
Authors: Lopes Felisbela
Published: February 2019

As fontes de informação jornalística são um vetor central para avaliar a qualidade do jornalismo e a vitalidade do espaço público que vamos construindo através dos media. Constituindo-se como centro do campo disciplinar na Sociologia das Fontes Jornalísticas, as fontes permitem um estudo dos conteúdos jornalísticos a montante, durante e a jusante de todo o processo de construção noticioso. Em qualquer um dos pontos que assente a investigação, exige-se uma compreensão clara e profunda daqueles/daquilo que é citado nos textos noticiosos. Para isso, são necessários instrumentos analíticos completos e de simples aplicação àquilo que se pretende estudar. Ainda que a literatura das ciências da comunicação nos devolva algumas tipificações que agrupam variáveis de análise, não há um modelo taxonómico que permita uma classificação algo exaustiva das fontes citadas nos textos jornalísticos. É uma proposta para esse modelo que aqui apresentamos.
Atisbos a la memoria histórica de la Universidad Central “Marta Abreu” de Las Villas desde el documental televisivo
Authors: Morrell Consuegra Arley Enrique , Sarduy Melendres Yankiel
Published: February 2019

El artículo valora el estudio: La memoria histórica de la Universidad Central “Marta Abreu” de Las Villas desde el documental televisivo de divulgación histórica, realizado entre 2012 y junio de 2013 como tesis de dos estudiantes de periodismo de esa institución cubana. La investigación sistematizó la historia de la universidad al caracterizar tres etapas de desarrollo coincidentes con cambios radicales en el país y su sistema educativo (Gobiernos Auténticos y Dictadura de Fulgencio Batista, 1940-1959; Triunfo de la Revolución, 1959; e inicio de la crisis en 1991). Tales etapas se expusieron en una trilogía de documentales de producción independiente. Esa memoria audiovisual construida en el contexto conmemorativo del aniversario 60 de la universidad, catalizó el ejercicio de memoria y su institucionalización como historia oficial del centro. No obstante, el abordaje confrontó limitaciones de formato y estética inherentes a una realización televisiva, al menos ajena a políticas editoriales; que sin embargo constriñó posibilidades interpretativas en la construcción del relato histórico, mas magnificó la carga significativa del sentido histórico en el diálogo entre verdad histórica e identidad, cognición y emoción, situando una dimensión social (educación) donde actores (educandos-educadores) se autentifican rememorando una experiencia de formación compartida (estudiar en la universidad).
El smartphone como metamedio
Authors: Márquez Israel
Published: February 2019

Este artículo parte de la teoría del ordenador como metamedio desarrollada inicialmente por Kay y Goldberg (1977) y retomada años después por Manovich (2013) para trasladarla al ámbito del teléfono móvil en su versión smartphone. Tal propuesta se encuadra dentro de la denominada era post-PC y de computación ubicua, dominada por el uso creciente del smartphone como principal tecnología de comunicación, información y convergencia. Si el ordenador puede considerarse como el paradigma de metamedio del siglo XX, el smartphone o “teléfono inteligente” se está convirtiendo cada vez más en el verdadero metamedio del siglo XXI.
Estereotipos de género y socialización del menor: La publicidad de juguetes a través de Facebook en España
Authors: Díaz-Campo Jesús , Fernández-Gómez Erika
Published: February 2019

Los mensajes publicitarios son persuasivos. La presencia de estereotipos de género en los que se dirigen a los menores puede influir decisivamente en su proceso de socialización. Por ello, este trabajo se centra en la estrategia seguida en Facebook por los principales anunciantes del sector de juguetes en España durante la campaña de Navidad 2014-2015. Se analiza el objetivo del mensaje, el género de los menores, la presencia de adultos, la voz en off y el tipo de acción. Los datos obtenidos se comparan con los estudios precedentes, que se han limitado a analizar los mensajes en televisión y otros medios offline. Los resultados muestran una menor presencia de estereotipos y que las marcas han cambiado su estrategia, para adaptarla a la naturaleza de las redes sociales.
El rigor científico en el vídeo online. La percepción de los expertos sobre los vídeos de contaminación del aire en Youtube
Authors: Bortoliero Simone Terezinha , León Bienvenido
Published: February 2019

Este artículo tiene por objetivo evaluar el rigor científico de los vídeos online sobre contaminación del aire, difundidos en la plataforma Youtube y publicadas en portugués y español en 2014. Se trata de una investigación realizada en colaboración con 17 científicos de Brasil y España, que evaluaron el rigor científico de una muestra de 100 videos, 50 en español y 50 en portugués. Los resultados indican que, según los científicos, los vídeos sobre contaminación del aire publicados en Youtube, tanto en español como en portugués, tienen un bajo nivel de rigor científico.
Simulacro, ficción y manipulación de la realidad en la era digital: photoshop y el retoque fotográfico
Authors: Ramos Lahiguera Carlos Manuel , Téllez Infantes Anastasia , Martínez Guirao Javier Eloy
Published: February 2019

El objetivo de este artículo es analizar la relación entre fotografía y verdad y evaluar de qué modo el mensaje icónico se modifica con la llegada de la era digital, la capacidad plástica de las imágenes de mapa de bits y la proliferación de fotografías en Internet y las redes sociales. En este artículo se recogen algunos resultados de una investigación con un enfoque diacrónico y antropológico, basada en el trabajo con documentación bibliográfica y en el análisis de imágenes difundidas desde diversos medios. Como valor añadido, se aporta la observación y experiencia activa como usuarios y profesionales del diseño gráfico y el uso de programas de retoque fotográfico como Adobe® Photoshop®. Se plantean preguntas para evidenciar cuestiones sobre el uso que viene haciendo la sociedad del retoque fotográfico y cuáles podrían ser los factores que crean interpretaciones sobre trabajos de retoque de imágenes considerados como necesidades de la edición técnica a diferencia de otros que sean entendidos como manipulación malintencionada. La imagen fotográfica funciona como elemento de la comunicación con diversos significados dependiendo del mensaje al que pertenece y los valores a los que sirve.
The Challenge of User-And QoE-Centric Research and Product Development in Today's ICT-Environment
Authors: De Marez Lieven , De Moor Katrien
Published: February 2019

Within today’s ICT environment, trends like a growing convergence and increasing competition, have led to a fast-changing market with an increasing speed of innovation development and shortening product life cycles. Because of the skipping of research stadia, the lack of insight in the end-user expectations, needs, experiences, and of suitable methodologies … the number of failing innovations has increased remarkably. On the other hand, the boom on the supply-side led to an enormeous empowerment of the consumer. Influenced by these trends, a clear evolution towards a more user-centric, ‘pull’-driven mentality started to manifest itself from the early nineties on. In this respect, the concept of ‘Quality of Experience’(QoE) started to acquire a central place in today’s innovation and technology development literature, as the success of innovations has become highly dependent on the experience of the user. This paper focuses on two major challenges 1) ‘What is QoE?’: to date, there still exists a lot of inconsistency and confusion about the interpretation and definition of QoE. In order to tackle this challenge a conceptual model of QoE is presented. The second challenge is related to the question 2) ‘How should QoE be measured?’ In this respect, an overview of the most important problems is given and a new approach for more user-centric QoE-measurement is proposed.
Video-On-Demand: Towards New Viewing Practices?
Authors: Van den Broeck Wendy , Pierson Jo , Lievens Bram
Published: February 2019

In this paper, we focus on the user aspects of a specific television service, video-on-demand (VOD), offered on two platforms: TV and computer. The concept of video-on-demand has already for a long time been the subject of new media research, first in its analogue version and more recently as a digital service. The main asset of this functionality, embedded in different devices, is that it offers the ability of video content being watched at any time and thereby enables extensive ways of time shifting. Furthermore, there is a possible expansion in available content, made by professionals as well as amateurs. Therefore VOD has the technical capability to fundamentally change our viewing patterns and practices. The question is however: How does the audience domesticate this new kind of audiovisual content and (how) does it fit in with their everyday viewing practices? Based on an environmental scan consisting of an extensive literature review, this paper synthesises knowledge on existing viewing practices as well as the video on demand’s new affordances. Possible shifts and interactions are investigated and new research questions are being identified.
Inside The Circle: Using Broadcast SMS In A Sports Club
Authors: Byrne Pat
Published: February 2019

With over 100% penetration, the mobile phone has become a normalised part of everyday communications in Ireland. This paper examines the use of the mobile phone within two Irish sporting clubs and finds that in both the regular practice of communication has been transformed by the use of broadcast SMS text messages sent using the ‘distribution list’ facility on handsets or through the web. The SMS are sent by club administrators for information distribution and as reminders for gatherings, causing an increased cohesiveness within the group. For the administrators, broadcast SMS offers a convenience in what is a voluntary job, communicating information on fixtures, matches and training, essential for the smooth running of the club. For the club members who receive the SMS, the distribution of such information through their mobile phone has saved time and minimised travel, while strengthening their ties to the club. Both groups are enthusiastic and quote instances of how it provides new opportunities to them and how they can plan their lives around this new way of working.
Users In The 'Golden' Age Of The Information Society
Authors: Slot Mijke , Frissen Valerie
Published: February 2019

In the Web 2.0 era it no longer holds to think of users as ‘end-users’, as they have moved to the heart of the value chain. They have become important actors in virtually all elements of online services. In this paper we shall explore these innovative roles of users and reflect on the future impacts of this shift. To support our claims about the innovative roles of users, we have analyzed 150 Web 2.0 services into more detail. In this paper we shall argue that Web

2.0 may be understood as a first sign of what Perez has labelled ‘societal re-engineering’ and ‘creative destruction’. However, as we are still at the beginning of what Perez describes as a potential golden age of the information society, there are also still major uncertainties about the future of the web and the potential impacts this may have. At this point in time it is far from sure whether we are indeed approaching a ‘golden age’ of technological development. To explore the future roles of users, in the final part of the paper we shall therefore also highlight some future aspects from the perspective of changing user-producer relations.
Can Peripherally Inserted Central Catheters Be Safely Placed in Patients with Cancer Receiving Chemotherapy? A Retrospective Study of Almost 400,000 Catheter-Days
Authors: Campagna Sara , Gonella Silvia , Berchialla Paola , Morano Giacomo , Rigo Carla , Zerla Pietro Antonio , Fuzzi Raffaella , Corona Gianvito , Storto Silvana , Dimonte Valerio , Mussa Baudolino
Published: February 2019

Background

Peripherally inserted central catheters (PICCs) are central venous catheters (CVCs) that are commonly used in onco-hematologic settings for chemotherapy administration. As there is insufficient evidence to recommend a specific CVC for chemotherapy administration, we aimed to ascertain PICC-related adverse events (AEs) and identify independent predictors of PICC removal in patients with cancer receiving chemotherapy.

Materials and Methods

Information on adult patients with cancer with a PICC inserted for chemotherapy administration between September 2007 and December 2014 was extracted from six hospital databases. The primary outcome was PICC removal due to PICC-related AEs (occlusion, infection, or symptomatic thrombosis). Independent predictors of PICC removal were identified using a multivariate Cox regression model.

Results

Among the 2,477 included patients, 419 PICC-related AEs (16.9%; 1.09 AEs per 1,000 PICC-days) were reported. AEs increased when PICC was inserted at the brachial site (hazard ratio [HR], 1.37; 95% confidence interval [CI], 1.02–1.84) and with open systems (HR, 1.89; 95% CI, 1.24–2.88) and decreased in older men (HR, 0.63; 95% CI, 0.49–0.81).

Conclusion

Use of PICC for chemotherapy administration was associated with a low all-AEs rate. The basilic vein was the safer site, and valved systems had fewer AEs than open systems. More research is needed to explore the interaction between AEs, sex, and age.

Implications for Practice

These findings provide clinicians with evidence that peripherally inserted central catheters (PICCs) are safe for chemotherapy administration. They also suggest that clinicians should limit the use of open systems when long chemotherapy regimens are scheduled. Moreover, alternatives to PICCs should be considered when administering chemotherapy to young men.
A Case of Donor-Transmitted Non-Small Cell Lung Cancer After Liver Transplantation: An Unwelcome Guest
Authors: Sonbol Mohamad B. , Halling Kevin C. , Douglas David D. , Ross Helen J.
Published: February 2019

Cancer transmission with organ donation has been previously reported with a variety of malignancies and organ transplants. The risk of transmission through organ transplantation from donors with a history of previously treated malignancies has been addressed by guidelines from transplant societies. Herein, we report a case of a patient who developed lung cancer confined to the liver after liver transplantation with no known history of malignancy in the donor. The suspicion of donor origin arose after positron emission tomography-computerized tomography scan showed metastatic lung cancer only involving the transplanted liver without a primary focus. Genetic analysis of the malignant cells confirmed donor origin of the cancer.
Modifications of a simple clogging and back-washing efficiency model for arsenic filters
Authors: Imteaz Monzur Alam , Khan Shahnoor Alam , Ahsan Amimul
Published: February 2019

After continuous use of any filtration device, clogging of the filter media becomes apparent, which eventually causes poor performance of the filtration process. Back-washing is a common technique that is used for the recovery of the filtration capacity of clogged filter media. This paper presents the development of a simple clogging and back-washing efficiency model for a special filter medium. The ‘third-generation IHE family filter’ was developed by the Unesco-IHE Institute for Water Education and is widely used for treating arsenic-contaminated water in many countries, including Bangladesh. Several field tests were conducted at three different sites in Bangladesh having different qualities of influent water. The model coefficients developed were derived using the collected data on flow measurements through the device during successive clogging and back-washing periods of up to 4 months. The developed model with the selected model coefficients can simulate field measurements on flow retardation and recovery with good accuracy. Eventually, selected model coefficients (clogging factors) for the three sites were correlated with the respective ammonium and iron contents in the influent water. It was found that the clogging factor linearly varies with the ammonium and iron contents of the inflow water.
Entre Pais e Filhos: Encontros com a Cultura dos Videogames
Authors: Kroeff Renata Fischer da Silveira , Gavillon Póti Quartiero , Carangache Kijner Lígia , Maraschin Cleci
Published: February 2019

Os videogames têm se constituído como um objeto de estudo para diversas áreas de conhecimento, criando um campo de pesquisa heterogêneo e com controvérsias relacionadas a aspectos positivos e negativos sobre as experiências de jogo. Com sua popularização no Brasil a partir da década de 1970, atualmente existe uma geração de adultos que cresceu jogando jogos digitais. O presente estudo visa  abordar o que acontece quanto essa geração de jogadores constitui família e segue jogando videogames, agora com seus filhos. A estratégia metodológica escolhida consistiu na realização de entrevistas com pais e mães que jogam videogame com seus filhos. A pesquisa teve a participação de oito pais e duas mães. A estratégia metodológica escolhida, assim como a análise dos registros das entrevistas seguiu a abordagem sistêmica dos estudos da família e dos estudos da cognição enativa. Tal aporte teórico embasa nossa compreensão dos resultados da pesquisa. Em relação a decisões quanto ao acesso dos filhos aos jogos, o conhecimento empírico sobre a experiência de jogar videogame pareceu ser mais considerado do que o conhecimento conceitual-declarativo ao qual os participantes têm acesso na cultura. Observou-se que práticas envolvendo os videogames podem envolver formas interessantes de socialização em família e em outros contextos sociais.
As metáforas em Verdade e Coração: estudo contrastivo do léxico fraseológico a partir de um corpus paralelo
Authors: Donizete Delgado Ribeiro Caldas Ariane , Orenha-Ottaiano Adriane , Amadeu Sabino Marilei
Published: February 2019

O presente trabalho tem por objetivo analisar o léxico fraseológico formado pelas lexias verdade e coração em um corpus paralelo composto pelas legendas em inglês e português de cinco temporadas do seriado norte-americano Gossip Girl, a fim de evidenciar as metáforas conceptuais subjacentes a estas combinatórias e de contrastar as manifestações linguísticas metafóricas oriundas destas duas lexias em ambos os idiomas em tela. Para a análise, contamos com o suporte metodológico do programa Word Smith Tools, versão 6.0 (SCOTT, 2012), o qual nos possibilitou a identificação e extração do léxico fraseológico composto por metáforas conceptuais presentes no referido seriado. Dessa forma, foi possível identificarmos um total de doze metáforas conceptuais diferentes nas unidades fraseológicas constituídas pelas lexias verdade e coração e truth e heart. Espera-se, assim, ter sido possível evidenciar a presença das metáforas conceptuais em unidades fraseológicas, ressaltando a importância das metáforas para a Fraseologia.
Metáforas situadas em charges sobre economia: multimodalidade e argumentação
Authors: Medeiros Ilana Souto
Published: February 2019

Este artigo tem como principal objetivo evidenciar que as metáforas, enquanto mecanismos cognitivos, estão presentes nos mais diversos modos de comunicação, o que lhes confere um caráter multimodal e, muitas vezes, argumentativo. Para isso, propomos um breve panorama teórico acerca da metáfora, apresentando, de modo breve, a Teoria da Metáfora Conceptual (LAKOFF; JOHNSON, 1980 [2002]); damos ênfase, principalmente, à noção de metáfora situada (VEREZA, 2013, 2016), que, em linhas gerais, são licenciadas pelas metáforas conceptuais; e analisamos três charges sobre a economia, que foram extraídas com o auxílio da ferramenta de busca Google. Nossa análise mostrou que as metáforas situadas construídas a partir das charges possuem uma natureza argumentativa, o que permite delimitar visões de mundo bastante específicas.