bluuebunny/crossref_metadata_2025 huggingface dataset:
Serological and Molecular Biological Studies of Parvovirus B19, Coxsackie B Viruses, and Adenoviruses as Potential Cardiotropic Viruses in Bulgaria
Authors: Ivanova Stefka Kr. , Angelova Svetla G. , Stoyanova Asya P. , Georgieva Irina L. , Nikolaeva-Glomb Lubomira K. , Mihneva Zafira G. , Korsun Neli St.
Published: January 2017

Background:Inflammatory diseases of the heart (myocarditis, pericarditis) are commonly caused by viruses. Among the human cardiotropic viruses, parvovirus B19, Coxsackie B viruses, and adenoviruses play a leading role.

Aim:The aim of the present study was to determine the presumptive causative role of parvovirus B19, Coxsackie B viruses, and adenoviruses in the development of myocarditis, pericarditis and dilated cardiomyopathy by demonstrating the presence of specific antiviral antibodies or viral DNA in patients’ serum samples.

Materials and methods:We tested serum samples collected between 2010 and 2014 from 235 patients with myocarditis (n=108), pericarditis (n=79), myopericarditis (n=19), dilated cardiomyopathy (n=7), and fever of unknown origin accompanied by cardiac complaints (n=22). The mean age of patients with the standard deviation was 33 ± 18 years. Serological and molecular methods (ELISA for specific IgM/IgG antibodies to parvovirus B19 and IgM antibodies to Coxsackie B viruses and adenoviruses, and PCR for detection of parvovirus B19 in serum samples, respectively) were used in the study.

Results:Of all tested 235 serum samples, in 60 (25.5%) positive results for at least one of the three tested viruses were detected. Forty out of these 235 serum samples (17%) were Coxsackie B virus IgM positive. They were found in 17% (18/108) of the patients with myocarditis, in 15% (12/79) of those with pericarditis, in 16% (3/19) of those with myopericarditis and in 32% (7/22) in those with fever of unknown origin. The 63 Coxsackie B virus IgM negative patient’s serum samples were tested by ELISA for presence of adenovirus IgM antibodies. Such were found in 4 patients with pericarditis and in 2 patients with fever of unknown origin. Every IgM negative sample (n=189) for Coxsackie B and adenovirus was further tested by ELISA for parvovirus B19 IgM/IgG antibodies. B19-IgM antibodies were detected in 14 patients (7.4%). The percentages for B19-IgM antibodies was 8% (7/90), 5% (3/63) and 31% (4/13) in the patients affected with myocarditis, pericarditis, and fever of unknown origin, respectively. Protective B19-IgG antibodies were found in 108 (57%) of the samples. A B19-PCR signal was detected in all the patients who were B19-IgM positive, and in only 1 patient with positive B19-IgG result, the latter presenting with dilated cardiomyopathy.

Conclusion:The present study shows the involvement of Coxsackie B, parvovirus B19 and adenoviruses in the development of inflammatory diseases of the heart (myocarditis and pericarditis). It is the first ever study in the country that simultaneously analyzes the prevalence of the three major human cardiotropic viruses.
Finite Population Mean Estimation through a Two-Parameter Ratio Estimator Using Auxiliary Information in Presence of Non-Response
Authors: Pal S. K. , Singh H. P.
Published: January 2017

In surveys covering human populations it is observed that information in most cases are not obtained at the first attempt even after some callbacks. Such problems come under the category of non-response. Surveys suffer with non-response in various ways. It depends on the nature of required information, either surveys is concerned with general or sensitive issues of a society. Hansen and Hurwitz (1946) have considered the problem of non-response while estimating the population mean by taking a subsample from the non-respondent group with the help of extra efforts and an estimator was suggested by combining the information available from the response and nonresponse groups. We also mention that in survey sampling auxiliary information is commonly used to improve the performance of an estimator of a quantity of interest. For estimating the population mean using auxiliary information in presence of non-response has been discussed by various authors. In this paper, we have developed estimators for estimating the population mean of the variable under interest when there is non-response error in the study as well as in the auxiliary variable. We have studied properties of the suggested estimators under large sample approximation. Comparison of the suggested estimators with usual unbiased estimator reported by Hansen and Hurwitz (1946) and the ratio estimator due to Rao (1986) have been made. The results obtained are illustrated with aid of an empirical study.
Changes in water quality of a small urban river triggered by deep drainage of a construction site
Authors: Bartnik Adam , Moniewski Piotr
Published: January 2017

The paper presents the results of the monitoring of the selected physicochemical properties of the Jasień River waters (in Łódź, the third biggest city of Poland) and their changes under the influence of drainage of a railway station Łódź Fabryczna construction site. Even 25 years ago the Jasień River was a receiver for the sewage from the Łódź textile factories. The drainage of the excavations and disposal of the water into the Jasień River was started on January 2014 and changed stable hydrological, physical and chemical regime of the river once again. In a consequence, average monthly flows exceeded the Jasień River flow in its upper section by six times, and at the beginning by even ten times. Chloride concentration was systematically growing over the study period. This growth and higher water pH were probably associated with increasing level of contaminants in the discharged water and its gradually decreasing uptake. Average annual water temperature increased and a decrease in its amplitude was observed. The annual conductivity and pH patterns became more uniform and the changes in pH followed a clear trend of monthly changes. Water turbidity increased by two times and during summer floods this parameter was often even a few times higher than before the drainage commenced. Chlorides improved water conductance and sodium and potassium increased basicity.
Features of application of the Penman–Monteith method for conditions of a drip irrigation of the steppe of Ukraine (on example of grain corn)
Authors: Romashchenko Myhailo , Shatkowski Andrzej , Zhuravlev Olexandr
Published: January 2017

In the article presented the features of application and adaptation of the calculation method for determination of evapotranspiration Penman–Monteith. With the purpose of effective use of this method in the practice of a drip irrigation in the steppe zone of Ukraine, on the base of the field’s experiments results were conducted correlation ofKcwith a taking into account deviations from standard conditions (on the example of grain corn).
Dynamics of the daily course of water temperature in Polish lakes
Authors: Skowron Rajmund , Piasecki Adam
Published: January 2017

The study focuses on short-term changes in surface water temperature in Polish lakes, and is based upon the experimental measurements of water temperature conducted every 60 minutes during the years 1971–2015. 19 lakes were selected on the grounds of their morphometric properties. The examinations were carried out in the system of expeditionary measurements (up to 8 days) and stationary measurements (over 2 months), and included temperature of surface water and its vertical distribution. The analysis of the results showed that temperature differences of water (daily amplitudes) were observed in both time and spatial distribution. The biggest differences in water temperature occurred during spring warming, and often reached 4–5°C, while rarely exceed 2°C in the remaining periods of the yearly cycle. The mean day value occurs twice; in the morning between 8:00 (7:00 GMT) and 11:00 (10:00 GMT), and in the evening at 20:00 (19:00 GMT) and 22:00 (21:00 GMT). Daily changes in the vertical distribution of water temperature are clearly visible down to the depth of 2.5–3.5 m, whereas are just perceptible to the depth of 5.5–7.0 m.
Breaks and Ruptures: Cripping the Reading of Resistance
Authors: Karmiris Maria
Published: January 2017

With the support of the work of scholars in critical disability studies, crip theory, and poststructuralism, my intention in this paper is to explore some narrative fragments of my experiences teaching ‘Leonard’ and the ways we both accepted and resisted each other. Judith Butler’s question: “What does it mean to require what breaks you?”, will be central to investigating our mutual dependency on each other in ways that emphasize the tensions between my ‘authority’ as a teacher and his ‘resistance’ as a student. The first part of this paper will apply the work of critical disability studies scholars such as Erevelles (2011, 2013), Titchkosky (2008) and Gabel et al (2013), as a way to contextualize and orient my relation to Leonard within an educational landscape that reads Leonard as a problem that needed fixing (presumably by me as the teacher). The second part of this paper will seek to ‘crip’ the image of the teacher ‘fixing’ the ‘problem’ child and demonstrate the ways this story is perpetually, always and already disrupted and failing. In applying the work of McRuer (2006) among others, the intent in this section is to explore how resistance in both its passive and active forms is necessary in both the (re)forming and breaking of the distinct yet linked subject positions that Leonard and I inhabit. The final section of this paper will turn to the work of Mitchell et al (2014) and their conceptualization of cripistemologies as desiring failure as resistance to success, alongside a retelling of my persistence in the face of Leonard’s resistance. Ultimately the intention of this paper is to make a contribution to critical disability studies and crip theory by exploring both the limits and potential of the intertwining ‘matrix of relations’ Butler (2015) offers as hopeful possibility.
¿Qué creencias sostienen estudiantes de pedagogía, profesorado en servicio y personal académico formador de docentes, en Chile, sobre la pobreza?
Authors: Gomez-Nocetti Viviana De Lourdes
Published: January 2017

The systematic failure of low socioeconomic levelchildren at school is a shared concern. What is the role of teachers and other involved individuals’ beliefs in maintaining this failure? This research answers the question: Are there differences in the beliefs between student teachers, in-service teachers, and Chilean teacher educators about the teaching and learning of literacy, and early math in the context of poverty? A questionnaire with two open questions and two Likert scales were applied to 265 student teachers, 66 in-service teachers and 25 teacher educators. With qualitative data, some descriptions were organized as “visions”; and with quantitative data, conglomerates and ANOVA were analyzed, based on Z scores. The results show: 1) negative view on school, children, and vulnerable families, 2) good teacher vision centered in affective-motivational features, 3) negative view on the family context shared to the whole sample, 4) over 70% had an intermediate vision on literacy beliefs and 50% on initial mathematics beliefs, 6) complex vision was the less present, 7) in-service teachers had the most stereotypical views regarding vulnerable schools, 8) only between 10% and 30% of teacher educators had complex beliefs. These results inform teacher education institutions about the beliefs and actors to whom their strategies for change should target.
Necesidades de formación profesional en el ámbito de la primera infancia: Percepción y aportes del estudiantado
Authors: Castillo-Cedeño Rocío , Ramírez-Abrahams Patricia , Ruíz-Guevara Lilian Susana
Published: January 2017

The analysis and information presented in this article are part of an experience developed in the research project Primera infancia: hacia una propuesta de formación contextualizada y pertinente [Early Childhood: Toward a Proposal of a Professional, Contextualized, and Pertinent Formation] of the Basic Education Division at the National University of Costa Rica. The information was collected with the purpose of identifying the needs for professional formation on the field of early childhood, through the perception and contributions of students in levels V and VII of their undergraduate degree in the Pedagogy career with a concentration in preschool education. This is an exploratory-type investigation aiming to know the opinions and perceptions of the students in relation with the process they go through at the university. For it, we used a questionnaire of seven open questions related to the needs of formation and concrete experiences lived during this process. As a result from this study, the analysis had a descriptive conclusion when exploring the main needs of the students. The information collected was complemented with the theory of investigation known, the contributions for the review of the whole preschool study plan, and all the knowledge built during the research project aforementioned. One of the main findings is that most of the students expressed that their formation lacks of the professional instrumentation to work with children aged zero to four years. They also said that it is very important to start working in a similar process on the earlier stages Pedagogy covers like maternal cycle and early stimulation. This systematization and analysis of the students’ perception is an effort to support the review of the study plan for the Pedagogy career with concentration in preschool education. The help of the students’ perceptions and experiences is a fundamental contribution in order to build a contextualized and relevant proposal; this is the main part of the research project aforementioned.
Modelling and testing of a historic steel suspension footbridge in Ireland
Authors: O'Donnell Deirdre , Wright Robert , O'Byrne Michael , Sadhu Ayan , Edwards Murphy Fiona , Cahill Paul , Kelliher Denis , Ghosh Bidisha , Schoefs Franck , Mathewson Alan , Popovici Emanuel , Pakrashi Vikram
Published: January 2017

Daly's Bridge is a historic steel suspension footbridge in Ireland, known locally as the ‘Shaky Bridge’ for its noticeable movement under pedestrian loading. Although there is concern regarding the performance of the structure, testing or modelling has not been carried out to date and inadequate information exists in relation to carrying out such analyses. In this paper, Daly's Bridge is instrumented and tested for the first time and a model of the bridge is established and improved in the process. Apart from ambient vibration, excitation from traversing pedestrians and cyclists is considered. Video analysis of dynamic deflection, a wavelet-packet-based technique using acceleration responses and dynamic measurements from a cheap smartphone accelerometer application are used to identify and compare the natural frequency of the bridge. The work contributes to the evidence base of full-scale measurements from instrumenting and analysing responses of aging pedestrian bridges, highlighting the complexity, challenges, opportunities and limitations related to the varied levels of information available from disparate sources. The study also highlights the need to investigate to what extent cheap sensors can be successfully used as compared to their more expensive and sophisticated counterparts.
Conto e histórias de vida das Ciências Sociais
Authors: Leite Carolina
Published: January 2017

A utilização das histórias de vida e das narrativas de ficção nas Ciências Sociais tem suscitado, desde sempre, um certo númeero de obstáculos, face à regulação epistemológica que tem dominado a produção do conhecimento no domínio das Ciências Humanas. No entanto, o interesse crescente por este tipo de material levou-nos a fazer uma breve reflexão sobre a sua importância na compreensão das trajectórias individuais bem como dos processos sociais que as condiciona
A investigação em Ciências da Comunicação - o seu actual momento em Portugal
Authors: Fidalgo António
Published: January 2017

É minha opinião que algum do mal-estar que se gerou em Portugal entre as classes profissionais ligadas à comunicação, nomeadamente jornalistas e publicitários, e os cursos superiores de comunicação se deveu ao tipo de investigação que esses cursos privilegiaram...
Catástrofes fiduciárias: o valor ondulatório do dinheiro
Authors: Mourão José Augusto , Casquilho José
Published: January 2017

Analisa-se aqui o texto inserto no capítulo «O preço» (pág: 104,105) do livro "O dinheiro - donde veio, para onde foi" de J.K. Galbraith, segundo o método morfo-semiótico. Analisam-se as figuras da correcção técnica, recessão, depressão, crise e pânico segundo as variações notadas ao longo da sua discursificação. Estas variações permitem concluir da correspondência morfodinâmica entre figurações dos objectos-valor em circulação e os contratos fiduciários que lhes subjazem. A figura da «crise» é sujeita aqui a uma retórica da atenuação que a converte sucessivamente em figuras mais «ténues» de modo a desactivar o efeito de retroacção produzido sobre a expectativa do corpo social...
Jornalismo e pesquisa - A trajectória intelectual de Carlos Eduardo Lins da Silva
Authors: Rebouças Edgard , Macedo Mônica
Published: January 2017

Este texto faz parte de um conjunto de trabalhos, cujo objetivo e sistematizar as ideias do grope de pesquisadores da Escola Latino-americana de Comunicação, no conceito de Marques de Melo (1998). Analisa-se aqui a trajetória intelectual de Carlos Eduardo Lins da Silva, um jornalista e pesquisador brasileiro, pertencente a geração doscchamados «renovadores» da pesquisa em comunicação no Brasil. Conhecido pela atuação na grande imprensa, Lins da Silva foi também professor universitano, tendo o título de livre-docente pela Escola de Comunicações e Artes da Universidade de São Paulo. Atualmente, e chefe da sucursal, em Brasília, do jornal Folha de S. Paulo.
World Wide Web e a publicidade digital. Um exame da situação da comunicação publicitária na Internet brasileira
Authors: Pinho José Benedito
Published: January 2017

Maior rede de computadores de todo o planeta, a Internet nasceu como plataforma de uso exclusivo de organizações governamentais, instituições de pesquisa e universidades...
Ludologia (Jogo #1/ Nível#1): do instinto aos jogos do Imaginário
Authors: Teixeira Luís Filipe B.
Published: January 2017

Com o presente artigo pretende-se iniciar a investigação sobre o tema do jogo como fenómeno cultural no interior de uma nova disciplina (embora com raízes nos anos 30) que é a Ludologia que, nos estudos anglo-saxónicos toma, usual e recentementemente, a designação de «Game Studies». Aqui, ao contrário do que é geralmente feito, estudando-se o jogo e, em especial, os vídeo-jogos e/ou jogos electrónicos (e a nomenclatura é, teoricamente, discutível), respectivamente, ora numa perspectiva semiótica, ética, psicanalatíca, estética, política, económica, sociológica ou mesmo de estudo de géneros, preocupamo-nos em estudá-lo de modo mais abrangente e geral, enquanto uma das categorias fundamentais ao humano, constitutiva do Ser e do Pensar, tocando, por isso mesmo,todas essas facetas e mais algumas outras. Neste artigo, o tema do jogo é tratado, essencialmente, por relação com os jogos do imaginário e da fabricação figurativa e miméticapresente, nomeadamente, no juízo estético, iniciando-se com a apresentação schillerianado «instinto de jogo» por relação com a ludicidade estética e a categoria do Belo, passandopela análise do «jogo das faculdades» kantiano e desembocando na noção goethiana de metamorfose. Por fim, abre-se a análise ao problema da linguagem e da proliferação (neopagã) de imagens por relação com a afecção maquínica, fazendo com que a indústria cultural de jogos faça corresponder o imaginário dos jogos com os nossos jogos do imaginário.
Produção, recepção e circulação do ‘novo’: um olhar sociológico sobre a invenção independente
Authors: Leite Carolina , Mota-Ribeiro Silvana
Published: January 2017

A abordagem do campo da invenção independente é aqui orientada a partir de noções como inovação, desenvolvimento técnico e circulação e recepção do ‘novo’. Partindo de uma perspectiva geo-sociológica da invenção, destacamos os factores favoráveis à emergência desta e dos modelos de desenvolvimento técnico-económicos que caracterizaram diferentes sociedades nos diferentes continentes, desde que há notícia de grupos sedentarizados. A recepção social da invenção e, em geral, do ‘novo’ tem suscitado diferentes respostas, da resistência à indiferença, passando pela sacralização.Na actualidade, os inventores independentes constituem uma franja minoritária da produção técnico-científica, assistindo-se a uma progressiva institucionalização do processo inventivo. Assim, interrogamos as razões que levam os inventores a perseverar numa actividade que se desenvolve à margem de qualquer vínculo institucional. Tal desvinculação reflecte-se no discurso dos entrevistados que salientam a desvalorização social de que são alvo. Esta persistência leva-nos a interrogar os factores avançados pelos próprios como potenciadores do gosto pela invenção.
Obstáculos à comunicação da ciência: o caso dos organismos geneticamente modificados
Authors: Oliveira Rui
Published: January 2017

Neste texto é abordado o tema dos organismos geneticamente modificados como exemplo das dificuldades de comunicação da ciência. Começa-se por reflectir sobre a atitude contraditória do público em relação à biotecnologia: apesar da aprovação destas tecnologias, há alguma relutância em aceitar a sua aplicação. De seguida, discutem-se alguns aspectos que tornam difícil a comunicação da ciência: a complexidade da informação, a sua quantidade e a chamada ‘mitificação do DNA’. Da complexidade e quantidade, resulta um conflito entre as linguagens jornalística e científica, dada a necessidade de explicações rápidas e simplificadas da comunicação social e o rigor da linguagem científica aplicado pela comunidade científica. Para um melhor debate público das questões científicas, é apontada a responsabilidade da comunidade científica que poderá desenvolver uma atitude mais didáctica relativamente a públicos não especializados. O papel da comunicação social também é salientado, através do contributo que jornalistas especializados poderão dar para ultrapassar os problemas presentes na comunicação pública da ciência.
Imprensa regional e políticas da comunicação: situação geral no quadriénio 1999-2002
Authors: Amaral Victor
Published: January 2017

A partir da inegável importância sociocultural da Imprensa Regional, faremos, neste artigo, uma breve incursão sobre as políticas de comunicação para este subsector em Portugal. Nomeadamente, no período do quadriénio 1999-2002 coincidente com a entrada em vigor de um novo regime de incentivos. Esta análise confrontará uma visão proteccionista do Estado, à qual estão “agarrados” grande parte dos cerca de novecentos títulos de imprensa local e regional, e uma visão liberal, que pressupõe novos desafios de inovação e criatividade empresarial. Das quais depende, em grande medida, a sobrevivência e o futuro da imprensa de proximidade.
Mesquita, Mário (2003) O Quarto Equívoco, O poder dos media na sociedade contemporânea, Coimbra: Minerva Coimbra
Authors: Sousa Helena
Published: January 2017

‘Este Quarto Poder está numa fase peculiar da sua evolução. Por um lado, está cada vez mais satisfeito com o poder que o corrompe; por outro, vai no sentido de uma impotência elefantina relativamente a todas as questões que realmente interessam’...
Strategical communication as a method
Authors: Horsle Pål B.
Published: January 2017

This article presents a way of thinking and planning strategic communications step by step. But even though the term step is used, the process must not always follow the sequence shown here. Often it may be necessary to go backwards and forwards to adjust the steps in relation to each other. This applies not least to the choice of target groups, the determination of sub-objectives, the selection of the main procedures and the level of ambition. But regardless of the sequence, no step should be omitted. The overall focus is effectiveness in order to what extent objectives is reached. This article is based upon my experience and as responsible for exercising approximately 50 strategies primarily within the public sector, in addition to use of The Norwegian Central Government Information Policy. Which is as a fact the only public information policy in the whole world which is implemented. Of this reason this article could be interpreted rather normative than empirical theoretic.
A modernização da identidade visual das Universidades. Os casos da Universidade da Extremadura (Espanha) e da Universidade do Minho (Portugal).
Authors: Ruão Teresa , Carrillo Maria Victoria
Published: January 2017

Os “activos intangíveis” – como a identidade, a imagem, a reputação ou a marca – têm uma importância crescente na gestão das Universidades. A emergência da chamada Sociedade do Conhecimento trouxe novos desafios à responsabilidade pública das instituições de ensino superior. E, em menos de uma geração, estas instituições entraram num contexto dito “de mercado”, onde a sustentabilidade exige a adopção de orientações de gestão mais empresariais. Neste contexto, os factores intangíveis surgem como elementos muito valiosos para as Universidades. Analisaremos, neste trabalho, o caso de duas instituições de ensino superior público – a Universidade da Extremadura em Espanha e a Universidade do Minho em Portugal. Constitui propósito deste trabalho reflectir sobre o papel da identidade na superação dos desafios que se colocam hoje às instituições de ensino superior (como a conquista de novos públicos ou a descoberta de novas formas de financiamento). Essa avaliação é feita a partir de um estudo dos programas de modernização da identidade visual das universidades citadas. Os resultados apontam para o entendimento da identidade visual como uma área catalisador do esperado desenvolvimento estratégico destas instituições.
Las constantes vitales de las relaciones públicas de vanguardia
Authors: Arceo Alfredo
Published: January 2017

Las relaciones públicas gozan, actualmente, de un importante auge gracias a la planificación y gestión de la disciplina desde una perspectiva bidireccional simétrica enfocada a resultados medibles y ponderables.Entre varios enfoques de investigación que permiten evaluar los resultados de las relaciones públicas, el mejor será aquel que valore las percepciones de las dos partes involucradas en cuanto a la relación y los comportamientos existentes entre los sujetos intervinientes. Otro elemento destacable para generar una relación estable y fructífera entre los actores, esto es, instituciones y públicos, es la visión de esta materia desde una perspectiva gerencial en la toma de decisiones de las cúpulas de poder de las organizaciones.A través de futuros aportes profesionales y/o académicos, y mediante la fusión de diversas investigaciones y teorías desarrolladas en Europa y en Estados Unidos de América, se logrará asignar el carácter científico tan necesario y buscado por esta disciplina.
Condiciones relacionadas con el desarrollo de septos en la cavidad abdominal de pacientes pediátricos en diálisis peritoneal
Authors: Patiño-García G , Sepúlveda-Hernández M T , Martínez-Sagredo E J , Barrera de León J C
Published: January 2017

INTRODUCCIÓN: en nuestro hospital la diálisis peritoneal es el método de sustitución renal de primera instancia. Los septos en la cavidad abdominal en niños con insuficiencia renal crónica son complicaciones por repetidos cuadros de peritonitis.OBJETIVO: determinar las condiciones relacionadas con el desarrollo de septos en la cavidad abdominal en pacientes pediátricos con diálisis peritoneal.MATERIALES Y MÉTODOS: estudio observacional retrospectivo, de marzo del 2012 a octubre del 2014, incluyendo pacientes pediátricos con enfermedad renal crónica con diálisis peritoneal. Los septos fueron diagnosticados por medio de ultrasonido abdominal. Estadística inferencial con exacta de Fisher y U de Mann Whitney, asociación de riesgo con razón de momios (OR). Se incluyeron 60 pacientes en dos grupos: con septos (n=20) y sin septos (n=40): sexo masculino n=11 (55%) y n=25 (62%); edad en años (mediana) 8 (0.5-15) y 9 (0.5-16),respectivamente (p = 0.756); duración de diálisis (mediana) 12 (4 60) y 16 (2-81) meses, también respectivamente (p = 0.653). RESULTADOS: no se encontró la causa de la insuficiencia renal en 13 (65%) de los pacientes del grupo con septos y en 25 (62%) del grupo sin septos; factores relacionados: solución glucosada hiperosmolar n=5 (25%) y n=11 (28%) (p = 0.917); cirugía abdominal posterior a Tenkoff n=3 (15%) y n=7 (18%); cuadros de peritonitis n=20 (100%) y n=29 (72%) (p = 0.025); necesidad de tratamiento sistémico n=19 (95%) y n=22 (55%) (p = 0.004), todos los datos para los grupos con y sin septos, respectivamente. CONCLUSIONES: dos o más eventos de peritonitis y necesidad de tratamiento sistémico son factores relacionados con el desarrollo de septos abdominales en niños con insuficiencia renal crónica en diálisis peritoneal.
Estudio químico de la fracción de acetato de etilo del hongo Ganoderma lucidum cultivado en desechos agroindustriales
Authors: Salgado Ordosgoitia Rodrigo Daniel , Arias Martínez Johanna Milena , Acosta Chavez Amparo Del Cristo , Rodriguez - Manrique Jhonatan Andres , Pérez Pérez Mario Frank
Published: January 2017

Estudios en hongos han revelado que poseen un alto valor nutricional, comprobada acción farmacológica de los metabolitos secundarios producidos en sus cuerpos fructíferos, siendo muchas las especies estudiadas, destacando entre estas el hongo macromiceto Ganoderma Lucidum, del cual se han aislado compuestos tipo lanostenoides y terpenoides, de importancia química y biológica, mostrando efectividad en la disminución de la presión sanguínea, propiedades antinflamatorias, antivirales, hipoglicémicas e inmunoprotectoras. Por otro lado, el cultivo de hongos promueve la solución a problemas de tipo ambiental, ya que puede hacerse en desechos agroindustriales. El objetivo fue estudiar la composición química del hongo Ganoderma Lucidum, cultivado en desechos agroindustriales y determinar diferencias entre los metabolitos obtenidos, con respecto a los de la especie del hongo en su estado silvestre. Para ello, se cultivó Ganoderma Lucidum, en desechos agroindustriales y  se estudió químicamente la fracción de acetato de etilo (AcOEt), mediante cromatografía de columna (CC), cromatografía de capa fina (CCF), cromatografía en capa gruesa (CCP). Además de técnicas de análisis de estructuras CG-EM, RMN-1H, IR. Los resultados indicaron que se obtuvieron 674 fracciones, agrupadas como A-L por comportamiento cromatográfico similar, de estas se estudiaron las fracciones B, F e I, las cuales se sometieron a análisis espectroscópicos para elucidar las estructuras presentes, obteniéndose un total de siete compuestos presentes en ambas especies. De forma general, se puede concluir que al comparar el hongo cultivado con la especie silvestre, se establece que presentan una composición de metabolitos secundarios similar, donde el compuesto mayoritario fue el Ganoderiol B. © 2016. Acad. Colomb. Cienc. Ex. Fis. Nat.
Análise semiolinguística do gênero editorial
Authors: Freitas Ernani Cesar de , Fumagalli Rita de Cássia Dias Verdi
Published: January 2017

RESUMO:

Este estudo de caráter descritivo-qualitativo reflete sobre o discurso de um texto do jornal Zero Hora (ZH) caracterizado como editorial jornalístico. O marco teórico e metodológico de análise fundamenta-se na perspectiva semiolinguística de Patrick Charaudeau (2009, 2014, 2015), com o objetivo de descrever e analisar os procedimentos linguísticos pelos quais o jornalista imprime suas marcas no enunciado. Constatamos, através das pistas situacionais encontradas no gênero de informação midiática em análise, que as marcas do sujeito comunicante (EUc), a ideologia e a visão de mundo são inerentes ao texto e ao discurso, essas marcas são estratégias utilizadas pelo sujeito enunciador (EUe) que contribuem para persuadir o leitor e convencê-lo da veracidade do que diz.

PALAVRAS-CHAVE: Análise Semiolinguística; Gênero Editorial; Discurso Jornalístico; Zero Hora.
A concepção de aula como acontecimento e as práticas de multiletramento: um discurso pedagógico polêmico
Authors: Rezende de Oliveira Barboza Sandra Noeli , Teno Neide Araujo Castilho , Freitas Silvane Aparecida
Published: January 2017

RESUMO:

O objetivo deste artigo é realizar um estudo teórico acerca da concepção de aula como acontecimento e a relação com a Pedagogia dos Multiletramentos, propondo uma reflexão acerca do discurso pedagógico. Dessa relação emerge um discurso polêmico, envolvendo professores e alunos como interlocutores, produtores e coprodutores de seus discursos, dentro e fora das salas de aula. Como metodologia de pesquisa, recorremos à pesquisa explanatória de cunho bibliográfico com teóricos como: Bakhtin (1996), Geraldi (2015), Rojo (2012), Orlandi (1996) e outros. Nessa perspectiva a reflexão sobre a aula torna-se uma possibilidade de discussão das novas práticas pedagógicas, de Língua Portuguesa no Ensino Médio.

PALAVRAS-CHAVE: discurso pedagógico polêmico; acontecimento; multiletramentos;
Colégio Estadual Governador Luiz Viana Filho (1956-1994): história, arquivo escolar e produção de catálogo de fontes
Authors: Souza Maryana Gonçalves , Miguel Antonieta
Published: January 2017

O presente texto é resultado do projeto Colégio Estadual Governador Luiz Viana Filho: instituição, arquivo escolar e possibilidades de pesquisa (1956-1994), com apoio financeiro do PICIN/UNEB que almeja conhecer, inventariar e catalogar os documentos da instituição e produzir um Catálogo de Fontes Primárias, apresentando a documentação pesquisada e suas possibilidades de pesquisa em História da Educação. Os documentos foram levantados e catalogados, realizando a análise do seu conteúdo e seu estado. Depois se realizou a produção escrita e gráfica do Catálogo. A pesquisa desenvolvida permitiu visualizar a potencialidade das instituições escolares e seus arquivos e a situação crítica deste local, necessitando descontruir a invisibilidade social perante os espaços escolares e seu patrimônio.
VIABILITAS BENIH PURWOCENG (Pimpinella pruatjan) PADA BERBAGAI PERLAKUAN STIMULASI PERKECAMBAHAN
Authors: Rusmin Devi , Darwati Ireng , Suwarno Faiza C , Ilyas Satriyas
Published: January 2017

Permasalahan dalam perbanyakan tanaman purwoceng adalah viabilitas benih yang sangat rendah (≤ 20%). Untuk mengatasi permasalahan tersebut dilakukan penelitian yang bertujuan mendapatkan metode stimulasi per-kecambahan yang dapat meningkatkan viabilitas dan vigor benih purwoceng. Penelitian dilaksanakan di Laboratorium Fisiologi Tanaman, Balai Penelitian Tanaman Rempah dan Obat, Bogor, sejak Juli sampai November 2009. Rancangan yang digunakan adalah rancangan acak lengkap (RAL), satu faktor dengan empat ulangan. Perlakuan yang diuji adalah stimulasi perkecambahan yang terdiri atas 13 macam yaitu: T1=kontrol, (2) T2=stratifikasi dengan suhu 100C (2 minggu), (3) T3=stratifikasi dengan suhu 5-100C (4 minggu), (4) T4=penyimpanan kering pada suhu ruang (2 minggu), (5) T5=penyimpanan kering pada suhu ruang (4 minggu), (6) T6=pencucian dengan air mengalir (24 jam), (7) T7=pencucian dengan air mengalir (48 jam), (8) T8=imbibisi dengan GA3 100 ppm (24 jam), (9) T9=imbibisi dengan  GA3 200 ppm (24 jam), (10) T10=imbibisi dengan GA3 400 ppm (24 jam), (11) T11=imbibisi dengan KNO3 0,2% (24 jam), (12) T12=pemanasan pada suhu 500C (24 jam), dan (13) T13=pemanasan pada suhu 500C (48 jam). Hasil penelitian menunjukkan stimulasi perkecambahan dengan pemanasan suhu 50°C selama 48 jam merupakan perlakuan terbaik dalam meningkatkan viabilitas dan vigor benih purwoceng dengan daya berkecambah 51,5% dan kecepatan tumbuh benih 1,74% etmal-1 dari semua perlakuan yang diuji. Hasil tersebut mengindikasikan masih perlu penelitian peningkatan viabilitas benih purwoceng untuk mendukung pengembangan tanaman purwoceng di Indonesia. Beberapa langkah yang dapat dilakukan untuk meningkatkan viabilitas benih purwoceng selanjutnya adalah: (1) menggabungkan metode pemanasan dengan pemberian GA dan (2) menggabungkan metode pemanasan dengan penyimpanan kering pada 18-20°C.
Improving Quantitative Analysis of Frac-Hits and Refracs in Unconventional Plays Using RTA
Authors: Yadav Himanshu , Motealleh Siyavash
Published: January 2017

One of the most common field development plans in shale plays involves drilling lease/acreage retention wells in different areas followed by coming back and drilling infill wells. In majority of these shale plays, job sizes for hydraulic fracturing treatment are getting bigger over time in order to achieve more volume as well as value. However, due to depletion, there exists a pressure sink around the older existing producers and that significantly increases the possibility of older well getting "frac-hit" by new stimulation, and receiving large volume of frac fluid. Frac-hits can easily be seen using pressure gauges in older wells, and other surveillance techniques including chemical/RA tracers, microseismic, etc. One of the other "interference" effects that change the behaviour of parent well is refracturing. Operators are identifying candidates that were either poorly stimulated initially or have lost productivity over their life, and are refracturing those wells. In both frac-hits and refracs, there is a change in well productivity; and understanding and quantifying this loss/gain in production still remains challenging.

In this paper, both analytical and numerical modeling techniques were used to explore the existing workflows and techniques in the literature to study frac-hits and refracs. Rate transient analysis (RTA) was used to complement the numerical reservoir simulation models. Flow regimes were identified on superposition time plots using RTA (linear flow regime, boundary-dominated regime), and numerous sensitivities were run on the frac-hit/refrac timing, reservoir matrix permeability. Frac-hit examples from Eagle Ford shale were examined.

This paper studies the existing RTA techniques to model frac-hits/refracs and compares them with the new technique proposed herein. It was observed that RTA models needed to be re-initialized to model post frac-hit or refrac behaviour to correctly quantify the changes in SRV. It is shown that although the existing techniques work reasonably well at low matrix permeability, the error margin goes up as the permeability increases. In Eagle Ford, the permeability is high enough to warrant using this new analysis method.

Existing analyses methods primarily use diagnostic plots (superposition time) and are only applicable to frac-hits or refracs prior to boundary dominated flow (BDF) regime. This proposed method is valid over different flow regimes & larger permeability ranges. The analysis method recommended in this study allows the operators to better analyse the efficiency and benefits of their refracs, as well as detrimental impact of frac-hits from infilling and downspacing the wells.
Long Term Conductivity vs. Point Specific Conductivity
Authors: Renkes I. , Anschutz D. , Sutter K. , Rickards A.
Published: January 2017

Long term conductivity of proppants, currently defined by API RP 19D, has been used since the early 1970's as the standard for evaluating the conductivity and permeability of proppants for use in hydraulic fracturing. Proppants are typically tested across their useful range in 2,000-psi (137.89-bar) increments (i.e. 2-4-6-8K-psi…) and held 50 hours at each stress level, ramp rates between each stress and the test temperatures are also defined by API RP 19D. Frac sand is tested at 150°F (65.5°C) and ceramic proppants at 250°F (121.11°C). Proppant suppliers use this, among other testing parameters, to develop data to market their products to the industry. As with any standard, the test has its limitations. The test is expensive, time consuming and in many cases does not match the application.

Point specific 50 hour (PS50) conductivity tests follow the procedures outlined in API RP 19D but use a point specific stress and point specific temperature, modeling a specific application. Although not yet sanctioned by the API, the test can generate meaningful data in less time, for a specific purpose and save money. Point specific testing has maximized Research & Development budgets and increased the time to market for new products. Operators have benefited by tailoring proppants for their specific well conditions.

In this work we plan to compare point specific test data to API RP 19D data over a range of stress and time as the industry pushes the envelope on the applicable stress for proppants. Aven, Tang and Weaver brought out that "it is normal to observe a continuous decline in conductivity, although less than 5% on a daily basis, if the measurement is carried longer than two days. It is rare that the system actually achieves equilibrium conductivity during that time, but the rate of change of conductivity does slow down1."

Could the point specific test be extended to achieve equilibrium and still be comparable to existing data from the standardized test? Multiple tests were conducted to compare these two methods of conductivity tests at normal duration, a point specific 50 hour (PS50) conductivity test and the API RP 19D conductivity test which the test spends 50 hours at each 2,000 psi (137.89-bar) increment. Results presented in this paper will help answer these questions and aid engineers make more informed decisions faster and with a lower economic cost.
Development of a Universal Ranking for Friction Reducer Performance
Authors: Tomson Ross C. , Guraieb Paula , Graham Shane , Yan Chao , Ghorbani Nasser , Hanna Ty , Cooper Cal
Published: January 2017

In hydraulic fracturing, large amounts of water are pumped at high speed down the wellbore. To reduce pump pressure and costs, a friction reducer is added to the stream. There is currently no unified performance criteria for selection of friction reducers. This work outlines the methodology for producing such a unified method of comparing performance between any friction reducer chemical additives, both liquid and dry powder.

A 0.5 inch stainless steel high-flow low-shear flow loop pumping at ranges between three and twenty gallons per minute was custom-built. The loop uses a Coriolis flow meter, two absolute pressure transducers, and one differential pressure transducer to accurately determine the friction reducer additive performance in any given fluid by measuring pressure drop across a section of developed flow. This paper utilizes over 400 in-house flow loop tests to establish a novel unified ranking system for the evaluation of friction reducers’ performance. The ranking is independent of the type of friction reducer used and quality of water. Produced waters, fresh water, treated produced waters, and synthetic waters were all used to validate the methodology and ranking system to create a unified criteria to compare performance of any friction reducers.

Tomson Technologies created a standardized metric for assessing and ranking friction reducer performance. This standardization was achieved through the use of an unique performance scale comprised of the weighted average of the most important friction reduction parameters of a friction reducer in any produced water: (1) inversion time (InvT), (2) maximum percent friction reduction (Max% FR), (3) time to sustain maximum percent friction reduction (RetT@%Avg.FRmax), and (4) the percent friction reduction at the end of 500 seconds (% FR@500s). 500 seconds is used because fluid during hydraulic fractures travels from the pumps to the reservoir in 500 or fewer seconds in almost all cases. This scale is measured in a new unit called "Friction Reducer Units" (FRU), which ranges from 0 to 10. FRU has been used to rank and correlate the performance of different classes of friction reducers in various types of waters, resulting in a comprehensive results database and is used to show applicability of the overall metric.
Advanced Reservoir Characterization in Antelope Shale Using Chemical Tracer Technology
Authors: Lal Manish K. , Singh Amit K. , Ezernack Joshua , Spencer Jon
Published: January 2017

Understanding zonal contribution is imperative in a well with comingled production from multiple stimulated zones. This has even more importance in shale plays where a primary appraisal objective is to identify the prolific zones with a vertical well to decide which layers of the formation will be targeted for future development. The use of measured inflow over time of each targeted zone provides an excellent methodology to establish zonal contribution and wellbore evaluation.

The Monterey Formation in the southern San Joaquin valley of California produces from three silica phases. While the industry has been pretty successful in producing from the shallow Diatomite rock via cyclic steam operations, the deeper silica-based resources available in the Antelope Shale have yet to be commercially established. Extracting hydrocarbons locked in these silica phases requires unconventional technologies to access the high porosity / low permeability network. Unconventional completions require greater front-end cost and carry an increased risk to return on investment. To minimize the risk, each pay zone needs to be effectively described using both theoretical and empirical data.

In this paper, we present and discuss a case study where chemical-based tracer technology was used to develop an accurate identification of the distinct pay zones within the different silica phases of the Antelope Shale. Unique oil-phase chemical tracers were applied during the permitted hydraulic fracturing on four vertical wellbores that gave an insight into the zonal production contribution and helped narrow potential zones for future development. In comparison to tool based zonal contribution measurement methods, which provide a snapshot in time measurement, the chemical tracers provided the capability to monitor and measure inflow over a longer period indicating that zonal contribution varied with time. Some formation layers produced immediately and then declined, while others took longer to cleanup and start contributing to total production. These results helped narrow the uncertainty around the potential target zones.