In-situ evaluation of predictive models for H₂S gas emission and the performance of optimal dosage of suppressing chemicals in a laboratory-scale sewer

This in-situ analysis quantifies hydrogen sulfide gas emission from a simulated sewerage system, with varying slopes between 0.5% and 1.5%, under the dosing of certain mitigating chemicals. A portable H₂S gas detector (OdaLog) was employed to record the gaseous phase concentration of hydrogen sulfide. The investigation was comprised of three interrelated phases. In the first stage, precision of four prediction models for H₂S gas emission from a laboratory-synthesized wastewater was assessed. It was found that the model suggested by Lahav fitted the experimental results accurately. Second phase explorations included jar tests to obtain the optimal dosage of four hydrogen sulfide suppressing chemicals, being Mg(OH)₂, NaOH, Ca(NO₃)₂, and FeCl₂. In the third stage, the optimal dosage of chemicals was introduced into the experimental sewerage system, with the OdaLog continuously monitoring the H₂S gas emission. According to a baseline (experiments with no chemical addition), it was found that NaOH and Mg(OH)₂ performed very good in mitigating the release of H₂S gas, while Ca(NO₃)₂ was not effective most probably due to the absence of biological activity. Furthermore, interpretation of OdaLog data through the optimum emission prediction model revealed that higher sewer slope led to more emission.

Online and internet-based technologies: gaming

There are high expectations of the educational value of online games and immersive, virtual worlds. Digital games, if used for educational purposes, it is argued, have the capacity to transform learning, engage disenchanted students, address major differences in experience and orientation in out-of-school and in-school contexts, teach twenty-first-century literacies and prepare learners to become tech savvy, critical and agential participants – ‘knowledge workers’ (Gee et al., 1996) – in a technologically saturated world. As governments and other institutions seek to respond to rapid and massive technological change, the use of games-based learning via online and mobile Internet-based technologies is seen as providing much potential for innovative, effective and accessible contemporary teaching and learning. While there is considerable enthusiasm for the use of games to support learning, however, research focusing on these areas is fragmented and provides a more mixed picture of their use.Games studies as an interdisciplinary field is informed by quite different research traditions and trajectories, each with its own epistemological framework and assumptions. In this chapter, the focus is on games and learning as they relate to formal educational contexts, particularly schools. The chapter begins with an overview of some of the key issues and assumptions related to the use of online games for educational purposes. This is followed by a discussion of four major disciplinary orientations towards games: perspectives and approaches drawn from humanities and social science; explorations of literacy and media production from media and cultural studies; the study of games themselves within the formally designated, eponymous area of games studies; and technical and educational approaches based in the fields of e-learning and instructional design. This section concludes with an extended discussion of the use of Second Life, which canvasses the main approaches to its use, and goes on to provide a detailed account of the use of Second Life to foster argumentative knowledge construction in Singapore secondary schools (Jamaludin et al., 2009). This is followed by an account of ongoing tensions between research traditions and a discussion of issues for further development and insights for the future. The chapter concludes with a summary of key points and suggestions for further reading in the games and learning area.

The design philosophy of Edenic gardens: tracing ‘Paradise Myth’ in landscape architecture

This paper explores the Eden mythology in both western and eastern cultures, and its reflection on people’s perception and use of nature. It aims to examine how cultural ideologies and systems of beliefs in relation to Eden have affected landscape making and how landscape icons influenced other cultures subsequently. This study describes how narratives of Eden evolved and influenced landscape design by explaining the narratives of Paradise and Arcadia in eastern and western cultures as two distinct landscape narratives, with a brief history of their emergence and evolution. It discusses the ways in which landscape architecture reflects the prevailing attitudes towards nature in a society by studying the ancient world’s philosophies and ideologies as a starting-point for this investigation. The paper then focuses on the Persian paradise garden and explains the notion of iconography, as a visual explanation of an idea in landscape design. It projects the transformation of Persian paradise gardens’ icons and patterns in landscape architecture through historical and spatial explorations.

Introduction : why are discursive approaches to language policy necessary?

This volume is a series of explorations of language policy from a discursive perspective. Its chief aim is to systematically explore the interconnectedness of language policy and discourse through what we are terming ‘discursive approaches to language policy’ (DALP). We show that language policy is a multilayered phenomenon that is constituted and enacted in and through discourse (which is defined more closely in Sect. 1.2). Language policy is a fast-growing, vibrant, and interdisciplinary field of inquiry that offers a variety of theoretical frameworks, methodologies, analytic approaches, and empirical findings: the framing sections at the beginning of each part of this volume and the commentary at the end frame the discussion of developments in language policy and especially the role of DALP therein.

La litterature francophone de l’Afrique subsaharienne en Suède : Les Femmes font place à la honte

The aim of the article is to present the place and the role of contemporary Francophone Sub-Saharan African literature in Sweden. This study attempts to compare three levels in the circulation of literary works: translation, reception, and content. These dimensions converge in the analysis in order to pin down the place and the role of this literature in the Swedish context. The study is delimited to writers born after the independencies. The results show that contemporary francophone novels translated and categorized as African are dominated by female writers. The critique reveals a semantic field stressing the theme of shame in the novels by these six female authors, which is examined through in-depth analysis of one novel from each author. Preliminary conclusions are that Francophone African literature is present on the Swedish market since the independencies and even before, though, contemporary works translated into Swedish are produced in the diaspora. A comparison between the three studied levels show that female writers contribute to the shaping of African literature in Sweden to a great extent, even though literary critics sometimes judge them severely. Their explorations of aesthetic forms marry a new discretely engaged literature, constructive rather than vindictive. In this literature, the core issue of facing the shame is presented as a way to reach individual and collective dignity.

Quotidian metageographies: prose poems as nonfiction postcards

The prose poem is a flexible vehicle that is often used, in a range of guises, to drive explorations and excavations of the quotidian.

New perspectives on the annihilation electrogenerated chemiluminescence of mixed metal complexes in solution

Preliminary explorations of the annihilation electrogenerated chemiluminescence (ECL) of mixed metal complexes have revealed opportunities to enhance emission intensities and control the relative intensities from multiple luminophores through the applied potentials. However, the mechanisms of these systems are only poorly understood. Herein, we present a comprehensive characterisation of the annihilation ECL of mixtures of tris(2,2′-bipyridine)ruthenium(ii) hexafluorophosphate ([Ru(bpy)3](PF6)2) and fac-tris(2-phenylpyridine)iridium(iii) ([Ir(ppy)3]). This includes a detailed investigation of the change in emission intensity from each luminophore as a function of both the applied electrochemical potentials and the relative concentrations of the two complexes, and a direct comparison with two mixed (Ru/Ir) ECL systems for which emission from only the ruthenium-complex was previously reported. Concomitant emission from both luminophores was observed in all three systems, but only when: (1) the applied potentials were sufficient to generate the intermediates required to form the electronically excited state of both complexes; and (2) the concentration of the iridium complex (relative to the ruthenium complex) was sufficient to overcome quenching processes. Both enhancement and quenching of the ECL of the ruthenium complex was observed, depending on the experimental conditions. The observations were rationalised through several complementary mechanisms, including resonance energy transfer and various energetically favourable electron-transfer pathways.

Chunky Move review: Lucid dances nimbly between performance and film

While the integration of media content with live performance is nothing new, it is perhaps an increasing awareness of the pervasiveness of screens in our daily lives that has inspired a recent trend in Melbourne contemporary dance towards explorations that bring the two together.

Actividad física e imagen corporal: conceptos y enfoques desde la equidad-inequidad en salud

Este trabajo rastrea el tratamiento dado a las categorías Actividad Física e Imagen Corporal en una selección de textos científicos del área de la salud; revisa la relación entre categorías y examina si en dichos textos son abordadas desde el enfoque de los Determinantes Sociales de la Salud o desde el enfoque de la Determinación Social de la Salud, usando la categoría de equidad como parámetro y explorando las implicaciones de ello. Su paradigma epistemológico es la construcción social del conocimiento y el eje metodológico el análisis de contenido. Los resultados muestran una construcción insipiente de las categorías, una relación diversa entre ellas y un privilegio del enfoque de los determinantes sociales de la salud en los textos académicos. Finalmente, el trabajo indaga sobre las implicaciones prácticas mediante un análisis de contenido de dos documentos de la OMS. Se concluye que en la práctica sí se reflejan las diferencias de enfoque.

El legado de los flujos migratorios hacia la península de Crimea entre 1860 – 1991 en la crisis política de 2014

La presente investigación propone un análisis sobre la crisis política de Crimea en 2014 a partir del influjo que las migraciones desde Rusia han tenido en la historia reciente. Así, a partir de la evaluación de algunos de los momentos de inmigración más representativos en los últimos dos siglos (1860, 1928 y 1991) se vincula el proceso de construcción de la identidad de los inmigrantes -transversal en diferentes periodos históricos en Crimea- con el desarrollo de los eventos de 2014. Lo anterior permite identificar un cierto legado de la migración hacia Crimea en el desarrollo de la crisis, cuyo resultado principal ha sido la anexión de facto de Crimea a Rusia. Ésta no habría sido posible sin el particular ánimo de afinidad con la idea de Rusia –o Russianness- de la mayoría de los habitantes de la península, cuya presencia en la región se explica en parte, a través de los procesos migratorios antes descritos.

Los mecanismos de influencia en el liderazgo: dos estudios de caso

Este trabajo investigativo busca aportar a la literatura sobre las tácticas de influencia en el liderazgo. Surge como una aplicación, a dos casos específicos, del proyecto de investigación “Los mecanismos de influencia en la relación de liderazgo”, desarrollado por el profesor Juan Javier Saavedra Mayorga e inscrito en la línea de investigación en Estudios Organizacionales del Grupo de Investigación en Dirección y Gerencia. La investigación tiene como objetivo fundamental identificar las tácticas de influencia que utilizan dos líderes organizacionales en su trato cotidiano con sus colaboradores, así como la reacción de estos últimos ante dichas tácticas. El proyecto parte de una revisión teórica sobre tres elementos: el liderazgo, la influencia y el poder, y las reacciones de los colaboradores frente a las tácticas de influencia utilizadas por el líder. La estrategia metodológica empleada es el estudio de caso. El trabajo de campo se desarrolló en dos organizaciones: Microscopios y Equipos Especiales S.A.S. y Tecniespectro S.A.S. La técnica de recolección de información es la entrevista semi estructurada, y el método de análisis de información es el análisis de contenido temático.

Itinerarios burocráticos y ciudadanía transitoria: un acercamiento al desplazamiento Emberá en Bogotá.

Del año 2013 al 2015, los indígenas Emberá desplazados en Bogotá, a causa del reconocimiento que el estado les dio por ser sujetos del desplazamiento, estuvieron obligados a encarar dos formas de gubernamentalidad estatal que tuvieron múltiples consecuencias en su vida cotidiana. La primera de estas formas de gubernamentalidad se manifestó en una ciudadanía multicultural (aquí llamada ciudadanía transitoria) la cual, desde el subsidio de vivienda reconocido con albergues en la ciudad, limitó diferentes derechos Emberá bajo el argumento multicultural de que en la ciudad la cultura y, ellos mismos físicamente, eran vulnerables. La consecuencia de este discurso, con el que se les permitió dormir en un techo digno, fue la de obligarlos en buena medida a asumir su vida en la ciudad como un transito hacia el retorno a su territorio de origen, desde donde habían salido, sobre todo, huyendo de la violencia. Por otra parte, la segunda forma de gubernamentalidad tuvo que ver con una serie de itinerarios burocráticos que asumían los Emberá una vez llegaban a la ciudad. Estos eran recorridos que emprendían por diferentes burocracias de los gobiernos nacional y local con el propósito de exigirle al estado el reconocimiento de sus derechos. En cada uno de estos recorridos se desenmascaraba una forma de violencia estatal (característica del funcionamiento de las burocracias) que, como se puede ver en esta tesis, tenía profundas repercusiones en el día a día de los indígenas Emberá dentro de la urbe.

Aproximaciones a mindfulness en la psicología contemporánea

Este trabajo es una revisión de literatura que abarca una selección de artículos disponibles en bases de datos especializadas y publicados en el periodo comprendido entre los años 2006 a 2016 para artículos científicos y entre los años 2000 a 2016 para libros. En total se revisaron: 1 tesis doctoral, 1 tesis magistral, 111 artículos y 9 libros o capítulos de libros. Se presentan diversas definiciones de mindfulness y formas de conceptualizarla, sus mecanismos de acción, sus enfoques psicoterapéuticos predominantes, los efectos de su práctica estable, sus principales campos de acción y la importancia de la formación de los docentes que imparten la práctica. Finalmente se presentan algunas conclusiones acerca del diálogo entre la literatura psicológica sobre mindfulness y algunas de las concepciones de la tradición budista en torno a la meditación.