Towards structured, block-based PDF

The Portable Document Format (PDF), defined by Adobe Systems Inc. as the basis of its Acrobat product range, is discussed in some detail. Particular emphasis is given to its flexible object-oriented structure, which has yet to be fully exploited. It is currently used to represent not logical structure but simply a series of pages and associated resources. A definition of an Encapsulated PDF (EPDF) is presented, in which EPDF blocks carry with them their own resource requirements, together with geometrical and logical information. A block formatter called Juggler is described which can lay out EPDF blocks from various sources onto new pages. Future revisions of PDF supporting uniquely-named EPDF blocks tagged with semantic information would assist in composite-pagemakeup and could even lead to fully revisable PDF.

Close encounters: international exhibitions and the material culture of the British Empire, c.1880-1940

Apparitions of empire and imperial ideologies were deeply embedded in the International Exhibition, a distinct exhibitionary paradigm that came to prominence in the mid-nineteenth century. Exhibitions were platforms for the display of objects, the movement of people, and the dissemination of ideas across and between regions of the British Empire, thereby facilitating contact between its different cultures and societies. This thesis aims to disrupt a dominant understanding of International Exhibitions, which forwards the notion that all exhibitions, irrespective of when or where they were staged, upheld a singular imperial discourse (i.e. Greenhalgh 1988, Rydell 1984). Rather, this thesis suggests International Exhibitions responded to and reflected the unique social, political and economic circumstances in which they took place, functioning as cultural environments in which pressing concerns of the day were worked through. Understood thus, the International Exhibition becomes a space for self-presentation, serving as a stage from which a multitude of interests and identities were constructed, performed and projected. This thesis looks to the visual and material culture of the International Exhibition in order to uncover this more nuanced history, and foregrounds an analysis of the intersections between practices of exhibition-making and identity-making. The primary focus is a set of exhibitions held in Glasgow in the late-1880s and early-1900s, which extends the geographic and temporal boundaries of the existing scholarship. What is more, it looks at representations of Canada at these events, another party whose involvement in the International Exhibition tradition has gone largely unnoticed. Consequently, this thesis is a thematic investigation of the links between a municipality routinely deemed the ‘Second City of the Empire’ and a Dominion settler colony, two types of geographic setting rarely brought into dialogue. It analyses three key elements of the exhibition-making process, exploring how iconographies of ‘quasi-nationhood’ were expressed through an exhibition’s planning and negotiation, its architecture and its displays. This original research framework deliberately cuts across strata that continue to define conceptions of the British Empire, and pushes beyond a conceptual model defined by metropole and colony. Through examining International Exhibitions held in Glasgow in the late-Victorian and Edwardian periods, and visions of Canada in evidence at these events, the goal is to offer a novel intervention into the existing literature concerning the cultural history of empire, one that emphasises fluidity rather than fixity and which muddles the boundaries between centre and periphery.

The cytokinesis-block micronucleus (CBMN) assay in human populations exposed to styrene: a systematic review and meta-analysis

Styrene is a building-block of several compounds used in a wide array of materials and products. The most important human exposure to this substance occurs in industrial settings, especially among reinforced-plastics industry workers. The effect of occupational exposure to styrene on cytogenetics biomarkers has been previously reviewed with positive association observed for chromosomal aberrations, and inconclusive data for the micronucleus assay. Some limitations were noted in those studies, including inadequate exposure assessment and poor epidemiological design. Furthermore, in earlier studies micronuclei frequency was measured with protocols not as reliable as cytokinesis-block micronucleus (CBMN) assay. Aim of the present systematic review and meta-analysis is to investigate genomic instability and DNA damage as measured by the CBMN assay in lymphocytes of subjects exposed to styrene. A total of 11 studies published between 2004 and 2012 were included in the meta-analysis encompassing 479 styrene-exposed workers and 510 controls. The quality of each study was estimated by a quality scoring system which ranked studies according to the consideration of major confounders, exposure characterization, and technical parameters. An overall increase of micronuclei frequencies was found in styrene-exposure workers when compared to referents (meta-MR 1.34; 95% CI 1.18–1.52), with significant increases achieved in six individual studies. The consistency of results in individual studies, the independence of this result from major confounding factors and from the quality of the study strengthens the reliability of risk estimates and supports the use of the CBMN assay in monitoring genetic risk in styrene workers.

Extracting reusable document components for variable data printing

Variable Data Printing (VDP) has brought new flexibility and dynamism to the printed page. Each printed instance of a specific class of document can now have different degrees of customized content within the document template. This flexibility comes at a cost. If every printed page is potentially different from all others it must be rasterized separately, which is a time-consuming process. Technologies such as PPML (Personalized Print Markup Language) attempt to address this problem by dividing the bitmapped page into components that can be cached at the raster level, thereby speeding up the generation of page instances. A large number of documents are stored in Page Description Languages at a higher level of abstraction than the bitmapped page. Much of this content could be reused within a VDP environment provided that separable document components can be identified and extracted. These components then need to be individually rasterisable so that each high-level component can be related to its low-level (bitmap) equivalent. Unfortunately, the unstructured nature of most Page Description Languages makes it difficult to extract content easily. This paper outlines the problems encountered in extracting component-based content from existing page description formats, such as PostScript, PDF and SVG, and how the differences between the formats affects the ease with which content can be extracted. The techniques are illustrated with reference to a tool called COG Extractor, which extracts content from PDF and SVG and prepares it for reuse.

Tau Functions and the Limit of Block Toeplitz Determinants

International audience

Eighteenth-century type in the roal printing office

Tese apresentada na Faculdade de Arquitetura da Universidade de Lisboa, para obtenção do grau de Doutor em Design

Programa de gestión de seguridad y salud ocupacional para la empresa Celo-Block, S.A. de C.V., ubicada en el municipio de Guazapa departamento de San Salvador.

La empresa Celo- Block S.A. de C.V. a lo largo de su historia como centro de trabajo, cuenta con numerosos casos de accidentes de trabajo, por la falta de un programa dirigido a la prevención de riesgos ocupacionales. Es por ello, que se ha considerado diseñar un Programa de Gestión de Seguridad y Salud Ocupacional, teniendo como base principal los lineamientos contenidos en los artículos 8 y 13 de la Ley General de Prevención de Riesgos en los Lugares de Trabajo. Todo ello con la intención de proteger a los trabajadores enfocando la investigación en el análisis de las condiciones físicas actuales, en materia de Seguridad y Salud Ocupacional. La Seguridad y Salud Ocupacional aplicada a los lugares de trabajo tiene como objetivo salvaguardar la vida de los trabajadores, a la vez proteger la salud y la integridad física de los mismos, por medio de la puesta en práctica de medidas encaminadas a proporcionar condiciones óptimas en el trabajo. Por lo que la Seguridad y Salud Ocupacional debería ser uno de los puntos clave de cualquier empresa. Dicha propuesta busca como objetivo principal, mejorar el ambiente de trabajo, y contribuir a la reducción de accidentes que pueden lesionar a los trabajadores. Por medio de la elaboración de una política que sirva de guía para la prevención de accidentes ocupacionales, según lo establece la Ley General de Prevención de Riesgos en los Lugares de Trabajo. La metodología utilizada en la investigación, consistió en la elaboración de un diagnóstico, que permitió conocer la situación actual en materia de Seguridad y Salud Ocupacional en la empresa, el método de investigación que se implementó fue el análisis, el tipo de investigación que se realizó fue el descriptivo, el diseño de la investigación fue la no experimental, y las fuentes de investigación fueron las primarias y secundarias y se logró a través de las técnicas de investigación como entrevista, encuestas, y observación directa, realizar un mapa de riesgos y localizar los puntos más críticos a los que se encuentran expuestos los trabajadores dentro de su jornada laboral. La sistemática anterior, permitió obtener los siguientes resultados: que la empresa no ha establecido formalmente un Comité de Seguridad y Salud Ocupacional y que por lo tanto no cuenta con la estructuración formal de un Programa de Gestión de Seguridad y Salud Ocupacional que contenga planes políticas y procedimientos preventivos que ayuden al bienestar de los trabajadores. El área donde ocurren más accidentes es en Descargado y Colocado debido a que es donde se encuentran la mayoría de factores de riesgo. De acuerdo a la encuesta y la inspección realizada, la empresa carece de señalización en las diferentes áreas, y por último la empresa no posee registro detallado de accidentes laborales, entre otros. Para poder superar las deficiencias encontradas, se realizan las siguientes recomendaciones contenidas dentro de la propuesta de esta investigación: la creación y funcionamiento de un Comité de Seguridad y Salud Ocupacional, la creación de políticas por parte de las autoridades de la empresa, el equipamiento de seguridad así como la compra de los insumos básicos de primeros auxilios para la atención de accidentes, la implementación de capacitaciones tanto para el Comité de Seguridad y Salud Ocupacional así como también para el resto de los trabajadores, y simulacros los cuales se recomienda que realicen por lo menos dos veces al año. Todo lo anterior, permitirá obtener grandes beneficios a la empresa como la disminución de riesgos de accidentes y enfermedades profesionales, fomentar una cultura de prevención, cumplir con la legislación actual en la materia y evitarse infracciones ocasionadas por incumplimiento de la misma.

Multivalent reuse of web data about temporary art exhibitions: The Exhibitium Project

Our proposal aims to display the analysis techniques, methodologies as well as the most relevant results expected within the Exhibitium project framework (http://www.exhibitium.com). Awarded by the BBVA Foundation, the Exhibitium project is being developed by an international consortium of several research groups . Its main purpose is to build a comprehensive and structured data repository about temporary art exhibitions, captured from the web, to make them useful and reusable in various domains through open and interoperable data systems.

3D Block Modeling and Reserve Estimation of a Garnet Deposit

The purpose of this project is to develop a three-dimensional block model for a garnet deposit in the Alder Gulch, Madison County, Montana. Garnets occur in pre-Cambrian metamorphic Red Wash gneiss and similar rocks in the vicinity. This project seeks to model the percentage of garnet in a deposit called the Section 25 deposit using the Surpac software. Data available for this work are drillhole, trench and grab sample data obtained from previous exploration of the deposit. The creation of the block model involves validating the data, creating composites of assayed garnet percentages and conducting basic statistics on composites using Surpac statistical tools. Variogram analysis will be conducted on composites to quantify the continuity of the garnet mineralization. A three-dimensional block model will be created and filled with estimates of garnet percentage using different methods of reserve estimation and the results compared.

A MARKET-BASED APPROACH TO 3D PRINTING FOR ECONOMIC DEVELOPMENT IN GHANA

The purpose of this report is to create the foundation for further study of a market-based approach to 3D printing as an instrument for economic development in Ghana. The delivery of improved products and services to the most underserved markets is needed to spur economic activity and improve standards of living. The relationship between economic development and the advancement of technology is considered within the context of Ghana. An opportunity for market entry exists within both the bottom of the economic pyramid and the mid-segment market. 3D printing (additive manufacturing) has proven to be a disruptive technology that has demonstrated an ability to expedite the speed of innovations and create products that were previously not possible. An investigation of how 3D printers can be used to create improved products for the most underserved markets within Ghana is presented. Questions are asked to elucidate how and when adoption of 3D printers and 3D printed products may occur in the future. Based upon the existing barriers to adoption, 3D printing technology must improve before widespread adoption will occur in Ghana.

The conjugate gradient partitioned block frequency-domain for multichannel adaptive filtering

The conjugate gradient is the most popular optimization method for solving large systems of linear equations. In a system identification problem, for example, where very large impulse response is involved, it is necessary to apply a particular strategy which diminishes the delay, while improving the convergence time. In this paper we propose a new scheme which combines frequency-domain adaptive filtering with a conjugate gradient technique in order to solve a high order multichannel adaptive filter, while being delayless and guaranteeing a very short convergence time.

Reply to the Editor—Prevalence of interatrial block during lifetime

SIN FINANCIACIÓN

Interatrial block and atrial arrhythmias in centenarians: Prevalence, associations, and clinical implications

Data are lacking on the characteristics of atrial activity in centenarians, including interatrial block (IAB). The aim of this study was to describe the prevalence of IAB and auricular arrhythmias in subjects older than 100 years and to elucidate their clinical implications. We studied 80 centenarians (mean age 101.4 ± 1.5 years; 21 men) with follow-ups of 6–34 months. Of these 80 centenarians, 71 subjects (88.8%) underwent echocardiography. The control group comprised 269 septuagenarians. A total of 23 subjects (28.8%) had normal P wave, 16 (20%) had partial IAB, 21 (26%) had advanced IAB, and 20 (25.0%) had atrial fibrillation/flutter. The IAB groups exhibited premature atrial beats more frequently than did the normal P wave group (35.1% vs 17.4%; P < .001); also, other measurements in the IAB groups frequently fell between values observed in the normal P wave and the atrial fibrillation/flutter groups. These measurements included sex preponderance, mental status and dementia, perceived health status, significant mitral regurgitation, and mortality. The IAB group had a higher previous stroke rate (24.3%) than did other groups. Compared with septuagenarians, centenarians less frequently presented a normal P wave (28.8% vs 53.5%) and more frequently presented advanced IAB (26.3% vs 8.2%), atrial fibrillation/flutter (25.0% vs 10.0%), and premature atrial beats (28.3 vs 7.0%) (P < .01). Relatively few centenarians (<30%) had a normal P wave, and nearly half had IAB. Our data suggested that IAB, particularly advanced IAB, is a pre–atrial fibrillation condition associated with premature atrial beats. Atrial arrhythmias and IAB occurred more frequently in centenarians than in septuagenarians.

SOUTH CAROLINA COMMUNITY BLOCK GRANTS FOR EDUCATION PILOT PROGRAMS

The South Carolina General Assembly created the South Carolina Community Block Grant for Education Pilot Program by Proviso 1.94 in the 2014-15 General Appropriation Act. The intent of the proviso is to encourage public school districts and district entrepreneurial public educators to undertake state-of-the-art initiatives to improve student learning and to share the results with the state’s public education community. Although community partnerships were the focus of the grant, school districts were the lead agencies on the grant were directed by proviso to provide reports, summaries and items for the evaluation component of the grant. Through this proviso, one million dollars was allocated for the block grants with direct allocations to school districts. One hundred percent of the funds were allocated to school districts. No grant award was to exceed $250,000 annually unless the grants committee found that exceptional circumstances warranted exceeding this amount.