995 resultados para Latvian periodicals


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There is substantial international variation in human papillomavirus (HPV) prevalence; this study details the first report from Northern Ireland and additionally provides a systematic review and meta-analysis pooling the prevalence of high-risk (HR-HPV) subtypes among women with normal cytology in the UK and Ireland. Between February and December 2009, routine liquid based cytology (LBC) samples were collected for HPV detection (Roche Cobas® 4800 [PCR]) among unselected women attending for cervical cytology testing. Four electronic databases, including MEDLINE, were then searched from their inception till April 2011. A random effects meta-analysis was used to calculate a pooled HR-HPV prevalence and associated 95% confidence intervals (CI). 5,712 women, mean age 39 years (±SD 11.9 years; range 20-64 years), were included in the analysis, of which 5,068 (88.7%), 417 (7.3%) and 72 (1.3%) had normal, low, and high-grade cytological findings, respectively. Crude HR-HPV prevalence was 13.2% (95% CI, 12.7-13.7) among women with normal cytology and increased with cytological grade. In meta-analysis the pooled HR-HPV prevalence among those with normal cytology was 0.12 (95% CIs, 0.10-0.14; 21 studies) with the highest prevalence in younger women. HPV 16 and HPV 18 specific estimates were 0.03 (95% CI, 0.02-0.05) and 0.01 (95% CI, 0.01-0.02), respectively. The findings of this Northern Ireland study and meta-analysis verify the prevalent nature of HPV infection among younger women. Reporting of the type-specific prevalence of HPV infection is relevant for evaluating the impact of future HPV immunization initiatives, particularly against HR-HPV types other than HPV 16 and 18. J. Med. Virol. 85:295-308, 2013. © 2012 Wiley Periodicals, Inc. Copyright © 2012 Wiley Periodicals, Inc.

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An electronically reconfigurable Rotman lens is described which generates multiple beams that can be switched from monopulse sum to difference radiation patterns when used in conjunction with a six element Vivaldi antenna array. This is achieved by exploiting the voltage-dependent dielectric anisotropy property of nematic state liquid crystals to provide switched 0 degrees and 180 degrees phase shifts in the array feed lines. The viability of the concept is demonstrated by designing an antenna which exhibits dynamically reconfigurable monopulse radiation patterns over the frequency band 6-10 GHz. Measured and simulated results are shown to be in good agreement. (c) 2013 Wiley Periodicals, Inc.

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The influence of the layered silicate clay platelets on the nitrogen permeation properties of hydrogenated nitrile butadiene rubber (HNBR)/nanoclay nanocomposites has been investigated. Nanocomposites of HNBR modified with different percentages of the organoclay are processed through various routes. Commercially available organoclay (CLOISITE 15A) and various silane-coupling agents are used to improve the dispersion of the nanoclay in HNBR. A total of 10 different formulations of nanocomposites are manufactured. The addition of the organoclay has resulted in a significant enhancement of the nitrogen barrier properties of the manufactured nanocomposite. The mechanism of the reduction in the permeability is explained through the changes in the morphology and its bond to the filler. These changes are confirmed through examination of the morphology using x-ray diffraction, transmission electron microscope, and dynamic mechanical thermal analysis. There has been a drastic reduction up to 55.7% in nitrogen permeability. The reduction in gas permeation in HNBR is attributed to uniformly exfoliated clay platelets. Finally, three different permeability models, namely, the Nielsen model, modified Nielsen model, and Cussler model, have also been considered to predict the permeability behavior of nanocomposites with different volume filler fractions. The experimental values of gas permeability have been compared with theoretical models. It is observed that the modified Nielsen model closely matches with the measured permeation behavior. © 2011 Wiley Periodicals, Inc.

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The effects of addition of reinforcing carbon nanotubes (CNTs) into hydrogenated nitrile-butadiene rubber (HNBR) matrix on the mechanical, dynamic viscoelastic, and permeability properties were studied in this investigation. Different techniques of incorporating nanotubes in HNBR were investigated in this research. The techniques considered were more suitable for industrial preparation of rubber composites. The nanotubes were modified with different surfactants and dispersion agents to improve the compatibility and adhesion of nanotubes on the HNBR matrix. The effects of the surface modification of the nanotubes on various properties were examined in detail. The amount of CNTs was varied from 2.5 to 10 phr in different formulations prepared to identify the optimum CNT levels. A detailed analysis was made to investigate the morphological structure and mechanical behavior at room temperature. The viscoelastic behavior of the nanotube filler elastomer was studied by dynamic mechanical thermal analysis (DMTA). Morphological analysis indicated a very good dispersion of the CNTs for a low nanotube loading of 3.5 phr. A significant improvement in the mechanical properties was observed with the addition of nanotubes. DMTA studies revealed an increase in the storage modulus and a reduction in the glass-transition temperature after the incorporation of the nanotubes. Further, the HNBR/CNT nanocomposites were subjected to permeability studies. The studies showed a significant reduction in the permeability of nitrogen gas. Copyright © 2011 Wiley Periodicals, Inc.

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“There is no mode of action, no form of emotion, that we do not share with the lower animals” (137). This evolutionary claim is not attributable to Darwin, but to Oscar Wilde, who allows Gilbert to voice this bold assertion in “The True Function of Criticism.” While critics have long wrestled with the ethical stance and coherence of Wilde's writings, they have overlooked a significant influence on his work: debates concerning the evolution of morality that animated the periodicals in which he was writing. Wilde was fascinated by the proposition that complex human behaviours, including moral and aesthetic responses, might be traced back to evolutionary impulses. Significantly, he also wrote for a readership already engaged with these controversies.

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To explore the quality of reporting (writing and graphics) of articles that used time-to-event analyses to report dental treatment outcomes. A systematic search of the top 50 dental journals in 2008 produced the sample of articles for this analysis. Articles reporting treatment outcomes with (n = 95) and without (n = 91) time-to-event statistics were reviewed. Survival descriptive words used in the two groups were analysed (Pearson's chi-square). The quality of life tables, survival curves and time-to-event statistics were assessed (Kappa analysed agreement) and explored. Words describing dental outcomes 'over time' were more common in time-to-event compared with control articles (77%, 3%, P < 0.001). Non-specific use of 'rate' was common across both groups. Life tables and survival curves were used by 39% and 48% of the time-to-event articles, with at least one used by 82%. Construction quality was poor: 21% of life tables and 28% of survival curves achieved an acceptable standard. Time-to-event statistical reporting was poor: 3% achieved a high and 59% achieved an acceptable standard. The survival statistic, summary figure and standard error were reported in 76%, 95% and 20% of time-to-event articles. Individual statistical terms and graphic aids were common within and unique to time-to-event articles. Unfortunately, important details were regularly omitted from statistical descriptions and survival figures making the overall quality poor. It is likely this will mean such articles will be incorrectly indexed in databases, missed by searchers and unable to be understood completely if identified.

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The study was to determine if breast cancer patients aged 65 and above could be given adjuvant chemotherapy safely while achieving an acceptable relative dose intensity of at least 85%. We identified all patients aged 65 and over who received adjuvant chemotherapy over the 10 year period, November 1999 to October 2009, and determined the proportion that achieved a relative dose intensity of at least 85% as well as the tolerability of their treatment. A total of 101 patients were identified, with a median age of 69 years (range 65-78).Of these, 25.7% of patients had at least one major comorbidity, 84.2% had a tumor size of 5 cm or less, 73.3% were node positive and 58.4% were hormone receptor positive. The chemotherapy regimens used were AC (Doxorubicin and Cyclophosphamide), FEC (Fluorouracil, Epirubicin, and Cyclophosphamide), CMF (Cyclophosphamide, Methotrexate, and Fluorouracil) and ECMF (Epirubicin followed by CMF). Seventy-nine patients (78.2%) achieved the relative dose intensity of at least 85%. With respect to toxicity, 11.9% of patients developed febrile neutropenia and 23.8% of patients required hospital admission during the treatment period, but there were no treatment-related deaths in the group. A significant proportion of patients aged 65 and above achieved the intended dose intensity of at least 85% over this 10-year period, with manageable toxicity levels. This supports the use of these regimens as adjuvant chemotherapy for breast cancer in this age group. © 2011 Wiley Periodicals, Inc.

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Previous research demonstrates that high-involvement work practices (HIWPs) may be associated with burnout (emotional exhaustion and depersonalization); however, to date, the process through which HIWPs influence burnout is not clear. This article examined the impact of HIWPs on long-term burnout (emotional exhaustion and depersonalization) by considering the mediating role of person-organization fit (P-O fit) in this relationship. The study used a time-lagged design and was conducted in a Canadian general hospital among health care personnel. Findings from structural equation modeling (N = 185) revealed that perceived HIWPs were positively associated with P-O fit. There was no direct effect of HIWPs on burnout; rather, P-O fit fully mediated the relationship between employee perceptions of HIWPs and burnout. This study fills a void in the HR and burnout literature by demonstrating the role that P-O fit has in explaining how HIWPs alleviate emotional exhaustion and depersonalization. © 2016 Wiley Periodicals, Inc.

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Os objectivos do presente trabalho foram a investigação dos principais defeitos que ocorrem nos produtos de vidro de mesa produzidos por processos automáticos e o desenvolvimento de novos vidros e tecnologias que permitam aumentar os rendimentos de produção, ou a flexibilidade da operação de conformação. A viscosidade influencia a facilidade de conformação dos produtos. Temperaturas de gota mais baixas, espessuras de parede de produtos mais elevadas e baixas áreas de transferência térmica facilitam a ocorrência de defeitos, sobretudo mecânicos e de superfície. Foram identificados os produtos de vidro de mesa que apresentam maiores dificuldades na conformação, designados por produtos de forma complexa. Por ser um factor relevante na prática, discutiu-se o efeito da quantidade de casco usado na elaboração dos vidros sobre a conformação de produtos de forma complexa. A quantidade de casco influencia a volatilização de fundentes que por sua vez tem efeito sobre as propriedades de trabalhabilidade do vidro. Desenvolveram-se novos vidros compatíveis com a utilização de queimos enriquecidos em oxigénio que são utilizados para reduzirem os defeitos mecânicos e de superfície nos produtos de vidros de mesa prensados. A compatibilidade vidro/tecnologia fez-se com uma modificação do sistema de afinação do vidro. Os vidros modificados apresentam propriedades físicoquímicas semelhantes à do vidro inicial e por isso indicam viabilidade comercial. A tecnologia dos canais corantes foi utilizada para modificar a trabalhabilidade de um vidro base a partir da introdução até 5 % de fritas incolores ricas em Li2O. Os valores de RMS (velocidade relativa de máquina) desceram de 106,8 % para 95,7 % enquanto os valores de Pt (patamar de trabalho) subiram de 100,6 s para 111,3 s com o aumento de frita. As propriedades físico-químicas dos vidros aditivados com frita indicam viabilidade comercial. Esta inovação tecnológica introduz flexibilidade nos processos industriais vidreiros. A composição química do vidro e por isso as propriedades relacionadas com a trabalhabilidade podem ser entendidas como mais uma variável dos processos de conformação e usadas em função das técnicas de conformação disponíveis, da forma dos objectos a conformar e da engenharia da ferramenta moldante utilizada. Foi observada convergência entre os resultados experimentais e os valores calculados a partir dos modelos de Huff e Fluegel nos principais parâmetros da tecnologia vidreira (RMS e Pt) e nas propriedades dos vidros nomeadamente densidade e coeficiente de dilatação térmico. Uma parte importante deste trabalho decorreu em ambiente industrial. Em temas relacionados com a investigação do processamento vidreiro industrial, a prática de desenvolver trabalho experimental integrado no próprio ambiente industrial está claramente documentada na bibliografia publicada em revistas e jornais de referência internacional. ABSTRACT: The research on the causes of major defects that occur in glass tableware products produced by automatic processes and the development of new glasses and technologies for increasing the production efficiency, or the flexibility of operation were the objectives of the Thesis project. Viscosity influences the flexibility of glass forming. Lower drop temperatures, high product wall thicknesses, or low areas of heat transfer facilitate the occurrence of defects, mainly mechanical and surface born. We identified the products of glass tableware showing the greatest difficulties in forming, designated as complex shape products. The effect of the amount of recycled glass used in the preparation of glass batches on the conformation of products of complex shapes and on glass workability is discussed. The amount of recycled glass affects the volatilization of glass modifiers which in turn have an effect on the glass properties and workability. New glasses which become compatible with the use of oxygen burners were formulated, tested and developed to the industrial use, oxygen enrichment being used to reduce the mechanical and surface defects in pressed glass tableware. Compatibility glass / technology was achieved with a modified system of tuning of the glass. The modified glasses have physical and chemical properties similar to the original glass and therefore are commercially viable. The technology of the colouring channels was used to change glass workability of a glass base by the introduction of up to 5 % Li2O rich in colourless frit. The values of RMS (relative machine speed) fell from 106.8 % to 95.7 % while the values of Pt (cooling time) increased from 100.6 s to 111.3 s by the introduction of glass frits. The physico-chemical properties of the modified glass show commercial viability. This technology introduces flexibility in industrial processes of glass. The chemical composition of glass and therefore the properties related to workability can be understood as another variable of the glass forming processes and used according to the available forming techniques, the shape of objects and the engineering tools used for the moulds. Convergence was observed between experimental and predicted from Huff and Fluegel models in studying the properties of glasses. An important part of this work was done inside the industrial environment. On issues related to the investigation of the glass processing inside the industry, the practice of developing experimental work integrated in the industrial environment is clearly documented and referenced in the published literature in international journals and periodicals.

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This interdisciplinary study examines the contribution that a book-review magazine makes to the cultural identity of its readers. It is the result of reflections on the cultural work of Books in Canada , on whether or not this periodical was a cultural worksite and if that is the case how it performed that cultural work. In addition, it interrogates factors that may have contributed to the magazine's demise. The study affirms that Books in Canada, a cultural enterprise from 1971 to 2008, mirrored and helped to shape book and literary culture in Canada through its circulation, through the personalities of its editors, through its front covers and through its reviewers and their reviews. Furthermore, it proposes that the demise of the enterprise was due to a combination of factors. The study begins with an introduction to book reviewing and special-interest magazines. Chapter I examines the interplay between selected visual and textual contents published in Books in Canada in its founding years. These components reflected and helped to fuel the cultural nationalism that was sweeping Canada subsequent to the 1967 World's Fair in Montreal. There were also persistent rumours and comments about the magazine that caused certain"cracks in the foundation" to appear. Chapter II compares the aims and editorial challenges of Val Clery, founder of Books in Canada , with those of Adrien Thério, founder of Lettres québécoises, and of the editors of the magazines' twentieth-anniversary issues, Paul Stuewe in the case of the former and André Vanasse in the case of the latter. Evidence in the content of the magazine, editorial and otherwise, indicated that the"contracts" that the editors made with their readers over the years were similar, to reflect and shape a cultural identity, but the result of their"projects," that is, the nature of those identities, was distinctly different. Evidently then, personal aims, preferences and political leanings of editors can have a major impact on the content of a book-review magazine and thus on the cultural work that it does. Therefore, in Chapter III, I focus on selected contents published during the tenures of two of Books in Canada 's key editors, Paul Stuewe and Olga Stein, in order to understand ways that their choices constituted a form of cultural work. The second part of this chapter moves from an analysis of the cultural work of editors to an examination of the cultural work of reviewers. Here, through a close-reading of a selection of reviews published in Books in Canada, and in other periodicals, I argue that reviewers do cultural work in the way that they negotiate their presence in a review, and in how they signal that presence through lexical choices and through the degree of intellectual interaction that they invite. Intellectual interaction is at the core of Chapter IV.This chapter consists of close readings of some of the"billboards" of the enterprise, that is, the front covers of Books in Canada , in order to show how these important components do cultural work by requiring readers to make an intellectual leap from image to text. Chapter V suggests that book reviews, the company's"bills of goods," do cultural work in much the same way as the paratexts of a book. One of my own reviews is offered as a case-study along with a number of other reviews of how central components of a book-review magazine do cultural work through the illocutionary force of their sentences. The first part of Chapter VI, the final chapter, measures the legacy of the magazine, in particular, the annual Books in Canada First Novel Award. Created in 1976, this prize is awarded to the author of the novel judged by a Books in Canada prize committee to be the best first novel in English of the year. The second part of Chapter VI sheds light on factors that may have contributed to the closure of the enterprise, including the copyright uproar that accompanied the agreement that Adrian Stein, publisher of Books in Canada and Olga Stein's husband, made in 2001 with the online book merchant, Amazon.com. Furthermore, this penultimate section of the study suggests that one of the most important factors in the magazine's demise was the decision by the Steins to exploit their position as owners, publisher, and editor of a book-review periodical, a government-subsidized one at that, to publish their own lengthy pre-trial defense of Conrad Black. The chapter then zooms back from the particular to the general with a broader consideration of the impact of technology and globalization on the book industry and on the ability of Books in Canada to survive in any form, print or digital.

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The South Carolina Board of Landscape Architectural Examiners publishes a newsletter with program information and news.

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Santee Cooper publishes PowerSource, a corporate quarterly magazine that profiles the many ways Santee Cooper and employees work to full the mission of improving the quality of life for South Carolinians.

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The South Carolina Board of Landscape Architectural Examiners publishes a newsletter with program information and news.

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Santee Cooper publishes PowerSource, a corporate quarterly magazine that profiles the many ways Santee Cooper and employees work to full the mission of improving the quality of life for South Carolinians.