2,326 research outputs found

    Die Spuren der Gastarbeit: das schwierige WechselverhĂ€ltnis von sozioökonomischer Exklusion und soziokultureller Integration am Beispiel von TĂŒrkInnen in Ternitz

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    'Zwei Themenkomplexe werden im migrationssoziologischen Zusammenhang immer wieder problematisiert: PhĂ€nomene der sozioökonomischen Exklusion (Ausschluss im Sinn von Ausgrenzung und RandstĂ€ndigkeit) und der soziokulturellen Integration von ZuwanderInnen. Diese stehen begrifflich in einem engen WechselverhĂ€ltnis, die genaue Form ihres Zusammenhangs wird aber ebenso selten thematisiert wie ihre gemeinsame Wurzel: die Gastarbeit der 1960er- und 1970er-Jahre. Am Beispiel von TĂŒrkInnen in Ternitz - einer altindustriellen Kleinstadt im sĂŒdlichen Niederösterreich - sollen die Prozesse der Exklusion und Integration als Folgewirkungen der Arbeitsmigration beleuchtet werden. Beschrieben werden die intergenerationelle Entwicklung der Lebenslage, die BildungsmobilitĂ€t und die mit ihr verbundenen Interpretationsschwierigkeiten sowie die widersprĂŒchliche Entwicklung des identifikativen Bezugs zur österreichischen Gesellschaft - so ist etwa die erste Generation dieser MigrantInnen deutlich stĂ€rker an österreichischer Politik interessiert als die Folgegenerationen. Abschließend wird gezeigt, wie sich Generationen-, Lebenslagen- und Periodeneffekte auswirken.' (Autorenreferat)'Two complex social issues regularly are associated in migration studies: phenomena of socio-economic exclusion and socio-cultural integration. Although a conceptual interrelation exists, the precise type of this interdependence is as rarely discussed as their shared root, which is the labour migration (Gastarbeit) of the 1960s and 1970s. Referring to the case of the Turkish population of Ternitz - a small industrial town in the south of Lower Austria -, the article describes the social processes of exclusion and integration as consequences of labour migration. The intergenerational development of living conditions, educational mobility (and related problems of interpretation) and the contradictory development of identifications in the context of Austrian society are discussed - for example, the first generation of migrants is more interested in Austrian politics than the following generations. Finally, the article demonstrates how effects of generations, living conditions and periods of migration impact identification.' (author's abstract)

    Social Research in Times of Big Data: The Challenges of New Data Worlds and the Need for a Sociology of Social Research

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    The phenomenon of big data does not only deeply affect current societies but also poses crucial challenges to social research. This article argues for moving towards a sociology of social research in order to characterize the new qualities of big data and its deficiencies. We draw on the neopragmatist approach of economics of convention (EC) as a conceptual basis for such a sociological perspective. This framework suggests investigating processes of quantification in their interplay with orders of justifications and logics of evaluation. Methodological issues such as the question of the "quality of big data" must accordingly be discussed in their deep entanglement with epistemic values, institutional forms, and historical contexts and as necessarily implying political issues such as who controls and has access to data infrastructures. On this conceptual basis, the article uses the example of health to discuss the challenges of big data analysis for social research. Phenomena such as the rise of new and massive privately owned data infrastructures, the economic valuation of huge amounts of connected data, or the movement of "quantified self" are presented as indications of a profound transformation compared to established forms of doing social research. Methodological and epistemological, but also institutional and political, strategies are presented to face the risk of being "outperformed" and "replaced" by big data analysis as they are already done in big US American and Chinese Internet enterprises. In conclusion, we argue that the sketched developments have important implications both for research practices and methods teaching in the era of big data

    Fixed Narratives and Entangled Categorizations: Educational Problematizations in Times of Politicized and Stratified Migration

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    Western European migration and citizenship regimes have undergone profound transformations over the past decades. The massive politicization and stratification of migration are key features of these dynamics. Focusing on the case of Germany, this article investigates how these developments affect logics of educational practice. It is argued that teachers, faced with increasingly complex and uncertain situations, systematically draw on categories that combine political and educational logics. These “entangled categories” do hardly allow to unravel the complex configurations currently at stake at the intersection of migration and education. A secondary analysis of TIMSS-2015 data is performed to substantiate the article’s core hypothesis: these forms of categorization have crystallized into patterns of educational problematization that couple perceptions of educational challenges, professional self-images, and didactic approaches. These fixed narratives disproportionally affect migrant children from underprivileged social backgrounds. They hence have important implications both for our understanding of educational inequalities in times of politicized and stratified migration and for furthering professional reflexivity

    Process intensification: Case study with a CHO-based monoclonal antibody production process

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    Standard platform technologies for cell culture processing provide simple and robust strategies to meet rapid timelines for early process development and ease of manufacturing. However, when there is a need to achieve high antibody titers due to high product demand, both culture media and feed strategies must be customized for specific cell lines. Two case studies will describe the strategies employed as part of a process intensification effort to overcome the limitations of a platform Phase III cell culture process. The first case study will demonstrate an intensified fed-batch process development effort performed to maximize production of a CHO-based monoclonal antibody, while maintaining product quality comparability with the original Phase III process. The second case study will describe the evaluation of a concentrated fed-batch process using alternating tangential flow filtration to retain the protein in the bioreactor, and achieve even higher titers in support of the high product demand forecast. These case studies will show that the intensified fed-batch process improved titers by 50%, and the concentrated fed-batch process improved titers by 100% relative to the fed-batch platform

    A Vision of Quantitative Imaging Technology for Validation of Advanced Flight Technologies

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    Flight-testing is traditionally an expensive but critical element in the development and ultimate validation and certification of technologies destined for future operational capabilities. Measurements obtained in relevant flight environments also provide unique opportunities to observe flow phenomenon that are often beyond the capabilities of ground testing facilities and computational tools to simulate or duplicate. However, the challenges of minimizing vehicle weight and internal complexity as well as instrumentation bandwidth limitations often restrict the ability to make high-density, in-situ measurements with discrete sensors. Remote imaging offers a potential opportunity to noninvasively obtain such flight data in a complementary fashion. The NASA Hypersonic Thermodynamic Infrared Measurements Project has demonstrated such a capability to obtain calibrated thermal imagery on a hypersonic vehicle in flight. Through the application of existing and accessible technologies, the acreage surface temperature of the Shuttle lower surface was measured during reentry. Future hypersonic cruise vehicles, launcher configurations and reentry vehicles will, however, challenge current remote imaging capability. As NASA embarks on the design and deployment of a new Space Launch System architecture for access beyond earth orbit (and the commercial sector focused on low earth orbit), an opportunity exists to implement an imagery system and its supporting infrastructure that provides sufficient flexibility to incorporate changing technology to address the future needs of the flight test community. A long term vision is offered that supports the application of advanced multi-waveband sensing technology to aid in the development of future aerospace systems and critical technologies to enable highly responsive vehicle operations across the aerospace continuum, spanning launch, reusable space access and global reach. Motivations for development of an Agency level imagery-based measurement capability to support cross cutting applications that span the Agency mission directorates as well as meeting potential needs of the commercial sector and national interests of the Intelligence, Surveillance and Reconnaissance community are explored. A recommendation is made for an assessment study to baseline current imaging technology including the identification of future mission requirements. Development of requirements fostered by the applications suggested in this paper would be used to identify technology gaps and direct roadmapping for implementation of an affordable and sustainable next generation sensor/platform system

    Empowering With PrEP (E-PrEP), a Peer-Led Social Media–Based Intervention to Facilitate HIV Preexposure Prophylaxis Adoption Among Young Black and Latinx Gay and Bisexual Men: Protocol for a Cluster Randomized Controlled Trial

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    Background: Young black and Latinx, gay, bisexual, and other men who have sex with men (YBLGBM, aged 18-29 years) have among the highest rates of new HIV infections in the United States and are not consistently reached by existing prevention interventions. Preexposure prophylaxis (PrEP), an oral antiretroviral regimen taken daily by HIV-uninfected individuals to prevent HIV acquisition, is highly efficacious in reducing HIV acquisition and could help stop the HIV epidemic in YBLGBM. Use of social media (eg, Facebook, Twitter, online dating sites) is ubiquitous among young people, providing an efficient avenue to engage YBLGBM to facilitate PrEP adoption. Objective: Our overall goal was to develop and pilot test a theoretically grounded, social media–based, peer-led intervention to increase PrEP uptake in YBLGBM. We used diffusion of innovation and information-motivation-behavioral skills frameworks to (1) identify potential factors associated with interest in and adoption of PrEP among YBLGBM; (2) develop Empowering with PrEP (E-PrEP), a social media–based, peer-led intervention to increase PrEP uptake in YBLGBM; and (3) pilot test the feasibility and acceptability of E-PrEP, and determine its preliminary efficacy for increasing adoption of PrEP by YBLGBM. We describe the development and protocol for E-PrEP. Methods: Using a participatory research approach, we partnered with YBLGBM intervention development partners to develop a social media–based behavioral intervention to facilitate PrEP uptake, which involved an online messaging campaign disseminated by YBLGBM peer leaders to their existing online networks. We designed the 6-week campaign to provide education about PrEP, increase motivation to use PrEP, and facilitate access to PrEP. We then conducted a cluster-randomized trial of E-PrEP compared with an attention-matched general health control condition (E-Health) among YBLGBM aged 18 to 29 years to assess E-PrEP’s feasibility, acceptability, preliminary efficacy for increasing self-reported intention to use PrEP, PrEP uptake, and impact on knowledge and attitudes about PrEP at 12-week follow-up (6 weeks after the end of the online campaign). Results: From October 2016 to March 2017, we developed, pretested, and refined E-PrEP with 6 YBLGBM intervention development partners. From May to June 2017, we recruited, enrolled, and randomly assigned 10 peer leaders (n=5 for each condition). The 10 peer leaders then recruited and enrolled 152 participants from their existing online networks (range 3-33 per peer leader), during June and July 2017. Intervention follow-up was completed after 12 weeks, in November 2017, with analyses underway. Conclusions: We hypothesize that, compared with E-Health, participants randomly assigned to E-PrEP will be more likely to express intention to use PrEP and greater PrEP uptake, and will also show changes in potential mediators of PrEP uptake (knowledge, attitudes, stigma, and access). A Web-based biobehavioral intervention model such as E-PrEP could be rapidly scaled even with limited resources and have significant population-level impact

    DNA methylation-based estimator of telomere length

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    Telomere length (TL) is associated with several aging-related diseases. Here, we present a DNA methylation estimator of TL (DNAmTL) based on 140 CpGs. Leukocyte DNAmTL is applicable across the entire age spectrum and is more strongly associated with age than measured leukocyte TL (LTL) (r ~-0.75 for DNAmTL versus r ~ -0.35 for LTL). Leukocyte DNAmTL outperforms LTL in predicting: i) time-to-death (p=2.5E-20), ii) time-to-coronary heart disease (p=6.6E-5), iii) time-to-congestive heart failure (p=3.5E-6), and iv) association with smoking history (p=1.21E-17). These associations are further validated in large scale methylation data (n=10k samples) from the Framingham Heart Study, Women's Health Initiative, Jackson Heart Study, InChianti, Lothian Birth Cohorts, Twins UK, and Bogalusa Heart Study. Leukocyte DNAmTL is also associated with measures of physical fitness/functioning (p=0.029), age-at-menopause (p=0.039), dietary variables (omega 3, fish, vegetable intake), educational attainment (p=3.3E-8) and income (p=3.1E-5). Experiments in cultured somatic cells show that DNAmTL dynamics reflect in part cell replication rather than TL per se. DNAmTL is not only an epigenetic biomarker of replicative history of cells, but a useful marker of age-related pathologies that are associated with it

    Colour reconnection in e+e- -> W+W- at sqrt(s) = 189 - 209 GeV

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    The effects of the final state interaction phenomenon known as colour reconnection are investigated at centre-of-mass energies in the range sqrt(s) ~ 189-209 GeV using the OPAL detector at LEP. Colour reconnection is expected to affect observables based on charged particles in hadronic decays of W+W-. Measurements of inclusive charged particle multiplicities, and of their angular distribution with respect to the four jet axes of the events, are used to test models of colour reconnection. The data are found to exclude extreme scenarios of the Sjostrand-Khoze Type I (SK-I) model and are compatible with other models, both with and without colour reconnection effects. In the context of the SK-I model, the best agreement with data is obtained for a reconnection probability of 37%. Assuming no colour reconnection, the charged particle multiplicity in hadronically decaying W bosons is measured to be (nqqch) = 19.38+-0.05(stat.)+-0.08 (syst.).Comment: 30 pages, 9 figures, Submitted to Euro. Phys. J.

    Search for R-Parity Violating Decays of Scalar Fermions at LEP

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    A search for pair-produced scalar fermions under the assumption that R-parity is not conserved has been performed using data collected with the OPAL detector at LEP. The data samples analysed correspond to an integrated luminosity of about 610 pb-1 collected at centre-of-mass energies of sqrt(s) 189-209 GeV. An important consequence of R-parity violation is that the lightest supersymmetric particle is expected to be unstable. Searches of R-parity violating decays of charged sleptons, sneutrinos and squarks have been performed under the assumptions that the lightest supersymmetric particle decays promptly and that only one of the R-parity violating couplings is dominant for each of the decay modes considered. Such processes would yield final states consisting of leptons, jets, or both with or without missing energy. No significant single-like excess of events has been observed with respect to the Standard Model expectations. Limits on the production cross- section of scalar fermions in R-parity violating scenarios are obtained. Constraints on the supersymmetric particle masses are also presented in an R-parity violating framework analogous to the Constrained Minimal Supersymmetric Standard Model.Comment: 51 pages, 24 figures, Submitted to Eur. Phys. J.
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