692,967 research outputs found

    KiDS-i-800: Comparing weak gravitational lensing measurements in same-sky surveys

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    We present a weak gravitational lensing analysis of 815 square degree of ii-band imaging from the Kilo-Degree Survey (KiDS-ii-800). In contrast to the deep rr-band observations, which take priority during excellent seeing conditions and form the primary KiDS dataset (KiDS-rr-450), the complementary yet shallower KiDS-ii-800 spans a wide range of observing conditions. The overlapping KiDS-ii-800 and KiDS-rr-450 imaging therefore provides a unique opportunity to assess the robustness of weak lensing measurements. In our analysis, we introduce two new `null' tests. The `nulled' two-point shear correlation function uses a matched catalogue to show that the calibrated KiDS-ii-800 and KiDS-rr-450 shear measurements agree at the level of 1±41 \pm 4\%. We use five galaxy lens samples to determine a `nulled' galaxy-galaxy lensing signal from the full KiDS-ii-800 and KiDS-rr-450 surveys and find that the measurements agree to 7±57 \pm 5\% when the KiDS-ii-800 source redshift distribution is calibrated using either spectroscopic redshifts, or the 30-band photometric redshifts from the COSMOS survey.Comment: 24 pages, 20 figures. Submitted to MNRAS. Comments welcom


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    This extended essay discusses the representation of the behavior of American kids as seen through their life styles reflected on Kenny Chesney “American Kids”. The behavior is well portrait through the lyric, but the lyric itself has not been reviewed sufficiently. The purposes of this extended essay are to describe the behavior literally and figuratively, and also to construct the meaning related to the description of the lyric. The writer analyzes the study using library research and she adopts the psychology of behavior by B.F Skinner as her approach method. The result of the analysis shows the description of American kids behavior literally and figuratively as pride in American kids reflected on “American Kids”. Therefore, it can be concluded that the song lyric of American Kids reflects the representation of American kids behavior

    Bulgaria: are children empowered to benefit from the internet?

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    New findings from Global Kids Online Bulgaria, launched today by the Bulgarian Safer Internet Centre, reveal that children are spending more time online at increasingly younger ages. Even though many of them are technically competent and skilled internet users, few children take full advantage of the online opportunities or act in a proactive way

    Global Kids Online at World Summit on the Information Society

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    Sonia Livingstone and Jasmina Byrne presented Global Kids Online at the World Summit on the Information Society in Geneva. They pointed out that, although children are often celebrated as the internet pioneers or ‘digital natives’, in most countries it is not even known how many children have internet access, let alone whether its use is beneficial or harmful for them

    Children’s access to the internet: presenting recent findings

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    Sonia Livingstone and Daniel Kardefelt-Winther gave a keynote speech at the ECREA pre-conference on Research of Children, Youth and Media presenting the Global Kids Online recently launched findings. They discussed the key issues related to children’s online risks and opportunities and the methodological challenges related to researching children’s internet use

    New research toolkit on children’s internet use

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    Global Kids Online launched its new research toolkit at the end of 2016 at the Children’s Lives in the Digital Age seminar held at UNICEF Headquarters in New York. We spent the last two years working with research partners, experts, and international advisors to develop a range of quantitative and qualitative research instruments that are now freely available at www.globalkidsonline.net/tools

    The latest findings from Kids Online Brazil on children and the internet

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    The latest findings from Kids Online Brazil were launched earlier this month by the Regional Centre for Studies on the Development of the Information Society (Cetic.br) during the UNESCO Media Information Literacy Week in SĂŁo Paulo. Conducted annually since 2012, the Kids Online survey highlighted important digital inequalities amongst children in Brazil

    Highlights from 18 months of Global Kids Online

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    The Global Kids Online team and partners from Argentina, Serbia, South Africa and the Philippines spent the last 18 months developing and testing a multi-method research toolkit. Researchers in Brazil, Bulgaria, Chile, Ghana, and Montenegro also joined in to conduct primary research asking children about their experiences on the internet and the contexts and consequence of internet use

    A meeting of Global Kids Online ahead of launch of global toolkit

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    LSE Department of Media and Communications and UNICEF Office of Research – Innocenti convened the second Global Kids Online network meeting at LSE on 21 and 22 March 2016. The meeting brought together close to 40 academics, researchers, and UNICEF staff from 14 different countries, including Argentina, Bulgaria, Ghana, India, Montenegro, the Philippines, Serbia, and South Africa, as well as representatives of the UK Home Office and WeProtect