6,025 research outputs found

    An Appraisal of FOPIM Fast-converging Perturbation Method

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    Appraisal of first order perturbation iteration fast converging metho

    Diamond chemical vapor deposition on optical fibers for fluorescence waveguiding

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    A technique has been developed for depositing diamond crystals on the endfaces of optical fibers and capturing the fluorescence generated by optically active defects in the diamond into the fiber. This letter details the diamond growth on optical fibers and transmission of fluorescence through the fiber from the nitrogen-vacancy (N-V) color center in diamond. Control of the concentration of defects incorporated during the chemical vapor deposition (CVD) growth process is also demonstrated. These are the first critical steps in developing a fiber coupled single photon source based on optically active defect centers in diamond.Comment: 10 pages, 3 figure

    The health and wellbeing of adults working in early childhood education

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    This article reports the results of a survey of 168 New Zealand early childhood workers and describes their health status, behaviours and concerns. The respondents included 73 childcare teachers, 58 kindergarten teachers and 37 home-based educators. Although 92 per cent of respondents reported that they had good or excellent health, statistically significant differences were found between the groups for days absent because of illness, accidental injuries, job-related stress and ergonomic aspects of their work. All groups reported an increase in various physical symptoms since working with children, in particular backaches, muscle strain and fatigue. One-quarter of respondents experienced an illness related to their work with children during the past year, most commonly respiratory and gastrointestinal illnesses. The study alerts early childhood education employers to the importance of managing health issues such as workload and stress, occupational injuries, the provision of an ergonomically healthy work environment and adequate conditions of employment

    Multiplexed communication over a high-speed quantum channel

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    In quantum information systems it is of particular interest to consider the best way in which to use the non-classical resources consumed by that system. Quantum communication protocols are integral to quantum information systems and are amongst the most promising near-term applications of quantum information science. Here we show that a multiplexed, digital quantum communications system supported by comb of vacuum squeezing has a greater channel capacity per photon than a source of broadband squeezing with the same analogue bandwidth. We report on the time-resolved, simultaneous observation of the first dozen teeth in a 2.4 GHz comb of vacuum squeezing produced by a sub-threshold OPO, as required for such a quantum communications channel. We also demonstrate multiplexed communication on that channel

    I\u27m Tying The Leaves So They Won\u27t Come Down

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    https://digitalcommons.library.umaine.edu/mmb-vp/1571/thumbnail.jp

    Dear Pal Of My Dreams

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    https://digitalcommons.library.umaine.edu/mmb-vp/1288/thumbnail.jp

    Genome sequence of an alphaherpesvirus from a beluga whale (Delphinapterus leucas)

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    Beluga whale alphaherpesvirus 1 was isolated from a blowhole swab taken from a juvenile beluga whale. The genome is 144,144 bp in size and contains 86 putative genes. The virus groups phylogenetically with members of the genus Varicellovirus in subfamily Alphaherpesvirinae and is the first alphaherpesvirus sequenced from a marine mammal
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