4,642 research outputs found

    Automatic lineament analysis techniques for remotely sensed imagery

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    Imperial Users onl

    Telephone or video? A review of telemedicine consultations during the COVID-19 pandemic in a spinal MSK service

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    A service evaluation of the move to virtual appointments during the COVID-19 pandemic

    Testing the Viability of a 3D Workflow Using Only Adobe Creative Cloud

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    To determine whether or not a design team or individual designer can create 3D prototypes and the subsequent finished product in a more economically sound and timely manner by purchasing and utilizing Adobe Creative Cloud applications as opposed to the standard workflow that has been established in the past 20-25 years. A 15-question qualitative survey was submitted to twenty (20) 3D product designers/engineers that currently work in the established industry. Questions were asked to determine what the standard industry professionals are using in their 3D design workflows and if they are open to newer methods that are becoming available through Adobe’s Creative Cloud. Additionally, I conducted a personal study of the 3D Tools that Adobe has launched in their newest version of Creative Cloud in order to give my input on whether or not a beginner can learn how to design 3D prototypes and enter into the industry with these skills

    A Pointing Solution for the Medium Size Telescopes for the Cherenkov Telescope Array

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    An important aspect of the calibration of the Cherenkov Telescope Array is the pointing, which enables an exact alignment of each telescope and therefore allows to transform a position in the sky to a point in the plane of the Cherenkov camera and vice versa. The favoured approach for the pointing calibration of the medium size telescopes (MST) is the installation of an optical CCD-camera in the dish of the telescope that captures the position of the Cherenkov camera and of the stars in the night sky simultaneously during data taking. The adaption of this approach is presented in this proceeding.Comment: 6 pages, 9 figures, Proceedings of the 6th International Symposium on High-Energy Gamma-Ray Astronomy (Gamma2016

    Heavy Supersymmetric Particle Effects in Higgs Boson Production Associated with a Bottom Quark Pair at LHC and Tevatron

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    If all the supersymmetry particles (sparticles) except a light Higgs boson are too heavy to be directly produced at the Large Hadron Collider (LHC) and Tevatron, a possible way to reveal evidence for supersymmetry is through their virtual effects in other processes. We examine such supersymmetric QCD effects in bottom pair production associated with a light Higgs boson at the LHC and Tevatron. We find that if the relevant sparticles (gluinos and squarks) are well above the TeV scale, too heavy to be directly produced, they can still have sizable virtual effects in this process. For large tanβ\tan\beta, such residual effects can alter the production rate by as much as 40 percent, which should be observable in future measurements of this process.Comment: results for Tevatron added, version in PR

    Transformation and fate of microphytobenthos carbon in subtropical, intertidal sediments: potential for long-term carbon retention revealed by <sup>13</sup>C-labeling

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    Microphytobenthos (MPB) are ubiquitous in coastal sediments, but the fate of their production (carbon biomass) is poorly defined. The processing and fate of MPB-derived carbon in subtropical intertidal sediments was investigated through in situ labeling with <sup>13</sup>C-bicarbonate. Of the added <sup>13</sup>C, 100% was fixed within ~ 4 h, suggesting that MPB productivity was limited by inorganic carbon availability. Although there was rapid transfer of <sup>13</sup>C to bacteria (within 12 h), a relatively small fraction of <sup>13</sup>C was transferred to heterotrophs (up to 12.5% of total fixed <sup>13</sup>C into bacteria and 0.01% into foraminifera). MPB was the major reservoir for <sup>13</sup>C throughout the study, suggesting that production of extracellular polymeric substances was limited and/or MPB recycled <sup>13</sup>C. This retention of <sup>13</sup>C was reflected in remarkably slow estimated turnover times for the MPB community (66–100 d). Over 31 d, ~ 70% of the <sup>13</sup>C was lost from sediments. This was primarily via resuspension (~ 55%), enhanced by elevated freshwater flow following rainfall. A further ~ 13% was lost via fluxes of dissolved inorganic carbon during inundation. However, <sup>13</sup>C losses via dissolved organic carbon fluxes from inundated sediments (0.5%) and carbon dioxide fluxes from exposed sediments (<0.1%) were minimal. The retention of ~ 30% of the carbon fixed by MPB within one tidal exposure after > 30 d, despite high resuspension, demonstrates the potentially substantial longer term retention of MPB-derived carbon in unvegetated sediments and suggests that MPB may contribute to carbon burial ("blue carbon")

    Recommending swimming to people with low back pain: a scoping review

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    Background It is common practice for health professionals to recommend swimming to people with low back pain (LBP) despite limited evidence. The aim of this review was to gain an understanding of the current evidence base supporting the recommendation of swimming to people with LBP. Methods A scoping review was conducted searching five electronic databases, CINAHL, MEDLINE, PEDro, PubMed, and SPORTdiscus using the keywords back pain AND swim*. The studies were grouped by study design and the following uncertainties were considered; the impact of swimming on the spine and LBP, evidence of swimming increasing or reducing the risk of LBP and the use of swimming in LBP rehabilitation programmes. Results 25 studies met the eligibility criteria; including sixteen observational studies exploring the relationship between swimming and LBP, three biomechanical studies investigating the impact of swimming on the spine, and five interventional studies of which four which integrated swimming into a rehabilitation programme and one used swimming to modify lumbar lordosis. Conclusion The review confirmed there is limited research and only low-level evidence to support the recommendation of swimming to people with LBP. Observational studies make up the greater proportion of research undertaken in the field; the data indicates that swimming is a low-risk form of exercise but not without risk. The findings from biomechanical research suggest that lumbar lordosis does not increase excessively when swimming breaststroke, but certain swimming techniques could negatively impact LBP and interventional trials illustrate that there are various ways to integrate swimming into a rehabilitation programme

    The mammary cellular hierarchy and breast cancer.

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    Advances in the study of hematopoietic cell maturation have paved the way to a deeper understanding the stem and progenitor cellular hierarchy in the mammary gland. The mammary epithelium, unlike the hematopoietic cellular hierarchy, sits in a complex niche where communication between epithelial cells and signals from the systemic hormonal milieu, as well as from extra-cellular matrix, influence cell fate decisions and contribute to tissue homeostasis. We review the discovery, definition and regulation of the mammary cellular hierarchy and we describe the development of the concepts that have guided our investigations. We outline recent advances in in vivo lineage tracing that is now challenging many of our assumptions regarding the behavior of mammary stem cells, and we show how understanding these cellular lineages has altered our view of breast cancer
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