1,909 research outputs found

    How new technology is addressed by researchers in educational studies: approaches from high-performing universities in China and the UK

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    There is a crisis of expectation in relation to educational technology. This is sometimes interpreted as a failure of academic researchers to disseminate their work to educational practitioners. However, another interpretation dwells on the lack of vision characterising such research. Because teachers often encounter research most intensely during their own pre-service and in-service education, we review academic research here through a snapshot of output from 10 leading university Education departments sampled in the UK and China. Empirical papers with a central interest in new technology were scarce, representing around 10% of the sample. Research was strongly situated in 'classroom' contexts although, as critics have suggested, with limited attention to the wider ecology of those places and with teachers being the focal interest as much as students. An 'outcomes' research orientation was less common than an interest in process. Although this was approached with different methodologies in China and the UK. Discussion addresses the challenge of effective and authoritative dissemination and constraints arising from the political economy of research itself

    Conditional knockout of the Menkes disease copper transporter demonstrates its critical role in embryogenesis

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    © The Author(s), 2012. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in PLoS ONE 7 (2012): e43039, doi:10.1371/journal.pone.0043039.The transition metal, copper (Cu), is an enzymatic cofactor required for a wide range of biochemical processes. Its essentiality is demonstrated by Menkes disease, an X-linked copper deficiency disorder characterized by defects in nervous-, cardiovascular- and skeletal systems, and is caused by mutations in the ATP7A copper transporter. Certain ATP7A mutations also cause X-linked Spinal Muscular Atrophy type 3 (SMAX3), which is characterized by neuromuscular defects absent an underlying systemic copper deficiency. While an understanding of these ATP7A-related disorders would clearly benefit from an animal model that permits tissue-specific deletion of the ATP7A gene, no such model currently exists. In this study, we generated a floxed mouse model allowing the conditional deletion of the Atp7a gene using Cre recombinase. Global deletion of Atp7a resulted in morphological and vascular defects in hemizygous male embryos and death in utero. Heterozygous deletion in females resulted in a 50% reduction in live births and a high postnatal lethality. These studies demonstrate the essential role of the Atp7a gene in mouse embryonic development and establish a powerful model for understanding the tissue-specific roles of ATP7A in copper metabolism and disease.This work was supported by National Institutes of Health Grants DK59893 and DK093386 to M.J.P., and DK44464 to J.D.G

    CAPABLE trial: A randomized controlled trial of nurse, occupational therapist and handyman to reduce disability among older adults: Rationale and design

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    AbstractBackgroundAs the population ages, it is increasingly important to test new models of care that improve life quality and decrease health costs. This paper presents the rationale and design for a randomized clinical trial of a novel interdisciplinary program to reduce disability among low income older adults based on a previous pilot trial of the same design showing strong effect.MethodsThe CAPABLE (Community Aging in Place, Advancing Better Living for Elders) trial is a randomized controlled trial in which low income older adults with self-care disability are assigned to one of two groups: an interdisciplinary team of a nurse, occupational therapist, and handyman to address both personal and environmental risk factors for disability based on participants' functional goals, or an attention control of sedentary activities of choice. Both groups receive up to 10 home visits over 4months.OutcomesThe primary outcome is decreased disability in self-care (ADL). Secondary outcomes are sustained decrease in self care disability as well as improvement in instrumental ADLS, strength, balance, walking speed, and health care utilization. Careful cost tracking and analysis using intervention data and claims data will enable direct measurement of the cost impact of the CAPABLE approach. CAPABLE has the potential to leverage current health care spending in Medicaid waivers, Accountable Care Organizations and other capitated systems to save the health care system costs as well as improving low income older adults' ability to age at home with improved life quality

    Structural variation of centromeric endogenous retroviruses in human populations and their impact on cutaneous T-cell lymphoma, Sézary syndrome, and HIV infection

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    © 2019 The Author(s). Background: Human Endogenous Retroviruses type K HML-2 (HK2) are integrated into 117 or more areas of human chromosomal arms while two newly discovered HK2 proviruses, K111 and K222, spread extensively in pericentromeric regions, are the first retroviruses discovered in these areas of our genome. Methods: We use PCR and sequencing analysis to characterize pericentromeric K111 proviruses in DNA from individuals of diverse ethnicities and patients with different diseases. Results: We found that the 5′ LTR-gag region of K111 proviruses is missing in certain individuals, creating pericentromeric instability. K111 deletion (-/- K111) is seen in about 15% of Caucasian, Asian, and Middle Eastern populations; it is missing in 2.36% of African individuals, suggesting that the -/- K111 genotype originated out of Africa. As we identified the -/-K111 genotype in Cutaneous T-cell lymphoma (CTCL) cell lines, we studied whether the -/-K111 genotype is associated with CTCL. We found a significant increase in the frequency of detection of the -/-K111 genotype in Caucasian patients with severe CTCL and/or Sézary syndrome (n = 35, 37.14%), compared to healthy controls (n = 160, 15.6%) [p = 0.011]. The -/-K111 genotype was also found to vary in HIV-1 infection. Although Caucasian healthy individuals have a similar frequency of detection of the -/- K111 genotype, Caucasian HIV Long-Term Non-Progressors (LTNPs) and/or elite controllers, have significantly higher detection of the -/-K111 genotype (30.55%; n = 36) than patients who rapidly progress to AIDS (8.5%; n = 47) [p = 0.0097]. Conclusion: Our data indicate that pericentromeric instability is associated with more severe CTCL and/or Sézary syndrome in Caucasians, and appears to allow T-cells to survive lysis by HIV infection. These findings also provide new understanding of human evolution, as the -/-K111 genotype appears to have arisen out of Africa and is distributed unevenly throughout the world, possibly affecting the severity of HIV in different geographic areas

    Development of the Risk Appraisal Measure: A Brief Screen to Identify Risk Areas and Guide Interventions for Dementia Caregivers

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    To develop and validate a brief screening measure for use in research, healthcare, and community settings to systematically assess well-being and identify needed areas of support for caregivers of patients with dementia. DESIGN : This study used data from Resources for Enhancing Alzheimer's Caregiver Health (REACH II), a multisite randomized clinical trial of a behavioral intervention designed to improve the quality of life of caregivers in multiple domains. SETTING : REACH II. PARTICIPANTS : Two hundred twelve Hispanic, 211 black, and 219 white family caregivers providing in-home care to patients with dementia. MEASUREMENT : Based on conceptual and psychometric analyses, a 16-item measure was developed that assesses six domains linked to caregiver risk and amenable to intervention: depression, burden, self-care and health behaviors, social support, safety, and patient problem behaviors. The reliability and validity of the instrument was evaluated with 642 dementia caregiver dyads from the REACH II program. RESULTS : The measure was found to have acceptable internal consistency for a multidimensional scale and similar measurement properties for each of the racial and ethnic groups. Concurrent validity was also demonstrated for the measure. CONCLUSION : The REACH Risk Appraisal Measure developed in this study shows promise as an assessment tool that can be used in research, clinical, and community settings to guide, prioritize, and target needed areas of support for caregivers of patients with dementia.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/66234/1/j.1532-5415.2009.02260.x.pd
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