1,758 research outputs found

    Practice What You Preach: California\u27s Obligation to Give Full Faith and Credit to the Vermont Civil Union

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    This Note evaluates the inter-jurisdictional effect of the Vermont Civil Union statute. A same-sex couple who enters into a civil union in Vermont currently enjoys all of the Vermont state benefits typically conferred only on married couples. The Federal Defense of Marriage Act ( DOMA ) removes the burden on states of having to afford full faith and credit to same-sex marriages. As such, this Note discusses whether the DOMA is applicable to the Vermont Civil Union in addition to same-sex marriages. Furthermore, this Note discusses whether California, if not obliged federally under the DOMA to recognize the civil union, is nonetheless obliged by its own state policy to recognize the rights conferred to parties who have entered into a civil union in Vermont. California might be considered fertile ground for this kind of inquiry because it also has a legislated domestic partnership statute that affords same-sex couples in California many of the benefits that the Vermont civil union provides to Vermont\u27s same-sex couples. This Note takes the position that in a case of first impression, a California court would have to recognize the rights conferred on a couple who went to Vermont to enter into a civil union

    Discovering affect-laden requirements to achieve system acceptance

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    Novel envisioned systems face the risk of rejection by their target user community and the requirements engineer must be sensitive to the factors that will determine acceptance or rejection. Conventionally, technology acceptance is determined by perceived usefulness and ease-of-use, but in some domains other factors play an important role. In healthcare systems, particularly, ethical and emotional factors can be crucial. In this paper we describe an approach to requirements discovery that we developed for such systems. We describe how we have applied our approach to a novel system to passively monitor users for signs of cognitive decline consistent with the onset of dementia. A key challenge was eliciting users’ reactions to emotionally charged events never before experienced by them at first hand. Our goal was to understand the range of users’ emotional responses and their values and motivations, and from these formulate requirements that would maximise the likelihood of acceptance of the system. The problem was heightened by the fact that the key stakeholders were elderly people who represent a poorly studied user constituency. We discuss the elicitation and analysis methodologies used, and our experience with tool support. We conclude by reflecting on the affect issues for RE and for technology acceptance

    Associations between teacher-reported school climate and depressive symptoms in Australian adolescents : a 5-year longitudinal study.

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    Adolescent depression is serious and common. As adolescents spend approximately 15,000 h in school, this setting is a logical place to seek etiological factors. Research suggests there are negative associations between school climate and adolescent depressive symptoms. However, such studies typically use student reports of both climate and depressive symptoms; this is problematic because common method variance results when the same individual provides information on all variables, contributing to overestimations of associations between depressive symptoms and school climate. Therefore, the purpose of this study is to examine the association between teacher-reported school climate and adolescent-reported depressive symptoms. Thus, 2545 Australian high school students participated in this 5-year longitudinal study. Students completed a measure of depressive symptoms annually; their teachers (N = 882) completed a questionnaire to evaluate the quality of the school environment (i.e., safe/orderly and supportive relationships). Multi-group latent growth models revealed that more positive teacher-reported school climate was cross-sectionally associated with fewer student-reported depressive symptoms in both boys and girls, although this association was significantly stronger for girls. Longitudinally, positive school climate was associated with lower depressive symptoms but a higher rate of change of symptoms for both boys and girls. The overall findings are consistent with previous findings with student-reported school climate. However, the gender difference and the directionality of the longitudinal association between school climate and depressive symptoms over time demonstrate that additional studies of mechanisms by which school climate is connected to adolescents’ depressive symptoms are needed

    Associations between teacher-reported school climate and depressive symptoms in Australian adolescents : a 5-year longitudinal study.

    Get PDF
    Adolescent depression is serious and common. As adolescents spend approximately 15,000 h in school, this setting is a logical place to seek etiological factors. Research suggests there are negative associations between school climate and adolescent depressive symptoms. However, such studies typically use student reports of both climate and depressive symptoms; this is problematic because common method variance results when the same individual provides information on all variables, contributing to overestimations of associations between depressive symptoms and school climate. Therefore, the purpose of this study is to examine the association between teacher-reported school climate and adolescent-reported depressive symptoms. Thus, 2545 Australian high school students participated in this 5-year longitudinal study. Students completed a measure of depressive symptoms annually; their teachers (N = 882) completed a questionnaire to evaluate the quality of the school environment (i.e., safe/orderly and supportive relationships). Multi-group latent growth models revealed that more positive teacher-reported school climate was cross-sectionally associated with fewer student-reported depressive symptoms in both boys and girls, although this association was significantly stronger for girls. Longitudinally, positive school climate was associated with lower depressive symptoms but a higher rate of change of symptoms for both boys and girls. The overall findings are consistent with previous findings with student-reported school climate. However, the gender difference and the directionality of the longitudinal association between school climate and depressive symptoms over time demonstrate that additional studies of mechanisms by which school climate is connected to adolescents’ depressive symptoms are needed

    Bacteria in Construction Site Sediment Basins

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    2010 S.C. Water Resources Conference - Science and Policy Challenges for a Sustainable Futur

    Robustness to misalignment of low-cost, compact quantitative phase imaging architectures

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    Non-interferometric approaches to quantitative phase imaging could enable its application in low-cost, miniaturised settings such as capsule endoscopy. We present two possible architectures and both analyse and mitigate the effect of sensor misalignment on phase imaging performance. This is a crucial step towards determining the feasibility of implementing phase imaging in a capsule device. First, we investigate a design based on a folded 4f correlator, both in simulation and experimentally. We demonstrate a novel technique for identifying and compensating for axial misalignment and explore the limits of the approach. Next, we explore the implications of axial and transverse misalignment, and of manufacturing variations on the performance of a phase plate-based architecture, identifying a clear trade-off between phase plate resolution and algorithm convergence time. We conclude that while the phase plate architecture is more robust to misalignment, both architectures merit further development with the goal of realising a low-cost, compact system for applying phase imaging in capsule endoscopy

    Physical and in silico approaches identify DNA-PK in a Tax DNA-damage response interactome

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    <p>Abstract</p> <p>Background</p> <p>We have initiated an effort to exhaustively map interactions between HTLV-1 Tax and host cellular proteins. The resulting Tax interactome will have significant utility toward defining new and understanding known activities of this important viral protein. In addition, the completion of a full Tax interactome will also help shed light upon the functional consequences of these myriad Tax activities. The physical mapping process involved the affinity isolation of Tax complexes followed by sequence identification using tandem mass spectrometry. To date we have mapped 250 cellular components within this interactome. Here we present our approach to prioritizing these interactions via an <it>in silico </it>culling process.</p> <p>Results</p> <p>We first constructed an <it>in silico </it>Tax interactome comprised of 46 literature-confirmed protein-protein interactions. This number was then reduced to four Tax-interactions suspected to play a role in DNA damage response (Rad51, TOP1, Chk2, 53BP1). The first-neighbor and second-neighbor interactions of these four proteins were assembled from available human protein interaction databases. Through an analysis of betweenness and closeness centrality measures, and numbers of interactions, we ranked proteins in the first neighborhood. When this rank list was compared to the list of physical Tax-binding proteins, DNA-PK was the highest ranked protein common to both lists. An overlapping clustering of the Tax-specific second-neighborhood protein network showed DNA-PK to be one of three bridge proteins that link multiple clusters in the DNA damage response network.</p> <p>Conclusion</p> <p>The interaction of Tax with DNA-PK represents an important biological paradigm as suggested via consensus findings <it>in vivo </it>and <it>in silico</it>. We present this methodology as an approach to discovery and as a means of validating components of a consensus Tax interactome.</p

    A Public–Industry Partnership for Enhancing Corn Nitrogen Research and Datasets: Project Description, Methodology, and Outcomes

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    Due to economic and environmental consequences of N lost from fertilizer applications in corn (Zea mays L.), considerable public and industry attention has been devoted to the development of N decision tools. Needed are research and databases and associated metadata, at numerous locations and years to represent a wide geographic range of soil and weather scenarios, for evaluating tool performance. The goals of this research were to conduct standardized corn N rate response field studies to evaluate the performance of multiple public-domain N decision tools across diverse soils and environmental conditions, develop and publish new agronomic science for improved crop N management, and train new scientists. The geographic scope, scale, and unique collaborative arrangement warrant documenting details of this research. The objectives of this paper are to describe how the research was undertaken, reasons for the methods, and the project’s anticipated value. The project was initiated in a partnership between eight U.S. Midwest land-grant universities, USDA-ARS, and DuPont Pioneer. Research using a standardized protocol was conducted over the 2014 through 2016 growing seasons, yielding a total of 49 sites. Preliminary observations of soil and crop variables measured from each site revealed a magnitude of differences in soil properties (e.g., texture and organic matter) as well as differences in agronomic and economic responses to applied N. The project has generated a valuable dataset across a wide array of weather and soils that allows investigators to perform robust evaluation of N use in corn and N decision tools

    3D Co-culture of hiPSC-Derived Cardiomyocytes With Cardiac Fibroblasts Improves Tissue-Like Features of Cardiac Spheroids

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    Purpose: Both cardiomyocytes and cardiac fibroblasts (CF) play essential roles in cardiac development, function, and remodeling. Properties of 3D co-cultures are incompletely understood. Hence, 3D co-culture of cardiomyocytes and CF was characterized, and selected features compared with single-type and 2D culture conditions.Methods: Human cardiomyocytes derived from induced-pluripotent stem cells (hiPSC-CMs) were obtained from Cellular Dynamics or Ncardia, and primary human cardiac fibroblasts from ScienCell. Cardiac spheroids were investigated using cryosections and whole-mount confocal microscopy, video motion analysis, scanning-, and transmission-electron microscopy (SEM, TEM), action potential recording, and quantitative PCR (qPCR).Results: Spheroids formed in hanging drops or in non-adhesive wells showed spontaneous contractions for at least 1 month with frequent media changes. SEM of mechanically opened spheroids revealed a dense inner structure and no signs of blebbing. TEM of co-culture spheroids at 1 month showed myofibrils, intercalated disc-like structures and mitochondria. Ultrastructural features were comparable to fetal human myocardium. We then assessed immunostained 2D cultures, cryosections of spheroids, and whole-mount preparations by confocal microscopy. CF in co-culture spheroids assumed a small size and shape similar to the situation in ventricular tissue. Spheroids made only of CF and cultured for 3 weeks showed no stress fibers and strongly reduced amounts of alpha smooth muscle actin compared to early spheroids and 2D cultures as shown by confocal microscopy, western blotting, and qPCR. The addition of CF to cardiac spheroids did not lead to arrhythmogenic effects as measured by sharp-electrode electrophysiology. Video motion analysis showed a faster spontaneous contraction rate in co-culture spheroids compared to pure hiPSC-CMs, but similar contraction amplitudes and kinetics. Spontaneous contraction rates were not dependent on spheroid size. Applying increasing pacing frequencies resulted in decreasing contraction amplitudes without positive staircase effect. Gene expression analysis of selected cytoskeleton and myofibrillar proteins showed more tissue-like expression patterns in co-culture spheroids than with cardiomyocytes alone or in 2D culture.Conclusion: We demonstrate that the use of 3D co-culture of hiPSC-CMs and CF is superior over 2D culture conditions for co-culture models and more closely mimicking the native state of the myocardium with relevance to drug development as well as for personalized medicine.Peer reviewe
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