2,721 research outputs found

    Evaluation of machine sewn joints for the flexible heat shield curtain

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    Feasibility of machine sewing wire reinforced asbestos and silica cloth plies of flexible heat shield curtain assembl

    An Adversorial Approach to Enable Re-Use of Machine Learning Models and Collaborative Research Efforts Using Synthetic Unstructured Free-Text Medical Data

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    We leverage Generative Adversarial Networks (GAN) to produce synthetic free-text medical data with low re-identification risk, and apply these to replicate machine learning solutions. We trained GAN models to generate free-text cancer pathology reports. Decision models were trained using synthetic datasets reported performance metrics that were statistically similar to models trained using original test data. Our results further the use of GANs to generate synthetic data for collaborative research and re-use of machine learning models

    Malignant myelomonocytic cells after in vitro infection of marrow cells with Friend leukaemia virus.

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    Infection of long-term BDF1 marrow cultures with Friend leukaemia virus complex (FLV) induced transformed cells with myelomonocytic characteristics, which were isolated only 14 days after the viral infection. Criteria for transformation were growth in suspension cultures and high plating efficiency in agar. The lymphatic leukaemia virus (LLV) replicates in these suspension cultures, but the spleen focus-forming virus (SFFV) component of the FLV complex has not been detected. Injection of the transformed cells into syngeneic neonatal or adult mice leads to the development of leukaemia which can be demonstrated to be of donor origin by the presence of two metacentric marker chromosomes which are also seen in the cultured cells

    Sediment Mixing by Invertebrates as Shown by 85KR1

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    In the event radionuclides are accidentally introduced into an estuary, many isotopes would become adsorbed on suspended particles of clay or silt; others would be incorporated into living cellular material (Caritt and Goodgal, 1954; Rice and Willis, 1959). Oysters and other filter feeders in these estuaries are capable of filtering from suspension large quantities of the suspended solids, as well as the larger living cellular material (Haven and Morales-Alamo, 1966a). Ingested material along with the associated radionuclides would be voided as compacted fecal strings or pellets (biodeposits). Many of these fecal pellets may be alternately suspended in the water mass or deposited on the bottom during a single tidal cycle (Haven and Morales-Alamo, 1968). The present paper investigates how particles in the sand or clay size range, along with adsorbed radionuclides, may be mixed into subsurface deposits

    View-Independent Action Recognition from Temporal Self-Similarities

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    A Latent Class Analysis of Community Violence Exposure and Peer Delinquency in African American Adolescents

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    Aims Person-based analyses have demonstrated wide variability among the levels of exposure to community violence (ECV) experienced by youth in disadvantaged communities. In addition, social network research has found that violence victimization tends to occur primarily among a small social group, demonstrating that levels of peer delinquency may be a factor that distinguishes among youth who experience high and low levels of ECV. Methods The current study utilized latent class analysis to examine profiles of ECV and peer delinquency in a sample of 618 African American adolescents (54.7% female; mean age = 15.8, SD = 1.41), and the relationship these profiles have to adaptive and maladaptive outcomes. Results Results demonstrated that levels of ECV and peer delinquency vary significantly among these youth, and profile membership predicts levels of delinquency, aggression, future orientation, and self-esteem. Conclusion Research and clinical implications are discussed

    An Animal-sediment study in the lower York River : February 1965 to February 1966

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    Certain invertebrates are more efficient than others in filtering solids from suspension. An equal degree of variability exists among benthic invertebrates in their ability to mix biodeposits into subsurface sediments. As a result of these differences, the degree to which suspended particulate matter and associated contaminants may be deposited or mixed into sediments may in part depend on the species present, which in turn may be dependent on sediment type. A number of investigators have examined the relation between benthic animal communities and their limiting physical factors (Smith, 1932; Mare, 1942; Dexter, 1947; Holm, 1949; Stic~1ey and Stringer, 1957; Sanders, 1956, 1958, 1960; and Jones, 1961). Except for studies on the effects of thermal effluents (Warinner and Brehmer, 1966) and the relation of the distribution of several species to sediment water (Harrison and Wass, 1965), little is known of such assemblages in the Chesapeake Bay. In this report we will examine the faunal composition at four depths in the York River, Virginia, in terms of the number of species, number of individuals and biomass, and the influence of sediment parameters on these benthic communities
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