REGULATING MAMMOGRAMS

Mammography is widely used as a cancer detection device; unfortunately, it is often misused or performed inadequately. The need for proper supervision and regulation is of a concern to every woman

Obesity in childhood

This issue of eMedRef provides information to clinicians on the pathophysiology, diagnosis, and therapeutics of obesity in childhood

Cascading effects of BPT for child internalizing problems and caregiver depression

Behavioral Parent Training (BPT) is the standard of care for early onset (3 to 8 years old) disruptive behavior disorders (DBDs). Preliminary evidence suggests that BPT may also produce cascading treatment effects for comorbid and interrelated symptomatology in children, primarily internalizing problems, as well as symptomatology in multiple systems of the family, including caregiver depressive symptomatology. What is less well understood, however, is why and how BPT functions to impact these multiple symptom clusters within and between family members. Accordingly, this manuscript aims to serve as a conceptual and theoretical consideration of the mechanisms through which BPT may produce generalized treatment effects among children with early onset DBDs and internalizing problems, as well as the psychosocial difficulties among their caregivers. It is our intention that the hypothesized mechanisms highlighted in this review may guide advances in clinical research, as well as assessment and practice

Thermographic Phosphor Measurements of Shock-Shock Interactions on a Swept Cylinder

The effects of fin leading-edge radius and sweep angle on peak heating rates due to shock-shock interactions were investigated in the NASA Langley Research Center 20-inch Mach 6 Air Tunnel. The fin model leading edges, which represent cylindrical leading edges or struts on hypersonic vehicles, were varied from 0.25 inches to 0.75 inches in radius. A 9deg wedge generated a planar oblique shock at 16.7deg to the flow that intersected the fin bow shock, producing a shock-shock interaction that impinged on the fin leading edge. The fin angle of attack was varied from 0deg (normal to the free-stream) to 15deg and 25deg swept forward. Global temperature data was obtained from the surface of the fused silica fins using phosphor thermography. Metal oil flow models with the same geometries as the fused silica models were used to visualize the streamline patterns for each angle of attack. High-speed zoom-schlieren videos were recorded to show the features and temporal unsteadiness of the shock-shock interactions. The temperature data were analyzed using one-dimensional semi-infinite as well as one- and two-dimensional finite-volume methods to determine the proper heat transfer analysis approach to minimize errors from lateral heat conduction due to the presence of strong surface temperature gradients induced by the shock interactions. The general trends in the leading-edge heat transfer behavior were similar for the three shock-shock interactions, respectively, between the test articles with varying leading-edge radius. The dimensional peak heat transfer coefficient augmentation increased with decreasing leading-edge radius. The dimensional peak heat transfer output from the two-dimensional code was about 20% higher than the value from a standard, semi-infinite onedimensional method

The Use Of Deep Learning Strategies In Online Business Courses To Impact Student Retention

Interest, application and understanding—these are key elements in successful online classroom experiences and all part of what is commonly referred to as deep learning.  Deep learning occurs when students are able to connect with course topics, find value in them and see how to apply them to real-world situations.  Asynchronous discussion forums in business courses offer excellent opportunities for instructors to promote deep learning and, thereby, positively impact retention rates.  Instructional strategies that encourage deeper thought and further consideration of course topics not only lead to robust discussions but also to heightened student interest and motivation levels.  This paper presents a review of deep learning strategies, explains how they can be successfully incorporated into asynchronous course discussions and highlights several critical connections between deep learning and increased student retention

Diverse CD81 proteins support hepatitis C virus infection.

Hepatitis C virus (HCV) entry is dependent on CD81. To investigate whether the CD81 sequence is a determinant of HCV host range, we expressed a panel of diverse CD81 proteins and tested their ability to interact with HCV. CD81 large extracellular loop (LEL) sequences were expressed as recombinant proteins; the human and, to a low level, the African green monkey sequences bound soluble HCV E2 (sE2) and inhibited infection by retrovirus pseudotype particles bearing HCV glycoproteins (HCVpp). In contrast, mouse or rat CD81 proteins failed to bind sE2 or to inhibit HCVpp infection. However, CD81 proteins from all species, when expressed in HepG2 cells, conferred susceptibility to infection by HCVpp and cell culture-grown HCV to various levels, with the rat sequence being the least efficient. Recombinant human CD81 LEL inhibited HCVpp infectivity only if present during the virus-cell incubation, consistent with a role for CD81 after virus attachment. Amino acid changes that abrogate sE2 binding (I182F, N184Y, and F186S, alone or in combination) were introduced into human CD81. All three amino acid changes in human CD81 resulted in a molecule that still supported HCVpp infection, albeit with reduced efficiency. In summary, there is a remarkable plasticity in the range of CD81 sequences that can support HCV entry, suggesting that CD81 polymorphism may contribute to, but alone does not define, the HCV susceptibility of a species. In addition, the capacity to support viral entry is only partially reflected by assays measuring sE2 interaction with recombinant or full-length CD81 proteins

Emotions and Casual Teachers: Implications of the Precariat for Initial Teacher Education.

It is the norm for the casual teaching precariat to experience insecure labour conditions requiring an additional skill set to teachers with stable employment. As more beginning teachers than ever before commence work in casual employment – often a tenuous and unsupported transition into the profession - it is beholden on teacher educators to re-think aspects of their preparation. Four teacher educators undertook ‘memory work’ based on their previous experiences as casual teachers. Content analysis of follow up focus group discussions stressed the emotional and challenging nature of casual teaching, for both novice and experienced teachers. Findings from this small study, as well as previous research on casual beginning teachers and casual teachers, provide significant insights that have ramifications for initial teacher education, highlighting the importance of the emotional practices of teachers

Inference of single-cell phylogenies from lineage tracing data using Cassiopeia.

The pairing of CRISPR/Cas9-based gene editing with massively parallel single-cell readouts now enables large-scale lineage tracing. However, the rapid growth in complexity of data from these assays has outpaced our ability to accurately infer phylogenetic relationships. First, we introduce Cassiopeia-a suite of scalable maximum parsimony approaches for tree reconstruction. Second, we provide a simulation framework for evaluating algorithms and exploring lineage tracer design principles. Finally, we generate the most complex experimental lineage tracing dataset to date, 34,557 human cells continuously traced over 15 generations, and use it for benchmarking phylogenetic inference approaches. We show that Cassiopeia outperforms traditional methods by several metrics and under a wide variety of parameter regimes, and provide insight into the principles for the design of improved Cas9-enabled recorders. Together, these should broadly enable large-scale mammalian lineage tracing efforts. Cassiopeia and its benchmarking resources are publicly available at www.github.com/YosefLab/Cassiopeia

A New Brief Measure of Oral Quality of Life

INTRODUCTION. We developed a brief measure of the impact of oral conditions on individual functioning and well-being, known as oral quality of life. METHODS. Among older male veterans (N = 827) and community dental patients (N = 113), we administered surveys consisting of extant oral quality of life items, using clinical dental data from the veteran samples. We assigned each oral quality of life item to a theoretical dimension, conducted an iterative series of multitrait scaling analyses to examine the item-fit with the dimensions, reduced the number of items, and examined the psychometric characteristics of new scales and their association with clinical indices. RESULTS. We developed two brief oral quality of life scales, one consisting of 12 items and the other of 6, the latter a subset of the former. Each demonstrated sound psychometric properties and was sensitive to clinical indices. CONCLUSION. The two brief oral quality of life scales can be used to assess the population-based impact of oral conditions as well as outcomes of dental care.National Institute of Dental and Craniofacial Research (U54 DE14264-02); U.S. Department of Veterans Affairs Health Services Research and Development Service (IIR 93.025, HFP 91-012, RCS 02-066-1), National Institutes of Health (U54 DE014264, K24 DE000419, K24 DE018211