88 research outputs found

    The Practice and Benefit of Applying Digital Markup in Preserving Texts and Creating Digital Editions: A Poetical Analysis of a Blank-Verse Translation of Virgil\u27s Aeneid

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    Numerous examples of the digital scholarly edition exist online, and the genre is thriving in terms of interdisciplinary interest as well as support granted by funding agencies. Some editions are dedicated to the collection and representation of the life\u27s work of a single author, others to mass digitization and preservation of centuries\u27 worth of texts. Very few of these examples, however, approach the task of in-text interpretation through visualization. This project describes an approach to digital representation and investigates its potential benefit to scholars of various disciplines. It presents both a digital edition as well as a framework of justification surrounding said edition. In addition to composing this document as an XML file, I have digitized a 1794 English translation of Virgil\u27s Aeneid and used a customized digital markup schema based on the guidelines set forth by the Text Encoding Initiative to indicate a set of poetic figures—such as simile and alliteration—within that text for analysis. While neither a translation project nor strictly a poetical analysis, this project and its unique approach to interpretive representation could prove of interest to scholars in several disciplines, including classics, digital scholarship, information management, and literary theory. The practice serves both as a case-in-point as well as an example method to replicate with future texts and projects

    The Demise of Regulation Q Differentials: Competition for Household Savins Between Commercial Banks and Savings and Loan Associations- A Note

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    William R. Reichenstein is a Visiting Professor of Finance at Southern Methodist University. Frederick H. Dorner is an Assistant Professor of Quantitative Methods at Trinity University

    Feminist, Linguistic, And Rhetorical Perspectives On Language Reform

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    As people become aware that society treats women unfairly, they also perceive related shortcomings in the way that Modern English references women. For example, many have objected to the so-called generic he, the third-person masculine pronoun employed to refer to a person of unknown gender, and provided several alternatives, few of which have been widely adopted. Nonetheless, change is evident in the case of they becoming an increasingly common solution to refer to a person of unidentified gender. The intentional reform of the Modern English language, both in the past and present, has been a result of people\u27s reactions to what is often perceived as a bias or a deficiency with what is possible to say given the words at their disposal. The rhetorical significance of reform is profound, and scholars continually broach the subject from the perspective of different disciplines. Explored here are the approaches of three of those fields, feminism, linguistics, and rhetoric; how each reacts to and even influences reform is an important part of the study. What is evident is that, regardless of the particular field, reform remains a force of change, even while it may not be broadly recognized. Further, traditional grammatical rules provide an insufficient means for tackling inequalities in Modern English, and are in part responsible for such imbalance. As such, writers must be aware of the present expectations of their audience and the situation of particular words

    Solid-State Formation Mechanisms of Core–shell Microstructures in (Zr,Ta)B2 Ceramics

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    Transition metal diborides with core–shell microstructures have demonstrated excellent mechanical properties at elevated temperatures. Previous studies concluded that core–shell microstructures were formed by liquid-assisted mass transport mechanisms, but in this study, we propose a solid-state formation mechanism for core-shell microstructures in (Zr,Ta)B2 ceramics produced by reaction hot pressing and in ZrB2-TaB2 diffusion couples. Diffusion couple experiments demonstrated that core–shell microstructures developed as a result of Ta diffusion along ZrB2 grain boundaries, which occurred concurrently with lattice diffusion of Ta into ZrB2. These findings suggest that with optimization of batching and processing parameters, core–shell diboride materials may be formed through solid-state processes rather than liquid-assisted processes, which could assist in raising the upper temperature limits of use for these materials

    Discovery and implementation of transcriptional biomarkers of synthetic LXR agonists in peripheral blood cells

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    <p>Abstract</p> <p>Background</p> <p>LXRs (Liver X Receptor α and ÎČ) are nuclear receptors that act as ligand-activated transcription factors. LXR activation causes upregulation of genes involved in reverse cholesterol transport (RCT), including ABCA1 and ABCG1 transporters, in macrophage and intestine. Anti-atherosclerotic effects of synthetic LXR agonists in murine models suggest clinical utility for such compounds.</p> <p>Objective</p> <p>Blood markers of LXR agonist exposure/activity were sought to support clinical development of novel synthetic LXR modulators.</p> <p>Methods</p> <p>Transcript levels of LXR target genes ABCA1 and ABCG1 were measured using quantitative reverse transcriptase/polymerase chain reaction assays (qRT-PCR) in peripheral blood from mice and rats (following a single oral dose) and monkeys (following 7 daily oral doses) of synthetic LXR agonists. LXRα, LXRÎČ, ABCA1, and ABCG1 mRNA were measured by qRT-PCR in human peripheral blood mononuclear cells (PBMC), monocytes, T- and B-cells treated <it>ex vivo </it>with WAY-252623 (LXR-623), and protein levels in human PBMC were measured by Western blotting. ABCA1/G1 transcript levels in whole-blood RNA were measured using analytically validated assays in human subjects participating in a Phase 1 SAD (Single Ascending Dose) clinical study of LXR-623.</p> <p>Results</p> <p>A single oral dose of LXR agonists induced ABCA1 and ABCG1 transcription in rodent peripheral blood in a dose- and time-dependent manner. Induction of gene expression in rat peripheral blood correlated with spleen expression, suggesting LXR gene regulation in blood has the potential to function as a marker of tissue gene regulation. Transcriptional response to LXR agonist was confirmed in primates, where peripheral blood ABCA1 and ABCG1 levels increased in a dose-dependent manner following oral treatment with LXR-623. Human PBMC, monocytes, T- and B cells all expressed both LXRα and LXRÎČ, and all cell types significantly increased ABCA1 and ABCG1 expression upon <it>ex vivo </it>LXR-623 treatment. Peripheral blood from a representative human subject receiving a single oral dose of LXR-623 showed significant time-dependent increases in ABCA1 and ABCG1 transcription.</p> <p>Conclusion</p> <p>Peripheral blood cells express LXRα and LXRÎČ, and respond to LXR agonist treatment by time- and dose-dependently inducing LXR target genes. Transcript levels of LXR target genes in peripheral blood are relevant and useful biological indicators for clinical development of synthetic LXR modulators.</p

    In vitro nuclear interactome of the HIV-1 Tat protein

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    <p>Abstract</p> <p>Background</p> <p>One facet of the complexity underlying the biology of HIV-1 resides not only in its limited number of viral proteins, but in the extensive repertoire of cellular proteins they interact with and their higher-order assembly. HIV-1 encodes the regulatory protein Tat (86–101aa), which is essential for HIV-1 replication and primarily orchestrates HIV-1 provirus transcriptional regulation. Previous studies have demonstrated that Tat function is highly dependent on specific interactions with a range of cellular proteins. However they can only partially account for the intricate molecular mechanisms underlying the dynamics of proviral gene expression. To obtain a comprehensive nuclear interaction map of Tat in T-cells, we have designed a proteomic strategy based on affinity chromatography coupled with mass spectrometry.</p> <p>Results</p> <p>Our approach resulted in the identification of a total of 183 candidates as Tat nuclear partners, 90% of which have not been previously characterised. Subsequently we applied <it>in silico </it>analysis, to validate and characterise our dataset which revealed that the Tat nuclear interactome exhibits unique signature(s). First, motif composition analysis highlighted that our dataset is enriched for domains mediating protein, RNA and DNA interactions, and helicase and ATPase activities. Secondly, functional classification and network reconstruction clearly depicted Tat as a polyvalent protein adaptor and positioned Tat at the nexus of a densely interconnected interaction network involved in a range of biological processes which included gene expression regulation, RNA biogenesis, chromatin structure, chromosome organisation, DNA replication and nuclear architecture.</p> <p>Conclusion</p> <p>We have completed the <it>in vitro </it>Tat nuclear interactome and have highlighted its modular network properties and particularly those involved in the coordination of gene expression by Tat. Ultimately, the highly specialised set of molecular interactions identified will provide a framework to further advance our understanding of the mechanisms of HIV-1 proviral gene silencing and activation.</p

    Roadmap on photonic, electronic and atomic collision physics: I. Light-matter interaction

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    We publish three Roadmaps on photonic, electronic and atomic collision physics in order to celebrate the 60th anniversary of the ICPEAC conference. In Roadmap I, we focus on light-matter interaction. In this area, studies of ultrafast electronic and molecular dynamics have been rapidly growing, with the advent of new light sources such as attosecond lasers and X-ray free electron lasers. In parallel, experiments with established synchrotron radiation sources and femtosecond lasers using cutting- edge detection schemes are revealing new scientific insights that have never been exploited. Relevant theories are also being rapidly developed. Target samples for photon-impact experiments are expanding from atoms and small molecules to complex systems such as biomolecules, fullerene, clusters and solids. This Roadmap aims at looking back along the road, explaining the development of these fields, and looking forward, collecting contributions from twenty leading groups from the field

    Regulation of germinal center B-cell differentiation

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    Germinal centers (GC) are the main sites where antigen‐activated B‐cell clones expand and undergo immunoglobulin gene hypermutation and selection. Iterations of this process will lead to affinity maturation, replicating Darwinian evolution on the cellular level. GC B‐cell selection can lead to four different outcomes: further expansion and evolution, apoptosis (non‐selection), or output from the GC with differentiation into memory B cells or plasma cells. T‐helper cells in GC have been shown to have a central role in regulating B‐cell selection by sensing the density of major histocompatibility complex (MHC):peptide antigen complexes. Antigen is provided on follicular dendritic cells in the form of immune complex. Antibody on these immune complexes regulates antigen accessibility by shielding antigen from B‐cell receptor access. Replacement of antibody on immune complexes by antibody generated from GC‐derived plasma cell output will gradually reduce the availability of antigen. This antibody feedback can lead to a situation where a slow rise in selection stringency caused by a changing environment leads to directional evolution toward higher affinity antibody

    Effect of Tantalum Solid Solution Additions on the Mechanical Behavior of ZrB₂

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    Mechanical properties and microstructure were compared for zirconium diboride and two zirconium diboride solid solutions containing 3 and 6 at% tantalum diboride. X-ray diffraction indicated that the ceramics were nearly phase-pure and that tantalum dissolved into the ZrB2 lattice to form (Zr,Ta)B2 solid solutions. Microstructural analysis indicated that samples achieved nearly full relative density with average grain sizes that ranged from 3-5 ÎŒm. The three compositions had similar values of Young\u27s modulus (510-531 GPa), shear modulus (225-228 GPa), Vickers hardness (15.2-16.4 GPa), and flexural strength (391-452 MPa). Fracture toughness ranged from 2.6 to 3.7 MPa m1/2 and with increasing tantalum content, the fracture mode changed from predominantly intergranular to predominantly transgranular. Diboride solid solution materials had comparable properties to the single metal diboride, but differences in microstructure, secondary phases, and strain state among the three ceramics partially obscured the actual effects of the solid solution on fracture behavior
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