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  • 1
    Language: English
    In: Thin Solid Films, Feb 28, 2014, Vol.553, p.26(4)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.tsf.2013.11.030 Byline: Martin Becker, Robert Hamann, Angelika Polity, Bruno K. Meyer Abstract: Stannic oxide (SnO.sub.2) is of great technological interest as a member of the important family of oxide materials that combine low electrical resistance with high optical transparency in the visible range of the electromagnetic spectrum. Tin oxide thin films are grown on sapphire substrates by ion beam sputtering method with varying heater temperature from 100 to 750[degrees]C at constant gas flux. Enhancement of crystallinity of thin films with temperature is observed from X-ray diffraction and Raman spectroscopy studies. Morphological studies by atomic force microscopy reveal changes in grain size with variation in substrate temperature.
    Keywords: Raman Spectroscopy ; Thin Films
    ISSN: 0040-6090
    Source: Cengage Learning, Inc.
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  • 2
    Language: English
    In: Proceedings of the National Academy of Sciences of the United States of America, 16 May 2017, Vol.114(20), pp.5231-5236
    Description: Mature B cells coexpress both IgM and IgD B-cell antigen receptor (BCR) classes, which are organized on the cell surface in distinct protein islands. The specific role of the IgD-BCR is still enigmatic, but it is colocalized with several other receptors on the B-cell surface, including the coreceptor CD19. Here, we report that the chemokine receptor CXCR4 is also found in proximity to the IgD-BCR. Furthermore, B cells from IgD-deficient mice show defects in CXCL12-mediated CXCR4 signaling and B-cell migration, whereas B cells from IgM-deficient mice are normal in this respect. CXCR4 activation results in actin cytoskeleton remodeling and PI3K/Akt and Erk signaling in an IgD-BCR-dependent manner. The defects in CXCR4 signaling in IgD-deficient B cells can be overcome by anti-CD19 antibody stimulation that also increases CXCL12-mediated B-cell migration of normal B cells. These results show that the IgD-BCR, CD19, and CXCR4 are not only colocalized at nanometer distances but are also functionally connected, thus providing a unique paradigm of receptor signaling cross talk and function.
    Keywords: B-Cell Antigen Receptor ; Cxcr4 ; Igd ; Cytoskeleton ; Signaling ; Immunoglobulin D -- Metabolism ; Receptors, Antigen, B-Cell -- Metabolism ; Receptors, Cxcr4 -- Metabolism
    ISSN: 00278424
    E-ISSN: 1091-6490
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  • 3
    Language: English
    In: Journal of Applied Physics, May 14, 2015, Vol.117(18)
    Description: The article describes the deposition, analysis and optimization of thin films of doped V[O.sub.2] with regard to their solar energy transmittance ([T.sub.sol]) and visible/luminous light transmittance ([T.sub.lum]). The doping with alkaline earth metals (AEM) like Mg, Ca, Sr, or Ba caused an increase in both [T.sub.sol] and [T.sub.lum] due to a bandgap widening and an associated absorption edge blue-shift; thus, the brown-yellowish color impression of pure V[O.sub.2] thin films, which is a main obstacle limiting the usage of V[O.sub.2] as thermochromic window coating, is surmounted.
    Keywords: Semiconductor Doping – Analysis ; Alkaline Earth Metals – Chemical Properties ; Vanadium Compounds – Thermal Properties ; Vanadium Compounds – Optical Properties
    ISSN: 0021-8979
    Source: Cengage Learning, Inc.
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  • 4
    Language: English
    In: The Journal of the Acoustical Society of America, October 2016, Vol.140(4), pp.EL364
    Description: For the enhancement of single-channel speech corrupted by acoustic noise, recently short-time Fourier transform domain clean speech estimators were proposed that incorporate prior information about the clean speech spectral phase. Instrumental measures predict quality improvements for the phase-aware estimators over their conventional phase-blind counterparts. In this letter, these predictions are verified by means of listening experiments. The phase-aware amplitude estimator on average achieves a stronger noise reduction and is significantly preferred over its phase-blind counterpart in a pairwise comparison even if the clean spectral phase is estimated blindly on the noisy signal.
    Keywords: Speech
    ISSN: 00014966
    E-ISSN: 1520-8524
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  • 5
    Language: English
    In: Journal of Banking and Finance, April 2012, Vol.36(4), pp.1152-1163
    Description: ► We model market prices’ reaction to fundamental news with a news impact curve. ► Volatility ratios measure intraday overreaction through the extent of price reversals. ► Separation of intraday overreaction to good and to bad news is possible. ► Without overreaction, the ratios’ distribution is bounded above by an -distribution. ► Significant overreaction to bad news is prevalent for intraday stock price processes. We introduce a model for stock prices consisting of a fundamental price process and a news impact curve, which allows for either overreaction, underreaction, or correct response to changes of the fundamental value. We further develop statistics based on OHLC data, which separately measure upside and downside overreaction. The distribution of these statistics under the hypothesis of correct response and fundamental prices following Brownian motions is used to derive tests for upside and downside overreaction. We show that more realistic and frequently used fundamental price processes with correct response leave the distribution of the test statistics widely unaffected or lead to conservative tests. Empirical application to different stock markets provides strong evidence for intraday overreaction, particularly to bad news. The economic significance of the discrimination induced by the proposed statistics is further illustrated by analyzing the performance of a simple buy on bad news strategy.
    Keywords: Intraday Overreaction ; Ohlc Data ; Lévy Processes ; Stochastic Time Changes ; Buy on Bad News ; Business
    ISSN: 0378-4266
    E-ISSN: 1872-6372
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  • 6
    In: Romanistisches Jahrbuch, 2017, Vol.68(1), pp.31-63
    Description: This article analyses Tullio DeMauro’s linguistic thought and highlights the originality of his contribution to the current linguistic debate, which revolves around two essential questions: 1.What is special about the human language (faculty)?, and 2. Why and how did it arise in the selectional process of evolution? De Mauro’s approach to language between the poles of “nature” and “history” is contrasted with the basic tenets and ideas of two main paradigms of the contemporary Anglo-American linguistic discourse, namely Noam Chomsky’s generative approach (in its minimalist version) and Ray Jackendoff’s theory of the Tripartite Parallel Architecture of language. In this way, the peculiarities and the special value of De Mauro’s approach come to the fore, combining and synthesizing the European tradition of linguistic thought, especially with its strong semiotic imprint, and modern “naturalist” linguistic theory.
    Keywords: De Mauros, Tullio ; Chomsky, Noam ; Language ; Minimalist Program ; Linguistics ; Semiotics ; Theoretical Linguistics;
    ISSN: 0080-3898
    E-ISSN: 1613-0413
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  • 7
    In: Suicide and Life‐Threatening Behavior, April 2018, Vol.48(2), pp.218-229
    Description: One hundred sixty‐two resident assistants (s) at a large southeastern university were randomly assigned to attend either a specialized 1‐hr training program in suicide prevention (intervention group) or a stress and time management skills training program (control group). The results failed to show the suicide prevention training program had any impact on intervention behaviors, resident help‐seeking behaviors, or perceptions of resident distress and suicidality 4 months following training. Results are interpreted and discussed in relation to strengthening suicide prevention training programs on college campuses.
    Keywords: College Students ; Training ; Suicides & Suicide Attempts;
    ISSN: 0363-0234
    E-ISSN: 1943-278X
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  • 8
    Language: English
    In: Proceedings of the National Academy of Sciences of the United States, July 16, 2013, Vol.110(29), p.11893(6)
    Description: The mechanisms by which arterial fate is established and maintained are not clearly understood. Although a number of signaling pathways and transcriptional regulators have been implicated in arterio-venous differentiation, none are essential for arterial formation, and the manner in which widely expressed factors may achieve arterial-specific gene regulation is unclear. Using both mouse and zebrafish models, we demonstrate here that arterial specification is regulated combinatorially by Notch signaling and SoxF transcription factors, via direct transcriptional gene activation. Through the identification and characterization of two arterial endothelial cell-specific gene enhancers for the Notch ligand Delta-like ligand 4 (DII4), we show that arterial DII4 expression requires the direct binding of both the RBPJ/Notch intracellular domain and SOXF transcription factors. Specific combinatorial, but not individual, loss of SOXF and RBPJ DNA binding ablates all DII4 enhancerotransgene expression despite the presence of multiple functional ETS binding sites, as does knockdown of sox7; sox18 in combination with loss of Notch signaling. Furthermore, triple knockdown of sox7, sox18 and rbpj also results in ablation of endogenous dII4 expression. Fascinatingly, this combinatorial ablation leads to a loss of arterial markers and the absence of a detectable dorsal aorta, demonstrating the essential roles of SoxF and Notch, together, in the acquisition of arterial identity. arterial-specific enhancer | CSL www.pnas.org/cgi/doi/10.1073/pnas.1300805110
    Keywords: Transcription (Genetics) -- Research ; Dna Binding Proteins -- Physiological Aspects ; Ligands (Biochemistry) -- Physiological Aspects ; Zebrafish -- Physiological Aspects ; Zebrafish -- Genetic Aspects
    ISSN: 0027-8424
    Source: Cengage Learning, Inc.
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  • 9
    In: Medicine & Science in Sports & Exercise, 2017, Vol.49(5S Suppl 1), pp.1052-1052
    ISSN: 0195-9131
    Source: Copyright © 2013 Lippincott Williams & Wilkins. All rights reserved.〈img src=http://exlibris-pub.s3.amazonaws.com/LWW%20logo.png style="vertical-align:middle;margin-left:7px"〉
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  • 10
    Language: English
    In: Thin Solid Films, 28 February 2014, Vol.553, pp.26-29
    Description: Stannic oxide (SnO ) is of great technological interest as a member of the important family of oxide materials that combine low electrical resistance with high optical transparency in the visible range of the electromagnetic spectrum. Tin oxide thin films are grown on sapphire substrates by ion beam sputtering method with varying heater temperature from 100 to 750 °C at constant gas flux. Enhancement of crystallinity of thin films with temperature is observed from X-ray diffraction and Raman spectroscopy studies. Morphological studies by atomic force microscopy reveal changes in grain size with variation in substrate temperature.
    Keywords: Ion Beam Sputtering ; Tin Dioxide ; Radio Frequency Ion Thruster ; Structural Properties ; Engineering ; Physics
    ISSN: 0040-6090
    E-ISSN: 1879-2731
    Source: ScienceDirect Journals (Elsevier)
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