1,321 research outputs found

    The phylogeny of Anophelinae revisited: inferences about the origin and classification of Anopheles (Diptera: Culicidae)

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    © 2015 Royal Swedish Academy of Sciences. "This is the pre-peer reviewed version of the following article: Harbach, R. E. and I. J. Kitching (2016). "The phylogeny of Anophelinae revisited: inferences about the origin and classification of Anopheles (Diptera: Culicidae)." Zoologica Scripta 45(1): 34-47, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/zsc.12137/full. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

    No black holes at IceCube

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    We discuss modifications of the neutrino-nucleon cross section due to a minimal length scale. It is shown that the enhancement of the nu-N cross section due to new physics is suppressed. Especially the potential observation rate of micro black holes at neutrino telescopes is strongly reduced

    No Black Holes at IceCube

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    We discuss modifications of the neutrino-nucleon cross section due to a minimal length scale. It is shown that the enhancement of the nu-N cross section due to new physics is suppressed. Especially the potential observation rate of micro black holes at neutrino telescopes is strongly reduced.Comment: 10 pages, 5 figures, submitted to Journal of Cosmology and Astroparticle Physic

    Modification of the Casimir Effect due to a Minimal length scale

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    The existence of a minimal length scale, a fundamental lower limit on spacetime resolution is motivated by various theories of quantum gravity as well as string theory. Classical calculations involving both quantum theory and general relativity yield the same result. This minimal length scale is naturally of the order of the Planck length, but can be as high as ~TeV^-1 in models with large extra dimensions. We discuss the influence of a minimal scale on the Casimir effect on the basis of an effective model of quantum theory with minimal length.Comment: To appear in the proceedings of Lake Louise Winter Institute 2005 on Fundamental Interactions (LL WI 2005), Lake Louise, Alberta, Canada, 20-26 Feb 200

    The phylogenetic conundrum of Lutzia(Diptera: Culicidae: Culicini): a cautionary account of conflict and support

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    This is an open access article, available to all readers online, published under a creative commons licensing (https://creativecommons.org/licenses/by/4.0/). This document is the author's submitted version of the journal article. You are advised to consult the publisher's version if you wish to cite from it

    Factors influencing the temperature sensitivity of PMMA based optical fiber Bragg gratings

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    The Bragg wavelength of a PMMA based fiber grating is determined by the effective core index and the grating pitch, which, in temperature sensing, depend on the thermo-optic and thermal expansion coefficients of PMMA. These two coefficients are a function of surrounding temperature and humidity. Amorphous polymers including PMMA exhibit a certain degree of anisotropic thermal expansion. The anisotropic nature of expansion mainly depends on the polymer processing history. The expansion coefficient is believed to be lower in the direction of the molecular orientation than in the direction perpendicular to the draw direction. Such anisotropic behavior of polymers can be expected in drawn PMMA based optical fiber, and will lead to a reduced thermal expansion coefficient and larger temperature sensitivity than would be the case were the fiber to be isotropic. Extensive work has been carried out to identify these factors. The temperature responses of gratings have been measured at different relative humidity. Gratings fabricated on annealed and non-annealed PMMA optical fibers are used to compare the sensitivity performance as annealing is considered to be able to mitigate the anisotropic effect in PMMA optical fiber. Furthermore an experiment has been designed to eliminate the thermal expansion contribution to the grating wavelength change, leading to increased temperature sensitivity and improved response linearity

    Private Sector Participation in Water and Sanitation for Developing Countries

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    Wasserversorgung, Privatisierung, Regulierung, Entwicklungsländer, Water supply, Privatization, Regulation, Developing countries

    Signatures of a minimal length scale in high precision experiments

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    We discuss modifications of the gyromagnetic moment of electrons and muons due to a minimal length scale combined with a modified fundamental scale MfM_f. First-order deviations from the theoretical standard model value for g2g-2 due to these String Theory-motivated effects are derived. A constraint of Mf>577GeVM_f>577 GeV for the new fundamental scale is given.Comment: Proceedings of the Nuclear Physics Winter Meeting 2004, Bormio, Ital

    Die ewige Suche nach dem Glück – was sagt die Medizin dazu?

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    Letter, 1951 August 2, from Otto A. Harbach to Writer Members

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    1 page, Harbach is the President of the American Society of Composers, Authors and Publishers. Carson Robison is a writer member of this organization. This letter is an add on to the writer distribution system
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