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Search: WFRF:(Weinstein S) > Engineering and Technology

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1.
  • Aartsen, M. G., et al. (author)
  • Very high-energy gamma-ray follow-up program using neutrino triggers from IceCube
  • 2016
  • In: Journal of Instrumentation. - 1748-0221 .- 1748-0221. ; 11
  • Journal article (peer-reviewed)abstract
    • We describe and report the status of a neutrino-triggered program in IceCube that generates real-time alerts for gamma-ray follow-up observations by atmospheric-Cherenkov telescopes (MAGIC and VERITAS). While IceCube is capable of monitoring the whole sky continuously, high-energy gamma-ray telescopes have restricted fields of view and in general are unlikely to be observing a potential neutrino-flaring source at the time such neutrinos are recorded. The use of neutrino-triggered alerts thus aims at increasing the availability of simultaneous multi-messenger data during potential neutrino flaring activity, which can increase the discovery potential and constrain the phenomenological interpretation of the high-energy emission of selected source classes (e. g. blazars). The requirements of a fast and stable online analysis of potential neutrino signals and its operation are presented, along with first results of the program operating between 14 March 2012 and 31 December 2015.
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2.
  • Kaucka, Marketa, et al. (author)
  • Oriented clonal cell dynamics enables accurate growth and shaping of vertebrate cartilage
  • 2017
  • In: eLIFE. - : Elife Sciences Publications LTD. - 2050-084X. ; 6
  • Journal article (peer-reviewed)abstract
    • Cartilaginous structures are at the core of embryo growth and shaping before the bone forms. Here we report a novel principle of vertebrate cartilage growth that is based on introducing transversally-oriented clones into pre-existing cartilage. This mechanism of growth uncouples the lateral expansion of curved cartilaginous sheets from the control of cartilage thickness, a process which might be the evolutionary mechanism underlying adaptations of facial shape. In rod-shaped cartilage structures (Meckel, ribs and skeletal elements in developing limbs), the transverse integration of clonal columns determines the well-defined diameter and resulting rod-like morphology. We were able to alter cartilage shape by experimentally manipulating clonal geometries. Using in silico modeling, we discovered that anisotropic proliferation might explain cartilage bending and groove formation at the macro-scale.
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