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Search: (WFRF:(Valgimigli M)) > (2011-2014)

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1.
  • Garello, Roberto, et al. (author)
  • Peer-to-Peer Cooperative Positioning
  • 2012
  • In: Inside GNSS.
  • Journal article (other academic/artistic)abstract
    • In this second part of a discussion of peer-to-peer cooperative positioning, we revisit the topic of sharing critical information across clusters of GNSS users. This article focuses on users within GNSS-challenged environments equipped with both a GNSS receiver and a terrestrial ranging system. Multiple methods for sharing position information across users are examined. The authors show that strategically sharing information can greatly enhance the availability of the position solutions to the network as a whole.
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2.
  • Garemark, Jonas, et al. (author)
  • Strong, Shape-Memory Aerogel via Wood Cell Wall Nanoscale Reassembly
  • 2023
  • In: ACS Nano. - : American Chemical Society (ACS). - 1936-0851 .- 1936-086X. ; 17:5, s. 4775-4789
  • Journal article (peer-reviewed)abstract
    • Polymer shape-memory aerogels (PSMAs) are prospects in various fields of application ranging from aerospace to biomedicine, as advanced thermal insulators, actuators, or sensors. However, the fabrication of PSMAs with good mechanical performance is challenging and is currently dominated by fossil-based polymers. In this work, strong, shape-memory bio-aerogels with high specific surface areas (up to 220 m2/g) and low radial thermal conductivity (0.042 W/mK) were prepared through a one-step treatment of native wood using an ionic liquid mixture of [MTBD]+[MMP]−/DMSO. The aerogel showed similar chemical composition similar to native wood. Nanoscale spatial rearrangement of wood biopolymers in the cell wall and lumen was achieved, resulting in flexible hydrogels, offering design freedom for subsequent aerogels with intricate geometries. Shape-memory function under stimuli of water was reported. The chemical composition and distribution, morphology, and mechanical performance of the aerogel were carefully studied using confocal Raman spectroscopy, AFM, SAXS/WAXS, NMR, digital image correlation, etc. With its simplicity, sustainability, and the broad range of applicability, the methodology developed for nanoscale reassembly of wood is an advancement for the design of biobased shape-memory aerogels.
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  • Result 1-3 of 3

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