630 research outputs found
Craniomandibular trauma and tooth loss in northern dogs and wolves : implications for the archaeological study of dog husbandry and domestication
Funding: Funding for this project was provided by an ERC Advanced Grant (#295458) to Dr. David Anderson, University of Aberdeen (http://erc.europa.eu). Financial support to Mikhail V. Sablin was provided by the Russian Foundation for Basic Research (Grant 13-04-00203; http://www.rfbr.ru/rffi/ru). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscripPeer reviewedPublisher PD
Melting and Rippling Phenomenan in Two Dimensional Crystals with localized bonding
We calculate Root Mean Square (RMS) deviations from equilibrium for atoms in
a two dimensional crystal with local (e.g. covalent) bonding between close
neighbors. Large scale Monte Carlo calculations are in good agreement with
analytical results obtained in the harmonic approximation. When motion is
restricted to the plane, we find a slow (logarithmic) increase in fluctuations
of the atoms about their equilibrium positions as the crystals are made larger
and larger. We take into account fluctuations perpendicular to the lattice
plane, manifest as undulating ripples, by examining dual layer systems with
coupling between the layers to impart local rigidly (i.e. as in sheets of
graphene made stiff by their finite thickness). Surprisingly, we find a rapid
divergence with increasing system size in the vertical mean square deviations,
independent of the strength of the interplanar coupling. We consider an
attractive coupling to a flat substrate, finding that even a weak attraction
significantly limits the amplitude and average wavelength of the ripples. We
verify our results are generic by examining a variety of distinct geometries,
obtaining the same phenomena in each case.Comment: 17 pages, 28 figure
A Second Mortuary Hiatus on Lake Baikal in Siberia and the Arrival of Small-Scale Pastoralism
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Rural organizations and land utilization on Muscatine Island: A study of social adjustments
Muscatine Island was selected as the area for this investigation because it was relatively small, isolated and characterized by a distinctive type of farming (fig. 1). It was a problem area where farming offered only limited security, where income was low and success difficult to attain. Problems of land utilization and social organization had arisen frequently on the Island. Alternative choices in farm enterprises and in social organizations were few. In such an area the complicated relations between organizations and land use were relatively easy to isolate and describe.
The central problems of this study are problems of rural organizations and their relation to land utilization. What rural organizations had developed on Muscatine Island in the past? What changes took place in Island organizations and what were the factors associated with changes which were made? What organizations were functioning at the time of this study ? What were the relations of these organizations to the problems of land utilization commonly recognized on Muscatine Island? What changes might be made in organizations which might enable them to contribute more effectively to social and economic developments? How might such changes be made
Under Egyptian Skies : Intermezzo March Two - Step
https://digitalcommons.library.umaine.edu/mmb-ps/1968/thumbnail.jp
Three-Dimensional Geometric Morphometric Analysis of Fossil Canid Mandibles and Skulls
Acknowledgements We thank C.P. Klingenberg for critical discussion of methodology. A. Drake and R. Losey were supported by a grant from the Social Sciences and Humanities Research Council of Canada grant (#SSHRC IG 435-2014-0075) and a European Research Council Grant to D. Anderson (#295458). M. Sablin acknowledges participation of ZIN RAS (state assignment № АААА-А17-117022810195-3) to this research. Supplementary information accompanies this paper at doi:10.1038/s41598-017-10232-1Peer reviewedPublisher PD
Method of producing ceramic distribution members for solid state electrolyte cells
A solid state electrolyte cells apparatus and method of producing is disclosed. The apparatus can be used for separating oxygen from an oxygen-containing feedstock or as a fuel cell for reacting fluids. Cells can be stacked so that fluids can be introduced and removed from the apparatus through ceramic distribution members having ports designed for distributing the fluids in parallel flow to and from each cell. The distribution members can also serve as electrodes to membranes or as membrane members between electrodes, The distribution member design does not contain any horizontal internal ports which allows the member to be thin. A method of tape casting in combination with an embossing method allows intricate radial ribs and bosses to be formed on each distribution member. The bosses serve as seals for the ports and allow the distribution members to be made without any horizontal internal ports
Ceramic distribution members for solid state electrolyte cells and method of producing
A solid state electrolyte cells apparatus and method of producing is disclosed. The apparatus can be used for separating oxygen from an oxygen-containing feedstock or as a fuel cell for reacting fluids. Cells can be stacked so that fluids can be introduced and removed from the apparatus through ceramic distribution members having ports designed for distributing the fluids in parallel flow to and from each cell. The distribution members can also serve as electrodes to membranes or as membrane members between electrodes. The distribution member design does not contain any horizontal internal ports which allows the member to be thin. A method of tape casting in combination with an embossing method allows intricate radial ribs and bosses to be formed on each distribution member. The bosses serve as seals for the ports and allow the distribution members to be made without any horizontal internal ports
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