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  • 2015-2019  (6)
  • 1910-1914  (7)
  • 1
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    Influence of different geological structures on stress–strain state of hard rock mass (2018)
    Institute of Physics (IOP)
    Details
    Publication Date: 2018-03-28
    Description: The results of numerical simulation of stress–strain state in a hard rock mass area with the complex geological structures are presented. The variants of the stress value change are considered depending on the boundary conditions and physical properties of the model blocks. Furthermore, the possibility of in-situ stress formation under the influence of energy coming from the deeper Earth’s layers is demonstrated in terms of the Khibiny Massif.
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
    Published by Institute of Physics (IOP)
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  • 2
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    Electrical conductance of a sandstone partially saturated with varying concentrations of NaCl solutions (2017)
    Oxford University Press
    Details
    Publication Date: 2017-04-19
    Description: 〈span class="paragraphSection"〉〈div class="boxTitle"〉Abstract〈/div〉Electrical conductance 〈span style="font-style:italic;"〉G〈/span〉 at 100 kHz of Berea sandstone initially saturated with varying NaCl concentrations was measured by an impedance meter at decreasing water saturation. The obtained conductance 〈span style="font-style:italic;"〉G〈/span〉 values can be well simulated by the model equation composed of conductance of bulk pore water and that of mineral surfaces by introducing both tortuosities of bulk pore water τ〈sub〉b〈/sub〉 and mineral surfaces τ〈sub〉s〈/sub〉. The surface conductivity Σ〈sub〉s〈/sub〉 = 2.1 × 10〈sup〉− 10〈/sup〉 S and the tortuosity of mineral surfaces τ〈sub〉s〈/sub〉 = 2.6 in this equation can be valid for most of the data at varying water saturation except for the lowest water saturation (〈span style="font-style:italic;"〉S〈/span〉〈sub〉w〈/sub〉 = 0.05). The tortuosity of pore water τ〈sub〉b〈/sub〉 increased from 1.7 at 〈span style="font-style:italic;"〉S〈/span〉〈sub〉w〈/sub〉 = 1.0 to 15 at 〈span style="font-style:italic;"〉S〈/span〉〈sub〉w〈/sub〉 = 0.05 with a power law relationship. The present electrical conduction model with double tortuosities of bulk pore water τ〈sub〉b〈/sub〉 and mineral surfaces τ〈sub〉s〈/sub〉 can be considered as an alternative expression of the combined Archie's first and second laws in terms of tortuosities and would be useful for describing conductance of electrolyte containing partially saturated rocks including very low water saturation.〈/span〉
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 3
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    JSF data file description - 0004824_REV_1.20 - March 2016 (2016)
    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Details
    Publication Date: 2017-02-28
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 4
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    Track line map of POLARSTERN campaigns (2016)
    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Details
    Publication Date: 2016-10-26
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 5
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    Verzeichnis der Dubletten des „Rijks Herbarium” zu Leiden, welche im Tausch gegen ungefähr gleichwertigen Material zur Verteilung bereit sind (1910)
    In:  Mededeelingen van 's Rijks Herbarium, Leiden (1570-3223) vol.7 (1910) nr.1 p.91
    Details
    Publication Date: 2015-06-05
    Description: Es wird ersucht, die gewünschten Exemplare in diesem Verzeichnis zu bezeichnen und dasselbe baldigst an die Direktion zurückzusenden.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 6
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    Die von Dr. Th. Herzog auf seiner zweiten Reise durch Bolivien in den Jahren 1910 und 1911 gesammelten Pflanzen. Teil I (1913)
    In:  Mededeelingen van 's Rijks Herbarium, Leiden (1570-3223) vol.19 (1913) nr.1 p.1
    Details
    Publication Date: 2015-06-05
    Description: In der äusseren Form und Anordnung wird die Bearbeitung der botanischen Ausbeute von Dr. HERZOG’S zweiter bolivianischer Reise in ähnlicher Weise erfolgen, wie die Beschreibung der Pflanzen von Dr. ELBERT’S Sunda-expedition des Frankfurter Vereins für Geographie und Statistik (siehe diese Mededeelingen no. 14). Auch für Dr. HERZOG’S Pflanzen hat eine ansehnliche Zahl von Spezialisten bereitwilligst ihre Mitarbeit zugesagt, wofür ihnen auch an dieser Stelle aufrichtig gedankt sei. Zum besseren Verständnis der Fund-und Standortsangaben hat Dr. HERZOG den folgenden Bericht über den Gang seiner Reise eingesandt. „Vom derzeitigen Endpunkt der nordargentinischen Eisenbahn Ledesma ausgehend, reiste ich auf dem normalen Karawanenweg durch die breite Ebene des Rio Bermejo, immer nahe dem Kordillerenrand, teilweise über seine äussersten Schwellen hin, nach Yacuiba an der bolivianischen Grenze. Bis dahin führte der Weg, soweit er in der Ebene verlief, durch den typischen Chacowald mit selbständigen und beigemengten Xerophytenformationen, da und dort unterbrochen von fleckenartigen Kampstrecken, am Gebirgsrand jedoch durch einen regengrünen hochstämmigen Bergwald, wie er den Ostbang der Kordillere von den subtropischen Provinzen Tucumán und Salta an nordwärts bis tief nach Bolivia hinein mit ziemlich gleich bleibendem Charakter begleitet. Ein Abstecher von Yacuiba ostwärts an den Rio Pilcomayo liess mich die extremste Xerophytenvegetation, den dornenreichen „Monte” kennen lernen. Die noch herrschende Trockenheit (November) war jedoch meiner sammlerischen Tätigkeit ungünstig, da noch viele Gewächse blattlos standen und kaum zu blühen begannen. Auch waren wegen Futtermangels längere Aufenthalte gerade in den interessantesten Teilen ausgeschlossen. Die beste Zeit dürfte hier Dezember bis Februar sein. Bei Villa Montes wurde wieder der Gebirgsrand erreicht.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 7
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    Verslag. Omtrent den toestand van ’s Rijks Herbarium gedurende het jaar 1909/1910 (1910)
    In:  Mededeelingen van 's Rijks Herbarium, Leiden (1570-3223) vol.6 (1910) nr.1 p.79
    Details
    Publication Date: 2015-06-05
    Description: Met de uitvoering der bouwplannen in het vorige jaarverslag vermeld, werd in het najaar van 1909 een begin gemaakt. De stand der werkzaamheden bij het einde van den verslagtijd geeft alle aanleiding tot de verwachting, dat de beide gebouwen nog in den loop van 1910 onder den kap zullen komen.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 8
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    Buchbesprechungen (2018)
    Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research
    In:  EPIC3Polarforschung, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research, 88(1), pp. 62, ISSN: 00322490
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Polarforschung" , peerRev
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  • 9
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    Trophic niche partitioning of littoral fish species from the rocky intertidal of Helgoland, Germany (2015)
    Springer Verlag
    In:  EPIC3Helgoland Marine Research, Springer Verlag, 69, pp. 385-399
    Details
    Publication Date: 2015-12-14
    Description: During a three-year field study, interspecific and interannual differences in the trophic ecology of littoral fish species were investigated in the rocky intertidal of Helgoland Island (North Sea). We investigated trophic niche partitioning of common coexisting littoral fish species based on a multi tracer approach using stable isotope and fatty acids in order to show differences and similarities in resource use and feeding modes. The results of the dual tracer approach showed clear trophic niche partitioning of the five target fish species, the goldsinny wrasse Ctenolabrus rupestris, the sand goby Pomatoschistus minutus, the painted goby Pomatoschistus pictus, the short-spined sea scorpion Myoxocephalus scorpius and the long-spined sea scorpion Taurulus bubalis. Both stable isotopes and fatty acids showed distinct differences in the trophic ecology of the studied fish species. However, the combined use of the two techniques added an additional resolution on the interannual scale. The sand goby P. minutus showed the largest trophic plasticity with a pronounced variability between years. The present data analysis provides valuable information on trophic niche partitioning of fish species in the littoral zones of Helgoland and on complex benthic food webs in general.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 10
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    Fredericus Anna Jentink (1913)
    In:  Notes from the Leyden Museum vol. 35 no. 3/4, pp. 252b-254
    Details
    Publication Date: 2024-01-12
    Description: By his decease the Leyden Museum of Natural History has lost a Director, who during nearly thirty years has given all his energy to this Institution, has tried to extend and to complete its collections and to bring its internal arrangement more in agreement with modern views. In the first years of his employment at the Museum (Conservator, 1875\xe2\x80\x9484) he had the good fortune to study under the guidance of Hermann Schlegel and to be introduced by him in the System of the Mammals; for to this class he applied nearly all his scientific labour and he has published a great number of papers on them. Especially by his publications on the Bats and the Rodentia he became known as a learned and accurate scientific investigator. However a good deal of his time in the latest years of his life has been devoted to the foundation of a new Museum, in which he endeavoured to realise the idea of a complete separation between the scientific and the public collections and thus to effectuate \xe2\x80\x9edas Ideal eines naturhistorisehen Museums\xe2\x80\x9d.\nHis opinion regarding this question he explained in a communication to the International Congress of Zoology at Bern; for he was not only an assiduous visitor of these international assemblies, but as a President of the Congress at Leyden in 1895, he was also a member of the Comit\xc3\xa9 Permanent. Returning from the latest congress at Monaco he showed the first traces of an illness, that in a few months has ruined his vigorous constitution.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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