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  • 1
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    Inversion of intermediate-period Rayleigh waves for source characteristics of the 1968 Tokachi-Oki earthquake (1985)
    In:  J. Geophys. Res., Edmonton, Conseil de l'Europe, vol. 90, no. 4, pp. 11374-11382, pp. B05402, (ISSN: 1340-4202)
    Details
    Publication Date: 1985
    Keywords: Seismology ; Inversion ; Rayleigh waves ; Earthquake ; Source parameters ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Histidine-rich protein from sponge biosilica [Biochemistry] (2015)
    National Academy of Sciences
    Details
    Publication Date: 2015-09-16
    Description: The hexactinellids are a diverse group of predominantly deep sea sponges that synthesize elaborate fibrous skeletal systems of amorphous hydrated silica. As a representative example, members of the genus Euplectella have proved to be useful model systems for investigating structure–function relationships in these hierarchically ordered siliceous network-like composites. Despite recent...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 3
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    Observation of enhanced thermopower due to spin fluctuation in weak itinerant ferromagnet (2019)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2019
    Description: 〈p〉Increasing demand for higher energy efficiency calls for waste heat recovery technology. Thus, facilitating practical thermoelectric generation systems is strongly desired. One option is enhancing the thermoelectric power factor, 〈i〉S〈/i〉〈sup〉2〈/sup〉/〈i〉r〈/i〉, where 〈i〉S〈/i〉 is the Seebeck coefficient and 〈i〉r〈/i〉 is the electrical resistivity, although it is still challenging because of the trade-off between 〈i〉S〈/i〉 and 〈i〉r〈/i〉. We demonstrate that enhanced 〈i〉S〈/i〉〈sup〉2〈/sup〉/〈i〉r〈/i〉 can be achieved by incorporating magnetic interaction in ferromagnetic metals via the spin fluctuation arising from itinerant electrons. We show that electron-doped Heusler alloys exhibit weak ferromagnetism at 〈i〉T〈/i〉〈sub〉C〈/sub〉 near room temperature with a small magnetic moment. A pronounced enhancement around 〈i〉T〈/i〉〈sub〉C〈/sub〉 was observed, with a 20% improvement in the power factor from the case where spin fluctuation is suppressed by applying magnetic field. This result supports the merit of using spin fluctuation to further enhance thermoelectric properties and the potential to further probe correlations and synergy between magnetic and thermoelectric fields.〈/p〉
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Sequence of the Gonium pectorale Mating Locus Reveals a Complex and Dynamic History of Changes in Volvocine Algal Mating Haplotypes (2016)
    Genetics Society of America (GSA)
    Details
    Publication Date: 2016-05-04
    Description: Sex-determining regions (SDRs) or mating-type ( MT ) loci in two sequenced volvocine algal species, Chlamydomonas reinhardtii and Volvox carteri , exhibit major differences in size, structure, gene content, and gametolog differentiation. Understanding the origin of these differences requires investigation of MT loci from related species. Here, we determined the sequences of the minus and plus MT haplotypes of the isogamous 16-celled volvocine alga, Gonium pectorale , which is more closely related to the multicellular V. carteri than to C. reinhardtii . Compared to C. reinhardtii MT , G. pectorale MT is moderately larger in size, and has a less complex structure, with only two major syntenic blocs of collinear gametologs. However, the gametolog content of G. pectorale MT has more overlap with that of V. carteri MT than with C. reinhardtii MT , while the allelic divergence between gametologs in G. pectorale is even lower than that in C. reinhardtii . Three key sex-related genes are conserved in G. pectorale MT : GpMID and GpMTD1 in MT –, and GpFUS1 in MT +. GpFUS1 protein exhibited specific localization at the plus -gametic mating structure, indicating a conserved function in fertilization. Our results suggest that the G. pectorale–V. carteri common ancestral MT experienced at least one major reformation after the split from C. reinhardtii , and that the V. carteri ancestral MT underwent a subsequent expansion and loss of recombination after the divergence from G. pectorale . These data begin to polarize important changes that occurred in volvocine MT loci, and highlight the potential for discontinuous and dynamic evolution in SDRs.
    Electronic ISSN: 2160-1836
    Topics: Biology
    Published by Genetics Society of America (GSA)
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  • 5
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    Outward-dipping ring-fault structure at rabaul caldera as shown by earthquake locations (1987)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1987-01-09
    Description: The locations of a large number of earthquakes recorded at Rabaul caldera in Papua New Guinea from late 1983 to mid-1985 have produced a picture of this active caldera's structural boundary. The earthquake epicenters form an elliptical annulus about 10 kilometers long by 4 kilometers wide, centered in the southern part of the Rabaul volcanic complex. A set of events with well-constrained depth determinations shows a ring-fault structure that extends from the surface to a depth of about 4 kilometers and slopes steeply outward from the center of the caldera. This is the first geophysical data set that clearly outlines the orientation of an active caldera's bounding faults. This orientation, however, conflicts with the configuration of many other calderas and is not in keeping with currently preferred models of caldera formation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mori, J -- McKee, C -- New York, N.Y. -- Science. 1987 Jan 9;235(4785):193-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17778631" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
    Electronic Resource
    Electronic Resource
    Sea level measurements for Inferring ground deformations in Rabaul Caldera (1987)
    Springer
    Geo-marine letters 6 (1987), S. 241-246 
    Details
    ISSN: 1432-1157
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Rabaul tide gauge records from 1968 through 1985 give the amount of vertical movement in the northern part of Rabaul Caldera. Monthly mean sea level data were compared with other regional tide gauge stations to remove large scale oceanographic effects. No large vertical movements (〉 0.3 cm/yr) were noted in this portion of the caldera. The results of sea level measurements at other points around the caldera, from 1981 through 1983 are consistent with the 1 to 10 cm of uplift observed on Matupit Island from optical leveling surveys. There was relatively little vertical movement (∼ 0.1 cm/yr) in the Vulcan area.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02239586
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    Paper (German National Licenses)
    Fulltext
  • 7
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    Editorial (2015)
    In:  International Journal of Earth Sciences
    Details
    Publication Date: 2020-02-12
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 8
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    Orthorhombic distortion and orbital order in the vanadium spinel FeV_{2} O_{4} (2016)
    American Physical Society (APS)
    Details
    Publication Date: 2016-01-14
    Description: Author(s): S. Kawaguchi, H. Ishibashi, S. Nishihara, S. Mori, J. Campo, F. Porcher, O. Fabelo, K. Sugimoto, J. Kim, K. Kato, M. Takata, H. Nakao, and Y. Kubota Using synchrotron and neutron diffraction measurements, we find a low-temperature orthorhombic phase in vanadium spinel FeV 2 O 4 . The orbital order of V 3 + ions with tetragonal normal modes occurs at 68 K, and this leads to an appearance of the pseudotetragonal phase at a noncollinear ferrimagnetic tra… [Phys. Rev. B 93, 024108] Published Wed Jan 13, 2016
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 9
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    Pelagic smectite as an important factor in tsunamigenic slip along the Japan Trench (2015)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2015-01-21
    Description: The very large slip on the shallow portion of the subduction interface during the 2011 Tohoku-oki earthquake (M w 9.0) caused a huge tsunami along the northeast coast of Honshu, Japan. In order to elucidate the mechanics of such tsunamigenic slip, the Integrated Ocean Drilling Program Expedition 343 (Japan Trench Fast Drilling Project, JFAST), was carried out one year after the earthquake and succeeded in recovering rocks constituting the active plate boundary fault. Our mineralogical analyses using X-ray diffraction reveal that the shallow portion of the fault zone that caused the earthquake is significantly enriched in smectite compared to the surrounding sediments, which may be intimately linked to the tsunamigenic shallow faulting. For comparison, we also analyzed mineralogical features of incoming sediments just prior to subduction, recovered on the outer rise of the Japan Trench (Site 436, Deep Sea Drilling Project Leg 56), and found a characteristic smectite-rich horizon in the uppermost ~5 m of the pelagic clay layer. This horizon should be mechanically weak and will become the future plate boundary fault, as observed in the JFAST cores. The smectite-rich deposits are broadly distributed in the northwestern Pacific Ocean, and may therefore potentially enhance conditions for large shallow slip during earthquakes that occur over a broad area of the Japan Trench plate boundary, which would result in large tsunamis for this region.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 10
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    Long-term temperature records following the Mw 7.9 Wenchuan (China) earthquake are consistent with low friction (2015)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2015-01-21
    Description: Knowledge of the shear stress on a fault during slip is necessary for a physically-based understanding of earthquakes. Borehole temperature measurements inside the fault zone immediately after an earthquake can record the energy dissipated by this stress. In the first Wenchuan Earthquake Fault Zone Scientific Drilling Project hole (Sichuan province, China) we repeatedly measured temperature profiles from 1.3 to 5.3 yr after the 12 May 2008, M w 7.9 Wenchuan earthquake. The previously identified candidate for the principal slip surface had only a small local temperature increase of at most 0.02 °C with no obvious decay. The small amplitude of the temperature increase provides an upper bound for the frictional heat–generated coseismic slip, but is unlikely to be a frictionally generated signal. Two larger temperature anomalies are located above and within the fault zone. However, neither anomaly evolves as expected from a frictional transient. We conclude that the frictional heat from the Wenchuan earthquake remains elusive and the total heat generated at this location is much less than 29 MJ/m 2 . Low friction during slip is consistent with the temperature data.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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