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  • Springer Nature  (99)
  • Oxford University Press  (46)
  • American Meteorological Society  (18)
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  • 2015-2019  (129)
  • 2000-2004  (18)
  • 1975-1979  (28)
  • 1
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    A scalable and operationally simple radical trifluoromethylation (2015)
    Springer Nature
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    Publikationsdatum: 2015-08-12
    Beschreibung: Article Trifluoromethylation is a key transformation, particularly for pharmaceuticals, but many reagents are expensive and difficult to scale up. Here, the authors show that trifluoroacetic anhydride can act as a CF 3 source, allowing the radical reactions to be easily and inexpensively carried out at scale. Nature Communications doi: 10.1038/ncomms8919 Authors: Joel W. Beatty, James J. Douglas, Kevin P. Cole, Corey R. J. Stephenson
    Digitale ISSN: 2041-1723
    Thema: Biologie , Chemie und Pharmazie , Allgemeine Naturwissenschaft , Physik
    Publiziert von Springer Nature
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  • 2
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    Integrating fishers knowledge research in science and management (2016)
    Oxford University Press
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    Publikationsdatum: 2016-07-13
    Beschreibung: Fishers' knowledge research (FKR) aims to enhance the use of experiential knowledge of fish harvesters in fisheries research, assessment, and management. Fishery participants are able to provide unique knowledge, and that knowledge forms an important part of "best available information" for fisheries science and management. Fishers' knowledge includes, but is much greater than, basic biological fishery information. It includes ecological, economic, social, and institutional knowledge, as well as experience and critical analysis of experiential knowledge. We suggest that FKR, which may in the past have been defined quite narrowly, be defined more broadly to include both fishery observations and fishers "experiential knowledge" provided across a spectrum of arrangements of fisher participation. FKR is part of the new and different information required in evolving "ecosystem-based" and "integrated" management approaches. FKR is a necessary element in the integration of ecological, economic, social, and institutional considerations of future management. Fishers' knowledge may be added to traditional assessment with appropriate analysis and explicit recognition of the intended use of the information, but fishers' knowledge is best implemented in a participatory process designed to receive and use it. Co-generation of knowledge in appropriately designed processes facilitates development and use of fishers' knowledge and facilitates the participation of fishers in assessment and management, and is suggested as best practice in improved fisheries governance.
    Print ISSN: 1054-3139
    Digitale ISSN: 1095-9289
    Thema: Biologie , Geologie und Paläontologie , Physik
    Publiziert von Oxford University Press
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  • 3
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    AI meets Angry Birds (2019)
    Springer Nature
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    Publikationsdatum: 2019
    Digitale ISSN: 2522-5839
    Thema: Informatik
    Publiziert von Springer Nature
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  • 4
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    A Bayesian Monte-Carlo Inversion of Spatial Auto-Correlation (SPAC) for Near-Surface Vs Structure Applied to both Broadband and Geophone Data (2019)
    Oxford University Press
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    Publikationsdatum: 2019
    Beschreibung: 〈span〉〈div〉Summary〈/div〉We propose a new Bayesian method to reveal the 〈span〉Vs〈/span〉 structure of the near surface of the earth using spatial autocorrelation (SPAC) functions and apply this new method to synthetic, broadband, and geophone datasets. The principle of SPAC is introduced, and an implementation of the Bayesian Monte Carlo inversion (BMCI) for modeling SPAC coherency functions is described. To demonstrate its effectiveness, BMCI is applied to synthetic tests, data from 14 SPAC array sites in the Salt Lake Valley (SLV), Utah, and two arrays (one broadband and one geophone) located in south central Utah. The 〈span〉Vs〈/span〉 models derived from previous SPAC analysis of the 14 SLV sites differ by 10 per cent at most from those determined by BMCI and lie within uncertainties determined for the BMCI models. These agreements demonstrate the effectiveness of the BMCI method. The synthetic tests and applications to the SLV SPAC data show BMCI has great potential to resolve 〈span〉Vs〈/span〉 structure down to at least 400 m. To achieve resolution for deeper 〈span〉Vs〈/span〉 structure, longer duration deployments, wider array apertures, and additional seismometers or geophones can be employed. Additionally, when the target frequencies are greater than 0.1 Hz, there is no apparent disadvantage in using geophone data for BMCI compared to broadband data. Most significantly, BMCI places a quantifiable constraint on the uncertainties of the 〈span〉Vs〈/span〉 models as well as 〈span〉Vs30〈/span〉.〈/span〉
    Print ISSN: 2051-1965
    Digitale ISSN: 1365-246X
    Thema: Geologie und Paläontologie
    Publiziert von Oxford University Press im Namen von The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 5
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    Historical Supernovas (1976)
    Springer Nature
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    Publikationsdatum: 1976-06-01
    Print ISSN: 0036-8733
    Digitale ISSN: 1946-7087
    Thema: Biologie , Allgemeine Naturwissenschaft , Physik
    Publiziert von Springer Nature
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  • 6
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    Sunlight-powered kHz rotation of a hemithioindigo-based molecular motor (2015)
    Springer Nature
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    Publikationsdatum: 2015-09-30
    Beschreibung: Article Although photodriven molecular motors—capable of converting light into unidirectional motion—hold promise for many applications, these typically require ultraviolet light. Here, the authors design and analyse a motor that can operate at high speeds (kHz) under visible light at ambient temperature. Nature Communications doi: 10.1038/ncomms9406 Authors: Manuel Guentner, Monika Schildhauer, Stefan Thumser, Peter Mayer, David Stephenson, Peter J. Mayer, Henry Dube
    Digitale ISSN: 2041-1723
    Thema: Biologie , Chemie und Pharmazie , Allgemeine Naturwissenschaft , Physik
    Publiziert von Springer Nature
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  • 7
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    Lasting mantle scars lead to perennial plate tectonics (2016)
    Springer Nature
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    Publikationsdatum: 2016-06-12
    Beschreibung: Article The causes of intraplate deformation remain poorly constrained. Heron et al . use numerical models to show that ancient plate tectonic processes produce mantle lithosphere structures that may be reactivated to generate intraplate deformation. Nature Communications doi: 10.1038/ncomms11834 Authors: Philip J. Heron, Russell N. Pysklywec, Randell Stephenson
    Digitale ISSN: 2041-1723
    Thema: Biologie , Chemie und Pharmazie , Allgemeine Naturwissenschaft , Physik
    Publiziert von Springer Nature
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  • 8
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    Drivers of the 2013/14 winter floods in the UK (2015)
    Springer Nature
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    Publikationsdatum: 2015-05-22
    Beschreibung: Nature Climate Change 5 490 doi: 10.1038/nclimate2612
    Print ISSN: 1758-678X
    Digitale ISSN: 1758-6798
    Thema: Geologie und Paläontologie
    Publiziert von Springer Nature
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  • 9
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    The crustal structure of Ellesmere Island, Arctic Canada--teleseismic mapping across a remote intraplate orogenic belt (2016)
    Oxford University Press
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    Publikationsdatum: 2016-01-30
    Beschreibung: Ellesmere Island in Arctic Canada displays a complex geological evolution. The region was affected by two distinct orogenies, the Palaeozoic Ellesmerian orogeny (the Caledonian equivalent in Arctic Canada and Northern Greenland) and the Palaeogene Eurekan orogeny, related to the opening of Baffin Bay and the consequent convergence of the Greenland plate. The details of this complex evolution and the present-day deep structure are poorly constrained in this remote area and deep geophysical data are sparse. Receiver function analysis of seven temporary broad-band seismometers of the Ellesmere Island Lithosphere Experiment complemented by two permanent stations provides important data on the crustal velocity structure of Ellesmere Island. The crustal expression of the northernmost tectonic block of Ellesmere Island (~82°–83°N), Pearya, which was accreted during the Ellesmerian orogeny, is similar to that at the southernmost part, which is part of the Precambrian Laurentian (North America-Greenland) craton. Both segments have thick crystalline crust (~35–36 km) and comparable velocity–depth profiles. In contrast, crustal thickness in central Ellesmere Island decreases from ~24–30 km in the Eurekan fold and thrust belt (~79.7°–80.6°N) to ~16–20 km in the Hazen Stable Block (HSB; ~80.6°–81.4°N) and is covered by a thick succession of metasediments. A deep crustal root (~48 km) at ~79.6°N is interpreted as cratonic crust flexed beneath the Eurekan fold and thrust belt. The Carboniferous to Palaeogene sedimentary succession of the Sverdrup Basin is inferred to be up to 1–4 km thick, comparable to geologically-based estimates, near the western margin of the HSB.
    Schlagwort(e): Geodynamics and Tectonics
    Print ISSN: 0956-540X
    Digitale ISSN: 1365-246X
    Thema: Geologie und Paläontologie
    Publiziert von Oxford University Press im Namen von The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 10
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    Characterization of crustal structure by comparing reflectivity patterns of wide-angle and near vertical seismic data from the Parnaíba Basin, Brazil (2019)
    Oxford University Press
    Details
    Publikationsdatum: 2019
    Beschreibung: 〈span〉〈div〉SUMMARY〈/div〉Recently an ambitious experiment combining deep seismic surveys from near-vertical and wide-angle acquisition methods was carried out in Brazil. The seismic lines are essentially coincident and crossed the Parnaíba Basin from west to east near latitude 5°S. Here, the wide-angle reflection and refraction (WARR) and deep seismic reflection (DSR) results, which were previously interpreted independently, are compared by directly correlating WARR interfaces converted to TWTT with the major reflective horizons identified in the zero-offset image and by considering coincident reflectivity patterns displayed in both data sets. This integrated WARR and DSR analysis allowed a spatial association of the apparently acoustically featureless crust imaged in the DSR profile to the high reflectivity observed in the WARR data. Numerical tests and elastic modelling show that variations of the elastic properties of the crust, particularly as they are characterized by low 〈span〉Vp〈/span〉 and 〈span〉Vs〈/span〉 contrasts with a possible increase of the 〈span〉Vp〈/span〉/〈span〉Vs〈/span〉 ratio, can only weakly explain the observed reflectivity patterns but that fine-scale lithological heterogeneity within the crust is capable of replicating the observed contrasting seismic responses. The segment of the Parnaíba Basin crust that is characterized by fine-scale lithological heterogeneity lies directly above a mafic crustal underplate defined by the WARR model and was named as the Grajaú domain on the basis of WARR-derived velocity model. The applied methodologies allow added value to be taken from the independent seismic data sets and provide new information about crustal structure that may have important implications for overlying intracontinental basin evolution.〈/span〉
    Print ISSN: 2051-1965
    Digitale ISSN: 1365-246X
    Thema: Geologie und Paläontologie
    Publiziert von Oxford University Press im Namen von The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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