118,162 research outputs found
Additive versus exklusive Zugehörigkeiten: Migrantenverbände zwischen nationalen und transnationalen Positionierungen
No full textRauer V. Additive versus exklusive Zugehörigkeiten: Migrantenverbände zwischen nationalen und transnationalen Positionierungen. In: Pries L, Sezgin Z, eds. Jenseits von "Identität oder Integration". Grenzen überspannende Migrantenorganisationen. Wiesbaden: VS; 2010: 67-92
Magnetotelluric investigation of the Vestfold Hills and Rauer Group, East Antarctica (time series)
No full textNAThis record was harvested by RDA at 2025-09-11T16:10:37.805841+10:00 from <a href='http://geonetwork.nci.org.au/geonetwork/srv/eng/catalog.search#/metadata/f2638_6708_6611_7301'>NCI's Data Catalogue</a> where it was last modified at 2019-06-04T12:06:15.The Vestfold Hills and Rauer Group in East Antarctica have contrasting Archean to Neoproterozoic geological histories and are believed to be juxtaposed along a suture zone that now lies beneath the Sørsdal Glacier. Exact location and age of this suture zone are unknown, as is its relationship to regional deformation associated with the amalgamation of East Gondwana. To image the suture zone, magnetotelluric (MT) data were collected in Prydz Bay, East Antarctica, mainly along a profile crossing the Sørsdal Glacier and regions inland of the Vestfold Hills and Rauer Group islands. 

MT data were collected by a team from University of Adelaide with support from the Australian Antarctic Division (AAD) in the austral summer of 2008/2009. Thirty four stations were collected along three transects totaling approximately 200 line kilometers, with station spacing varying between 2.5 and 20 km . Instrumentation consisted of six AuScope MT systems using Numeric Resources preamplifiers to overcome the high contact impedance of ice. Magnetic data were variably collected using three-component fluxgate, and two-component (both horizontal) and three-component (two horizontal and one vertical) induction coil magnetometers. Stainless steel plates were used for electrodes (with the face placed horizon- tally in snow or ice) along 100 m dipoles setup in an L-shape. Data were collected for an average of 5 days at a sampling rate of 100 samples/s. All stations where aligned with geomagnetic north (81 degrees west of geographic north). The field team was stationed at the AAD’s Davis Station and transported between stations via helicopter
Adélie penguin occupancy survey of the Rauer Group, 2009
No full textProgress Code: completedOccupancy surveys in November 2008 (Southwell and Emmerson 2013) found a total of 13 Adélie penguin breeding sites in the Rauer Group. The boundaries of breeding sub-colonies at 12 of these sites were subsequently mapped from vertical aerial photographs taken for abundance surveys on 21-23 November 2009 (for details of aerial photography see Southwell et al. 2013). The boundaries were mapped with a buffer distance of approximately 1-3 m from the perimeter of penguin sub-colonies.<br/><br/>Please refer to the Seabird Conservation Team Data Sharing Policy for use, acknowledgement and availability of data prior to downloading data
Adélie penguin occupancy survey of the Rauer Group, 2010
No full textProgress Code: completedOccupancy surveys in November 2008 (Southwell and Emmerson 2013) found a total of 13 Adélie penguin breeding sites in the Rauer Group. The boundaries of breeding sub-colonies at 12 of these sites were subsequently mapped from vertical aerial photographs taken for abundance surveys on 21-23 November 2009. The remaining breeding site (IS_72922) was photographed obliquely from a helicopter using a hand-held camera on 20 December 2010. Colony boundaries for this site were drawn and digitised by eye.<br/><br/>Please refer to the Seabird Conservation Team Data Sharing Policy for use, acknowledgement and availability of data prior to downloading data
New constraints on metamorphism in the Rauer Group, Prydz Bay, east Antarctica
No full textGranulite facies metapelites of the Mather and Filla Paragneisses within the Rauer Group, east Antarctica, possess markedly different compositions. The metamorphic evolution of the two metapelite types has been interpreted as temporally distinct, with the Rauer Group preserving at least two distinct granulite facies tectonothermal episodes. Calculated P–T pseudosections and orthopyroxene Al content indicate the revised maximum-preserved P–T conditions within the Mather Paragneiss to lie in the vicinity of 950–975 °C and 10–10.6 kbar, less extreme than previous estimates. The range of possible P–T paths for the Mather Paragneiss consistent with mineral textural relationships and pseudosections contoured for mineral proportion are significantly shallower (dP/dT) than previous estimates. A near-isothermal decompression P–T path, and extreme peak metamorphic conditions, are not necessary to explain the development of preserved mineral reaction textures. The Filla Paragneiss contains pelitic assemblages less amenable to rigorous quantitative analysis. Nevertheless, possibilities for the shared or otherwise metamorphic evolution of the Mather and Filla Paragneisses may be postulated on the basis of calculated pseudosections in the context of existing geochronology for the Rauer Group and preserved microstructures. A shared evolution, most likely during Pan-African granulite facies metamorphism, is plausible and consistent with mineral assemblage development, geochronology and microstructures. A revised interpretation of the Rauer Group's preserved metamorphic evolution may warrant the revision of existing tectonic models, applicable also to the remainder of Prydz Bay. More generally, the employed approach may incite a revision of peak P–T and P–T paths in other granulite facies terranes.D. E. Kelsey, R. W. White, R. Powell, C. J. L. Wilson and C. D. Quin
(Th+U)-Pb monazite ages from Al-Mg-rich metapelites, Rauer Group, east Antarctica
No full textThe age of high-temperature granulite-facies metamorphism (>~800–850 °C) in the Rauer Group, Prydz Bay, east Antarctica, is relevant for establishing the metamorphic and temporal architecture of the Prydz Bay mobile belt. Monazites within Al-Mg-rich granulite-facies metapelites give an overall tanh-estimated Pan-African age of ~511±4 Ma (2) using in-situ electron microprobe-based (Th+U)-Pb chronology, consistent with existing U-Pb zircon geochronology from the Rauer Group and Prydz Bay. Monazite occurs primarily within cordierite-bearing coronae and symplectic mineral reaction textures, and also within biotite. Pan-African granulite-facies metamorphism is preferred as responsible for the development of the cordierite-bearing microstructures, and probably (peak) coarse-grained assemblages, constrained using an integrated geologic, geochronologic and metamorphic framework. Thus, Pan-African granulite-facies metamorphism affected the Rauer Group, within the Prydz Bay mobile belt. Moreover, integrated monazite geochronology may be used to decipher the temporal metamorphic histories of potentially complex high-temperature terrains.D. E. Kelsey, R. Powell, C. J. L. Wilson and D. A. Steel
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Letter from unknown writer to Jesse L. Boyce
No full textLetter to Jesse L. Boyce from unknown author (possibly Jack) about the investigation into the powder magazine located in the Grand Canyon. Some personal news is included in the letter such as the writer's marriage to the daughter of C.A. Taylor, former Supervisor of Cochise County
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