1,720,960 research outputs found
Geologic map of Minnesota, St. Paul sheet, bedrock geology.
No full textMap Scale 1:250,000Sloan, R.E.; Austin, G.S.. (1970). Geologic map of Minnesota, St. Paul sheet, bedrock geology.. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/61609
Guidebook 4. Field Trip Guide Book for Paleozoic and Mesozoic Rocks of Southeastern Minnesota
No full textPrepared for the 85th Annual Meeting of THE GEOLOGICAL SOCIETY OF AMERICA and ASSOCIATED SOCIETIES Minneapolis, Minnesota, 1972, 81 p.
SPECIAL PAPERS: Austin, G.S., Paleozoic lithostratigraphy of
southeastern Minnesota; Webers, G.F., Paleoecology of the
Ordovician strata of southeastern Minnesota; Sloan, R.E., Notes on
the Platteville Formation, southeastern Minnesota; and Austin, G.S.,
Precambrian quartzite and Cretaceous rocks of southern Minnesota.The Paleozoic rocks of southeastern Minnesota (fig. 1) were deposited from a marine sea which occupied the Hollandale Embayment (fig. 2), a shallow depression that extended northward from the Ancestral Forest City Basin (Iowa Basin) onto the cratonic shelf and into Minnesota and Wisconsin in Early and Middle Paleozoic time. The rocks that now remain within the embayment in Minnesota are bordered to the east by nearshore-facies Paleozoic rocks on the Wisconsin Arch, to the northeast by Precambrian rocks that constitute the Wisconsin Dome, and to the north and west by nearshore-facies Paleozoic rocks lying near the margins of the Hollandale Embayment and the Precambrian rocks of the Transcontinental Arch. The embayment overlies older basins and horsts that are bounded by largescale Precambrian faults (Sims and Zietz, 1967). Many smaller Paleozoic basins, depositional barriers, and faults within the embayment probably have resulted from relatively minor recurrent movements along Precambrian faults during Paleozoic time (Craddock and others, 1963).Webers, G.F.; Austin, G.S.. (1972). Guidebook 4. Field Trip Guide Book for Paleozoic and Mesozoic Rocks of Southeastern Minnesota. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/58567
RI-01 Geological Interpretation of Magnetic Map of McLeod County, Minnesota
No full textA ground magnetometer survey of McLeod County, Minnesota
has delineated 3 structural blocks in the buried Precambrian
basement rocks. The sources of the anomalies in each of the
blocks have not been identified definitely because of a lack of
subsurface data, but are interpreted qualitatively from an analysis
of the anomalies and considerations of the regional geology.
An anomaly in the northwestern part of the county, near
Hutchinson, is interpreted to represent a folded, magnetic rock
unit. Probably this unit is a magnetite-bearing schist, but the
possibility of its being an iron-formation of the Cuyuna-type
should be investigated further.Sims, P.K.; Austin, G.S.. (1963). RI-01 Geological Interpretation of Magnetic Map of McLeod County, Minnesota. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/59881
RI-04 Interpretation of Lake Washington Magnetic Anomaly, Meeker County, Minnesota
No full textA magnetic anomaly centered at Lake Washington, in
southeastern Meeker County, has been outlined by a ground
magnetometer survey. The anomaly is arcuate in outline,
about 8.5 miles long and a maximum of 5 miles wide, and
has a maximum amplitude greater than 3,000 gammas. A
gravity traverse was made across the anomaly to aid in interpretation.
Combined magnetic and gravity data are interpreted to
indicate that the source is a basin-shaped body having a substantially
greater density than the adjacent rocks that lies at
a shallow depth. The lithology of the source is not known
because of a lack of subsurface data, but is inferred to be
either Precambrian iron-formation or mafic igneous rock.
The anomaly warrants further investigation.Sims, P.K.; Austin, G.S.; Ikola, Rodney J.. (1964). RI-04 Interpretation of Lake Washington Magnetic Anomaly, Meeker County, Minnesota. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/60188
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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