1,722,329 research outputs found
Frank G. Collins correspondence with the School Board, 1956 February 8
No full textLetter from an Atlanta, Georgia citizen to the Board of Education in Chattanooga, Tennessee in support of the board's decision to integrate the public schools. The author, Frank G. Collins, a self-proclaimed "white, Christian, American citizen" goes on to condemn the Chattanooga News Free Press's support of violence in opposition to integration in Chattanooga
Frank G. Collins correspondence with the School Board, 1956 February 8
No full textLetter from an Atlanta, Georgia citizen to the Board of Education in Chattanooga, Tennessee in support of the board's decision to integrate the public schools. The author, Frank G. Collins, a self-proclaimed "white, Christian, American citizen" goes on to condemn the Chattanooga News Free Press's support of violence in opposition to integration in Chattanooga
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
Petrogenesis of the Ghooshchi graniete by K- and Si- metasomatism of diorites and Gabbros, western Azerbaijan, Iran
Full text linkThe Ghooshchi granite has been intruded as an anorogenic, A-type, within-plate granite in an area northwest of Uromiyeh Lake in western Azerbaijan in northwestern Iran (Jahangiri, 1990). The Precambrian crystalline basement in this area is a metamorphic complex consisting of schists and gneisses that have been intruded by gabbros and diorites. Granitoids of the area are grouped into five suites according to their mineralogy, texture, and exposed features. Pink Ghooshchi granite, which is the largest mass, is characterized by granophyric and graphic textures. Myrmekite-bearing granitic masses, hereafter called leucometasomatites, occur either as apophyse-like bodies in the gabbro or as marginal parts of the Ghooshchi granite. Biotite granite occurs in the schists. Two-mica granite is found in the gneisses. And lensoidal granitic rocks are exposed in a phlogopite mine that contains abundant sphene, garnet, and calcite.Myrmekite and Metasomatic Granite 25. (1998)1526-575
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
Plate tectonics, the segmented Laramide Slab, deformation, and large scale K- and Si-metasomatism
Full text linkDeformation, caused by the down-going segmented Laramide Slab under southern California, created shear zones in the Sierra Nevada batholith, in the Mojave-Salinia arc segment, and in eastern California. In these shear zones, the plagioclase crystals in primary quartz diorite plutons were deformed and microfractured so that introduced K caused some of them to be replaced by K-feldspar. Broken mafic silicates were also replaced by quartz. As a consequence of the K- and Si-replacements, the quartz diorites in the shear zones were converted into metasomatic granodiorite, quartz monzonite, or granite. Myrmekite is a clue to the metasomatism. In other parts of the world where K is available and where primary mafic igneous rocks are sheared, K-metasomatism that produces K-feldspar and myrmekite can be expected.Myrmekite and Metasomatic Granite 50. (2004)1526-575
The lateral secretion origin of Fe and Zn ores, resulting from metasomatism and/or recrystallization of amphibolites and biotite-rich gneisses in New Jersey and New York, USA
No full textDuring K- and Si-metasomatism of deformed, relatively-mafic parent rocks to form more felsic, granitic rocks containing myrmekite, Ca, Mg, and Fe must leave the system as the modified rock is enriched in K, Na, and/or Si. When this kind of metasomatism occurs, the subtraction of Ca, Mg, and Fe would also be accompanied by losses of other metals present in the ferromagnesian silicates that were replaced by quartz. Such metallic elements could be deposited in adjacent rocks in ore concentrations by a process of lateral secretion. Such a process may explain the origin of Zn concentrations in New York
A study of intergrowth textures and their possible origins in the Alvand plutonic complex, Hamadan, Iran
Full text linkVarious types of intergrowth textures occur in the Alvand plutonic complex, Hamadan, Iran. Intergrowth textures, such as myrmekite, perthite, micrographic (± granophyric), and tourmaline-microcline intergrowth, are most common in this suite. Perthite and micrographic textures show characteristics of magmatic origin, but myrmekite and tourmaline-microcline intergrowth probably have metasomatic origin. In diorites, myrmekite was possibly generated by Ca-metasomatism, but in granodiorites and granites, it may have formed by both K- and Ca-metasomatism. The presence of anti-rapakivi texture (K-feldspar overgrowth on plagioclase) in the same rocks may be related to this process, too.Myrmekite and Metasomatic Granite 42. (2002)1526-575
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