1,722,244 research outputs found
Gemmological Characteristics of the “Jin Gao Yu” from Shangluo City, Qinling Mountains, Shaanxi Province, China
No full textIn recent years, “Jin Gao Yu” that has been traded as a kind of jade has appeared in areas of the Luonan and Shangnan counties, Shangluo City, Shaanxi Province, attracting the attention of scholars and consumers for its delicate texture and warm color. In this study, infrared spectroscopy, Raman spectroscopy, X-ray diffraction analysis, and electron microprobe analysis were used to conduct a systematic gemmological test and an analysis of “Jin Gao Yu”. The results show that “Jin Gao Yu” is a compact mineral aggregate dominated by dolomite, which contains quartz mineral inclusions. The color of “Jin Gao Yu” is grayish-white to earthy-yellow, the refractive index is about 1.54, and the relative density is about 2.86. Its crystal structure is basically the same as that of dolomite, both of which are trigonal systems with granular crystalloblastic textures. It has good crystallinity. The recrystallization phenomenon can be seen under a polarizing microscope. This study determined the species of “Jin Gao Yu”, improved its gemological basic data, provided a theoretical basis for the identification of “Jin Gao Yu” in the future, and, also, provided a new direction for the use of dolomite
Constraining accelerating cosmologies with distance measurement
No full textGao, Yu. (2012). Constraining accelerating cosmologies with distance measurement. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/129754
The Effect of Continental Ice Sheets on ITCZ shifts during the LGM
No full textSimulations: CTL, Remove_topography, Remove_albedo, Remove_icesheet. Variables: [in Fig.1] PRECT; [in Fig 2] itczind1, itczind2, itczind3; [in Fig.3] MPSI; [in Fig.4] SST, ICEFRAC; [in Fig.5] Vbot
Replication Data for: Dynamic Effect of Last Glacial Maximum Ice Sheet Topography on East Asian Summer Monsoon
No full textSimulations: 100%, 0%, 100L+100E, 0L+0E, 100L+0E, 0L+100E, 100L+100E_AGCM, 0L+0E_AGCM. Ref: Gao Y, Liu Z, Lu Z, 2020, Dynamic Effect of Last Glacial Maximum Ice Sheet Topography on East Asian Summer Monsoon, Journal of Climate. For any question, please contact: [email protected]
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
An experimental test of reduction invariance
Full text linkPrelec's (1998) compound-invariant family provides an appealing way to model probability weighting and is widely used in empirical studies. Prelec (1998) gave a behavioral foundation for this function, but, as pointed out by Luce (2001), Prelec's condition is hard to test empirically. Luce proposed a simpler condition, reduction invariance, to characterize Prelec's weighting function that is easier to test empirically. Luce pointed out that testing this condition is an important open empirical problem. This paper follows up on Luce's suggestion and performs an experimental test of reduction invariance. Our data support reduction invariance both at the aggregate level and at the individual level where reduction invariance was the dominant pattern. A special case of reduction invariance is reduction of compound gambles, which is often considered rational and which characterizes the power weighting function. Reduction of compound gambles was rejected at the aggregate level even though 60% of our subjects behaved in line with it
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