1,721,059 research outputs found
Yamamoto (Naoko-san) [Naoko Yamamoto] and I [Seiko Ishida]
No full textPortrait of Seiko Ishida and Naoko Yamamoto. Caption beneath photograph in album reads, "Miss Yamamoto (Naoko-san) and I. May 1936, Tokuyama." Photograph from "Seiko Ishida's photo album" (csufu_sc_0364), page 19.The Japanese American Relocation Collection is composed of ephemera related to the relocation program during World War II. Items include the official government report of Manzanar Relocation Center, a photo album, post-war activism materials related to preserving and remembering the camps, various clippings, and documents. The strength of this collection is found in its many perspectives on the controversial relocation program and how it has been presented since World War II
An MC-SCF/MP2 Study of the Photochemistry of 2,3-Diazabicyclo[2.2.1]hept-2-ene: Production and Fate of Diazenyl and Hydrazonyl Biradicals
No full textA CAS-SCF/MP2 study of the photolysis of 2,3-diazabicyclo[2.2.1]hept-2-ene (DBH) has been carried out with use of a 6-31G* basis. The S1 (n-π*), T1 (n-π*), and T2 (π-π*) reaction paths for deazetization (via α C-N cleavage) and rearrangement reaction to azirane (via β C-C cleavage) have been investigated along with the associated reaction pathways for cyclization and rearrangement of the photoproduct, 1,3-cyclopentanediyl biradical. It is shown that singlet and triplet photoexcited DBH evolve along a network of 18 ground and excited-state intermediates, 17 transition structures and 10 'funnels', when internal conversion (IC) or intersystem crossing (ISC) occurs. Three cyclic excited-state species are reached following evolution from the Franck-Condon region: two metastable singlet (n-π*) and triplet (n-π*) species and a stable excited state 3(n-π*)-3(π-π*) intermediate. It is demonstrated that the singlet 1(n-π*) intermediate can decay directly to S0 or undergo ISC to generate the 3(n-π*)-3(π-π*) intermediate or/and the 3(n-π*) intermediate. The 3(n-π*) intermediate can directly decay to the T1 diazenyl biradical or undergo IC to generate the 3(n-π*)-3(π-π*) intermediate. Finally, the much more stable 3(n-π*)-3(π-π*) intermediate cannot be converted to the other excited state intermediates but can only react via either α C-N and β C-C cleavage. Our computed energetics suggest that the 3(n-π*)-3(π-π*) intermediate is the best candidate for the experimentally observed transient triplet intermediate
Modeling Photochemical [4 + 4] Cycloadditions: Conical Intersections Located with CASSCF for Butadiene + Butadiene
No full textThe [4 + 4] photocycloaddition of butadiene + butadiene has been studied at the CASSCF/4-31G level, as a prototype for a class of photochromic systems. For this model system, minima and transition structures are characterized by analytic frequency calculations, and conical intersections are located. Our results indicate that the standard model for the [4 + 4] addition (based on H 4) needs to be revised. The reorganization of all 8π electrons is crucial (i.e., it is not always the same 4π electrons that are important). Efficient nonradiative decay of butadiene + butadiene can be explained by the presence of two distinct S 1/S 0 conical intersections. The first - the lowest energy point on S 1 overall - is preceded by a barrier for the formation of a new σ bond. The resulting structure is similar to those previously characterized for methyl migration in but-1-ene and the addition of ethylene to benzene. A higher-energy barrier leads to a second crossing which resembles the rhomboidal funnel for the [2 + 2] addition of ethylene + ethylene, but which involves only one double bond from each butadiene. Both reaction paths commence at a true pericyclic minimum, at which the (S 0-S 1) energy gap of ~37 kcal mol -1 prohibits decay
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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