1,720,958 research outputs found
Crystal structure of Au-pseudocarbyne(C6)
Full text linkCarbyne-related materials permit exploring the potentially extraordinary properties of this long-sought but still elusive carbon allotrope. However, accurate understanding of these materials is challenging. Here we report the crystal structure of a Au-pseudocarbyne, a representative of a possible new family of materials consisting of sp-hybridized carbon chains and stabilizing metal atoms. Au-pseudocarbyne(C6), the representative pseudocarbyne containing six-membered carbon chains, has space group P6/mmm191 and unit-cell parameters a = b = 0.60 nm, c = 0.896 nm, α = β = 90°, γ = 120°. Its long-range structure can be understood as intimately intergrown bundles, each consisting of six parallel, infinite carbon chains surrounding a column of gold atoms. This compound, together with its eight-membered counterpart Au-pseudocarbyne(C8), shows that interesting new materials resembling the carbyne structure and sharing some of its properties can be designed and developed. The current work raises serious questions regarding recent reports of carbyne synthesis
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
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
Public Pensions, Private Transfers, and Subjective Well-Being: A Focus on the Role of Income Instability Reduction
No full text공적연금제도의 목표가 안정적인 소득보장을 통한 수급자의 경제적 생활안정과 복리증진에 있 다는 점에도 불구하고, 그 동안 공적연금제도의 효과는 빈곤완화와 소득재분배 측면에 집중되어 왔다. 이에 본 연구는 공적연금제도가 갖고 있는 소득안정화 기능에 초점을 두고, 우리나라 노인가구들이 경험하고 있는 공적연금소득과 사적이전소득의 소득불안정성(income instability) 완화 기능을 분석하였으며, 양자의 기능이 노년층의 후생(삶의 만족도)에 미치는 영향을 분석하였다. 분석결과 우리나라 노인가구의 소득불안정성을 가장 많이 완화하는 소득원천은 사적이전소득이었으나, 공적연금을 수급하는 가구들로 한정하는 경우 공적연금소득의 역할이 더 큰 것으로 나타났다. 또한 노인들이 경험하고 있는 소득불안정성은 노인들의 삶의 만족도에 부정적인 영향을 미치고 있었으며, 사적이전과 공적연금의 역할은 차별적인 것으로 나타났다. 즉, 공적연금의 소득안정화기능은 삶의 만족도에 긍정적인 역할을 하는 반면, 사적이전소득의 소득안정화기능은 노인들의 삶의 만족도에 큰 영향을 미치지 못하고 있었다. 이를 통해 공적연금제도가 갖고 있는 소득안정화 기능, 그리고 이를 통한 차별적인 심리적 편익의 존재를 확인할 수 있었다.Various studies about the public pension system has focused on poverty reduction and the income redistribution effect even though the public pension system aims at improving well-being and ensuring economic security for the elderly by providing ongoing pension payments. Instead, this study analyzes the role of public pension income, together with private transfer income, on the reduction of elderly household income insecurity, and investigates the impact of the reduction in insecurity on the subjective well-being of the elderly. The results show that, first, private transfer income lowers the income insecurity of the elderly most, but public pension income lowers income insecurity more when the elderly receive a pension payment. Second, income insecurity of the elderly has a negative impact on their life satisfaction but there are noticeable differentials. The impact of private transfer income on reducing income insecurity does not have a significant impact on the life satisfaction of the elderly while the impact of public pension income has a positive impact on life satisfaction. This work underscores the public pension role in securing income grounded on this evidence and emphasizes the psychological benefits of public pension income to the elderly
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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