1,722,489 research outputs found
전기화학적 산소발생반응 적용 니켈 기반 코어-쉘 촉매의 탄소 복합체로 구성된 접촉면 모델링에 관한 연구
No full textDensity Functional Theory(DFT) study, Computational Chemistry, Core-shell catalyst, Electrochemical water splitting, Oxygen Evolution Reaction(OER), Surface reaction, Single atom catalysts(SACs)NⅠ. Introduction 1
1.1 Hydrogen production technology 1
1.2 Nickel based electrode for electrochemical catalyst 5
1.3 Carbon shell-based core-shell catalyst for electrochemical 11
1.4 Active site core-shell catalyst 14
1.4.1 Core-metal surface 15
1.4.2 Carbon-shell surface 17
1.4.3 Interfacial region 19
1.5 Research motivation & objective 22
II. Research method 24
2.1 Theoretical method 24
2.1.1 Basic concept 24
2.1.2 Born-Oppenheimer approximation 24
2.1.3 Many-body problem wavefunction 25
2.1.4 Density function Theory (DFT) 25
2.1.4.1 Hohenberg-Kohn theorem, Kohn-Sham Equation 26
2.1.4.2 Exchange-correlation functional 28
2.1.4.3 Basis set -plane waves 30
2.1.4.4 Pseudopotential 31
2.1.4.5 Geometry optimization 33
2.2 Calculation model 34
2.2.1 Experimental based calculation model analysis 34
2.2.2 Initial calculation model definition 48
III. Research result 51
3.1 OER intermediate adsorption model on clean Ni surface 51
3.2 Core based OER and oxidation mechanism 53
3.3 Core metal oxide model validation 63
3.4 SAC interface based OER mechanism 67
3.5 Free energy correction for OER 72
IV. Discussion 75
4.1 Discussion 75DoctordCollectio
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
Factor shares at the sector level, Colombia 1990-2005
Get PDFIn general, empirical studies on economics rely on the assumption of constant capitalshare of income both at the aggregate level and at the sector level. However, there is noempirical evidence supporting the constancy of capital share at the sector level. In thispaper, using Colombian data, we measure capital share for 48 sectors during the period1990-2005. We also explore the relation between capital's share and factor prices andthe behavior of capital share during the business cycle. The main results are thefollowing: (i) capital share is not constant but, rather, has an increasing trend; (ii) capitalshares growth rates positively correlate with sector value-added growth; (iii) the capitalshares behave pro-cyclically; and (iv) there is a positive correlation between capitalshares and real wages and a negative correlation between capital shares and interestrates. These results suggest that the usual assumption of constant factor shares is notaccurate.Factor Shares, income distribution, cycles, economic growth, Colombia
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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