1,720,955 research outputs found
Domain theory in situ To spaces
No full textIn this thesis, domain theory in the realm of T₀ spaces is studied. Our work is motivated mainly by recent theorems which ‘lift’ classical domain-theoretic results from the posetal setting to the realm of T₀ spaces. Some of such theorems were reported in a 2015 paper by Zhao and Ho, entitled ‘On topologies defined by irreducible sets’. Our first main focus is the Zhao-Ho replacement principle which concerns the replacement of directed subsets of posets by irreducible subsets of T₀ spaces. In Chapter 4, this replacement is applied to yield the definitions of Irr-convergence class and Irr-continuous spaces. Herein, we unearth some relations between Irr- convergence class, Irr-continuous spaces, and two novel types of T₀ spaces, i.e., balanced spaces and nice spaces. In Chapter 5, we revisit the aforementioned paper by Zhao and Ho, and specifically look into some gaps which were left unaddressed by them. We fill in the gaps by: (1) re-examining the Zhao-Ho replacement principle, and then intro- ducing SI-convergence class that induces the SI-topology, (2) defining the notion of SI∗-continuous spaces, and then crucially proving SI- and SI∗-continuities are one and the same notion. In Chapter 6, we re-work the main results reported in both Zhao and Ho’s 2015 paper and those results reported in Chapter 5 in very much the same spirit as Erne’s work on s₂-continuous posets and s₂-convergence class in which he generalised continuous posets and Scott convergence class. To do this, we define the notions of SI₂-topology, δ-sobriety, SI₂-continuous spaces, and SI₂-convergence class, and then prove some results related to these four new notions. As the Zhao-Ho replacement is put in the limelight of our exposition in Chapter 4, we were not particularly successful in obtaining a complete characterisation of spaces in which the Irr-convergence is topological – which is a problem. In Chapter 7, we intentionally move away from our obsession of applying just the Zhao-Ho replacement principle, and instead open up the horizon by working with more general convergence classes. With this intentional deviation, we manage to locate a complete characterisation of those spaces in which such a general convergence class is topological. We then apply this characterisation to the special case of Irr-convergence class, and solve the aforementioned problem. Also in the same chapter, we generalise the order-convergence class in posets and establish a characterisation of posets in which the generalised order-convergence class is topological. An immediate consequence of our new characterisation is the recovery of a recent result by Sun and Li, where they obtained some neces- sary and sufficient condition for posets in which the order-convergence class is topological. In our last chapter, Chapter 8, we define some endofunctors on the category of T₀ spaces. Our work here is motivated by theory in posets. We tailor make a version of theory suited for T₀ spaces. Crucially, this theoretical development leads to some interesting KZ-monads and KZ-comonads, which in turn allow us to give characterisations of F-injective (resp., E-projective) T₀ spaces, where F (resp., E) is determined by a certain monad (resp., comonad)
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
Strong completions of spaces
No full textThis is an unpublished manuscript archived in Arxiv, available online at https://arxiv.org/pdf/1607.04162.pdfA non-empty subset of a topological space is irreducible if whenever it is covered by the union of two closed sets, then already it is covered by one of them. Irreducible sets occur in proliferation: (1) every singleton set is irreducible, (2) directed subsets (which of fundamental status in domain theory) of a poset are exactly its Alexandroff irreducible sets, (3) directed subsets (with respect to the specialization order) of a T0 space are always irreducible, and (4) the topological closure of every irreducible set is again irreducible. In recent years, the usefulness of irreducible sets in domain theory and non-Hausdorff topology has expanded. Notably, Zhao and Ho (2009) developed the core of domain theory directly in the context of T0 spaces by choosing the irreducible sets as the topological substitute for directed sets. Just as the existence of suprema of directed subsets is featured prominently in domain theory (and hence the notion of a dcpo – a poset in which all directed suprema exist), so too is that of irreducible subsets in the topological domain theory developed by Zhao and Ho. The topological counterpart of a dcpo is thus this: A T0 space is said to be strongly complete if the suprema of all irreducible subsets exist. In this paper, we show that the category, scTop+, of strongly complete To spaces forms a reflective subcategory of a certain lluf subcategory, Top+, of To spaces
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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