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The art of building dynamic systems models
No full textIn this chapter we aim to provide the reader with guidelines to build one's own quantitative dynamic systems model. To be able to build such a model, two types of knowledge are important. The first type concerns the knowledge of how to translate theoretical notions into a conceptual dynamic systems model, and how to translate that conceptual model into quantitative expressions. The chapter will focus on this first type of knowledge. The second type of knowledge concerns the technical part - knowledge about which software to use, the type of equations that represent different types of development, etc. In addition, knowledge is needed about how to enter quantitative mathematical expressions in a spreadsheet, how to generate simulations and how to make graphs. In our examples and explanations we use spreadsheets, because our aim is to make the art of model building available for all colleagues, not only for those highly skilled in computer programs and mathematics. Spreadsheet programs have proved to be very useful for building dynamic systems, and most people have these programs. So, in this chapter we will describe the process from general theories to a quantitative dynamic systems model. We will do that by means of an example: the building of a model of commitment development. The chapter will describe the modeling process in different steps.</p
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Cities, networks, polycentrism – examining the place of polycentrism in spaces of flows
Full text linkIn a globalising world economy, cities have increasingly come to be defined not by their size in terms of built up area or population but by their functions in the networks constructed by cross-territorial capital flows. In contemporary inter-city networks, city regions are differentiated not only by their physical pattern of urban development but also by their functional pattern in network space. However, the concept of city region ‘polycentrism’ has commonly referred to morphological space without paying due regard to network space, functions and flows. This paper dissects the concept of polycentrism by examining interrelationships and distinctions between city region network and morphological space development in mature and developing economy contexts with reference to research conducted in South East England and in the Mid-Yangtze River region, China. It is concluded that a more progressive definition of polycentrism is needed to inform coordinated strategic city region policy
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
Defying disappearance: cosmopolitan public spaces in Hong Kong
No full textQuestions of the use of public space take place not only in the parks, plazas, and sidewalks of Western cities, but in cities around the world. In this selection, Lisa Law examines how local residents use certain central and significant public plazas in Hong Kong. Many recent immigrants, especially female domestic workers, like to use a central downtown area, known as Statue Square, to gather and socialize on Sundays. But the authorities have begun to resist these efforts, and to make it difficult for the women to engage in such gatherings. Law argues that there will be growing pressure on local authorities to make these kinds of spaces available to people, as major metropolitan areas like Hong Kong become the favored destination of immigrants
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
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