1,720,977 research outputs found
Erfahrung des Atmosphärischen im geschützten Raum. Anmerkungen zu einer neuphänomenologisch-pathischen Ästhetik
No full text
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
Modelling of flow and settling in storm water sedimentation tanks
No full textIn the near future in the Netherlands many reservoirs will have to be built to abate the pollution of the surface water by overflowing storm water from combined sewer systems [Kluck, 1992-a]. These reservoirs, called storm water sedimentation tanks, reduce the pollution in two ways. The most important is by simply storing a part of the sewage (waste water and storm water) and thus reducing the quantity of overflowing water. The second is by providing flow conditions in which particles can settle, so that the overflowing water is less polluted. There are no satisfactory design methods - taking into account the time-varying inflow - for this kind of structures. The aim of the study is to develop design methods for these tanks such that the overall efficiency of the tanks will be optimal. A mathematical model (PHOENICS package) is used to describe the flow and settling in the reservoirs. By using the time-dependent, 2-DV or 3-D mathematical model the effect of changes in lay-out for various shapes of reservoirs can be investigated under variable flows. The course of this study has been defined as follows: First a mathematical model in which only the water flow is considered will be set up. Computational results will be compared with measurements on a scale model. The flow model will be calibrated with these measurements. Next the particle movement will be modelled. Computations will be compared with experimental data and the model will be calibrated. With the validated model different designs of tanks will be judged and optimal working tanks will be designed. The work done in the period February 1992 to July 1993 is presented in four reports [Kluck, 1992-a, 1992-b, 1993-a and 1993-b] (written in Dutch). The first report presents the objectives of the research and the present design methods for storm water sedimentation tanks. In the second report the choice for using PHOENICS to set up a mathematical model has been made. Also a start has been made with setting up a model for water movement only. The next report deals with the problems encountered in modelling a varying free-surface flow. Finally in the fourth report further progress in modelling the water flow is presented. In the future the most important parts of these reports will be translated into English. The present report describes the progress which has been made from July 1993 until July 1994. In chapter 2 a brief description of the flow model is given. Chapter 3 presents the experimental setup in which measurements were carried out. In Chapter 4 the measured data are presented, together with a comparison with computations and analysis. The work done so far to simulate the sedimentation is presented in chapter 5. Finally in chapter 6 the continuation of this research is described.Water ManagementCivil Engineering and Geoscience
Onderzoek aan bergbezinktanks: Stand van zaken: Tussenrapport 1 van het Rionedproject 92-05 "Onderzoek bergbezinktanks"
No full textWater ManagementCivil Engineering and Geoscience
Een mathematisch model voor het hydraulische gedrag van bergbezinktanks: Tussenrapport 2 van het Rionedproject 92-05 "Onderzoek bergbezinktanks"
No full textWater ManagementCivil Engineering and Geoscience
The Design of Optimally Functioning Storm Water Settling Tanks
No full textCivil Engineering and Geoscience
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
- …
