1,721,052 research outputs found
Two Methods For Exploiting Abstraction In Systems
No full textION IN SYSTEMS Paul A. Fishwick and Kangsun Lee Computer and Information Science and Engineering Department University of Florida Gainesville, FL 32601 Abstract As complex models are used in practice, modelers require ways of abstracting their models and having the ability to traverse levels of abstraction. The use of abstraction in modeling is spread over many disciplines and it is often difficult to locate an abstraction methodology or a set of practical techniques to help the modeler to perform the abstraction. Several approaches have been discussed in the general simulation literature: (1) variable resolution modeling; (2) combined modeling; (3) multimodeling; and (4) metamodeling. Our premise is that there are two different approaches to abstraction: behavioral and structural. We present one physical example of heat transfer and display the different abstraction approaches on this example. The approach taken to abstraction is an important design approach---to break a system into..
Dynamic Model Abstraction
No full textION Kangsun Lee Paul A. Fishwick Department of Computer and Information Science and Engineering University of Florida Bldg. CSE, Room 301 Gainesville, FL 32611 ABSTRACT While complex behavior can be generated through simple systems, as in chaotic and nonlinear systems, complex systems are found where a systems study contains multiple physical objects and interactions. Through the use of hierarchy, we are able to simplify and organize the complex system. Every level within the hierarchy may be refined into another level. System abstraction involves simplification through structural system representation as well as through behavioral approximations of executed model structure. There has been little work on creating a unified taxonomy for model abstraction. We present such a taxonomy and define two major sub-fields of model abstraction, while illustrating both sub-fields through detailed examples. The introduction of this taxonomy provides system and simulation researchers with a way in ..
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
The Design of a Human Computer Interface for a Multimodeling Object Oriented Simulation Environment
No full textMOOSE (Multimodeling Object Oriented Simulation Environment) is an application framework under the development at University of Florida, which is used for modeling and simulation. MOOSE is based on Object Oriented Physical Modeling (OOPM), and consists of a Human Computer Interface (HCI), Translator, and Engine. A human model author builds the model of a physical system with the help of Graphical User Interface (GUI) and represents his/her model with a picture. The MOOSE GUI contains two types of modelers: conceptual and dynamic. The conceptual modeler supports a model author to define classes and relations among classes in a form of class hierarchy that represents the conceptual model. The dynamic modeler assists a model author to build dynamic models for each of the classes defined in the conceptual model. The dynamic model types supported are Functional Block Model, Finite State Model, Equation Model , System Dynamics Model, and Rule Based Model. We are currently performing research..
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
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