1,721,004 research outputs found
Using PVS to Prove Properties of Systems Modelled in a Synchronous Dataflow Language
No full textAssociated research group: Critical Systems Research GroupWe report on our experience with using the PVS theorem prover as a verification tool for analyzing systems modelled in RSML-e - a synchronous dataflow language. RSML-e is a formal specification language particularly well-suited for specifying requirements of reactive systems. We advocate a specification-centered approach to system development, in which various development activities like prototyping, analysis, verification, testing, and code-generation are based on a formal model of the system requirements. To support the analysis and verification activities, we developed a translator from RSML-e to PVS as part of our toolset. We used these tools to successfully verify properties of the mode logic of a flight-guidance system specified in RSML-e by our industrial partner, Rockwell Collins Inc. The results from this exercise are encouraging. This paper describes our approach to formalizing RSML-e in PVS and discusses briefly the strategies adopted in proving properties as well as some experiences.Rayadurgam, Sanjai; Joshi, Anjali; Heimdahl, Mats. (2003). Using PVS to Prove Properties of Systems Modelled in a Synchronous Dataflow Language. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/217335
FGS Partitioning Final Report
No full textPartitioning a system consists of dividing it into components that can be physically isolated from each other while preserving the essential behavior of the system. In this report, we describe a methodology for developing and reasoning about such systems. This approach allows a developer to start from an ideal system specification and refine it along two axes. Along one axis, the system can be refined one component at a time toward an implementation. Along the other axis, the behavior of the system can be relaxed to produce a more cost effective but still acceptable solution. We illustrate this process by applying it to the synchronization logic of a Dual Fight Guidance System, evolving the system from an ideal case in which the components do not fail and communicate synchronously to one in which the components can fail and communicate asynchronously. For each step, we show how the system requirements have to change if the system is be implemented and prove that each implementation meets the revised system requirements through model-checking.Miller, Steven P.; O'Brien, Dan; Heimdahl, Mats; Joshi, Anjali. (2005). FGS Partitioning Final Report. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/215680
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
Supplemental Material, sj-pdf-1-her-10.1177_19375867211062268 - Perceived Usability of Seating in an Outpatient Waiting Area: A Combined Approach Utilizing Virtual Reality and Actual Seating Prototypes
No full textSupplemental Material, sj-pdf-1-her-10.1177_19375867211062268 for Perceived Usability of Seating in an Outpatient Waiting Area: A Combined Approach Utilizing Virtual Reality and Actual Seating Prototypes by Roxana Jafarifiroozabadi, Rutali Joshi, Anjali Joseph and Deborah Wingler in HERD: Health Environments Research & Design Journal</p
Supplemental Material, sj-pdf-1-her-10.1177_19375867211001379 - Emergency Physicians’ Workstation Design: An Observational Study of Interruptions and Perception of Collaboration During Shift-End Handoffs
No full textSupplemental Material, sj-pdf-1-her-10.1177_19375867211001379 for Emergency Physicians’ Workstation Design: An Observational Study of Interruptions and Perception of Collaboration During Shift-End Handoffs by Rutali Joshi, Anjali Joseph, Michelle Ossmann, Kevin Taaffe, Ronald Pirrallo, David Allison and Larissa Coldebella Perino in HERD: Health Environments Research & Design Journal</p
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
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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