1,720,980 research outputs found
Chapter 5: RetroGuide Evaluation
Get PDFjournal articleThis chapter presents a RetroGuide (RG) evaluation study which was conducted to assess the flowchart-based modeling approach. This study complements the previously presented case studies in an overall effort to evaluate the RG project. The evaluation was targeted at informatics users with small to moderate analytical experience. Due to RG\u27s key developmental goal to lower the technological barriers for novice users to analyze data stored in an Enterprise Data Warehouse (EDW), this specific target group was deemed most appropriate for the evaluation. A literature review was conducted, looking at how projects similar in nature to RG were evaluated and what study designs and potential measures were used. This review is described in section 5.2. The rest of the chapter describes the design, methodology, results, and discussion of the RG evaluation. This resource structure validation study compared RG with SQL-based tools using a sample of nonexpert users. Using the R G approach, the subjects achieved significantly higher scores in solving analytical tasks, and also scored higher in tasks which required understanding of given analytical solutions. The study demonstrated that most users preferred RG to SQL because RG was easier to learn, it better supported temporal tasks, and it seemed to be a more logical modeling paradigm. Using UTAUT technology acceptance prediction model, the study results suggest that a fully developed, RG-like technology likely would be well accepted by users
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
Running decision support logic retrospectively to determine guideline adherence: a case study with diabetes
Get PDFposterWe describe the application of our previously developed analytical infrastructure called RetroGuide to conduct studies on retrospective data using a clinician friendly flowchart paradigm. Introduction Requiring additional clinician?s input in a new decision support system (DSS) is often a major implementation obstacle. Another limitation is the process of fine tuning the exact logic of the new DSS, which is often done in the production environment after piloting an initial version and gathering clinicians? feedback. Our approach was to utilize only currently available Electronic Health Record data (EHR) and beta test the logic and impact of a potential decision support module using only retrospective data. The main objective of this study is to demonstrate the use of a suite of medical informatics tools called RetroGuide [1] for such an effort. As a case study, the problem of blood pressure control in diabetic patients and adherence to the JNC7 hypertension guideline is presented. Methods Intermountain Healthcare?s Enterprise Data Warehouse (EDW) was used as the source of coded lifetime EHRs. RetroGuide was used to create graphical scenarios representing a temporal sequence of events of interest associated with analytical questions. RetroGuide uses a workflow engine to execute the modeled scenario on real retrospective data and produces a series of reports about the scenario execution. Type II diabetic patients with at least 2 available blood pressure measurements and some additional criteria were included in the study (194 subjects total). Results A simplified version of the executable flowchart is shown in Figure 1. The scenario logic included some temporal restrictions on the considered blood pressure values as shown in Figure 1. The variables inside brackets show that the engine can remember the timestamp or value associated with a previously identified event. According to the JNC7 guideline the systolic blood pressure value should always be maintained less than 140 mmHg. RetroGuide output showed that 15.9% of study patients had both values over 140 (31/194; 95% CI 10.4 - 21.4). We investigated 27 additional related clinical questions in a more complex scenario. Discussion: In contrast with a comparable study also investigating blood pressure control in diabetics [2] our methodology enables easy integration of additional temporal restrictions on the considered blood pressure values or other events of interest. Additional advantages of RetroGuide when compared to traditional SQL-based database tools are: (a) a user-friendly flowchart model as a shared logic formalism between the DSS developer and clinicians; and (b) support for extensive ?drill-down? capability into available EHR data via a hierarchy of customizable reports. We have also initiated a controlled study to evaluate the suitability of RetroGuide?s methodology to lower the skill barrier for ?champion? clinicians to run analyses on data in large EDWs. The value of our graphical tool will increase as more detail is stored in EHR, longer time-span is available and its temporal aspects are better
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
- …
