1,720,993 research outputs found
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
Provably Sound Nullness Analysis of Java Code
No full textNull pointer dereferences in Java raise exceptions, occur often, are hard to debug and cost a lot of unnecessary effort and resources. Therefore, a lot of effort has been put in analyses spotting those null pointer dereferences. As developers rely on those analyses it is important that they are sound. However, proving null pointer analyses sound has been a complex problem. Hence, we developed a nullness analysis for Java that is provably sound. The analysis is built as an abstract interpreter upon the sturdy framework, that allows for compositional soundness proofs. This reduces the proof effort greatly. By creating a concrete interpreter, and by generating arbitrary programs, we were able to assess the soundness of the nullness analysis to great extend. Also, we have proven a part of the analysis to be sound in a formal way.sturd
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
RaTrace: Simple and efficient abstractions for BVH ray traversal algorithms
No full textIn order to achieve the highest possible performance, the ray traversal and intersection routines at the core of every high-performance ray tracer are usually hand-coded, heavily optimized, and implemented separately for each hardware platform—even though they share most of their algorithmic core. The results are implementations that heavily mix algorithmic aspects with hardware and implementation details, making the code non-portable and difficult to change and maintain.
In this paper, we present a new approach that offers the ability to define in a functional language a set of conceptual, high-level language abstractions that are optimized away by a special compiler in order to maximize performance. Using this abstraction mechanism we separate a generic ray traversal and intersection algorithm from its low-level aspects that are specific to the target hardware. We demonstrate that our code is not only significantly more flexible, simpler to write, and more concise but also that the compiled results perform as well as state-of-the-art implementations on any of the tested CPU and GPU platforms
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
Scriptable Debugging - A Reactive Approach
No full textDebuggers are crucial tools for developers to support the process of developing software systems as they provide direct insights into the execution of their code. As software development in the industry is moving towards technology stacks that operate on increasingly higher levels of abstraction, debugging tools have not evolved as quickly. This creates an abstraction gap between the concrete debugging needs of developers and the support that debugging tools offer. To reduce this gap, we propose a generic framework for reactive scriptable debugging. We propose a design and reference implementation of such a scriptable debugging system. Using this framework we aim to liberate developers from rigid debugging tools and give the power of debugging back to the developers
The Design and Implementation of a Domain-Specific Language for the Description of Medical Devices
No full textLeQuest develops interactive e-training modules to improve the competence regarding medical technology of medical professionals. The medical technology is analysed by LeQuest to develop training modules, but the analysis process and writing associated information can be performed more efficiently. This would reduce the required time and resources which could be invested in additional trainings and quality improvements. In the end, this will lead to an improvement regarding the patient's safety in health institutions. This work empirically evaluated the Spoofax Workbench by conducting an industrial case-study which consists of the design, implementation and evaluation of a domain-specific language (DSL). The LeQuest DSL is used as a tool for transforming the current analysis process into a more formalized process which does allow for objective observations, measurements and quantifiable information. Although the LeQuest DSL is not integrated in the current work-flow yet, the evaluation has shown that it is expected that the overall quality and efficiency of the analysis process will increase after the introduction of the DSL
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