1,720,968 research outputs found
Macodo: Architecture-Centric Support for Dynamic Service Collaborations
No full textFlexible integration and collaboration of information systems, both within and across company borders, has become essential to success in current business environments. In the domain of supply chain management, for example, the arrival of a new order can no longer be handled by a single system. Instead, it requires complex collaborations, between multiple systems and services across companies, that constantly have to be adapted to changing market needs. The primary goal of information technology in such domains is to support flexible integration and collaboration between these systems. Without proper integration and collaboration, systems can easily become islands of information, resulting in inefficient and inflexible solutions. Realizing collaborations and building the supporting infrastructures, however, poses huge engineering challenges, from architectural design to actual implementation. To address these challenges, current state of practice relies on middleware, workflow management, service-oriented architecture, and Web services.In this thesis, we argue that several engineering challenges are insufficiently addressed by current state of practice, such as modularization of collaborations, managing complexity, and separation of concerns. This often leads to faults, complex solutions with little reuse, and reduced productivity. Most of these problems relate to the lack of proper collaboration abstractions and the missing reification of these abstractions throughout the development process. To address a number of these problems, we present Macodo, an approach that consists of three complementary parts: (1) a set of abstractions for dynamic service collaborations, (2) a set of architectural views that reify these abstractions at architectural level, allowing to build and document service collaborations in terms of software elements, and (3) a middleware infrastructure that supports the collaboration abstractions at implementation level. Macodo focusses on service collaborations that take place in a restricted collaboration environment, managed by a trusted party. To validate the contributions of this thesis, we apply them in a supply chain management case and evaluate them in a controlled experiment. Results show that the use of Macodo, compared to state of practice, can provide an improvement in terms of fault density, design complexity, level of reuse, and productivity.status: Publishe
Evaluation of Macodo: A controlled experiment
No full textIn today's volatile business environments, collaboration between information systems, both within and across company borders, has become essential to success. Developing such collaborative applications and building the supporting information systems poses several engineering challenges. A key challenge is to manage the ever growing design complexity. State of the art solutions, however, often lack proper abstractions for modeling collaborations at architectural level or do not reify these abstractions at detailed design and implementation level. Developers, on the other hand, rely on middleware, business process management, and Web services, techniques that mainly focus on low-level infrastructure.
Macodo addresses the problem of managing the design complexity of collaborative applications with three contributions: (1) a set of abstractions for modeling dynamic collaborations, (2) a set of architectural views, the main contribution of this paper, that reify these abstractions at architectural level, and (3) a proof of concept middleware infrastructure that supports the architectural abstractions at design and implementation level. In this document, we report on an empirical study that evaluates the main contribution of Macodo, the architectural views. The study is performed with 67 final year students of a Master in Software Engineering program from a university in Sweden and 2 universities in Ukraine. Results show that the use of Macodo~can reduce fault density and design complexity, and improve reuse and productivity.status: Publishe
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
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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