1,721,014 research outputs found
High Priority IoT Standardisation Gaps and Relevant SDOs. Release 3.0
No full textThis report introduces an approach for the definition and identification of key IoT gaps in several initiatives. Based on the prioritisation of these gaps, the deliverable starts to address the work done within the relevant Standards Developing Organisations (SDOs) that need to cooperate in order to solve these gaps. The key purpose of this report is to reflect a structured discussion within the AIOTI WG Standardisation and to provide consolidated technical elements as well as guidance and recommendations on identified IoT gaps. This release of the report can be considered as a complete new version, where some of the gap analysis concepts introduced in the AIOTI report "High Priority IoT Standardisation Gaps and Relevant SDOs Release 2.0" have been reused
Using TDL for Standardised Test Purpose Definitions
No full textS.514-521This article reports on experiences from the use of the ETSI Test Description Language (TDL) and its extension for structured test objective specification (TDL-TO) for the definition of functional and non-functional test purposes in the Internet of Things (IoT) domain. The experiences are based on results from different working groups at ETSI TC MTS and the ETSI Specialist Task Force (STF) 574, focusing on the definition of test purposes for functional, security, and performance testing of the CoAP and MQTT protocols as well as VxLTE interoperability testing
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
Performance and reliability model checking and model construction
No full textContinuous-time Markov chains (CTMCs) are widely used to describe stochastic phenomena in many diverse areas. They are used to estimate performance and reliability characteristics of various nature, for instance to quantify throughputs of manufacturing systems, to locate bottlenecks in communication systems, or to estimate reliability in aerospace systems. CTMCs are the underlying semantic model of major high level performance modelling formalisms such as stochastic Petri nets, stochastic process algebras, and Markovian queueing networks. Model checking is a very successful technique to establish correctness of systems from very similar application domains, usually described in terms of a nondeterministic finite-state model. One of the major reasons for the success of model checking tools in practice is the efficient way to cope with the state-space explosion problem, using symbolic (BDD-based) techniques. In this talk, I will introduce CTMCs and discuss the use of model checking to assess performance and reliability properties of CTMCs. With this approach, properties-of-interest are expressed as formulas of a stochastic extension of the logic CTL and interpreted over CTMCs. Model checking this logic requires the solution of linear systems of equations and of systems of Volterra integral equations. I will outline approximate techniques for solving the equation systems, and present a JAVA implementation of a Markov chain model checker. My introduction to CTMC model checking will be complemented with a discussion of CTMC model construction techniques. I will survey formal methods that facilitate the construction of large CTMC models. In particular I will focus on high-level formalisms supporting a modern, hierarchical and compositional design methodology. Existing tool support, as well as techniques to combat the state space explosion problem will be discussed
Test System Architectures using Advanced Standardized Test Languages
No full textThe development of test suites using standardized test languages like TTCN-3 and UTP starts with an analysis of the external interfaces towards the system under test (SUT). Large and complex SUTs often require a distributed test system architecture that have to consider the test objectives and the introduction of multiple parallel test system components. The decomposition of a test system needs to be discussed and decided at the very beginning of the test development process. This presentation introduces different approaches from industrial test suite development projects and provides experiences with abstract test system architecture issues (e.g. synchronization, logging and maintenance)
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
- …
