1,720,954 research outputs found
Verification of artifact-centric systems: Decidability and modeling issues
No full textArtifact-centric business processes have recently emerged as an approach in which processes are centred around the evolution of business entities, called artifacts, giving equal importance to control-flow and data. The recent Guard-State-Milestone (GSM) framework provides means for specifying business artifacts lifecycles in a declarative manner, using constructs that match how executive-level stakeholders think about their business. However, it turns out that formal verification of GSM is undecidable even for very simple propositional temporal properties. We attack this challenging problem by translating GSM into a well-studied formal framework.We exploit this translation to isolate an interesting class of "state-bounded" GSM models for which verification of sophisticated temporal properties is decidable. We then introduce some guidelines to turn an arbitrary GSM model into a state-bounded, verifiable model. © 2013 Springer-Verlag
Logical formalization of Semantic Business Vocabulary and Rules
Get PDFIm Kontext der Geschäftsprozessmodellierung verwenden Verordnungen und Richtlinien deontische und in natürlicher Sprache verfasste Formulierungen, um menschliches Verhalten zu artikulieren.Andererseits werden alethischen Regeln verwendet, um die Struktur eines Business-Bereiches zu beschreiben. Da Geschäftsmodelle stetig komplizierter werden, ist der Bedarf für ein logisches Rahmenwerk gegeben, welches automatische Schlußfolgerung mit Geschäftsregeln ermöglicht. Der vielversprechendster Kandidat für solch einen Rahmenwerk ist der Standard für Semantics of Business Vocabulary and Business Rules (SBVR). Obwohl es eine formale Syntax für SBVR gibt, zum Beispiel die ORM2 Spezifikationssprache, fehlt dem SBVR Standard zur Zeit noch immer eine solide und konsistente logische Formalisierung, die eine automatisierte Konsistenzprüfung von Geschäftsregeln im Geschäftsmodellen ermöglichen würde. Diese Arbeit berichtet über den Aufbau der logischen Grundlagen für den SBVR Standard, nämlich die deontisch-alethische Prädikatenlogik FODAL. Diese wurde entwickelt, um die erwünschte Semantik und Interaktion von Geschäftsregeln zu erfassen.Wir begutachten die logischen Eigenschaften der FODAL Formalisierung wie Vollständigkeit und Korrektheit. Darüber hinaus untersuchten wir Verbindungen von FODAL mit anderen logischen Formalismen einschließlich Prädikatenlogik und der ALCQI Beschreibungslogik. Wir zeigten auch die Entscheidbarkeit eines bestimmten FODAL-Fragments und entwickelten daraufhin ein Programm zur Konsistenzprüfung von deontischen und alethischen Geschäftsregeln, die in ALCQI ausdruckbar sind. Wir haben weiters eine Übersetzung der oben genannten Klasse von Geschäftsregeln in eine OWL2 Ontologie umgesetzt. Dieses Programm wurde im Rahmen des FP7 ONTORULE Projekt entwickelt und wurde in einem öffentlichen ONTORULE Bericht publiziert.Artifacts such as laws, regulations and policies, use deontic constructs expressed in natural language to articulate human behavior, as well as alethic rules, describing what the organization takes things to be. In most cases such artifacts have a rather ambiguous semantics, which can hardly be formalized. But sometimes a logical framework can be built to provide automated tools for validation and verification of the artifacts.The most promising candidate for such a framework is a recently approved Semantics of Business Vocabulary and Business Rules (SBVR) standard.Despite existence of formally grounded notations, e.g. ORM2 specification language, up to now SBVR still lacks a sound and consistent logical formalization which allows developing solutions able to automatically test business models for consistency of regulations.This work reports on the attempt to provide logical foundations for the SBVR standard by means of defining a specific first-order deontic-alethic logic (FODAL) designed to capture the desired semantics of business rules.We also report on logical properties of the aforementioned formalization, such as completeness and soundness. Moreover, we studied its connections with other logical formalisms, including satisfiability reduction to the first-order logic and the description logic ALCQI, which allows to obtain decidability results for a certain fragment of FODAL logic.As a result, a special tool providing automated support for consistency checks of a set of ALCQI-expressible deontic and alethic business rules was implemented. This tool was developed in the context of the ONTORULE FP7 project and became a part of the public deliverable. Addressing the objective of the project to combine rules and ontologies, we also implemented a translation of the aforementioned class of business rules into an OWL2 ontology, which facilitates integration with other modeling tools and fulfilment of the demand for automated solutions with reasoning support
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
