75,895 research outputs found
Construct redundancy in process modelling grammars: Improving the explanatory power of ontological analysis
Conceptual modelling supports developers and users of information systems in areas of documentation, analysis or system redesign. The ongoing interest in the modelling of business processes has led to a variety of different grammars, raising the question of the quality of these grammars for modelling. An established way of evaluating the quality of a modelling grammar is by means of an ontological analysis, which can determine the extent to which grammars contain construct deficit, overload, excess or redundancy. While several studies have shown the relevance of most of these criteria, predictions about construct redundancy have yielded inconsistent results in the past, with some studies suggesting that redundancy may even be beneficial for modelling in practice. In this paper we seek to contribute to clarifying the concept of construct redundancy by introducing a revision to the ontological analysis method. Based on the concept of inheritance we propose an approach that distinguishes between specialized and distinct construct redundancy. We demonstrate the potential explanatory power of the revised method by reviewing and clarifying previous results found in the literature
Quantum teleportation and Grover's algorithm without the wavefunction
In the same way as the quantum no-cloning theorem and quantum key
distribution in two preceding papers, entanglement-assisted quantum
teleportation and Grover's search algorithm are generalized by transferring
them to an abstract setting, including usual quantum mechanics as a special
case. This again shows that a much more general and abstract access to these
quantum mechanical features is possible than commonly thought. A non-classical
extension of conditional probability and, particularly, a very special type of
state-independent conditional probability are used instead of Hilbert spaces
and wavefunctions.Comment: 21 pages, including annex, important typo in annex corrected in v2,
Found Phys (2017
Governance for sustainability: learning from VSM practice
Purpose â While there is some agreement on the usefulness of systems and complexity approaches to tackle the sustainability challenges facing the organisations and governments in the twenty-first century, less is clear regarding the way such approaches can inspire new ways of governance for sustainability. The purpose of this paper is to progress ongoing research using the Viable System Model (VSM) as a meta-language to facilitate long-term sustainability in business, communities and societies, using the âMethodology to support self-transformationâ, by focusing on ways of learning about governance for sustainability. Design/methodology/approach â It summarises core self-governance challenges for long-term sustainability, and the organisational capabilities required to face them, at the âFramework for Assessing Sustainable Governanceâ. This tool is then used to analyse capabilities for governance for sustainability at three real situations where the mentioned Methodology inspired bottom up processes of self-organisation. It analyses the transformations decided from each organisation, in terms of capabilities for sustainable governance, using the suggested Framework. Findings â Core technical lessons learned from using the framework are discussed, include the usefulness of using a unified language and tool when studying governance for sustainability in differing types and scales of case study organisations. Research limitations/implications â As with other exploratory research, it reckons the convenience for further development and testing of the proposed tools to improve their reliability and robustness. Practical implications â A final conclusion suggests that the suggested tools offer a useful heuristic path to learn about governance for sustainability, from a VSM perspective; the learning from each organisational self-transformation regarding governance for sustainability is insightful for policy and strategy design and evaluation; in particular the possibility of comparing situations from different scales and types of organisations. Originality/value â There is very little coherence in the governance literature and the field of governance for sustainability is an emerging field. This piece of exploratory research is valuable as it presents an effective tool to learn about governance for sustainability, based in the âMethodology for Self-Transformationâ; and offers reflexions on applications of the methodology and the tool, that contribute to clarify the meaning of governance for sustainability in practice, in organisations from different scales and types
XRound : A reversible template language and its application in model-based security analysis
Successful analysis of the models used in Model-Driven Development requires the ability to synthesise the results of analysis and automatically integrate these results with the models themselves. This paper presents a reversible template language called XRound which supports round-trip transformations between models and the logic used to encode system properties. A template processor that supports the language is described, and the use of the template language is illustrated by its application in an analysis workbench, designed to support analysis of security properties of UML and MOF-based models. As a result of using reversible templates, it is possible to seamlessly and automatically integrate the results of a security analysis with a model. (C) 2008 Elsevier B.V. All rights reserved
Holistic engineering design : a combined synchronous and asynchronous approach
To aid the creation and through-life support of large, complex engineering products, organizations are placing a greater emphasis on constructing complete and accurate records of design activities. Current documentary approaches are not sufficient to capture activities and decisions in their entirety and can lead to organizations revisiting and in some cases reworking design decisions in order to understand previous design episodes. Design activities are undertaken in a variety of modes; many of which are dichotomous, and thus each require separate documentary mechanisms to capture information in an efficient manner. It is possible to identify the modes of learning and transaction to describe whether an activity is aimed at increasing a level of understanding or whether it involves manipulating information to achieve a tangible task. The dichotomy of interest in this paper is that of synchronous and asynchronous working, where engineers may work alternately as part of a group or as individuals and where different forms of record are necessary to adequately capture the processes and rationale employed in each mode. This paper introduces complimentary approaches to achieving richer representations of design activities performed synchronously and asynchronously, and through the undertaking of a design based case study, highlights the benefit of each approach. The resulting records serve to provide a more complete depiction of activities undertaken, and provide positive direction for future co-development of the approaches
Tourism to religious sites, case studies from Hungary and England: exploring paradoxical views on tourism, commodification and costâbenefits
The application of systems theory to tourism development has a pedigree that has largely been derived from econometrics and macroâeconomic theory (Baggio et al., 2010; Franch et al., 2010; Choi and Sirakaya, 2006; Schianetz and Kavanagh, 2007, 2008; Dwyer et al., 2010). This paper identifies opportunities and some barriers to developing sites of religious worship for tourism to maximise income and engage appropriate resources allocation strategies. The authors have investigated tourism development that is sympathetic to sacred purposes at these sites over several years. Religious sites are now acknowledging that homogeneous supply responses may no longer be appropriate. Each special site demands a heterogeneous response of site guardians to changeable demand and careful evaluation of how to maximise income generated from very limited resources. This necessitates improved skills in guardians to build appropriate point of sale products and services that fit with consumption expectations and are congruent with sacred purpose
Testing the Box-Cox Parameter for an Integrated Process
This paper analyses the constant elasticity of volatility (CEV) model suggested by Chan et al. (1992). The CEV model without mean reversion is shown to be the inverse Box-Cox transformation of integrated processes asymptotically. It is demonstrated that the maximum likelihood estimator of the power parameter has a nonstandard asymptotic distribution, which is expressed as an integral of Brownian motions, when the data generating process is not mean reverting. However, it is shown that the t-ratio follows a standard normal distribution asymptotically, so that the use of the conventional t-test in analyzing the power parameter of the CEV model is justified even if there is no mean reversion, as is often the case in empirical research. The model may applied to ultra high frequency data.Box-Cox transformation; Brownian Motion; Constant Elasticity of Volatility; Mean Reversion; Nonstandard distribution
The Transnational Constitution of Europeâs Social Market Economies: A Question of Constitutional Imbalances?
Throughout its history the European integration process has not undermined but rather strengthened the autonomy of Member States vis-Ă -vis wider societal interests in relation to political economy, labour markets and social provisions. Both the âgolden age nation stateâ of the 1960s as well as the considerable transformations of Member State political economies over the past decades, and especially after the euro-crisis, was to a considerable degree orchestrated through transnational, most notably European, arrangements. In both cases the primary objective has been to strengthened state capacities of public power and law against the encroachment of private interests into the state. In spite of this continuity considerable changes can however be observed in the substantial economic policies advanced due to the switch from a Keynesian to a monetarist economic paradigm. It is suggested that the debate on constitutional imbalances between the EUâs economic and social constitutions should be seen in this light
Company âEmigrationâ and EC Freedom of Establishment: Daily Mail Revisited
Following the ECJâs recent case law on EC freedom of establishment (the Centros, Ăberseering and Inspire Art cases), regulatory competition for corporate law within the European Union takes place at an early stage of the incorporation of new companies. In contrast, as regards the âmoving outâ of companies from the country of incorporation, the ECJ once considered a tax law restriction against the transfer abroad of a companyâs administrative seat as compatible with EC freedom of establishment (the Daily Mail case). For years, this decision has been regarded as applicable to all restrictions imposed by countries of incorporation, even the forced liquidation of the âemigratingâ company. This paper addresses the question whether EC freedom of establishment really allows Member States to place any limit on the âemigrationâ of nationally registered companies. It argues that EC freedom of establishment covers the transfer of the administrative seat as well as the transfer of the registered office and, therefore, that the country of incorporation cannot liquidate âemigratingâ companies. In addition, it addresses the question whether a new Directive is needed to allow the transfer of a com- panyâs registered office and the identity-preserving company law changes. It argues that such a Directive is necessary to avoid legal uncertainty and to protect the interests of employees, creditors and minority shareholders, among others, who could be detrimentally affected by the âemigrationâ of national companies
E-discovery viewed as integrated human-computer sensemaking: the challenge of 'Frames'
In addressing the question of the design on technologies for e-discovery it is essential to recognise that
such work takes place through a system in which both people and technology interact as a complex
whole. Technology can promote discovery and insight and support human sensemaking, but the
question hangs on the extent to which it naturally extends the way that legal practitioners think and
work. We describe research at UCL which uses this as a starting point for empirical studies to inform
the design of supporting technologies. We report aspects of an interview field study with lawyers who
worked on a large regulatory investigation. Using data from this study we describe document review
and analysis in terms of a sequence of transitions between different kinds of representation. We then
focus on one particular transition: the creation of chronology records from documents. We develop the
idea that investigators make sense of evidence by the application of conceptual âframesâ (Klein et alâs,
2006), but whilst the investigator âseesâ the situation in terms of these frames, the system âseesâ the
situation in terms of documents, textual tokens and metadata. We conclude that design leverage can be
obtained through the development of technologies that aggregate content around investigatorsâ frames.
We outline further research to explore this further
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