Evolving Objects in Temporal Information Systems

This paper presents a semantic foundation of temporal conceptual models used to design temporal information systems. We consider a modelling language able to express both timestamping and evolution constraints. We conduct a deeper investigation of evolution constraints, eventually devising a model-theoretic semantics for a full-fledged model with both timestamping and evolution constraints. The proposed formalization is meant both to clarify the meaning of the various temporal constructors that appeared in the literature and to give a rigorous definition, in the context of temporal information systems, to notions like satisfiability, subsumption and logical implication. Furthermore, we show how to express temporal constraints using a subset of first-order temporal logic, i.e. DLRUS, the description logic DLR extended with the temporal operators Since and Until. We show how DLRUS is able to capture the various modelling constraints in a succinct way and to perform automated reasoning on temporal conceptual models

Sensitivity analysis in a scoping review on police accountability : assessing the feasibility of reporting criteria in mixed studies reviews

In this paper, we report on the findings of a sensitivity analysis that was carried out within a previously conducted scoping review, hoping to contribute to the ongoing debate about how to assess the quality of research in mixed methods reviews. Previous sensitivity analyses mainly concluded that the exclusion of inadequately reported or lower quality studies did not have a significant effect on the results of the synthesis. In this study, we conducted a sensitivity analysis on the basis of reporting criteria with the aims of analysing its impact on the synthesis results and assessing its feasibility. Contrary to some previous studies, our analysis showed that the exclusion of inadequately reported studies had an impact on the results of the thematic synthesis. Initially, we also sought to propose a refinement of reporting criteria based on the literature and our own experiences. In this way, we aimed to facilitate the assessment of reporting criteria and enhance its consistency. However, based on the results of our sensitivity analysis, we opted not to make such a refinement since many publications included in this analysis did not sufficiently report on the methodology. As such, a refinement would not be useful considering that researchers would be unable to assess these (sub-)criteria

Analysis of current and future trends in synchronization, deadlock, and recovery in distributed databases

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Foresight in Public Policymaking: An Exploration of Process Practices

Despite governments’ recognition of the importance of maintaining a forward-looking approach in policymaking, the actual inclusion of information and insight concerning the future into policy development does not appear widely implemented. However, existing literature on ‘public’ Foresight appears predominantly prescriptive, offering limited information concerning its actual practices and their possible consequences on both the output and its acceptance and uptake. The investigation focussed on how Foresight activities (“FAs”) are being carried out within the public sector, in order to identify which practices – in their preparation, execution, and management – could be ultimately affecting the way the insight thus generated is accepted and used (or not). This enquiry is intended to help identify best practices for FAs that can support both the quality of any insight produced and its ability to contribute to policy design and – ultimately – delivery. The goal was to explore and understand current practices and their possible effects and implications, in order to ‘abduce’ from them the theory components that would underpin said recommendations. Data collection for this Grounded Theory approach was carried out first during an in-depth case study, and subsequently during focused interviews carried out six years after the case. This made it possible for the events to play out fully, as well as allowing the subjects interviewed sufficient perspective and emotional distance from the facts. The data analysis led the Researcher to identify fifteen elements of practice that appear to have a crucial impact on the quality and performance of the outcomes of Foresight activities and exercises, as well as thirteen areas of impact which clarify where and how such quality and performance may be affected, and a table which attempts to map the connections between each element and the areas it influences. The thesis concludes with suggestions for fifteen recommendations for practitioners

Three Pillars of Historical Wisdom: Atomization, Data Building and Flexibility: On historical databases for research

Rapport interne à l'usage des utilisateurs de la base de données FichozA short treatise on how to build an efficient, open and flexible database system for historical research. In other words, how to build an efficient tool for the management of information while wholly preserving the indefinition of basic data and direct availability for a variety of users belonging to a same field, but pursuing different purposes. With a final reference to Fichoz database.Bref traité sur comment construire un système de bases de données efficace pour la recherche historique. En d'autres termes, comment construire un outil efficace pour le traitement de l'information, qui préserve intégralement à la fois l'indéfinition des données de départ tout en étant immédiatement disponibles pour une communauté d'utilisateurs qui, bien que relevant du même champ, poursuivent chacun des stratégies et des buts de recherche différents. Avec une référence finale à la base de données Fichoz

Administrative Profiles Unit and Multi-Sessions Management Scheme for IPBrick Private Cloud

IPBrick solution for the Private Cloud has some limitations which can be challenged in future by its competitors in the market. The administrative access to the web interface of an IPBrick server is restricted to one user who manages everything by using a given set of features and services. The existing solution also does not support Multi-Sessions Management due to which multiple update operations can't be applied on the database simultaneously and if it is attempted then it can have adverse affects on the consistency of data stored in the Database. The aim of this thesis is to develop features like Administrative Profiles and Multi-Sessions Management for the betterment of IPBrick Solution